0.46.0

Fix #3596

.github/FUNDING.yml

@@ -0,0 +1 @@
+github: junegunn

.github/ISSUE_TEMPLATE.md

@@ -1,12 +1,13 @@
+<!-- ISSUES NOT FOLLOWING THIS TEMPLATE WILL BE CLOSED AND DELETED -->
+
 <!-- Check all that apply [x] -->
-- Category
-    - [ ] fzf binary
-    - [ ] fzf-tmux script
-    - [ ] Key bindings
-    - [ ] Completion
-    - [ ] Vim
-    - [ ] Neovim
-    - [ ] Etc.
+
+- [ ] I have read through the manual page (`man fzf`)
+- [ ] I have the latest version of fzf
+- [ ] I have searched through the existing issues
+
+## Info
+
 - OS
     - [ ] Linux
     - [ ] Mac OS X
@@ -17,13 +18,5 @@
     - [ ] zsh
     - [ ] fish
 
-<!--
-### Before submitting
-
-- Make sure that you have the latest version of fzf
-- If you use tmux, make sure $TERM is set to screen or screen-256color
-- For more Vim stuff, check out https://github.com/junegunn/fzf.vim
-
-Describe your problem or suggestion from here ...
--->
+## Problem / Steps to reproduce
 

.github/dependabot.yml

@@ -0,0 +1,10 @@
+version: 2
+updates:
+  - package-ecosystem: "gomod"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+        interval: "weekly"

.github/workflows/codeql-analysis.yml

@@ -0,0 +1,44 @@
+# https://docs.github.com/en/free-pro-team@latest/github/finding-security-vulnerabilities-and-errors-in-your-code/configuring-code-scanning
+name: CodeQL
+
+on:
+  push:
+    branches: [ master, devel ]
+  pull_request:
+    branches: [ master ]
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+jobs:
+  analyze:
+    permissions:
+      actions: read  # for github/codeql-action/init to get workflow details
+      contents: read  # for actions/checkout to fetch code
+      security-events: write  # for github/codeql-action/autobuild to send a status report
+    name: Analyze
+    runs-on: ubuntu-latest
+
+    strategy:
+      fail-fast: false
+      matrix:
+        language: ['go']
+
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v3
+      with:
+        fetch-depth: 0
+
+    # Initializes the CodeQL tools for scanning.
+    - name: Initialize CodeQL
+      uses: github/codeql-action/init@v3
+      with:
+        languages: ${{ matrix.language }}
+
+    - name: Autobuild
+      uses: github/codeql-action/autobuild@v3
+
+    - name: Perform CodeQL Analysis
+      uses: github/codeql-action/analyze@v3

.github/workflows/depsreview.yaml

@@ -0,0 +1,14 @@
+name: 'Dependency Review'
+on: [pull_request]
+
+permissions:
+  contents: read
+
+jobs:
+  dependency-review:
+    runs-on: ubuntu-latest
+    steps:
+      - name: 'Checkout Repository'
+        uses: actions/checkout@v3
+      - name: 'Dependency Review'
+        uses: actions/dependency-review-action@v4

.github/workflows/linux.yml

@@ -0,0 +1,45 @@
+---
+name: Test fzf on Linux
+
+on:
+  push:
+    branches: [ master, devel ]
+  pull_request:
+    branches: [ master ]
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v3
+      with:
+        fetch-depth: 0
+
+    - name: Set up Go
+      uses: actions/setup-go@v5
+      with:
+        go-version: 1.19
+
+    - name: Setup Ruby
+      uses: ruby/setup-ruby@v1
+      with:
+        ruby-version: 3.1.0
+
+    - name: Install packages
+      run: sudo apt-get install --yes zsh fish tmux
+
+    - name: Install Ruby gems
+      run: sudo gem install --no-document minitest:5.17.0 rubocop:1.43.0 rubocop-minitest:0.25.1 rubocop-performance:1.15.2
+
+    - name: Rubocop
+      run: rubocop --require rubocop-minitest --require rubocop-performance
+
+    - name: Unit test
+      run: make test
+
+    - name: Integration test
+      run: make install && ./install --all && LC_ALL=C tmux new-session -d && ruby test/test_go.rb --verbose

.github/workflows/macos.yml

@@ -0,0 +1,45 @@
+---
+name: Test fzf on macOS
+
+on:
+  push:
+    branches: [ master, devel ]
+  pull_request:
+    branches: [ master ]
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+jobs:
+  build:
+    runs-on: macos-latest
+    steps:
+    - uses: actions/checkout@v3
+      with:
+        fetch-depth: 0
+
+    - name: Set up Go
+      uses: actions/setup-go@v5
+      with:
+        go-version: 1.18
+
+    - name: Setup Ruby
+      uses: ruby/setup-ruby@v1
+      with:
+        ruby-version: 3.0.0
+
+    - name: Install packages
+      run: HOMEBREW_NO_INSTALL_CLEANUP=1 brew install fish zsh tmux
+
+    - name: Install Ruby gems
+      run: gem install --no-document minitest:5.14.2 rubocop:1.0.0 rubocop-minitest:0.10.1 rubocop-performance:1.8.1
+
+    - name: Rubocop
+      run: rubocop --require rubocop-minitest --require rubocop-performance
+
+    - name: Unit test
+      run: make test
+
+    - name: Integration test
+      run: make install && ./install --all && LC_ALL=C tmux new-session -d && ruby test/test_go.rb --verbose

.github/workflows/sponsors.yml

@@ -0,0 +1,24 @@
+---
+name: Generate Sponsors README
+on:
+  workflow_dispatch:
+  schedule:
+    - cron: 0 0 * * 0
+jobs:
+  deploy:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout 🛎️
+        uses: actions/checkout@v3
+
+      - name: Generate Sponsors 💖
+        uses: JamesIves/github-sponsors-readme-action@v1
+        with:
+          token: ${{ secrets.SPONSORS_TOKEN }}
+          file: 'README.md'
+
+      - name: Deploy to GitHub Pages 🚀
+        uses: JamesIves/github-pages-deploy-action@v4
+        with:
+          branch: master
+          folder: '.'

.github/workflows/typos.yml

@@ -0,0 +1,10 @@
+name: "Spell Check"
+on: [pull_request]
+
+jobs:
+  typos:
+    name: Spell Check with Typos
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v3
+    - uses: crate-ci/typos@v1.17.2

.github/workflows/winget.yml

@@ -0,0 +1,15 @@
+name: Publish to Winget
+on:
+  release:
+    types: [released]
+
+jobs:
+  publish:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: vedantmgoyal2009/winget-releaser@v2
+        with:
+          identifier: junegunn.fzf
+          version: ${{ github.event.release.tag_name }}
+          installers-regex: '-windows_(armv7|arm64|amd64)\.zip$'
+          token: ${{ secrets.WINGET_TOKEN }}

.gitignore

@@ -1,6 +1,14 @@
-bin
-src/fzf/fzf-*
-gopath
+bin/fzf
+bin/fzf.exe
+dist
+target
 pkg
 Gemfile.lock
 .DS_Store
+doc/tags
+vendor
+gopath
+*.zwc
+fzf
+tmp
+*.patch

.goreleaser.yml

@@ -0,0 +1,126 @@
+---
+project_name: fzf
+
+before:
+  hooks:
+    - go mod download
+
+builds:
+  - id: fzf-macos
+    binary: fzf
+    goos:
+      - darwin
+    goarch:
+      - amd64
+    ldflags:
+      - "-s -w -X main.version={{ .Version }} -X main.revision={{ .ShortCommit }}"
+    hooks:
+      post: |
+        sh -c '
+        cat > /tmp/fzf-gon-amd64.hcl << EOF
+        source = ["./dist/fzf-macos_darwin_amd64_v1/fzf"]
+        bundle_id = "kr.junegunn.fzf"
+        apple_id {
+          username = "junegunn.c@gmail.com"
+          password = "@env:AC_PASSWORD"
+        }
+        sign {
+          application_identity = "Developer ID Application: Junegunn Choi (Y254DRW44Z)"
+        }
+        zip {
+          output_path = "./dist/fzf-{{ .Version }}-darwin_amd64.zip"
+        }
+        EOF
+        gon /tmp/fzf-gon-amd64.hcl
+        '
+
+  - id: fzf-macos-arm
+    binary: fzf
+    goos:
+      - darwin
+    goarch:
+      - arm64
+    ldflags:
+      - "-s -w -X main.version={{ .Version }} -X main.revision={{ .ShortCommit }}"
+    hooks:
+      post: |
+        sh -c '
+        cat > /tmp/fzf-gon-arm64.hcl << EOF
+        source = ["./dist/fzf-macos-arm_darwin_arm64/fzf"]
+        bundle_id = "kr.junegunn.fzf"
+        apple_id {
+          username = "junegunn.c@gmail.com"
+          password = "@env:AC_PASSWORD"
+        }
+        sign {
+          application_identity = "Developer ID Application: Junegunn Choi (Y254DRW44Z)"
+        }
+        zip {
+          output_path = "./dist/fzf-{{ .Version }}-darwin_arm64.zip"
+        }
+        EOF
+        gon /tmp/fzf-gon-arm64.hcl
+        '
+
+  - id: fzf
+    goos:
+      - linux
+      - windows
+      - freebsd
+      - openbsd
+    goarch:
+      - amd64
+      - arm
+      - arm64
+      - loong64
+      - ppc64le
+      - s390x
+    goarm:
+      - 5
+      - 6
+      - 7
+    ldflags:
+      - "-s -w -X main.version={{ .Version }} -X main.revision={{ .ShortCommit }}"
+    ignore:
+      - goos: freebsd
+        goarch: arm
+      - goos: openbsd
+        goarch: arm
+      - goos: freebsd
+        goarch: arm64
+      - goos: openbsd
+        goarch: arm64
+
+archives:
+  - name_template: "{{ .ProjectName }}-{{ .Version }}-{{ .Os }}_{{ .Arch }}{{ if .Arm }}v{{ .Arm }}{{ end }}"
+    builds:
+      - fzf
+    format: tar.gz
+    format_overrides:
+      - goos: windows
+        format: zip
+    files:
+      - non-existent*
+
+checksum:
+  extra_files:
+    - glob: ./dist/fzf-*darwin*.zip
+
+release:
+  github:
+    owner: junegunn
+    name: fzf
+  prerelease: auto
+  name_template: '{{ .Tag }}'
+  extra_files:
+    - glob: ./dist/fzf-*darwin*.zip
+
+snapshot:
+  name_template: "{{ .Tag }}-devel"
+
+changelog:
+  sort: asc
+  filters:
+    exclude:
+      - README
+      - test

.rubocop.yml

@@ -0,0 +1,32 @@
+Layout/LineLength:
+  Enabled: false
+Metrics:
+  Enabled: false
+Lint/ShadowingOuterLocalVariable:
+  Enabled: false
+Style/MethodCallWithArgsParentheses:
+  Enabled: true
+  IgnoredMethods:
+    - assert
+    - exit
+    - paste
+    - puts
+    - raise
+    - refute
+    - require
+    - send_keys
+  IgnoredPatterns:
+    - ^assert_
+    - ^refute_
+Style/NumericPredicate:
+  Enabled: false
+Style/StringConcatenation:
+  Enabled: false
+Style/OptionalBooleanParameter:
+  Enabled: false
+Style/WordArray:
+  MinSize: 1
+Minitest/AssertEqual:
+  Enabled: false
+Naming/VariableNumber:
+  Enabled: false

.tool-versions

@@ -0,0 +1 @@
+golang 1.21.6

.travis.yml

@@ -1,24 +0,0 @@
-language: ruby
-rvm:
-- 2.2.0
-
-install:
-- sudo apt-get update
-- sudo apt-get install -y libncurses-dev lib32ncurses5-dev libgpm-dev
-- sudo add-apt-repository -y ppa:pi-rho/dev
-- sudo apt-add-repository -y ppa:fish-shell/release-2
-- sudo apt-get update
-- sudo apt-get install -y tmux=1.9a-1~ppa1~p
-- sudo apt-get install -y zsh fish
-
-script: |
-  export GOPATH=~/go
-  export FZF_BASE=$GOPATH/src/github.com/junegunn/fzf
-
-  mkdir -p $GOPATH/src/github.com/junegunn
-  ln -s $(pwd) $FZF_BASE
-
-  cd $FZF_BASE/src && make test fzf/fzf-linux_amd64 install &&
-  cd $FZF_BASE/bin && ln -sf fzf-linux_amd64 fzf-$(./fzf --version)-linux_amd64 &&
-  cd $FZF_BASE && yes | ./install && rm -f fzf &&
-  tmux new "ruby test/test_go.rb > out && touch ok" && cat out && [ -e ok ]

ADVANCED.md

@@ -0,0 +1,680 @@
+Advanced fzf examples
+======================
+
+* *Last update: 2024/01/20*
+* *Requires fzf 0.46.0 or above*
+
+---
+
+<!-- vim-markdown-toc GFM -->
+
+* [Introduction](#introduction)
+* [Screen Layout](#screen-layout)
+    * [`--height`](#--height)
+    * [`fzf-tmux`](#fzf-tmux)
+        * [Popup window support](#popup-window-support)
+* [Dynamic reloading of the list](#dynamic-reloading-of-the-list)
+    * [Updating the list of processes by pressing CTRL-R](#updating-the-list-of-processes-by-pressing-ctrl-r)
+    * [Toggling between data sources](#toggling-between-data-sources)
+    * [Toggling with a single key binding](#toggling-with-a-single-key-binding)
+* [Ripgrep integration](#ripgrep-integration)
+    * [Using fzf as the secondary filter](#using-fzf-as-the-secondary-filter)
+    * [Using fzf as interactive Ripgrep launcher](#using-fzf-as-interactive-ripgrep-launcher)
+    * [Switching to fzf-only search mode](#switching-to-fzf-only-search-mode)
+    * [Switching between Ripgrep mode and fzf mode](#switching-between-ripgrep-mode-and-fzf-mode)
+    * [Switching between Ripgrep mode and fzf mode using a single key binding](#switching-between-ripgrep-mode-and-fzf-mode-using-a-single-key-binding)
+* [Log tailing](#log-tailing)
+* [Key bindings for git objects](#key-bindings-for-git-objects)
+    * [Files listed in `git status`](#files-listed-in-git-status)
+    * [Branches](#branches)
+    * [Commit hashes](#commit-hashes)
+* [Color themes](#color-themes)
+    * [fzf Theme Playground](#fzf-theme-playground)
+    * [Generating fzf color theme from Vim color schemes](#generating-fzf-color-theme-from-vim-color-schemes)
+
+<!-- vim-markdown-toc -->
+
+Introduction
+------------
+
+fzf is an interactive [Unix filter][filter] program that is designed to be
+used with other Unix tools. It reads a list of items from the standard input,
+allows you to select a subset of the items, and prints the selected ones to
+the standard output. You can think of it as an interactive version of *grep*,
+and it's already useful even if you don't know any of its options.
+
+```sh
+# 1. ps:   Feed the list of processes to fzf
+# 2. fzf:  Interactively select a process using fuzzy matching algorithm
+# 3. awk:  Take the PID from the selected line
+# 3. kill: Kill the process with the PID
+ps -ef | fzf | awk '{print $2}' | xargs kill -9
+```
+
+[filter]: https://en.wikipedia.org/wiki/Filter_(software)
+
+While the above example succinctly summarizes the fundamental concept of fzf,
+you can build much more sophisticated interactive workflows using fzf once you
+learn its wide variety of features.
+
+- To see the full list of options and features, see `man fzf`
+- To see the latest additions, see [CHANGELOG.md](CHANGELOG.md)
+
+This document will guide you through some examples that will familiarize you
+with the advanced features of fzf.
+
+Screen Layout
+-------------
+
+### `--height`
+
+fzf by default opens in fullscreen mode, but it's not always desirable.
+Oftentimes, you want to see the current context of the terminal while using
+fzf. `--height` is an option for opening fzf below the cursor in
+non-fullscreen mode so you can still see the previous commands and their
+results above it.
+
+```sh
+fzf --height=40%
+```
+
+![image](https://user-images.githubusercontent.com/700826/113379893-c184c680-93b5-11eb-9676-c7c0a2f01748.png)
+
+You might also want to experiment with other layout options such as
+`--layout=reverse`, `--info=inline`, `--border`, `--margin`, etc.
+
+```sh
+fzf --height=40% --layout=reverse
+fzf --height=40% --layout=reverse --info=inline
+fzf --height=40% --layout=reverse --info=inline --border
+fzf --height=40% --layout=reverse --info=inline --border --margin=1
+fzf --height=40% --layout=reverse --info=inline --border --margin=1 --padding=1
+```
+
+![image](https://user-images.githubusercontent.com/700826/113379932-dfeac200-93b5-11eb-9e28-df1a2ee71f90.png)
+
+*(See `Layout` section of the man page to see the full list of options)*
+
+But you definitely don't want to repeat `--height=40% --layout=reverse
+--info=inline --border --margin=1 --padding=1` every time you use fzf. You
+could write a wrapper script or shell alias, but there is an easier option.
+Define `$FZF_DEFAULT_OPTS` like so:
+
+```sh
+export FZF_DEFAULT_OPTS="--height=40% --layout=reverse --info=inline --border --margin=1 --padding=1"
+```
+
+### `fzf-tmux`
+
+Before fzf had `--height` option, we would open fzf in a tmux split pane not
+to take up the whole screen. This is done using `fzf-tmux` script.
+
+```sh
+# Open fzf on a tmux split pane below the current pane.
+# Takes the same set of options.
+fzf-tmux --layout=reverse
+```
+
+![image](https://user-images.githubusercontent.com/700826/113379973-f1cc6500-93b5-11eb-8860-c9bc4498aadf.png)
+
+The limitation of `fzf-tmux` is that it only works when you're on tmux unlike
+`--height` option. But the advantage of it is that it's more flexible.
+(See `man fzf-tmux` for available options.)
+
+```sh
+# On the right (50%)
+fzf-tmux -r
+
+# On the left (30%)
+fzf-tmux -l30%
+
+# Above the cursor
+fzf-tmux -u30%
+```
+
+![image](https://user-images.githubusercontent.com/700826/113379983-fa24a000-93b5-11eb-93eb-8a3d39b2f163.png)
+
+![image](https://user-images.githubusercontent.com/700826/113380001-0577cb80-93b6-11eb-95d0-2ba453866882.png)
+
+![image](https://user-images.githubusercontent.com/700826/113380040-1d4f4f80-93b6-11eb-9bef-737fb120aafe.png)
+
+#### Popup window support
+
+But here's the really cool part; tmux 3.2 added support for popup windows. So
+you can open fzf in a popup window, which is quite useful if you frequently
+use split panes.
+
+```sh
+# Open tmux in a tmux popup window (default size: 50% of the screen)
+fzf-tmux -p
+
+# 80% width, 60% height
+fzf-tmux -p 80%,60%
+```
+
+![image](https://user-images.githubusercontent.com/700826/113380106-4a9bfd80-93b6-11eb-8cee-aeb1c4ce1a1f.png)
+
+> You might also want to check out my tmux plugins which support this popup
+> window layout.
+>
+> - https://github.com/junegunn/tmux-fzf-url
+> - https://github.com/junegunn/tmux-fzf-maccy
+
+Dynamic reloading of the list
+-----------------------------
+
+fzf can dynamically update the candidate list using an arbitrary program with
+`reload` bindings (The design document for `reload` can be found
+[here][reload]).
+
+[reload]: https://github.com/junegunn/fzf/issues/1750
+
+### Updating the list of processes by pressing CTRL-R
+
+This example shows how you can set up a binding for dynamically updating the
+list without restarting fzf.
+
+```sh
+(date; ps -ef) |
+  fzf --bind='ctrl-r:reload(date; ps -ef)' \
+      --header=$'Press CTRL-R to reload\n\n' --header-lines=2 \
+      --preview='echo {}' --preview-window=down,3,wrap \
+      --layout=reverse --height=80% | awk '{print $2}' | xargs kill -9
+```
+
+![image](https://user-images.githubusercontent.com/700826/113465047-200c7c00-946c-11eb-918c-268f37a900c8.png)
+
+- The initial command is `(date; ps -ef)`. It prints the current date and
+  time, and the list of the processes.
+- With `--header` option, you can show any message as the fixed header.
+- To disallow selecting the first two lines (`date` and `ps` header), we use
+  `--header-lines=2` option.
+- `--bind='ctrl-r:reload(date; ps -ef)'` binds CTRL-R to `reload` action that
+  runs `date; ps -ef`, so we can update the list of the processes by pressing
+  CTRL-R.
+- We use simple `echo {}` preview option, so we can see the entire line on the
+  preview window below even if it's too long
+
+### Toggling between data sources
+
+You're not limited to just one reload binding. Set up multiple bindings so
+you can switch between data sources.
+
+```sh
+find * | fzf --prompt 'All> ' \
+             --header 'CTRL-D: Directories / CTRL-F: Files' \
+             --bind 'ctrl-d:change-prompt(Directories> )+reload(find * -type d)' \
+             --bind 'ctrl-f:change-prompt(Files> )+reload(find * -type f)'
+```
+
+![image](https://user-images.githubusercontent.com/700826/113465073-4af6d000-946c-11eb-858f-2372c0955f67.png)
+
+![image](https://user-images.githubusercontent.com/700826/113465072-46321c00-946c-11eb-9b6f-cda3951df579.png)
+
+### Toggling with a single key binding
+
+The above example uses two different key bindings to toggle between two modes,
+but can we just use a single key binding?
+
+To make a key binding behave differently each time it is pressed, we need:
+
+1. a way to store the current state. i.e. "which mode are we in?"
+2. and a way to dynamically perform different actions depending on the state.
+
+The following example shows how to 1. store the current mode in the prompt
+string, 2. and use this information (`$FZF_PROMPT`) to determine which
+actions to perform using the `transform` action.
+
+```sh
+fd --type file |
+  fzf --prompt 'Files> ' \
+      --header 'CTRL-T: Switch between Files/Directories' \
+      --bind 'ctrl-t:transform:[[ ! $FZF_PROMPT =~ Files ]] &&
+              echo "change-prompt(Files> )+reload(fd --type file)" ||
+              echo "change-prompt(Directories> )+reload(fd --type directory)"' \
+      --preview '[[ $FZF_PROMPT =~ Files ]] && bat --color=always {} || tree -C {}'
+```
+
+Ripgrep integration
+-------------------
+
+### Using fzf as the secondary filter
+
+* Requires [bat][bat]
+* Requires [Ripgrep][rg]
+
+[bat]: https://github.com/sharkdp/bat
+[rg]: https://github.com/BurntSushi/ripgrep
+
+fzf is pretty fast for filtering a list that you will rarely have to think
+about its performance. But it is not the right tool for searching for text
+inside many large files, and in that case you should definitely use something
+like [Ripgrep][rg].
+
+In the next example, Ripgrep is the primary filter that searches for the given
+text in files, and fzf is used as the secondary fuzzy filter that adds
+interactivity to the workflow. And we use [bat][bat] to show the matching line in
+the preview window.
+
+This is a bash script and it will not run as expected on other non-compliant
+shells. To avoid the compatibility issue, let's save this snippet as a script
+file called `rfv`.
+
+```bash
+#!/usr/bin/env bash
+
+# 1. Search for text in files using Ripgrep
+# 2. Interactively narrow down the list using fzf
+# 3. Open the file in Vim
+rg --color=always --line-number --no-heading --smart-case "${*:-}" |
+  fzf --ansi \
+      --color "hl:-1:underline,hl+:-1:underline:reverse" \
+      --delimiter : \
+      --preview 'bat --color=always {1} --highlight-line {2}' \
+      --preview-window 'up,60%,border-bottom,+{2}+3/3,~3' \
+      --bind 'enter:become(vim {1} +{2})'
+```
+
+And run it with an initial query string.
+
+```sh
+# Make the script executable
+chmod +x rfv
+
+# Run it with the initial query "algo"
+./rfv algo
+```
+
+> Ripgrep will perform the initial search and list all the lines that contain
+`algo`. Then we further narrow down the list on fzf.
+
+![image](https://user-images.githubusercontent.com/700826/113683873-a42a6200-96ff-11eb-9666-26ce4091b0e4.png)
+
+I know it's a lot to digest, let's try to break down the code.
+
+- Ripgrep prints the matching lines in the following format
+  ```
+  man/man1/fzf.1:54:.BI "--algo=" TYPE
+  man/man1/fzf.1:55:Fuzzy matching algorithm (default: v2)
+  man/man1/fzf.1:58:.BR v2 "     Optimal scoring algorithm (quality)"
+  src/pattern_test.go:7:  "github.com/junegunn/fzf/src/algo"
+  ```
+  The first token delimited by `:` is the file path, and the second token is
+  the line number of the matching line. They respectively correspond to `{1}`
+  and `{2}` in the preview command.
+    - `--preview 'bat --color=always {1} --highlight-line {2}'`
+- As we run `rg` with `--color=always` option, we should tell fzf to parse
+  ANSI color codes in the input by setting `--ansi`.
+- We customize how fzf colors various text elements using `--color` option.
+  `-1` tells fzf to keep the original color from the input. See `man fzf` for
+  available color options.
+- The value of `--preview-window` option consists of 5 components delimited
+  by `,`
+    1. `up` — Position of the preview window
+    1. `60%` — Size of the preview window
+    1. `border-bottom` — Preview window border only on the bottom side
+    1. `+{2}+3/3` — Scroll offset of the preview contents
+    1. `~3` — Fixed header
+- Let's break down the latter two. We want to display the bat output in the
+  preview window with a certain scroll offset so that the matching line is
+  positioned near the center of the preview window.
+    - `+{2}` — The base offset is extracted from the second token
+    - `+3` — We add 3 lines to the base offset to compensate for the header
+      part of `bat` output
+        - ```
+          ───────┬──────────────────────────────────────────────────────────
+                 │ File: CHANGELOG.md
+          ───────┼──────────────────────────────────────────────────────────
+             1   │ CHANGELOG
+             2   │ =========
+             3   │
+             4   │ 0.26.0
+             5   │ ------
+          ```
+    - `/3` adjusts the offset so that the matching line is shown at a third
+      position in the window
+    - `~3` makes the top three lines fixed header so that they are always
+      visible regardless of the scroll offset
+- Instead of using shell script to process the final output of fzf, we use
+  `become(...)` action which was added in [fzf 0.38.0][0.38.0] to turn fzf
+  into a new process that opens the file with `vim` (`vim {1}`) and move the
+  cursor to the line (`+{2}`).
+
+[0.38.0]: https://github.com/junegunn/fzf/blob/master/CHANGELOG.md#0380
+
+### Using fzf as interactive Ripgrep launcher
+
+We have learned that we can bind `reload` action to a key (e.g.
+`--bind=ctrl-r:execute(ps -ef)`). In the next example, we are going to **bind
+`reload` action to `change` event** so that whenever the user *changes* the
+query string on fzf, `reload` action is triggered.
+
+Here is a variation of the above `rfv` script. fzf will restart Ripgrep every
+time the user updates the query string on fzf. Searching and filtering is
+completely done by Ripgrep, and fzf merely provides the interactive interface.
+So we lose the "fuzziness", but the performance will be better on larger
+projects, and it will free up memory as you narrow down the results.
+
+```bash
+#!/usr/bin/env bash
+
+# 1. Search for text in files using Ripgrep
+# 2. Interactively restart Ripgrep with reload action
+# 3. Open the file in Vim
+RG_PREFIX="rg --column --line-number --no-heading --color=always --smart-case "
+INITIAL_QUERY="${*:-}"
+: | fzf --ansi --disabled --query "$INITIAL_QUERY" \
+    --bind "start:reload:$RG_PREFIX {q}" \
+    --bind "change:reload:sleep 0.1; $RG_PREFIX {q} || true" \
+    --delimiter : \
+    --preview 'bat --color=always {1} --highlight-line {2}' \
+    --preview-window 'up,60%,border-bottom,+{2}+3/3,~3' \
+    --bind 'enter:become(vim {1} +{2})'
+```
+
+![image](https://user-images.githubusercontent.com/700826/113684212-f9ff0a00-96ff-11eb-8737-7bb571d320cc.png)
+
+- Instead of starting fzf in the usual `rg ... | fzf` form, we start fzf with
+  an empty input (`: | fzf`), then we make it start the initial Ripgrep
+  process immediately via `start:reload` binding. This way, fzf owns the
+  initial Ripgrep process so it can kill it on the next `reload`. Otherwise,
+  the process will keep running in the background.
+- Filtering is no longer a responsibility of fzf; hence `--disabled`
+- `{q}` in the reload command evaluates to the query string on fzf prompt.
+- `sleep 0.1` in the reload command is for "debouncing". This small delay will
+  reduce the number of intermediate Ripgrep processes while we're typing in
+  a query.
+
+### Switching to fzf-only search mode
+
+In the previous example, we lost fuzzy matching capability as we completely
+delegated search functionality to Ripgrep. But we can dynamically switch to
+fzf-only search mode by *"unbinding"* `reload` action from `change` event.
+
+```sh
+#!/usr/bin/env bash
+
+# Two-phase filtering with Ripgrep and fzf
+#
+# 1. Search for text in files using Ripgrep
+# 2. Interactively restart Ripgrep with reload action
+#    * Press alt-enter to switch to fzf-only filtering
+# 3. Open the file in Vim
+RG_PREFIX="rg --column --line-number --no-heading --color=always --smart-case "
+INITIAL_QUERY="${*:-}"
+: | fzf --ansi --disabled --query "$INITIAL_QUERY" \
+    --bind "start:reload:$RG_PREFIX {q}" \
+    --bind "change:reload:sleep 0.1; $RG_PREFIX {q} || true" \
+    --bind "alt-enter:unbind(change,alt-enter)+change-prompt(2. fzf> )+enable-search+clear-query" \
+    --color "hl:-1:underline,hl+:-1:underline:reverse" \
+    --prompt '1. ripgrep> ' \
+    --delimiter : \
+    --preview 'bat --color=always {1} --highlight-line {2}' \
+    --preview-window 'up,60%,border-bottom,+{2}+3/3,~3' \
+    --bind 'enter:become(vim {1} +{2})'
+```
+
+* Phase 1. Filtering with Ripgrep
+![image](https://user-images.githubusercontent.com/700826/119213880-735e8a80-bafd-11eb-8493-123e4be24fbc.png)
+* Phase 2. Filtering with fzf
+![image](https://user-images.githubusercontent.com/700826/119213887-7e191f80-bafd-11eb-98c9-71a1af9d7aab.png)
+
+- We added `--prompt` option to show that fzf is initially running in "Ripgrep
+  launcher mode".
+- We added `alt-enter` binding that
+    1. unbinds `change` event, so Ripgrep is no longer restarted on key press
+    2. changes the prompt to `2. fzf>`
+    3. enables search functionality of fzf
+    4. clears the current query string that was used to start Ripgrep process
+    5. and unbinds `alt-enter` itself as this is a one-off event
+- We reverted `--color` option for customizing how the matching chunks are
+  displayed in the second phase
+
+### Switching between Ripgrep mode and fzf mode
+
+[fzf 0.30.0][0.30.0] added `rebind` action so we can "rebind" the bindings
+that were previously "unbound" via `unbind`.
+
+This is an improved version of the previous example that allows us to switch
+between Ripgrep launcher mode and fzf-only filtering mode via CTRL-R and
+CTRL-F.
+
+```sh
+#!/usr/bin/env bash
+
+# Switch between Ripgrep launcher mode (CTRL-R) and fzf filtering mode (CTRL-F)
+rm -f /tmp/rg-fzf-{r,f}
+RG_PREFIX="rg --column --line-number --no-heading --color=always --smart-case "
+INITIAL_QUERY="${*:-}"
+: | fzf --ansi --disabled --query "$INITIAL_QUERY" \
+    --bind "start:reload($RG_PREFIX {q})+unbind(ctrl-r)" \
+    --bind "change:reload:sleep 0.1; $RG_PREFIX {q} || true" \
+    --bind "ctrl-f:unbind(change,ctrl-f)+change-prompt(2. fzf> )+enable-search+rebind(ctrl-r)+transform-query(echo {q} > /tmp/rg-fzf-r; cat /tmp/rg-fzf-f)" \
+    --bind "ctrl-r:unbind(ctrl-r)+change-prompt(1. ripgrep> )+disable-search+reload($RG_PREFIX {q} || true)+rebind(change,ctrl-f)+transform-query(echo {q} > /tmp/rg-fzf-f; cat /tmp/rg-fzf-r)" \
+    --color "hl:-1:underline,hl+:-1:underline:reverse" \
+    --prompt '1. ripgrep> ' \
+    --delimiter : \
+    --header '╱ CTRL-R (ripgrep mode) ╱ CTRL-F (fzf mode) ╱' \
+    --preview 'bat --color=always {1} --highlight-line {2}' \
+    --preview-window 'up,60%,border-bottom,+{2}+3/3,~3' \
+    --bind 'enter:become(vim {1} +{2})'
+```
+
+- To restore the query string when switching between modes, we store the
+  current query in `/tmp/rg-fzf-{r,f}` files and restore the query using
+  `transform-query` action which was added in [fzf 0.36.0][0.36.0].
+- Also note that we unbind `ctrl-r` binding on `start` event which is
+  triggered once when fzf starts.
+
+[0.30.0]: https://github.com/junegunn/fzf/blob/master/CHANGELOG.md#0300
+[0.36.0]: https://github.com/junegunn/fzf/blob/master/CHANGELOG.md#0360
+
+### Switching between Ripgrep mode and fzf mode using a single key binding
+
+In contrast to the previous version, we use just one hotkey to toggle between
+ripgrep and fzf mode. This is achieved by using the `$FZF_PROMPT` as a state
+within the `transform` action, a feature introduced in [fzf 0.45.0][0.45.0]. A
+more detailed explanation of this feature can be found in a previous section -
+[Toggling with a single keybinding](#toggling-with-a-single-key-binding).
+
+[0.45.0]: https://github.com/junegunn/fzf/blob/master/CHANGELOG.md#0450
+
+When using the `transform` action, the placeholder (`\{q}`) should be escaped to
+prevent immediate evaluation.
+
+```sh
+#!/usr/bin/env bash
+
+# Switch between Ripgrep mode and fzf filtering mode (CTRL-T)
+rm -f /tmp/rg-fzf-{r,f}
+RG_PREFIX="rg --column --line-number --no-heading --color=always --smart-case "
+INITIAL_QUERY="${*:-}"
+: | fzf --ansi --disabled --query "$INITIAL_QUERY" \
+    --bind "start:reload:$RG_PREFIX {q}" \
+    --bind "change:reload:sleep 0.1; $RG_PREFIX {q} || true" \
+    --bind 'ctrl-t:transform:[[ ! $FZF_PROMPT =~ ripgrep ]] &&
+      echo "rebind(change)+change-prompt(1. ripgrep> )+disable-search+transform-query:echo \{q} > /tmp/rg-fzf-f; cat /tmp/rg-fzf-r" ||
+      echo "unbind(change)+change-prompt(2. fzf> )+enable-search+transform-query:echo \{q} > /tmp/rg-fzf-r; cat /tmp/rg-fzf-f"' \
+    --color "hl:-1:underline,hl+:-1:underline:reverse" \
+    --prompt '1. ripgrep> ' \
+    --delimiter : \
+    --header 'CTRL-T: Switch between ripgrep/fzf' \
+    --preview 'bat --color=always {1} --highlight-line {2}' \
+    --preview-window 'up,60%,border-bottom,+{2}+3/3,~3' \
+    --bind 'enter:become(vim {1} +{2})'
+```
+
+Log tailing
+-----------
+
+fzf can run long-running preview commands and render partial results before
+completion. And when you specify `follow` flag in `--preview-window` option,
+fzf will "`tail -f`" the result, automatically scrolling to the bottom.
+
+```bash
+# With "follow", preview window will automatically scroll to the bottom.
+# "\033[2J" is an ANSI escape sequence for clearing the screen.
+# When fzf reads this code it clears the previous preview contents.
+fzf --preview-window follow --preview 'for i in $(seq 100000); do
+  echo "$i"
+  sleep 0.01
+  (( i % 300 == 0 )) && printf "\033[2J"
+done'
+```
+
+![image](https://user-images.githubusercontent.com/700826/113473303-dd669600-94a3-11eb-88a9-1f61b996bb0e.png)
+
+Admittedly, that was a silly example. Here's a practical one for browsing
+Kubernetes pods.
+
+```bash
+pods() {
+  : | command='kubectl get pods --all-namespaces' fzf \
+    --info=inline --layout=reverse --header-lines=1 \
+    --prompt "$(kubectl config current-context | sed 's/-context$//')> " \
+    --header $'╱ Enter (kubectl exec) ╱ CTRL-O (open log in editor) ╱ CTRL-R (reload) ╱\n\n' \
+    --bind 'start:reload:$command' \
+    --bind 'ctrl-r:reload:$command' \
+    --bind 'ctrl-/:change-preview-window(80%,border-bottom|hidden|)' \
+    --bind 'enter:execute:kubectl exec -it --namespace {1} {2} -- bash > /dev/tty' \
+    --bind 'ctrl-o:execute:${EDITOR:-vim} <(kubectl logs --all-containers --namespace {1} {2}) > /dev/tty' \
+    --preview-window up:follow \
+    --preview 'kubectl logs --follow --all-containers --tail=10000 --namespace {1} {2}' "$@"
+}
+```
+
+![image](https://user-images.githubusercontent.com/700826/113473547-1d7a4880-94a5-11eb-98ef-9aa6f0ed215a.png)
+
+- The preview window will *"log tail"* the pod
+    - Holding on to a large amount of log will consume a lot of memory. So we
+      limited the initial log amount with `--tail=10000`.
+- `execute` bindings allow you to run any command without leaving fzf
+    - Press enter key on a pod to `kubectl exec` into it
+    - Press CTRL-O to open the log in your editor
+- Press CTRL-R to reload the pod list
+- Press CTRL-/ repeatedly to to rotate through a different sets of preview
+  window options
+    1. `80%,border-bottom`
+    1. `hidden`
+    1. Empty string after `|` translates to the default options from `--preview-window`
+
+Key bindings for git objects
+----------------------------
+
+Oftentimes, you want to put the identifiers of various Git object to the
+command-line. For example, it is common to write commands like these:
+
+```sh
+git checkout [SOME_COMMIT_HASH or BRANCH or TAG]
+git diff [SOME_COMMIT_HASH or BRANCH or TAG] [SOME_COMMIT_HASH or BRANCH or TAG]
+```
+
+[fzf-git.sh](https://github.com/junegunn/fzf-git.sh) project defines a set of
+fzf-based key bindings for Git objects. I strongly recommend that you check
+them out because they are seriously useful.
+
+### Files listed in `git status`
+
+<kbd>CTRL-G</kbd><kbd>CTRL-F</kbd>
+
+![image](https://user-images.githubusercontent.com/700826/113473779-a9d93b00-94a6-11eb-87b5-f62a8d0a0efc.png)
+
+### Branches
+
+<kbd>CTRL-G</kbd><kbd>CTRL-B</kbd>
+
+![image](https://user-images.githubusercontent.com/700826/113473758-87dfb880-94a6-11eb-82f4-9218103f10bd.png)
+
+### Commit hashes
+
+<kbd>CTRL-G</kbd><kbd>CTRL-H</kbd>
+
+![image](https://user-images.githubusercontent.com/700826/113473765-91692080-94a6-11eb-8d38-ed4d41f27ac1.png)
+
+Color themes
+------------
+
+You can customize how fzf colors the text elements with `--color` option. Here
+are a few color themes. Note that you need a terminal emulator that can
+display 24-bit colors.
+
+```sh
+# junegunn/seoul256.vim (dark)
+export FZF_DEFAULT_OPTS='--color=bg+:#3F3F3F,bg:#4B4B4B,border:#6B6B6B,spinner:#98BC99,hl:#719872,fg:#D9D9D9,header:#719872,info:#BDBB72,pointer:#E12672,marker:#E17899,fg+:#D9D9D9,preview-bg:#3F3F3F,prompt:#98BEDE,hl+:#98BC99'
+```
+
+![seoul256](https://user-images.githubusercontent.com/700826/113475011-2c192d80-94ae-11eb-9d17-1e5867bae01f.png)
+
+```sh
+# junegunn/seoul256.vim (light)
+export FZF_DEFAULT_OPTS='--color=bg+:#D9D9D9,bg:#E1E1E1,border:#C8C8C8,spinner:#719899,hl:#719872,fg:#616161,header:#719872,info:#727100,pointer:#E12672,marker:#E17899,fg+:#616161,preview-bg:#D9D9D9,prompt:#0099BD,hl+:#719899'
+```
+
+![seoul256-light](https://user-images.githubusercontent.com/700826/113475022-389d8600-94ae-11eb-905f-0939dd535837.png)
+
+```sh
+# morhetz/gruvbox
+export FZF_DEFAULT_OPTS='--color=bg+:#3c3836,bg:#32302f,spinner:#fb4934,hl:#928374,fg:#ebdbb2,header:#928374,info:#8ec07c,pointer:#fb4934,marker:#fb4934,fg+:#ebdbb2,prompt:#fb4934,hl+:#fb4934'
+```
+
+![gruvbox](https://user-images.githubusercontent.com/700826/113475042-494dfc00-94ae-11eb-9322-cd03a027305a.png)
+
+```sh
+# arcticicestudio/nord-vim
+export FZF_DEFAULT_OPTS='--color=bg+:#3B4252,bg:#2E3440,spinner:#81A1C1,hl:#616E88,fg:#D8DEE9,header:#616E88,info:#81A1C1,pointer:#81A1C1,marker:#81A1C1,fg+:#D8DEE9,prompt:#81A1C1,hl+:#81A1C1'
+```
+
+![nord](https://user-images.githubusercontent.com/700826/113475063-67b3f780-94ae-11eb-9b24-5f0d22b63399.png)
+
+```sh
+# tomasr/molokai
+export FZF_DEFAULT_OPTS='--color=bg+:#293739,bg:#1B1D1E,border:#808080,spinner:#E6DB74,hl:#7E8E91,fg:#F8F8F2,header:#7E8E91,info:#A6E22E,pointer:#A6E22E,marker:#F92672,fg+:#F8F8F2,prompt:#F92672,hl+:#F92672'
+```
+
+![molokai](https://user-images.githubusercontent.com/700826/113475085-8619f300-94ae-11eb-85e4-2766fc3246bf.png)
+
+### fzf Theme Playground
+
+[fzf Theme Playground](https://vitormv.github.io/fzf-themes/) created by
+[Vitor Mello](https://github.com/vitormv) is a webpage where you can
+interactively create fzf themes.
+
+### Generating fzf color theme from Vim color schemes
+
+The Vim plugin of fzf can generate `--color` option from the current color
+scheme according to `g:fzf_colors` variable. You can find the detailed
+explanation [here](https://github.com/junegunn/fzf/blob/master/README-VIM.md#explanation-of-gfzf_colors).
+
+Here is an example. Add this to your Vim configuration file.
+
+```vim
+let g:fzf_colors =
+\ { 'fg':         ['fg', 'Normal'],
+  \ 'bg':         ['bg', 'Normal'],
+  \ 'preview-bg': ['bg', 'NormalFloat'],
+  \ 'hl':         ['fg', 'Comment'],
+  \ 'fg+':        ['fg', 'CursorLine', 'CursorColumn', 'Normal'],
+  \ 'bg+':        ['bg', 'CursorLine', 'CursorColumn'],
+  \ 'hl+':        ['fg', 'Statement'],
+  \ 'info':       ['fg', 'PreProc'],
+  \ 'border':     ['fg', 'Ignore'],
+  \ 'prompt':     ['fg', 'Conditional'],
+  \ 'pointer':    ['fg', 'Exception'],
+  \ 'marker':     ['fg', 'Keyword'],
+  \ 'spinner':    ['fg', 'Label'],
+  \ 'header':     ['fg', 'Comment'] }
+```
+
+Then you can see how the `--color` option is generated by printing the result
+of `fzf#wrap()`.
+
+```vim
+:echo fzf#wrap()
+```
+
+Use this command to append `export FZF_DEFAULT_OPTS="..."` line to the end of
+the current file.
+
+```vim
+:call append('$', printf('export FZF_DEFAULT_OPTS="%s"', matchstr(fzf#wrap().options, "--color[^']*")))
+```

BUILD.md

@@ -0,0 +1,49 @@
+Building fzf
+============
+
+Build instructions
+------------------
+
+### Prerequisites
+
+- Go 1.18 or above
+
+### Using Makefile
+
+```sh
+# Build fzf binary for your platform in target
+make
+
+# Build fzf binary and copy it to bin directory
+make install
+
+# Build fzf binaries and archives for all platforms using goreleaser
+make build
+
+# Publish GitHub release
+make release
+```
+
+> :warning: Makefile uses git commands to determine the version and the
+> revision information for `fzf --version`. So if you're building fzf from an
+> environment where its git information is not available, you have to manually
+> set `$FZF_VERSION` and `$FZF_REVISION`.
+>
+> e.g. `FZF_VERSION=0.24.0 FZF_REVISION=tarball make`
+
+Third-party libraries used
+--------------------------
+
+- [rivo/uniseg](https://github.com/rivo/uniseg)
+    - Licensed under [MIT](https://raw.githubusercontent.com/rivo/uniseg/master/LICENSE.txt)
+- [mattn/go-shellwords](https://github.com/mattn/go-shellwords)
+    - Licensed under [MIT](http://mattn.mit-license.org)
+- [mattn/go-isatty](https://github.com/mattn/go-isatty)
+    - Licensed under [MIT](http://mattn.mit-license.org)
+- [tcell](https://github.com/gdamore/tcell)
+    - Licensed under [Apache License 2.0](https://github.com/gdamore/tcell/blob/master/LICENSE)
+
+License
+-------
+
+[MIT](LICENSE)

Dockerfile

@@ -0,0 +1,12 @@
+FROM --platform=linux/amd64 ubuntu:22.04
+RUN apt-get update -y && apt install -y git make golang zsh fish ruby tmux
+RUN gem install --no-document -v 5.14.2 minitest
+RUN echo '. /usr/share/bash-completion/completions/git' >> ~/.bashrc
+RUN echo '. ~/.bashrc' >> ~/.bash_profile
+
+# Do not set default PS1
+RUN rm -f /etc/bash.bashrc
+COPY . /fzf
+RUN cd /fzf && make install && ./install --all
+ENV LANG C.UTF-8
+CMD tmux new 'set -o pipefail; ruby /fzf/test/test_go.rb | tee out && touch ok' && cat out && [ -e ok ]

LICENSE

@@ -1,6 +1,6 @@
 The MIT License (MIT)
 
-Copyright (c) 2016 Junegunn Choi
+Copyright (c) 2013-2024 Junegunn Choi
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

Makefile

@@ -0,0 +1,187 @@
+SHELL          := bash
+GO             ?= go
+GOOS           ?= $(word 1, $(subst /, " ", $(word 4, $(shell go version))))
+
+MAKEFILE       := $(realpath $(lastword $(MAKEFILE_LIST)))
+ROOT_DIR       := $(shell dirname $(MAKEFILE))
+SOURCES        := $(wildcard *.go src/*.go src/*/*.go) $(MAKEFILE)
+
+ifdef FZF_VERSION
+VERSION        := $(FZF_VERSION)
+else
+VERSION        := $(shell git describe --abbrev=0 2> /dev/null)
+endif
+ifeq ($(VERSION),)
+$(error Not on git repository; cannot determine $$FZF_VERSION)
+endif
+VERSION_TRIM   := $(shell sed "s/-.*//" <<< $(VERSION))
+VERSION_REGEX  := $(subst .,\.,$(VERSION_TRIM))
+
+ifdef FZF_REVISION
+REVISION       := $(FZF_REVISION)
+else
+REVISION       := $(shell git log -n 1 --pretty=format:%h --abbrev=8 -- $(SOURCES) 2> /dev/null)
+endif
+ifeq ($(REVISION),)
+$(error Not on git repository; cannot determine $$FZF_REVISION)
+endif
+BUILD_FLAGS    := -a -ldflags "-s -w -X main.version=$(VERSION) -X main.revision=$(REVISION)" -tags "$(TAGS)"
+
+BINARY32       := fzf-$(GOOS)_386
+BINARY64       := fzf-$(GOOS)_amd64
+BINARYS390     := fzf-$(GOOS)_s390x
+BINARYARM5     := fzf-$(GOOS)_arm5
+BINARYARM6     := fzf-$(GOOS)_arm6
+BINARYARM7     := fzf-$(GOOS)_arm7
+BINARYARM8     := fzf-$(GOOS)_arm8
+BINARYPPC64LE  := fzf-$(GOOS)_ppc64le
+BINARYRISCV64  := fzf-$(GOOS)_riscv64
+BINARYLOONG64  := fzf-$(GOOS)_loong64
+
+# https://en.wikipedia.org/wiki/Uname
+UNAME_M := $(shell uname -m)
+ifeq ($(UNAME_M),x86_64)
+	BINARY := $(BINARY64)
+else ifeq ($(UNAME_M),amd64)
+	BINARY := $(BINARY64)
+else ifeq ($(UNAME_M),s390x)
+	BINARY := $(BINARYS390)
+else ifeq ($(UNAME_M),i686)
+	BINARY := $(BINARY32)
+else ifeq ($(UNAME_M),i386)
+	BINARY := $(BINARY32)
+else ifeq ($(UNAME_M),armv5l)
+	BINARY := $(BINARYARM5)
+else ifeq ($(UNAME_M),armv6l)
+	BINARY := $(BINARYARM6)
+else ifeq ($(UNAME_M),armv7l)
+	BINARY := $(BINARYARM7)
+else ifeq ($(UNAME_M),armv8l)
+	# armv8l is always 32-bit and should implement the armv7 ISA, so
+	# just use the same filename as for armv7.
+	BINARY := $(BINARYARM7)
+else ifeq ($(UNAME_M),arm64)
+	BINARY := $(BINARYARM8)
+else ifeq ($(UNAME_M),aarch64)
+	BINARY := $(BINARYARM8)
+else ifeq ($(UNAME_M),ppc64le)
+	BINARY := $(BINARYPPC64LE)
+else ifeq ($(UNAME_M),riscv64)
+	BINARY := $(BINARYRISCV64)
+else ifeq ($(UNAME_M),loongarch64)
+	BINARY := $(BINARYLOONG64)
+else
+$(error Build on $(UNAME_M) is not supported, yet.)
+endif
+
+all: target/$(BINARY)
+
+test: $(SOURCES)
+	[ -z "$$(gofmt -s -d src)" ] || (gofmt -s -d src; exit 1)
+	SHELL=/bin/sh GOOS= $(GO) test -v -tags "$(TAGS)" \
+				github.com/junegunn/fzf/src \
+				github.com/junegunn/fzf/src/algo \
+				github.com/junegunn/fzf/src/tui \
+				github.com/junegunn/fzf/src/util
+
+bench:
+	cd src && SHELL=/bin/sh GOOS= $(GO) test -v -tags "$(TAGS)" -run=Bench -bench=. -benchmem
+
+install: bin/fzf
+
+generate:
+	PATH=$(PATH):$(GOPATH)/bin $(GO) generate ./...
+
+build:
+	goreleaser build --clean --snapshot --skip=post-hooks
+
+release:
+	# Make sure that the tests pass and the build works
+	TAGS=tcell make test
+	make test build clean
+
+ifndef GITHUB_TOKEN
+	$(error GITHUB_TOKEN is not defined)
+endif
+
+	# Check if we are on master branch
+ifneq ($(shell git symbolic-ref --short HEAD),master)
+	$(error Not on master branch)
+endif
+
+	# Check if version numbers are properly updated
+	grep -q ^$(VERSION_REGEX)$$ CHANGELOG.md
+	grep -qF '"fzf $(VERSION_TRIM)"' man/man1/fzf.1
+	grep -qF '"fzf $(VERSION_TRIM)"' man/man1/fzf-tmux.1
+	grep -qF $(VERSION) install
+	grep -qF $(VERSION) install.ps1
+
+	# Make release note out of CHANGELOG.md
+	mkdir -p tmp
+	sed -n '/^$(VERSION_REGEX)$$/,/^[0-9]/p' CHANGELOG.md | tail -r | \
+		sed '1,/^ *$$/d' | tail -r | sed 1,2d | tee tmp/release-note
+
+	# Push to temp branch first so that install scripts always works on master branch
+	git checkout -B temp master
+	git push origin temp --follow-tags --force
+
+	# Make a GitHub release
+	goreleaser --clean --release-notes tmp/release-note
+
+	# Push to master
+	git checkout master
+	git push origin master
+
+	# Delete temp branch
+	git push origin --delete temp
+
+clean:
+	$(RM) -r dist target
+
+target/$(BINARY32): $(SOURCES)
+	GOARCH=386 $(GO) build $(BUILD_FLAGS) -o $@
+
+target/$(BINARY64): $(SOURCES)
+	GOARCH=amd64 $(GO) build $(BUILD_FLAGS) -o $@
+
+target/$(BINARYS390): $(SOURCES)
+	GOARCH=s390x $(GO) build $(BUILD_FLAGS) -o $@
+# https://github.com/golang/go/wiki/GoArm
+target/$(BINARYARM5): $(SOURCES)
+	GOARCH=arm GOARM=5 $(GO) build $(BUILD_FLAGS) -o $@
+
+target/$(BINARYARM6): $(SOURCES)
+	GOARCH=arm GOARM=6 $(GO) build $(BUILD_FLAGS) -o $@
+
+target/$(BINARYARM7): $(SOURCES)
+	GOARCH=arm GOARM=7 $(GO) build $(BUILD_FLAGS) -o $@
+
+target/$(BINARYARM8): $(SOURCES)
+	GOARCH=arm64 $(GO) build $(BUILD_FLAGS) -o $@
+
+target/$(BINARYPPC64LE): $(SOURCES)
+	GOARCH=ppc64le $(GO) build $(BUILD_FLAGS) -o $@
+
+target/$(BINARYRISCV64): $(SOURCES)
+	GOARCH=riscv64 $(GO) build $(BUILD_FLAGS) -o $@
+
+target/$(BINARYLOONG64): $(SOURCES)
+	GOARCH=loong64 $(GO) build $(BUILD_FLAGS) -o $@
+
+bin/fzf: target/$(BINARY) | bin
+	-rm -f bin/fzf
+	cp -f target/$(BINARY) bin/fzf
+
+docker:
+	docker build -t fzf-arch .
+	docker run -it fzf-arch tmux
+
+docker-test:
+	docker build -t fzf-arch .
+	docker run -it fzf-arch
+
+update:
+	$(GO) get -u
+	$(GO) mod tidy
+
+.PHONY: all generate build release test bench install clean docker docker-test update

README-VIM.md

@@ -0,0 +1,492 @@
+FZF Vim integration
+===================
+
+Installation
+------------
+
+Once you have fzf installed, you can enable it inside Vim simply by adding the
+directory to `&runtimepath` in your Vim configuration file. The path may
+differ depending on the package manager.
+
+```vim
+" If installed using Homebrew
+set rtp+=/usr/local/opt/fzf
+
+" If installed using Homebrew on Apple Silicon
+set rtp+=/opt/homebrew/opt/fzf
+
+" If you have cloned fzf on ~/.fzf directory
+set rtp+=~/.fzf
+```
+
+If you use [vim-plug](https://github.com/junegunn/vim-plug), the same can be
+written as:
+
+```vim
+" If installed using Homebrew
+Plug '/usr/local/opt/fzf'
+
+" If installed using Homebrew on Apple Silicon
+Plug '/opt/homebrew/opt/fzf'
+
+" If you have cloned fzf on ~/.fzf directory
+Plug '~/.fzf'
+```
+
+But if you want the latest Vim plugin file from GitHub rather than the one
+included in the package, write:
+
+```vim
+Plug 'junegunn/fzf'
+```
+
+The Vim plugin will pick up fzf binary available on the system. If fzf is not
+found on `$PATH`, it will ask you if it should download the latest binary for
+you.
+
+To make sure that you have the latest version of the binary, set up
+post-update hook like so:
+
+```vim
+Plug 'junegunn/fzf', { 'do': { -> fzf#install() } }
+```
+
+Summary
+-------
+
+The Vim plugin of fzf provides two core functions, and `:FZF` command which is
+the basic file selector command built on top of them.
+
+1. **`fzf#run([spec dict])`**
+    - Starts fzf inside Vim with the given spec
+    - `:call fzf#run({'source': 'ls'})`
+2. **`fzf#wrap([spec dict]) -> (dict)`**
+    - Takes a spec for `fzf#run` and returns an extended version of it with
+      additional options for addressing global preferences (`g:fzf_xxx`)
+        - `:echo fzf#wrap({'source': 'ls'})`
+    - We usually *wrap* a spec with `fzf#wrap` before passing it to `fzf#run`
+        - `:call fzf#run(fzf#wrap({'source': 'ls'}))`
+3. **`:FZF [fzf_options string] [path string]`**
+    - Basic fuzzy file selector
+    - A reference implementation for those who don't want to write VimScript
+      to implement custom commands
+    - If you're looking for more such commands, check out [fzf.vim](https://github.com/junegunn/fzf.vim) project.
+
+The most important of all is `fzf#run`, but it would be easier to understand
+the whole if we start off with `:FZF` command.
+
+`:FZF[!]`
+---------
+
+```vim
+" Look for files under current directory
+:FZF
+
+" Look for files under your home directory
+:FZF ~
+
+" With fzf command-line options
+:FZF --reverse --info=inline /tmp
+
+" Bang version starts fzf in fullscreen mode
+:FZF!
+```
+
+Similarly to [ctrlp.vim](https://github.com/kien/ctrlp.vim), use enter key,
+`CTRL-T`, `CTRL-X` or `CTRL-V` to open selected files in the current window,
+in new tabs, in horizontal splits, or in vertical splits respectively.
+
+Note that the environment variables `FZF_DEFAULT_COMMAND` and
+`FZF_DEFAULT_OPTS` also apply here.
+
+### Configuration
+
+- `g:fzf_action`
+    - Customizable extra key bindings for opening selected files in different ways
+- `g:fzf_layout`
+    - Determines the size and position of fzf window
+- `g:fzf_colors`
+    - Customizes fzf colors to match the current color scheme
+- `g:fzf_history_dir`
+    - Enables history feature
+
+#### Examples
+
+```vim
+" This is the default extra key bindings
+let g:fzf_action = {
+  \ 'ctrl-t': 'tab split',
+  \ 'ctrl-x': 'split',
+  \ 'ctrl-v': 'vsplit' }
+
+" An action can be a reference to a function that processes selected lines
+function! s:build_quickfix_list(lines)
+  call setqflist(map(copy(a:lines), '{ "filename": v:val, "lnum": 1 }'))
+  copen
+  cc
+endfunction
+
+let g:fzf_action = {
+  \ 'ctrl-q': function('s:build_quickfix_list'),
+  \ 'ctrl-t': 'tab split',
+  \ 'ctrl-x': 'split',
+  \ 'ctrl-v': 'vsplit' }
+
+" Default fzf layout
+" - Popup window (center of the screen)
+let g:fzf_layout = { 'window': { 'width': 0.9, 'height': 0.6 } }
+
+" - Popup window (center of the current window)
+let g:fzf_layout = { 'window': { 'width': 0.9, 'height': 0.6, 'relative': v:true } }
+
+" - Popup window (anchored to the bottom of the current window)
+let g:fzf_layout = { 'window': { 'width': 0.9, 'height': 0.6, 'relative': v:true, 'yoffset': 1.0 } }
+
+" - down / up / left / right
+let g:fzf_layout = { 'down': '40%' }
+
+" - Window using a Vim command
+let g:fzf_layout = { 'window': 'enew' }
+let g:fzf_layout = { 'window': '-tabnew' }
+let g:fzf_layout = { 'window': '10new' }
+
+" Customize fzf colors to match your color scheme
+" - fzf#wrap translates this to a set of `--color` options
+let g:fzf_colors =
+\ { 'fg':      ['fg', 'Normal'],
+  \ 'bg':      ['bg', 'Normal'],
+  \ 'hl':      ['fg', 'Comment'],
+  \ 'fg+':     ['fg', 'CursorLine', 'CursorColumn', 'Normal'],
+  \ 'bg+':     ['bg', 'CursorLine', 'CursorColumn'],
+  \ 'hl+':     ['fg', 'Statement'],
+  \ 'info':    ['fg', 'PreProc'],
+  \ 'border':  ['fg', 'Ignore'],
+  \ 'prompt':  ['fg', 'Conditional'],
+  \ 'pointer': ['fg', 'Exception'],
+  \ 'marker':  ['fg', 'Keyword'],
+  \ 'spinner': ['fg', 'Label'],
+  \ 'header':  ['fg', 'Comment'] }
+
+" Enable per-command history
+" - History files will be stored in the specified directory
+" - When set, CTRL-N and CTRL-P will be bound to 'next-history' and
+"   'previous-history' instead of 'down' and 'up'.
+let g:fzf_history_dir = '~/.local/share/fzf-history'
+```
+
+##### Explanation of `g:fzf_colors`
+
+`g:fzf_colors` is a dictionary mapping fzf elements to a color specification
+list:
+
+    element: [ component, group1 [, group2, ...] ]
+
+- `element` is an fzf element to apply a color to:
+
+  | Element                     | Description                                           |
+  | ---                         | ---                                                   |
+  | `fg`  / `bg`  / `hl`        | Item (foreground / background / highlight)            |
+  | `fg+` / `bg+` / `hl+`       | Current item (foreground / background / highlight)    |
+  | `preview-fg` / `preview-bg` | Preview window text and background                    |
+  | `hl`  / `hl+`               | Highlighted substrings (normal / current)             |
+  | `gutter`                    | Background of the gutter on the left                  |
+  | `pointer`                   | Pointer to the current line (`>`)                     |
+  | `marker`                    | Multi-select marker (`>`)                             |
+  | `border`                    | Border around the window (`--border` and `--preview`) |
+  | `header`                    | Header (`--header` or `--header-lines`)               |
+  | `info`                      | Info line (match counters)                            |
+  | `spinner`                   | Streaming input indicator                             |
+  | `query`                     | Query string                                          |
+  | `disabled`                  | Query string when search is disabled                  |
+  | `prompt`                    | Prompt before query (`> `)                            |
+  | `pointer`                   | Pointer to the current line (`>`)                     |
+
+- `component` specifies the component (`fg` / `bg`) from which to extract the
+  color when considering each of the following highlight groups
+
+- `group1 [, group2, ...]` is a list of highlight groups that are searched (in
+  order) for a matching color definition
+
+For example, consider the following specification:
+
+```vim
+  'prompt':  ['fg', 'Conditional', 'Comment'],
+```
+
+This means we color the **prompt**
+- using the `fg` attribute of the `Conditional` if it exists,
+- otherwise use the `fg` attribute of the `Comment` highlight group if it exists,
+- otherwise fall back to the default color settings for the **prompt**.
+
+You can examine the color option generated according the setting by printing
+the result of `fzf#wrap()` function like so:
+
+```vim
+:echo fzf#wrap()
+```
+
+`fzf#run`
+---------
+
+`fzf#run()` function is the core of Vim integration. It takes a single
+dictionary argument, *a spec*, and starts fzf process accordingly. At the very
+least, specify `sink` option to tell what it should do with the selected
+entry.
+
+```vim
+call fzf#run({'sink': 'e'})
+```
+
+We haven't specified the `source`, so this is equivalent to starting fzf on
+command line without standard input pipe; fzf will use find command (or
+`$FZF_DEFAULT_COMMAND` if defined) to list the files under the current
+directory. When you select one, it will open it with the sink, `:e` command.
+If you want to open it in a new tab, you can pass `:tabedit` command instead
+as the sink.
+
+```vim
+call fzf#run({'sink': 'tabedit'})
+```
+
+Instead of using the default find command, you can use any shell command as
+the source. The following example will list the files managed by git. It's
+equivalent to running `git ls-files | fzf` on shell.
+
+```vim
+call fzf#run({'source': 'git ls-files', 'sink': 'e'})
+```
+
+fzf options can be specified as `options` entry in spec dictionary.
+
+```vim
+call fzf#run({'sink': 'tabedit', 'options': '--multi --reverse'})
+```
+
+You can also pass a layout option if you don't want fzf window to take up the
+entire screen.
+
+```vim
+" up / down / left / right / window are allowed
+call fzf#run({'source': 'git ls-files', 'sink': 'e', 'left': '40%'})
+call fzf#run({'source': 'git ls-files', 'sink': 'e', 'window': '30vnew'})
+```
+
+`source` doesn't have to be an external shell command, you can pass a Vim
+array as the source. In the next example, we pass the names of color
+schemes as the source to implement a color scheme selector.
+
+```vim
+call fzf#run({'source': map(split(globpath(&rtp, 'colors/*.vim')),
+            \               'fnamemodify(v:val, ":t:r")'),
+            \ 'sink': 'colo', 'left': '25%'})
+```
+
+The following table summarizes the available options.
+
+| Option name                | Type          | Description                                                           |
+| -------------------------- | ------------- | ----------------------------------------------------------------      |
+| `source`                   | string        | External command to generate input to fzf (e.g. `find .`)             |
+| `source`                   | list          | Vim list as input to fzf                                              |
+| `sink`                     | string        | Vim command to handle the selected item (e.g. `e`, `tabe`)            |
+| `sink`                     | funcref       | Reference to function to process each selected item                   |
+| `sinklist` (or `sink*`)    | funcref       | Similar to `sink`, but takes the list of output lines at once         |
+| `options`                  | string/list   | Options to fzf                                                        |
+| `dir`                      | string        | Working directory                                                     |
+| `up`/`down`/`left`/`right` | number/string | (Layout) Window position and size (e.g. `20`, `50%`)                  |
+| `tmux`                     | string        | (Layout) fzf-tmux options (e.g. `-p90%,60%`)                          |
+| `window` (Vim 8 / Neovim)  | string        | (Layout) Command to open fzf window (e.g. `vertical aboveleft 30new`) |
+| `window` (Vim 8 / Neovim)  | dict          | (Layout) Popup window settings (e.g. `{'width': 0.9, 'height': 0.6}`) |
+
+`options` entry can be either a string or a list. For simple cases, string
+should suffice, but prefer to use list type to avoid escaping issues.
+
+```vim
+call fzf#run({'options': '--reverse --prompt "C:\\Program Files\\"'})
+call fzf#run({'options': ['--reverse', '--prompt', 'C:\Program Files\']})
+```
+
+When `window` entry is a dictionary, fzf will start in a popup window. The
+following options are allowed:
+
+- Required:
+    - `width` [float range [0 ~ 1]] or [integer range [8 ~ ]]
+    - `height` [float range [0 ~ 1]] or [integer range [4 ~ ]]
+- Optional:
+    - `yoffset` [float default 0.5 range [0 ~ 1]]
+    - `xoffset` [float default 0.5 range [0 ~ 1]]
+    - `relative` [boolean default v:false]
+    - `border` [string default `rounded` (`sharp` on Windows)]: Border style
+        - `rounded` / `sharp` / `horizontal` / `vertical` / `top` / `bottom` / `left` / `right` / `no[ne]`
+
+`fzf#wrap`
+----------
+
+We have seen that several aspects of `:FZF` command can be configured with
+a set of global option variables; different ways to open files
+(`g:fzf_action`), window position and size (`g:fzf_layout`), color palette
+(`g:fzf_colors`), etc.
+
+So how can we make our custom `fzf#run` calls also respect those variables?
+Simply by *"wrapping"* the spec dictionary with `fzf#wrap` before passing it
+to `fzf#run`.
+
+- **`fzf#wrap([name string], [spec dict], [fullscreen bool]) -> (dict)`**
+    - All arguments are optional. Usually we only need to pass a spec dictionary.
+    - `name` is for managing history files. It is ignored if
+      `g:fzf_history_dir` is not defined.
+    - `fullscreen` can be either `0` or `1` (default: 0).
+
+`fzf#wrap` takes a spec and returns an extended version of it (also
+a dictionary) with additional options for addressing global preferences. You
+can examine the return value of it like so:
+
+```vim
+echo fzf#wrap({'source': 'ls'})
+```
+
+After we *"wrap"* our spec, we pass it to `fzf#run`.
+
+```vim
+call fzf#run(fzf#wrap({'source': 'ls'}))
+```
+
+Now it supports `CTRL-T`, `CTRL-V`, and `CTRL-X` key bindings (configurable
+via `g:fzf_action`) and it opens fzf window according to `g:fzf_layout`
+setting.
+
+To make it easier to use, let's define `LS` command.
+
+```vim
+command! LS call fzf#run(fzf#wrap({'source': 'ls'}))
+```
+
+Type `:LS` and see how it works.
+
+We would like to make `:LS!` (bang version) open fzf in fullscreen, just like
+`:FZF!`. Add `-bang` to command definition, and use `<bang>` value to set
+the last `fullscreen` argument of `fzf#wrap` (see `:help <bang>`).
+
+```vim
+" On :LS!, <bang> evaluates to '!', and '!0' becomes 1
+command! -bang LS call fzf#run(fzf#wrap({'source': 'ls'}, <bang>0))
+```
+
+Our `:LS` command will be much more useful if we can pass a directory argument
+to it, so that something like `:LS /tmp` is possible.
+
+```vim
+command! -bang -complete=dir -nargs=? LS
+    \ call fzf#run(fzf#wrap({'source': 'ls', 'dir': <q-args>}, <bang>0))
+```
+
+Lastly, if you have enabled `g:fzf_history_dir`, you might want to assign
+a unique name to our command and pass it as the first argument to `fzf#wrap`.
+
+```vim
+" The query history for this command will be stored as 'ls' inside g:fzf_history_dir.
+" The name is ignored if g:fzf_history_dir is not defined.
+command! -bang -complete=dir -nargs=? LS
+    \ call fzf#run(fzf#wrap('ls', {'source': 'ls', 'dir': <q-args>}, <bang>0))
+```
+
+### Global options supported by `fzf#wrap`
+
+- `g:fzf_layout`
+- `g:fzf_action`
+    - **Works only when no custom `sink` (or `sinklist`) is provided**
+        - Having custom sink usually means that each entry is not an ordinary
+          file path (e.g. name of color scheme), so we can't blindly apply the
+          same strategy (i.e. `tabedit some-color-scheme` doesn't make sense)
+- `g:fzf_colors`
+- `g:fzf_history_dir`
+
+Tips
+----
+
+### fzf inside terminal buffer
+
+On the latest versions of Vim and Neovim, fzf will start in a terminal buffer.
+If you find the default ANSI colors to be different, consider configuring the
+colors using `g:terminal_ansi_colors` in regular Vim or `g:terminal_color_x`
+in Neovim.
+
+```vim
+" Terminal colors for seoul256 color scheme
+if has('nvim')
+  let g:terminal_color_0 = '#4e4e4e'
+  let g:terminal_color_1 = '#d68787'
+  let g:terminal_color_2 = '#5f865f'
+  let g:terminal_color_3 = '#d8af5f'
+  let g:terminal_color_4 = '#85add4'
+  let g:terminal_color_5 = '#d7afaf'
+  let g:terminal_color_6 = '#87afaf'
+  let g:terminal_color_7 = '#d0d0d0'
+  let g:terminal_color_8 = '#626262'
+  let g:terminal_color_9 = '#d75f87'
+  let g:terminal_color_10 = '#87af87'
+  let g:terminal_color_11 = '#ffd787'
+  let g:terminal_color_12 = '#add4fb'
+  let g:terminal_color_13 = '#ffafaf'
+  let g:terminal_color_14 = '#87d7d7'
+  let g:terminal_color_15 = '#e4e4e4'
+else
+  let g:terminal_ansi_colors = [
+    \ '#4e4e4e', '#d68787', '#5f865f', '#d8af5f',
+    \ '#85add4', '#d7afaf', '#87afaf', '#d0d0d0',
+    \ '#626262', '#d75f87', '#87af87', '#ffd787',
+    \ '#add4fb', '#ffafaf', '#87d7d7', '#e4e4e4'
+  \ ]
+endif
+```
+
+### Starting fzf in a popup window
+
+```vim
+" Required:
+" - width [float range [0 ~ 1]] or [integer range [8 ~ ]]
+" - height [float range [0 ~ 1]] or [integer range [4 ~ ]]
+"
+" Optional:
+" - xoffset [float default 0.5 range [0 ~ 1]]
+" - yoffset [float default 0.5 range [0 ~ 1]]
+" - relative [boolean default v:false]
+" - border [string default 'rounded']: Border style
+"   - 'rounded' / 'sharp' / 'horizontal' / 'vertical' / 'top' / 'bottom' / 'left' / 'right'
+let g:fzf_layout = { 'window': { 'width': 0.9, 'height': 0.6 } }
+```
+
+Alternatively, you can make fzf open in a tmux popup window (requires tmux 3.2
+or above) by putting fzf-tmux options in `tmux` key.
+
+```vim
+" See `man fzf-tmux` for available options
+if exists('$TMUX')
+  let g:fzf_layout = { 'tmux': '-p90%,60%' }
+else
+  let g:fzf_layout = { 'window': { 'width': 0.9, 'height': 0.6 } }
+endif
+```
+
+### Hide statusline
+
+When fzf starts in a terminal buffer, the file type of the buffer is set to
+`fzf`. So you can set up `FileType fzf` autocmd to customize the settings of
+the window.
+
+For example, if you open fzf on the bottom on the screen (e.g. `{'down':
+'40%'}`), you might want to temporarily disable the statusline for a cleaner
+look.
+
+```vim
+let g:fzf_layout = { 'down': '30%' }
+autocmd! FileType fzf
+autocmd  FileType fzf set laststatus=0 noshowmode noruler
+  \| autocmd BufLeave <buffer> set laststatus=2 showmode ruler
+```
+
+[License](LICENSE)
+------------------
+
+The MIT License (MIT)
+
+Copyright (c) 2013-2024 Junegunn Choi

bin/fzf-preview.sh

@@ -0,0 +1,74 @@
+#!/usr/bin/env bash
+#
+# The purpose of this script is to demonstrate how to preview a file or an
+# image in the preview window of fzf.
+#
+# Dependencies:
+# - https://github.com/sharkdp/bat
+# - https://github.com/hpjansson/chafa
+# - https://iterm2.com/utilities/imgcat
+
+if [[ $# -ne 1 ]]; then
+  >&2 echo "usage: $0 FILENAME"
+  exit 1
+fi
+
+file=${1/#\~\//$HOME/}
+type=$(file --dereference --mime -- "$file")
+
+if [[ ! $type =~ image/ ]]; then
+  if [[ $type =~ =binary ]]; then
+    file "$1"
+    exit
+  fi
+
+  # Sometimes bat is installed as batcat.
+  if command -v batcat > /dev/null; then
+    batname="batcat"
+  elif command -v bat > /dev/null; then
+    batname="bat"
+  else
+    cat "$1"
+    exit
+  fi
+
+  ${batname} --style="${BAT_STYLE:-numbers}" --color=always --pager=never -- "$file"
+  exit
+fi
+
+dim=${FZF_PREVIEW_COLUMNS}x${FZF_PREVIEW_LINES}
+if [[ $dim = x ]]; then
+  dim=$(stty size < /dev/tty | awk '{print $2 "x" $1}')
+elif ! [[ $KITTY_WINDOW_ID ]] && (( FZF_PREVIEW_TOP + FZF_PREVIEW_LINES == $(stty size < /dev/tty | awk '{print $1}') )); then
+  # Avoid scrolling issue when the Sixel image touches the bottom of the screen
+  # * https://github.com/junegunn/fzf/issues/2544
+  dim=${FZF_PREVIEW_COLUMNS}x$((FZF_PREVIEW_LINES - 1))
+fi
+
+# 1. Use kitty icat on kitty terminal
+if [[ $KITTY_WINDOW_ID ]]; then
+  # 1. 'memory' is the fastest option but if you want the image to be scrollable,
+  #    you have to use 'stream'.
+  #
+  # 2. The last line of the output is the ANSI reset code without newline.
+  #    This confuses fzf and makes it render scroll offset indicator.
+  #    So we remove the last line and append the reset code to its previous line.
+  kitty icat --clear --transfer-mode=memory --unicode-placeholder --stdin=no --place="$dim@0x0" "$file" | sed '$d' | sed $'$s/$/\e[m/'
+
+# 2. Use chafa with Sixel output
+elif command -v chafa > /dev/null; then
+  chafa -f sixel -s "$dim" "$file"
+  # Add a new line character so that fzf can display multiple images in the preview window
+  echo
+
+# 3. If chafa is not found but imgcat is available, use it on iTerm2
+elif command -v imgcat > /dev/null; then
+  # NOTE: We should use https://iterm2.com/utilities/it2check to check if the
+  # user is running iTerm2. But for the sake of simplicity, we just assume
+  # that's the case here.
+  imgcat -W "${dim%%x*}" -H "${dim##*x}" "$file"
+
+# 4. Cannot find any suitable method to preview the image
+else
+  file "$file"
+fi

bin/fzf-tmux

@@ -1,6 +1,14 @@
 #!/usr/bin/env bash
 # fzf-tmux: starts fzf in a tmux pane
-# usage: fzf-tmux [-u|-d [HEIGHT[%]]] [-l|-r [WIDTH[%]]] [--] [FZF OPTIONS]
+# usage: fzf-tmux [LAYOUT OPTIONS] [--] [FZF OPTIONS]
+
+fail() {
+  >&2 echo "$1"
+  exit 2
+}
+
+fzf="$(command -v fzf 2> /dev/null)" || fzf="$(dirname "$0")/fzf"
+[[ -x "$fzf" ]] || fail 'fzf executable not found'
 
 args=()
 opt=""
@@ -8,20 +16,49 @@ skip=""
 swap=""
 close=""
 term=""
-[ -n "$LINES" ] && lines=$LINES || lines=$(tput lines)
-while [ $# -gt 0 ]; do
+[[ -n "$LINES" ]] && lines=$LINES || lines=$(tput lines) || lines=$(tmux display-message -p "#{pane_height}")
+[[ -n "$COLUMNS" ]] && columns=$COLUMNS || columns=$(tput cols) || columns=$(tmux display-message -p "#{pane_width}")
+
+help() {
+  >&2 echo 'usage: fzf-tmux [LAYOUT OPTIONS] [--] [FZF OPTIONS]
+
+  LAYOUT OPTIONS:
+    (default layout: -d 50%)
+
+    Popup window (requires tmux 3.2 or above):
+      -p [WIDTH[%][,HEIGHT[%]]]  (default: 50%)
+      -w WIDTH[%]
+      -h HEIGHT[%]
+      -x COL
+      -y ROW
+
+    Split pane:
+      -u [HEIGHT[%]]             Split above (up)
+      -d [HEIGHT[%]]             Split below (down)
+      -l [WIDTH[%]]              Split left
+      -r [WIDTH[%]]              Split right
+'
+  exit
+}
+
+while [[ $# -gt 0 ]]; do
   arg="$1"
-  case "$arg" in
+  shift
+  [[ -z "$skip" ]] && case "$arg" in
     -)
       term=1
       ;;
-    -w*|-h*|-d*|-u*|-r*|-l*)
-      if [ -n "$skip" ]; then
-        args+=("$1")
-        shift
-        continue
-      fi
-      if [[ "$arg" =~ ^.[lrw] ]]; then
+    --help)
+      help
+      ;;
+    --version)
+      echo "fzf-tmux (with fzf $("$fzf" --version))"
+      exit
+      ;;
+    -p*|-w*|-h*|-x*|-y*|-d*|-u*|-r*|-l*)
+      if [[ "$arg" =~ ^-[pwhxy] ]]; then
+        [[ "$opt" =~ "-E" ]] || opt="-E"
+      elif [[ "$arg" =~ ^.[lr] ]]; then
         opt="-h"
         if [[ "$arg" =~ ^.l ]]; then
           opt="$opt -d"
@@ -36,35 +73,41 @@ while [ $# -gt 0 ]; do
           close="; tmux swap-pane -D"
         fi
       fi
-      if [ ${#arg} -gt 2 ]; then
+      if [[ ${#arg} -gt 2 ]]; then
         size="${arg:2}"
       else
-        shift
-        if [[ "$1" =~ ^[0-9]+%?$ ]]; then
+        if [[ "$1" =~ ^[0-9%,]+$ ]] || [[ "$1" =~ ^[A-Z]$ ]]; then
           size="$1"
-        else
-          [ -n "$1" -a "$1" != "--" ] && args+=("$1")
           shift
+        else
           continue
         fi
       fi
 
-      if [[ "$size" =~ %$ ]]; then
+      if [[ "$arg" =~ ^-p ]]; then
+        if [[ -n "$size" ]]; then
+          w=${size%%,*}
+          h=${size##*,}
+          opt="$opt -w$w -h$h"
+        fi
+      elif [[ "$arg" =~ ^-[whxy] ]]; then
+        opt="$opt ${arg:0:2}$size"
+      elif [[ "$size" =~ %$ ]]; then
         size=${size:0:((${#size}-1))}
-        if [ -n "$swap" ]; then
+        if [[ -n "$swap" ]]; then
           opt="$opt -p $(( 100 - size ))"
         else
           opt="$opt -p $size"
         fi
       else
-        if [ -n "$swap" ]; then
+        if [[ -n "$swap" ]]; then
           if [[ "$arg" =~ ^.l ]]; then
-            [ -n "$COLUMNS" ] && max=$COLUMNS || max=$(tput cols)
+            max=$columns
           else
             max=$lines
           fi
           size=$(( max - size ))
-          [ $size -lt 0 ] && size=0
+          [[ $size -lt 0 ]] && size=0
           opt="$opt -l $size"
         else
           opt="$opt -l $size"
@@ -75,24 +118,28 @@ while [ $# -gt 0 ]; do
       # "--" can be used to separate fzf-tmux options from fzf options to
       # avoid conflicts
       skip=1
+      continue
       ;;
     *)
-      args+=("$1")
+      args+=("$arg")
       ;;
   esac
-  shift
+  [[ -n "$skip" ]] && args+=("$arg")
 done
 
-if ! [ -n "$TMUX" -a "$lines" -gt 15 ]; then
-  fzf "${args[@]}"
+if [[ -z "$TMUX" ]]; then
+  "$fzf" "${args[@]}"
   exit $?
 fi
 
-# Handle zoomed tmux pane by moving it to a temp window
-if tmux list-panes -F '#F' | grep -q Z; then
-  zoomed=1
+# --height option is not allowed. CTRL-Z is also disabled.
+args=("${args[@]}" "--no-height" "--bind=ctrl-z:ignore")
+
+# Handle zoomed tmux pane without popup options by moving it to a temp window
+if [[ ! "$opt" =~ "-E" ]] && tmux list-panes -F '#F' | grep -q Z; then
+  zoomed_without_popup=1
   original_window=$(tmux display-message -p "#{window_id}")
-  tmp_window=$(tmux new-window -d -P -F "#{window_id}" "bash -c 'while :; do for c in \\| / - \\\\; do sleep 0.2; printf \"\\r\$c fzf-tmux is running\\r\"; done; done'")
+  tmp_window=$(tmux new-window -d -P -F "#{window_id}" "bash -c 'while :; do for c in \\| / - '\\;' do sleep 0.2; printf \"\\r\$c fzf-tmux is running\\r\"; done; done'")
   tmux swap-pane -t $tmp_window \; select-window -t $tmp_window
 fi
 
@@ -104,58 +151,91 @@ argsf="${TMPDIR:-/tmp}/fzf-args-$id"
 fifo1="${TMPDIR:-/tmp}/fzf-fifo1-$id"
 fifo2="${TMPDIR:-/tmp}/fzf-fifo2-$id"
 fifo3="${TMPDIR:-/tmp}/fzf-fifo3-$id"
+if tmux_win_opts=$(tmux show-options -p remain-on-exit \; show-options -p synchronize-panes 2> /dev/null); then
+  tmux_win_opts=( $(sed '/ off/d; s/synchronize-panes/set-option -p synchronize-panes/; s/remain-on-exit/set-option -p remain-on-exit/; s/$/ \\;/' <<< "$tmux_win_opts") )
+  tmux_off_opts='; set-option -p synchronize-panes off ; set-option -p remain-on-exit off'
+else
+  tmux_win_opts=( $(tmux show-window-options remain-on-exit \; show-window-options synchronize-panes | sed '/ off/d; s/^/set-window-option /; s/$/ \\;/') )
+  tmux_off_opts='; set-window-option synchronize-panes off ; set-window-option remain-on-exit off'
+fi
 cleanup() {
-  rm -f $argsf $fifo1 $fifo2 $fifo3
+  \rm -f $argsf $fifo1 $fifo2 $fifo3
 
-  # Remove temp window if we were zoomed
-  if [ -n "$zoomed" ]; then
+  # Restore tmux window options
+  if [[ "${#tmux_win_opts[@]}" -gt 1 ]]; then
+    eval "tmux ${tmux_win_opts[*]}"
+  fi
+
+  # Remove temp window if we were zoomed without popup options
+  if [[ -n "$zoomed_without_popup" ]]; then
+    tmux display-message -p "#{window_id}" > /dev/null
     tmux swap-pane -t $original_window \; \
       select-window -t $original_window \; \
       kill-window -t $tmp_window \; \
       resize-pane -Z
   fi
+
+  if [[ $# -gt 0 ]]; then
+    trap - EXIT
+    exit 130
+  fi
 }
-trap cleanup EXIT SIGINT SIGTERM
+trap 'cleanup 1' SIGUSR1
+trap 'cleanup' EXIT
 
-fail() {
-  >&2 echo "$1"
-  exit 2
-}
-fzf="$(which fzf 2> /dev/null)" || fzf="$(dirname "$0")/fzf"
-[ -x "$fzf" ] || fail "fzf executable not found"
-
-envs="env TERM=$TERM "
-[ -n "$FZF_DEFAULT_OPTS"    ] && envs="$envs FZF_DEFAULT_OPTS=$(printf %q "$FZF_DEFAULT_OPTS")"
-[ -n "$FZF_DEFAULT_COMMAND" ] && envs="$envs FZF_DEFAULT_COMMAND=$(printf %q "$FZF_DEFAULT_COMMAND")"
-
-mkfifo -m o+w $fifo2
-mkfifo -m o+w $fifo3
+envs="export TERM=$TERM "
+if [[ "$opt" =~ "-E" ]]; then
+  tmux_version=$(tmux -V | sed 's/[^0-9.]//g')
+  if [[ $(awk '{print ($1 > 3.2)}' <<< "$tmux_version" 2> /dev/null || bc -l <<< "$tmux_version > 3.2") = 1 ]]; then
+    FZF_DEFAULT_OPTS="--border $FZF_DEFAULT_OPTS"
+    opt="-B $opt"
+  elif [[ $tmux_version = 3.2 ]]; then
+    FZF_DEFAULT_OPTS="--margin 0,1 $FZF_DEFAULT_OPTS"
+  else
+    echo "fzf-tmux: tmux 3.2 or above is required for popup mode" >&2
+    exit 2
+  fi
+fi
+[[ -n "$FZF_DEFAULT_OPTS"    ]] && envs="$envs FZF_DEFAULT_OPTS=$(printf %q "$FZF_DEFAULT_OPTS")"
+[[ -n "$FZF_DEFAULT_COMMAND" ]] && envs="$envs FZF_DEFAULT_COMMAND=$(printf %q "$FZF_DEFAULT_COMMAND")"
+[[ -n "$RUNEWIDTH_EASTASIAN" ]] && envs="$envs RUNEWIDTH_EASTASIAN=$(printf %q "$RUNEWIDTH_EASTASIAN")"
+[[ -n "$BAT_THEME" ]] && envs="$envs BAT_THEME=$(printf %q "$BAT_THEME")"
+echo "$envs;" > "$argsf"
 
 # Build arguments to fzf
-opts=""
-for arg in "${args[@]}"; do
-  arg="${arg//\\/\\\\}"
-  arg="${arg//\"/\\\"}"
-  arg="${arg//\`/\\\`}"
-  arg="${arg//$/\\$}"
-  opts="$opts \"$arg\""
-done
+opts=$(printf "%q " "${args[@]}")
 
-if [ -n "$term" -o -t 0 ]; then
-  cat <<< "\"$fzf\" $opts > $fifo2; echo \$? > $fifo3 $close" > $argsf
-  tmux set-window-option synchronize-panes off \;\
-    set-window-option remain-on-exit off \;\
-    split-window $opt "cd $(printf %q "$PWD");$envs bash $argsf" $swap \
-    > /dev/null 2>&1
+pppid=$$
+echo -n "trap 'kill -SIGUSR1 -$pppid' EXIT SIGINT SIGTERM;" >> $argsf
+close="; trap - EXIT SIGINT SIGTERM $close"
+
+export TMUX=$(cut -d , -f 1,2 <<< "$TMUX")
+mkfifo -m o+w $fifo2
+if [[ "$opt" =~ "-E" ]]; then
+  cat $fifo2 &
+  if [[ -n "$term" ]] || [[ -t 0 ]]; then
+    cat <<< "\"$fzf\" $opts > $fifo2; out=\$? $close; exit \$out" >> $argsf
+  else
+    mkfifo $fifo1
+    cat <<< "\"$fzf\" $opts < $fifo1 > $fifo2; out=\$? $close; exit \$out" >> $argsf
+    cat <&0 > $fifo1 &
+  fi
+
+  tmux popup -d "$PWD" $opt "bash $argsf" > /dev/null 2>&1
+  exit $?
+fi
+
+mkfifo -m o+w $fifo3
+if [[ -n "$term" ]] || [[ -t 0 ]]; then
+  cat <<< "\"$fzf\" $opts > $fifo2; echo \$? > $fifo3 $close" >> $argsf
 else
   mkfifo $fifo1
-  cat <<< "\"$fzf\" $opts < $fifo1 > $fifo2; echo \$? > $fifo3 $close" > $argsf
-  tmux set-window-option synchronize-panes off \;\
-    set-window-option remain-on-exit off \;\
-    split-window $opt "$envs bash $argsf" $swap \
-    > /dev/null 2>&1
+  cat <<< "\"$fzf\" $opts < $fifo1 > $fifo2; echo \$? > $fifo3 $close" >> $argsf
   cat <&0 > $fifo1 &
 fi
+tmux \
+  split-window -c "$PWD" $opt "bash -c 'exec -a fzf bash $argsf'" $swap \
+  $tmux_off_opts \
+  > /dev/null 2>&1 || { "$fzf" "${args[@]}"; exit $?; }
 cat $fifo2
 exit "$(cat $fifo3)"
-

doc/fzf.txt

@@ -0,0 +1,518 @@
+fzf.txt	fzf	Last change: January 1 2024
+FZF - TABLE OF CONTENTS                                            *fzf* *fzf-toc*
+==============================================================================
+
+  FZF Vim integration                       |fzf-vim-integration|
+    Installation                            |fzf-installation|
+    Summary                                 |fzf-summary|
+    :FZF[!]                                 |:FZF|
+      Configuration                         |fzf-configuration|
+        Examples                            |fzf-examples|
+          Explanation of g:fzf_colors       |fzf-explanation-of-gfzfcolors|
+    fzf#run                                 |fzf#run|
+    fzf#wrap                                |fzf#wrap|
+      Global options supported by fzf#wrap  |fzf-global-options-supported-by-fzf#wrap|
+    Tips                                    |fzf-tips|
+      fzf inside terminal buffer            |fzf-inside-terminal-buffer|
+      Starting fzf in a popup window        |fzf-starting-fzf-in-a-popup-window|
+      Hide statusline                       |fzf-hide-statusline|
+    License                                 |fzf-license|
+
+FZF VIM INTEGRATION                                        *fzf-vim-integration*
+==============================================================================
+
+
+INSTALLATION                                                  *fzf-installation*
+==============================================================================
+
+Once you have fzf installed, you can enable it inside Vim simply by adding the
+directory to 'runtimepath' in your Vim configuration file. The path may differ
+depending on the package manager.
+>
+    " If installed using Homebrew
+    set rtp+=/usr/local/opt/fzf
+
+    " If installed using Homebrew on Apple Silicon
+    set rtp+=/opt/homebrew/opt/fzf
+
+    " If you have cloned fzf on ~/.fzf directory
+    set rtp+=~/.fzf
+<
+If you use {vim-plug}{1}, the same can be written as:
+>
+    " If installed using Homebrew
+    Plug '/usr/local/opt/fzf'
+
+    " If installed using Homebrew on Apple Silicon
+    Plug '/opt/homebrew/opt/fzf'
+
+    " If you have cloned fzf on ~/.fzf directory
+    Plug '~/.fzf'
+<
+But if you want the latest Vim plugin file from GitHub rather than the one
+included in the package, write:
+>
+    Plug 'junegunn/fzf'
+<
+The Vim plugin will pick up fzf binary available on the system. If fzf is not
+found on `$PATH`, it will ask you if it should download the latest binary for
+you.
+
+To make sure that you have the latest version of the binary, set up
+post-update hook like so:
+
+                                                                   *fzf#install*
+>
+    Plug 'junegunn/fzf', { 'do': { -> fzf#install() } }
+<
+                                      {1} https://github.com/junegunn/vim-plug
+
+
+SUMMARY                                                            *fzf-summary*
+==============================================================================
+
+The Vim plugin of fzf provides two core functions, and `:FZF` command which is
+the basic file selector command built on top of them.
+
+ 1. `fzf#run([spec dict])`
+   - Starts fzf inside Vim with the given spec
+   - `:call fzf#run({'source': 'ls'})`
+ 2. `fzf#wrap([spec dict]) -> (dict)`
+   - Takes a spec for `fzf#run` and returns an extended version of it with
+     additional options for addressing global preferences (`g:fzf_xxx`)
+     - `:echo fzf#wrap({'source': 'ls'})`
+   - We usually wrap a spec with `fzf#wrap` before passing it to `fzf#run`
+     - `:call fzf#run(fzf#wrap({'source': 'ls'}))`
+ 3. `:FZF [fzf_options string] [path string]`
+   - Basic fuzzy file selector
+   - A reference implementation for those who don't want to write VimScript to
+     implement custom commands
+   - If you're looking for more such commands, check out {fzf.vim}{2} project.
+
+The most important of all is `fzf#run`, but it would be easier to understand
+the whole if we start off with `:FZF` command.
+
+                                       {2} https://github.com/junegunn/fzf.vim
+
+
+:FZF[!]
+==============================================================================
+
+                                                                          *:FZF*
+>
+    " Look for files under current directory
+    :FZF
+
+    " Look for files under your home directory
+    :FZF ~
+
+    " With fzf command-line options
+    :FZF --reverse --info=inline /tmp
+
+    " Bang version starts fzf in fullscreen mode
+    :FZF!
+<
+Similarly to {ctrlp.vim}{3}, use enter key, CTRL-T, CTRL-X or CTRL-V to open
+selected files in the current window, in new tabs, in horizontal splits, or in
+vertical splits respectively.
+
+Note that the environment variables `FZF_DEFAULT_COMMAND` and
+`FZF_DEFAULT_OPTS` also apply here.
+
+                                         {3} https://github.com/kien/ctrlp.vim
+
+
+< Configuration >_____________________________________________________________~
+                                                             *fzf-configuration*
+
+                      *g:fzf_action* *g:fzf_layout* *g:fzf_colors* *g:fzf_history_dir*
+
+ - `g:fzf_action`
+   - Customizable extra key bindings for opening selected files in different
+     ways
+ - `g:fzf_layout`
+   - Determines the size and position of fzf window
+ - `g:fzf_colors`
+   - Customizes fzf colors to match the current color scheme
+ - `g:fzf_history_dir`
+   - Enables history feature
+
+
+Examples~
+                                                                  *fzf-examples*
+>
+    " This is the default extra key bindings
+    let g:fzf_action = {
+      \ 'ctrl-t': 'tab split',
+      \ 'ctrl-x': 'split',
+      \ 'ctrl-v': 'vsplit' }
+
+    " An action can be a reference to a function that processes selected lines
+    function! s:build_quickfix_list(lines)
+      call setqflist(map(copy(a:lines), '{ "filename": v:val, "lnum": 1 }'))
+      copen
+      cc
+    endfunction
+
+    let g:fzf_action = {
+      \ 'ctrl-q': function('s:build_quickfix_list'),
+      \ 'ctrl-t': 'tab split',
+      \ 'ctrl-x': 'split',
+      \ 'ctrl-v': 'vsplit' }
+
+    " Default fzf layout
+    " - Popup window (center of the screen)
+    let g:fzf_layout = { 'window': { 'width': 0.9, 'height': 0.6 } }
+
+    " - Popup window (center of the current window)
+    let g:fzf_layout = { 'window': { 'width': 0.9, 'height': 0.6, 'relative': v:true } }
+
+    " - Popup window (anchored to the bottom of the current window)
+    let g:fzf_layout = { 'window': { 'width': 0.9, 'height': 0.6, 'relative': v:true, 'yoffset': 1.0 } }
+
+    " - down / up / left / right
+    let g:fzf_layout = { 'down': '40%' }
+
+    " - Window using a Vim command
+    let g:fzf_layout = { 'window': 'enew' }
+    let g:fzf_layout = { 'window': '-tabnew' }
+    let g:fzf_layout = { 'window': '10new' }
+
+    " Customize fzf colors to match your color scheme
+    " - fzf#wrap translates this to a set of `--color` options
+    let g:fzf_colors =
+    \ { 'fg':      ['fg', 'Normal'],
+      \ 'bg':      ['bg', 'Normal'],
+      \ 'hl':      ['fg', 'Comment'],
+      \ 'fg+':     ['fg', 'CursorLine', 'CursorColumn', 'Normal'],
+      \ 'bg+':     ['bg', 'CursorLine', 'CursorColumn'],
+      \ 'hl+':     ['fg', 'Statement'],
+      \ 'info':    ['fg', 'PreProc'],
+      \ 'border':  ['fg', 'Ignore'],
+      \ 'prompt':  ['fg', 'Conditional'],
+      \ 'pointer': ['fg', 'Exception'],
+      \ 'marker':  ['fg', 'Keyword'],
+      \ 'spinner': ['fg', 'Label'],
+      \ 'header':  ['fg', 'Comment'] }
+
+    " Enable per-command history
+    " - History files will be stored in the specified directory
+    " - When set, CTRL-N and CTRL-P will be bound to 'next-history' and
+    "   'previous-history' instead of 'down' and 'up'.
+    let g:fzf_history_dir = '~/.local/share/fzf-history'
+<
+
+Explanation of g:fzf_colors~
+                                                 *fzf-explanation-of-gfzfcolors*
+
+`g:fzf_colors` is a dictionary mapping fzf elements to a color specification
+list:
+>
+    element: [ component, group1 [, group2, ...] ]
+<
+ - `element` is an fzf element to apply a color to:
+
+ ----------------------------+------------------------------------------------------
+ Element                     | Description                                          ~
+ ----------------------------+------------------------------------------------------
+  `fg`   /  `bg`   /  `hl`         | Item (foreground / background / highlight)
+  `fg+`  /  `bg+`  /  `hl+`        | Current item (foreground / background / highlight)
+  `preview-fg`  /  `preview-bg`  | Preview window text and background
+  `hl`   /  `hl+`                | Highlighted substrings (normal / current)
+  `gutter`                     | Background of the gutter on the left
+  `pointer`                    | Pointer to the current line ( `>` )
+  `marker`                     | Multi-select marker ( `>` )
+  `border`                     | Border around the window ( `--border`  and  `--preview` )
+  `header`                     | Header ( `--header`  or  `--header-lines` )
+  `info`                       | Info line (match counters)
+  `spinner`                    | Streaming input indicator
+  `query`                      | Query string
+  `disabled`                   | Query string when search is disabled
+  `prompt`                     | Prompt before query ( `> ` )
+  `pointer`                    | Pointer to the current line ( `>` )
+ ----------------------------+------------------------------------------------------
+ - `component` specifies the component (`fg` / `bg`) from which to extract the
+   color when considering each of the following highlight groups
+ - `group1 [, group2, ...]` is a list of highlight groups that are searched (in
+   order) for a matching color definition
+
+For example, consider the following specification:
+>
+      'prompt':  ['fg', 'Conditional', 'Comment'],
+<
+This means we color the prompt - using the `fg` attribute of the `Conditional`
+if it exists, - otherwise use the `fg` attribute of the `Comment` highlight
+group if it exists, - otherwise fall back to the default color settings for
+the prompt.
+
+You can examine the color option generated according the setting by printing
+the result of `fzf#wrap()` function like so:
+>
+    :echo fzf#wrap()
+<
+
+FZF#RUN
+==============================================================================
+
+                                                                       *fzf#run*
+
+`fzf#run()` function is the core of Vim integration. It takes a single
+dictionary argument, a spec, and starts fzf process accordingly. At the very
+least, specify `sink` option to tell what it should do with the selected
+entry.
+>
+    call fzf#run({'sink': 'e'})
+<
+We haven't specified the `source`, so this is equivalent to starting fzf on
+command line without standard input pipe; fzf will use find command (or
+`$FZF_DEFAULT_COMMAND` if defined) to list the files under the current
+directory. When you select one, it will open it with the sink, `:e` command.
+If you want to open it in a new tab, you can pass `:tabedit` command instead
+as the sink.
+>
+    call fzf#run({'sink': 'tabedit'})
+<
+Instead of using the default find command, you can use any shell command as
+the source. The following example will list the files managed by git. It's
+equivalent to running `git ls-files | fzf` on shell.
+>
+    call fzf#run({'source': 'git ls-files', 'sink': 'e'})
+<
+fzf options can be specified as `options` entry in spec dictionary.
+>
+    call fzf#run({'sink': 'tabedit', 'options': '--multi --reverse'})
+<
+You can also pass a layout option if you don't want fzf window to take up the
+entire screen.
+>
+    " up / down / left / right / window are allowed
+    call fzf#run({'source': 'git ls-files', 'sink': 'e', 'left': '40%'})
+    call fzf#run({'source': 'git ls-files', 'sink': 'e', 'window': '30vnew'})
+<
+`source` doesn't have to be an external shell command, you can pass a Vim
+array as the source. In the next example, we pass the names of color schemes
+as the source to implement a color scheme selector.
+>
+    call fzf#run({'source': map(split(globpath(&rtp, 'colors/*.vim')),
+                \               'fnamemodify(v:val, ":t:r")'),
+                \ 'sink': 'colo', 'left': '25%'})
+<
+The following table summarizes the available options.
+
+ ---------------------------+---------------+----------------------------------------------------------------------
+ Option name                | Type          | Description                                                          ~
+ ---------------------------+---------------+----------------------------------------------------------------------
+  `source`                    | string        | External command to generate input to fzf (e.g.  `find .` )
+  `source`                    | list          | Vim list as input to fzf
+  `sink`                      | string        | Vim command to handle the selected item (e.g.  `e` ,  `tabe` )
+  `sink`                      | funcref       | Reference to function to process each selected item
+  `sinklist`  (or  `sink*` )    | funcref       | Similar to  `sink` , but takes the list of output lines at once
+  `options`                   | string/list   | Options to fzf
+  `dir`                       | string        | Working directory
+  `up` / `down` / `left` / `right`  | number/string | (Layout) Window position and size (e.g.  `20` ,  `50%` )
+  `tmux`                      | string        | (Layout) fzf-tmux options (e.g.  `-p90%,60%` )
+  `window`  (Vim 8 / Neovim)  | string        | (Layout) Command to open fzf window (e.g.  `vertical aboveleft 30new` )
+  `window`  (Vim 8 / Neovim)  | dict          | (Layout) Popup window settings (e.g.  `{'width': 0.9, 'height': 0.6}` )
+ ---------------------------+---------------+----------------------------------------------------------------------
+
+`options` entry can be either a string or a list. For simple cases, string
+should suffice, but prefer to use list type to avoid escaping issues.
+>
+    call fzf#run({'options': '--reverse --prompt "C:\\Program Files\\"'})
+    call fzf#run({'options': ['--reverse', '--prompt', 'C:\Program Files\']})
+<
+When `window` entry is a dictionary, fzf will start in a popup window. The
+following options are allowed:
+
+ - Required:
+   - `width` [float range [0 ~ 1]] or [integer range [8 ~ ]]
+   - `height` [float range [0 ~ 1]] or [integer range [4 ~ ]]
+ - Optional:
+   - `yoffset` [float default 0.5 range [0 ~ 1]]
+   - `xoffset` [float default 0.5 range [0 ~ 1]]
+   - `relative` [boolean default v:false]
+   - `border` [string default `rounded` (`sharp` on Windows)]: Border style
+     - `rounded` / `sharp` / `horizontal` / `vertical` / `top` / `bottom` / `left` / `right` / `no[ne]`
+
+
+FZF#WRAP
+==============================================================================
+
+                                                                      *fzf#wrap*
+
+We have seen that several aspects of `:FZF` command can be configured with a
+set of global option variables; different ways to open files (`g:fzf_action`),
+window position and size (`g:fzf_layout`), color palette (`g:fzf_colors`),
+etc.
+
+So how can we make our custom `fzf#run` calls also respect those variables?
+Simply by "wrapping" the spec dictionary with `fzf#wrap` before passing it to
+`fzf#run`.
+
+ - `fzf#wrap([name string], [spec dict], [fullscreen bool]) -> (dict)`
+   - All arguments are optional. Usually we only need to pass a spec
+     dictionary.
+   - `name` is for managing history files. It is ignored if `g:fzf_history_dir`
+     is not defined.
+   - `fullscreen` can be either `0` or `1` (default: 0).
+
+`fzf#wrap` takes a spec and returns an extended version of it (also a
+dictionary) with additional options for addressing global preferences. You can
+examine the return value of it like so:
+>
+    echo fzf#wrap({'source': 'ls'})
+<
+After we "wrap" our spec, we pass it to `fzf#run`.
+>
+    call fzf#run(fzf#wrap({'source': 'ls'}))
+<
+Now it supports CTRL-T, CTRL-V, and CTRL-X key bindings (configurable via
+`g:fzf_action`) and it opens fzf window according to `g:fzf_layout` setting.
+
+To make it easier to use, let's define `LS` command.
+>
+    command! LS call fzf#run(fzf#wrap({'source': 'ls'}))
+<
+Type `:LS` and see how it works.
+
+We would like to make `:LS!` (bang version) open fzf in fullscreen, just like
+`:FZF!`. Add `-bang` to command definition, and use <bang> value to set the
+last `fullscreen` argument of `fzf#wrap` (see :help <bang>).
+>
+    " On :LS!, <bang> evaluates to '!', and '!0' becomes 1
+    command! -bang LS call fzf#run(fzf#wrap({'source': 'ls'}, <bang>0))
+<
+Our `:LS` command will be much more useful if we can pass a directory argument
+to it, so that something like `:LS /tmp` is possible.
+>
+    command! -bang -complete=dir -nargs=? LS
+        \ call fzf#run(fzf#wrap({'source': 'ls', 'dir': <q-args>}, <bang>0))
+<
+Lastly, if you have enabled `g:fzf_history_dir`, you might want to assign a
+unique name to our command and pass it as the first argument to `fzf#wrap`.
+>
+    " The query history for this command will be stored as 'ls' inside g:fzf_history_dir.
+    " The name is ignored if g:fzf_history_dir is not defined.
+    command! -bang -complete=dir -nargs=? LS
+        \ call fzf#run(fzf#wrap('ls', {'source': 'ls', 'dir': <q-args>}, <bang>0))
+<
+
+< Global options supported by fzf#wrap >______________________________________~
+                                      *fzf-global-options-supported-by-fzf#wrap*
+
+ - `g:fzf_layout`
+ - `g:fzf_action`
+   - Works only when no custom `sink` (or `sinklist`) is provided
+     - Having custom sink usually means that each entry is not an ordinary
+       file path (e.g. name of color scheme), so we can't blindly apply the
+       same strategy (i.e. `tabedit some-color-scheme` doesn't make sense)
+ - `g:fzf_colors`
+ - `g:fzf_history_dir`
+
+
+TIPS                                                                  *fzf-tips*
+==============================================================================
+
+
+< fzf inside terminal buffer >________________________________________________~
+                                                    *fzf-inside-terminal-buffer*
+
+The latest versions of Vim and Neovim include builtin terminal emulator
+(`:terminal`) and fzf will start in a terminal buffer in the following cases:
+
+ - On Neovim
+ - On GVim
+ - On Terminal Vim with a non-default layout
+   - `call fzf#run({'left': '30%'})` or `let g:fzf_layout = {'left': '30%'}`
+
+On the latest versions of Vim and Neovim, fzf will start in a terminal buffer.
+If you find the default ANSI colors to be different, consider configuring the
+colors using `g:terminal_ansi_colors` in regular Vim or `g:terminal_color_x`
+in Neovim.
+
+                   *g:terminal_color_15* *g:terminal_color_14* *g:terminal_color_13*
+*g:terminal_color_12* *g:terminal_color_11* *g:terminal_color_10* *g:terminal_color_9*
+   *g:terminal_color_8* *g:terminal_color_7* *g:terminal_color_6* *g:terminal_color_5*
+   *g:terminal_color_4* *g:terminal_color_3* *g:terminal_color_2* *g:terminal_color_1*
+                                                            *g:terminal_color_0*
+>
+    " Terminal colors for seoul256 color scheme
+    if has('nvim')
+      let g:terminal_color_0 = '#4e4e4e'
+      let g:terminal_color_1 = '#d68787'
+      let g:terminal_color_2 = '#5f865f'
+      let g:terminal_color_3 = '#d8af5f'
+      let g:terminal_color_4 = '#85add4'
+      let g:terminal_color_5 = '#d7afaf'
+      let g:terminal_color_6 = '#87afaf'
+      let g:terminal_color_7 = '#d0d0d0'
+      let g:terminal_color_8 = '#626262'
+      let g:terminal_color_9 = '#d75f87'
+      let g:terminal_color_10 = '#87af87'
+      let g:terminal_color_11 = '#ffd787'
+      let g:terminal_color_12 = '#add4fb'
+      let g:terminal_color_13 = '#ffafaf'
+      let g:terminal_color_14 = '#87d7d7'
+      let g:terminal_color_15 = '#e4e4e4'
+    else
+      let g:terminal_ansi_colors = [
+        \ '#4e4e4e', '#d68787', '#5f865f', '#d8af5f',
+        \ '#85add4', '#d7afaf', '#87afaf', '#d0d0d0',
+        \ '#626262', '#d75f87', '#87af87', '#ffd787',
+        \ '#add4fb', '#ffafaf', '#87d7d7', '#e4e4e4'
+      \ ]
+    endif
+<
+
+< Starting fzf in a popup window >____________________________________________~
+                                            *fzf-starting-fzf-in-a-popup-window*
+>
+    " Required:
+    " - width [float range [0 ~ 1]] or [integer range [8 ~ ]]
+    " - height [float range [0 ~ 1]] or [integer range [4 ~ ]]
+    "
+    " Optional:
+    " - xoffset [float default 0.5 range [0 ~ 1]]
+    " - yoffset [float default 0.5 range [0 ~ 1]]
+    " - relative [boolean default v:false]
+    " - border [string default 'rounded']: Border style
+    "   - 'rounded' / 'sharp' / 'horizontal' / 'vertical' / 'top' / 'bottom' / 'left' / 'right'
+    let g:fzf_layout = { 'window': { 'width': 0.9, 'height': 0.6 } }
+<
+Alternatively, you can make fzf open in a tmux popup window (requires tmux 3.2
+or above) by putting fzf-tmux options in `tmux` key.
+>
+    " See `man fzf-tmux` for available options
+    if exists('$TMUX')
+      let g:fzf_layout = { 'tmux': '-p90%,60%' }
+    else
+      let g:fzf_layout = { 'window': { 'width': 0.9, 'height': 0.6 } }
+    endif
+<
+
+< Hide statusline >___________________________________________________________~
+                                                           *fzf-hide-statusline*
+
+When fzf starts in a terminal buffer, the file type of the buffer is set to
+`fzf`. So you can set up `FileType fzf` autocmd to customize the settings of
+the window.
+
+For example, if you open fzf on the bottom on the screen (e.g. `{'down':
+'40%'}`), you might want to temporarily disable the statusline for a cleaner
+look.
+>
+    let g:fzf_layout = { 'down': '30%' }
+    autocmd! FileType fzf
+    autocmd  FileType fzf set laststatus=0 noshowmode noruler
+      \| autocmd BufLeave <buffer> set laststatus=2 showmode ruler
+<
+
+LICENSE                                                            *fzf-license*
+==============================================================================
+
+The MIT License (MIT)
+
+Copyright (c) 2013-2024 Junegunn Choi
+
+==============================================================================
+vim:tw=78:sw=2:ts=2:ft=help:norl:nowrap:

go.mod

@@ -0,0 +1,22 @@
+module github.com/junegunn/fzf
+
+require (
+	github.com/gdamore/tcell/v2 v2.5.4
+	github.com/junegunn/uniseg v0.0.0-20240120174029-b504da4f6ed2
+	github.com/mattn/go-isatty v0.0.17
+	github.com/mattn/go-shellwords v1.0.12
+	github.com/saracen/walker v0.1.3
+	golang.org/x/sys v0.16.0
+	golang.org/x/term v0.16.0
+)
+
+require (
+	github.com/gdamore/encoding v1.0.0 // indirect
+	github.com/lucasb-eyer/go-colorful v1.2.0 // indirect
+	github.com/mattn/go-runewidth v0.0.14 // indirect
+	github.com/rivo/uniseg v0.4.4 // indirect
+	golang.org/x/sync v0.5.0 // indirect
+	golang.org/x/text v0.5.0 // indirect
+)
+
+go 1.17

go.sum

@@ -0,0 +1,52 @@
+github.com/gdamore/encoding v1.0.0 h1:+7OoQ1Bc6eTm5niUzBa0Ctsh6JbMW6Ra+YNuAtDBdko=
+github.com/gdamore/encoding v1.0.0/go.mod h1:alR0ol34c49FCSBLjhosxzcPHQbf2trDkoo5dl+VrEg=
+github.com/gdamore/tcell/v2 v2.5.4 h1:TGU4tSjD3sCL788vFNeJnTdzpNKIw1H5dgLnJRQVv/k=
+github.com/gdamore/tcell/v2 v2.5.4/go.mod h1:dZgRy5v4iMobMEcWNYBtREnDZAT9DYmfqIkrgEMxLyw=
+github.com/junegunn/uniseg v0.0.0-20240120174029-b504da4f6ed2 h1:oEwPBh29BPu1MaTsz2dM9bDrkOgKBoYFC0u6uY2izWo=
+github.com/junegunn/uniseg v0.0.0-20240120174029-b504da4f6ed2/go.mod h1:ywqF55XaSE3/uS2tkJqVFKiE0oIYAXRvU2N7DU4y3XQ=
+github.com/lucasb-eyer/go-colorful v1.2.0 h1:1nnpGOrhyZZuNyfu1QjKiUICQ74+3FNCN69Aj6K7nkY=
+github.com/lucasb-eyer/go-colorful v1.2.0/go.mod h1:R4dSotOR9KMtayYi1e77YzuveK+i7ruzyGqttikkLy0=
+github.com/mattn/go-isatty v0.0.17 h1:BTarxUcIeDqL27Mc+vyvdWYSL28zpIhv3RoTdsLMPng=
+github.com/mattn/go-isatty v0.0.17/go.mod h1:kYGgaQfpe5nmfYZH+SKPsOc2e4SrIfOl2e/yFXSvRLM=
+github.com/mattn/go-runewidth v0.0.14 h1:+xnbZSEeDbOIg5/mE6JF0w6n9duR1l3/WmbinWVwUuU=
+github.com/mattn/go-runewidth v0.0.14/go.mod h1:Jdepj2loyihRzMpdS35Xk/zdY8IAYHsh153qUoGf23w=
+github.com/mattn/go-shellwords v1.0.12 h1:M2zGm7EW6UQJvDeQxo4T51eKPurbeFbe8WtebGE2xrk=
+github.com/mattn/go-shellwords v1.0.12/go.mod h1:EZzvwXDESEeg03EKmM+RmDnNOPKG4lLtQsUlTZDWQ8Y=
+github.com/rivo/uniseg v0.2.0/go.mod h1:J6wj4VEh+S6ZtnVlnTBMWIodfgj8LQOQFoIToxlJtxc=
+github.com/rivo/uniseg v0.4.4 h1:8TfxU8dW6PdqD27gjM8MVNuicgxIjxpm4K7x4jp8sis=
+github.com/rivo/uniseg v0.4.4/go.mod h1:FN3SvrM+Zdj16jyLfmOkMNblXMcoc8DfTHruCPUcx88=
+github.com/saracen/walker v0.1.3 h1:YtcKKmpRPy6XJTHJ75J2QYXXZYWnZNQxPCVqZSHVV/g=
+github.com/saracen/walker v0.1.3/go.mod h1:FU+7qU8DeQQgSZDmmThMJi93kPkLFgy0oVAcLxurjIk=
+github.com/yuin/goldmark v1.4.13/go.mod h1:6yULJ656Px+3vBD8DxQVa3kxgyrAnzto9xy5taEt/CY=
+golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
+golang.org/x/crypto v0.0.0-20210921155107-089bfa567519/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
+golang.org/x/mod v0.6.0-dev.0.20220419223038-86c51ed26bb4/go.mod h1:jJ57K6gSWd91VN4djpZkiMVwK6gcyfeH4XE8wZrZaV4=
+golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
+golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
+golang.org/x/net v0.0.0-20220722155237-a158d28d115b/go.mod h1:XRhObCWvk6IyKnWLug+ECip1KBveYUHfp+8e9klMJ9c=
+golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.0.0-20220601150217-0de741cfad7f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.0.0-20220722155255-886fb9371eb4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.5.0 h1:60k92dhOjHxJkrqnwsfl8KuaHbn/5dl0lUPUklKo3qE=
+golang.org/x/sync v0.5.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
+golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20220520151302-bc2c85ada10a/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20220722155257-8c9f86f7a55f/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20220811171246-fbc7d0a398ab/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.16.0 h1:xWw16ngr6ZMtmxDyKyIgsE93KNKz5HKmMa3b8ALHidU=
+golang.org/x/sys v0.16.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
+golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
+golang.org/x/term v0.16.0 h1:m+B6fahuftsE9qjo0VWp2FW0mB3MTJvR0BaMQrq0pmE=
+golang.org/x/term v0.16.0/go.mod h1:yn7UURbUtPyrVJPGPq404EukNFxcm/foM+bV/bfcDsY=
+golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
+golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
+golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
+golang.org/x/text v0.5.0 h1:OLmvp0KP+FVG99Ct/qFiL/Fhk4zp4QQnZ7b2U+5piUM=
+golang.org/x/text v0.5.0/go.mod h1:mrYo+phRRbMaCq/xk9113O4dZlRixOauAjOtrjsXDZ8=
+golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
+golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
+golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc=
+golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=

install

@@ -2,13 +2,14 @@
 
 set -u
 
-[[ "$@" =~ --pre ]] && version=0.13.2 pre=1 ||
-                       version=0.13.2 pre=0
-
+version=0.46.0
 auto_completion=
 key_bindings=
 update_config=2
-binary_arch=
+shells="bash zsh fish"
+prefix='~/.fzf'
+prefix_expand=~/.fzf
+fish_dir=${XDG_CONFIG_HOME:-$HOME/.config}/fish
 
 help() {
   cat << EOF
@@ -18,12 +19,14 @@ usage: $0 [OPTIONS]
     --bin                Download fzf binary only; Do not generate ~/.fzf.{bash,zsh}
     --all                Download fzf binary and update configuration files
                          to enable key bindings and fuzzy completion
+    --xdg                Generate files under \$XDG_CONFIG_HOME/fzf
     --[no-]key-bindings  Enable/disable key bindings (CTRL-T, CTRL-R, ALT-C)
     --[no-]completion    Enable/disable fuzzy completion (bash & zsh)
     --[no-]update-rc     Whether or not to update shell configuration files
 
-    --32                 Download 32-bit binary
-    --64                 Download 64-bit binary
+    --no-bash            Do not set up bash configuration
+    --no-zsh             Do not set up zsh configuration
+    --no-fish            Do not set up fish configuration
 EOF
 }
 
@@ -38,15 +41,21 @@ for opt in "$@"; do
       key_bindings=1
       update_config=1
       ;;
+    --xdg)
+      prefix='"${XDG_CONFIG_HOME:-$HOME/.config}"/fzf/fzf'
+      prefix_expand=${XDG_CONFIG_HOME:-$HOME/.config}/fzf/fzf
+      mkdir -p "${XDG_CONFIG_HOME:-$HOME/.config}/fzf"
+      ;;
     --key-bindings)    key_bindings=1    ;;
     --no-key-bindings) key_bindings=0    ;;
     --completion)      auto_completion=1 ;;
     --no-completion)   auto_completion=0 ;;
     --update-rc)       update_config=1   ;;
     --no-update-rc)    update_config=0   ;;
-    --32)              binary_arch=386   ;;
-    --64)              binary_arch=amd64 ;;
-    --bin|--pre)       ;;
+    --bin)             ;;
+    --no-bash)         shells=${shells/bash/} ;;
+    --no-zsh)          shells=${shells/zsh/} ;;
+    --no-fish)         shells=${shells/fish/} ;;
     *)
       echo "unknown option: $opt"
       help
@@ -56,17 +65,19 @@ for opt in "$@"; do
 done
 
 cd "$(dirname "${BASH_SOURCE[0]}")"
-fzf_base="$(pwd)"
+fzf_base=$(pwd)
+fzf_base_esc=$(printf %q "$fzf_base")
 
 ask() {
-  # If stdin is a tty, we are "interactive".
-  # non-interactive shell: wait for a linefeed
-  #     interactive shell: continue after a single keypress
-  read_n=$([ -t 0 ] && echo "-n 1")
-
-  read -p "$1 ([y]/n) " $read_n -r
-  echo
-  [[ $REPLY =~ ^[Nn]$ ]]
+  while true; do
+    read -p "$1 ([y]/n) " -r
+    REPLY=${REPLY:-"y"}
+    if [[ $REPLY =~ ^[Yy]$ ]]; then
+      return 1
+    elif [[ $REPLY =~ ^[Nn]$ ]]; then
+      return 0
+    fi
+  done
 }
 
 check_binary() {
@@ -76,73 +87,80 @@ check_binary() {
   if [ $? -ne 0 ]; then
     echo "Error: $output"
     binary_error="Invalid binary"
-  elif [ "$version" != "$output" ]; then
-    echo "$output != $version"
-    binary_error="Invalid version"
   else
-    echo "$output"
-    binary_error=""
-    return 0
+    output=${output/ */}
+    if [ "$version" != "$output" ]; then
+      echo "$output != $version"
+      binary_error="Invalid version"
+    else
+      echo "$output"
+      binary_error=""
+      return 0
+    fi
   fi
   rm -f "$fzf_base"/bin/fzf
   return 1
 }
 
-symlink() {
-  echo "  - Creating symlink: bin/$1 -> bin/fzf"
-  (cd "$fzf_base"/bin &&
-   rm -f fzf &&
-   ln -sf $1 fzf)
-  if [ $? -ne 0 ]; then
-    binary_error="Failed to create symlink"
-    return 1
-  fi
-}
-
 link_fzf_in_path() {
   if which_fzf="$(command -v fzf)"; then
     echo "  - Found in \$PATH"
-    echo "  - Creating symlink: $which_fzf -> bin/fzf"
+    echo "  - Creating symlink: bin/fzf -> $which_fzf"
     (cd "$fzf_base"/bin && rm -f fzf && ln -sf "$which_fzf" fzf)
     check_binary && return
   fi
   return 1
 }
 
+try_curl() {
+  command -v curl > /dev/null &&
+  if [[ $1 =~ tar.gz$ ]]; then
+    curl -fL $1 | tar -xzf -
+  else
+    local temp=${TMPDIR:-/tmp}/fzf.zip
+    curl -fLo "$temp" $1 && unzip -o "$temp" && rm -f "$temp"
+  fi
+}
+
+try_wget() {
+  command -v wget > /dev/null &&
+  if [[ $1 =~ tar.gz$ ]]; then
+    wget -O - $1 | tar -xzf -
+  else
+    local temp=${TMPDIR:-/tmp}/fzf.zip
+    wget -O "$temp" $1 && unzip -o "$temp" && rm -f "$temp"
+  fi
+}
+
 download() {
   echo "Downloading bin/fzf ..."
-  if [ $pre = 0 ]; then
-    if [ -x "$fzf_base"/bin/fzf ]; then
-      echo "  - Already exists"
-      check_binary && return
-    fi
-    if [ -x "$fzf_base"/bin/$1 ]; then
-      symlink $1 && check_binary && return
-    fi
-    link_fzf_in_path && return
+  if [ -x "$fzf_base"/bin/fzf ]; then
+    echo "  - Already exists"
+    check_binary && return
   fi
+  link_fzf_in_path && return
   mkdir -p "$fzf_base"/bin && cd "$fzf_base"/bin
   if [ $? -ne 0 ]; then
     binary_error="Failed to create bin directory"
     return
   fi
 
-  local url=https://github.com/junegunn/fzf-bin/releases/download/$version/${1}.tgz
-  if command -v curl > /dev/null; then
-    curl -fL $url | tar -xz
-  elif command -v wget > /dev/null; then
-    wget -O - $url | tar -xz
-  else
-    binary_error="curl or wget not found"
+  local url
+  url=https://github.com/junegunn/fzf/releases/download/$version/${1}
+  set -o pipefail
+  if ! (try_curl $url || try_wget $url); then
+    set +o pipefail
+    binary_error="Failed to download with curl and wget"
     return
   fi
+  set +o pipefail
 
-  if [ ! -f $1 ]; then
+  if [ ! -f fzf ]; then
     binary_error="Failed to download ${1}"
     return
   fi
 
-  chmod +x $1 && symlink $1 && check_binary
+  chmod +x fzf && check_binary
 }
 
 # Try to download binary executable
@@ -150,110 +168,65 @@ archi=$(uname -sm)
 binary_available=1
 binary_error=""
 case "$archi" in
-  Darwin\ x86_64) download fzf-$version-darwin_${binary_arch:-amd64} ;;
-  Darwin\ i*86)   download fzf-$version-darwin_${binary_arch:-386}   ;;
-  Linux\ x86_64)  download fzf-$version-linux_${binary_arch:-amd64}  ;;
-  Linux\ i*86)    download fzf-$version-linux_${binary_arch:-386}    ;;
-  *)              binary_available=0 binary_error=1  ;;
+  Darwin\ arm64)      download fzf-$version-darwin_arm64.zip     ;;
+  Darwin\ x86_64)     download fzf-$version-darwin_amd64.zip     ;;
+  Linux\ armv5*)      download fzf-$version-linux_armv5.tar.gz   ;;
+  Linux\ armv6*)      download fzf-$version-linux_armv6.tar.gz   ;;
+  Linux\ armv7*)      download fzf-$version-linux_armv7.tar.gz   ;;
+  Linux\ armv8*)      download fzf-$version-linux_arm64.tar.gz   ;;
+  Linux\ aarch64*)    download fzf-$version-linux_arm64.tar.gz   ;;
+  Linux\ loongarch64) download fzf-$version-linux_loong64.tar.gz ;;
+  Linux\ ppc64le)     download fzf-$version-linux_ppc64le.tar.gz ;;
+  Linux\ *64)         download fzf-$version-linux_amd64.tar.gz   ;;
+  Linux\ s390x)       download fzf-$version-linux_s390x.tar.gz   ;;
+  FreeBSD\ *64)       download fzf-$version-freebsd_amd64.tar.gz ;;
+  OpenBSD\ *64)       download fzf-$version-openbsd_amd64.tar.gz ;;
+  CYGWIN*\ *64)       download fzf-$version-windows_amd64.zip    ;;
+  MINGW*\ *64)        download fzf-$version-windows_amd64.zip    ;;
+  MSYS*\ *64)         download fzf-$version-windows_amd64.zip    ;;
+  Windows*\ *64)      download fzf-$version-windows_amd64.zip    ;;
+  *)                  binary_available=0 binary_error=1          ;;
 esac
 
-install_ruby_fzf() {
-  echo "Installing legacy Ruby version ..."
-
-  # ruby executable
-  echo -n "Checking Ruby executable ... "
-  ruby=$(command -v ruby)
-  if [ $? -ne 0 ]; then
-    echo "ruby executable not found !!!"
-    exit 1
-  fi
-
-  # System ruby is preferred
-  system_ruby=/usr/bin/ruby
-  if [ -x $system_ruby ] && [ $system_ruby != "$ruby" ]; then
-    $system_ruby --disable-gems -rcurses -e0 2> /dev/null
-    [ $? -eq 0 ] && ruby=$system_ruby
-  fi
-
-  echo "OK ($ruby)"
-
-  # Curses-support
-  echo -n "Checking Curses support ... "
-  "$ruby" -rcurses -e0 2> /dev/null
-  if [ $? -eq 0 ]; then
-    echo "OK"
-  else
-    echo "Not found"
-    echo "Installing 'curses' gem ... "
-    if (( EUID )); then
-      /usr/bin/env gem install curses --user-install
-    else
-      /usr/bin/env gem install curses
-    fi
-    if [ $? -ne 0 ]; then
-      echo
-      echo "Failed to install 'curses' gem."
-      if [[ $(uname -r) =~ 'ARCH' ]]; then
-        echo "Make sure that base-devel package group is installed."
-      fi
-      exit 1
-    fi
-  fi
-
-  # Ruby version
-  echo -n "Checking Ruby version ... "
-  "$ruby" -e 'exit RUBY_VERSION >= "1.9"'
-  if [ $? -eq 0 ]; then
-    echo ">= 1.9"
-    "$ruby" --disable-gems -rcurses -e0 2> /dev/null
-    if [ $? -eq 0 ]; then
-      fzf_cmd="$ruby --disable-gems $fzf_base/fzf"
-    else
-      fzf_cmd="$ruby $fzf_base/fzf"
-    fi
-  else
-    echo "< 1.9"
-    fzf_cmd="$ruby $fzf_base/fzf"
-  fi
-
-  # Create fzf script
-  echo -n "Creating wrapper script for fzf ... "
-  rm -f "$fzf_base"/bin/fzf
-  echo "#!/bin/sh" > "$fzf_base"/bin/fzf
-  echo "$fzf_cmd \"\$@\"" >> "$fzf_base"/bin/fzf
-  chmod +x "$fzf_base"/bin/fzf
-  echo "OK"
-}
-
 cd "$fzf_base"
 if [ -n "$binary_error" ]; then
   if [ $binary_available -eq 0 ]; then
     echo "No prebuilt binary for $archi ..."
-    if command -v go > /dev/null; then
-      echo -n "Building binary (go get -u github.com/junegunn/fzf/src/fzf) ... "
-      if [ -z "${GOPATH-}" ]; then
-        export GOPATH="${TMPDIR:-/tmp}/fzf-gopath"
-        mkdir -p "$GOPATH"
-      fi
-      if go get -u github.com/junegunn/fzf/src/fzf; then
-        echo "OK"
-        cp "$GOPATH/bin/fzf" "$fzf_base/bin/"
-      else
-        echo "Failed to build binary ..."
-        install_ruby_fzf
-      fi
-    else
-      echo "go executable not found. Cannot build binary ..."
-      install_ruby_fzf
-    fi
   else
     echo "  - $binary_error !!!"
+  fi
+  if command -v go > /dev/null; then
+    echo -n "Building binary (go install github.com/junegunn/fzf) ... "
+    if [ -z "${GOPATH-}" ]; then
+      export GOPATH="${TMPDIR:-/tmp}/fzf-gopath"
+      mkdir -p "$GOPATH"
+    fi
+    if go install -ldflags "-s -w -X main.version=$version -X main.revision=go-install" github.com/junegunn/fzf; then
+      echo "OK"
+      cp "$GOPATH/bin/fzf" "$fzf_base/bin/"
+    else
+      echo "Failed to build binary. Installation failed."
+      exit 1
+    fi
+  else
+    echo "go executable not found. Installation failed."
     exit 1
   fi
 fi
 
 [[ "$*" =~ "--bin" ]] && exit 0
 
+for s in $shells; do
+  if ! command -v "$s" > /dev/null; then
+    shells=${shells/$s/}
+  fi
+done
+
+if [[ ${#shells} -lt 3 ]]; then
+  echo "No shell configuration to be updated."
+  exit 0
+fi
+
 # Auto-completion
 if [ -z "$auto_completion" ]; then
   ask "Do you want to enable fuzzy auto-completion?"
@@ -267,13 +240,12 @@ if [ -z "$key_bindings" ]; then
 fi
 
 echo
-has_zsh=$(command -v zsh > /dev/null && echo 1 || echo 0)
-shells=$([ $has_zsh -eq 1 ] && echo "bash zsh" || echo "bash")
 for shell in $shells; do
-  echo -n "Generate ~/.fzf.$shell ... "
-  src=~/.fzf.${shell}
+  [[ "$shell" = fish ]] && continue
+  src=${prefix_expand}.${shell}
+  echo -n "Generate $src ... "
 
-  fzf_completion="[[ \$- == *i* ]] && source \"$fzf_base/shell/completion.${shell}\" 2> /dev/null"
+  fzf_completion="source \"$fzf_base/shell/completion.${shell}\""
   if [ $auto_completion -eq 0 ]; then
     fzf_completion="# $fzf_completion"
   fi
@@ -283,17 +255,11 @@ for shell in $shells; do
     fzf_key_bindings="# $fzf_key_bindings"
   fi
 
-  cat > $src << EOF
+  cat > "$src" << EOF
 # Setup fzf
 # ---------
-if [[ ! "\$PATH" == *$fzf_base/bin* ]]; then
-  export PATH="\$PATH:$fzf_base/bin"
-fi
-
-# Man path
-# --------
-if [[ ! "\$MANPATH" == *$fzf_base/man* && -d "$fzf_base/man" ]]; then
-  export MANPATH="\$MANPATH:$fzf_base/man"
+if [[ ! "\$PATH" == *$fzf_base_esc/bin* ]]; then
+  PATH="\${PATH:+\${PATH}:}$fzf_base/bin"
 fi
 
 # Auto-completion
@@ -303,28 +269,21 @@ $fzf_completion
 # Key bindings
 # ------------
 $fzf_key_bindings
-
 EOF
   echo "OK"
 done
 
 # fish
-has_fish=$(command -v fish > /dev/null && echo 1 || echo 0)
-if [ $has_fish -eq 1 ]; then
+if [[ "$shells" =~ fish ]]; then
   echo -n "Update fish_user_paths ... "
   fish << EOF
-  echo \$fish_user_paths | grep $fzf_base/bin > /dev/null
-  or set --universal fish_user_paths \$fish_user_paths $fzf_base/bin
+  echo \$fish_user_paths | \grep "$fzf_base"/bin > /dev/null
+  or set --universal fish_user_paths \$fish_user_paths "$fzf_base"/bin
 EOF
   [ $? -eq 0 ] && echo "OK" || echo "Failed"
 
-  mkdir -p ~/.config/fish/functions
-  if [ -e ~/.config/fish/functions/fzf.fish ]; then
-    echo -n "Remove unnecessary ~/.config/fish/functions/fzf.fish ... "
-    rm -f ~/.config/fish/functions/fzf.fish && echo "OK" || echo "Failed"
-  fi
-
-  fish_binding=~/.config/fish/functions/fzf_key_bindings.fish
+  mkdir -p "${fish_dir}/functions"
+  fish_binding="${fish_dir}/functions/fzf_key_bindings.fish"
   if [ $key_bindings -ne 0 ]; then
     echo -n "Symlink $fish_binding ... "
     ln -sf "$fzf_base/shell/key-bindings.fish" \
@@ -344,20 +303,22 @@ append_line() {
   line="$2"
   file="$3"
   pat="${4:-}"
+  lno=""
 
   echo "Update $file:"
   echo "  - $line"
-  [ -f "$file" ] || touch "$file"
-  if [ $# -lt 4 ]; then
-    lno=$(\grep -nF "$line" "$file" | sed 's/:.*//' | tr '\n' ' ')
-  else
-    lno=$(\grep -nF "$pat" "$file" | sed 's/:.*//' | tr '\n' ' ')
+  if [ -f "$file" ]; then
+    if [ $# -lt 4 ]; then
+      lno=$(\grep -nF "$line" "$file" | sed 's/:.*//' | tr '\n' ' ')
+    else
+      lno=$(\grep -nF "$pat" "$file" | sed 's/:.*//' | tr '\n' ' ')
+    fi
   fi
   if [ -n "$lno" ]; then
     echo "    - Already exists: line #$lno"
   else
     if [ $update -eq 1 ]; then
-      echo >> "$file"
+      [ -f "$file" ] && echo >> "$file"
       echo "$line" >> "$file"
       echo "    + Added"
     else
@@ -368,6 +329,17 @@ append_line() {
   set +e
 }
 
+create_file() {
+  local file="$1"
+  shift
+  echo "Create $file:"
+  for line in "$@"; do
+    echo "    $line"
+    echo "$line" >> "$file"
+  done
+  echo
+}
+
 if [ $update_config -eq 2 ]; then
   echo
   ask "Do you want to update your shell configuration files?"
@@ -375,23 +347,34 @@ if [ $update_config -eq 2 ]; then
 fi
 echo
 for shell in $shells; do
+  [[ "$shell" = fish ]] && continue
   [ $shell = zsh ] && dest=${ZDOTDIR:-~}/.zshrc || dest=~/.bashrc
-  append_line $update_config "[ -f ~/.fzf.${shell} ] && source ~/.fzf.${shell}" "$dest" "~/.fzf.${shell}"
+  append_line $update_config "[ -f ${prefix}.${shell} ] && source ${prefix}.${shell}" "$dest" "${prefix}.${shell}"
 done
 
-if [ $key_bindings -eq 1 ] && [ $has_fish -eq 1 ]; then
-  bind_file=~/.config/fish/functions/fish_user_key_bindings.fish
-  append_line $update_config "fzf_key_bindings" "$bind_file"
+if [ $key_bindings -eq 1 ] && [[ "$shells" =~ fish ]]; then
+  bind_file="${fish_dir}/functions/fish_user_key_bindings.fish"
+  if [ ! -e "$bind_file" ]; then
+    create_file "$bind_file" \
+      'function fish_user_key_bindings' \
+      '  fzf_key_bindings' \
+      'end'
+  else
+    append_line $update_config "fzf_key_bindings" "$bind_file"
+  fi
 fi
 
 if [ $update_config -eq 1 ]; then
   echo 'Finished. Restart your shell or reload config file.'
-  echo '   source ~/.bashrc  # bash'
-  [ $has_zsh  -eq 1 ] && echo "   source ${ZDOTDIR:-~}/.zshrc   # zsh"
-  [ $has_fish -eq 1 ] && [ $key_bindings -eq 1 ] && echo '   fzf_key_bindings  # fish'
+  if [[ "$shells" =~ bash ]]; then
+    echo -n '   source ~/.bashrc  # bash'
+    [[ "$archi" =~ Darwin ]] && echo -n '  (.bashrc should be loaded from .bash_profile)'
+    echo
+  fi
+  [[ "$shells" =~ zsh ]]  && echo "   source ${ZDOTDIR:-~}/.zshrc   # zsh"
+  [[ "$shells" =~ fish ]] && [ $key_bindings -eq 1 ] && echo '   fzf_key_bindings  # fish'
   echo
   echo 'Use uninstall script to remove fzf.'
   echo
 fi
 echo 'For more information, see: https://github.com/junegunn/fzf'
-

install.ps1

@@ -0,0 +1,65 @@
+$version="0.46.0"
+
+$fzf_base=Split-Path -Parent $MyInvocation.MyCommand.Definition
+
+function check_binary () {
+  Write-Host "  - Checking fzf executable ... " -NoNewline
+  $output=cmd /c $fzf_base\bin\fzf.exe --version 2>&1
+  if (-not $?) {
+    Write-Host "Error: $output"
+    $binary_error="Invalid binary"
+  } else {
+    $output=(-Split $output)[0]
+    if ($version -ne $output) {
+      Write-Host "$output != $version"
+      $binary_error="Invalid version"
+    } else {
+      Write-Host "$output"
+      $binary_error=""
+      return 1
+    }
+  }
+  Remove-Item "$fzf_base\bin\fzf.exe"
+  return 0
+}
+
+function download {
+  param($file)
+  Write-Host "Downloading bin/fzf ..."
+  if (Test-Path "$fzf_base\bin\fzf.exe") {
+    Write-Host "  - Already exists"
+    if (check_binary) {
+      return
+    }
+  }
+  if (-not (Test-Path "$fzf_base\bin")) {
+    md "$fzf_base\bin"
+  }
+  if (-not $?) {
+    $binary_error="Failed to create bin directory"
+    return
+  }
+  cd "$fzf_base\bin"
+  $url="https://github.com/junegunn/fzf/releases/download/$version/$file"
+  $temp=$env:TMP + "\fzf.zip"
+  [Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12
+  if ($PSVersionTable.PSVersion.Major -ge 3) {
+    Invoke-WebRequest -Uri $url -OutFile $temp
+  } else {
+    (New-Object Net.WebClient).DownloadFile($url, $ExecutionContext.SessionState.Path.GetUnresolvedProviderPathFromPSPath("$temp"))
+  }
+  if ($?) {
+    (Microsoft.PowerShell.Archive\Expand-Archive -Path $temp -DestinationPath .); (Remove-Item $temp)
+  } else {
+    $binary_error="Failed to download with powershell"
+  }
+  if (-not (Test-Path fzf.exe)) {
+    $binary_error="Failed to download $file"
+    return
+  }
+  echo y | icacls $fzf_base\bin\fzf.exe /grant Administrator:F ; check_binary >$null
+}
+
+download "fzf-$version-windows_amd64.zip"
+
+Write-Host 'For more information, see: https://github.com/junegunn/fzf'

main.go

@@ -0,0 +1,14 @@
+package main
+
+import (
+	fzf "github.com/junegunn/fzf/src"
+	"github.com/junegunn/fzf/src/protector"
+)
+
+var version string = "0.46"
+var revision string = "devel"
+
+func main() {
+	protector.Protect()
+	fzf.Run(fzf.ParseOptions(), version, revision)
+}

man/man1/fzf-tmux.1

@@ -0,0 +1,68 @@
+.ig
+The MIT License (MIT)
+
+Copyright (c) 2013-2024 Junegunn Choi
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+..
+.TH fzf-tmux 1 "Jan 2024" "fzf 0.46.0" "fzf-tmux - open fzf in tmux split pane"
+
+.SH NAME
+fzf-tmux - open fzf in tmux split pane
+
+.SH SYNOPSIS
+.B fzf-tmux [LAYOUT OPTIONS] [--] [FZF OPTIONS]
+
+.SH DESCRIPTION
+fzf-tmux is a wrapper script for fzf that opens fzf in a tmux split pane or in
+a tmux popup window. It is designed to work just like fzf except that it does
+not take up the whole screen. You can safely use fzf-tmux instead of fzf in
+your scripts as the extra options will be silently ignored if you're not on
+tmux.
+
+.SH LAYOUT OPTIONS
+
+(default layout: \fB-d 50%\fR)
+
+.SS Popup window
+(requires tmux 3.2 or above)
+.TP
+.B "-p [WIDTH[%][,HEIGHT[%]]]"
+.TP
+.B "-w WIDTH[%]"
+.TP
+.B "-h WIDTH[%]"
+.TP
+.B "-x COL"
+.TP
+.B "-y ROW"
+
+.SS Split pane
+.TP
+.B "-u [height[%]]"
+Split above (up)
+.TP
+.B "-d [height[%]]"
+Split below (down)
+.TP
+.B "-l [width[%]]"
+Split left
+.TP
+.B "-r [width[%]]"
+Split right

shell/completion.bash

@@ -1,38 +1,66 @@
-#!/bin/bash
 #     ____      ____
 #    / __/___  / __/
 #   / /_/_  / / /_
 #  / __/ / /_/ __/
-# /_/   /___/_/-completion.bash
+# /_/   /___/_/ completion.bash
 #
-# - $FZF_TMUX               (default: 1)
-# - $FZF_TMUX_HEIGHT        (default: '40%')
+# - $FZF_TMUX               (default: 0)
+# - $FZF_TMUX_OPTS          (default: empty)
 # - $FZF_COMPLETION_TRIGGER (default: '**')
 # - $FZF_COMPLETION_OPTS    (default: empty)
 
+[[ $- =~ i ]] || return 0
+
+
 # To use custom commands instead of find, override _fzf_compgen_{path,dir}
-if ! declare -f _fzf_compgen_path > /dev/null; then
+if ! declare -F _fzf_compgen_path > /dev/null; then
   _fzf_compgen_path() {
     echo "$1"
-    \find -L "$1" \
-      -name .git -prune -o -name .svn -prune -o \( -type d -o -type f -o -type l \) \
-      -a -not -path "$1" -print 2> /dev/null | sed 's@^\./@@'
+    command find -L "$1" \
+      -name .git -prune -o -name .hg -prune -o -name .svn -prune -o \( -type d -o -type f -o -type l \) \
+      -a -not -path "$1" -print 2> /dev/null | command sed 's@^\./@@'
   }
 fi
 
-if ! declare -f _fzf_compgen_dir > /dev/null; then
+if ! declare -F _fzf_compgen_dir > /dev/null; then
   _fzf_compgen_dir() {
-    \find -L "$1" \
-      -name .git -prune -o -name .svn -prune -o -type d \
-      -a -not -path "$1" -print 2> /dev/null | sed 's@^\./@@'
+    command find -L "$1" \
+      -name .git -prune -o -name .hg -prune -o -name .svn -prune -o -type d \
+      -a -not -path "$1" -print 2> /dev/null | command sed 's@^\./@@'
   }
 fi
 
 ###########################################################
 
-_fzf_orig_completion_filter() {
-  sed 's/^\(.*-F\) *\([^ ]*\).* \([^ ]*\)$/export _fzf_orig_completion_\3="\1 %s \3 #\2";/' |
-  awk -F= '{gsub(/[^a-z0-9_= ;]/, "_", $1); print $1"="$2}'
+# To redraw line after fzf closes (printf '\e[5n')
+bind '"\e[0n": redraw-current-line' 2> /dev/null
+
+__fzf_comprun() {
+  if [[ "$(type -t _fzf_comprun 2>&1)" = function ]]; then
+    _fzf_comprun "$@"
+  elif [[ -n "${TMUX_PANE-}" ]] && { [[ "${FZF_TMUX:-0}" != 0 ]] || [[ -n "${FZF_TMUX_OPTS-}" ]]; }; then
+    shift
+    fzf-tmux ${FZF_TMUX_OPTS:--d${FZF_TMUX_HEIGHT:-40%}} -- "$@"
+  else
+    shift
+    fzf "$@"
+  fi
+}
+
+__fzf_orig_completion() {
+  local l comp f cmd
+  while read -r l; do
+    if [[ "$l" =~ ^(.*\ -F)\ *([^ ]*).*\ ([^ ]*)$ ]]; then
+      comp="${BASH_REMATCH[1]}"
+      f="${BASH_REMATCH[2]}"
+      cmd="${BASH_REMATCH[3]}"
+      [[ "$f" = _fzf_* ]] && continue
+      printf -v "_fzf_orig_completion_${cmd//[^A-Za-z0-9_]/_}" "%s" "${comp} %s ${cmd} #${f}"
+      if [[ "$l" = *" -o nospace "* ]] && [[ ! "${__fzf_nospace_commands-}" = *" $cmd "* ]]; then
+        __fzf_nospace_commands="${__fzf_nospace_commands-} $cmd "
+      fi
+    fi
+  done
 }
 
 _fzf_opts_completion() {
@@ -41,49 +69,185 @@ _fzf_opts_completion() {
   cur="${COMP_WORDS[COMP_CWORD]}"
   prev="${COMP_WORDS[COMP_CWORD-1]}"
   opts="
+    -h --help
     -x --extended
     -e --exact
-    -i +i
-    -n --nth
-    -d --delimiter
-    +s --no-sort
-    --tac
+    --extended-exact
+    +x --no-extended
+    +e --no-exact
+    -q --query
+    -f --filter
+    --literal
+    --no-literal
+    --algo
+    --scheme
+    --expect
+    --no-expect
+    --enabled --no-phony
+    --disabled --phony
     --tiebreak
     --bind
-    -m --multi
-    --no-mouse
     --color
-    --black
-    --reverse
-    --no-hscroll
-    --inline-info
-    --prompt
-    -q --query
-    -1 --select-1
-    -0 --exit-0
-    -f --filter
-    --print-query
-    --expect
     --toggle-sort
-    --sync
+    -d --delimiter
+    -n --nth
+    --with-nth
+    -s --sort
+    +s --no-sort
+    --track
+    --no-track
+    --tac
+    --no-tac
+    -i
+    +i
+    -m --multi
+    +m --no-multi
+    --ansi
+    --no-ansi
+    --no-mouse
+    +c --no-color
+    +2 --no-256
+    --black
+    --no-black
+    --bold
+    --no-bold
+    --layout
+    --reverse
+    --no-reverse
     --cycle
+    --no-cycle
+    --keep-right
+    --no-keep-right
+    --hscroll
+    --no-hscroll
+    --hscroll-off
+    --scroll-off
+    --filepath-word
+    --no-filepath-word
+    --info
+    --no-info
+    --inline-info
+    --no-inline-info
+    --separator
+    --no-separator
+    --scrollbar
+    --no-scrollbar
+    --jump-labels
+    -1 --select-1
+    +1 --no-select-1
+    -0 --exit-0
+    +0 --no-exit-0
+    --read0
+    --no-read0
+    --print0
+    --no-print0
+    --print-query
+    --no-print-query
+    --prompt
+    --pointer
+    --marker
+    --sync
+    --no-sync
+    --async
+    --no-history
     --history
     --history-size
+    --no-header
+    --no-header-lines
     --header
     --header-lines
-    --margin"
+    --header-first
+    --no-header-first
+    --ellipsis
+    --preview
+    --no-preview
+    --preview-window
+    --height
+    --min-height
+    --no-height
+    --no-margin
+    --no-padding
+    --no-border
+    --border
+    --no-border-label
+    --border-label
+    --border-label-pos
+    --no-preview-label
+    --preview-label
+    --preview-label-pos
+    --no-unicode
+    --unicode
+    --margin
+    --padding
+    --tabstop
+    --listen
+    --no-listen
+    --clear
+    --no-clear
+    --version
+    --"
 
   case "${prev}" in
+  --algo)
+    COMPREPLY=( $(compgen -W "v1 v2" -- "$cur") )
+    return 0
+    ;;
+  --scheme)
+    COMPREPLY=( $(compgen -W "default path history" -- "$cur") )
+    return 0
+    ;;
   --tiebreak)
-    COMPREPLY=( $(compgen -W "length begin end index" -- "$cur") )
+    COMPREPLY=( $(compgen -W "length chunk begin end index" -- "$cur") )
     return 0
     ;;
   --color)
-    COMPREPLY=( $(compgen -W "dark light 16 bw" -- "$cur") )
+    COMPREPLY=( $(compgen -W "dark light 16 bw no" -- "$cur") )
     return 0
     ;;
-  --history)
-    COMPREPLY=()
+  --layout)
+    COMPREPLY=( $(compgen -W "default reverse reverse-list" -- "$cur") )
+    return 0
+    ;;
+  --info)
+    COMPREPLY=( $(compgen -W "default right hidden inline inline-right" -- "$cur") )
+    return 0
+    ;;
+  --preview-window)
+    COMPREPLY=( $(compgen -W "
+      default
+      hidden
+      nohidden
+      wrap
+      nowrap
+      cycle
+      nocycle
+      up top
+      down bottom
+      left
+      right
+      rounded border border-rounded
+      sharp border-sharp
+      border-bold
+      border-block
+      border-thinblock
+      border-double
+      noborder border-none
+      border-horizontal
+      border-vertical
+      border-up border-top
+      border-down border-bottom
+      border-left
+      border-right
+      follow
+      nofollow" -- "$cur") )
+    return 0
+    ;;
+  --border)
+    COMPREPLY=( $(compgen -W "rounded sharp bold block thinblock double horizontal vertical top bottom left right none" -- "$cur") )
+    return 0
+    ;;
+  --border-label-pos|--preview-label-pos)
+    COMPREPLY=( $(compgen -W "center bottom top" -- "$cur") )
     return 0
     ;;
   esac
@@ -97,55 +261,68 @@ _fzf_opts_completion() {
 }
 
 _fzf_handle_dynamic_completion() {
-  local cmd orig_var orig ret orig_cmd
+  local cmd orig_var orig ret orig_cmd orig_complete
   cmd="$1"
   shift
   orig_cmd="$1"
   orig_var="_fzf_orig_completion_$cmd"
-  orig="${!orig_var##*#}"
-  if [ -n "$orig" ] && type "$orig" > /dev/null 2>&1; then
+  orig="${!orig_var-}"
+  orig="${orig##*#}"
+  if [[ -n "$orig" ]] && type "$orig" > /dev/null 2>&1; then
     $orig "$@"
-  elif [ -n "$_fzf_completion_loader" ]; then
+  elif [[ -n "${_fzf_completion_loader-}" ]]; then
+    orig_complete=$(complete -p "$orig_cmd" 2> /dev/null)
     _completion_loader "$@"
     ret=$?
-    eval "$(complete | \grep "\-F.* $orig_cmd$" | _fzf_orig_completion_filter)"
-    source "${BASH_SOURCE[0]}"
+    # _completion_loader may not have updated completion for the command
+    if [[ "$(complete -p "$orig_cmd" 2> /dev/null)" != "$orig_complete" ]]; then
+      __fzf_orig_completion < <(complete -p "$orig_cmd" 2> /dev/null)
+      if [[ "${__fzf_nospace_commands-}" = *" $orig_cmd "* ]]; then
+        eval "${orig_complete/ -F / -o nospace -F }"
+      else
+        eval "$orig_complete"
+      fi
+    fi
     return $ret
   fi
 }
 
 __fzf_generic_path_completion() {
-  local cur base dir leftover matches trigger cmd fzf
-  [ "${FZF_TMUX:-1}" != 0 ] && fzf="fzf-tmux -d ${FZF_TMUX_HEIGHT:-40%}" || fzf="fzf"
-  cmd=$(echo "${COMP_WORDS[0]}" | sed 's/[^a-z0-9_=]/_/g')
+  local cur base dir leftover matches trigger cmd
+  cmd="${COMP_WORDS[0]}"
+  if [[ $cmd == \\* ]]; then
+    cmd="${cmd:1}"
+  fi
+  cmd="${cmd//[^A-Za-z0-9_=]/_}"
   COMPREPLY=()
   trigger=${FZF_COMPLETION_TRIGGER-'**'}
   cur="${COMP_WORDS[COMP_CWORD]}"
-  if [[ "$cur" == *"$trigger" ]]; then
+  if [[ "$cur" == *"$trigger" ]] && [[ $cur != *'$('* ]] && [[ $cur != *':='* ]] && [[ $cur != *'`'* ]]; then
     base=${cur:0:${#cur}-${#trigger}}
-    eval "base=$base"
+    eval "base=$base" 2> /dev/null || return
 
-    dir="$base"
+    dir=
+    [[ $base = *"/"* ]] && dir="$base"
     while true; do
-      if [ -z "$dir" ] || [ -d "$dir" ]; then
+      if [[ -z "$dir" ]] || [[ -d "$dir" ]]; then
         leftover=${base/#"$dir"}
         leftover=${leftover/#\/}
-        [ -z "$dir" ] && dir='.'
-        [ "$dir" != "/" ] && dir="${dir/%\//}"
-        tput sc
-        matches=$(eval "$1 $(printf %q "$dir")" | $fzf $FZF_COMPLETION_OPTS $2 -q "$leftover" | while read -r item; do
-          printf "%q$3 " "$item"
+        [[ -z "$dir" ]] && dir='.'
+        [[ "$dir" != "/" ]] && dir="${dir/%\//}"
+        matches=$(eval "$1 $(printf %q "$dir")" | FZF_DEFAULT_OPTS="--height ${FZF_TMUX_HEIGHT:-40%} --reverse --scheme=path --bind=ctrl-z:ignore ${FZF_DEFAULT_OPTS-} ${FZF_COMPLETION_OPTS-} $2" __fzf_comprun "$4" -q "$leftover" | while read -r item; do
+          printf "%q " "${item%$3}$3"
         done)
         matches=${matches% }
-        if [ -n "$matches" ]; then
+        [[ -z "$3" ]] && [[ "${__fzf_nospace_commands-}" = *" ${COMP_WORDS[0]} "* ]] && matches="$matches "
+        if [[ -n "$matches" ]]; then
           COMPREPLY=( "$matches" )
         else
           COMPREPLY=( "$cur" )
         fi
-        tput rc
+        printf '\e[5n'
         return 0
       fi
-      dir=$(dirname "$dir")
+      dir=$(command dirname "$dir")
       [[ "$dir" =~ /$ ]] || dir="$dir"/
     done
   else
@@ -157,29 +334,48 @@ __fzf_generic_path_completion() {
 }
 
 _fzf_complete() {
-  local cur selected trigger cmd fzf post
-  post="$(caller 0 | awk '{print $2}')_post"
-  type -t "$post" > /dev/null 2>&1 || post=cat
-  [ "${FZF_TMUX:-1}" != 0 ] && fzf="fzf-tmux -d ${FZF_TMUX_HEIGHT:-40%}" || fzf="fzf"
+  # Split arguments around --
+  local args rest str_arg i sep
+  args=("$@")
+  sep=
+  for i in "${!args[@]}"; do
+    if [[ "${args[$i]}" = -- ]]; then
+      sep=$i
+      break
+    fi
+  done
+  if [[ -n "$sep" ]]; then
+    str_arg=
+    rest=("${args[@]:$((sep + 1)):${#args[@]}}")
+    args=("${args[@]:0:$sep}")
+  else
+    str_arg=$1
+    args=()
+    shift
+    rest=("$@")
+  fi
 
-  cmd=$(echo "${COMP_WORDS[0]}" | sed 's/[^a-z0-9_=]/_/g')
+  local cur selected trigger cmd post
+  post="$(caller 0 | command awk '{print $2}')_post"
+  type -t "$post" > /dev/null 2>&1 || post='command cat'
+
+  cmd="${COMP_WORDS[0]//[^A-Za-z0-9_=]/_}"
   trigger=${FZF_COMPLETION_TRIGGER-'**'}
   cur="${COMP_WORDS[COMP_CWORD]}"
-  if [[ "$cur" == *"$trigger" ]]; then
+  if [[ "$cur" == *"$trigger" ]] && [[ $cur != *'$('* ]] && [[ $cur != *':='* ]] && [[ $cur != *'`'* ]]; then
     cur=${cur:0:${#cur}-${#trigger}}
 
-    tput sc
-    selected=$(cat | $fzf $FZF_COMPLETION_OPTS $1 -q "$cur" | $post | tr '\n' ' ')
+    selected=$(FZF_DEFAULT_OPTS="--height ${FZF_TMUX_HEIGHT:-40%} --reverse --bind=ctrl-z:ignore ${FZF_DEFAULT_OPTS-} ${FZF_COMPLETION_OPTS-} $str_arg" __fzf_comprun "${rest[0]}" "${args[@]}" -q "$cur" | $post | command tr '\n' ' ')
     selected=${selected% } # Strip trailing space not to repeat "-o nospace"
-    tput rc
-
-    if [ -n "$selected" ]; then
+    if [[ -n "$selected" ]]; then
       COMPREPLY=("$selected")
-      return 0
+    else
+      COMPREPLY=("$cur")
     fi
+    printf '\e[5n'
+    return 0
   else
-    shift
-    _fzf_handle_dynamic_completion "$cmd" "$@"
+    _fzf_handle_dynamic_completion "$cmd" "${rest[@]}"
   fi
 }
 
@@ -197,89 +393,108 @@ _fzf_dir_completion() {
 }
 
 _fzf_complete_kill() {
-  [ -n "${COMP_WORDS[COMP_CWORD]}" ] && return 1
-
-  local selected fzf
-  [ "${FZF_TMUX:-1}" != 0 ] && fzf="fzf-tmux -d ${FZF_TMUX_HEIGHT:-40%}" || fzf="fzf"
-  tput sc
-  selected=$(ps -ef | sed 1d | $fzf -m $FZF_COMPLETION_OPTS | awk '{print $2}' | tr '\n' ' ')
-  tput rc
-
-  if [ -n "$selected" ]; then
-    COMPREPLY=( "$selected" )
-    return 0
-  fi
+  _fzf_proc_completion "$@"
 }
 
-_fzf_complete_telnet() {
-  _fzf_complete '+m' "$@" < <(
-    \grep -v '^\s*\(#\|$\)' /etc/hosts | \grep -Fv '0.0.0.0' |
-        awk '{if (length($2) > 0) {print $2}}' | sort -u
+_fzf_proc_completion() {
+  _fzf_complete -m --header-lines=1 --preview 'echo {}' --preview-window down:3:wrap --min-height 15 -- "$@" < <(
+    command ps -eo user,pid,ppid,start,time,command 2> /dev/null ||
+      command ps -eo user,pid,ppid,time,args # For BusyBox
   )
 }
 
+_fzf_proc_completion_post() {
+  command awk '{print $2}'
+}
+
+# To use custom hostname lists, override __fzf_list_hosts.
+# The function is expected to print hostnames, one per line as well as in the
+# desired sorting and with any duplicates removed, to standard output.
+#
+# e.g.
+#   # Use bash-completions’s _known_hosts_real() for getting the list of hosts
+#   __fzf_list_hosts() {
+#     # Set the local attribute for any non-local variable that is set by _known_hosts_real()
+#     local COMPREPLY=()
+#     _known_hosts_real ''
+#     printf '%s\n' "${COMPREPLY[@]}" | command sort -u --version-sort
+#   }
+if ! declare -F __fzf_list_hosts > /dev/null; then
+  __fzf_list_hosts() {
+    command cat <(command tail -n +1 ~/.ssh/config ~/.ssh/config.d/* /etc/ssh/ssh_config 2> /dev/null | command grep -i '^\s*host\(name\)\? ' | command awk '{for (i = 2; i <= NF; i++) print $1 " " $i}' | command grep -v '[*?%]') \
+      <(command grep -oE '^[[a-z0-9.,:-]+' ~/.ssh/known_hosts 2> /dev/null | command tr ',' '\n' | command tr -d '[' | command awk '{ print $1 " " $1 }') \
+      <(command grep -v '^\s*\(#\|$\)' /etc/hosts 2> /dev/null | command grep -Fv '0.0.0.0' | command sed 's/#.*//') |
+      command awk '{for (i = 2; i <= NF; i++) print $i}' | command sort -u
+  }
+fi
+
+_fzf_host_completion() {
+  _fzf_complete +m -- "$@" < <(__fzf_list_hosts)
+}
+
+# Values for $1 $2 $3 are described here
+# https://www.gnu.org/software/bash/manual/html_node/Programmable-Completion.html
+# > the first argument ($1) is the name of the command whose arguments are being completed,
+# > the second argument ($2) is the word being completed,
+# > and the third argument ($3) is the word preceding the word being completed on the current command line.
 _fzf_complete_ssh() {
-  _fzf_complete '+m' "$@" < <(
-    cat <(cat ~/.ssh/config /etc/ssh/ssh_config 2> /dev/null | \grep -i '^host' | \grep -v '*') \
-        <(\grep -oE '^[^ ]+' ~/.ssh/known_hosts | tr ',' '\n' | awk '{ print $1 " " $1 }') \
-        <(\grep -v '^\s*\(#\|$\)' /etc/hosts | \grep -Fv '0.0.0.0') |
-        awk '{if (length($2) > 0) {print $2}}' | sort -u
+  case $3 in
+    -i|-F|-E)
+      _fzf_path_completion "$@"
+      ;;
+    *)
+      local user=
+      [[ "$2" =~ '@' ]] && user="${2%%@*}@"
+      _fzf_complete +m -- "$@" < <(__fzf_list_hosts | command awk -v user="$user" '{print user $0}')
+      ;;
+  esac
+}
+
+_fzf_var_completion() {
+  _fzf_complete -m -- "$@" < <(
+    declare -xp | command sed -En 's|^declare [^ ]+ ([^=]+).*|\1|p'
   )
 }
 
-_fzf_complete_unset() {
-  _fzf_complete '-m' "$@" < <(
-    declare -xp | sed 's/=.*//' | sed 's/.* //'
-  )
-}
-
-_fzf_complete_export() {
-  _fzf_complete '-m' "$@" < <(
-    declare -xp | sed 's/=.*//' | sed 's/.* //'
-  )
-}
-
-_fzf_complete_unalias() {
-  _fzf_complete '-m' "$@" < <(
-    alias | sed 's/=.*//' | sed 's/.* //'
+_fzf_alias_completion() {
+  _fzf_complete -m -- "$@" < <(
+    alias | command sed -En 's|^alias ([^=]+).*|\1|p'
   )
 }
 
 # fzf options
 complete -o default -F _fzf_opts_completion fzf
+# fzf-tmux is a thin fzf wrapper that has only a few more options than fzf
+# itself. As a quick improvement we take fzf's completion. Adding the few extra
+# fzf-tmux specific options (like `-w WIDTH`) are left as a future patch.
+complete -o default -F _fzf_opts_completion fzf-tmux
 
 d_cmds="${FZF_COMPLETION_DIR_COMMANDS:-cd pushd rmdir}"
 a_cmds="
-  awk cat diff diff3
-  emacs emacsclient ex file ftp g++ gcc gvim head hg java
+  awk bat cat diff diff3
+  emacs emacsclient ex file ftp g++ gcc gvim head hg hx java
   javac ld less more mvim nvim patch perl python ruby
   sed sftp sort source tail tee uniq vi view vim wc xdg-open
   basename bunzip2 bzip2 chmod chown curl cp dirname du
   find git grep gunzip gzip hg jar
   ln ls mv open rm rsync scp
   svn tar unzip zip"
-x_cmds="kill ssh telnet unset unalias export"
 
 # Preserve existing completion
-if [ "$_fzf_completion_loaded" != '0.11.3' ]; then
-  # Really wish I could use associative array but OSX comes with bash 3.2 :(
-  eval $(complete | \grep '\-F' | \grep -v _fzf_ |
-    \grep -E " ($(echo $d_cmds $a_cmds $x_cmds | sed 's/ /|/g' | sed 's/+/\\+/g'))$" | _fzf_orig_completion_filter)
-  export _fzf_completion_loaded=0.11.3
-fi
+__fzf_orig_completion < <(complete -p $d_cmds $a_cmds ssh 2> /dev/null)
 
 if type _completion_loader > /dev/null 2>&1; then
   _fzf_completion_loader=1
 fi
 
-_fzf_defc() {
+__fzf_defc() {
   local cmd func opts orig_var orig def
   cmd="$1"
   func="$2"
   opts="$3"
-  orig_var="_fzf_orig_completion_$cmd"
-  orig="${!orig_var}"
-  if [ -n "$orig" ]; then
+  orig_var="_fzf_orig_completion_${cmd//[^A-Za-z0-9_]/_}"
+  orig="${!orig_var-}"
+  if [[ -n "$orig" ]]; then
     printf -v def "$orig" "$func"
     eval "$def"
   else
@@ -289,26 +504,41 @@ _fzf_defc() {
 
 # Anything
 for cmd in $a_cmds; do
-  _fzf_defc "$cmd" _fzf_path_completion "-o default -o bashdefault"
+  __fzf_defc "$cmd" _fzf_path_completion "-o default -o bashdefault"
 done
 
 # Directory
 for cmd in $d_cmds; do
-  _fzf_defc "$cmd" _fzf_dir_completion "-o nospace -o plusdirs"
+  __fzf_defc "$cmd" _fzf_dir_completion "-o nospace -o dirnames"
 done
 
-unset _fzf_defc
+# ssh
+__fzf_defc ssh _fzf_complete_ssh "-o default -o bashdefault"
 
-# Kill completion
-complete -F _fzf_complete_kill -o nospace -o default -o bashdefault kill
+unset cmd d_cmds a_cmds
 
-# Host completion
-complete -F _fzf_complete_ssh -o default -o bashdefault ssh
-complete -F _fzf_complete_telnet -o default -o bashdefault telnet
+_fzf_setup_completion() {
+  local kind fn cmd
+  kind=$1
+  fn=_fzf_${1}_completion
+  if [[ $# -lt 2 ]] || ! type -t "$fn" > /dev/null; then
+    echo "usage: ${FUNCNAME[0]} path|dir|var|alias|host|proc COMMANDS..."
+    return 1
+  fi
+  shift
+  __fzf_orig_completion < <(complete -p "$@" 2> /dev/null)
+  for cmd in "$@"; do
+    case "$kind" in
+      dir)   __fzf_defc "$cmd" "$fn" "-o nospace -o dirnames" ;;
+      var)   __fzf_defc "$cmd" "$fn" "-o default -o nospace -v" ;;
+      alias) __fzf_defc "$cmd" "$fn" "-a" ;;
+      *)     __fzf_defc "$cmd" "$fn" "-o default -o bashdefault" ;;
+    esac
+  done
+}
 
-# Environment variables / Aliases
-complete -F _fzf_complete_unset -o default -o bashdefault unset
-complete -F _fzf_complete_export -o default -o bashdefault export
-complete -F _fzf_complete_unalias -o default -o bashdefault unalias
-
-unset cmd d_cmds a_cmds x_cmds
+# Environment variables / Aliases / Hosts / Process
+_fzf_setup_completion 'var'   export unset printenv
+_fzf_setup_completion 'alias' unalias
+_fzf_setup_completion 'host'  telnet
+_fzf_setup_completion 'proc'  kill

shell/completion.zsh

@@ -1,63 +1,162 @@
-#!/bin/zsh
 #     ____      ____
 #    / __/___  / __/
 #   / /_/_  / / /_
 #  / __/ / /_/ __/
-# /_/   /___/_/-completion.zsh
+# /_/   /___/_/ completion.zsh
 #
-# - $FZF_TMUX               (default: 1)
-# - $FZF_TMUX_HEIGHT        (default: '40%')
+# - $FZF_TMUX               (default: 0)
+# - $FZF_TMUX_OPTS          (default: '-d 40%')
 # - $FZF_COMPLETION_TRIGGER (default: '**')
 # - $FZF_COMPLETION_OPTS    (default: empty)
 
+[[ -o interactive ]] || return 0
+
+
+# Both branches of the following `if` do the same thing -- define
+# __fzf_completion_options such that `eval $__fzf_completion_options` sets
+# all options to the same values they currently have. We'll do just that at
+# the bottom of the file after changing options to what we prefer.
+#
+# IMPORTANT: Until we get to the `emulate` line, all words that *can* be quoted
+# *must* be quoted in order to prevent alias expansion. In addition, code must
+# be written in a way works with any set of zsh options. This is very tricky, so
+# careful when you change it.
+#
+# Start by loading the builtin zsh/parameter module. It provides `options`
+# associative array that stores current shell options.
+if 'zmodload' 'zsh/parameter' 2>'/dev/null' && (( ${+options} )); then
+  # This is the fast branch and it gets taken on virtually all Zsh installations.
+  #
+  # ${(kv)options[@]} expands to array of keys (option names) and values ("on"
+  # or "off"). The subsequent expansion# with (j: :) flag joins all elements
+  # together separated by spaces. __fzf_completion_options ends up with a value
+  # like this: "options=(shwordsplit off aliases on ...)".
+  __fzf_completion_options="options=(${(j: :)${(kv)options[@]}})"
+else
+  # This branch is much slower because it forks to get the names of all
+  # zsh options. It's possible to eliminate this fork but it's not worth the
+  # trouble because this branch gets taken only on very ancient or broken
+  # zsh installations.
+  () {
+    # That `()` above defines an anonymous function. This is essentially a scope
+    # for local parameters. We use it to avoid polluting global scope.
+    'local' '__fzf_opt'
+    __fzf_completion_options="setopt"
+    # `set -o` prints one line for every zsh option. Each line contains option
+    # name, some spaces, and then either "on" or "off". We just want option names.
+    # Expansion with (@f) flag splits a string into lines. The outer expansion
+    # removes spaces and everything that follow them on every line. __fzf_opt
+    # ends up iterating over option names: shwordsplit, aliases, etc.
+    for __fzf_opt in "${(@)${(@f)$(set -o)}%% *}"; do
+      if [[ -o "$__fzf_opt" ]]; then
+        # Option $__fzf_opt is currently on, so remember to set it back on.
+        __fzf_completion_options+=" -o $__fzf_opt"
+      else
+        # Option $__fzf_opt is currently off, so remember to set it back off.
+        __fzf_completion_options+=" +o $__fzf_opt"
+      fi
+    done
+    # The value of __fzf_completion_options here looks like this:
+    # "setopt +o shwordsplit -o aliases ..."
+  }
+fi
+
+# Enable the default zsh options (those marked with <Z> in `man zshoptions`)
+# but without `aliases`. Aliases in functions are expanded when functions are
+# defined, so if we disable aliases here, we'll be sure to have no pesky
+# aliases in any of our functions. This way we won't need prefix every
+# command with `command` or to quote every word to defend against global
+# aliases. Note that `aliases` is not the only option that's important to
+# control. There are several others that could wreck havoc if they are set
+# to values we don't expect. With the following `emulate` command we
+# sidestep this issue entirely.
+'builtin' 'emulate' 'zsh' && 'builtin' 'setopt' 'no_aliases'
+
+# This brace is the start of try-always block. The `always` part is like
+# `finally` in lesser languages. We use it to *always* restore user options.
+{
+
 # To use custom commands instead of find, override _fzf_compgen_{path,dir}
 if ! declare -f _fzf_compgen_path > /dev/null; then
   _fzf_compgen_path() {
     echo "$1"
-    \find -L "$1" \
-      -name .git -prune -o -name .svn -prune -o \( -type d -o -type f -o -type l \) \
+    command find -L "$1" \
+      -name .git -prune -o -name .hg -prune -o -name .svn -prune -o \( -type d -o -type f -o -type l \) \
       -a -not -path "$1" -print 2> /dev/null | sed 's@^\./@@'
   }
 fi
 
 if ! declare -f _fzf_compgen_dir > /dev/null; then
   _fzf_compgen_dir() {
-    \find -L "$1" \
-      -name .git -prune -o -name .svn -prune -o -type d \
+    command find -L "$1" \
+      -name .git -prune -o -name .hg -prune -o -name .svn -prune -o -type d \
       -a -not -path "$1" -print 2> /dev/null | sed 's@^\./@@'
   }
 fi
 
 ###########################################################
 
+__fzf_comprun() {
+  if [[ "$(type _fzf_comprun 2>&1)" =~ function ]]; then
+    _fzf_comprun "$@"
+  elif [ -n "${TMUX_PANE-}" ] && { [ "${FZF_TMUX:-0}" != 0 ] || [ -n "${FZF_TMUX_OPTS-}" ]; }; then
+    shift
+    if [ -n "${FZF_TMUX_OPTS-}" ]; then
+      fzf-tmux ${(Q)${(Z+n+)FZF_TMUX_OPTS}} -- "$@"
+    else
+      fzf-tmux -d ${FZF_TMUX_HEIGHT:-40%} -- "$@"
+    fi
+  else
+    shift
+    fzf "$@"
+  fi
+}
+
+# Extract the name of the command. e.g. foo=1 bar baz**<tab>
+__fzf_extract_command() {
+  local token tokens
+  tokens=(${(z)1})
+  for token in $tokens; do
+    token=${(Q)token}
+    if [[ "$token" =~ [[:alnum:]] && ! "$token" =~ "=" ]]; then
+      echo "$token"
+      return
+    fi
+  done
+  echo "${tokens[1]}"
+}
+
 __fzf_generic_path_completion() {
-  local base lbuf compgen fzf_opts suffix tail fzf dir leftover matches
-  # (Q) flag removes a quoting level: "foo\ bar" => "foo bar"
-  base=${(Q)1}
+  local base lbuf cmd compgen fzf_opts suffix tail dir leftover matches
+  base=$1
   lbuf=$2
+  cmd=$(__fzf_extract_command "$lbuf")
   compgen=$3
   fzf_opts=$4
   suffix=$5
   tail=$6
-  [ ${FZF_TMUX:-1} -eq 1 ] && fzf="fzf-tmux -d ${FZF_TMUX_HEIGHT:-40%}" || fzf="fzf"
 
   setopt localoptions nonomatch
-  dir="$base"
+  if [[ $base = *'$('* ]] || [[ $base = *'<('* ]] || [[ $base = *'>('* ]] || [[ $base = *':='* ]] || [[ $base = *'`'* ]]; then
+    return
+  fi
+  eval "base=$base" 2> /dev/null || return
+  [[ $base = *"/"* ]] && dir="$base"
   while [ 1 ]; do
-    if [ -z "$dir" -o -d ${~dir} ]; then
+    if [[ -z "$dir" || -d ${dir} ]]; then
       leftover=${base/#"$dir"}
       leftover=${leftover/#\/}
       [ -z "$dir" ] && dir='.'
       [ "$dir" != "/" ] && dir="${dir/%\//}"
-      dir=${~dir}
-      matches=$(eval "$compgen $(printf %q "$dir")" | ${=fzf} ${=FZF_COMPLETION_OPTS} ${=fzf_opts} -q "$leftover" | while read item; do
-        echo -n "${(q)item}$suffix "
+      matches=$(eval "$compgen $(printf %q "$dir")" | FZF_DEFAULT_OPTS="--height ${FZF_TMUX_HEIGHT:-40%} --reverse --scheme=path --bind=ctrl-z:ignore ${FZF_DEFAULT_OPTS-} ${FZF_COMPLETION_OPTS-}" __fzf_comprun "$cmd" ${(Q)${(Z+n+)fzf_opts}} -q "$leftover" | while read item; do
+        item="${item%$suffix}$suffix"
+        echo -n "${(q)item} "
       done)
       matches=${matches% }
       if [ -n "$matches" ]; then
         LBUFFER="$lbuf$matches$tail"
       fi
-      zle redisplay
+      zle reset-prompt
       break
     fi
     dir=$(dirname "$dir")
@@ -76,67 +175,114 @@ _fzf_dir_completion() {
 }
 
 _fzf_feed_fifo() (
-  rm -f "$1"
+  command rm -f "$1"
   mkfifo "$1"
   cat <&0 > "$1" &
 )
 
 _fzf_complete() {
-  local fifo fzf_opts lbuf fzf matches post
+  setopt localoptions ksh_arrays
+  # Split arguments around --
+  local args rest str_arg i sep
+  args=("$@")
+  sep=
+  for i in {0..${#args[@]}}; do
+    if [[ "${args[$i]-}" = -- ]]; then
+      sep=$i
+      break
+    fi
+  done
+  if [[ -n "$sep" ]]; then
+    str_arg=
+    rest=("${args[@]:$((sep + 1)):${#args[@]}}")
+    args=("${args[@]:0:$sep}")
+  else
+    str_arg=$1
+    args=()
+    shift
+    rest=("$@")
+  fi
+
+  local fifo lbuf cmd matches post
   fifo="${TMPDIR:-/tmp}/fzf-complete-fifo-$$"
-  fzf_opts=$1
-  lbuf=$2
-  post="${funcstack[2]}_post"
+  lbuf=${rest[0]}
+  cmd=$(__fzf_extract_command "$lbuf")
+  post="${funcstack[1]}_post"
   type $post > /dev/null 2>&1 || post=cat
 
-  [ ${FZF_TMUX:-1} -eq 1 ] && fzf="fzf-tmux -d ${FZF_TMUX_HEIGHT:-40%}" || fzf="fzf"
-
   _fzf_feed_fifo "$fifo"
-  matches=$(cat "$fifo" | ${=fzf} ${=FZF_COMPLETION_OPTS} ${=fzf_opts} -q "${(Q)prefix}" | $post | tr '\n' ' ')
+  matches=$(FZF_DEFAULT_OPTS="--height ${FZF_TMUX_HEIGHT:-40%} --reverse --bind=ctrl-z:ignore ${FZF_DEFAULT_OPTS-} ${FZF_COMPLETION_OPTS-} $str_arg" __fzf_comprun "$cmd" "${args[@]}" -q "${(Q)prefix}" < "$fifo" | $post | tr '\n' ' ')
   if [ -n "$matches" ]; then
     LBUFFER="$lbuf$matches"
   fi
-  zle redisplay
-  rm -f "$fifo"
+  command rm -f "$fifo"
 }
 
+# To use custom hostname lists, override __fzf_list_hosts.
+# The function is expected to print hostnames, one per line as well as in the
+# desired sorting and with any duplicates removed, to standard output.
+if ! declare -f __fzf_list_hosts > /dev/null; then
+  __fzf_list_hosts() {
+    setopt localoptions nonomatch
+    command cat <(command tail -n +1 ~/.ssh/config ~/.ssh/config.d/* /etc/ssh/ssh_config 2> /dev/null | command grep -i '^\s*host\(name\)\? ' | awk '{for (i = 2; i <= NF; i++) print $1 " " $i}' | command grep -v '[*?%]') \
+      <(command grep -oE '^[[a-z0-9.,:-]+' ~/.ssh/known_hosts 2> /dev/null | tr ',' '\n' | tr -d '[' | awk '{ print $1 " " $1 }') \
+      <(command grep -v '^\s*\(#\|$\)' /etc/hosts 2> /dev/null | command grep -Fv '0.0.0.0' | command sed 's/#.*//') |
+      awk '{for (i = 2; i <= NF; i++) print $i}' | sort -u
+  }
+fi
+
 _fzf_complete_telnet() {
-  _fzf_complete '+m' "$@" < <(
-    \grep -v '^\s*\(#\|$\)' /etc/hosts | \grep -Fv '0.0.0.0' |
-        awk '{if (length($2) > 0) {print $2}}' | sort -u
-  )
+  _fzf_complete +m -- "$@" < <(__fzf_list_hosts)
 }
 
+# The first and the only argument is the LBUFFER without the current word that contains the trigger.
+# The current word without the trigger is in the $prefix variable passed from the caller.
 _fzf_complete_ssh() {
-  _fzf_complete '+m' "$@" < <(
-    cat <(cat ~/.ssh/config /etc/ssh/ssh_config 2> /dev/null | \grep -i '^host' | \grep -v '*') \
-        <(\grep -oE '^[^ ]+' ~/.ssh/known_hosts | tr ',' '\n' | awk '{ print $1 " " $1 }') \
-        <(\grep -v '^\s*\(#\|$\)' /etc/hosts | \grep -Fv '0.0.0.0') |
-        awk '{if (length($2) > 0) {print $2}}' | sort -u
-  )
+  local tokens=(${(z)1})
+  case ${tokens[-1]} in
+    -i|-F|-E)
+      _fzf_path_completion "$prefix" "$1"
+      ;;
+    *)
+      local user=
+      [[ $prefix =~ @ ]] && user="${prefix%%@*}@"
+      _fzf_complete +m -- "$@" < <(__fzf_list_hosts | awk -v user="$user" '{print user $0}')
+      ;;
+  esac
 }
 
 _fzf_complete_export() {
-  _fzf_complete '-m' "$@" < <(
+  _fzf_complete -m -- "$@" < <(
     declare -xp | sed 's/=.*//' | sed 's/.* //'
   )
 }
 
 _fzf_complete_unset() {
-  _fzf_complete '-m' "$@" < <(
+  _fzf_complete -m -- "$@" < <(
     declare -xp | sed 's/=.*//' | sed 's/.* //'
   )
 }
 
 _fzf_complete_unalias() {
-  _fzf_complete '+m' "$@" < <(
+  _fzf_complete +m -- "$@" < <(
     alias | sed 's/=.*//'
   )
 }
 
+_fzf_complete_kill() {
+  _fzf_complete -m --header-lines=1 --preview 'echo {}' --preview-window down:3:wrap --min-height 15 -- "$@" < <(
+    command ps -eo user,pid,ppid,start,time,command 2> /dev/null ||
+      command ps -eo user,pid,ppid,time,args # For BusyBox
+  )
+}
+
+_fzf_complete_kill_post() {
+  awk '{print $2}'
+}
+
 fzf-completion() {
-  local tokens cmd prefix trigger tail fzf matches lbuf d_cmds
-  setopt localoptions noshwordsplit
+  local tokens cmd prefix trigger tail matches lbuf d_cmds
+  setopt localoptions noshwordsplit noksh_arrays noposixbuiltins
 
   # http://zsh.sourceforge.net/FAQ/zshfaq03.html
   # http://zsh.sourceforge.net/Doc/Release/Expansion.html#Parameter-Expansion-Flags
@@ -146,30 +292,34 @@ fzf-completion() {
     return
   fi
 
-  cmd=${tokens[1]}
+  cmd=$(__fzf_extract_command "$LBUFFER")
 
   # Explicitly allow for empty trigger.
   trigger=${FZF_COMPLETION_TRIGGER-'**'}
   [ -z "$trigger" -a ${LBUFFER[-1]} = ' ' ] && tokens+=("")
 
+  # When the trigger starts with ';', it becomes a separate token
+  if [[ ${LBUFFER} = *"${tokens[-2]-}${tokens[-1]}" ]]; then
+    tokens[-2]="${tokens[-2]-}${tokens[-1]}"
+    tokens=(${tokens[0,-2]})
+  fi
+
+  lbuf=$LBUFFER
   tail=${LBUFFER:$(( ${#LBUFFER} - ${#trigger} ))}
-  # Kill completion (do not require trigger sequence)
-  if [ $cmd = kill -a ${LBUFFER[-1]} = ' ' ]; then
-    [ ${FZF_TMUX:-1} -eq 1 ] && fzf="fzf-tmux -d ${FZF_TMUX_HEIGHT:-40%}" || fzf="fzf"
-    matches=$(ps -ef | sed 1d | ${=fzf} ${=FZF_COMPLETION_OPTS} -m | awk '{print $2}' | tr '\n' ' ')
-    if [ -n "$matches" ]; then
-      LBUFFER="$LBUFFER$matches"
-    fi
-    zle redisplay
+
   # Trigger sequence given
-  elif [ ${#tokens} -gt 1 -a "$tail" = "$trigger" ]; then
+  if [ ${#tokens} -gt 1 -a "$tail" = "$trigger" ]; then
     d_cmds=(${=FZF_COMPLETION_DIR_COMMANDS:-cd pushd rmdir})
 
     [ -z "$trigger"      ] && prefix=${tokens[-1]} || prefix=${tokens[-1]:0:-${#trigger}}
-    [ -z "${tokens[-1]}" ] && lbuf=$LBUFFER        || lbuf=${LBUFFER:0:-${#tokens[-1]}}
+    if [[ $prefix = *'$('* ]] || [[ $prefix = *'<('* ]] || [[ $prefix = *'>('* ]] || [[ $prefix = *':='* ]] || [[ $prefix = *'`'* ]]; then
+      return
+    fi
+    [ -n "${tokens[-1]}" ] && lbuf=${lbuf:0:-${#tokens[-1]}}
 
     if eval "type _fzf_complete_${cmd} > /dev/null"; then
-      eval "prefix=\"$prefix\" _fzf_complete_${cmd} \"$lbuf\""
+      prefix="$prefix" eval _fzf_complete_${cmd} ${(q)lbuf}
+      zle reset-prompt
     elif [ ${d_cmds[(i)$cmd]} -le ${#d_cmds} ]; then
       _fzf_dir_completion "$prefix" "$lbuf"
     else
@@ -183,9 +333,15 @@ fzf-completion() {
 
 [ -z "$fzf_default_completion" ] && {
   binding=$(bindkey '^I')
-  [[ $binding =~ 'undefined-key' ]] || fzf_default_completion=$binding[(w)2]
+  [[ $binding =~ 'undefined-key' ]] || fzf_default_completion=$binding[(s: :w)2]
   unset binding
 }
 
 zle     -N   fzf-completion
 bindkey '^I' fzf-completion
+
+} always {
+  # Restore the original options.
+  eval $__fzf_completion_options
+  'unset' '__fzf_completion_options'
+}

shell/key-bindings.bash

@@ -1,125 +1,133 @@
+#     ____      ____
+#    / __/___  / __/
+#   / /_/_  / / /_
+#  / __/ / /_/ __/
+# /_/   /___/_/ key-bindings.bash
+#
+# - $FZF_TMUX_OPTS
+# - $FZF_CTRL_T_COMMAND
+# - $FZF_CTRL_T_OPTS
+# - $FZF_CTRL_R_OPTS
+# - $FZF_ALT_C_COMMAND
+# - $FZF_ALT_C_OPTS
+
+[[ $- =~ i ]] || return 0
+
+
 # Key bindings
 # ------------
 __fzf_select__() {
-  local cmd="${FZF_CTRL_T_COMMAND:-"command find -L . \\( -path '*/\\.*' -o -fstype 'dev' -o -fstype 'proc' \\) -prune \
+  local cmd opts
+  cmd="${FZF_CTRL_T_COMMAND:-"command find -L . -mindepth 1 \\( -path '*/.*' -o -fstype 'sysfs' -o -fstype 'devfs' -o -fstype 'devtmpfs' -o -fstype 'proc' \\) -prune \
     -o -type f -print \
     -o -type d -print \
-    -o -type l -print 2> /dev/null | sed 1d | cut -b3-"}"
-  eval "$cmd | fzf -m $FZF_CTRL_T_OPTS" | while read -r item; do
-    printf '%q ' "$item"
-  done
-  echo
+    -o -type l -print 2> /dev/null | command cut -b3-"}"
+  opts="--height ${FZF_TMUX_HEIGHT:-40%} --bind=ctrl-z:ignore --reverse --scheme=path ${FZF_DEFAULT_OPTS-} ${FZF_CTRL_T_OPTS-} -m"
+  eval "$cmd" |
+    FZF_DEFAULT_OPTS="$opts" $(__fzfcmd) "$@" |
+    while read -r item; do
+      printf '%q ' "$item"  # escape special chars
+    done
 }
 
-if [[ $- =~ i ]]; then
-
 __fzfcmd() {
-  [ "${FZF_TMUX:-1}" != 0 ] && echo "fzf-tmux -d${FZF_TMUX_HEIGHT:-40%}" || echo "fzf"
-}
-
-__fzf_select_tmux__() {
-  local height
-  height=${FZF_TMUX_HEIGHT:-40%}
-  if [[ $height =~ %$ ]]; then
-    height="-p ${height%\%}"
-  else
-    height="-l $height"
-  fi
-
-  tmux split-window $height "cd $(printf %q "$PWD"); FZF_DEFAULT_OPTS=$(printf %q "$FZF_DEFAULT_OPTS") PATH=$(printf %q "$PATH") FZF_CTRL_T_COMMAND=$(printf %q "$FZF_CTRL_T_COMMAND") FZF_CTRL_T_OPTS=$(printf %q "$FZF_CTRL_T_OPTS") bash -c 'source \"${BASH_SOURCE[0]}\"; tmux send-keys -t $TMUX_PANE \"\$(__fzf_select__)\"'"
+  [[ -n "${TMUX_PANE-}" ]] && { [[ "${FZF_TMUX:-0}" != 0 ]] || [[ -n "${FZF_TMUX_OPTS-}" ]]; } &&
+    echo "fzf-tmux ${FZF_TMUX_OPTS:--d${FZF_TMUX_HEIGHT:-40%}} -- " || echo "fzf"
 }
 
 fzf-file-widget() {
-  if __fzf_use_tmux__; then
-    __fzf_select_tmux__
-  else
-    local selected="$(__fzf_select__)"
-    READLINE_LINE="${READLINE_LINE:0:$READLINE_POINT}$selected${READLINE_LINE:$READLINE_POINT}"
-    READLINE_POINT=$(( READLINE_POINT + ${#selected} ))
-  fi
+  local selected="$(__fzf_select__ "$@")"
+  READLINE_LINE="${READLINE_LINE:0:$READLINE_POINT}$selected${READLINE_LINE:$READLINE_POINT}"
+  READLINE_POINT=$(( READLINE_POINT + ${#selected} ))
 }
 
 __fzf_cd__() {
-  local cmd dir
-  cmd="${FZF_ALT_C_COMMAND:-"command find -L . \\( -path '*/\\.*' -o -fstype 'dev' -o -fstype 'proc' \\) -prune \
-    -o -type d -print 2> /dev/null | sed 1d | cut -b3-"}"
-  dir=$(eval "$cmd | $(__fzfcmd) +m $FZF_ALT_C_OPTS") && printf 'cd %q' "$dir"
+  local cmd opts dir
+  cmd="${FZF_ALT_C_COMMAND:-"command find -L . -mindepth 1 \\( -path '*/.*' -o -fstype 'sysfs' -o -fstype 'devfs' -o -fstype 'devtmpfs' -o -fstype 'proc' \\) -prune \
+    -o -type d -print 2> /dev/null | command cut -b3-"}"
+  opts="--height ${FZF_TMUX_HEIGHT:-40%} --bind=ctrl-z:ignore --reverse --scheme=path ${FZF_DEFAULT_OPTS-} ${FZF_ALT_C_OPTS-} +m"
+  dir=$(set +o pipefail; eval "$cmd" | FZF_DEFAULT_OPTS="$opts" $(__fzfcmd)) && printf 'builtin cd -- %q' "$dir"
 }
 
-__fzf_history__() (
-  local line
-  shopt -u nocaseglob nocasematch
-  line=$(
-    HISTTIMEFORMAT= history |
-    eval "$(__fzfcmd) +s --tac +m -n2..,.. --tiebreak=index --toggle-sort=ctrl-r $FZF_CTRL_R_OPTS" |
-    \grep '^ *[0-9]') &&
-    if [[ $- =~ H ]]; then
-      sed 's/^ *\([0-9]*\)\** .*/!\1/' <<< "$line"
+if command -v perl > /dev/null; then
+  __fzf_history__() {
+    local output opts script
+    opts="--height ${FZF_TMUX_HEIGHT:-40%} --bind=ctrl-z:ignore ${FZF_DEFAULT_OPTS-} -n2..,.. --scheme=history --bind=ctrl-r:toggle-sort ${FZF_CTRL_R_OPTS-} +m --read0"
+    script='BEGIN { getc; $/ = "\n\t"; $HISTCOUNT = $ENV{last_hist} + 1 } s/^[ *]//; print $HISTCOUNT - $. . "\t$_" if !$seen{$_}++'
+    output=$(
+      set +o pipefail
+      builtin fc -lnr -2147483648 |
+        last_hist=$(HISTTIMEFORMAT='' builtin history 1) command perl -n -l0 -e "$script" |
+        FZF_DEFAULT_OPTS="$opts" $(__fzfcmd) --query "$READLINE_LINE"
+    ) || return
+    READLINE_LINE=${output#*$'\t'}
+    if [[ -z "$READLINE_POINT" ]]; then
+      echo "$READLINE_LINE"
     else
-      sed 's/^ *\([0-9]*\)\** *//' <<< "$line"
+      READLINE_POINT=0x7fffffff
     fi
-)
+  }
+else # awk - fallback for POSIX systems
+  __fzf_history__() {
+    local output opts script n x y z d
+    if [[ -z $__fzf_awk ]]; then
+      __fzf_awk=awk
+      # choose the faster mawk if: it's installed && build date >= 20230322 && version >= 1.3.4
+      IFS=' .' read n x y z d <<< $(command mawk -W version 2> /dev/null)
+      [[ $n == mawk ]] && (( d >= 20230302 && (x *1000 +y) *1000 +z >= 1003004 )) && __fzf_awk=mawk
+    fi
+    opts="--height ${FZF_TMUX_HEIGHT:-40%} --bind=ctrl-z:ignore ${FZF_DEFAULT_OPTS-} -n2..,.. --scheme=history --bind=ctrl-r:toggle-sort ${FZF_CTRL_R_OPTS-} +m --read0"
+    [[ $(HISTTIMEFORMAT='' builtin history 1) =~ [[:digit:]]+ ]]    # how many history entries
+    script='function P(b) { ++n; sub(/^[ *]/, "", b); if (!seen[b]++) { printf "%d\t%s%c", '$((BASH_REMATCH + 1))' - n, b, 0 } }
+    NR==1 { b = substr($0, 2); next }
+    /^\t/ { P(b); b = substr($0, 2); next }
+    { b = b RS $0 }
+    END { if (NR) P(b) }'
+    output=$(
+      set +o pipefail
+      builtin fc -lnr -2147483648 2> /dev/null |   # ( $'\t '<lines>$'\n' )* ; <lines> ::= [^\n]* ( $'\n'<lines> )*
+        command $__fzf_awk "$script"           |   # ( <counter>$'\t'<lines>$'\000' )*
+        FZF_DEFAULT_OPTS="$opts" $(__fzfcmd) --query "$READLINE_LINE"
+    ) || return
+    READLINE_LINE=${output#*$'\t'}
+    if [[ -z "$READLINE_POINT" ]]; then
+      echo "$READLINE_LINE"
+    else
+      READLINE_POINT=0x7fffffff
+    fi
+  }
+fi
 
-__fzf_use_tmux__() {
-  [ -n "$TMUX_PANE" ] && [ "${FZF_TMUX:-1}" != 0 ] && [ ${LINES:-40} -gt 15 ]
-}
+# Required to refresh the prompt after fzf
+bind -m emacs-standard '"\er": redraw-current-line'
 
-[ $BASH_VERSINFO -gt 3 ] && __use_bind_x=1 || __use_bind_x=0
-__fzf_use_tmux__ && __use_tmux=1 || __use_tmux=0
-
-if [[ ! -o vi ]]; then
-  # Required to refresh the prompt after fzf
-  bind '"\er": redraw-current-line'
-  bind '"\e^": history-expand-line'
+bind -m vi-command '"\C-z": emacs-editing-mode'
+bind -m vi-insert '"\C-z": emacs-editing-mode'
+bind -m emacs-standard '"\C-z": vi-editing-mode'
 
+if (( BASH_VERSINFO[0] < 4 )); then
   # CTRL-T - Paste the selected file path into the command line
-  if [ $__use_bind_x -eq 1 ]; then
-    bind -x '"\C-t": "fzf-file-widget"'
-  elif [ $__use_tmux -eq 1 ]; then
-    bind '"\C-t": " \C-u \C-a\C-k$(__fzf_select_tmux__)\e\C-e\C-y\C-a\C-d\C-y\ey\C-h"'
-  else
-    bind '"\C-t": " \C-u \C-a\C-k$(__fzf_select__)\e\C-e\C-y\C-a\C-y\ey\C-h\C-e\er \C-h"'
-  fi
+  bind -m emacs-standard '"\C-t": " \C-b\C-k \C-u`__fzf_select__`\e\C-e\er\C-a\C-y\C-h\C-e\e \C-y\ey\C-x\C-x\C-f"'
+  bind -m vi-command '"\C-t": "\C-z\C-t\C-z"'
+  bind -m vi-insert '"\C-t": "\C-z\C-t\C-z"'
 
   # CTRL-R - Paste the selected command from history into the command line
-  bind '"\C-r": " \C-e\C-u`__fzf_history__`\e\C-e\e^\er"'
-
-  # ALT-C - cd into the selected directory
-  bind '"\ec": " \C-e\C-u`__fzf_cd__`\e\C-e\er\C-m"'
+  bind -m emacs-standard '"\C-r": "\C-e \C-u\C-y\ey\C-u`__fzf_history__`\e\C-e\er"'
+  bind -m vi-command '"\C-r": "\C-z\C-r\C-z"'
+  bind -m vi-insert '"\C-r": "\C-z\C-r\C-z"'
 else
-  # We'd usually use "\e" to enter vi-movement-mode so we can do our magic,
-  # but this incurs a very noticeable delay of a half second or so,
-  # because many other commands start with "\e".
-  # Instead, we bind an unused key, "\C-x\C-a",
-  # to also enter vi-movement-mode,
-  # and then use that thereafter.
-  # (We imagine that "\C-x\C-a" is relatively unlikely to be in use.)
-  bind '"\C-x\C-a": vi-movement-mode'
-
-  bind '"\C-x\C-e": shell-expand-line'
-  bind '"\C-x\C-r": redraw-current-line'
-  bind '"\C-x^": history-expand-line'
-
   # CTRL-T - Paste the selected file path into the command line
-  # - FIXME: Selected items are attached to the end regardless of cursor position
-  if [ $__use_bind_x -eq 1 ]; then
-    bind -x '"\C-t": "fzf-file-widget"'
-  elif [ $__use_tmux -eq 1 ]; then
-    bind '"\C-t": "\C-x\C-a$a \C-x\C-addi$(__fzf_select_tmux__)\C-x\C-e\C-x\C-a0P$xa"'
-  else
-    bind '"\C-t": "\C-x\C-a$a \C-x\C-addi$(__fzf_select__)\C-x\C-e\C-x\C-a0Px$a \C-x\C-r\C-x\C-axa "'
-  fi
-  bind -m vi-command '"\C-t": "i\C-t"'
+  bind -m emacs-standard -x '"\C-t": fzf-file-widget'
+  bind -m vi-command -x '"\C-t": fzf-file-widget'
+  bind -m vi-insert -x '"\C-t": fzf-file-widget'
 
   # CTRL-R - Paste the selected command from history into the command line
-  bind '"\C-r": "\C-x\C-addi$(__fzf_history__)\C-x\C-e\C-x^\C-x\C-a$a\C-x\C-r"'
-  bind -m vi-command '"\C-r": "i\C-r"'
-
-  # ALT-C - cd into the selected directory
-  bind '"\ec": "\C-x\C-addi$(__fzf_cd__)\C-x\C-e\C-x\C-r\C-m"'
-  bind -m vi-command '"\ec": "ddi$(__fzf_cd__)\C-x\C-e\C-x\C-r\C-m"'
+  bind -m emacs-standard -x '"\C-r": __fzf_history__'
+  bind -m vi-command -x '"\C-r": __fzf_history__'
+  bind -m vi-insert -x '"\C-r": __fzf_history__'
 fi
 
-unset -v __use_tmux __use_bind_x
-
-fi
+# ALT-C - cd into the selected directory
+bind -m emacs-standard '"\ec": " \C-b\C-k \C-u`__fzf_cd__`\e\C-e\er\C-m\C-y\C-h\e \C-y\ey\C-x\C-x\C-d"'
+bind -m vi-command '"\ec": "\C-z\ec\C-z"'
+bind -m vi-insert '"\ec": "\C-z\ec\C-z"'

shell/key-bindings.fish

@@ -1,58 +1,113 @@
+#     ____      ____
+#    / __/___  / __/
+#   / /_/_  / / /_
+#  / __/ / /_/ __/
+# /_/   /___/_/ key-bindings.fish
+#
+# - $FZF_TMUX_OPTS
+# - $FZF_CTRL_T_COMMAND
+# - $FZF_CTRL_T_OPTS
+# - $FZF_CTRL_R_OPTS
+# - $FZF_ALT_C_COMMAND
+# - $FZF_ALT_C_OPTS
+
+status is-interactive; or exit 0
+
+
 # Key bindings
 # ------------
 function fzf_key_bindings
-  # Due to a bug of fish, we cannot use command substitution,
-  # so we use temporary file instead
-  if [ -z "$TMPDIR" ]
-    set -g TMPDIR /tmp
-  end
 
-  function __fzf_escape
-    while read item
-      echo -n (echo -n "$item" | sed -E 's/([ "$~'\''([{<>})])/\\\\\\1/g')' '
+  # Store current token in $dir as root for the 'find' command
+  function fzf-file-widget -d "List files and folders"
+    set -l commandline (__fzf_parse_commandline)
+    set -l dir $commandline[1]
+    set -l fzf_query $commandline[2]
+    set -l prefix $commandline[3]
+
+    # "-path \$dir'*/.*'" matches hidden files/folders inside $dir but not
+    # $dir itself, even if hidden.
+    test -n "$FZF_CTRL_T_COMMAND"; or set -l FZF_CTRL_T_COMMAND "
+    command find -L \$dir -mindepth 1 \\( -path \$dir'*/.*' -o -fstype 'sysfs' -o -fstype 'devfs' -o -fstype 'devtmpfs' \\) -prune \
+    -o -type f -print \
+    -o -type d -print \
+    -o -type l -print 2> /dev/null | sed 's@^\./@@'"
+
+    test -n "$FZF_TMUX_HEIGHT"; or set FZF_TMUX_HEIGHT 40%
+    begin
+      set -lx FZF_DEFAULT_OPTS "--height $FZF_TMUX_HEIGHT --reverse --scheme=path --bind=ctrl-z:ignore $FZF_DEFAULT_OPTS $FZF_CTRL_T_OPTS"
+      eval "$FZF_CTRL_T_COMMAND | "(__fzfcmd)' -m --query "'$fzf_query'"' | while read -l r; set result $result $r; end
     end
+    if [ -z "$result" ]
+      commandline -f repaint
+      return
+    else
+      # Remove last token from commandline.
+      commandline -t ""
+    end
+    for i in $result
+      commandline -it -- $prefix
+      commandline -it -- (string escape $i)
+      commandline -it -- ' '
+    end
+    commandline -f repaint
   end
 
-  function fzf-file-widget
-    set -q FZF_CTRL_T_COMMAND; or set -l FZF_CTRL_T_COMMAND "
-    command find -L . \\( -path '*/\\.*' -o -fstype 'dev' -o -fstype 'proc' \\) -prune \
-      -o -type f -print \
-      -o -type d -print \
-      -o -type l -print 2> /dev/null | sed 1d | cut -b3-"
-    eval "$FZF_CTRL_T_COMMAND | "(__fzfcmd)" -m $FZF_CTRL_T_OPTS > $TMPDIR/fzf.result"
-    and for i in (seq 20); commandline -i (cat $TMPDIR/fzf.result | __fzf_escape) 2> /dev/null; and break; sleep 0.1; end
+  function fzf-history-widget -d "Show command history"
+    test -n "$FZF_TMUX_HEIGHT"; or set FZF_TMUX_HEIGHT 40%
+    begin
+      set -lx FZF_DEFAULT_OPTS "--height $FZF_TMUX_HEIGHT $FZF_DEFAULT_OPTS --scheme=history --bind=ctrl-r:toggle-sort,ctrl-z:ignore $FZF_CTRL_R_OPTS +m"
+
+      set -l FISH_MAJOR (echo $version | cut -f1 -d.)
+      set -l FISH_MINOR (echo $version | cut -f2 -d.)
+
+      # history's -z flag is needed for multi-line support.
+      # history's -z flag was added in fish 2.4.0, so don't use it for versions
+      # before 2.4.0.
+      if [ "$FISH_MAJOR" -gt 2 -o \( "$FISH_MAJOR" -eq 2 -a "$FISH_MINOR" -ge 4 \) ];
+        history -z | eval (__fzfcmd) --read0 --print0 -q '(commandline)' | read -lz result
+        and commandline -- $result
+      else
+        history | eval (__fzfcmd) -q '(commandline)' | read -l result
+        and commandline -- $result
+      end
+    end
     commandline -f repaint
-    rm -f $TMPDIR/fzf.result
   end
 
-  function fzf-history-widget
-    history | eval (__fzfcmd) +s +m --tiebreak=index --toggle-sort=ctrl-r $FZF_CTRL_R_OPTS > $TMPDIR/fzf.result
-    and commandline (cat $TMPDIR/fzf.result)
-    commandline -f repaint
-    rm -f $TMPDIR/fzf.result
-  end
+  function fzf-cd-widget -d "Change directory"
+    set -l commandline (__fzf_parse_commandline)
+    set -l dir $commandline[1]
+    set -l fzf_query $commandline[2]
+    set -l prefix $commandline[3]
+
+    test -n "$FZF_ALT_C_COMMAND"; or set -l FZF_ALT_C_COMMAND "
+    command find -L \$dir -mindepth 1 \\( -path \$dir'*/.*' -o -fstype 'sysfs' -o -fstype 'devfs' -o -fstype 'devtmpfs' \\) -prune \
+    -o -type d -print 2> /dev/null | sed 's@^\./@@'"
+    test -n "$FZF_TMUX_HEIGHT"; or set FZF_TMUX_HEIGHT 40%
+    begin
+      set -lx FZF_DEFAULT_OPTS "--height $FZF_TMUX_HEIGHT --reverse --scheme=path --bind=ctrl-z:ignore $FZF_DEFAULT_OPTS $FZF_ALT_C_OPTS"
+      eval "$FZF_ALT_C_COMMAND | "(__fzfcmd)' +m --query "'$fzf_query'"' | read -l result
+
+      if [ -n "$result" ]
+        cd -- $result
+
+        # Remove last token from commandline.
+        commandline -t ""
+        commandline -it -- $prefix
+      end
+    end
 
-  function fzf-cd-widget
-    set -q FZF_ALT_C_COMMAND; or set -l FZF_ALT_C_COMMAND "
-    command find -L . \\( -path '*/\\.*' -o -fstype 'dev' -o -fstype 'proc' \\) -prune \
-      -o -type d -print 2> /dev/null | sed 1d | cut -b3-"
-    # Fish hangs if the command before pipe redirects (2> /dev/null)
-    eval "$FZF_ALT_C_COMMAND | "(__fzfcmd)" +m $FZF_ALT_C_OPTS > $TMPDIR/fzf.result"
-    [ (cat $TMPDIR/fzf.result | wc -l) -gt 0 ]
-    and cd (cat $TMPDIR/fzf.result)
     commandline -f repaint
-    rm -f $TMPDIR/fzf.result
   end
 
   function __fzfcmd
-    set -q FZF_TMUX; or set FZF_TMUX 1
-
-    if [ $FZF_TMUX -eq 1 ]
-      if set -q FZF_TMUX_HEIGHT
-        echo "fzf-tmux -d$FZF_TMUX_HEIGHT"
-      else
-        echo "fzf-tmux -d40%"
-      end
+    test -n "$FZF_TMUX"; or set FZF_TMUX 0
+    test -n "$FZF_TMUX_HEIGHT"; or set FZF_TMUX_HEIGHT 40%
+    if [ -n "$FZF_TMUX_OPTS" ]
+      echo "fzf-tmux $FZF_TMUX_OPTS -- "
+    else if [ $FZF_TMUX -eq 1 ]
+      echo "fzf-tmux -d$FZF_TMUX_HEIGHT -- "
     else
       echo "fzf"
     end
@@ -67,5 +122,54 @@ function fzf_key_bindings
     bind -M insert \cr fzf-history-widget
     bind -M insert \ec fzf-cd-widget
   end
-end
 
+  function __fzf_parse_commandline -d 'Parse the current command line token and return split of existing filepath, fzf query, and optional -option= prefix'
+    set -l commandline (commandline -t)
+
+    # strip -option= from token if present
+    set -l prefix (string match -r -- '^-[^\s=]+=' $commandline)
+    set commandline (string replace -- "$prefix" '' $commandline)
+
+    # eval is used to do shell expansion on paths
+    eval set commandline $commandline
+
+    if [ -z $commandline ]
+      # Default to current directory with no --query
+      set dir '.'
+      set fzf_query ''
+    else
+      set dir (__fzf_get_dir $commandline)
+
+      if [ "$dir" = "." -a (string sub -l 1 -- $commandline) != '.' ]
+        # if $dir is "." but commandline is not a relative path, this means no file path found
+        set fzf_query $commandline
+      else
+        # Also remove trailing slash after dir, to "split" input properly
+        set fzf_query (string replace -r "^$dir/?" -- '' "$commandline")
+      end
+    end
+
+    echo $dir
+    echo $fzf_query
+    echo $prefix
+  end
+
+  function __fzf_get_dir -d 'Find the longest existing filepath from input string'
+    set dir $argv
+
+    # Strip all trailing slashes. Ignore if $dir is root dir (/)
+    if [ (string length -- $dir) -gt 1 ]
+      set dir (string replace -r '/*$' -- '' $dir)
+    end
+
+    # Iteratively check if dir exists and strip tail end of path
+    while [ ! -d "$dir" ]
+      # If path is absolute, this can keep going until ends up at /
+      # If path is relative, this can keep going until entire input is consumed, dirname returns "."
+      set dir (dirname -- "$dir")
+    end
+
+    echo $dir
+  end
+
+end

shell/key-bindings.zsh

@@ -1,55 +1,123 @@
+#     ____      ____
+#    / __/___  / __/
+#   / /_/_  / / /_
+#  / __/ / /_/ __/
+# /_/   /___/_/ key-bindings.zsh
+#
+# - $FZF_TMUX_OPTS
+# - $FZF_CTRL_T_COMMAND
+# - $FZF_CTRL_T_OPTS
+# - $FZF_CTRL_R_OPTS
+# - $FZF_ALT_C_COMMAND
+# - $FZF_ALT_C_OPTS
+
+[[ -o interactive ]] || return 0
+
+
 # Key bindings
 # ------------
-if [[ $- == *i* ]]; then
+
+# The code at the top and the bottom of this file is the same as in completion.zsh.
+# Refer to that file for explanation.
+if 'zmodload' 'zsh/parameter' 2>'/dev/null' && (( ${+options} )); then
+  __fzf_key_bindings_options="options=(${(j: :)${(kv)options[@]}})"
+else
+  () {
+    __fzf_key_bindings_options="setopt"
+    'local' '__fzf_opt'
+    for __fzf_opt in "${(@)${(@f)$(set -o)}%% *}"; do
+      if [[ -o "$__fzf_opt" ]]; then
+        __fzf_key_bindings_options+=" -o $__fzf_opt"
+      else
+        __fzf_key_bindings_options+=" +o $__fzf_opt"
+      fi
+    done
+  }
+fi
+
+'builtin' 'emulate' 'zsh' && 'builtin' 'setopt' 'no_aliases'
+
+{
 
 # CTRL-T - Paste the selected file path(s) into the command line
 __fsel() {
-  local cmd="${FZF_CTRL_T_COMMAND:-"command find -L . \\( -path '*/\\.*' -o -fstype 'dev' -o -fstype 'proc' \\) -prune \
+  local cmd="${FZF_CTRL_T_COMMAND:-"command find -L . -mindepth 1 \\( -path '*/.*' -o -fstype 'sysfs' -o -fstype 'devfs' -o -fstype 'devtmpfs' -o -fstype 'proc' \\) -prune \
     -o -type f -print \
     -o -type d -print \
-    -o -type l -print 2> /dev/null | sed 1d | cut -b3-"}"
-  eval "$cmd | $(__fzfcmd) -m $FZF_CTRL_T_OPTS" | while read item; do
+    -o -type l -print 2> /dev/null | cut -b3-"}"
+  setopt localoptions pipefail no_aliases 2> /dev/null
+  local item
+  eval "$cmd" | FZF_DEFAULT_OPTS="--height ${FZF_TMUX_HEIGHT:-40%} --reverse --scheme=path --bind=ctrl-z:ignore ${FZF_DEFAULT_OPTS-} ${FZF_CTRL_T_OPTS-}" $(__fzfcmd) -m "$@" | while read item; do
     echo -n "${(q)item} "
   done
+  local ret=$?
   echo
+  return $ret
 }
 
 __fzfcmd() {
-  [ ${FZF_TMUX:-1} -eq 1 ] && echo "fzf-tmux -d${FZF_TMUX_HEIGHT:-40%}" || echo "fzf"
+  [ -n "${TMUX_PANE-}" ] && { [ "${FZF_TMUX:-0}" != 0 ] || [ -n "${FZF_TMUX_OPTS-}" ]; } &&
+    echo "fzf-tmux ${FZF_TMUX_OPTS:--d${FZF_TMUX_HEIGHT:-40%}} -- " || echo "fzf"
 }
 
 fzf-file-widget() {
   LBUFFER="${LBUFFER}$(__fsel)"
-  zle redisplay
+  local ret=$?
+  zle reset-prompt
+  return $ret
 }
-zle     -N   fzf-file-widget
-bindkey '^T' fzf-file-widget
+zle     -N            fzf-file-widget
+bindkey -M emacs '^T' fzf-file-widget
+bindkey -M vicmd '^T' fzf-file-widget
+bindkey -M viins '^T' fzf-file-widget
 
 # ALT-C - cd into the selected directory
 fzf-cd-widget() {
-  local cmd="${FZF_ALT_C_COMMAND:-"command find -L . \\( -path '*/\\.*' -o -fstype 'dev' -o -fstype 'proc' \\) -prune \
-    -o -type d -print 2> /dev/null | sed 1d | cut -b3-"}"
-  cd "${$(eval "$cmd | $(__fzfcmd) +m $FZF_ALT_C_OPTS"):-.}"
+  local cmd="${FZF_ALT_C_COMMAND:-"command find -L . -mindepth 1 \\( -path '*/.*' -o -fstype 'sysfs' -o -fstype 'devfs' -o -fstype 'devtmpfs' -o -fstype 'proc' \\) -prune \
+    -o -type d -print 2> /dev/null | cut -b3-"}"
+  setopt localoptions pipefail no_aliases 2> /dev/null
+  local dir="$(eval "$cmd" | FZF_DEFAULT_OPTS="--height ${FZF_TMUX_HEIGHT:-40%} --reverse --scheme=path --bind=ctrl-z:ignore ${FZF_DEFAULT_OPTS-} ${FZF_ALT_C_OPTS-}" $(__fzfcmd) +m)"
+  if [[ -z "$dir" ]]; then
+    zle redisplay
+    return 0
+  fi
+  zle push-line # Clear buffer. Auto-restored on next prompt.
+  BUFFER="builtin cd -- ${(q)dir}"
+  zle accept-line
+  local ret=$?
+  unset dir # ensure this doesn't end up appearing in prompt expansion
   zle reset-prompt
+  return $ret
 }
-zle     -N    fzf-cd-widget
-bindkey '\ec' fzf-cd-widget
+zle     -N             fzf-cd-widget
+bindkey -M emacs '\ec' fzf-cd-widget
+bindkey -M vicmd '\ec' fzf-cd-widget
+bindkey -M viins '\ec' fzf-cd-widget
 
 # CTRL-R - Paste the selected command from history into the command line
 fzf-history-widget() {
   local selected num
-  setopt localoptions noglobsubst
-  selected=( $(fc -l 1 | eval "$(__fzfcmd) +s --tac +m -n2..,.. --tiebreak=index --toggle-sort=ctrl-r $FZF_CTRL_R_OPTS -q ${(q)LBUFFER}") )
+  setopt localoptions noglobsubst noposixbuiltins pipefail no_aliases 2> /dev/null
+  selected="$(fc -rl 1 | awk '{ cmd=$0; sub(/^[ \t]*[0-9]+\**[ \t]+/, "", cmd); if (!seen[cmd]++) print $0 }' |
+    FZF_DEFAULT_OPTS="--height ${FZF_TMUX_HEIGHT:-40%} ${FZF_DEFAULT_OPTS-} -n2..,.. --scheme=history --bind=ctrl-r:toggle-sort,ctrl-z:ignore ${FZF_CTRL_R_OPTS-} --query=${(qqq)LBUFFER} +m" $(__fzfcmd))"
+  local ret=$?
   if [ -n "$selected" ]; then
-    num=$selected[1]
-    if [ -n "$num" ]; then
-      zle vi-fetch-history -n $num
+    num=$(awk '{print $1}' <<< "$selected")
+    if [[ "$num" =~ '^[1-9][0-9]*\*?$' ]]; then
+      zle vi-fetch-history -n ${num%\*}
+    else # selected is a custom query, not from history
+      LBUFFER="$selected"
     fi
   fi
-  zle redisplay
+  zle reset-prompt
+  return $ret
 }
-zle     -N   fzf-history-widget
-bindkey '^R' fzf-history-widget
-
-fi
+zle     -N            fzf-history-widget
+bindkey -M emacs '^R' fzf-history-widget
+bindkey -M vicmd '^R' fzf-history-widget
+bindkey -M viins '^R' fzf-history-widget
 
+} always {
+  eval $__fzf_key_bindings_options
+  'unset' '__fzf_key_bindings_options'
+}

src/Dockerfile.android

@@ -1,40 +0,0 @@
-FROM ubuntu:14.04
-MAINTAINER Junegunn Choi <junegunn.c@gmail.com>
-
-# apt-get
-RUN apt-get update && apt-get -y upgrade && \
-    apt-get install -y --force-yes git curl build-essential
-
-# Install Go 1.4
-RUN cd / && curl \
-    https://storage.googleapis.com/golang/go1.4.2.linux-amd64.tar.gz | \
-    tar -xz && mv go go1.4 && \
-    sed -i 's@#define PTHREAD_KEYS_MAX 128@@' /go1.4/src/runtime/cgo/gcc_android_arm.c
-
-ENV GOROOT /go1.4
-ENV PATH /go1.4/bin:$PATH
-
-RUN cd / && \
-    curl -O http://dl.google.com/android/ndk/android-ndk-r10e-linux-x86_64.bin && \
-    chmod 755 /android-ndk* && /android-ndk-r10e-linux-x86_64.bin && \
-    mv android-ndk-r10e /android-ndk
-
-RUN cd /android-ndk && bash ./build/tools/make-standalone-toolchain.sh --platform=android-21 --install-dir=/ndk --arch=arm
-
-ENV NDK_CC /ndk/bin/arm-linux-androideabi-gcc
-
-RUN cd $GOROOT/src && \
-    CC_FOR_TARGET=$NDK_CC GOOS=android GOARCH=arm GOARM=7 ./make.bash
-
-RUN cd / && curl \
-    http://ftp.gnu.org/gnu/ncurses/ncurses-5.9.tar.gz | \
-    tar -xz && cd /ncurses-5.9 && \
-    ./configure CC=$NDK_CC CFLAGS="-fPIE -march=armv7-a -mfpu=neon -mhard-float -Wl,--no-warn-mismatch" LDFLAGS="-march=armv7-a -Wl,--no-warn-mismatch" --host=arm-linux --enable-overwrite --enable-const --without-cxx-binding  --without-shared --without-debug --enable-widec --enable-ext-colors --enable-ext-mouse --enable-pc-files --with-pkg-config-libdir=$PKG_CONFIG_LIBDIR --without-manpages --without-ada --disable-shared --without-tests --prefix=/ndk/sysroot/usr --with-default-terminfo-dirs=/usr/share/terminfo --with-terminfo-dirs=/usr/share/terminfo ac_cv_header_locale_h=n ac_cv_func_getpwent=no ac_cv_func_getpwnam=no ac_cv_func_getpwuid=no && \
-    sed -i 's@#define HAVE_LOCALE_H 1@/* #undef HAVE_LOCALE_H */@' include/ncurses_cfg.h && \
-    make && \
-    sed -i '0,/echo.*/{s/echo.*/exit 0/}' misc/run_tic.sh && \
-    make install && \
-    mv /ndk/sysroot/usr/lib/libncursesw.a /ndk/sysroot/usr/lib/libncurses.a
-
-# Default CMD
-CMD cd /fzf/src && /bin/bash

src/Dockerfile.arch

@@ -1,24 +0,0 @@
-FROM base/archlinux:2014.07.03
-MAINTAINER Junegunn Choi <junegunn.c@gmail.com>
-
-# apt-get
-RUN pacman-key --populate archlinux && pacman-key --refresh-keys
-RUN pacman-db-upgrade && pacman -Syu --noconfirm base-devel git
-
-# Install Go 1.4
-RUN cd / && curl \
-    https://storage.googleapis.com/golang/go1.4.2.linux-amd64.tar.gz | \
-    tar -xz && mv go go1.4
-
-ENV GOROOT /go1.4
-ENV PATH /go1.4/bin:$PATH
-
-# For i386 build
-RUN echo '[multilib]' >> /etc/pacman.conf && \
-    echo 'Include = /etc/pacman.d/mirrorlist' >> /etc/pacman.conf && \
-    pacman-db-upgrade && yes | pacman -Sy gcc-multilib lib32-ncurses && \
-    cd $GOROOT/src && GOARCH=386 ./make.bash
-
-# Default CMD
-CMD cd /fzf/src && /bin/bash
-

src/Dockerfile.centos

@@ -1,32 +0,0 @@
-FROM centos:centos6
-MAINTAINER Junegunn Choi <junegunn.c@gmail.com>
-
-# yum
-RUN yum install -y git gcc make tar glibc-devel glibc-devel.i686 \
-    ncurses-devel ncurses-static ncurses-devel.i686 \
-    gpm-devel gpm-static libgcc.i686
-
-# Install Go 1.4
-RUN cd / && curl \
-    https://storage.googleapis.com/golang/go1.4.2.linux-amd64.tar.gz | \
-    tar -xz && mv go go1.4
-
-# Install Go 1.5
-RUN cd / && curl \
-    https://storage.googleapis.com/golang/go1.5.3.linux-amd64.tar.gz | \
-    tar -xz && mv go go1.5
-
-# Install RPMs for building static 32-bit binary
-RUN curl ftp://ftp.pbone.net/mirror/ftp.centos.org/6.7/os/i386/Packages/ncurses-static-5.7-4.20090207.el6.i686.rpm -o rpm && rpm -i rpm && \
-    curl ftp://ftp.pbone.net/mirror/ftp.centos.org/6.7/os/i386/Packages/gpm-static-1.20.6-12.el6.i686.rpm -o rpm && rpm -i rpm
-
-ENV GOROOT_BOOTSTRAP /go1.4
-ENV GOROOT /go1.5
-ENV PATH /go1.5/bin:$PATH
-
-# For i386 build
-RUN cd $GOROOT/src && GOARCH=386 ./make.bash
-
-# Default CMD
-CMD cd /fzf/src && /bin/bash
-

src/Dockerfile.ubuntu

@@ -1,22 +0,0 @@
-FROM ubuntu:14.04
-MAINTAINER Junegunn Choi <junegunn.c@gmail.com>
-
-# apt-get
-RUN apt-get update && apt-get -y upgrade && \
-    apt-get install -y --force-yes git curl build-essential libncurses-dev libgpm-dev
-
-# Install Go 1.4
-RUN cd / && curl \
-    https://storage.googleapis.com/golang/go1.4.2.linux-amd64.tar.gz | \
-    tar -xz && mv go go1.4
-
-ENV GOROOT /go1.4
-ENV PATH /go1.4/bin:$PATH
-
-# For i386 build
-RUN apt-get install -y lib32ncurses5-dev && \
-    cd $GOROOT/src && GOARCH=386 ./make.bash
-
-# Default CMD
-CMD cd /fzf/src && /bin/bash
-

src/LICENSE

@@ -1,6 +1,6 @@
 The MIT License (MIT)
 
-Copyright (c) 2016 Junegunn Choi
+Copyright (c) 2013-2024 Junegunn Choi
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

src/Makefile

@@ -1,116 +0,0 @@
-ifndef GOOS
-UNAME_S := $(shell uname -s)
-ifeq ($(UNAME_S),Darwin)
-	GOOS := darwin
-else ifeq ($(UNAME_S),Linux)
-	GOOS := linux
-endif
-endif
-
-SOURCES     := $(wildcard *.go */*.go)
-ROOTDIR     := $(shell dirname $(realpath $(lastword $(MAKEFILE_LIST))))
-BINDIR      := $(shell dirname $(ROOTDIR))/bin
-GOPATH      := $(shell dirname $(ROOTDIR))/gopath
-SRCDIR      := $(GOPATH)/src/github.com/junegunn/fzf/src
-DOCKEROPTS  := -i -t -v $(ROOTDIR):/fzf/src
-BINARY32    := fzf-$(GOOS)_386
-BINARY64    := fzf-$(GOOS)_amd64
-BINARYARM7  := fzf-$(GOOS)_arm7
-VERSION     := $(shell awk -F= '/version =/ {print $$2}' constants.go | tr -d "\" ")
-RELEASE32   := fzf-$(VERSION)-$(GOOS)_386
-RELEASE64   := fzf-$(VERSION)-$(GOOS)_amd64
-RELEASEARM7 := fzf-$(VERSION)-$(GOOS)_arm7
-export GOPATH
-
-UNAME_M := $(shell uname -m)
-ifeq ($(UNAME_M),x86_64)
-	BINARY := $(BINARY64)
-else ifeq ($(UNAME_M),i686)
-	BINARY := $(BINARY32)
-else
-$(error "Build on $(UNAME_M) is not supported, yet.")
-endif
-
-all: fzf/$(BINARY)
-
-release: test fzf/$(BINARY32) fzf/$(BINARY64)
-	-cd fzf && cp $(BINARY32) $(RELEASE32) && tar -czf $(RELEASE32).tgz $(RELEASE32)
-	cd fzf && cp $(BINARY64) $(RELEASE64) && tar -czf $(RELEASE64).tgz $(RELEASE64) && \
-	rm -f $(RELEASE32) $(RELEASE64)
-
-$(SRCDIR):
-	mkdir -p $(shell dirname $(SRCDIR))
-	ln -s $(ROOTDIR) $(SRCDIR)
-
-deps: $(SRCDIR) $(SOURCES)
-	cd $(SRCDIR) && go get
-
-android-build: $(SRCDIR)
-	cd $(SRCDIR) && GOARCH=arm GOARM=7 CGO_ENABLED=1 go get
-	cd $(SRCDIR)/fzf && GOARCH=arm GOARM=7 CGO_ENABLED=1 go build -a -ldflags="-w -extldflags=-pie" -o $(BINARYARM7)
-	cd $(SRCDIR)/fzf && cp $(BINARYARM7) $(RELEASEARM7) && tar -czf $(RELEASEARM7).tgz $(RELEASEARM7) && \
-	rm -f $(RELEASEARM7)
-
-test: deps
-	SHELL=/bin/sh go test -v ./...
-
-install: $(BINDIR)/fzf
-
-uninstall:
-	rm -f $(BINDIR)/fzf $(BINDIR)/$(BINARY)
-
-clean:
-	cd fzf && rm -f fzf-*
-
-fzf/$(BINARY32): deps
-	cd fzf && GOARCH=386 CGO_ENABLED=1 go build -a -ldflags -w -tags "$(TAGS)" -o $(BINARY32)
-
-fzf/$(BINARY64): deps
-	cd fzf && go build -a -ldflags -w -tags "$(TAGS)" -o $(BINARY64)
-
-$(BINDIR)/fzf: fzf/$(BINARY) | $(BINDIR)
-	cp -f fzf/$(BINARY) $(BINDIR)
-	cd $(BINDIR) && ln -sf $(BINARY) fzf
-
-$(BINDIR):
-	mkdir -p $@
-
-docker-arch:
-	docker build -t junegunn/arch-sandbox - < Dockerfile.arch
-
-docker-ubuntu:
-	docker build -t junegunn/ubuntu-sandbox - < Dockerfile.ubuntu
-
-docker-centos:
-	docker build -t junegunn/centos-sandbox - < Dockerfile.centos
-
-docker-android:
-	docker build -t junegunn/android-sandbox - < Dockerfile.android
-
-arch: docker-arch
-	docker run $(DOCKEROPTS) junegunn/$@-sandbox \
-		sh -c 'cd /fzf/src; /bin/bash'
-
-ubuntu: docker-ubuntu
-	docker run $(DOCKEROPTS) junegunn/$@-sandbox \
-		sh -c 'cd /fzf/src; /bin/bash'
-
-centos: docker-centos
-	docker run $(DOCKEROPTS) junegunn/$@-sandbox \
-		sh -c 'cd /fzf/src; /bin/bash'
-
-linux: docker-centos
-	docker run $(DOCKEROPTS) junegunn/centos-sandbox \
-		/bin/bash -ci 'cd /fzf/src; make TAGS=static release'
-
-ubuntu-android: docker-android
-	docker run $(DOCKEROPTS) junegunn/android-sandbox \
-		sh -c 'cd /fzf/src; /bin/bash'
-
-android: docker-android
-	docker run $(DOCKEROPTS) junegunn/android-sandbox \
-		/bin/bash -ci 'cd /fzf/src; GOOS=android make android-build'
-
-.PHONY: all deps release test install uninstall clean \
-	linux arch ubuntu centos docker-arch docker-ubuntu docker-centos \
-	android-build docker-android ubuntu-android android

src/README.md

@@ -1,121 +0,0 @@
-fzf in Go
-=========
-
-<img src="https://cloud.githubusercontent.com/assets/700826/5725028/028ea834-9b93-11e4-9198-43088c3f295d.gif" height="463" alt="fzf in go">
-
-This directory contains the source code for the new fzf implementation in
-[Go][go].
-
-Upgrade from Ruby version
--------------------------
-
-The install script has been updated to download the right binary for your
-system. If you already have installed fzf, simply git-pull the repository and
-rerun the install script.
-
-```sh
-cd ~/.fzf
-git pull
-./install
-```
-
-Otherwise, follow [the instruction][install] as before. You can also install
-fzf using Homebrew if you prefer that way.
-
-Motivations
------------
-
-### No Ruby dependency
-
-There have always been complaints about fzf being a Ruby script. To make
-matters worse, Ruby 2.1 removed ncurses binding from its standard libary.
-Because of the change, users running Ruby 2.1 or above are forced to build C
-extensions of curses gem to meet the requirement of fzf. The new Go version
-will be distributed as an executable binary so it will be much more accessible
-and should be easier to setup.
-
-### Performance
-
-Many people have been surprised to see how fast fzf is even when it was
-written in Ruby. It stays quite responsive even for 100k+ lines, which is
-well above the size of the usual input.
-
-The new Go version, of course, is significantly faster than that. It has all
-the performance optimization techniques used in Ruby implementation and more.
-It also doesn't suffer from [GIL][gil], so the search performance scales
-proportional to the number of CPU cores. On my MacBook Pro (Mid 2012), the new
-version was shown to be an order of magnitude faster on certain cases. It also
-starts much faster though the difference may not be noticeable.
-
-Differences with Ruby version
------------------------------
-
-The Go version is designed to be perfectly compatible with the previous Ruby
-version. The only behavioral difference is that the new version ignores the
-numeric argument to `--sort=N` option and always sorts the result regardless
-of the number of matches. The value was introduced to limit the response time
-of the query, but the Go version is blazingly fast (almost instant response
-even for 1M+ items) so I decided that it's no longer required.
-
-System requirements
--------------------
-
-Currently, prebuilt binaries are provided only for OS X and Linux. The install
-script will fall back to the legacy Ruby version on the other systems, but if
-you have Go 1.4 installed, you can try building it yourself.
-
-However, as pointed out in [golang.org/doc/install][req], the Go version may
-not run on CentOS/RHEL 5.x, and if that's the case, the install script will
-choose the Ruby version instead.
-
-The Go version depends on [ncurses][ncurses] and some Unix system calls, so it
-shouldn't run natively on Windows at the moment. But it won't be impossible to
-support Windows by falling back to a cross-platform alternative such as
-[termbox][termbox] only on Windows. If you're interested in making fzf work on
-Windows, please let me know.
-
-Build
------
-
-```sh
-# Build fzf executables and tarballs
-make release
-
-# Install the executable to ../bin directory
-make install
-
-# Build executables and tarballs for Linux using Docker
-make linux
-```
-
-Contribution
-------------
-
-For the time being, I will not add or accept any new features until we can be
-sure that the implementation is stable and we have a sufficient number of test
-cases. However, fixes for obvious bugs and new test cases are welcome.
-
-I also care much about the performance of the implementation, so please make
-sure that your change does not result in performance regression. And please be
-noted that we don't have a quantitative measure of the performance yet.
-
-Third-party libraries used
---------------------------
-
-- [ncurses][ncurses]
-- [mattn/go-runewidth](https://github.com/mattn/go-runewidth)
-    - Licensed under [MIT](http://mattn.mit-license.org/2013)
-- [mattn/go-shellwords](https://github.com/mattn/go-shellwords)
-    - Licensed under [MIT](http://mattn.mit-license.org/2014)
-
-License
--------
-
-[MIT](LICENSE)
-
-[install]: https://github.com/junegunn/fzf#installation
-[go]:      https://golang.org/
-[gil]:     http://en.wikipedia.org/wiki/Global_Interpreter_Lock
-[ncurses]: https://www.gnu.org/software/ncurses/
-[req]:     http://golang.org/doc/install
-[termbox]: https://github.com/nsf/termbox-go

src/actiontype_string.go

@@ -0,0 +1,129 @@
+// Code generated by "stringer -type=actionType"; DO NOT EDIT.
+
+package fzf
+
+import "strconv"
+
+func _() {
+	// An "invalid array index" compiler error signifies that the constant values have changed.
+	// Re-run the stringer command to generate them again.
+	var x [1]struct{}
+	_ = x[actIgnore-0]
+	_ = x[actStart-1]
+	_ = x[actClick-2]
+	_ = x[actInvalid-3]
+	_ = x[actChar-4]
+	_ = x[actMouse-5]
+	_ = x[actBeginningOfLine-6]
+	_ = x[actAbort-7]
+	_ = x[actAccept-8]
+	_ = x[actAcceptNonEmpty-9]
+	_ = x[actAcceptOrPrintQuery-10]
+	_ = x[actBackwardChar-11]
+	_ = x[actBackwardDeleteChar-12]
+	_ = x[actBackwardDeleteCharEof-13]
+	_ = x[actBackwardWord-14]
+	_ = x[actCancel-15]
+	_ = x[actChangeBorderLabel-16]
+	_ = x[actChangeHeader-17]
+	_ = x[actChangePreviewLabel-18]
+	_ = x[actChangePrompt-19]
+	_ = x[actChangeQuery-20]
+	_ = x[actClearScreen-21]
+	_ = x[actClearQuery-22]
+	_ = x[actClearSelection-23]
+	_ = x[actClose-24]
+	_ = x[actDeleteChar-25]
+	_ = x[actDeleteCharEof-26]
+	_ = x[actEndOfLine-27]
+	_ = x[actForwardChar-28]
+	_ = x[actForwardWord-29]
+	_ = x[actKillLine-30]
+	_ = x[actKillWord-31]
+	_ = x[actUnixLineDiscard-32]
+	_ = x[actUnixWordRubout-33]
+	_ = x[actYank-34]
+	_ = x[actBackwardKillWord-35]
+	_ = x[actSelectAll-36]
+	_ = x[actDeselectAll-37]
+	_ = x[actToggle-38]
+	_ = x[actToggleSearch-39]
+	_ = x[actToggleAll-40]
+	_ = x[actToggleDown-41]
+	_ = x[actToggleUp-42]
+	_ = x[actToggleIn-43]
+	_ = x[actToggleOut-44]
+	_ = x[actToggleTrack-45]
+	_ = x[actToggleHeader-46]
+	_ = x[actTrack-47]
+	_ = x[actDown-48]
+	_ = x[actUp-49]
+	_ = x[actPageUp-50]
+	_ = x[actPageDown-51]
+	_ = x[actPosition-52]
+	_ = x[actHalfPageUp-53]
+	_ = x[actHalfPageDown-54]
+	_ = x[actOffsetUp-55]
+	_ = x[actOffsetDown-56]
+	_ = x[actJump-57]
+	_ = x[actJumpAccept-58]
+	_ = x[actPrintQuery-59]
+	_ = x[actRefreshPreview-60]
+	_ = x[actReplaceQuery-61]
+	_ = x[actToggleSort-62]
+	_ = x[actShowPreview-63]
+	_ = x[actHidePreview-64]
+	_ = x[actTogglePreview-65]
+	_ = x[actTogglePreviewWrap-66]
+	_ = x[actTransform-67]
+	_ = x[actTransformBorderLabel-68]
+	_ = x[actTransformHeader-69]
+	_ = x[actTransformPreviewLabel-70]
+	_ = x[actTransformPrompt-71]
+	_ = x[actTransformQuery-72]
+	_ = x[actPreview-73]
+	_ = x[actChangePreview-74]
+	_ = x[actChangePreviewWindow-75]
+	_ = x[actPreviewTop-76]
+	_ = x[actPreviewBottom-77]
+	_ = x[actPreviewUp-78]
+	_ = x[actPreviewDown-79]
+	_ = x[actPreviewPageUp-80]
+	_ = x[actPreviewPageDown-81]
+	_ = x[actPreviewHalfPageUp-82]
+	_ = x[actPreviewHalfPageDown-83]
+	_ = x[actPrevHistory-84]
+	_ = x[actPrevSelected-85]
+	_ = x[actPut-86]
+	_ = x[actNextHistory-87]
+	_ = x[actNextSelected-88]
+	_ = x[actExecute-89]
+	_ = x[actExecuteSilent-90]
+	_ = x[actExecuteMulti-91]
+	_ = x[actSigStop-92]
+	_ = x[actFirst-93]
+	_ = x[actLast-94]
+	_ = x[actReload-95]
+	_ = x[actReloadSync-96]
+	_ = x[actDisableSearch-97]
+	_ = x[actEnableSearch-98]
+	_ = x[actSelect-99]
+	_ = x[actDeselect-100]
+	_ = x[actUnbind-101]
+	_ = x[actRebind-102]
+	_ = x[actBecome-103]
+	_ = x[actResponse-104]
+	_ = x[actShowHeader-105]
+	_ = x[actHideHeader-106]
+}
+
+const _actionType_name = "actIgnoreactStartactClickactInvalidactCharactMouseactBeginningOfLineactAbortactAcceptactAcceptNonEmptyactAcceptOrPrintQueryactBackwardCharactBackwardDeleteCharactBackwardDeleteCharEofactBackwardWordactCancelactChangeBorderLabelactChangeHeaderactChangePreviewLabelactChangePromptactChangeQueryactClearScreenactClearQueryactClearSelectionactCloseactDeleteCharactDeleteCharEofactEndOfLineactForwardCharactForwardWordactKillLineactKillWordactUnixLineDiscardactUnixWordRuboutactYankactBackwardKillWordactSelectAllactDeselectAllactToggleactToggleSearchactToggleAllactToggleDownactToggleUpactToggleInactToggleOutactToggleTrackactToggleHeaderactTrackactDownactUpactPageUpactPageDownactPositionactHalfPageUpactHalfPageDownactOffsetUpactOffsetDownactJumpactJumpAcceptactPrintQueryactRefreshPreviewactReplaceQueryactToggleSortactShowPreviewactHidePreviewactTogglePreviewactTogglePreviewWrapactTransformactTransformBorderLabelactTransformHeaderactTransformPreviewLabelactTransformPromptactTransformQueryactPreviewactChangePreviewactChangePreviewWindowactPreviewTopactPreviewBottomactPreviewUpactPreviewDownactPreviewPageUpactPreviewPageDownactPreviewHalfPageUpactPreviewHalfPageDownactPrevHistoryactPrevSelectedactPutactNextHistoryactNextSelectedactExecuteactExecuteSilentactExecuteMultiactSigStopactFirstactLastactReloadactReloadSyncactDisableSearchactEnableSearchactSelectactDeselectactUnbindactRebindactBecomeactResponseactShowHeaderactHideHeader"
+
+var _actionType_index = [...]uint16{0, 9, 17, 25, 35, 42, 50, 68, 76, 85, 102, 123, 138, 159, 183, 198, 207, 227, 242, 263, 278, 292, 306, 319, 336, 344, 357, 373, 385, 399, 413, 424, 435, 453, 470, 477, 496, 508, 522, 531, 546, 558, 571, 582, 593, 605, 619, 634, 642, 649, 654, 663, 674, 685, 698, 713, 724, 737, 744, 757, 770, 787, 802, 815, 829, 843, 859, 879, 891, 914, 932, 956, 974, 991, 1001, 1017, 1039, 1052, 1068, 1080, 1094, 1110, 1128, 1148, 1170, 1184, 1199, 1205, 1219, 1234, 1244, 1260, 1275, 1285, 1293, 1300, 1309, 1322, 1338, 1353, 1362, 1373, 1382, 1391, 1400, 1411, 1424, 1437}
+
+func (i actionType) String() string {
+	if i < 0 || i >= actionType(len(_actionType_index)-1) {
+		return "actionType(" + strconv.FormatInt(int64(i), 10) + ")"
+	}
+	return _actionType_name[_actionType_index[i]:_actionType_index[i+1]]
+}

src/algo/algo_test.go

@@ -1,95 +1,198 @@
 package algo
 
 import (
+	"math"
+	"sort"
 	"strings"
 	"testing"
+
+	"github.com/junegunn/fzf/src/util"
 )
 
-func assertMatch(t *testing.T, fun func(bool, bool, []rune, []rune) Result, caseSensitive, forward bool, input, pattern string, sidx int32, eidx int32, bonus int32) {
+func assertMatch(t *testing.T, fun Algo, caseSensitive, forward bool, input, pattern string, sidx int, eidx int, score int) {
+	assertMatch2(t, fun, caseSensitive, false, forward, input, pattern, sidx, eidx, score)
+}
+
+func assertMatch2(t *testing.T, fun Algo, caseSensitive, normalize, forward bool, input, pattern string, sidx int, eidx int, score int) {
 	if !caseSensitive {
 		pattern = strings.ToLower(pattern)
 	}
-	res := fun(caseSensitive, forward, []rune(input), []rune(pattern))
-	if res.Start != sidx {
-		t.Errorf("Invalid start index: %d (expected: %d, %s / %s)", res.Start, sidx, input, pattern)
+	chars := util.ToChars([]byte(input))
+	res, pos := fun(caseSensitive, normalize, forward, &chars, []rune(pattern), true, nil)
+	var start, end int
+	if pos == nil || len(*pos) == 0 {
+		start = res.Start
+		end = res.End
+	} else {
+		sort.Ints(*pos)
+		start = (*pos)[0]
+		end = (*pos)[len(*pos)-1] + 1
 	}
-	if res.End != eidx {
-		t.Errorf("Invalid end index: %d (expected: %d, %s / %s)", res.End, eidx, input, pattern)
+	if start != sidx {
+		t.Errorf("Invalid start index: %d (expected: %d, %s / %s)", start, sidx, input, pattern)
 	}
-	if res.Bonus != bonus {
-		t.Errorf("Invalid bonus: %d (expected: %d, %s / %s)", res.Bonus, bonus, input, pattern)
+	if end != eidx {
+		t.Errorf("Invalid end index: %d (expected: %d, %s / %s)", end, eidx, input, pattern)
+	}
+	if res.Score != score {
+		t.Errorf("Invalid score: %d (expected: %d, %s / %s)", res.Score, score, input, pattern)
 	}
 }
 
 func TestFuzzyMatch(t *testing.T) {
-	assertMatch(t, FuzzyMatch, false, true, "fooBarbaz", "oBZ", 2, 9, 2)
-	assertMatch(t, FuzzyMatch, false, true, "foo bar baz", "fbb", 0, 9, 8)
-	assertMatch(t, FuzzyMatch, false, true, "/AutomatorDocument.icns", "rdoc", 9, 13, 4)
-	assertMatch(t, FuzzyMatch, false, true, "/man1/zshcompctl.1", "zshc", 6, 10, 7)
-	assertMatch(t, FuzzyMatch, false, true, "/.oh-my-zsh/cache", "zshc", 8, 13, 8)
-	assertMatch(t, FuzzyMatch, false, true, "ab0123 456", "12356", 3, 10, 3)
-	assertMatch(t, FuzzyMatch, false, true, "abc123 456", "12356", 3, 10, 5)
+	for _, fn := range []Algo{FuzzyMatchV1, FuzzyMatchV2} {
+		for _, forward := range []bool{true, false} {
+			assertMatch(t, fn, false, forward, "fooBarbaz1", "oBZ", 2, 9,
+				scoreMatch*3+bonusCamel123+scoreGapStart+scoreGapExtension*3)
+			assertMatch(t, fn, false, forward, "foo bar baz", "fbb", 0, 9,
+				scoreMatch*3+int(bonusBoundaryWhite)*bonusFirstCharMultiplier+
+					int(bonusBoundaryWhite)*2+2*scoreGapStart+4*scoreGapExtension)
+			assertMatch(t, fn, false, forward, "/AutomatorDocument.icns", "rdoc", 9, 13,
+				scoreMatch*4+bonusCamel123+bonusConsecutive*2)
+			assertMatch(t, fn, false, forward, "/man1/zshcompctl.1", "zshc", 6, 10,
+				scoreMatch*4+int(bonusBoundaryDelimiter)*bonusFirstCharMultiplier+int(bonusBoundaryDelimiter)*3)
+			assertMatch(t, fn, false, forward, "/.oh-my-zsh/cache", "zshc", 8, 13,
+				scoreMatch*4+bonusBoundary*bonusFirstCharMultiplier+bonusBoundary*2+scoreGapStart+int(bonusBoundaryDelimiter))
+			assertMatch(t, fn, false, forward, "ab0123 456", "12356", 3, 10,
+				scoreMatch*5+bonusConsecutive*3+scoreGapStart+scoreGapExtension)
+			assertMatch(t, fn, false, forward, "abc123 456", "12356", 3, 10,
+				scoreMatch*5+bonusCamel123*bonusFirstCharMultiplier+bonusCamel123*2+bonusConsecutive+scoreGapStart+scoreGapExtension)
+			assertMatch(t, fn, false, forward, "foo/bar/baz", "fbb", 0, 9,
+				scoreMatch*3+int(bonusBoundaryWhite)*bonusFirstCharMultiplier+
+					int(bonusBoundaryDelimiter)*2+2*scoreGapStart+4*scoreGapExtension)
+			assertMatch(t, fn, false, forward, "fooBarBaz", "fbb", 0, 7,
+				scoreMatch*3+int(bonusBoundaryWhite)*bonusFirstCharMultiplier+
+					bonusCamel123*2+2*scoreGapStart+2*scoreGapExtension)
+			assertMatch(t, fn, false, forward, "foo barbaz", "fbb", 0, 8,
+				scoreMatch*3+int(bonusBoundaryWhite)*bonusFirstCharMultiplier+int(bonusBoundaryWhite)+
+					scoreGapStart*2+scoreGapExtension*3)
+			assertMatch(t, fn, false, forward, "fooBar Baz", "foob", 0, 4,
+				scoreMatch*4+int(bonusBoundaryWhite)*bonusFirstCharMultiplier+int(bonusBoundaryWhite)*3)
+			assertMatch(t, fn, false, forward, "xFoo-Bar Baz", "foo-b", 1, 6,
+				scoreMatch*5+bonusCamel123*bonusFirstCharMultiplier+bonusCamel123*2+
+					bonusNonWord+bonusBoundary)
 
-	assertMatch(t, FuzzyMatch, false, true, "foo/bar/baz", "fbb", 0, 9, 8)
-	assertMatch(t, FuzzyMatch, false, true, "fooBarBaz", "fbb", 0, 7, 6)
-	assertMatch(t, FuzzyMatch, false, true, "foo barbaz", "fbb", 0, 8, 6)
-	assertMatch(t, FuzzyMatch, false, true, "fooBar Baz", "foob", 0, 4, 8)
-	assertMatch(t, FuzzyMatch, true, true, "fooBarbaz", "oBZ", -1, -1, 0)
-	assertMatch(t, FuzzyMatch, true, true, "fooBarbaz", "oBz", 2, 9, 2)
-	assertMatch(t, FuzzyMatch, true, true, "Foo Bar Baz", "fbb", -1, -1, 0)
-	assertMatch(t, FuzzyMatch, true, true, "Foo/Bar/Baz", "FBB", 0, 9, 8)
-	assertMatch(t, FuzzyMatch, true, true, "FooBarBaz", "FBB", 0, 7, 6)
-	assertMatch(t, FuzzyMatch, true, true, "foo BarBaz", "fBB", 0, 8, 7)
-	assertMatch(t, FuzzyMatch, true, true, "FooBar Baz", "FooB", 0, 4, 8)
-	assertMatch(t, FuzzyMatch, true, true, "fooBarbaz", "fooBarbazz", -1, -1, 0)
+			assertMatch(t, fn, true, forward, "fooBarbaz", "oBz", 2, 9,
+				scoreMatch*3+bonusCamel123+scoreGapStart+scoreGapExtension*3)
+			assertMatch(t, fn, true, forward, "Foo/Bar/Baz", "FBB", 0, 9,
+				scoreMatch*3+int(bonusBoundaryWhite)*bonusFirstCharMultiplier+int(bonusBoundaryDelimiter)*2+
+					scoreGapStart*2+scoreGapExtension*4)
+			assertMatch(t, fn, true, forward, "FooBarBaz", "FBB", 0, 7,
+				scoreMatch*3+int(bonusBoundaryWhite)*bonusFirstCharMultiplier+bonusCamel123*2+
+					scoreGapStart*2+scoreGapExtension*2)
+			assertMatch(t, fn, true, forward, "FooBar Baz", "FooB", 0, 4,
+				scoreMatch*4+int(bonusBoundaryWhite)*bonusFirstCharMultiplier+int(bonusBoundaryWhite)*2+
+					util.Max(bonusCamel123, int(bonusBoundaryWhite)))
+
+			// Consecutive bonus updated
+			assertMatch(t, fn, true, forward, "foo-bar", "o-ba", 2, 6,
+				scoreMatch*4+bonusBoundary*3)
+
+			// Non-match
+			assertMatch(t, fn, true, forward, "fooBarbaz", "oBZ", -1, -1, 0)
+			assertMatch(t, fn, true, forward, "Foo Bar Baz", "fbb", -1, -1, 0)
+			assertMatch(t, fn, true, forward, "fooBarbaz", "fooBarbazz", -1, -1, 0)
+		}
+	}
 }
 
 func TestFuzzyMatchBackward(t *testing.T) {
-	assertMatch(t, FuzzyMatch, false, true, "foobar fb", "fb", 0, 4, 4)
-	assertMatch(t, FuzzyMatch, false, false, "foobar fb", "fb", 7, 9, 5)
+	assertMatch(t, FuzzyMatchV1, false, true, "foobar fb", "fb", 0, 4,
+		scoreMatch*2+int(bonusBoundaryWhite)*bonusFirstCharMultiplier+
+			scoreGapStart+scoreGapExtension)
+	assertMatch(t, FuzzyMatchV1, false, false, "foobar fb", "fb", 7, 9,
+		scoreMatch*2+int(bonusBoundaryWhite)*bonusFirstCharMultiplier+int(bonusBoundaryWhite))
 }
 
 func TestExactMatchNaive(t *testing.T) {
 	for _, dir := range []bool{true, false} {
-		assertMatch(t, ExactMatchNaive, false, dir, "fooBarbaz", "oBA", 2, 5, 3)
 		assertMatch(t, ExactMatchNaive, true, dir, "fooBarbaz", "oBA", -1, -1, 0)
 		assertMatch(t, ExactMatchNaive, true, dir, "fooBarbaz", "fooBarbazz", -1, -1, 0)
 
-		assertMatch(t, ExactMatchNaive, false, dir, "/AutomatorDocument.icns", "rdoc", 9, 13, 4)
-		assertMatch(t, ExactMatchNaive, false, dir, "/man1/zshcompctl.1", "zshc", 6, 10, 7)
-		assertMatch(t, ExactMatchNaive, false, dir, "/.oh-my-zsh/cache", "zsh/c", 8, 13, 10)
+		assertMatch(t, ExactMatchNaive, false, dir, "fooBarbaz", "oBA", 2, 5,
+			scoreMatch*3+bonusCamel123+bonusConsecutive)
+		assertMatch(t, ExactMatchNaive, false, dir, "/AutomatorDocument.icns", "rdoc", 9, 13,
+			scoreMatch*4+bonusCamel123+bonusConsecutive*2)
+		assertMatch(t, ExactMatchNaive, false, dir, "/man1/zshcompctl.1", "zshc", 6, 10,
+			scoreMatch*4+int(bonusBoundaryDelimiter)*(bonusFirstCharMultiplier+3))
+		assertMatch(t, ExactMatchNaive, false, dir, "/.oh-my-zsh/cache", "zsh/c", 8, 13,
+			scoreMatch*5+bonusBoundary*(bonusFirstCharMultiplier+3)+int(bonusBoundaryDelimiter))
 	}
 }
 
 func TestExactMatchNaiveBackward(t *testing.T) {
-	assertMatch(t, ExactMatchNaive, false, true, "foobar foob", "oo", 1, 3, 1)
-	assertMatch(t, ExactMatchNaive, false, false, "foobar foob", "oo", 8, 10, 1)
+	assertMatch(t, ExactMatchNaive, false, true, "foobar foob", "oo", 1, 3,
+		scoreMatch*2+bonusConsecutive)
+	assertMatch(t, ExactMatchNaive, false, false, "foobar foob", "oo", 8, 10,
+		scoreMatch*2+bonusConsecutive)
 }
 
 func TestPrefixMatch(t *testing.T) {
+	score := scoreMatch*3 + int(bonusBoundaryWhite)*bonusFirstCharMultiplier + int(bonusBoundaryWhite)*2
+
 	for _, dir := range []bool{true, false} {
 		assertMatch(t, PrefixMatch, true, dir, "fooBarbaz", "Foo", -1, -1, 0)
 		assertMatch(t, PrefixMatch, false, dir, "fooBarBaz", "baz", -1, -1, 0)
-		assertMatch(t, PrefixMatch, false, dir, "fooBarbaz", "Foo", 0, 3, 6)
-		assertMatch(t, PrefixMatch, false, dir, "foOBarBaZ", "foo", 0, 3, 7)
-		assertMatch(t, PrefixMatch, false, dir, "f-oBarbaz", "f-o", 0, 3, 8)
+		assertMatch(t, PrefixMatch, false, dir, "fooBarbaz", "Foo", 0, 3, score)
+		assertMatch(t, PrefixMatch, false, dir, "foOBarBaZ", "foo", 0, 3, score)
+		assertMatch(t, PrefixMatch, false, dir, "f-oBarbaz", "f-o", 0, 3, score)
+
+		assertMatch(t, PrefixMatch, false, dir, " fooBar", "foo", 1, 4, score)
+		assertMatch(t, PrefixMatch, false, dir, " fooBar", " fo", 0, 3, score)
+		assertMatch(t, PrefixMatch, false, dir, "     fo", "foo", -1, -1, 0)
 	}
 }
 
 func TestSuffixMatch(t *testing.T) {
 	for _, dir := range []bool{true, false} {
-		assertMatch(t, SuffixMatch, false, dir, "fooBarbaz", "Foo", -1, -1, 0)
-		assertMatch(t, SuffixMatch, false, dir, "fooBarbaz", "baz", 6, 9, 2)
-		assertMatch(t, SuffixMatch, false, dir, "fooBarBaZ", "baz", 6, 9, 5)
 		assertMatch(t, SuffixMatch, true, dir, "fooBarbaz", "Baz", -1, -1, 0)
+		assertMatch(t, SuffixMatch, false, dir, "fooBarbaz", "Foo", -1, -1, 0)
+
+		assertMatch(t, SuffixMatch, false, dir, "fooBarbaz", "baz", 6, 9,
+			scoreMatch*3+bonusConsecutive*2)
+		assertMatch(t, SuffixMatch, false, dir, "fooBarBaZ", "baz", 6, 9,
+			(scoreMatch+bonusCamel123)*3+bonusCamel123*(bonusFirstCharMultiplier-1))
+
+		// Strip trailing white space from the string
+		assertMatch(t, SuffixMatch, false, dir, "fooBarbaz ", "baz", 6, 9,
+			scoreMatch*3+bonusConsecutive*2)
+
+		// Only when the pattern doesn't end with a space
+		assertMatch(t, SuffixMatch, false, dir, "fooBarbaz ", "baz ", 6, 10,
+			scoreMatch*4+bonusConsecutive*2+int(bonusBoundaryWhite))
 	}
 }
 
 func TestEmptyPattern(t *testing.T) {
 	for _, dir := range []bool{true, false} {
-		assertMatch(t, FuzzyMatch, true, dir, "foobar", "", 0, 0, 0)
+		assertMatch(t, FuzzyMatchV1, true, dir, "foobar", "", 0, 0, 0)
+		assertMatch(t, FuzzyMatchV2, true, dir, "foobar", "", 0, 0, 0)
 		assertMatch(t, ExactMatchNaive, true, dir, "foobar", "", 0, 0, 0)
 		assertMatch(t, PrefixMatch, true, dir, "foobar", "", 0, 0, 0)
 		assertMatch(t, SuffixMatch, true, dir, "foobar", "", 6, 6, 0)
 	}
 }
+
+func TestNormalize(t *testing.T) {
+	caseSensitive := false
+	normalize := true
+	forward := true
+	test := func(input, pattern string, sidx, eidx, score int, funs ...Algo) {
+		for _, fun := range funs {
+			assertMatch2(t, fun, caseSensitive, normalize, forward,
+				input, pattern, sidx, eidx, score)
+		}
+	}
+	test("Só Danço Samba", "So", 0, 2, 62, FuzzyMatchV1, FuzzyMatchV2, PrefixMatch, ExactMatchNaive)
+	test("Só Danço Samba", "sodc", 0, 7, 97, FuzzyMatchV1, FuzzyMatchV2)
+	test("Danço", "danco", 0, 5, 140, FuzzyMatchV1, FuzzyMatchV2, PrefixMatch, SuffixMatch, ExactMatchNaive, EqualMatch)
+}
+
+func TestLongString(t *testing.T) {
+	bytes := make([]byte, math.MaxUint16*2)
+	for i := range bytes {
+		bytes[i] = 'x'
+	}
+	bytes[math.MaxUint16] = 'z'
+	assertMatch(t, FuzzyMatchV2, true, true, string(bytes), "zx", math.MaxUint16, math.MaxUint16+2, scoreMatch*2+bonusConsecutive)
+}

src/algo/normalize.go

@@ -0,0 +1,492 @@
+// Normalization of latin script letters
+// Reference: http://www.unicode.org/Public/UCD/latest/ucd/Index.txt
+
+package algo
+
+var normalized map[rune]rune = map[rune]rune{
+	0x00E1: 'a', //  WITH ACUTE, LATIN SMALL LETTER
+	0x0103: 'a', //  WITH BREVE, LATIN SMALL LETTER
+	0x01CE: 'a', //  WITH CARON, LATIN SMALL LETTER
+	0x00E2: 'a', //  WITH CIRCUMFLEX, LATIN SMALL LETTER
+	0x00E4: 'a', //  WITH DIAERESIS, LATIN SMALL LETTER
+	0x0227: 'a', //  WITH DOT ABOVE, LATIN SMALL LETTER
+	0x1EA1: 'a', //  WITH DOT BELOW, LATIN SMALL LETTER
+	0x0201: 'a', //  WITH DOUBLE GRAVE, LATIN SMALL LETTER
+	0x00E0: 'a', //  WITH GRAVE, LATIN SMALL LETTER
+	0x1EA3: 'a', //  WITH HOOK ABOVE, LATIN SMALL LETTER
+	0x0203: 'a', //  WITH INVERTED BREVE, LATIN SMALL LETTER
+	0x0101: 'a', //  WITH MACRON, LATIN SMALL LETTER
+	0x0105: 'a', //  WITH OGONEK, LATIN SMALL LETTER
+	0x1E9A: 'a', //  WITH RIGHT HALF RING, LATIN SMALL LETTER
+	0x00E5: 'a', //  WITH RING ABOVE, LATIN SMALL LETTER
+	0x1E01: 'a', //  WITH RING BELOW, LATIN SMALL LETTER
+	0x00E3: 'a', //  WITH TILDE, LATIN SMALL LETTER
+	0x0363: 'a', // , COMBINING LATIN SMALL LETTER
+	0x0250: 'a', // , LATIN SMALL LETTER TURNED
+	0x1E03: 'b', //  WITH DOT ABOVE, LATIN SMALL LETTER
+	0x1E05: 'b', //  WITH DOT BELOW, LATIN SMALL LETTER
+	0x0253: 'b', //  WITH HOOK, LATIN SMALL LETTER
+	0x1E07: 'b', //  WITH LINE BELOW, LATIN SMALL LETTER
+	0x0180: 'b', //  WITH STROKE, LATIN SMALL LETTER
+	0x0183: 'b', //  WITH TOPBAR, LATIN SMALL LETTER
+	0x0107: 'c', //  WITH ACUTE, LATIN SMALL LETTER
+	0x010D: 'c', //  WITH CARON, LATIN SMALL LETTER
+	0x00E7: 'c', //  WITH CEDILLA, LATIN SMALL LETTER
+	0x0109: 'c', //  WITH CIRCUMFLEX, LATIN SMALL LETTER
+	0x0255: 'c', //  WITH CURL, LATIN SMALL LETTER
+	0x010B: 'c', //  WITH DOT ABOVE, LATIN SMALL LETTER
+	0x0188: 'c', //  WITH HOOK, LATIN SMALL LETTER
+	0x023C: 'c', //  WITH STROKE, LATIN SMALL LETTER
+	0x0368: 'c', // , COMBINING LATIN SMALL LETTER
+	0x0297: 'c', // , LATIN LETTER STRETCHED
+	0x2184: 'c', // , LATIN SMALL LETTER REVERSED
+	0x010F: 'd', //  WITH CARON, LATIN SMALL LETTER
+	0x1E11: 'd', //  WITH CEDILLA, LATIN SMALL LETTER
+	0x1E13: 'd', //  WITH CIRCUMFLEX BELOW, LATIN SMALL LETTER
+	0x0221: 'd', //  WITH CURL, LATIN SMALL LETTER
+	0x1E0B: 'd', //  WITH DOT ABOVE, LATIN SMALL LETTER
+	0x1E0D: 'd', //  WITH DOT BELOW, LATIN SMALL LETTER
+	0x0257: 'd', //  WITH HOOK, LATIN SMALL LETTER
+	0x1E0F: 'd', //  WITH LINE BELOW, LATIN SMALL LETTER
+	0x0111: 'd', //  WITH STROKE, LATIN SMALL LETTER
+	0x0256: 'd', //  WITH TAIL, LATIN SMALL LETTER
+	0x018C: 'd', //  WITH TOPBAR, LATIN SMALL LETTER
+	0x0369: 'd', // , COMBINING LATIN SMALL LETTER
+	0x00E9: 'e', //  WITH ACUTE, LATIN SMALL LETTER
+	0x0115: 'e', //  WITH BREVE, LATIN SMALL LETTER
+	0x011B: 'e', //  WITH CARON, LATIN SMALL LETTER
+	0x0229: 'e', //  WITH CEDILLA, LATIN SMALL LETTER
+	0x1E19: 'e', //  WITH CIRCUMFLEX BELOW, LATIN SMALL LETTER
+	0x00EA: 'e', //  WITH CIRCUMFLEX, LATIN SMALL LETTER
+	0x00EB: 'e', //  WITH DIAERESIS, LATIN SMALL LETTER
+	0x0117: 'e', //  WITH DOT ABOVE, LATIN SMALL LETTER
+	0x1EB9: 'e', //  WITH DOT BELOW, LATIN SMALL LETTER
+	0x0205: 'e', //  WITH DOUBLE GRAVE, LATIN SMALL LETTER
+	0x00E8: 'e', //  WITH GRAVE, LATIN SMALL LETTER
+	0x1EBB: 'e', //  WITH HOOK ABOVE, LATIN SMALL LETTER
+	0x025D: 'e', //  WITH HOOK, LATIN SMALL LETTER REVERSED OPEN
+	0x0207: 'e', //  WITH INVERTED BREVE, LATIN SMALL LETTER
+	0x0113: 'e', //  WITH MACRON, LATIN SMALL LETTER
+	0x0119: 'e', //  WITH OGONEK, LATIN SMALL LETTER
+	0x0247: 'e', //  WITH STROKE, LATIN SMALL LETTER
+	0x1E1B: 'e', //  WITH TILDE BELOW, LATIN SMALL LETTER
+	0x1EBD: 'e', //  WITH TILDE, LATIN SMALL LETTER
+	0x0364: 'e', // , COMBINING LATIN SMALL LETTER
+	0x029A: 'e', // , LATIN SMALL LETTER CLOSED OPEN
+	0x025E: 'e', // , LATIN SMALL LETTER CLOSED REVERSED OPEN
+	0x025B: 'e', // , LATIN SMALL LETTER OPEN
+	0x0258: 'e', // , LATIN SMALL LETTER REVERSED
+	0x025C: 'e', // , LATIN SMALL LETTER REVERSED OPEN
+	0x01DD: 'e', // , LATIN SMALL LETTER TURNED
+	0x1D08: 'e', // , LATIN SMALL LETTER TURNED OPEN
+	0x1E1F: 'f', //  WITH DOT ABOVE, LATIN SMALL LETTER
+	0x0192: 'f', //  WITH HOOK, LATIN SMALL LETTER
+	0x01F5: 'g', //  WITH ACUTE, LATIN SMALL LETTER
+	0x011F: 'g', //  WITH BREVE, LATIN SMALL LETTER
+	0x01E7: 'g', //  WITH CARON, LATIN SMALL LETTER
+	0x0123: 'g', //  WITH CEDILLA, LATIN SMALL LETTER
+	0x011D: 'g', //  WITH CIRCUMFLEX, LATIN SMALL LETTER
+	0x0121: 'g', //  WITH DOT ABOVE, LATIN SMALL LETTER
+	0x0260: 'g', //  WITH HOOK, LATIN SMALL LETTER
+	0x1E21: 'g', //  WITH MACRON, LATIN SMALL LETTER
+	0x01E5: 'g', //  WITH STROKE, LATIN SMALL LETTER
+	0x0261: 'g', // , LATIN SMALL LETTER SCRIPT
+	0x1E2B: 'h', //  WITH BREVE BELOW, LATIN SMALL LETTER
+	0x021F: 'h', //  WITH CARON, LATIN SMALL LETTER
+	0x1E29: 'h', //  WITH CEDILLA, LATIN SMALL LETTER
+	0x0125: 'h', //  WITH CIRCUMFLEX, LATIN SMALL LETTER
+	0x1E27: 'h', //  WITH DIAERESIS, LATIN SMALL LETTER
+	0x1E23: 'h', //  WITH DOT ABOVE, LATIN SMALL LETTER
+	0x1E25: 'h', //  WITH DOT BELOW, LATIN SMALL LETTER
+	0x02AE: 'h', //  WITH FISHHOOK, LATIN SMALL LETTER TURNED
+	0x0266: 'h', //  WITH HOOK, LATIN SMALL LETTER
+	0x1E96: 'h', //  WITH LINE BELOW, LATIN SMALL LETTER
+	0x0127: 'h', //  WITH STROKE, LATIN SMALL LETTER
+	0x036A: 'h', // , COMBINING LATIN SMALL LETTER
+	0x0265: 'h', // , LATIN SMALL LETTER TURNED
+	0x2095: 'h', // , LATIN SUBSCRIPT SMALL LETTER
+	0x00ED: 'i', //  WITH ACUTE, LATIN SMALL LETTER
+	0x012D: 'i', //  WITH BREVE, LATIN SMALL LETTER
+	0x01D0: 'i', //  WITH CARON, LATIN SMALL LETTER
+	0x00EE: 'i', //  WITH CIRCUMFLEX, LATIN SMALL LETTER
+	0x00EF: 'i', //  WITH DIAERESIS, LATIN SMALL LETTER
+	0x1ECB: 'i', //  WITH DOT BELOW, LATIN SMALL LETTER
+	0x0209: 'i', //  WITH DOUBLE GRAVE, LATIN SMALL LETTER
+	0x00EC: 'i', //  WITH GRAVE, LATIN SMALL LETTER
+	0x1EC9: 'i', //  WITH HOOK ABOVE, LATIN SMALL LETTER
+	0x020B: 'i', //  WITH INVERTED BREVE, LATIN SMALL LETTER
+	0x012B: 'i', //  WITH MACRON, LATIN SMALL LETTER
+	0x012F: 'i', //  WITH OGONEK, LATIN SMALL LETTER
+	0x0268: 'i', //  WITH STROKE, LATIN SMALL LETTER
+	0x1E2D: 'i', //  WITH TILDE BELOW, LATIN SMALL LETTER
+	0x0129: 'i', //  WITH TILDE, LATIN SMALL LETTER
+	0x0365: 'i', // , COMBINING LATIN SMALL LETTER
+	0x0131: 'i', // , LATIN SMALL LETTER DOTLESS
+	0x1D09: 'i', // , LATIN SMALL LETTER TURNED
+	0x1D62: 'i', // , LATIN SUBSCRIPT SMALL LETTER
+	0x2071: 'i', // , SUPERSCRIPT LATIN SMALL LETTER
+	0x01F0: 'j', //  WITH CARON, LATIN SMALL LETTER
+	0x0135: 'j', //  WITH CIRCUMFLEX, LATIN SMALL LETTER
+	0x029D: 'j', //  WITH CROSSED-TAIL, LATIN SMALL LETTER
+	0x0249: 'j', //  WITH STROKE, LATIN SMALL LETTER
+	0x025F: 'j', //  WITH STROKE, LATIN SMALL LETTER DOTLESS
+	0x0237: 'j', // , LATIN SMALL LETTER DOTLESS
+	0x1E31: 'k', //  WITH ACUTE, LATIN SMALL LETTER
+	0x01E9: 'k', //  WITH CARON, LATIN SMALL LETTER
+	0x0137: 'k', //  WITH CEDILLA, LATIN SMALL LETTER
+	0x1E33: 'k', //  WITH DOT BELOW, LATIN SMALL LETTER
+	0x0199: 'k', //  WITH HOOK, LATIN SMALL LETTER
+	0x1E35: 'k', //  WITH LINE BELOW, LATIN SMALL LETTER
+	0x029E: 'k', // , LATIN SMALL LETTER TURNED
+	0x2096: 'k', // , LATIN SUBSCRIPT SMALL LETTER
+	0x013A: 'l', //  WITH ACUTE, LATIN SMALL LETTER
+	0x019A: 'l', //  WITH BAR, LATIN SMALL LETTER
+	0x026C: 'l', //  WITH BELT, LATIN SMALL LETTER
+	0x013E: 'l', //  WITH CARON, LATIN SMALL LETTER
+	0x013C: 'l', //  WITH CEDILLA, LATIN SMALL LETTER
+	0x1E3D: 'l', //  WITH CIRCUMFLEX BELOW, LATIN SMALL LETTER
+	0x0234: 'l', //  WITH CURL, LATIN SMALL LETTER
+	0x1E37: 'l', //  WITH DOT BELOW, LATIN SMALL LETTER
+	0x1E3B: 'l', //  WITH LINE BELOW, LATIN SMALL LETTER
+	0x0140: 'l', //  WITH MIDDLE DOT, LATIN SMALL LETTER
+	0x026B: 'l', //  WITH MIDDLE TILDE, LATIN SMALL LETTER
+	0x026D: 'l', //  WITH RETROFLEX HOOK, LATIN SMALL LETTER
+	0x0142: 'l', //  WITH STROKE, LATIN SMALL LETTER
+	0x2097: 'l', // , LATIN SUBSCRIPT SMALL LETTER
+	0x1E3F: 'm', //  WITH ACUTE, LATIN SMALL LETTER
+	0x1E41: 'm', //  WITH DOT ABOVE, LATIN SMALL LETTER
+	0x1E43: 'm', //  WITH DOT BELOW, LATIN SMALL LETTER
+	0x0271: 'm', //  WITH HOOK, LATIN SMALL LETTER
+	0x0270: 'm', //  WITH LONG LEG, LATIN SMALL LETTER TURNED
+	0x036B: 'm', // , COMBINING LATIN SMALL LETTER
+	0x1D1F: 'm', // , LATIN SMALL LETTER SIDEWAYS TURNED
+	0x026F: 'm', // , LATIN SMALL LETTER TURNED
+	0x2098: 'm', // , LATIN SUBSCRIPT SMALL LETTER
+	0x0144: 'n', //  WITH ACUTE, LATIN SMALL LETTER
+	0x0148: 'n', //  WITH CARON, LATIN SMALL LETTER
+	0x0146: 'n', //  WITH CEDILLA, LATIN SMALL LETTER
+	0x1E4B: 'n', //  WITH CIRCUMFLEX BELOW, LATIN SMALL LETTER
+	0x0235: 'n', //  WITH CURL, LATIN SMALL LETTER
+	0x1E45: 'n', //  WITH DOT ABOVE, LATIN SMALL LETTER
+	0x1E47: 'n', //  WITH DOT BELOW, LATIN SMALL LETTER
+	0x01F9: 'n', //  WITH GRAVE, LATIN SMALL LETTER
+	0x0272: 'n', //  WITH LEFT HOOK, LATIN SMALL LETTER
+	0x1E49: 'n', //  WITH LINE BELOW, LATIN SMALL LETTER
+	0x019E: 'n', //  WITH LONG RIGHT LEG, LATIN SMALL LETTER
+	0x0273: 'n', //  WITH RETROFLEX HOOK, LATIN SMALL LETTER
+	0x00F1: 'n', //  WITH TILDE, LATIN SMALL LETTER
+	0x2099: 'n', // , LATIN SUBSCRIPT SMALL LETTER
+	0x00F3: 'o', //  WITH ACUTE, LATIN SMALL LETTER
+	0x014F: 'o', //  WITH BREVE, LATIN SMALL LETTER
+	0x01D2: 'o', //  WITH CARON, LATIN SMALL LETTER
+	0x00F4: 'o', //  WITH CIRCUMFLEX, LATIN SMALL LETTER
+	0x00F6: 'o', //  WITH DIAERESIS, LATIN SMALL LETTER
+	0x022F: 'o', //  WITH DOT ABOVE, LATIN SMALL LETTER
+	0x1ECD: 'o', //  WITH DOT BELOW, LATIN SMALL LETTER
+	0x0151: 'o', //  WITH DOUBLE ACUTE, LATIN SMALL LETTER
+	0x020D: 'o', //  WITH DOUBLE GRAVE, LATIN SMALL LETTER
+	0x00F2: 'o', //  WITH GRAVE, LATIN SMALL LETTER
+	0x1ECF: 'o', //  WITH HOOK ABOVE, LATIN SMALL LETTER
+	0x01A1: 'o', //  WITH HORN, LATIN SMALL LETTER
+	0x020F: 'o', //  WITH INVERTED BREVE, LATIN SMALL LETTER
+	0x014D: 'o', //  WITH MACRON, LATIN SMALL LETTER
+	0x01EB: 'o', //  WITH OGONEK, LATIN SMALL LETTER
+	0x00F8: 'o', //  WITH STROKE, LATIN SMALL LETTER
+	0x1D13: 'o', //  WITH STROKE, LATIN SMALL LETTER SIDEWAYS
+	0x00F5: 'o', //  WITH TILDE, LATIN SMALL LETTER
+	0x0366: 'o', // , COMBINING LATIN SMALL LETTER
+	0x0275: 'o', // , LATIN SMALL LETTER BARRED
+	0x1D17: 'o', // , LATIN SMALL LETTER BOTTOM HALF
+	0x0254: 'o', // , LATIN SMALL LETTER OPEN
+	0x1D11: 'o', // , LATIN SMALL LETTER SIDEWAYS
+	0x1D12: 'o', // , LATIN SMALL LETTER SIDEWAYS OPEN
+	0x1D16: 'o', // , LATIN SMALL LETTER TOP HALF
+	0x1E55: 'p', //  WITH ACUTE, LATIN SMALL LETTER
+	0x1E57: 'p', //  WITH DOT ABOVE, LATIN SMALL LETTER
+	0x01A5: 'p', //  WITH HOOK, LATIN SMALL LETTER
+	0x209A: 'p', // , LATIN SUBSCRIPT SMALL LETTER
+	0x024B: 'q', //  WITH HOOK TAIL, LATIN SMALL LETTER
+	0x02A0: 'q', //  WITH HOOK, LATIN SMALL LETTER
+	0x0155: 'r', //  WITH ACUTE, LATIN SMALL LETTER
+	0x0159: 'r', //  WITH CARON, LATIN SMALL LETTER
+	0x0157: 'r', //  WITH CEDILLA, LATIN SMALL LETTER
+	0x1E59: 'r', //  WITH DOT ABOVE, LATIN SMALL LETTER
+	0x1E5B: 'r', //  WITH DOT BELOW, LATIN SMALL LETTER
+	0x0211: 'r', //  WITH DOUBLE GRAVE, LATIN SMALL LETTER
+	0x027E: 'r', //  WITH FISHHOOK, LATIN SMALL LETTER
+	0x027F: 'r', //  WITH FISHHOOK, LATIN SMALL LETTER REVERSED
+	0x027B: 'r', //  WITH HOOK, LATIN SMALL LETTER TURNED
+	0x0213: 'r', //  WITH INVERTED BREVE, LATIN SMALL LETTER
+	0x1E5F: 'r', //  WITH LINE BELOW, LATIN SMALL LETTER
+	0x027C: 'r', //  WITH LONG LEG, LATIN SMALL LETTER
+	0x027A: 'r', //  WITH LONG LEG, LATIN SMALL LETTER TURNED
+	0x024D: 'r', //  WITH STROKE, LATIN SMALL LETTER
+	0x027D: 'r', //  WITH TAIL, LATIN SMALL LETTER
+	0x036C: 'r', // , COMBINING LATIN SMALL LETTER
+	0x0279: 'r', // , LATIN SMALL LETTER TURNED
+	0x1D63: 'r', // , LATIN SUBSCRIPT SMALL LETTER
+	0x015B: 's', //  WITH ACUTE, LATIN SMALL LETTER
+	0x0161: 's', //  WITH CARON, LATIN SMALL LETTER
+	0x015F: 's', //  WITH CEDILLA, LATIN SMALL LETTER
+	0x015D: 's', //  WITH CIRCUMFLEX, LATIN SMALL LETTER
+	0x0219: 's', //  WITH COMMA BELOW, LATIN SMALL LETTER
+	0x1E61: 's', //  WITH DOT ABOVE, LATIN SMALL LETTER
+	0x1E9B: 's', //  WITH DOT ABOVE, LATIN SMALL LETTER LONG
+	0x1E63: 's', //  WITH DOT BELOW, LATIN SMALL LETTER
+	0x0282: 's', //  WITH HOOK, LATIN SMALL LETTER
+	0x023F: 's', //  WITH SWASH TAIL, LATIN SMALL LETTER
+	0x017F: 's', // , LATIN SMALL LETTER LONG
+	0x00DF: 's', // , LATIN SMALL LETTER SHARP
+	0x209B: 's', // , LATIN SUBSCRIPT SMALL LETTER
+	0x0165: 't', //  WITH CARON, LATIN SMALL LETTER
+	0x0163: 't', //  WITH CEDILLA, LATIN SMALL LETTER
+	0x1E71: 't', //  WITH CIRCUMFLEX BELOW, LATIN SMALL LETTER
+	0x021B: 't', //  WITH COMMA BELOW, LATIN SMALL LETTER
+	0x0236: 't', //  WITH CURL, LATIN SMALL LETTER
+	0x1E97: 't', //  WITH DIAERESIS, LATIN SMALL LETTER
+	0x1E6B: 't', //  WITH DOT ABOVE, LATIN SMALL LETTER
+	0x1E6D: 't', //  WITH DOT BELOW, LATIN SMALL LETTER
+	0x01AD: 't', //  WITH HOOK, LATIN SMALL LETTER
+	0x1E6F: 't', //  WITH LINE BELOW, LATIN SMALL LETTER
+	0x01AB: 't', //  WITH PALATAL HOOK, LATIN SMALL LETTER
+	0x0288: 't', //  WITH RETROFLEX HOOK, LATIN SMALL LETTER
+	0x0167: 't', //  WITH STROKE, LATIN SMALL LETTER
+	0x036D: 't', // , COMBINING LATIN SMALL LETTER
+	0x0287: 't', // , LATIN SMALL LETTER TURNED
+	0x209C: 't', // , LATIN SUBSCRIPT SMALL LETTER
+	0x0289: 'u', //  BAR, LATIN SMALL LETTER
+	0x00FA: 'u', //  WITH ACUTE, LATIN SMALL LETTER
+	0x016D: 'u', //  WITH BREVE, LATIN SMALL LETTER
+	0x01D4: 'u', //  WITH CARON, LATIN SMALL LETTER
+	0x1E77: 'u', //  WITH CIRCUMFLEX BELOW, LATIN SMALL LETTER
+	0x00FB: 'u', //  WITH CIRCUMFLEX, LATIN SMALL LETTER
+	0x1E73: 'u', //  WITH DIAERESIS BELOW, LATIN SMALL LETTER
+	0x00FC: 'u', //  WITH DIAERESIS, LATIN SMALL LETTER
+	0x1EE5: 'u', //  WITH DOT BELOW, LATIN SMALL LETTER
+	0x0171: 'u', //  WITH DOUBLE ACUTE, LATIN SMALL LETTER
+	0x0215: 'u', //  WITH DOUBLE GRAVE, LATIN SMALL LETTER
+	0x00F9: 'u', //  WITH GRAVE, LATIN SMALL LETTER
+	0x1EE7: 'u', //  WITH HOOK ABOVE, LATIN SMALL LETTER
+	0x01B0: 'u', //  WITH HORN, LATIN SMALL LETTER
+	0x0217: 'u', //  WITH INVERTED BREVE, LATIN SMALL LETTER
+	0x016B: 'u', //  WITH MACRON, LATIN SMALL LETTER
+	0x0173: 'u', //  WITH OGONEK, LATIN SMALL LETTER
+	0x016F: 'u', //  WITH RING ABOVE, LATIN SMALL LETTER
+	0x1E75: 'u', //  WITH TILDE BELOW, LATIN SMALL LETTER
+	0x0169: 'u', //  WITH TILDE, LATIN SMALL LETTER
+	0x0367: 'u', // , COMBINING LATIN SMALL LETTER
+	0x1D1D: 'u', // , LATIN SMALL LETTER SIDEWAYS
+	0x1D1E: 'u', // , LATIN SMALL LETTER SIDEWAYS DIAERESIZED
+	0x1D64: 'u', // , LATIN SUBSCRIPT SMALL LETTER
+	0x1E7F: 'v', //  WITH DOT BELOW, LATIN SMALL LETTER
+	0x028B: 'v', //  WITH HOOK, LATIN SMALL LETTER
+	0x1E7D: 'v', //  WITH TILDE, LATIN SMALL LETTER
+	0x036E: 'v', // , COMBINING LATIN SMALL LETTER
+	0x028C: 'v', // , LATIN SMALL LETTER TURNED
+	0x1D65: 'v', // , LATIN SUBSCRIPT SMALL LETTER
+	0x1E83: 'w', //  WITH ACUTE, LATIN SMALL LETTER
+	0x0175: 'w', //  WITH CIRCUMFLEX, LATIN SMALL LETTER
+	0x1E85: 'w', //  WITH DIAERESIS, LATIN SMALL LETTER
+	0x1E87: 'w', //  WITH DOT ABOVE, LATIN SMALL LETTER
+	0x1E89: 'w', //  WITH DOT BELOW, LATIN SMALL LETTER
+	0x1E81: 'w', //  WITH GRAVE, LATIN SMALL LETTER
+	0x1E98: 'w', //  WITH RING ABOVE, LATIN SMALL LETTER
+	0x028D: 'w', // , LATIN SMALL LETTER TURNED
+	0x1E8D: 'x', //  WITH DIAERESIS, LATIN SMALL LETTER
+	0x1E8B: 'x', //  WITH DOT ABOVE, LATIN SMALL LETTER
+	0x036F: 'x', // , COMBINING LATIN SMALL LETTER
+	0x00FD: 'y', //  WITH ACUTE, LATIN SMALL LETTER
+	0x0177: 'y', //  WITH CIRCUMFLEX, LATIN SMALL LETTER
+	0x00FF: 'y', //  WITH DIAERESIS, LATIN SMALL LETTER
+	0x1E8F: 'y', //  WITH DOT ABOVE, LATIN SMALL LETTER
+	0x1EF5: 'y', //  WITH DOT BELOW, LATIN SMALL LETTER
+	0x1EF3: 'y', //  WITH GRAVE, LATIN SMALL LETTER
+	0x1EF7: 'y', //  WITH HOOK ABOVE, LATIN SMALL LETTER
+	0x01B4: 'y', //  WITH HOOK, LATIN SMALL LETTER
+	0x0233: 'y', //  WITH MACRON, LATIN SMALL LETTER
+	0x1E99: 'y', //  WITH RING ABOVE, LATIN SMALL LETTER
+	0x024F: 'y', //  WITH STROKE, LATIN SMALL LETTER
+	0x1EF9: 'y', //  WITH TILDE, LATIN SMALL LETTER
+	0x028E: 'y', // , LATIN SMALL LETTER TURNED
+	0x017A: 'z', //  WITH ACUTE, LATIN SMALL LETTER
+	0x017E: 'z', //  WITH CARON, LATIN SMALL LETTER
+	0x1E91: 'z', //  WITH CIRCUMFLEX, LATIN SMALL LETTER
+	0x0291: 'z', //  WITH CURL, LATIN SMALL LETTER
+	0x017C: 'z', //  WITH DOT ABOVE, LATIN SMALL LETTER
+	0x1E93: 'z', //  WITH DOT BELOW, LATIN SMALL LETTER
+	0x0225: 'z', //  WITH HOOK, LATIN SMALL LETTER
+	0x1E95: 'z', //  WITH LINE BELOW, LATIN SMALL LETTER
+	0x0290: 'z', //  WITH RETROFLEX HOOK, LATIN SMALL LETTER
+	0x01B6: 'z', //  WITH STROKE, LATIN SMALL LETTER
+	0x0240: 'z', //  WITH SWASH TAIL, LATIN SMALL LETTER
+	0x0251: 'a', // , latin small letter script
+	0x00C1: 'A', //  WITH ACUTE, LATIN CAPITAL LETTER
+	0x00C2: 'A', //  WITH CIRCUMFLEX, LATIN CAPITAL LETTER
+	0x00C4: 'A', //  WITH DIAERESIS, LATIN CAPITAL LETTER
+	0x00C0: 'A', //  WITH GRAVE, LATIN CAPITAL LETTER
+	0x00C5: 'A', //  WITH RING ABOVE, LATIN CAPITAL LETTER
+	0x023A: 'A', //  WITH STROKE, LATIN CAPITAL LETTER
+	0x00C3: 'A', //  WITH TILDE, LATIN CAPITAL LETTER
+	0x1D00: 'A', // , LATIN LETTER SMALL CAPITAL
+	0x0181: 'B', //  WITH HOOK, LATIN CAPITAL LETTER
+	0x0243: 'B', //  WITH STROKE, LATIN CAPITAL LETTER
+	0x0299: 'B', // , LATIN LETTER SMALL CAPITAL
+	0x1D03: 'B', // , LATIN LETTER SMALL CAPITAL BARRED
+	0x00C7: 'C', //  WITH CEDILLA, LATIN CAPITAL LETTER
+	0x023B: 'C', //  WITH STROKE, LATIN CAPITAL LETTER
+	0x1D04: 'C', // , LATIN LETTER SMALL CAPITAL
+	0x018A: 'D', //  WITH HOOK, LATIN CAPITAL LETTER
+	0x0189: 'D', // , LATIN CAPITAL LETTER AFRICAN
+	0x1D05: 'D', // , LATIN LETTER SMALL CAPITAL
+	0x00C9: 'E', //  WITH ACUTE, LATIN CAPITAL LETTER
+	0x00CA: 'E', //  WITH CIRCUMFLEX, LATIN CAPITAL LETTER
+	0x00CB: 'E', //  WITH DIAERESIS, LATIN CAPITAL LETTER
+	0x00C8: 'E', //  WITH GRAVE, LATIN CAPITAL LETTER
+	0x0246: 'E', //  WITH STROKE, LATIN CAPITAL LETTER
+	0x0190: 'E', // , LATIN CAPITAL LETTER OPEN
+	0x018E: 'E', // , LATIN CAPITAL LETTER REVERSED
+	0x1D07: 'E', // , LATIN LETTER SMALL CAPITAL
+	0x0193: 'G', //  WITH HOOK, LATIN CAPITAL LETTER
+	0x029B: 'G', //  WITH HOOK, LATIN LETTER SMALL CAPITAL
+	0x0262: 'G', // , LATIN LETTER SMALL CAPITAL
+	0x029C: 'H', // , LATIN LETTER SMALL CAPITAL
+	0x00CD: 'I', //  WITH ACUTE, LATIN CAPITAL LETTER
+	0x00CE: 'I', //  WITH CIRCUMFLEX, LATIN CAPITAL LETTER
+	0x00CF: 'I', //  WITH DIAERESIS, LATIN CAPITAL LETTER
+	0x0130: 'I', //  WITH DOT ABOVE, LATIN CAPITAL LETTER
+	0x00CC: 'I', //  WITH GRAVE, LATIN CAPITAL LETTER
+	0x0197: 'I', //  WITH STROKE, LATIN CAPITAL LETTER
+	0x026A: 'I', // , LATIN LETTER SMALL CAPITAL
+	0x0248: 'J', //  WITH STROKE, LATIN CAPITAL LETTER
+	0x1D0A: 'J', // , LATIN LETTER SMALL CAPITAL
+	0x1D0B: 'K', // , LATIN LETTER SMALL CAPITAL
+	0x023D: 'L', //  WITH BAR, LATIN CAPITAL LETTER
+	0x1D0C: 'L', //  WITH STROKE, LATIN LETTER SMALL CAPITAL
+	0x029F: 'L', // , LATIN LETTER SMALL CAPITAL
+	0x019C: 'M', // , LATIN CAPITAL LETTER TURNED
+	0x1D0D: 'M', // , LATIN LETTER SMALL CAPITAL
+	0x019D: 'N', //  WITH LEFT HOOK, LATIN CAPITAL LETTER
+	0x0220: 'N', //  WITH LONG RIGHT LEG, LATIN CAPITAL LETTER
+	0x00D1: 'N', //  WITH TILDE, LATIN CAPITAL LETTER
+	0x0274: 'N', // , LATIN LETTER SMALL CAPITAL
+	0x1D0E: 'N', // , LATIN LETTER SMALL CAPITAL REVERSED
+	0x00D3: 'O', //  WITH ACUTE, LATIN CAPITAL LETTER
+	0x00D4: 'O', //  WITH CIRCUMFLEX, LATIN CAPITAL LETTER
+	0x00D6: 'O', //  WITH DIAERESIS, LATIN CAPITAL LETTER
+	0x00D2: 'O', //  WITH GRAVE, LATIN CAPITAL LETTER
+	0x019F: 'O', //  WITH MIDDLE TILDE, LATIN CAPITAL LETTER
+	0x00D8: 'O', //  WITH STROKE, LATIN CAPITAL LETTER
+	0x00D5: 'O', //  WITH TILDE, LATIN CAPITAL LETTER
+	0x0186: 'O', // , LATIN CAPITAL LETTER OPEN
+	0x1D0F: 'O', // , LATIN LETTER SMALL CAPITAL
+	0x1D10: 'O', // , LATIN LETTER SMALL CAPITAL OPEN
+	0x1D18: 'P', // , LATIN LETTER SMALL CAPITAL
+	0x024A: 'Q', //  WITH HOOK TAIL, LATIN CAPITAL LETTER SMALL
+	0x024C: 'R', //  WITH STROKE, LATIN CAPITAL LETTER
+	0x0280: 'R', // , LATIN LETTER SMALL CAPITAL
+	0x0281: 'R', // , LATIN LETTER SMALL CAPITAL INVERTED
+	0x1D19: 'R', // , LATIN LETTER SMALL CAPITAL REVERSED
+	0x1D1A: 'R', // , LATIN LETTER SMALL CAPITAL TURNED
+	0x023E: 'T', //  WITH DIAGONAL STROKE, LATIN CAPITAL LETTER
+	0x01AE: 'T', //  WITH RETROFLEX HOOK, LATIN CAPITAL LETTER
+	0x1D1B: 'T', // , LATIN LETTER SMALL CAPITAL
+	0x0244: 'U', //  BAR, LATIN CAPITAL LETTER
+	0x00DA: 'U', //  WITH ACUTE, LATIN CAPITAL LETTER
+	0x00DB: 'U', //  WITH CIRCUMFLEX, LATIN CAPITAL LETTER
+	0x00DC: 'U', //  WITH DIAERESIS, LATIN CAPITAL LETTER
+	0x00D9: 'U', //  WITH GRAVE, LATIN CAPITAL LETTER
+	0x1D1C: 'U', // , LATIN LETTER SMALL CAPITAL
+	0x01B2: 'V', //  WITH HOOK, LATIN CAPITAL LETTER
+	0x0245: 'V', // , LATIN CAPITAL LETTER TURNED
+	0x1D20: 'V', // , LATIN LETTER SMALL CAPITAL
+	0x1D21: 'W', // , LATIN LETTER SMALL CAPITAL
+	0x00DD: 'Y', //  WITH ACUTE, LATIN CAPITAL LETTER
+	0x0178: 'Y', //  WITH DIAERESIS, LATIN CAPITAL LETTER
+	0x024E: 'Y', //  WITH STROKE, LATIN CAPITAL LETTER
+	0x028F: 'Y', // , LATIN LETTER SMALL CAPITAL
+	0x1D22: 'Z', // , LATIN LETTER SMALL CAPITAL
+
+	'Ắ': 'A',
+	'Ấ': 'A',
+	'Ằ': 'A',
+	'Ầ': 'A',
+	'Ẳ': 'A',
+	'Ẩ': 'A',
+	'Ẵ': 'A',
+	'Ẫ': 'A',
+	'Ặ': 'A',
+	'Ậ': 'A',
+
+	'ắ': 'a',
+	'ấ': 'a',
+	'ằ': 'a',
+	'ầ': 'a',
+	'ẳ': 'a',
+	'ẩ': 'a',
+	'ẵ': 'a',
+	'ẫ': 'a',
+	'ặ': 'a',
+	'ậ': 'a',
+
+	'Ế': 'E',
+	'Ề': 'E',
+	'Ể': 'E',
+	'Ễ': 'E',
+	'Ệ': 'E',
+
+	'ế': 'e',
+	'ề': 'e',
+	'ể': 'e',
+	'ễ': 'e',
+	'ệ': 'e',
+
+	'Ố': 'O',
+	'Ớ': 'O',
+	'Ồ': 'O',
+	'Ờ': 'O',
+	'Ổ': 'O',
+	'Ở': 'O',
+	'Ỗ': 'O',
+	'Ỡ': 'O',
+	'Ộ': 'O',
+	'Ợ': 'O',
+
+	'ố': 'o',
+	'ớ': 'o',
+	'ồ': 'o',
+	'ờ': 'o',
+	'ổ': 'o',
+	'ở': 'o',
+	'ỗ': 'o',
+	'ỡ': 'o',
+	'ộ': 'o',
+	'ợ': 'o',
+
+	'Ứ': 'U',
+	'Ừ': 'U',
+	'Ử': 'U',
+	'Ữ': 'U',
+	'Ự': 'U',
+
+	'ứ': 'u',
+	'ừ': 'u',
+	'ử': 'u',
+	'ữ': 'u',
+	'ự': 'u',
+}
+
+// NormalizeRunes normalizes latin script letters
+func NormalizeRunes(runes []rune) []rune {
+	ret := make([]rune, len(runes))
+	copy(ret, runes)
+	for idx, r := range runes {
+		if r < 0x00C0 || r > 0x2184 {
+			continue
+		}
+		n := normalized[r]
+		if n > 0 {
+			ret[idx] = normalized[r]
+		}
+	}
+	return ret
+}

src/ansi.go

@@ -1,11 +1,11 @@
 package fzf
 
 import (
-	"bytes"
-	"regexp"
 	"strconv"
 	"strings"
 	"unicode/utf8"
+
+	"github.com/junegunn/fzf/src/tui"
 )
 
 type ansiOffset struct {
@@ -14,107 +14,348 @@ type ansiOffset struct {
 }
 
 type ansiState struct {
-	fg   int
-	bg   int
-	bold bool
+	fg   tui.Color
+	bg   tui.Color
+	attr tui.Attr
+	lbg  tui.Color
 }
 
 func (s *ansiState) colored() bool {
-	return s.fg != -1 || s.bg != -1 || s.bold
+	return s.fg != -1 || s.bg != -1 || s.attr > 0 || s.lbg >= 0
 }
 
 func (s *ansiState) equals(t *ansiState) bool {
 	if t == nil {
 		return !s.colored()
 	}
-	return s.fg == t.fg && s.bg == t.bg && s.bold == t.bold
+	return s.fg == t.fg && s.bg == t.bg && s.attr == t.attr && s.lbg == t.lbg
 }
 
-var ansiRegex *regexp.Regexp
+func (s *ansiState) ToString() string {
+	if !s.colored() {
+		return ""
+	}
 
-func init() {
-	ansiRegex = regexp.MustCompile("\x1b\\[[0-9;]*[mK]")
+	ret := ""
+	if s.attr&tui.Bold > 0 {
+		ret += "1;"
+	}
+	if s.attr&tui.Dim > 0 {
+		ret += "2;"
+	}
+	if s.attr&tui.Italic > 0 {
+		ret += "3;"
+	}
+	if s.attr&tui.Underline > 0 {
+		ret += "4;"
+	}
+	if s.attr&tui.Blink > 0 {
+		ret += "5;"
+	}
+	if s.attr&tui.Reverse > 0 {
+		ret += "7;"
+	}
+	if s.attr&tui.StrikeThrough > 0 {
+		ret += "9;"
+	}
+	ret += toAnsiString(s.fg, 30) + toAnsiString(s.bg, 40)
+
+	return "\x1b[" + strings.TrimSuffix(ret, ";") + "m"
 }
 
-func extractColor(str string, state *ansiState, proc func(string, *ansiState) bool) (string, []ansiOffset, *ansiState) {
-	var offsets []ansiOffset
-	var output bytes.Buffer
+func toAnsiString(color tui.Color, offset int) string {
+	col := int(color)
+	ret := ""
+	if col == -1 {
+		ret += strconv.Itoa(offset + 9)
+	} else if col < 8 {
+		ret += strconv.Itoa(offset + col)
+	} else if col < 16 {
+		ret += strconv.Itoa(offset - 30 + 90 + col - 8)
+	} else if col < 256 {
+		ret += strconv.Itoa(offset+8) + ";5;" + strconv.Itoa(col)
+	} else if col >= (1 << 24) {
+		r := strconv.Itoa((col >> 16) & 0xff)
+		g := strconv.Itoa((col >> 8) & 0xff)
+		b := strconv.Itoa(col & 0xff)
+		ret += strconv.Itoa(offset+8) + ";2;" + r + ";" + g + ";" + b
+	}
+	return ret + ";"
+}
+
+func isPrint(c uint8) bool {
+	return '\x20' <= c && c <= '\x7e'
+}
+
+func matchOperatingSystemCommand(s string) int {
+	// `\x1b][0-9][;:][[:print:]]+(?:\x1b\\\\|\x07)`
+	//                        ^ match starting here
+	//
+	i := 5 // prefix matched in nextAnsiEscapeSequence()
+	for ; i < len(s) && isPrint(s[i]); i++ {
+	}
+	if i < len(s) {
+		if s[i] == '\x07' {
+			return i + 1
+		}
+		if s[i] == '\x1b' && i < len(s)-1 && s[i+1] == '\\' {
+			return i + 2
+		}
+	}
+	return -1
+}
+
+func matchControlSequence(s string) int {
+	// `\x1b[\\[()][0-9;:?]*[a-zA-Z@]`
+	//                     ^ match starting here
+	//
+	i := 2 // prefix matched in nextAnsiEscapeSequence()
+	for ; i < len(s); i++ {
+		c := s[i]
+		switch c {
+		case '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', ';', ':', '?':
+			// ok
+		default:
+			if 'a' <= c && c <= 'z' || 'A' <= c && c <= 'Z' || c == '@' {
+				return i + 1
+			}
+			return -1
+		}
+	}
+	return -1
+}
+
+func isCtrlSeqStart(c uint8) bool {
+	switch c {
+	case '\\', '[', '(', ')':
+		return true
+	}
+	return false
+}
+
+// nextAnsiEscapeSequence returns the ANSI escape sequence and is equivalent to
+// calling FindStringIndex() on the below regex (which was originally used):
+//
+// "(?:\x1b[\\[()][0-9;:?]*[a-zA-Z@]|\x1b][0-9][;:][[:print:]]+(?:\x1b\\\\|\x07)|\x1b.|[\x0e\x0f]|.\x08)"
+func nextAnsiEscapeSequence(s string) (int, int) {
+	// fast check for ANSI escape sequences
+	i := 0
+	for ; i < len(s); i++ {
+		switch s[i] {
+		case '\x0e', '\x0f', '\x1b', '\x08':
+			// We ignore the fact that '\x08' cannot be the first char
+			// in the string and be an escape sequence for the sake of
+			// speed and simplicity.
+			goto Loop
+		}
+	}
+	return -1, -1
+
+Loop:
+	for ; i < len(s); i++ {
+		switch s[i] {
+		case '\x08':
+			// backtrack to match: `.\x08`
+			if i > 0 && s[i-1] != '\n' {
+				if s[i-1] < utf8.RuneSelf {
+					return i - 1, i + 1
+				}
+				_, n := utf8.DecodeLastRuneInString(s[:i])
+				return i - n, i + 1
+			}
+		case '\x1b':
+			// match: `\x1b[\\[()][0-9;:?]*[a-zA-Z@]`
+			if i+2 < len(s) && isCtrlSeqStart(s[i+1]) {
+				if j := matchControlSequence(s[i:]); j != -1 {
+					return i, i + j
+				}
+			}
+
+			// match: `\x1b][0-9][;:][[:print:]]+(?:\x1b\\\\|\x07)`
+			if i+5 < len(s) && s[i+1] == ']' && isNumeric(s[i+2]) &&
+				(s[i+3] == ';' || s[i+3] == ':') && isPrint(s[i+4]) {
+
+				if j := matchOperatingSystemCommand(s[i:]); j != -1 {
+					return i, i + j
+				}
+			}
+
+			// match: `\x1b.`
+			if i+1 < len(s) && s[i+1] != '\n' {
+				if s[i+1] < utf8.RuneSelf {
+					return i, i + 2
+				}
+				_, n := utf8.DecodeRuneInString(s[i+1:])
+				return i, i + n + 1
+			}
+		case '\x0e', '\x0f':
+			// match: `[\x0e\x0f]`
+			return i, i + 1
+		}
+	}
+	return -1, -1
+}
+
+func extractColor(str string, state *ansiState, proc func(string, *ansiState) bool) (string, *[]ansiOffset, *ansiState) {
+	// We append to a stack allocated variable that we'll
+	// later copy and return, to save on allocations.
+	offsets := make([]ansiOffset, 0, 32)
 
 	if state != nil {
 		offsets = append(offsets, ansiOffset{[2]int32{0, 0}, *state})
 	}
 
-	idx := 0
-	for _, offset := range ansiRegex.FindAllStringIndex(str, -1) {
-		prev := str[idx:offset[0]]
-		output.WriteString(prev)
-		if proc != nil && !proc(prev, state) {
+	var (
+		pstate    *ansiState // lazily allocated
+		output    strings.Builder
+		prevIdx   int
+		runeCount int
+	)
+	for idx := 0; idx < len(str); {
+		// Make sure that we found an ANSI code
+		start, end := nextAnsiEscapeSequence(str[idx:])
+		if start == -1 {
 			break
 		}
-		newState := interpretCode(str[offset[0]:offset[1]], state)
+		start += idx
+		idx += end
 
+		// Check if we should continue
+		prev := str[prevIdx:start]
+		if proc != nil && !proc(prev, state) {
+			return "", nil, nil
+		}
+		prevIdx = idx
+
+		if len(prev) != 0 {
+			runeCount += utf8.RuneCountInString(prev)
+			// Grow the buffer size to the maximum possible length (string length
+			// containing ansi codes) to avoid repetitive allocation
+			if output.Cap() == 0 {
+				output.Grow(len(str))
+			}
+			output.WriteString(prev)
+		}
+
+		newState := interpretCode(str[start:idx], state)
 		if !newState.equals(state) {
 			if state != nil {
 				// Update last offset
-				(&offsets[len(offsets)-1]).offset[1] = int32(utf8.RuneCount(output.Bytes()))
+				(&offsets[len(offsets)-1]).offset[1] = int32(runeCount)
 			}
 
 			if newState.colored() {
 				// Append new offset
-				state = newState
-				newLen := int32(utf8.RuneCount(output.Bytes()))
-				offsets = append(offsets, ansiOffset{[2]int32{newLen, newLen}, *state})
+				if pstate == nil {
+					pstate = &ansiState{}
+				}
+				*pstate = newState
+				state = pstate
+				offsets = append(offsets, ansiOffset{
+					[2]int32{int32(runeCount), int32(runeCount)},
+					newState,
+				})
 			} else {
 				// Discard state
 				state = nil
 			}
 		}
-
-		idx = offset[1]
 	}
 
-	rest := str[idx:]
-	if len(rest) > 0 {
+	var rest string
+	var trimmed string
+	if prevIdx == 0 {
+		// No ANSI code found
+		rest = str
+		trimmed = str
+	} else {
+		rest = str[prevIdx:]
 		output.WriteString(rest)
-		if state != nil {
-			// Update last offset
-			(&offsets[len(offsets)-1]).offset[1] = int32(utf8.RuneCount(output.Bytes()))
-		}
+		trimmed = output.String()
 	}
 	if proc != nil {
 		proc(rest, state)
 	}
-	return output.String(), offsets, state
+	if len(offsets) > 0 {
+		if len(rest) > 0 && state != nil {
+			// Update last offset
+			runeCount += utf8.RuneCountInString(rest)
+			(&offsets[len(offsets)-1]).offset[1] = int32(runeCount)
+		}
+		// Return a copy of the offsets slice
+		a := make([]ansiOffset, len(offsets))
+		copy(a, offsets)
+		return trimmed, &a, state
+	}
+	return trimmed, nil, state
 }
 
-func interpretCode(ansiCode string, prevState *ansiState) *ansiState {
-	// State
-	var state *ansiState
-	if prevState == nil {
-		state = &ansiState{-1, -1, false}
+func parseAnsiCode(s string, delimiter byte) (int, byte, string) {
+	var remaining string
+	i := -1
+	if delimiter == 0 {
+		// Faster than strings.IndexAny(";:")
+		i = strings.IndexByte(s, ';')
+		if i < 0 {
+			i = strings.IndexByte(s, ':')
+		}
 	} else {
-		state = &ansiState{prevState.fg, prevState.bg, prevState.bold}
+		i = strings.IndexByte(s, delimiter)
 	}
-	if ansiCode[len(ansiCode)-1] == 'K' {
+	if i >= 0 {
+		delimiter = s[i]
+		remaining = s[i+1:]
+		s = s[:i]
+	}
+
+	if len(s) > 0 {
+		// Inlined version of strconv.Atoi() that only handles positive
+		// integers and does not allocate on error.
+		code := 0
+		for _, ch := range []byte(s) {
+			ch -= '0'
+			if ch > 9 {
+				return -1, delimiter, remaining
+			}
+			code = code*10 + int(ch)
+		}
+		return code, delimiter, remaining
+	}
+
+	return -1, delimiter, remaining
+}
+
+func interpretCode(ansiCode string, prevState *ansiState) ansiState {
+	var state ansiState
+	if prevState == nil {
+		state = ansiState{-1, -1, 0, -1}
+	} else {
+		state = ansiState{prevState.fg, prevState.bg, prevState.attr, prevState.lbg}
+	}
+	if ansiCode[0] != '\x1b' || ansiCode[1] != '[' || ansiCode[len(ansiCode)-1] != 'm' {
+		if prevState != nil && strings.HasSuffix(ansiCode, "0K") {
+			state.lbg = prevState.bg
+		}
 		return state
 	}
 
-	ptr := &state.fg
-	state256 := 0
-
-	init := func() {
+	if len(ansiCode) <= 3 {
 		state.fg = -1
 		state.bg = -1
-		state.bold = false
-		state256 = 0
+		state.attr = 0
+		return state
 	}
-
 	ansiCode = ansiCode[2 : len(ansiCode)-1]
-	if len(ansiCode) == 0 {
-		init()
-	}
-	for _, code := range strings.Split(ansiCode, ";") {
-		if num, err := strconv.Atoi(code); err == nil {
+
+	state256 := 0
+	ptr := &state.fg
+
+	var delimiter byte = 0
+	count := 0
+	for len(ansiCode) != 0 {
+		var num int
+		if num, delimiter, ansiCode = parseAnsiCode(ansiCode, delimiter); num != -1 {
+			count++
 			switch state256 {
 			case 0:
 				switch num {
@@ -129,28 +370,82 @@ func interpretCode(ansiCode string, prevState *ansiState) *ansiState {
 				case 49:
 					state.bg = -1
 				case 1:
-					state.bold = true
+					state.attr = state.attr | tui.Bold
+				case 2:
+					state.attr = state.attr | tui.Dim
+				case 3:
+					state.attr = state.attr | tui.Italic
+				case 4:
+					state.attr = state.attr | tui.Underline
+				case 5:
+					state.attr = state.attr | tui.Blink
+				case 7:
+					state.attr = state.attr | tui.Reverse
+				case 9:
+					state.attr = state.attr | tui.StrikeThrough
+				case 22:
+					state.attr = state.attr &^ tui.Bold
+					state.attr = state.attr &^ tui.Dim
+				case 23: // tput rmso
+					state.attr = state.attr &^ tui.Italic
+				case 24: // tput rmul
+					state.attr = state.attr &^ tui.Underline
+				case 25:
+					state.attr = state.attr &^ tui.Blink
+				case 27:
+					state.attr = state.attr &^ tui.Reverse
+				case 29:
+					state.attr = state.attr &^ tui.StrikeThrough
 				case 0:
-					init()
+					state.fg = -1
+					state.bg = -1
+					state.attr = 0
+					state256 = 0
 				default:
 					if num >= 30 && num <= 37 {
-						state.fg = num - 30
+						state.fg = tui.Color(num - 30)
 					} else if num >= 40 && num <= 47 {
-						state.bg = num - 40
+						state.bg = tui.Color(num - 40)
+					} else if num >= 90 && num <= 97 {
+						state.fg = tui.Color(num - 90 + 8)
+					} else if num >= 100 && num <= 107 {
+						state.bg = tui.Color(num - 100 + 8)
 					}
 				}
 			case 1:
 				switch num {
+				case 2:
+					state256 = 10 // MAGIC
 				case 5:
 					state256++
 				default:
 					state256 = 0
 				}
 			case 2:
-				*ptr = num
+				*ptr = tui.Color(num)
+				state256 = 0
+			case 10:
+				*ptr = tui.Color(1<<24) | tui.Color(num<<16)
+				state256++
+			case 11:
+				*ptr = *ptr | tui.Color(num<<8)
+				state256++
+			case 12:
+				*ptr = *ptr | tui.Color(num)
 				state256 = 0
 			}
 		}
 	}
+
+	// Empty sequence: reset
+	if count == 0 {
+		state.fg = -1
+		state.bg = -1
+		state.attr = 0
+	}
+
+	if state256 > 0 {
+		*ptr = -1
+	}
 	return state
 }

src/ansi_test.go

@@ -1,152 +1,431 @@
 package fzf
 
 import (
-	"fmt"
+	"math/rand"
+	"regexp"
+	"strings"
 	"testing"
+	"unicode/utf8"
+
+	"github.com/junegunn/fzf/src/tui"
 )
 
+// The following regular expression will include not all but most of the
+// frequently used ANSI sequences. This regex is used as a reference for
+// testing nextAnsiEscapeSequence().
+//
+// References:
+//   - https://github.com/gnachman/iTerm2
+//   - https://web.archive.org/web/20090204053813/http://ascii-table.com/ansi-escape-sequences.php
+//     (archived from http://ascii-table.com/ansi-escape-sequences.php)
+//   - https://web.archive.org/web/20090227051140/http://ascii-table.com/ansi-escape-sequences-vt-100.php
+//     (archived from http://ascii-table.com/ansi-escape-sequences-vt-100.php)
+//   - http://tldp.org/HOWTO/Bash-Prompt-HOWTO/x405.html
+//   - https://invisible-island.net/xterm/ctlseqs/ctlseqs.html
+var ansiRegexReference = regexp.MustCompile("(?:\x1b[\\[()][0-9;:]*[a-zA-Z@]|\x1b][0-9][;:][[:print:]]+(?:\x1b\\\\|\x07)|\x1b.|[\x0e\x0f]|.\x08)")
+
+func testParserReference(t testing.TB, str string) {
+	t.Helper()
+
+	toSlice := func(start, end int) []int {
+		if start == -1 {
+			return nil
+		}
+		return []int{start, end}
+	}
+
+	s := str
+	for i := 0; ; i++ {
+		got := toSlice(nextAnsiEscapeSequence(s))
+		exp := ansiRegexReference.FindStringIndex(s)
+
+		equal := len(got) == len(exp)
+		if equal {
+			for i := 0; i < len(got); i++ {
+				if got[i] != exp[i] {
+					equal = false
+					break
+				}
+			}
+		}
+		if !equal {
+			var exps, gots []rune
+			if len(got) == 2 {
+				gots = []rune(s[got[0]:got[1]])
+			}
+			if len(exp) == 2 {
+				exps = []rune(s[exp[0]:exp[1]])
+			}
+			t.Errorf("%d: %q: got: %v (%q) want: %v (%q)", i, s, got, gots, exp, exps)
+			return
+		}
+		if len(exp) == 0 {
+			return
+		}
+		s = s[exp[1]:]
+	}
+}
+
+func TestNextAnsiEscapeSequence(t *testing.T) {
+	testStrs := []string{
+		"\x1b[0mhello world",
+		"\x1b[1mhello world",
+		"椙\x1b[1m椙",
+		"椙\x1b[1椙m椙",
+		"\x1b[1mhello \x1b[mw\x1b7o\x1b8r\x1b(Bl\x1b[2@d",
+		"\x1b[1mhello \x1b[Kworld",
+		"hello \x1b[34;45;1mworld",
+		"hello \x1b[34;45;1mwor\x1b[34;45;1mld",
+		"hello \x1b[34;45;1mwor\x1b[0mld",
+		"hello \x1b[34;48;5;233;1mwo\x1b[38;5;161mr\x1b[0ml\x1b[38;5;161md",
+		"hello \x1b[38;5;38;48;5;48;1mwor\x1b[38;5;48;48;5;38ml\x1b[0md",
+		"hello \x1b[32;1mworld",
+		"hello world",
+		"hello \x1b[0;38;5;200;48;5;100mworld",
+		"\x1b椙",
+		"椙\x08",
+		"\n\x08",
+		"X\x08",
+		"",
+		"\x1b]4;3;rgb:aa/bb/cc\x07 ",
+		"\x1b]4;3;rgb:aa/bb/cc\x1b\\ ",
+		ansiBenchmarkString,
+	}
+
+	for _, s := range testStrs {
+		testParserReference(t, s)
+	}
+}
+
+func TestNextAnsiEscapeSequence_Fuzz_Modified(t *testing.T) {
+	t.Parallel()
+	if testing.Short() {
+		t.Skip("short test")
+	}
+
+	testStrs := []string{
+		"\x1b[0mhello world",
+		"\x1b[1mhello world",
+		"椙\x1b[1m椙",
+		"椙\x1b[1椙m椙",
+		"\x1b[1mhello \x1b[mw\x1b7o\x1b8r\x1b(Bl\x1b[2@d",
+		"\x1b[1mhello \x1b[Kworld",
+		"hello \x1b[34;45;1mworld",
+		"hello \x1b[34;45;1mwor\x1b[34;45;1mld",
+		"hello \x1b[34;45;1mwor\x1b[0mld",
+		"hello \x1b[34;48;5;233;1mwo\x1b[38;5;161mr\x1b[0ml\x1b[38;5;161md",
+		"hello \x1b[38;5;38;48;5;48;1mwor\x1b[38;5;48;48;5;38ml\x1b[0md",
+		"hello \x1b[32;1mworld",
+		"hello world",
+		"hello \x1b[0;38;5;200;48;5;100mworld",
+		ansiBenchmarkString,
+	}
+
+	replacementBytes := [...]rune{'\x0e', '\x0f', '\x1b', '\x08'}
+
+	modifyString := func(s string, rr *rand.Rand) string {
+		n := rr.Intn(len(s))
+		b := []rune(s)
+		for ; n >= 0 && len(b) != 0; n-- {
+			i := rr.Intn(len(b))
+			switch x := rr.Intn(4); x {
+			case 0:
+				b = append(b[:i], b[i+1:]...)
+			case 1:
+				j := rr.Intn(len(replacementBytes) - 1)
+				b[i] = replacementBytes[j]
+			case 2:
+				x := rune(rr.Intn(utf8.MaxRune))
+				for !utf8.ValidRune(x) {
+					x = rune(rr.Intn(utf8.MaxRune))
+				}
+				b[i] = x
+			case 3:
+				b[i] = rune(rr.Intn(utf8.MaxRune)) // potentially invalid
+			default:
+				t.Fatalf("unsupported value: %d", x)
+			}
+		}
+		return string(b)
+	}
+
+	rr := rand.New(rand.NewSource(1))
+	for _, s := range testStrs {
+		for i := 1_000; i >= 0; i-- {
+			testParserReference(t, modifyString(s, rr))
+		}
+	}
+}
+
+func TestNextAnsiEscapeSequence_Fuzz_Random(t *testing.T) {
+	t.Parallel()
+
+	if testing.Short() {
+		t.Skip("short test")
+	}
+
+	randomString := func(rr *rand.Rand) string {
+		numChars := rand.Intn(50)
+		codePoints := make([]rune, numChars)
+		for i := 0; i < len(codePoints); i++ {
+			var r rune
+			for n := 0; n < 1000; n++ {
+				r = rune(rr.Intn(utf8.MaxRune))
+				// Allow 10% of runes to be invalid
+				if utf8.ValidRune(r) || rr.Float64() < 0.10 {
+					break
+				}
+			}
+			codePoints[i] = r
+		}
+		return string(codePoints)
+	}
+
+	rr := rand.New(rand.NewSource(1))
+	for i := 0; i < 100_000; i++ {
+		testParserReference(t, randomString(rr))
+	}
+}
+
 func TestExtractColor(t *testing.T) {
-	assert := func(offset ansiOffset, b int32, e int32, fg int, bg int, bold bool) {
+	assert := func(offset ansiOffset, b int32, e int32, fg tui.Color, bg tui.Color, bold bool) {
+		var attr tui.Attr
+		if bold {
+			attr = tui.Bold
+		}
 		if offset.offset[0] != b || offset.offset[1] != e ||
-			offset.color.fg != fg || offset.color.bg != bg || offset.color.bold != bold {
-			t.Error(offset, b, e, fg, bg, bold)
+			offset.color.fg != fg || offset.color.bg != bg || offset.color.attr != attr {
+			t.Error(offset, b, e, fg, bg, attr)
 		}
 	}
 
 	src := "hello world"
 	var state *ansiState
 	clean := "\x1b[0m"
-	check := func(assertion func(ansiOffsets []ansiOffset, state *ansiState)) {
+	check := func(assertion func(ansiOffsets *[]ansiOffset, state *ansiState)) {
 		output, ansiOffsets, newState := extractColor(src, state, nil)
 		state = newState
 		if output != "hello world" {
-			t.Errorf("Invalid output: {}", output)
+			t.Errorf("Invalid output: %s %v", output, []rune(output))
 		}
-		fmt.Println(src, ansiOffsets, clean)
+		t.Log(src, ansiOffsets, clean)
 		assertion(ansiOffsets, state)
 	}
 
-	check(func(offsets []ansiOffset, state *ansiState) {
-		if len(offsets) > 0 {
+	check(func(offsets *[]ansiOffset, state *ansiState) {
+		if offsets != nil {
 			t.Fail()
 		}
 	})
 
 	state = nil
 	src = "\x1b[0mhello world"
-	check(func(offsets []ansiOffset, state *ansiState) {
-		if len(offsets) > 0 {
+	check(func(offsets *[]ansiOffset, state *ansiState) {
+		if offsets != nil {
 			t.Fail()
 		}
 	})
 
 	state = nil
 	src = "\x1b[1mhello world"
-	check(func(offsets []ansiOffset, state *ansiState) {
-		if len(offsets) != 1 {
+	check(func(offsets *[]ansiOffset, state *ansiState) {
+		if len(*offsets) != 1 {
 			t.Fail()
 		}
-		assert(offsets[0], 0, 11, -1, -1, true)
+		assert((*offsets)[0], 0, 11, -1, -1, true)
 	})
 
 	state = nil
-	src = "\x1b[1mhello \x1b[mworld"
-	check(func(offsets []ansiOffset, state *ansiState) {
-		if len(offsets) != 1 {
+	src = "\x1b[1mhello \x1b[mw\x1b7o\x1b8r\x1b(Bl\x1b[2@d"
+	check(func(offsets *[]ansiOffset, state *ansiState) {
+		if len(*offsets) != 1 {
 			t.Fail()
 		}
-		assert(offsets[0], 0, 6, -1, -1, true)
+		assert((*offsets)[0], 0, 6, -1, -1, true)
 	})
 
 	state = nil
 	src = "\x1b[1mhello \x1b[Kworld"
-	check(func(offsets []ansiOffset, state *ansiState) {
-		if len(offsets) != 1 {
+	check(func(offsets *[]ansiOffset, state *ansiState) {
+		if len(*offsets) != 1 {
 			t.Fail()
 		}
-		assert(offsets[0], 0, 11, -1, -1, true)
+		assert((*offsets)[0], 0, 11, -1, -1, true)
 	})
 
 	state = nil
 	src = "hello \x1b[34;45;1mworld"
-	check(func(offsets []ansiOffset, state *ansiState) {
-		if len(offsets) != 1 {
+	check(func(offsets *[]ansiOffset, state *ansiState) {
+		if len(*offsets) != 1 {
 			t.Fail()
 		}
-		assert(offsets[0], 6, 11, 4, 5, true)
+		assert((*offsets)[0], 6, 11, 4, 5, true)
 	})
 
 	state = nil
 	src = "hello \x1b[34;45;1mwor\x1b[34;45;1mld"
-	check(func(offsets []ansiOffset, state *ansiState) {
-		if len(offsets) != 1 {
+	check(func(offsets *[]ansiOffset, state *ansiState) {
+		if len(*offsets) != 1 {
 			t.Fail()
 		}
-		assert(offsets[0], 6, 11, 4, 5, true)
+		assert((*offsets)[0], 6, 11, 4, 5, true)
 	})
 
 	state = nil
 	src = "hello \x1b[34;45;1mwor\x1b[0mld"
-	check(func(offsets []ansiOffset, state *ansiState) {
-		if len(offsets) != 1 {
+	check(func(offsets *[]ansiOffset, state *ansiState) {
+		if len(*offsets) != 1 {
 			t.Fail()
 		}
-		assert(offsets[0], 6, 9, 4, 5, true)
+		assert((*offsets)[0], 6, 9, 4, 5, true)
 	})
 
 	state = nil
 	src = "hello \x1b[34;48;5;233;1mwo\x1b[38;5;161mr\x1b[0ml\x1b[38;5;161md"
-	check(func(offsets []ansiOffset, state *ansiState) {
-		if len(offsets) != 3 {
+	check(func(offsets *[]ansiOffset, state *ansiState) {
+		if len(*offsets) != 3 {
 			t.Fail()
 		}
-		assert(offsets[0], 6, 8, 4, 233, true)
-		assert(offsets[1], 8, 9, 161, 233, true)
-		assert(offsets[2], 10, 11, 161, -1, false)
+		assert((*offsets)[0], 6, 8, 4, 233, true)
+		assert((*offsets)[1], 8, 9, 161, 233, true)
+		assert((*offsets)[2], 10, 11, 161, -1, false)
 	})
 
 	// {38,48};5;{38,48}
 	state = nil
 	src = "hello \x1b[38;5;38;48;5;48;1mwor\x1b[38;5;48;48;5;38ml\x1b[0md"
-	check(func(offsets []ansiOffset, state *ansiState) {
-		if len(offsets) != 2 {
+	check(func(offsets *[]ansiOffset, state *ansiState) {
+		if len(*offsets) != 2 {
 			t.Fail()
 		}
-		assert(offsets[0], 6, 9, 38, 48, true)
-		assert(offsets[1], 9, 10, 48, 38, true)
+		assert((*offsets)[0], 6, 9, 38, 48, true)
+		assert((*offsets)[1], 9, 10, 48, 38, true)
 	})
 
 	src = "hello \x1b[32;1mworld"
-	check(func(offsets []ansiOffset, state *ansiState) {
-		if len(offsets) != 1 {
+	check(func(offsets *[]ansiOffset, state *ansiState) {
+		if len(*offsets) != 1 {
 			t.Fail()
 		}
-		if state.fg != 2 || state.bg != -1 || !state.bold {
+		if state.fg != 2 || state.bg != -1 || state.attr == 0 {
 			t.Fail()
 		}
-		assert(offsets[0], 6, 11, 2, -1, true)
+		assert((*offsets)[0], 6, 11, 2, -1, true)
 	})
 
 	src = "hello world"
-	check(func(offsets []ansiOffset, state *ansiState) {
-		if len(offsets) != 1 {
+	check(func(offsets *[]ansiOffset, state *ansiState) {
+		if len(*offsets) != 1 {
 			t.Fail()
 		}
-		if state.fg != 2 || state.bg != -1 || !state.bold {
+		if state.fg != 2 || state.bg != -1 || state.attr == 0 {
 			t.Fail()
 		}
-		assert(offsets[0], 0, 11, 2, -1, true)
+		assert((*offsets)[0], 0, 11, 2, -1, true)
 	})
 
 	src = "hello \x1b[0;38;5;200;48;5;100mworld"
-	check(func(offsets []ansiOffset, state *ansiState) {
-		if len(offsets) != 2 {
+	check(func(offsets *[]ansiOffset, state *ansiState) {
+		if len(*offsets) != 2 {
 			t.Fail()
 		}
-		if state.fg != 200 || state.bg != 100 || state.bold {
+		if state.fg != 200 || state.bg != 100 || state.attr > 0 {
 			t.Fail()
 		}
-		assert(offsets[0], 0, 6, 2, -1, true)
-		assert(offsets[1], 6, 11, 200, 100, false)
+		assert((*offsets)[0], 0, 6, 2, -1, true)
+		assert((*offsets)[1], 6, 11, 200, 100, false)
 	})
 }
+
+func TestAnsiCodeStringConversion(t *testing.T) {
+	assert := func(code string, prevState *ansiState, expected string) {
+		state := interpretCode(code, prevState)
+		if expected != state.ToString() {
+			t.Errorf("expected: %s, actual: %s",
+				strings.Replace(expected, "\x1b[", "\\x1b[", -1),
+				strings.Replace(state.ToString(), "\x1b[", "\\x1b[", -1))
+		}
+	}
+	assert("\x1b[m", nil, "")
+	assert("\x1b[m", &ansiState{attr: tui.Blink, lbg: -1}, "")
+	assert("\x1b[0m", &ansiState{fg: 4, bg: 4, lbg: -1}, "")
+	assert("\x1b[;m", &ansiState{fg: 4, bg: 4, lbg: -1}, "")
+	assert("\x1b[;;m", &ansiState{fg: 4, bg: 4, lbg: -1}, "")
+
+	assert("\x1b[31m", nil, "\x1b[31;49m")
+	assert("\x1b[41m", nil, "\x1b[39;41m")
+
+	assert("\x1b[92m", nil, "\x1b[92;49m")
+	assert("\x1b[102m", nil, "\x1b[39;102m")
+
+	assert("\x1b[31m", &ansiState{fg: 4, bg: 4, lbg: -1}, "\x1b[31;44m")
+	assert("\x1b[1;2;31m", &ansiState{fg: 2, bg: -1, attr: tui.Reverse, lbg: -1}, "\x1b[1;2;7;31;49m")
+	assert("\x1b[38;5;100;48;5;200m", nil, "\x1b[38;5;100;48;5;200m")
+	assert("\x1b[38:5:100:48:5:200m", nil, "\x1b[38;5;100;48;5;200m")
+	assert("\x1b[48;5;100;38;5;200m", nil, "\x1b[38;5;200;48;5;100m")
+	assert("\x1b[48;5;100;38;2;10;20;30;1m", nil, "\x1b[1;38;2;10;20;30;48;5;100m")
+	assert("\x1b[48;5;100;38;2;10;20;30;7m",
+		&ansiState{attr: tui.Dim | tui.Italic, fg: 1, bg: 1},
+		"\x1b[2;3;7;38;2;10;20;30;48;5;100m")
+}
+
+func TestParseAnsiCode(t *testing.T) {
+	tests := []struct {
+		In, Exp string
+		N       int
+	}{
+		{"123", "", 123},
+		{"1a", "", -1},
+		{"1a;12", "12", -1},
+		{"12;a", "a", 12},
+		{"-2", "", -1},
+	}
+	for _, x := range tests {
+		n, _, s := parseAnsiCode(x.In, 0)
+		if n != x.N || s != x.Exp {
+			t.Fatalf("%q: got: (%d %q) want: (%d %q)", x.In, n, s, x.N, x.Exp)
+		}
+	}
+}
+
+// kernel/bpf/preload/iterators/README
+const ansiBenchmarkString = "\x1b[38;5;81m\x1b[01;31m\x1b[Kkernel/\x1b[0m\x1b[38:5:81mbpf/" +
+	"\x1b[0m\x1b[38:5:81mpreload/\x1b[0m\x1b[38;5;81miterators/" +
+	"\x1b[0m\x1b[38:5:149mMakefile\x1b[m\x1b[K\x1b[0m"
+
+func BenchmarkNextAnsiEscapeSequence(b *testing.B) {
+	b.SetBytes(int64(len(ansiBenchmarkString)))
+	for i := 0; i < b.N; i++ {
+		s := ansiBenchmarkString
+		for {
+			_, o := nextAnsiEscapeSequence(s)
+			if o == -1 {
+				break
+			}
+			s = s[o:]
+		}
+	}
+}
+
+// Baseline test to compare the speed of nextAnsiEscapeSequence() to the
+// previously used regex based implementation.
+func BenchmarkNextAnsiEscapeSequence_Regex(b *testing.B) {
+	b.SetBytes(int64(len(ansiBenchmarkString)))
+	for i := 0; i < b.N; i++ {
+		s := ansiBenchmarkString
+		for {
+			a := ansiRegexReference.FindStringIndex(s)
+			if len(a) == 0 {
+				break
+			}
+			s = s[a[1]:]
+		}
+	}
+}
+
+func BenchmarkExtractColor(b *testing.B) {
+	b.SetBytes(int64(len(ansiBenchmarkString)))
+	for i := 0; i < b.N; i++ {
+		extractColor(ansiBenchmarkString, nil, nil)
+	}
+}

src/cache.go

@@ -3,7 +3,7 @@ package fzf
 import "sync"
 
 // queryCache associates strings to lists of items
-type queryCache map[string][]*Item
+type queryCache map[string][]Result
 
 // ChunkCache associates Chunk and query string to lists of items
 type ChunkCache struct {
@@ -17,7 +17,7 @@ func NewChunkCache() ChunkCache {
 }
 
 // Add adds the list to the cache
-func (cc *ChunkCache) Add(chunk *Chunk, key string, list []*Item) {
+func (cc *ChunkCache) Add(chunk *Chunk, key string, list []Result) {
 	if len(key) == 0 || !chunk.IsFull() || len(list) > queryCacheMax {
 		return
 	}
@@ -33,10 +33,10 @@ func (cc *ChunkCache) Add(chunk *Chunk, key string, list []*Item) {
 	(*qc)[key] = list
 }
 
-// Find is called to lookup ChunkCache
-func (cc *ChunkCache) Find(chunk *Chunk, key string) ([]*Item, bool) {
+// Lookup is called to lookup ChunkCache
+func (cc *ChunkCache) Lookup(chunk *Chunk, key string) []Result {
 	if len(key) == 0 || !chunk.IsFull() {
-		return nil, false
+		return nil
 	}
 
 	cc.mutex.Lock()
@@ -46,8 +46,36 @@ func (cc *ChunkCache) Find(chunk *Chunk, key string) ([]*Item, bool) {
 	if ok {
 		list, ok := (*qc)[key]
 		if ok {
-			return list, true
+			return list
 		}
 	}
-	return nil, false
+	return nil
+}
+
+func (cc *ChunkCache) Search(chunk *Chunk, key string) []Result {
+	if len(key) == 0 || !chunk.IsFull() {
+		return nil
+	}
+
+	cc.mutex.Lock()
+	defer cc.mutex.Unlock()
+
+	qc, ok := cc.cache[chunk]
+	if !ok {
+		return nil
+	}
+
+	for idx := 1; idx < len(key); idx++ {
+		// [---------| ] | [ |---------]
+		// [--------|  ] | [  |--------]
+		// [-------|   ] | [   |-------]
+		prefix := key[:len(key)-idx]
+		suffix := key[idx:]
+		for _, substr := range [2]string{prefix, suffix} {
+			if cached, found := (*qc)[substr]; found {
+				return cached
+			}
+		}
+	}
+	return nil
 }

src/cache_test.go

@@ -4,37 +4,36 @@ import "testing"
 
 func TestChunkCache(t *testing.T) {
 	cache := NewChunkCache()
-	chunk2 := make(Chunk, chunkSize)
 	chunk1p := &Chunk{}
-	chunk2p := &chunk2
-	items1 := []*Item{&Item{}}
-	items2 := []*Item{&Item{}, &Item{}}
+	chunk2p := &Chunk{count: chunkSize}
+	items1 := []Result{{}}
+	items2 := []Result{{}, {}}
 	cache.Add(chunk1p, "foo", items1)
 	cache.Add(chunk2p, "foo", items1)
 	cache.Add(chunk2p, "bar", items2)
 
 	{ // chunk1 is not full
-		cached, found := cache.Find(chunk1p, "foo")
-		if found {
-			t.Error("Cached disabled for non-empty chunks", found, cached)
+		cached := cache.Lookup(chunk1p, "foo")
+		if cached != nil {
+			t.Error("Cached disabled for non-empty chunks", cached)
 		}
 	}
 	{
-		cached, found := cache.Find(chunk2p, "foo")
-		if !found || len(cached) != 1 {
-			t.Error("Expected 1 item cached", found, cached)
+		cached := cache.Lookup(chunk2p, "foo")
+		if cached == nil || len(cached) != 1 {
+			t.Error("Expected 1 item cached", cached)
 		}
 	}
 	{
-		cached, found := cache.Find(chunk2p, "bar")
-		if !found || len(cached) != 2 {
-			t.Error("Expected 2 items cached", found, cached)
+		cached := cache.Lookup(chunk2p, "bar")
+		if cached == nil || len(cached) != 2 {
+			t.Error("Expected 2 items cached", cached)
 		}
 	}
 	{
-		cached, found := cache.Find(chunk1p, "foobar")
-		if found {
-			t.Error("Expected 0 item cached", found, cached)
+		cached := cache.Lookup(chunk1p, "foobar")
+		if cached != nil {
+			t.Error("Expected 0 item cached", cached)
 		}
 	}
 }

src/chunklist.go

@@ -2,17 +2,18 @@ package fzf
 
 import "sync"
 
-// Chunk is a list of Item pointers whose size has the upper limit of chunkSize
-type Chunk []*Item // >>> []Item
+// Chunk is a list of Items whose size has the upper limit of chunkSize
+type Chunk struct {
+	items [chunkSize]Item
+	count int
+}
 
-// ItemBuilder is a closure type that builds Item object from a pointer to a
-// string and an integer
-type ItemBuilder func([]byte, int) *Item
+// ItemBuilder is a closure type that builds Item object from byte array
+type ItemBuilder func(*Item, []byte) bool
 
 // ChunkList is a list of Chunks
 type ChunkList struct {
 	chunks []*Chunk
-	count  int
 	mutex  sync.Mutex
 	trans  ItemBuilder
 }
@@ -21,15 +22,13 @@ type ChunkList struct {
 func NewChunkList(trans ItemBuilder) *ChunkList {
 	return &ChunkList{
 		chunks: []*Chunk{},
-		count:  0,
 		mutex:  sync.Mutex{},
 		trans:  trans}
 }
 
-func (c *Chunk) push(trans ItemBuilder, data []byte, index int) bool {
-	item := trans(data, index)
-	if item != nil {
-		*c = append(*c, item)
+func (c *Chunk) push(trans ItemBuilder, data []byte) bool {
+	if trans(&c.items[c.count], data) {
+		c.count++
 		return true
 	}
 	return false
@@ -37,7 +36,7 @@ func (c *Chunk) push(trans ItemBuilder, data []byte, index int) bool {
 
 // IsFull returns true if the Chunk is full
 func (c *Chunk) IsFull() bool {
-	return len(*c) == chunkSize
+	return c.count == chunkSize
 }
 
 func (cl *ChunkList) lastChunk() *Chunk {
@@ -49,45 +48,42 @@ func CountItems(cs []*Chunk) int {
 	if len(cs) == 0 {
 		return 0
 	}
-	return chunkSize*(len(cs)-1) + len(*(cs[len(cs)-1]))
+	return chunkSize*(len(cs)-1) + cs[len(cs)-1].count
 }
 
 // Push adds the item to the list
 func (cl *ChunkList) Push(data []byte) bool {
 	cl.mutex.Lock()
-	defer cl.mutex.Unlock()
 
 	if len(cl.chunks) == 0 || cl.lastChunk().IsFull() {
-		newChunk := Chunk(make([]*Item, 0, chunkSize))
-		cl.chunks = append(cl.chunks, &newChunk)
+		cl.chunks = append(cl.chunks, &Chunk{})
 	}
 
-	if cl.lastChunk().push(cl.trans, data, cl.count) {
-		cl.count++
-		return true
-	}
-	return false
+	ret := cl.lastChunk().push(cl.trans, data)
+	cl.mutex.Unlock()
+	return ret
+}
+
+// Clear clears the data
+func (cl *ChunkList) Clear() {
+	cl.mutex.Lock()
+	cl.chunks = nil
+	cl.mutex.Unlock()
 }
 
 // Snapshot returns immutable snapshot of the ChunkList
 func (cl *ChunkList) Snapshot() ([]*Chunk, int) {
 	cl.mutex.Lock()
-	defer cl.mutex.Unlock()
 
 	ret := make([]*Chunk, len(cl.chunks))
 	copy(ret, cl.chunks)
 
 	// Duplicate the last chunk
 	if cnt := len(ret); cnt > 0 {
-		ret[cnt-1] = ret[cnt-1].dupe()
+		newChunk := *ret[cnt-1]
+		ret[cnt-1] = &newChunk
 	}
-	return ret, cl.count
-}
 
-func (c *Chunk) dupe() *Chunk {
-	newChunk := make(Chunk, len(*c))
-	for idx, ptr := range *c {
-		newChunk[idx] = ptr
-	}
-	return &newChunk
+	cl.mutex.Unlock()
+	return ret, CountItems(ret)
 }

src/chunklist_test.go

@@ -3,14 +3,17 @@ package fzf
 import (
 	"fmt"
 	"testing"
+
+	"github.com/junegunn/fzf/src/util"
 )
 
 func TestChunkList(t *testing.T) {
 	// FIXME global
-	sortCriteria = []criterion{byMatchLen, byLength}
+	sortCriteria = []criterion{byScore, byLength}
 
-	cl := NewChunkList(func(s []byte, i int) *Item {
-		return &Item{text: []rune(string(s)), rank: buildEmptyRank(int32(i * 2))}
+	cl := NewChunkList(func(item *Item, s []byte) bool {
+		item.text = util.ToChars(s)
+		return true
 	})
 
 	// Snapshot
@@ -36,14 +39,11 @@ func TestChunkList(t *testing.T) {
 
 	// Check the content of the ChunkList
 	chunk1 := snapshot[0]
-	if len(*chunk1) != 2 {
+	if chunk1.count != 2 {
 		t.Error("Snapshot should contain only two items")
 	}
-	last := func(arr [5]int32) int32 {
-		return arr[len(arr)-1]
-	}
-	if string((*chunk1)[0].text) != "hello" || last((*chunk1)[0].rank) != 0 ||
-		string((*chunk1)[1].text) != "world" || last((*chunk1)[1].rank) != 2 {
+	if chunk1.items[0].text.ToString() != "hello" ||
+		chunk1.items[1].text.ToString() != "world" {
 		t.Error("Invalid data")
 	}
 	if chunk1.IsFull() {
@@ -66,14 +66,14 @@ func TestChunkList(t *testing.T) {
 		!snapshot[1].IsFull() || snapshot[2].IsFull() || count != chunkSize*2+2 {
 		t.Error("Expected two full chunks and one more chunk")
 	}
-	if len(*snapshot[2]) != 2 {
+	if snapshot[2].count != 2 {
 		t.Error("Unexpected number of items")
 	}
 
 	cl.Push([]byte("hello"))
 	cl.Push([]byte("world"))
 
-	lastChunkCount := len(*snapshot[len(snapshot)-1])
+	lastChunkCount := snapshot[len(snapshot)-1].count
 	if lastChunkCount != 2 {
 		t.Error("Unexpected number of items:", lastChunkCount)
 	}

src/constants.go

@@ -1,33 +1,46 @@
 package fzf
 
 import (
+	"math"
+	"os"
 	"time"
 
 	"github.com/junegunn/fzf/src/util"
 )
 
 const (
-	// Current version
-	version = "0.13.2"
-
 	// Core
 	coordinatorDelayMax  time.Duration = 100 * time.Millisecond
 	coordinatorDelayStep time.Duration = 10 * time.Millisecond
 
 	// Reader
-	defaultCommand = `find . -path '*/\.*' -prune -o -type f -print -o -type l -print 2> /dev/null | sed s/^..//`
+	readerBufferSize       = 64 * 1024
+	readerPollIntervalMin  = 10 * time.Millisecond
+	readerPollIntervalStep = 5 * time.Millisecond
+	readerPollIntervalMax  = 50 * time.Millisecond
 
 	// Terminal
-	initialDelay    = 20 * time.Millisecond
-	initialDelayTac = 100 * time.Millisecond
-	spinnerDuration = 200 * time.Millisecond
+	initialDelay      = 20 * time.Millisecond
+	initialDelayTac   = 100 * time.Millisecond
+	spinnerDuration   = 100 * time.Millisecond
+	previewCancelWait = 500 * time.Millisecond
+	previewChunkDelay = 100 * time.Millisecond
+	previewDelayed    = 500 * time.Millisecond
+	maxPatternLength  = 300
+	maxMulti          = math.MaxInt32
 
 	// Matcher
-	progressMinDuration = 200 * time.Millisecond
+	numPartitionsMultiplier = 8
+	maxPartitions           = 32
+	progressMinDuration     = 200 * time.Millisecond
 
 	// Capacity of each chunk
 	chunkSize int = 100
 
+	// Pre-allocated memory slices to minimize GC
+	slab16Size int = 100 * 1024 // 200KB * 32 = 12.8MB
+	slab32Size int = 2048       // 8KB * 32 = 256KB
+
 	// Do not cache results of low selectivity queries
 	queryCacheMax int = chunkSize / 5
 
@@ -41,6 +54,16 @@ const (
 	defaultJumpLabels string = "asdfghjklqwertyuiopzxcvbnm1234567890ASDFGHJKLQWERTYUIOPZXCVBNM`~;:,<.>/?'\"!@#$%^&*()[{]}-_=+"
 )
 
+var defaultCommand string
+
+func init() {
+	if !util.IsWindows() {
+		defaultCommand = `set -o pipefail; command find -L . -mindepth 1 \( -path '*/.*' -o -fstype 'sysfs' -o -fstype 'devfs' -o -fstype 'devtmpfs' -o -fstype 'proc' \) -prune -o -type f -print -o -type l -print 2> /dev/null | cut -b3-`
+	} else if os.Getenv("TERM") == "cygwin" {
+		defaultCommand = `sh -c "command find -L . -mindepth 1 -path '*/.*' -prune -o -type f -print -o -type l -print 2> /dev/null | cut -b3-"`
+	}
+}
+
 // fzf events
 const (
 	EvtReadNew util.EventType = iota
@@ -49,10 +72,12 @@ const (
 	EvtSearchProgress
 	EvtSearchFin
 	EvtHeader
-	EvtClose
+	EvtReady
+	EvtQuit
 )
 
 const (
+	exitCancel    = -1
 	exitOk        = 0
 	exitNoMatch   = 1
 	exitError     = 2

src/core.go

@@ -1,43 +1,14 @@
-/*
-Package fzf implements fzf, a command-line fuzzy finder.
-
-The MIT License (MIT)
-
-Copyright (c) 2016 Junegunn Choi
-
-Permission is hereby granted, free of charge, to any person obtaining a copy
-of this software and associated documentation files (the "Software"), to deal
-in the Software without restriction, including without limitation the rights
-to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-copies of the Software, and to permit persons to whom the Software is
-furnished to do so, subject to the following conditions:
-
-The above copyright notice and this permission notice shall be included in
-all copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-THE SOFTWARE.
-*/
+// Package fzf implements fzf, a command-line fuzzy finder.
 package fzf
 
 import (
 	"fmt"
 	"os"
-	"runtime"
 	"time"
 
 	"github.com/junegunn/fzf/src/util"
 )
 
-func initProcs() {
-	runtime.GOMAXPROCS(runtime.NumCPU())
-}
-
 /*
 Reader   -> EvtReadFin
 Reader   -> EvtReadNew        -> Matcher  (restart)
@@ -48,14 +19,16 @@ Matcher  -> EvtHeader         -> Terminal (update header)
 */
 
 // Run starts fzf
-func Run(opts *Options) {
-	initProcs()
-
+func Run(opts *Options, version string, revision string) {
 	sort := opts.Sort > 0
 	sortCriteria = opts.Criteria
 
 	if opts.Version {
-		fmt.Println(version)
+		if len(revision) > 0 {
+			fmt.Printf("%s (%s)\n", version, revision)
+		} else {
+			fmt.Println(version)
+		}
 		os.Exit(exitOk)
 	}
 
@@ -63,118 +36,135 @@ func Run(opts *Options) {
 	eventBox := util.NewEventBox()
 
 	// ANSI code processor
-	ansiProcessor := func(data []byte) ([]rune, []ansiOffset) {
-		return util.BytesToRunes(data), nil
-	}
-	ansiProcessorRunes := func(data []rune) ([]rune, []ansiOffset) {
-		return data, nil
+	ansiProcessor := func(data []byte) (util.Chars, *[]ansiOffset) {
+		return util.ToChars(data), nil
 	}
+
+	var lineAnsiState, prevLineAnsiState *ansiState
 	if opts.Ansi {
-		if opts.Theme != nil {
-			var state *ansiState
-			ansiProcessor = func(data []byte) ([]rune, []ansiOffset) {
-				trimmed, offsets, newState := extractColor(string(data), state, nil)
-				state = newState
-				return []rune(trimmed), offsets
+		if opts.Theme.Colored {
+			ansiProcessor = func(data []byte) (util.Chars, *[]ansiOffset) {
+				prevLineAnsiState = lineAnsiState
+				trimmed, offsets, newState := extractColor(string(data), lineAnsiState, nil)
+				lineAnsiState = newState
+				return util.ToChars([]byte(trimmed)), offsets
 			}
 		} else {
 			// When color is disabled but ansi option is given,
 			// we simply strip out ANSI codes from the input
-			ansiProcessor = func(data []byte) ([]rune, []ansiOffset) {
+			ansiProcessor = func(data []byte) (util.Chars, *[]ansiOffset) {
 				trimmed, _, _ := extractColor(string(data), nil, nil)
-				return []rune(trimmed), nil
+				return util.ToChars([]byte(trimmed)), nil
 			}
 		}
-		ansiProcessorRunes = func(data []rune) ([]rune, []ansiOffset) {
-			return ansiProcessor([]byte(string(data)))
-		}
 	}
 
 	// Chunk list
 	var chunkList *ChunkList
+	var itemIndex int32
 	header := make([]string, 0, opts.HeaderLines)
 	if len(opts.WithNth) == 0 {
-		chunkList = NewChunkList(func(data []byte, index int) *Item {
+		chunkList = NewChunkList(func(item *Item, data []byte) bool {
 			if len(header) < opts.HeaderLines {
 				header = append(header, string(data))
 				eventBox.Set(EvtHeader, header)
-				return nil
+				return false
 			}
-			runes, colors := ansiProcessor(data)
-			return &Item{
-				text:   runes,
-				colors: colors,
-				rank:   buildEmptyRank(int32(index))}
+			item.text, item.colors = ansiProcessor(data)
+			item.text.Index = itemIndex
+			itemIndex++
+			return true
 		})
 	} else {
-		chunkList = NewChunkList(func(data []byte, index int) *Item {
-			runes := util.BytesToRunes(data)
-			tokens := Tokenize(runes, opts.Delimiter)
-			trans := Transform(tokens, opts.WithNth)
-			if len(header) < opts.HeaderLines {
-				header = append(header, string(joinTokens(trans)))
-				eventBox.Set(EvtHeader, header)
-				return nil
+		chunkList = NewChunkList(func(item *Item, data []byte) bool {
+			tokens := Tokenize(string(data), opts.Delimiter)
+			if opts.Ansi && opts.Theme.Colored && len(tokens) > 1 {
+				var ansiState *ansiState
+				if prevLineAnsiState != nil {
+					ansiStateDup := *prevLineAnsiState
+					ansiState = &ansiStateDup
+				}
+				for _, token := range tokens {
+					prevAnsiState := ansiState
+					_, _, ansiState = extractColor(token.text.ToString(), ansiState, nil)
+					if prevAnsiState != nil {
+						token.text.Prepend("\x1b[m" + prevAnsiState.ToString())
+					} else {
+						token.text.Prepend("\x1b[m")
+					}
+				}
 			}
-			item := Item{
-				text:     joinTokens(trans),
-				origText: &runes,
-				colors:   nil,
-				rank:     buildEmptyRank(int32(index))}
-
-			trimmed, colors := ansiProcessorRunes(item.text)
-			item.text = trimmed
-			item.colors = colors
-			return &item
+			trans := Transform(tokens, opts.WithNth)
+			transformed := joinTokens(trans)
+			if len(header) < opts.HeaderLines {
+				header = append(header, transformed)
+				eventBox.Set(EvtHeader, header)
+				return false
+			}
+			item.text, item.colors = ansiProcessor([]byte(transformed))
+			item.text.TrimTrailingWhitespaces()
+			item.text.Index = itemIndex
+			item.origText = &data
+			itemIndex++
+			return true
 		})
 	}
 
 	// Reader
 	streamingFilter := opts.Filter != nil && !sort && !opts.Tac && !opts.Sync
+	var reader *Reader
 	if !streamingFilter {
-		reader := Reader{func(data []byte) bool {
+		reader = NewReader(func(data []byte) bool {
 			return chunkList.Push(data)
-		}, eventBox, opts.ReadZero}
+		}, eventBox, opts.ReadZero, opts.Filter == nil)
 		go reader.ReadSource()
 	}
 
 	// Matcher
 	forward := true
-	for _, cri := range opts.Criteria[1:] {
-		if cri == byEnd {
+	withPos := false
+	for idx := len(opts.Criteria) - 1; idx > 0; idx-- {
+		switch opts.Criteria[idx] {
+		case byChunk:
+			withPos = true
+		case byEnd:
 			forward = false
-			break
-		}
-		if cri == byBegin {
-			break
+		case byBegin:
+			forward = true
 		}
 	}
 	patternBuilder := func(runes []rune) *Pattern {
 		return BuildPattern(
-			opts.Fuzzy, opts.Extended, opts.Case, forward,
-			opts.Nth, opts.Delimiter, runes)
+			opts.Fuzzy, opts.FuzzyAlgo, opts.Extended, opts.Case, opts.Normalize, forward, withPos,
+			opts.Filter == nil, opts.Nth, opts.Delimiter, runes)
 	}
-	matcher := NewMatcher(patternBuilder, sort, opts.Tac, eventBox)
+	inputRevision := 0
+	snapshotRevision := 0
+	matcher := NewMatcher(patternBuilder, sort, opts.Tac, eventBox, inputRevision)
 
 	// Filtering mode
 	if opts.Filter != nil {
 		if opts.PrintQuery {
-			fmt.Println(*opts.Filter)
+			opts.Printer(*opts.Filter)
 		}
 
 		pattern := patternBuilder([]rune(*opts.Filter))
+		matcher.sort = pattern.sortable
 
 		found := false
 		if streamingFilter {
-			reader := Reader{
+			slab := util.MakeSlab(slab16Size, slab32Size)
+			reader := NewReader(
 				func(runes []byte) bool {
-					item := chunkList.trans(runes, 0)
-					if item != nil && pattern.MatchItem(item) {
-						fmt.Println(string(item.text))
-						found = true
+					item := Item{}
+					if chunkList.trans(&item, runes) {
+						if result, _, _ := pattern.MatchItem(&item, false, slab); result != nil {
+							opts.Printer(item.text.ToString())
+							found = true
+						}
 					}
 					return false
-				}, eventBox, opts.ReadZero}
+				}, eventBox, opts.ReadZero, false)
 			reader.ReadSource()
 		} else {
 			eventBox.Unwatch(EvtReadNew)
@@ -185,7 +175,7 @@ func Run(opts *Options) {
 				chunks:  snapshot,
 				pattern: pattern})
 			for i := 0; i < merger.Length(); i++ {
-				fmt.Println(merger.Get(i).AsString(opts.Ansi))
+				opts.Printer(merger.Get(i).item.AsString(opts.Ansi))
 				found = true
 			}
 		}
@@ -206,37 +196,133 @@ func Run(opts *Options) {
 
 	// Terminal I/O
 	terminal := NewTerminal(opts, eventBox)
+	maxFit := 0 // Maximum number of items that can fit on screen
+	padHeight := 0
+	heightUnknown := opts.Height.auto
+	if heightUnknown {
+		maxFit, padHeight = terminal.MaxFitAndPad()
+	}
 	deferred := opts.Select1 || opts.Exit0
 	go terminal.Loop()
-	if !deferred {
-		terminal.startChan <- true
+	if !deferred && !heightUnknown {
+		// Start right away
+		terminal.startChan <- fitpad{-1, -1}
 	}
 
 	// Event coordination
 	reading := true
 	ticks := 0
+	var nextCommand *string
 	eventBox.Watch(EvtReadNew)
+	total := 0
+	query := []rune{}
+	determine := func(final bool) {
+		if heightUnknown {
+			if total >= maxFit || final {
+				deferred = false
+				heightUnknown = false
+				terminal.startChan <- fitpad{util.Min(total, maxFit), padHeight}
+			}
+		} else if deferred {
+			deferred = false
+			terminal.startChan <- fitpad{-1, -1}
+		}
+	}
+
+	useSnapshot := false
+	var snapshot []*Chunk
+	var count int
+	restart := func(command string) {
+		reading = true
+		chunkList.Clear()
+		itemIndex = 0
+		inputRevision++
+		header = make([]string, 0, opts.HeaderLines)
+		go reader.restart(command)
+	}
 	for {
 		delay := true
 		ticks++
+		input := func() []rune {
+			reloaded := snapshotRevision != inputRevision
+			paused, input := terminal.Input()
+			if reloaded && paused {
+				query = []rune{}
+			} else if !paused {
+				query = input
+			}
+			return query
+		}
 		eventBox.Wait(func(events *util.Events) {
-			defer events.Clear()
+			if _, fin := (*events)[EvtReadFin]; fin {
+				delete(*events, EvtReadNew)
+			}
 			for evt, value := range *events {
 				switch evt {
-
+				case EvtQuit:
+					if reading {
+						reader.terminate()
+					}
+					os.Exit(value.(int))
 				case EvtReadNew, EvtReadFin:
-					reading = reading && evt == EvtReadNew
-					snapshot, count := chunkList.Snapshot()
-					terminal.UpdateCount(count, !reading)
-					matcher.Reset(snapshot, terminal.Input(), false, !reading, sort)
+					if evt == EvtReadFin && nextCommand != nil {
+						restart(*nextCommand)
+						nextCommand = nil
+						break
+					} else {
+						reading = reading && evt == EvtReadNew
+					}
+					if useSnapshot && evt == EvtReadFin {
+						useSnapshot = false
+					}
+					if !useSnapshot {
+						snapshot, count = chunkList.Snapshot()
+						snapshotRevision = inputRevision
+					}
+					total = count
+					terminal.UpdateCount(total, !reading, value.(*string))
+					if opts.Sync {
+						opts.Sync = false
+						terminal.UpdateList(PassMerger(&snapshot, opts.Tac, snapshotRevision))
+					}
+					if heightUnknown && !deferred {
+						determine(!reading)
+					}
+					matcher.Reset(snapshot, input(), false, !reading, sort, snapshotRevision)
 
 				case EvtSearchNew:
+					var command *string
+					var changed bool
 					switch val := value.(type) {
-					case bool:
-						sort = val
+					case searchRequest:
+						sort = val.sort
+						command = val.command
+						changed = val.changed
+						if command != nil {
+							useSnapshot = val.sync
+						}
 					}
-					snapshot, _ := chunkList.Snapshot()
-					matcher.Reset(snapshot, terminal.Input(), true, !reading, sort)
+					if command != nil {
+						if reading {
+							reader.terminate()
+							nextCommand = command
+						} else {
+							restart(*command)
+						}
+					}
+					if !changed {
+						break
+					}
+					if !useSnapshot {
+						newSnapshot, _ := chunkList.Snapshot()
+						// We want to avoid showing empty list when reload is triggered
+						// and the query string is changed at the same time i.e. command != nil && changed
+						if command == nil || len(newSnapshot) > 0 {
+							snapshot = newSnapshot
+							snapshotRevision = inputRevision
+						}
+					}
+					matcher.Reset(snapshot, input(), true, !reading, sort, snapshotRevision)
 					delay = false
 
 				case EvtSearchProgress:
@@ -246,7 +332,9 @@ func Run(opts *Options) {
 					}
 
 				case EvtHeader:
-					terminal.UpdateHeader(value.([]string))
+					headerPadded := make([]string, opts.HeaderLines)
+					copy(headerPadded, value.([]string))
+					terminal.UpdateHeader(headerPadded)
 
 				case EvtSearchFin:
 					switch val := value.(type) {
@@ -254,32 +342,31 @@ func Run(opts *Options) {
 						if deferred {
 							count := val.Length()
 							if opts.Select1 && count > 1 || opts.Exit0 && !opts.Select1 && count > 0 {
-								deferred = false
-								terminal.startChan <- true
+								determine(val.final)
 							} else if val.final {
 								if opts.Exit0 && count == 0 || opts.Select1 && count == 1 {
 									if opts.PrintQuery {
-										fmt.Println(opts.Query)
+										opts.Printer(opts.Query)
 									}
 									if len(opts.Expect) > 0 {
-										fmt.Println()
+										opts.Printer("")
 									}
 									for i := 0; i < count; i++ {
-										fmt.Println(val.Get(i).AsString(opts.Ansi))
+										opts.Printer(val.Get(i).item.AsString(opts.Ansi))
 									}
 									if count > 0 {
 										os.Exit(exitOk)
 									}
 									os.Exit(exitNoMatch)
 								}
-								deferred = false
-								terminal.startChan <- true
+								determine(val.final)
 							}
 						}
 						terminal.UpdateList(val)
 					}
 				}
 			}
+			events.Clear()
 		})
 		if delay && reading {
 			dur := util.DurWithin(

src/curses/curses.go

@@ -1,704 +0,0 @@
-package curses
-
-/*
-#include <ncurses.h>
-#include <locale.h>
-#cgo !static LDFLAGS: -lncurses
-#cgo static LDFLAGS: -l:libncursesw.a -l:libtinfo.a -l:libgpm.a -ldl
-#cgo android static LDFLAGS: -l:libncurses.a -fPIE -march=armv7-a -mfpu=neon -mhard-float -Wl,--no-warn-mismatch
-
-SCREEN *c_newterm () {
-	return newterm(NULL, stderr, stdin);
-}
-
-*/
-import "C"
-
-import (
-	"fmt"
-	"os"
-	"strings"
-	"syscall"
-	"time"
-	"unicode/utf8"
-)
-
-// Types of user action
-const (
-	Rune = iota
-
-	CtrlA
-	CtrlB
-	CtrlC
-	CtrlD
-	CtrlE
-	CtrlF
-	CtrlG
-	CtrlH
-	Tab
-	CtrlJ
-	CtrlK
-	CtrlL
-	CtrlM
-	CtrlN
-	CtrlO
-	CtrlP
-	CtrlQ
-	CtrlR
-	CtrlS
-	CtrlT
-	CtrlU
-	CtrlV
-	CtrlW
-	CtrlX
-	CtrlY
-	CtrlZ
-	ESC
-
-	Invalid
-	Mouse
-	DoubleClick
-
-	BTab
-	BSpace
-
-	Del
-	PgUp
-	PgDn
-
-	Up
-	Down
-	Left
-	Right
-	Home
-	End
-
-	SLeft
-	SRight
-
-	F1
-	F2
-	F3
-	F4
-	F5
-	F6
-	F7
-	F8
-	F9
-	F10
-
-	AltEnter
-	AltSpace
-	AltSlash
-	AltBS
-	AltA
-	AltB
-	AltC
-	AltD
-	AltE
-	AltF
-
-	AltZ = AltA + 'z' - 'a'
-)
-
-// Pallete
-const (
-	ColNormal = iota
-	ColPrompt
-	ColMatch
-	ColCurrent
-	ColCurrentMatch
-	ColSpinner
-	ColInfo
-	ColCursor
-	ColSelected
-	ColHeader
-	ColBorder
-	ColUser // Should be the last entry
-)
-
-const (
-	doubleClickDuration = 500 * time.Millisecond
-	colDefault          = -1
-	colUndefined        = -2
-)
-
-type ColorTheme struct {
-	UseDefault   bool
-	Fg           int16
-	Bg           int16
-	DarkBg       int16
-	Prompt       int16
-	Match        int16
-	Current      int16
-	CurrentMatch int16
-	Spinner      int16
-	Info         int16
-	Cursor       int16
-	Selected     int16
-	Header       int16
-	Border       int16
-}
-
-type Event struct {
-	Type       int
-	Char       rune
-	MouseEvent *MouseEvent
-}
-
-type MouseEvent struct {
-	Y      int
-	X      int
-	S      int
-	Down   bool
-	Double bool
-	Mod    bool
-}
-
-var (
-	_buf          []byte
-	_in           *os.File
-	_color        func(int, bool) C.int
-	_colorMap     map[int]int
-	_prevDownTime time.Time
-	_clickY       []int
-	_screen       *C.SCREEN
-	Default16     *ColorTheme
-	Dark256       *ColorTheme
-	Light256      *ColorTheme
-	FG            int
-	CurrentFG     int
-	BG            int
-	DarkBG        int
-)
-
-type Window struct {
-	win    *C.WINDOW
-	Top    int
-	Left   int
-	Width  int
-	Height int
-}
-
-func NewWindow(top int, left int, width int, height int, border bool) *Window {
-	win := C.newwin(C.int(height), C.int(width), C.int(top), C.int(left))
-	if border {
-		attr := _color(ColBorder, false)
-		C.wattron(win, attr)
-		C.box(win, 0, 0)
-		C.wattroff(win, attr)
-	}
-	return &Window{
-		win:    win,
-		Top:    top,
-		Left:   left,
-		Width:  width,
-		Height: height,
-	}
-}
-
-func EmptyTheme() *ColorTheme {
-	return &ColorTheme{
-		UseDefault:   true,
-		Fg:           colUndefined,
-		Bg:           colUndefined,
-		DarkBg:       colUndefined,
-		Prompt:       colUndefined,
-		Match:        colUndefined,
-		Current:      colUndefined,
-		CurrentMatch: colUndefined,
-		Spinner:      colUndefined,
-		Info:         colUndefined,
-		Cursor:       colUndefined,
-		Selected:     colUndefined,
-		Header:       colUndefined,
-		Border:       colUndefined}
-}
-
-func init() {
-	_prevDownTime = time.Unix(0, 0)
-	_clickY = []int{}
-	_colorMap = make(map[int]int)
-	Default16 = &ColorTheme{
-		UseDefault:   true,
-		Fg:           15,
-		Bg:           0,
-		DarkBg:       C.COLOR_BLACK,
-		Prompt:       C.COLOR_BLUE,
-		Match:        C.COLOR_GREEN,
-		Current:      C.COLOR_YELLOW,
-		CurrentMatch: C.COLOR_GREEN,
-		Spinner:      C.COLOR_GREEN,
-		Info:         C.COLOR_WHITE,
-		Cursor:       C.COLOR_RED,
-		Selected:     C.COLOR_MAGENTA,
-		Header:       C.COLOR_CYAN,
-		Border:       C.COLOR_BLACK}
-	Dark256 = &ColorTheme{
-		UseDefault:   true,
-		Fg:           15,
-		Bg:           0,
-		DarkBg:       236,
-		Prompt:       110,
-		Match:        108,
-		Current:      254,
-		CurrentMatch: 151,
-		Spinner:      148,
-		Info:         144,
-		Cursor:       161,
-		Selected:     168,
-		Header:       109,
-		Border:       59}
-	Light256 = &ColorTheme{
-		UseDefault:   true,
-		Fg:           15,
-		Bg:           0,
-		DarkBg:       251,
-		Prompt:       25,
-		Match:        66,
-		Current:      237,
-		CurrentMatch: 23,
-		Spinner:      65,
-		Info:         101,
-		Cursor:       161,
-		Selected:     168,
-		Header:       31,
-		Border:       145}
-}
-
-func attrColored(pair int, bold bool) C.int {
-	var attr C.int
-	if pair > ColNormal {
-		attr = C.COLOR_PAIR(C.int(pair))
-	}
-	if bold {
-		attr = attr | C.A_BOLD
-	}
-	return attr
-}
-
-func attrMono(pair int, bold bool) C.int {
-	var attr C.int
-	switch pair {
-	case ColCurrent:
-		if bold {
-			attr = C.A_REVERSE
-		}
-	case ColMatch:
-		attr = C.A_UNDERLINE
-	case ColCurrentMatch:
-		attr = C.A_UNDERLINE | C.A_REVERSE
-	}
-	if bold {
-		attr = attr | C.A_BOLD
-	}
-	return attr
-}
-
-func MaxX() int {
-	return int(C.COLS)
-}
-
-func MaxY() int {
-	return int(C.LINES)
-}
-
-func getch(nonblock bool) int {
-	b := make([]byte, 1)
-	syscall.SetNonblock(int(_in.Fd()), nonblock)
-	_, err := _in.Read(b)
-	if err != nil {
-		return -1
-	}
-	return int(b[0])
-}
-
-func Init(theme *ColorTheme, black bool, mouse bool) {
-	{
-		in, err := os.OpenFile("/dev/tty", syscall.O_RDONLY, 0)
-		if err != nil {
-			panic("Failed to open /dev/tty")
-		}
-		_in = in
-		// Break STDIN
-		// syscall.Dup2(int(in.Fd()), int(os.Stdin.Fd()))
-	}
-
-	C.setlocale(C.LC_ALL, C.CString(""))
-	_screen = C.c_newterm()
-	if _screen == nil {
-		fmt.Println("Invalid $TERM: " + os.Getenv("TERM"))
-		os.Exit(2)
-	}
-	C.set_term(_screen)
-	if mouse {
-		C.mousemask(C.ALL_MOUSE_EVENTS, nil)
-	}
-	C.noecho()
-	C.raw() // stty dsusp undef
-
-	if theme != nil {
-		C.start_color()
-		var baseTheme *ColorTheme
-		if C.tigetnum(C.CString("colors")) >= 256 {
-			baseTheme = Dark256
-		} else {
-			baseTheme = Default16
-		}
-		initPairs(baseTheme, theme, black)
-		_color = attrColored
-	} else {
-		_color = attrMono
-	}
-}
-
-func override(a int16, b int16) C.short {
-	if b == colUndefined {
-		return C.short(a)
-	}
-	return C.short(b)
-}
-
-func initPairs(baseTheme *ColorTheme, theme *ColorTheme, black bool) {
-	fg := override(baseTheme.Fg, theme.Fg)
-	bg := override(baseTheme.Bg, theme.Bg)
-	if black {
-		bg = C.COLOR_BLACK
-	} else if theme.UseDefault {
-		fg = colDefault
-		bg = colDefault
-		C.use_default_colors()
-	}
-	if theme.UseDefault {
-		FG = colDefault
-		BG = colDefault
-	} else {
-		FG = int(fg)
-		BG = int(bg)
-		C.assume_default_colors(C.int(override(baseTheme.Fg, theme.Fg)), C.int(bg))
-	}
-
-	currentFG := override(baseTheme.Current, theme.Current)
-	darkBG := override(baseTheme.DarkBg, theme.DarkBg)
-	CurrentFG = int(currentFG)
-	DarkBG = int(darkBG)
-	C.init_pair(ColPrompt, override(baseTheme.Prompt, theme.Prompt), bg)
-	C.init_pair(ColMatch, override(baseTheme.Match, theme.Match), bg)
-	C.init_pair(ColCurrent, currentFG, darkBG)
-	C.init_pair(ColCurrentMatch, override(baseTheme.CurrentMatch, theme.CurrentMatch), darkBG)
-	C.init_pair(ColSpinner, override(baseTheme.Spinner, theme.Spinner), bg)
-	C.init_pair(ColInfo, override(baseTheme.Info, theme.Info), bg)
-	C.init_pair(ColCursor, override(baseTheme.Cursor, theme.Cursor), darkBG)
-	C.init_pair(ColSelected, override(baseTheme.Selected, theme.Selected), darkBG)
-	C.init_pair(ColHeader, override(baseTheme.Header, theme.Header), bg)
-	C.init_pair(ColBorder, override(baseTheme.Border, theme.Border), bg)
-}
-
-func Close() {
-	C.endwin()
-	C.delscreen(_screen)
-}
-
-func GetBytes() []byte {
-	c := getch(false)
-	_buf = append(_buf, byte(c))
-
-	for {
-		c = getch(true)
-		if c == -1 {
-			break
-		}
-		_buf = append(_buf, byte(c))
-	}
-
-	return _buf
-}
-
-// 27 (91 79) 77 type x y
-func mouseSequence(sz *int) Event {
-	if len(_buf) < 6 {
-		return Event{Invalid, 0, nil}
-	}
-	*sz = 6
-	switch _buf[3] {
-	case 32, 36, 40, 48, // mouse-down / shift / cmd / ctrl
-		35, 39, 43, 51: // mouse-up / shift / cmd / ctrl
-		mod := _buf[3] >= 36
-		down := _buf[3]%2 == 0
-		x := int(_buf[4] - 33)
-		y := int(_buf[5] - 33)
-		double := false
-		if down {
-			now := time.Now()
-			if now.Sub(_prevDownTime) < doubleClickDuration {
-				_clickY = append(_clickY, y)
-			} else {
-				_clickY = []int{y}
-			}
-			_prevDownTime = now
-		} else {
-			if len(_clickY) > 1 && _clickY[0] == _clickY[1] &&
-				time.Now().Sub(_prevDownTime) < doubleClickDuration {
-				double = true
-			}
-		}
-		return Event{Mouse, 0, &MouseEvent{y, x, 0, down, double, mod}}
-	case 96, 100, 104, 112, // scroll-up / shift / cmd / ctrl
-		97, 101, 105, 113: // scroll-down / shift / cmd / ctrl
-		mod := _buf[3] >= 100
-		s := 1 - int(_buf[3]%2)*2
-		x := int(_buf[4] - 33)
-		y := int(_buf[5] - 33)
-		return Event{Mouse, 0, &MouseEvent{y, x, s, false, false, mod}}
-	}
-	return Event{Invalid, 0, nil}
-}
-
-func escSequence(sz *int) Event {
-	if len(_buf) < 2 {
-		return Event{ESC, 0, nil}
-	}
-	*sz = 2
-	switch _buf[1] {
-	case 13:
-		return Event{AltEnter, 0, nil}
-	case 32:
-		return Event{AltSpace, 0, nil}
-	case 47:
-		return Event{AltSlash, 0, nil}
-	case 98:
-		return Event{AltB, 0, nil}
-	case 100:
-		return Event{AltD, 0, nil}
-	case 102:
-		return Event{AltF, 0, nil}
-	case 127:
-		return Event{AltBS, 0, nil}
-	case 91, 79:
-		if len(_buf) < 3 {
-			return Event{Invalid, 0, nil}
-		}
-		*sz = 3
-		switch _buf[2] {
-		case 68:
-			return Event{Left, 0, nil}
-		case 67:
-			return Event{Right, 0, nil}
-		case 66:
-			return Event{Down, 0, nil}
-		case 65:
-			return Event{Up, 0, nil}
-		case 90:
-			return Event{BTab, 0, nil}
-		case 72:
-			return Event{Home, 0, nil}
-		case 70:
-			return Event{End, 0, nil}
-		case 77:
-			return mouseSequence(sz)
-		case 80:
-			return Event{F1, 0, nil}
-		case 81:
-			return Event{F2, 0, nil}
-		case 82:
-			return Event{F3, 0, nil}
-		case 83:
-			return Event{F4, 0, nil}
-		case 49, 50, 51, 52, 53, 54:
-			if len(_buf) < 4 {
-				return Event{Invalid, 0, nil}
-			}
-			*sz = 4
-			switch _buf[2] {
-			case 50:
-				if len(_buf) == 5 && _buf[4] == 126 {
-					*sz = 5
-					switch _buf[3] {
-					case 48:
-						return Event{F9, 0, nil}
-					case 49:
-						return Event{F10, 0, nil}
-					}
-				}
-				// Bracketed paste mode \e[200~ / \e[201
-				if _buf[3] == 48 && (_buf[4] == 48 || _buf[4] == 49) && _buf[5] == 126 {
-					*sz = 6
-					return Event{Invalid, 0, nil}
-				}
-				return Event{Invalid, 0, nil} // INS
-			case 51:
-				return Event{Del, 0, nil}
-			case 52:
-				return Event{End, 0, nil}
-			case 53:
-				return Event{PgUp, 0, nil}
-			case 54:
-				return Event{PgDn, 0, nil}
-			case 49:
-				switch _buf[3] {
-				case 126:
-					return Event{Home, 0, nil}
-				case 53, 55, 56, 57:
-					if len(_buf) == 5 && _buf[4] == 126 {
-						*sz = 5
-						switch _buf[3] {
-						case 53:
-							return Event{F5, 0, nil}
-						case 55:
-							return Event{F6, 0, nil}
-						case 56:
-							return Event{F7, 0, nil}
-						case 57:
-							return Event{F8, 0, nil}
-						}
-					}
-					return Event{Invalid, 0, nil}
-				case 59:
-					if len(_buf) != 6 {
-						return Event{Invalid, 0, nil}
-					}
-					*sz = 6
-					switch _buf[4] {
-					case 50:
-						switch _buf[5] {
-						case 68:
-							return Event{Home, 0, nil}
-						case 67:
-							return Event{End, 0, nil}
-						}
-					case 53:
-						switch _buf[5] {
-						case 68:
-							return Event{SLeft, 0, nil}
-						case 67:
-							return Event{SRight, 0, nil}
-						}
-					} // _buf[4]
-				} // _buf[3]
-			} // _buf[2]
-		} // _buf[2]
-	} // _buf[1]
-	if _buf[1] >= 'a' && _buf[1] <= 'z' {
-		return Event{AltA + int(_buf[1]) - 'a', 0, nil}
-	}
-	return Event{Invalid, 0, nil}
-}
-
-func GetChar() Event {
-	if len(_buf) == 0 {
-		_buf = GetBytes()
-	}
-	if len(_buf) == 0 {
-		panic("Empty _buffer")
-	}
-
-	sz := 1
-	defer func() {
-		_buf = _buf[sz:]
-	}()
-
-	switch _buf[0] {
-	case CtrlC:
-		return Event{CtrlC, 0, nil}
-	case CtrlG:
-		return Event{CtrlG, 0, nil}
-	case CtrlQ:
-		return Event{CtrlQ, 0, nil}
-	case 127:
-		return Event{BSpace, 0, nil}
-	case ESC:
-		return escSequence(&sz)
-	}
-
-	// CTRL-A ~ CTRL-Z
-	if _buf[0] <= CtrlZ {
-		return Event{int(_buf[0]), 0, nil}
-	}
-	r, rsz := utf8.DecodeRune(_buf)
-	if r == utf8.RuneError {
-		return Event{ESC, 0, nil}
-	}
-	sz = rsz
-	return Event{Rune, r, nil}
-}
-
-func (w *Window) Close() {
-	C.delwin(w.win)
-}
-
-func (w *Window) Enclose(y int, x int) bool {
-	return bool(C.wenclose(w.win, C.int(y), C.int(x)))
-}
-
-func (w *Window) Move(y int, x int) {
-	C.wmove(w.win, C.int(y), C.int(x))
-}
-
-func (w *Window) MoveAndClear(y int, x int) {
-	w.Move(y, x)
-	C.wclrtoeol(w.win)
-}
-
-func (w *Window) Print(text string) {
-	C.waddstr(w.win, C.CString(strings.Map(func(r rune) rune {
-		if r < 32 {
-			return -1
-		}
-		return r
-	}, text)))
-}
-
-func (w *Window) CPrint(pair int, bold bool, text string) {
-	attr := _color(pair, bold)
-	C.wattron(w.win, attr)
-	w.Print(text)
-	C.wattroff(w.win, attr)
-}
-
-func Clear() {
-	C.clear()
-}
-
-func Endwin() {
-	C.endwin()
-}
-
-func Refresh() {
-	C.refresh()
-}
-
-func (w *Window) Erase() {
-	C.werase(w.win)
-}
-
-func (w *Window) Fill(str string) bool {
-	return C.waddstr(w.win, C.CString(str)) == C.OK
-}
-
-func (w *Window) CFill(str string, fg int, bg int, bold bool) bool {
-	attr := _color(PairFor(fg, bg), bold)
-	C.wattron(w.win, attr)
-	ret := w.Fill(str)
-	C.wattroff(w.win, attr)
-	return ret
-}
-
-func (w *Window) Refresh() {
-	C.wnoutrefresh(w.win)
-}
-
-func DoUpdate() {
-	C.doupdate()
-}
-
-func PairFor(fg int, bg int) int {
-	key := (fg << 8) + bg
-	if found, prs := _colorMap[key]; prs {
-		return found
-	}
-
-	id := len(_colorMap) + ColUser
-	C.init_pair(C.short(id), C.short(fg), C.short(bg))
-	_colorMap[key] = id
-	return id
-}

src/curses/curses_test.go

@@ -1,14 +0,0 @@
-package curses
-
-import (
-	"testing"
-)
-
-func TestPairFor(t *testing.T) {
-	if PairFor(30, 50) != PairFor(30, 50) {
-		t.Fail()
-	}
-	if PairFor(-1, 10) != PairFor(-1, 10) {
-		t.Fail()
-	}
-}

src/fzf/main.go

@@ -1,7 +0,0 @@
-package main
-
-import "github.com/junegunn/fzf/src"
-
-func main() {
-	fzf.Run(fzf.ParseOptions())
-}

src/history.go

@@ -2,7 +2,6 @@ package fzf
 
 import (
 	"errors"
-	"io/ioutil"
 	"os"
 	"strings"
 )
@@ -26,12 +25,12 @@ func NewHistory(path string, maxSize int) (*History, error) {
 	}
 
 	// Read history file
-	data, err := ioutil.ReadFile(path)
+	data, err := os.ReadFile(path)
 	if err != nil {
 		// If it doesn't exist, check if we can create a file with the name
 		if os.IsNotExist(err) {
 			data = []byte{}
-			if err := ioutil.WriteFile(path, data, 0600); err != nil {
+			if err := os.WriteFile(path, data, 0600); err != nil {
 				return nil, fmtError(err)
 			}
 		} else {
@@ -59,14 +58,14 @@ func (h *History) append(line string) error {
 
 	lines := append(h.lines[:len(h.lines)-1], line)
 	if len(lines) > h.maxSize {
-		lines = lines[len(lines)-h.maxSize : len(lines)]
+		lines = lines[len(lines)-h.maxSize:]
 	}
 	h.lines = append(lines, "")
-	return ioutil.WriteFile(h.path, []byte(strings.Join(h.lines, "\n")), 0600)
+	return os.WriteFile(h.path, []byte(strings.Join(h.lines, "\n")), 0600)
 }
 
 func (h *History) override(str string) {
-	// You can update the history but they're not written to the file
+	// You can update the history, but they're not written to the file
 	if h.cursor == len(h.lines)-1 {
 		h.lines[h.cursor] = str
 	} else if h.cursor < len(h.lines)-1 {

src/history_test.go

@@ -1,7 +1,8 @@
 package fzf
 
 import (
-	"os/user"
+	"os"
+	"runtime"
 	"testing"
 )
 
@@ -9,24 +10,31 @@ func TestHistory(t *testing.T) {
 	maxHistory := 50
 
 	// Invalid arguments
-	user, _ := user.Current()
-	paths := []string{"/etc", "/proc"}
-	if user.Name != "root" {
-		paths = append(paths, "/etc/sudoers")
+	var paths []string
+	if runtime.GOOS == "windows" {
+		// GOPATH should exist, so we shouldn't be able to override it
+		paths = []string{os.Getenv("GOPATH")}
+	} else {
+		paths = []string{"/etc", "/proc"}
 	}
+
 	for _, path := range paths {
 		if _, e := NewHistory(path, maxHistory); e == nil {
 			t.Error("Error expected for: " + path)
 		}
 	}
+
+	f, _ := os.CreateTemp("", "fzf-history")
+	f.Close()
+
 	{ // Append lines
-		h, _ := NewHistory("/tmp/fzf-history", maxHistory)
+		h, _ := NewHistory(f.Name(), maxHistory)
 		for i := 0; i < maxHistory+10; i++ {
 			h.append("foobar")
 		}
 	}
 	{ // Read lines
-		h, _ := NewHistory("/tmp/fzf-history", maxHistory)
+		h, _ := NewHistory(f.Name(), maxHistory)
 		if len(h.lines) != maxHistory+1 {
 			t.Errorf("Expected: %d, actual: %d\n", maxHistory+1, len(h.lines))
 		}
@@ -37,13 +45,13 @@ func TestHistory(t *testing.T) {
 		}
 	}
 	{ // Append lines
-		h, _ := NewHistory("/tmp/fzf-history", maxHistory)
+		h, _ := NewHistory(f.Name(), maxHistory)
 		h.append("barfoo")
 		h.append("")
 		h.append("foobarbaz")
 	}
 	{ // Read lines again
-		h, _ := NewHistory("/tmp/fzf-history", maxHistory)
+		h, _ := NewHistory(f.Name(), maxHistory)
 		if len(h.lines) != maxHistory+1 {
 			t.Errorf("Expected: %d, actual: %d\n", maxHistory+1, len(h.lines))
 		}

src/item.go

@@ -1,291 +1,44 @@
 package fzf
 
 import (
-	"math"
-
-	"github.com/junegunn/fzf/src/curses"
+	"github.com/junegunn/fzf/src/util"
 )
 
-// Offset holds three 32-bit integers denoting the offsets of a matched substring
-type Offset [3]int32
-
-type colorOffset struct {
-	offset [2]int32
-	color  int
-	bold   bool
-}
-
-// Item represents each input line
+// Item represents each input line. 56 bytes.
 type Item struct {
-	text        []rune
-	origText    *[]rune
-	transformed []Token
-	offsets     []Offset
-	colors      []ansiOffset
-	rank        [5]int32
-	bonus       int32
-}
-
-// Sort criteria to use. Never changes once fzf is started.
-var sortCriteria []criterion
-
-func isRankValid(rank [5]int32) bool {
-	// Exclude ordinal index
-	for _, r := range rank[:4] {
-		if r > 0 {
-			return true
-		}
-	}
-	return false
-}
-
-func buildEmptyRank(index int32) [5]int32 {
-	return [5]int32{0, 0, 0, 0, index}
+	text        util.Chars    // 32 = 24 + 1 + 1 + 2 + 4
+	transformed *[]Token      // 8
+	origText    *[]byte       // 8
+	colors      *[]ansiOffset // 8
 }
 
+// Index returns ordinal index of the Item
 func (item *Item) Index() int32 {
-	return item.rank[4]
+	return item.text.Index
 }
 
-// Rank calculates rank of the Item
-func (item *Item) Rank(cache bool) [5]int32 {
-	if cache && isRankValid(item.rank) {
-		return item.rank
+var minItem = Item{text: util.Chars{Index: -1}}
+
+func (item *Item) TrimLength() uint16 {
+	return item.text.TrimLength()
+}
+
+// Colors returns ansiOffsets of the Item
+func (item *Item) Colors() []ansiOffset {
+	if item.colors == nil {
+		return []ansiOffset{}
 	}
-	matchlen := 0
-	prevEnd := 0
-	lenSum := 0
-	minBegin := math.MaxInt32
-	for _, offset := range item.offsets {
-		begin := int(offset[0])
-		end := int(offset[1])
-		trimLen := int(offset[2])
-		lenSum += trimLen
-		if prevEnd > begin {
-			begin = prevEnd
-		}
-		if end > prevEnd {
-			prevEnd = end
-		}
-		if end > begin {
-			if begin < minBegin {
-				minBegin = begin
-			}
-			matchlen += end - begin
-		}
-	}
-	rank := buildEmptyRank(item.Index())
-	for idx, criterion := range sortCriteria {
-		var val int32
-		switch criterion {
-		case byMatchLen:
-			if matchlen == 0 {
-				val = math.MaxInt32
-			} else {
-				// It is extremely unlikely that bonus exceeds 128
-				val = 128*int32(matchlen) - item.bonus
-			}
-		case byLength:
-			// It is guaranteed that .transformed in not null in normal execution
-			if item.transformed != nil {
-				// If offsets is empty, lenSum will be 0, but we don't care
-				val = int32(lenSum)
-			} else {
-				val = int32(len(item.text))
-			}
-		case byBegin:
-			// We can't just look at item.offsets[0][0] because it can be an inverse term
-			whitePrefixLen := 0
-			for idx, r := range item.text {
-				whitePrefixLen = idx
-				if idx == minBegin || r != ' ' && r != '\t' {
-					break
-				}
-			}
-			val = int32(minBegin - whitePrefixLen)
-		case byEnd:
-			if prevEnd > 0 {
-				val = int32(1 + len(item.text) - prevEnd)
-			} else {
-				// Empty offsets due to inverse terms.
-				val = 1
-			}
-		}
-		rank[idx] = val
-	}
-	if cache {
-		item.rank = rank
-	}
-	return rank
+	return *item.colors
 }
 
 // AsString returns the original string
 func (item *Item) AsString(stripAnsi bool) string {
-	return *item.StringPtr(stripAnsi)
-}
-
-// StringPtr returns the pointer to the original string
-func (item *Item) StringPtr(stripAnsi bool) *string {
 	if item.origText != nil {
 		if stripAnsi {
 			trimmed, _, _ := extractColor(string(*item.origText), nil, nil)
-			return &trimmed
+			return trimmed
 		}
-		orig := string(*item.origText)
-		return &orig
+		return string(*item.origText)
 	}
-	str := string(item.text)
-	return &str
-}
-
-func (item *Item) colorOffsets(color int, bold bool, current bool) []colorOffset {
-	if len(item.colors) == 0 {
-		var offsets []colorOffset
-		for _, off := range item.offsets {
-
-			offsets = append(offsets, colorOffset{offset: [2]int32{off[0], off[1]}, color: color, bold: bold})
-		}
-		return offsets
-	}
-
-	// Find max column
-	var maxCol int32
-	for _, off := range item.offsets {
-		if off[1] > maxCol {
-			maxCol = off[1]
-		}
-	}
-	for _, ansi := range item.colors {
-		if ansi.offset[1] > maxCol {
-			maxCol = ansi.offset[1]
-		}
-	}
-	cols := make([]int, maxCol)
-
-	for colorIndex, ansi := range item.colors {
-		for i := ansi.offset[0]; i < ansi.offset[1]; i++ {
-			cols[i] = colorIndex + 1 // XXX
-		}
-	}
-
-	for _, off := range item.offsets {
-		for i := off[0]; i < off[1]; i++ {
-			cols[i] = -1
-		}
-	}
-
-	// sort.Sort(ByOrder(offsets))
-
-	// Merge offsets
-	// ------------  ----  --  ----
-	//   ++++++++      ++++++++++
-	// --++++++++--  --++++++++++---
-	curr := 0
-	start := 0
-	var offsets []colorOffset
-	add := func(idx int) {
-		if curr != 0 && idx > start {
-			if curr == -1 {
-				offsets = append(offsets, colorOffset{
-					offset: [2]int32{int32(start), int32(idx)}, color: color, bold: bold})
-			} else {
-				ansi := item.colors[curr-1]
-				fg := ansi.color.fg
-				if fg == -1 {
-					if current {
-						fg = curses.CurrentFG
-					} else {
-						fg = curses.FG
-					}
-				}
-				bg := ansi.color.bg
-				if bg == -1 {
-					if current {
-						bg = curses.DarkBG
-					} else {
-						bg = curses.BG
-					}
-				}
-				offsets = append(offsets, colorOffset{
-					offset: [2]int32{int32(start), int32(idx)},
-					color:  curses.PairFor(fg, bg),
-					bold:   ansi.color.bold || bold})
-			}
-		}
-	}
-	for idx, col := range cols {
-		if col != curr {
-			add(idx)
-			start = idx
-			curr = col
-		}
-	}
-	add(int(maxCol))
-	return offsets
-}
-
-// ByOrder is for sorting substring offsets
-type ByOrder []Offset
-
-func (a ByOrder) Len() int {
-	return len(a)
-}
-
-func (a ByOrder) Swap(i, j int) {
-	a[i], a[j] = a[j], a[i]
-}
-
-func (a ByOrder) Less(i, j int) bool {
-	ioff := a[i]
-	joff := a[j]
-	return (ioff[0] < joff[0]) || (ioff[0] == joff[0]) && (ioff[1] <= joff[1])
-}
-
-// ByRelevance is for sorting Items
-type ByRelevance []*Item
-
-func (a ByRelevance) Len() int {
-	return len(a)
-}
-
-func (a ByRelevance) Swap(i, j int) {
-	a[i], a[j] = a[j], a[i]
-}
-
-func (a ByRelevance) Less(i, j int) bool {
-	irank := a[i].Rank(true)
-	jrank := a[j].Rank(true)
-
-	return compareRanks(irank, jrank, false)
-}
-
-// ByRelevanceTac is for sorting Items
-type ByRelevanceTac []*Item
-
-func (a ByRelevanceTac) Len() int {
-	return len(a)
-}
-
-func (a ByRelevanceTac) Swap(i, j int) {
-	a[i], a[j] = a[j], a[i]
-}
-
-func (a ByRelevanceTac) Less(i, j int) bool {
-	irank := a[i].Rank(true)
-	jrank := a[j].Rank(true)
-
-	return compareRanks(irank, jrank, true)
-}
-
-func compareRanks(irank [5]int32, jrank [5]int32, tac bool) bool {
-	for idx := 0; idx < 4; idx++ {
-		left := irank[idx]
-		right := jrank[idx]
-		if left < right {
-			return true
-		} else if left > right {
-			return false
-		}
-	}
-	return (irank[4] <= jrank[4]) != tac
+	return item.text.ToString()
 }

src/item_test.go

@@ -1,108 +1,23 @@
 package fzf
 
 import (
-	"math"
-	"sort"
 	"testing"
 
-	"github.com/junegunn/fzf/src/curses"
+	"github.com/junegunn/fzf/src/util"
 )
 
-func TestOffsetSort(t *testing.T) {
-	offsets := []Offset{
-		Offset{3, 5}, Offset{2, 7},
-		Offset{1, 3}, Offset{2, 9}}
-	sort.Sort(ByOrder(offsets))
-
-	if offsets[0][0] != 1 || offsets[0][1] != 3 ||
-		offsets[1][0] != 2 || offsets[1][1] != 7 ||
-		offsets[2][0] != 2 || offsets[2][1] != 9 ||
-		offsets[3][0] != 3 || offsets[3][1] != 5 {
-		t.Error("Invalid order:", offsets)
+func TestStringPtr(t *testing.T) {
+	orig := []byte("\x1b[34mfoo")
+	text := []byte("\x1b[34mbar")
+	item := Item{origText: &orig, text: util.ToChars(text)}
+	if item.AsString(true) != "foo" || item.AsString(false) != string(orig) {
+		t.Fail()
+	}
+	if item.AsString(true) != "foo" {
+		t.Fail()
+	}
+	item.origText = nil
+	if item.AsString(true) != string(text) || item.AsString(false) != string(text) {
+		t.Fail()
 	}
 }
-
-func TestRankComparison(t *testing.T) {
-	if compareRanks([5]int32{3, 0, 0, 0, 5}, [5]int32{2, 0, 0, 0, 7}, false) ||
-		!compareRanks([5]int32{3, 0, 0, 0, 5}, [5]int32{3, 0, 0, 0, 6}, false) ||
-		!compareRanks([5]int32{1, 2, 0, 0, 3}, [5]int32{1, 3, 0, 0, 2}, false) ||
-		!compareRanks([5]int32{0, 0, 0, 0, 0}, [5]int32{0, 0, 0, 0, 0}, false) {
-		t.Error("Invalid order")
-	}
-
-	if compareRanks([5]int32{3, 0, 0, 0, 5}, [5]int32{2, 0, 0, 0, 7}, true) ||
-		!compareRanks([5]int32{3, 0, 0, 0, 5}, [5]int32{3, 0, 0, 0, 6}, false) ||
-		!compareRanks([5]int32{1, 2, 0, 0, 3}, [5]int32{1, 3, 0, 0, 2}, true) ||
-		!compareRanks([5]int32{0, 0, 0, 0, 0}, [5]int32{0, 0, 0, 0, 0}, false) {
-		t.Error("Invalid order (tac)")
-	}
-}
-
-// Match length, string length, index
-func TestItemRank(t *testing.T) {
-	// FIXME global
-	sortCriteria = []criterion{byMatchLen, byLength}
-
-	strs := [][]rune{[]rune("foo"), []rune("foobar"), []rune("bar"), []rune("baz")}
-	item1 := Item{text: strs[0], offsets: []Offset{}, rank: [5]int32{0, 0, 0, 0, 1}}
-	rank1 := item1.Rank(true)
-	if rank1[0] != math.MaxInt32 || rank1[1] != 3 || rank1[4] != 1 {
-		t.Error(item1.Rank(true))
-	}
-	// Only differ in index
-	item2 := Item{text: strs[0], offsets: []Offset{}}
-
-	items := []*Item{&item1, &item2}
-	sort.Sort(ByRelevance(items))
-	if items[0] != &item2 || items[1] != &item1 {
-		t.Error(items)
-	}
-
-	items = []*Item{&item2, &item1, &item1, &item2}
-	sort.Sort(ByRelevance(items))
-	if items[0] != &item2 || items[1] != &item2 ||
-		items[2] != &item1 || items[3] != &item1 {
-		t.Error(items)
-	}
-
-	// Sort by relevance
-	item3 := Item{text: strs[1], rank: [5]int32{0, 0, 0, 0, 2}, offsets: []Offset{Offset{1, 3}, Offset{5, 7}}}
-	item4 := Item{text: strs[1], rank: [5]int32{0, 0, 0, 0, 2}, offsets: []Offset{Offset{1, 2}, Offset{6, 7}}}
-	item5 := Item{text: strs[2], rank: [5]int32{0, 0, 0, 0, 2}, offsets: []Offset{Offset{1, 3}, Offset{5, 7}}}
-	item6 := Item{text: strs[2], rank: [5]int32{0, 0, 0, 0, 2}, offsets: []Offset{Offset{1, 2}, Offset{6, 7}}}
-	items = []*Item{&item1, &item2, &item3, &item4, &item5, &item6}
-	sort.Sort(ByRelevance(items))
-	if items[0] != &item6 || items[1] != &item4 ||
-		items[2] != &item5 || items[3] != &item3 ||
-		items[4] != &item2 || items[5] != &item1 {
-		t.Error(items)
-	}
-}
-
-func TestColorOffset(t *testing.T) {
-	// ------------ 20 ----  --  ----
-	//   ++++++++        ++++++++++
-	// --++++++++--    --++++++++++---
-	item := Item{
-		offsets: []Offset{Offset{5, 15}, Offset{25, 35}},
-		colors: []ansiOffset{
-			ansiOffset{[2]int32{0, 20}, ansiState{1, 5, false}},
-			ansiOffset{[2]int32{22, 27}, ansiState{2, 6, true}},
-			ansiOffset{[2]int32{30, 32}, ansiState{3, 7, false}},
-			ansiOffset{[2]int32{33, 40}, ansiState{4, 8, true}}}}
-	// [{[0 5] 9 false} {[5 15] 99 false} {[15 20] 9 false} {[22 25] 10 true} {[25 35] 99 false} {[35 40] 11 true}]
-
-	offsets := item.colorOffsets(99, false, true)
-	assert := func(idx int, b int32, e int32, c int, bold bool) {
-		o := offsets[idx]
-		if o.offset[0] != b || o.offset[1] != e || o.color != c || o.bold != bold {
-			t.Error(o)
-		}
-	}
-	assert(0, 0, 5, curses.ColUser, false)
-	assert(1, 5, 15, 99, false)
-	assert(2, 15, 20, curses.ColUser, false)
-	assert(3, 22, 25, curses.ColUser+1, true)
-	assert(4, 25, 35, 99, false)
-	assert(5, 35, 40, curses.ColUser+2, true)
-}

src/matcher.go

@@ -12,10 +12,11 @@ import (
 
 // MatchRequest represents a search request
 type MatchRequest struct {
-	chunks  []*Chunk
-	pattern *Pattern
-	final   bool
-	sort    bool
+	chunks   []*Chunk
+	pattern  *Pattern
+	final    bool
+	sort     bool
+	revision int
 }
 
 // Matcher is responsible for performing search
@@ -26,7 +27,9 @@ type Matcher struct {
 	eventBox       *util.EventBox
 	reqBox         *util.EventBox
 	partitions     int
+	slab           []*util.Slab
 	mergerCache    map[string]*Merger
+	revision       int
 }
 
 const (
@@ -36,15 +39,18 @@ const (
 
 // NewMatcher returns a new Matcher
 func NewMatcher(patternBuilder func([]rune) *Pattern,
-	sort bool, tac bool, eventBox *util.EventBox) *Matcher {
+	sort bool, tac bool, eventBox *util.EventBox, revision int) *Matcher {
+	partitions := util.Min(numPartitionsMultiplier*runtime.NumCPU(), maxPartitions)
 	return &Matcher{
 		patternBuilder: patternBuilder,
 		sort:           sort,
 		tac:            tac,
 		eventBox:       eventBox,
 		reqBox:         util.NewEventBox(),
-		partitions:     runtime.NumCPU(),
-		mergerCache:    make(map[string]*Merger)}
+		partitions:     partitions,
+		slab:           make([]*util.Slab, partitions),
+		mergerCache:    make(map[string]*Merger),
+		revision:       revision}
 }
 
 // Loop puts Matcher in action
@@ -66,8 +72,9 @@ func (m *Matcher) Loop() {
 			events.Clear()
 		})
 
-		if request.sort != m.sort {
+		if request.sort != m.sort || request.revision != m.revision {
 			m.sort = request.sort
+			m.revision = request.revision
 			m.mergerCache = make(map[string]*Merger)
 			clearChunkCache()
 		}
@@ -106,18 +113,19 @@ func (m *Matcher) Loop() {
 }
 
 func (m *Matcher) sliceChunks(chunks []*Chunk) [][]*Chunk {
-	perSlice := len(chunks) / m.partitions
+	partitions := m.partitions
+	perSlice := len(chunks) / partitions
 
-	// No need to parallelize
 	if perSlice == 0 {
-		return [][]*Chunk{chunks}
+		partitions = len(chunks)
+		perSlice = 1
 	}
 
-	slices := make([][]*Chunk, m.partitions)
-	for i := 0; i < m.partitions; i++ {
+	slices := make([][]*Chunk, partitions)
+	for i := 0; i < partitions; i++ {
 		start := i * perSlice
 		end := start + perSlice
-		if i == m.partitions-1 {
+		if i == partitions-1 {
 			end = len(chunks)
 		}
 		slices[i] = chunks[start:end]
@@ -127,7 +135,7 @@ func (m *Matcher) sliceChunks(chunks []*Chunk) [][]*Chunk {
 
 type partialResult struct {
 	index   int
-	matches []*Item
+	matches []Result
 }
 
 func (m *Matcher) scan(request MatchRequest) (*Merger, bool) {
@@ -135,11 +143,11 @@ func (m *Matcher) scan(request MatchRequest) (*Merger, bool) {
 
 	numChunks := len(request.chunks)
 	if numChunks == 0 {
-		return EmptyMerger, false
+		return EmptyMerger(request.revision), false
 	}
 	pattern := request.pattern
 	if pattern.IsEmpty() {
-		return PassMerger(&request.chunks, m.tac), false
+		return PassMerger(&request.chunks, m.tac, request.revision), false
 	}
 
 	cancelled := util.NewAtomicBool(false)
@@ -152,17 +160,26 @@ func (m *Matcher) scan(request MatchRequest) (*Merger, bool) {
 
 	for idx, chunks := range slices {
 		waitGroup.Add(1)
-		go func(idx int, chunks []*Chunk) {
+		if m.slab[idx] == nil {
+			m.slab[idx] = util.MakeSlab(slab16Size, slab32Size)
+		}
+		go func(idx int, slab *util.Slab, chunks []*Chunk) {
 			defer func() { waitGroup.Done() }()
-			sliceMatches := []*Item{}
-			for _, chunk := range chunks {
-				matches := request.pattern.Match(chunk)
-				sliceMatches = append(sliceMatches, matches...)
+			count := 0
+			allMatches := make([][]Result, len(chunks))
+			for idx, chunk := range chunks {
+				matches := request.pattern.Match(chunk, slab)
+				allMatches[idx] = matches
+				count += len(matches)
 				if cancelled.Get() {
 					return
 				}
 				countChan <- len(matches)
 			}
+			sliceMatches := make([]Result, 0, count)
+			for _, matches := range allMatches {
+				sliceMatches = append(sliceMatches, matches...)
+			}
 			if m.sort {
 				if m.tac {
 					sort.Sort(ByRelevanceTac(sliceMatches))
@@ -171,7 +188,7 @@ func (m *Matcher) scan(request MatchRequest) (*Merger, bool) {
 				}
 			}
 			resultChan <- partialResult{idx, sliceMatches}
-		}(idx, chunks)
+		}(idx, m.slab[idx], chunks)
 	}
 
 	wait := func() bool {
@@ -194,21 +211,21 @@ func (m *Matcher) scan(request MatchRequest) (*Merger, bool) {
 			return nil, wait()
 		}
 
-		if time.Now().Sub(startedAt) > progressMinDuration {
+		if time.Since(startedAt) > progressMinDuration {
 			m.eventBox.Set(EvtSearchProgress, float32(count)/float32(numChunks))
 		}
 	}
 
-	partialResults := make([][]*Item, numSlices)
-	for _, _ = range slices {
+	partialResults := make([][]Result, numSlices)
+	for range slices {
 		partialResult := <-resultChan
 		partialResults[partialResult.index] = partialResult.matches
 	}
-	return NewMerger(partialResults, m.sort, m.tac), false
+	return NewMerger(pattern, partialResults, m.sort, m.tac, request.revision), false
 }
 
 // Reset is called to interrupt/signal the ongoing search
-func (m *Matcher) Reset(chunks []*Chunk, patternRunes []rune, cancel bool, final bool, sort bool) {
+func (m *Matcher) Reset(chunks []*Chunk, patternRunes []rune, cancel bool, final bool, sort bool, revision int) {
 	pattern := m.patternBuilder(patternRunes)
 
 	var event util.EventType
@@ -217,5 +234,5 @@ func (m *Matcher) Reset(chunks []*Chunk, patternRunes []rune, cancel bool, final
 	} else {
 		event = reqRetry
 	}
-	m.reqBox.Set(event, MatchRequest{chunks, pattern, final, sort})
+	m.reqBox.Set(event, MatchRequest{chunks, pattern, final, sort && pattern.sortable, revision})
 }

src/merger.go

@@ -2,47 +2,57 @@ package fzf
 
 import "fmt"
 
-// Merger with no data
-var EmptyMerger = NewMerger([][]*Item{}, false, false)
+// EmptyMerger is a Merger with no data
+func EmptyMerger(revision int) *Merger {
+	return NewMerger(nil, [][]Result{}, false, false, revision)
+}
 
 // Merger holds a set of locally sorted lists of items and provides the view of
 // a single, globally-sorted list
 type Merger struct {
-	lists   [][]*Item
-	merged  []*Item
-	chunks  *[]*Chunk
-	cursors []int
-	sorted  bool
-	tac     bool
-	final   bool
-	count   int
+	pattern  *Pattern
+	lists    [][]Result
+	merged   []Result
+	chunks   *[]*Chunk
+	cursors  []int
+	sorted   bool
+	tac      bool
+	final    bool
+	count    int
+	pass     bool
+	revision int
 }
 
 // PassMerger returns a new Merger that simply returns the items in the
 // original order
-func PassMerger(chunks *[]*Chunk, tac bool) *Merger {
+func PassMerger(chunks *[]*Chunk, tac bool, revision int) *Merger {
 	mg := Merger{
-		chunks: chunks,
-		tac:    tac,
-		count:  0}
+		pattern:  nil,
+		chunks:   chunks,
+		tac:      tac,
+		count:    0,
+		pass:     true,
+		revision: revision}
 
 	for _, chunk := range *mg.chunks {
-		mg.count += len(*chunk)
+		mg.count += chunk.count
 	}
 	return &mg
 }
 
 // NewMerger returns a new Merger
-func NewMerger(lists [][]*Item, sorted bool, tac bool) *Merger {
+func NewMerger(pattern *Pattern, lists [][]Result, sorted bool, tac bool, revision int) *Merger {
 	mg := Merger{
-		lists:   lists,
-		merged:  []*Item{},
-		chunks:  nil,
-		cursors: make([]int, len(lists)),
-		sorted:  sorted,
-		tac:     tac,
-		final:   false,
-		count:   0}
+		pattern:  pattern,
+		lists:    lists,
+		merged:   []Result{},
+		chunks:   nil,
+		cursors:  make([]int, len(lists)),
+		sorted:   sorted,
+		tac:      tac,
+		final:    false,
+		count:    0,
+		revision: revision}
 
 	for _, list := range mg.lists {
 		mg.count += len(list)
@@ -50,19 +60,50 @@ func NewMerger(lists [][]*Item, sorted bool, tac bool) *Merger {
 	return &mg
 }
 
+// Revision returns revision number
+func (mg *Merger) Revision() int {
+	return mg.revision
+}
+
 // Length returns the number of items
 func (mg *Merger) Length() int {
 	return mg.count
 }
 
-// Get returns the pointer to the Item object indexed by the given integer
-func (mg *Merger) Get(idx int) *Item {
+func (mg *Merger) First() Result {
+	if mg.tac && !mg.sorted {
+		return mg.Get(mg.count - 1)
+	}
+	return mg.Get(0)
+}
+
+// FindIndex returns the index of the item with the given item index
+func (mg *Merger) FindIndex(itemIndex int32) int {
+	index := -1
+	if mg.pass {
+		index = int(itemIndex)
+		if mg.tac {
+			index = mg.count - index - 1
+		}
+	} else {
+		for i := 0; i < mg.count; i++ {
+			if mg.Get(i).item.Index() == itemIndex {
+				index = i
+				break
+			}
+		}
+	}
+	return index
+}
+
+// Get returns the pointer to the Result object indexed by the given integer
+func (mg *Merger) Get(idx int) Result {
 	if mg.chunks != nil {
 		if mg.tac {
 			idx = mg.count - idx - 1
 		}
 		chunk := (*mg.chunks)[idx/chunkSize]
-		return (*chunk)[idx%chunkSize]
+		return Result{item: &chunk.items[idx%chunkSize]}
 	}
 
 	if mg.sorted {
@@ -86,9 +127,9 @@ func (mg *Merger) cacheable() bool {
 	return mg.count < mergerCacheMax
 }
 
-func (mg *Merger) mergedGet(idx int) *Item {
+func (mg *Merger) mergedGet(idx int) Result {
 	for i := len(mg.merged); i <= idx; i++ {
-		minRank := buildEmptyRank(0)
+		minRank := minRank()
 		minIdx := -1
 		for listIdx, list := range mg.lists {
 			cursor := mg.cursors[listIdx]
@@ -97,13 +138,12 @@ func (mg *Merger) mergedGet(idx int) *Item {
 				continue
 			}
 			if cursor >= 0 {
-				rank := list[cursor].Rank(false)
+				rank := list[cursor]
 				if minIdx < 0 || compareRanks(rank, minRank, mg.tac) {
 					minRank = rank
 					minIdx = listIdx
 				}
 			}
-			mg.cursors[listIdx] = cursor
 		}
 
 		if minIdx >= 0 {

src/merger_test.go

@@ -5,6 +5,8 @@ import (
 	"math/rand"
 	"sort"
 	"testing"
+
+	"github.com/junegunn/fzf/src/util"
 )
 
 func assert(t *testing.T, cond bool, msg ...string) {
@@ -13,44 +15,37 @@ func assert(t *testing.T, cond bool, msg ...string) {
 	}
 }
 
-func randItem() *Item {
+func randResult() Result {
 	str := fmt.Sprintf("%d", rand.Uint32())
-	offsets := make([]Offset, rand.Int()%3)
-	for idx := range offsets {
-		sidx := int32(rand.Uint32() % 20)
-		eidx := sidx + int32(rand.Uint32()%20)
-		offsets[idx] = Offset{sidx, eidx}
-	}
-	return &Item{
-		text:    []rune(str),
-		rank:    buildEmptyRank(rand.Int31()),
-		offsets: offsets}
+	chars := util.ToChars([]byte(str))
+	chars.Index = rand.Int31()
+	return Result{item: &Item{text: chars}}
 }
 
 func TestEmptyMerger(t *testing.T) {
-	assert(t, EmptyMerger.Length() == 0, "Not empty")
-	assert(t, EmptyMerger.count == 0, "Invalid count")
-	assert(t, len(EmptyMerger.lists) == 0, "Invalid lists")
-	assert(t, len(EmptyMerger.merged) == 0, "Invalid merged list")
+	assert(t, EmptyMerger(0).Length() == 0, "Not empty")
+	assert(t, EmptyMerger(0).count == 0, "Invalid count")
+	assert(t, len(EmptyMerger(0).lists) == 0, "Invalid lists")
+	assert(t, len(EmptyMerger(0).merged) == 0, "Invalid merged list")
 }
 
-func buildLists(partiallySorted bool) ([][]*Item, []*Item) {
+func buildLists(partiallySorted bool) ([][]Result, []Result) {
 	numLists := 4
-	lists := make([][]*Item, numLists)
+	lists := make([][]Result, numLists)
 	cnt := 0
 	for i := 0; i < numLists; i++ {
-		numItems := rand.Int() % 20
-		cnt += numItems
-		lists[i] = make([]*Item, numItems)
-		for j := 0; j < numItems; j++ {
-			item := randItem()
+		numResults := rand.Int() % 20
+		cnt += numResults
+		lists[i] = make([]Result, numResults)
+		for j := 0; j < numResults; j++ {
+			item := randResult()
 			lists[i][j] = item
 		}
 		if partiallySorted {
 			sort.Sort(ByRelevance(lists[i]))
 		}
 	}
-	items := []*Item{}
+	items := []Result{}
 	for _, list := range lists {
 		items = append(items, list...)
 	}
@@ -62,7 +57,7 @@ func TestMergerUnsorted(t *testing.T) {
 	cnt := len(items)
 
 	// Not sorted: same order
-	mg := NewMerger(lists, false, false)
+	mg := NewMerger(nil, lists, false, false, 0)
 	assert(t, cnt == mg.Length(), "Invalid Length")
 	for i := 0; i < cnt; i++ {
 		assert(t, items[i] == mg.Get(i), "Invalid Get")
@@ -74,7 +69,7 @@ func TestMergerSorted(t *testing.T) {
 	cnt := len(items)
 
 	// Sorted sorted order
-	mg := NewMerger(lists, true, false)
+	mg := NewMerger(nil, lists, true, false, 0)
 	assert(t, cnt == mg.Length(), "Invalid Length")
 	sort.Sort(ByRelevance(items))
 	for i := 0; i < cnt; i++ {
@@ -84,7 +79,7 @@ func TestMergerSorted(t *testing.T) {
 	}
 
 	// Inverse order
-	mg2 := NewMerger(lists, true, false)
+	mg2 := NewMerger(nil, lists, true, false, 0)
 	for i := cnt - 1; i >= 0; i-- {
 		if items[i] != mg2.Get(i) {
 			t.Error("Not sorted", items[i], mg2.Get(i))

src/options_test.go

@@ -2,9 +2,10 @@ package fzf
 
 import (
 	"fmt"
+	"os"
 	"testing"
 
-	"github.com/junegunn/fzf/src/curses"
+	"github.com/junegunn/fzf/src/tui"
 )
 
 func TestDelimiterRegex(t *testing.T) {
@@ -42,24 +43,37 @@ func TestDelimiterRegex(t *testing.T) {
 
 func TestDelimiterRegexString(t *testing.T) {
 	delim := delimiterRegexp("*")
-	tokens := Tokenize([]rune("-*--*---**---"), delim)
+	tokens := Tokenize("-*--*---**---", delim)
 	if delim.regex != nil ||
-		string(tokens[0].text) != "-*" ||
-		string(tokens[1].text) != "--*" ||
-		string(tokens[2].text) != "---*" ||
-		string(tokens[3].text) != "*" ||
-		string(tokens[4].text) != "---" {
-		t.Errorf("%s %s %d", delim, tokens, len(tokens))
+		tokens[0].text.ToString() != "-*" ||
+		tokens[1].text.ToString() != "--*" ||
+		tokens[2].text.ToString() != "---*" ||
+		tokens[3].text.ToString() != "*" ||
+		tokens[4].text.ToString() != "---" {
+		t.Errorf("%s %v %d", delim, tokens, len(tokens))
 	}
 }
 
 func TestDelimiterRegexRegex(t *testing.T) {
 	delim := delimiterRegexp("--\\*")
-	tokens := Tokenize([]rune("-*--*---**---"), delim)
+	tokens := Tokenize("-*--*---**---", delim)
 	if delim.str != nil ||
-		string(tokens[0].text) != "-*--*" ||
-		string(tokens[1].text) != "---*" ||
-		string(tokens[2].text) != "*---" {
+		tokens[0].text.ToString() != "-*--*" ||
+		tokens[1].text.ToString() != "---*" ||
+		tokens[2].text.ToString() != "*---" {
+		t.Errorf("%s %d", tokens, len(tokens))
+	}
+}
+
+func TestDelimiterRegexRegexCaret(t *testing.T) {
+	delim := delimiterRegexp(`(^\s*|\s+)`)
+	tokens := Tokenize("foo  bar baz", delim)
+	if delim.str != nil ||
+		len(tokens) != 4 ||
+		tokens[0].text.ToString() != "" ||
+		tokens[1].text.ToString() != "foo  " ||
+		tokens[2].text.ToString() != "bar " ||
+		tokens[3].text.ToString() != "baz" {
 		t.Errorf("%s %d", tokens, len(tokens))
 	}
 }
@@ -70,7 +84,7 @@ func TestSplitNth(t *testing.T) {
 		if len(ranges) != 1 ||
 			ranges[0].begin != rangeEllipsis ||
 			ranges[0].end != rangeEllipsis {
-			t.Errorf("%s", ranges)
+			t.Errorf("%v", ranges)
 		}
 	}
 	{
@@ -86,7 +100,7 @@ func TestSplitNth(t *testing.T) {
 			ranges[7].begin != -2 || ranges[7].end != -2 ||
 			ranges[8].begin != 2 || ranges[8].end != -2 ||
 			ranges[9].begin != rangeEllipsis || ranges[9].end != rangeEllipsis {
-			t.Errorf("%s", ranges)
+			t.Errorf("%v", ranges)
 		}
 	}
 }
@@ -98,16 +112,16 @@ func TestIrrelevantNth(t *testing.T) {
 		parseOptions(opts, words)
 		postProcessOptions(opts)
 		if len(opts.Nth) != 0 {
-			t.Errorf("nth should be empty: %s", opts.Nth)
+			t.Errorf("nth should be empty: %v", opts.Nth)
 		}
 	}
-	for _, words := range [][]string{[]string{"--nth", "..,3", "+x"}, []string{"--nth", "3,1..", "+x"}, []string{"--nth", "..-1,1", "+x"}} {
+	for _, words := range [][]string{{"--nth", "..,3", "+x"}, {"--nth", "3,1..", "+x"}, {"--nth", "..-1,1", "+x"}} {
 		{
 			opts := defaultOptions()
 			parseOptions(opts, words)
 			postProcessOptions(opts)
 			if len(opts.Nth) != 0 {
-				t.Errorf("nth should be empty: %s", opts.Nth)
+				t.Errorf("nth should be empty: %v", opts.Nth)
 			}
 		}
 		{
@@ -116,64 +130,68 @@ func TestIrrelevantNth(t *testing.T) {
 			parseOptions(opts, words)
 			postProcessOptions(opts)
 			if len(opts.Nth) != 2 {
-				t.Errorf("nth should not be empty: %s", opts.Nth)
+				t.Errorf("nth should not be empty: %v", opts.Nth)
 			}
 		}
 	}
 }
 
 func TestParseKeys(t *testing.T) {
-	pairs := parseKeyChords("ctrl-z,alt-z,f2,@,Alt-a,!,ctrl-G,J,g,ALT-enter,alt-SPACE", "")
-	check := func(i int, s string) {
-		if pairs[i] != s {
-			t.Errorf("%s != %s", pairs[i], s)
+	pairs := parseKeyChords("ctrl-z,alt-z,f2,@,Alt-a,!,ctrl-G,J,g,ctrl-alt-a,ALT-enter,alt-SPACE", "")
+	checkEvent := func(e tui.Event, s string) {
+		if pairs[e] != s {
+			t.Errorf("%s != %s", pairs[e], s)
 		}
 	}
-	if len(pairs) != 11 {
-		t.Error(11)
+	check := func(et tui.EventType, s string) {
+		checkEvent(et.AsEvent(), s)
 	}
-	check(curses.CtrlZ, "ctrl-z")
-	check(curses.AltZ, "alt-z")
-	check(curses.F2, "f2")
-	check(curses.AltZ+'@', "@")
-	check(curses.AltA, "Alt-a")
-	check(curses.AltZ+'!', "!")
-	check(curses.CtrlA+'g'-'a', "ctrl-G")
-	check(curses.AltZ+'J', "J")
-	check(curses.AltZ+'g', "g")
-	check(curses.AltEnter, "ALT-enter")
-	check(curses.AltSpace, "alt-SPACE")
+	if len(pairs) != 12 {
+		t.Error(12)
+	}
+	check(tui.CtrlZ, "ctrl-z")
+	check(tui.F2, "f2")
+	check(tui.CtrlG, "ctrl-G")
+	checkEvent(tui.AltKey('z'), "alt-z")
+	checkEvent(tui.Key('@'), "@")
+	checkEvent(tui.AltKey('a'), "Alt-a")
+	checkEvent(tui.Key('!'), "!")
+	checkEvent(tui.Key('J'), "J")
+	checkEvent(tui.Key('g'), "g")
+	checkEvent(tui.CtrlAltKey('a'), "ctrl-alt-a")
+	checkEvent(tui.CtrlAltKey('m'), "ALT-enter")
+	checkEvent(tui.AltKey(' '), "alt-SPACE")
 
 	// Synonyms
 	pairs = parseKeyChords("enter,Return,space,tab,btab,esc,up,down,left,right", "")
 	if len(pairs) != 9 {
 		t.Error(9)
 	}
-	check(curses.CtrlM, "Return")
-	check(curses.AltZ+' ', "space")
-	check(curses.Tab, "tab")
-	check(curses.BTab, "btab")
-	check(curses.ESC, "esc")
-	check(curses.Up, "up")
-	check(curses.Down, "down")
-	check(curses.Left, "left")
-	check(curses.Right, "right")
+	check(tui.CtrlM, "Return")
+	checkEvent(tui.Key(' '), "space")
+	check(tui.Tab, "tab")
+	check(tui.BTab, "btab")
+	check(tui.ESC, "esc")
+	check(tui.Up, "up")
+	check(tui.Down, "down")
+	check(tui.Left, "left")
+	check(tui.Right, "right")
 
 	pairs = parseKeyChords("Tab,Ctrl-I,PgUp,page-up,pgdn,Page-Down,Home,End,Alt-BS,Alt-BSpace,shift-left,shift-right,btab,shift-tab,return,Enter,bspace", "")
 	if len(pairs) != 11 {
 		t.Error(11)
 	}
-	check(curses.Tab, "Ctrl-I")
-	check(curses.PgUp, "page-up")
-	check(curses.PgDn, "Page-Down")
-	check(curses.Home, "Home")
-	check(curses.End, "End")
-	check(curses.AltBS, "Alt-BSpace")
-	check(curses.SLeft, "shift-left")
-	check(curses.SRight, "shift-right")
-	check(curses.BTab, "shift-tab")
-	check(curses.CtrlM, "Enter")
-	check(curses.BSpace, "bspace")
+	check(tui.Tab, "Ctrl-I")
+	check(tui.PgUp, "page-up")
+	check(tui.PgDn, "Page-Down")
+	check(tui.Home, "Home")
+	check(tui.End, "End")
+	check(tui.AltBS, "Alt-BSpace")
+	check(tui.SLeft, "shift-left")
+	check(tui.SRight, "shift-right")
+	check(tui.BTab, "shift-tab")
+	check(tui.CtrlM, "Enter")
+	check(tui.BSpace, "bspace")
 }
 
 func TestParseKeysWithComma(t *testing.T) {
@@ -182,94 +200,109 @@ func TestParseKeysWithComma(t *testing.T) {
 			t.Errorf("%d != %d", a, b)
 		}
 	}
-	check := func(pairs map[int]string, i int, s string) {
-		if pairs[i] != s {
-			t.Errorf("%s != %s", pairs[i], s)
+	check := func(pairs map[tui.Event]string, e tui.Event, s string) {
+		if pairs[e] != s {
+			t.Errorf("%s != %s", pairs[e], s)
 		}
 	}
 
 	pairs := parseKeyChords(",", "")
 	checkN(len(pairs), 1)
-	check(pairs, curses.AltZ+',', ",")
+	check(pairs, tui.Key(','), ",")
 
 	pairs = parseKeyChords(",,a,b", "")
 	checkN(len(pairs), 3)
-	check(pairs, curses.AltZ+'a', "a")
-	check(pairs, curses.AltZ+'b', "b")
-	check(pairs, curses.AltZ+',', ",")
+	check(pairs, tui.Key('a'), "a")
+	check(pairs, tui.Key('b'), "b")
+	check(pairs, tui.Key(','), ",")
 
 	pairs = parseKeyChords("a,b,,", "")
 	checkN(len(pairs), 3)
-	check(pairs, curses.AltZ+'a', "a")
-	check(pairs, curses.AltZ+'b', "b")
-	check(pairs, curses.AltZ+',', ",")
+	check(pairs, tui.Key('a'), "a")
+	check(pairs, tui.Key('b'), "b")
+	check(pairs, tui.Key(','), ",")
 
 	pairs = parseKeyChords("a,,,b", "")
 	checkN(len(pairs), 3)
-	check(pairs, curses.AltZ+'a', "a")
-	check(pairs, curses.AltZ+'b', "b")
-	check(pairs, curses.AltZ+',', ",")
+	check(pairs, tui.Key('a'), "a")
+	check(pairs, tui.Key('b'), "b")
+	check(pairs, tui.Key(','), ",")
 
 	pairs = parseKeyChords("a,,,b,c", "")
 	checkN(len(pairs), 4)
-	check(pairs, curses.AltZ+'a', "a")
-	check(pairs, curses.AltZ+'b', "b")
-	check(pairs, curses.AltZ+'c', "c")
-	check(pairs, curses.AltZ+',', ",")
+	check(pairs, tui.Key('a'), "a")
+	check(pairs, tui.Key('b'), "b")
+	check(pairs, tui.Key('c'), "c")
+	check(pairs, tui.Key(','), ",")
 
 	pairs = parseKeyChords(",,,", "")
 	checkN(len(pairs), 1)
-	check(pairs, curses.AltZ+',', ",")
+	check(pairs, tui.Key(','), ",")
+
+	pairs = parseKeyChords(",ALT-,,", "")
+	checkN(len(pairs), 1)
+	check(pairs, tui.AltKey(','), "ALT-,")
 }
 
 func TestBind(t *testing.T) {
-	check := func(action actionType, expected actionType) {
-		if action != expected {
-			t.Errorf("%d != %d", action, expected)
-		}
-	}
-	checkString := func(action string, expected string) {
-		if action != expected {
-			t.Errorf("%d != %d", action, expected)
-		}
-	}
 	keymap := defaultKeymap()
-	execmap := make(map[int]string)
-	check(actBeginningOfLine, keymap[curses.CtrlA])
-	parseKeymap(keymap, execmap,
-		"ctrl-a:kill-line,ctrl-b:toggle-sort,c:page-up,alt-z:page-down,"+
-			"f1:execute(ls {}),f2:execute/echo {}, {}, {}/,f3:execute[echo '({})'],f4:execute;less {};,"+
-			"alt-a:execute@echo (,),[,],/,:,;,%,{}@,alt-b:execute;echo (,),[,],/,:,@,%,{};"+
-			",,:abort,::accept,X:execute:\nfoobar,Y:execute(baz)")
-	check(actKillLine, keymap[curses.CtrlA])
-	check(actToggleSort, keymap[curses.CtrlB])
-	check(actPageUp, keymap[curses.AltZ+'c'])
-	check(actAbort, keymap[curses.AltZ+','])
-	check(actAccept, keymap[curses.AltZ+':'])
-	check(actPageDown, keymap[curses.AltZ])
-	check(actExecute, keymap[curses.F1])
-	check(actExecute, keymap[curses.F2])
-	check(actExecute, keymap[curses.F3])
-	check(actExecute, keymap[curses.F4])
-	checkString("ls {}", execmap[curses.F1])
-	checkString("echo {}, {}, {}", execmap[curses.F2])
-	checkString("echo '({})'", execmap[curses.F3])
-	checkString("less {}", execmap[curses.F4])
-	checkString("echo (,),[,],/,:,;,%,{}", execmap[curses.AltA])
-	checkString("echo (,),[,],/,:,@,%,{}", execmap[curses.AltB])
-	checkString("\nfoobar,Y:execute(baz)", execmap[curses.AltZ+'X'])
+	check := func(event tui.Event, arg1 string, types ...actionType) {
+		if len(keymap[event]) != len(types) {
+			t.Errorf("invalid number of actions for %v (%d != %d)",
+				event, len(types), len(keymap[event]))
+			return
+		}
+		for idx, action := range keymap[event] {
+			if types[idx] != action.t {
+				t.Errorf("invalid action type (%d != %d)", types[idx], action.t)
+			}
+		}
+		if len(arg1) > 0 && keymap[event][0].a != arg1 {
+			t.Errorf("invalid action argument: (%s != %s)", arg1, keymap[event][0].a)
+		}
+	}
+	check(tui.CtrlA.AsEvent(), "", actBeginningOfLine)
+	errorString := ""
+	errorFn := func(e string) {
+		errorString = e
+	}
+	parseKeymap(keymap,
+		"ctrl-a:kill-line,ctrl-b:toggle-sort+up+down,c:page-up,alt-z:page-down,"+
+			"f1:execute(ls {+})+abort+execute(echo \n{+})+select-all,f2:execute/echo {}, {}, {}/,f3:execute[echo '({})'],f4:execute;less {};,"+
+			"alt-a:execute-Multi@echo (,),[,],/,:,;,%,{}@,alt-b:execute;echo (,),[,],/,:,@,%,{};,"+
+			"x:Execute(foo+bar),X:execute/bar+baz/"+
+			",f1:+first,f1:+top"+
+			",,:abort,::accept,+:execute:++\nfoobar,Y:execute(baz)+up", errorFn)
+	check(tui.CtrlA.AsEvent(), "", actKillLine)
+	check(tui.CtrlB.AsEvent(), "", actToggleSort, actUp, actDown)
+	check(tui.Key('c'), "", actPageUp)
+	check(tui.Key(','), "", actAbort)
+	check(tui.Key(':'), "", actAccept)
+	check(tui.AltKey('z'), "", actPageDown)
+	check(tui.F1.AsEvent(), "ls {+}", actExecute, actAbort, actExecute, actSelectAll, actFirst, actFirst)
+	check(tui.F2.AsEvent(), "echo {}, {}, {}", actExecute)
+	check(tui.F3.AsEvent(), "echo '({})'", actExecute)
+	check(tui.F4.AsEvent(), "less {}", actExecute)
+	check(tui.Key('x'), "foo+bar", actExecute)
+	check(tui.Key('X'), "bar+baz", actExecute)
+	check(tui.AltKey('a'), "echo (,),[,],/,:,;,%,{}", actExecuteMulti)
+	check(tui.AltKey('b'), "echo (,),[,],/,:,@,%,{}", actExecute)
+	check(tui.Key('+'), "++\nfoobar,Y:execute(baz)+up", actExecute)
 
 	for idx, char := range []rune{'~', '!', '@', '#', '$', '%', '^', '&', '*', '|', ';', '/'} {
-		parseKeymap(keymap, execmap, fmt.Sprintf("%d:execute%cfoobar%c", idx%10, char, char))
-		checkString("foobar", execmap[curses.AltZ+int([]rune(fmt.Sprintf("%d", idx%10))[0])])
+		parseKeymap(keymap, fmt.Sprintf("%d:execute%cfoobar%c", idx%10, char, char), errorFn)
+		check(tui.Key([]rune(fmt.Sprintf("%d", idx%10))[0]), "foobar", actExecute)
 	}
 
-	parseKeymap(keymap, execmap, "f1:abort")
-	check(actAbort, keymap[curses.F1])
+	parseKeymap(keymap, "f1:abort", errorFn)
+	check(tui.F1.AsEvent(), "", actAbort)
+	if len(errorString) > 0 {
+		t.Errorf("error parsing keymap: %s", errorString)
+	}
 }
 
 func TestColorSpec(t *testing.T) {
-	theme := curses.Dark256
+	theme := tui.Dark256
 	dark := parseTheme(theme, "dark")
 	if *dark != *theme {
 		t.Errorf("colors should be equivalent")
@@ -282,7 +315,7 @@ func TestColorSpec(t *testing.T) {
 	if *light == *theme {
 		t.Errorf("should not be equivalent")
 	}
-	if *light != *curses.Light256 {
+	if *light != *tui.Light256 {
 		t.Errorf("colors should be equivalent")
 	}
 	if light == theme {
@@ -290,76 +323,61 @@ func TestColorSpec(t *testing.T) {
 	}
 
 	customized := parseTheme(theme, "fg:231,bg:232")
-	if customized.Fg != 231 || customized.Bg != 232 {
+	if customized.Fg.Color != 231 || customized.Bg.Color != 232 {
 		t.Errorf("color not customized")
 	}
-	if *curses.Dark256 == *customized {
+	if *tui.Dark256 == *customized {
 		t.Errorf("colors should not be equivalent")
 	}
-	customized.Fg = curses.Dark256.Fg
-	customized.Bg = curses.Dark256.Bg
-	if *curses.Dark256 == *customized {
-		t.Errorf("colors should now be equivalent")
+	customized.Fg = tui.Dark256.Fg
+	customized.Bg = tui.Dark256.Bg
+	if *tui.Dark256 != *customized {
+		t.Errorf("colors should now be equivalent: %v, %v", tui.Dark256, customized)
 	}
 
 	customized = parseTheme(theme, "fg:231,dark,bg:232")
-	if customized.Fg != curses.Dark256.Fg || customized.Bg == curses.Dark256.Bg {
+	if customized.Fg != tui.Dark256.Fg || customized.Bg == tui.Dark256.Bg {
 		t.Errorf("color not customized")
 	}
-	if customized.UseDefault {
-		t.Errorf("not using default colors")
-	}
-	if !curses.Dark256.UseDefault {
-		t.Errorf("using default colors")
-	}
-}
-
-func TestParseNilTheme(t *testing.T) {
-	var theme *curses.ColorTheme
-	newTheme := parseTheme(theme, "prompt:12")
-	if newTheme != nil {
-		t.Errorf("color is disabled. keep it that way.")
-	}
-	newTheme = parseTheme(theme, "prompt:12,dark,prompt:13")
-	if newTheme.Prompt != 13 {
-		t.Errorf("color should now be enabled and customized")
-	}
 }
 
 func TestDefaultCtrlNP(t *testing.T) {
-	check := func(words []string, key int, expected actionType) {
+	check := func(words []string, et tui.EventType, expected actionType) {
+		e := et.AsEvent()
 		opts := defaultOptions()
 		parseOptions(opts, words)
 		postProcessOptions(opts)
-		if opts.Keymap[key] != expected {
+		if opts.Keymap[e][0].t != expected {
 			t.Error()
 		}
 	}
-	check([]string{}, curses.CtrlN, actDown)
-	check([]string{}, curses.CtrlP, actUp)
+	check([]string{}, tui.CtrlN, actDown)
+	check([]string{}, tui.CtrlP, actUp)
 
-	check([]string{"--bind=ctrl-n:accept"}, curses.CtrlN, actAccept)
-	check([]string{"--bind=ctrl-p:accept"}, curses.CtrlP, actAccept)
+	check([]string{"--bind=ctrl-n:accept"}, tui.CtrlN, actAccept)
+	check([]string{"--bind=ctrl-p:accept"}, tui.CtrlP, actAccept)
 
-	hist := "--history=/tmp/foo"
-	check([]string{hist}, curses.CtrlN, actNextHistory)
-	check([]string{hist}, curses.CtrlP, actPreviousHistory)
+	f, _ := os.CreateTemp("", "fzf-history")
+	f.Close()
+	hist := "--history=" + f.Name()
+	check([]string{hist}, tui.CtrlN, actNextHistory)
+	check([]string{hist}, tui.CtrlP, actPrevHistory)
 
-	check([]string{hist, "--bind=ctrl-n:accept"}, curses.CtrlN, actAccept)
-	check([]string{hist, "--bind=ctrl-n:accept"}, curses.CtrlP, actPreviousHistory)
+	check([]string{hist, "--bind=ctrl-n:accept"}, tui.CtrlN, actAccept)
+	check([]string{hist, "--bind=ctrl-n:accept"}, tui.CtrlP, actPrevHistory)
 
-	check([]string{hist, "--bind=ctrl-p:accept"}, curses.CtrlN, actNextHistory)
-	check([]string{hist, "--bind=ctrl-p:accept"}, curses.CtrlP, actAccept)
+	check([]string{hist, "--bind=ctrl-p:accept"}, tui.CtrlN, actNextHistory)
+	check([]string{hist, "--bind=ctrl-p:accept"}, tui.CtrlP, actAccept)
+}
+
+func optsFor(words ...string) *Options {
+	opts := defaultOptions()
+	parseOptions(opts, words)
+	postProcessOptions(opts)
+	return opts
 }
 
 func TestToggle(t *testing.T) {
-	optsFor := func(words ...string) *Options {
-		opts := defaultOptions()
-		parseOptions(opts, words)
-		postProcessOptions(opts)
-		return opts
-	}
-
 	opts := optsFor()
 	if opts.ToggleSort {
 		t.Error()
@@ -375,3 +393,118 @@ func TestToggle(t *testing.T) {
 		t.Error()
 	}
 }
+
+func TestPreviewOpts(t *testing.T) {
+	opts := optsFor()
+	if !(opts.Preview.command == "" &&
+		opts.Preview.hidden == false &&
+		opts.Preview.wrap == false &&
+		opts.Preview.position == posRight &&
+		opts.Preview.size.percent == true &&
+		opts.Preview.size.size == 50) {
+		t.Error()
+	}
+	opts = optsFor("--preview", "cat {}", "--preview-window=left:15,hidden,wrap:+{1}-/2")
+	if !(opts.Preview.command == "cat {}" &&
+		opts.Preview.hidden == true &&
+		opts.Preview.wrap == true &&
+		opts.Preview.position == posLeft &&
+		opts.Preview.scroll == "+{1}-/2" &&
+		opts.Preview.size.percent == false &&
+		opts.Preview.size.size == 15) {
+		t.Error(opts.Preview)
+	}
+	opts = optsFor("--preview-window=up,15,wrap,hidden,+{1}+3-1-2/2", "--preview-window=down", "--preview-window=cycle")
+	if !(opts.Preview.command == "" &&
+		opts.Preview.hidden == true &&
+		opts.Preview.wrap == true &&
+		opts.Preview.cycle == true &&
+		opts.Preview.position == posDown &&
+		opts.Preview.scroll == "+{1}+3-1-2/2" &&
+		opts.Preview.size.percent == false &&
+		opts.Preview.size.size == 15) {
+		t.Error(opts.Preview.size.size)
+	}
+	opts = optsFor("--preview-window=up:15:wrap:hidden")
+	if !(opts.Preview.command == "" &&
+		opts.Preview.hidden == true &&
+		opts.Preview.wrap == true &&
+		opts.Preview.position == posUp &&
+		opts.Preview.size.percent == false &&
+		opts.Preview.size.size == 15) {
+		t.Error(opts.Preview)
+	}
+	opts = optsFor("--preview=foo", "--preview-window=up", "--preview-window=default:70%")
+	if !(opts.Preview.command == "foo" &&
+		opts.Preview.position == posRight &&
+		opts.Preview.size.percent == true &&
+		opts.Preview.size.size == 70) {
+		t.Error(opts.Preview)
+	}
+}
+
+func TestAdditiveExpect(t *testing.T) {
+	opts := optsFor("--expect=a", "--expect", "b", "--expect=c")
+	if len(opts.Expect) != 3 {
+		t.Error(opts.Expect)
+	}
+}
+
+func TestValidateSign(t *testing.T) {
+	testCases := []struct {
+		inputSign string
+		isValid   bool
+	}{
+		{"> ", true},
+		{"아", true},
+		{"😀", true},
+		{"", false},
+		{">>>", false},
+	}
+
+	for _, testCase := range testCases {
+		err := validateSign(testCase.inputSign, "")
+		if testCase.isValid && err != nil {
+			t.Errorf("Input sign `%s` caused error", testCase.inputSign)
+		}
+
+		if !testCase.isValid && err == nil {
+			t.Errorf("Input sign `%s` did not cause error", testCase.inputSign)
+		}
+	}
+}
+
+func TestParseSingleActionList(t *testing.T) {
+	actions := parseSingleActionList("Execute@foo+bar,baz@+up+up+reload:down+down", func(string) {})
+	if len(actions) != 4 {
+		t.Errorf("Invalid number of actions parsed:%d", len(actions))
+	}
+	if actions[0].t != actExecute || actions[0].a != "foo+bar,baz" {
+		t.Errorf("Invalid action parsed: %v", actions[0])
+	}
+	if actions[1].t != actUp || actions[2].t != actUp {
+		t.Errorf("Invalid action parsed: %v / %v", actions[1], actions[2])
+	}
+	if actions[3].t != actReload || actions[3].a != "down+down" {
+		t.Errorf("Invalid action parsed: %v", actions[3])
+	}
+}
+
+func TestParseSingleActionListError(t *testing.T) {
+	err := ""
+	parseSingleActionList("change-query(foobar)baz", func(e string) {
+		err = e
+	})
+	if len(err) == 0 {
+		t.Errorf("Failed to detect error")
+	}
+}
+
+func TestMaskActionContents(t *testing.T) {
+	original := ":execute((f)(o)(o)(b)(a)(r))+change-query@qu@ry@+up,x:reload:hello:world"
+	expected := ":execute                    +change-query       +up,x:reload            "
+	masked := maskActionContents(original)
+	if masked != expected {
+		t.Errorf("Not masked: %s", masked)
+	}
+}

src/pattern.go

@@ -1,8 +1,8 @@
 package fzf
 
 import (
+	"fmt"
 	"regexp"
-	"sort"
 	"strings"
 
 	"github.com/junegunn/fzf/src/algo"
@@ -11,12 +11,12 @@ import (
 
 // fuzzy
 // 'exact
-// ^exact-prefix
-// exact-suffix$
-// !not-fuzzy
-// !'not-exact
-// !^not-exact-prefix
-// !not-exact-suffix$
+// ^prefix-exact
+// suffix-exact$
+// !inverse-exact
+// !'inverse-fuzzy
+// !^inverse-prefix-exact
+// !inverse-suffix-exact$
 
 type termType int
 
@@ -33,7 +33,12 @@ type term struct {
 	inv           bool
 	text          []rune
 	caseSensitive bool
-	origText      []rune
+	normalize     bool
+}
+
+// String returns the string representation of a term.
+func (t term) String() string {
+	return fmt.Sprintf("term{typ: %d, inv: %v, text: []rune(%q), caseSensitive: %v}", t.typ, t.inv, string(t.text), t.caseSensitive)
 }
 
 type termSet []term
@@ -41,15 +46,20 @@ type termSet []term
 // Pattern represents search pattern
 type Pattern struct {
 	fuzzy         bool
+	fuzzyAlgo     algo.Algo
 	extended      bool
 	caseSensitive bool
+	normalize     bool
 	forward       bool
+	withPos       bool
 	text          []rune
 	termSets      []termSet
+	sortable      bool
 	cacheable     bool
+	cacheKey      string
 	delimiter     Delimiter
 	nth           []Range
-	procFun       map[termType]func(bool, bool, []rune, []rune) algo.Result
+	procFun       map[termType]algo.Algo
 }
 
 var (
@@ -59,7 +69,7 @@ var (
 )
 
 func init() {
-	_splitRegex = regexp.MustCompile("\\s+")
+	_splitRegex = regexp.MustCompile(" +")
 	clearPatternCache()
 	clearChunkCache()
 }
@@ -75,12 +85,15 @@ func clearChunkCache() {
 }
 
 // BuildPattern builds Pattern object from the given arguments
-func BuildPattern(fuzzy bool, extended bool, caseMode Case, forward bool,
-	nth []Range, delimiter Delimiter, runes []rune) *Pattern {
+func BuildPattern(fuzzy bool, fuzzyAlgo algo.Algo, extended bool, caseMode Case, normalize bool, forward bool,
+	withPos bool, cacheable bool, nth []Range, delimiter Delimiter, runes []rune) *Pattern {
 
 	var asString string
 	if extended {
-		asString = strings.Trim(string(runes), " ")
+		asString = strings.TrimLeft(string(runes), " ")
+		for strings.HasSuffix(asString, " ") && !strings.HasSuffix(asString, "\\ ") {
+			asString = asString[:len(asString)-1]
+		}
 	} else {
 		asString = string(runes)
 	}
@@ -90,24 +103,35 @@ func BuildPattern(fuzzy bool, extended bool, caseMode Case, forward bool,
 		return cached
 	}
 
-	caseSensitive, cacheable := true, true
+	caseSensitive := true
+	sortable := true
 	termSets := []termSet{}
 
 	if extended {
-		termSets = parseTerms(fuzzy, caseMode, asString)
+		termSets = parseTerms(fuzzy, caseMode, normalize, asString)
+		// We should not sort the result if there are only inverse search terms
+		sortable = false
 	Loop:
 		for _, termSet := range termSets {
 			for idx, term := range termSet {
+				if !term.inv {
+					sortable = true
+				}
 				// If the query contains inverse search terms or OR operators,
 				// we cannot cache the search scope
-				if idx > 0 || term.inv {
+				if !cacheable || idx > 0 || term.inv || fuzzy && term.typ != termFuzzy || !fuzzy && term.typ != termExact {
 					cacheable = false
-					break Loop
+					if sortable {
+						// Can't break until we see at least one non-inverse term
+						break Loop
+					}
 				}
 			}
 		}
 	} else {
 		lowerString := strings.ToLower(asString)
+		normalize = normalize &&
+			lowerString == string(algo.NormalizeRunes([]rune(lowerString)))
 		caseSensitive = caseMode == CaseRespect ||
 			caseMode == CaseSmart && lowerString != asString
 		if !caseSensitive {
@@ -117,17 +141,22 @@ func BuildPattern(fuzzy bool, extended bool, caseMode Case, forward bool,
 
 	ptr := &Pattern{
 		fuzzy:         fuzzy,
+		fuzzyAlgo:     fuzzyAlgo,
 		extended:      extended,
 		caseSensitive: caseSensitive,
+		normalize:     normalize,
 		forward:       forward,
+		withPos:       withPos,
 		text:          []rune(asString),
 		termSets:      termSets,
+		sortable:      sortable,
 		cacheable:     cacheable,
 		nth:           nth,
 		delimiter:     delimiter,
-		procFun:       make(map[termType]func(bool, bool, []rune, []rune) algo.Result)}
+		procFun:       make(map[termType]algo.Algo)}
 
-	ptr.procFun[termFuzzy] = algo.FuzzyMatch
+	ptr.cacheKey = ptr.buildCacheKey()
+	ptr.procFun[termFuzzy] = fuzzyAlgo
 	ptr.procFun[termEqual] = algo.EqualMatch
 	ptr.procFun[termExact] = algo.ExactMatchNaive
 	ptr.procFun[termPrefix] = algo.PrefixMatch
@@ -137,37 +166,48 @@ func BuildPattern(fuzzy bool, extended bool, caseMode Case, forward bool,
 	return ptr
 }
 
-func parseTerms(fuzzy bool, caseMode Case, str string) []termSet {
+func parseTerms(fuzzy bool, caseMode Case, normalize bool, str string) []termSet {
+	str = strings.Replace(str, "\\ ", "\t", -1)
 	tokens := _splitRegex.Split(str, -1)
 	sets := []termSet{}
 	set := termSet{}
 	switchSet := false
+	afterBar := false
 	for _, token := range tokens {
-		typ, inv, text := termFuzzy, false, token
+		typ, inv, text := termFuzzy, false, strings.Replace(token, "\t", " ", -1)
 		lowerText := strings.ToLower(text)
 		caseSensitive := caseMode == CaseRespect ||
 			caseMode == CaseSmart && text != lowerText
+		normalizeTerm := normalize &&
+			lowerText == string(algo.NormalizeRunes([]rune(lowerText)))
 		if !caseSensitive {
 			text = lowerText
 		}
-		origText := []rune(text)
 		if !fuzzy {
 			typ = termExact
 		}
 
-		if text == "|" {
+		if len(set) > 0 && !afterBar && text == "|" {
 			switchSet = false
+			afterBar = true
 			continue
 		}
+		afterBar = false
 
 		if strings.HasPrefix(text, "!") {
 			inv = true
+			typ = termExact
 			text = text[1:]
 		}
 
+		if text != "$" && strings.HasSuffix(text, "$") {
+			typ = termSuffix
+			text = text[:len(text)-1]
+		}
+
 		if strings.HasPrefix(text, "'") {
 			// Flip exactness
-			if fuzzy {
+			if fuzzy && !inv {
 				typ = termExact
 				text = text[1:]
 			} else {
@@ -175,16 +215,12 @@ func parseTerms(fuzzy bool, caseMode Case, str string) []termSet {
 				text = text[1:]
 			}
 		} else if strings.HasPrefix(text, "^") {
-			if strings.HasSuffix(text, "$") {
+			if typ == termSuffix {
 				typ = termEqual
-				text = text[1 : len(text)-1]
 			} else {
 				typ = termPrefix
-				text = text[1:]
 			}
-		} else if strings.HasSuffix(text, "$") {
-			typ = termSuffix
-			text = text[:len(text)-1]
+			text = text[1:]
 		}
 
 		if len(text) > 0 {
@@ -192,12 +228,16 @@ func parseTerms(fuzzy bool, caseMode Case, str string) []termSet {
 				sets = append(sets, set)
 				set = termSet{}
 			}
+			textRunes := []rune(text)
+			if normalizeTerm {
+				textRunes = algo.NormalizeRunes(textRunes)
+			}
 			set = append(set, term{
 				typ:           typ,
 				inv:           inv,
-				text:          []rune(text),
+				text:          textRunes,
 				caseSensitive: caseSensitive,
-				origText:      origText})
+				normalize:     normalizeTerm})
 			switchSet = true
 		}
 	}
@@ -220,50 +260,38 @@ func (p *Pattern) AsString() string {
 	return string(p.text)
 }
 
-// CacheKey is used to build string to be used as the key of result cache
-func (p *Pattern) CacheKey() string {
+func (p *Pattern) buildCacheKey() string {
 	if !p.extended {
 		return p.AsString()
 	}
 	cacheableTerms := []string{}
 	for _, termSet := range p.termSets {
 		if len(termSet) == 1 && !termSet[0].inv && (p.fuzzy || termSet[0].typ == termExact) {
-			cacheableTerms = append(cacheableTerms, string(termSet[0].origText))
+			cacheableTerms = append(cacheableTerms, string(termSet[0].text))
 		}
 	}
-	return strings.Join(cacheableTerms, " ")
+	return strings.Join(cacheableTerms, "\t")
+}
+
+// CacheKey is used to build string to be used as the key of result cache
+func (p *Pattern) CacheKey() string {
+	return p.cacheKey
 }
 
 // Match returns the list of matches Items in the given Chunk
-func (p *Pattern) Match(chunk *Chunk) []*Item {
-	space := chunk
-
+func (p *Pattern) Match(chunk *Chunk, slab *util.Slab) []Result {
 	// ChunkCache: Exact match
 	cacheKey := p.CacheKey()
 	if p.cacheable {
-		if cached, found := _cache.Find(chunk, cacheKey); found {
+		if cached := _cache.Lookup(chunk, cacheKey); cached != nil {
 			return cached
 		}
 	}
 
-	// ChunkCache: Prefix/suffix match
-Loop:
-	for idx := 1; idx < len(cacheKey); idx++ {
-		// [---------| ] | [ |---------]
-		// [--------|  ] | [  |--------]
-		// [-------|   ] | [   |-------]
-		prefix := cacheKey[:len(cacheKey)-idx]
-		suffix := cacheKey[idx:]
-		for _, substr := range [2]*string{&prefix, &suffix} {
-			if cached, found := _cache.Find(chunk, *substr); found {
-				cachedChunk := Chunk(cached)
-				space = &cachedChunk
-				break Loop
-			}
-		}
-	}
+	// Prefix/suffix cache
+	space := _cache.Search(chunk, cacheKey)
 
-	matches := p.matchChunk(space)
+	matches := p.matchChunk(chunk, space, slab)
 
 	if p.cacheable {
 		_cache.Add(chunk, cacheKey, matches)
@@ -271,20 +299,19 @@ Loop:
 	return matches
 }
 
-func (p *Pattern) matchChunk(chunk *Chunk) []*Item {
-	matches := []*Item{}
-	if !p.extended {
-		for _, item := range *chunk {
-			offset, bonus := p.basicMatch(item)
-			if sidx := offset[0]; sidx >= 0 {
-				matches = append(matches,
-					dupItem(item, []Offset{offset}, bonus))
+func (p *Pattern) matchChunk(chunk *Chunk, space []Result, slab *util.Slab) []Result {
+	matches := []Result{}
+
+	if space == nil {
+		for idx := 0; idx < chunk.count; idx++ {
+			if match, _, _ := p.MatchItem(&chunk.items[idx], p.withPos, slab); match != nil {
+				matches = append(matches, *match)
 			}
 		}
 	} else {
-		for _, item := range *chunk {
-			if offsets, bonus := p.extendedMatch(item); len(offsets) == len(p.termSets) {
-				matches = append(matches, dupItem(item, offsets, bonus))
+		for _, result := range space {
+			if match, _, _ := p.MatchItem(result.item, p.withPos, slab); match != nil {
+				matches = append(matches, *match)
 			}
 		}
 	}
@@ -292,91 +319,109 @@ func (p *Pattern) matchChunk(chunk *Chunk) []*Item {
 }
 
 // MatchItem returns true if the Item is a match
-func (p *Pattern) MatchItem(item *Item) bool {
-	if !p.extended {
-		offset, _ := p.basicMatch(item)
-		sidx := offset[0]
-		return sidx >= 0
+func (p *Pattern) MatchItem(item *Item, withPos bool, slab *util.Slab) (*Result, []Offset, *[]int) {
+	if p.extended {
+		if offsets, bonus, pos := p.extendedMatch(item, withPos, slab); len(offsets) == len(p.termSets) {
+			result := buildResult(item, offsets, bonus)
+			return &result, offsets, pos
+		}
+		return nil, nil, nil
 	}
-	offsets, _ := p.extendedMatch(item)
-	return len(offsets) == len(p.termSets)
+	offset, bonus, pos := p.basicMatch(item, withPos, slab)
+	if sidx := offset[0]; sidx >= 0 {
+		offsets := []Offset{offset}
+		result := buildResult(item, offsets, bonus)
+		return &result, offsets, pos
+	}
+	return nil, nil, nil
 }
 
-func dupItem(item *Item, offsets []Offset, bonus int32) *Item {
-	sort.Sort(ByOrder(offsets))
-	return &Item{
-		text:        item.text,
-		origText:    item.origText,
-		transformed: item.transformed,
-		offsets:     offsets,
-		bonus:       bonus,
-		colors:      item.colors,
-		rank:        buildEmptyRank(item.Index())}
-}
-
-func (p *Pattern) basicMatch(item *Item) (Offset, int32) {
-	input := p.prepareInput(item)
+func (p *Pattern) basicMatch(item *Item, withPos bool, slab *util.Slab) (Offset, int, *[]int) {
+	var input []Token
+	if len(p.nth) == 0 {
+		input = []Token{{text: &item.text, prefixLength: 0}}
+	} else {
+		input = p.transformInput(item)
+	}
 	if p.fuzzy {
-		return p.iter(algo.FuzzyMatch, input, p.caseSensitive, p.forward, p.text)
+		return p.iter(p.fuzzyAlgo, input, p.caseSensitive, p.normalize, p.forward, p.text, withPos, slab)
 	}
-	return p.iter(algo.ExactMatchNaive, input, p.caseSensitive, p.forward, p.text)
+	return p.iter(algo.ExactMatchNaive, input, p.caseSensitive, p.normalize, p.forward, p.text, withPos, slab)
 }
 
-func (p *Pattern) extendedMatch(item *Item) ([]Offset, int32) {
-	input := p.prepareInput(item)
+func (p *Pattern) extendedMatch(item *Item, withPos bool, slab *util.Slab) ([]Offset, int, *[]int) {
+	var input []Token
+	if len(p.nth) == 0 {
+		input = []Token{{text: &item.text, prefixLength: 0}}
+	} else {
+		input = p.transformInput(item)
+	}
 	offsets := []Offset{}
-	var totalBonus int32
+	var totalScore int
+	var allPos *[]int
+	if withPos {
+		allPos = &[]int{}
+	}
 	for _, termSet := range p.termSets {
-		var offset *Offset
-		var bonus int32
+		var offset Offset
+		var currentScore int
+		matched := false
 		for _, term := range termSet {
 			pfun := p.procFun[term.typ]
-			off, pen := p.iter(pfun, input, term.caseSensitive, p.forward, term.text)
+			off, score, pos := p.iter(pfun, input, term.caseSensitive, term.normalize, p.forward, term.text, withPos, slab)
 			if sidx := off[0]; sidx >= 0 {
 				if term.inv {
 					continue
 				}
-				offset, bonus = &off, pen
+				offset, currentScore = off, score
+				matched = true
+				if withPos {
+					if pos != nil {
+						*allPos = append(*allPos, *pos...)
+					} else {
+						for idx := off[0]; idx < off[1]; idx++ {
+							*allPos = append(*allPos, int(idx))
+						}
+					}
+				}
 				break
 			} else if term.inv {
-				offset, bonus = &Offset{0, 0, 0}, 0
+				offset, currentScore = Offset{0, 0}, 0
+				matched = true
 				continue
 			}
 		}
-		if offset != nil {
-			offsets = append(offsets, *offset)
-			totalBonus += bonus
+		if matched {
+			offsets = append(offsets, offset)
+			totalScore += currentScore
 		}
 	}
-	return offsets, totalBonus
+	return offsets, totalScore, allPos
 }
 
-func (p *Pattern) prepareInput(item *Item) []Token {
+func (p *Pattern) transformInput(item *Item) []Token {
 	if item.transformed != nil {
-		return item.transformed
+		return *item.transformed
 	}
 
-	var ret []Token
-	if len(p.nth) > 0 {
-		tokens := Tokenize(item.text, p.delimiter)
-		ret = Transform(tokens, p.nth)
-	} else {
-		ret = []Token{Token{text: item.text, prefixLength: 0, trimLength: util.TrimLen(item.text)}}
-	}
-	item.transformed = ret
+	tokens := Tokenize(item.text.ToString(), p.delimiter)
+	ret := Transform(tokens, p.nth)
+	item.transformed = &ret
 	return ret
 }
 
-func (p *Pattern) iter(pfun func(bool, bool, []rune, []rune) algo.Result,
-	tokens []Token, caseSensitive bool, forward bool, pattern []rune) (Offset, int32) {
+func (p *Pattern) iter(pfun algo.Algo, tokens []Token, caseSensitive bool, normalize bool, forward bool, pattern []rune, withPos bool, slab *util.Slab) (Offset, int, *[]int) {
 	for _, part := range tokens {
-		prefixLength := int32(part.prefixLength)
-		if res := pfun(caseSensitive, forward, part.text, pattern); res.Start >= 0 {
-			var sidx int32 = res.Start + prefixLength
-			var eidx int32 = res.End + prefixLength
-			return Offset{sidx, eidx, int32(part.trimLength)}, res.Bonus
+		if res, pos := pfun(caseSensitive, normalize, forward, part.text, pattern, withPos, slab); res.Start >= 0 {
+			sidx := int32(res.Start) + part.prefixLength
+			eidx := int32(res.End) + part.prefixLength
+			if pos != nil {
+				for idx := range *pos {
+					(*pos)[idx] += int(part.prefixLength)
+				}
+			}
+			return Offset{sidx, eidx}, res.Score, pos
 		}
 	}
-	// TODO: math.MaxUint16
-	return Offset{-1, -1, -1}, 0.0
+	return Offset{-1, -1}, 0, nil
 }

src/pattern_test.go

@@ -5,45 +5,44 @@ import (
 	"testing"
 
 	"github.com/junegunn/fzf/src/algo"
+	"github.com/junegunn/fzf/src/util"
 )
 
+var slab *util.Slab
+
+func init() {
+	slab = util.MakeSlab(slab16Size, slab32Size)
+}
+
 func TestParseTermsExtended(t *testing.T) {
-	terms := parseTerms(true, CaseSmart,
-		"| aaa 'bbb ^ccc ddd$ !eee !'fff !^ggg !hhh$ | ^iii$ ^xxx | 'yyy | | zzz$ | !ZZZ |")
+	terms := parseTerms(true, CaseSmart, false,
+		"aaa 'bbb ^ccc ddd$ !eee !'fff !^ggg !hhh$ | ^iii$ ^xxx | 'yyy | zzz$ | !ZZZ |")
 	if len(terms) != 9 ||
 		terms[0][0].typ != termFuzzy || terms[0][0].inv ||
 		terms[1][0].typ != termExact || terms[1][0].inv ||
 		terms[2][0].typ != termPrefix || terms[2][0].inv ||
 		terms[3][0].typ != termSuffix || terms[3][0].inv ||
-		terms[4][0].typ != termFuzzy || !terms[4][0].inv ||
-		terms[5][0].typ != termExact || !terms[5][0].inv ||
+		terms[4][0].typ != termExact || !terms[4][0].inv ||
+		terms[5][0].typ != termFuzzy || !terms[5][0].inv ||
 		terms[6][0].typ != termPrefix || !terms[6][0].inv ||
 		terms[7][0].typ != termSuffix || !terms[7][0].inv ||
 		terms[7][1].typ != termEqual || terms[7][1].inv ||
 		terms[8][0].typ != termPrefix || terms[8][0].inv ||
 		terms[8][1].typ != termExact || terms[8][1].inv ||
 		terms[8][2].typ != termSuffix || terms[8][2].inv ||
-		terms[8][3].typ != termFuzzy || !terms[8][3].inv {
-		t.Errorf("%s", terms)
+		terms[8][3].typ != termExact || !terms[8][3].inv {
+		t.Errorf("%v", terms)
 	}
-	for idx, termSet := range terms[:8] {
+	for _, termSet := range terms[:8] {
 		term := termSet[0]
 		if len(term.text) != 3 {
-			t.Errorf("%s", term)
-		}
-		if idx > 0 && len(term.origText) != 4+idx/5 {
-			t.Errorf("%s", term)
-		}
-	}
-	for _, term := range terms[8] {
-		if len(term.origText) != 4 {
-			t.Errorf("%s", term)
+			t.Errorf("%v", term)
 		}
 	}
 }
 
 func TestParseTermsExtendedExact(t *testing.T) {
-	terms := parseTerms(false, CaseSmart,
+	terms := parseTerms(false, CaseSmart, false,
 		"aaa 'bbb ^ccc ddd$ !eee !'fff !^ggg !hhh$")
 	if len(terms) != 8 ||
 		terms[0][0].typ != termExact || terms[0][0].inv || len(terms[0][0].text) != 3 ||
@@ -54,59 +53,70 @@ func TestParseTermsExtendedExact(t *testing.T) {
 		terms[5][0].typ != termFuzzy || !terms[5][0].inv || len(terms[5][0].text) != 3 ||
 		terms[6][0].typ != termPrefix || !terms[6][0].inv || len(terms[6][0].text) != 3 ||
 		terms[7][0].typ != termSuffix || !terms[7][0].inv || len(terms[7][0].text) != 3 {
-		t.Errorf("%s", terms)
+		t.Errorf("%v", terms)
 	}
 }
 
 func TestParseTermsEmpty(t *testing.T) {
-	terms := parseTerms(true, CaseSmart, "' $ ^ !' !^ !$")
+	terms := parseTerms(true, CaseSmart, false, "' ^ !' !^")
 	if len(terms) != 0 {
-		t.Errorf("%s", terms)
+		t.Errorf("%v", terms)
 	}
 }
 
 func TestExact(t *testing.T) {
 	defer clearPatternCache()
 	clearPatternCache()
-	pattern := BuildPattern(true, true, CaseSmart, true,
+	pattern := BuildPattern(true, algo.FuzzyMatchV2, true, CaseSmart, false, true, false, true,
 		[]Range{}, Delimiter{}, []rune("'abc"))
-	res := algo.ExactMatchNaive(
-		pattern.caseSensitive, pattern.forward, []rune("aabbcc abc"), pattern.termSets[0][0].text)
+	chars := util.ToChars([]byte("aabbcc abc"))
+	res, pos := algo.ExactMatchNaive(
+		pattern.caseSensitive, pattern.normalize, pattern.forward, &chars, pattern.termSets[0][0].text, true, nil)
 	if res.Start != 7 || res.End != 10 {
-		t.Errorf("%s / %d / %d", pattern.termSets, res.Start, res.End)
+		t.Errorf("%v / %d / %d", pattern.termSets, res.Start, res.End)
+	}
+	if pos != nil {
+		t.Errorf("pos is expected to be nil")
 	}
 }
 
 func TestEqual(t *testing.T) {
 	defer clearPatternCache()
 	clearPatternCache()
-	pattern := BuildPattern(true, true, CaseSmart, true, []Range{}, Delimiter{}, []rune("^AbC$"))
+	pattern := BuildPattern(true, algo.FuzzyMatchV2, true, CaseSmart, false, true, false, true, []Range{}, Delimiter{}, []rune("^AbC$"))
 
-	match := func(str string, sidxExpected int32, eidxExpected int32) {
-		res := algo.EqualMatch(
-			pattern.caseSensitive, pattern.forward, []rune(str), pattern.termSets[0][0].text)
+	match := func(str string, sidxExpected int, eidxExpected int) {
+		chars := util.ToChars([]byte(str))
+		res, pos := algo.EqualMatch(
+			pattern.caseSensitive, pattern.normalize, pattern.forward, &chars, pattern.termSets[0][0].text, true, nil)
 		if res.Start != sidxExpected || res.End != eidxExpected {
-			t.Errorf("%s / %d / %d", pattern.termSets, res.Start, res.End)
+			t.Errorf("%v / %d / %d", pattern.termSets, res.Start, res.End)
+		}
+		if pos != nil {
+			t.Errorf("pos is expected to be nil")
 		}
 	}
 	match("ABC", -1, -1)
 	match("AbC", 0, 3)
+	match("AbC  ", 0, 3)
+	match(" AbC ", 1, 4)
+	match("  AbC", 2, 5)
 }
 
 func TestCaseSensitivity(t *testing.T) {
 	defer clearPatternCache()
 	clearPatternCache()
-	pat1 := BuildPattern(true, false, CaseSmart, true, []Range{}, Delimiter{}, []rune("abc"))
+	pat1 := BuildPattern(true, algo.FuzzyMatchV2, false, CaseSmart, false, true, false, true, []Range{}, Delimiter{}, []rune("abc"))
 	clearPatternCache()
-	pat2 := BuildPattern(true, false, CaseSmart, true, []Range{}, Delimiter{}, []rune("Abc"))
+	pat2 := BuildPattern(true, algo.FuzzyMatchV2, false, CaseSmart, false, true, false, true, []Range{}, Delimiter{}, []rune("Abc"))
 	clearPatternCache()
-	pat3 := BuildPattern(true, false, CaseIgnore, true, []Range{}, Delimiter{}, []rune("abc"))
+	pat3 := BuildPattern(true, algo.FuzzyMatchV2, false, CaseIgnore, false, true, false, true, []Range{}, Delimiter{}, []rune("abc"))
 	clearPatternCache()
-	pat4 := BuildPattern(true, false, CaseIgnore, true, []Range{}, Delimiter{}, []rune("Abc"))
+	pat4 := BuildPattern(true, algo.FuzzyMatchV2, false, CaseIgnore, false, true, false, true, []Range{}, Delimiter{}, []rune("Abc"))
 	clearPatternCache()
-	pat5 := BuildPattern(true, false, CaseRespect, true, []Range{}, Delimiter{}, []rune("abc"))
+	pat5 := BuildPattern(true, algo.FuzzyMatchV2, false, CaseRespect, false, true, false, true, []Range{}, Delimiter{}, []rune("abc"))
 	clearPatternCache()
-	pat6 := BuildPattern(true, false, CaseRespect, true, []Range{}, Delimiter{}, []rune("Abc"))
+	pat6 := BuildPattern(true, algo.FuzzyMatchV2, false, CaseRespect, false, true, false, true, []Range{}, Delimiter{}, []rune("Abc"))
 
 	if string(pat1.text) != "abc" || pat1.caseSensitive != false ||
 		string(pat2.text) != "Abc" || pat2.caseSensitive != true ||
@@ -119,46 +129,81 @@ func TestCaseSensitivity(t *testing.T) {
 }
 
 func TestOrigTextAndTransformed(t *testing.T) {
-	pattern := BuildPattern(true, true, CaseSmart, true, []Range{}, Delimiter{}, []rune("jg"))
-	tokens := Tokenize([]rune("junegunn"), Delimiter{})
-	trans := Transform(tokens, []Range{Range{1, 1}})
+	pattern := BuildPattern(true, algo.FuzzyMatchV2, true, CaseSmart, false, true, false, true, []Range{}, Delimiter{}, []rune("jg"))
+	tokens := Tokenize("junegunn", Delimiter{})
+	trans := Transform(tokens, []Range{{1, 1}})
 
-	origRunes := []rune("junegunn.choi")
+	origBytes := []byte("junegunn.choi")
 	for _, extended := range []bool{false, true} {
-		chunk := Chunk{
-			&Item{
-				text:        []rune("junegunn"),
-				origText:    &origRunes,
-				transformed: trans},
-		}
+		chunk := Chunk{count: 1}
+		chunk.items[0] = Item{
+			text:        util.ToChars([]byte("junegunn")),
+			origText:    &origBytes,
+			transformed: &trans}
 		pattern.extended = extended
-		matches := pattern.matchChunk(&chunk)
-		if string(matches[0].text) != "junegunn" || string(*matches[0].origText) != "junegunn.choi" ||
-			matches[0].offsets[0][0] != 0 || matches[0].offsets[0][1] != 5 ||
-			!reflect.DeepEqual(matches[0].transformed, trans) {
+		matches := pattern.matchChunk(&chunk, nil, slab) // No cache
+		if !(matches[0].item.text.ToString() == "junegunn" &&
+			string(*matches[0].item.origText) == "junegunn.choi" &&
+			reflect.DeepEqual(*matches[0].item.transformed, trans)) {
 			t.Error("Invalid match result", matches)
 		}
+
+		match, offsets, pos := pattern.MatchItem(&chunk.items[0], true, slab)
+		if !(match.item.text.ToString() == "junegunn" &&
+			string(*match.item.origText) == "junegunn.choi" &&
+			offsets[0][0] == 0 && offsets[0][1] == 5 &&
+			reflect.DeepEqual(*match.item.transformed, trans)) {
+			t.Error("Invalid match result", match, offsets, extended)
+		}
+		if !((*pos)[0] == 4 && (*pos)[1] == 0) {
+			t.Error("Invalid pos array", *pos)
+		}
 	}
 }
 
 func TestCacheKey(t *testing.T) {
 	test := func(extended bool, patStr string, expected string, cacheable bool) {
-		pat := BuildPattern(true, extended, CaseSmart, true, []Range{}, Delimiter{}, []rune(patStr))
+		clearPatternCache()
+		pat := BuildPattern(true, algo.FuzzyMatchV2, extended, CaseSmart, false, true, false, true, []Range{}, Delimiter{}, []rune(patStr))
 		if pat.CacheKey() != expected {
 			t.Errorf("Expected: %s, actual: %s", expected, pat.CacheKey())
 		}
 		if pat.cacheable != cacheable {
-			t.Errorf("Expected: %s, actual: %s (%s)", cacheable, pat.cacheable, patStr)
+			t.Errorf("Expected: %t, actual: %t (%s)", cacheable, pat.cacheable, patStr)
 		}
 		clearPatternCache()
 	}
 	test(false, "foo !bar", "foo !bar", true)
 	test(false, "foo | bar !baz", "foo | bar !baz", true)
-	test(true, "foo  bar  baz", "foo bar baz", true)
+	test(true, "foo  bar  baz", "foo\tbar\tbaz", true)
 	test(true, "foo !bar", "foo", false)
-	test(true, "foo !bar   baz", "foo baz", false)
+	test(true, "foo !bar   baz", "foo\tbaz", false)
 	test(true, "foo | bar baz", "baz", false)
 	test(true, "foo | bar | baz", "", false)
 	test(true, "foo | bar !baz", "", false)
-	test(true, "| | | foo", "foo", true)
+	test(true, "| | foo", "", false)
+	test(true, "| | | foo", "foo", false)
+}
+
+func TestCacheable(t *testing.T) {
+	test := func(fuzzy bool, str string, expected string, cacheable bool) {
+		clearPatternCache()
+		pat := BuildPattern(fuzzy, algo.FuzzyMatchV2, true, CaseSmart, true, true, false, true, []Range{}, Delimiter{}, []rune(str))
+		if pat.CacheKey() != expected {
+			t.Errorf("Expected: %s, actual: %s", expected, pat.CacheKey())
+		}
+		if cacheable != pat.cacheable {
+			t.Errorf("Invalid Pattern.cacheable for \"%s\": %v (expected: %v)", str, pat.cacheable, cacheable)
+		}
+		clearPatternCache()
+	}
+	test(true, "foo bar", "foo\tbar", true)
+	test(true, "foo 'bar", "foo\tbar", false)
+	test(true, "foo !bar", "foo", false)
+
+	test(false, "foo bar", "foo\tbar", true)
+	test(false, "foo 'bar", "foo", false)
+	test(false, "foo '", "foo", true)
+	test(false, "foo 'bar", "foo", false)
+	test(false, "foo !bar", "foo", false)
 }

src/protector/protector.go

@@ -0,0 +1,8 @@
+//go:build !openbsd
+
+package protector
+
+// Protect calls OS specific protections like pledge on OpenBSD
+func Protect() {
+	return
+}

src/protector/protector_openbsd.go

@@ -0,0 +1,10 @@
+//go:build openbsd
+
+package protector
+
+import "golang.org/x/sys/unix"
+
+// Protect calls OS specific protections like pledge on OpenBSD
+func Protect() {
+	unix.PledgePromises("stdio rpath tty proc exec inet tmppath")
+}

src/reader.go

@@ -2,10 +2,18 @@ package fzf
 
 import (
 	"bufio"
+	"context"
 	"io"
 	"os"
+	"os/exec"
+	"path"
+	"path/filepath"
+	"sync"
+	"sync/atomic"
+	"time"
 
 	"github.com/junegunn/fzf/src/util"
+	"github.com/saracen/walker"
 )
 
 // Reader reads from command or standard input
@@ -13,20 +21,109 @@ type Reader struct {
 	pusher   func([]byte) bool
 	eventBox *util.EventBox
 	delimNil bool
+	event    int32
+	finChan  chan bool
+	mutex    sync.Mutex
+	exec     *exec.Cmd
+	command  *string
+	killed   bool
+	wait     bool
+}
+
+// NewReader returns new Reader object
+func NewReader(pusher func([]byte) bool, eventBox *util.EventBox, delimNil bool, wait bool) *Reader {
+	return &Reader{pusher, eventBox, delimNil, int32(EvtReady), make(chan bool, 1), sync.Mutex{}, nil, nil, false, wait}
+}
+
+func (r *Reader) startEventPoller() {
+	go func() {
+		ptr := &r.event
+		pollInterval := readerPollIntervalMin
+		for {
+			if atomic.CompareAndSwapInt32(ptr, int32(EvtReadNew), int32(EvtReady)) {
+				r.eventBox.Set(EvtReadNew, (*string)(nil))
+				pollInterval = readerPollIntervalMin
+			} else if atomic.LoadInt32(ptr) == int32(EvtReadFin) {
+				if r.wait {
+					r.finChan <- true
+				}
+				return
+			} else {
+				pollInterval += readerPollIntervalStep
+				if pollInterval > readerPollIntervalMax {
+					pollInterval = readerPollIntervalMax
+				}
+			}
+			time.Sleep(pollInterval)
+		}
+	}()
+}
+
+func (r *Reader) fin(success bool) {
+	atomic.StoreInt32(&r.event, int32(EvtReadFin))
+	if r.wait {
+		<-r.finChan
+	}
+
+	r.mutex.Lock()
+	ret := r.command
+	if success || r.killed {
+		ret = nil
+	}
+	r.mutex.Unlock()
+
+	r.eventBox.Set(EvtReadFin, ret)
+}
+
+func (r *Reader) terminate() {
+	r.mutex.Lock()
+	defer func() { r.mutex.Unlock() }()
+
+	r.killed = true
+	if r.exec != nil && r.exec.Process != nil {
+		util.KillCommand(r.exec)
+	} else if defaultCommand != "" {
+		os.Stdin.Close()
+	}
+}
+
+func (r *Reader) restart(command string) {
+	r.event = int32(EvtReady)
+	r.startEventPoller()
+	success := r.readFromCommand(nil, command)
+	r.fin(success)
 }
 
 // ReadSource reads data from the default command or from standard input
 func (r *Reader) ReadSource() {
+	r.startEventPoller()
+	var success bool
 	if util.IsTty() {
+		// The default command for *nix requires a shell that supports "pipefail"
+		// https://unix.stackexchange.com/a/654932/62171
+		shell := "bash"
+		currentShell := os.Getenv("SHELL")
+		currentShellName := path.Base(currentShell)
+		for _, shellName := range []string{"bash", "zsh", "ksh", "ash", "hush", "mksh", "yash"} {
+			if currentShellName == shellName {
+				shell = currentShell
+				break
+			}
+		}
 		cmd := os.Getenv("FZF_DEFAULT_COMMAND")
 		if len(cmd) == 0 {
-			cmd = defaultCommand
+			if defaultCommand != "" {
+				success = r.readFromCommand(&shell, defaultCommand)
+			} else {
+				success = r.readFiles()
+			}
+		} else {
+			success = r.readFromCommand(nil, cmd)
 		}
-		r.readFromCommand(cmd)
 	} else {
-		r.readFromStdin()
+		success = r.readFromStdin()
 	}
-	r.eventBox.Set(EvtReadFin, nil)
+	r.fin(success)
 }
 
 func (r *Reader) feed(src io.Reader) {
@@ -34,17 +131,23 @@ func (r *Reader) feed(src io.Reader) {
 	if r.delimNil {
 		delim = '\000'
 	}
-	reader := bufio.NewReader(src)
+	reader := bufio.NewReaderSize(src, readerBufferSize)
 	for {
 		// ReadBytes returns err != nil if and only if the returned data does not
 		// end in delim.
 		bytea, err := reader.ReadBytes(delim)
-		if len(bytea) > 0 {
+		byteaLen := len(bytea)
+		if byteaLen > 0 {
 			if err == nil {
-				bytea = bytea[:len(bytea)-1]
+				// get rid of carriage return if under Windows:
+				if util.IsWindows() && byteaLen >= 2 && bytea[byteaLen-2] == byte('\r') {
+					bytea = bytea[:byteaLen-2]
+				} else {
+					bytea = bytea[:byteaLen-1]
+				}
 			}
 			if r.pusher(bytea) {
-				r.eventBox.Set(EvtReadNew, nil)
+				atomic.StoreInt32(&r.event, int32(EvtReadNew))
 			}
 		}
 		if err != nil {
@@ -53,20 +156,56 @@ func (r *Reader) feed(src io.Reader) {
 	}
 }
 
-func (r *Reader) readFromStdin() {
+func (r *Reader) readFromStdin() bool {
 	r.feed(os.Stdin)
+	return true
 }
 
-func (r *Reader) readFromCommand(cmd string) {
-	listCommand := util.ExecCommand(cmd)
-	out, err := listCommand.StdoutPipe()
-	if err != nil {
-		return
+func (r *Reader) readFiles() bool {
+	r.killed = false
+	fn := func(path string, mode os.FileInfo) error {
+		path = filepath.Clean(path)
+		if path != "." {
+			isDir := mode.Mode().IsDir()
+			if isDir && filepath.Base(path)[0] == '.' {
+				return filepath.SkipDir
+			}
+			if !isDir && r.pusher([]byte(path)) {
+				atomic.StoreInt32(&r.event, int32(EvtReadNew))
+			}
+		}
+		r.mutex.Lock()
+		defer r.mutex.Unlock()
+		if r.killed {
+			return context.Canceled
+		}
+		return nil
 	}
-	err = listCommand.Start()
-	if err != nil {
-		return
-	}
-	defer listCommand.Wait()
-	r.feed(out)
+	cb := walker.WithErrorCallback(func(pathname string, err error) error {
+		return nil
+	})
+	return walker.Walk(".", fn, cb) == nil
+}
+
+func (r *Reader) readFromCommand(shell *string, command string) bool {
+	r.mutex.Lock()
+	r.killed = false
+	r.command = &command
+	if shell != nil {
+		r.exec = util.ExecCommandWith(*shell, command, true)
+	} else {
+		r.exec = util.ExecCommand(command, true)
+	}
+	out, err := r.exec.StdoutPipe()
+	if err != nil {
+		r.mutex.Unlock()
+		return false
+	}
+	err = r.exec.Start()
+	r.mutex.Unlock()
+	if err != nil {
+		return false
+	}
+	r.feed(out)
+	return r.exec.Wait() == nil
 }

src/reader_test.go

@@ -2,6 +2,7 @@ package fzf
 
 import (
 	"testing"
+	"time"
 
 	"github.com/junegunn/fzf/src/util"
 )
@@ -9,9 +10,11 @@ import (
 func TestReadFromCommand(t *testing.T) {
 	strs := []string{}
 	eb := util.NewEventBox()
-	reader := Reader{
-		pusher:   func(s []byte) bool { strs = append(strs, string(s)); return true },
-		eventBox: eb}
+	reader := NewReader(
+		func(s []byte) bool { strs = append(strs, string(s)); return true },
+		eb, false, true)
+
+	reader.startEventPoller()
 
 	// Check EventBox
 	if eb.Peek(EvtReadNew) {
@@ -19,21 +22,16 @@ func TestReadFromCommand(t *testing.T) {
 	}
 
 	// Normal command
-	reader.readFromCommand(`echo abc && echo def`)
+	reader.fin(reader.readFromCommand(nil, `echo abc&&echo def`))
 	if len(strs) != 2 || strs[0] != "abc" || strs[1] != "def" {
 		t.Errorf("%s", strs)
 	}
 
 	// Check EventBox again
-	if !eb.Peek(EvtReadNew) {
-		t.Error("EvtReadNew should be set yet")
-	}
+	eb.WaitFor(EvtReadFin)
 
 	// Wait should return immediately
 	eb.Wait(func(events *util.Events) {
-		if _, found := (*events)[EvtReadNew]; !found {
-			t.Errorf("%s", events)
-		}
 		events.Clear()
 	})
 
@@ -42,8 +40,14 @@ func TestReadFromCommand(t *testing.T) {
 		t.Error("EvtReadNew should not be set yet")
 	}
 
+	// Make sure that event poller is finished
+	time.Sleep(readerPollIntervalMax)
+
+	// Restart event poller
+	reader.startEventPoller()
+
 	// Failing command
-	reader.readFromCommand(`no-such-command`)
+	reader.fin(reader.readFromCommand(nil, `no-such-command`))
 	strs = []string{}
 	if len(strs) > 0 {
 		t.Errorf("%s", strs)
@@ -51,6 +55,9 @@ func TestReadFromCommand(t *testing.T) {
 
 	// Check EventBox again
 	if eb.Peek(EvtReadNew) {
-		t.Error("Command failed. EvtReadNew should be set")
+		t.Error("Command failed. EvtReadNew should not be set")
+	}
+	if !eb.Peek(EvtReadFin) {
+		t.Error("EvtReadFin should be set")
 	}
 }

src/result.go

@@ -0,0 +1,261 @@
+package fzf
+
+import (
+	"math"
+	"sort"
+	"unicode"
+
+	"github.com/junegunn/fzf/src/tui"
+	"github.com/junegunn/fzf/src/util"
+)
+
+// Offset holds two 32-bit integers denoting the offsets of a matched substring
+type Offset [2]int32
+
+type colorOffset struct {
+	offset [2]int32
+	color  tui.ColorPair
+}
+
+type Result struct {
+	item   *Item
+	points [4]uint16
+}
+
+func buildResult(item *Item, offsets []Offset, score int) Result {
+	if len(offsets) > 1 {
+		sort.Sort(ByOrder(offsets))
+	}
+
+	result := Result{item: item}
+	numChars := item.text.Length()
+	minBegin := math.MaxUint16
+	minEnd := math.MaxUint16
+	maxEnd := 0
+	validOffsetFound := false
+	for _, offset := range offsets {
+		b, e := int(offset[0]), int(offset[1])
+		if b < e {
+			minBegin = util.Min(b, minBegin)
+			minEnd = util.Min(e, minEnd)
+			maxEnd = util.Max(e, maxEnd)
+			validOffsetFound = true
+		}
+	}
+
+	for idx, criterion := range sortCriteria {
+		val := uint16(math.MaxUint16)
+		switch criterion {
+		case byScore:
+			// Higher is better
+			val = math.MaxUint16 - util.AsUint16(score)
+		case byChunk:
+			if validOffsetFound {
+				b := minBegin
+				e := maxEnd
+				for ; b >= 1; b-- {
+					if unicode.IsSpace(item.text.Get(b - 1)) {
+						break
+					}
+				}
+				for ; e < numChars; e++ {
+					if unicode.IsSpace(item.text.Get(e)) {
+						break
+					}
+				}
+				val = util.AsUint16(e - b)
+			}
+		case byLength:
+			val = item.TrimLength()
+		case byBegin, byEnd:
+			if validOffsetFound {
+				whitePrefixLen := 0
+				for idx := 0; idx < numChars; idx++ {
+					r := item.text.Get(idx)
+					whitePrefixLen = idx
+					if idx == minBegin || !unicode.IsSpace(r) {
+						break
+					}
+				}
+				if criterion == byBegin {
+					val = util.AsUint16(minEnd - whitePrefixLen)
+				} else {
+					val = util.AsUint16(math.MaxUint16 - math.MaxUint16*(maxEnd-whitePrefixLen)/int(item.TrimLength()+1))
+				}
+			}
+		}
+		result.points[3-idx] = val
+	}
+
+	return result
+}
+
+// Sort criteria to use. Never changes once fzf is started.
+var sortCriteria []criterion
+
+// Index returns ordinal index of the Item
+func (result *Result) Index() int32 {
+	return result.item.Index()
+}
+
+func minRank() Result {
+	return Result{item: &minItem, points: [4]uint16{math.MaxUint16, 0, 0, 0}}
+}
+
+func (result *Result) colorOffsets(matchOffsets []Offset, theme *tui.ColorTheme, colBase tui.ColorPair, colMatch tui.ColorPair, current bool) []colorOffset {
+	itemColors := result.item.Colors()
+
+	// No ANSI codes
+	if len(itemColors) == 0 {
+		var offsets []colorOffset
+		for _, off := range matchOffsets {
+			offsets = append(offsets, colorOffset{offset: [2]int32{off[0], off[1]}, color: colMatch})
+		}
+		return offsets
+	}
+
+	// Find max column
+	var maxCol int32
+	for _, off := range matchOffsets {
+		if off[1] > maxCol {
+			maxCol = off[1]
+		}
+	}
+	for _, ansi := range itemColors {
+		if ansi.offset[1] > maxCol {
+			maxCol = ansi.offset[1]
+		}
+	}
+
+	cols := make([]int, maxCol)
+	for colorIndex, ansi := range itemColors {
+		for i := ansi.offset[0]; i < ansi.offset[1]; i++ {
+			cols[i] = colorIndex + 1 // 1-based index of itemColors
+		}
+	}
+
+	for _, off := range matchOffsets {
+		for i := off[0]; i < off[1]; i++ {
+			// Negative of 1-based index of itemColors
+			// - The extra -1 means highlighted
+			if cols[i] >= 0 {
+				cols[i] = cols[i]*-1 - 1
+			}
+		}
+	}
+
+	// sort.Sort(ByOrder(offsets))
+
+	// Merge offsets
+	// ------------  ----  --  ----
+	//   ++++++++      ++++++++++
+	// --++++++++--  --++++++++++---
+	curr := 0
+	start := 0
+	ansiToColorPair := func(ansi ansiOffset, base tui.ColorPair) tui.ColorPair {
+		fg := ansi.color.fg
+		bg := ansi.color.bg
+		if fg == -1 {
+			if current {
+				fg = theme.Current.Color
+			} else {
+				fg = theme.Fg.Color
+			}
+		}
+		if bg == -1 {
+			if current {
+				bg = theme.DarkBg.Color
+			} else {
+				bg = theme.Bg.Color
+			}
+		}
+		return tui.NewColorPair(fg, bg, ansi.color.attr).MergeAttr(base)
+	}
+	var colors []colorOffset
+	add := func(idx int) {
+		if curr != 0 && idx > start {
+			if curr < 0 {
+				color := colMatch
+				if curr < -1 && theme.Colored {
+					origColor := ansiToColorPair(itemColors[-curr-2], colMatch)
+					// hl or hl+ only sets the foreground color, so colMatch is the
+					// combination of either [hl and bg] or [hl+ and bg+].
+					//
+					// If the original text already has background color, and the
+					// foreground color of colMatch is -1, we shouldn't only apply the
+					// background color of colMatch.
+					// e.g. echo -e "\x1b[32;7mfoo\x1b[mbar" | fzf --ansi --color bg+:1,hl+:-1:underline
+					//      echo -e "\x1b[42mfoo\x1b[mbar" | fzf --ansi --color bg+:1,hl+:-1:underline
+					if color.Fg().IsDefault() && origColor.HasBg() {
+						color = origColor
+					} else {
+						color = origColor.MergeNonDefault(color)
+					}
+				}
+				colors = append(colors, colorOffset{
+					offset: [2]int32{int32(start), int32(idx)}, color: color})
+			} else {
+				ansi := itemColors[curr-1]
+				colors = append(colors, colorOffset{
+					offset: [2]int32{int32(start), int32(idx)},
+					color:  ansiToColorPair(ansi, colBase)})
+			}
+		}
+	}
+	for idx, col := range cols {
+		if col != curr {
+			add(idx)
+			start = idx
+			curr = col
+		}
+	}
+	add(int(maxCol))
+	return colors
+}
+
+// ByOrder is for sorting substring offsets
+type ByOrder []Offset
+
+func (a ByOrder) Len() int {
+	return len(a)
+}
+
+func (a ByOrder) Swap(i, j int) {
+	a[i], a[j] = a[j], a[i]
+}
+
+func (a ByOrder) Less(i, j int) bool {
+	ioff := a[i]
+	joff := a[j]
+	return (ioff[0] < joff[0]) || (ioff[0] == joff[0]) && (ioff[1] <= joff[1])
+}
+
+// ByRelevance is for sorting Items
+type ByRelevance []Result
+
+func (a ByRelevance) Len() int {
+	return len(a)
+}
+
+func (a ByRelevance) Swap(i, j int) {
+	a[i], a[j] = a[j], a[i]
+}
+
+func (a ByRelevance) Less(i, j int) bool {
+	return compareRanks(a[i], a[j], false)
+}
+
+// ByRelevanceTac is for sorting Items
+type ByRelevanceTac []Result
+
+func (a ByRelevanceTac) Len() int {
+	return len(a)
+}
+
+func (a ByRelevanceTac) Swap(i, j int) {
+	a[i], a[j] = a[j], a[i]
+}
+
+func (a ByRelevanceTac) Less(i, j int) bool {
+	return compareRanks(a[i], a[j], true)
+}

src/result_others.go

@@ -0,0 +1,16 @@
+//go:build !386 && !amd64
+
+package fzf
+
+func compareRanks(irank Result, jrank Result, tac bool) bool {
+	for idx := 3; idx >= 0; idx-- {
+		left := irank.points[idx]
+		right := jrank.points[idx]
+		if left < right {
+			return true
+		} else if left > right {
+			return false
+		}
+	}
+	return (irank.item.Index() <= jrank.item.Index()) != tac
+}

src/result_test.go

@@ -0,0 +1,174 @@
+package fzf
+
+import (
+	"math"
+	"sort"
+	"testing"
+
+	"github.com/junegunn/fzf/src/tui"
+	"github.com/junegunn/fzf/src/util"
+)
+
+func withIndex(i *Item, index int) *Item {
+	(*i).text.Index = int32(index)
+	return i
+}
+
+func TestOffsetSort(t *testing.T) {
+	offsets := []Offset{
+		{3, 5}, {2, 7},
+		{1, 3}, {2, 9}}
+	sort.Sort(ByOrder(offsets))
+
+	if offsets[0][0] != 1 || offsets[0][1] != 3 ||
+		offsets[1][0] != 2 || offsets[1][1] != 7 ||
+		offsets[2][0] != 2 || offsets[2][1] != 9 ||
+		offsets[3][0] != 3 || offsets[3][1] != 5 {
+		t.Error("Invalid order:", offsets)
+	}
+}
+
+func TestRankComparison(t *testing.T) {
+	rank := func(vals ...uint16) Result {
+		return Result{
+			points: [4]uint16{vals[0], vals[1], vals[2], vals[3]},
+			item:   &Item{text: util.Chars{Index: int32(vals[4])}}}
+	}
+	if compareRanks(rank(3, 0, 0, 0, 5), rank(2, 0, 0, 0, 7), false) ||
+		!compareRanks(rank(3, 0, 0, 0, 5), rank(3, 0, 0, 0, 6), false) ||
+		!compareRanks(rank(1, 2, 0, 0, 3), rank(1, 3, 0, 0, 2), false) ||
+		!compareRanks(rank(0, 0, 0, 0, 0), rank(0, 0, 0, 0, 0), false) {
+		t.Error("Invalid order")
+	}
+
+	if compareRanks(rank(3, 0, 0, 0, 5), rank(2, 0, 0, 0, 7), true) ||
+		!compareRanks(rank(3, 0, 0, 0, 5), rank(3, 0, 0, 0, 6), false) ||
+		!compareRanks(rank(1, 2, 0, 0, 3), rank(1, 3, 0, 0, 2), true) ||
+		!compareRanks(rank(0, 0, 0, 0, 0), rank(0, 0, 0, 0, 0), false) {
+		t.Error("Invalid order (tac)")
+	}
+}
+
+// Match length, string length, index
+func TestResultRank(t *testing.T) {
+	// FIXME global
+	sortCriteria = []criterion{byScore, byLength}
+
+	str := []rune("foo")
+	item1 := buildResult(
+		withIndex(&Item{text: util.RunesToChars(str)}, 1), []Offset{}, 2)
+	if item1.points[3] != math.MaxUint16-2 || // Bonus
+		item1.points[2] != 3 || // Length
+		item1.points[1] != 0 || // Unused
+		item1.points[0] != 0 || // Unused
+		item1.item.Index() != 1 {
+		t.Error(item1)
+	}
+	// Only differ in index
+	item2 := buildResult(&Item{text: util.RunesToChars(str)}, []Offset{}, 2)
+
+	items := []Result{item1, item2}
+	sort.Sort(ByRelevance(items))
+	if items[0] != item2 || items[1] != item1 {
+		t.Error(items)
+	}
+
+	items = []Result{item2, item1, item1, item2}
+	sort.Sort(ByRelevance(items))
+	if items[0] != item2 || items[1] != item2 ||
+		items[2] != item1 || items[3] != item1 {
+		t.Error(items, item1, item1.item.Index(), item2, item2.item.Index())
+	}
+
+	// Sort by relevance
+	item3 := buildResult(
+		withIndex(&Item{}, 2), []Offset{{1, 3}, {5, 7}}, 3)
+	item4 := buildResult(
+		withIndex(&Item{}, 2), []Offset{{1, 2}, {6, 7}}, 4)
+	item5 := buildResult(
+		withIndex(&Item{}, 2), []Offset{{1, 3}, {5, 7}}, 5)
+	item6 := buildResult(
+		withIndex(&Item{}, 2), []Offset{{1, 2}, {6, 7}}, 6)
+	items = []Result{item1, item2, item3, item4, item5, item6}
+	sort.Sort(ByRelevance(items))
+	if !(items[0] == item6 && items[1] == item5 &&
+		items[2] == item4 && items[3] == item3 &&
+		items[4] == item2 && items[5] == item1) {
+		t.Error(items, item1, item2, item3, item4, item5, item6)
+	}
+}
+
+func TestChunkTiebreak(t *testing.T) {
+	// FIXME global
+	sortCriteria = []criterion{byScore, byChunk}
+
+	score := 100
+	test := func(input string, offset Offset, chunk string) {
+		item := buildResult(withIndex(&Item{text: util.RunesToChars([]rune(input))}, 1), []Offset{offset}, score)
+		if !(item.points[3] == math.MaxUint16-uint16(score) && item.points[2] == uint16(len(chunk))) {
+			t.Error(item.points)
+		}
+	}
+	test("hello foobar goodbye", Offset{8, 9}, "foobar")
+	test("hello foobar goodbye", Offset{7, 18}, "foobar goodbye")
+	test("hello foobar goodbye", Offset{0, 1}, "hello")
+	test("hello foobar goodbye", Offset{5, 7}, "hello foobar") // TBD
+}
+
+func TestColorOffset(t *testing.T) {
+	// ------------ 20 ----  --  ----
+	//   ++++++++        ++++++++++
+	// --++++++++--    --++++++++++---
+
+	offsets := []Offset{{5, 15}, {10, 12}, {25, 35}}
+	item := Result{
+		item: &Item{
+			colors: &[]ansiOffset{
+				{[2]int32{0, 20}, ansiState{1, 5, 0, -1}},
+				{[2]int32{22, 27}, ansiState{2, 6, tui.Bold, -1}},
+				{[2]int32{30, 32}, ansiState{3, 7, 0, -1}},
+				{[2]int32{33, 40}, ansiState{4, 8, tui.Bold, -1}}}}}
+
+	colBase := tui.NewColorPair(89, 189, tui.AttrUndefined)
+	colMatch := tui.NewColorPair(99, 199, tui.AttrUndefined)
+	colors := item.colorOffsets(offsets, tui.Dark256, colBase, colMatch, true)
+	assert := func(idx int, b int32, e int32, c tui.ColorPair) {
+		o := colors[idx]
+		if o.offset[0] != b || o.offset[1] != e || o.color != c {
+			t.Error(o, b, e, c)
+		}
+	}
+	// [{[0 5] {1 5 0}} {[5 15] {99 199 0}} {[15 20] {1 5 0}}
+	//  {[22 25] {2 6 1}} {[25 27] {99 199 1}} {[27 30] {99 199 0}}
+	//  {[30 32] {99 199 0}} {[32 33] {99 199 0}} {[33 35] {99 199 1}}
+	//  {[35 40] {4 8 1}}]
+	assert(0, 0, 5, tui.NewColorPair(1, 5, tui.AttrUndefined))
+	assert(1, 5, 15, colMatch)
+	assert(2, 15, 20, tui.NewColorPair(1, 5, tui.AttrUndefined))
+	assert(3, 22, 25, tui.NewColorPair(2, 6, tui.Bold))
+	assert(4, 25, 27, colMatch.WithAttr(tui.Bold))
+	assert(5, 27, 30, colMatch)
+	assert(6, 30, 32, colMatch)
+	assert(7, 32, 33, colMatch) // TODO: Should we merge consecutive blocks?
+	assert(8, 33, 35, colMatch.WithAttr(tui.Bold))
+	assert(9, 35, 40, tui.NewColorPair(4, 8, tui.Bold))
+
+	colRegular := tui.NewColorPair(-1, -1, tui.AttrUndefined)
+	colUnderline := tui.NewColorPair(-1, -1, tui.Underline)
+	colors = item.colorOffsets(offsets, tui.Dark256, colRegular, colUnderline, true)
+
+	// [{[0 5] {1 5 0}} {[5 15] {1 5 8}} {[15 20] {1 5 0}}
+	//  {[22 25] {2 6 1}} {[25 27] {2 6 9}} {[27 30] {-1 -1 8}}
+	//  {[30 32] {3 7 8}} {[32 33] {-1 -1 8}} {[33 35] {4 8 9}}
+	//  {[35 40] {4 8 1}}]
+	assert(0, 0, 5, tui.NewColorPair(1, 5, tui.AttrUndefined))
+	assert(1, 5, 15, tui.NewColorPair(1, 5, tui.Underline))
+	assert(2, 15, 20, tui.NewColorPair(1, 5, tui.AttrUndefined))
+	assert(3, 22, 25, tui.NewColorPair(2, 6, tui.Bold))
+	assert(4, 25, 27, tui.NewColorPair(2, 6, tui.Bold|tui.Underline))
+	assert(5, 27, 30, colUnderline)
+	assert(6, 30, 32, tui.NewColorPair(3, 7, tui.Underline))
+	assert(7, 32, 33, colUnderline)
+	assert(8, 33, 35, tui.NewColorPair(4, 8, tui.Bold|tui.Underline))
+	assert(9, 35, 40, tui.NewColorPair(4, 8, tui.Bold))
+}

src/result_x86.go

@@ -0,0 +1,16 @@
+//go:build 386 || amd64
+
+package fzf
+
+import "unsafe"
+
+func compareRanks(irank Result, jrank Result, tac bool) bool {
+	left := *(*uint64)(unsafe.Pointer(&irank.points[0]))
+	right := *(*uint64)(unsafe.Pointer(&jrank.points[0]))
+	if left < right {
+		return true
+	} else if left > right {
+		return false
+	}
+	return (irank.item.Index() <= jrank.item.Index()) != tac
+}

src/server.go

@@ -0,0 +1,254 @@
+package fzf
+
+import (
+	"bufio"
+	"bytes"
+	"crypto/subtle"
+	"errors"
+	"fmt"
+	"net"
+	"os"
+	"regexp"
+	"strconv"
+	"strings"
+	"time"
+)
+
+var getRegex *regexp.Regexp
+
+func init() {
+	getRegex = regexp.MustCompile(`^GET /(?:\?([a-z0-9=&]+))? HTTP`)
+}
+
+type getParams struct {
+	limit  int
+	offset int
+}
+
+const (
+	crlf             = "\r\n"
+	httpOk           = "HTTP/1.1 200 OK" + crlf
+	httpBadRequest   = "HTTP/1.1 400 Bad Request" + crlf
+	httpUnauthorized = "HTTP/1.1 401 Unauthorized" + crlf
+	httpUnavailable  = "HTTP/1.1 503 Service Unavailable" + crlf
+	httpReadTimeout  = 10 * time.Second
+	jsonContentType  = "Content-Type: application/json" + crlf
+	maxContentLength = 1024 * 1024
+)
+
+type httpServer struct {
+	apiKey          []byte
+	actionChannel   chan []*action
+	responseChannel chan string
+}
+
+type listenAddress struct {
+	host string
+	port int
+}
+
+func (addr listenAddress) IsLocal() bool {
+	return addr.host == "localhost" || addr.host == "127.0.0.1"
+}
+
+var defaultListenAddr = listenAddress{"localhost", 0}
+
+func parseListenAddress(address string) (error, listenAddress) {
+	parts := strings.SplitN(address, ":", 3)
+	if len(parts) == 1 {
+		parts = []string{"localhost", parts[0]}
+	}
+	if len(parts) != 2 {
+		return fmt.Errorf("invalid listen address: %s", address), defaultListenAddr
+	}
+	portStr := parts[len(parts)-1]
+	port, err := strconv.Atoi(portStr)
+	if err != nil || port < 0 || port > 65535 {
+		return fmt.Errorf("invalid listen port: %s", portStr), defaultListenAddr
+	}
+	if len(parts[0]) == 0 {
+		parts[0] = "localhost"
+	}
+	return nil, listenAddress{parts[0], port}
+}
+
+func startHttpServer(address listenAddress, actionChannel chan []*action, responseChannel chan string) (error, int) {
+	host := address.host
+	port := address.port
+	apiKey := os.Getenv("FZF_API_KEY")
+	if !address.IsLocal() && len(apiKey) == 0 {
+		return fmt.Errorf("FZF_API_KEY is required to allow remote access"), port
+	}
+	addrStr := fmt.Sprintf("%s:%d", host, port)
+	listener, err := net.Listen("tcp", addrStr)
+	if err != nil {
+		return fmt.Errorf("failed to listen on %s", addrStr), port
+	}
+	if port == 0 {
+		addr := listener.Addr().String()
+		parts := strings.Split(addr, ":")
+		if len(parts) < 2 {
+			return fmt.Errorf("cannot extract port: %s", addr), port
+		}
+		var err error
+		port, err = strconv.Atoi(parts[len(parts)-1])
+		if err != nil {
+			return err, port
+		}
+	}
+
+	server := httpServer{
+		apiKey:          []byte(apiKey),
+		actionChannel:   actionChannel,
+		responseChannel: responseChannel,
+	}
+
+	go func() {
+		for {
+			conn, err := listener.Accept()
+			if err != nil {
+				if errors.Is(err, net.ErrClosed) {
+					break
+				} else {
+					continue
+				}
+			}
+			conn.Write([]byte(server.handleHttpRequest(conn)))
+			conn.Close()
+		}
+		listener.Close()
+	}()
+
+	return nil, port
+}
+
+// Here we are writing a simplistic HTTP server without using net/http
+// package to reduce the size of the binary.
+//
+// * No --listen:            2.8MB
+// * --listen with net/http: 5.7MB
+// * --listen w/o net/http:  3.3MB
+func (server *httpServer) handleHttpRequest(conn net.Conn) string {
+	contentLength := 0
+	apiKey := ""
+	body := ""
+	answer := func(code string, message string) string {
+		message += "\n"
+		return code + fmt.Sprintf("Content-Length: %d%s", len(message), crlf+crlf+message)
+	}
+	unauthorized := func(message string) string {
+		return answer(httpUnauthorized, message)
+	}
+	bad := func(message string) string {
+		return answer(httpBadRequest, message)
+	}
+	good := func(message string) string {
+		return answer(httpOk+jsonContentType, message)
+	}
+	conn.SetReadDeadline(time.Now().Add(httpReadTimeout))
+	scanner := bufio.NewScanner(conn)
+	scanner.Split(func(data []byte, atEOF bool) (int, []byte, error) {
+		found := bytes.Index(data, []byte(crlf))
+		if found >= 0 {
+			token := data[:found+len(crlf)]
+			return len(token), token, nil
+		}
+		if atEOF || len(body)+len(data) >= contentLength {
+			return 0, data, bufio.ErrFinalToken
+		}
+		return 0, nil, nil
+	})
+
+	section := 0
+	for scanner.Scan() {
+		text := scanner.Text()
+		switch section {
+		case 0:
+			getMatch := getRegex.FindStringSubmatch(text)
+			if len(getMatch) > 0 {
+				server.actionChannel <- []*action{{t: actResponse, a: getMatch[1]}}
+				select {
+				case response := <-server.responseChannel:
+					return good(response)
+				case <-time.After(2 * time.Second):
+					go func() {
+						// Drain the channel
+						<-server.responseChannel
+					}()
+					return answer(httpUnavailable+jsonContentType, `{"error":"timeout"}`)
+				}
+			} else if !strings.HasPrefix(text, "POST / HTTP") {
+				return bad("invalid request method")
+			}
+			section++
+		case 1:
+			if text == crlf {
+				if contentLength == 0 {
+					return bad("content-length header missing")
+				}
+				section++
+				continue
+			}
+			pair := strings.SplitN(text, ":", 2)
+			if len(pair) == 2 {
+				switch strings.ToLower(pair[0]) {
+				case "content-length":
+					length, err := strconv.Atoi(strings.TrimSpace(pair[1]))
+					if err != nil || length <= 0 || length > maxContentLength {
+						return bad("invalid content length")
+					}
+					contentLength = length
+				case "x-api-key":
+					apiKey = strings.TrimSpace(pair[1])
+				}
+			}
+		case 2:
+			body += text
+		}
+	}
+
+	if len(server.apiKey) != 0 && subtle.ConstantTimeCompare([]byte(apiKey), server.apiKey) != 1 {
+		return unauthorized("invalid api key")
+	}
+
+	if len(body) < contentLength {
+		return bad("incomplete request")
+	}
+	body = body[:contentLength]
+
+	errorMessage := ""
+	actions := parseSingleActionList(strings.Trim(string(body), "\r\n"), func(message string) {
+		errorMessage = message
+	})
+	if len(errorMessage) > 0 {
+		return bad(errorMessage)
+	}
+	if len(actions) == 0 {
+		return bad("no action specified")
+	}
+
+	server.actionChannel <- actions
+	return httpOk + crlf
+}
+
+func parseGetParams(query string) getParams {
+	params := getParams{limit: 100, offset: 0}
+	for _, pair := range strings.Split(query, "&") {
+		parts := strings.SplitN(pair, "=", 2)
+		if len(parts) == 2 {
+			switch parts[0] {
+			case "limit":
+				val, err := strconv.Atoi(parts[1])
+				if err == nil {
+					params.limit = val
+				}
+			case "offset":
+				val, err := strconv.Atoi(parts[1])
+				if err == nil {
+					params.offset = val
+				}
+			}
+		}
+	}
+	return params
+}

src/terminal_test.go

@@ -0,0 +1,656 @@
+package fzf
+
+import (
+	"bytes"
+	"io"
+	"os"
+	"regexp"
+	"strings"
+	"testing"
+	"text/template"
+
+	"github.com/junegunn/fzf/src/util"
+)
+
+func replacePlaceholderTest(template string, stripAnsi bool, delimiter Delimiter, printsep string, forcePlus bool, query string, allItems []*Item) string {
+	return replacePlaceholder(replacePlaceholderParams{
+		template:   template,
+		stripAnsi:  stripAnsi,
+		delimiter:  delimiter,
+		printsep:   printsep,
+		forcePlus:  forcePlus,
+		query:      query,
+		allItems:   allItems,
+		lastAction: actBackwardDeleteCharEof,
+		prompt:     "prompt",
+	})
+}
+
+func TestReplacePlaceholder(t *testing.T) {
+	item1 := newItem("  foo'bar \x1b[31mbaz\x1b[m")
+	items1 := []*Item{item1, item1}
+	items2 := []*Item{
+		newItem("foo'bar \x1b[31mbaz\x1b[m"),
+		newItem("foo'bar \x1b[31mbaz\x1b[m"),
+		newItem("FOO'BAR \x1b[31mBAZ\x1b[m")}
+
+	delim := "'"
+	var regex *regexp.Regexp
+
+	var result string
+	check := func(expected string) {
+		if result != expected {
+			t.Errorf("expected: %s, actual: %s", expected, result)
+		}
+	}
+	// helper function that converts template format into string and carries out the check()
+	checkFormat := func(format string) {
+		type quotes struct{ O, I, S string } // outer, inner quotes, print separator
+		unixStyle := quotes{`'`, `'\''`, "\n"}
+		windowsStyle := quotes{`^"`, `'`, "\n"}
+		var effectiveStyle quotes
+
+		if util.IsWindows() {
+			effectiveStyle = windowsStyle
+		} else {
+			effectiveStyle = unixStyle
+		}
+
+		expected := templateToString(format, effectiveStyle)
+		check(expected)
+	}
+	printsep := "\n"
+
+	/*
+		Test multiple placeholders and the function parameters.
+	*/
+
+	// {}, preserve ansi
+	result = replacePlaceholderTest("echo {}", false, Delimiter{}, printsep, false, "query", items1)
+	checkFormat("echo {{.O}}  foo{{.I}}bar \x1b[31mbaz\x1b[m{{.O}}")
+
+	// {}, strip ansi
+	result = replacePlaceholderTest("echo {}", true, Delimiter{}, printsep, false, "query", items1)
+	checkFormat("echo {{.O}}  foo{{.I}}bar baz{{.O}}")
+
+	// {}, with multiple items
+	result = replacePlaceholderTest("echo {}", true, Delimiter{}, printsep, false, "query", items2)
+	checkFormat("echo {{.O}}foo{{.I}}bar baz{{.O}}")
+
+	// {..}, strip leading whitespaces, preserve ansi
+	result = replacePlaceholderTest("echo {..}", false, Delimiter{}, printsep, false, "query", items1)
+	checkFormat("echo {{.O}}foo{{.I}}bar \x1b[31mbaz\x1b[m{{.O}}")
+
+	// {..}, strip leading whitespaces, strip ansi
+	result = replacePlaceholderTest("echo {..}", true, Delimiter{}, printsep, false, "query", items1)
+	checkFormat("echo {{.O}}foo{{.I}}bar baz{{.O}}")
+
+	// {q}
+	result = replacePlaceholderTest("echo {} {q}", true, Delimiter{}, printsep, false, "query", items1)
+	checkFormat("echo {{.O}}  foo{{.I}}bar baz{{.O}} {{.O}}query{{.O}}")
+
+	// {q}, multiple items
+	result = replacePlaceholderTest("echo {+}{q}{+}", true, Delimiter{}, printsep, false, "query 'string'", items2)
+	checkFormat("echo {{.O}}foo{{.I}}bar baz{{.O}} {{.O}}FOO{{.I}}BAR BAZ{{.O}}{{.O}}query {{.I}}string{{.I}}{{.O}}{{.O}}foo{{.I}}bar baz{{.O}} {{.O}}FOO{{.I}}BAR BAZ{{.O}}")
+
+	result = replacePlaceholderTest("echo {}{q}{}", true, Delimiter{}, printsep, false, "query 'string'", items2)
+	checkFormat("echo {{.O}}foo{{.I}}bar baz{{.O}}{{.O}}query {{.I}}string{{.I}}{{.O}}{{.O}}foo{{.I}}bar baz{{.O}}")
+
+	result = replacePlaceholderTest("echo {1}/{2}/{2,1}/{-1}/{-2}/{}/{..}/{n.t}/\\{}/\\{1}/\\{q}/{3}", true, Delimiter{}, printsep, false, "query", items1)
+	checkFormat("echo {{.O}}foo{{.I}}bar{{.O}}/{{.O}}baz{{.O}}/{{.O}}bazfoo{{.I}}bar{{.O}}/{{.O}}baz{{.O}}/{{.O}}foo{{.I}}bar{{.O}}/{{.O}}  foo{{.I}}bar baz{{.O}}/{{.O}}foo{{.I}}bar baz{{.O}}/{n.t}/{}/{1}/{q}/{{.O}}{{.O}}")
+
+	result = replacePlaceholderTest("echo {1}/{2}/{-1}/{-2}/{..}/{n.t}/\\{}/\\{1}/\\{q}/{3}", true, Delimiter{}, printsep, false, "query", items2)
+	checkFormat("echo {{.O}}foo{{.I}}bar{{.O}}/{{.O}}baz{{.O}}/{{.O}}baz{{.O}}/{{.O}}foo{{.I}}bar{{.O}}/{{.O}}foo{{.I}}bar baz{{.O}}/{n.t}/{}/{1}/{q}/{{.O}}{{.O}}")
+
+	result = replacePlaceholderTest("echo {+1}/{+2}/{+-1}/{+-2}/{+..}/{n.t}/\\{}/\\{1}/\\{q}/{+3}", true, Delimiter{}, printsep, false, "query", items2)
+	checkFormat("echo {{.O}}foo{{.I}}bar{{.O}} {{.O}}FOO{{.I}}BAR{{.O}}/{{.O}}baz{{.O}} {{.O}}BAZ{{.O}}/{{.O}}baz{{.O}} {{.O}}BAZ{{.O}}/{{.O}}foo{{.I}}bar{{.O}} {{.O}}FOO{{.I}}BAR{{.O}}/{{.O}}foo{{.I}}bar baz{{.O}} {{.O}}FOO{{.I}}BAR BAZ{{.O}}/{n.t}/{}/{1}/{q}/{{.O}}{{.O}} {{.O}}{{.O}}")
+
+	// forcePlus
+	result = replacePlaceholderTest("echo {1}/{2}/{-1}/{-2}/{..}/{n.t}/\\{}/\\{1}/\\{q}/{3}", true, Delimiter{}, printsep, true, "query", items2)
+	checkFormat("echo {{.O}}foo{{.I}}bar{{.O}} {{.O}}FOO{{.I}}BAR{{.O}}/{{.O}}baz{{.O}} {{.O}}BAZ{{.O}}/{{.O}}baz{{.O}} {{.O}}BAZ{{.O}}/{{.O}}foo{{.I}}bar{{.O}} {{.O}}FOO{{.I}}BAR{{.O}}/{{.O}}foo{{.I}}bar baz{{.O}} {{.O}}FOO{{.I}}BAR BAZ{{.O}}/{n.t}/{}/{1}/{q}/{{.O}}{{.O}} {{.O}}{{.O}}")
+
+	// Whitespace preserving flag with "'" delimiter
+	result = replacePlaceholderTest("echo {s1}", true, Delimiter{str: &delim}, printsep, false, "query", items1)
+	checkFormat("echo {{.O}}  foo{{.O}}")
+
+	result = replacePlaceholderTest("echo {s2}", true, Delimiter{str: &delim}, printsep, false, "query", items1)
+	checkFormat("echo {{.O}}bar baz{{.O}}")
+
+	result = replacePlaceholderTest("echo {s}", true, Delimiter{str: &delim}, printsep, false, "query", items1)
+	checkFormat("echo {{.O}}  foo{{.I}}bar baz{{.O}}")
+
+	result = replacePlaceholderTest("echo {s..}", true, Delimiter{str: &delim}, printsep, false, "query", items1)
+	checkFormat("echo {{.O}}  foo{{.I}}bar baz{{.O}}")
+
+	// Whitespace preserving flag with regex delimiter
+	regex = regexp.MustCompile(`\w+`)
+
+	result = replacePlaceholderTest("echo {s1}", true, Delimiter{regex: regex}, printsep, false, "query", items1)
+	checkFormat("echo {{.O}}  {{.O}}")
+
+	result = replacePlaceholderTest("echo {s2}", true, Delimiter{regex: regex}, printsep, false, "query", items1)
+	checkFormat("echo {{.O}}{{.I}}{{.O}}")
+
+	result = replacePlaceholderTest("echo {s3}", true, Delimiter{regex: regex}, printsep, false, "query", items1)
+	checkFormat("echo {{.O}} {{.O}}")
+
+	// No match
+	result = replacePlaceholderTest("echo {}/{+}", true, Delimiter{}, printsep, false, "query", []*Item{nil, nil})
+	check("echo /")
+
+	// No match, but with selections
+	result = replacePlaceholderTest("echo {}/{+}", true, Delimiter{}, printsep, false, "query", []*Item{nil, item1})
+	checkFormat("echo /{{.O}}  foo{{.I}}bar baz{{.O}}")
+
+	// String delimiter
+	result = replacePlaceholderTest("echo {}/{1}/{2}", true, Delimiter{str: &delim}, printsep, false, "query", items1)
+	checkFormat("echo {{.O}}  foo{{.I}}bar baz{{.O}}/{{.O}}foo{{.O}}/{{.O}}bar baz{{.O}}")
+
+	// Regex delimiter
+	regex = regexp.MustCompile("[oa]+")
+	// foo'bar baz
+	result = replacePlaceholderTest("echo {}/{1}/{3}/{2..3}", true, Delimiter{regex: regex}, printsep, false, "query", items1)
+	checkFormat("echo {{.O}}  foo{{.I}}bar baz{{.O}}/{{.O}}f{{.O}}/{{.O}}r b{{.O}}/{{.O}}{{.I}}bar b{{.O}}")
+
+	/*
+		Test single placeholders, but focus on the placeholders' parameters (e.g. flags).
+		see: TestParsePlaceholder
+	*/
+	items3 := []*Item{
+		// single line
+		newItem("1a 1b 1c 1d 1e 1f"),
+		// multi line
+		newItem("1a 1b 1c 1d 1e 1f"),
+		newItem("2a 2b 2c 2d 2e 2f"),
+		newItem("3a 3b 3c 3d 3e 3f"),
+		newItem("4a 4b 4c 4d 4e 4f"),
+		newItem("5a 5b 5c 5d 5e 5f"),
+		newItem("6a 6b 6c 6d 6e 6f"),
+		newItem("7a 7b 7c 7d 7e 7f"),
+	}
+	stripAnsi := false
+	forcePlus := false
+	query := "sample query"
+
+	templateToOutput := make(map[string]string)
+	templateToFile := make(map[string]string) // same as above, but the file contents will be matched
+	// I. item type placeholder
+	templateToOutput[`{}`] = `{{.O}}1a 1b 1c 1d 1e 1f{{.O}}`
+	templateToOutput[`{+}`] = `{{.O}}1a 1b 1c 1d 1e 1f{{.O}} {{.O}}2a 2b 2c 2d 2e 2f{{.O}} {{.O}}3a 3b 3c 3d 3e 3f{{.O}} {{.O}}4a 4b 4c 4d 4e 4f{{.O}} {{.O}}5a 5b 5c 5d 5e 5f{{.O}} {{.O}}6a 6b 6c 6d 6e 6f{{.O}} {{.O}}7a 7b 7c 7d 7e 7f{{.O}}`
+	templateToOutput[`{n}`] = `0`
+	templateToOutput[`{+n}`] = `0 0 0 0 0 0 0`
+	templateToFile[`{f}`] = `1a 1b 1c 1d 1e 1f{{.S}}`
+	templateToFile[`{+f}`] = `1a 1b 1c 1d 1e 1f{{.S}}2a 2b 2c 2d 2e 2f{{.S}}3a 3b 3c 3d 3e 3f{{.S}}4a 4b 4c 4d 4e 4f{{.S}}5a 5b 5c 5d 5e 5f{{.S}}6a 6b 6c 6d 6e 6f{{.S}}7a 7b 7c 7d 7e 7f{{.S}}`
+	templateToFile[`{nf}`] = `0{{.S}}`
+	templateToFile[`{+nf}`] = `0{{.S}}0{{.S}}0{{.S}}0{{.S}}0{{.S}}0{{.S}}0{{.S}}`
+
+	// II. token type placeholders
+	templateToOutput[`{..}`] = templateToOutput[`{}`]
+	templateToOutput[`{1..}`] = templateToOutput[`{}`]
+	templateToOutput[`{..2}`] = `{{.O}}1a 1b{{.O}}`
+	templateToOutput[`{1..2}`] = templateToOutput[`{..2}`]
+	templateToOutput[`{-2..-1}`] = `{{.O}}1e 1f{{.O}}`
+	// shorthand for x..x range
+	templateToOutput[`{1}`] = `{{.O}}1a{{.O}}`
+	templateToOutput[`{1..1}`] = templateToOutput[`{1}`]
+	templateToOutput[`{-6}`] = templateToOutput[`{1}`]
+	// multiple ranges
+	templateToOutput[`{1,2}`] = templateToOutput[`{1..2}`]
+	templateToOutput[`{1,2,4}`] = `{{.O}}1a 1b 1d{{.O}}`
+	templateToOutput[`{1,2..4}`] = `{{.O}}1a 1b 1c 1d{{.O}}`
+	templateToOutput[`{1..2,-4..-3}`] = `{{.O}}1a 1b 1c 1d{{.O}}`
+	// flags
+	templateToOutput[`{+1}`] = `{{.O}}1a{{.O}} {{.O}}2a{{.O}} {{.O}}3a{{.O}} {{.O}}4a{{.O}} {{.O}}5a{{.O}} {{.O}}6a{{.O}} {{.O}}7a{{.O}}`
+	templateToOutput[`{+-1}`] = `{{.O}}1f{{.O}} {{.O}}2f{{.O}} {{.O}}3f{{.O}} {{.O}}4f{{.O}} {{.O}}5f{{.O}} {{.O}}6f{{.O}} {{.O}}7f{{.O}}`
+	templateToOutput[`{s1}`] = `{{.O}}1a {{.O}}`
+	templateToFile[`{f1}`] = `1a{{.S}}`
+	templateToOutput[`{+s1..2}`] = `{{.O}}1a 1b {{.O}} {{.O}}2a 2b {{.O}} {{.O}}3a 3b {{.O}} {{.O}}4a 4b {{.O}} {{.O}}5a 5b {{.O}} {{.O}}6a 6b {{.O}} {{.O}}7a 7b {{.O}}`
+	templateToFile[`{+sf1..2}`] = `1a 1b {{.S}}2a 2b {{.S}}3a 3b {{.S}}4a 4b {{.S}}5a 5b {{.S}}6a 6b {{.S}}7a 7b {{.S}}`
+
+	// III. query type placeholder
+	// query flag is not removed after parsing, so it gets doubled
+	// while the double q is invalid, it is useful here for testing purposes
+	templateToOutput[`{q}`] = "{{.O}}" + query + "{{.O}}"
+	templateToOutput[`{fzf:query}`] = "{{.O}}" + query + "{{.O}}"
+	templateToOutput[`{fzf:action} {fzf:prompt}`] = "backward-delete-char-eof 'prompt'"
+
+	// IV. escaping placeholder
+	templateToOutput[`\{}`] = `{}`
+	templateToOutput[`\{q}`] = `{q}`
+	templateToOutput[`\{fzf:query}`] = `{fzf:query}`
+	templateToOutput[`\{fzf:action}`] = `{fzf:action}`
+	templateToOutput[`\{++}`] = `{++}`
+	templateToOutput[`{++}`] = templateToOutput[`{+}`]
+
+	for giveTemplate, wantOutput := range templateToOutput {
+		result = replacePlaceholderTest(giveTemplate, stripAnsi, Delimiter{}, printsep, forcePlus, query, items3)
+		checkFormat(wantOutput)
+	}
+	for giveTemplate, wantOutput := range templateToFile {
+		path := replacePlaceholderTest(giveTemplate, stripAnsi, Delimiter{}, printsep, forcePlus, query, items3)
+
+		data, err := readFile(path)
+		if err != nil {
+			t.Errorf("Cannot read the content of the temp file %s.", path)
+		}
+		result = string(data)
+
+		checkFormat(wantOutput)
+	}
+}
+
+func TestQuoteEntry(t *testing.T) {
+	type quotes struct{ E, O, SQ, DQ, BS string } // standalone escape, outer, single and double quotes, backslash
+	unixStyle := quotes{``, `'`, `'\''`, `"`, `\`}
+	windowsStyle := quotes{`^`, `^"`, `'`, `\^"`, `\\`}
+	var effectiveStyle quotes
+
+	if util.IsWindows() {
+		effectiveStyle = windowsStyle
+	} else {
+		effectiveStyle = unixStyle
+	}
+
+	tests := map[string]string{
+		`'`:     `{{.O}}{{.SQ}}{{.O}}`,
+		`"`:     `{{.O}}{{.DQ}}{{.O}}`,
+		`\`:     `{{.O}}{{.BS}}{{.O}}`,
+		`\"`:    `{{.O}}{{.BS}}{{.DQ}}{{.O}}`,
+		`"\\\"`: `{{.O}}{{.DQ}}{{.BS}}{{.BS}}{{.BS}}{{.DQ}}{{.O}}`,
+
+		`$`:       `{{.O}}${{.O}}`,
+		`$HOME`:   `{{.O}}$HOME{{.O}}`,
+		`'$HOME'`: `{{.O}}{{.SQ}}$HOME{{.SQ}}{{.O}}`,
+
+		`&`:                       `{{.O}}{{.E}}&{{.O}}`,
+		`|`:                       `{{.O}}{{.E}}|{{.O}}`,
+		`<`:                       `{{.O}}{{.E}}<{{.O}}`,
+		`>`:                       `{{.O}}{{.E}}>{{.O}}`,
+		`(`:                       `{{.O}}{{.E}}({{.O}}`,
+		`)`:                       `{{.O}}{{.E}}){{.O}}`,
+		`@`:                       `{{.O}}{{.E}}@{{.O}}`,
+		`^`:                       `{{.O}}{{.E}}^{{.O}}`,
+		`%`:                       `{{.O}}{{.E}}%{{.O}}`,
+		`!`:                       `{{.O}}{{.E}}!{{.O}}`,
+		`%USERPROFILE%`:           `{{.O}}{{.E}}%USERPROFILE{{.E}}%{{.O}}`,
+		`C:\Program Files (x86)\`: `{{.O}}C:{{.BS}}Program Files {{.E}}(x86{{.E}}){{.BS}}{{.O}}`,
+		`"C:\Program Files"`:      `{{.O}}{{.DQ}}C:{{.BS}}Program Files{{.DQ}}{{.O}}`,
+	}
+
+	for input, expected := range tests {
+		escaped := quoteEntry(input)
+		expected = templateToString(expected, effectiveStyle)
+		if escaped != expected {
+			t.Errorf("Input: %s, expected: %s, actual %s", input, expected, escaped)
+		}
+	}
+}
+
+// purpose of this test is to demonstrate some shortcomings of fzf's templating system on Unix
+func TestUnixCommands(t *testing.T) {
+	if util.IsWindows() {
+		t.SkipNow()
+	}
+	tests := []testCase{
+		// reference: give{template, query, items}, want{output OR match}
+
+		// 1) working examples
+
+		// paths that does not have to evaluated will work fine, when quoted
+		{give{`grep foo {}`, ``, newItems(`test`)}, want{output: `grep foo 'test'`}},
+		{give{`grep foo {}`, ``, newItems(`/home/user/test`)}, want{output: `grep foo '/home/user/test'`}},
+		{give{`grep foo {}`, ``, newItems(`./test`)}, want{output: `grep foo './test'`}},
+
+		// only placeholders are escaped as data, this will lookup tilde character in a test file in your home directory
+		// quoting the tilde is required (to be treated as string)
+		{give{`grep {} ~/test`, ``, newItems(`~`)}, want{output: `grep '~' ~/test`}},
+
+		// 2) problematic examples
+		// (not necessarily unexpected)
+
+		// paths that need to expand some part of it won't work (special characters and variables)
+		{give{`cat {}`, ``, newItems(`~/test`)}, want{output: `cat '~/test'`}},
+		{give{`cat {}`, ``, newItems(`$HOME/test`)}, want{output: `cat '$HOME/test'`}},
+	}
+	testCommands(t, tests)
+}
+
+// purpose of this test is to demonstrate some shortcomings of fzf's templating system on Windows
+func TestWindowsCommands(t *testing.T) {
+	if !util.IsWindows() {
+		t.SkipNow()
+	}
+	tests := []testCase{
+		// reference: give{template, query, items}, want{output OR match}
+
+		// 1) working examples
+
+		// example of redundantly escaped backslash in the output, besides looking bit ugly, it won't cause any issue
+		{give{`type {}`, ``, newItems(`C:\test.txt`)}, want{output: `type ^"C:\\test.txt^"`}},
+		{give{`rg -- "package" {}`, ``, newItems(`.\test.go`)}, want{output: `rg -- "package" ^".\\test.go^"`}},
+		// example of mandatorily escaped backslash in the output, otherwise `rg -- "C:\test.txt"` is matching for tabulator
+		{give{`rg -- {}`, ``, newItems(`C:\test.txt`)}, want{output: `rg -- ^"C:\\test.txt^"`}},
+		// example of mandatorily escaped double quote in the output, otherwise `rg -- ""C:\\test.txt""` is not matching for the double quotes around the path
+		{give{`rg -- {}`, ``, newItems(`"C:\test.txt"`)}, want{output: `rg -- ^"\^"C:\\test.txt\^"^"`}},
+
+		// 2) problematic examples
+		// (not necessarily unexpected)
+
+		// notepad++'s parser can't handle `-n"12"` generate by fzf, expects `-n12`
+		{give{`notepad++ -n{1} {2}`, ``, newItems(`12	C:\Work\Test Folder\File.txt`)}, want{output: `notepad++ -n^"12^" ^"C:\\Work\\Test Folder\\File.txt^"`}},
+
+		// cat is parsing `\"` as a part of the file path, double quote is illegal character for paths on Windows
+		// cat: "C:\\test.txt: Invalid argument
+		{give{`cat {}`, ``, newItems(`"C:\test.txt"`)}, want{output: `cat ^"\^"C:\\test.txt\^"^"`}},
+		// cat: "C:\\test.txt": Invalid argument
+		{give{`cmd /c {}`, ``, newItems(`cat "C:\test.txt"`)}, want{output: `cmd /c ^"cat \^"C:\\test.txt\^"^"`}},
+
+		// the "file" flag in the pattern won't create *.bat or *.cmd file so the command in the output tries to edit the file, instead of executing it
+		// the temp file contains: `cat "C:\test.txt"`
+		// TODO this should actually work
+		{give{`cmd /c {f}`, ``, newItems(`cat "C:\test.txt"`)}, want{match: `^cmd /c .*\fzf-preview-[0-9]{9}$`}},
+	}
+	testCommands(t, tests)
+}
+
+// purpose of this test is to demonstrate some shortcomings of fzf's templating system on Windows in Powershell
+func TestPowershellCommands(t *testing.T) {
+	if !util.IsWindows() {
+		t.SkipNow()
+	}
+
+	tests := []testCase{
+		// reference: give{template, query, items}, want{output OR match}
+
+		/*
+			You can read each line in the following table as a pipeline that
+			consist of series of parsers that act upon your input (col. 1) and
+			each cell represents the output value.
+
+			For example:
+			 - exec.Command("program.exe", `\''`)
+			   - goes to win32 api which will process it transparently as it contains no special characters, see [CommandLineToArgvW][].
+			     - powershell command will receive it as is, that is two arguments: a literal backslash and empty string in single quotes
+			     - native command run via/from powershell will receive only one argument: a literal backslash. Because extra parsing rules apply, see [NativeCallsFromPowershell][].
+			       - some¹ apps have internal parser, that requires one more level of escaping (yes, this is completely application-specific, but see terminal_test.go#TestWindowsCommands)
+
+			Character⁰   CommandLineToArgvW   Powershell commands              Native commands from Powershell   Apps requiring escapes¹    | Being tested below
+			----------   ------------------   ------------------------------   -------------------------------   -------------------------- | ------------------
+			"            empty string²        missing argument error           ...                               ...                        |
+			\"           literal "            unbalanced quote error           ...                               ...                        |
+			'\"'         literal '"'          literal "                        empty string                      empty string (match all)   | yes
+			'\\\"'       literal '\"'         literal \"                       literal "                         literal "                  |
+			----------   ------------------   ------------------------------   -------------------------------   -------------------------- | ------------------
+			\            transparent          transparent                      transparent                       regex error                |
+			'\'          transparent          literal \                        literal \                         regex error                | yes
+			\\           transparent          transparent                      transparent                       literal \                  |
+			'\\'         transparent          literal \\                       literal \\                        literal \                  |
+			----------   ------------------   ------------------------------   -------------------------------   -------------------------- | ------------------
+			'            transparent          unbalanced quote error           ...                               ...                        |
+			\'           transparent          literal \ and unb. quote error   ...                               ...                        |
+			\''          transparent          literal \ and empty string       literal \                         regex error                | no, but given as example above
+			'''          transparent          unbalanced quote error           ...                               ...                        |
+			''''         transparent          literal '                        literal '                         literal '                  | yes
+			----------   ------------------   ------------------------------   -------------------------------   -------------------------- | ------------------
+
+			⁰: charatecter or characters 'x' as an argument to a program in go's call: exec.Command("program.exe", `x`)
+			¹: native commands like grep, git grep, ripgrep
+			²: interpreted as a grouping quote, affects argument parser and gets removed from the result
+
+			[CommandLineToArgvW]: https://docs.microsoft.com/en-gb/windows/win32/api/shellapi/nf-shellapi-commandlinetoargvw#remarks
+			[NativeCallsFromPowershell]: https://docs.microsoft.com/en-us/powershell/module/microsoft.powershell.core/about/about_parsing?view=powershell-7.1#passing-arguments-that-contain-quote-characters
+		*/
+
+		// 1) working examples
+
+		{give{`Get-Content {}`, ``, newItems(`C:\test.txt`)}, want{output: `Get-Content 'C:\test.txt'`}},
+		{give{`rg -- "package" {}`, ``, newItems(`.\test.go`)}, want{output: `rg -- "package" '.\test.go'`}},
+
+		// example of escaping single quotes
+		{give{`rg -- {}`, ``, newItems(`'foobar'`)}, want{output: `rg -- '''foobar'''`}},
+
+		// chaining powershells
+		{give{`powershell -NoProfile -Command {}`, ``, newItems(`cat "C:\test.txt"`)}, want{output: `powershell -NoProfile -Command 'cat \"C:\test.txt\"'`}},
+
+		// 2) problematic examples
+		// (not necessarily unexpected)
+
+		// looking for a path string will only work with escaped backslashes
+		{give{`rg -- {}`, ``, newItems(`C:\test.txt`)}, want{output: `rg -- 'C:\test.txt'`}},
+		// looking for a literal double quote will only work with triple escaped double quotes
+		{give{`rg -- {}`, ``, newItems(`"C:\test.txt"`)}, want{output: `rg -- '\"C:\test.txt\"'`}},
+
+		// Get-Content (i.e. cat alias) is parsing `"` as a part of the file path, returns an error:
+		// Get-Content : Cannot find drive. A drive with the name '"C:' does not exist.
+		{give{`cat {}`, ``, newItems(`"C:\test.txt"`)}, want{output: `cat '\"C:\test.txt\"'`}},
+
+		// the "file" flag in the pattern won't create *.ps1 file so the powershell will offload this "unknown" filetype
+		// to explorer, which will prompt user to pick editing program for the fzf-preview file
+		// the temp file contains: `cat "C:\test.txt"`
+		// TODO this should actually work
+		{give{`powershell -NoProfile -Command {f}`, ``, newItems(`cat "C:\test.txt"`)}, want{match: `^powershell -NoProfile -Command .*\fzf-preview-[0-9]{9}$`}},
+	}
+
+	// to force powershell-style escaping we temporarily set environment variable that fzf honors
+	shellBackup := os.Getenv("SHELL")
+	os.Setenv("SHELL", "powershell")
+	testCommands(t, tests)
+	os.Setenv("SHELL", shellBackup)
+}
+
+/*
+Test typical valid placeholders and parsing of them.
+
+Also since the parser assumes the input is matched with `placeholder` regex,
+the regex is tested here as well.
+*/
+func TestParsePlaceholder(t *testing.T) {
+	// give, want pairs
+	templates := map[string]string{
+		// I. item type placeholder
+		`{}`:    `{}`,
+		`{+}`:   `{+}`,
+		`{n}`:   `{n}`,
+		`{+n}`:  `{+n}`,
+		`{f}`:   `{f}`,
+		`{+nf}`: `{+nf}`,
+
+		// II. token type placeholders
+		`{..}`:     `{..}`,
+		`{1..}`:    `{1..}`,
+		`{..2}`:    `{..2}`,
+		`{1..2}`:   `{1..2}`,
+		`{-2..-1}`: `{-2..-1}`,
+		// shorthand for x..x range
+		`{1}`:    `{1}`,
+		`{1..1}`: `{1..1}`,
+		`{-6}`:   `{-6}`,
+		// multiple ranges
+		`{1,2}`:         `{1,2}`,
+		`{1,2,4}`:       `{1,2,4}`,
+		`{1,2..4}`:      `{1,2..4}`,
+		`{1..2,-4..-3}`: `{1..2,-4..-3}`,
+		// flags
+		`{+1}`:      `{+1}`,
+		`{+-1}`:     `{+-1}`,
+		`{s1}`:      `{s1}`,
+		`{f1}`:      `{f1}`,
+		`{+s1..2}`:  `{+s1..2}`,
+		`{+sf1..2}`: `{+sf1..2}`,
+
+		// III. query type placeholder
+		// query flag is not removed after parsing, so it gets doubled
+		// while the double q is invalid, it is useful here for testing purposes
+		`{q}`: `{qq}`,
+
+		// IV. escaping placeholder
+		`\{}`:   `{}`,
+		`\{++}`: `{++}`,
+		`{++}`:  `{+}`,
+	}
+
+	for giveTemplate, wantTemplate := range templates {
+		if !placeholder.MatchString(giveTemplate) {
+			t.Errorf(`given placeholder %s does not match placeholder regex, so attempt to parse it is unexpected`, giveTemplate)
+			continue
+		}
+
+		_, placeholderWithoutFlags, flags := parsePlaceholder(giveTemplate)
+		gotTemplate := placeholderWithoutFlags[:1] + flags.encodePlaceholder() + placeholderWithoutFlags[1:]
+
+		if gotTemplate != wantTemplate {
+			t.Errorf(`parsed placeholder "%s" into "%s", but want "%s"`, giveTemplate, gotTemplate, wantTemplate)
+		}
+	}
+}
+
+/* utilities section */
+
+// Item represents one line in fzf UI. Usually it is relative path to files and folders.
+func newItem(str string) *Item {
+	bytes := []byte(str)
+	trimmed, _, _ := extractColor(str, nil, nil)
+	return &Item{origText: &bytes, text: util.ToChars([]byte(trimmed))}
+}
+
+// Functions tested in this file require array of items (allItems). The array needs
+// to consist of at least two nils. This is helper function.
+func newItems(str ...string) []*Item {
+	result := make([]*Item, util.Max(len(str), 2))
+	for i, s := range str {
+		result[i] = newItem(s)
+	}
+	return result
+}
+
+// (for logging purposes)
+func (item *Item) String() string {
+	return item.AsString(true)
+}
+
+// Helper function to parse, execute and convert "text/template" to string. Panics on error.
+func templateToString(format string, data interface{}) string {
+	bb := &bytes.Buffer{}
+
+	err := template.Must(template.New("").Parse(format)).Execute(bb, data)
+	if err != nil {
+		panic(err)
+	}
+
+	return bb.String()
+}
+
+// ad hoc types for test cases
+type give struct {
+	template string
+	query    string
+	allItems []*Item
+}
+type want struct {
+	/*
+		Unix:
+		The `want.output` string is supposed to be formatted for evaluation by
+		`sh -c command` system call.
+
+		Windows:
+		The `want.output` string is supposed to be formatted for evaluation by
+		`cmd.exe /s /c "command"` system call. The `/s` switch enables so called old
+		behaviour, which is more favourable for nesting (possibly escaped)
+		special characters. This is the relevant section of `help cmd`:
+
+		...old behavior is to see if the first character is
+		a quote character and if so, strip the leading character and
+		remove the last quote character on the command line, preserving
+		any text after the last quote character.
+	*/
+	output string // literal output
+	match  string // output is matched against this regex (when output is empty string)
+}
+type testCase struct {
+	give
+	want
+}
+
+func testCommands(t *testing.T, tests []testCase) {
+	// common test parameters
+	delim := "\t"
+	delimiter := Delimiter{str: &delim}
+	printsep := ""
+	stripAnsi := false
+	forcePlus := false
+
+	// evaluate the test cases
+	for idx, test := range tests {
+		gotOutput := replacePlaceholderTest(
+			test.give.template, stripAnsi, delimiter, printsep, forcePlus,
+			test.give.query,
+			test.give.allItems)
+		switch {
+		case test.want.output != "":
+			if gotOutput != test.want.output {
+				t.Errorf("tests[%v]:\ngave{\n\ttemplate: '%s',\n\tquery: '%s',\n\tallItems: %s}\nand got '%s',\nbut want '%s'",
+					idx,
+					test.give.template, test.give.query, test.give.allItems,
+					gotOutput, test.want.output)
+			}
+		case test.want.match != "":
+			wantMatch := strings.ReplaceAll(test.want.match, `\`, `\\`)
+			wantRegex := regexp.MustCompile(wantMatch)
+			if !wantRegex.MatchString(gotOutput) {
+				t.Errorf("tests[%v]:\ngave{\n\ttemplate: '%s',\n\tquery: '%s',\n\tallItems: %s}\nand got '%s',\nbut want '%s'",
+					idx,
+					test.give.template, test.give.query, test.give.allItems,
+					gotOutput, test.want.match)
+			}
+		default:
+			t.Errorf("tests[%v]: test case does not describe 'want' property", idx)
+		}
+	}
+}
+
+// naive encoder of placeholder flags
+func (flags placeholderFlags) encodePlaceholder() string {
+	encoded := ""
+	if flags.plus {
+		encoded += "+"
+	}
+	if flags.preserveSpace {
+		encoded += "s"
+	}
+	if flags.number {
+		encoded += "n"
+	}
+	if flags.file {
+		encoded += "f"
+	}
+	if flags.forceUpdate { // FIXME
+		encoded += "q"
+	}
+	return encoded
+}
+
+// can be replaced with os.ReadFile() in go 1.16+
+func readFile(path string) ([]byte, error) {
+	file, err := os.Open(path)
+	if err != nil {
+		return nil, err
+	}
+	defer file.Close()
+
+	data := make([]byte, 0, 128)
+	for {
+		if len(data) >= cap(data) {
+			d := append(data[:cap(data)], 0)
+			data = d[:len(data)]
+		}
+
+		n, err := file.Read(data[len(data):cap(data)])
+		data = data[:len(data)+n]
+		if err != nil {
+			if err == io.EOF {
+				err = nil
+			}
+			return data, err
+		}
+	}
+}

src/terminal_unix.go

@@ -0,0 +1,47 @@
+//go:build !windows
+
+package fzf
+
+import (
+	"os"
+	"os/signal"
+	"strings"
+	"syscall"
+
+	"golang.org/x/sys/unix"
+)
+
+var escaper *strings.Replacer
+
+func init() {
+	tokens := strings.Split(os.Getenv("SHELL"), "/")
+	if tokens[len(tokens)-1] == "fish" {
+		// https://fishshell.com/docs/current/language.html#quotes
+		// > The only meaningful escape sequences in single quotes are \', which
+		// > escapes a single quote and \\, which escapes the backslash symbol.
+		escaper = strings.NewReplacer("\\", "\\\\", "'", "\\'")
+	} else {
+		escaper = strings.NewReplacer("'", "'\\''")
+	}
+}
+
+func notifyOnResize(resizeChan chan<- os.Signal) {
+	signal.Notify(resizeChan, syscall.SIGWINCH)
+}
+
+func notifyStop(p *os.Process) {
+	pid := p.Pid
+	pgid, err := unix.Getpgid(pid)
+	if err == nil {
+		pid = pgid * -1
+	}
+	unix.Kill(pid, syscall.SIGSTOP)
+}
+
+func notifyOnCont(resizeChan chan<- os.Signal) {
+	signal.Notify(resizeChan, syscall.SIGCONT)
+}
+
+func quoteEntry(entry string) string {
+	return "'" + escaper.Replace(entry) + "'"
+}

src/terminal_windows.go

@@ -0,0 +1,45 @@
+//go:build windows
+
+package fzf
+
+import (
+	"os"
+	"regexp"
+	"strings"
+)
+
+func notifyOnResize(resizeChan chan<- os.Signal) {
+	// TODO
+}
+
+func notifyStop(p *os.Process) {
+	// NOOP
+}
+
+func notifyOnCont(resizeChan chan<- os.Signal) {
+	// NOOP
+}
+
+func quoteEntry(entry string) string {
+	shell := os.Getenv("SHELL")
+	if len(shell) == 0 {
+		shell = "cmd"
+	}
+
+	if strings.Contains(shell, "cmd") {
+		// backslash escaping is done here for applications
+		// (see ripgrep test case in terminal_test.go#TestWindowsCommands)
+		escaped := strings.Replace(entry, `\`, `\\`, -1)
+		escaped = `"` + strings.Replace(escaped, `"`, `\"`, -1) + `"`
+		// caret is the escape character for cmd shell
+		r, _ := regexp.Compile(`[&|<>()@^%!"]`)
+		return r.ReplaceAllStringFunc(escaped, func(match string) string {
+			return "^" + match
+		})
+	} else if strings.Contains(shell, "pwsh") || strings.Contains(shell, "powershell") {
+		escaped := strings.Replace(entry, `"`, `\"`, -1)
+		return "'" + strings.Replace(escaped, "'", "''", -1) + "'"
+	} else {
+		return "'" + strings.Replace(entry, "'", "'\\''", -1) + "'"
+	}
+}

src/tokenizer.go

@@ -1,6 +1,8 @@
 package fzf
 
 import (
+	"bytes"
+	"fmt"
 	"regexp"
 	"strconv"
 	"strings"
@@ -18,9 +20,13 @@ type Range struct {
 
 // Token contains the tokenized part of the strings and its prefix length
 type Token struct {
-	text         []rune
-	prefixLength int
-	trimLength   int
+	text         *util.Chars
+	prefixLength int32
+}
+
+// String returns the string representation of a Token.
+func (t Token) String() string {
+	return fmt.Sprintf("Token{text: %s, prefixLength: %d}", t.text, t.prefixLength)
 }
 
 // Delimiter for tokenizing the input
@@ -29,6 +35,11 @@ type Delimiter struct {
 	str   *string
 }
 
+// String returns the string representation of a Delimiter.
+func (d Delimiter) String() string {
+	return fmt.Sprintf("Delimiter{regex: %v, str: &%q}", d.regex, *d.str)
+}
+
 func newRange(begin int, end int) Range {
 	if begin == 1 {
 		begin = rangeEllipsis
@@ -75,15 +86,14 @@ func ParseRange(str *string) (Range, bool) {
 	return newRange(n, n), true
 }
 
-func withPrefixLengths(tokens [][]rune, begin int) []Token {
+func withPrefixLengths(tokens []string, begin int) []Token {
 	ret := make([]Token, len(tokens))
 
 	prefixLength := begin
-	for idx, token := range tokens {
-		// Need to define a new local variable instead of the reused token to take
-		// the pointer to it
-		ret[idx] = Token{token, prefixLength, util.TrimLen(token)}
-		prefixLength += len(token)
+	for idx := range tokens {
+		chars := util.ToChars([]byte(tokens[idx]))
+		ret[idx] = Token{&chars, int32(prefixLength)}
+		prefixLength += chars.Length()
 	}
 	return ret
 }
@@ -94,90 +104,77 @@ const (
 	awkWhite
 )
 
-func awkTokenizer(input []rune) ([][]rune, int) {
+func awkTokenizer(input string) ([]string, int) {
 	// 9, 32
-	ret := [][]rune{}
-	str := []rune{}
+	ret := []string{}
 	prefixLength := 0
 	state := awkNil
-	for _, r := range input {
+	begin := 0
+	end := 0
+	for idx := 0; idx < len(input); idx++ {
+		r := input[idx]
 		white := r == 9 || r == 32
 		switch state {
 		case awkNil:
 			if white {
 				prefixLength++
 			} else {
-				state = awkBlack
-				str = append(str, r)
+				state, begin, end = awkBlack, idx, idx+1
 			}
 		case awkBlack:
-			str = append(str, r)
+			end = idx + 1
 			if white {
 				state = awkWhite
 			}
 		case awkWhite:
 			if white {
-				str = append(str, r)
+				end = idx + 1
 			} else {
-				ret = append(ret, str)
-				state = awkBlack
-				str = []rune{r}
+				ret = append(ret, input[begin:end])
+				state, begin, end = awkBlack, idx, idx+1
 			}
 		}
 	}
-	if len(str) > 0 {
-		ret = append(ret, str)
+	if begin < end {
+		ret = append(ret, input[begin:end])
 	}
 	return ret, prefixLength
 }
 
 // Tokenize tokenizes the given string with the delimiter
-func Tokenize(runes []rune, delimiter Delimiter) []Token {
+func Tokenize(text string, delimiter Delimiter) []Token {
 	if delimiter.str == nil && delimiter.regex == nil {
 		// AWK-style (\S+\s*)
-		tokens, prefixLength := awkTokenizer(runes)
+		tokens, prefixLength := awkTokenizer(text)
 		return withPrefixLengths(tokens, prefixLength)
 	}
 
-	var tokens []string
 	if delimiter.str != nil {
-		tokens = strings.Split(string(runes), *delimiter.str)
-		for i := 0; i < len(tokens)-1; i++ {
-			tokens[i] = tokens[i] + *delimiter.str
+		return withPrefixLengths(strings.SplitAfter(text, *delimiter.str), 0)
+	}
+
+	// FIXME performance
+	var tokens []string
+	if delimiter.regex != nil {
+		locs := delimiter.regex.FindAllStringIndex(text, -1)
+		begin := 0
+		for _, loc := range locs {
+			tokens = append(tokens, text[begin:loc[1]])
+			begin = loc[1]
 		}
-	} else if delimiter.regex != nil {
-		str := string(runes)
-		for len(str) > 0 {
-			loc := delimiter.regex.FindStringIndex(str)
-			if loc == nil {
-				loc = []int{0, len(str)}
-			}
-			last := util.Max(loc[1], 1)
-			tokens = append(tokens, str[:last])
-			str = str[last:]
+		if begin < len(text) {
+			tokens = append(tokens, text[begin:])
 		}
 	}
-	asRunes := make([][]rune, len(tokens))
-	for i, token := range tokens {
-		asRunes[i] = []rune(token)
-	}
-	return withPrefixLengths(asRunes, 0)
+	return withPrefixLengths(tokens, 0)
 }
 
-func joinTokens(tokens []Token) []rune {
-	ret := []rune{}
+func joinTokens(tokens []Token) string {
+	var output bytes.Buffer
 	for _, token := range tokens {
-		ret = append(ret, token.text...)
+		output.WriteString(token.text.ToString())
 	}
-	return ret
-}
-
-func joinTokensAsRunes(tokens []Token) []rune {
-	ret := []rune{}
-	for _, token := range tokens {
-		ret = append(ret, token.text...)
-	}
-	return ret
+	return output.String()
 }
 
 // Transform is used to transform the input when --with-nth option is given
@@ -185,19 +182,20 @@ func Transform(tokens []Token, withNth []Range) []Token {
 	transTokens := make([]Token, len(withNth))
 	numTokens := len(tokens)
 	for idx, r := range withNth {
-		part := []rune{}
+		parts := []*util.Chars{}
 		minIdx := 0
 		if r.begin == r.end {
 			idx := r.begin
 			if idx == rangeEllipsis {
-				part = append(part, joinTokensAsRunes(tokens)...)
+				chars := util.ToChars([]byte(joinTokens(tokens)))
+				parts = append(parts, &chars)
 			} else {
 				if idx < 0 {
 					idx += numTokens + 1
 				}
 				if idx >= 1 && idx <= numTokens {
 					minIdx = idx - 1
-					part = append(part, tokens[idx-1].text...)
+					parts = append(parts, tokens[idx-1].text)
 				}
 			}
 		} else {
@@ -224,17 +222,32 @@ func Transform(tokens []Token, withNth []Range) []Token {
 			minIdx = util.Max(0, begin-1)
 			for idx := begin; idx <= end; idx++ {
 				if idx >= 1 && idx <= numTokens {
-					part = append(part, tokens[idx-1].text...)
+					parts = append(parts, tokens[idx-1].text)
 				}
 			}
 		}
-		var prefixLength int
+		// Merge multiple parts
+		var merged util.Chars
+		switch len(parts) {
+		case 0:
+			merged = util.ToChars([]byte{})
+		case 1:
+			merged = *parts[0]
+		default:
+			var output bytes.Buffer
+			for _, part := range parts {
+				output.WriteString(part.ToString())
+			}
+			merged = util.ToChars(output.Bytes())
+		}
+
+		var prefixLength int32
 		if minIdx < numTokens {
 			prefixLength = tokens[minIdx].prefixLength
 		} else {
 			prefixLength = 0
 		}
-		transTokens[idx] = Token{part, prefixLength, util.TrimLen(part)}
+		transTokens[idx] = Token{&merged, prefixLength}
 	}
 	return transTokens
 }

src/tokenizer_test.go

@@ -1,41 +1,43 @@
 package fzf
 
-import "testing"
+import (
+	"testing"
+)
 
 func TestParseRange(t *testing.T) {
 	{
 		i := ".."
 		r, _ := ParseRange(&i)
 		if r.begin != rangeEllipsis || r.end != rangeEllipsis {
-			t.Errorf("%s", r)
+			t.Errorf("%v", r)
 		}
 	}
 	{
 		i := "3.."
 		r, _ := ParseRange(&i)
 		if r.begin != 3 || r.end != rangeEllipsis {
-			t.Errorf("%s", r)
+			t.Errorf("%v", r)
 		}
 	}
 	{
 		i := "3..5"
 		r, _ := ParseRange(&i)
 		if r.begin != 3 || r.end != 5 {
-			t.Errorf("%s", r)
+			t.Errorf("%v", r)
 		}
 	}
 	{
 		i := "-3..-5"
 		r, _ := ParseRange(&i)
 		if r.begin != -3 || r.end != -5 {
-			t.Errorf("%s", r)
+			t.Errorf("%v", r)
 		}
 	}
 	{
 		i := "3"
 		r, _ := ParseRange(&i)
 		if r.begin != 3 || r.end != 3 {
-			t.Errorf("%s", r)
+			t.Errorf("%v", r)
 		}
 	}
 }
@@ -43,23 +45,23 @@ func TestParseRange(t *testing.T) {
 func TestTokenize(t *testing.T) {
 	// AWK-style
 	input := "  abc:  def:  ghi  "
-	tokens := Tokenize([]rune(input), Delimiter{})
-	if string(tokens[0].text) != "abc:  " || tokens[0].prefixLength != 2 || tokens[0].trimLength != 4 {
+	tokens := Tokenize(input, Delimiter{})
+	if tokens[0].text.ToString() != "abc:  " || tokens[0].prefixLength != 2 {
 		t.Errorf("%s", tokens)
 	}
 
 	// With delimiter
-	tokens = Tokenize([]rune(input), delimiterRegexp(":"))
-	if string(tokens[0].text) != "  abc:" || tokens[0].prefixLength != 0 || tokens[0].trimLength != 4 {
-		t.Errorf("%s", tokens)
+	tokens = Tokenize(input, delimiterRegexp(":"))
+	if tokens[0].text.ToString() != "  abc:" || tokens[0].prefixLength != 0 {
+		t.Error(tokens[0].text.ToString(), tokens[0].prefixLength)
 	}
 
 	// With delimiter regex
-	tokens = Tokenize([]rune(input), delimiterRegexp("\\s+"))
-	if string(tokens[0].text) != "  " || tokens[0].prefixLength != 0 || tokens[0].trimLength != 0 ||
-		string(tokens[1].text) != "abc:  " || tokens[1].prefixLength != 2 || tokens[1].trimLength != 4 ||
-		string(tokens[2].text) != "def:  " || tokens[2].prefixLength != 8 || tokens[2].trimLength != 4 ||
-		string(tokens[3].text) != "ghi  " || tokens[3].prefixLength != 14 || tokens[3].trimLength != 3 {
+	tokens = Tokenize(input, delimiterRegexp("\\s+"))
+	if tokens[0].text.ToString() != "  " || tokens[0].prefixLength != 0 ||
+		tokens[1].text.ToString() != "abc:  " || tokens[1].prefixLength != 2 ||
+		tokens[2].text.ToString() != "def:  " || tokens[2].prefixLength != 8 ||
+		tokens[3].text.ToString() != "ghi  " || tokens[3].prefixLength != 14 {
 		t.Errorf("%s", tokens)
 	}
 }
@@ -67,11 +69,11 @@ func TestTokenize(t *testing.T) {
 func TestTransform(t *testing.T) {
 	input := "  abc:  def:  ghi:  jkl"
 	{
-		tokens := Tokenize([]rune(input), Delimiter{})
+		tokens := Tokenize(input, Delimiter{})
 		{
 			ranges := splitNth("1,2,3")
 			tx := Transform(tokens, ranges)
-			if string(joinTokens(tx)) != "abc:  def:  ghi:  " {
+			if joinTokens(tx) != "abc:  def:  ghi:  " {
 				t.Errorf("%s", tx)
 			}
 		}
@@ -80,25 +82,25 @@ func TestTransform(t *testing.T) {
 			tx := Transform(tokens, ranges)
 			if string(joinTokens(tx)) != "abc:  def:  ghi:  def:  ghi:  jklabc:  " ||
 				len(tx) != 4 ||
-				string(tx[0].text) != "abc:  def:  " || tx[0].prefixLength != 2 ||
-				string(tx[1].text) != "ghi:  " || tx[1].prefixLength != 14 ||
-				string(tx[2].text) != "def:  ghi:  jkl" || tx[2].prefixLength != 8 ||
-				string(tx[3].text) != "abc:  " || tx[3].prefixLength != 2 {
+				tx[0].text.ToString() != "abc:  def:  " || tx[0].prefixLength != 2 ||
+				tx[1].text.ToString() != "ghi:  " || tx[1].prefixLength != 14 ||
+				tx[2].text.ToString() != "def:  ghi:  jkl" || tx[2].prefixLength != 8 ||
+				tx[3].text.ToString() != "abc:  " || tx[3].prefixLength != 2 {
 				t.Errorf("%s", tx)
 			}
 		}
 	}
 	{
-		tokens := Tokenize([]rune(input), delimiterRegexp(":"))
+		tokens := Tokenize(input, delimiterRegexp(":"))
 		{
 			ranges := splitNth("1..2,3,2..,1")
 			tx := Transform(tokens, ranges)
-			if string(joinTokens(tx)) != "  abc:  def:  ghi:  def:  ghi:  jkl  abc:" ||
+			if joinTokens(tx) != "  abc:  def:  ghi:  def:  ghi:  jkl  abc:" ||
 				len(tx) != 4 ||
-				string(tx[0].text) != "  abc:  def:" || tx[0].prefixLength != 0 ||
-				string(tx[1].text) != "  ghi:" || tx[1].prefixLength != 12 ||
-				string(tx[2].text) != "  def:  ghi:  jkl" || tx[2].prefixLength != 6 ||
-				string(tx[3].text) != "  abc:" || tx[3].prefixLength != 0 {
+				tx[0].text.ToString() != "  abc:  def:" || tx[0].prefixLength != 0 ||
+				tx[1].text.ToString() != "  ghi:" || tx[1].prefixLength != 12 ||
+				tx[2].text.ToString() != "  def:  ghi:  jkl" || tx[2].prefixLength != 6 ||
+				tx[3].text.ToString() != "  abc:" || tx[3].prefixLength != 0 {
 				t.Errorf("%s", tx)
 			}
 		}

src/tui/dummy.go

@@ -0,0 +1,52 @@
+//go:build !tcell && !windows
+
+package tui
+
+type Attr int32
+
+func HasFullscreenRenderer() bool {
+	return false
+}
+
+var DefaultBorderShape BorderShape = BorderRounded
+
+func (a Attr) Merge(b Attr) Attr {
+	return a | b
+}
+
+const (
+	AttrUndefined = Attr(0)
+	AttrRegular   = Attr(1 << 8)
+	AttrClear     = Attr(1 << 9)
+
+	Bold          = Attr(1)
+	Dim           = Attr(1 << 1)
+	Italic        = Attr(1 << 2)
+	Underline     = Attr(1 << 3)
+	Blink         = Attr(1 << 4)
+	Blink2        = Attr(1 << 5)
+	Reverse       = Attr(1 << 6)
+	StrikeThrough = Attr(1 << 7)
+)
+
+func (r *FullscreenRenderer) Init()                              {}
+func (r *FullscreenRenderer) Resize(maxHeightFunc func(int) int) {}
+func (r *FullscreenRenderer) Pause(bool)                         {}
+func (r *FullscreenRenderer) Resume(bool, bool)                  {}
+func (r *FullscreenRenderer) PassThrough(string)                 {}
+func (r *FullscreenRenderer) Clear()                             {}
+func (r *FullscreenRenderer) NeedScrollbarRedraw() bool          { return false }
+func (r *FullscreenRenderer) Refresh()                           {}
+func (r *FullscreenRenderer) Close()                             {}
+func (r *FullscreenRenderer) Size() TermSize                     { return TermSize{} }
+
+func (r *FullscreenRenderer) GetChar() Event { return Event{} }
+func (r *FullscreenRenderer) Top() int       { return 0 }
+func (r *FullscreenRenderer) MaxX() int      { return 0 }
+func (r *FullscreenRenderer) MaxY() int      { return 0 }
+
+func (r *FullscreenRenderer) RefreshWindows(windows []Window) {}
+
+func (r *FullscreenRenderer) NewWindow(top int, left int, width int, height int, preview bool, borderStyle BorderStyle) Window {
+	return nil
+}

src/tui/light_unix.go

@@ -0,0 +1,119 @@
+//go:build !windows
+
+package tui
+
+import (
+	"fmt"
+	"os"
+	"os/exec"
+	"strings"
+	"syscall"
+
+	"github.com/junegunn/fzf/src/util"
+	"golang.org/x/sys/unix"
+	"golang.org/x/term"
+)
+
+func IsLightRendererSupported() bool {
+	return true
+}
+
+func (r *LightRenderer) defaultTheme() *ColorTheme {
+	if strings.Contains(os.Getenv("TERM"), "256") {
+		return Dark256
+	}
+	colors, err := exec.Command("tput", "colors").Output()
+	if err == nil && atoi(strings.TrimSpace(string(colors)), 16) > 16 {
+		return Dark256
+	}
+	return Default16
+}
+
+func (r *LightRenderer) fd() int {
+	return int(r.ttyin.Fd())
+}
+
+func (r *LightRenderer) initPlatform() error {
+	fd := r.fd()
+	origState, err := term.GetState(fd)
+	if err != nil {
+		return err
+	}
+	r.origState = origState
+	term.MakeRaw(fd)
+	return nil
+}
+
+func (r *LightRenderer) closePlatform() {
+	// NOOP
+}
+
+func openTtyIn() *os.File {
+	in, err := os.OpenFile(consoleDevice, syscall.O_RDONLY, 0)
+	if err != nil {
+		tty := ttyname()
+		if len(tty) > 0 {
+			if in, err := os.OpenFile(tty, syscall.O_RDONLY, 0); err == nil {
+				return in
+			}
+		}
+		fmt.Fprintln(os.Stderr, "Failed to open "+consoleDevice)
+		os.Exit(2)
+	}
+	return in
+}
+
+func (r *LightRenderer) setupTerminal() {
+	term.MakeRaw(r.fd())
+}
+
+func (r *LightRenderer) restoreTerminal() {
+	term.Restore(r.fd(), r.origState)
+}
+
+func (r *LightRenderer) updateTerminalSize() {
+	width, height, err := term.GetSize(r.fd())
+
+	if err == nil {
+		r.width = width
+		r.height = r.maxHeightFunc(height)
+	} else {
+		r.width = getEnv("COLUMNS", defaultWidth)
+		r.height = r.maxHeightFunc(getEnv("LINES", defaultHeight))
+	}
+}
+
+func (r *LightRenderer) findOffset() (row int, col int) {
+	r.csi("6n")
+	r.flush()
+	bytes := []byte{}
+	for tries := 0; tries < offsetPollTries; tries++ {
+		bytes = r.getBytesInternal(bytes, tries > 0)
+		offsets := offsetRegexp.FindSubmatch(bytes)
+		if len(offsets) > 3 {
+			// Add anything we skipped over to the input buffer
+			r.buffer = append(r.buffer, offsets[1]...)
+			return atoi(string(offsets[2]), 0) - 1, atoi(string(offsets[3]), 0) - 1
+		}
+	}
+	return -1, -1
+}
+
+func (r *LightRenderer) getch(nonblock bool) (int, bool) {
+	b := make([]byte, 1)
+	fd := r.fd()
+	util.SetNonblock(r.ttyin, nonblock)
+	_, err := util.Read(fd, b)
+	if err != nil {
+		return 0, false
+	}
+	return int(b[0]), true
+}
+
+func (r *LightRenderer) Size() TermSize {
+	ws, err := unix.IoctlGetWinsize(int(r.ttyin.Fd()), unix.TIOCGWINSZ)
+	if err != nil {
+		return TermSize{}
+	}
+	return TermSize{int(ws.Row), int(ws.Col), int(ws.Xpixel), int(ws.Ypixel)}
+}

src/tui/light_windows.go

@@ -0,0 +1,153 @@
+//go:build windows
+
+package tui
+
+import (
+	"os"
+	"syscall"
+	"time"
+
+	"github.com/junegunn/fzf/src/util"
+	"golang.org/x/sys/windows"
+)
+
+const (
+	timeoutInterval = 10
+)
+
+var (
+	consoleFlagsInput  = uint32(windows.ENABLE_VIRTUAL_TERMINAL_INPUT | windows.ENABLE_PROCESSED_INPUT | windows.ENABLE_EXTENDED_FLAGS)
+	consoleFlagsOutput = uint32(windows.ENABLE_VIRTUAL_TERMINAL_PROCESSING | windows.ENABLE_PROCESSED_OUTPUT | windows.DISABLE_NEWLINE_AUTO_RETURN)
+)
+
+// IsLightRendererSupported checks to see if the Light renderer is supported
+func IsLightRendererSupported() bool {
+	var oldState uint32
+	// enable vt100 emulation (https://docs.microsoft.com/en-us/windows/console/console-virtual-terminal-sequences)
+	if windows.GetConsoleMode(windows.Stderr, &oldState) != nil {
+		return false
+	}
+	// attempt to set mode to determine if we support VT 100 codes. This will work on newer Windows 10
+	// version:
+	canSetVt100 := windows.SetConsoleMode(windows.Stderr, oldState|windows.ENABLE_VIRTUAL_TERMINAL_PROCESSING) == nil
+	var checkState uint32
+	if windows.GetConsoleMode(windows.Stderr, &checkState) != nil ||
+		(checkState&windows.ENABLE_VIRTUAL_TERMINAL_PROCESSING) != windows.ENABLE_VIRTUAL_TERMINAL_PROCESSING {
+		return false
+	}
+	windows.SetConsoleMode(windows.Stderr, oldState)
+	return canSetVt100
+}
+
+func (r *LightRenderer) defaultTheme() *ColorTheme {
+	// the getenv check is borrowed from here: https://github.com/gdamore/tcell/commit/0c473b86d82f68226a142e96cc5a34c5a29b3690#diff-b008fcd5e6934bf31bc3d33bf49f47d8R178:
+	if !IsLightRendererSupported() || os.Getenv("ConEmuPID") != "" || os.Getenv("TCELL_TRUECOLOR") == "disable" {
+		return Default16
+	}
+	return Dark256
+}
+
+func (r *LightRenderer) initPlatform() error {
+	//outHandle := windows.Stdout
+	outHandle, _ := syscall.Open("CONOUT$", syscall.O_RDWR, 0)
+	// enable vt100 emulation (https://docs.microsoft.com/en-us/windows/console/console-virtual-terminal-sequences)
+	if err := windows.GetConsoleMode(windows.Handle(outHandle), &r.origStateOutput); err != nil {
+		return err
+	}
+	r.outHandle = uintptr(outHandle)
+	inHandle, _ := syscall.Open("CONIN$", syscall.O_RDWR, 0)
+	if err := windows.GetConsoleMode(windows.Handle(inHandle), &r.origStateInput); err != nil {
+		return err
+	}
+	r.inHandle = uintptr(inHandle)
+
+	r.setupTerminal()
+
+	// channel for non-blocking reads. Buffer to make sure
+	// we get the ESC sets:
+	r.ttyinChannel = make(chan byte, 1024)
+
+	// the following allows for non-blocking IO.
+	// syscall.SetNonblock() is a NOOP under Windows.
+	go func() {
+		fd := int(r.inHandle)
+		b := make([]byte, 1)
+		for {
+			// HACK: if run from PSReadline, something resets ConsoleMode to remove ENABLE_VIRTUAL_TERMINAL_INPUT.
+			_ = windows.SetConsoleMode(windows.Handle(r.inHandle), consoleFlagsInput)
+
+			_, err := util.Read(fd, b)
+			if err == nil {
+				r.ttyinChannel <- b[0]
+			}
+		}
+	}()
+
+	return nil
+}
+
+func (r *LightRenderer) closePlatform() {
+	windows.SetConsoleMode(windows.Handle(r.outHandle), r.origStateOutput)
+	windows.SetConsoleMode(windows.Handle(r.inHandle), r.origStateInput)
+}
+
+func openTtyIn() *os.File {
+	// not used
+	return nil
+}
+
+func (r *LightRenderer) setupTerminal() error {
+	if err := windows.SetConsoleMode(windows.Handle(r.outHandle), consoleFlagsOutput); err != nil {
+		return err
+	}
+	return windows.SetConsoleMode(windows.Handle(r.inHandle), consoleFlagsInput)
+}
+
+func (r *LightRenderer) restoreTerminal() error {
+	if err := windows.SetConsoleMode(windows.Handle(r.inHandle), r.origStateInput); err != nil {
+		return err
+	}
+	return windows.SetConsoleMode(windows.Handle(r.outHandle), r.origStateOutput)
+}
+
+func (r *LightRenderer) Size() TermSize {
+	var w, h int
+	var bufferInfo windows.ConsoleScreenBufferInfo
+	if err := windows.GetConsoleScreenBufferInfo(windows.Handle(r.outHandle), &bufferInfo); err != nil {
+		w = getEnv("COLUMNS", defaultWidth)
+		h = r.maxHeightFunc(getEnv("LINES", defaultHeight))
+
+	} else {
+		w = int(bufferInfo.Window.Right - bufferInfo.Window.Left)
+		h = r.maxHeightFunc(int(bufferInfo.Window.Bottom - bufferInfo.Window.Top))
+	}
+	return TermSize{h, w, 0, 0}
+}
+
+func (r *LightRenderer) updateTerminalSize() {
+	size := r.Size()
+	r.width = size.Columns
+	r.height = size.Lines
+}
+
+func (r *LightRenderer) findOffset() (row int, col int) {
+	var bufferInfo windows.ConsoleScreenBufferInfo
+	if err := windows.GetConsoleScreenBufferInfo(windows.Handle(r.outHandle), &bufferInfo); err != nil {
+		return -1, -1
+	}
+	return int(bufferInfo.CursorPosition.X), int(bufferInfo.CursorPosition.Y)
+}
+
+func (r *LightRenderer) getch(nonblock bool) (int, bool) {
+	if nonblock {
+		select {
+		case bc := <-r.ttyinChannel:
+			return int(bc), true
+		case <-time.After(timeoutInterval * time.Millisecond):
+			return 0, false
+		}
+	} else {
+		bc := <-r.ttyinChannel
+		return int(bc), true
+	}
+}

src/tui/tcell.go

@@ -0,0 +1,788 @@
+//go:build tcell || windows
+
+package tui
+
+import (
+	"os"
+	"time"
+
+	"github.com/gdamore/tcell/v2"
+	"github.com/gdamore/tcell/v2/encoding"
+	"github.com/junegunn/fzf/src/util"
+
+	"github.com/junegunn/uniseg"
+)
+
+func HasFullscreenRenderer() bool {
+	return true
+}
+
+var DefaultBorderShape BorderShape = BorderSharp
+
+func asTcellColor(color Color) tcell.Color {
+	if color == colDefault {
+		return tcell.ColorDefault
+	}
+
+	value := uint64(tcell.ColorValid) + uint64(color)
+	if color.is24() {
+		value = value | uint64(tcell.ColorIsRGB)
+	}
+	return tcell.Color(value)
+}
+
+func (p ColorPair) style() tcell.Style {
+	style := tcell.StyleDefault
+	return style.Foreground(asTcellColor(p.Fg())).Background(asTcellColor(p.Bg()))
+}
+
+type Attr int32
+
+type TcellWindow struct {
+	color       bool
+	preview     bool
+	top         int
+	left        int
+	width       int
+	height      int
+	normal      ColorPair
+	lastX       int
+	lastY       int
+	moveCursor  bool
+	borderStyle BorderStyle
+}
+
+func (w *TcellWindow) Top() int {
+	return w.top
+}
+
+func (w *TcellWindow) Left() int {
+	return w.left
+}
+
+func (w *TcellWindow) Width() int {
+	return w.width
+}
+
+func (w *TcellWindow) Height() int {
+	return w.height
+}
+
+func (w *TcellWindow) Refresh() {
+	if w.moveCursor {
+		_screen.ShowCursor(w.left+w.lastX, w.top+w.lastY)
+		w.moveCursor = false
+	}
+	w.lastX = 0
+	w.lastY = 0
+}
+
+func (w *TcellWindow) FinishFill() {
+	// NO-OP
+}
+
+const (
+	Bold          Attr = Attr(tcell.AttrBold)
+	Dim                = Attr(tcell.AttrDim)
+	Blink              = Attr(tcell.AttrBlink)
+	Reverse            = Attr(tcell.AttrReverse)
+	Underline          = Attr(tcell.AttrUnderline)
+	StrikeThrough      = Attr(tcell.AttrStrikeThrough)
+	Italic             = Attr(tcell.AttrItalic)
+)
+
+const (
+	AttrUndefined = Attr(0)
+	AttrRegular   = Attr(1 << 7)
+	AttrClear     = Attr(1 << 8)
+)
+
+func (r *FullscreenRenderer) PassThrough(str string) {
+	// No-op
+	// https://github.com/gdamore/tcell/pull/650#issuecomment-1806442846
+}
+
+func (r *FullscreenRenderer) Resize(maxHeightFunc func(int) int) {}
+
+func (r *FullscreenRenderer) defaultTheme() *ColorTheme {
+	if _screen.Colors() >= 256 {
+		return Dark256
+	}
+	return Default16
+}
+
+var (
+	_colorToAttribute = []tcell.Color{
+		tcell.ColorBlack,
+		tcell.ColorRed,
+		tcell.ColorGreen,
+		tcell.ColorYellow,
+		tcell.ColorBlue,
+		tcell.ColorDarkMagenta,
+		tcell.ColorLightCyan,
+		tcell.ColorWhite,
+	}
+)
+
+func (c Color) Style() tcell.Color {
+	if c <= colDefault {
+		return tcell.ColorDefault
+	} else if c >= colBlack && c <= colWhite {
+		return _colorToAttribute[int(c)]
+	} else {
+		return tcell.Color(c)
+	}
+}
+
+func (a Attr) Merge(b Attr) Attr {
+	return a | b
+}
+
+// handle the following as private members of FullscreenRenderer instance
+// they are declared here to prevent introducing tcell library in non-windows builds
+var (
+	_screen          tcell.Screen
+	_prevMouseButton tcell.ButtonMask
+)
+
+func (r *FullscreenRenderer) initScreen() {
+	s, e := tcell.NewScreen()
+	if e != nil {
+		errorExit(e.Error())
+	}
+	if e = s.Init(); e != nil {
+		errorExit(e.Error())
+	}
+	if r.mouse {
+		s.EnableMouse()
+	} else {
+		s.DisableMouse()
+	}
+	_screen = s
+}
+
+func (r *FullscreenRenderer) Init() {
+	if os.Getenv("TERM") == "cygwin" {
+		os.Setenv("TERM", "")
+	}
+	encoding.Register()
+
+	r.initScreen()
+	initTheme(r.theme, r.defaultTheme(), r.forceBlack)
+}
+
+func (r *FullscreenRenderer) Top() int {
+	return 0
+}
+
+func (r *FullscreenRenderer) MaxX() int {
+	ncols, _ := _screen.Size()
+	return int(ncols)
+}
+
+func (r *FullscreenRenderer) MaxY() int {
+	_, nlines := _screen.Size()
+	return int(nlines)
+}
+
+func (w *TcellWindow) X() int {
+	return w.lastX
+}
+
+func (w *TcellWindow) Y() int {
+	return w.lastY
+}
+
+func (r *FullscreenRenderer) Clear() {
+	_screen.Sync()
+	_screen.Clear()
+}
+
+func (r *FullscreenRenderer) NeedScrollbarRedraw() bool {
+	return true
+}
+
+func (r *FullscreenRenderer) Refresh() {
+	// noop
+}
+
+// TODO: Pixel width and height not implemented
+func (r *FullscreenRenderer) Size() TermSize {
+	cols, lines := _screen.Size()
+	return TermSize{lines, cols, 0, 0}
+}
+
+func (r *FullscreenRenderer) GetChar() Event {
+	ev := _screen.PollEvent()
+	switch ev := ev.(type) {
+	case *tcell.EventResize:
+		return Event{Resize, 0, nil}
+
+	// process mouse events:
+	case *tcell.EventMouse:
+		// mouse down events have zeroed buttons, so we can't use them
+		// mouse up event consists of two events, 1. (main) event with modifier and other metadata, 2. event with zeroed buttons
+		// so mouse click is three consecutive events, but the first and last are indistinguishable from movement events (with released buttons)
+		// dragging has same structure, it only repeats the middle (main) event appropriately
+		x, y := ev.Position()
+		mod := ev.Modifiers() != 0
+
+		// since we dont have mouse down events (unlike LightRenderer), we need to track state in prevButton
+		prevButton, button := _prevMouseButton, ev.Buttons()
+		_prevMouseButton = button
+		drag := prevButton == button
+
+		switch {
+		case button&tcell.WheelDown != 0:
+			return Event{Mouse, 0, &MouseEvent{y, x, -1, false, false, false, mod}}
+		case button&tcell.WheelUp != 0:
+			return Event{Mouse, 0, &MouseEvent{y, x, +1, false, false, false, mod}}
+		case button&tcell.Button1 != 0:
+			double := false
+			if !drag {
+				// all potential double click events put their coordinates in the clicks array
+				// double click event has two conditions, temporal and spatial, the first is checked here
+				now := time.Now()
+				if now.Sub(r.prevDownTime) < doubleClickDuration {
+					r.clicks = append(r.clicks, [2]int{x, y})
+				} else {
+					r.clicks = [][2]int{{x, y}}
+				}
+				r.prevDownTime = now
+
+				// detect double clicks (also check for spatial condition)
+				n := len(r.clicks)
+				double = n > 1 && r.clicks[n-2][0] == r.clicks[n-1][0] && r.clicks[n-2][1] == r.clicks[n-1][1]
+				if double {
+					// make sure two consecutive double clicks require four clicks
+					r.clicks = [][2]int{}
+				}
+			}
+			// fire single or double click event
+			return Event{Mouse, 0, &MouseEvent{y, x, 0, true, !double, double, mod}}
+		case button&tcell.Button2 != 0:
+			return Event{Mouse, 0, &MouseEvent{y, x, 0, false, true, false, mod}}
+		default:
+			// double and single taps on Windows don't quite work due to
+			// the console acting on the events and not allowing us
+			// to consume them.
+			left := button&tcell.Button1 != 0
+			down := left || button&tcell.Button3 != 0
+			double := false
+
+			return Event{Mouse, 0, &MouseEvent{y, x, 0, left, down, double, mod}}
+		}
+
+		// process keyboard:
+	case *tcell.EventKey:
+		mods := ev.Modifiers()
+		none := mods == tcell.ModNone
+		alt := (mods & tcell.ModAlt) > 0
+		ctrl := (mods & tcell.ModCtrl) > 0
+		shift := (mods & tcell.ModShift) > 0
+		ctrlAlt := ctrl && alt
+		altShift := alt && shift
+
+		keyfn := func(r rune) Event {
+			if alt {
+				return CtrlAltKey(r)
+			}
+			return EventType(CtrlA.Int() - 'a' + int(r)).AsEvent()
+		}
+		switch ev.Key() {
+		// section 1: Ctrl+(Alt)+[a-z]
+		case tcell.KeyCtrlA:
+			return keyfn('a')
+		case tcell.KeyCtrlB:
+			return keyfn('b')
+		case tcell.KeyCtrlC:
+			return keyfn('c')
+		case tcell.KeyCtrlD:
+			return keyfn('d')
+		case tcell.KeyCtrlE:
+			return keyfn('e')
+		case tcell.KeyCtrlF:
+			return keyfn('f')
+		case tcell.KeyCtrlG:
+			return keyfn('g')
+		case tcell.KeyCtrlH:
+			switch ev.Rune() {
+			case 0:
+				if ctrl {
+					return Event{BSpace, 0, nil}
+				}
+			case rune(tcell.KeyCtrlH):
+				switch {
+				case ctrl:
+					return keyfn('h')
+				case alt:
+					return Event{AltBS, 0, nil}
+				case none, shift:
+					return Event{BSpace, 0, nil}
+				}
+			}
+		case tcell.KeyCtrlI:
+			return keyfn('i')
+		case tcell.KeyCtrlJ:
+			return keyfn('j')
+		case tcell.KeyCtrlK:
+			return keyfn('k')
+		case tcell.KeyCtrlL:
+			return keyfn('l')
+		case tcell.KeyCtrlM:
+			return keyfn('m')
+		case tcell.KeyCtrlN:
+			return keyfn('n')
+		case tcell.KeyCtrlO:
+			return keyfn('o')
+		case tcell.KeyCtrlP:
+			return keyfn('p')
+		case tcell.KeyCtrlQ:
+			return keyfn('q')
+		case tcell.KeyCtrlR:
+			return keyfn('r')
+		case tcell.KeyCtrlS:
+			return keyfn('s')
+		case tcell.KeyCtrlT:
+			return keyfn('t')
+		case tcell.KeyCtrlU:
+			return keyfn('u')
+		case tcell.KeyCtrlV:
+			return keyfn('v')
+		case tcell.KeyCtrlW:
+			return keyfn('w')
+		case tcell.KeyCtrlX:
+			return keyfn('x')
+		case tcell.KeyCtrlY:
+			return keyfn('y')
+		case tcell.KeyCtrlZ:
+			return keyfn('z')
+		// section 2: Ctrl+[ \]_]
+		case tcell.KeyCtrlSpace:
+			return Event{CtrlSpace, 0, nil}
+		case tcell.KeyCtrlBackslash:
+			return Event{CtrlBackSlash, 0, nil}
+		case tcell.KeyCtrlRightSq:
+			return Event{CtrlRightBracket, 0, nil}
+		case tcell.KeyCtrlCarat:
+			return Event{CtrlCaret, 0, nil}
+		case tcell.KeyCtrlUnderscore:
+			return Event{CtrlSlash, 0, nil}
+		// section 3: (Alt)+Backspace2
+		case tcell.KeyBackspace2:
+			if alt {
+				return Event{AltBS, 0, nil}
+			}
+			return Event{BSpace, 0, nil}
+
+		// section 4: (Alt+Shift)+Key(Up|Down|Left|Right)
+		case tcell.KeyUp:
+			if altShift {
+				return Event{AltSUp, 0, nil}
+			}
+			if shift {
+				return Event{SUp, 0, nil}
+			}
+			if alt {
+				return Event{AltUp, 0, nil}
+			}
+			return Event{Up, 0, nil}
+		case tcell.KeyDown:
+			if altShift {
+				return Event{AltSDown, 0, nil}
+			}
+			if shift {
+				return Event{SDown, 0, nil}
+			}
+			if alt {
+				return Event{AltDown, 0, nil}
+			}
+			return Event{Down, 0, nil}
+		case tcell.KeyLeft:
+			if altShift {
+				return Event{AltSLeft, 0, nil}
+			}
+			if shift {
+				return Event{SLeft, 0, nil}
+			}
+			if alt {
+				return Event{AltLeft, 0, nil}
+			}
+			return Event{Left, 0, nil}
+		case tcell.KeyRight:
+			if altShift {
+				return Event{AltSRight, 0, nil}
+			}
+			if shift {
+				return Event{SRight, 0, nil}
+			}
+			if alt {
+				return Event{AltRight, 0, nil}
+			}
+			return Event{Right, 0, nil}
+
+		// section 5: (Insert|Home|Delete|End|PgUp|PgDn|BackTab|F1-F12)
+		case tcell.KeyInsert:
+			return Event{Insert, 0, nil}
+		case tcell.KeyHome:
+			return Event{Home, 0, nil}
+		case tcell.KeyDelete:
+			if ctrl {
+				return Event{CtrlDelete, 0, nil}
+			}
+			if shift {
+				return Event{SDelete, 0, nil}
+			}
+			return Event{Del, 0, nil}
+		case tcell.KeyEnd:
+			return Event{End, 0, nil}
+		case tcell.KeyPgUp:
+			return Event{PgUp, 0, nil}
+		case tcell.KeyPgDn:
+			return Event{PgDn, 0, nil}
+		case tcell.KeyBacktab:
+			return Event{BTab, 0, nil}
+		case tcell.KeyF1:
+			return Event{F1, 0, nil}
+		case tcell.KeyF2:
+			return Event{F2, 0, nil}
+		case tcell.KeyF3:
+			return Event{F3, 0, nil}
+		case tcell.KeyF4:
+			return Event{F4, 0, nil}
+		case tcell.KeyF5:
+			return Event{F5, 0, nil}
+		case tcell.KeyF6:
+			return Event{F6, 0, nil}
+		case tcell.KeyF7:
+			return Event{F7, 0, nil}
+		case tcell.KeyF8:
+			return Event{F8, 0, nil}
+		case tcell.KeyF9:
+			return Event{F9, 0, nil}
+		case tcell.KeyF10:
+			return Event{F10, 0, nil}
+		case tcell.KeyF11:
+			return Event{F11, 0, nil}
+		case tcell.KeyF12:
+			return Event{F12, 0, nil}
+
+		// section 6: (Ctrl+Alt)+'rune'
+		case tcell.KeyRune:
+			r := ev.Rune()
+
+			switch {
+			// translate native key events to ascii control characters
+			case r == ' ' && ctrl:
+				return Event{CtrlSpace, 0, nil}
+			// handle AltGr characters
+			case ctrlAlt:
+				return Event{Rune, r, nil} // dropping modifiers
+			// simple characters (possibly with modifier)
+			case alt:
+				return AltKey(r)
+			default:
+				return Event{Rune, r, nil}
+			}
+
+		// section 7: Esc
+		case tcell.KeyEsc:
+			return Event{ESC, 0, nil}
+		}
+	}
+
+	// section 8: Invalid
+	return Event{Invalid, 0, nil}
+}
+
+func (r *FullscreenRenderer) Pause(clear bool) {
+	if clear {
+		_screen.Fini()
+	}
+}
+
+func (r *FullscreenRenderer) Resume(clear bool, sigcont bool) {
+	if clear {
+		r.initScreen()
+	}
+}
+
+func (r *FullscreenRenderer) Close() {
+	_screen.Fini()
+}
+
+func (r *FullscreenRenderer) RefreshWindows(windows []Window) {
+	// TODO
+	for _, w := range windows {
+		w.Refresh()
+	}
+	_screen.Show()
+}
+
+func (r *FullscreenRenderer) NewWindow(top int, left int, width int, height int, preview bool, borderStyle BorderStyle) Window {
+	normal := ColNormal
+	if preview {
+		normal = ColPreview
+	}
+	w := &TcellWindow{
+		color:       r.theme.Colored,
+		preview:     preview,
+		top:         top,
+		left:        left,
+		width:       width,
+		height:      height,
+		normal:      normal,
+		borderStyle: borderStyle}
+	w.drawBorder(false)
+	return w
+}
+
+func (w *TcellWindow) Close() {
+	// TODO
+}
+
+func fill(x, y, w, h int, n ColorPair, r rune) {
+	for ly := 0; ly <= h; ly++ {
+		for lx := 0; lx <= w; lx++ {
+			_screen.SetContent(x+lx, y+ly, r, nil, n.style())
+		}
+	}
+}
+
+func (w *TcellWindow) Erase() {
+	w.drawBorder(false)
+	fill(w.left-1, w.top, w.width+1, w.height-1, w.normal, ' ')
+}
+
+func (w *TcellWindow) EraseMaybe() bool {
+	w.Erase()
+	return true
+}
+
+func (w *TcellWindow) Enclose(y int, x int) bool {
+	return x >= w.left && x < (w.left+w.width) &&
+		y >= w.top && y < (w.top+w.height)
+}
+
+func (w *TcellWindow) Move(y int, x int) {
+	w.lastX = x
+	w.lastY = y
+	w.moveCursor = true
+}
+
+func (w *TcellWindow) MoveAndClear(y int, x int) {
+	w.Move(y, x)
+	for i := w.lastX; i < w.width; i++ {
+		_screen.SetContent(i+w.left, w.lastY+w.top, rune(' '), nil, w.normal.style())
+	}
+	w.lastX = x
+}
+
+func (w *TcellWindow) Print(text string) {
+	w.printString(text, w.normal)
+}
+
+func (w *TcellWindow) printString(text string, pair ColorPair) {
+	lx := 0
+	a := pair.Attr()
+
+	style := pair.style()
+	if a&AttrClear == 0 {
+		style = style.
+			Reverse(a&Attr(tcell.AttrReverse) != 0).
+			Underline(a&Attr(tcell.AttrUnderline) != 0).
+			StrikeThrough(a&Attr(tcell.AttrStrikeThrough) != 0).
+			Italic(a&Attr(tcell.AttrItalic) != 0).
+			Blink(a&Attr(tcell.AttrBlink) != 0).
+			Dim(a&Attr(tcell.AttrDim) != 0)
+	}
+
+	gr := uniseg.NewGraphemes(text)
+	for gr.Next() {
+		st := style
+		rs := gr.Runes()
+
+		if len(rs) == 1 {
+			r := rs[0]
+			if r == '\r' {
+				st = style.Dim(true)
+				rs[0] = '␍'
+			} else if r == '\n' {
+				st = style.Dim(true)
+				rs[0] = '␊'
+			} else if r < rune(' ') { // ignore control characters
+				continue
+			}
+		}
+		var xPos = w.left + w.lastX + lx
+		var yPos = w.top + w.lastY
+		if xPos < (w.left+w.width) && yPos < (w.top+w.height) {
+			_screen.SetContent(xPos, yPos, rs[0], rs[1:], st)
+		}
+		lx += util.StringWidth(string(rs))
+	}
+	w.lastX += lx
+}
+
+func (w *TcellWindow) CPrint(pair ColorPair, text string) {
+	w.printString(text, pair)
+}
+
+func (w *TcellWindow) fillString(text string, pair ColorPair) FillReturn {
+	lx := 0
+	a := pair.Attr()
+
+	var style tcell.Style
+	if w.color {
+		style = pair.style()
+	} else {
+		style = w.normal.style()
+	}
+	style = style.
+		Blink(a&Attr(tcell.AttrBlink) != 0).
+		Bold(a&Attr(tcell.AttrBold) != 0).
+		Dim(a&Attr(tcell.AttrDim) != 0).
+		Reverse(a&Attr(tcell.AttrReverse) != 0).
+		Underline(a&Attr(tcell.AttrUnderline) != 0).
+		StrikeThrough(a&Attr(tcell.AttrStrikeThrough) != 0).
+		Italic(a&Attr(tcell.AttrItalic) != 0)
+
+	gr := uniseg.NewGraphemes(text)
+Loop:
+	for gr.Next() {
+		st := style
+		rs := gr.Runes()
+		if len(rs) == 1 {
+			r := rs[0]
+			switch r {
+			case '\r':
+				st = style.Dim(true)
+				rs[0] = '␍'
+			case '\n':
+				w.lastY++
+				w.lastX = 0
+				lx = 0
+				continue Loop
+			}
+		}
+
+		// word wrap:
+		xPos := w.left + w.lastX + lx
+		if xPos >= (w.left + w.width) {
+			w.lastY++
+			w.lastX = 0
+			lx = 0
+			xPos = w.left
+		}
+
+		yPos := w.top + w.lastY
+		if yPos >= (w.top + w.height) {
+			return FillSuspend
+		}
+
+		_screen.SetContent(xPos, yPos, rs[0], rs[1:], st)
+		lx += util.StringWidth(string(rs))
+	}
+	w.lastX += lx
+	if w.lastX == w.width {
+		w.lastY++
+		w.lastX = 0
+		return FillNextLine
+	}
+
+	return FillContinue
+}
+
+func (w *TcellWindow) Fill(str string) FillReturn {
+	return w.fillString(str, w.normal)
+}
+
+func (w *TcellWindow) CFill(fg Color, bg Color, a Attr, str string) FillReturn {
+	if fg == colDefault {
+		fg = w.normal.Fg()
+	}
+	if bg == colDefault {
+		bg = w.normal.Bg()
+	}
+	return w.fillString(str, NewColorPair(fg, bg, a))
+}
+
+func (w *TcellWindow) DrawBorder() {
+	w.drawBorder(false)
+}
+
+func (w *TcellWindow) DrawHBorder() {
+	w.drawBorder(true)
+}
+
+func (w *TcellWindow) drawBorder(onlyHorizontal bool) {
+	shape := w.borderStyle.shape
+	if shape == BorderNone {
+		return
+	}
+
+	left := w.left
+	right := left + w.width
+	top := w.top
+	bot := top + w.height
+
+	var style tcell.Style
+	if w.color {
+		if w.preview {
+			style = ColPreviewBorder.style()
+		} else {
+			style = ColBorder.style()
+		}
+	} else {
+		style = w.normal.style()
+	}
+
+	hw := runeWidth(w.borderStyle.top)
+	switch shape {
+	case BorderRounded, BorderSharp, BorderBold, BorderBlock, BorderThinBlock, BorderDouble, BorderHorizontal, BorderTop:
+		max := right - 2*hw
+		if shape == BorderHorizontal || shape == BorderTop {
+			max = right - hw
+		}
+		// tcell has an issue displaying two overlapping wide runes
+		// e.g.  SetContent(  HH  )
+		//       SetContent(   TR )
+		//       ==================
+		//                 (  HH  ) => TR is ignored
+		for x := left; x <= max; x += hw {
+			_screen.SetContent(x, top, w.borderStyle.top, nil, style)
+		}
+	}
+	switch shape {
+	case BorderRounded, BorderSharp, BorderBold, BorderBlock, BorderThinBlock, BorderDouble, BorderHorizontal, BorderBottom:
+		max := right - 2*hw
+		if shape == BorderHorizontal || shape == BorderBottom {
+			max = right - hw
+		}
+		for x := left; x <= max; x += hw {
+			_screen.SetContent(x, bot-1, w.borderStyle.bottom, nil, style)
+		}
+	}
+	if !onlyHorizontal {
+		switch shape {
+		case BorderRounded, BorderSharp, BorderBold, BorderBlock, BorderThinBlock, BorderDouble, BorderVertical, BorderLeft:
+			for y := top; y < bot; y++ {
+				_screen.SetContent(left, y, w.borderStyle.left, nil, style)
+			}
+		}
+		switch shape {
+		case BorderRounded, BorderSharp, BorderBold, BorderBlock, BorderThinBlock, BorderDouble, BorderVertical, BorderRight:
+			vw := runeWidth(w.borderStyle.right)
+			for y := top; y < bot; y++ {
+				_screen.SetContent(right-vw, y, w.borderStyle.right, nil, style)
+			}
+		}
+	}
+	switch shape {
+	case BorderRounded, BorderSharp, BorderBold, BorderBlock, BorderThinBlock, BorderDouble:
+		_screen.SetContent(left, top, w.borderStyle.topLeft, nil, style)
+		_screen.SetContent(right-runeWidth(w.borderStyle.topRight), top, w.borderStyle.topRight, nil, style)
+		_screen.SetContent(left, bot-1, w.borderStyle.bottomLeft, nil, style)
+		_screen.SetContent(right-runeWidth(w.borderStyle.bottomRight), bot-1, w.borderStyle.bottomRight, nil, style)
+	}
+}

src/tui/tcell_test.go

@@ -0,0 +1,392 @@
+//go:build tcell || windows
+
+package tui
+
+import (
+	"testing"
+
+	"github.com/gdamore/tcell/v2"
+	"github.com/junegunn/fzf/src/util"
+)
+
+func assert(t *testing.T, context string, got interface{}, want interface{}) bool {
+	if got == want {
+		return true
+	} else {
+		t.Errorf("%s = (%T)%v, want (%T)%v", context, got, got, want, want)
+		return false
+	}
+}
+
+// Test the handling of the tcell keyboard events.
+func TestGetCharEventKey(t *testing.T) {
+	if util.ToTty() {
+		// This test is skipped when output goes to terminal, because it causes
+		// some glitches:
+		// - output lines may not start at the beginning of a row which makes
+		//   the output unreadable
+		// - terminal may get cleared which prevents you from seeing results of
+		//   previous tests
+		// Good ways to prevent the glitches are piping the output to a pager
+		// or redirecting to a file. I've found `less +G` to be trouble-free.
+		t.Skip("Skipped because this test misbehaves in terminal, pipe to a pager or redirect output to a file to run it safely.")
+	} else if testing.Verbose() {
+		// I have observed a behaviour when this test outputted more than 8192
+		// bytes (32*256) into the 'less' pager, both the go's test executable
+		// and the pager hanged. The go's executable was blocking on printing.
+		// I was able to create minimal working example of that behaviour, but
+		// that example hanged after 12256 bytes (32*(256+127)).
+		t.Log("If you are piping this test to a pager and it hangs, make the pager greedy for input, e.g. 'less +G'.")
+	}
+
+	if !HasFullscreenRenderer() {
+		t.Skip("Can't test FullscreenRenderer.")
+	}
+
+	// construct test cases
+	type giveKey struct {
+		Type tcell.Key
+		Char rune
+		Mods tcell.ModMask
+	}
+	type wantKey = Event
+	type testCase struct {
+		giveKey
+		wantKey
+	}
+	/*
+		Some test cases are marked "fabricated". It means that giveKey value
+		is valid, but it is not what you get when you press the keys. For
+		example Ctrl+C will NOT give you tcell.KeyCtrlC, but tcell.KeyETX
+		(End-Of-Text character, causing SIGINT).
+		I was trying to accompany the fabricated test cases with real ones.
+
+		Some test cases are marked "unhandled". It means that giveKey.Type
+		is not present in tcell.go source code. It can still be handled via
+		implicit or explicit alias.
+
+		If not said otherwise, test cases are for US keyboard.
+
+		(tabstop=44)
+	*/
+	tests := []testCase{
+
+		// section 1: Ctrl+(Alt)+[a-z]
+		{giveKey{tcell.KeyCtrlA, rune(tcell.KeyCtrlA), tcell.ModCtrl}, wantKey{CtrlA, 0, nil}},
+		{giveKey{tcell.KeyCtrlC, rune(tcell.KeyCtrlC), tcell.ModCtrl}, wantKey{CtrlC, 0, nil}}, // fabricated
+		{giveKey{tcell.KeyETX, rune(tcell.KeyETX), tcell.ModCtrl}, wantKey{CtrlC, 0, nil}},     // this is SIGINT (Ctrl+C)
+		{giveKey{tcell.KeyCtrlZ, rune(tcell.KeyCtrlZ), tcell.ModCtrl}, wantKey{CtrlZ, 0, nil}}, // fabricated
+		// KeyTab is alias for KeyTAB
+		{giveKey{tcell.KeyCtrlI, rune(tcell.KeyCtrlI), tcell.ModCtrl}, wantKey{Tab, 0, nil}}, // fabricated
+		{giveKey{tcell.KeyTab, rune(tcell.KeyTab), tcell.ModNone}, wantKey{Tab, 0, nil}},     // unhandled, actual "Tab" keystroke
+		{giveKey{tcell.KeyTAB, rune(tcell.KeyTAB), tcell.ModNone}, wantKey{Tab, 0, nil}},     // fabricated, unhandled
+		// KeyEnter is alias for KeyCR
+		{giveKey{tcell.KeyCtrlM, rune(tcell.KeyCtrlM), tcell.ModNone}, wantKey{CtrlM, 0, nil}}, // actual "Enter" keystroke
+		{giveKey{tcell.KeyCR, rune(tcell.KeyCR), tcell.ModNone}, wantKey{CtrlM, 0, nil}},       // fabricated, unhandled
+		{giveKey{tcell.KeyEnter, rune(tcell.KeyEnter), tcell.ModNone}, wantKey{CtrlM, 0, nil}}, // fabricated, unhandled
+		// Ctrl+Alt keys
+		{giveKey{tcell.KeyCtrlA, rune(tcell.KeyCtrlA), tcell.ModCtrl | tcell.ModAlt}, wantKey{CtrlAlt, 'a', nil}},                  // fabricated
+		{giveKey{tcell.KeyCtrlA, rune(tcell.KeyCtrlA), tcell.ModCtrl | tcell.ModAlt | tcell.ModShift}, wantKey{CtrlAlt, 'a', nil}}, // fabricated
+
+		// section 2: Ctrl+[ \]_]
+		{giveKey{tcell.KeyCtrlSpace, rune(tcell.KeyCtrlSpace), tcell.ModCtrl}, wantKey{CtrlSpace, 0, nil}}, // fabricated
+		{giveKey{tcell.KeyNUL, rune(tcell.KeyNUL), tcell.ModNone}, wantKey{CtrlSpace, 0, nil}},             // fabricated, unhandled
+		{giveKey{tcell.KeyRune, ' ', tcell.ModCtrl}, wantKey{CtrlSpace, 0, nil}},                           // actual Ctrl+' '
+		{giveKey{tcell.KeyCtrlBackslash, rune(tcell.KeyCtrlBackslash), tcell.ModCtrl}, wantKey{CtrlBackSlash, 0, nil}},
+		{giveKey{tcell.KeyCtrlRightSq, rune(tcell.KeyCtrlRightSq), tcell.ModCtrl}, wantKey{CtrlRightBracket, 0, nil}},
+		{giveKey{tcell.KeyCtrlCarat, rune(tcell.KeyCtrlCarat), tcell.ModShift | tcell.ModCtrl}, wantKey{CtrlCaret, 0, nil}}, // fabricated
+		{giveKey{tcell.KeyRS, rune(tcell.KeyRS), tcell.ModShift | tcell.ModCtrl}, wantKey{CtrlCaret, 0, nil}},               // actual Ctrl+Shift+6 (i.e. Ctrl+^) keystroke
+		{giveKey{tcell.KeyCtrlUnderscore, rune(tcell.KeyCtrlUnderscore), tcell.ModShift | tcell.ModCtrl}, wantKey{CtrlSlash, 0, nil}},
+
+		// section 3: (Alt)+Backspace2
+		// KeyBackspace2 is alias for KeyDEL = 0x7F (ASCII) (allegedly unused by Windows)
+		// KeyDelete = 0x2E (VK_DELETE constant in Windows)
+		// KeyBackspace is alias for KeyBS = 0x08 (ASCII) (implicit alias with KeyCtrlH)
+		{giveKey{tcell.KeyBackspace2, 0, tcell.ModNone}, wantKey{BSpace, 0, nil}}, // fabricated
+		{giveKey{tcell.KeyBackspace2, 0, tcell.ModAlt}, wantKey{AltBS, 0, nil}},   // fabricated
+		{giveKey{tcell.KeyDEL, 0, tcell.ModNone}, wantKey{BSpace, 0, nil}},        // fabricated, unhandled
+		{giveKey{tcell.KeyDelete, 0, tcell.ModNone}, wantKey{Del, 0, nil}},
+		{giveKey{tcell.KeyDelete, 0, tcell.ModAlt}, wantKey{Del, 0, nil}},
+		{giveKey{tcell.KeyBackspace, 0, tcell.ModNone}, wantKey{Invalid, 0, nil}},                                                  // fabricated, unhandled
+		{giveKey{tcell.KeyBS, 0, tcell.ModNone}, wantKey{Invalid, 0, nil}},                                                         // fabricated, unhandled
+		{giveKey{tcell.KeyCtrlH, 0, tcell.ModNone}, wantKey{Invalid, 0, nil}},                                                      // fabricated, unhandled
+		{giveKey{tcell.KeyCtrlH, rune(tcell.KeyCtrlH), tcell.ModNone}, wantKey{BSpace, 0, nil}},                                    // actual "Backspace" keystroke
+		{giveKey{tcell.KeyCtrlH, rune(tcell.KeyCtrlH), tcell.ModAlt}, wantKey{AltBS, 0, nil}},                                      // actual "Alt+Backspace" keystroke
+		{giveKey{tcell.KeyDEL, rune(tcell.KeyDEL), tcell.ModCtrl}, wantKey{BSpace, 0, nil}},                                        // actual "Ctrl+Backspace" keystroke
+		{giveKey{tcell.KeyCtrlH, rune(tcell.KeyCtrlH), tcell.ModShift}, wantKey{BSpace, 0, nil}},                                   // actual "Shift+Backspace" keystroke
+		{giveKey{tcell.KeyCtrlH, 0, tcell.ModCtrl | tcell.ModAlt}, wantKey{BSpace, 0, nil}},                                        // actual "Ctrl+Alt+Backspace" keystroke
+		{giveKey{tcell.KeyCtrlH, 0, tcell.ModCtrl | tcell.ModShift}, wantKey{BSpace, 0, nil}},                                      // actual "Ctrl+Shift+Backspace" keystroke
+		{giveKey{tcell.KeyCtrlH, rune(tcell.KeyCtrlH), tcell.ModShift | tcell.ModAlt}, wantKey{AltBS, 0, nil}},                     // actual "Shift+Alt+Backspace" keystroke
+		{giveKey{tcell.KeyCtrlH, 0, tcell.ModCtrl | tcell.ModAlt | tcell.ModShift}, wantKey{BSpace, 0, nil}},                       // actual "Ctrl+Shift+Alt+Backspace" keystroke
+		{giveKey{tcell.KeyCtrlH, rune(tcell.KeyCtrlH), tcell.ModCtrl}, wantKey{CtrlH, 0, nil}},                                     // actual "Ctrl+H" keystroke
+		{giveKey{tcell.KeyCtrlH, rune(tcell.KeyCtrlH), tcell.ModCtrl | tcell.ModAlt}, wantKey{CtrlAlt, 'h', nil}},                  // fabricated "Ctrl+Alt+H" keystroke
+		{giveKey{tcell.KeyCtrlH, rune(tcell.KeyCtrlH), tcell.ModCtrl | tcell.ModShift}, wantKey{CtrlH, 0, nil}},                    // actual "Ctrl+Shift+H" keystroke
+		{giveKey{tcell.KeyCtrlH, rune(tcell.KeyCtrlH), tcell.ModCtrl | tcell.ModAlt | tcell.ModShift}, wantKey{CtrlAlt, 'h', nil}}, // fabricated "Ctrl+Shift+Alt+H" keystroke
+
+		// section 4: (Alt+Shift)+Key(Up|Down|Left|Right)
+		{giveKey{tcell.KeyUp, 0, tcell.ModNone}, wantKey{Up, 0, nil}},
+		{giveKey{tcell.KeyDown, 0, tcell.ModAlt}, wantKey{AltDown, 0, nil}},
+		{giveKey{tcell.KeyLeft, 0, tcell.ModShift}, wantKey{SLeft, 0, nil}},
+		{giveKey{tcell.KeyRight, 0, tcell.ModShift | tcell.ModAlt}, wantKey{AltSRight, 0, nil}},
+		{giveKey{tcell.KeyUpLeft, 0, tcell.ModNone}, wantKey{Invalid, 0, nil}},    // fabricated, unhandled
+		{giveKey{tcell.KeyUpRight, 0, tcell.ModNone}, wantKey{Invalid, 0, nil}},   // fabricated, unhandled
+		{giveKey{tcell.KeyDownLeft, 0, tcell.ModNone}, wantKey{Invalid, 0, nil}},  // fabricated, unhandled
+		{giveKey{tcell.KeyDownRight, 0, tcell.ModNone}, wantKey{Invalid, 0, nil}}, // fabricated, unhandled
+		{giveKey{tcell.KeyCenter, 0, tcell.ModNone}, wantKey{Invalid, 0, nil}},    // fabricated, unhandled
+		// section 5: (Insert|Home|Delete|End|PgUp|PgDn|BackTab|F1-F12)
+		{giveKey{tcell.KeyInsert, 0, tcell.ModNone}, wantKey{Insert, 0, nil}},
+		{giveKey{tcell.KeyF1, 0, tcell.ModNone}, wantKey{F1, 0, nil}},
+		// section 6: (Ctrl+Alt)+'rune'
+		{giveKey{tcell.KeyRune, 'a', tcell.ModNone}, wantKey{Rune, 'a', nil}},
+		{giveKey{tcell.KeyRune, 'a', tcell.ModCtrl}, wantKey{Rune, 'a', nil}}, // fabricated
+		{giveKey{tcell.KeyRune, 'a', tcell.ModAlt}, wantKey{Alt, 'a', nil}},
+		{giveKey{tcell.KeyRune, 'A', tcell.ModAlt}, wantKey{Alt, 'A', nil}},
+		{giveKey{tcell.KeyRune, '`', tcell.ModAlt}, wantKey{Alt, '`', nil}},
+		/*
+			"Input method" in Windows Language options:
+			US: "US Keyboard" does not generate any characters (and thus any events) in Ctrl+Alt+[a-z] range
+			CS: "Czech keyboard"
+			DE: "German keyboard"
+
+			Note that right Alt is not just `tcell.ModAlt` on foreign language keyboards, but it is the AltGr `tcell.ModCtrl|tcell.ModAlt`.
+		*/
+		{giveKey{tcell.KeyRune, '{', tcell.ModCtrl | tcell.ModAlt}, wantKey{Rune, '{', nil}}, // CS: Ctrl+Alt+b = "{" // Note that this does not interfere with CtrlB, since the "b" is replaced with "{" on OS level
+		{giveKey{tcell.KeyRune, '$', tcell.ModCtrl | tcell.ModAlt}, wantKey{Rune, '$', nil}}, // CS: Ctrl+Alt+ů = "$"
+		{giveKey{tcell.KeyRune, '~', tcell.ModCtrl | tcell.ModAlt}, wantKey{Rune, '~', nil}}, // CS: Ctrl+Alt++ = "~"
+		{giveKey{tcell.KeyRune, '`', tcell.ModCtrl | tcell.ModAlt}, wantKey{Rune, '`', nil}}, // CS: Ctrl+Alt+ý,Space = "`" // this is dead key, space is required to emit the char
+
+		{giveKey{tcell.KeyRune, '{', tcell.ModCtrl | tcell.ModAlt}, wantKey{Rune, '{', nil}}, // DE: Ctrl+Alt+7 = "{"
+		{giveKey{tcell.KeyRune, '@', tcell.ModCtrl | tcell.ModAlt}, wantKey{Rune, '@', nil}}, // DE: Ctrl+Alt+q = "@"
+		{giveKey{tcell.KeyRune, 'µ', tcell.ModCtrl | tcell.ModAlt}, wantKey{Rune, 'µ', nil}}, // DE: Ctrl+Alt+m = "µ"
+
+		// section 7: Esc
+		// KeyEsc and KeyEscape are aliases for KeyESC
+		{giveKey{tcell.KeyEsc, rune(tcell.KeyEsc), tcell.ModNone}, wantKey{ESC, 0, nil}},               // fabricated
+		{giveKey{tcell.KeyESC, rune(tcell.KeyESC), tcell.ModNone}, wantKey{ESC, 0, nil}},               // unhandled
+		{giveKey{tcell.KeyEscape, rune(tcell.KeyEscape), tcell.ModNone}, wantKey{ESC, 0, nil}},         // fabricated, unhandled
+		{giveKey{tcell.KeyESC, rune(tcell.KeyESC), tcell.ModCtrl}, wantKey{ESC, 0, nil}},               // actual Ctrl+[ keystroke
+		{giveKey{tcell.KeyCtrlLeftSq, rune(tcell.KeyCtrlLeftSq), tcell.ModCtrl}, wantKey{ESC, 0, nil}}, // fabricated, unhandled
+
+		// section 8: Invalid
+		{giveKey{tcell.KeyRune, 'a', tcell.ModMeta}, wantKey{Rune, 'a', nil}}, // fabricated
+		{giveKey{tcell.KeyF24, 0, tcell.ModNone}, wantKey{Invalid, 0, nil}},
+		{giveKey{tcell.KeyHelp, 0, tcell.ModNone}, wantKey{Invalid, 0, nil}},   // fabricated, unhandled
+		{giveKey{tcell.KeyExit, 0, tcell.ModNone}, wantKey{Invalid, 0, nil}},   // fabricated, unhandled
+		{giveKey{tcell.KeyClear, 0, tcell.ModNone}, wantKey{Invalid, 0, nil}},  // unhandled, actual keystroke Numpad_5 with Numlock OFF
+		{giveKey{tcell.KeyCancel, 0, tcell.ModNone}, wantKey{Invalid, 0, nil}}, // fabricated, unhandled
+		{giveKey{tcell.KeyPrint, 0, tcell.ModNone}, wantKey{Invalid, 0, nil}},  // fabricated, unhandled
+		{giveKey{tcell.KeyPause, 0, tcell.ModNone}, wantKey{Invalid, 0, nil}},  // unhandled
+
+	}
+	r := NewFullscreenRenderer(&ColorTheme{}, false, false)
+	r.Init()
+
+	// run and evaluate the tests
+	for _, test := range tests {
+		// generate key event
+		giveEvent := tcell.NewEventKey(test.giveKey.Type, test.giveKey.Char, test.giveKey.Mods)
+		_screen.PostEventWait(giveEvent)
+		t.Logf("giveEvent = %T{key: %v, ch: %q (%[3]v), mod: %#04b}\n", giveEvent, giveEvent.Key(), giveEvent.Rune(), giveEvent.Modifiers())
+
+		// process the event in fzf and evaluate the test
+		gotEvent := r.GetChar()
+		// skip Resize events, those are sometimes put in the buffer outside of this test
+		for gotEvent.Type == Resize {
+			t.Logf("Resize swallowed")
+			gotEvent = r.GetChar()
+		}
+		t.Logf("wantEvent = %T{Type: %v, Char: %q (%[3]v)}\n", test.wantKey, test.wantKey.Type, test.wantKey.Char)
+		t.Logf("gotEvent = %T{Type: %v, Char: %q (%[3]v)}\n", gotEvent, gotEvent.Type, gotEvent.Char)
+
+		assert(t, "r.GetChar().Type", gotEvent.Type, test.wantKey.Type)
+		assert(t, "r.GetChar().Char", gotEvent.Char, test.wantKey.Char)
+	}
+
+	r.Close()
+}
+
+/*
+Quick reference
+---------------
+
+(tabstop=18)
+(this is not mapping table, it merely puts multiple constants ranges in one table)
+
+¹) the two columns are each other implicit alias
+²) explicit aliases here
+
+%v	section #	tcell ctrl key¹	tcell ctrl char¹	tcell alias²	tui constants	tcell named keys	tcell mods
+--	---------	--------------	---------------	-----------	-------------	----------------	----------
+0	2	KeyCtrlSpace	KeyNUL = ^@ 		Rune		ModNone
+1	1	KeyCtrlA	KeySOH = ^A		CtrlA		ModShift
+2	1	KeyCtrlB	KeySTX = ^B		CtrlB		ModCtrl
+3	1	KeyCtrlC	KeyETX = ^C		CtrlC
+4	1	KeyCtrlD	KeyEOT = ^D		CtrlD		ModAlt
+5	1	KeyCtrlE	KeyENQ = ^E		CtrlE
+6	1	KeyCtrlF	KeyACK = ^F		CtrlF
+7	1	KeyCtrlG	KeyBEL = ^G		CtrlG
+8	1	KeyCtrlH	KeyBS = ^H	KeyBackspace	CtrlH		ModMeta
+9	1	KeyCtrlI	KeyTAB = ^I	KeyTab	Tab
+10	1	KeyCtrlJ	KeyLF = ^J		CtrlJ
+11	1	KeyCtrlK	KeyVT = ^K		CtrlK
+12	1	KeyCtrlL	KeyFF = ^L		CtrlL
+13	1	KeyCtrlM	KeyCR = ^M	KeyEnter	CtrlM
+14	1	KeyCtrlN	KeySO = ^N		CtrlN
+15	1	KeyCtrlO	KeySI = ^O		CtrlO
+16	1	KeyCtrlP	KeyDLE = ^P		CtrlP
+17	1	KeyCtrlQ	KeyDC1 = ^Q		CtrlQ
+18	1	KeyCtrlR	KeyDC2 = ^R		CtrlR
+19	1	KeyCtrlS	KeyDC3 = ^S		CtrlS
+20	1	KeyCtrlT	KeyDC4 = ^T		CtrlT
+21	1	KeyCtrlU	KeyNAK = ^U		CtrlU
+22	1	KeyCtrlV	KeySYN = ^V		CtrlV
+23	1	KeyCtrlW	KeyETB = ^W		CtrlW
+24	1	KeyCtrlX	KeyCAN = ^X		CtrlX
+25	1	KeyCtrlY	KeyEM = ^Y		CtrlY
+26	1	KeyCtrlZ	KeySUB = ^Z		CtrlZ
+27	7	KeyCtrlLeftSq	KeyESC = ^[	KeyEsc, KeyEscape	ESC
+28	2	KeyCtrlBackslash	KeyFS = ^\		CtrlSpace
+29	2	KeyCtrlRightSq	KeyGS = ^]		CtrlBackSlash
+30	2	KeyCtrlCarat	KeyRS = ^^		CtrlRightBracket
+31	2	KeyCtrlUnderscore	KeyUS = ^_		CtrlCaret
+32					CtrlSlash
+33					Invalid
+34					Resize
+35					Mouse
+36					DoubleClick
+37					LeftClick
+38					RightClick
+39					BTab
+40					BSpace
+41					Del
+42					PgUp
+43					PgDn
+44					Up
+45					Down
+46					Left
+47					Right
+48					Home
+49					End
+50					Insert
+51					SUp
+52					SDown
+53					SLeft
+54					SRight
+55					F1
+56					F2
+57					F3
+58					F4
+59					F5
+60					F6
+61					F7
+62					F8
+63					F9
+64					F10
+65					F11
+66					F12
+67					Change
+68					BackwardEOF
+69					AltBS
+70					AltUp
+71					AltDown
+72					AltLeft
+73					AltRight
+74					AltSUp
+75					AltSDown
+76					AltSLeft
+77					AltSRight
+78					Alt
+79					CtrlAlt
+..
+127	3		  KeyDEL	KeyBackspace2
+..
+256	6					KeyRune
+257	4					KeyUp
+258	4					KeyDown
+259	4					KeyRight
+260	4					KeyLeft
+261	8					KeyUpLeft
+262	8					KeyUpRight
+263	8					KeyDownLeft
+264	8					KeyDownRight
+265	8					KeyCenter
+266	5					KeyPgUp
+267	5					KeyPgDn
+268	5					KeyHome
+269	5					KeyEnd
+270	5					KeyInsert
+271	5					KeyDelete
+272	8					KeyHelp
+273	8					KeyExit
+274	8					KeyClear
+275	8		  			KeyCancel
+276	8				  	KeyPrint
+277	8					KeyPause
+278	5					KeyBacktab
+279	5					KeyF1
+280	5					KeyF2
+281	5					KeyF3
+282	5					KeyF4
+283	5					KeyF5
+284	5					KeyF6
+285	5					KeyF7
+286	5					KeyF8
+287	5					KeyF9
+288	5					KeyF10
+289	5					KeyF11
+290	5					KeyF12
+291	8					KeyF13
+292	8					KeyF14
+293	8					KeyF15
+294	8					KeyF16
+295	8					KeyF17
+296	8					KeyF18
+297	8					KeyF19
+298	8					KeyF20
+299	8					KeyF21
+300	8					KeyF22
+301	8					KeyF23
+302	8					KeyF24
+303	8					KeyF25
+304	8					KeyF26
+305	8					KeyF27
+306	8					KeyF28
+307	8					KeyF29
+308	8					KeyF30
+309	8					KeyF31
+310	8					KeyF32
+311	8					KeyF33
+312	8					KeyF34
+313	8					KeyF35
+314	8					KeyF36
+315	8					KeyF37
+316	8					KeyF38
+317	8					KeyF39
+318	8					KeyF40
+319	8					KeyF41
+320	8					KeyF42
+321	8					KeyF43
+322	8					KeyF44
+323	8					KeyF45
+324	8					KeyF46
+325	8					KeyF47
+326	8					KeyF48
+327	8					KeyF49
+328	8					KeyF50
+329	8					KeyF51
+330	8					KeyF52
+331	8					KeyF53
+332	8					KeyF54
+333	8					KeyF55
+334	8					KeyF56
+335	8					KeyF57
+336	8					KeyF58
+337	8					KeyF59
+338	8					KeyF60
+339	8					KeyF61
+340	8					KeyF62
+341	8					KeyF63
+342	8					KeyF64
+--	---------	--------------	---------------	-----------	-------------	----------------	----------
+%v	section #	tcell ctrl key	tcell ctrl char	tcell alias	tui constants	tcell named keys	tcell mods
+*/

src/tui/ttyname_unix.go

@@ -0,0 +1,50 @@
+//go:build !windows
+
+package tui
+
+import (
+	"os"
+	"syscall"
+)
+
+var devPrefixes = [...]string{"/dev/pts/", "/dev/"}
+
+func ttyname() string {
+	var stderr syscall.Stat_t
+	if syscall.Fstat(2, &stderr) != nil {
+		return ""
+	}
+
+	for _, prefix := range devPrefixes {
+		files, err := os.ReadDir(prefix)
+		if err != nil {
+			continue
+		}
+
+		for _, file := range files {
+			info, err := file.Info()
+			if err != nil {
+				continue
+			}
+			if stat, ok := info.Sys().(*syscall.Stat_t); ok && stat.Rdev == stderr.Rdev {
+				return prefix + file.Name()
+			}
+		}
+	}
+	return ""
+}
+
+// TtyIn returns terminal device to be used as STDIN, falls back to os.Stdin
+func TtyIn() *os.File {
+	in, err := os.OpenFile(consoleDevice, syscall.O_RDONLY, 0)
+	if err != nil {
+		tty := ttyname()
+		if len(tty) > 0 {
+			if in, err := os.OpenFile(tty, syscall.O_RDONLY, 0); err == nil {
+				return in
+			}
+		}
+		return os.Stdin
+	}
+	return in
+}

src/tui/ttyname_windows.go

@@ -0,0 +1,14 @@
+//go:build windows
+
+package tui
+
+import "os"
+
+func ttyname() string {
+	return ""
+}
+
+// TtyIn on Windows returns os.Stdin
+func TtyIn() *os.File {
+	return os.Stdin
+}

src/tui/tui.go

@@ -0,0 +1,820 @@
+package tui
+
+import (
+	"fmt"
+	"os"
+	"strconv"
+	"time"
+
+	"github.com/junegunn/uniseg"
+)
+
+// Types of user action
+type EventType int
+
+const (
+	Rune EventType = iota
+
+	CtrlA
+	CtrlB
+	CtrlC
+	CtrlD
+	CtrlE
+	CtrlF
+	CtrlG
+	CtrlH
+	Tab
+	CtrlJ
+	CtrlK
+	CtrlL
+	CtrlM
+	CtrlN
+	CtrlO
+	CtrlP
+	CtrlQ
+	CtrlR
+	CtrlS
+	CtrlT
+	CtrlU
+	CtrlV
+	CtrlW
+	CtrlX
+	CtrlY
+	CtrlZ
+	ESC
+	CtrlSpace
+	CtrlDelete
+
+	// https://apple.stackexchange.com/questions/24261/how-do-i-send-c-that-is-control-slash-to-the-terminal
+	CtrlBackSlash
+	CtrlRightBracket
+	CtrlCaret
+	CtrlSlash
+
+	Invalid
+	Resize
+	Mouse
+	DoubleClick
+	LeftClick
+	RightClick
+	SLeftClick
+	SRightClick
+	ScrollUp
+	ScrollDown
+	SScrollUp
+	SScrollDown
+	PreviewScrollUp
+	PreviewScrollDown
+
+	BTab
+	BSpace
+
+	Del
+	PgUp
+	PgDn
+
+	Up
+	Down
+	Left
+	Right
+	Home
+	End
+	Insert
+
+	SUp
+	SDown
+	SLeft
+	SRight
+	SDelete
+
+	F1
+	F2
+	F3
+	F4
+	F5
+	F6
+	F7
+	F8
+	F9
+	F10
+	F11
+	F12
+
+	Change
+	BackwardEOF
+	Start
+	Load
+	Focus
+	One
+	Zero
+	Result
+
+	AltBS
+
+	AltUp
+	AltDown
+	AltLeft
+	AltRight
+
+	AltSUp
+	AltSDown
+	AltSLeft
+	AltSRight
+
+	Alt
+	CtrlAlt
+)
+
+func (t EventType) AsEvent() Event {
+	return Event{t, 0, nil}
+}
+
+func (t EventType) Int() int {
+	return int(t)
+}
+
+func (t EventType) Byte() byte {
+	return byte(t)
+}
+
+func (e Event) Comparable() Event {
+	// Ignore MouseEvent pointer
+	return Event{e.Type, e.Char, nil}
+}
+
+func Key(r rune) Event {
+	return Event{Rune, r, nil}
+}
+
+func AltKey(r rune) Event {
+	return Event{Alt, r, nil}
+}
+
+func CtrlAltKey(r rune) Event {
+	return Event{CtrlAlt, r, nil}
+}
+
+const (
+	doubleClickDuration = 500 * time.Millisecond
+)
+
+type Color int32
+
+func (c Color) IsDefault() bool {
+	return c == colDefault
+}
+
+func (c Color) is24() bool {
+	return c > 0 && (c&(1<<24)) > 0
+}
+
+type ColorAttr struct {
+	Color Color
+	Attr  Attr
+}
+
+func NewColorAttr() ColorAttr {
+	return ColorAttr{Color: colUndefined, Attr: AttrUndefined}
+}
+
+const (
+	colUndefined Color = -2
+	colDefault   Color = -1
+)
+
+const (
+	colBlack Color = iota
+	colRed
+	colGreen
+	colYellow
+	colBlue
+	colMagenta
+	colCyan
+	colWhite
+)
+
+type FillReturn int
+
+const (
+	FillContinue FillReturn = iota
+	FillNextLine
+	FillSuspend
+)
+
+type ColorPair struct {
+	fg   Color
+	bg   Color
+	attr Attr
+}
+
+func HexToColor(rrggbb string) Color {
+	r, _ := strconv.ParseInt(rrggbb[1:3], 16, 0)
+	g, _ := strconv.ParseInt(rrggbb[3:5], 16, 0)
+	b, _ := strconv.ParseInt(rrggbb[5:7], 16, 0)
+	return Color((1 << 24) + (r << 16) + (g << 8) + b)
+}
+
+func NewColorPair(fg Color, bg Color, attr Attr) ColorPair {
+	return ColorPair{fg, bg, attr}
+}
+
+func (p ColorPair) Fg() Color {
+	return p.fg
+}
+
+func (p ColorPair) Bg() Color {
+	return p.bg
+}
+
+func (p ColorPair) Attr() Attr {
+	return p.attr
+}
+
+func (p ColorPair) HasBg() bool {
+	return p.attr&Reverse == 0 && p.bg != colDefault ||
+		p.attr&Reverse > 0 && p.fg != colDefault
+}
+
+func (p ColorPair) merge(other ColorPair, except Color) ColorPair {
+	dup := p
+	dup.attr = dup.attr.Merge(other.attr)
+	if other.fg != except {
+		dup.fg = other.fg
+	}
+	if other.bg != except {
+		dup.bg = other.bg
+	}
+	return dup
+}
+
+func (p ColorPair) WithAttr(attr Attr) ColorPair {
+	dup := p
+	dup.attr = dup.attr.Merge(attr)
+	return dup
+}
+
+func (p ColorPair) MergeAttr(other ColorPair) ColorPair {
+	return p.WithAttr(other.attr)
+}
+
+func (p ColorPair) Merge(other ColorPair) ColorPair {
+	return p.merge(other, colUndefined)
+}
+
+func (p ColorPair) MergeNonDefault(other ColorPair) ColorPair {
+	return p.merge(other, colDefault)
+}
+
+type ColorTheme struct {
+	Colored          bool
+	Input            ColorAttr
+	Disabled         ColorAttr
+	Fg               ColorAttr
+	Bg               ColorAttr
+	PreviewFg        ColorAttr
+	PreviewBg        ColorAttr
+	DarkBg           ColorAttr
+	Gutter           ColorAttr
+	Prompt           ColorAttr
+	Match            ColorAttr
+	Current          ColorAttr
+	CurrentMatch     ColorAttr
+	Spinner          ColorAttr
+	Info             ColorAttr
+	Cursor           ColorAttr
+	Selected         ColorAttr
+	Header           ColorAttr
+	Separator        ColorAttr
+	Scrollbar        ColorAttr
+	Border           ColorAttr
+	PreviewBorder    ColorAttr
+	PreviewScrollbar ColorAttr
+	BorderLabel      ColorAttr
+	PreviewLabel     ColorAttr
+}
+
+type Event struct {
+	Type       EventType
+	Char       rune
+	MouseEvent *MouseEvent
+}
+
+func (e Event) Is(types ...EventType) bool {
+	for _, t := range types {
+		if e.Type == t {
+			return true
+		}
+	}
+	return false
+}
+
+type MouseEvent struct {
+	Y      int
+	X      int
+	S      int
+	Left   bool
+	Down   bool
+	Double bool
+	Mod    bool
+}
+
+type BorderShape int
+
+const (
+	BorderNone BorderShape = iota
+	BorderRounded
+	BorderSharp
+	BorderBold
+	BorderBlock
+	BorderThinBlock
+	BorderDouble
+	BorderHorizontal
+	BorderVertical
+	BorderTop
+	BorderBottom
+	BorderLeft
+	BorderRight
+)
+
+func (s BorderShape) HasRight() bool {
+	switch s {
+	case BorderNone, BorderLeft, BorderTop, BorderBottom, BorderHorizontal: // No right
+		return false
+	}
+	return true
+}
+
+func (s BorderShape) HasTop() bool {
+	switch s {
+	case BorderNone, BorderLeft, BorderRight, BorderBottom, BorderVertical: // No top
+		return false
+	}
+	return true
+}
+
+type BorderStyle struct {
+	shape       BorderShape
+	top         rune
+	bottom      rune
+	left        rune
+	right       rune
+	topLeft     rune
+	topRight    rune
+	bottomLeft  rune
+	bottomRight rune
+}
+
+type BorderCharacter int
+
+func MakeBorderStyle(shape BorderShape, unicode bool) BorderStyle {
+	if !unicode {
+		return BorderStyle{
+			shape:       shape,
+			top:         '-',
+			bottom:      '-',
+			left:        '|',
+			right:       '|',
+			topLeft:     '+',
+			topRight:    '+',
+			bottomLeft:  '+',
+			bottomRight: '+',
+		}
+	}
+	switch shape {
+	case BorderSharp:
+		return BorderStyle{
+			shape:       shape,
+			top:         '─',
+			bottom:      '─',
+			left:        '│',
+			right:       '│',
+			topLeft:     '┌',
+			topRight:    '┐',
+			bottomLeft:  '└',
+			bottomRight: '┘',
+		}
+	case BorderBold:
+		return BorderStyle{
+			shape:       shape,
+			top:         '━',
+			bottom:      '━',
+			left:        '┃',
+			right:       '┃',
+			topLeft:     '┏',
+			topRight:    '┓',
+			bottomLeft:  '┗',
+			bottomRight: '┛',
+		}
+	case BorderBlock:
+		// ▛▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▜
+		// ▌                  ▐
+		// ▙▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▟
+		return BorderStyle{
+			shape:       shape,
+			top:         '▀',
+			bottom:      '▄',
+			left:        '▌',
+			right:       '▐',
+			topLeft:     '▛',
+			topRight:    '▜',
+			bottomLeft:  '▙',
+			bottomRight: '▟',
+		}
+
+	case BorderThinBlock:
+		// 🭽▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔🭾
+		// ▏                  ▕
+		// 🭼▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁🭿
+		return BorderStyle{
+			shape:       shape,
+			top:         '▔',
+			bottom:      '▁',
+			left:        '▏',
+			right:       '▕',
+			topLeft:     '🭽',
+			topRight:    '🭾',
+			bottomLeft:  '🭼',
+			bottomRight: '🭿',
+		}
+
+	case BorderDouble:
+		return BorderStyle{
+			shape:       shape,
+			top:         '═',
+			bottom:      '═',
+			left:        '║',
+			right:       '║',
+			topLeft:     '╔',
+			topRight:    '╗',
+			bottomLeft:  '╚',
+			bottomRight: '╝',
+		}
+	}
+	return BorderStyle{
+		shape:       shape,
+		top:         '─',
+		bottom:      '─',
+		left:        '│',
+		right:       '│',
+		topLeft:     '╭',
+		topRight:    '╮',
+		bottomLeft:  '╰',
+		bottomRight: '╯',
+	}
+}
+
+func MakeTransparentBorder() BorderStyle {
+	return BorderStyle{
+		shape:       BorderRounded,
+		top:         ' ',
+		bottom:      ' ',
+		left:        ' ',
+		right:       ' ',
+		topLeft:     ' ',
+		topRight:    ' ',
+		bottomLeft:  ' ',
+		bottomRight: ' '}
+}
+
+type TermSize struct {
+	Lines    int
+	Columns  int
+	PxWidth  int
+	PxHeight int
+}
+
+type Renderer interface {
+	Init()
+	Resize(maxHeightFunc func(int) int)
+	Pause(clear bool)
+	Resume(clear bool, sigcont bool)
+	Clear()
+	RefreshWindows(windows []Window)
+	Refresh()
+	Close()
+	PassThrough(string)
+	NeedScrollbarRedraw() bool
+
+	GetChar() Event
+
+	Top() int
+	MaxX() int
+	MaxY() int
+
+	Size() TermSize
+
+	NewWindow(top int, left int, width int, height int, preview bool, borderStyle BorderStyle) Window
+}
+
+type Window interface {
+	Top() int
+	Left() int
+	Width() int
+	Height() int
+
+	DrawBorder()
+	DrawHBorder()
+	Refresh()
+	FinishFill()
+	Close()
+
+	X() int
+	Y() int
+	Enclose(y int, x int) bool
+
+	Move(y int, x int)
+	MoveAndClear(y int, x int)
+	Print(text string)
+	CPrint(color ColorPair, text string)
+	Fill(text string) FillReturn
+	CFill(fg Color, bg Color, attr Attr, text string) FillReturn
+	Erase()
+	EraseMaybe() bool
+}
+
+type FullscreenRenderer struct {
+	theme        *ColorTheme
+	mouse        bool
+	forceBlack   bool
+	prevDownTime time.Time
+	clicks       [][2]int
+}
+
+func NewFullscreenRenderer(theme *ColorTheme, forceBlack bool, mouse bool) Renderer {
+	r := &FullscreenRenderer{
+		theme:        theme,
+		mouse:        mouse,
+		forceBlack:   forceBlack,
+		prevDownTime: time.Unix(0, 0),
+		clicks:       [][2]int{}}
+	return r
+}
+
+var (
+	Default16 *ColorTheme
+	Dark256   *ColorTheme
+	Light256  *ColorTheme
+
+	ColPrompt               ColorPair
+	ColNormal               ColorPair
+	ColInput                ColorPair
+	ColDisabled             ColorPair
+	ColMatch                ColorPair
+	ColCursor               ColorPair
+	ColCursorEmpty          ColorPair
+	ColSelected             ColorPair
+	ColCurrent              ColorPair
+	ColCurrentMatch         ColorPair
+	ColCurrentCursor        ColorPair
+	ColCurrentCursorEmpty   ColorPair
+	ColCurrentSelected      ColorPair
+	ColCurrentSelectedEmpty ColorPair
+	ColSpinner              ColorPair
+	ColInfo                 ColorPair
+	ColHeader               ColorPair
+	ColSeparator            ColorPair
+	ColScrollbar            ColorPair
+	ColBorder               ColorPair
+	ColPreview              ColorPair
+	ColPreviewBorder        ColorPair
+	ColBorderLabel          ColorPair
+	ColPreviewLabel         ColorPair
+	ColPreviewScrollbar     ColorPair
+	ColPreviewSpinner       ColorPair
+)
+
+func EmptyTheme() *ColorTheme {
+	return &ColorTheme{
+		Colored:          true,
+		Input:            ColorAttr{colUndefined, AttrUndefined},
+		Fg:               ColorAttr{colUndefined, AttrUndefined},
+		Bg:               ColorAttr{colUndefined, AttrUndefined},
+		DarkBg:           ColorAttr{colUndefined, AttrUndefined},
+		Prompt:           ColorAttr{colUndefined, AttrUndefined},
+		Match:            ColorAttr{colUndefined, AttrUndefined},
+		Current:          ColorAttr{colUndefined, AttrUndefined},
+		CurrentMatch:     ColorAttr{colUndefined, AttrUndefined},
+		Spinner:          ColorAttr{colUndefined, AttrUndefined},
+		Info:             ColorAttr{colUndefined, AttrUndefined},
+		Cursor:           ColorAttr{colUndefined, AttrUndefined},
+		Selected:         ColorAttr{colUndefined, AttrUndefined},
+		Header:           ColorAttr{colUndefined, AttrUndefined},
+		Border:           ColorAttr{colUndefined, AttrUndefined},
+		BorderLabel:      ColorAttr{colUndefined, AttrUndefined},
+		Disabled:         ColorAttr{colUndefined, AttrUndefined},
+		PreviewFg:        ColorAttr{colUndefined, AttrUndefined},
+		PreviewBg:        ColorAttr{colUndefined, AttrUndefined},
+		Gutter:           ColorAttr{colUndefined, AttrUndefined},
+		PreviewBorder:    ColorAttr{colUndefined, AttrUndefined},
+		PreviewScrollbar: ColorAttr{colUndefined, AttrUndefined},
+		PreviewLabel:     ColorAttr{colUndefined, AttrUndefined},
+		Separator:        ColorAttr{colUndefined, AttrUndefined},
+		Scrollbar:        ColorAttr{colUndefined, AttrUndefined},
+	}
+}
+
+func NoColorTheme() *ColorTheme {
+	return &ColorTheme{
+		Colored:          false,
+		Input:            ColorAttr{colDefault, AttrUndefined},
+		Fg:               ColorAttr{colDefault, AttrUndefined},
+		Bg:               ColorAttr{colDefault, AttrUndefined},
+		DarkBg:           ColorAttr{colDefault, AttrUndefined},
+		Prompt:           ColorAttr{colDefault, AttrUndefined},
+		Match:            ColorAttr{colDefault, Underline},
+		Current:          ColorAttr{colDefault, Reverse},
+		CurrentMatch:     ColorAttr{colDefault, Reverse | Underline},
+		Spinner:          ColorAttr{colDefault, AttrUndefined},
+		Info:             ColorAttr{colDefault, AttrUndefined},
+		Cursor:           ColorAttr{colDefault, AttrUndefined},
+		Selected:         ColorAttr{colDefault, AttrUndefined},
+		Header:           ColorAttr{colDefault, AttrUndefined},
+		Border:           ColorAttr{colDefault, AttrUndefined},
+		BorderLabel:      ColorAttr{colDefault, AttrUndefined},
+		Disabled:         ColorAttr{colDefault, AttrUndefined},
+		PreviewFg:        ColorAttr{colDefault, AttrUndefined},
+		PreviewBg:        ColorAttr{colDefault, AttrUndefined},
+		Gutter:           ColorAttr{colDefault, AttrUndefined},
+		PreviewBorder:    ColorAttr{colDefault, AttrUndefined},
+		PreviewScrollbar: ColorAttr{colDefault, AttrUndefined},
+		PreviewLabel:     ColorAttr{colDefault, AttrUndefined},
+		Separator:        ColorAttr{colDefault, AttrUndefined},
+		Scrollbar:        ColorAttr{colDefault, AttrUndefined},
+	}
+}
+
+func errorExit(message string) {
+	fmt.Fprintln(os.Stderr, message)
+	os.Exit(2)
+}
+
+func init() {
+	Default16 = &ColorTheme{
+		Colored:          true,
+		Input:            ColorAttr{colDefault, AttrUndefined},
+		Fg:               ColorAttr{colDefault, AttrUndefined},
+		Bg:               ColorAttr{colDefault, AttrUndefined},
+		DarkBg:           ColorAttr{colBlack, AttrUndefined},
+		Prompt:           ColorAttr{colBlue, AttrUndefined},
+		Match:            ColorAttr{colGreen, AttrUndefined},
+		Current:          ColorAttr{colYellow, AttrUndefined},
+		CurrentMatch:     ColorAttr{colGreen, AttrUndefined},
+		Spinner:          ColorAttr{colGreen, AttrUndefined},
+		Info:             ColorAttr{colWhite, AttrUndefined},
+		Cursor:           ColorAttr{colRed, AttrUndefined},
+		Selected:         ColorAttr{colMagenta, AttrUndefined},
+		Header:           ColorAttr{colCyan, AttrUndefined},
+		Border:           ColorAttr{colBlack, AttrUndefined},
+		BorderLabel:      ColorAttr{colWhite, AttrUndefined},
+		Disabled:         ColorAttr{colUndefined, AttrUndefined},
+		PreviewFg:        ColorAttr{colUndefined, AttrUndefined},
+		PreviewBg:        ColorAttr{colUndefined, AttrUndefined},
+		Gutter:           ColorAttr{colUndefined, AttrUndefined},
+		PreviewBorder:    ColorAttr{colUndefined, AttrUndefined},
+		PreviewScrollbar: ColorAttr{colUndefined, AttrUndefined},
+		PreviewLabel:     ColorAttr{colUndefined, AttrUndefined},
+		Separator:        ColorAttr{colUndefined, AttrUndefined},
+		Scrollbar:        ColorAttr{colUndefined, AttrUndefined},
+	}
+	Dark256 = &ColorTheme{
+		Colored:          true,
+		Input:            ColorAttr{colDefault, AttrUndefined},
+		Fg:               ColorAttr{colDefault, AttrUndefined},
+		Bg:               ColorAttr{colDefault, AttrUndefined},
+		DarkBg:           ColorAttr{236, AttrUndefined},
+		Prompt:           ColorAttr{110, AttrUndefined},
+		Match:            ColorAttr{108, AttrUndefined},
+		Current:          ColorAttr{254, AttrUndefined},
+		CurrentMatch:     ColorAttr{151, AttrUndefined},
+		Spinner:          ColorAttr{148, AttrUndefined},
+		Info:             ColorAttr{144, AttrUndefined},
+		Cursor:           ColorAttr{161, AttrUndefined},
+		Selected:         ColorAttr{168, AttrUndefined},
+		Header:           ColorAttr{109, AttrUndefined},
+		Border:           ColorAttr{59, AttrUndefined},
+		BorderLabel:      ColorAttr{145, AttrUndefined},
+		Disabled:         ColorAttr{colUndefined, AttrUndefined},
+		PreviewFg:        ColorAttr{colUndefined, AttrUndefined},
+		PreviewBg:        ColorAttr{colUndefined, AttrUndefined},
+		Gutter:           ColorAttr{colUndefined, AttrUndefined},
+		PreviewBorder:    ColorAttr{colUndefined, AttrUndefined},
+		PreviewScrollbar: ColorAttr{colUndefined, AttrUndefined},
+		PreviewLabel:     ColorAttr{colUndefined, AttrUndefined},
+		Separator:        ColorAttr{colUndefined, AttrUndefined},
+		Scrollbar:        ColorAttr{colUndefined, AttrUndefined},
+	}
+	Light256 = &ColorTheme{
+		Colored:          true,
+		Input:            ColorAttr{colDefault, AttrUndefined},
+		Fg:               ColorAttr{colDefault, AttrUndefined},
+		Bg:               ColorAttr{colDefault, AttrUndefined},
+		DarkBg:           ColorAttr{251, AttrUndefined},
+		Prompt:           ColorAttr{25, AttrUndefined},
+		Match:            ColorAttr{66, AttrUndefined},
+		Current:          ColorAttr{237, AttrUndefined},
+		CurrentMatch:     ColorAttr{23, AttrUndefined},
+		Spinner:          ColorAttr{65, AttrUndefined},
+		Info:             ColorAttr{101, AttrUndefined},
+		Cursor:           ColorAttr{161, AttrUndefined},
+		Selected:         ColorAttr{168, AttrUndefined},
+		Header:           ColorAttr{31, AttrUndefined},
+		Border:           ColorAttr{145, AttrUndefined},
+		BorderLabel:      ColorAttr{59, AttrUndefined},
+		Disabled:         ColorAttr{colUndefined, AttrUndefined},
+		PreviewFg:        ColorAttr{colUndefined, AttrUndefined},
+		PreviewBg:        ColorAttr{colUndefined, AttrUndefined},
+		Gutter:           ColorAttr{colUndefined, AttrUndefined},
+		PreviewBorder:    ColorAttr{colUndefined, AttrUndefined},
+		PreviewScrollbar: ColorAttr{colUndefined, AttrUndefined},
+		PreviewLabel:     ColorAttr{colUndefined, AttrUndefined},
+		Separator:        ColorAttr{colUndefined, AttrUndefined},
+		Scrollbar:        ColorAttr{colUndefined, AttrUndefined},
+	}
+}
+
+func initTheme(theme *ColorTheme, baseTheme *ColorTheme, forceBlack bool) {
+	if forceBlack {
+		theme.Bg = ColorAttr{colBlack, AttrUndefined}
+	}
+
+	o := func(a ColorAttr, b ColorAttr) ColorAttr {
+		c := a
+		if b.Color != colUndefined {
+			c.Color = b.Color
+		}
+		if b.Attr != AttrUndefined {
+			c.Attr = b.Attr
+		}
+		return c
+	}
+	theme.Input = o(baseTheme.Input, theme.Input)
+	theme.Fg = o(baseTheme.Fg, theme.Fg)
+	theme.Bg = o(baseTheme.Bg, theme.Bg)
+	theme.DarkBg = o(baseTheme.DarkBg, theme.DarkBg)
+	theme.Prompt = o(baseTheme.Prompt, theme.Prompt)
+	theme.Match = o(baseTheme.Match, theme.Match)
+	theme.Current = o(baseTheme.Current, theme.Current)
+	theme.CurrentMatch = o(baseTheme.CurrentMatch, theme.CurrentMatch)
+	theme.Spinner = o(baseTheme.Spinner, theme.Spinner)
+	theme.Info = o(baseTheme.Info, theme.Info)
+	theme.Cursor = o(baseTheme.Cursor, theme.Cursor)
+	theme.Selected = o(baseTheme.Selected, theme.Selected)
+	theme.Header = o(baseTheme.Header, theme.Header)
+	theme.Border = o(baseTheme.Border, theme.Border)
+	theme.BorderLabel = o(baseTheme.BorderLabel, theme.BorderLabel)
+
+	// These colors are not defined in the base themes
+	theme.Disabled = o(theme.Input, theme.Disabled)
+	theme.Gutter = o(theme.DarkBg, theme.Gutter)
+	theme.PreviewFg = o(theme.Fg, theme.PreviewFg)
+	theme.PreviewBg = o(theme.Bg, theme.PreviewBg)
+	theme.PreviewLabel = o(theme.BorderLabel, theme.PreviewLabel)
+	theme.PreviewBorder = o(theme.Border, theme.PreviewBorder)
+	theme.Separator = o(theme.Border, theme.Separator)
+	theme.Scrollbar = o(theme.Border, theme.Scrollbar)
+	theme.PreviewScrollbar = o(theme.PreviewBorder, theme.PreviewScrollbar)
+
+	initPalette(theme)
+}
+
+func initPalette(theme *ColorTheme) {
+	pair := func(fg, bg ColorAttr) ColorPair {
+		if fg.Color == colDefault && (fg.Attr&Reverse) > 0 {
+			bg.Color = colDefault
+		}
+		return ColorPair{fg.Color, bg.Color, fg.Attr}
+	}
+	blank := theme.Fg
+	blank.Attr = AttrRegular
+
+	ColPrompt = pair(theme.Prompt, theme.Bg)
+	ColNormal = pair(theme.Fg, theme.Bg)
+	ColInput = pair(theme.Input, theme.Bg)
+	ColDisabled = pair(theme.Disabled, theme.Bg)
+	ColMatch = pair(theme.Match, theme.Bg)
+	ColCursor = pair(theme.Cursor, theme.Gutter)
+	ColCursorEmpty = pair(blank, theme.Gutter)
+	ColSelected = pair(theme.Selected, theme.Gutter)
+	ColCurrent = pair(theme.Current, theme.DarkBg)
+	ColCurrentMatch = pair(theme.CurrentMatch, theme.DarkBg)
+	ColCurrentCursor = pair(theme.Cursor, theme.DarkBg)
+	ColCurrentCursorEmpty = pair(blank, theme.DarkBg)
+	ColCurrentSelected = pair(theme.Selected, theme.DarkBg)
+	ColCurrentSelectedEmpty = pair(blank, theme.DarkBg)
+	ColSpinner = pair(theme.Spinner, theme.Bg)
+	ColInfo = pair(theme.Info, theme.Bg)
+	ColHeader = pair(theme.Header, theme.Bg)
+	ColSeparator = pair(theme.Separator, theme.Bg)
+	ColScrollbar = pair(theme.Scrollbar, theme.Bg)
+	ColBorder = pair(theme.Border, theme.Bg)
+	ColBorderLabel = pair(theme.BorderLabel, theme.Bg)
+	ColPreviewLabel = pair(theme.PreviewLabel, theme.PreviewBg)
+	ColPreview = pair(theme.PreviewFg, theme.PreviewBg)
+	ColPreviewBorder = pair(theme.PreviewBorder, theme.PreviewBg)
+	ColPreviewScrollbar = pair(theme.PreviewScrollbar, theme.PreviewBg)
+	ColPreviewSpinner = pair(theme.Spinner, theme.PreviewBg)
+}
+
+func runeWidth(r rune) int {
+	return uniseg.StringWidth(string(r))
+}

src/tui/tui_test.go

@@ -0,0 +1,20 @@
+package tui
+
+import "testing"
+
+func TestHexToColor(t *testing.T) {
+	assert := func(expr string, r, g, b int) {
+		color := HexToColor(expr)
+		if !color.is24() ||
+			int((color>>16)&0xff) != r ||
+			int((color>>8)&0xff) != g ||
+			int((color)&0xff) != b {
+			t.Fail()
+		}
+	}
+
+	assert("#ff0000", 255, 0, 0)
+	assert("#010203", 1, 2, 3)
+	assert("#102030", 16, 32, 48)
+	assert("#ffffff", 255, 255, 255)
+}

src/update_assets.rb

@@ -1,42 +0,0 @@
-#!/usr/bin/env ruby
-
-# http://www.rubydoc.info/github/rest-client/rest-client/RestClient
-require 'rest_client'
-
-if ARGV.length < 3
-  puts "usage: #$0 <token> <version> <files...>"
-  exit 1
-end
-
-token, version, *files = ARGV
-base = "https://api.github.com/repos/junegunn/fzf-bin/releases"
-
-# List releases
-rels = JSON.parse(RestClient.get(base, :authorization => "token #{token}"))
-rel = rels.find { |r| r['tag_name'] == version }
-unless rel
-  puts "#{version} not found"
-  exit 1
-end
-
-# List assets
-assets = Hash[rel['assets'].map { |a| a.values_at *%w[name id] }]
-
-files.select { |f| File.exists? f }.each do |file|
-  name = File.basename file
-
-  if asset_id = assets[name]
-    puts "#{name} found. Deleting asset id #{asset_id}."
-    RestClient.delete "#{base}/assets/#{asset_id}",
-      :authorization => "token #{token}"
-  else
-    puts "#{name} not found"
-  end
-
-  puts "Uploading #{name}"
-  RestClient.post(
-    "#{base.sub 'api', 'uploads'}/#{rel['id']}/assets?name=#{name}",
-    File.read(file),
-    :authorization => "token #{token}",
-    :content_type  => "application/octet-stream")
-end

src/util/atomicbool.go

@@ -1,32 +1,34 @@
 package util
 
-import "sync"
+import (
+	"sync/atomic"
+)
+
+func convertBoolToInt32(b bool) int32 {
+	if b {
+		return 1
+	}
+	return 0
+}
 
 // AtomicBool is a boxed-class that provides synchronized access to the
 // underlying boolean value
 type AtomicBool struct {
-	mutex sync.Mutex
-	state bool
+	state int32 // "1" is true, "0" is false
 }
 
 // NewAtomicBool returns a new AtomicBool
 func NewAtomicBool(initialState bool) *AtomicBool {
-	return &AtomicBool{
-		mutex: sync.Mutex{},
-		state: initialState}
+	return &AtomicBool{state: convertBoolToInt32(initialState)}
 }
 
 // Get returns the current boolean value synchronously
 func (a *AtomicBool) Get() bool {
-	a.mutex.Lock()
-	defer a.mutex.Unlock()
-	return a.state
+	return atomic.LoadInt32(&a.state) == 1
 }
 
 // Set updates the boolean value synchronously
 func (a *AtomicBool) Set(newState bool) bool {
-	a.mutex.Lock()
-	defer a.mutex.Unlock()
-	a.state = newState
-	return a.state
+	atomic.StoreInt32(&a.state, convertBoolToInt32(newState))
+	return newState
 }