0.24.0

* Fix: barbled multibyte text(exe. Japanese).

* fixup

Co-authored-by: Junegunn Choi <junegunn.c@gmail.com>

.github/ISSUE_TEMPLATE.md

@@ -0,0 +1,22 @@
+<!-- ISSUES NOT FOLLOWING THIS TEMPLATE WILL BE CLOSED AND DELETED -->
+
+<!-- Check all that apply [x] -->
+
+- [ ] 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
+    - [ ] Windows
+    - [ ] Etc.
+- Shell
+    - [ ] bash
+    - [ ] zsh
+    - [ ] fish
+    
+## Problem / Steps to reproduce
+

.gitignore

@@ -1,2 +1,14 @@
+bin/fzf
+bin/fzf.exe
+dist
+target
 pkg
 Gemfile.lock
+.DS_Store
+doc/tags
+vendor
+gopath
+*.zwc
+fzf
+tmp
+*.patch

.gon.hcl

@@ -0,0 +1,11 @@
+source = ["./dist/fzf-macos_darwin_amd64/fzf"]
+bundle_id = "kr.junegunn.fzf"
+
+apple_id {
+  username = "junegunn.c@gmail.com"
+  password = "@env:AC_PASSWORD"
+}
+
+sign {
+  application_identity = "Apple Development: junegunn.c@gmail.com"
+}

.goreleaser.yml

@@ -0,0 +1,69 @@
+---
+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: gon .gon.hcl
+
+  - goos:
+      - linux
+      - windows
+      - freebsd
+      - openbsd
+    goarch:
+      - amd64
+      - arm
+      - arm64
+    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 }}"
+    format: tar.gz
+    format_overrides:
+      - goos: windows
+        format: zip
+    files:
+      - non-existent*
+
+release:
+  github:
+    owner: junegunn
+    name: fzf
+  prerelease: auto
+  name_template: '{{ .Tag }}'
+
+snapshot:
+  name_template: "{{ .Tag }}-devel"
+
+changelog:
+  sort: asc
+  filters:
+    exclude:
+      - README
+      - test

.rubocop.yml

@@ -0,0 +1,28 @@
+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

.travis.yml

@@ -0,0 +1,28 @@
+language: go
+go:
+  - "1.14"
+env: GO111MODULE=on
+os:
+  - linux
+  - osx
+dist: bionic
+addons:
+  apt:
+    packages:
+      - fish
+      - zsh
+    sources:
+      sourceline: ppa:fish-shell/release-3
+  homebrew:
+    packages:
+      - fish
+      - tmux
+    update: true
+install: gem install --no-document minitest:5.14.2 rubocop:1.0.0 rubocop-minitest:0.10.1 rubocop-performance:1.8.1
+script:
+  - make test
+  # LC_ALL=C to avoid escape codes in
+  # printf %q $'\355\205\214\354\212\244\355\212\270' on macOS. Bash on
+  # macOS is built without HANDLE_MULTIBYTE?
+  - make install && ./install --all && LC_ALL=C tmux new-session -d && ruby test/test_go.rb --verbose
+  - rubocop --require rubocop-minitest --require rubocop-performance

BUILD.md

@@ -0,0 +1,51 @@
+Building fzf
+============
+
+Build instructions
+------------------
+
+### Prerequisites
+
+- Go 1.11 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 32-bit and 64-bit executables and tarballs in target
+make release
+
+# Make release archives for all supported platforms in target
+make release-all
+```
+
+### Using `go get`
+
+Alternatively, you can build fzf directly with `go get` command without
+manually cloning the repository.
+
+```sh
+go get -u github.com/junegunn/fzf
+```
+
+Third-party libraries used
+--------------------------
+
+- [mattn/go-runewidth](https://github.com/mattn/go-runewidth)
+    - Licensed under [MIT](http://mattn.mit-license.org)
+- [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 +1,11 @@
+FROM archlinux/base:latest
+RUN pacman -Sy && pacman --noconfirm -S awk git tmux zsh fish ruby procps go make gcc
+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
+CMD tmux new 'set -o pipefail; ruby /fzf/test/test_go.rb | tee out && touch ok' && cat out && [ -e ok ]

LICENSE

@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2013-2020 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.

Makefile

@@ -0,0 +1,129 @@
+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)
+
+VERSION        := $(shell git describe --abbrev=0)
+VERSION_TRIM   := $(shell sed "s/-.*//" <<< $(VERSION))
+VERSION_REGEX  := $(subst .,\.,$(VERSION_TRIM))
+REVISION       := $(shell git log -n 1 --pretty=format:%h -- $(SOURCES))
+BUILD_FLAGS    := -a -ldflags "-X main.version=$(VERSION) -X main.revision=$(REVISION) -w '-extldflags=$(LDFLAGS)'" -tags "$(TAGS)"
+
+BINARY64       := fzf-$(GOOS)_amd64
+BINARYARM5     := fzf-$(GOOS)_arm5
+BINARYARM6     := fzf-$(GOOS)_arm6
+BINARYARM7     := fzf-$(GOOS)_arm7
+BINARYARM8     := fzf-$(GOOS)_arm8
+BINARYPPC64LE  := fzf-$(GOOS)_ppc64le
+
+# 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),armv5l)
+	BINARY := $(BINARYARM5)
+else ifeq ($(UNAME_M),armv6l)
+	BINARY := $(BINARYARM6)
+else ifeq ($(UNAME_M),armv7l)
+	BINARY := $(BINARYARM7)
+else ifeq ($(UNAME_M),armv8l)
+	BINARY := $(BINARYARM8)
+else ifeq ($(UNAME_M),aarch64)
+	BINARY := $(BINARYARM8)
+else ifeq ($(UNAME_M),ppc64le)
+	BINARY := $(BINARYPPC64LE)
+else
+$(error Build on $(UNAME_M) is not supported, yet.)
+endif
+
+all: target/$(BINARY)
+
+test: $(SOURCES)
+	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
+
+install: bin/fzf
+
+build:
+	goreleaser --rm-dist --snapshot
+
+release:
+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)$$ CHANGELOG.md
+	grep -qF '"fzf $(VERSION_TRIM)"' man/man1/fzf.1
+	grep -qF '"fzf $(VERSION_TRIM)"' man/man1/fzf-tmux.1
+	grep -qF $(VERSION) install
+	grep -qF $(VERSION) install.ps1
+
+	# Make release note out of CHANGELOG.md
+	sed -n '/^$(VERSION_REGEX)$$/,/^[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 --rm-dist --release-notes tmp/release-note
+
+	# Push to master
+	git checkout master
+	git push origin master
+
+	# Delete temp branch
+	git push origin --delete temp
+
+clean:
+	$(RM) -r dist target
+
+target/$(BINARY64): $(SOURCES)
+	GOARCH=amd64 $(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 $@
+
+bin/fzf: target/$(BINARY) | bin
+	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 build release test install clean docker docker-test update

README-VIM.md

@@ -0,0 +1,449 @@
+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 git
+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 git
+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 }'))
+  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
+let g:fzf_layout = { 'window': { 'width': 0.9, 'height': 0.6 } }
+
+" - 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)    |
+  | `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                             |
+  | `prompt`              | Prompt before query (`> `)                            |
+
+- `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                   |
+| `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]]
+    - `border` [string default `rounded`]: Border style
+        - `rounded` / `sharp` / `horizontal` / `vertical` / `top` / `bottom` / `left` / `right` / `none`
+
+`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 `sink*`) 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
+
+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%'}`
+
+#### 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]]
+" - highlight [string default 'Comment']: Highlight group for border
+" - 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 use a non-popup layout (e.g. `{'down': '40%'}`) on Neovim,
+you might want to temporarily disable the statusline for a cleaner look.
+
+```vim
+if has('nvim') && !exists('g:fzf_layout')
+  autocmd! FileType fzf
+  autocmd  FileType fzf set laststatus=0 noshowmode noruler
+    \| autocmd BufLeave <buffer> set laststatus=2 showmode ruler
+endif
+```
+
+[License](LICENSE)
+------------------
+
+The MIT License (MIT)
+
+Copyright (c) 2013-2020 Junegunn Choi

README.md

@@ -1,85 +1,190 @@
-fzf - Fuzzy finder for your shell
-=================================
+<img src="https://raw.githubusercontent.com/junegunn/i/master/fzf.png" height="170" alt="fzf - a command-line fuzzy finder"> [![travis-ci](https://travis-ci.org/junegunn/fzf.svg?branch=master)](https://travis-ci.org/junegunn/fzf)
+===
 
-fzf is a general-purpose fuzzy finder for your shell.
+fzf is a general-purpose command-line fuzzy finder.
 
-![](https://raw.github.com/junegunn/i/master/fzf.gif)
+<img src="https://raw.githubusercontent.com/junegunn/i/master/fzf-preview.png" width=640>
 
-It was heavily inspired by [ctrlp.vim](https://github.com/kien/ctrlp.vim) and
-the likes.
+It's an interactive Unix filter for command-line that can be used with any
+list; files, command history, processes, hostnames, bookmarks, git commits,
+etc.
 
-Requirements
-------------
+Pros
+----
 
-fzf requires Ruby (>= 1.8.5).
+- Portable, no dependencies
+- Blazingly fast
+- The most comprehensive feature set
+- Flexible layout
+- Batteries included
+    - Vim/Neovim plugin, key bindings and fuzzy auto-completion
+
+Table of Contents
+-----------------
+
+<!-- vim-markdown-toc GFM -->
+
+* [Installation](#installation)
+  * [Using Homebrew or Linuxbrew](#using-homebrew-or-linuxbrew)
+  * [Using git](#using-git)
+  * [Using Linux package managers](#using-linux-package-managers)
+  * [Windows](#windows)
+  * [As Vim plugin](#as-vim-plugin)
+* [Upgrading fzf](#upgrading-fzf)
+* [Building fzf](#building-fzf)
+* [Usage](#usage)
+    * [Using the finder](#using-the-finder)
+    * [Layout](#layout)
+    * [Search syntax](#search-syntax)
+    * [Environment variables](#environment-variables)
+    * [Options](#options)
+    * [Demo](#demo)
+* [Examples](#examples)
+* [`fzf-tmux` script](#fzf-tmux-script)
+* [Key bindings for command-line](#key-bindings-for-command-line)
+* [Fuzzy completion for bash and zsh](#fuzzy-completion-for-bash-and-zsh)
+    * [Files and directories](#files-and-directories)
+    * [Process IDs](#process-ids)
+    * [Host names](#host-names)
+    * [Environment variables / Aliases](#environment-variables--aliases)
+    * [Settings](#settings)
+    * [Supported commands](#supported-commands)
+    * [Custom fuzzy completion](#custom-fuzzy-completion)
+* [Vim plugin](#vim-plugin)
+* [Advanced topics](#advanced-topics)
+  * [Performance](#performance)
+  * [Executing external programs](#executing-external-programs)
+  * [Reloading the candidate list](#reloading-the-candidate-list)
+    * [1. Update the list of processes by pressing CTRL-R](#1-update-the-list-of-processes-by-pressing-ctrl-r)
+    * [2. Switch between sources by pressing CTRL-D or CTRL-F](#2-switch-between-sources-by-pressing-ctrl-d-or-ctrl-f)
+    * [3. Interactive ripgrep integration](#3-interactive-ripgrep-integration)
+  * [Preview window](#preview-window)
+* [Tips](#tips)
+    * [Respecting `.gitignore`](#respecting-gitignore)
+    * [Fish shell](#fish-shell)
+* [Related projects](#related-projects)
+* [License](#license)
+
+<!-- vim-markdown-toc -->
 
 Installation
 ------------
 
-Download [fzf executable](https://raw.github.com/junegunn/fzf/master/fzf) and
-put it somewhere in your search $PATH.
+fzf project consists of the following components:
+
+- `fzf` executable
+- `fzf-tmux` script for launching fzf in a tmux pane
+- Shell extensions
+    - Key bindings (`CTRL-T`, `CTRL-R`, and `ALT-C`) (bash, zsh, fish)
+    - Fuzzy auto-completion (bash, zsh)
+- Vim/Neovim plugin
+
+You can [download fzf executable][bin] alone if you don't need the extra
+stuff.
+
+[bin]: https://github.com/junegunn/fzf/releases
+
+### Using Homebrew or Linuxbrew
+
+You can use [Homebrew](http://brew.sh/) or [Linuxbrew](http://linuxbrew.sh/)
+to install fzf.
 
 ```sh
-mkdir -p ~/bin
-wget https://raw.github.com/junegunn/fzf/master/fzf -O ~/bin/fzf
-chmod +x ~/bin/fzf
+brew install fzf
+
+# To install useful key bindings and fuzzy completion:
+$(brew --prefix)/opt/fzf/install
 ```
 
-Or you can just clone this repository and run
+fzf is also available [via MacPorts][portfile]: `sudo port install fzf`
+
+[portfile]: https://github.com/macports/macports-ports/blob/master/sysutils/fzf/Portfile
+
+### Using git
+
+Alternatively, you can "git clone" this repository to any directory and run
 [install](https://github.com/junegunn/fzf/blob/master/install) script.
 
 ```sh
-git clone https://github.com/junegunn/fzf.git
-fzf/install
+git clone --depth 1 https://github.com/junegunn/fzf.git ~/.fzf
+~/.fzf/install
 ```
 
-Make sure that ~/bin is included in $PATH.
+### Using Linux package managers
 
-```sh
-export PATH=$PATH:~/bin
+| Package Manager | Linux Distribution      | Command                            |
+| ---             | ---                     | ---                                |
+| APK             | Alpine Linux            | `sudo apk add fzf`                 |
+| APT             | Debian 9+/Ubuntu 19.10+ | `sudo apt-get install fzf`         |
+| Conda           |                         | `conda install -c conda-forge fzf` |
+| DNF             | Fedora                  | `sudo dnf install fzf`             |
+| Nix             | NixOS, etc.             | `nix-env -iA nixpkgs.fzf`          |
+| Pacman          | Arch Linux              | `sudo pacman -S fzf`               |
+| pkg             | FreeBSD                 | `pkg install fzf`                  |
+| pkg_add         | OpenBSD                 | `pkg_add fzf`                      |
+| XBPS            | Void Linux              | `sudo xbps-install -S fzf`         |
+| Zypper          | openSUSE                | `sudo zypper install fzf`          |
+
+> :warning: **Key bindings (CTRL-T / CTRL-R / ALT-C) and fuzzy auto-completion
+> may not be enabled by default.**
+>
+> Refer to the package documentation for more information. (e.g. `apt-cache show fzf`)
+
+### Windows
+
+Pre-built binaries for Windows can be downloaded [here][bin]. fzf is also
+available via [Chocolatey][choco] and [Scoop][scoop]:
+
+| Package manager | Command             |
+| ---             | ---                 |
+| Chocolatey      | `choco install fzf` |
+| Scoop           | `scoop install fzf` |
+
+[choco]: https://chocolatey.org/packages/fzf
+[scoop]: https://github.com/ScoopInstaller/Main/blob/master/bucket/fzf.json
+
+Known issues and limitations on Windows can be found on [the wiki
+page][windows-wiki].
+
+[windows-wiki]: https://github.com/junegunn/fzf/wiki/Windows
+
+### As Vim plugin
+
+If you use
+[vim-plug](https://github.com/junegunn/vim-plug), add this line to your Vim
+configuration file:
+
+```vim
+Plug 'junegunn/fzf', { 'do': { -> fzf#install() } }
 ```
 
-### Install as Ruby gem
+`fzf#install()` makes sure that you have the latest binary, but it's optional,
+so you can omit it if you use a plugin manager that doesn't support hooks.
 
-fzf can be installed as a Ruby gem
+For more installation options, see [README-VIM.md](README-VIM.md).
 
-```
-gem install fzf
-```
+Upgrading fzf
+-------------
 
-It's a bit easier to install and update the script but the Ruby gem version
-takes slightly longer to start.
+fzf is being actively developed and you might want to upgrade it once in a
+while. Please follow the instruction below depending on the installation
+method used.
 
-### Install as Vim plugin
+- git: `cd ~/.fzf && git pull && ./install`
+- brew: `brew update; brew reinstall fzf`
+- macports: `sudo port upgrade fzf`
+- chocolatey: `choco upgrade fzf`
+- vim-plug: `:PlugUpdate fzf`
 
-You can use any Vim plugin manager to install fzf for Vim. If you don't use one,
-I recommend you try [vim-plug](https://github.com/junegunn/vim-plug).
+Building fzf
+------------
 
-1. [Install vim-plug](https://github.com/junegunn/vim-plug#usage)
-2. Edit your .vimrc
-
-        call plug#begin()
-        Plug 'junegunn/fzf'
-        " ...
-        call plug#end()
-
-3. Run `:PlugInstall`
+See [BUILD.md](BUILD.md).
 
 Usage
 -----
 
-```
-usage: fzf [options]
-
-  -m, --multi      Enable multi-select
-  -x, --extended   Extended-search mode
-  -s, --sort=MAX   Maximum number of matched items to sort. Default: 1000
-  +s, --no-sort    Do not sort the result. Keep the sequence unchanged.
-  +i               Case-sensitive match
-  +c, --no-color   Disable colors
-```
-
-fzf will launch curses-based finder, read the list from STDIN, and write the
+fzf will launch interactive finder, read the list from STDIN, and write the
 selected item to STDOUT.
 
 ```sh
@@ -94,187 +199,503 @@ files excluding hidden ones. (You can override the default command with
 vim $(fzf)
 ```
 
-If you want to preserve the exact sequence of the input, provide `--no-sort` (or
-`+s`) option.
+#### Using the finder
+
+- `CTRL-J` / `CTRL-K` (or `CTRL-N` / `CTRL-P`) to move cursor up and down
+- `Enter` key to select the item, `CTRL-C` / `CTRL-G` / `ESC` to exit
+- On multi-select mode (`-m`), `TAB` and `Shift-TAB` to mark multiple items
+- Emacs style key bindings
+- Mouse: scroll, click, double-click; shift-click and shift-scroll on
+  multi-select mode
+
+#### Layout
+
+fzf by default starts in fullscreen mode, but you can make it start below the
+cursor with `--height` option.
 
 ```sh
-history | fzf +s
+vim $(fzf --height 40%)
 ```
 
-### Key binding
-
-Use CTRL-J and CTRL-K (or CTRL-N and CTRL-P) to change the selection, press
-enter key to select the item. CTRL-C will terminate the finder.
-
-The following readline key bindings should also work as expected.
-
-- CTRL-A / CTRL-E
-- CTRL-B / CTRL-F
-- CTRL-W / CTRL-U
-- ALT-B / ALT-F
-
-If you enable multi-select mode with `-m` option, you can select multiple items
-with TAB or Shift-TAB key.
-
-### Extended-search mode
-
-With `-x` or `--extended` option, fzf will start in "extended-search mode".
-
-In this mode, you can specify multiple patterns delimited by spaces,
-such as: `^music .mp3$ sbtrkt !rmx`
-
-| Token    | Description                      | Match type           |
-| -------- | -------------------------------- | -------------------- |
-| `^music` | Items that start with `music`    | prefix-exact-match   |
-| `.mp3$`  | Items that end with `.mp3`       | suffix-exact-match   |
-| `sbtrkt` | Items that match `sbtrkt`        | fuzzy-match          |
-| `!rmx`   | Items that do not match `rmx`    | inverse-fuzzy-match  |
-| `'wild`  | Items that include `wild`        | exact-match (quoted) |
-| `!'fire` | Items that do not include `fire` | inverse-exact-match  |
-
-Usage as Vim plugin
--------------------
-
-If you install fzf as a Vim plugin, `:FZF` command will be added.
-
-```vim
-:FZF
-:FZF --no-sort -m
-```
-
-You can override the source command which produces input to fzf.
-
-```vim
-let g:fzf_source = 'find . -type f'
-```
-
-And you can predefine default options to fzf command.
-
-```vim
-let g:fzf_options = '--no-color --extended'
-```
-
-For more advanced uses, you can call `fzf#run` function as follows.
-
-```vim
-:call fzf#run('tabedit', '-m +c')
-```
-
-Most of the time, you will prefer native Vim plugins with better integration
-with Vim. The only reason one might consider using fzf in Vim is its speed. For
-a very large list of files, fzf is significantly faster and it does not block.
-
-Useful bash examples
---------------------
+Also check out `--reverse` and `--layout` options if you prefer
+"top-down" layout instead of the default "bottom-up" layout.
 
 ```sh
-# vimf - Open selected file in Vim
-vimf() {
-  FILE=$(fzf) && vim "$FILE"
-}
-
-# fd - cd to selected directory
-fd() {
-  DIR=$(find ${1:-*} -path '*/\.*' -prune -o -type d -print 2> /dev/null | fzf) && cd "$DIR"
-}
-
-# fda - including hidden directories
-fda() {
-  DIR=$(find ${1:-*} -type d 2> /dev/null | fzf) && cd "$DIR"
-}
-
-# fh - repeat history
-fh() {
-  eval $(history | fzf +s | sed 's/ *[0-9]* *//')
-}
-
-# fkill - kill process
-fkill() {
-  ps -ef | sed 1d | fzf -m | awk '{print $2}' | xargs kill -${1:-9}
-}
-
-# (Assuming you don't use the default CTRL-T and CTRL-R)
-
-# CTRL-T - Paste the selected file path into the command line
-bind '"\er": redraw-current-line'
-bind '"\C-t": " \C-u \C-a\C-k$(fzf)\e\C-e\C-y\C-a\C-y\ey\C-h\C-e\er"'
-
-# CTRL-R - Paste the selected command from history into the command line
-bind '"\C-r": " \C-e\C-u$(history | fzf +s | sed \"s/ *[0-9]* *//\")\e\C-e\er"'
+vim $(fzf --height 40% --reverse)
 ```
 
-zsh widgets
------------
+You can add these options to `$FZF_DEFAULT_OPTS` so that they're applied by
+default. For example,
 
 ```sh
-# CTRL-T - Paste the selected file(s) path into the command line
-fzf-file-widget() {
-  local FILES
-  local IFS="
-"
-  FILES=($(
-    find * -path '*/\.*' -prune \
-    -o -type f -print \
-    -o -type l -print 2> /dev/null | fzf -m))
-  unset IFS
-  FILES=$FILES:q
-  LBUFFER="${LBUFFER%% #} $FILES"
-  zle redisplay
-}
-zle     -N   fzf-file-widget
-bindkey '^T' fzf-file-widget
+export FZF_DEFAULT_OPTS='--height 40% --layout=reverse --border'
+```
 
-# ALT-C - cd into the selected directory
-fzf-cd-widget() {
-  cd "${$(find * -path '*/\.*' -prune \
-          -o -type d -print 2> /dev/null | fzf):-.}"
-  zle reset-prompt
-}
-zle     -N    fzf-cd-widget
-bindkey '\ec' fzf-cd-widget
+#### Search syntax
 
-# CTRL-R - Paste the selected command from history into the command line
-fzf-history-widget() {
-  LBUFFER=$(history | fzf +s | sed "s/ *[0-9]* *//")
-  zle redisplay
+Unless otherwise specified, fzf starts in "extended-search mode" where you can
+type in multiple search terms delimited by spaces. e.g. `^music .mp3$ sbtrkt
+!fire`
+
+| Token     | Match type                 | Description                          |
+| --------- | -------------------------- | ------------------------------------ |
+| `sbtrkt`  | fuzzy-match                | Items that match `sbtrkt`            |
+| `'wild`   | exact-match (quoted)       | Items that include `wild`            |
+| `^music`  | prefix-exact-match         | Items that start with `music`        |
+| `.mp3$`   | suffix-exact-match         | Items that end with `.mp3`           |
+| `!fire`   | inverse-exact-match        | Items that do not include `fire`     |
+| `!^music` | inverse-prefix-exact-match | Items that do not start with `music` |
+| `!.mp3$`  | inverse-suffix-exact-match | Items that do not end with `.mp3`    |
+
+If you don't prefer fuzzy matching and do not wish to "quote" every word,
+start fzf with `-e` or `--exact` option. Note that when  `--exact` is set,
+`'`-prefix "unquotes" the term.
+
+A single bar character term acts as an OR operator. For example, the following
+query matches entries that start with `core` and end with either `go`, `rb`,
+or `py`.
+
+```
+^core go$ | rb$ | py$
+```
+
+#### Environment variables
+
+- `FZF_DEFAULT_COMMAND`
+    - Default command to use when input is tty
+    - e.g. `export FZF_DEFAULT_COMMAND='fd --type f'`
+- `FZF_DEFAULT_OPTS`
+    - Default options
+    - e.g. `export FZF_DEFAULT_OPTS="--layout=reverse --inline-info"`
+
+#### Options
+
+See the man page (`man fzf`) for the full list of options.
+
+#### Demo
+If you learn by watching videos, check out this screencast by [@samoshkin](https://github.com/samoshkin) to explore `fzf` features.
+
+<a title="fzf - command-line fuzzy finder" href="https://www.youtube.com/watch?v=qgG5Jhi_Els">
+  <img src="https://i.imgur.com/vtG8olE.png" width="640">
+</a>
+
+Examples
+--------
+
+Many useful examples can be found on [the wiki
+page](https://github.com/junegunn/fzf/wiki/examples). Feel free to add your
+own as well.
+
+`fzf-tmux` script
+-----------------
+
+[fzf-tmux](bin/fzf-tmux) is a bash script that opens fzf in a tmux pane.
+
+```sh
+# usage: fzf-tmux [LAYOUT OPTIONS] [--] [FZF OPTIONS]
+
+# See available options
+fzf-tmux --help
+
+# select git branches in horizontal split below (15 lines)
+git branch | fzf-tmux -d 15
+
+# select multiple words in vertical split on the left (20% of screen width)
+cat /usr/share/dict/words | fzf-tmux -l 20% --multi --reverse
+```
+
+It will still work even when you're not on tmux, silently ignoring `-[pudlr]`
+options, so you can invariably use `fzf-tmux` in your scripts.
+
+Alternatively, you can use `--height HEIGHT[%]` option not to start fzf in
+fullscreen mode.
+
+```sh
+fzf --height 40%
+```
+
+Key bindings for command-line
+-----------------------------
+
+The install script will setup the following key bindings for bash, zsh, and
+fish.
+
+- `CTRL-T` - Paste the selected files and directories onto the command-line
+    - Set `FZF_CTRL_T_COMMAND` to override the default command
+    - Set `FZF_CTRL_T_OPTS` to pass additional options
+- `CTRL-R` - Paste the selected command from history onto the command-line
+    - If you want to see the commands in chronological order, press `CTRL-R`
+      again which toggles sorting by relevance
+    - Set `FZF_CTRL_R_OPTS` to pass additional options
+- `ALT-C` - cd into the selected directory
+    - Set `FZF_ALT_C_COMMAND` to override the default command
+    - Set `FZF_ALT_C_OPTS` to pass additional options
+
+If you're on a tmux session, you can start fzf in a tmux split pane or in
+a tmux popup window by setting `FZF_TMUX_OPTS` (e.g. `-d 40%`).
+See `fzf-tmux --help` for available options.
+
+More tips can be found on [the wiki page](https://github.com/junegunn/fzf/wiki/Configuring-shell-key-bindings).
+
+Fuzzy completion for bash and zsh
+---------------------------------
+
+#### Files and directories
+
+Fuzzy completion for files and directories can be triggered if the word before
+the cursor ends with the trigger sequence which is by default `**`.
+
+- `COMMAND [DIRECTORY/][FUZZY_PATTERN]**<TAB>`
+
+```sh
+# Files under current directory
+# - You can select multiple items with TAB key
+vim **<TAB>
+
+# Files under parent directory
+vim ../**<TAB>
+
+# Files under parent directory that match `fzf`
+vim ../fzf**<TAB>
+
+# Files under your home directory
+vim ~/**<TAB>
+
+
+# Directories under current directory (single-selection)
+cd **<TAB>
+
+# Directories under ~/github that match `fzf`
+cd ~/github/fzf**<TAB>
+```
+
+#### Process IDs
+
+Fuzzy completion for PIDs is provided for kill command. In this case,
+there is no trigger sequence, just press tab key after kill command.
+
+```sh
+# Can select multiple processes with <TAB> or <Shift-TAB> keys
+kill -9 <TAB>
+```
+
+#### Host names
+
+For ssh and telnet commands, fuzzy completion for host names is provided. The
+names are extracted from /etc/hosts and ~/.ssh/config.
+
+```sh
+ssh **<TAB>
+telnet **<TAB>
+```
+
+#### Environment variables / Aliases
+
+```sh
+unset **<TAB>
+export **<TAB>
+unalias **<TAB>
+```
+
+#### Settings
+
+```sh
+# Use ~~ as the trigger sequence instead of the default **
+export FZF_COMPLETION_TRIGGER='~~'
+
+# Options to fzf command
+export FZF_COMPLETION_OPTS='+c -x'
+
+# Use fd (https://github.com/sharkdp/fd) instead of the default find
+# command for listing path candidates.
+# - The first argument to the function ($1) is the base path to start traversal
+# - See the source code (completion.{bash,zsh}) for the details.
+_fzf_compgen_path() {
+  fd --hidden --follow --exclude ".git" . "$1"
 }
-zle     -N   fzf-history-widget
-bindkey '^R' fzf-history-widget
+
+# Use fd to generate the list for directory completion
+_fzf_compgen_dir() {
+  fd --type d --hidden --follow --exclude ".git" . "$1"
+}
+
+# (EXPERIMENTAL) Advanced customization of fzf options via _fzf_comprun function
+# - The first argument to the function is the name of the command.
+# - You should make sure to pass the rest of the arguments to fzf.
+_fzf_comprun() {
+  local command=$1
+  shift
+
+  case "$command" in
+    cd)           fzf "$@" --preview 'tree -C {} | head -200' ;;
+    export|unset) fzf "$@" --preview "eval 'echo \$'{}" ;;
+    ssh)          fzf "$@" --preview 'dig {}' ;;
+    *)            fzf "$@" ;;
+  esac
+}
+```
+
+#### Supported commands
+
+On bash, fuzzy completion is enabled only for a predefined set of commands
+(`complete | grep _fzf` to see the list). But you can enable it for other
+commands as well by using `_fzf_setup_completion` helper function.
+
+```sh
+# usage: _fzf_setup_completion path|dir|var|alias|host COMMANDS...
+_fzf_setup_completion path ag git kubectl
+_fzf_setup_completion dir tree
+```
+
+#### Custom fuzzy completion
+
+_**(Custom completion API is experimental and subject to change)**_
+
+For a command named _"COMMAND"_, define `_fzf_complete_COMMAND` function using
+`_fzf_complete` helper.
+
+```sh
+# Custom fuzzy completion for "doge" command
+#   e.g. doge **<TAB>
+_fzf_complete_doge() {
+  _fzf_complete --multi --reverse --prompt="doge> " -- "$@" < <(
+    echo very
+    echo wow
+    echo such
+    echo doge
+  )
+}
+```
+
+- The arguments before `--` are the options to fzf.
+- After `--`, simply pass the original completion arguments unchanged (`"$@"`).
+- Then write a set of commands that generates the completion candidates and
+  feed its output to the function using process substitution (`< <(...)`).
+
+zsh will automatically pick up the function using the naming convention but in
+bash you have to manually associate the function with the command using
+`complete` command.
+
+```sh
+[ -n "$BASH" ] && complete -F _fzf_complete_doge -o default -o bashdefault doge
+```
+
+If you need to post-process the output from fzf, define
+`_fzf_complete_COMMAND_post` as follows.
+
+```sh
+_fzf_complete_foo() {
+  _fzf_complete --multi --reverse --header-lines=3 -- "$@" < <(
+    ls -al
+  )
+}
+
+_fzf_complete_foo_post() {
+  awk '{print $NF}'
+}
+
+[ -n "$BASH" ] && complete -F _fzf_complete_foo -o default -o bashdefault foo
+```
+
+Vim plugin
+----------
+
+See [README-VIM.md](README-VIM.md).
+
+Advanced topics
+---------------
+
+### Performance
+
+fzf is fast and is [getting even faster][perf]. Performance should not be
+a problem in most use cases. However, you might want to be aware of the
+options that affect the performance.
+
+- `--ansi` tells fzf to extract and parse ANSI color codes in the input and it
+  makes the initial scanning slower. So it's not recommended that you add it
+  to your `$FZF_DEFAULT_OPTS`.
+- `--nth` makes fzf slower as fzf has to tokenize each line.
+- `--with-nth` makes fzf slower as fzf has to tokenize and reassemble each
+  line.
+- If you absolutely need better performance, you can consider using
+  `--algo=v1` (the default being `v2`) to make fzf use a faster greedy
+  algorithm. However, this algorithm is not guaranteed to find the optimal
+  ordering of the matches and is not recommended.
+
+[perf]: https://junegunn.kr/images/fzf-0.17.0.png
+
+### Executing external programs
+
+You can set up key bindings for starting external processes without leaving
+fzf (`execute`, `execute-silent`).
+
+```bash
+# Press F1 to open the file with less without leaving fzf
+# Press CTRL-Y to copy the line to clipboard and aborts fzf (requires pbcopy)
+fzf --bind 'f1:execute(less -f {}),ctrl-y:execute-silent(echo {} | pbcopy)+abort'
+```
+
+See *KEY BINDINGS* section of the man page for details.
+
+### Reloading the candidate list
+
+By binding `reload` action to a key or an event, you can make fzf dynamically
+reload the candidate list. See https://github.com/junegunn/fzf/issues/1750 for
+more details.
+
+#### 1. Update the list of processes by pressing CTRL-R
+
+```sh
+FZF_DEFAULT_COMMAND='ps -ef' \
+  fzf --bind 'ctrl-r:reload($FZF_DEFAULT_COMMAND)' \
+      --header 'Press CTRL-R to reload' --header-lines=1 \
+      --height=50% --layout=reverse
+```
+
+#### 2. Switch between sources by pressing CTRL-D or CTRL-F
+
+```sh
+FZF_DEFAULT_COMMAND='find . -type f' \
+  fzf --bind 'ctrl-d:reload(find . -type d),ctrl-f:reload($FZF_DEFAULT_COMMAND)' \
+      --height=50% --layout=reverse
+```
+
+#### 3. Interactive ripgrep integration
+
+The following example uses fzf as the selector interface for ripgrep. We bound
+`reload` action to `change` event, so every time you type on fzf, ripgrep
+process will restart with the updated query string denoted by the placeholder
+expression `{q}`. Also, note that we used `--phony` option so that fzf doesn't
+perform any secondary filtering.
+
+```sh
+INITIAL_QUERY=""
+RG_PREFIX="rg --column --line-number --no-heading --color=always --smart-case "
+FZF_DEFAULT_COMMAND="$RG_PREFIX '$INITIAL_QUERY'" \
+  fzf --bind "change:reload:$RG_PREFIX {q} || true" \
+      --ansi --phony --query "$INITIAL_QUERY" \
+      --height=50% --layout=reverse
+```
+
+If ripgrep doesn't find any matches, it will exit with a non-zero exit status,
+and fzf will warn you about it. To suppress the warning message, we added
+`|| true` to the command, so that it always exits with 0.
+
+### Preview window
+
+When the `--preview` option is set, fzf automatically starts an external process
+with the current line as the argument and shows the result in the split window.
+Your `$SHELL` is used to execute the command with `$SHELL -c COMMAND`.
+The window can be scrolled using the mouse or custom key bindings.
+
+```bash
+# {} is replaced to the single-quoted string of the focused line
+fzf --preview 'cat {}'
+```
+
+Preview window supports ANSI colors, so you can use any program that
+syntax-highlights the content of a file, such as
+[Bat](https://github.com/sharkdp/bat) or
+[Highlight](http://www.andre-simon.de/doku/highlight/en/highlight.php):
+
+```bash
+fzf --preview 'bat --style=numbers --color=always --line-range :500 {}'
+```
+
+You can customize the size, position, and border of the preview window using
+`--preview-window` option, and the foreground and background color of it with
+`--color` option. For example,
+
+```bash
+fzf --height 40% --layout reverse --info inline --border \
+    --preview 'file {}' --preview-window down:1:noborder \
+    --color 'fg:#bbccdd,fg+:#ddeeff,bg:#334455,preview-bg:#223344,border:#778899'
+```
+
+See the man page (`man fzf`) for the full list of options.
+
+For more advanced examples, see [Key bindings for git with fzf][fzf-git]
+([code](https://gist.github.com/junegunn/8b572b8d4b5eddd8b85e5f4d40f17236)).
+
+[fzf-git]: https://junegunn.kr/2016/07/fzf-git/
+
+----
+
+Since fzf is a general-purpose text filter rather than a file finder, **it is
+not a good idea to add `--preview` option to your `$FZF_DEFAULT_OPTS`**.
+
+```sh
+# *********************
+# ** DO NOT DO THIS! **
+# *********************
+export FZF_DEFAULT_OPTS='--preview "bat --style=numbers --color=always --line-range :500 {}"'
+
+# bat doesn't work with any input other than the list of files
+ps -ef | fzf
+seq 100 | fzf
+history | fzf
 ```
 
 Tips
 ----
 
-### Faster startup with `--disable-gems` options
+#### Respecting `.gitignore`
 
-If you're running Ruby 1.9 or above, you can improve the startup time with
-`--disable-gems` option to Ruby.
-
-- `time ruby ~/bin/fzf -h`
-    - 0.077 sec
-- `time ruby --disable-gems ~/bin/fzf -h`
-    - 0.025 sec
-
-Define fzf alias with the option as follows:
+You can use [fd](https://github.com/sharkdp/fd),
+[ripgrep](https://github.com/BurntSushi/ripgrep), or [the silver
+searcher](https://github.com/ggreer/the_silver_searcher) instead of the
+default find command to traverse the file system while respecting
+`.gitignore`.
 
 ```sh
-alias fzf='ruby --disable-gems ~/bin/fzf'
+# Feed the output of fd into fzf
+fd --type f | fzf
+
+# Setting fd as the default source for fzf
+export FZF_DEFAULT_COMMAND='fd --type f'
+
+# Now fzf (w/o pipe) will use fd instead of find
+fzf
+
+# To apply the command to CTRL-T as well
+export FZF_CTRL_T_COMMAND="$FZF_DEFAULT_COMMAND"
 ```
 
-### Incorrect display on Ruby 1.8
+If you want the command to follow symbolic links, and don't want it to exclude
+hidden files, use the following command:
 
-It is reported that the output of fzf can become unreadable on some terminals
-when it's running on Ruby 1.8. If you experience the problem, upgrade your Ruby
-to 1.9 or above. Ruby 1.9 or above is also required for displaying Unicode
-characters.
+```sh
+export FZF_DEFAULT_COMMAND='fd --type f --hidden --follow --exclude .git'
+```
 
-License
--------
+#### Fish shell
 
-MIT
+`CTRL-T` key binding of fish, unlike those of bash and zsh, will use the last
+token on the command-line as the root directory for the recursive search. For
+instance, hitting `CTRL-T` at the end of the following command-line
 
-Author
-------
+```sh
+ls /var/
+```
 
-Junegunn Choi
+will list all files and directories under `/var/`.
 
+When using a custom `FZF_CTRL_T_COMMAND`, use the unexpanded `$dir` variable to
+make use of this feature. `$dir` defaults to `.` when the last token is not a
+valid directory. Example:
+
+```sh
+set -g FZF_CTRL_T_COMMAND "command find -L \$dir -type f 2> /dev/null | sed '1d; s#^\./##'"
+```
+
+Related projects
+----------------
+
+https://github.com/junegunn/fzf/wiki/Related-projects
+
+[License](LICENSE)
+------------------
+
+The MIT License (MIT)
+
+Copyright (c) 2013-2020 Junegunn Choi

Rakefile

@@ -1,8 +0,0 @@
-require "bundler/gem_tasks"
-require 'rake/testtask'
-
-Rake::TestTask.new(:test) do |test|
-  test.pattern = 'test/**/test_*.rb'
-  test.verbose = true
-end
-

bin/fzf-tmux

@@ -0,0 +1,224 @@
+#!/usr/bin/env bash
+# fzf-tmux: starts fzf in a tmux pane
+# 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'
+
+tmux_args=()
+args=()
+opt=""
+skip=""
+swap=""
+close=""
+term=""
+[[ -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="$1"
+  shift
+  [[ -z "$skip" ]] && case "$arg" in
+    -)
+      term=1
+      ;;
+    --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" =~ "-K -E" ]] || opt="-K -E"
+      elif [[ "$arg" =~ ^.[lr] ]]; then
+        opt="-h"
+        if [[ "$arg" =~ ^.l ]]; then
+          opt="$opt -d"
+          swap="; swap-pane -D ; select-pane -L"
+          close="; tmux swap-pane -D"
+        fi
+      else
+        opt=""
+        if [[ "$arg" =~ ^.u ]]; then
+          opt="$opt -d"
+          swap="; swap-pane -D ; select-pane -U"
+          close="; tmux swap-pane -D"
+        fi
+      fi
+      if [[ ${#arg} -gt 2 ]]; then
+        size="${arg:2}"
+      else
+        if [[ "$1" =~ ^[0-9%,]+$ ]] || [[ "$1" =~ ^[A-Z]$ ]]; then
+          size="$1"
+          shift
+        else
+          continue
+        fi
+      fi
+
+      if [[ "$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 "$swap" ]]; then
+          opt="$opt -p $(( 100 - size ))"
+        else
+          opt="$opt -p $size"
+        fi
+      else
+        if [[ -n "$swap" ]]; then
+          if [[ "$arg" =~ ^.l ]]; then
+            max=$columns
+          else
+            max=$lines
+          fi
+          size=$(( max - size ))
+          [[ $size -lt 0 ]] && size=0
+          opt="$opt -l $size"
+        else
+          opt="$opt -l $size"
+        fi
+      fi
+      ;;
+    --)
+      # "--" can be used to separate fzf-tmux options from fzf options to
+      # avoid conflicts
+      skip=1
+      tmux_args=("${args[@]}")
+      args=()
+      continue
+      ;;
+    *)
+      args+=("$arg")
+      ;;
+  esac
+  [[ -n "$skip" ]] && args+=("$arg")
+done
+
+if [[ -z "$TMUX" ]]; then
+  "$fzf" "${args[@]}"
+  exit $?
+fi
+
+# --height option is not allowed
+args=("${args[@]}" "--no-height")
+
+# Handle zoomed tmux pane without popup options by moving it to a temp window
+if [[ ! "$opt" =~ "-K -E" ]] && tmux list-panes -F '#F' | grep -q Z; then
+  zoomed_without_popup=1
+  original_window=$(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'")
+  tmux swap-pane -t $tmp_window \; select-window -t $tmp_window
+fi
+
+set -e
+
+# Clean up named pipes on exit
+id=$RANDOM
+argsf="${TMPDIR:-/tmp}/fzf-args-$id"
+fifo1="${TMPDIR:-/tmp}/fzf-fifo1-$id"
+fifo2="${TMPDIR:-/tmp}/fzf-fifo2-$id"
+fifo3="${TMPDIR:-/tmp}/fzf-fifo3-$id"
+tmux_win_opts=( $(tmux show-window-options remain-on-exit \; show-window-options synchronize-panes | sed '/ off/d; s/^/set-window-option /; s/$/ \\;/') )
+cleanup() {
+  \rm -f $argsf $fifo1 $fifo2 $fifo3
+
+  # Restore tmux window options
+  if [[ "${#tmux_win_opts[@]}" -gt 0 ]]; 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 [ $# -gt 0 ]; then
+    trap - EXIT
+    exit 130
+  fi
+}
+trap 'cleanup 1' SIGUSR1
+trap 'cleanup' EXIT
+
+envs="export TERM=$TERM "
+[[ "$opt" =~ "-K -E" ]] && FZF_DEFAULT_OPTS="--margin 0,1 $FZF_DEFAULT_OPTS"
+[[ -n "$FZF_DEFAULT_OPTS"    ]] && envs="$envs FZF_DEFAULT_OPTS=$(printf %q "$FZF_DEFAULT_OPTS")"
+[[ -n "$FZF_DEFAULT_COMMAND" ]] && envs="$envs FZF_DEFAULT_COMMAND=$(printf %q "$FZF_DEFAULT_COMMAND")"
+echo "$envs;" > "$argsf"
+
+# Build arguments to fzf
+opts=$(printf "%q " "${args[@]}")
+
+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" =~ "-K -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" "${tmux_args[@]}" $opt -R "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
+  cat <&0 > $fifo1 &
+fi
+tmux set-window-option synchronize-panes off \;\
+  set-window-option remain-on-exit off \;\
+  split-window -c "$PWD" $opt "${tmux_args[@]}" "bash -c 'exec -a fzf bash $argsf'" $swap \
+  > /dev/null 2>&1 || { "$fzf" "${args[@]}"; exit $?; }
+cat $fifo2
+exit "$(cat $fifo3)"

doc/fzf.txt

@@ -0,0 +1,464 @@
+fzf.txt	fzf	Last change: October 18 2020
+FZF - TABLE OF CONTENTS                                            *fzf* *fzf-toc*
+==============================================================================
+
+  FZF Vim integration
+    Installation
+    Summary
+    :FZF[!]
+      Configuration
+        Examples
+          Explanation of g:fzf_colors
+    fzf#run
+    fzf#wrap
+      Global options supported by fzf#wrap
+    Tips
+      fzf inside terminal buffer
+        Starting fzf in a popup window
+        Hide statusline
+    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 git
+    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 git
+    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 }'))
+      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
+    let g:fzf_layout = { 'window': { 'width': 0.9, 'height': 0.6 } }
+
+    " - 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)
+  `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
+  `prompt`               | Prompt before query ( `> ` )
+ ----------------------+------------------------------------------------------
+ - `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
+  `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]]
+   - `highlight` [string default `'Comment'`]: Highlight group for border
+   - `border` [string default `rounded`]: Border style
+     - `rounded` / `sharp` / `horizontal` / `vertical` / `top` / `bottom` / `left` / `right`
+
+
+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 `sink*`) 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%'}`
+
+
+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]]
+    " - highlight [string default 'Comment']: Highlight group for border
+    " - 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 use a non-popup layout (e.g. `{'down': '40%'}`) on Neovim,
+you might want to temporarily disable the statusline for a cleaner look.
+>
+    if has('nvim') && !exists('g:fzf_layout')
+      autocmd! FileType fzf
+      autocmd  FileType fzf set laststatus=0 noshowmode noruler
+        \| autocmd BufLeave <buffer> set laststatus=2 showmode ruler
+    endif
+<
+
+LICENSE                                                            *fzf-license*
+==============================================================================
+
+The MIT License (MIT)
+
+Copyright (c) 2013-2020 Junegunn Choi
+
+==============================================================================
+vim:tw=78:sw=2:ts=2:ft=help:norl:nowrap:

fzf

@@ -1,858 +0,0 @@
-#!/usr/bin/env ruby
-# encoding: utf-8
-#
-#     ____      ____
-#    / __/___  / __/
-#   / /_/_  / / /_
-#  / __/ / /_/ __/
-# /_/   /___/_/    Fuzzy finder for your shell
-#
-# URL:         https://github.com/junegunn/fzf
-# Author:      Junegunn Choi
-# License:     MIT
-# Last update: November 17, 2013
-#
-# Copyright (c) 2013 Junegunn Choi
-#
-# MIT License
-#
-# 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.
-
-require 'thread'
-require 'curses'
-require 'set'
-
-class FZF
-  C = Curses
-  attr_reader :rxflag, :sort, :color, :multi
-
-  class AtomicVar
-    def initialize value
-      @value = value
-      @mutex = Mutex.new
-    end
-
-    def get
-      @mutex.synchronize { @value }
-    end
-
-    def set value = nil
-      if block_given?
-        @mutex.synchronize { @value = yield @value }
-      else
-        @mutex.synchronize { @value = value }
-      end
-    end
-
-    def method_missing sym, *args, &blk
-      @mutex.synchronize { @value.send(sym, *args, &blk) }
-    end
-  end
-
-  def initialize argv, source = $stdin
-    usage 0 unless (%w[--help -h] & argv).empty?
-    @rxflag = argv.delete('+i') ? 0 : Regexp::IGNORECASE
-    @sort   = %w[+s --no-sort].map   { |e| argv.delete e }.compact.empty? ?
-      ENV.fetch('FZF_DEFAULT_SORT', 1000).to_i : nil
-    @color  = %w[+c --no-color].map  { |e| argv.delete e }.compact.empty?
-    @multi  = !%w[-m --multi].map    { |e| argv.delete e }.compact.empty?
-    @xmode  = !%w[-x --extended].map { |e| argv.delete e }.compact.empty?
-    rest    = argv.join ' '
-    if sort = rest.match(/(-s|--sort=?) ?([0-9]+)/)
-      usage 1 unless @sort
-      @sort = sort[2].to_i
-      rest  = rest.delete sort[0]
-    end
-    usage 1 unless rest.empty?
-
-    @source   = source
-    @mtx      = Mutex.new
-    @cv       = ConditionVariable.new
-    @events   = {}
-    @new      = []
-    @queue    = Queue.new
-    @cursor_x = AtomicVar.new(0)
-    @query    = AtomicVar.new('')
-    @matches  = AtomicVar.new([])
-    @count    = AtomicVar.new(0)
-    @vcursor  = AtomicVar.new(0)
-    @vcursors = AtomicVar.new(Set.new)
-    @spinner  = AtomicVar.new('-\|/-\|/'.split(//))
-    @selects  = AtomicVar.new({}) # ordered >= 1.9
-    @main     = Thread.current
-    @stdout   = $stdout.clone
-    @plcount  = 0
-  end
-
-  def start
-    $stdout.reopen($stderr)
-
-    init_screen
-    start_reader
-    start_renderer
-    start_search
-    start_loop
-  end
-
-  def usage x
-    $stderr.puts %[usage: fzf [options]
-
-    -m, --multi      Enable multi-select
-    -x, --extended   Extended-search mode
-    -s, --sort=MAX   Maximum number of matched items to sort. Default: 1000
-    +s, --no-sort    Do not sort the result. Keep the sequence unchanged.
-    +i               Case-sensitive match
-    +c, --no-color   Disable colors]
-    exit x
-  end
-
-  case RUBY_PLATFORM
-  when /darwin/
-    module UConv
-      CHOSUNG   = 0x1100
-      JUNGSUNG  = 0x1161
-      JONGSUNG  = 0x11A7
-      CHOSUNGS  = 19
-      JUNGSUNGS = 21
-      JONGSUNGS = 28
-      JJCOUNT   = JUNGSUNGS * JONGSUNGS
-      NFC_BEGIN = 0xAC00
-      NFC_END   = NFC_BEGIN + CHOSUNGS * JUNGSUNGS * JONGSUNGS
-
-      def self.nfd str
-        str.split(//).map do |c|
-          cp = c.ord
-          if cp >= NFC_BEGIN && cp < NFC_END
-            chr = ''
-            idx  = cp - NFC_BEGIN
-            cho  = CHOSUNG  + idx / JJCOUNT
-            jung = JUNGSUNG + (idx % JJCOUNT) / JONGSUNGS
-            jong = JONGSUNG + idx % JONGSUNGS
-            chr << cho << jung
-            chr << jong if jong != JONGSUNG
-            chr
-          else
-            c
-          end
-        end
-      end
-
-      def self.to_nfc arr
-        [NFC_BEGIN + arr[0] * JJCOUNT +
-         (arr[1] || 0) * JONGSUNGS +
-         (arr[2] || 0)].pack('U*')
-      end
-
-      if String.method_defined?(:each_char)
-        def self.split str
-          str.each_char.to_a
-        end
-      else
-        def self.split str
-          str.split('')
-        end
-      end
-
-      def self.nfc str, offsets = []
-        ret  = ''
-        omap = []
-        pend = []
-        split(str).each_with_index do |c, idx|
-          cp =
-            begin
-              c.ord
-            rescue Exception
-              next
-            end
-          omap << ret.length
-          unless pend.empty?
-            if cp >= JUNGSUNG && cp < JUNGSUNG + JUNGSUNGS
-              pend << cp - JUNGSUNG
-              next
-            elsif cp >= JONGSUNG && cp < JONGSUNG + JONGSUNGS
-              pend << cp - JONGSUNG
-              next
-            else
-              omap[-1] = omap[-1] + 1
-              ret << to_nfc(pend)
-              pend.clear
-            end
-          end
-          if cp >= CHOSUNG && cp < CHOSUNG + CHOSUNGS
-            pend << cp - CHOSUNG
-          else
-            ret << c
-          end
-        end
-        ret << to_nfc(pend) unless pend.empty?
-        return [ret,
-                offsets.map { |pair|
-                  b, e = pair
-                  [omap[b] || 0, omap[e] || ((omap.last || 0) + 1)] }]
-      end
-    end
-
-    def convert_item item
-      UConv.nfc(*item)
-    end
-
-    class Matcher
-      def query_chars q
-        UConv.nfd(q)
-      end
-
-      def sanitize q
-        UConv.nfd(q).join
-      end
-    end
-  else
-    def convert_item item
-      item
-    end
-
-    class Matcher
-      def query_chars q
-        q.split(//)
-      end
-
-      def sanitize q
-        q
-      end
-    end
-  end
-
-  def emit event
-    @mtx.synchronize do
-      @events[event] = yield
-      @cv.broadcast
-    end
-  end
-
-  def max_items; C.lines - 2; end
-  def cursor_y;  C.lines - 1; end
-  def cprint str, col
-    C.attron(col) do
-      addstr_safe str
-    end if str
-  end
-  def addstr_safe str
-    C.addstr str.gsub("\0", '')
-  end
-
-  def print_input
-    C.setpos cursor_y, 0
-    C.clrtoeol
-    cprint '> ', color(:prompt, true)
-    C.attron(C::A_BOLD) do
-      C.addstr @query.get
-    end
-  end
-
-  def print_info msg = nil
-    C.setpos cursor_y - 1, 0
-    C.clrtoeol
-    prefix =
-      if spinner = @spinner.first
-        cprint spinner, color(:spinner, true)
-        ' '
-      else
-        '  '
-      end
-    C.attron color(:info, false) do
-      C.addstr "#{prefix}#{@matches.length}/#{@count.get}"
-      if (selected = @selects.length) > 0
-        C.addstr " (#{selected})"
-      end
-      C.addstr msg if msg
-    end
-  end
-
-  def refresh
-    C.setpos cursor_y, 2 + width(@query[0, @cursor_x.get])
-    C.refresh
-  end
-
-  def ctrl char
-    char.to_s.ord - 'a'.ord + 1
-  end
-
-  def format line, limit, offsets
-    offsets ||= []
-    maxe = offsets.map { |e| e.last }.max || 0
-
-    # Overflow
-    if width(line) > limit
-      ewidth = width(line[0...maxe])
-      # Stri..
-      if ewidth <= limit - 2
-        line, _ = trim line, limit - 2, false
-        line << '..'
-      # ..ring
-      else
-        # ..ri..
-        line = line[0...maxe] + '..' if ewidth < width(line) - 2
-        line, diff = trim line, limit - 2, true
-        offsets = offsets.map { |pair|
-          b, e = pair
-          b += 2 - diff
-          e += 2 - diff
-          b = [2, b].max
-          [b, e]
-        }
-        line = '..' + line
-      end
-    end
-
-    tokens = []
-    index = 0
-    offsets.select  { |pair| pair.first < pair.last }.
-            sort_by { |pair| pair }.each do |pair|
-      b, e = pair.map { |x| [index, x].max }
-      tokens << [line[index...b], false]
-      tokens << [line[b...e], true]
-      index = e
-    end
-    tokens << [line[index..-1], false]
-    tokens.reject { |pair| pair.first.empty? }
-  end
-
-  def print_item row, tokens, chosen, selected
-    # Cursor
-    C.setpos row, 0
-    C.clrtoeol
-    cprint chosen ? '>' : ' ', color(:cursor, true)
-    cprint selected ? '>' : ' ',
-      chosen ? color(:chosen) : (selected ? color(:selected, true) : 0)
-
-    # Highlighted item
-    C.attron color(:chosen, true) if chosen
-    tokens.each do |pair|
-      token, highlighted = pair
-
-      if highlighted
-        cprint   token, color(chosen ? :match! : :match, chosen)
-        C.attron color(:chosen, true) if chosen
-      else
-        addstr_safe token
-      end
-    end
-    C.attroff color(:chosen, true) if chosen
-  end
-
-  def sort_by_rank list
-    list.sort_by { |tuple|
-      line, offsets = tuple
-      matchlen = 0
-      pe = nil
-      offsets.sort.each do |pair|
-        b, e = pair
-        b    = pe if pe && pe > b
-        pe   = e
-        matchlen += e - b
-      end
-      [matchlen, line.length, line]
-    }
-  end
-
-  if RUBY_VERSION.split('.').map { |e| e.rjust(3, '0') }.join > '001009'
-    @@wrx = Regexp.new '\p{Han}|\p{Katakana}|\p{Hiragana}|\p{Hangul}'
-    def width str
-      str.gsub(@@wrx, '  ').length
-    end
-
-    def trim str, len, left
-      width = width str
-      diff  = 0
-      while width > len
-        width -= (left ? str[0, 1] : str[-1, 1]) =~ @@wrx ? 2 : 1
-        str    = left ? str[1..-1] : str[0...-1]
-        diff  += 1
-      end
-      [str, diff]
-    end
-  else
-    def width str
-      str.length
-    end
-
-    def trim str, len, left
-      diff = str.length - len
-      if diff > 0
-        [left ? str[diff..-1] : str[0...-diff], diff]
-      else
-        [str, 0]
-      end
-    end
-
-    class ::String
-      def ord
-        self.unpack('c').first
-      end
-    end
-
-    class ::Fixnum
-      def ord
-        self
-      end
-    end
-  end
-
-  def init_screen
-    C.init_screen
-    C.start_color
-    dbg =
-      if C.respond_to?(:use_default_colors)
-        C.use_default_colors
-        -1
-      else
-        C::COLOR_BLACK
-      end
-    C.raw
-    C.noecho
-
-    if @color
-      if C.can_change_color?
-        C.init_pair 1, 110, dbg
-        C.init_pair 2, 108, dbg
-        C.init_pair 3, 254, 236
-        C.init_pair 4, 151, 236
-        C.init_pair 5, 148, dbg
-        C.init_pair 6, 144, dbg
-        C.init_pair 7, 161, 236
-        C.init_pair 8, 168, 236
-      else
-        C.init_pair 1, C::COLOR_BLUE,    dbg
-        C.init_pair 2, C::COLOR_GREEN,   dbg
-        C.init_pair 3, C::COLOR_YELLOW,  C::COLOR_BLACK
-        C.init_pair 4, C::COLOR_GREEN,   C::COLOR_BLACK
-        C.init_pair 5, C::COLOR_GREEN,   dbg
-        C.init_pair 6, C::COLOR_WHITE,   dbg
-        C.init_pair 7, C::COLOR_RED,     C::COLOR_BLACK
-        C.init_pair 8, C::COLOR_MAGENTA, C::COLOR_BLACK
-      end
-
-      def self.color sym, bold = false
-        C.color_pair([:prompt, :match, :chosen, :match!,
-                      :spinner, :info, :cursor, :selected].index(sym) + 1) |
-          (bold ? C::A_BOLD : 0)
-      end
-    else
-      def self.color sym, bold = false
-        case sym
-        when :chosen
-          bold ? C::A_REVERSE : 0
-        when :match
-          C::A_UNDERLINE
-        when :match!
-          C::A_REVERSE | C::A_UNDERLINE
-        else
-          0
-        end | (bold ? C::A_BOLD : 0)
-      end
-    end
-  end
-
-  def start_reader
-    stream =
-      if @source.tty?
-        if default_command = ENV['FZF_DEFAULT_COMMAND']
-          IO.popen(default_command)
-        elsif !`which find`.empty?
-          IO.popen("find * -path '*/\\.*' -prune -o -type f -print -o -type l -print 2> /dev/null")
-        else
-          exit 1
-        end
-      else
-        @source
-      end
-
-    Thread.new do
-      while line = stream.gets
-        emit(:new) { @new << line.chomp }
-      end
-      emit(:loaded) { true }
-      @spinner.clear
-    end
-  end
-
-  def start_search
-    matcher  = (@xmode ? ExtendedFuzzyMatcher : FuzzyMatcher).new @rxflag
-    searcher = Thread.new {
-      lists   = []
-      events  = {}
-      fcache  = {}
-      q       = ''
-      delay   = -5
-
-      begin
-        while true
-          @mtx.synchronize do
-            while true
-              events.merge! @events
-
-              if @events.empty? # No new events
-                @cv.wait @mtx
-                next
-              end
-              @events.clear
-              break
-            end
-
-            if events[:new]
-              lists << @new
-              @count.set { |c| c + @new.length }
-              @spinner.set { |spinner|
-                if e = spinner.shift
-                  spinner.push e
-                end; spinner
-              }
-              @new = []
-              fcache.clear
-            end
-          end#mtx
-
-          new_search = events[:key] || events.delete(:new)
-          user_input = events[:key]
-          progress   = 0
-          started_at = Time.now
-
-          if new_search && !lists.empty?
-            q, cx = events.delete(:key) || [q, 0]
-            empty = matcher.empty?(q)
-            matches = fcache[q] ||=
-              begin
-                found = []
-                skip  = false
-                cnt   = 0
-                lists.each do |list|
-                  cnt += list.length
-                  skip = @mtx.synchronize { @events[:key] }
-                  break if skip
-
-                  if !empty && (progress = 100 * cnt / @count.get) < 100 && Time.now - started_at > 0.5
-                    render { print_info " (#{progress}%)" }
-                  end
-
-                  found.concat(q.empty? ? list :
-                               matcher.match(list, q, q[0, cx], q[cx..-1]))
-                end
-                next if skip
-                @sort ? found : found.reverse
-              end
-
-            if !empty && @sort && matches.length <= @sort
-              matches = sort_by_rank(matches)
-            end
-
-            # Atomic update
-            @matches.set matches
-          end#new_search
-
-          # This small delay reduces the number of partial lists
-          sleep((delay = [20, delay + 5].min) * 0.01) unless user_input
-
-          update_list new_search
-        end#while
-      rescue Exception => e
-        @main.raise e
-      end
-    }
-  end
-
-  def pick
-    items = @matches[0, max_items]
-    curr = [0, [@vcursor.get, items.length - 1].min].max
-    [*items.fetch(curr, [])][0]
-  end
-
-  def update_list wipe
-    render do
-      items = @matches[0, max_items]
-
-      # Wipe
-      if items.length < @plcount
-        @plcount.downto(items.length) do |idx|
-          C.setpos cursor_y - idx - 2, 0
-          C.clrtoeol
-        end
-      end
-      @plcount = items.length
-
-      maxc    = C.cols - 3
-      vcursor = @vcursor.set { |v| [0, [v, items.length - 1].min].max }
-      cleanse = Set[vcursor]
-      @vcursors.set { |vs|
-        cleanse.merge vs
-        Set.new
-      }
-      items.each_with_index do |item, idx|
-        next unless wipe || cleanse.include?(idx)
-        row           = cursor_y - idx - 2
-        chosen        = idx == vcursor
-        selected      = @selects.include?([*item][0])
-        line, offsets = convert_item item
-        tokens        = format line, maxc, offsets
-        print_item row, tokens, chosen, selected
-      end
-      print_info
-    end
-  end
-
-  def start_renderer
-    Thread.new do
-      begin
-        while blk = @queue.shift
-          blk.call
-          refresh
-        end
-      rescue Exception => e
-        @main.raise e
-      end
-    end
-  end
-
-  def render &blk
-    @queue.push blk
-    nil
-  end
-
-  def start_loop
-    got = nil
-    begin
-      tty     = IO.open(IO.sysopen('/dev/tty'), 'r')
-      input   = ''
-      cursor  = 0
-      backword = proc {
-        cursor = (input[0, cursor].rindex(/\s\S/) || -1) + 1
-      }
-      actions = {
-        :nop     => proc { nil },
-        ctrl(:c) => proc { exit 1 },
-        ctrl(:d) => proc { exit 1 if input.empty? },
-        ctrl(:m) => proc {
-          got = pick
-          exit 0
-        },
-        ctrl(:u) => proc { input = input[cursor..-1]; cursor = 0 },
-        ctrl(:a) => proc { cursor = 0; nil },
-        ctrl(:e) => proc { cursor = input.length; nil },
-        ctrl(:j) => proc { @vcursor.set { |v| @vcursors << v; v - 1 }; update_list false },
-        ctrl(:k) => proc { @vcursor.set { |v| @vcursors << v; v + 1 }; update_list false },
-        ctrl(:w) => proc {
-          pcursor = cursor
-          backword.call
-          input = input[0...cursor] + input[pcursor..-1]
-        },
-        127 => proc { input[cursor -= 1] = '' if cursor > 0 },
-        9   => proc { |o|
-          if @multi && sel = pick
-            if @selects.has_key? sel
-              @selects.delete sel
-            else
-              @selects[sel] = 1
-            end
-            @vcursor.set { |v|
-              @vcursors << v
-              v + (o == :stab ? 1 : -1)
-            }
-            update_list false
-          end
-        },
-        :left  => proc { cursor = [0, cursor - 1].max; nil },
-        :right => proc { cursor = [input.length, cursor + 1].min; nil },
-        :alt_b => proc { backword.call; nil },
-        :alt_f => proc {
-          cursor += (input[cursor..-1].index(/(\S\s)|(.$)/) || -1) + 1
-          nil
-        },
-      }
-      actions[ctrl(:b)] = actions[:left]
-      actions[ctrl(:f)] = actions[:right]
-      actions[ctrl(:h)] = actions[127]
-      actions[ctrl(:n)] = actions[ctrl(:j)]
-      actions[ctrl(:p)] = actions[ctrl(:k)]
-      actions[:stab]    = actions[9]
-
-      while true
-        @cursor_x.set cursor
-        render { print_input }
-
-        ord = tty.getc.ord
-        ord =
-          case ord = tty.getc.ord
-          when 91
-            case tty.getc.ord
-            when 68 then :left
-            when 67 then :right
-            when 66 then ctrl(:j)
-            when 65 then ctrl(:k)
-            when 90 then :stab
-            else :nop
-            end
-          when 'b'.ord
-            :alt_b
-          when 'f'.ord
-            :alt_f
-          else
-            ord
-          end if ord == 27
-
-        upd = actions.fetch(ord, proc { |ord|
-          char = [ord].pack('U*')
-          if char =~ /[[:print:]]/
-            input.insert cursor, char
-            cursor += 1
-          end
-        }).call(ord)
-
-        # Dispatch key event
-        emit(:key) { [@query.set(input.dup), cursor] } if upd
-      end
-    ensure
-      C.close_screen
-      if got
-        if @selects.empty?
-          @stdout.puts got
-        else
-          @selects.each do |sel, _|
-            @stdout.puts sel
-          end
-        end
-      end
-    end
-  end
-
-  class FuzzyMatcher < Matcher
-    attr_reader :caches, :rxflag
-
-    def initialize rxflag
-      @caches = Hash.new { |h, k| h[k] = {} }
-      @regexp = {}
-      @rxflag = rxflag
-    end
-
-    def empty? q
-      q.empty?
-    end
-
-    def fuzzy_regex q
-      @regexp[q] ||= begin
-        q = q.downcase if @rxflag != 0
-        Regexp.new(query_chars(q).inject('') { |sum, e|
-          e = Regexp.escape e
-          sum << (e.length > 1 ? "(?:#{e}).*?" :  # FIXME: not equivalent
-                                 "#{e}[^#{e}]*?")
-        }, @rxflag)
-      end
-    end
-
-    def match list, q, prefix, suffix
-      regexp = fuzzy_regex q
-
-      cache = @caches[list.object_id]
-      prefix_cache = nil
-      (prefix.length - 1).downto(1) do |len|
-        break if prefix_cache = cache[prefix[0, len]]
-      end
-
-      suffix_cache = nil
-      0.upto(suffix.length - 1) do |idx|
-        break if suffix_cache = cache[suffix[idx..-1]]
-      end unless suffix.empty?
-
-      partial_cache = [prefix_cache,
-                       suffix_cache].compact.sort_by { |e| e.length }.first
-      cache[q] ||= (partial_cache ?
-                    partial_cache.map { |e| e.first } : list).map { |line|
-        # Ignore errors: e.g. invalid byte sequence in UTF-8
-        md = line.match(regexp) rescue nil
-        md && [line, [md.offset(0)]]
-      }.compact
-    end
-  end
-
-  class ExtendedFuzzyMatcher < FuzzyMatcher
-    def initialize rxflag
-      super
-      @regexps = {}
-    end
-
-    def empty? q
-      parse(q).empty?
-    end
-
-    def parse q
-      q = q.strip
-      @regexps[q] ||= q.split(/\s+/).map { |w|
-        invert =
-          if w =~ /^!/
-            w = w[1..-1]
-            true
-          end
-
-        [ @regexp[w] ||=
-            case w
-            when ''
-              nil
-            when /^'/
-              w.length > 1 ?
-                Regexp.new(sanitize(Regexp.escape(w[1..-1])), rxflag) : nil
-            when /^\^/
-              w.length > 1 ?
-                Regexp.new('^' << sanitize(Regexp.escape(w[1..-1])), rxflag) : nil
-            when /\$$/
-              w.length > 1 ?
-                Regexp.new(sanitize(Regexp.escape(w[0..-2])) << '$', rxflag) : nil
-            else
-              fuzzy_regex w
-            end, invert ]
-      }.select { |pair| pair.first }
-    end
-
-    def match list, q, prefix, suffix
-      regexps = parse q
-      # Look for prefix cache
-      cache  = @caches[list.object_id]
-      prefix = prefix.strip.sub(/\$\S*$/, '').sub(/(^|\s)!\S*$/, '')
-      prefix_cache = nil
-      (prefix.length - 1).downto(1) do |len|
-        break if prefix_cache = cache[Set[@regexps[prefix[0, len]]]]
-      end
-
-      cache[Set[regexps]] ||= (prefix_cache ?
-                               prefix_cache.map { |e| e.first } :
-                               list).map { |line|
-        offsets = []
-        regexps.all? { |pair|
-          regexp, invert = pair
-          md = line.match(regexp) rescue nil
-          if md && !invert
-            offsets << md.offset(0)
-          elsif !md && invert
-            true
-          end
-        } && [line, offsets]
-      }.select { |e| e }
-    end
-  end
-end#FZF
-
-FZF.new(ARGV, $stdin).start if ENV.fetch('FZF_EXECUTABLE', '1') == '1'
-

fzf.gemspec

@@ -1,15 +0,0 @@
-# coding: utf-8
-Gem::Specification.new do |spec|
-  spec.name          = 'fzf'
-  spec.version       = '0.4.2'
-  spec.authors       = ['Junegunn Choi']
-  spec.email         = ['junegunn.c@gmail.com']
-  spec.description   = %q{Fuzzy finder for your shell}
-  spec.summary       = %q{Fuzzy finder for your shell}
-  spec.homepage      = 'https://github.com/junegunn/fzf'
-  spec.license       = 'MIT'
-
-  spec.bindir        = '.'
-  spec.files         = %w[fzf.gemspec]
-  spec.executables   = 'fzf'
-end

go.mod

@@ -0,0 +1,15 @@
+module github.com/junegunn/fzf
+
+require (
+	github.com/gdamore/tcell v1.4.0
+	github.com/mattn/go-isatty v0.0.12
+	github.com/mattn/go-runewidth v0.0.9
+	github.com/mattn/go-shellwords v1.0.10
+	github.com/saracen/walker v0.1.1
+	golang.org/x/crypto v0.0.0-20201016220609-9e8e0b390897
+	golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9 // indirect
+	golang.org/x/sys v0.0.0-20201026173827-119d4633e4d1
+	golang.org/x/text v0.3.3 // indirect
+)
+
+go 1.13

go.sum

@@ -0,0 +1,35 @@
+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 v1.4.0 h1:vUnHwJRvcPQa3tzi+0QI4U9JINXYJlOz9yiaiPQ2wMU=
+github.com/gdamore/tcell v1.4.0/go.mod h1:vxEiSDZdW3L+Uhjii9c3375IlDmR05bzxY404ZVSMo0=
+github.com/lucasb-eyer/go-colorful v1.0.3 h1:QIbQXiugsb+q10B+MI+7DI1oQLdmnep86tWFlaaUAac=
+github.com/lucasb-eyer/go-colorful v1.0.3/go.mod h1:R4dSotOR9KMtayYi1e77YzuveK+i7ruzyGqttikkLy0=
+github.com/mattn/go-isatty v0.0.12 h1:wuysRhFDzyxgEmMf5xjvJ2M9dZoWAXNNr5LSBS7uHXY=
+github.com/mattn/go-isatty v0.0.12/go.mod h1:cbi8OIDigv2wuxKPP5vlRcQ1OAZbq2CE4Kysco4FUpU=
+github.com/mattn/go-runewidth v0.0.7/go.mod h1:H031xJmbD/WCDINGzjvQ9THkh0rPKHF+m2gUSrubnMI=
+github.com/mattn/go-runewidth v0.0.9 h1:Lm995f3rfxdpd6TSmuVCHVb/QhupuXlYr8sCI/QdE+0=
+github.com/mattn/go-runewidth v0.0.9/go.mod h1:H031xJmbD/WCDINGzjvQ9THkh0rPKHF+m2gUSrubnMI=
+github.com/mattn/go-shellwords v1.0.10 h1:Y7Xqm8piKOO3v10Thp7Z36h4FYFjt5xB//6XvOrs2Gw=
+github.com/mattn/go-shellwords v1.0.10/go.mod h1:EZzvwXDESEeg03EKmM+RmDnNOPKG4lLtQsUlTZDWQ8Y=
+github.com/saracen/walker v0.1.1 h1:Ou2QIKTWqo0QxhtuHVmtObbmhjMCEUyJ82xp0uV+MGI=
+github.com/saracen/walker v0.1.1/go.mod h1:0oKYMsKVhSJ+ful4p/XbjvXbMgLEkLITZaxozsl4CGE=
+golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2 h1:VklqNMn3ovrHsnt90PveolxSbWFaJdECFbxSq0Mqo2M=
+golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
+golang.org/x/crypto v0.0.0-20201016220609-9e8e0b390897 h1:pLI5jrR7OSLijeIDcmRxNmw2api+jEfxLoykJVice/E=
+golang.org/x/crypto v0.0.0-20201016220609-9e8e0b390897/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
+golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
+golang.org/x/sync v0.0.0-20200317015054-43a5402ce75a/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9 h1:SQFwaSi55rU7vdNs9Yr0Z324VNlrF+0wMqRXT4St8ck=
+golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20190626150813-e07cf5db2756 h1:9nuHUbU8dRnRRfj9KjWUVrJeoexdbeMjttk6Oh1rD10=
+golang.org/x/sys v0.0.0-20190626150813-e07cf5db2756/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20200116001909-b77594299b42/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20201026173827-119d4633e4d1 h1:/DtoiOYKoQCcIFXQjz07RnWNPRCbqmSXSpgEzhC9ZHM=
+golang.org/x/sys v0.0.0-20201026173827-119d4633e4d1/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/text v0.3.0 h1:g61tztE5qeGQ89tm6NTjjM9VPIm088od1l6aSorWRWg=
+golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
+golang.org/x/text v0.3.3 h1:cokOdA+Jmi5PJGXLlLllQSgYigAEfHXJAERHVMaCc2k=
+golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
+golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=

install

@@ -1,7 +1,381 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
-cd `dirname $BASH_SOURCE`
-mkdir -p ~/bin
-ln -sf `pwd`/fzf ~/bin/fzf
-chmod +x ~/bin/fzf
+set -u
 
+version=0.24.0
+auto_completion=
+key_bindings=
+update_config=2
+shells="bash zsh fish"
+prefix='~/.fzf'
+prefix_expand=~/.fzf
+fish_dir=${XDG_CONFIG_HOME:-$HOME/.config}/fish
+
+help() {
+  cat << EOF
+usage: $0 [OPTIONS]
+
+    --help               Show this message
+    --bin                Download fzf binary only; Do not generate ~/.fzf.{bash,zsh}
+    --all                Download fzf binary and update configuration files
+                         to enable key bindings and fuzzy completion
+    --xdg                Generate files under \$XDG_CONFIG_HOME/fzf
+    --[no-]key-bindings  Enable/disable key bindings (CTRL-T, CTRL-R, ALT-C)
+    --[no-]completion    Enable/disable fuzzy completion (bash & zsh)
+    --[no-]update-rc     Whether or not to update shell configuration files
+
+    --no-bash            Do not set up bash configuration
+    --no-zsh             Do not set up zsh configuration
+    --no-fish            Do not set up fish configuration
+EOF
+}
+
+for opt in "$@"; do
+  case $opt in
+    --help)
+      help
+      exit 0
+      ;;
+    --all)
+      auto_completion=1
+      key_bindings=1
+      update_config=1
+      ;;
+    --xdg)
+      prefix='"${XDG_CONFIG_HOME:-$HOME/.config}"/fzf/fzf'
+      prefix_expand=${XDG_CONFIG_HOME:-$HOME/.config}/fzf/fzf
+      mkdir -p "${XDG_CONFIG_HOME:-$HOME/.config}/fzf"
+      ;;
+    --key-bindings)    key_bindings=1    ;;
+    --no-key-bindings) key_bindings=0    ;;
+    --completion)      auto_completion=1 ;;
+    --no-completion)   auto_completion=0 ;;
+    --update-rc)       update_config=1   ;;
+    --no-update-rc)    update_config=0   ;;
+    --bin)             ;;
+    --no-bash)         shells=${shells/bash/} ;;
+    --no-zsh)          shells=${shells/zsh/} ;;
+    --no-fish)         shells=${shells/fish/} ;;
+    *)
+      echo "unknown option: $opt"
+      help
+      exit 1
+      ;;
+  esac
+done
+
+cd "$(dirname "${BASH_SOURCE[0]}")"
+fzf_base=$(pwd)
+fzf_base_esc=$(printf %q "$fzf_base")
+
+ask() {
+  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() {
+  echo -n "  - Checking fzf executable ... "
+  local output
+  output=$("$fzf_base"/bin/fzf --version 2>&1)
+  if [ $? -ne 0 ]; then
+    echo "Error: $output"
+    binary_error="Invalid binary"
+  else
+    output=${output/ */}
+    if [ "$version" != "$output" ]; then
+      echo "$output != $version"
+      binary_error="Invalid version"
+    else
+      echo "$output"
+      binary_error=""
+      return 0
+    fi
+  fi
+  rm -f "$fzf_base"/bin/fzf
+  return 1
+}
+
+link_fzf_in_path() {
+  if which_fzf="$(command -v fzf)"; then
+    echo "  - Found in \$PATH"
+    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 "$temp"
+  fi
+}
+
+download() {
+  echo "Downloading bin/fzf ..."
+  if [ -x "$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 [ $? -ne 0 ]; then
+    binary_error="Failed to create bin directory"
+    return
+  fi
+
+  local url
+  url=https://github.com/junegunn/fzf/releases/download/$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 fzf ]; then
+    binary_error="Failed to download ${1}"
+    return
+  fi
+
+  chmod +x fzf && check_binary
+}
+
+# Try to download binary executable
+archi=$(uname -sm)
+binary_available=1
+binary_error=""
+case "$archi" in
+  Darwin\ *64)     download fzf-$version-darwin_amd64.tar.gz  ;;
+  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-$version-linux_arm64.tar.gz   ;;
+  Linux\ *64)      download fzf-$version-linux_amd64.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
+
+cd "$fzf_base"
+if [ -n "$binary_error" ]; then
+  if [ $binary_available -eq 0 ]; then
+    echo "No prebuilt binary for $archi ..."
+  else
+    echo "  - $binary_error !!!"
+  fi
+  if command -v go > /dev/null; then
+    echo -n "Building binary (go get -u github.com/junegunn/fzf) ... "
+    if [ -z "${GOPATH-}" ]; then
+      export GOPATH="${TMPDIR:-/tmp}/fzf-gopath"
+      mkdir -p "$GOPATH"
+    fi
+    if go get -u 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?"
+  auto_completion=$?
+fi
+
+# Key-bindings
+if [ -z "$key_bindings" ]; then
+  ask "Do you want to enable key bindings?"
+  key_bindings=$?
+fi
+
+echo
+for shell in $shells; do
+  [[ "$shell" = fish ]] && continue
+  src=${prefix_expand}.${shell}
+  echo -n "Generate $src ... "
+
+  fzf_completion="[[ \$- == *i* ]] && source \"$fzf_base/shell/completion.${shell}\" 2> /dev/null"
+  if [ $auto_completion -eq 0 ]; then
+    fzf_completion="# $fzf_completion"
+  fi
+
+  fzf_key_bindings="source \"$fzf_base/shell/key-bindings.${shell}\""
+  if [ $key_bindings -eq 0 ]; then
+    fzf_key_bindings="# $fzf_key_bindings"
+  fi
+
+  cat > "$src" << EOF
+# Setup fzf
+# ---------
+if [[ ! "\$PATH" == *$fzf_base_esc/bin* ]]; then
+  export PATH="\${PATH:+\${PATH}:}$fzf_base/bin"
+fi
+
+# Auto-completion
+# ---------------
+$fzf_completion
+
+# Key bindings
+# ------------
+$fzf_key_bindings
+EOF
+  echo "OK"
+done
+
+# fish
+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
+EOF
+  [ $? -eq 0 ] && echo "OK" || echo "Failed"
+
+  mkdir -p "${fish_dir}/functions"
+  if [ -e "${fish_dir}/functions/fzf.fish" ]; then
+    echo -n "Remove unnecessary ${fish_dir}/functions/fzf.fish ... "
+    rm -f "${fish_dir}/functions/fzf.fish" && echo "OK" || echo "Failed"
+  fi
+
+  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" \
+           "$fish_binding" && echo "OK" || echo "Failed"
+  else
+    echo -n "Removing $fish_binding ... "
+    rm -f "$fish_binding"
+    echo "OK"
+  fi
+fi
+
+append_line() {
+  set -e
+
+  local update line file pat lno
+  update="$1"
+  line="$2"
+  file="$3"
+  pat="${4:-}"
+  lno=""
+
+  echo "Update $file:"
+  echo "  - $line"
+  if [ -f "$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 [ $update -eq 1 ]; then
+      [ -f "$file" ] && echo >> "$file"
+      echo "$line" >> "$file"
+      echo "    + Added"
+    else
+      echo "    ~ Skipped"
+    fi
+  fi
+  echo
+  set +e
+}
+
+create_file() {
+  local file="$1"
+  shift
+  echo "Create $file:"
+  for line in "$@"; do
+    echo "    $line"
+    echo "$line" >> "$file"
+  done
+  echo
+}
+
+if [ $update_config -eq 2 ]; then
+  echo
+  ask "Do you want to update your shell configuration files?"
+  update_config=$?
+fi
+echo
+for shell in $shells; do
+  [[ "$shell" = fish ]] && continue
+  [ $shell = zsh ] && dest=${ZDOTDIR:-~}/.zshrc || dest=~/.bashrc
+  append_line $update_config "[ -f ${prefix}.${shell} ] && source ${prefix}.${shell}" "$dest" "${prefix}.${shell}"
+done
+
+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 [ $update_config -eq 1 ]; then
+  echo 'Finished. Restart your shell or reload config file.'
+  if [[ "$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 +1,61 @@
+$version="0.24.0"
+
+$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
+  (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 $file"
+    return
+  }
+  check_binary >$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 (
+	"github.com/junegunn/fzf/src"
+	"github.com/junegunn/fzf/src/protector"
+)
+
+var version string
+var revision string
+
+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) 2013-2020 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 "Oct 2020" "fzf 0.24.0" "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

man/man1/fzf.1

@@ -0,0 +1,886 @@
+.ig
+The MIT License (MIT)
+
+Copyright (c) 2013-2020 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 1 "Oct 2020" "fzf 0.24.0" "fzf - a command-line fuzzy finder"
+
+.SH NAME
+fzf - a command-line fuzzy finder
+
+.SH SYNOPSIS
+fzf [options]
+
+.SH DESCRIPTION
+fzf is a general-purpose command-line fuzzy finder.
+
+.SH OPTIONS
+.SS Search mode
+.TP
+.B "-x, --extended"
+Extended-search mode. Since 0.10.9, this is enabled by default. You can disable
+it with \fB+x\fR or \fB--no-extended\fR.
+.TP
+.B "-e, --exact"
+Enable exact-match
+.TP
+.B "-i"
+Case-insensitive match (default: smart-case match)
+.TP
+.B "+i"
+Case-sensitive match
+.TP
+.B "--literal"
+Do not normalize latin script letters for matching.
+.TP
+.BI "--algo=" TYPE
+Fuzzy matching algorithm (default: v2)
+
+.br
+.BR v2 "     Optimal scoring algorithm (quality)"
+.br
+.BR v1 "     Faster but not guaranteed to find the optimal result (performance)"
+.br
+
+.TP
+.BI "-n, --nth=" "N[,..]"
+Comma-separated list of field index expressions for limiting search scope.
+See \fBFIELD INDEX EXPRESSION\fR for the details.
+.TP
+.BI "--with-nth=" "N[,..]"
+Transform the presentation of each line using field index expressions
+.TP
+.BI "-d, --delimiter=" "STR"
+Field delimiter regex for \fB--nth\fR and \fB--with-nth\fR (default: AWK-style)
+.TP
+.BI "--phony"
+Do not perform search. With this option, fzf becomes a simple selector
+interface rather than a "fuzzy finder".
+.SS Search result
+.TP
+.B "+s, --no-sort"
+Do not sort the result
+.TP
+.B "--tac"
+Reverse the order of the input
+
+.RS
+e.g.
+     \fBhistory | fzf --tac --no-sort\fR
+.RE
+.TP
+.BI "--tiebreak=" "CRI[,..]"
+Comma-separated list of sort criteria to apply when the scores are tied.
+.br
+
+.br
+.BR length "  Prefers line with shorter length"
+.br
+.BR begin "   Prefers line with matched substring closer to the beginning"
+.br
+.BR end "     Prefers line with matched substring closer to the end"
+.br
+.BR index "   Prefers line that appeared earlier in the input stream"
+.br
+
+.br
+- Each criterion should appear only once in the list
+.br
+- \fBindex\fR is only allowed at the end of the list
+.br
+- \fBindex\fR is implicitly appended to the list when not specified
+.br
+- Default is \fBlength\fR (or equivalently \fBlength\fR,index)
+.br
+- If \fBend\fR is found in the list, fzf will scan each line backwards
+.SS Interface
+.TP
+.B "-m, --multi"
+Enable multi-select with tab/shift-tab. It optionally takes an integer argument
+which denotes the maximum number of items that can be selected.
+.TP
+.B "+m, --no-multi"
+Disable multi-select
+.TP
+.B "--no-mouse"
+Disable mouse
+.TP
+.BI "--bind=" "KEYBINDS"
+Comma-separated list of custom key bindings. See \fBKEY/EVENT BINDINGS\fR for
+the details.
+.TP
+.B "--cycle"
+Enable cyclic scroll
+.TP
+.B "--keep-right"
+Keep the right end of the line visible when it's too long. Effective only when
+the query string is empty.
+.TP
+.B "--no-hscroll"
+Disable horizontal scroll
+.TP
+.BI "--hscroll-off=" "COL"
+Number of screen columns to keep to the right of the highlighted substring
+(default: 10). Setting it to a large value will cause the text to be positioned
+on the center of the screen.
+.TP
+.B "--filepath-word"
+Make word-wise movements and actions respect path separators. The following
+actions are affected:
+
+\fBbackward-kill-word\fR
+.br
+\fBbackward-word\fR
+.br
+\fBforward-word\fR
+.br
+\fBkill-word\fR
+.TP
+.BI "--jump-labels=" "CHARS"
+Label characters for \fBjump\fR and \fBjump-accept\fR
+.SS Layout
+.TP
+.BI "--height=" "HEIGHT[%]"
+Display fzf window below the cursor with the given height instead of using
+the full screen.
+.TP
+.BI "--min-height=" "HEIGHT"
+Minimum height when \fB--height\fR is given in percent (default: 10).
+Ignored when \fB--height\fR is not specified.
+.TP
+.BI "--layout=" "LAYOUT"
+Choose the layout (default: default)
+
+.br
+.BR default "       Display from the bottom of the screen"
+.br
+.BR reverse "       Display from the top of the screen"
+.br
+.BR reverse-list "  Display from the top of the screen, prompt at the bottom"
+.br
+
+.TP
+.B "--reverse"
+A synonym for \fB--layout=reverse\fB
+
+.TP
+.BI "--border" [=STYLE]
+Draw border around the finder
+
+.br
+.BR rounded "     Border with rounded corners (default)"
+.br
+.BR sharp "       Border with sharp corners"
+.br
+.BR horizontal "  Horizontal lines above and below the finder"
+.br
+.BR vertical "    Vertical lines on each side of the finder"
+.br
+.BR top
+.br
+.BR bottom
+.br
+.BR left
+.br
+.BR right
+.br
+
+.TP
+.B "--no-unicode"
+Use ASCII characters instead of Unicode box drawing characters to draw border
+
+.TP
+.BI "--margin=" MARGIN
+Comma-separated expression for margins around the finder.
+.br
+
+.br
+.RS
+.BR TRBL "     Same margin for top, right, bottom, and left"
+.br
+.BR TB,RL "    Vertical, horizontal margin"
+.br
+.BR T,RL,B "   Top, horizontal, bottom margin"
+.br
+.BR T,R,B,L "  Top, right, bottom, left margin"
+.br
+
+.br
+Each part can be given in absolute number or in percentage relative to the
+terminal size with \fB%\fR suffix.
+.br
+
+.br
+e.g.
+     \fBfzf --margin 10%
+     fzf --margin 1,5%\fR
+.RE
+.TP
+.BI "--info=" "STYLE"
+Determines the display style of finder info.
+
+.br
+.BR default "       Display on the next line to the prompt"
+.br
+.BR inline "        Display on the same line"
+.br
+.BR hidden "        Do not display finder info"
+.br
+
+.TP
+.B "--no-info"
+A synonym for \fB--info=hidden\fB
+
+.TP
+.BI "--prompt=" "STR"
+Input prompt (default: '> ')
+.TP
+.BI "--pointer=" "STR"
+Pointer to the current line (default: '>')
+.TP
+.BI "--marker=" "STR"
+Multi-select marker (default: '>')
+.TP
+.BI "--header=" "STR"
+The given string will be printed as the sticky header. The lines are displayed
+in the given order from top to bottom regardless of \fB--layout\fR option, and
+are not affected by \fB--with-nth\fR. ANSI color codes are processed even when
+\fB--ansi\fR is not set.
+.TP
+.BI "--header-lines=" "N"
+The first N lines of the input are treated as the sticky header. When
+\fB--with-nth\fR is set, the lines are transformed just like the other
+lines that follow.
+.SS Display
+.TP
+.B "--ansi"
+Enable processing of ANSI color codes
+.TP
+.BI "--tabstop=" SPACES
+Number of spaces for a tab character (default: 8)
+.TP
+.BI "--color=" "[BASE_SCHEME][,COLOR_NAME[:ANSI_COLOR][:ANSI_ATTRIBUTES]]..."
+Color configuration. The name of the base color scheme is followed by custom
+color mappings.
+
+.RS
+.B BASE SCHEME:
+    (default: dark on 256-color terminal, otherwise 16)
+
+    \fBdark    \fRColor scheme for dark 256-color terminal
+    \fBlight   \fRColor scheme for light 256-color terminal
+    \fB16      \fRColor scheme for 16-color terminal
+    \fBbw      \fRNo colors (equivalent to \fB--no-color\fR)
+
+.B COLOR NAMES:
+    \fBfg         \fRText
+    \fBbg         \fRBackground
+    \fBpreview-fg \fRPreview window text
+    \fBpreview-bg \fRPreview window background
+    \fBhl         \fRHighlighted substrings
+    \fBfg+        \fRText (current line)
+    \fBbg+        \fRBackground (current line)
+    \fBgutter     \fRGutter on the left (defaults to \fBbg+\fR)
+    \fBhl+        \fRHighlighted substrings (current line)
+    \fBinfo       \fRInfo line (match counters)
+    \fBborder     \fRBorder around the window (\fB--border\fR and \fB--preview\fR)
+    \fBprompt     \fRPrompt
+    \fBpointer    \fRPointer to the current line
+    \fBmarker     \fRMulti-select marker
+    \fBspinner    \fRStreaming input indicator
+    \fBheader     \fRHeader
+
+.B ANSI COLORS:
+    \fB-1         \fRDefault terminal foreground/background color
+    \fB           \fR(or the original color of the text)
+    \fB0 ~ 15     \fR16 base colors
+    \fB16 ~ 255   \fRANSI 256 colors
+    \fB#rrggbb    \fR24-bit colors
+
+.B ANSI ATTRIBUTES: (Only applies to foreground colors)
+    \fBregular    \fRClears previously set attributes; should precede the other ones
+    \fBbold\fR
+    \fBunderline\fR
+    \fBreverse\fR
+    \fBdim\fR
+    \fBitalic\fR
+
+.B EXAMPLES:
+
+     \fB# Seoul256 theme with 8-bit colors
+     # (https://github.com/junegunn/seoul256.vim)
+     fzf --color='bg:237,bg+:236,info:143,border:240,spinner:108' \\
+         --color='hl:65,fg:252,header:65,fg+:252' \\
+         --color='pointer:161,marker:168,prompt:110,hl+:108'
+
+     # Seoul256 theme with 24-bit colors
+     fzf --color='bg:#4B4B4B,bg+:#3F3F3F,info:#BDBB72,border:#6B6B6B,spinner:#98BC99' \\
+         --color='hl:#719872,fg:#D9D9D9,header:#719872,fg+:#D9D9D9' \\
+         --color='pointer:#E12672,marker:#E17899,prompt:#98BEDE,hl+:#98BC99'\fR
+.RE
+.TP
+.B "--no-bold"
+Do not use bold text
+.TP
+.B "--black"
+Use black background
+.SS History
+.TP
+.BI "--history=" "HISTORY_FILE"
+Load search history from the specified file and update the file on completion.
+When enabled, \fBCTRL-N\fR and \fBCTRL-P\fR are automatically remapped to
+\fBnext-history\fR and \fBprevious-history\fR.
+.TP
+.BI "--history-size=" "N"
+Maximum number of entries in the history file (default: 1000). The file is
+automatically truncated when the number of the lines exceeds the value.
+.SS Preview
+.TP
+.BI "--preview=" "COMMAND"
+Execute the given command for the current line and display the result on the
+preview window. \fB{}\fR in the command is the placeholder that is replaced to
+the single-quoted string of the current line. To transform the replacement
+string, specify field index expressions between the braces (See \fBFIELD INDEX
+EXPRESSION\fR for the details).
+
+.RS
+e.g.
+     \fBfzf --preview='head -$LINES {}'
+     ls -l | fzf --preview="echo user={3} when={-4..-2}; cat {-1}" --header-lines=1\fR
+
+fzf exports \fB$FZF_PREVIEW_LINES\fR and \fB$FZF_PREVIEW_COLUMNS\fR so that
+they represent the exact size of the preview window. (It also overrides
+\fB$LINES\fR and \fB$COLUMNS\fR with the same values but they can be reset
+by the default shell, so prefer to refer to the ones with \fBFZF_PREVIEW_\fR
+prefix.)
+
+A placeholder expression starting with \fB+\fR flag will be replaced to the
+space-separated list of the selected lines (or the current line if no selection
+was made) individually quoted.
+
+e.g.
+     \fBfzf --multi --preview='head -10 {+}'
+     git log --oneline | fzf --multi --preview 'git show {+1}'\fR
+
+When using a field index expression, leading and trailing whitespace is stripped
+from the replacement string. To preserve the whitespace, use the \fBs\fR flag.
+
+Also, \fB{q}\fR is replaced to the current query string, and \fB{n}\fR is
+replaced to zero-based ordinal index of the line. Use \fB{+n}\fR if you want
+all index numbers when multiple lines are selected.
+
+A placeholder expression with \fBf\fR flag is replaced to the path of
+a temporary file that holds the evaluated list. This is useful when you
+multi-select a large number of items and the length of the evaluated string may
+exceed \fBARG_MAX\fR.
+
+e.g.
+     \fB# Press CTRL-A to select 100K items and see the sum of all the numbers.
+     # This won't work properly without 'f' flag due to ARG_MAX limit.
+     seq 100000 | fzf --multi --bind ctrl-a:select-all \\
+                      --preview "awk '{sum+=\$1} END {print sum}' {+f}"\fR
+
+Note that you can escape a placeholder pattern by prepending a backslash.
+
+Preview window will be updated even when there is no match for the current
+query if any of the placeholder expressions evaluates to a non-empty string.
+
+Since 0.24.0, fzf can render partial preview content before the preview command
+completes. ANSI escape sequence for clearing the display (\fBCSI 2 J\fR) is
+supported, so you can use it to implement preview window that is constantly
+updating.
+
+e.g.
+      \fBfzf --preview 'for i in $(seq 100000); do
+        (( i % 200 == 0 )) && printf "\\033[2J"
+        echo "$i"
+        sleep 0.01
+      done'\fR
+.RE
+.TP
+.BI "--preview-window=" "[POSITION][:SIZE[%]][:rounded|sharp|noborder][:[no]wrap][:[no]cycle][:[no]hidden][:+SCROLL[-OFFSET]][:default]"
+
+.RS
+.B POSITION: (default: right)
+    \fBup
+    \fBdown
+    \fBleft
+    \fBright
+
+\fRDetermines the layout of the preview window. If the argument contains
+\fB:hidden\fR, the preview window will be hidden by default until
+\fBtoggle-preview\fR action is triggered. Long lines are truncated by default.
+Line wrap can be enabled with \fB:wrap\fR flag. Cyclic scrolling is enabled
+with \fB:cycle\fR flag.
+
+If size is given as 0, preview window will not be visible, but fzf will still
+execute the command in the background.
+
+To change the style of the border of the preview window, specify one of
+\fBrounded\fR (border with rounded edges, default), \fBsharp\fR (border with
+sharp edges), or \fBnoborder\fR (no border).
+
+\fB+SCROLL[-OFFSET]\fR determines the initial scroll offset of the preview
+window. \fBSCROLL\fR can be either a numeric integer or a single-field index
+expression that refers to a numeric integer. The optional \fB-OFFSET\fR part is
+for adjusting the base offset so that you can see the text above it. It should
+be given as a numeric integer (\fB-INTEGER\fR), or as a denominator form
+(\fB-/INTEGER\fR) for specifying a fraction of the preview window height.
+
+\fBdefault\fR resets all options previously set to the default.
+
+.RS
+e.g.
+     \fB# Non-default scroll window positions and sizes
+     fzf --preview="head {}" --preview-window=up:30%
+     fzf --preview="file {}" --preview-window=down:1
+
+     # Initial scroll offset is set to the line number of each line of
+     # git grep output *minus* 5 lines (-5)
+     git grep --line-number '' |
+       fzf --delimiter : --preview 'nl {1}' --preview-window +{2}-5
+
+     # Preview with bat, matching line in the middle of the window (-/2)
+     git grep --line-number '' |
+       fzf --delimiter : \\
+           --preview 'bat --style=numbers --color=always --highlight-line {2} {1}' \\
+           --preview-window +{2}-/2\fR
+
+.RE
+
+.SS Scripting
+.TP
+.BI "-q, --query=" "STR"
+Start the finder with the given query
+.TP
+.B "-1, --select-1"
+Automatically select the only match
+.TP
+.B "-0, --exit-0"
+Exit immediately when there's no match
+.TP
+.BI "-f, --filter=" "STR"
+Filter mode. Do not start interactive finder. When used with \fB--no-sort\fR,
+fzf becomes a fuzzy-version of grep.
+.TP
+.B "--print-query"
+Print query as the first line
+.TP
+.BI "--expect=" "KEY[,..]"
+Comma-separated list of keys that can be used to complete fzf in addition to
+the default enter key. When this option is set, fzf will print the name of the
+key pressed as the first line of its output (or as the second line if
+\fB--print-query\fR is also used). The line will be empty if fzf is completed
+with the default enter key. If \fB--expect\fR option is specified multiple
+times, fzf will expect the union of the keys. \fB--no-expect\fR will clear the
+list.
+
+.RS
+e.g.
+     \fBfzf --expect=ctrl-v,ctrl-t,alt-s --expect=f1,f2,~,@\fR
+.RE
+.TP
+.B "--read0"
+Read input delimited by ASCII NUL characters instead of newline characters
+.TP
+.B "--print0"
+Print output delimited by ASCII NUL characters instead of newline characters
+.TP
+.B "--no-clear"
+Do not clear finder interface on exit. If fzf was started in full screen mode,
+it will not switch back to the original screen, so you'll have to manually run
+\fBtput rmcup\fR to return. This option can be used to avoid flickering of the
+screen when your application needs to start fzf multiple times in order.
+.TP
+.B "--sync"
+Synchronous search for multi-staged filtering. If specified, fzf will launch
+ncurses finder only after the input stream is complete.
+
+.RS
+e.g. \fBfzf --multi | fzf --sync\fR
+.RE
+.TP
+.B "--version"
+Display version information and exit
+
+.TP
+Note that most options have the opposite versions with \fB--no-\fR prefix.
+
+.SH ENVIRONMENT VARIABLES
+.TP
+.B FZF_DEFAULT_COMMAND
+Default command to use when input is tty. On *nix systems, fzf runs the command
+with \fBsh -c\fR, so make sure that it's POSIX-compliant.
+.TP
+.B FZF_DEFAULT_OPTS
+Default options. e.g. \fBexport FZF_DEFAULT_OPTS="--extended --cycle"\fR
+
+.SH EXIT STATUS
+.BR 0 "      Normal exit"
+.br
+.BR 1 "      No match"
+.br
+.BR 2 "      Error"
+.br
+.BR 130 "    Interrupted with \fBCTRL-C\fR or \fBESC\fR"
+
+.SH FIELD INDEX EXPRESSION
+
+A field index expression can be a non-zero integer or a range expression
+([BEGIN]..[END]). \fB--nth\fR and \fB--with-nth\fR take a comma-separated list
+of field index expressions.
+
+.SS Examples
+.BR 1 "      The 1st field"
+.br
+.BR 2 "      The 2nd field"
+.br
+.BR -1 "     The last field"
+.br
+.BR -2 "     The 2nd to last field"
+.br
+.BR 3..5 "   From the 3rd field to the 5th field"
+.br
+.BR 2.. "    From the 2nd field to the last field"
+.br
+.BR ..-3 "   From the 1st field to the 3rd to the last field"
+.br
+.BR .. "     All the fields"
+.br
+
+.SH EXTENDED SEARCH MODE
+
+Unless specified otherwise, fzf will start in "extended-search mode". In this
+mode, you can specify multiple patterns delimited by spaces, such as: \fB'wild
+^music .mp3$ sbtrkt !rmx\fR
+
+You can prepend a backslash to a space (\fB\\ \fR) to match a literal space
+character.
+
+.SS Exact-match (quoted)
+A term that is prefixed by a single-quote character (\fB'\fR) is interpreted as
+an "exact-match" (or "non-fuzzy") term. fzf will search for the exact
+occurrences of the string.
+
+.SS Anchored-match
+A term can be prefixed by \fB^\fR, or suffixed by \fB$\fR to become an
+anchored-match term. Then fzf will search for the lines that start with or end
+with the given string. An anchored-match term is also an exact-match term.
+
+.SS Negation
+If a term is prefixed by \fB!\fR, fzf will exclude the lines that satisfy the
+term from the result. In this case, fzf performs exact match by default.
+
+.SS Exact-match by default
+If you don't prefer fuzzy matching and do not wish to "quote" (prefixing with
+\fB'\fR) every word, start fzf with \fB-e\fR or \fB--exact\fR option. Note that
+when \fB--exact\fR is set, \fB'\fR-prefix "unquotes" the term.
+
+.SS OR operator
+A single bar character term acts as an OR operator. For example, the following
+query matches entries that start with \fBcore\fR and end with either \fBgo\fR,
+\fBrb\fR, or \fBpy\fR.
+
+e.g. \fB^core go$ | rb$ | py$\fR
+
+.SH KEY/EVENT BINDINGS
+\fB--bind\fR option allows you to bind \fBa key\fR or \fBan event\fR to one or
+more \fBactions\fR. You can use it to customize key bindings or implement
+dynamic behaviors.
+
+\fB--bind\fR takes a comma-separated list of binding expressions. Each binding
+expression is \fBKEY:ACTION\fR or \fBEVENT:ACTION\fR.
+
+e.g.
+     \fBfzf --bind=ctrl-j:accept,ctrl-k:kill-line\fR
+
+.SS AVAILABLE KEYS:    (SYNONYMS)
+\fIctrl-[a-z]\fR
+.br
+\fIctrl-space\fR
+.br
+\fIctrl-\\\fR
+.br
+\fIctrl-]\fR
+.br
+\fIctrl-^\fR      (\fIctrl-6\fR)
+.br
+\fIctrl-/\fR      (\fIctrl-_\fR)
+.br
+\fIctrl-alt-[a-z]\fR
+.br
+\fIalt-[a-z]\fR
+.br
+\fIalt-[0-9]\fR
+.br
+\fIf[1-12]\fR
+.br
+\fIenter\fR       (\fIreturn\fR \fIctrl-m\fR)
+.br
+\fIspace\fR
+.br
+\fIbspace\fR      (\fIbs\fR)
+.br
+\fIalt-up\fR
+.br
+\fIalt-down\fR
+.br
+\fIalt-left\fR
+.br
+\fIalt-right\fR
+.br
+\fIalt-enter\fR
+.br
+\fIalt-space\fR
+.br
+\fIalt-bspace\fR  (\fIalt-bs\fR)
+.br
+\fIalt-/\fR
+.br
+\fItab\fR
+.br
+\fIbtab\fR        (\fIshift-tab\fR)
+.br
+\fIesc\fR
+.br
+\fIdel\fR
+.br
+\fIup\fR
+.br
+\fIdown\fR
+.br
+\fIleft\fR
+.br
+\fIright\fR
+.br
+\fIhome\fR
+.br
+\fIend\fR
+.br
+\fIinsert\fR
+.br
+\fIpgup\fR        (\fIpage-up\fR)
+.br
+\fIpgdn\fR        (\fIpage-down\fR)
+.br
+\fIshift-up\fR
+.br
+\fIshift-down\fR
+.br
+\fIshift-left\fR
+.br
+\fIshift-right\fR
+.br
+\fIleft-click\fR
+.br
+\fIright-click\fR
+.br
+\fIdouble-click\fR
+.br
+or any single character
+
+.SS AVAILABLE EVENTS:
+\fIchange\fR
+.RS
+Triggered whenever the query string is changed
+
+e.g.
+     \fB# Moves cursor to the top (or bottom depending on --layout) whenever the query is changed
+     fzf --bind change:top\fR
+.RE
+
+\fIbackward-eof\fR
+.RS
+Triggered when the query string is already empty and you try to delete it
+backward.
+
+e.g.
+     \fBfzf --bind backward-eof:abort\fR
+.RE
+
+.SS AVAILABLE ACTIONS:
+A key or an event can be bound to one or more of the following actions.
+
+  \fBACTION:                   DEFAULT BINDINGS (NOTES):
+    \fBabort\fR                     \fIctrl-c  ctrl-g  ctrl-q  esc\fR
+    \fBaccept\fR                    \fIenter   double-click\fR
+    \fBaccept-non-empty\fR          (same as \fBaccept\fR except that it prevents fzf from exiting without selection)
+    \fBbackward-char\fR             \fIctrl-b  left\fR
+    \fBbackward-delete-char\fR      \fIctrl-h  bspace\fR
+    \fBbackward-delete-char/eof\fR  (same as \fBbackward-delete-char\fR except aborts fzf if query is empty)
+    \fBbackward-kill-word\fR        \fIalt-bs\fR
+    \fBbackward-word\fR             \fIalt-b   shift-left\fR
+    \fBbeginning-of-line\fR         \fIctrl-a  home\fR
+    \fBcancel\fR                    (clear query string if not empty, abort fzf otherwise)
+    \fBclear-screen\fR              \fIctrl-l\fR
+    \fBclear-selection\fR           (clear multi-selection)
+    \fBclear-query\fR               (clear query string)
+    \fBdelete-char\fR               \fIdel\fR
+    \fBdelete-char/eof\fR           \fIctrl-d\fR (same as \fBdelete-char\fR except aborts fzf if query is empty)
+    \fBdeselect-all\fR              (deselect all matches)
+    \fBdown\fR                      \fIctrl-j  ctrl-n  down\fR
+    \fBend-of-line\fR               \fIctrl-e  end\fR
+    \fBexecute(...)\fR              (see below for the details)
+    \fBexecute-silent(...)\fR       (see below for the details)
+    \fBforward-char\fR              \fIctrl-f  right\fR
+    \fBforward-word\fR              \fIalt-f   shift-right\fR
+    \fBignore\fR
+    \fBjump\fR                      (EasyMotion-like 2-keystroke movement)
+    \fBjump-accept\fR               (jump and accept)
+    \fBkill-line\fR
+    \fBkill-word\fR                 \fIalt-d\fR
+    \fBnext-history\fR              (\fIctrl-n\fR on \fB--history\fR)
+    \fBpage-down\fR                 \fIpgdn\fR
+    \fBpage-up\fR                   \fIpgup\fR
+    \fBhalf-page-down\fR
+    \fBhalf-page-up\fR
+    \fBpreview(...)\fR              (see below for the details)
+    \fBpreview-down\fR              \fIshift-down\fR
+    \fBpreview-up\fR                \fIshift-up\fR
+    \fBpreview-page-down\fR
+    \fBpreview-page-up\fR
+    \fBpreview-half-page-down\fR
+    \fBpreview-half-page-up\fR
+    \fBprevious-history\fR          (\fIctrl-p\fR on \fB--history\fR)
+    \fBprint-query\fR               (print query and exit)
+    \fBrefresh-preview\fR
+    \fBreload(...)\fR               (see below for the details)
+    \fBreplace-query\fR             (replace query string with the current selection)
+    \fBselect-all\fR                (select all matches)
+    \fBtoggle\fR                    (\fIright-click\fR)
+    \fBtoggle-all\fR                (toggle all matches)
+    \fBtoggle+down\fR               \fIctrl-i  (tab)\fR
+    \fBtoggle-in\fR                 (\fB--layout=reverse*\fR ? \fBtoggle+up\fR : \fBtoggle+down\fR)
+    \fBtoggle-out\fR                (\fB--layout=reverse*\fR ? \fBtoggle+down\fR : \fBtoggle+up\fR)
+    \fBtoggle-preview\fR
+    \fBtoggle-preview-wrap\fR
+    \fBtoggle-sort\fR
+    \fBtoggle+up\fR                 \fIbtab    (shift-tab)\fR
+    \fBtop\fR                       (move to the top result)
+    \fBunix-line-discard\fR         \fIctrl-u\fR
+    \fBunix-word-rubout\fR          \fIctrl-w\fR
+    \fBup\fR                        \fIctrl-k  ctrl-p  up\fR
+    \fByank\fR                      \fIctrl-y\fR
+
+.SS ACTION COMPOSITION
+
+Multiple actions can be chained using \fB+\fR separator.
+
+e.g.
+     \fBfzf --bind 'ctrl-a:select-all+accept'\fR
+
+.SS COMMAND EXECUTION
+
+With \fBexecute(...)\fR action, you can execute arbitrary commands without
+leaving fzf. For example, you can turn fzf into a simple file browser by
+binding \fBenter\fR key to \fBless\fR command like follows.
+
+    \fBfzf --bind "enter:execute(less {})"\fR
+
+You can use the same placeholder expressions as in \fB--preview\fR.
+
+If the command contains parentheses, fzf may fail to parse the expression. In
+that case, you can use any of the following alternative notations to avoid
+parse errors.
+
+    \fBexecute[...]\fR
+    \fBexecute~...~\fR
+    \fBexecute!...!\fR
+    \fBexecute@...@\fR
+    \fBexecute#...#\fR
+    \fBexecute$...$\fR
+    \fBexecute%...%\fR
+    \fBexecute^...^\fR
+    \fBexecute&...&\fR
+    \fBexecute*...*\fR
+    \fBexecute;...;\fR
+    \fBexecute/.../\fR
+    \fBexecute|...|\fR
+    \fBexecute:...\fR
+.RS
+The last one is the special form that frees you from parse errors as it does
+not expect the closing character. The catch is that it should be the last one
+in the comma-separated list of key-action pairs.
+.RE
+
+fzf switches to the alternate screen when executing a command. However, if the
+command is expected to complete quickly, and you are not interested in its
+output, you might want to use \fBexecute-silent\fR instead, which silently
+executes the command without the switching. Note that fzf will not be
+responsive until the command is complete. For asynchronous execution, start
+your command as a background process (i.e. appending \fB&\fR).
+
+.SS RELOAD INPUT
+
+\fBreload(...)\fR action is used to dynamically update the input list
+without restarting fzf. It takes the same command template with placeholder
+expressions as \fBexecute(...)\fR.
+
+See \fIhttps://github.com/junegunn/fzf/issues/1750\fR for more info.
+
+e.g.
+     \fB# Update the list of processes by pressing CTRL-R
+     ps -ef | fzf --bind 'ctrl-r:reload(ps -ef)' --header 'Press CTRL-R to reload' \\
+                  --header-lines=1 --layout=reverse
+
+     # Integration with ripgrep
+     RG_PREFIX="rg --column --line-number --no-heading --color=always --smart-case "
+     INITIAL_QUERY="foobar"
+     FZF_DEFAULT_COMMAND="$RG_PREFIX '$INITIAL_QUERY'" \\
+       fzf --bind "change:reload:$RG_PREFIX {q} || true" \\
+           --ansi --phony --query "$INITIAL_QUERY"\fR
+
+.SS PREVIEW BINDING
+
+With \fBpreview(...)\fR action, you can specify multiple different preview
+commands in addition to the default preview command given by \fB--preview\fR
+option.
+
+e.g.
+
+     # Default preview command with an extra preview binding
+     fzf --preview 'file {}' --bind '?:preview:cat {}'
+
+     # A preview binding with no default preview command
+     # (Preview window is initially empty)
+     fzf --bind '?:preview:cat {}'
+
+     # Preview window hidden by default, it appears when you first hit '?'
+     fzf --bind '?:preview:cat {}' --preview-window hidden
+
+.SH AUTHOR
+Junegunn Choi (\fIjunegunn.c@gmail.com\fR)
+
+.SH SEE ALSO
+.B Project homepage:
+.RS
+.I https://github.com/junegunn/fzf
+.RE
+.br
+
+.br
+.B Extra Vim plugin:
+.RS
+.I https://github.com/junegunn/fzf.vim
+.RE
+
+.SH LICENSE
+MIT

plugin/fzf.vim

@@ -1,4 +1,4 @@
-" Copyright (c) 2013 Junegunn Choi
+" Copyright (c) 2017 Junegunn Choi
 "
 " MIT License
 "
@@ -21,27 +21,964 @@
 " OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 " WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
-let s:exec = expand('<sfile>:h:h').'/fzf'
+if exists('g:loaded_fzf')
+  finish
+endif
+let g:loaded_fzf = 1
 
-function! fzf#run(command, args)
-  try
-    let tf      = tempname()
-    let prefix  = exists('g:fzf_source') ? g:fzf_source.'|' : ''
-    let fzf     = executable(s:exec)     ? s:exec : 'fzf'
-    let options = empty(a:args)          ? get(g:, 'fzf_options', '') : a:args
-    execute "silent !".prefix.fzf.' '.options." > ".tf
-    if !v:shell_error
-      for line in readfile(tf)
-        if !empty(line)
-          execute a:command.' '.line
-        endif
-      endfor
+let s:is_win = has('win32') || has('win64')
+if s:is_win && &shellslash
+  set noshellslash
+  let s:base_dir = expand('<sfile>:h:h')
+  set shellslash
+else
+  let s:base_dir = expand('<sfile>:h:h')
+endif
+if s:is_win
+  let s:term_marker = '&::FZF'
+
+  function! s:fzf_call(fn, ...)
+    let shellslash = &shellslash
+    try
+      set noshellslash
+      return call(a:fn, a:000)
+    finally
+      let &shellslash = shellslash
+    endtry
+  endfunction
+
+  " Use utf-8 for fzf.vim commands
+  " Return array of shell commands for cmd.exe
+  function! s:enc_to_cp(str)
+    if !has('iconv')
+      return a:str
     endif
+    if !exists('s:codepage')
+      let s:codepage = libcallnr('kernel32.dll', 'GetACP', 0)
+    endif
+    return iconv(a:str, &encoding, 'cp'.s:codepage)
+  endfunction
+  function! s:wrap_cmds(cmds)
+    return map([
+      \ '@echo off',
+      \ 'setlocal enabledelayedexpansion']
+    \ + (has('gui_running') ? ['set TERM= > nul'] : [])
+    \ + (type(a:cmds) == type([]) ? a:cmds : [a:cmds])
+    \ + ['endlocal'],
+    \ '<SID>enc_to_cp(v:val."\r")')
+  endfunction
+else
+  let s:term_marker = ";#FZF"
+
+  function! s:fzf_call(fn, ...)
+    return call(a:fn, a:000)
+  endfunction
+
+  function! s:wrap_cmds(cmds)
+    return a:cmds
+  endfunction
+
+  function! s:enc_to_cp(str)
+    return a:str
+  endfunction
+endif
+
+function! s:shellesc_cmd(arg)
+  let escaped = substitute(a:arg, '[&|<>()@^]', '^&', 'g')
+  let escaped = substitute(escaped, '%', '%%', 'g')
+  let escaped = substitute(escaped, '"', '\\^&', 'g')
+  let escaped = substitute(escaped, '\(\\\+\)\(\\^\)', '\1\1\2', 'g')
+  return '^"'.substitute(escaped, '\(\\\+\)$', '\1\1', '').'^"'
+endfunction
+
+function! fzf#shellescape(arg, ...)
+  let shell = get(a:000, 0, s:is_win ? 'cmd.exe' : 'sh')
+  if shell =~# 'cmd.exe$'
+    return s:shellesc_cmd(a:arg)
+  endif
+  return s:fzf_call('shellescape', a:arg)
+endfunction
+
+function! s:fzf_getcwd()
+  return s:fzf_call('getcwd')
+endfunction
+
+function! s:fzf_fnamemodify(fname, mods)
+  return s:fzf_call('fnamemodify', a:fname, a:mods)
+endfunction
+
+function! s:fzf_expand(fmt)
+  return s:fzf_call('expand', a:fmt, 1)
+endfunction
+
+function! s:fzf_tempname()
+  return s:fzf_call('tempname')
+endfunction
+
+let s:layout_keys = ['window', 'tmux', 'up', 'down', 'left', 'right']
+let s:fzf_go = s:base_dir.'/bin/fzf'
+let s:fzf_tmux = s:base_dir.'/bin/fzf-tmux'
+
+let s:cpo_save = &cpo
+set cpo&vim
+
+function! s:popup_support()
+  return has('nvim') ? has('nvim-0.4') : has('popupwin') && has('patch-8.2.191')
+endfunction
+
+function! s:default_layout()
+  return s:popup_support()
+        \ ? { 'window' : { 'width': 0.9, 'height': 0.6 } }
+        \ : { 'down': '~40%' }
+endfunction
+
+function! fzf#install()
+  if s:is_win && !has('win32unix')
+    let script = s:base_dir.'/install.ps1'
+    if !filereadable(script)
+      throw script.' not found'
+    endif
+    let script = 'powershell -ExecutionPolicy Bypass -file ' . script
+  else
+    let script = s:base_dir.'/install'
+    if !executable(script)
+      throw script.' not found'
+    endif
+    let script .= ' --bin'
+  endif
+
+  call s:warn('Running fzf installer ...')
+  call system(script)
+  if v:shell_error
+    throw 'Failed to download fzf: '.script
+  endif
+endfunction
+
+function! s:version_requirement(val, min)
+  let val = split(a:val, '\.')
+  let min = split(a:min, '\.')
+  for idx in range(0, len(min) - 1)
+    let v = get(val, idx, 0)
+    if     v < min[idx] | return 0
+    elseif v > min[idx] | return 1
+    endif
+  endfor
+  return 1
+endfunction
+
+let s:checked = {}
+function! fzf#exec(...)
+  if !exists('s:exec')
+    if executable(s:fzf_go)
+      let s:exec = s:fzf_go
+    elseif executable('fzf')
+      let s:exec = 'fzf'
+    elseif input('fzf executable not found. Download binary? (y/n) ') =~? '^y'
+      redraw
+      call fzf#install()
+      return fzf#exec()
+    else
+      redraw
+      throw 'fzf executable not found'
+    endif
+  endif
+
+  if a:0 && !has_key(s:checked, a:1)
+    let command = s:exec . ' --version'
+    let output = systemlist(command)
+    if v:shell_error || empty(output)
+      throw printf('Failed to run "%s": %s', command, output)
+    endif
+    let fzf_version = matchstr(output[0], '[0-9.]\+')
+    if s:version_requirement(fzf_version, a:1)
+      let s:checked[a:1] = 1
+      return s:exec
+    elseif a:0 < 2 && input(printf('You need fzf %s or above. Found: %s. Download binary? (y/n) ', a:1, fzf_version)) =~? '^y'
+      redraw
+      call fzf#install()
+      return fzf#exec(a:1, 1)
+    else
+      throw printf('You need to upgrade fzf (required: %s or above)', a:1)
+    endif
+  endif
+
+  return s:exec
+endfunction
+
+function! s:tmux_enabled()
+  if has('gui_running') || !exists('$TMUX')
+    return 0
+  endif
+
+  if exists('s:tmux')
+    return s:tmux
+  endif
+
+  let s:tmux = 0
+  if !executable(s:fzf_tmux)
+    if executable('fzf-tmux')
+      let s:fzf_tmux = 'fzf-tmux'
+    else
+      return 0
+    endif
+  endif
+
+  let output = system('tmux -V')
+  let s:tmux = !v:shell_error && output >= 'tmux 1.7'
+  return s:tmux
+endfunction
+
+function! s:escape(path)
+  let path = fnameescape(a:path)
+  return s:is_win ? escape(path, '$') : path
+endfunction
+
+function! s:error(msg)
+  echohl ErrorMsg
+  echom a:msg
+  echohl None
+endfunction
+
+function! s:warn(msg)
+  echohl WarningMsg
+  echom a:msg
+  echohl None
+endfunction
+
+function! s:has_any(dict, keys)
+  for key in a:keys
+    if has_key(a:dict, key)
+      return 1
+    endif
+  endfor
+  return 0
+endfunction
+
+function! s:open(cmd, target)
+  if stridx('edit', a:cmd) == 0 && s:fzf_fnamemodify(a:target, ':p') ==# s:fzf_expand('%:p')
+    return
+  endif
+  execute a:cmd s:escape(a:target)
+endfunction
+
+function! s:common_sink(action, lines) abort
+  if len(a:lines) < 2
+    return
+  endif
+  let key = remove(a:lines, 0)
+  let Cmd = get(a:action, key, 'e')
+  if type(Cmd) == type(function('call'))
+    return Cmd(a:lines)
+  endif
+  if len(a:lines) > 1
+    augroup fzf_swap
+      autocmd SwapExists * let v:swapchoice='o'
+            \| call s:warn('fzf: E325: swap file exists: '.s:fzf_expand('<afile>'))
+    augroup END
+  endif
+  try
+    let empty = empty(s:fzf_expand('%')) && line('$') == 1 && empty(getline(1)) && !&modified
+    " Preserve the current working directory in case it's changed during
+    " the execution (e.g. `set autochdir` or `autocmd BufEnter * lcd ...`)
+    let cwd = exists('w:fzf_pushd') ? w:fzf_pushd.dir : expand('%:p:h')
+    for item in a:lines
+      if item[0] != '~' && item !~ (s:is_win ? '^[A-Z]:\' : '^/')
+        let item = join([cwd, item], (s:is_win ? '\' : '/'))
+      endif
+      if empty
+        execute 'e' s:escape(item)
+        let empty = 0
+      else
+        call s:open(Cmd, item)
+      endif
+      if !has('patch-8.0.0177') && !has('nvim-0.2') && exists('#BufEnter')
+            \ && isdirectory(item)
+        doautocmd BufEnter
+      endif
+    endfor
+  catch /^Vim:Interrupt$/
   finally
-    redraw!
-    silent! call delete(tf)
+    silent! autocmd! fzf_swap
   endtry
 endfunction
 
-command! -nargs=* FZF call fzf#run('silent e', <q-args>)
+function! s:get_color(attr, ...)
+  let gui = !s:is_win && !has('win32unix') && has('termguicolors') && &termguicolors
+  let fam = gui ? 'gui' : 'cterm'
+  let pat = gui ? '^#[a-f0-9]\+' : '^[0-9]\+$'
+  for group in a:000
+    let code = synIDattr(synIDtrans(hlID(group)), a:attr, fam)
+    if code =~? pat
+      return code
+    endif
+  endfor
+  return ''
+endfunction
 
+function! s:defaults()
+  let rules = copy(get(g:, 'fzf_colors', {}))
+  let colors = join(map(items(filter(map(rules, 'call("s:get_color", v:val)'), '!empty(v:val)')), 'join(v:val, ":")'), ',')
+  return empty(colors) ? '' : fzf#shellescape('--color='.colors)
+endfunction
+
+function! s:validate_layout(layout)
+  for key in keys(a:layout)
+    if index(s:layout_keys, key) < 0
+      throw printf('Invalid entry in g:fzf_layout: %s (allowed: %s)%s',
+            \ key, join(s:layout_keys, ', '), key == 'options' ? '. Use $FZF_DEFAULT_OPTS.' : '')
+    endif
+  endfor
+  return a:layout
+endfunction
+
+function! s:evaluate_opts(options)
+  return type(a:options) == type([]) ?
+        \ join(map(copy(a:options), 'fzf#shellescape(v:val)')) : a:options
+endfunction
+
+" [name string,] [opts dict,] [fullscreen boolean]
+function! fzf#wrap(...)
+  let args = ['', {}, 0]
+  let expects = map(copy(args), 'type(v:val)')
+  let tidx = 0
+  for arg in copy(a:000)
+    let tidx = index(expects, type(arg) == 6 ? type(0) : type(arg), tidx)
+    if tidx < 0
+      throw 'Invalid arguments (expected: [name string] [opts dict] [fullscreen boolean])'
+    endif
+    let args[tidx] = arg
+    let tidx += 1
+    unlet arg
+  endfor
+  let [name, opts, bang] = args
+
+  if len(name)
+    let opts.name = name
+  end
+
+  " Layout: g:fzf_layout (and deprecated g:fzf_height)
+  if bang
+    for key in s:layout_keys
+      if has_key(opts, key)
+        call remove(opts, key)
+      endif
+    endfor
+  elseif !s:has_any(opts, s:layout_keys)
+    if !exists('g:fzf_layout') && exists('g:fzf_height')
+      let opts.down = g:fzf_height
+    else
+      let opts = extend(opts, s:validate_layout(get(g:, 'fzf_layout', s:default_layout())))
+    endif
+  endif
+
+  " Colors: g:fzf_colors
+  let opts.options = s:defaults() .' '. s:evaluate_opts(get(opts, 'options', ''))
+
+  " History: g:fzf_history_dir
+  if len(name) && len(get(g:, 'fzf_history_dir', ''))
+    let dir = s:fzf_expand(g:fzf_history_dir)
+    if !isdirectory(dir)
+      call mkdir(dir, 'p')
+    endif
+    let history = fzf#shellescape(dir.'/'.name)
+    let opts.options = join(['--history', history, opts.options])
+  endif
+
+  " Action: g:fzf_action
+  if !s:has_any(opts, ['sink', 'sink*'])
+    let opts._action = get(g:, 'fzf_action', s:default_action)
+    let opts.options .= ' --expect='.join(keys(opts._action), ',')
+    function! opts.sink(lines) abort
+      return s:common_sink(self._action, a:lines)
+    endfunction
+    let opts['sink*'] = remove(opts, 'sink')
+  endif
+
+  return opts
+endfunction
+
+function! s:use_sh()
+  let [shell, shellslash, shellcmdflag, shellxquote] = [&shell, &shellslash, &shellcmdflag, &shellxquote]
+  if s:is_win
+    set shell=cmd.exe
+    set noshellslash
+    let &shellcmdflag = has('nvim') ? '/s /c' : '/c'
+    let &shellxquote = has('nvim') ? '"' : '('
+  else
+    set shell=sh
+  endif
+  return [shell, shellslash, shellcmdflag, shellxquote]
+endfunction
+
+function! fzf#run(...) abort
+try
+  let [shell, shellslash, shellcmdflag, shellxquote] = s:use_sh()
+
+  let dict   = exists('a:1') ? copy(a:1) : {}
+  let temps  = { 'result': s:fzf_tempname() }
+  let optstr = s:evaluate_opts(get(dict, 'options', ''))
+  try
+    let fzf_exec = fzf#shellescape(fzf#exec())
+  catch
+    throw v:exception
+  endtry
+
+  if !has_key(dict, 'dir')
+    let dict.dir = s:fzf_getcwd()
+  endif
+  if has('win32unix') && has_key(dict, 'dir')
+    let dict.dir = fnamemodify(dict.dir, ':p')
+  endif
+
+  if has_key(dict, 'source')
+    let source = dict.source
+    let type = type(source)
+    if type == 1
+      let prefix = '( '.source.' )|'
+    elseif type == 3
+      let temps.input = s:fzf_tempname()
+      call writefile(source, temps.input)
+      let prefix = (s:is_win ? 'type ' : 'cat ').fzf#shellescape(temps.input).'|'
+    else
+      throw 'Invalid source type'
+    endif
+  else
+    let prefix = ''
+  endif
+
+  let prefer_tmux = get(g:, 'fzf_prefer_tmux', 0) || has_key(dict, 'tmux')
+  let use_height = has_key(dict, 'down') && !has('gui_running') &&
+        \ !(has('nvim') || s:is_win || has('win32unix') || s:present(dict, 'up', 'left', 'right', 'window')) &&
+        \ executable('tput') && filereadable('/dev/tty')
+  let has_vim8_term = has('terminal') && has('patch-8.0.995')
+  let has_nvim_term = has('nvim-0.2.1') || has('nvim') && !s:is_win
+  let use_term = has_nvim_term ||
+    \ has_vim8_term && !has('win32unix') && (has('gui_running') || s:is_win || !use_height && s:present(dict, 'down', 'up', 'left', 'right', 'window'))
+  let use_tmux = (has_key(dict, 'tmux') || (!use_height && !use_term || prefer_tmux) && !has('win32unix') && s:splittable(dict)) && s:tmux_enabled()
+  if prefer_tmux && use_tmux
+    let use_height = 0
+    let use_term = 0
+  endif
+  if use_height
+    let height = s:calc_size(&lines, dict.down, dict)
+    let optstr .= ' --height='.height
+  elseif use_term
+    let optstr .= ' --no-height'
+  endif
+  let optstr .= s:border_opt(get(dict, 'window', 0))
+  let command = prefix.(use_tmux ? s:fzf_tmux(dict) : fzf_exec).' '.optstr.' > '.temps.result
+
+  if use_term
+    return s:execute_term(dict, command, temps)
+  endif
+
+  let lines = use_tmux ? s:execute_tmux(dict, command, temps)
+                 \ : s:execute(dict, command, use_height, temps)
+  call s:callback(dict, lines)
+  return lines
+finally
+  let [&shell, &shellslash, &shellcmdflag, &shellxquote] = [shell, shellslash, shellcmdflag, shellxquote]
+endtry
+endfunction
+
+function! s:present(dict, ...)
+  for key in a:000
+    if !empty(get(a:dict, key, ''))
+      return 1
+    endif
+  endfor
+  return 0
+endfunction
+
+function! s:fzf_tmux(dict)
+  let size = get(a:dict, 'tmux', '')
+  if empty(size)
+    for o in ['up', 'down', 'left', 'right']
+      if s:present(a:dict, o)
+        let spec = a:dict[o]
+        if (o == 'up' || o == 'down') && spec[0] == '~'
+          let size = '-'.o[0].s:calc_size(&lines, spec, a:dict)
+        else
+          " Legacy boolean option
+          let size = '-'.o[0].(spec == 1 ? '' : substitute(spec, '^\~', '', ''))
+        endif
+        break
+      endif
+    endfor
+  endif
+  return printf('LINES=%d COLUMNS=%d %s %s %s --',
+    \ &lines, &columns, fzf#shellescape(s:fzf_tmux), size, (has_key(a:dict, 'source') ? '' : '-'))
+endfunction
+
+function! s:splittable(dict)
+  return s:present(a:dict, 'up', 'down') && &lines > 15 ||
+        \ s:present(a:dict, 'left', 'right') && &columns > 40
+endfunction
+
+function! s:pushd(dict)
+  if s:present(a:dict, 'dir')
+    let cwd = s:fzf_getcwd()
+    let w:fzf_pushd = {
+    \   'command': haslocaldir() ? 'lcd' : (exists(':tcd') && haslocaldir(-1) ? 'tcd' : 'cd'),
+    \   'origin': cwd,
+    \   'bufname': bufname('')
+    \ }
+    execute 'lcd' s:escape(a:dict.dir)
+    let cwd = s:fzf_getcwd()
+    let w:fzf_pushd.dir = cwd
+    let a:dict.pushd = w:fzf_pushd
+    return cwd
+  endif
+  return ''
+endfunction
+
+augroup fzf_popd
+  autocmd!
+  autocmd WinEnter * call s:dopopd()
+augroup END
+
+function! s:dopopd()
+  if !exists('w:fzf_pushd')
+    return
+  endif
+
+  " FIXME: We temporarily change the working directory to 'dir' entry
+  " of options dictionary (set to the current working directory if not given)
+  " before running fzf.
+  "
+  " e.g. call fzf#run({'dir': '/tmp', 'source': 'ls', 'sink': 'e'})
+  "
+  " After processing the sink function, we have to restore the current working
+  " directory. But doing so may not be desirable if the function changed the
+  " working directory on purpose.
+  "
+  " So how can we tell if we should do it or not? A simple heuristic we use
+  " here is that we change directory only if the current working directory
+  " matches 'dir' entry. However, it is possible that the sink function did
+  " change the directory to 'dir'. In that case, the user will have an
+  " unexpected result.
+  if s:fzf_getcwd() ==# w:fzf_pushd.dir && (!&autochdir || w:fzf_pushd.bufname ==# bufname(''))
+    execute w:fzf_pushd.command s:escape(w:fzf_pushd.origin)
+  endif
+  unlet! w:fzf_pushd
+endfunction
+
+function! s:xterm_launcher()
+  let fmt = 'xterm -T "[fzf]" -bg "%s" -fg "%s" -geometry %dx%d+%d+%d -e bash -ic %%s'
+  if has('gui_macvim')
+    let fmt .= '&& osascript -e "tell application \"MacVim\" to activate"'
+  endif
+  return printf(fmt,
+    \ escape(synIDattr(hlID("Normal"), "bg"), '#'), escape(synIDattr(hlID("Normal"), "fg"), '#'),
+    \ &columns, &lines/2, getwinposx(), getwinposy())
+endfunction
+unlet! s:launcher
+if s:is_win || has('win32unix')
+  let s:launcher = '%s'
+else
+  let s:launcher = function('s:xterm_launcher')
+endif
+
+function! s:exit_handler(code, command, ...)
+  if a:code == 130
+    return 0
+  elseif has('nvim') && a:code == 129
+    " When deleting the terminal buffer while fzf is still running,
+    " Nvim sends SIGHUP.
+    return 0
+  elseif a:code > 1
+    call s:error('Error running ' . a:command)
+    if !empty(a:000)
+      sleep
+    endif
+    return 0
+  endif
+  return 1
+endfunction
+
+function! s:execute(dict, command, use_height, temps) abort
+  call s:pushd(a:dict)
+  if has('unix') && !a:use_height
+    silent! !clear 2> /dev/null
+  endif
+  let escaped = (a:use_height || s:is_win) ? a:command : escape(substitute(a:command, '\n', '\\n', 'g'), '%#!')
+  if has('gui_running')
+    let Launcher = get(a:dict, 'launcher', get(g:, 'Fzf_launcher', get(g:, 'fzf_launcher', s:launcher)))
+    let fmt = type(Launcher) == 2 ? call(Launcher, []) : Launcher
+    if has('unix')
+      let escaped = "'".substitute(escaped, "'", "'\"'\"'", 'g')."'"
+    endif
+    let command = printf(fmt, escaped)
+  else
+    let command = escaped
+  endif
+  if s:is_win
+    let batchfile = s:fzf_tempname().'.bat'
+    call writefile(s:wrap_cmds(command), batchfile)
+    let command = batchfile
+    let a:temps.batchfile = batchfile
+    if has('nvim')
+      let fzf = {}
+      let fzf.dict = a:dict
+      let fzf.temps = a:temps
+      function! fzf.on_exit(job_id, exit_status, event) dict
+        call s:pushd(self.dict)
+        let lines = s:collect(self.temps)
+        call s:callback(self.dict, lines)
+      endfunction
+      let cmd = 'start /wait cmd /c '.command
+      call jobstart(cmd, fzf)
+      return []
+    endif
+  elseif has('win32unix') && $TERM !=# 'cygwin'
+    let shellscript = s:fzf_tempname()
+    call writefile([command], shellscript)
+    let command = 'cmd.exe /C '.fzf#shellescape('set "TERM=" & start /WAIT sh -c '.shellscript)
+    let a:temps.shellscript = shellscript
+  endif
+  if a:use_height
+    let stdin = has_key(a:dict, 'source') ? '' : '< /dev/tty'
+    call system(printf('tput cup %d > /dev/tty; tput cnorm > /dev/tty; %s %s 2> /dev/tty', &lines, command, stdin))
+  else
+    execute 'silent !'.command
+  endif
+  let exit_status = v:shell_error
+  redraw!
+  return s:exit_handler(exit_status, command) ? s:collect(a:temps) : []
+endfunction
+
+function! s:execute_tmux(dict, command, temps) abort
+  let command = a:command
+  let cwd = s:pushd(a:dict)
+  if len(cwd)
+    " -c '#{pane_current_path}' is only available on tmux 1.9 or above
+    let command = join(['cd', fzf#shellescape(cwd), '&&', command])
+  endif
+
+  call system(command)
+  let exit_status = v:shell_error
+  redraw!
+  return s:exit_handler(exit_status, command) ? s:collect(a:temps) : []
+endfunction
+
+function! s:calc_size(max, val, dict)
+  let val = substitute(a:val, '^\~', '', '')
+  if val =~ '%$'
+    let size = a:max * str2nr(val[:-2]) / 100
+  else
+    let size = min([a:max, str2nr(val)])
+  endif
+
+  let srcsz = -1
+  if type(get(a:dict, 'source', 0)) == type([])
+    let srcsz = len(a:dict.source)
+  endif
+
+  let opts = $FZF_DEFAULT_OPTS.' '.s:evaluate_opts(get(a:dict, 'options', ''))
+  if opts =~ 'preview'
+    return size
+  endif
+  let margin = match(opts, '--inline-info\|--info[^-]\{-}inline') > match(opts, '--no-inline-info\|--info[^-]\{-}\(default\|hidden\)') ? 1 : 2
+  let margin += stridx(opts, '--border') > stridx(opts, '--no-border') ? 2 : 0
+  if stridx(opts, '--header') > stridx(opts, '--no-header')
+    let margin += len(split(opts, "\n"))
+  endif
+  return srcsz >= 0 ? min([srcsz + margin, size]) : size
+endfunction
+
+function! s:getpos()
+  return {'tab': tabpagenr(), 'win': winnr(), 'winid': win_getid(), 'cnt': winnr('$'), 'tcnt': tabpagenr('$')}
+endfunction
+
+function! s:border_opt(window)
+  if type(a:window) != type({})
+    return ''
+  endif
+
+  " Border style
+  let style = tolower(get(a:window, 'border', 'rounded'))
+  if !has_key(a:window, 'border') && !get(a:window, 'rounded', 1)
+    let style = 'sharp'
+  endif
+  if style == 'none'
+    return ''
+  endif
+
+  " For --border styles, we need fzf 0.24.0 or above
+  call fzf#exec('0.24.0')
+  let opt = ' --border=' . style
+  if has_key(a:window, 'highlight')
+    let color = s:get_color('fg', a:window.highlight)
+    if len(color)
+      let opt .= ' --color=border:' . color
+    endif
+  endif
+  return opt
+endfunction
+
+function! s:split(dict)
+  let directions = {
+  \ 'up':    ['topleft', 'resize', &lines],
+  \ 'down':  ['botright', 'resize', &lines],
+  \ 'left':  ['vertical topleft', 'vertical resize', &columns],
+  \ 'right': ['vertical botright', 'vertical resize', &columns] }
+  let ppos = s:getpos()
+  let is_popup = 0
+  try
+    if s:present(a:dict, 'window')
+      if type(a:dict.window) == type({})
+        if !s:popup_support()
+          throw 'Nvim 0.4+ or Vim 8.2.191+ with popupwin feature is required for pop-up window'
+        end
+        call s:popup(a:dict.window)
+        let is_popup = 1
+      else
+        execute 'keepalt' a:dict.window
+      endif
+    elseif !s:splittable(a:dict)
+      execute (tabpagenr()-1).'tabnew'
+    else
+      for [dir, triple] in items(directions)
+        let val = get(a:dict, dir, '')
+        if !empty(val)
+          let [cmd, resz, max] = triple
+          if (dir == 'up' || dir == 'down') && val[0] == '~'
+            let sz = s:calc_size(max, val, a:dict)
+          else
+            let sz = s:calc_size(max, val, {})
+          endif
+          execute cmd sz.'new'
+          execute resz sz
+          return [ppos, {}, is_popup]
+        endif
+      endfor
+    endif
+    return [ppos, is_popup ? {} : { '&l:wfw': &l:wfw, '&l:wfh': &l:wfh }, is_popup]
+  finally
+    if !is_popup
+      setlocal winfixwidth winfixheight
+    endif
+  endtry
+endfunction
+
+function! s:execute_term(dict, command, temps) abort
+  let winrest = winrestcmd()
+  let pbuf = bufnr('')
+  let [ppos, winopts, is_popup] = s:split(a:dict)
+  call s:use_sh()
+  let b:fzf = a:dict
+  let fzf = { 'buf': bufnr(''), 'pbuf': pbuf, 'ppos': ppos, 'dict': a:dict, 'temps': a:temps,
+            \ 'winopts': winopts, 'winrest': winrest, 'lines': &lines,
+            \ 'columns': &columns, 'command': a:command }
+  function! fzf.switch_back(inplace)
+    if a:inplace && bufnr('') == self.buf
+      if bufexists(self.pbuf)
+        execute 'keepalt b' self.pbuf
+      endif
+      " No other listed buffer
+      if bufnr('') == self.buf
+        enew
+      endif
+    endif
+  endfunction
+  function! fzf.on_exit(id, code, ...)
+    if s:getpos() == self.ppos " {'window': 'enew'}
+      for [opt, val] in items(self.winopts)
+        execute 'let' opt '=' val
+      endfor
+      call self.switch_back(1)
+    else
+      if bufnr('') == self.buf
+        " We use close instead of bd! since Vim does not close the split when
+        " there's no other listed buffer (nvim +'set nobuflisted')
+        close
+      endif
+      silent! execute 'tabnext' self.ppos.tab
+      silent! execute self.ppos.win.'wincmd w'
+    endif
+
+    if bufexists(self.buf)
+      execute 'bd!' self.buf
+    endif
+
+    if &lines == self.lines && &columns == self.columns && s:getpos() == self.ppos
+      execute self.winrest
+    endif
+
+    if !s:exit_handler(a:code, self.command, 1)
+      return
+    endif
+
+    call s:pushd(self.dict)
+    let lines = s:collect(self.temps)
+    call s:callback(self.dict, lines)
+    call self.switch_back(s:getpos() == self.ppos)
+  endfunction
+
+  try
+    call s:pushd(a:dict)
+    if s:is_win
+      let fzf.temps.batchfile = s:fzf_tempname().'.bat'
+      call writefile(s:wrap_cmds(a:command), fzf.temps.batchfile)
+      let command = fzf.temps.batchfile
+    else
+      let command = a:command
+    endif
+    let command .= s:term_marker
+    if has('nvim')
+      call termopen(command, fzf)
+    else
+      let term_opts = {'exit_cb': function(fzf.on_exit)}
+      if is_popup
+        let term_opts.hidden = 1
+      else
+        let term_opts.curwin = 1
+      endif
+      let fzf.buf = term_start([&shell, &shellcmdflag, command], term_opts)
+      if is_popup && exists('#TerminalWinOpen')
+        doautocmd <nomodeline> TerminalWinOpen
+      endif
+      if !has('patch-8.0.1261') && !s:is_win
+        call term_wait(fzf.buf, 20)
+      endif
+    endif
+  finally
+    call s:dopopd()
+  endtry
+  setlocal nospell bufhidden=wipe nobuflisted nonumber
+  setf fzf
+  startinsert
+  return []
+endfunction
+
+function! s:collect(temps) abort
+  try
+    return filereadable(a:temps.result) ? readfile(a:temps.result) : []
+  finally
+    for tf in values(a:temps)
+      silent! call delete(tf)
+    endfor
+  endtry
+endfunction
+
+function! s:callback(dict, lines) abort
+  let popd = has_key(a:dict, 'pushd')
+  if popd
+    let w:fzf_pushd = a:dict.pushd
+  endif
+
+  try
+    if has_key(a:dict, 'sink')
+      for line in a:lines
+        if type(a:dict.sink) == 2
+          call a:dict.sink(line)
+        else
+          execute a:dict.sink s:escape(line)
+        endif
+      endfor
+    endif
+    if has_key(a:dict, 'sink*')
+      call a:dict['sink*'](a:lines)
+    endif
+  catch
+    if stridx(v:exception, ':E325:') < 0
+      echoerr v:exception
+    endif
+  endtry
+
+  " We may have opened a new window or tab
+  if popd
+    let w:fzf_pushd = a:dict.pushd
+    call s:dopopd()
+  endif
+endfunction
+
+if has('nvim')
+  function s:create_popup(hl, opts) abort
+    let buf = nvim_create_buf(v:false, v:true)
+    let opts = extend({'relative': 'editor', 'style': 'minimal'}, a:opts)
+    let border = has_key(opts, 'border') ? remove(opts, 'border') : []
+    let win = nvim_open_win(buf, v:true, opts)
+    call setwinvar(win, '&winhighlight', 'NormalFloat:'..a:hl)
+    call setwinvar(win, '&colorcolumn', '')
+    if !empty(border)
+      call nvim_buf_set_lines(buf, 0, -1, v:true, border)
+    endif
+    return buf
+  endfunction
+else
+  function! s:create_popup(hl, opts) abort
+    let is_frame = has_key(a:opts, 'border')
+    let s:popup_create = {buf -> popup_create(buf, #{
+      \ line: a:opts.row,
+      \ col: a:opts.col,
+      \ minwidth: a:opts.width,
+      \ minheight: a:opts.height,
+      \ zindex: 50 - is_frame,
+    \ })}
+    if is_frame
+      let id = s:popup_create('')
+      call setwinvar(id, '&wincolor', a:hl)
+      call setbufline(winbufnr(id), 1, a:opts.border)
+      execute 'autocmd BufWipeout * ++once call popup_close('..id..')'
+      return winbufnr(id)
+    else
+      autocmd TerminalOpen * ++once call s:popup_create(str2nr(expand('<abuf>')))
+    endif
+  endfunction
+endif
+
+function! s:popup(opts) abort
+  " Size and position
+  let width = min([max([8, a:opts.width > 1 ? a:opts.width : float2nr(&columns * a:opts.width)]), &columns])
+  let height = min([max([4, a:opts.height > 1 ? a:opts.height : float2nr(&lines * a:opts.height)]), &lines - has('nvim')])
+  let row = float2nr(get(a:opts, 'yoffset', 0.5) * (&lines - height))
+  let col = float2nr(get(a:opts, 'xoffset', 0.5) * (&columns - width))
+
+  " Managing the differences
+  let row = min([max([0, row]), &lines - has('nvim') - height])
+  let col = min([max([0, col]), &columns - width])
+  let row += !has('nvim')
+  let col += !has('nvim')
+
+  call s:create_popup('Normal', {
+    \ 'row': row, 'col': col, 'width': width, 'height': height
+  \ })
+endfunction
+
+let s:default_action = {
+  \ 'ctrl-t': 'tab split',
+  \ 'ctrl-x': 'split',
+  \ 'ctrl-v': 'vsplit' }
+
+function! s:shortpath()
+  let short = fnamemodify(getcwd(), ':~:.')
+  if !has('win32unix')
+    let short = pathshorten(short)
+  endif
+  let slash = (s:is_win && !&shellslash) ? '\' : '/'
+  return empty(short) ? '~'.slash : short . (short =~ escape(slash, '\').'$' ? '' : slash)
+endfunction
+
+function! s:cmd(bang, ...) abort
+  let args = copy(a:000)
+  let opts = { 'options': ['--multi'] }
+  if len(args) && isdirectory(expand(args[-1]))
+    let opts.dir = substitute(substitute(remove(args, -1), '\\\(["'']\)', '\1', 'g'), '[/\\]*$', '/', '')
+    if s:is_win && !&shellslash
+      let opts.dir = substitute(opts.dir, '/', '\\', 'g')
+    endif
+    let prompt = opts.dir
+  else
+    let prompt = s:shortpath()
+  endif
+  let prompt = strwidth(prompt) < &columns - 20 ? prompt : '> '
+  call extend(opts.options, ['--prompt', prompt])
+  call extend(opts.options, args)
+  call fzf#run(fzf#wrap('FZF', opts, a:bang))
+endfunction
+
+command! -nargs=* -complete=dir -bang FZF call s:cmd(<bang>0, <f-args>)
+
+let &cpo = s:cpo_save
+unlet s:cpo_save

shell/completion.bash

@@ -0,0 +1,372 @@
+#     ____      ____
+#    / __/___  / __/
+#   / /_/_  / / /_
+#  / __/ / /_/ __/
+# /_/   /___/_/ completion.bash
+#
+# - $FZF_TMUX               (default: 0)
+# - $FZF_TMUX_OPTS          (default: empty)
+# - $FZF_COMPLETION_TRIGGER (default: '**')
+# - $FZF_COMPLETION_OPTS    (default: empty)
+
+if [[ $- =~ i ]]; then
+
+# 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"
+    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() {
+    command find -L "$1" \
+      -name .git -prune -o -name .hg -prune -o -name .svn -prune -o -type d \
+      -a -not -path "$1" -print 2> /dev/null | sed 's@^\./@@'
+  }
+fi
+
+###########################################################
+
+# To redraw line after fzf closes (printf '\e[5n')
+bind '"\e[0n": redraw-current-line'
+
+__fzf_comprun() {
+  if [ "$(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_filter() {
+  sed 's/^\(.*-F\) *\([^ ]*\).* \([^ ]*\)$/export _fzf_orig_completion_\3="\1 %s \3 #\2"; [[ "\1" = *" -o nospace "* ]] \&\& [[ ! "$__fzf_nospace_commands" = *" \3 "* ]] \&\& __fzf_nospace_commands="$__fzf_nospace_commands \3 ";/' |
+  awk -F= '{OFS = FS} {gsub(/[^A-Za-z0-9_= ;]/, "_", $1);}1'
+}
+
+_fzf_opts_completion() {
+  local cur prev opts
+  COMPREPLY=()
+  cur="${COMP_WORDS[COMP_CWORD]}"
+  prev="${COMP_WORDS[COMP_CWORD-1]}"
+  opts="
+    -x --extended
+    -e --exact
+    --algo
+    -i +i
+    -n --nth
+    --with-nth
+    -d --delimiter
+    +s --no-sort
+    --tac
+    --tiebreak
+    -m --multi
+    --no-mouse
+    --bind
+    --cycle
+    --no-hscroll
+    --jump-labels
+    --height
+    --literal
+    --reverse
+    --margin
+    --inline-info
+    --prompt
+    --pointer
+    --marker
+    --header
+    --header-lines
+    --ansi
+    --tabstop
+    --color
+    --no-bold
+    --history
+    --history-size
+    --preview
+    --preview-window
+    -q --query
+    -1 --select-1
+    -0 --exit-0
+    -f --filter
+    --print-query
+    --expect
+    --sync"
+
+  case "${prev}" in
+  --tiebreak)
+    COMPREPLY=( $(compgen -W "length begin end index" -- "$cur") )
+    return 0
+    ;;
+  --color)
+    COMPREPLY=( $(compgen -W "dark light 16 bw" -- "$cur") )
+    return 0
+    ;;
+  --history)
+    COMPREPLY=()
+    return 0
+    ;;
+  esac
+
+  if [[ "$cur" =~ ^-|\+ ]]; then
+    COMPREPLY=( $(compgen -W "${opts}" -- "$cur") )
+    return 0
+  fi
+
+  return 0
+}
+
+_fzf_handle_dynamic_completion() {
+  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
+    $orig "$@"
+  elif [ -n "$_fzf_completion_loader" ]; then
+    orig_complete=$(complete -p "$orig_cmd" 2> /dev/null)
+    _completion_loader "$@"
+    ret=$?
+    # _completion_loader may not have updated completion for the command
+    if [ "$(complete -p "$orig_cmd" 2> /dev/null)" != "$orig_complete" ]; then
+      eval "$(complete | command grep " -F.* $orig_cmd$" | __fzf_orig_completion_filter)"
+      if [[ "$__fzf_nospace_commands" = *" $orig_cmd "* ]]; then
+        eval "${orig_complete/ -F / -o nospace -F }"
+      else
+        eval "$orig_complete"
+      fi
+    fi
+    return $ret
+  fi
+}
+
+__fzf_generic_path_completion() {
+  local cur base dir leftover matches trigger cmd
+  cmd="${COMP_WORDS[0]//[^A-Za-z0-9_=]/_}"
+  COMPREPLY=()
+  trigger=${FZF_COMPLETION_TRIGGER-'**'}
+  cur="${COMP_WORDS[COMP_CWORD]}"
+  if [[ "$cur" == *"$trigger" ]]; then
+    base=${cur:0:${#cur}-${#trigger}}
+    eval "base=$base"
+
+    [[ $base = *"/"* ]] && dir="$base"
+    while true; do
+      if [ -z "$dir" ] || [ -d "$dir" ]; then
+        leftover=${base/#"$dir"}
+        leftover=${leftover/#\/}
+        [ -z "$dir" ] && dir='.'
+        [ "$dir" != "/" ] && dir="${dir/%\//}"
+        matches=$(eval "$1 $(printf %q "$dir")" | FZF_DEFAULT_OPTS="--height ${FZF_TMUX_HEIGHT:-40%} --reverse $FZF_DEFAULT_OPTS $FZF_COMPLETION_OPTS $2" __fzf_comprun "$4" -q "$leftover" | while read -r item; do
+          printf "%q$3 " "$item"
+        done)
+        matches=${matches% }
+        [[ -z "$3" ]] && [[ "$__fzf_nospace_commands" = *" ${COMP_WORDS[0]} "* ]] && matches="$matches "
+        if [ -n "$matches" ]; then
+          COMPREPLY=( "$matches" )
+        else
+          COMPREPLY=( "$cur" )
+        fi
+        printf '\e[5n'
+        return 0
+      fi
+      dir=$(dirname "$dir")
+      [[ "$dir" =~ /$ ]] || dir="$dir"/
+    done
+  else
+    shift
+    shift
+    shift
+    _fzf_handle_dynamic_completion "$cmd" "$@"
+  fi
+}
+
+_fzf_complete() {
+  # Split arguments around --
+  local args rest str_arg i sep
+  args=("$@")
+  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
+
+  local cur selected trigger cmd post
+  post="$(caller 0 | awk '{print $2}')_post"
+  type -t "$post" > /dev/null 2>&1 || post=cat
+
+  cmd="${COMP_WORDS[0]//[^A-Za-z0-9_=]/_}"
+  trigger=${FZF_COMPLETION_TRIGGER-'**'}
+  cur="${COMP_WORDS[COMP_CWORD]}"
+  if [[ "$cur" == *"$trigger" ]]; then
+    cur=${cur:0:${#cur}-${#trigger}}
+
+    selected=$(FZF_DEFAULT_OPTS="--height ${FZF_TMUX_HEIGHT:-40%} --reverse $FZF_DEFAULT_OPTS $FZF_COMPLETION_OPTS $str_arg" __fzf_comprun "${rest[0]}" "${args[@]}" -q "$cur" | $post | tr '\n' ' ')
+    selected=${selected% } # Strip trailing space not to repeat "-o nospace"
+    if [ -n "$selected" ]; then
+      COMPREPLY=("$selected")
+    else
+      COMPREPLY=("$cur")
+    fi
+    printf '\e[5n'
+    return 0
+  else
+    _fzf_handle_dynamic_completion "$cmd" "${rest[@]}"
+  fi
+}
+
+_fzf_path_completion() {
+  __fzf_generic_path_completion _fzf_compgen_path "-m" "" "$@"
+}
+
+# Deprecated. No file only completion.
+_fzf_file_completion() {
+  _fzf_path_completion "$@"
+}
+
+_fzf_dir_completion() {
+  __fzf_generic_path_completion _fzf_compgen_dir "" "/" "$@"
+}
+
+_fzf_complete_kill() {
+  local trigger=${FZF_COMPLETION_TRIGGER-'**'}
+  local cur="${COMP_WORDS[COMP_CWORD]}"
+  if [[ -z "$cur" ]]; then
+    COMP_WORDS[$COMP_CWORD]=$trigger
+  elif [[ "$cur" != *"$trigger" ]]; then
+    return 1
+  fi
+
+  _fzf_proc_completion "$@"
+}
+
+_fzf_proc_completion() {
+  _fzf_complete -m --preview 'echo {}' --preview-window down:3:wrap --min-height 15 -- "$@" < <(
+    command ps -ef | sed 1d
+  )
+}
+
+_fzf_proc_completion_post() {
+  awk '{print $2}'
+}
+
+_fzf_host_completion() {
+  _fzf_complete +m -- "$@" < <(
+    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 | tr ',' '\n' | tr -d '[' | awk '{ print $1 " " $1 }') \
+        <(command grep -v '^\s*\(#\|$\)' /etc/hosts | command grep -Fv '0.0.0.0') |
+        awk '{if (length($2) > 0) {print $2}}' | sort -u
+  )
+}
+
+_fzf_var_completion() {
+  _fzf_complete -m -- "$@" < <(
+    declare -xp | sed 's/=.*//' | sed 's/.* //'
+  )
+}
+
+_fzf_alias_completion() {
+  _fzf_complete -m -- "$@" < <(
+    alias | sed 's/=.*//' | sed 's/.* //'
+  )
+}
+
+# fzf options
+complete -o default -F _fzf_opts_completion fzf
+
+d_cmds="${FZF_COMPLETION_DIR_COMMANDS:-cd pushd rmdir}"
+a_cmds="
+  awk cat diff diff3
+  emacs emacsclient ex file ftp g++ gcc gvim head hg java
+  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"
+
+# Preserve existing completion
+eval "$(complete |
+  sed -E '/-F/!d; / _fzf/d; '"/ ($(echo $d_cmds $a_cmds | sed 's/ /|/g; s/+/\\+/g'))$/"'!d' |
+  __fzf_orig_completion_filter)"
+
+if type _completion_loader > /dev/null 2>&1; then
+  _fzf_completion_loader=1
+fi
+
+__fzf_defc() {
+  local cmd func opts orig_var orig def
+  cmd="$1"
+  func="$2"
+  opts="$3"
+  orig_var="_fzf_orig_completion_${cmd//[^A-Za-z0-9_]/_}"
+  orig="${!orig_var}"
+  if [ -n "$orig" ]; then
+    printf -v def "$orig" "$func"
+    eval "$def"
+  else
+    complete -F "$func" $opts "$cmd"
+  fi
+}
+
+# Anything
+for cmd in $a_cmds; do
+  __fzf_defc "$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 dirnames"
+done
+
+# Kill completion (supports empty completion trigger)
+complete -F _fzf_complete_kill -o default -o bashdefault kill
+
+unset cmd d_cmds a_cmds
+
+_fzf_setup_completion() {
+  local kind fn cmd
+  kind=$1
+  fn=_fzf_${1}_completion
+  if [[ $# -lt 2 ]] || ! type -t "$fn" > /dev/null; then
+    echo "usage: ${FUNCNAME[0]} path|dir|var|alias|host|proc COMMANDS..."
+    return 1
+  fi
+  shift
+  eval "$(complete -p "$@" 2> /dev/null | grep -v "$fn" | __fzf_orig_completion_filter)"
+  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 / Hosts
+_fzf_setup_completion 'var'   export unset
+_fzf_setup_completion 'alias' unalias
+_fzf_setup_completion 'host'  ssh telnet
+
+fi

shell/completion.zsh

@@ -0,0 +1,329 @@
+#     ____      ____
+#    / __/___  / __/
+#   / /_/_  / / /_
+#  / __/ / /_/ __/
+# /_/   /___/_/ completion.zsh
+#
+# - $FZF_TMUX               (default: 0)
+# - $FZF_TMUX_OPTS          (default: '-d 40%')
+# - $FZF_COMPLETION_TRIGGER (default: '**')
+# - $FZF_COMPLETION_OPTS    (default: empty)
+
+# 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.
+'emulate' 'zsh' '-o' '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.
+{
+
+# Bail out if not interactive shell.
+[[ -o interactive ]] || return 0
+
+# 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"
+    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() {
+    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 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=$6
+
+  setopt localoptions nonomatch
+  eval "base=$base"
+  [[ $base = *"/"* ]] && dir="$base"
+  while [ 1 ]; do
+    if [[ -z "$dir" || -d ${dir} ]]; then
+      leftover=${base/#"$dir"}
+      leftover=${leftover/#\/}
+      [ -z "$dir" ] && dir='.'
+      [ "$dir" != "/" ] && dir="${dir/%\//}"
+      matches=$(eval "$compgen $(printf %q "$dir")" | FZF_DEFAULT_OPTS="--height ${FZF_TMUX_HEIGHT:-40%} --reverse $FZF_DEFAULT_OPTS $FZF_COMPLETION_OPTS" __fzf_comprun "$cmd" ${(Q)${(Z+n+)fzf_opts}} -q "$leftover" | while read item; do
+        echo -n "${(q)item}$suffix "
+      done)
+      matches=${matches% }
+      if [ -n "$matches" ]; then
+        LBUFFER="$lbuf$matches$tail"
+      fi
+      zle reset-prompt
+      break
+    fi
+    dir=$(dirname "$dir")
+    dir=${dir%/}/
+  done
+}
+
+_fzf_path_completion() {
+  __fzf_generic_path_completion "$1" "$2" _fzf_compgen_path \
+    "-m" "" " "
+}
+
+_fzf_dir_completion() {
+  __fzf_generic_path_completion "$1" "$2" _fzf_compgen_dir \
+    "" "/" ""
+}
+
+_fzf_feed_fifo() (
+  command rm -f "$1"
+  mkfifo "$1"
+  cat <&0 > "$1" &
+)
+
+_fzf_complete() {
+  setopt localoptions ksh_arrays
+  # Split arguments around --
+  local args rest str_arg i sep
+  args=("$@")
+  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-$$"
+  lbuf=${rest[0]}
+  cmd=$(__fzf_extract_command "$lbuf")
+  post="${funcstack[1]}_post"
+  type $post > /dev/null 2>&1 || post=cat
+
+  _fzf_feed_fifo "$fifo"
+  matches=$(FZF_DEFAULT_OPTS="--height ${FZF_TMUX_HEIGHT:-40%} --reverse $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 reset-prompt
+  command rm -f "$fifo"
+}
+
+_fzf_complete_telnet() {
+  _fzf_complete +m -- "$@" < <(
+    command grep -v '^\s*\(#\|$\)' /etc/hosts | command grep -Fv '0.0.0.0' |
+        awk '{if (length($2) > 0) {print $2}}' | sort -u
+  )
+}
+
+_fzf_complete_ssh() {
+  _fzf_complete +m -- "$@" < <(
+    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 | tr ',' '\n' | tr -d '[' | awk '{ print $1 " " $1 }') \
+        <(command grep -v '^\s*\(#\|$\)' /etc/hosts | command grep -Fv '0.0.0.0') |
+        awk '{if (length($2) > 0) {print $2}}' | sort -u
+  )
+}
+
+_fzf_complete_export() {
+  _fzf_complete -m -- "$@" < <(
+    declare -xp | sed 's/=.*//' | sed 's/.* //'
+  )
+}
+
+_fzf_complete_unset() {
+  _fzf_complete -m -- "$@" < <(
+    declare -xp | sed 's/=.*//' | sed 's/.* //'
+  )
+}
+
+_fzf_complete_unalias() {
+  _fzf_complete +m -- "$@" < <(
+    alias | sed 's/=.*//'
+  )
+}
+
+_fzf_complete_kill() {
+  _fzf_complete -m --preview 'echo {}' --preview-window down:3:wrap --min-height 15 -- "$@" < <(
+    command ps -ef | sed 1d
+  )
+}
+
+_fzf_complete_kill_post() {
+  awk '{print $2}'
+}
+
+fzf-completion() {
+  local tokens cmd prefix trigger tail matches lbuf d_cmds
+  setopt localoptions noshwordsplit noksh_arrays noposixbuiltins
+
+  # http://zsh.sourceforge.net/FAQ/zshfaq03.html
+  # http://zsh.sourceforge.net/Doc/Release/Expansion.html#Parameter-Expansion-Flags
+  tokens=(${(z)LBUFFER})
+  if [ ${#tokens} -lt 1 ]; then
+    zle ${fzf_default_completion:-expand-or-complete}
+    return
+  fi
+
+  cmd=$(__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 ${LBUFFER[-1]} = ' ' ]; then
+    tail=$trigger
+    tokens+=$trigger
+    lbuf="$lbuf$trigger"
+  fi
+
+  # Trigger sequence given
+  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}}
+    [ -n "${tokens[-1]}" ] && lbuf=${lbuf:0:-${#tokens[-1]}}
+
+    if eval "type _fzf_complete_${cmd} > /dev/null"; then
+      prefix="$prefix" eval _fzf_complete_${cmd} ${(q)lbuf}
+    elif [ ${d_cmds[(i)$cmd]} -le ${#d_cmds} ]; then
+      _fzf_dir_completion "$prefix" "$lbuf"
+    else
+      _fzf_path_completion "$prefix" "$lbuf"
+    fi
+  # Fall back to default completion
+  else
+    zle ${fzf_default_completion:-expand-or-complete}
+  fi
+}
+
+[ -z "$fzf_default_completion" ] && {
+  binding=$(bindkey '^I')
+  [[ $binding =~ 'undefined-key' ]] || fzf_default_completion=$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

@@ -0,0 +1,96 @@
+#     ____      ____
+#    / __/___  / __/
+#   / /_/_  / / /_
+#  / __/ / /_/ __/
+# /_/   /___/_/ key-bindings.bash
+#
+# - $FZF_TMUX_OPTS
+# - $FZF_CTRL_T_COMMAND
+# - $FZF_CTRL_T_OPTS
+# - $FZF_CTRL_R_OPTS
+# - $FZF_ALT_C_COMMAND
+# - $FZF_ALT_C_OPTS
+
+# Key bindings
+# ------------
+__fzf_select__() {
+  local cmd="${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 | cut -b3-"}"
+  eval "$cmd" | FZF_DEFAULT_OPTS="--height ${FZF_TMUX_HEIGHT:-40%} --reverse $FZF_DEFAULT_OPTS $FZF_CTRL_T_OPTS" $(__fzfcmd) -m "$@" | while read -r item; do
+    printf '%q ' "$item"
+  done
+  echo
+}
+
+if [[ $- =~ i ]]; then
+
+__fzfcmd() {
+  [ -n "$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() {
+  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 . -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-"}"
+  dir=$(eval "$cmd" | FZF_DEFAULT_OPTS="--height ${FZF_TMUX_HEIGHT:-40%} --reverse $FZF_DEFAULT_OPTS $FZF_ALT_C_OPTS" $(__fzfcmd) +m) && printf 'cd %q' "$dir"
+}
+
+__fzf_history__() {
+  local output
+  output=$(
+    builtin fc -lnr -2147483648 |
+      last_hist=$(HISTTIMEFORMAT='' builtin history 1) perl -n -l0 -e 'BEGIN { getc; $/ = "\n\t"; $HISTCMD = $ENV{last_hist} + 1 } s/^[ *]//; print $HISTCMD - $. . "\t$_" if !$seen{$_}++' |
+      FZF_DEFAULT_OPTS="--height ${FZF_TMUX_HEIGHT:-40%} $FZF_DEFAULT_OPTS -n2..,.. --tiebreak=index --bind=ctrl-r:toggle-sort $FZF_CTRL_R_OPTS +m --read0" $(__fzfcmd) --query "$READLINE_LINE"
+  ) || return
+  READLINE_LINE=${output#*$'\t'}
+  if [ -z "$READLINE_POINT" ]; then
+    echo "$READLINE_LINE"
+  else
+    READLINE_POINT=0x7fffffff
+  fi
+}
+
+# Required to refresh the prompt after fzf
+bind -m emacs-standard '"\er": redraw-current-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 [ "${BASH_VERSINFO[0]}" -lt 4 ]; then
+  # CTRL-T - Paste the selected file path into the command line
+  bind -m emacs-standard '"\C-t": " \C-b\C-k \C-u`__fzf_select__`\e\C-e\er\C-a\C-y\C-h\C-e\e \C-y\ey\C-x\C-x\C-f"'
+  bind -m vi-command '"\C-t": "\C-z\C-t\C-z"'
+  bind -m vi-insert '"\C-t": "\C-z\C-t\C-z"'
+
+  # CTRL-R - Paste the selected command from history into the command line
+  bind -m emacs-standard '"\C-r": "\C-e \C-u\C-y\ey\C-u"$(__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
+  # CTRL-T - Paste the selected file path into the command line
+  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 -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
+
+# 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"'
+
+fi

shell/key-bindings.fish

@@ -0,0 +1,161 @@
+#     ____      ____
+#    / __/___  / __/
+#   / /_/_  / / /_
+#  / __/ / /_/ __/
+# /_/   /___/_/ 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
+
+# Key bindings
+# ------------
+function fzf_key_bindings
+
+  # 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]
+
+    # "-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 $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 -- (string escape $i)
+      commandline -it -- ' '
+    end
+    commandline -f repaint
+  end
+
+  function fzf-history-widget -d "Show command history"
+    test -n "$FZF_TMUX_HEIGHT"; or set FZF_TMUX_HEIGHT 40%
+    begin
+      set -lx FZF_DEFAULT_OPTS "--height $FZF_TMUX_HEIGHT $FZF_DEFAULT_OPTS --tiebreak=index --bind=ctrl-r:toggle-sort $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
+  end
+
+  function fzf-cd-widget -d "Change directory"
+    set -l commandline (__fzf_parse_commandline)
+    set -l dir $commandline[1]
+    set -l fzf_query $commandline[2]
+
+    test -n "$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 $FZF_DEFAULT_OPTS $FZF_ALT_C_OPTS"
+      eval "$FZF_ALT_C_COMMAND | "(__fzfcmd)' +m --query "'$fzf_query'"' | read -l result
+
+      if [ -n "$result" ]
+        cd $result
+
+        # Remove last token from commandline.
+        commandline -t ""
+      end
+    end
+
+    commandline -f repaint
+  end
+
+  function __fzfcmd
+    test -n "$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
+  end
+
+  bind \ct fzf-file-widget
+  bind \cr fzf-history-widget
+  bind \ec fzf-cd-widget
+
+  if bind -M insert > /dev/null 2>&1
+    bind -M insert \ct fzf-file-widget
+    bind -M insert \cr fzf-history-widget
+    bind -M insert \ec fzf-cd-widget
+  end
+
+  function __fzf_parse_commandline -d 'Parse the current command line token and return split of existing filepath and rest of token'
+    # eval is used to do shell expansion on paths
+    set -l commandline (eval "printf '%s' "(commandline -t))
+
+    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
+  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

@@ -0,0 +1,127 @@
+#     ____      ____
+#    / __/___  / __/
+#   / /_/_  / / /_
+#  / __/ / /_/ __/
+# /_/   /___/_/ 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
+
+# Key bindings
+# ------------
+
+# 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 $__fzf_opt"
+      fi
+    done
+  }
+fi
+
+'emulate' 'zsh' '-o' 'no_aliases'
+
+{
+
+[[ -o interactive ]] || return 0
+
+# CTRL-T - Paste the selected file path(s) into the command line
+__fsel() {
+  local cmd="${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 | cut -b3-"}"
+  setopt localoptions pipefail no_aliases 2> /dev/null
+  eval "$cmd" | FZF_DEFAULT_OPTS="--height ${FZF_TMUX_HEIGHT:-40%} --reverse $FZF_DEFAULT_OPTS $FZF_CTRL_T_OPTS" $(__fzfcmd) -m "$@" | while read item; do
+    echo -n "${(q)item} "
+  done
+  local ret=$?
+  echo
+  return $ret
+}
+
+__fzfcmd() {
+  [ -n "$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)"
+  local ret=$?
+  zle reset-prompt
+  return $ret
+}
+zle     -N   fzf-file-widget
+bindkey '^T' fzf-file-widget
+
+# Ensure precmds are run after cd
+fzf-redraw-prompt() {
+  local precmd
+  for precmd in $precmd_functions; do
+    $precmd
+  done
+  zle reset-prompt
+}
+zle -N fzf-redraw-prompt
+
+# ALT-C - cd into the selected directory
+fzf-cd-widget() {
+  local cmd="${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 $FZF_DEFAULT_OPTS $FZF_ALT_C_OPTS" $(__fzfcmd) +m)"
+  if [[ -z "$dir" ]]; then
+    zle redisplay
+    return 0
+  fi
+  if [ -z "$BUFFER" ]; then
+    BUFFER="cd ${(q)dir}"
+    zle accept-line
+  else
+    print -sr "cd ${(q)dir}"
+    cd "$dir"
+  fi
+  local ret=$?
+  unset dir # ensure this doesn't end up appearing in prompt expansion
+  zle fzf-redraw-prompt
+  return $ret
+}
+zle     -N    fzf-cd-widget
+bindkey '\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 noposixbuiltins pipefail no_aliases 2> /dev/null
+  selected=( $(fc -rl 1 | perl -ne 'print if !$seen{(/^\s*[0-9]+\**\s+(.*)/, $1)}++' |
+    FZF_DEFAULT_OPTS="--height ${FZF_TMUX_HEIGHT:-40%} $FZF_DEFAULT_OPTS -n2..,.. --tiebreak=index --bind=ctrl-r:toggle-sort $FZF_CTRL_R_OPTS --query=${(qqq)LBUFFER} +m" $(__fzfcmd)) )
+  local ret=$?
+  if [ -n "$selected" ]; then
+    num=$selected[1]
+    if [ -n "$num" ]; then
+      zle vi-fetch-history -n $num
+    fi
+  fi
+  zle reset-prompt
+  return $ret
+}
+zle     -N   fzf-history-widget
+bindkey '^R' fzf-history-widget
+
+} always {
+  eval $__fzf_key_bindings_options
+  'unset' '__fzf_key_bindings_options'
+}

src/LICENSE

@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2013-2020 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.

src/algo/algo.go

@@ -0,0 +1,884 @@
+package algo
+
+/*
+
+Algorithm
+---------
+
+FuzzyMatchV1 finds the first "fuzzy" occurrence of the pattern within the given
+text in O(n) time where n is the length of the text. Once the position of the
+last character is located, it traverses backwards to see if there's a shorter
+substring that matches the pattern.
+
+    a_____b___abc__  To find "abc"
+    *-----*-----*>   1. Forward scan
+             <***    2. Backward scan
+
+The algorithm is simple and fast, but as it only sees the first occurrence,
+it is not guaranteed to find the occurrence with the highest score.
+
+    a_____b__c__abc
+    *-----*--*  ***
+
+FuzzyMatchV2 implements a modified version of Smith-Waterman algorithm to find
+the optimal solution (highest score) according to the scoring criteria. Unlike
+the original algorithm, omission or mismatch of a character in the pattern is
+not allowed.
+
+Performance
+-----------
+
+The new V2 algorithm is slower than V1 as it examines all occurrences of the
+pattern instead of stopping immediately after finding the first one. The time
+complexity of the algorithm is O(nm) if a match is found and O(n) otherwise
+where n is the length of the item and m is the length of the pattern. Thus, the
+performance overhead may not be noticeable for a query with high selectivity.
+However, if the performance is more important than the quality of the result,
+you can still choose v1 algorithm with --algo=v1.
+
+Scoring criteria
+----------------
+
+- We prefer matches at special positions, such as the start of a word, or
+  uppercase character in camelCase words.
+
+- That is, we prefer an occurrence of the pattern with more characters
+  matching at special positions, even if the total match length is longer.
+    e.g. "fuzzyfinder" vs. "fuzzy-finder" on "ff"
+                            ````````````
+- Also, if the first character in the pattern appears at one of the special
+  positions, the bonus point for the position is multiplied by a constant
+  as it is extremely likely that the first character in the typed pattern
+  has more significance than the rest.
+    e.g. "fo-bar" vs. "foob-r" on "br"
+          ``````
+- But since fzf is still a fuzzy finder, not an acronym finder, we should also
+  consider the total length of the matched substring. This is why we have the
+  gap penalty. The gap penalty increases as the length of the gap (distance
+  between the matching characters) increases, so the effect of the bonus is
+  eventually cancelled at some point.
+    e.g. "fuzzyfinder" vs. "fuzzy-blurry-finder" on "ff"
+          ```````````
+- Consequently, it is crucial to find the right balance between the bonus
+  and the gap penalty. The parameters were chosen that the bonus is cancelled
+  when the gap size increases beyond 8 characters.
+
+- The bonus mechanism can have the undesirable side effect where consecutive
+  matches are ranked lower than the ones with gaps.
+    e.g. "foobar" vs. "foo-bar" on "foob"
+                       ```````
+- To correct this anomaly, we also give extra bonus point to each character
+  in a consecutive matching chunk.
+    e.g. "foobar" vs. "foo-bar" on "foob"
+          ``````
+- The amount of consecutive bonus is primarily determined by the bonus of the
+  first character in the chunk.
+    e.g. "foobar" vs. "out-of-bound" on "oob"
+                       ````````````
+*/
+
+import (
+	"bytes"
+	"fmt"
+	"strings"
+	"unicode"
+	"unicode/utf8"
+
+	"github.com/junegunn/fzf/src/util"
+)
+
+var DEBUG bool
+
+func indexAt(index int, max int, forward bool) int {
+	if forward {
+		return index
+	}
+	return max - index - 1
+}
+
+// Result contains the results of running a match function.
+type Result struct {
+	// TODO int32 should suffice
+	Start int
+	End   int
+	Score int
+}
+
+const (
+	scoreMatch        = 16
+	scoreGapStart     = -3
+	scoreGapExtention = -1
+
+	// We prefer matches at the beginning of a word, but the bonus should not be
+	// too great to prevent the longer acronym matches from always winning over
+	// shorter fuzzy matches. The bonus point here was specifically chosen that
+	// the bonus is cancelled when the gap between the acronyms grows over
+	// 8 characters, which is approximately the average length of the words found
+	// in web2 dictionary and my file system.
+	bonusBoundary = scoreMatch / 2
+
+	// Although bonus point for non-word characters is non-contextual, we need it
+	// for computing bonus points for consecutive chunks starting with a non-word
+	// character.
+	bonusNonWord = scoreMatch / 2
+
+	// Edge-triggered bonus for matches in camelCase words.
+	// Compared to word-boundary case, they don't accompany single-character gaps
+	// (e.g. FooBar vs. foo-bar), so we deduct bonus point accordingly.
+	bonusCamel123 = bonusBoundary + scoreGapExtention
+
+	// Minimum bonus point given to characters in consecutive chunks.
+	// Note that bonus points for consecutive matches shouldn't have needed if we
+	// used fixed match score as in the original algorithm.
+	bonusConsecutive = -(scoreGapStart + scoreGapExtention)
+
+	// The first character in the typed pattern usually has more significance
+	// than the rest so it's important that it appears at special positions where
+	// bonus points are given. e.g. "to-go" vs. "ongoing" on "og" or on "ogo".
+	// The amount of the extra bonus should be limited so that the gap penalty is
+	// still respected.
+	bonusFirstCharMultiplier = 2
+)
+
+type charClass int
+
+const (
+	charNonWord charClass = iota
+	charLower
+	charUpper
+	charLetter
+	charNumber
+)
+
+func posArray(withPos bool, len int) *[]int {
+	if withPos {
+		pos := make([]int, 0, len)
+		return &pos
+	}
+	return nil
+}
+
+func alloc16(offset int, slab *util.Slab, size int) (int, []int16) {
+	if slab != nil && cap(slab.I16) > offset+size {
+		slice := slab.I16[offset : offset+size]
+		return offset + size, slice
+	}
+	return offset, make([]int16, size)
+}
+
+func alloc32(offset int, slab *util.Slab, size int) (int, []int32) {
+	if slab != nil && cap(slab.I32) > offset+size {
+		slice := slab.I32[offset : offset+size]
+		return offset + size, slice
+	}
+	return offset, make([]int32, size)
+}
+
+func charClassOfAscii(char rune) charClass {
+	if char >= 'a' && char <= 'z' {
+		return charLower
+	} else if char >= 'A' && char <= 'Z' {
+		return charUpper
+	} else if char >= '0' && char <= '9' {
+		return charNumber
+	}
+	return charNonWord
+}
+
+func charClassOfNonAscii(char rune) charClass {
+	if unicode.IsLower(char) {
+		return charLower
+	} else if unicode.IsUpper(char) {
+		return charUpper
+	} else if unicode.IsNumber(char) {
+		return charNumber
+	} else if unicode.IsLetter(char) {
+		return charLetter
+	}
+	return charNonWord
+}
+
+func charClassOf(char rune) charClass {
+	if char <= unicode.MaxASCII {
+		return charClassOfAscii(char)
+	}
+	return charClassOfNonAscii(char)
+}
+
+func bonusFor(prevClass charClass, class charClass) int16 {
+	if prevClass == charNonWord && class != charNonWord {
+		// Word boundary
+		return bonusBoundary
+	} else if prevClass == charLower && class == charUpper ||
+		prevClass != charNumber && class == charNumber {
+		// camelCase letter123
+		return bonusCamel123
+	} else if class == charNonWord {
+		return bonusNonWord
+	}
+	return 0
+}
+
+func bonusAt(input *util.Chars, idx int) int16 {
+	if idx == 0 {
+		return bonusBoundary
+	}
+	return bonusFor(charClassOf(input.Get(idx-1)), charClassOf(input.Get(idx)))
+}
+
+func normalizeRune(r rune) rune {
+	if r < 0x00C0 || r > 0x2184 {
+		return r
+	}
+
+	n := normalized[r]
+	if n > 0 {
+		return n
+	}
+	return r
+}
+
+// Algo functions make two assumptions
+// 1. "pattern" is given in lowercase if "caseSensitive" is false
+// 2. "pattern" is already normalized if "normalize" is true
+type Algo func(caseSensitive bool, normalize bool, forward bool, input *util.Chars, pattern []rune, withPos bool, slab *util.Slab) (Result, *[]int)
+
+func trySkip(input *util.Chars, caseSensitive bool, b byte, from int) int {
+	byteArray := input.Bytes()[from:]
+	idx := bytes.IndexByte(byteArray, b)
+	if idx == 0 {
+		// Can't skip any further
+		return from
+	}
+	// We may need to search for the uppercase letter again. We don't have to
+	// consider normalization as we can be sure that this is an ASCII string.
+	if !caseSensitive && b >= 'a' && b <= 'z' {
+		if idx > 0 {
+			byteArray = byteArray[:idx]
+		}
+		uidx := bytes.IndexByte(byteArray, b-32)
+		if uidx >= 0 {
+			idx = uidx
+		}
+	}
+	if idx < 0 {
+		return -1
+	}
+	return from + idx
+}
+
+func isAscii(runes []rune) bool {
+	for _, r := range runes {
+		if r >= utf8.RuneSelf {
+			return false
+		}
+	}
+	return true
+}
+
+func asciiFuzzyIndex(input *util.Chars, pattern []rune, caseSensitive bool) int {
+	// Can't determine
+	if !input.IsBytes() {
+		return 0
+	}
+
+	// Not possible
+	if !isAscii(pattern) {
+		return -1
+	}
+
+	firstIdx, idx := 0, 0
+	for pidx := 0; pidx < len(pattern); pidx++ {
+		idx = trySkip(input, caseSensitive, byte(pattern[pidx]), idx)
+		if idx < 0 {
+			return -1
+		}
+		if pidx == 0 && idx > 0 {
+			// Step back to find the right bonus point
+			firstIdx = idx - 1
+		}
+		idx++
+	}
+	return firstIdx
+}
+
+func debugV2(T []rune, pattern []rune, F []int32, lastIdx int, H []int16, C []int16) {
+	width := lastIdx - int(F[0]) + 1
+
+	for i, f := range F {
+		I := i * width
+		if i == 0 {
+			fmt.Print("  ")
+			for j := int(f); j <= lastIdx; j++ {
+				fmt.Printf(" " + string(T[j]) + " ")
+			}
+			fmt.Println()
+		}
+		fmt.Print(string(pattern[i]) + " ")
+		for idx := int(F[0]); idx < int(f); idx++ {
+			fmt.Print(" 0 ")
+		}
+		for idx := int(f); idx <= lastIdx; idx++ {
+			fmt.Printf("%2d ", H[i*width+idx-int(F[0])])
+		}
+		fmt.Println()
+
+		fmt.Print("  ")
+		for idx, p := range C[I : I+width] {
+			if idx+int(F[0]) < int(F[i]) {
+				p = 0
+			}
+			if p > 0 {
+				fmt.Printf("%2d ", p)
+			} else {
+				fmt.Print("   ")
+			}
+		}
+		fmt.Println()
+	}
+}
+
+func FuzzyMatchV2(caseSensitive bool, normalize bool, forward bool, input *util.Chars, pattern []rune, withPos bool, slab *util.Slab) (Result, *[]int) {
+	// Assume that pattern is given in lowercase if case-insensitive.
+	// First check if there's a match and calculate bonus for each position.
+	// If the input string is too long, consider finding the matching chars in
+	// this phase as well (non-optimal alignment).
+	M := len(pattern)
+	if M == 0 {
+		return Result{0, 0, 0}, posArray(withPos, M)
+	}
+	N := input.Length()
+
+	// Since O(nm) algorithm can be prohibitively expensive for large input,
+	// we fall back to the greedy algorithm.
+	if slab != nil && N*M > cap(slab.I16) {
+		return FuzzyMatchV1(caseSensitive, normalize, forward, input, pattern, withPos, slab)
+	}
+
+	// Phase 1. Optimized search for ASCII string
+	idx := asciiFuzzyIndex(input, pattern, caseSensitive)
+	if idx < 0 {
+		return Result{-1, -1, 0}, nil
+	}
+
+	// Reuse pre-allocated integer slice to avoid unnecessary sweeping of garbages
+	offset16 := 0
+	offset32 := 0
+	offset16, H0 := alloc16(offset16, slab, N)
+	offset16, C0 := alloc16(offset16, slab, N)
+	// Bonus point for each position
+	offset16, B := alloc16(offset16, slab, N)
+	// The first occurrence of each character in the pattern
+	offset32, F := alloc32(offset32, slab, M)
+	// Rune array
+	_, T := alloc32(offset32, slab, N)
+	input.CopyRunes(T)
+
+	// Phase 2. Calculate bonus for each point
+	maxScore, maxScorePos := int16(0), 0
+	pidx, lastIdx := 0, 0
+	pchar0, pchar, prevH0, prevClass, inGap := pattern[0], pattern[0], int16(0), charNonWord, false
+	Tsub := T[idx:]
+	H0sub, C0sub, Bsub := H0[idx:][:len(Tsub)], C0[idx:][:len(Tsub)], B[idx:][:len(Tsub)]
+	for off, char := range Tsub {
+		var class charClass
+		if char <= unicode.MaxASCII {
+			class = charClassOfAscii(char)
+			if !caseSensitive && class == charUpper {
+				char += 32
+			}
+		} else {
+			class = charClassOfNonAscii(char)
+			if !caseSensitive && class == charUpper {
+				char = unicode.To(unicode.LowerCase, char)
+			}
+			if normalize {
+				char = normalizeRune(char)
+			}
+		}
+
+		Tsub[off] = char
+		bonus := bonusFor(prevClass, class)
+		Bsub[off] = bonus
+		prevClass = class
+
+		if char == pchar {
+			if pidx < M {
+				F[pidx] = int32(idx + off)
+				pidx++
+				pchar = pattern[util.Min(pidx, M-1)]
+			}
+			lastIdx = idx + off
+		}
+
+		if char == pchar0 {
+			score := scoreMatch + bonus*bonusFirstCharMultiplier
+			H0sub[off] = score
+			C0sub[off] = 1
+			if M == 1 && (forward && score > maxScore || !forward && score >= maxScore) {
+				maxScore, maxScorePos = score, idx+off
+				if forward && bonus == bonusBoundary {
+					break
+				}
+			}
+			inGap = false
+		} else {
+			if inGap {
+				H0sub[off] = util.Max16(prevH0+scoreGapExtention, 0)
+			} else {
+				H0sub[off] = util.Max16(prevH0+scoreGapStart, 0)
+			}
+			C0sub[off] = 0
+			inGap = true
+		}
+		prevH0 = H0sub[off]
+	}
+	if pidx != M {
+		return Result{-1, -1, 0}, nil
+	}
+	if M == 1 {
+		result := Result{maxScorePos, maxScorePos + 1, int(maxScore)}
+		if !withPos {
+			return result, nil
+		}
+		pos := []int{maxScorePos}
+		return result, &pos
+	}
+
+	// Phase 3. Fill in score matrix (H)
+	// Unlike the original algorithm, we do not allow omission.
+	f0 := int(F[0])
+	width := lastIdx - f0 + 1
+	offset16, H := alloc16(offset16, slab, width*M)
+	copy(H, H0[f0:lastIdx+1])
+
+	// Possible length of consecutive chunk at each position.
+	_, C := alloc16(offset16, slab, width*M)
+	copy(C, C0[f0:lastIdx+1])
+
+	Fsub := F[1:]
+	Psub := pattern[1:][:len(Fsub)]
+	for off, f := range Fsub {
+		f := int(f)
+		pchar := Psub[off]
+		pidx := off + 1
+		row := pidx * width
+		inGap := false
+		Tsub := T[f : lastIdx+1]
+		Bsub := B[f:][:len(Tsub)]
+		Csub := C[row+f-f0:][:len(Tsub)]
+		Cdiag := C[row+f-f0-1-width:][:len(Tsub)]
+		Hsub := H[row+f-f0:][:len(Tsub)]
+		Hdiag := H[row+f-f0-1-width:][:len(Tsub)]
+		Hleft := H[row+f-f0-1:][:len(Tsub)]
+		Hleft[0] = 0
+		for off, char := range Tsub {
+			col := off + f
+			var s1, s2, consecutive int16
+
+			if inGap {
+				s2 = Hleft[off] + scoreGapExtention
+			} else {
+				s2 = Hleft[off] + scoreGapStart
+			}
+
+			if pchar == char {
+				s1 = Hdiag[off] + scoreMatch
+				b := Bsub[off]
+				consecutive = Cdiag[off] + 1
+				// Break consecutive chunk
+				if b == bonusBoundary {
+					consecutive = 1
+				} else if consecutive > 1 {
+					b = util.Max16(b, util.Max16(bonusConsecutive, B[col-int(consecutive)+1]))
+				}
+				if s1+b < s2 {
+					s1 += Bsub[off]
+					consecutive = 0
+				} else {
+					s1 += b
+				}
+			}
+			Csub[off] = consecutive
+
+			inGap = s1 < s2
+			score := util.Max16(util.Max16(s1, s2), 0)
+			if pidx == M-1 && (forward && score > maxScore || !forward && score >= maxScore) {
+				maxScore, maxScorePos = score, col
+			}
+			Hsub[off] = score
+		}
+	}
+
+	if DEBUG {
+		debugV2(T, pattern, F, lastIdx, H, C)
+	}
+
+	// Phase 4. (Optional) Backtrace to find character positions
+	pos := posArray(withPos, M)
+	j := f0
+	if withPos {
+		i := M - 1
+		j = maxScorePos
+		preferMatch := true
+		for {
+			I := i * width
+			j0 := j - f0
+			s := H[I+j0]
+
+			var s1, s2 int16
+			if i > 0 && j >= int(F[i]) {
+				s1 = H[I-width+j0-1]
+			}
+			if j > int(F[i]) {
+				s2 = H[I+j0-1]
+			}
+
+			if s > s1 && (s > s2 || s == s2 && preferMatch) {
+				*pos = append(*pos, j)
+				if i == 0 {
+					break
+				}
+				i--
+			}
+			preferMatch = C[I+j0] > 1 || I+width+j0+1 < len(C) && C[I+width+j0+1] > 0
+			j--
+		}
+	}
+	// Start offset we return here is only relevant when begin tiebreak is used.
+	// However finding the accurate offset requires backtracking, and we don't
+	// want to pay extra cost for the option that has lost its importance.
+	return Result{j, maxScorePos + 1, int(maxScore)}, pos
+}
+
+// Implement the same sorting criteria as V2
+func calculateScore(caseSensitive bool, normalize bool, text *util.Chars, pattern []rune, sidx int, eidx int, withPos bool) (int, *[]int) {
+	pidx, score, inGap, consecutive, firstBonus := 0, 0, false, 0, int16(0)
+	pos := posArray(withPos, len(pattern))
+	prevClass := charNonWord
+	if sidx > 0 {
+		prevClass = charClassOf(text.Get(sidx - 1))
+	}
+	for idx := sidx; idx < eidx; idx++ {
+		char := text.Get(idx)
+		class := charClassOf(char)
+		if !caseSensitive {
+			if char >= 'A' && char <= 'Z' {
+				char += 32
+			} else if char > unicode.MaxASCII {
+				char = unicode.To(unicode.LowerCase, char)
+			}
+		}
+		// pattern is already normalized
+		if normalize {
+			char = normalizeRune(char)
+		}
+		if char == pattern[pidx] {
+			if withPos {
+				*pos = append(*pos, idx)
+			}
+			score += scoreMatch
+			bonus := bonusFor(prevClass, class)
+			if consecutive == 0 {
+				firstBonus = bonus
+			} else {
+				// Break consecutive chunk
+				if bonus == bonusBoundary {
+					firstBonus = bonus
+				}
+				bonus = util.Max16(util.Max16(bonus, firstBonus), bonusConsecutive)
+			}
+			if pidx == 0 {
+				score += int(bonus * bonusFirstCharMultiplier)
+			} else {
+				score += int(bonus)
+			}
+			inGap = false
+			consecutive++
+			pidx++
+		} else {
+			if inGap {
+				score += scoreGapExtention
+			} else {
+				score += scoreGapStart
+			}
+			inGap = true
+			consecutive = 0
+			firstBonus = 0
+		}
+		prevClass = class
+	}
+	return score, pos
+}
+
+// FuzzyMatchV1 performs fuzzy-match
+func FuzzyMatchV1(caseSensitive bool, normalize bool, forward bool, text *util.Chars, pattern []rune, withPos bool, slab *util.Slab) (Result, *[]int) {
+	if len(pattern) == 0 {
+		return Result{0, 0, 0}, nil
+	}
+	if asciiFuzzyIndex(text, pattern, caseSensitive) < 0 {
+		return Result{-1, -1, 0}, nil
+	}
+
+	pidx := 0
+	sidx := -1
+	eidx := -1
+
+	lenRunes := text.Length()
+	lenPattern := len(pattern)
+
+	for index := 0; index < lenRunes; index++ {
+		char := text.Get(indexAt(index, lenRunes, forward))
+		// This is considerably faster than blindly applying strings.ToLower to the
+		// whole string
+		if !caseSensitive {
+			// Partially inlining `unicode.ToLower`. Ugly, but makes a noticeable
+			// difference in CPU cost. (Measured on Go 1.4.1. Also note that the Go
+			// compiler as of now does not inline non-leaf functions.)
+			if char >= 'A' && char <= 'Z' {
+				char += 32
+			} else if char > unicode.MaxASCII {
+				char = unicode.To(unicode.LowerCase, char)
+			}
+		}
+		if normalize {
+			char = normalizeRune(char)
+		}
+		pchar := pattern[indexAt(pidx, lenPattern, forward)]
+		if char == pchar {
+			if sidx < 0 {
+				sidx = index
+			}
+			if pidx++; pidx == lenPattern {
+				eidx = index + 1
+				break
+			}
+		}
+	}
+
+	if sidx >= 0 && eidx >= 0 {
+		pidx--
+		for index := eidx - 1; index >= sidx; index-- {
+			tidx := indexAt(index, lenRunes, forward)
+			char := text.Get(tidx)
+			if !caseSensitive {
+				if char >= 'A' && char <= 'Z' {
+					char += 32
+				} else if char > unicode.MaxASCII {
+					char = unicode.To(unicode.LowerCase, char)
+				}
+			}
+
+			pidx_ := indexAt(pidx, lenPattern, forward)
+			pchar := pattern[pidx_]
+			if char == pchar {
+				if pidx--; pidx < 0 {
+					sidx = index
+					break
+				}
+			}
+		}
+
+		if !forward {
+			sidx, eidx = lenRunes-eidx, lenRunes-sidx
+		}
+
+		score, pos := calculateScore(caseSensitive, normalize, text, pattern, sidx, eidx, withPos)
+		return Result{sidx, eidx, score}, pos
+	}
+	return Result{-1, -1, 0}, nil
+}
+
+// ExactMatchNaive is a basic string searching algorithm that handles case
+// sensitivity. Although naive, it still performs better than the combination
+// of strings.ToLower + strings.Index for typical fzf use cases where input
+// strings and patterns are not very long.
+//
+// Since 0.15.0, this function searches for the match with the highest
+// bonus point, instead of stopping immediately after finding the first match.
+// The solution is much cheaper since there is only one possible alignment of
+// the pattern.
+func ExactMatchNaive(caseSensitive bool, normalize bool, forward bool, text *util.Chars, pattern []rune, withPos bool, slab *util.Slab) (Result, *[]int) {
+	if len(pattern) == 0 {
+		return Result{0, 0, 0}, nil
+	}
+
+	lenRunes := text.Length()
+	lenPattern := len(pattern)
+
+	if lenRunes < lenPattern {
+		return Result{-1, -1, 0}, nil
+	}
+
+	if asciiFuzzyIndex(text, pattern, caseSensitive) < 0 {
+		return Result{-1, -1, 0}, nil
+	}
+
+	// For simplicity, only look at the bonus at the first character position
+	pidx := 0
+	bestPos, bonus, bestBonus := -1, int16(0), int16(-1)
+	for index := 0; index < lenRunes; index++ {
+		index_ := indexAt(index, lenRunes, forward)
+		char := text.Get(index_)
+		if !caseSensitive {
+			if char >= 'A' && char <= 'Z' {
+				char += 32
+			} else if char > unicode.MaxASCII {
+				char = unicode.To(unicode.LowerCase, char)
+			}
+		}
+		if normalize {
+			char = normalizeRune(char)
+		}
+		pidx_ := indexAt(pidx, lenPattern, forward)
+		pchar := pattern[pidx_]
+		if pchar == char {
+			if pidx_ == 0 {
+				bonus = bonusAt(text, index_)
+			}
+			pidx++
+			if pidx == lenPattern {
+				if bonus > bestBonus {
+					bestPos, bestBonus = index, bonus
+				}
+				if bonus == bonusBoundary {
+					break
+				}
+				index -= pidx - 1
+				pidx, bonus = 0, 0
+			}
+		} else {
+			index -= pidx
+			pidx, bonus = 0, 0
+		}
+	}
+	if bestPos >= 0 {
+		var sidx, eidx int
+		if forward {
+			sidx = bestPos - lenPattern + 1
+			eidx = bestPos + 1
+		} else {
+			sidx = lenRunes - (bestPos + 1)
+			eidx = lenRunes - (bestPos - lenPattern + 1)
+		}
+		score, _ := calculateScore(caseSensitive, normalize, text, pattern, sidx, eidx, false)
+		return Result{sidx, eidx, score}, nil
+	}
+	return Result{-1, -1, 0}, nil
+}
+
+// PrefixMatch performs prefix-match
+func PrefixMatch(caseSensitive bool, normalize bool, forward bool, text *util.Chars, pattern []rune, withPos bool, slab *util.Slab) (Result, *[]int) {
+	if len(pattern) == 0 {
+		return Result{0, 0, 0}, nil
+	}
+
+	trimmedLen := 0
+	if !unicode.IsSpace(pattern[0]) {
+		trimmedLen = text.LeadingWhitespaces()
+	}
+
+	if text.Length()-trimmedLen < len(pattern) {
+		return Result{-1, -1, 0}, nil
+	}
+
+	for index, r := range pattern {
+		char := text.Get(trimmedLen + index)
+		if !caseSensitive {
+			char = unicode.ToLower(char)
+		}
+		if normalize {
+			char = normalizeRune(char)
+		}
+		if char != r {
+			return Result{-1, -1, 0}, nil
+		}
+	}
+	lenPattern := len(pattern)
+	score, _ := calculateScore(caseSensitive, normalize, text, pattern, trimmedLen, trimmedLen+lenPattern, false)
+	return Result{trimmedLen, trimmedLen + lenPattern, score}, nil
+}
+
+// SuffixMatch performs suffix-match
+func SuffixMatch(caseSensitive bool, normalize bool, forward bool, text *util.Chars, pattern []rune, withPos bool, slab *util.Slab) (Result, *[]int) {
+	lenRunes := text.Length()
+	trimmedLen := lenRunes
+	if len(pattern) == 0 || !unicode.IsSpace(pattern[len(pattern)-1]) {
+		trimmedLen -= text.TrailingWhitespaces()
+	}
+	if len(pattern) == 0 {
+		return Result{trimmedLen, trimmedLen, 0}, nil
+	}
+	diff := trimmedLen - len(pattern)
+	if diff < 0 {
+		return Result{-1, -1, 0}, nil
+	}
+
+	for index, r := range pattern {
+		char := text.Get(index + diff)
+		if !caseSensitive {
+			char = unicode.ToLower(char)
+		}
+		if normalize {
+			char = normalizeRune(char)
+		}
+		if char != r {
+			return Result{-1, -1, 0}, nil
+		}
+	}
+	lenPattern := len(pattern)
+	sidx := trimmedLen - lenPattern
+	eidx := trimmedLen
+	score, _ := calculateScore(caseSensitive, normalize, text, pattern, sidx, eidx, false)
+	return Result{sidx, eidx, score}, nil
+}
+
+// EqualMatch performs equal-match
+func EqualMatch(caseSensitive bool, normalize bool, forward bool, text *util.Chars, pattern []rune, withPos bool, slab *util.Slab) (Result, *[]int) {
+	lenPattern := len(pattern)
+	if lenPattern == 0 {
+		return Result{-1, -1, 0}, nil
+	}
+
+	// Strip leading whitespaces
+	trimmedLen := 0
+	if !unicode.IsSpace(pattern[0]) {
+		trimmedLen = text.LeadingWhitespaces()
+	}
+
+	// Strip trailing whitespaces
+	trimmedEndLen := 0
+	if !unicode.IsSpace(pattern[lenPattern-1]) {
+		trimmedEndLen = text.TrailingWhitespaces()
+	}
+
+	if text.Length()-trimmedLen-trimmedEndLen != lenPattern {
+		return Result{-1, -1, 0}, nil
+	}
+	match := true
+	if normalize {
+		runes := text.ToRunes()
+		for idx, pchar := range pattern {
+			char := runes[trimmedLen+idx]
+			if !caseSensitive {
+				char = unicode.To(unicode.LowerCase, char)
+			}
+			if normalizeRune(pchar) != normalizeRune(char) {
+				match = false
+				break
+			}
+		}
+	} else {
+		runes := text.ToRunes()
+		runesStr := string(runes[trimmedLen : len(runes)-trimmedEndLen])
+		if !caseSensitive {
+			runesStr = strings.ToLower(runesStr)
+		}
+		match = runesStr == string(pattern)
+	}
+	if match {
+		return Result{trimmedLen, trimmedLen + lenPattern, (scoreMatch+bonusBoundary)*lenPattern +
+			(bonusFirstCharMultiplier-1)*bonusBoundary}, nil
+	}
+	return Result{-1, -1, 0}, nil
+}

src/algo/algo_test.go

@@ -0,0 +1,197 @@
+package algo
+
+import (
+	"math"
+	"sort"
+	"strings"
+	"testing"
+
+	"github.com/junegunn/fzf/src/util"
+)
+
+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)
+	}
+	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 start != sidx {
+		t.Errorf("Invalid start index: %d (expected: %d, %s / %s)", start, sidx, 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) {
+	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+scoreGapExtention*3)
+			assertMatch(t, fn, false, forward, "foo bar baz", "fbb", 0, 9,
+				scoreMatch*3+bonusBoundary*bonusFirstCharMultiplier+
+					bonusBoundary*2+2*scoreGapStart+4*scoreGapExtention)
+			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+bonusBoundary*bonusFirstCharMultiplier+bonusBoundary*3)
+			assertMatch(t, fn, false, forward, "/.oh-my-zsh/cache", "zshc", 8, 13,
+				scoreMatch*4+bonusBoundary*bonusFirstCharMultiplier+bonusBoundary*3+scoreGapStart)
+			assertMatch(t, fn, false, forward, "ab0123 456", "12356", 3, 10,
+				scoreMatch*5+bonusConsecutive*3+scoreGapStart+scoreGapExtention)
+			assertMatch(t, fn, false, forward, "abc123 456", "12356", 3, 10,
+				scoreMatch*5+bonusCamel123*bonusFirstCharMultiplier+bonusCamel123*2+bonusConsecutive+scoreGapStart+scoreGapExtention)
+			assertMatch(t, fn, false, forward, "foo/bar/baz", "fbb", 0, 9,
+				scoreMatch*3+bonusBoundary*bonusFirstCharMultiplier+
+					bonusBoundary*2+2*scoreGapStart+4*scoreGapExtention)
+			assertMatch(t, fn, false, forward, "fooBarBaz", "fbb", 0, 7,
+				scoreMatch*3+bonusBoundary*bonusFirstCharMultiplier+
+					bonusCamel123*2+2*scoreGapStart+2*scoreGapExtention)
+			assertMatch(t, fn, false, forward, "foo barbaz", "fbb", 0, 8,
+				scoreMatch*3+bonusBoundary*bonusFirstCharMultiplier+bonusBoundary+
+					scoreGapStart*2+scoreGapExtention*3)
+			assertMatch(t, fn, false, forward, "fooBar Baz", "foob", 0, 4,
+				scoreMatch*4+bonusBoundary*bonusFirstCharMultiplier+bonusBoundary*3)
+			assertMatch(t, fn, false, forward, "xFoo-Bar Baz", "foo-b", 1, 6,
+				scoreMatch*5+bonusCamel123*bonusFirstCharMultiplier+bonusCamel123*2+
+					bonusNonWord+bonusBoundary)
+
+			assertMatch(t, fn, true, forward, "fooBarbaz", "oBz", 2, 9,
+				scoreMatch*3+bonusCamel123+scoreGapStart+scoreGapExtention*3)
+			assertMatch(t, fn, true, forward, "Foo/Bar/Baz", "FBB", 0, 9,
+				scoreMatch*3+bonusBoundary*(bonusFirstCharMultiplier+2)+
+					scoreGapStart*2+scoreGapExtention*4)
+			assertMatch(t, fn, true, forward, "FooBarBaz", "FBB", 0, 7,
+				scoreMatch*3+bonusBoundary*bonusFirstCharMultiplier+bonusCamel123*2+
+					scoreGapStart*2+scoreGapExtention*2)
+			assertMatch(t, fn, true, forward, "FooBar Baz", "FooB", 0, 4,
+				scoreMatch*4+bonusBoundary*bonusFirstCharMultiplier+bonusBoundary*2+
+					util.Max(bonusCamel123, bonusBoundary))
+
+			// 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, FuzzyMatchV1, false, true, "foobar fb", "fb", 0, 4,
+		scoreMatch*2+bonusBoundary*bonusFirstCharMultiplier+
+			scoreGapStart+scoreGapExtention)
+	assertMatch(t, FuzzyMatchV1, false, false, "foobar fb", "fb", 7, 9,
+		scoreMatch*2+bonusBoundary*bonusFirstCharMultiplier+bonusBoundary)
+}
+
+func TestExactMatchNaive(t *testing.T) {
+	for _, dir := range []bool{true, false} {
+		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, "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+bonusBoundary*(bonusFirstCharMultiplier+3))
+		assertMatch(t, ExactMatchNaive, false, dir, "/.oh-my-zsh/cache", "zsh/c", 8, 13,
+			scoreMatch*5+bonusBoundary*(bonusFirstCharMultiplier+4))
+	}
+}
+
+func TestExactMatchNaiveBackward(t *testing.T) {
+	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+bonusBoundary)*3 + bonusBoundary*(bonusFirstCharMultiplier-1)
+
+	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, 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, 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+bonusNonWord)
+	}
+}
+
+func TestEmptyPattern(t *testing.T) {
+	for _, dir := range []bool{true, false} {
+		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, 56, FuzzyMatchV1, FuzzyMatchV2, PrefixMatch, ExactMatchNaive)
+	test("Só Danço Samba", "sodc", 0, 7, 89, FuzzyMatchV1, FuzzyMatchV2)
+	test("Danço", "danco", 0, 5, 128, 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

@@ -0,0 +1,292 @@
+package fzf
+
+import (
+	"bytes"
+	"regexp"
+	"strconv"
+	"strings"
+	"unicode/utf8"
+
+	"github.com/junegunn/fzf/src/tui"
+)
+
+type ansiOffset struct {
+	offset [2]int32
+	color  ansiState
+}
+
+type ansiState struct {
+	fg   tui.Color
+	bg   tui.Color
+	attr tui.Attr
+}
+
+func (s *ansiState) colored() bool {
+	return s.fg != -1 || s.bg != -1 || s.attr > 0
+}
+
+func (s *ansiState) equals(t *ansiState) bool {
+	if t == nil {
+		return !s.colored()
+	}
+	return s.fg == t.fg && s.bg == t.bg && s.attr == t.attr
+}
+
+func (s *ansiState) ToString() string {
+	if !s.colored() {
+		return ""
+	}
+
+	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;"
+	}
+	ret += toAnsiString(s.fg, 30) + toAnsiString(s.bg, 40)
+
+	return "\x1b[" + strings.TrimSuffix(ret, ";") + "m"
+}
+
+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 + ";"
+}
+
+var ansiRegex *regexp.Regexp
+
+func init() {
+	/*
+		References:
+		- https://github.com/gnachman/iTerm2
+		- http://ascii-table.com/ansi-escape-sequences.php
+		- 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
+	*/
+	// The following regular expression will include not all but most of the
+	// frequently used ANSI sequences
+	ansiRegex = regexp.MustCompile("(?:\x1b[\\[()][0-9;]*[a-zA-Z@]|\x1b][0-9];[[:print:]]+(?:\x1b\\\\|\x07)|\x1b.|[\x0e\x0f]|.\x08)")
+}
+
+func findAnsiStart(str string) int {
+	idx := 0
+	for ; idx < len(str); idx++ {
+		b := str[idx]
+		if b == 0x1b || b == 0x0e || b == 0x0f {
+			return idx
+		}
+		if b == 0x08 && idx > 0 {
+			return idx - 1
+		}
+	}
+	return idx
+}
+
+func extractColor(str string, state *ansiState, proc func(string, *ansiState) bool) (string, *[]ansiOffset, *ansiState) {
+	var offsets []ansiOffset
+	var output bytes.Buffer
+
+	if state != nil {
+		offsets = append(offsets, ansiOffset{[2]int32{0, 0}, *state})
+	}
+
+	prevIdx := 0
+	runeCount := 0
+	for idx := 0; idx < len(str); {
+		idx += findAnsiStart(str[idx:])
+		if idx == len(str) {
+			break
+		}
+
+		// Make sure that we found an ANSI code
+		offset := ansiRegex.FindStringIndex(str[idx:])
+		if len(offset) < 2 {
+			idx++
+			continue
+		}
+		offset[0] += idx
+		offset[1] += idx
+		idx = offset[1]
+
+		// Check if we should continue
+		prev := str[prevIdx:offset[0]]
+		if proc != nil && !proc(prev, state) {
+			return "", nil, nil
+		}
+
+		prevIdx = offset[1]
+		runeCount += utf8.RuneCountInString(prev)
+		output.WriteString(prev)
+
+		newState := interpretCode(str[offset[0]:offset[1]], state)
+		if !newState.equals(state) {
+			if state != nil {
+				// Update last offset
+				(&offsets[len(offsets)-1]).offset[1] = int32(runeCount)
+			}
+
+			if newState.colored() {
+				// Append new offset
+				state = newState
+				offsets = append(offsets, ansiOffset{[2]int32{int32(runeCount), int32(runeCount)}, *state})
+			} else {
+				// Discard state
+				state = nil
+			}
+		}
+	}
+
+	var rest string
+	var trimmed string
+
+	if prevIdx == 0 {
+		// No ANSI code found
+		rest = str
+		trimmed = str
+	} else {
+		rest = str[prevIdx:]
+		output.WriteString(rest)
+		trimmed = output.String()
+	}
+	if len(rest) > 0 && state != nil {
+		// Update last offset
+		runeCount += utf8.RuneCountInString(rest)
+		(&offsets[len(offsets)-1]).offset[1] = int32(runeCount)
+	}
+	if proc != nil {
+		proc(rest, state)
+	}
+	if len(offsets) == 0 {
+		return trimmed, nil, state
+	}
+	return trimmed, &offsets, state
+}
+
+func interpretCode(ansiCode string, prevState *ansiState) *ansiState {
+	// State
+	var state *ansiState
+	if prevState == nil {
+		state = &ansiState{-1, -1, 0}
+	} else {
+		state = &ansiState{prevState.fg, prevState.bg, prevState.attr}
+	}
+	if ansiCode[0] != '\x1b' || ansiCode[1] != '[' || ansiCode[len(ansiCode)-1] != 'm' {
+		return state
+	}
+
+	ptr := &state.fg
+	state256 := 0
+
+	init := func() {
+		state.fg = -1
+		state.bg = -1
+		state.attr = 0
+		state256 = 0
+	}
+
+	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 {
+			switch state256 {
+			case 0:
+				switch num {
+				case 38:
+					ptr = &state.fg
+					state256++
+				case 48:
+					ptr = &state.bg
+					state256++
+				case 39:
+					state.fg = -1
+				case 49:
+					state.bg = -1
+				case 1:
+					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 23: // tput rmso
+					state.attr = state.attr &^ tui.Italic
+				case 24: // tput rmul
+					state.attr = state.attr &^ tui.Underline
+				case 0:
+					init()
+				default:
+					if num >= 30 && num <= 37 {
+						state.fg = tui.Color(num - 30)
+					} else if num >= 40 && num <= 47 {
+						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 = 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
+			}
+		}
+	}
+	if state256 > 0 {
+		*ptr = -1
+	}
+	return state
+}

src/ansi_test.go

@@ -0,0 +1,187 @@
+package fzf
+
+import (
+	"fmt"
+	"strings"
+	"testing"
+
+	"github.com/junegunn/fzf/src/tui"
+)
+
+func TestExtractColor(t *testing.T) {
+	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.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)) {
+		output, ansiOffsets, newState := extractColor(src, state, nil)
+		state = newState
+		if output != "hello world" {
+			t.Errorf("Invalid output: %s %v", output, []rune(output))
+		}
+		fmt.Println(src, ansiOffsets, clean)
+		assertion(ansiOffsets, state)
+	}
+
+	check(func(offsets *[]ansiOffset, state *ansiState) {
+		if offsets != nil {
+			t.Fail()
+		}
+	})
+
+	state = nil
+	src = "\x1b[0mhello world"
+	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 {
+			t.Fail()
+		}
+		assert((*offsets)[0], 0, 11, -1, -1, true)
+	})
+
+	state = nil
+	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)
+	})
+
+	state = nil
+	src = "\x1b[1mhello \x1b[Kworld"
+	check(func(offsets *[]ansiOffset, state *ansiState) {
+		if len(*offsets) != 1 {
+			t.Fail()
+		}
+		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 {
+			t.Fail()
+		}
+		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 {
+			t.Fail()
+		}
+		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 {
+			t.Fail()
+		}
+		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 {
+			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)
+	})
+
+	// {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 {
+			t.Fail()
+		}
+		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 {
+			t.Fail()
+		}
+		if state.fg != 2 || state.bg != -1 || state.attr == 0 {
+			t.Fail()
+		}
+		assert((*offsets)[0], 6, 11, 2, -1, true)
+	})
+
+	src = "hello world"
+	check(func(offsets *[]ansiOffset, state *ansiState) {
+		if len(*offsets) != 1 {
+			t.Fail()
+		}
+		if state.fg != 2 || state.bg != -1 || state.attr == 0 {
+			t.Fail()
+		}
+		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 {
+			t.Fail()
+		}
+		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)
+	})
+}
+
+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}, "")
+
+	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}, "\x1b[31;44m")
+	assert("\x1b[1;2;31m", &ansiState{fg: 2, bg: -1, attr: tui.Reverse}, "\x1b[1;2;7;31;49m")
+	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")
+}

src/cache.go

@@ -0,0 +1,81 @@
+package fzf
+
+import "sync"
+
+// queryCache associates strings to lists of items
+type queryCache map[string][]Result
+
+// ChunkCache associates Chunk and query string to lists of items
+type ChunkCache struct {
+	mutex sync.Mutex
+	cache map[*Chunk]*queryCache
+}
+
+// NewChunkCache returns a new ChunkCache
+func NewChunkCache() ChunkCache {
+	return ChunkCache{sync.Mutex{}, make(map[*Chunk]*queryCache)}
+}
+
+// Add adds the list to the cache
+func (cc *ChunkCache) Add(chunk *Chunk, key string, list []Result) {
+	if len(key) == 0 || !chunk.IsFull() || len(list) > queryCacheMax {
+		return
+	}
+
+	cc.mutex.Lock()
+	defer cc.mutex.Unlock()
+
+	qc, ok := cc.cache[chunk]
+	if !ok {
+		cc.cache[chunk] = &queryCache{}
+		qc = cc.cache[chunk]
+	}
+	(*qc)[key] = list
+}
+
+// Lookup is called to lookup ChunkCache
+func (cc *ChunkCache) Lookup(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 {
+		list, ok := (*qc)[key]
+		if ok {
+			return list
+		}
+	}
+	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

@@ -0,0 +1,39 @@
+package fzf
+
+import "testing"
+
+func TestChunkCache(t *testing.T) {
+	cache := NewChunkCache()
+	chunk1p := &Chunk{}
+	chunk2p := &Chunk{count: chunkSize}
+	items1 := []Result{Result{}}
+	items2 := []Result{Result{}, Result{}}
+	cache.Add(chunk1p, "foo", items1)
+	cache.Add(chunk2p, "foo", items1)
+	cache.Add(chunk2p, "bar", items2)
+
+	{ // chunk1 is not full
+		cached := cache.Lookup(chunk1p, "foo")
+		if cached != nil {
+			t.Error("Cached disabled for non-empty chunks", cached)
+		}
+	}
+	{
+		cached := cache.Lookup(chunk2p, "foo")
+		if cached == nil || len(cached) != 1 {
+			t.Error("Expected 1 item cached", cached)
+		}
+	}
+	{
+		cached := cache.Lookup(chunk2p, "bar")
+		if cached == nil || len(cached) != 2 {
+			t.Error("Expected 2 items cached", cached)
+		}
+	}
+	{
+		cached := cache.Lookup(chunk1p, "foobar")
+		if cached != nil {
+			t.Error("Expected 0 item cached", cached)
+		}
+	}
+}

src/chunklist.go

@@ -0,0 +1,89 @@
+package fzf
+
+import "sync"
+
+// 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 byte array
+type ItemBuilder func(*Item, []byte) bool
+
+// ChunkList is a list of Chunks
+type ChunkList struct {
+	chunks []*Chunk
+	mutex  sync.Mutex
+	trans  ItemBuilder
+}
+
+// NewChunkList returns a new ChunkList
+func NewChunkList(trans ItemBuilder) *ChunkList {
+	return &ChunkList{
+		chunks: []*Chunk{},
+		mutex:  sync.Mutex{},
+		trans:  trans}
+}
+
+func (c *Chunk) push(trans ItemBuilder, data []byte) bool {
+	if trans(&c.items[c.count], data) {
+		c.count++
+		return true
+	}
+	return false
+}
+
+// IsFull returns true if the Chunk is full
+func (c *Chunk) IsFull() bool {
+	return c.count == chunkSize
+}
+
+func (cl *ChunkList) lastChunk() *Chunk {
+	return cl.chunks[len(cl.chunks)-1]
+}
+
+// CountItems returns the total number of Items
+func CountItems(cs []*Chunk) int {
+	if len(cs) == 0 {
+		return 0
+	}
+	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()
+
+	if len(cl.chunks) == 0 || cl.lastChunk().IsFull() {
+		cl.chunks = append(cl.chunks, &Chunk{})
+	}
+
+	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()
+
+	ret := make([]*Chunk, len(cl.chunks))
+	copy(ret, cl.chunks)
+
+	// Duplicate the last chunk
+	if cnt := len(ret); cnt > 0 {
+		newChunk := *ret[cnt-1]
+		ret[cnt-1] = &newChunk
+	}
+
+	cl.mutex.Unlock()
+	return ret, CountItems(ret)
+}

src/chunklist_test.go

@@ -0,0 +1,80 @@
+package fzf
+
+import (
+	"fmt"
+	"testing"
+
+	"github.com/junegunn/fzf/src/util"
+)
+
+func TestChunkList(t *testing.T) {
+	// FIXME global
+	sortCriteria = []criterion{byScore, byLength}
+
+	cl := NewChunkList(func(item *Item, s []byte) bool {
+		item.text = util.ToChars(s)
+		return true
+	})
+
+	// Snapshot
+	snapshot, count := cl.Snapshot()
+	if len(snapshot) > 0 || count > 0 {
+		t.Error("Snapshot should be empty now")
+	}
+
+	// Add some data
+	cl.Push([]byte("hello"))
+	cl.Push([]byte("world"))
+
+	// Previously created snapshot should remain the same
+	if len(snapshot) > 0 {
+		t.Error("Snapshot should not have changed")
+	}
+
+	// But the new snapshot should contain the added items
+	snapshot, count = cl.Snapshot()
+	if len(snapshot) != 1 && count != 2 {
+		t.Error("Snapshot should not be empty now")
+	}
+
+	// Check the content of the ChunkList
+	chunk1 := snapshot[0]
+	if chunk1.count != 2 {
+		t.Error("Snapshot should contain only two items")
+	}
+	if chunk1.items[0].text.ToString() != "hello" ||
+		chunk1.items[1].text.ToString() != "world" {
+		t.Error("Invalid data")
+	}
+	if chunk1.IsFull() {
+		t.Error("Chunk should not have been marked full yet")
+	}
+
+	// Add more data
+	for i := 0; i < chunkSize*2; i++ {
+		cl.Push([]byte(fmt.Sprintf("item %d", i)))
+	}
+
+	// Previous snapshot should remain the same
+	if len(snapshot) != 1 {
+		t.Error("Snapshot should stay the same")
+	}
+
+	// New snapshot
+	snapshot, count = cl.Snapshot()
+	if len(snapshot) != 3 || !snapshot[0].IsFull() ||
+		!snapshot[1].IsFull() || snapshot[2].IsFull() || count != chunkSize*2+2 {
+		t.Error("Expected two full chunks and one more chunk")
+	}
+	if snapshot[2].count != 2 {
+		t.Error("Unexpected number of items")
+	}
+
+	cl.Push([]byte("hello"))
+	cl.Push([]byte("world"))
+
+	lastChunkCount := snapshot[len(snapshot)-1].count
+	if lastChunkCount != 2 {
+		t.Error("Unexpected number of items:", lastChunkCount)
+	}
+}

src/constants.go

@@ -0,0 +1,84 @@
+package fzf
+
+import (
+	"math"
+	"os"
+	"time"
+
+	"github.com/junegunn/fzf/src/util"
+)
+
+const (
+	// Core
+	coordinatorDelayMax  time.Duration = 100 * time.Millisecond
+	coordinatorDelayStep time.Duration = 10 * time.Millisecond
+
+	// Reader
+	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   = 100 * time.Millisecond
+	previewCancelWait = 500 * time.Millisecond
+	previewChunkDelay = 100 * time.Millisecond
+	previewDelayed    = 500 * time.Millisecond
+	maxPatternLength  = 300
+	maxMulti          = math.MaxInt32
+
+	// Matcher
+	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
+
+	// Not to cache mergers with large lists
+	mergerCacheMax int = 100000
+
+	// History
+	defaultHistoryMax int = 1000
+
+	// Jump labels
+	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
+	EvtReadFin
+	EvtSearchNew
+	EvtSearchProgress
+	EvtSearchFin
+	EvtHeader
+	EvtReady
+)
+
+const (
+	exitCancel    = -1
+	exitOk        = 0
+	exitNoMatch   = 1
+	exitError     = 2
+	exitInterrupt = 130
+)

src/core.go

@@ -0,0 +1,344 @@
+/*
+Package fzf implements fzf, a command-line fuzzy finder.
+
+The MIT License (MIT)
+
+Copyright (c) 2017 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
+
+import (
+	"fmt"
+	"os"
+	"time"
+
+	"github.com/junegunn/fzf/src/util"
+)
+
+/*
+Reader   -> EvtReadFin
+Reader   -> EvtReadNew        -> Matcher  (restart)
+Terminal -> EvtSearchNew:bool -> Matcher  (restart)
+Matcher  -> EvtSearchProgress -> Terminal (update info)
+Matcher  -> EvtSearchFin      -> Terminal (update list)
+Matcher  -> EvtHeader         -> Terminal (update header)
+*/
+
+// Run starts fzf
+func Run(opts *Options, version string, revision string) {
+	sort := opts.Sort > 0
+	sortCriteria = opts.Criteria
+
+	if opts.Version {
+		if len(revision) > 0 {
+			fmt.Printf("%s (%s)\n", version, revision)
+		} else {
+			fmt.Println(version)
+		}
+		os.Exit(exitOk)
+	}
+
+	// Event channel
+	eventBox := util.NewEventBox()
+
+	// ANSI code processor
+	ansiProcessor := func(data []byte) (util.Chars, *[]ansiOffset) {
+		return util.ToChars(data), nil
+	}
+
+	var lineAnsiState, prevLineAnsiState *ansiState
+	if opts.Ansi {
+		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) (util.Chars, *[]ansiOffset) {
+				trimmed, _, _ := extractColor(string(data), nil, nil)
+				return util.ToChars([]byte(trimmed)), nil
+			}
+		}
+	}
+
+	// Chunk list
+	var chunkList *ChunkList
+	var itemIndex int32
+	header := make([]string, 0, opts.HeaderLines)
+	if len(opts.WithNth) == 0 {
+		chunkList = NewChunkList(func(item *Item, data []byte) bool {
+			if len(header) < opts.HeaderLines {
+				header = append(header, string(data))
+				eventBox.Set(EvtHeader, header)
+				return false
+			}
+			item.text, item.colors = ansiProcessor(data)
+			item.text.Index = itemIndex
+			itemIndex++
+			return true
+		})
+	} else {
+		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")
+					}
+				}
+			}
+			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 = NewReader(func(data []byte) bool {
+			return chunkList.Push(data)
+		}, eventBox, opts.ReadZero, opts.Filter == nil)
+		go reader.ReadSource()
+	}
+
+	// Matcher
+	forward := true
+	for _, cri := range opts.Criteria[1:] {
+		if cri == byEnd {
+			forward = false
+			break
+		}
+		if cri == byBegin {
+			break
+		}
+	}
+	patternBuilder := func(runes []rune) *Pattern {
+		return BuildPattern(
+			opts.Fuzzy, opts.FuzzyAlgo, opts.Extended, opts.Case, opts.Normalize, forward,
+			opts.Filter == nil, opts.Nth, opts.Delimiter, runes)
+	}
+	matcher := NewMatcher(patternBuilder, sort, opts.Tac, eventBox)
+
+	// Filtering mode
+	if opts.Filter != nil {
+		if opts.PrintQuery {
+			opts.Printer(*opts.Filter)
+		}
+
+		pattern := patternBuilder([]rune(*opts.Filter))
+		matcher.sort = pattern.sortable
+
+		found := false
+		if streamingFilter {
+			slab := util.MakeSlab(slab16Size, slab32Size)
+			reader := NewReader(
+				func(runes []byte) bool {
+					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, false)
+			reader.ReadSource()
+		} else {
+			eventBox.Unwatch(EvtReadNew)
+			eventBox.WaitFor(EvtReadFin)
+
+			snapshot, _ := chunkList.Snapshot()
+			merger, _ := matcher.scan(MatchRequest{
+				chunks:  snapshot,
+				pattern: pattern})
+			for i := 0; i < merger.Length(); i++ {
+				opts.Printer(merger.Get(i).item.AsString(opts.Ansi))
+				found = true
+			}
+		}
+		if found {
+			os.Exit(exitOk)
+		}
+		os.Exit(exitNoMatch)
+	}
+
+	// Synchronous search
+	if opts.Sync {
+		eventBox.Unwatch(EvtReadNew)
+		eventBox.WaitFor(EvtReadFin)
+	}
+
+	// Go interactive
+	go matcher.Loop()
+
+	// Terminal I/O
+	terminal := NewTerminal(opts, eventBox)
+	deferred := opts.Select1 || opts.Exit0
+	go terminal.Loop()
+	if !deferred {
+		terminal.startChan <- true
+	}
+
+	// Event coordination
+	reading := true
+	clearCache := util.Once(false)
+	clearSelection := util.Once(false)
+	ticks := 0
+	var nextCommand *string
+	restart := func(command string) {
+		reading = true
+		clearCache = util.Once(true)
+		clearSelection = util.Once(true)
+		chunkList.Clear()
+		header = make([]string, 0, opts.HeaderLines)
+		go reader.restart(command)
+	}
+	eventBox.Watch(EvtReadNew)
+	for {
+		delay := true
+		ticks++
+		input := func() []rune {
+			if opts.Phony {
+				return []rune{}
+			}
+			return []rune(terminal.Input())
+		}
+		eventBox.Wait(func(events *util.Events) {
+			if _, fin := (*events)[EvtReadFin]; fin {
+				delete(*events, EvtReadNew)
+			}
+			for evt, value := range *events {
+				switch evt {
+
+				case EvtReadNew, EvtReadFin:
+					if evt == EvtReadFin && nextCommand != nil {
+						restart(*nextCommand)
+						nextCommand = nil
+						break
+					} else {
+						reading = reading && evt == EvtReadNew
+					}
+					snapshot, count := chunkList.Snapshot()
+					terminal.UpdateCount(count, !reading, value.(*string))
+					if opts.Sync {
+						opts.Sync = false
+						terminal.UpdateList(PassMerger(&snapshot, opts.Tac), false)
+					}
+					matcher.Reset(snapshot, input(), false, !reading, sort, clearCache())
+
+				case EvtSearchNew:
+					var command *string
+					switch val := value.(type) {
+					case searchRequest:
+						sort = val.sort
+						command = val.command
+					}
+					if command != nil {
+						if reading {
+							reader.terminate()
+							nextCommand = command
+						} else {
+							restart(*command)
+						}
+						break
+					}
+					snapshot, _ := chunkList.Snapshot()
+					matcher.Reset(snapshot, input(), true, !reading, sort, clearCache())
+					delay = false
+
+				case EvtSearchProgress:
+					switch val := value.(type) {
+					case float32:
+						terminal.UpdateProgress(val)
+					}
+
+				case EvtHeader:
+					headerPadded := make([]string, opts.HeaderLines)
+					copy(headerPadded, value.([]string))
+					terminal.UpdateHeader(headerPadded)
+
+				case EvtSearchFin:
+					switch val := value.(type) {
+					case *Merger:
+						if deferred {
+							count := val.Length()
+							if opts.Select1 && count > 1 || opts.Exit0 && !opts.Select1 && count > 0 {
+								deferred = false
+								terminal.startChan <- true
+							} else if val.final {
+								if opts.Exit0 && count == 0 || opts.Select1 && count == 1 {
+									if opts.PrintQuery {
+										opts.Printer(opts.Query)
+									}
+									if len(opts.Expect) > 0 {
+										opts.Printer("")
+									}
+									for i := 0; i < count; i++ {
+										opts.Printer(val.Get(i).item.AsString(opts.Ansi))
+									}
+									if count > 0 {
+										os.Exit(exitOk)
+									}
+									os.Exit(exitNoMatch)
+								}
+								deferred = false
+								terminal.startChan <- true
+							}
+						}
+						terminal.UpdateList(val, clearSelection())
+					}
+				}
+			}
+			events.Clear()
+		})
+		if delay && reading {
+			dur := util.DurWithin(
+				time.Duration(ticks)*coordinatorDelayStep,
+				0, coordinatorDelayMax)
+			time.Sleep(dur)
+		}
+	}
+}

src/history.go

@@ -0,0 +1,96 @@
+package fzf
+
+import (
+	"errors"
+	"io/ioutil"
+	"os"
+	"strings"
+)
+
+// History struct represents input history
+type History struct {
+	path     string
+	lines    []string
+	modified map[int]string
+	maxSize  int
+	cursor   int
+}
+
+// NewHistory returns the pointer to a new History struct
+func NewHistory(path string, maxSize int) (*History, error) {
+	fmtError := func(e error) error {
+		if os.IsPermission(e) {
+			return errors.New("permission denied: " + path)
+		}
+		return errors.New("invalid history file: " + e.Error())
+	}
+
+	// Read history file
+	data, err := ioutil.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 {
+				return nil, fmtError(err)
+			}
+		} else {
+			return nil, fmtError(err)
+		}
+	}
+	// Split lines and limit the maximum number of lines
+	lines := strings.Split(strings.Trim(string(data), "\n"), "\n")
+	if len(lines[len(lines)-1]) > 0 {
+		lines = append(lines, "")
+	}
+	return &History{
+		path:     path,
+		maxSize:  maxSize,
+		lines:    lines,
+		modified: make(map[int]string),
+		cursor:   len(lines) - 1}, nil
+}
+
+func (h *History) append(line string) error {
+	// We don't append empty lines
+	if len(line) == 0 {
+		return nil
+	}
+
+	lines := append(h.lines[:len(h.lines)-1], line)
+	if len(lines) > h.maxSize {
+		lines = lines[len(lines)-h.maxSize:]
+	}
+	h.lines = append(lines, "")
+	return ioutil.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
+	if h.cursor == len(h.lines)-1 {
+		h.lines[h.cursor] = str
+	} else if h.cursor < len(h.lines)-1 {
+		h.modified[h.cursor] = str
+	}
+}
+
+func (h *History) current() string {
+	if str, prs := h.modified[h.cursor]; prs {
+		return str
+	}
+	return h.lines[h.cursor]
+}
+
+func (h *History) previous() string {
+	if h.cursor > 0 {
+		h.cursor--
+	}
+	return h.current()
+}
+
+func (h *History) next() string {
+	if h.cursor < len(h.lines)-1 {
+		h.cursor++
+	}
+	return h.current()
+}

src/history_test.go

@@ -0,0 +1,73 @@
+package fzf
+
+import (
+	"io/ioutil"
+	"os"
+	"os/user"
+	"runtime"
+	"testing"
+)
+
+func TestHistory(t *testing.T) {
+	maxHistory := 50
+
+	// Invalid arguments
+	user, _ := user.Current()
+	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"}
+		if user.Name != "root" {
+			paths = append(paths, "/etc/sudoers")
+		}
+	}
+
+	for _, path := range paths {
+		if _, e := NewHistory(path, maxHistory); e == nil {
+			t.Error("Error expected for: " + path)
+		}
+	}
+
+	f, _ := ioutil.TempFile("", "fzf-history")
+	f.Close()
+
+	{ // Append lines
+		h, _ := NewHistory(f.Name(), maxHistory)
+		for i := 0; i < maxHistory+10; i++ {
+			h.append("foobar")
+		}
+	}
+	{ // Read lines
+		h, _ := NewHistory(f.Name(), maxHistory)
+		if len(h.lines) != maxHistory+1 {
+			t.Errorf("Expected: %d, actual: %d\n", maxHistory+1, len(h.lines))
+		}
+		for i := 0; i < maxHistory; i++ {
+			if h.lines[i] != "foobar" {
+				t.Error("Expected: foobar, actual: " + h.lines[i])
+			}
+		}
+	}
+	{ // Append lines
+		h, _ := NewHistory(f.Name(), maxHistory)
+		h.append("barfoo")
+		h.append("")
+		h.append("foobarbaz")
+	}
+	{ // Read lines again
+		h, _ := NewHistory(f.Name(), maxHistory)
+		if len(h.lines) != maxHistory+1 {
+			t.Errorf("Expected: %d, actual: %d\n", maxHistory+1, len(h.lines))
+		}
+		compare := func(idx int, exp string) {
+			if h.lines[idx] != exp {
+				t.Errorf("Expected: %s, actual: %s\n", exp, h.lines[idx])
+			}
+		}
+		compare(maxHistory-3, "foobar")
+		compare(maxHistory-2, "barfoo")
+		compare(maxHistory-1, "foobarbaz")
+	}
+}

src/item.go

@@ -0,0 +1,44 @@
+package fzf
+
+import (
+	"github.com/junegunn/fzf/src/util"
+)
+
+// Item represents each input line. 56 bytes.
+type Item struct {
+	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.text.Index
+}
+
+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{}
+	}
+	return *item.colors
+}
+
+// AsString returns the original string
+func (item *Item) AsString(stripAnsi bool) string {
+	if item.origText != nil {
+		if stripAnsi {
+			trimmed, _, _ := extractColor(string(*item.origText), nil, nil)
+			return trimmed
+		}
+		return string(*item.origText)
+	}
+	return item.text.ToString()
+}

src/item_test.go

@@ -0,0 +1,23 @@
+package fzf
+
+import (
+	"testing"
+
+	"github.com/junegunn/fzf/src/util"
+)
+
+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()
+	}
+}

src/matcher.go

@@ -0,0 +1,235 @@
+package fzf
+
+import (
+	"fmt"
+	"runtime"
+	"sort"
+	"sync"
+	"time"
+
+	"github.com/junegunn/fzf/src/util"
+)
+
+// MatchRequest represents a search request
+type MatchRequest struct {
+	chunks     []*Chunk
+	pattern    *Pattern
+	final      bool
+	sort       bool
+	clearCache bool
+}
+
+// Matcher is responsible for performing search
+type Matcher struct {
+	patternBuilder func([]rune) *Pattern
+	sort           bool
+	tac            bool
+	eventBox       *util.EventBox
+	reqBox         *util.EventBox
+	partitions     int
+	slab           []*util.Slab
+	mergerCache    map[string]*Merger
+}
+
+const (
+	reqRetry util.EventType = iota
+	reqReset
+)
+
+// NewMatcher returns a new Matcher
+func NewMatcher(patternBuilder func([]rune) *Pattern,
+	sort bool, tac bool, eventBox *util.EventBox) *Matcher {
+	partitions := util.Min(numPartitionsMultiplier*runtime.NumCPU(), maxPartitions)
+	return &Matcher{
+		patternBuilder: patternBuilder,
+		sort:           sort,
+		tac:            tac,
+		eventBox:       eventBox,
+		reqBox:         util.NewEventBox(),
+		partitions:     partitions,
+		slab:           make([]*util.Slab, partitions),
+		mergerCache:    make(map[string]*Merger)}
+}
+
+// Loop puts Matcher in action
+func (m *Matcher) Loop() {
+	prevCount := 0
+
+	for {
+		var request MatchRequest
+
+		m.reqBox.Wait(func(events *util.Events) {
+			for _, val := range *events {
+				switch val := val.(type) {
+				case MatchRequest:
+					request = val
+				default:
+					panic(fmt.Sprintf("Unexpected type: %T", val))
+				}
+			}
+			events.Clear()
+		})
+
+		if request.sort != m.sort || request.clearCache {
+			m.sort = request.sort
+			m.mergerCache = make(map[string]*Merger)
+			clearChunkCache()
+		}
+
+		// Restart search
+		patternString := request.pattern.AsString()
+		var merger *Merger
+		cancelled := false
+		count := CountItems(request.chunks)
+
+		foundCache := false
+		if count == prevCount {
+			// Look up mergerCache
+			if cached, found := m.mergerCache[patternString]; found {
+				foundCache = true
+				merger = cached
+			}
+		} else {
+			// Invalidate mergerCache
+			prevCount = count
+			m.mergerCache = make(map[string]*Merger)
+		}
+
+		if !foundCache {
+			merger, cancelled = m.scan(request)
+		}
+
+		if !cancelled {
+			if merger.cacheable() {
+				m.mergerCache[patternString] = merger
+			}
+			merger.final = request.final
+			m.eventBox.Set(EvtSearchFin, merger)
+		}
+	}
+}
+
+func (m *Matcher) sliceChunks(chunks []*Chunk) [][]*Chunk {
+	partitions := m.partitions
+	perSlice := len(chunks) / partitions
+
+	if perSlice == 0 {
+		partitions = len(chunks)
+		perSlice = 1
+	}
+
+	slices := make([][]*Chunk, partitions)
+	for i := 0; i < partitions; i++ {
+		start := i * perSlice
+		end := start + perSlice
+		if i == partitions-1 {
+			end = len(chunks)
+		}
+		slices[i] = chunks[start:end]
+	}
+	return slices
+}
+
+type partialResult struct {
+	index   int
+	matches []Result
+}
+
+func (m *Matcher) scan(request MatchRequest) (*Merger, bool) {
+	startedAt := time.Now()
+
+	numChunks := len(request.chunks)
+	if numChunks == 0 {
+		return EmptyMerger, false
+	}
+	pattern := request.pattern
+	if pattern.IsEmpty() {
+		return PassMerger(&request.chunks, m.tac), false
+	}
+
+	cancelled := util.NewAtomicBool(false)
+
+	slices := m.sliceChunks(request.chunks)
+	numSlices := len(slices)
+	resultChan := make(chan partialResult, numSlices)
+	countChan := make(chan int, numChunks)
+	waitGroup := sync.WaitGroup{}
+
+	for idx, chunks := range slices {
+		waitGroup.Add(1)
+		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() }()
+			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))
+				} else {
+					sort.Sort(ByRelevance(sliceMatches))
+				}
+			}
+			resultChan <- partialResult{idx, sliceMatches}
+		}(idx, m.slab[idx], chunks)
+	}
+
+	wait := func() bool {
+		cancelled.Set(true)
+		waitGroup.Wait()
+		return true
+	}
+
+	count := 0
+	matchCount := 0
+	for matchesInChunk := range countChan {
+		count++
+		matchCount += matchesInChunk
+
+		if count == numChunks {
+			break
+		}
+
+		if m.reqBox.Peek(reqReset) {
+			return nil, wait()
+		}
+
+		if time.Since(startedAt) > progressMinDuration {
+			m.eventBox.Set(EvtSearchProgress, float32(count)/float32(numChunks))
+		}
+	}
+
+	partialResults := make([][]Result, numSlices)
+	for range slices {
+		partialResult := <-resultChan
+		partialResults[partialResult.index] = partialResult.matches
+	}
+	return NewMerger(pattern, partialResults, m.sort, m.tac), false
+}
+
+// Reset is called to interrupt/signal the ongoing search
+func (m *Matcher) Reset(chunks []*Chunk, patternRunes []rune, cancel bool, final bool, sort bool, clearCache bool) {
+	pattern := m.patternBuilder(patternRunes)
+
+	var event util.EventType
+	if cancel {
+		event = reqReset
+	} else {
+		event = reqRetry
+	}
+	m.reqBox.Set(event, MatchRequest{chunks, pattern, final, sort && pattern.sortable, clearCache})
+}

src/merger.go

@@ -0,0 +1,121 @@
+package fzf
+
+import "fmt"
+
+// EmptyMerger is a Merger with no data
+var EmptyMerger = NewMerger(nil, [][]Result{}, false, false)
+
+// Merger holds a set of locally sorted lists of items and provides the view of
+// a single, globally-sorted list
+type Merger struct {
+	pattern *Pattern
+	lists   [][]Result
+	merged  []Result
+	chunks  *[]*Chunk
+	cursors []int
+	sorted  bool
+	tac     bool
+	final   bool
+	count   int
+}
+
+// PassMerger returns a new Merger that simply returns the items in the
+// original order
+func PassMerger(chunks *[]*Chunk, tac bool) *Merger {
+	mg := Merger{
+		pattern: nil,
+		chunks:  chunks,
+		tac:     tac,
+		count:   0}
+
+	for _, chunk := range *mg.chunks {
+		mg.count += chunk.count
+	}
+	return &mg
+}
+
+// NewMerger returns a new Merger
+func NewMerger(pattern *Pattern, lists [][]Result, sorted bool, tac bool) *Merger {
+	mg := Merger{
+		pattern: pattern,
+		lists:   lists,
+		merged:  []Result{},
+		chunks:  nil,
+		cursors: make([]int, len(lists)),
+		sorted:  sorted,
+		tac:     tac,
+		final:   false,
+		count:   0}
+
+	for _, list := range mg.lists {
+		mg.count += len(list)
+	}
+	return &mg
+}
+
+// Length returns the number of items
+func (mg *Merger) Length() int {
+	return mg.count
+}
+
+// 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 Result{item: &chunk.items[idx%chunkSize]}
+	}
+
+	if mg.sorted {
+		return mg.mergedGet(idx)
+	}
+
+	if mg.tac {
+		idx = mg.count - idx - 1
+	}
+	for _, list := range mg.lists {
+		numItems := len(list)
+		if idx < numItems {
+			return list[idx]
+		}
+		idx -= numItems
+	}
+	panic(fmt.Sprintf("Index out of bounds (unsorted, %d/%d)", idx, mg.count))
+}
+
+func (mg *Merger) cacheable() bool {
+	return mg.count < mergerCacheMax
+}
+
+func (mg *Merger) mergedGet(idx int) Result {
+	for i := len(mg.merged); i <= idx; i++ {
+		minRank := minRank()
+		minIdx := -1
+		for listIdx, list := range mg.lists {
+			cursor := mg.cursors[listIdx]
+			if cursor < 0 || cursor == len(list) {
+				mg.cursors[listIdx] = -1
+				continue
+			}
+			if cursor >= 0 {
+				rank := list[cursor]
+				if minIdx < 0 || compareRanks(rank, minRank, mg.tac) {
+					minRank = rank
+					minIdx = listIdx
+				}
+			}
+			mg.cursors[listIdx] = cursor
+		}
+
+		if minIdx >= 0 {
+			chosen := mg.lists[minIdx]
+			mg.merged = append(mg.merged, chosen[mg.cursors[minIdx]])
+			mg.cursors[minIdx]++
+		} else {
+			panic(fmt.Sprintf("Index out of bounds (sorted, %d/%d)", i, mg.count))
+		}
+	}
+	return mg.merged[idx]
+}

src/merger_test.go

@@ -0,0 +1,88 @@
+package fzf
+
+import (
+	"fmt"
+	"math/rand"
+	"sort"
+	"testing"
+
+	"github.com/junegunn/fzf/src/util"
+)
+
+func assert(t *testing.T, cond bool, msg ...string) {
+	if !cond {
+		t.Error(msg)
+	}
+}
+
+func randResult() Result {
+	str := fmt.Sprintf("%d", rand.Uint32())
+	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")
+}
+
+func buildLists(partiallySorted bool) ([][]Result, []Result) {
+	numLists := 4
+	lists := make([][]Result, numLists)
+	cnt := 0
+	for i := 0; i < numLists; i++ {
+		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 := []Result{}
+	for _, list := range lists {
+		items = append(items, list...)
+	}
+	return lists, items
+}
+
+func TestMergerUnsorted(t *testing.T) {
+	lists, items := buildLists(false)
+	cnt := len(items)
+
+	// Not sorted: same order
+	mg := NewMerger(nil, lists, false, false)
+	assert(t, cnt == mg.Length(), "Invalid Length")
+	for i := 0; i < cnt; i++ {
+		assert(t, items[i] == mg.Get(i), "Invalid Get")
+	}
+}
+
+func TestMergerSorted(t *testing.T) {
+	lists, items := buildLists(true)
+	cnt := len(items)
+
+	// Sorted sorted order
+	mg := NewMerger(nil, lists, true, false)
+	assert(t, cnt == mg.Length(), "Invalid Length")
+	sort.Sort(ByRelevance(items))
+	for i := 0; i < cnt; i++ {
+		if items[i] != mg.Get(i) {
+			t.Error("Not sorted", items[i], mg.Get(i))
+		}
+	}
+
+	// Inverse order
+	mg2 := NewMerger(nil, lists, true, false)
+	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

@@ -0,0 +1,448 @@
+package fzf
+
+import (
+	"fmt"
+	"io/ioutil"
+	"testing"
+
+	"github.com/junegunn/fzf/src/tui"
+)
+
+func TestDelimiterRegex(t *testing.T) {
+	// Valid regex
+	delim := delimiterRegexp(".")
+	if delim.regex == nil || delim.str != nil {
+		t.Error(delim)
+	}
+	// Broken regex -> string
+	delim = delimiterRegexp("[0-9")
+	if delim.regex != nil || *delim.str != "[0-9" {
+		t.Error(delim)
+	}
+	// Valid regex
+	delim = delimiterRegexp("[0-9]")
+	if delim.regex.String() != "[0-9]" || delim.str != nil {
+		t.Error(delim)
+	}
+	// Tab character
+	delim = delimiterRegexp("\t")
+	if delim.regex != nil || *delim.str != "\t" {
+		t.Error(delim)
+	}
+	// Tab expression
+	delim = delimiterRegexp("\\t")
+	if delim.regex != nil || *delim.str != "\t" {
+		t.Error(delim)
+	}
+	// Tabs -> regex
+	delim = delimiterRegexp("\t+")
+	if delim.regex == nil || delim.str != nil {
+		t.Error(delim)
+	}
+}
+
+func TestDelimiterRegexString(t *testing.T) {
+	delim := delimiterRegexp("*")
+	tokens := Tokenize("-*--*---**---", delim)
+	if delim.regex != nil ||
+		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("-*--*---**---", delim)
+	if delim.str != nil ||
+		tokens[0].text.ToString() != "-*--*" ||
+		tokens[1].text.ToString() != "---*" ||
+		tokens[2].text.ToString() != "*---" {
+		t.Errorf("%s %d", tokens, len(tokens))
+	}
+}
+
+func TestSplitNth(t *testing.T) {
+	{
+		ranges := splitNth("..")
+		if len(ranges) != 1 ||
+			ranges[0].begin != rangeEllipsis ||
+			ranges[0].end != rangeEllipsis {
+			t.Errorf("%v", ranges)
+		}
+	}
+	{
+		ranges := splitNth("..3,1..,2..3,4..-1,-3..-2,..,2,-2,2..-2,1..-1")
+		if len(ranges) != 10 ||
+			ranges[0].begin != rangeEllipsis || ranges[0].end != 3 ||
+			ranges[1].begin != rangeEllipsis || ranges[1].end != rangeEllipsis ||
+			ranges[2].begin != 2 || ranges[2].end != 3 ||
+			ranges[3].begin != 4 || ranges[3].end != rangeEllipsis ||
+			ranges[4].begin != -3 || ranges[4].end != -2 ||
+			ranges[5].begin != rangeEllipsis || ranges[5].end != rangeEllipsis ||
+			ranges[6].begin != 2 || ranges[6].end != 2 ||
+			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("%v", ranges)
+		}
+	}
+}
+
+func TestIrrelevantNth(t *testing.T) {
+	{
+		opts := defaultOptions()
+		words := []string{"--nth", "..", "-x"}
+		parseOptions(opts, words)
+		postProcessOptions(opts)
+		if len(opts.Nth) != 0 {
+			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"}} {
+		{
+			opts := defaultOptions()
+			parseOptions(opts, words)
+			postProcessOptions(opts)
+			if len(opts.Nth) != 0 {
+				t.Errorf("nth should be empty: %v", opts.Nth)
+			}
+		}
+		{
+			opts := defaultOptions()
+			words = append(words, "-x")
+			parseOptions(opts, words)
+			postProcessOptions(opts)
+			if len(opts.Nth) != 2 {
+				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,ctrl-alt-a,ALT-enter,alt-SPACE", "")
+	check := func(i int, s string) {
+		if pairs[i] != s {
+			t.Errorf("%s != %s", pairs[i], s)
+		}
+	}
+	if len(pairs) != 12 {
+		t.Error(12)
+	}
+	check(tui.CtrlZ, "ctrl-z")
+	check(tui.AltZ, "alt-z")
+	check(tui.F2, "f2")
+	check(tui.AltZ+'@', "@")
+	check(tui.AltA, "Alt-a")
+	check(tui.AltZ+'!', "!")
+	check(tui.CtrlA+'g'-'a', "ctrl-G")
+	check(tui.AltZ+'J', "J")
+	check(tui.AltZ+'g', "g")
+	check(tui.CtrlAltA, "ctrl-alt-a")
+	check(tui.CtrlAltM, "ALT-enter")
+	check(tui.AltSpace, "alt-SPACE")
+
+	// Synonyms
+	pairs = parseKeyChords("enter,Return,space,tab,btab,esc,up,down,left,right", "")
+	if len(pairs) != 9 {
+		t.Error(9)
+	}
+	check(tui.CtrlM, "Return")
+	check(tui.AltZ+' ', "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(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) {
+	checkN := func(a int, b int) {
+		if a != b {
+			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)
+		}
+	}
+
+	pairs := parseKeyChords(",", "")
+	checkN(len(pairs), 1)
+	check(pairs, tui.AltZ+',', ",")
+
+	pairs = parseKeyChords(",,a,b", "")
+	checkN(len(pairs), 3)
+	check(pairs, tui.AltZ+'a', "a")
+	check(pairs, tui.AltZ+'b', "b")
+	check(pairs, tui.AltZ+',', ",")
+
+	pairs = parseKeyChords("a,b,,", "")
+	checkN(len(pairs), 3)
+	check(pairs, tui.AltZ+'a', "a")
+	check(pairs, tui.AltZ+'b', "b")
+	check(pairs, tui.AltZ+',', ",")
+
+	pairs = parseKeyChords("a,,,b", "")
+	checkN(len(pairs), 3)
+	check(pairs, tui.AltZ+'a', "a")
+	check(pairs, tui.AltZ+'b', "b")
+	check(pairs, tui.AltZ+',', ",")
+
+	pairs = parseKeyChords("a,,,b,c", "")
+	checkN(len(pairs), 4)
+	check(pairs, tui.AltZ+'a', "a")
+	check(pairs, tui.AltZ+'b', "b")
+	check(pairs, tui.AltZ+'c', "c")
+	check(pairs, tui.AltZ+',', ",")
+
+	pairs = parseKeyChords(",,,", "")
+	checkN(len(pairs), 1)
+	check(pairs, tui.AltZ+',', ",")
+}
+
+func TestBind(t *testing.T) {
+	keymap := defaultKeymap()
+	check := func(keyName int, arg1 string, types ...actionType) {
+		if len(keymap[keyName]) != len(types) {
+			t.Errorf("invalid number of actions (%d != %d)", len(types), len(keymap[keyName]))
+			return
+		}
+		for idx, action := range keymap[keyName] {
+			if types[idx] != action.t {
+				t.Errorf("invalid action type (%d != %d)", types[idx], action.t)
+			}
+		}
+		if len(arg1) > 0 && keymap[keyName][0].a != arg1 {
+			t.Errorf("invalid action argument: (%s != %s)", arg1, keymap[keyName][0].a)
+		}
+	}
+	check(tui.CtrlA, "", actBeginningOfLine)
+	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 {+})+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:+top,f1:+top"+
+			",,:abort,::accept,+:execute:++\nfoobar,Y:execute(baz)+up")
+	check(tui.CtrlA, "", actKillLine)
+	check(tui.CtrlB, "", actToggleSort, actUp, actDown)
+	check(tui.AltZ+'c', "", actPageUp)
+	check(tui.AltZ+',', "", actAbort)
+	check(tui.AltZ+':', "", actAccept)
+	check(tui.AltZ, "", actPageDown)
+	check(tui.F1, "ls {+}", actExecute, actAbort, actExecute, actSelectAll, actTop, actTop)
+	check(tui.F2, "echo {}, {}, {}", actExecute)
+	check(tui.F3, "echo '({})'", actExecute)
+	check(tui.F4, "less {}", actExecute)
+	check(tui.AltZ+'x', "foo+bar", actExecute)
+	check(tui.AltZ+'X', "bar+baz", actExecute)
+	check(tui.AltA, "echo (,),[,],/,:,;,%,{}", actExecuteMulti)
+	check(tui.AltB, "echo (,),[,],/,:,@,%,{}", actExecute)
+	check(tui.AltZ+'+', "++\nfoobar,Y:execute(baz)+up", actExecute)
+
+	for idx, char := range []rune{'~', '!', '@', '#', '$', '%', '^', '&', '*', '|', ';', '/'} {
+		parseKeymap(keymap, fmt.Sprintf("%d:execute%cfoobar%c", idx%10, char, char))
+		check(tui.AltZ+int([]rune(fmt.Sprintf("%d", idx%10))[0]), "foobar", actExecute)
+	}
+
+	parseKeymap(keymap, "f1:abort")
+	check(tui.F1, "", actAbort)
+}
+
+func TestColorSpec(t *testing.T) {
+	theme := tui.Dark256
+	dark := parseTheme(theme, "dark")
+	if *dark != *theme {
+		t.Errorf("colors should be equivalent")
+	}
+	if dark == theme {
+		t.Errorf("point should not be equivalent")
+	}
+
+	light := parseTheme(theme, "dark,light")
+	if *light == *theme {
+		t.Errorf("should not be equivalent")
+	}
+	if *light != *tui.Light256 {
+		t.Errorf("colors should be equivalent")
+	}
+	if light == theme {
+		t.Errorf("point should not be equivalent")
+	}
+
+	customized := parseTheme(theme, "fg:231,bg:232")
+	if customized.Fg.Color != 231 || customized.Bg.Color != 232 {
+		t.Errorf("color not customized")
+	}
+	if *tui.Dark256 == *customized {
+		t.Errorf("colors should not 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 != tui.Dark256.Fg || customized.Bg == tui.Dark256.Bg {
+		t.Errorf("color not customized")
+	}
+}
+
+func TestDefaultCtrlNP(t *testing.T) {
+	check := func(words []string, key int, expected actionType) {
+		opts := defaultOptions()
+		parseOptions(opts, words)
+		postProcessOptions(opts)
+		if opts.Keymap[key][0].t != expected {
+			t.Error()
+		}
+	}
+	check([]string{}, tui.CtrlN, actDown)
+	check([]string{}, tui.CtrlP, actUp)
+
+	check([]string{"--bind=ctrl-n:accept"}, tui.CtrlN, actAccept)
+	check([]string{"--bind=ctrl-p:accept"}, tui.CtrlP, actAccept)
+
+	f, _ := ioutil.TempFile("", "fzf-history")
+	f.Close()
+	hist := "--history=" + f.Name()
+	check([]string{hist}, tui.CtrlN, actNextHistory)
+	check([]string{hist}, tui.CtrlP, actPreviousHistory)
+
+	check([]string{hist, "--bind=ctrl-n:accept"}, tui.CtrlN, actAccept)
+	check([]string{hist, "--bind=ctrl-n:accept"}, tui.CtrlP, actPreviousHistory)
+
+	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) {
+	opts := optsFor()
+	if opts.ToggleSort {
+		t.Error()
+	}
+
+	opts = optsFor("--bind=a:toggle-sort")
+	if !opts.ToggleSort {
+		t.Error()
+	}
+
+	opts = optsFor("--bind=a:toggle-sort", "--bind=a:up")
+	if opts.ToggleSort {
+		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}-/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}-/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},
+		{"\n", false},
+		{"\t", 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)
+		}
+	}
+}

src/pattern.go

@@ -0,0 +1,425 @@
+package fzf
+
+import (
+	"fmt"
+	"regexp"
+	"strings"
+
+	"github.com/junegunn/fzf/src/algo"
+	"github.com/junegunn/fzf/src/util"
+)
+
+// fuzzy
+// 'exact
+// ^prefix-exact
+// suffix-exact$
+// !inverse-exact
+// !'inverse-fuzzy
+// !^inverse-prefix-exact
+// !inverse-suffix-exact$
+
+type termType int
+
+const (
+	termFuzzy termType = iota
+	termExact
+	termPrefix
+	termSuffix
+	termEqual
+)
+
+type term struct {
+	typ           termType
+	inv           bool
+	text          []rune
+	caseSensitive bool
+	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
+
+// Pattern represents search pattern
+type Pattern struct {
+	fuzzy         bool
+	fuzzyAlgo     algo.Algo
+	extended      bool
+	caseSensitive bool
+	normalize     bool
+	forward       bool
+	text          []rune
+	termSets      []termSet
+	sortable      bool
+	cacheable     bool
+	cacheKey      string
+	delimiter     Delimiter
+	nth           []Range
+	procFun       map[termType]algo.Algo
+}
+
+var (
+	_patternCache map[string]*Pattern
+	_splitRegex   *regexp.Regexp
+	_cache        ChunkCache
+)
+
+func init() {
+	_splitRegex = regexp.MustCompile(" +")
+	clearPatternCache()
+	clearChunkCache()
+}
+
+func clearPatternCache() {
+	// We can uniquely identify the pattern for a given string since
+	// search mode and caseMode do not change while the program is running
+	_patternCache = make(map[string]*Pattern)
+}
+
+func clearChunkCache() {
+	_cache = NewChunkCache()
+}
+
+// BuildPattern builds Pattern object from the given arguments
+func BuildPattern(fuzzy bool, fuzzyAlgo algo.Algo, extended bool, caseMode Case, normalize bool, forward bool,
+	cacheable bool, nth []Range, delimiter Delimiter, runes []rune) *Pattern {
+
+	var asString string
+	if extended {
+		asString = strings.TrimLeft(string(runes), " ")
+		for strings.HasSuffix(asString, " ") && !strings.HasSuffix(asString, "\\ ") {
+			asString = asString[:len(asString)-1]
+		}
+	} else {
+		asString = string(runes)
+	}
+
+	cached, found := _patternCache[asString]
+	if found {
+		return cached
+	}
+
+	caseSensitive := true
+	sortable := true
+	termSets := []termSet{}
+
+	if extended {
+		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 !cacheable || idx > 0 || term.inv || fuzzy && term.typ != termFuzzy || !fuzzy && term.typ != termExact {
+					cacheable = false
+					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 {
+			asString = lowerString
+		}
+	}
+
+	ptr := &Pattern{
+		fuzzy:         fuzzy,
+		fuzzyAlgo:     fuzzyAlgo,
+		extended:      extended,
+		caseSensitive: caseSensitive,
+		normalize:     normalize,
+		forward:       forward,
+		text:          []rune(asString),
+		termSets:      termSets,
+		sortable:      sortable,
+		cacheable:     cacheable,
+		nth:           nth,
+		delimiter:     delimiter,
+		procFun:       make(map[termType]algo.Algo)}
+
+	ptr.cacheKey = ptr.buildCacheKey()
+	ptr.procFun[termFuzzy] = fuzzyAlgo
+	ptr.procFun[termEqual] = algo.EqualMatch
+	ptr.procFun[termExact] = algo.ExactMatchNaive
+	ptr.procFun[termPrefix] = algo.PrefixMatch
+	ptr.procFun[termSuffix] = algo.SuffixMatch
+
+	_patternCache[asString] = ptr
+	return ptr
+}
+
+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, 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
+		}
+		if !fuzzy {
+			typ = termExact
+		}
+
+		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 && !inv {
+				typ = termExact
+				text = text[1:]
+			} else {
+				typ = termFuzzy
+				text = text[1:]
+			}
+		} else if strings.HasPrefix(text, "^") {
+			if typ == termSuffix {
+				typ = termEqual
+			} else {
+				typ = termPrefix
+			}
+			text = text[1:]
+		}
+
+		if len(text) > 0 {
+			if switchSet {
+				sets = append(sets, set)
+				set = termSet{}
+			}
+			textRunes := []rune(text)
+			if normalizeTerm {
+				textRunes = algo.NormalizeRunes(textRunes)
+			}
+			set = append(set, term{
+				typ:           typ,
+				inv:           inv,
+				text:          textRunes,
+				caseSensitive: caseSensitive,
+				normalize:     normalizeTerm})
+			switchSet = true
+		}
+	}
+	if len(set) > 0 {
+		sets = append(sets, set)
+	}
+	return sets
+}
+
+// IsEmpty returns true if the pattern is effectively empty
+func (p *Pattern) IsEmpty() bool {
+	if !p.extended {
+		return len(p.text) == 0
+	}
+	return len(p.termSets) == 0
+}
+
+// AsString returns the search query in string type
+func (p *Pattern) AsString() string {
+	return string(p.text)
+}
+
+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].text))
+		}
+	}
+	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, slab *util.Slab) []Result {
+	// ChunkCache: Exact match
+	cacheKey := p.CacheKey()
+	if p.cacheable {
+		if cached := _cache.Lookup(chunk, cacheKey); cached != nil {
+			return cached
+		}
+	}
+
+	// Prefix/suffix cache
+	space := _cache.Search(chunk, cacheKey)
+
+	matches := p.matchChunk(chunk, space, slab)
+
+	if p.cacheable {
+		_cache.Add(chunk, cacheKey, matches)
+	}
+	return matches
+}
+
+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], false, slab); match != nil {
+				matches = append(matches, *match)
+			}
+		}
+	} else {
+		for _, result := range space {
+			if match, _, _ := p.MatchItem(result.item, false, slab); match != nil {
+				matches = append(matches, *match)
+			}
+		}
+	}
+	return matches
+}
+
+// MatchItem returns true if the Item is a match
+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
+	}
+	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 (p *Pattern) basicMatch(item *Item, withPos bool, slab *util.Slab) (Offset, int, *[]int) {
+	var input []Token
+	if len(p.nth) == 0 {
+		input = []Token{Token{text: &item.text, prefixLength: 0}}
+	} else {
+		input = p.transformInput(item)
+	}
+	if p.fuzzy {
+		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.normalize, p.forward, p.text, withPos, slab)
+}
+
+func (p *Pattern) extendedMatch(item *Item, withPos bool, slab *util.Slab) ([]Offset, int, *[]int) {
+	var input []Token
+	if len(p.nth) == 0 {
+		input = []Token{Token{text: &item.text, prefixLength: 0}}
+	} else {
+		input = p.transformInput(item)
+	}
+	offsets := []Offset{}
+	var totalScore int
+	var allPos *[]int
+	if withPos {
+		allPos = &[]int{}
+	}
+	for _, termSet := range p.termSets {
+		var offset Offset
+		var currentScore int
+		matched := false
+		for _, term := range termSet {
+			pfun := p.procFun[term.typ]
+			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, 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, currentScore = Offset{0, 0}, 0
+				matched = true
+				continue
+			}
+		}
+		if matched {
+			offsets = append(offsets, offset)
+			totalScore += currentScore
+		}
+	}
+	return offsets, totalScore, allPos
+}
+
+func (p *Pattern) transformInput(item *Item) []Token {
+	if item.transformed != nil {
+		return *item.transformed
+	}
+
+	tokens := Tokenize(item.text.ToString(), p.delimiter)
+	ret := Transform(tokens, p.nth)
+	item.transformed = &ret
+	return ret
+}
+
+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 {
+		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
+		}
+	}
+	return Offset{-1, -1}, 0, nil
+}

src/pattern_test.go

@@ -0,0 +1,209 @@
+package fzf
+
+import (
+	"reflect"
+	"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, 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 != 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 != termExact || !terms[8][3].inv {
+		t.Errorf("%v", terms)
+	}
+	for _, termSet := range terms[:8] {
+		term := termSet[0]
+		if len(term.text) != 3 {
+			t.Errorf("%v", term)
+		}
+	}
+}
+
+func TestParseTermsExtendedExact(t *testing.T) {
+	terms := parseTerms(false, CaseSmart, false,
+		"aaa 'bbb ^ccc ddd$ !eee !'fff !^ggg !hhh$")
+	if len(terms) != 8 ||
+		terms[0][0].typ != termExact || terms[0][0].inv || len(terms[0][0].text) != 3 ||
+		terms[1][0].typ != termFuzzy || terms[1][0].inv || len(terms[1][0].text) != 3 ||
+		terms[2][0].typ != termPrefix || terms[2][0].inv || len(terms[2][0].text) != 3 ||
+		terms[3][0].typ != termSuffix || terms[3][0].inv || len(terms[3][0].text) != 3 ||
+		terms[4][0].typ != termExact || !terms[4][0].inv || len(terms[4][0].text) != 3 ||
+		terms[5][0].typ != termFuzzy || !terms[5][0].inv || len(terms[5][0].text) != 3 ||
+		terms[6][0].typ != termPrefix || !terms[6][0].inv || len(terms[6][0].text) != 3 ||
+		terms[7][0].typ != termSuffix || !terms[7][0].inv || len(terms[7][0].text) != 3 {
+		t.Errorf("%v", terms)
+	}
+}
+
+func TestParseTermsEmpty(t *testing.T) {
+	terms := parseTerms(true, CaseSmart, false, "' ^ !' !^")
+	if len(terms) != 0 {
+		t.Errorf("%v", terms)
+	}
+}
+
+func TestExact(t *testing.T) {
+	defer clearPatternCache()
+	clearPatternCache()
+	pattern := BuildPattern(true, algo.FuzzyMatchV2, true, CaseSmart, false, true, true,
+		[]Range{}, Delimiter{}, []rune("'abc"))
+	chars := util.ToChars([]byte("aabbcc abc"))
+	res, pos := algo.ExactMatchNaive(
+		pattern.caseSensitive, pattern.normalize, pattern.forward, &chars, pattern.termSets[0][0].text, true, nil)
+	if res.Start != 7 || res.End != 10 {
+		t.Errorf("%v / %d / %d", pattern.termSets, res.Start, res.End)
+	}
+	if pos != nil {
+		t.Errorf("pos is expected to be nil")
+	}
+}
+
+func TestEqual(t *testing.T) {
+	defer clearPatternCache()
+	clearPatternCache()
+	pattern := BuildPattern(true, algo.FuzzyMatchV2, true, CaseSmart, false, true, true, []Range{}, Delimiter{}, []rune("^AbC$"))
+
+	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("%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, algo.FuzzyMatchV2, false, CaseSmart, false, true, true, []Range{}, Delimiter{}, []rune("abc"))
+	clearPatternCache()
+	pat2 := BuildPattern(true, algo.FuzzyMatchV2, false, CaseSmart, false, true, true, []Range{}, Delimiter{}, []rune("Abc"))
+	clearPatternCache()
+	pat3 := BuildPattern(true, algo.FuzzyMatchV2, false, CaseIgnore, false, true, true, []Range{}, Delimiter{}, []rune("abc"))
+	clearPatternCache()
+	pat4 := BuildPattern(true, algo.FuzzyMatchV2, false, CaseIgnore, false, true, true, []Range{}, Delimiter{}, []rune("Abc"))
+	clearPatternCache()
+	pat5 := BuildPattern(true, algo.FuzzyMatchV2, false, CaseRespect, false, true, true, []Range{}, Delimiter{}, []rune("abc"))
+	clearPatternCache()
+	pat6 := BuildPattern(true, algo.FuzzyMatchV2, false, CaseRespect, false, true, true, []Range{}, Delimiter{}, []rune("Abc"))
+
+	if string(pat1.text) != "abc" || pat1.caseSensitive != false ||
+		string(pat2.text) != "Abc" || pat2.caseSensitive != true ||
+		string(pat3.text) != "abc" || pat3.caseSensitive != false ||
+		string(pat4.text) != "abc" || pat4.caseSensitive != false ||
+		string(pat5.text) != "abc" || pat5.caseSensitive != true ||
+		string(pat6.text) != "Abc" || pat6.caseSensitive != true {
+		t.Error("Invalid case conversion")
+	}
+}
+
+func TestOrigTextAndTransformed(t *testing.T) {
+	pattern := BuildPattern(true, algo.FuzzyMatchV2, true, CaseSmart, false, true, true, []Range{}, Delimiter{}, []rune("jg"))
+	tokens := Tokenize("junegunn", Delimiter{})
+	trans := Transform(tokens, []Range{Range{1, 1}})
+
+	origBytes := []byte("junegunn.choi")
+	for _, extended := range []bool{false, true} {
+		chunk := Chunk{count: 1}
+		chunk.items[0] = Item{
+			text:        util.ToChars([]byte("junegunn")),
+			origText:    &origBytes,
+			transformed: &trans}
+		pattern.extended = extended
+		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) {
+		clearPatternCache()
+		pat := BuildPattern(true, algo.FuzzyMatchV2, extended, CaseSmart, false, true, 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: %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\tbar\tbaz", true)
+	test(true, "foo !bar", "foo", 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", "", 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, 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 @@
+// +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 @@
+// +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")
+}

src/reader.go

@@ -0,0 +1,201 @@
+package fzf
+
+import (
+	"bufio"
+	"context"
+	"io"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"sync"
+	"sync/atomic"
+	"time"
+
+	"github.com/junegunn/fzf/src/util"
+	"github.com/saracen/walker"
+)
+
+// Reader reads from command or standard input
+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 bash
+		shell := "bash"
+		cmd := os.Getenv("FZF_DEFAULT_COMMAND")
+		if len(cmd) == 0 {
+			if defaultCommand != "" {
+				success = r.readFromCommand(&shell, defaultCommand)
+			} else {
+				success = r.readFiles()
+			}
+		} else {
+			success = r.readFromCommand(nil, cmd)
+		}
+	} else {
+		success = r.readFromStdin()
+	}
+	r.fin(success)
+}
+
+func (r *Reader) feed(src io.Reader) {
+	delim := byte('\n')
+	if r.delimNil {
+		delim = '\000'
+	}
+	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)
+		byteaLen := len(bytea)
+		if byteaLen > 0 {
+			if err == nil {
+				// 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) {
+				atomic.StoreInt32(&r.event, int32(EvtReadNew))
+			}
+		}
+		if err != nil {
+			break
+		}
+	}
+}
+
+func (r *Reader) readFromStdin() bool {
+	r.feed(os.Stdin)
+	return true
+}
+
+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
+	}
+	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

@@ -0,0 +1,63 @@
+package fzf
+
+import (
+	"testing"
+	"time"
+
+	"github.com/junegunn/fzf/src/util"
+)
+
+func TestReadFromCommand(t *testing.T) {
+	strs := []string{}
+	eb := util.NewEventBox()
+	reader := NewReader(
+		func(s []byte) bool { strs = append(strs, string(s)); return true },
+		eb, false, true)
+
+	reader.startEventPoller()
+
+	// Check EventBox
+	if eb.Peek(EvtReadNew) {
+		t.Error("EvtReadNew should not be set yet")
+	}
+
+	// Normal command
+	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
+	eb.WaitFor(EvtReadFin)
+
+	// Wait should return immediately
+	eb.Wait(func(events *util.Events) {
+		events.Clear()
+	})
+
+	// EventBox is cleared
+	if eb.Peek(EvtReadNew) {
+		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.fin(reader.readFromCommand(nil, `no-such-command`))
+	strs = []string{}
+	if len(strs) > 0 {
+		t.Errorf("%s", strs)
+	}
+
+	// Check EventBox again
+	if eb.Peek(EvtReadNew) {
+		t.Error("Command failed. EvtReadNew should not be set")
+	}
+	if !eb.Peek(EvtReadFin) {
+		t.Error("EvtReadFin should be set")
+	}
+}

src/result.go

@@ -0,0 +1,231 @@
+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 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()))
+				}
+			}
+		}
+		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
+			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)
+					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 @@
+// +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 +1,159 @@
+// +build !tcell
+
+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{
+		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 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}
+
+	strs := [][]rune{[]rune("foo"), []rune("foobar"), []rune("bar"), []rune("baz")}
+	item1 := buildResult(
+		withIndex(&Item{text: util.RunesToChars(strs[0])}, 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(strs[0])}, []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{Offset{1, 3}, Offset{5, 7}}, 3)
+	item4 := buildResult(
+		withIndex(&Item{}, 2), []Offset{Offset{1, 2}, Offset{6, 7}}, 4)
+	item5 := buildResult(
+		withIndex(&Item{}, 2), []Offset{Offset{1, 3}, Offset{5, 7}}, 5)
+	item6 := buildResult(
+		withIndex(&Item{}, 2), []Offset{Offset{1, 2}, Offset{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 TestColorOffset(t *testing.T) {
+	// ------------ 20 ----  --  ----
+	//   ++++++++        ++++++++++
+	// --++++++++--    --++++++++++---
+
+	offsets := []Offset{{5, 15}, {25, 35}}
+	item := Result{
+		item: &Item{
+			colors: &[]ansiOffset{
+				{[2]int32{0, 20}, ansiState{1, 5, 0}},
+				{[2]int32{22, 27}, ansiState{2, 6, tui.Bold}},
+				{[2]int32{30, 32}, ansiState{3, 7, 0}},
+				{[2]int32{33, 40}, ansiState{4, 8, tui.Bold}}}}}
+
+	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 @@
+// +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/terminal_test.go

@@ -0,0 +1,139 @@
+package fzf
+
+import (
+	"regexp"
+	"testing"
+
+	"github.com/junegunn/fzf/src/util"
+)
+
+func newItem(str string) *Item {
+	bytes := []byte(str)
+	trimmed, _, _ := extractColor(str, nil, nil)
+	return &Item{origText: &bytes, text: util.ToChars([]byte(trimmed))}
+}
+
+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)
+		}
+	}
+	printsep := "\n"
+	// {}, preserve ansi
+	result = replacePlaceholder("echo {}", false, Delimiter{}, printsep, false, "query", items1)
+	check("echo '  foo'\\''bar \x1b[31mbaz\x1b[m'")
+
+	// {}, strip ansi
+	result = replacePlaceholder("echo {}", true, Delimiter{}, printsep, false, "query", items1)
+	check("echo '  foo'\\''bar baz'")
+
+	// {}, with multiple items
+	result = replacePlaceholder("echo {}", true, Delimiter{}, printsep, false, "query", items2)
+	check("echo 'foo'\\''bar baz'")
+
+	// {..}, strip leading whitespaces, preserve ansi
+	result = replacePlaceholder("echo {..}", false, Delimiter{}, printsep, false, "query", items1)
+	check("echo 'foo'\\''bar \x1b[31mbaz\x1b[m'")
+
+	// {..}, strip leading whitespaces, strip ansi
+	result = replacePlaceholder("echo {..}", true, Delimiter{}, printsep, false, "query", items1)
+	check("echo 'foo'\\''bar baz'")
+
+	// {q}
+	result = replacePlaceholder("echo {} {q}", true, Delimiter{}, printsep, false, "query", items1)
+	check("echo '  foo'\\''bar baz' 'query'")
+
+	// {q}, multiple items
+	result = replacePlaceholder("echo {+}{q}{+}", true, Delimiter{}, printsep, false, "query 'string'", items2)
+	check("echo 'foo'\\''bar baz' 'FOO'\\''BAR BAZ''query '\\''string'\\''''foo'\\''bar baz' 'FOO'\\''BAR BAZ'")
+
+	result = replacePlaceholder("echo {}{q}{}", true, Delimiter{}, printsep, false, "query 'string'", items2)
+	check("echo 'foo'\\''bar baz''query '\\''string'\\''''foo'\\''bar baz'")
+
+	result = replacePlaceholder("echo {1}/{2}/{2,1}/{-1}/{-2}/{}/{..}/{n.t}/\\{}/\\{1}/\\{q}/{3}", true, Delimiter{}, printsep, false, "query", items1)
+	check("echo 'foo'\\''bar'/'baz'/'bazfoo'\\''bar'/'baz'/'foo'\\''bar'/'  foo'\\''bar baz'/'foo'\\''bar baz'/{n.t}/{}/{1}/{q}/''")
+
+	result = replacePlaceholder("echo {1}/{2}/{-1}/{-2}/{..}/{n.t}/\\{}/\\{1}/\\{q}/{3}", true, Delimiter{}, printsep, false, "query", items2)
+	check("echo 'foo'\\''bar'/'baz'/'baz'/'foo'\\''bar'/'foo'\\''bar baz'/{n.t}/{}/{1}/{q}/''")
+
+	result = replacePlaceholder("echo {+1}/{+2}/{+-1}/{+-2}/{+..}/{n.t}/\\{}/\\{1}/\\{q}/{+3}", true, Delimiter{}, printsep, false, "query", items2)
+	check("echo 'foo'\\''bar' 'FOO'\\''BAR'/'baz' 'BAZ'/'baz' 'BAZ'/'foo'\\''bar' 'FOO'\\''BAR'/'foo'\\''bar baz' 'FOO'\\''BAR BAZ'/{n.t}/{}/{1}/{q}/'' ''")
+
+	// forcePlus
+	result = replacePlaceholder("echo {1}/{2}/{-1}/{-2}/{..}/{n.t}/\\{}/\\{1}/\\{q}/{3}", true, Delimiter{}, printsep, true, "query", items2)
+	check("echo 'foo'\\''bar' 'FOO'\\''BAR'/'baz' 'BAZ'/'baz' 'BAZ'/'foo'\\''bar' 'FOO'\\''BAR'/'foo'\\''bar baz' 'FOO'\\''BAR BAZ'/{n.t}/{}/{1}/{q}/'' ''")
+
+	// Whitespace preserving flag with "'" delimiter
+	result = replacePlaceholder("echo {s1}", true, Delimiter{str: &delim}, printsep, false, "query", items1)
+	check("echo '  foo'")
+
+	result = replacePlaceholder("echo {s2}", true, Delimiter{str: &delim}, printsep, false, "query", items1)
+	check("echo 'bar baz'")
+
+	result = replacePlaceholder("echo {s}", true, Delimiter{str: &delim}, printsep, false, "query", items1)
+	check("echo '  foo'\\''bar baz'")
+
+	result = replacePlaceholder("echo {s..}", true, Delimiter{str: &delim}, printsep, false, "query", items1)
+	check("echo '  foo'\\''bar baz'")
+
+	// Whitespace preserving flag with regex delimiter
+	regex = regexp.MustCompile(`\w+`)
+
+	result = replacePlaceholder("echo {s1}", true, Delimiter{regex: regex}, printsep, false, "query", items1)
+	check("echo '  '")
+
+	result = replacePlaceholder("echo {s2}", true, Delimiter{regex: regex}, printsep, false, "query", items1)
+	check("echo ''\\'''")
+
+	result = replacePlaceholder("echo {s3}", true, Delimiter{regex: regex}, printsep, false, "query", items1)
+	check("echo ' '")
+
+	// No match
+	result = replacePlaceholder("echo {}/{+}", true, Delimiter{}, printsep, false, "query", []*Item{nil, nil})
+	check("echo /")
+
+	// No match, but with selections
+	result = replacePlaceholder("echo {}/{+}", true, Delimiter{}, printsep, false, "query", []*Item{nil, item1})
+	check("echo /'  foo'\\''bar baz'")
+
+	// String delimiter
+	result = replacePlaceholder("echo {}/{1}/{2}", true, Delimiter{str: &delim}, printsep, false, "query", items1)
+	check("echo '  foo'\\''bar baz'/'foo'/'bar baz'")
+
+	// Regex delimiter
+	regex = regexp.MustCompile("[oa]+")
+	// foo'bar baz
+	result = replacePlaceholder("echo {}/{1}/{3}/{2..3}", true, Delimiter{regex: regex}, printsep, false, "query", items1)
+	check("echo '  foo'\\''bar baz'/'f'/'r b'/''\\''bar b'")
+}
+
+func TestQuoteEntryCmd(t *testing.T) {
+	tests := map[string]string{
+		`"`:                       `^"\^"^"`,
+		`\`:                       `^"\\^"`,
+		`\"`:                      `^"\\\^"^"`,
+		`"\\\"`:                   `^"\^"\\\\\\\^"^"`,
+		`&|<>()@^%!`:              `^"^&^|^<^>^(^)^@^^^%^!^"`,
+		`%USERPROFILE%`:           `^"^%USERPROFILE^%^"`,
+		`C:\Program Files (x86)\`: `^"C:\\Program Files ^(x86^)\\^"`,
+	}
+
+	for input, expected := range tests {
+		escaped := quoteEntryCmd(input)
+		if escaped != expected {
+			t.Errorf("Input: %s, expected: %s, actual %s", input, expected, escaped)
+		}
+	}
+}

src/terminal_unix.go

@@ -0,0 +1,21 @@
+// +build !windows
+
+package fzf
+
+import (
+	"os"
+	"os/signal"
+	"syscall"
+)
+
+func notifyOnResize(resizeChan chan<- os.Signal) {
+	signal.Notify(resizeChan, syscall.SIGWINCH)
+}
+
+func notifyStop(p *os.Process) {
+	p.Signal(syscall.SIGSTOP)
+}
+
+func notifyOnCont(resizeChan chan<- os.Signal) {
+	signal.Notify(resizeChan, syscall.SIGCONT)
+}

src/terminal_windows.go

@@ -0,0 +1,19 @@
+// +build windows
+
+package fzf
+
+import (
+	"os"
+)
+
+func notifyOnResize(resizeChan chan<- os.Signal) {
+	// TODO
+}
+
+func notifyStop(p *os.Process) {
+	// NOOP
+}
+
+func notifyOnCont(resizeChan chan<- os.Signal) {
+	// NOOP
+}

src/tokenizer.go

@@ -0,0 +1,253 @@
+package fzf
+
+import (
+	"bytes"
+	"fmt"
+	"regexp"
+	"strconv"
+	"strings"
+
+	"github.com/junegunn/fzf/src/util"
+)
+
+const rangeEllipsis = 0
+
+// Range represents nth-expression
+type Range struct {
+	begin int
+	end   int
+}
+
+// Token contains the tokenized part of the strings and its prefix length
+type Token struct {
+	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
+type Delimiter struct {
+	regex *regexp.Regexp
+	str   *string
+}
+
+// String returns the string representation of a Delimeter.
+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
+	}
+	if end == -1 {
+		end = rangeEllipsis
+	}
+	return Range{begin, end}
+}
+
+// ParseRange parses nth-expression and returns the corresponding Range object
+func ParseRange(str *string) (Range, bool) {
+	if (*str) == ".." {
+		return newRange(rangeEllipsis, rangeEllipsis), true
+	} else if strings.HasPrefix(*str, "..") {
+		end, err := strconv.Atoi((*str)[2:])
+		if err != nil || end == 0 {
+			return Range{}, false
+		}
+		return newRange(rangeEllipsis, end), true
+	} else if strings.HasSuffix(*str, "..") {
+		begin, err := strconv.Atoi((*str)[:len(*str)-2])
+		if err != nil || begin == 0 {
+			return Range{}, false
+		}
+		return newRange(begin, rangeEllipsis), true
+	} else if strings.Contains(*str, "..") {
+		ns := strings.Split(*str, "..")
+		if len(ns) != 2 {
+			return Range{}, false
+		}
+		begin, err1 := strconv.Atoi(ns[0])
+		end, err2 := strconv.Atoi(ns[1])
+		if err1 != nil || err2 != nil || begin == 0 || end == 0 {
+			return Range{}, false
+		}
+		return newRange(begin, end), true
+	}
+
+	n, err := strconv.Atoi(*str)
+	if err != nil || n == 0 {
+		return Range{}, false
+	}
+	return newRange(n, n), true
+}
+
+func withPrefixLengths(tokens []string, begin int) []Token {
+	ret := make([]Token, len(tokens))
+
+	prefixLength := begin
+	for idx := range tokens {
+		chars := util.ToChars([]byte(tokens[idx]))
+		ret[idx] = Token{&chars, int32(prefixLength)}
+		prefixLength += chars.Length()
+	}
+	return ret
+}
+
+const (
+	awkNil = iota
+	awkBlack
+	awkWhite
+)
+
+func awkTokenizer(input string) ([]string, int) {
+	// 9, 32
+	ret := []string{}
+	prefixLength := 0
+	state := awkNil
+	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, begin, end = awkBlack, idx, idx+1
+			}
+		case awkBlack:
+			end = idx + 1
+			if white {
+				state = awkWhite
+			}
+		case awkWhite:
+			if white {
+				end = idx + 1
+			} else {
+				ret = append(ret, input[begin:end])
+				state, begin, end = awkBlack, idx, idx+1
+			}
+		}
+	}
+	if begin < end {
+		ret = append(ret, input[begin:end])
+	}
+	return ret, prefixLength
+}
+
+// Tokenize tokenizes the given string with the delimiter
+func Tokenize(text string, delimiter Delimiter) []Token {
+	if delimiter.str == nil && delimiter.regex == nil {
+		// AWK-style (\S+\s*)
+		tokens, prefixLength := awkTokenizer(text)
+		return withPrefixLengths(tokens, prefixLength)
+	}
+
+	if delimiter.str != nil {
+		return withPrefixLengths(strings.SplitAfter(text, *delimiter.str), 0)
+	}
+
+	// FIXME performance
+	var tokens []string
+	if delimiter.regex != nil {
+		for len(text) > 0 {
+			loc := delimiter.regex.FindStringIndex(text)
+			if len(loc) < 2 {
+				loc = []int{0, len(text)}
+			}
+			last := util.Max(loc[1], 1)
+			tokens = append(tokens, text[:last])
+			text = text[last:]
+		}
+	}
+	return withPrefixLengths(tokens, 0)
+}
+
+func joinTokens(tokens []Token) string {
+	var output bytes.Buffer
+	for _, token := range tokens {
+		output.WriteString(token.text.ToString())
+	}
+	return output.String()
+}
+
+// Transform is used to transform the input when --with-nth option is given
+func Transform(tokens []Token, withNth []Range) []Token {
+	transTokens := make([]Token, len(withNth))
+	numTokens := len(tokens)
+	for idx, r := range withNth {
+		parts := []*util.Chars{}
+		minIdx := 0
+		if r.begin == r.end {
+			idx := r.begin
+			if idx == rangeEllipsis {
+				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
+					parts = append(parts, tokens[idx-1].text)
+				}
+			}
+		} else {
+			var begin, end int
+			if r.begin == rangeEllipsis { // ..N
+				begin, end = 1, r.end
+				if end < 0 {
+					end += numTokens + 1
+				}
+			} else if r.end == rangeEllipsis { // N..
+				begin, end = r.begin, numTokens
+				if begin < 0 {
+					begin += numTokens + 1
+				}
+			} else {
+				begin, end = r.begin, r.end
+				if begin < 0 {
+					begin += numTokens + 1
+				}
+				if end < 0 {
+					end += numTokens + 1
+				}
+			}
+			minIdx = util.Max(0, begin-1)
+			for idx := begin; idx <= end; idx++ {
+				if idx >= 1 && idx <= numTokens {
+					parts = append(parts, tokens[idx-1].text)
+				}
+			}
+		}
+		// 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{&merged, prefixLength}
+	}
+	return transTokens
+}

src/tokenizer_test.go

@@ -0,0 +1,112 @@
+package fzf
+
+import (
+	"testing"
+)
+
+func TestParseRange(t *testing.T) {
+	{
+		i := ".."
+		r, _ := ParseRange(&i)
+		if r.begin != rangeEllipsis || r.end != rangeEllipsis {
+			t.Errorf("%v", r)
+		}
+	}
+	{
+		i := "3.."
+		r, _ := ParseRange(&i)
+		if r.begin != 3 || r.end != rangeEllipsis {
+			t.Errorf("%v", r)
+		}
+	}
+	{
+		i := "3..5"
+		r, _ := ParseRange(&i)
+		if r.begin != 3 || r.end != 5 {
+			t.Errorf("%v", r)
+		}
+	}
+	{
+		i := "-3..-5"
+		r, _ := ParseRange(&i)
+		if r.begin != -3 || r.end != -5 {
+			t.Errorf("%v", r)
+		}
+	}
+	{
+		i := "3"
+		r, _ := ParseRange(&i)
+		if r.begin != 3 || r.end != 3 {
+			t.Errorf("%v", r)
+		}
+	}
+}
+
+func TestTokenize(t *testing.T) {
+	// AWK-style
+	input := "  abc:  def:  ghi  "
+	tokens := Tokenize(input, Delimiter{})
+	if tokens[0].text.ToString() != "abc:  " || tokens[0].prefixLength != 2 {
+		t.Errorf("%s", tokens)
+	}
+
+	// With delimiter
+	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(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)
+	}
+}
+
+func TestTransform(t *testing.T) {
+	input := "  abc:  def:  ghi:  jkl"
+	{
+		tokens := Tokenize(input, Delimiter{})
+		{
+			ranges := splitNth("1,2,3")
+			tx := Transform(tokens, ranges)
+			if joinTokens(tx) != "abc:  def:  ghi:  " {
+				t.Errorf("%s", tx)
+			}
+		}
+		{
+			ranges := splitNth("1..2,3,2..,1")
+			tx := Transform(tokens, ranges)
+			if string(joinTokens(tx)) != "abc:  def:  ghi:  def:  ghi:  jklabc:  " ||
+				len(tx) != 4 ||
+				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(input, delimiterRegexp(":"))
+		{
+			ranges := splitNth("1..2,3,2..,1")
+			tx := Transform(tokens, ranges)
+			if joinTokens(tx) != "  abc:  def:  ghi:  def:  ghi:  jkl  abc:" ||
+				len(tx) != 4 ||
+				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)
+			}
+		}
+	}
+}
+
+func TestTransformIndexOutOfBounds(t *testing.T) {
+	Transform([]Token{}, splitNth("1"))
+}

src/tui/dummy.go

@@ -0,0 +1,46 @@
+// +build !ncurses
+// +build !tcell
+// +build !windows
+
+package tui
+
+type Attr int
+
+func HasFullscreenRenderer() bool {
+	return false
+}
+
+func (a Attr) Merge(b Attr) Attr {
+	return a | b
+}
+
+const (
+	AttrUndefined = Attr(0)
+	AttrRegular   = Attr(1 << 7)
+	AttrClear     = Attr(1 << 8)
+
+	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)
+)
+
+func (r *FullscreenRenderer) Init()             {}
+func (r *FullscreenRenderer) Pause(bool)        {}
+func (r *FullscreenRenderer) Resume(bool, bool) {}
+func (r *FullscreenRenderer) Clear()            {}
+func (r *FullscreenRenderer) Refresh()          {}
+func (r *FullscreenRenderer) Close()            {}
+
+func (r *FullscreenRenderer) GetChar() Event { return Event{} }
+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.go

@@ -0,0 +1,945 @@
+package tui
+
+import (
+	"fmt"
+	"os"
+	"regexp"
+	"strconv"
+	"strings"
+	"time"
+	"unicode/utf8"
+
+	"github.com/junegunn/fzf/src/util"
+
+	"golang.org/x/crypto/ssh/terminal"
+)
+
+const (
+	defaultWidth  = 80
+	defaultHeight = 24
+
+	defaultEscDelay = 100
+	escPollInterval = 5
+	offsetPollTries = 10
+	maxInputBuffer  = 10 * 1024
+)
+
+const consoleDevice string = "/dev/tty"
+
+var offsetRegexp *regexp.Regexp = regexp.MustCompile("(.*)\x1b\\[([0-9]+);([0-9]+)R")
+var offsetRegexpBegin *regexp.Regexp = regexp.MustCompile("^\x1b\\[[0-9]+;[0-9]+R")
+
+func (r *LightRenderer) stderr(str string) {
+	r.stderrInternal(str, true)
+}
+
+// FIXME: Need better handling of non-displayable characters
+func (r *LightRenderer) stderrInternal(str string, allowNLCR bool) {
+	bytes := []byte(str)
+	runes := []rune{}
+	for len(bytes) > 0 {
+		r, sz := utf8.DecodeRune(bytes)
+		nlcr := r == '\n' || r == '\r'
+		if r >= 32 || r == '\x1b' || nlcr {
+			if r == utf8.RuneError || nlcr && !allowNLCR {
+				runes = append(runes, ' ')
+			} else {
+				runes = append(runes, r)
+			}
+		}
+		bytes = bytes[sz:]
+	}
+	r.queued += string(runes)
+}
+
+func (r *LightRenderer) csi(code string) {
+	r.stderr("\x1b[" + code)
+}
+
+func (r *LightRenderer) flush() {
+	if len(r.queued) > 0 {
+		fmt.Fprint(os.Stderr, r.queued)
+		r.queued = ""
+	}
+}
+
+// Light renderer
+type LightRenderer struct {
+	theme         *ColorTheme
+	mouse         bool
+	forceBlack    bool
+	clearOnExit   bool
+	prevDownTime  time.Time
+	clickY        []int
+	ttyin         *os.File
+	buffer        []byte
+	origState     *terminal.State
+	width         int
+	height        int
+	yoffset       int
+	tabstop       int
+	escDelay      int
+	fullscreen    bool
+	upOneLine     bool
+	queued        string
+	y             int
+	x             int
+	maxHeightFunc func(int) int
+
+	// Windows only
+	ttyinChannel    chan byte
+	inHandle        uintptr
+	outHandle       uintptr
+	origStateInput  uint32
+	origStateOutput uint32
+}
+
+type LightWindow struct {
+	renderer *LightRenderer
+	colored  bool
+	preview  bool
+	border   BorderStyle
+	top      int
+	left     int
+	width    int
+	height   int
+	posx     int
+	posy     int
+	tabstop  int
+	fg       Color
+	bg       Color
+}
+
+func NewLightRenderer(theme *ColorTheme, forceBlack bool, mouse bool, tabstop int, clearOnExit bool, fullscreen bool, maxHeightFunc func(int) int) Renderer {
+	r := LightRenderer{
+		theme:         theme,
+		forceBlack:    forceBlack,
+		mouse:         mouse,
+		clearOnExit:   clearOnExit,
+		ttyin:         openTtyIn(),
+		yoffset:       0,
+		tabstop:       tabstop,
+		fullscreen:    fullscreen,
+		upOneLine:     false,
+		maxHeightFunc: maxHeightFunc}
+	return &r
+}
+
+func repeat(r rune, times int) string {
+	if times > 0 {
+		return strings.Repeat(string(r), times)
+	}
+	return ""
+}
+
+func atoi(s string, defaultValue int) int {
+	value, err := strconv.Atoi(s)
+	if err != nil {
+		return defaultValue
+	}
+	return value
+}
+
+func (r *LightRenderer) Init() {
+	r.escDelay = atoi(os.Getenv("ESCDELAY"), defaultEscDelay)
+
+	if err := r.initPlatform(); err != nil {
+		errorExit(err.Error())
+	}
+	r.updateTerminalSize()
+	initTheme(r.theme, r.defaultTheme(), r.forceBlack)
+
+	if r.fullscreen {
+		r.smcup()
+	} else {
+		// We assume that --no-clear is used for repetitive relaunching of fzf.
+		// So we do not clear the lower bottom of the screen.
+		if r.clearOnExit {
+			r.csi("J")
+		}
+		y, x := r.findOffset()
+		r.mouse = r.mouse && y >= 0
+		// When --no-clear is used for repetitive relaunching, there is a small
+		// time frame between fzf processes where the user keystrokes are not
+		// captured by either of fzf process which can cause x offset to be
+		// increased and we're left with unwanted extra new line.
+		if x > 0 && r.clearOnExit {
+			r.upOneLine = true
+			r.makeSpace()
+		}
+		for i := 1; i < r.MaxY(); i++ {
+			r.makeSpace()
+		}
+	}
+
+	if r.mouse {
+		r.csi("?1000h")
+	}
+	r.csi(fmt.Sprintf("%dA", r.MaxY()-1))
+	r.csi("G")
+	r.csi("K")
+	if !r.clearOnExit && !r.fullscreen {
+		r.csi("s")
+	}
+	if !r.fullscreen && r.mouse {
+		r.yoffset, _ = r.findOffset()
+	}
+}
+
+func (r *LightRenderer) makeSpace() {
+	r.stderr("\n")
+	r.csi("G")
+}
+
+func (r *LightRenderer) move(y int, x int) {
+	// w.csi("u")
+	if r.y < y {
+		r.csi(fmt.Sprintf("%dB", y-r.y))
+	} else if r.y > y {
+		r.csi(fmt.Sprintf("%dA", r.y-y))
+	}
+	r.stderr("\r")
+	if x > 0 {
+		r.csi(fmt.Sprintf("%dC", x))
+	}
+	r.y = y
+	r.x = x
+}
+
+func (r *LightRenderer) origin() {
+	r.move(0, 0)
+}
+
+func getEnv(name string, defaultValue int) int {
+	env := os.Getenv(name)
+	if len(env) == 0 {
+		return defaultValue
+	}
+	return atoi(env, defaultValue)
+}
+
+func (r *LightRenderer) getBytes() []byte {
+	return r.getBytesInternal(r.buffer, false)
+}
+
+func (r *LightRenderer) getBytesInternal(buffer []byte, nonblock bool) []byte {
+	c, ok := r.getch(nonblock)
+	if !nonblock && !ok {
+		r.Close()
+		errorExit("Failed to read " + consoleDevice)
+	}
+
+	retries := 0
+	if c == ESC || nonblock {
+		retries = r.escDelay / escPollInterval
+	}
+	buffer = append(buffer, byte(c))
+
+	pc := c
+	for {
+		c, ok = r.getch(true)
+		if !ok {
+			if retries > 0 {
+				retries--
+				time.Sleep(escPollInterval * time.Millisecond)
+				continue
+			}
+			break
+		} else if c == ESC && pc != c {
+			retries = r.escDelay / escPollInterval
+		} else {
+			retries = 0
+		}
+		buffer = append(buffer, byte(c))
+		pc = c
+
+		// This should never happen under normal conditions,
+		// so terminate fzf immediately.
+		if len(buffer) > maxInputBuffer {
+			r.Close()
+			panic(fmt.Sprintf("Input buffer overflow (%d): %v", len(buffer), buffer))
+		}
+	}
+
+	return buffer
+}
+
+func (r *LightRenderer) GetChar() Event {
+	if len(r.buffer) == 0 {
+		r.buffer = r.getBytes()
+	}
+	if len(r.buffer) == 0 {
+		panic("Empty buffer")
+	}
+
+	sz := 1
+	defer func() {
+		r.buffer = r.buffer[sz:]
+	}()
+
+	switch r.buffer[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 0:
+		return Event{CtrlSpace, 0, nil}
+	case 28:
+		return Event{CtrlBackSlash, 0, nil}
+	case 29:
+		return Event{CtrlRightBracket, 0, nil}
+	case 30:
+		return Event{CtrlCaret, 0, nil}
+	case 31:
+		return Event{CtrlSlash, 0, nil}
+	case ESC:
+		ev := r.escSequence(&sz)
+		// Second chance
+		if ev.Type == Invalid {
+			r.buffer = r.getBytes()
+			ev = r.escSequence(&sz)
+		}
+		return ev
+	}
+
+	// CTRL-A ~ CTRL-Z
+	if r.buffer[0] <= CtrlZ {
+		return Event{int(r.buffer[0]), 0, nil}
+	}
+	char, rsz := utf8.DecodeRune(r.buffer)
+	if char == utf8.RuneError {
+		return Event{ESC, 0, nil}
+	}
+	sz = rsz
+	return Event{Rune, char, nil}
+}
+
+func (r *LightRenderer) escSequence(sz *int) Event {
+	if len(r.buffer) < 2 {
+		return Event{ESC, 0, nil}
+	}
+
+	loc := offsetRegexpBegin.FindIndex(r.buffer)
+	if loc != nil && loc[0] == 0 {
+		*sz = loc[1]
+		return Event{Invalid, 0, nil}
+	}
+
+	*sz = 2
+	if r.buffer[1] >= 1 && r.buffer[1] <= 'z'-'a'+1 {
+		return Event{int(CtrlAltA + r.buffer[1] - 1), 0, nil}
+	}
+	alt := false
+	if len(r.buffer) > 2 && r.buffer[1] == ESC {
+		r.buffer = r.buffer[1:]
+		alt = true
+	}
+	switch r.buffer[1] {
+	case ESC:
+		return Event{ESC, 0, nil}
+	case ' ':
+		return Event{AltSpace, 0, nil}
+	case '/':
+		return Event{AltSlash, 0, nil}
+	case 'b':
+		return Event{AltB, 0, nil}
+	case 'd':
+		return Event{AltD, 0, nil}
+	case 'f':
+		return Event{AltF, 0, nil}
+	case 127:
+		return Event{AltBS, 0, nil}
+	case '[', 'O':
+		if len(r.buffer) < 3 {
+			return Event{Invalid, 0, nil}
+		}
+		*sz = 3
+		switch r.buffer[2] {
+		case 'D':
+			if alt {
+				return Event{AltLeft, 0, nil}
+			}
+			return Event{Left, 0, nil}
+		case 'C':
+			if alt {
+				// Ugh..
+				return Event{AltRight, 0, nil}
+			}
+			return Event{Right, 0, nil}
+		case 'B':
+			if alt {
+				return Event{AltDown, 0, nil}
+			}
+			return Event{Down, 0, nil}
+		case 'A':
+			if alt {
+				return Event{AltUp, 0, nil}
+			}
+			return Event{Up, 0, nil}
+		case 'Z':
+			return Event{BTab, 0, nil}
+		case 'H':
+			return Event{Home, 0, nil}
+		case 'F':
+			return Event{End, 0, nil}
+		case 'M':
+			return r.mouseSequence(sz)
+		case 'P':
+			return Event{F1, 0, nil}
+		case 'Q':
+			return Event{F2, 0, nil}
+		case 'R':
+			return Event{F3, 0, nil}
+		case 'S':
+			return Event{F4, 0, nil}
+		case '1', '2', '3', '4', '5', '6':
+			if len(r.buffer) < 4 {
+				return Event{Invalid, 0, nil}
+			}
+			*sz = 4
+			switch r.buffer[2] {
+			case '2':
+				if r.buffer[3] == '~' {
+					return Event{Insert, 0, nil}
+				}
+				if len(r.buffer) > 4 && r.buffer[4] == '~' {
+					*sz = 5
+					switch r.buffer[3] {
+					case '0':
+						return Event{F9, 0, nil}
+					case '1':
+						return Event{F10, 0, nil}
+					case '3':
+						return Event{F11, 0, nil}
+					case '4':
+						return Event{F12, 0, nil}
+					}
+				}
+				// Bracketed paste mode: \e[200~ ... \e[201~
+				if len(r.buffer) > 5 && r.buffer[3] == '0' && (r.buffer[4] == '0' || r.buffer[4] == '1') && r.buffer[5] == '~' {
+					// Immediately discard the sequence from the buffer and reread input
+					r.buffer = r.buffer[6:]
+					*sz = 0
+					return r.GetChar()
+				}
+				return Event{Invalid, 0, nil} // INS
+			case '3':
+				return Event{Del, 0, nil}
+			case '4':
+				return Event{End, 0, nil}
+			case '5':
+				return Event{PgUp, 0, nil}
+			case '6':
+				return Event{PgDn, 0, nil}
+			case '1':
+				switch r.buffer[3] {
+				case '~':
+					return Event{Home, 0, nil}
+				case '1', '2', '3', '4', '5', '7', '8', '9':
+					if len(r.buffer) == 5 && r.buffer[4] == '~' {
+						*sz = 5
+						switch r.buffer[3] {
+						case '1':
+							return Event{F1, 0, nil}
+						case '2':
+							return Event{F2, 0, nil}
+						case '3':
+							return Event{F3, 0, nil}
+						case '4':
+							return Event{F4, 0, nil}
+						case '5':
+							return Event{F5, 0, nil}
+						case '7':
+							return Event{F6, 0, nil}
+						case '8':
+							return Event{F7, 0, nil}
+						case '9':
+							return Event{F8, 0, nil}
+						}
+					}
+					return Event{Invalid, 0, nil}
+				case ';':
+					if len(r.buffer) != 6 {
+						return Event{Invalid, 0, nil}
+					}
+					*sz = 6
+					switch r.buffer[4] {
+					case '2', '5':
+						switch r.buffer[5] {
+						case 'A':
+							return Event{SUp, 0, nil}
+						case 'B':
+							return Event{SDown, 0, nil}
+						case 'C':
+							return Event{SRight, 0, nil}
+						case 'D':
+							return Event{SLeft, 0, nil}
+						}
+					} // r.buffer[4]
+				} // r.buffer[3]
+			} // r.buffer[2]
+		} // r.buffer[2]
+	} // r.buffer[1]
+	if r.buffer[1] >= 'a' && r.buffer[1] <= 'z' {
+		return Event{AltA + int(r.buffer[1]) - 'a', 0, nil}
+	}
+	if r.buffer[1] >= '0' && r.buffer[1] <= '9' {
+		return Event{Alt0 + int(r.buffer[1]) - '0', 0, nil}
+	}
+	return Event{Invalid, 0, nil}
+}
+
+func (r *LightRenderer) mouseSequence(sz *int) Event {
+	if len(r.buffer) < 6 || !r.mouse {
+		return Event{Invalid, 0, nil}
+	}
+	*sz = 6
+	switch r.buffer[3] {
+	case 32, 34, 36, 40, 48, // mouse-down / shift / cmd / ctrl
+		35, 39, 43, 51: // mouse-up / shift / cmd / ctrl
+		mod := r.buffer[3] >= 36
+		left := r.buffer[3] == 32
+		down := r.buffer[3]%2 == 0
+		x := int(r.buffer[4] - 33)
+		y := int(r.buffer[5]-33) - r.yoffset
+		double := false
+		if down {
+			now := time.Now()
+			if !left { // Right double click is not allowed
+				r.clickY = []int{}
+			} else if now.Sub(r.prevDownTime) < doubleClickDuration {
+				r.clickY = append(r.clickY, y)
+			} else {
+				r.clickY = []int{y}
+			}
+			r.prevDownTime = now
+		} else {
+			if len(r.clickY) > 1 && r.clickY[0] == r.clickY[1] &&
+				time.Since(r.prevDownTime) < doubleClickDuration {
+				double = true
+			}
+		}
+
+		return Event{Mouse, 0, &MouseEvent{y, x, 0, left, down, double, mod}}
+	case 96, 100, 104, 112, // scroll-up / shift / cmd / ctrl
+		97, 101, 105, 113: // scroll-down / shift / cmd / ctrl
+		mod := r.buffer[3] >= 100
+		s := 1 - int(r.buffer[3]%2)*2
+		x := int(r.buffer[4] - 33)
+		y := int(r.buffer[5]-33) - r.yoffset
+		return Event{Mouse, 0, &MouseEvent{y, x, s, false, false, false, mod}}
+	}
+	return Event{Invalid, 0, nil}
+}
+
+func (r *LightRenderer) smcup() {
+	r.csi("?1049h")
+}
+
+func (r *LightRenderer) rmcup() {
+	r.csi("?1049l")
+}
+
+func (r *LightRenderer) Pause(clear bool) {
+	r.restoreTerminal()
+	if clear {
+		if r.fullscreen {
+			r.rmcup()
+		} else {
+			r.smcup()
+			r.csi("H")
+		}
+		r.flush()
+	}
+}
+
+func (r *LightRenderer) Resume(clear bool, sigcont bool) {
+	r.setupTerminal()
+	if clear {
+		if r.fullscreen {
+			r.smcup()
+		} else {
+			r.rmcup()
+		}
+		r.flush()
+	} else if sigcont && !r.fullscreen && r.mouse {
+		// NOTE: SIGCONT (Coming back from CTRL-Z):
+		// It's highly likely that the offset we obtained at the beginning is
+		// no longer correct, so we simply disable mouse input.
+		r.csi("?1000l")
+		r.mouse = false
+	}
+}
+
+func (r *LightRenderer) Clear() {
+	if r.fullscreen {
+		r.csi("H")
+	}
+	// r.csi("u")
+	r.origin()
+	r.csi("J")
+	r.flush()
+}
+
+func (r *LightRenderer) RefreshWindows(windows []Window) {
+	r.flush()
+}
+
+func (r *LightRenderer) Refresh() {
+	r.updateTerminalSize()
+}
+
+func (r *LightRenderer) Close() {
+	// r.csi("u")
+	if r.clearOnExit {
+		if r.fullscreen {
+			r.rmcup()
+		} else {
+			r.origin()
+			if r.upOneLine {
+				r.csi("A")
+			}
+			r.csi("J")
+		}
+	} else if !r.fullscreen {
+		r.csi("u")
+	}
+	if r.mouse {
+		r.csi("?1000l")
+	}
+	r.flush()
+	r.closePlatform()
+	r.restoreTerminal()
+}
+
+func (r *LightRenderer) MaxX() int {
+	return r.width
+}
+
+func (r *LightRenderer) MaxY() int {
+	return r.height
+}
+
+func (r *LightRenderer) NewWindow(top int, left int, width int, height int, preview bool, borderStyle BorderStyle) Window {
+	w := &LightWindow{
+		renderer: r,
+		colored:  r.theme.Colored,
+		preview:  preview,
+		border:   borderStyle,
+		top:      top,
+		left:     left,
+		width:    width,
+		height:   height,
+		tabstop:  r.tabstop,
+		fg:       colDefault,
+		bg:       colDefault}
+	if preview {
+		w.fg = r.theme.PreviewFg.Color
+		w.bg = r.theme.PreviewBg.Color
+	} else {
+		w.fg = r.theme.Fg.Color
+		w.bg = r.theme.Bg.Color
+	}
+	w.drawBorder()
+	return w
+}
+
+func (w *LightWindow) drawBorder() {
+	switch w.border.shape {
+	case BorderRounded, BorderSharp:
+		w.drawBorderAround()
+	case BorderHorizontal:
+		w.drawBorderHorizontal(true, true)
+	case BorderVertical:
+		w.drawBorderVertical(true, true)
+	case BorderTop:
+		w.drawBorderHorizontal(true, false)
+	case BorderBottom:
+		w.drawBorderHorizontal(false, true)
+	case BorderLeft:
+		w.drawBorderVertical(true, false)
+	case BorderRight:
+		w.drawBorderVertical(false, true)
+	}
+}
+
+func (w *LightWindow) drawBorderHorizontal(top, bottom bool) {
+	if top {
+		w.Move(0, 0)
+		w.CPrint(ColBorder, repeat(w.border.horizontal, w.width))
+	}
+	if bottom {
+		w.Move(w.height-1, 0)
+		w.CPrint(ColBorder, repeat(w.border.horizontal, w.width))
+	}
+}
+
+func (w *LightWindow) drawBorderVertical(left, right bool) {
+	width := w.width - 2
+	if !left || !right {
+		width++
+	}
+	for y := 0; y < w.height; y++ {
+		w.Move(y, 0)
+		if left {
+			w.CPrint(ColBorder, string(w.border.vertical))
+		}
+		w.CPrint(ColBorder, repeat(' ', width))
+		if right {
+			w.CPrint(ColBorder, string(w.border.vertical))
+		}
+	}
+}
+
+func (w *LightWindow) drawBorderAround() {
+	w.Move(0, 0)
+	color := ColBorder
+	if w.preview {
+		color = ColPreviewBorder
+	}
+	w.CPrint(color, string(w.border.topLeft)+repeat(w.border.horizontal, w.width-2)+string(w.border.topRight))
+	for y := 1; y < w.height-1; y++ {
+		w.Move(y, 0)
+		w.CPrint(color, string(w.border.vertical))
+		w.CPrint(color, repeat(' ', w.width-2))
+		w.CPrint(color, string(w.border.vertical))
+	}
+	w.Move(w.height-1, 0)
+	w.CPrint(color, string(w.border.bottomLeft)+repeat(w.border.horizontal, w.width-2)+string(w.border.bottomRight))
+}
+
+func (w *LightWindow) csi(code string) {
+	w.renderer.csi(code)
+}
+
+func (w *LightWindow) stderrInternal(str string, allowNLCR bool) {
+	w.renderer.stderrInternal(str, allowNLCR)
+}
+
+func (w *LightWindow) Top() int {
+	return w.top
+}
+
+func (w *LightWindow) Left() int {
+	return w.left
+}
+
+func (w *LightWindow) Width() int {
+	return w.width
+}
+
+func (w *LightWindow) Height() int {
+	return w.height
+}
+
+func (w *LightWindow) Refresh() {
+}
+
+func (w *LightWindow) Close() {
+}
+
+func (w *LightWindow) X() int {
+	return w.posx
+}
+
+func (w *LightWindow) Y() int {
+	return w.posy
+}
+
+func (w *LightWindow) 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 *LightWindow) Move(y int, x int) {
+	w.posx = x
+	w.posy = y
+
+	w.renderer.move(w.Top()+y, w.Left()+x)
+}
+
+func (w *LightWindow) MoveAndClear(y int, x int) {
+	w.Move(y, x)
+	// We should not delete preview window on the right
+	// csi("K")
+	w.Print(repeat(' ', w.width-x))
+	w.Move(y, x)
+}
+
+func attrCodes(attr Attr) []string {
+	codes := []string{}
+	if (attr & AttrClear) > 0 {
+		return codes
+	}
+	if (attr & Bold) > 0 {
+		codes = append(codes, "1")
+	}
+	if (attr & Dim) > 0 {
+		codes = append(codes, "2")
+	}
+	if (attr & Italic) > 0 {
+		codes = append(codes, "3")
+	}
+	if (attr & Underline) > 0 {
+		codes = append(codes, "4")
+	}
+	if (attr & Blink) > 0 {
+		codes = append(codes, "5")
+	}
+	if (attr & Reverse) > 0 {
+		codes = append(codes, "7")
+	}
+	return codes
+}
+
+func colorCodes(fg Color, bg Color) []string {
+	codes := []string{}
+	appendCode := func(c Color, offset int) {
+		if c == colDefault {
+			return
+		}
+		if c.is24() {
+			r := (c >> 16) & 0xff
+			g := (c >> 8) & 0xff
+			b := (c) & 0xff
+			codes = append(codes, fmt.Sprintf("%d;2;%d;%d;%d", 38+offset, r, g, b))
+		} else if c >= colBlack && c <= colWhite {
+			codes = append(codes, fmt.Sprintf("%d", int(c)+30+offset))
+		} else if c > colWhite && c < 16 {
+			codes = append(codes, fmt.Sprintf("%d", int(c)+90+offset-8))
+		} else if c >= 16 && c < 256 {
+			codes = append(codes, fmt.Sprintf("%d;5;%d", 38+offset, c))
+		}
+	}
+	appendCode(fg, 0)
+	appendCode(bg, 10)
+	return codes
+}
+
+func (w *LightWindow) csiColor(fg Color, bg Color, attr Attr) bool {
+	codes := append(attrCodes(attr), colorCodes(fg, bg)...)
+	w.csi(";" + strings.Join(codes, ";") + "m")
+	return len(codes) > 0
+}
+
+func (w *LightWindow) Print(text string) {
+	w.cprint2(colDefault, w.bg, AttrRegular, text)
+}
+
+func cleanse(str string) string {
+	return strings.Replace(str, "\x1b", "", -1)
+}
+
+func (w *LightWindow) CPrint(pair ColorPair, text string) {
+	w.csiColor(pair.Fg(), pair.Bg(), pair.Attr())
+	w.stderrInternal(cleanse(text), false)
+	w.csi("m")
+}
+
+func (w *LightWindow) cprint2(fg Color, bg Color, attr Attr, text string) {
+	if w.csiColor(fg, bg, attr) {
+		defer w.csi("m")
+	}
+	w.stderrInternal(cleanse(text), false)
+}
+
+type wrappedLine struct {
+	text         string
+	displayWidth int
+}
+
+func wrapLine(input string, prefixLength int, max int, tabstop int) []wrappedLine {
+	lines := []wrappedLine{}
+	width := 0
+	line := ""
+	for _, r := range input {
+		w := util.RuneWidth(r, prefixLength+width, 8)
+		width += w
+		str := string(r)
+		if r == '\t' {
+			str = repeat(' ', w)
+		}
+		if prefixLength+width <= max {
+			line += str
+		} else {
+			lines = append(lines, wrappedLine{string(line), width - w})
+			line = str
+			prefixLength = 0
+			width = util.RuneWidth(r, prefixLength, 8)
+		}
+	}
+	lines = append(lines, wrappedLine{string(line), width})
+	return lines
+}
+
+func (w *LightWindow) fill(str string, onMove func()) FillReturn {
+	allLines := strings.Split(str, "\n")
+	for i, line := range allLines {
+		lines := wrapLine(line, w.posx, w.width, w.tabstop)
+		for j, wl := range lines {
+			if w.posx >= w.Width()-1 && wl.displayWidth == 0 {
+				if w.posy < w.height-1 {
+					w.Move(w.posy+1, 0)
+				}
+				return FillNextLine
+			}
+			w.stderrInternal(wl.text, false)
+			w.posx += wl.displayWidth
+
+			// Wrap line
+			if j < len(lines)-1 || i < len(allLines)-1 {
+				if w.posy+1 >= w.height {
+					return FillSuspend
+				}
+				w.MoveAndClear(w.posy, w.posx)
+				w.Move(w.posy+1, 0)
+				onMove()
+			}
+		}
+	}
+	return FillContinue
+}
+
+func (w *LightWindow) setBg() {
+	if w.bg != colDefault {
+		w.csiColor(colDefault, w.bg, AttrRegular)
+	}
+}
+
+func (w *LightWindow) Fill(text string) FillReturn {
+	w.Move(w.posy, w.posx)
+	w.setBg()
+	return w.fill(text, w.setBg)
+}
+
+func (w *LightWindow) CFill(fg Color, bg Color, attr Attr, text string) FillReturn {
+	w.Move(w.posy, w.posx)
+	if fg == colDefault {
+		fg = w.fg
+	}
+	if bg == colDefault {
+		bg = w.bg
+	}
+	if w.csiColor(fg, bg, attr) {
+		defer w.csi("m")
+		return w.fill(text, func() { w.csiColor(fg, bg, attr) })
+	}
+	return w.fill(text, w.setBg)
+}
+
+func (w *LightWindow) FinishFill() {
+	w.MoveAndClear(w.posy, w.posx)
+	for y := w.posy + 1; y < w.height; y++ {
+		w.MoveAndClear(y, 0)
+	}
+}
+
+func (w *LightWindow) Erase() {
+	w.drawBorder()
+	// We don't erase the window here to avoid flickering during scroll
+	w.Move(0, 0)
+}

src/tui/light_unix.go

@@ -0,0 +1,110 @@
+// +build !windows
+
+package tui
+
+import (
+	"fmt"
+	"os"
+	"os/exec"
+	"strings"
+	"syscall"
+
+	"github.com/junegunn/fzf/src/util"
+	"golang.org/x/crypto/ssh/terminal"
+)
+
+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 := terminal.GetState(fd)
+	if err != nil {
+		return err
+	}
+	r.origState = origState
+	terminal.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() {
+	terminal.MakeRaw(r.fd())
+}
+
+func (r *LightRenderer) restoreTerminal() {
+	terminal.Restore(r.fd(), r.origState)
+}
+
+func (r *LightRenderer) updateTerminalSize() {
+	width, height, err := terminal.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
+}

src/tui/light_windows.go

@@ -0,0 +1,140 @@
+//+build windows
+
+package tui
+
+import (
+	"os"
+	"syscall"
+
+	"github.com/junegunn/fzf/src/util"
+	"golang.org/x/sys/windows"
+)
+
+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, 12)
+
+	// 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) updateTerminalSize() {
+	var bufferInfo windows.ConsoleScreenBufferInfo
+	if err := windows.GetConsoleScreenBufferInfo(windows.Handle(r.outHandle), &bufferInfo); err != nil {
+		r.width = getEnv("COLUMNS", defaultWidth)
+		r.height = r.maxHeightFunc(getEnv("LINES", defaultHeight))
+
+	} else {
+		r.width = int(bufferInfo.Window.Right - bufferInfo.Window.Left)
+		r.height = r.maxHeightFunc(int(bufferInfo.Window.Bottom - bufferInfo.Window.Top))
+	}
+}
+
+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
+		default:
+			return 0, false
+		}
+	} else {
+		bc := <-r.ttyinChannel
+		return int(bc), true
+	}
+}

src/tui/tcell.go

@@ -0,0 +1,638 @@
+// +build tcell windows
+
+package tui
+
+import (
+	"os"
+	"time"
+	"unicode/utf8"
+
+	"runtime"
+
+	"github.com/gdamore/tcell"
+	"github.com/gdamore/tcell/encoding"
+
+	"github.com/mattn/go-runewidth"
+)
+
+func HasFullscreenRenderer() bool {
+	return true
+}
+
+func (p ColorPair) style() tcell.Style {
+	style := tcell.StyleDefault
+	return style.Foreground(tcell.Color(p.Fg())).Background(tcell.Color(p.Bg()))
+}
+
+type Attr tcell.Style
+
+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
+
+	w.drawBorder()
+}
+
+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)
+	Italic         = Attr(tcell.AttrItalic)
+)
+
+const (
+	AttrUndefined = Attr(0)
+	AttrRegular   = Attr(1 << 7)
+	AttrClear     = Attr(1 << 8)
+)
+
+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
+}
+
+var (
+	_screen tcell.Screen
+)
+
+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) 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) Refresh() {
+	// noop
+}
+
+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:
+		x, y := ev.Position()
+		button := ev.Buttons()
+		mod := ev.Modifiers() != 0
+		if button&tcell.WheelDown != 0 {
+			return Event{Mouse, 0, &MouseEvent{y, x, -1, false, false, false, mod}}
+		} else if button&tcell.WheelUp != 0 {
+			return Event{Mouse, 0, &MouseEvent{y, x, +1, false, false, false, mod}}
+		} else if runtime.GOOS != "windows" {
+			// 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
+			if down {
+				now := time.Now()
+				if !left {
+					r.clickY = []int{}
+				} else if now.Sub(r.prevDownTime) < doubleClickDuration {
+					r.clickY = append(r.clickY, x)
+				} else {
+					r.clickY = []int{x}
+					r.prevDownTime = now
+				}
+			} else {
+				if len(r.clickY) > 1 && r.clickY[0] == r.clickY[1] &&
+					time.Now().Sub(r.prevDownTime) < doubleClickDuration {
+					double = true
+				}
+			}
+
+			return Event{Mouse, 0, &MouseEvent{y, x, 0, left, down, double, mod}}
+		}
+
+		// process keyboard:
+	case *tcell.EventKey:
+		alt := (ev.Modifiers() & tcell.ModAlt) > 0
+		keyfn := func(r rune) int {
+			if alt {
+				return CtrlAltA - 'a' + int(r)
+			}
+			return CtrlA - 'a' + int(r)
+		}
+		switch ev.Key() {
+		case tcell.KeyCtrlA:
+			return Event{keyfn('a'), 0, nil}
+		case tcell.KeyCtrlB:
+			return Event{keyfn('b'), 0, nil}
+		case tcell.KeyCtrlC:
+			return Event{keyfn('c'), 0, nil}
+		case tcell.KeyCtrlD:
+			return Event{keyfn('d'), 0, nil}
+		case tcell.KeyCtrlE:
+			return Event{keyfn('e'), 0, nil}
+		case tcell.KeyCtrlF:
+			return Event{keyfn('f'), 0, nil}
+		case tcell.KeyCtrlG:
+			return Event{keyfn('g'), 0, nil}
+		case tcell.KeyCtrlH:
+			return Event{keyfn('h'), 0, nil}
+		case tcell.KeyCtrlI:
+			return Event{keyfn('i'), 0, nil}
+		case tcell.KeyCtrlJ:
+			return Event{keyfn('j'), 0, nil}
+		case tcell.KeyCtrlK:
+			return Event{keyfn('k'), 0, nil}
+		case tcell.KeyCtrlL:
+			return Event{keyfn('l'), 0, nil}
+		case tcell.KeyCtrlM:
+			return Event{keyfn('m'), 0, nil}
+		case tcell.KeyCtrlN:
+			return Event{keyfn('n'), 0, nil}
+		case tcell.KeyCtrlO:
+			return Event{keyfn('o'), 0, nil}
+		case tcell.KeyCtrlP:
+			return Event{keyfn('p'), 0, nil}
+		case tcell.KeyCtrlQ:
+			return Event{keyfn('q'), 0, nil}
+		case tcell.KeyCtrlR:
+			return Event{keyfn('r'), 0, nil}
+		case tcell.KeyCtrlS:
+			return Event{keyfn('s'), 0, nil}
+		case tcell.KeyCtrlT:
+			return Event{keyfn('t'), 0, nil}
+		case tcell.KeyCtrlU:
+			return Event{keyfn('u'), 0, nil}
+		case tcell.KeyCtrlV:
+			return Event{keyfn('v'), 0, nil}
+		case tcell.KeyCtrlW:
+			return Event{keyfn('w'), 0, nil}
+		case tcell.KeyCtrlX:
+			return Event{keyfn('x'), 0, nil}
+		case tcell.KeyCtrlY:
+			return Event{keyfn('y'), 0, nil}
+		case tcell.KeyCtrlZ:
+			return Event{keyfn('z'), 0, nil}
+		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.KeyCtrlUnderscore:
+			return Event{CtrlSlash, 0, nil}
+		case tcell.KeyBackspace2:
+			if alt {
+				return Event{AltBS, 0, nil}
+			}
+			return Event{BSpace, 0, nil}
+
+		case tcell.KeyUp:
+			if alt {
+				return Event{AltUp, 0, nil}
+			}
+			return Event{Up, 0, nil}
+		case tcell.KeyDown:
+			if alt {
+				return Event{AltDown, 0, nil}
+			}
+			return Event{Down, 0, nil}
+		case tcell.KeyLeft:
+			if alt {
+				return Event{AltLeft, 0, nil}
+			}
+			return Event{Left, 0, nil}
+		case tcell.KeyRight:
+			if alt {
+				return Event{AltRight, 0, nil}
+			}
+			return Event{Right, 0, nil}
+
+		case tcell.KeyInsert:
+			return Event{Insert, 0, nil}
+		case tcell.KeyHome:
+			return Event{Home, 0, nil}
+		case tcell.KeyDelete:
+			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}
+
+		// ev.Ch doesn't work for some reason for space:
+		case tcell.KeyRune:
+			r := ev.Rune()
+			if alt {
+				switch r {
+				case ' ':
+					return Event{AltSpace, 0, nil}
+				case '/':
+					return Event{AltSlash, 0, nil}
+				}
+				if r >= 'a' && r <= 'z' {
+					return Event{AltA + int(r) - 'a', 0, nil}
+				}
+				if r >= '0' && r <= '9' {
+					return Event{Alt0 + int(r) - '0', 0, nil}
+				}
+			}
+			return Event{Rune, r, nil}
+
+		case tcell.KeyEsc:
+			return Event{ESC, 0, nil}
+
+		}
+	}
+
+	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
+	}
+	return &TcellWindow{
+		color:       r.theme.Colored,
+		preview:     preview,
+		top:         top,
+		left:        left,
+		width:       width,
+		height:      height,
+		normal:      normal,
+		borderStyle: borderStyle}
+}
+
+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() {
+	fill(w.left-1, w.top, w.width+1, w.height, w.normal, ' ')
+}
+
+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) {
+	t := text
+	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).
+			Italic(a&Attr(tcell.AttrItalic) != 0).
+			Blink(a&Attr(tcell.AttrBlink) != 0).
+			Dim(a&Attr(tcell.AttrDim) != 0)
+	}
+
+	for {
+		if len(t) == 0 {
+			break
+		}
+		r, size := utf8.DecodeRuneInString(t)
+		t = t[size:]
+
+		if r < rune(' ') { // ignore control characters
+			continue
+		}
+
+		if r == '\n' {
+			w.lastY++
+			lx = 0
+		} else {
+
+			if r == '\u000D' { // skip carriage return
+				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, r, nil, style)
+			}
+			lx += runewidth.RuneWidth(r)
+		}
+	}
+	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).
+		Italic(a&Attr(tcell.AttrItalic) != 0)
+
+	for _, r := range text {
+		if r == '\n' {
+			w.lastY++
+			w.lastX = 0
+			lx = 0
+		} else {
+			var xPos = w.left + w.lastX + lx
+
+			// word wrap:
+			if xPos >= (w.left + w.width) {
+				w.lastY++
+				w.lastX = 0
+				lx = 0
+				xPos = w.left
+			}
+			var yPos = w.top + w.lastY
+
+			if yPos >= (w.top + w.height) {
+				return FillSuspend
+			}
+
+			_screen.SetContent(xPos, yPos, r, nil, style)
+			lx += runewidth.RuneWidth(r)
+		}
+	}
+	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() {
+	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()
+	}
+
+	switch shape {
+	case BorderRounded, BorderSharp, BorderHorizontal, BorderTop:
+		for x := left; x < right; x++ {
+			_screen.SetContent(x, top, w.borderStyle.horizontal, nil, style)
+		}
+	}
+	switch shape {
+	case BorderRounded, BorderSharp, BorderHorizontal, BorderBottom:
+		for x := left; x < right; x++ {
+			_screen.SetContent(x, bot-1, w.borderStyle.horizontal, nil, style)
+		}
+	}
+	switch shape {
+	case BorderRounded, BorderSharp, BorderVertical, BorderLeft:
+		for y := top; y < bot; y++ {
+			_screen.SetContent(left, y, w.borderStyle.vertical, nil, style)
+		}
+	}
+	switch shape {
+	case BorderRounded, BorderSharp, BorderVertical, BorderRight:
+		for y := top; y < bot; y++ {
+			_screen.SetContent(right-1, y, w.borderStyle.vertical, nil, style)
+		}
+	}
+	switch shape {
+	case BorderRounded, BorderSharp:
+		_screen.SetContent(left, top, w.borderStyle.topLeft, nil, style)
+		_screen.SetContent(right-1, top, w.borderStyle.topRight, nil, style)
+		_screen.SetContent(left, bot-1, w.borderStyle.bottomLeft, nil, style)
+		_screen.SetContent(right-1, bot-1, w.borderStyle.bottomRight, nil, style)
+	}
+}

src/tui/ttyname_unix.go

@@ -0,0 +1,31 @@
+// +build !windows
+
+package tui
+
+import (
+	"io/ioutil"
+	"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 := ioutil.ReadDir(prefix)
+		if err != nil {
+			continue
+		}
+
+		for _, file := range files {
+			if stat, ok := file.Sys().(*syscall.Stat_t); ok && stat.Rdev == stderr.Rdev {
+				return prefix + file.Name()
+			}
+		}
+	}
+	return ""
+}

src/tui/ttyname_windows.go

@@ -0,0 +1,7 @@
+// +build windows
+
+package tui
+
+func ttyname() string {
+	return ""
+}

src/tui/tui.go

@@ -0,0 +1,581 @@
+package tui
+
+import (
+	"fmt"
+	"os"
+	"strconv"
+	"time"
+)
+
+// 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
+	CtrlSpace
+
+	// 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
+
+	BTab
+	BSpace
+
+	Del
+	PgUp
+	PgDn
+
+	Up
+	Down
+	Left
+	Right
+	Home
+	End
+	Insert
+
+	SUp
+	SDown
+	SLeft
+	SRight
+
+	F1
+	F2
+	F3
+	F4
+	F5
+	F6
+	F7
+	F8
+	F9
+	F10
+	F11
+	F12
+
+	Change
+	BackwardEOF
+
+	AltSpace
+	AltSlash
+	AltBS
+
+	AltUp
+	AltDown
+	AltLeft
+	AltRight
+
+	Alt0
+)
+
+const ( // Reset iota
+	AltA = Alt0 + 'a' - '0' + iota
+	AltB
+	AltC
+	AltD
+	AltE
+	AltF
+	AltZ     = AltA + 'z' - 'a'
+	CtrlAltA = AltZ + 1
+	CtrlAltM = CtrlAltA + 'm' - 'a'
+)
+
+const (
+	doubleClickDuration = 500 * time.Millisecond
+)
+
+type Color int32
+
+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) 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
+	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
+	Border       ColorAttr
+}
+
+type Event struct {
+	Type       int
+	Char       rune
+	MouseEvent *MouseEvent
+}
+
+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
+	BorderHorizontal
+	BorderVertical
+	BorderTop
+	BorderBottom
+	BorderLeft
+	BorderRight
+)
+
+type BorderStyle struct {
+	shape       BorderShape
+	horizontal  rune
+	vertical    rune
+	topLeft     rune
+	topRight    rune
+	bottomLeft  rune
+	bottomRight rune
+}
+
+type BorderCharacter int
+
+func MakeBorderStyle(shape BorderShape, unicode bool) BorderStyle {
+	if unicode {
+		if shape == BorderRounded {
+			return BorderStyle{
+				shape:       shape,
+				horizontal:  '─',
+				vertical:    '│',
+				topLeft:     '╭',
+				topRight:    '╮',
+				bottomLeft:  '╰',
+				bottomRight: '╯',
+			}
+		}
+		return BorderStyle{
+			shape:       shape,
+			horizontal:  '─',
+			vertical:    '│',
+			topLeft:     '┌',
+			topRight:    '┐',
+			bottomLeft:  '└',
+			bottomRight: '┘',
+		}
+	}
+	return BorderStyle{
+		shape:       shape,
+		horizontal:  '-',
+		vertical:    '|',
+		topLeft:     '+',
+		topRight:    '+',
+		bottomLeft:  '+',
+		bottomRight: '+',
+	}
+}
+
+func MakeTransparentBorder() BorderStyle {
+	return BorderStyle{
+		shape:       BorderRounded,
+		horizontal:  ' ',
+		vertical:    ' ',
+		topLeft:     ' ',
+		topRight:    ' ',
+		bottomLeft:  ' ',
+		bottomRight: ' '}
+}
+
+type Renderer interface {
+	Init()
+	Pause(clear bool)
+	Resume(clear bool, sigcont bool)
+	Clear()
+	RefreshWindows(windows []Window)
+	Refresh()
+	Close()
+
+	GetChar() Event
+
+	MaxX() int
+	MaxY() int
+
+	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
+
+	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()
+}
+
+type FullscreenRenderer struct {
+	theme        *ColorTheme
+	mouse        bool
+	forceBlack   bool
+	prevDownTime time.Time
+	clickY       []int
+}
+
+func NewFullscreenRenderer(theme *ColorTheme, forceBlack bool, mouse bool) Renderer {
+	r := &FullscreenRenderer{
+		theme:        theme,
+		mouse:        mouse,
+		forceBlack:   forceBlack,
+		prevDownTime: time.Unix(0, 0),
+		clickY:       []int{}}
+	return r
+}
+
+var (
+	Default16 *ColorTheme
+	Dark256   *ColorTheme
+	Light256  *ColorTheme
+
+	ColPrompt               ColorPair
+	ColNormal               ColorPair
+	ColInput                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
+	ColBorder               ColorPair
+	ColPreview              ColorPair
+	ColPreviewBorder        ColorPair
+)
+
+func EmptyTheme() *ColorTheme {
+	return &ColorTheme{
+		Colored:      true,
+		Input:        ColorAttr{colUndefined, AttrUndefined},
+		Fg:           ColorAttr{colUndefined, AttrUndefined},
+		Bg:           ColorAttr{colUndefined, AttrUndefined},
+		PreviewFg:    ColorAttr{colUndefined, AttrUndefined},
+		PreviewBg:    ColorAttr{colUndefined, AttrUndefined},
+		DarkBg:       ColorAttr{colUndefined, AttrUndefined},
+		Gutter:       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}}
+}
+
+func NoColorTheme() *ColorTheme {
+	return &ColorTheme{
+		Colored:      false,
+		Input:        ColorAttr{colDefault, AttrRegular},
+		Fg:           ColorAttr{colDefault, AttrRegular},
+		Bg:           ColorAttr{colDefault, AttrRegular},
+		PreviewFg:    ColorAttr{colDefault, AttrRegular},
+		PreviewBg:    ColorAttr{colDefault, AttrRegular},
+		DarkBg:       ColorAttr{colDefault, AttrRegular},
+		Gutter:       ColorAttr{colDefault, AttrRegular},
+		Prompt:       ColorAttr{colDefault, AttrRegular},
+		Match:        ColorAttr{colDefault, Underline},
+		Current:      ColorAttr{colDefault, Reverse},
+		CurrentMatch: ColorAttr{colDefault, Reverse | Underline},
+		Spinner:      ColorAttr{colDefault, AttrRegular},
+		Info:         ColorAttr{colDefault, AttrRegular},
+		Cursor:       ColorAttr{colDefault, AttrRegular},
+		Selected:     ColorAttr{colDefault, AttrRegular},
+		Header:       ColorAttr{colDefault, AttrRegular},
+		Border:       ColorAttr{colDefault, AttrRegular}}
+}
+
+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},
+		PreviewFg:    ColorAttr{colUndefined, AttrUndefined},
+		PreviewBg:    ColorAttr{colUndefined, AttrUndefined},
+		DarkBg:       ColorAttr{colBlack, AttrUndefined},
+		Gutter:       ColorAttr{colUndefined, 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}}
+	Dark256 = &ColorTheme{
+		Colored:      true,
+		Input:        ColorAttr{colDefault, AttrUndefined},
+		Fg:           ColorAttr{colDefault, AttrUndefined},
+		Bg:           ColorAttr{colDefault, AttrUndefined},
+		PreviewFg:    ColorAttr{colUndefined, AttrUndefined},
+		PreviewBg:    ColorAttr{colUndefined, AttrUndefined},
+		DarkBg:       ColorAttr{236, AttrUndefined},
+		Gutter:       ColorAttr{colUndefined, 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}}
+	Light256 = &ColorTheme{
+		Colored:      true,
+		Input:        ColorAttr{colDefault, AttrUndefined},
+		Fg:           ColorAttr{colDefault, AttrUndefined},
+		Bg:           ColorAttr{colDefault, AttrUndefined},
+		PreviewFg:    ColorAttr{colUndefined, AttrUndefined},
+		PreviewBg:    ColorAttr{colUndefined, AttrUndefined},
+		DarkBg:       ColorAttr{251, AttrUndefined},
+		Gutter:       ColorAttr{colUndefined, 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}}
+}
+
+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.PreviewFg = o(theme.Fg, o(baseTheme.PreviewFg, theme.PreviewFg))
+	theme.PreviewBg = o(theme.Bg, o(baseTheme.PreviewBg, theme.PreviewBg))
+	theme.DarkBg = o(baseTheme.DarkBg, theme.DarkBg)
+	theme.Gutter = o(theme.DarkBg, o(baseTheme.Gutter, theme.Gutter))
+	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)
+
+	initPalette(theme)
+}
+
+func initPalette(theme *ColorTheme) {
+	pair := func(fg, bg ColorAttr) ColorPair {
+		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)
+	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)
+	ColBorder = pair(theme.Border, theme.Bg)
+	ColPreview = pair(theme.PreviewFg, theme.PreviewBg)
+	ColPreviewBorder = pair(theme.Border, theme.PreviewBg)
+}

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/util/atomicbool.go

@@ -0,0 +1,34 @@
+package util
+
+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 {
+	state int32 // "1" is true, "0" is false
+}
+
+// NewAtomicBool returns a new AtomicBool
+func NewAtomicBool(initialState bool) *AtomicBool {
+	return &AtomicBool{state: convertBoolToInt32(initialState)}
+}
+
+// Get returns the current boolean value synchronously
+func (a *AtomicBool) Get() bool {
+	return atomic.LoadInt32(&a.state) == 1
+}
+
+// Set updates the boolean value synchronously
+func (a *AtomicBool) Set(newState bool) bool {
+	atomic.StoreInt32(&a.state, convertBoolToInt32(newState))
+	return newState
+}

src/util/atomicbool_test.go

@@ -0,0 +1,17 @@
+package util
+
+import "testing"
+
+func TestAtomicBool(t *testing.T) {
+	if !NewAtomicBool(true).Get() || NewAtomicBool(false).Get() {
+		t.Error("Invalid initial value")
+	}
+
+	ab := NewAtomicBool(true)
+	if ab.Set(false) {
+		t.Error("Invalid return value")
+	}
+	if ab.Get() {
+		t.Error("Invalid state")
+	}
+}

src/util/chars.go

@@ -0,0 +1,198 @@
+package util
+
+import (
+	"fmt"
+	"unicode"
+	"unicode/utf8"
+	"unsafe"
+)
+
+const (
+	overflow64 uint64 = 0x8080808080808080
+	overflow32 uint32 = 0x80808080
+)
+
+type Chars struct {
+	slice           []byte // or []rune
+	inBytes         bool
+	trimLengthKnown bool
+	trimLength      uint16
+
+	// XXX Piggybacking item index here is a horrible idea. But I'm trying to
+	// minimize the memory footprint by not wasting padded spaces.
+	Index int32
+}
+
+func checkAscii(bytes []byte) (bool, int) {
+	i := 0
+	for ; i <= len(bytes)-8; i += 8 {
+		if (overflow64 & *(*uint64)(unsafe.Pointer(&bytes[i]))) > 0 {
+			return false, i
+		}
+	}
+	for ; i <= len(bytes)-4; i += 4 {
+		if (overflow32 & *(*uint32)(unsafe.Pointer(&bytes[i]))) > 0 {
+			return false, i
+		}
+	}
+	for ; i < len(bytes); i++ {
+		if bytes[i] >= utf8.RuneSelf {
+			return false, i
+		}
+	}
+	return true, 0
+}
+
+// ToChars converts byte array into rune array
+func ToChars(bytes []byte) Chars {
+	inBytes, bytesUntil := checkAscii(bytes)
+	if inBytes {
+		return Chars{slice: bytes, inBytes: inBytes}
+	}
+
+	runes := make([]rune, bytesUntil, len(bytes))
+	for i := 0; i < bytesUntil; i++ {
+		runes[i] = rune(bytes[i])
+	}
+	for i := bytesUntil; i < len(bytes); {
+		r, sz := utf8.DecodeRune(bytes[i:])
+		i += sz
+		runes = append(runes, r)
+	}
+	return RunesToChars(runes)
+}
+
+func RunesToChars(runes []rune) Chars {
+	return Chars{slice: *(*[]byte)(unsafe.Pointer(&runes)), inBytes: false}
+}
+
+func (chars *Chars) IsBytes() bool {
+	return chars.inBytes
+}
+
+func (chars *Chars) Bytes() []byte {
+	return chars.slice
+}
+
+func (chars *Chars) optionalRunes() []rune {
+	if chars.inBytes {
+		return nil
+	}
+	return *(*[]rune)(unsafe.Pointer(&chars.slice))
+}
+
+func (chars *Chars) Get(i int) rune {
+	if runes := chars.optionalRunes(); runes != nil {
+		return runes[i]
+	}
+	return rune(chars.slice[i])
+}
+
+func (chars *Chars) Length() int {
+	if runes := chars.optionalRunes(); runes != nil {
+		return len(runes)
+	}
+	return len(chars.slice)
+}
+
+// String returns the string representation of a Chars object.
+func (chars *Chars) String() string {
+	return fmt.Sprintf("Chars{slice: []byte(%q), inBytes: %v, trimLengthKnown: %v, trimLength: %d, Index: %d}", chars.slice, chars.inBytes, chars.trimLengthKnown, chars.trimLength, chars.Index)
+}
+
+// TrimLength returns the length after trimming leading and trailing whitespaces
+func (chars *Chars) TrimLength() uint16 {
+	if chars.trimLengthKnown {
+		return chars.trimLength
+	}
+	chars.trimLengthKnown = true
+	var i int
+	len := chars.Length()
+	for i = len - 1; i >= 0; i-- {
+		char := chars.Get(i)
+		if !unicode.IsSpace(char) {
+			break
+		}
+	}
+	// Completely empty
+	if i < 0 {
+		return 0
+	}
+
+	var j int
+	for j = 0; j < len; j++ {
+		char := chars.Get(j)
+		if !unicode.IsSpace(char) {
+			break
+		}
+	}
+	chars.trimLength = AsUint16(i - j + 1)
+	return chars.trimLength
+}
+
+func (chars *Chars) LeadingWhitespaces() int {
+	whitespaces := 0
+	for i := 0; i < chars.Length(); i++ {
+		char := chars.Get(i)
+		if !unicode.IsSpace(char) {
+			break
+		}
+		whitespaces++
+	}
+	return whitespaces
+}
+
+func (chars *Chars) TrailingWhitespaces() int {
+	whitespaces := 0
+	for i := chars.Length() - 1; i >= 0; i-- {
+		char := chars.Get(i)
+		if !unicode.IsSpace(char) {
+			break
+		}
+		whitespaces++
+	}
+	return whitespaces
+}
+
+func (chars *Chars) TrimTrailingWhitespaces() {
+	whitespaces := chars.TrailingWhitespaces()
+	chars.slice = chars.slice[0 : len(chars.slice)-whitespaces]
+}
+
+func (chars *Chars) ToString() string {
+	if runes := chars.optionalRunes(); runes != nil {
+		return string(runes)
+	}
+	return string(chars.slice)
+}
+
+func (chars *Chars) ToRunes() []rune {
+	if runes := chars.optionalRunes(); runes != nil {
+		return runes
+	}
+	bytes := chars.slice
+	runes := make([]rune, len(bytes))
+	for idx, b := range bytes {
+		runes[idx] = rune(b)
+	}
+	return runes
+}
+
+func (chars *Chars) CopyRunes(dest []rune) {
+	if runes := chars.optionalRunes(); runes != nil {
+		copy(dest, runes)
+		return
+	}
+	for idx, b := range chars.slice[:len(dest)] {
+		dest[idx] = rune(b)
+	}
+}
+
+func (chars *Chars) Prepend(prefix string) {
+	if runes := chars.optionalRunes(); runes != nil {
+		runes = append([]rune(prefix), runes...)
+		chars.slice = *(*[]byte)(unsafe.Pointer(&runes))
+	} else {
+		chars.slice = append([]byte(prefix), chars.slice...)
+	}
+}

src/util/chars_test.go

@@ -0,0 +1,46 @@
+package util
+
+import "testing"
+
+func TestToCharsAscii(t *testing.T) {
+	chars := ToChars([]byte("foobar"))
+	if !chars.inBytes || chars.ToString() != "foobar" || !chars.inBytes {
+		t.Error()
+	}
+}
+
+func TestCharsLength(t *testing.T) {
+	chars := ToChars([]byte("\tabc한글  "))
+	if chars.inBytes || chars.Length() != 8 || chars.TrimLength() != 5 {
+		t.Error()
+	}
+}
+
+func TestCharsToString(t *testing.T) {
+	text := "\tabc한글  "
+	chars := ToChars([]byte(text))
+	if chars.ToString() != text {
+		t.Error()
+	}
+}
+
+func TestTrimLength(t *testing.T) {
+	check := func(str string, exp uint16) {
+		chars := ToChars([]byte(str))
+		trimmed := chars.TrimLength()
+		if trimmed != exp {
+			t.Errorf("Invalid TrimLength result for '%s': %d (expected %d)",
+				str, trimmed, exp)
+		}
+	}
+	check("hello", 5)
+	check("hello ", 5)
+	check("hello  ", 5)
+	check(" hello", 5)
+	check("  hello", 5)
+	check(" hello ", 5)
+	check("  hello  ", 5)
+	check("h   o", 5)
+	check("  h   o  ", 5)
+	check("         ", 0)
+}

src/util/eventbox.go

@@ -0,0 +1,96 @@
+package util
+
+import "sync"
+
+// EventType is the type for fzf events
+type EventType int
+
+// Events is a type that associates EventType to any data
+type Events map[EventType]interface{}
+
+// EventBox is used for coordinating events
+type EventBox struct {
+	events Events
+	cond   *sync.Cond
+	ignore map[EventType]bool
+}
+
+// NewEventBox returns a new EventBox
+func NewEventBox() *EventBox {
+	return &EventBox{
+		events: make(Events),
+		cond:   sync.NewCond(&sync.Mutex{}),
+		ignore: make(map[EventType]bool)}
+}
+
+// Wait blocks the goroutine until signaled
+func (b *EventBox) Wait(callback func(*Events)) {
+	b.cond.L.Lock()
+
+	if len(b.events) == 0 {
+		b.cond.Wait()
+	}
+
+	callback(&b.events)
+	b.cond.L.Unlock()
+}
+
+// Set turns on the event type on the box
+func (b *EventBox) Set(event EventType, value interface{}) {
+	b.cond.L.Lock()
+	b.events[event] = value
+	if _, found := b.ignore[event]; !found {
+		b.cond.Broadcast()
+	}
+	b.cond.L.Unlock()
+}
+
+// Clear clears the events
+// Unsynchronized; should be called within Wait routine
+func (events *Events) Clear() {
+	for event := range *events {
+		delete(*events, event)
+	}
+}
+
+// Peek peeks at the event box if the given event is set
+func (b *EventBox) Peek(event EventType) bool {
+	b.cond.L.Lock()
+	_, ok := b.events[event]
+	b.cond.L.Unlock()
+	return ok
+}
+
+// Watch deletes the events from the ignore list
+func (b *EventBox) Watch(events ...EventType) {
+	b.cond.L.Lock()
+	for _, event := range events {
+		delete(b.ignore, event)
+	}
+	b.cond.L.Unlock()
+}
+
+// Unwatch adds the events to the ignore list
+func (b *EventBox) Unwatch(events ...EventType) {
+	b.cond.L.Lock()
+	for _, event := range events {
+		b.ignore[event] = true
+	}
+	b.cond.L.Unlock()
+}
+
+// WaitFor blocks the execution until the event is received
+func (b *EventBox) WaitFor(event EventType) {
+	looping := true
+	for looping {
+		b.Wait(func(events *Events) {
+			for evt := range *events {
+				switch evt {
+				case event:
+					looping = false
+					return
+				}
+			}
+		})
+	}
+}

src/util/eventbox_test.go

@@ -0,0 +1,61 @@
+package util
+
+import "testing"
+
+// fzf events
+const (
+	EvtReadNew EventType = iota
+	EvtReadFin
+	EvtSearchNew
+	EvtSearchProgress
+	EvtSearchFin
+	EvtClose
+)
+
+func TestEventBox(t *testing.T) {
+	eb := NewEventBox()
+
+	// Wait should return immediately
+	ch := make(chan bool)
+
+	go func() {
+		eb.Set(EvtReadNew, 10)
+		ch <- true
+		<-ch
+		eb.Set(EvtSearchNew, 10)
+		eb.Set(EvtSearchNew, 15)
+		eb.Set(EvtSearchNew, 20)
+		eb.Set(EvtSearchProgress, 30)
+		ch <- true
+		<-ch
+		eb.Set(EvtSearchFin, 40)
+		ch <- true
+		<-ch
+	}()
+
+	count := 0
+	sum := 0
+	looping := true
+	for looping {
+		<-ch
+		eb.Wait(func(events *Events) {
+			for _, value := range *events {
+				switch val := value.(type) {
+				case int:
+					sum += val
+					looping = sum < 100
+				}
+			}
+			events.Clear()
+		})
+		ch <- true
+		count++
+	}
+
+	if count != 3 {
+		t.Error("Invalid number of events", count)
+	}
+	if sum != 100 {
+		t.Error("Invalid sum", sum)
+	}
+}

src/util/slab.go

@@ -0,0 +1,12 @@
+package util
+
+type Slab struct {
+	I16 []int16
+	I32 []int32
+}
+
+func MakeSlab(size16 int, size32 int) *Slab {
+	return &Slab{
+		I16: make([]int16, size16),
+		I32: make([]int32, size32)}
+}

src/util/util.go

@@ -0,0 +1,124 @@
+package util
+
+import (
+	"math"
+	"os"
+	"time"
+
+	"github.com/mattn/go-isatty"
+	"github.com/mattn/go-runewidth"
+)
+
+var _runeWidths = make(map[rune]int)
+
+// RuneWidth returns rune width
+func RuneWidth(r rune, prefixWidth int, tabstop int) int {
+	if r == '\t' {
+		return tabstop - prefixWidth%tabstop
+	} else if w, found := _runeWidths[r]; found {
+		return w
+	} else if r == '\n' || r == '\r' {
+		return 1
+	}
+	w := runewidth.RuneWidth(r)
+	_runeWidths[r] = w
+	return w
+}
+
+// Max returns the largest integer
+func Max(first int, second int) int {
+	if first >= second {
+		return first
+	}
+	return second
+}
+
+// Max16 returns the largest integer
+func Max16(first int16, second int16) int16 {
+	if first >= second {
+		return first
+	}
+	return second
+}
+
+// Max32 returns the largest 32-bit integer
+func Max32(first int32, second int32) int32 {
+	if first > second {
+		return first
+	}
+	return second
+}
+
+// Min returns the smallest integer
+func Min(first int, second int) int {
+	if first <= second {
+		return first
+	}
+	return second
+}
+
+// Min32 returns the smallest 32-bit integer
+func Min32(first int32, second int32) int32 {
+	if first <= second {
+		return first
+	}
+	return second
+}
+
+// Constrain32 limits the given 32-bit integer with the upper and lower bounds
+func Constrain32(val int32, min int32, max int32) int32 {
+	if val < min {
+		return min
+	}
+	if val > max {
+		return max
+	}
+	return val
+}
+
+// Constrain limits the given integer with the upper and lower bounds
+func Constrain(val int, min int, max int) int {
+	if val < min {
+		return min
+	}
+	if val > max {
+		return max
+	}
+	return val
+}
+
+func AsUint16(val int) uint16 {
+	if val > math.MaxUint16 {
+		return math.MaxUint16
+	} else if val < 0 {
+		return 0
+	}
+	return uint16(val)
+}
+
+// DurWithin limits the given time.Duration with the upper and lower bounds
+func DurWithin(
+	val time.Duration, min time.Duration, max time.Duration) time.Duration {
+	if val < min {
+		return min
+	}
+	if val > max {
+		return max
+	}
+	return val
+}
+
+// IsTty returns true is stdin is a terminal
+func IsTty() bool {
+	return isatty.IsTerminal(os.Stdin.Fd())
+}
+
+// Once returns a function that returns the specified boolean value only once
+func Once(nextResponse bool) func() bool {
+	state := nextResponse
+	return func() bool {
+		prevState := state
+		state = false
+		return prevState
+	}
+}

src/util/util_test.go

@@ -0,0 +1,40 @@
+package util
+
+import "testing"
+
+func TestMax(t *testing.T) {
+	if Max(-2, 5) != 5 {
+		t.Error("Invalid result")
+	}
+}
+
+func TestContrain(t *testing.T) {
+	if Constrain(-3, -1, 3) != -1 {
+		t.Error("Expected", -1)
+	}
+	if Constrain(2, -1, 3) != 2 {
+		t.Error("Expected", 2)
+	}
+
+	if Constrain(5, -1, 3) != 3 {
+		t.Error("Expected", 3)
+	}
+}
+
+func TestOnce(t *testing.T) {
+	o := Once(false)
+	if o() {
+		t.Error("Expected: false")
+	}
+	if o() {
+		t.Error("Expected: false")
+	}
+
+	o = Once(true)
+	if !o() {
+		t.Error("Expected: true")
+	}
+	if o() {
+		t.Error("Expected: false")
+	}
+}

src/util/util_unix.go

@@ -0,0 +1,47 @@
+// +build !windows
+
+package util
+
+import (
+	"os"
+	"os/exec"
+	"syscall"
+)
+
+// ExecCommand executes the given command with $SHELL
+func ExecCommand(command string, setpgid bool) *exec.Cmd {
+	shell := os.Getenv("SHELL")
+	if len(shell) == 0 {
+		shell = "sh"
+	}
+	return ExecCommandWith(shell, command, setpgid)
+}
+
+// ExecCommandWith executes the given command with the specified shell
+func ExecCommandWith(shell string, command string, setpgid bool) *exec.Cmd {
+	cmd := exec.Command(shell, "-c", command)
+	if setpgid {
+		cmd.SysProcAttr = &syscall.SysProcAttr{Setpgid: true}
+	}
+	return cmd
+}
+
+// KillCommand kills the process for the given command
+func KillCommand(cmd *exec.Cmd) error {
+	return syscall.Kill(-cmd.Process.Pid, syscall.SIGKILL)
+}
+
+// IsWindows returns true on Windows
+func IsWindows() bool {
+	return false
+}
+
+// SetNonblock executes syscall.SetNonblock on file descriptor
+func SetNonblock(file *os.File, nonblock bool) {
+	syscall.SetNonblock(int(file.Fd()), nonblock)
+}
+
+// Read executes syscall.Read on file descriptor
+func Read(fd int, b []byte) (int, error) {
+	return syscall.Read(int(fd), b)
+}

src/util/util_windows.go

@@ -0,0 +1,49 @@
+// +build windows
+
+package util
+
+import (
+	"fmt"
+	"os"
+	"os/exec"
+	"syscall"
+)
+
+// ExecCommand executes the given command with cmd
+func ExecCommand(command string, setpgid bool) *exec.Cmd {
+	return ExecCommandWith("cmd", command, setpgid)
+}
+
+// ExecCommandWith executes the given command with cmd. _shell parameter is
+// ignored on Windows.
+// FIXME: setpgid is unused. We set it in the Unix implementation so that we
+// can kill preview process with its child processes at once.
+func ExecCommandWith(_shell string, command string, setpgid bool) *exec.Cmd {
+	cmd := exec.Command("cmd")
+	cmd.SysProcAttr = &syscall.SysProcAttr{
+		HideWindow:    false,
+		CmdLine:       fmt.Sprintf(` /v:on/s/c "%s"`, command),
+		CreationFlags: 0,
+	}
+	return cmd
+}
+
+// KillCommand kills the process for the given command
+func KillCommand(cmd *exec.Cmd) error {
+	return cmd.Process.Kill()
+}
+
+// IsWindows returns true on Windows
+func IsWindows() bool {
+	return true
+}
+
+// SetNonblock executes syscall.SetNonblock on file descriptor
+func SetNonblock(file *os.File, nonblock bool) {
+	syscall.SetNonblock(syscall.Handle(file.Fd()), nonblock)
+}
+
+// Read executes syscall.Read on file descriptor
+func Read(fd int, b []byte) (int, error) {
+	return syscall.Read(syscall.Handle(fd), b)
+}

test/fzf.vader

@@ -0,0 +1,175 @@
+Execute (Setup):
+  let g:dir = fnamemodify(g:vader_file, ':p:h')
+  unlet! g:fzf_layout g:fzf_action g:fzf_history_dir
+  Log 'Test directory: ' . g:dir
+  Save &acd
+
+Execute (fzf#run with dir option):
+  let cwd = getcwd()
+  let result = fzf#run({ 'source': 'git ls-files', 'options': '--filter=vdr', 'dir': g:dir })
+  AssertEqual ['fzf.vader'], result
+  AssertEqual 0, haslocaldir()
+  AssertEqual getcwd(), cwd
+
+  execute 'lcd' fnameescape(cwd)
+  let result = sort(fzf#run({ 'source': 'git ls-files', 'options': '--filter e', 'dir': g:dir }))
+  AssertEqual ['fzf.vader', 'test_go.rb'], result
+  AssertEqual 1, haslocaldir()
+  AssertEqual getcwd(), cwd
+
+Execute (fzf#run with Funcref command):
+  let g:ret = []
+  function! g:FzfTest(e)
+    call add(g:ret, a:e)
+  endfunction
+  let result = sort(fzf#run({ 'source': 'git ls-files', 'sink': function('g:FzfTest'), 'options': '--filter e', 'dir': g:dir }))
+  AssertEqual ['fzf.vader', 'test_go.rb'], result
+  AssertEqual ['fzf.vader', 'test_go.rb'], sort(g:ret)
+
+Execute (fzf#run with string source):
+  let result = sort(fzf#run({ 'source': 'echo hi', 'options': '-f i' }))
+  AssertEqual ['hi'], result
+
+Execute (fzf#run with list source):
+  let result = sort(fzf#run({ 'source': ['hello', 'world'], 'options': '-f e' }))
+  AssertEqual ['hello'], result
+  let result = sort(fzf#run({ 'source': ['hello', 'world'], 'options': '-f o' }))
+  AssertEqual ['hello', 'world'], result
+
+Execute (fzf#run with string source):
+  let result = sort(fzf#run({ 'source': 'echo hi', 'options': '-f i' }))
+  AssertEqual ['hi'], result
+
+Execute (fzf#run with dir option and noautochdir):
+  set noacd
+  let cwd = getcwd()
+  call fzf#run({'source': ['/foobar'], 'sink': 'e', 'dir': '/tmp', 'options': '-1'})
+  " No change in working directory
+  AssertEqual cwd, getcwd()
+
+  call fzf#run({'source': ['/foobar'], 'sink': 'tabe', 'dir': '/tmp', 'options': '-1'})
+  AssertEqual cwd, getcwd()
+  tabclose
+  AssertEqual cwd, getcwd()
+
+Execute (Incomplete fzf#run with dir option and autochdir):
+  set acd
+  let cwd = getcwd()
+  call fzf#run({'source': [], 'sink': 'e', 'dir': '/tmp', 'options': '-0'})
+  " No change in working directory even if &acd is set
+  AssertEqual cwd, getcwd()
+
+Execute (FIXME: fzf#run with dir option and autochdir):
+  set acd
+  call fzf#run({'source': ['/foobar'], 'sink': 'e', 'dir': '/tmp', 'options': '-1'})
+  " Working directory changed due to &acd
+  AssertEqual '/foobar', expand('%')
+  AssertEqual '/', getcwd()
+
+Execute (fzf#run with dir option and autochdir when final cwd is same as dir):
+  set acd
+  cd /tmp
+  call fzf#run({'source': ['/foobar'], 'sink': 'e', 'dir': '/', 'options': '-1'})
+  " Working directory changed due to &acd
+  AssertEqual '/', getcwd()
+
+Execute (fzf#wrap):
+  AssertThrows fzf#wrap({'foo': 'bar'})
+
+  let opts = fzf#wrap('foobar')
+  Log opts
+  AssertEqual '~40%', opts.down
+  Assert opts.options =~ '--expect='
+  Assert !has_key(opts, 'sink')
+  Assert has_key(opts, 'sink*')
+
+  let opts = fzf#wrap('foobar', {}, 0)
+  Log opts
+  AssertEqual '~40%', opts.down
+
+  let opts = fzf#wrap('foobar', {}, 1)
+  Log opts
+  Assert !has_key(opts, 'down')
+
+  let opts = fzf#wrap('foobar', {'down': '50%'})
+  Log opts
+  AssertEqual '50%', opts.down
+
+  let opts = fzf#wrap('foobar', {'down': '50%'}, 1)
+  Log opts
+  Assert !has_key(opts, 'down')
+
+  let opts = fzf#wrap('foobar', {'sink': 'e'})
+  Log opts
+  AssertEqual 'e', opts.sink
+  Assert !has_key(opts, 'sink*')
+
+  let opts = fzf#wrap('foobar', {'options': '--reverse'})
+  Log opts
+  Assert opts.options =~ '--expect='
+  Assert opts.options =~ '--reverse'
+
+  let g:fzf_layout = {'window': 'enew'}
+  let opts = fzf#wrap('foobar')
+  Log opts
+  AssertEqual 'enew', opts.window
+
+  let opts = fzf#wrap('foobar', {}, 1)
+  Log opts
+  Assert !has_key(opts, 'window')
+
+  let opts = fzf#wrap('foobar', {'right': '50%'})
+  Log opts
+  Assert !has_key(opts, 'window')
+  AssertEqual '50%', opts.right
+
+  let opts = fzf#wrap('foobar', {'right': '50%'}, 1)
+  Log opts
+  Assert !has_key(opts, 'window')
+  Assert !has_key(opts, 'right')
+
+  let g:fzf_action = {'a': 'tabe'}
+  let opts = fzf#wrap('foobar')
+  Log opts
+  Assert opts.options =~ '--expect=a'
+  Assert !has_key(opts, 'sink')
+  Assert has_key(opts, 'sink*')
+
+  let opts = fzf#wrap('foobar', {'sink': 'e'})
+  Log opts
+  AssertEqual 'e', opts.sink
+  Assert !has_key(opts, 'sink*')
+
+  let g:fzf_history_dir = '/tmp'
+  let opts = fzf#wrap('foobar', {'options': '--color light'})
+  Log opts
+  Assert opts.options =~ "--history '/tmp/foobar'"
+  Assert opts.options =~ '--color light'
+
+  let g:fzf_colors = { 'fg': ['fg', 'Error'] }
+  let opts = fzf#wrap({})
+  Assert opts.options =~ '^--color=fg:'
+
+Execute (fzf#shellescape with sh):
+  AssertEqual '''''', fzf#shellescape('', 'sh')
+  AssertEqual '''\''', fzf#shellescape('\', 'sh')
+  AssertEqual '''""''', fzf#shellescape('""', 'sh')
+  AssertEqual '''foobar>''', fzf#shellescape('foobar>', 'sh')
+  AssertEqual '''\\\"\\\''', fzf#shellescape('\\\"\\\', 'sh')
+  AssertEqual '''echo ''\''''a''\'''' && echo ''\''''b''\''''''', fzf#shellescape('echo ''a'' && echo ''b''', 'sh')
+
+Execute (fzf#shellescape with cmd.exe):
+  AssertEqual '^"^"', fzf#shellescape('', 'cmd.exe')
+  AssertEqual '^"\\^"', fzf#shellescape('\', 'cmd.exe')
+  AssertEqual '^"\^"\^"^"', fzf#shellescape('""', 'cmd.exe')
+  AssertEqual '^"foobar^>^"', fzf#shellescape('foobar>', 'cmd.exe')
+  AssertEqual '^"\\\\\\\^"\\\\\\^"', fzf#shellescape('\\\"\\\', 'cmd.exe')
+  AssertEqual '^"echo ''a'' ^&^& echo ''b''^"', fzf#shellescape('echo ''a'' && echo ''b''', 'cmd.exe')
+
+  AssertEqual '^"C:\Program Files ^(x86^)\\^"', fzf#shellescape('C:\Program Files (x86)\', 'cmd.exe')
+  AssertEqual '^"C:/Program Files ^(x86^)/^"', fzf#shellescape('C:/Program Files (x86)/', 'cmd.exe')
+  AssertEqual '^"%%USERPROFILE%%^"', fzf#shellescape('%USERPROFILE%', 'cmd.exe')
+
+Execute (Cleanup):
+  unlet g:dir
+  Restore

test/test_fzf.rb

@@ -1,323 +0,0 @@
-#!/usr/bin/env ruby
-# encoding: utf-8
-
-require 'minitest/autorun'
-$LOAD_PATH.unshift File.expand_path('../..', __FILE__)
-ENV['FZF_EXECUTABLE'] = '0'
-load 'fzf'
-
-class TestFZF < MiniTest::Unit::TestCase
-  def test_default_options
-    fzf = FZF.new []
-    assert_equal 1000, fzf.sort
-    assert_equal false, fzf.multi
-    assert_equal true, fzf.color
-    assert_equal Regexp::IGNORECASE, fzf.rxflag
-
-    begin
-      ENV['FZF_DEFAULT_SORT'] = '1500'
-      fzf = FZF.new []
-      assert_equal 1500, fzf.sort
-    ensure
-      ENV.delete 'FZF_DEFAULT_SORT'
-    end
-  end
-
-  def test_option_parser
-    # Long opts
-    fzf = FZF.new %w[--sort=2000 --no-color --multi +i]
-    assert_equal 2000, fzf.sort
-    assert_equal true, fzf.multi
-    assert_equal false, fzf.color
-    assert_equal 0, fzf.rxflag
-
-    # Short opts
-    fzf = FZF.new %w[-s 2000 +c -m +i]
-    assert_equal 2000, fzf.sort
-    assert_equal true, fzf.multi
-    assert_equal false, fzf.color
-    assert_equal 0, fzf.rxflag
-  end
-
-  def test_invalid_option
-    [%w[-s 2000 +s], %w[yo dawg]].each do |argv|
-      assert_raises(SystemExit) do
-        fzf = FZF.new argv
-      end
-    end
-  end
-
-  # FIXME Only on 1.9 or above
-  def test_width
-    fzf = FZF.new []
-    assert_equal 5, fzf.width('abcde')
-    assert_equal 4, fzf.width('한글')
-    assert_equal 5, fzf.width('한글.')
-  end
-
-  def test_trim
-    fzf = FZF.new []
-    assert_equal ['사.',     6], fzf.trim('가나다라마바사.', 4, true)
-    assert_equal ['바사.',   5], fzf.trim('가나다라마바사.', 5, true)
-    assert_equal ['바사.',   5], fzf.trim('가나다라마바사.', 6, true)
-    assert_equal ['마바사.', 4], fzf.trim('가나다라마바사.', 7, true)
-    assert_equal ['가나',    6], fzf.trim('가나다라마바사.', 4, false)
-    assert_equal ['가나',    6], fzf.trim('가나다라마바사.', 5, false)
-    assert_equal ['가나a',   6], fzf.trim('가나ab라마바사.', 5, false)
-    assert_equal ['가나ab',  5], fzf.trim('가나ab라마바사.', 6, false)
-    assert_equal ['가나ab',  5], fzf.trim('가나ab라마바사.', 7, false)
-  end
-
-  def test_format
-    fzf = FZF.new []
-    assert_equal [['01234..', false]], fzf.format('0123456789', 7, [])
-    assert_equal [['012', false], ['34', true], ['..', false]],
-      fzf.format('0123456789', 7, [[3, 5]])
-    assert_equal [['..56', false], ['789', true]],
-      fzf.format('0123456789', 7, [[7, 10]])
-    assert_equal [['..56', false], ['78', true], ['9', false]],
-      fzf.format('0123456789', 7, [[7, 9]])
-
-    (3..5).each do |i|
-      assert_equal [['..', false], ['567', true], ['89', false]],
-        fzf.format('0123456789', 7, [[i, 8]])
-    end
-
-    assert_equal [['..', false], ['345', true], ['..', false]],
-      fzf.format('0123456789', 7, [[3, 6]])
-    assert_equal [['012', false], ['34', true], ['..', false]],
-      fzf.format('0123456789', 7, [[3, 5]])
-
-    # Multi-region
-    assert_equal [["0", true], ["1", false], ["2", true], ["34..", false]],
-      fzf.format('0123456789', 7, [[0, 1], [2, 3]])
-
-    assert_equal [["..", false], ["5", true], ["6", false], ["78", true], ["9", false]],
-      fzf.format('0123456789', 7, [[3, 6], [7, 9]])
-
-    assert_equal [["..", false], ["3", true], ["4", false], ["5", true], ["..", false]],
-      fzf.format('0123456789', 7, [[3, 4], [5, 6]])
-
-    # Multi-region Overlap
-    assert_equal [["..", false], ["345", true], ["..", false]],
-      fzf.format('0123456789', 7, [[4, 5], [3, 6]])
-  end
-
-  def test_fuzzy_matcher
-    matcher = FZF::FuzzyMatcher.new Regexp::IGNORECASE
-    list = %w[
-      juice
-      juiceful
-      juiceless
-      juicily
-      juiciness
-      juicy]
-    assert matcher.caches.empty?
-    assert_equal(
-      [["juice",     [[0, 1]]],
-       ["juiceful",  [[0, 1]]],
-       ["juiceless", [[0, 1]]],
-       ["juicily",   [[0, 1]]],
-       ["juiciness", [[0, 1]]],
-       ["juicy",     [[0, 1]]]], matcher.match(list, 'j', '', '').sort)
-    assert !matcher.caches.empty?
-    assert_equal [list.object_id], matcher.caches.keys
-    assert_equal 1, matcher.caches[list.object_id].length
-    assert_equal 6, matcher.caches[list.object_id]['j'].length
-
-    assert_equal(
-      [["juicily",   [[0, 5]]],
-       ["juiciness", [[0, 5]]]], matcher.match(list, 'jii', '', '').sort)
-
-    assert_equal(
-      [["juicily",   [[2, 5]]],
-       ["juiciness", [[2, 5]]]], matcher.match(list, 'ii', '', '').sort)
-
-    assert_equal 3, matcher.caches[list.object_id].length
-    assert_equal 2, matcher.caches[list.object_id]['ii'].length
-
-    # TODO : partial_cache
-  end
-
-  def test_fuzzy_matcher_case_sensitive
-    assert_equal [['Fruit', [[0, 5]]]],
-      FZF::FuzzyMatcher.new(0).match(%w[Fruit Grapefruit], 'Fruit', '', '').sort
-
-    assert_equal [["Fruit", [[0, 5]]], ["Grapefruit", [[5, 10]]]],
-      FZF::FuzzyMatcher.new(Regexp::IGNORECASE).
-      match(%w[Fruit Grapefruit], 'Fruit', '', '').sort
-  end
-
-  def test_extended_fuzzy_matcher
-    matcher = FZF::ExtendedFuzzyMatcher.new Regexp::IGNORECASE
-    list = %w[
-      juice
-      juiceful
-      juiceless
-      juicily
-      juiciness
-      juicy
-      _juice]
-    match = proc { |q, prefix|
-      matcher.match(list, q, prefix, '').sort.map { |p| [p.first, p.last.sort] }
-    }
-
-    assert matcher.caches.empty?
-    3.times do
-      ['y j', 'j y'].each do |pat|
-        (0..pat.length - 1).each do |prefix_length|
-          prefix = pat[0, prefix_length]
-          assert_equal(
-            [["juicily", [[0, 1], [6, 7]]],
-             ["juicy",   [[0, 1], [4, 5]]]],
-            match.call(pat, prefix))
-        end
-      end
-
-      # $
-      assert_equal [["juiceful",  [[7, 8]]]], match.call('l$', '')
-      assert_equal [["juiceful",  [[7, 8]]],
-                    ["juiceless", [[5, 6]]],
-                    ["juicily",   [[5, 6]]]], match.call('l', '')
-
-      # ^
-      assert_equal list.length,     match.call('j', '').length
-      assert_equal list.length - 1, match.call('^j', '').length
-
-      # !
-      assert_equal 0, match.call('!j', '').length
-
-      # ! + ^
-      assert_equal [["_juice", []]], match.call('!^j', '')
-
-      # ! + $
-      assert_equal list.length - 1, match.call('!l$', '').length
-
-      # ! + f
-      assert_equal [["juicy", [[4, 5]]]], match.call('y !l', '')
-
-      # '
-      assert_equal %w[juiceful juiceless juicily],
-        match.call('il', '').map { |e| e.first }
-      assert_equal %w[juicily],
-        match.call("'il", '').map { |e| e.first }
-      assert_equal (list - %w[juicily]).sort,
-        match.call("!'il", '').map { |e| e.first }.sort
-    end
-    assert !matcher.caches.empty?
-  end
-
-  def test_xfuzzy_matcher_prefix_cache
-    matcher = FZF::ExtendedFuzzyMatcher.new Regexp::IGNORECASE
-    list = %w[
-      a.java
-      b.java
-      java.jive
-      c.java$
-      d.java
-    ]
-    2.times do
-      assert_equal 5, matcher.match(list, 'java',   'java',   '').length
-      assert_equal 3, matcher.match(list, 'java$',  'java$',  '').length
-      assert_equal 1, matcher.match(list, 'java$$', 'java$$', '').length
-
-      assert_equal 0, matcher.match(list, '!java',  '!java',  '').length
-      assert_equal 4, matcher.match(list, '!^jav',  '!^jav',  '').length
-      assert_equal 4, matcher.match(list, '!^java', '!^java', '').length
-      assert_equal 2, matcher.match(list, '!^java !b !c', '!^java', '').length
-    end
-  end
-
-  def test_sort_by_rank
-    matcher  = FZF::FuzzyMatcher.new Regexp::IGNORECASE
-    xmatcher = FZF::ExtendedFuzzyMatcher.new Regexp::IGNORECASE
-    list = %w[
-      0____1
-      0_____1
-      01
-      ____0_1
-      01_
-      _01_
-      0______1
-      ___01___
-    ]
-    assert_equal(
-      [["01",       [[0, 2]]],
-       ["01_",      [[0, 2]]],
-       ["_01_",     [[1, 3]]],
-       ["___01___", [[3, 5]]],
-       ["____0_1",  [[4, 7]]],
-       ["0____1",   [[0, 6]]],
-       ["0_____1",  [[0, 7]]],
-       ["0______1", [[0, 8]]]],
-      FZF.new([]).sort_by_rank(matcher.match(list, '01', '', '')))
-
-    assert_equal(
-      [["01",       [[0, 1], [1, 2]]],
-       ["01_",      [[0, 1], [1, 2]]],
-       ["_01_",     [[1, 2], [2, 3]]],
-       ["0____1",   [[0, 1], [5, 6]]],
-       ["0_____1",  [[0, 1], [6, 7]]],
-       ["____0_1",  [[4, 5], [6, 7]]],
-       ["0______1", [[0, 1], [7, 8]]],
-       ["___01___", [[3, 4], [4, 5]]]],
-      FZF.new([]).sort_by_rank(xmatcher.match(list, '0 1', '', '')))
-
-    assert_equal(
-      [["_01_",     [[1, 3], [0, 4]]],
-       ["0____1",   [[0, 6], [1, 3]]],
-       ["0_____1",  [[0, 7], [1, 3]]],
-       ["0______1", [[0, 8], [1, 3]]],
-       ["___01___", [[3, 5], [0, 2]]],
-       ["____0_1",  [[4, 7], [0, 2]]]],
-      FZF.new([]).sort_by_rank(xmatcher.match(list, '01 __', '', '')))
-  end
-
-  if RUBY_PLATFORM =~ /darwin/
-    NFD = '한글'
-    def test_nfc
-      assert_equal 6, NFD.length
-      assert_equal ["한글", [[0, 1], [1, 2]]],
-        FZF::UConv.nfc(NFD, [[0, 3], [3, 6]])
-
-      nfd2 = 'before' + NFD + 'after'
-      assert_equal 6 + 6 + 5, nfd2.length
-
-      nfc, offsets = FZF::UConv.nfc(nfd2, [[4, 14], [9, 13]])
-      o1, o2 = offsets
-      assert_equal 'before한글after', nfc
-      assert_equal 're한글af',        nfc[(o1.first...o1.last)]
-      assert_equal '글a',             nfc[(o2.first...o2.last)]
-    end
-
-    def test_nfd
-      nfc = '한글'
-      nfd = FZF::UConv.nfd(nfc)
-      assert_equal 2, nfd.length
-      assert_equal 6, nfd.join.length
-      assert_equal NFD, nfd.join
-    end
-
-    def test_nfd_fuzzy_matcher
-      matcher = FZF::FuzzyMatcher.new 0
-      assert_equal [], matcher.match([NFD + NFD], '할', '', '')
-      match   = matcher.match([NFD + NFD], '글글', '', '')
-      assert_equal [[NFD + NFD, [[3, 12]]]], match
-      assert_equal ['한글한글', [[1, 4]]], FZF::UConv.nfc(*match.first)
-    end
-
-    def test_nfd_extended_fuzzy_matcher
-      matcher = FZF::ExtendedFuzzyMatcher.new 0
-      assert_equal [], matcher.match([NFD], "'글글", '', '')
-      match   = matcher.match([NFD], "'한글", '', '')
-      assert_equal [[NFD, [[0, 6]]]], match
-      assert_equal ['한글', [[0, 2]]], FZF::UConv.nfc(*match.first)
-    end
-  end
-
-  def test_split
-    assert_equal ["a", "b", "c", "\xFF", "d", "e", "f"],
-      FZF::UConv.split("abc\xFFdef")
-  end
-end
-

uninstall

@@ -0,0 +1,117 @@
+#!/usr/bin/env bash
+
+xdg=0
+prefix='~/.fzf'
+prefix_expand=~/.fzf
+fish_dir=${XDG_CONFIG_HOME:-$HOME/.config}/fish
+
+help() {
+  cat << EOF
+usage: $0 [OPTIONS]
+
+    --help               Show this message
+    --xdg                Remove files generated under \$XDG_CONFIG_HOME/fzf
+EOF
+}
+
+for opt in "$@"; do
+  case $opt in
+    --help)
+      help
+      exit 0
+      ;;
+    --xdg)
+      xdg=1
+      prefix='"${XDG_CONFIG_HOME:-$HOME/.config}"/fzf/fzf'
+      prefix_expand=${XDG_CONFIG_HOME:-$HOME/.config}/fzf/fzf
+      ;;
+    *)
+      echo "unknown option: $opt"
+      help
+      exit 1
+      ;;
+  esac
+done
+
+ask() {
+  while true; do
+    read -p "$1 ([y]/n) " -r
+    REPLY=${REPLY:-"y"}
+    if [[ $REPLY =~ ^[Yy]$ ]]; then
+      return 0
+    elif [[ $REPLY =~ ^[Nn]$ ]]; then
+      return 1
+    fi
+  done
+}
+
+remove() {
+  echo "Remove $1"
+  rm -f "$1"
+}
+
+remove_line() {
+  src=$(readlink "$1")
+  if [ $? -eq 0 ]; then
+    echo "Remove from $1 ($src):"
+  else
+    src=$1
+    echo "Remove from $1:"
+  fi
+
+  shift
+  line_no=1
+  match=0
+  while [ -n "$1" ]; do
+    line=$(sed -n "$line_no,\$p" "$src" | \grep -m1 -nF "$1")
+    if [ $? -ne 0 ]; then
+      shift
+      line_no=1
+      continue
+    fi
+    line_no=$(( $(sed 's/:.*//' <<< "$line") + line_no - 1 ))
+    content=$(sed 's/^[0-9]*://' <<< "$line")
+    match=1
+    echo    "  - Line #$line_no: $content"
+    [ "$content" = "$1" ] || ask "    - Remove?"
+    if [ $? -eq 0 ]; then
+      awk -v n=$line_no 'NR == n {next} {print}' "$src" > "$src.bak" &&
+        mv "$src.bak" "$src" || break
+      echo  "      - Removed"
+    else
+      echo  "      - Skipped"
+      line_no=$(( line_no + 1 ))
+    fi
+  done
+  [ $match -eq 0 ] && echo "  - Nothing found"
+  echo
+}
+
+for shell in bash zsh; do
+  shell_config=${prefix_expand}.${shell}
+  remove "${shell_config}"
+  remove_line ~/.${shell}rc \
+    "[ -f ${prefix}.${shell} ] && source ${prefix}.${shell}" \
+    "source ${prefix}.${shell}"
+done
+
+bind_file="${fish_dir}/functions/fish_user_key_bindings.fish"
+if [ -f "$bind_file" ]; then
+  remove_line "$bind_file" "fzf_key_bindings"
+fi
+
+if [ -d "${fish_dir}/functions" ]; then
+  remove "${fish_dir}/functions/fzf.fish"
+  remove "${fish_dir}/functions/fzf_key_bindings.fish"
+
+  if [ "$(ls -A "${fish_dir}/functions")" ]; then
+    echo "Can't delete non-empty directory: \"${fish_dir}/functions\""
+  else
+    rmdir "${fish_dir}/functions"
+  fi
+fi
+
+config_dir=$(dirname "$prefix_expand")
+if [[ "$xdg" = 1 ]] && [[ "$config_dir" = */fzf ]] && [[ -d "$config_dir" ]]; then
+  rmdir "$config_dir"
+fi