0.41.0

So that it's not propagated to the child processes and affect the
behavior of fzf started by them.

fzf 0.41.0 or above is required as it fixed the issue where
'become' process is not given a proper tty device.

Close #3299

.github/workflows/linux.yml

@@ -20,7 +20,7 @@ jobs:
         fetch-depth: 0
 
     - name: Set up Go
-      uses: actions/setup-go@v3
+      uses: actions/setup-go@v4
       with:
         go-version: 1.19
 

.github/workflows/macos.yml

@@ -20,7 +20,7 @@ jobs:
         fetch-depth: 0
 
     - name: Set up Go
-      uses: actions/setup-go@v3
+      uses: actions/setup-go@v4
       with:
         go-version: 1.18
 

.github/workflows/typos.yml

@@ -0,0 +1,10 @@
+name: "Spell Check"
+on: [pull_request]
+
+jobs:
+  typos:
+    name: Spell Check with Typos
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v3
+    - uses: crate-ci/typos@v1.14.10

.goreleaser.yml

@@ -74,6 +74,7 @@ builds:
       - arm64
       - loong64
       - ppc64le
+      - s390x
     goarm:
       - 5
       - 6

.tool-versions

@@ -1 +1 @@
-golang 1.19
+golang 1.20.4

ADVANCED.md

@@ -1,8 +1,8 @@
 Advanced fzf examples
 ======================
 
-* *Last update: 2023/02/15*
+* *Last update: 2023/05/26*
-* *Requires fzf 0.38.0 or above*
+* *Requires fzf 0.41.0 or above*
 
 ---
 
@@ -336,9 +336,8 @@ projects, and it will free up memory as you narrow down the results.
 # 3. Open the file in Vim
 RG_PREFIX="rg --column --line-number --no-heading --color=always --smart-case "
 INITIAL_QUERY="${*:-}"
-FZF_DEFAULT_COMMAND="$RG_PREFIX $(printf %q "$INITIAL_QUERY")" \
+: | fzf --ansi --disabled --query "$INITIAL_QUERY" \
-fzf --ansi \
+    --bind "start:reload:$RG_PREFIX {q}" \
-    --disabled --query "$INITIAL_QUERY" \
     --bind "change:reload:sleep 0.1; $RG_PREFIX {q} || true" \
     --delimiter : \
     --preview 'bat --color=always {1} --highlight-line {2}' \
@@ -348,11 +347,11 @@ fzf --ansi \
 
 ![image](https://user-images.githubusercontent.com/700826/113684212-f9ff0a00-96ff-11eb-8737-7bb571d320cc.png)
 
-- Instead of starting fzf in `rg ... | fzf` form, we start fzf without an
+- Instead of starting fzf in the usual `rg ... | fzf` form, we start fzf with
-  explicit input, but with a custom `FZF_DEFAULT_COMMAND` variable. This way
+  an empty input (`: | fzf`), then we make it start the initial Ripgrep
-  fzf can kill the initial Ripgrep process it starts with the initial query.
+  process immediately via `start:reload` binding. This way, fzf owns the
-  Otherwise, the initial Ripgrep process will keep consuming system resources
+  initial Ripgrep process so it can kill it on the next `reload`. Otherwise,
-  even after `reload` is triggered.
+  the process will keep running in the background.
 - Filtering is no longer a responsibility of fzf; hence `--disabled`
 - `{q}` in the reload command evaluates to the query string on fzf prompt.
 - `sleep 0.1` in the reload command is for "debouncing". This small delay will
@@ -376,12 +375,11 @@ fzf-only search mode by *"unbinding"* `reload` action from `change` event.
 # 3. Open the file in Vim
 RG_PREFIX="rg --column --line-number --no-heading --color=always --smart-case "
 INITIAL_QUERY="${*:-}"
-FZF_DEFAULT_COMMAND="$RG_PREFIX $(printf %q "$INITIAL_QUERY")" \
+: | fzf --ansi --disabled --query "$INITIAL_QUERY" \
-fzf --ansi \
+    --bind "start:reload:$RG_PREFIX {q}" \
-    --color "hl:-1:underline,hl+:-1:underline:reverse" \
-    --disabled --query "$INITIAL_QUERY" \
     --bind "change:reload:sleep 0.1; $RG_PREFIX {q} || true" \
     --bind "alt-enter:unbind(change,alt-enter)+change-prompt(2. fzf> )+enable-search+clear-query" \
+    --color "hl:-1:underline,hl+:-1:underline:reverse" \
     --prompt '1. ripgrep> ' \
     --delimiter : \
     --preview 'bat --color=always {1} --highlight-line {2}' \
@@ -421,14 +419,12 @@ CTRL-F.
 rm -f /tmp/rg-fzf-{r,f}
 RG_PREFIX="rg --column --line-number --no-heading --color=always --smart-case "
 INITIAL_QUERY="${*:-}"
-FZF_DEFAULT_COMMAND="$RG_PREFIX $(printf %q "$INITIAL_QUERY")" \
+: | fzf --ansi --disabled --query "$INITIAL_QUERY" \
-fzf --ansi \
+    --bind "start:reload($RG_PREFIX {q})+unbind(ctrl-r)" \
-    --color "hl:-1:underline,hl+:-1:underline:reverse" \
-    --disabled --query "$INITIAL_QUERY" \
     --bind "change:reload:sleep 0.1; $RG_PREFIX {q} || true" \
     --bind "ctrl-f:unbind(change,ctrl-f)+change-prompt(2. fzf> )+enable-search+rebind(ctrl-r)+transform-query(echo {q} > /tmp/rg-fzf-r; cat /tmp/rg-fzf-f)" \
     --bind "ctrl-r:unbind(ctrl-r)+change-prompt(1. ripgrep> )+disable-search+reload($RG_PREFIX {q} || true)+rebind(change,ctrl-f)+transform-query(echo {q} > /tmp/rg-fzf-f; cat /tmp/rg-fzf-r)" \
-    --bind "start:unbind(ctrl-r)" \
+    --color "hl:-1:underline,hl+:-1:underline:reverse" \
     --prompt '1. ripgrep> ' \
     --delimiter : \
     --header '╱ CTRL-R (ripgrep mode) ╱ CTRL-F (fzf mode) ╱' \
@@ -471,16 +467,17 @@ Kubernetes pods.
 
 ```bash
 pods() {
-  FZF_DEFAULT_COMMAND="kubectl get pods --all-namespaces" \
+  : | command='kubectl get pods --all-namespaces' fzf \
-    fzf --info=inline --layout=reverse --header-lines=1 \
+    --info=inline --layout=reverse --header-lines=1 \
-        --prompt "$(kubectl config current-context | sed 's/-context$//')> " \
+    --prompt "$(kubectl config current-context | sed 's/-context$//')> " \
-        --header $'╱ Enter (kubectl exec) ╱ CTRL-O (open log in editor) ╱ CTRL-R (reload) ╱\n\n' \
+    --header $'╱ Enter (kubectl exec) ╱ CTRL-O (open log in editor) ╱ CTRL-R (reload) ╱\n\n' \
-        --bind 'ctrl-/:change-preview-window(80%,border-bottom|hidden|)' \
+    --bind 'start:reload:$command' \
-        --bind 'enter:execute:kubectl exec -it --namespace {1} {2} -- bash > /dev/tty' \
+    --bind 'ctrl-r:reload:$command' \
-        --bind 'ctrl-o:execute:${EDITOR:-vim} <(kubectl logs --all-containers --namespace {1} {2}) > /dev/tty' \
+    --bind 'ctrl-/:change-preview-window(80%,border-bottom|hidden|)' \
-        --bind 'ctrl-r:reload:$FZF_DEFAULT_COMMAND' \
+    --bind 'enter:execute:kubectl exec -it --namespace {1} {2} -- bash > /dev/tty' \
-        --preview-window up:follow \
+    --bind 'ctrl-o:execute:${EDITOR:-vim} <(kubectl logs --all-containers --namespace {1} {2}) > /dev/tty' \
-        --preview 'kubectl logs --follow --all-containers --tail=10000 --namespace {1} {2}' "$@"
+    --preview-window up:follow \
+    --preview 'kubectl logs --follow --all-containers --tail=10000 --namespace {1} {2}' "$@"
 }
 ```
 

CHANGELOG.md

@@ -1,6 +1,89 @@
 CHANGELOG
 =========
 
+0.41.0
+------
+- Added color name `preview-border` and `preview-scrollbar`
+- Added new border style `block` which uses [block elements](https://en.wikipedia.org/wiki/Block_Elements)
+- `--scrollbar` can take two characters, one for the main window, the other
+  for the preview window
+- Putting it altogether:
+  ```sh
+  fzf-tmux -p 80% --padding 1,2 --preview 'bat --style=plain --color=always {}' \
+      --color 'bg:237,bg+:235,gutter:237,border:238,scrollbar:236' \
+      --color 'preview-bg:235,preview-border:236,preview-scrollbar:234' \
+      --preview-window 'border-block' --border block --scrollbar '▌▐'
+  ```
+- Bug fixes and improvements
+
+0.40.0
+------
+- Added `zero` event that is triggered when there's no match
+  ```sh
+  # Reload the candidate list when there's no match
+  echo $RANDOM | fzf --bind 'zero:reload(echo $RANDOM)+clear-query' --height 3
+  ```
+- New actions
+    - Added `track` action which makes fzf track the current item when the
+      search result is updated. If the user manually moves the cursor, or the
+      item is not in the updated search result, tracking is automatically
+      disabled. Tracking is useful when you want to see the surrounding items
+      by deleting the query string.
+      ```sh
+      # Narrow down the list with a query, point to a command,
+      # and hit CTRL-T to see its surrounding commands.
+      export FZF_CTRL_R_OPTS="
+        --preview 'echo {}' --preview-window up:3:hidden:wrap
+        --bind 'ctrl-/:toggle-preview'
+        --bind 'ctrl-t:track+clear-query'
+        --bind 'ctrl-y:execute-silent(echo -n {2..} | pbcopy)+abort'
+        --color header:italic
+        --header 'Press CTRL-Y to copy command into clipboard'"
+      ```
+    - Added `change-header(...)`
+    - Added `transform-header(...)`
+    - Added `toggle-track` action
+- Fixed `--track` behavior when used with `--tac`
+    - However, using `--track` with `--tac` is not recommended. The resulting
+      behavior can be very confusing.
+- Bug fixes and improvements
+
+0.39.0
+------
+- Added `one` event that is triggered when there's only one match
+  ```sh
+  # Automatically select the only match
+  seq 10 | fzf --bind one:accept
+  ```
+- Added `--track` option that makes fzf track the current selection when the
+  result list is updated. This can be useful when browsing logs using fzf with
+  sorting disabled.
+  ```sh
+  git log --oneline --graph --color=always | nl |
+      fzf --ansi --track --no-sort --layout=reverse-list
+  ```
+- If you use `--listen` option without a port number fzf will automatically
+  allocate an available port and export it as `$FZF_PORT` environment
+  variable.
+  ```sh
+  # Automatic port assignment
+  fzf --listen --bind 'start:execute-silent:echo $FZF_PORT > /tmp/fzf-port'
+
+  # Say hello
+  curl "localhost:$(cat /tmp/fzf-port)" -d 'preview:echo Hello, fzf is listening on $FZF_PORT.'
+  ```
+- A carriage return and a line feed character will be rendered as dim ␍ and
+  ␊ respectively.
+  ```sh
+  printf "foo\rbar\nbaz" | fzf --read0 --preview 'echo {}'
+  ```
+- fzf will stop rendering a non-displayable characters as a space. This will
+  likely cause less glitches in the preview window.
+  ```sh
+  fzf --preview 'head -1000 /dev/random'
+  ```
+- Bug fixes and improvements
+
 0.38.0
 ------
 - New actions
@@ -140,7 +223,7 @@ CHANGELOG
 - Added color name `preview-label` for `--preview-label` (defaults to `label`
   for `--border-label`)
 - Better support for (Windows) terminals where each box-drawing character
-  takes 2 columns. Set `RUNEWIDTH_EASTASIAN` environment variable to `1`.
+  takes 2 columns. Set `RUNEWIDTH_EASTASIAN` environment variable to `0` or `1`.
     - On Vim, the variable will be automatically set if `&ambiwidth` is `double`
 - Behavior changes
     - fzf will always execute the preview command if the command template

Dockerfile

@@ -1,4 +1,4 @@
-FROM archlinux
+FROM --platform=linux/amd64 archlinux
 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

Makefile

@@ -20,7 +20,7 @@ VERSION_REGEX  := $(subst .,\.,$(VERSION_TRIM))
 ifdef FZF_REVISION
 REVISION       := $(FZF_REVISION)
 else
-REVISION       := $(shell git log -n 1 --pretty=format:%h -- $(SOURCES) 2> /dev/null)
+REVISION       := $(shell git log -n 1 --pretty=format:%h --abbrev=8 -- $(SOURCES) 2> /dev/null)
 endif
 ifeq ($(REVISION),)
 $(error Not on git repository; cannot determine $$FZF_REVISION)
@@ -29,6 +29,7 @@ BUILD_FLAGS    := -a -ldflags "-s -w -X main.version=$(VERSION) -X main.revision
 
 BINARY32       := fzf-$(GOOS)_386
 BINARY64       := fzf-$(GOOS)_amd64
+BINARYS390     := fzf-$(GOOS)_s390x
 BINARYARM5     := fzf-$(GOOS)_arm5
 BINARYARM6     := fzf-$(GOOS)_arm6
 BINARYARM7     := fzf-$(GOOS)_arm7
@@ -43,6 +44,8 @@ ifeq ($(UNAME_M),x86_64)
 	BINARY := $(BINARY64)
 else ifeq ($(UNAME_M),amd64)
 	BINARY := $(BINARY64)
+else ifeq ($(UNAME_M),s390x)
+	BINARY := $(BINARYS390)
 else ifeq ($(UNAME_M),i686)
 	BINARY := $(BINARY32)
 else ifeq ($(UNAME_M),i386)
@@ -85,7 +88,7 @@ bench:
 install: bin/fzf
 
 build:
-	goreleaser --rm-dist --snapshot
+	goreleaser build --rm-dist --snapshot --skip-post-hooks
 
 release:
 ifndef GITHUB_TOKEN
@@ -132,6 +135,8 @@ target/$(BINARY32): $(SOURCES)
 target/$(BINARY64): $(SOURCES)
 	GOARCH=amd64 $(GO) build $(BUILD_FLAGS) -o $@
 
+target/$(BINARYS390): $(SOURCES)
+	GOARCH=s390x $(GO) build $(BUILD_FLAGS) -o $@
 # https://github.com/golang/go/wiki/GoArm
 target/$(BINARYARM5): $(SOURCES)
 	GOARCH=arm GOARM=5 $(GO) build $(BUILD_FLAGS) -o $@

README-VIM.md

@@ -15,7 +15,7 @@ set rtp+=/usr/local/opt/fzf
 " If installed using Homebrew on Apple Silicon
 set rtp+=/opt/homebrew/opt/fzf
 
-" If installed using git
+" If you have cloned fzf on ~/.fzf directory
 set rtp+=~/.fzf
 ```
 
@@ -26,7 +26,7 @@ written as:
 " If installed using Homebrew
 Plug '/usr/local/opt/fzf'
 
-" If installed using git
+" If you have cloned fzf on ~/.fzf directory
 Plug '~/.fzf'
 ```
 
@@ -118,7 +118,7 @@ let g:fzf_action = {
 
 " 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 }'))
+  call setqflist(map(copy(a:lines), '{ "filename": v:val, "lnum": 1 }'))
   copen
   cc
 endfunction

README.md

@@ -61,8 +61,8 @@ Table of Contents
         * [3. Interactive ripgrep integration](#3-interactive-ripgrep-integration)
     * [Preview window](#preview-window)
 * [Tips](#tips)
-        * [Respecting `.gitignore`](#respecting-gitignore)
+    * [Respecting `.gitignore`](#respecting-gitignore)
-        * [Fish shell](#fish-shell)
+    * [Fish shell](#fish-shell)
 * [Related projects](#related-projects)
 * [License](#license)
 
@@ -124,6 +124,7 @@ git clone --depth 1 https://github.com/junegunn/fzf.git ~/.fzf
 | pkg             | FreeBSD                 | `pkg install fzf`                  |
 | pkgin           | NetBSD                  | `pkgin install fzf`                |
 | pkg_add         | OpenBSD                 | `pkg_add fzf`                      |
+| Portage         | Gentoo                  | `emerge --ask app-shells/fzf`      |
 | XBPS            | Void Linux              | `sudo xbps-install -S fzf`         |
 | Zypper          | openSUSE                | `sudo zypper install fzf`          |
 
@@ -629,8 +630,8 @@ more details.
 #### 1. Update the list of processes by pressing CTRL-R
 
 ```sh
-FZF_DEFAULT_COMMAND='ps -ef' \
+ps -ef |
-  fzf --bind 'ctrl-r:reload(eval "$FZF_DEFAULT_COMMAND")' \
+  fzf --bind 'ctrl-r:reload(ps -ef)' \
       --header 'Press CTRL-R to reload' --header-lines=1 \
       --height=50% --layout=reverse
 ```
@@ -652,12 +653,12 @@ expression `{q}`. Also, note that we used `--disabled` 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' \
-RG_PREFIX="rg --column --line-number --no-heading --color=always --smart-case "
+    fzf --bind 'start:reload:$rg_prefix ""' \
-FZF_DEFAULT_COMMAND="$RG_PREFIX '$INITIAL_QUERY'" \
+        --bind 'change:reload:$rg_prefix {q} || true' \
-  fzf --bind "change:reload:$RG_PREFIX {q} || true" \
+        --bind 'enter:become(vim {1} +{2})' \
-      --ansi --disabled --query "$INITIAL_QUERY" \
+        --ansi --disabled \
-      --height=50% --layout=reverse
+        --height=50% --layout=reverse
 ```
 
 If ripgrep doesn't find any matches, it will exit with a non-zero exit status,
@@ -665,7 +666,7 @@ 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.
 
 See ["Using fzf as interactive Ripgrep launcher"](https://github.com/junegunn/fzf/blob/master/ADVANCED.md#using-fzf-as-interactive-ripgrep-launcher)
-for a fuller example with preview window options.
+for more sophisticated examples.
 
 ### Preview window
 
@@ -723,7 +724,7 @@ history | fzf
 Tips
 ----
 
-#### Respecting `.gitignore`
+### Respecting `.gitignore`
 
 You can use [fd](https://github.com/sharkdp/fd),
 [ripgrep](https://github.com/BurntSushi/ripgrep), or [the silver
@@ -752,7 +753,7 @@ hidden files, use the following command:
 export FZF_DEFAULT_COMMAND='fd --type f --strip-cwd-prefix --hidden --follow --exclude .git'
 ```
 
-#### Fish shell
+### Fish shell
 
 `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

bin/fzf-tmux

@@ -179,12 +179,15 @@ trap 'cleanup' EXIT
 
 envs="export TERM=$TERM "
 if [[ "$opt" =~ "-E" ]]; then
-  tmux_version=$(tmux -V)
+  tmux_version=$(tmux -V | sed 's/[^0-9.]//g')
-  if [[ $tmux_version =~ ^tmux\ 3\.2[a-z]?$ ]]; then
+  if [[ $(awk '{print ($1 > 3.2)}' <<< "$tmux_version" 2> /dev/null || bc -l <<< "$tmux_version > 3.2") = 1 ]]; then
-    FZF_DEFAULT_OPTS="--margin 0,1 $FZF_DEFAULT_OPTS"
-  else
     FZF_DEFAULT_OPTS="--border $FZF_DEFAULT_OPTS"
     opt="-B $opt"
+  elif [[ $tmux_version = 3.2 ]]; then
+    FZF_DEFAULT_OPTS="--margin 0,1 $FZF_DEFAULT_OPTS"
+  else
+    echo "fzf-tmux: tmux 3.2 or above is required for popup mode" >&2
+    exit 2
   fi
 fi
 [[ -n "$FZF_DEFAULT_OPTS"    ]] && envs="$envs FZF_DEFAULT_OPTS=$(printf %q "$FZF_DEFAULT_OPTS")"

doc/fzf.txt

@@ -1,4 +1,4 @@
-fzf.txt	fzf	Last change: May 19 2021
+fzf.txt	fzf	Last change: Mar 20 2023
 FZF - TABLE OF CONTENTS                                            *fzf* *fzf-toc*
 ==============================================================================
 
@@ -32,7 +32,7 @@ depending on the package manager.
     " If installed using Homebrew
     set rtp+=/usr/local/opt/fzf
 
-    " If installed using git
+    " If you have cloned fzf on ~/.fzf directory
     set rtp+=~/.fzf
 <
 If you use {vim-plug}{1}, the same can be written as:
@@ -40,7 +40,7 @@ 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
+    " If you have cloned fzf on ~/.fzf directory
     Plug '~/.fzf'
 <
 But if you want the latest Vim plugin file from GitHub rather than the one
@@ -143,7 +143,7 @@ Examples~
 
     " 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 }'))
+      call setqflist(map(copy(a:lines), '{ "filename": v:val, "lnum": 1 }'))
       copen
       cc
     endfunction

go.mod

@@ -5,10 +5,10 @@ require (
 	github.com/mattn/go-isatty v0.0.17
 	github.com/mattn/go-runewidth v0.0.14
 	github.com/mattn/go-shellwords v1.0.12
-	github.com/rivo/uniseg v0.4.2
+	github.com/rivo/uniseg v0.4.4
 	github.com/saracen/walker v0.1.3
-	golang.org/x/sys v0.0.0-20220811171246-fbc7d0a398ab
+	golang.org/x/sys v0.8.0
-	golang.org/x/term v0.0.0-20210927222741-03fcf44c2211
+	golang.org/x/term v0.8.0
 )
 
 require (

go.sum

@@ -11,8 +11,8 @@ github.com/mattn/go-runewidth v0.0.14/go.mod h1:Jdepj2loyihRzMpdS35Xk/zdY8IAYHsh
 github.com/mattn/go-shellwords v1.0.12 h1:M2zGm7EW6UQJvDeQxo4T51eKPurbeFbe8WtebGE2xrk=
 github.com/mattn/go-shellwords v1.0.12/go.mod h1:EZzvwXDESEeg03EKmM+RmDnNOPKG4lLtQsUlTZDWQ8Y=
 github.com/rivo/uniseg v0.2.0/go.mod h1:J6wj4VEh+S6ZtnVlnTBMWIodfgj8LQOQFoIToxlJtxc=
-github.com/rivo/uniseg v0.4.2 h1:YwD0ulJSJytLpiaWua0sBDusfsCZohxjxzVTYjwxfV8=
+github.com/rivo/uniseg v0.4.4 h1:8TfxU8dW6PdqD27gjM8MVNuicgxIjxpm4K7x4jp8sis=
-github.com/rivo/uniseg v0.4.2/go.mod h1:FN3SvrM+Zdj16jyLfmOkMNblXMcoc8DfTHruCPUcx88=
+github.com/rivo/uniseg v0.4.4/go.mod h1:FN3SvrM+Zdj16jyLfmOkMNblXMcoc8DfTHruCPUcx88=
 github.com/saracen/walker v0.1.3 h1:YtcKKmpRPy6XJTHJ75J2QYXXZYWnZNQxPCVqZSHVV/g=
 github.com/saracen/walker v0.1.3/go.mod h1:FU+7qU8DeQQgSZDmmThMJi93kPkLFgy0oVAcLxurjIk=
 github.com/yuin/goldmark v1.4.13/go.mod h1:6yULJ656Px+3vBD8DxQVa3kxgyrAnzto9xy5taEt/CY=
@@ -31,11 +31,13 @@ golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20220520151302-bc2c85ada10a/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20220722155257-8c9f86f7a55f/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.0.0-20220811171246-fbc7d0a398ab h1:2QkjZIsXupsJbJIdSjjUOgWK3aEtzyuh2mPt3l/CkeU=
 golang.org/x/sys v0.0.0-20220811171246-fbc7d0a398ab/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.8.0 h1:EBmGv8NaZBZTWvrbjNoL6HVt+IVy3QDQpJs7VRIw3tU=
+golang.org/x/sys v0.8.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
-golang.org/x/term v0.0.0-20210927222741-03fcf44c2211 h1:JGgROgKl9N8DuW20oFS5gxc+lE67/N3FcwmBPMe7ArY=
 golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
+golang.org/x/term v0.8.0 h1:n5xxQn2i3PC0yLAbjTpNT85q/Kgzcr2gIoX9OrJUols=
+golang.org/x/term v0.8.0/go.mod h1:xPskH00ivmX89bAKVGSKKtLOWNx2+17Eiy94tnKShWo=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=

install

@@ -2,7 +2,7 @@
 
 set -u
 
-version=0.38.0
+version=0.41.0
 auto_completion=
 key_bindings=
 update_config=2
@@ -178,6 +178,7 @@ case "$archi" in
   Linux\ loongarch64) download fzf-$version-linux_loong64.tar.gz ;;
   Linux\ ppc64le)     download fzf-$version-linux_ppc64le.tar.gz ;;
   Linux\ *64)         download fzf-$version-linux_amd64.tar.gz   ;;
+  Linux\ s390x)       download fzf-$version-linux_s390x.tar.gz   ;;
   FreeBSD\ *64)       download fzf-$version-freebsd_amd64.tar.gz ;;
   OpenBSD\ *64)       download fzf-$version-openbsd_amd64.tar.gz ;;
   CYGWIN*\ *64)       download fzf-$version-windows_amd64.zip    ;;

install.ps1

@@ -1,4 +1,4 @@
-$version="0.38.0"
+$version="0.41.0"
 
 $fzf_base=Split-Path -Parent $MyInvocation.MyCommand.Definition
 

main.go

@@ -5,7 +5,7 @@ import (
 	"github.com/junegunn/fzf/src/protector"
 )
 
-var version string = "0.38"
+var version string = "0.41"
 var revision string = "devel"
 
 func main() {

man/man1/fzf-tmux.1

@@ -21,7 +21,7 @@ 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 "Feb 2023" "fzf 0.38.0" "fzf-tmux - open fzf in tmux split pane"
+.TH fzf-tmux 1 "May 2023" "fzf 0.41.0" "fzf-tmux - open fzf in tmux split pane"
 
 .SH NAME
 fzf-tmux - open fzf in tmux split pane

man/man1/fzf.1

@@ -21,7 +21,7 @@ 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 "Feb 2023" "fzf 0.38.0" "fzf - a command-line fuzzy finder"
+.TH fzf 1 "May 2023" "fzf 0.41.0" "fzf - a command-line fuzzy finder"
 
 .SH NAME
 fzf - a command-line fuzzy finder
@@ -92,6 +92,19 @@ interface rather than a "fuzzy finder". You can later enable the search using
 .B "+s, --no-sort"
 Do not sort the result
 .TP
+.B "--track"
+Make fzf track the current selection when the result list is updated.
+This can be useful when browsing logs using fzf with sorting disabled. It is
+not recommended to use this option with \fB--tac\fR as the resulting behavior
+can be confusing. Also, consider using \fBtrack\fR action instead of this
+option.
+
+.RS
+e.g.
+     \fBgit log --oneline --graph --color=always | nl |
+         fzf --ansi --track --no-sort --layout=reverse-list\fR
+.RE
+.TP
 .B "--tac"
 Reverse the order of the input
 
@@ -231,8 +244,9 @@ Draw border around the finder
 .br
 
 If you use a terminal emulator where each box-drawing character takes
-2 columns, try setting \fBRUNEWIDTH_EASTASIAN\fR to \fB1\fR. If the border is
+2 columns, try setting \fBRUNEWIDTH_EASTASIAN\fR environment variable to
-still not properly rendered, set \fB--no-unicode\fR.
+\fB0\fR or \fB1\fR. If the border is still not properly rendered, set
+\fB--no-unicode\fR.
 
 .TP
 .BI "--border-label" [=LABEL]
@@ -363,9 +377,10 @@ Do not display horizontal separator on the info line. A synonym for
 \fB--separator=''\fB
 
 .TP
-.BI "--scrollbar=" "CHAR"
+.BI "--scrollbar=" "CHAR1[CHAR2]"
 Use the given character to render scrollbar. (default: '│' or ':' depending on
-\fB--no-unicode\fR).
+\fB--no-unicode\fR). The optional \fBCHAR2\fR is used to render scrollbar of
+the preview window.
 
 .TP
 .B "--no-scrollbar"
@@ -419,28 +434,30 @@ color mappings.
     \fBbw      \fRNo colors (equivalent to \fB--no-color\fR)
 
 .B COLOR NAMES:
-    \fBfg              \fRText
+    \fBfg                  \fRText
-      \fBpreview-fg    \fRPreview window text
+      \fBpreview-fg        \fRPreview window text
-    \fBbg              \fRBackground
+    \fBbg                  \fRBackground
-      \fBpreview-bg    \fRPreview window background
+      \fBpreview-bg        \fRPreview window background
-    \fBhl              \fRHighlighted substrings
+    \fBhl                  \fRHighlighted substrings
-    \fBfg+             \fRText (current line)
+    \fBfg+                 \fRText (current line)
-    \fBbg+             \fRBackground (current line)
+    \fBbg+                 \fRBackground (current line)
-      \fBgutter        \fRGutter on the left
+      \fBgutter            \fRGutter on the left
-    \fBhl+             \fRHighlighted substrings (current line)
+    \fBhl+                 \fRHighlighted substrings (current line)
-    \fBquery           \fRQuery string
+    \fBquery               \fRQuery string
-      \fBdisabled      \fRQuery string when search is disabled (\fB--disabled\fR)
+      \fBdisabled          \fRQuery string when search is disabled (\fB--disabled\fR)
-    \fBinfo            \fRInfo line (match counters)
+    \fBinfo                \fRInfo line (match counters)
-    \fBborder          \fRBorder around the window (\fB--border\fR and \fB--preview\fR)
+    \fBborder              \fRBorder around the window (\fB--border\fR and \fB--preview\fR)
-      \fBseparator     \fRHorizontal separator on info line
+      \fBscrollbar         \fRScrollbar
-      \fBscrollbar     \fRScrollbar
+      \fBpreview-border    \fRBorder around the preview window (\fB--preview\fR)
-    \fBlabel           \fRBorder label (\fB--border-label\fR and \fB--preview-label\fR)
+      \fBpreview-scrollbar \fRScrollbar
-      \fBpreview-label \fRBorder label of the preview window (\fB--preview-label\fR)
+      \fBseparator         \fRHorizontal separator on info line
-    \fBprompt          \fRPrompt
+    \fBlabel               \fRBorder label (\fB--border-label\fR and \fB--preview-label\fR)
-    \fBpointer         \fRPointer to the current line
+      \fBpreview-label     \fRBorder label of the preview window (\fB--preview-label\fR)
-    \fBmarker          \fRMulti-select marker
+    \fBprompt              \fRPrompt
-    \fBspinner         \fRStreaming input indicator
+    \fBpointer             \fRPointer to the current line
-    \fBheader          \fRHeader
+    \fBmarker              \fRMulti-select marker
+    \fBspinner             \fRStreaming input indicator
+    \fBheader              \fRHeader
 
 .B ANSI COLORS:
     \fB-1         \fRDefault terminal foreground/background color
@@ -738,9 +755,12 @@ ncurses finder only after the input stream is complete.
 e.g. \fBfzf --multi | fzf --sync\fR
 .RE
 .TP
-.B "--listen=HTTP_PORT"
+.B "--listen[=HTTP_PORT]"
 Start HTTP server on the given port. It allows external processes to send
-actions to perform via POST method.
+actions to perform via POST method. If the port number is omitted or given as
+0, fzf will choose the port automatically and export it as \fBFZF_PORT\fR
+environment variable to the child processes started via \fBexecute\fR and
+\fBexecute-silent\fR actions.
 
 e.g.
      \fB# Start HTTP server on port 6266
@@ -748,6 +768,9 @@ e.g.
 
      # Send action to the server
      curl -XPOST localhost:6266 -d 'reload(seq 100)+change-prompt(hundred> )'
+
+     # Choose port automatically and export it as $FZF_PORT to the child process
+     fzf --listen --bind 'start:execute-silent:echo $FZF_PORT > /tmp/fzf-port'
      \fR
 .TP
 .B "--version"
@@ -850,6 +873,8 @@ e.g.
 .br
 \fIctrl-space\fR
 .br
+\fIctrl-delete\fR
+.br
 \fIctrl-\\\fR
 .br
 \fIctrl-]\fR
@@ -918,6 +943,8 @@ e.g.
 .br
 \fIshift-right\fR
 .br
+\fIshift-delete\fR
+.br
 \fIalt-shift-up\fR
 .br
 \fIalt-shift-down\fR
@@ -977,6 +1004,28 @@ e.g.
      # Beware not to introduce an infinite loop
      seq 10 | fzf --bind 'focus:up' --cycle\fR
 .RE
+\fIone\fR
+.RS
+Triggered when there's only one match. \fBone:accept\fR binding is comparable
+to \fB--select-1\fR option, but the difference is that \fB--select-1\fR is only
+effective before the interactive finder starts but \fBone\fR event is triggered
+by the interactive finder.
+
+e.g.
+     \fB# Automatically select the only match
+     seq 10 | fzf --bind one:accept\fR
+.RE
+\fIzero\fR
+.RS
+Triggered when there's no match. \fBzero:abort\fR binding is comparable to
+\fB--exit-0\fR option, but the difference is that \fB--exit-0\fR is only
+effective before the interactive finder starts but \fBzero\fR event is
+triggered by the interactive finder.
+
+e.g.
+     \fB# Reload the candidate list when there's no match
+     echo $RANDOM | fzf --bind 'zero:reload(echo $RANDOM)+clear-query' --height 3\fR
+.RE
 
 \fIbackward-eof\fR
 .RS
@@ -1003,6 +1052,7 @@ A key or an event can be bound to one or more of the following actions.
     \fBbeginning-of-line\fR            \fIctrl-a  home\fR
     \fBcancel\fR                       (clear query string if not empty, abort fzf otherwise)
     \fBchange-border-label(...)\fR     (change \fB--border-label\fR to the given string)
+    \fBchange-header(...)\fR           (change header to the given string; doesn't affect \fB--header-lines\fR)
     \fBchange-preview(...)\fR          (change \fB--preview\fR option)
     \fBchange-preview-label(...)\fR    (change \fB--preview-label\fR to the given string)
     \fBchange-preview-window(...)\fR   (change \fB--preview-window\fR option; rotate through the multiple option sets separated by '|')
@@ -1070,8 +1120,11 @@ A key or an event can be bound to one or more of the following actions.
     \fBtoggle-preview-wrap\fR
     \fBtoggle-search\fR                (toggle search functionality)
     \fBtoggle-sort\fR
+    \fBtoggle-track\fR
     \fBtoggle+up\fR                    \fIbtab    (shift-tab)\fR
+    \fBtrack\fR                        (track the current item; automatically disabled if focus changes)
     \fBtransform-border-label(...)\fR  (transform border label using an external command)
+    \fBtransform-header(...)\fR        (transform header using an external command)
     \fBtransform-preview-label(...)\fR (transform preview label using an external command)
     \fBtransform-prompt(...)\fR        (transform prompt string using an external command)
     \fBtransform-query(...)\fR         (transform query string using an external command)
@@ -1145,7 +1198,7 @@ set, otherwise with \fBsh -c\fR, so in this case make sure that the command is
 POSIX-compliant.
 
 \fBbecome(...)\fR action is similar to \fBexecute(...)\fR, but it replaces the
-current fzf process with the specifed command using \fBexecve(2)\fR system
+current fzf process with the specified command using \fBexecve(2)\fR system
 call.
 
     \fBfzf --bind "enter:become(vim {})"\fR

plugin/fzf.vim

@@ -164,7 +164,7 @@ function s:get_version(bin)
   if has_key(s:versions, a:bin)
     return s:versions[a:bin]
   end
-  let command = (&shell =~ 'powershell' ? '&' : '') . s:fzf_call('shellescape', a:bin) . ' --version --no-height'
+  let command = (&shell =~ 'powershell\|pwsh' ? '&' : '') . s:fzf_call('shellescape', a:bin) . ' --version --no-height'
   let output = systemlist(command)
   if v:shell_error || empty(output)
     return ''

shell/completion.bash

@@ -270,8 +270,9 @@ _fzf_complete_kill() {
 }
 
 _fzf_proc_completion() {
-  _fzf_complete -m --preview 'echo {}' --preview-window down:3:wrap --min-height 15 -- "$@" < <(
+  _fzf_complete -m --header-lines=1 --preview 'echo {}' --preview-window down:3:wrap --min-height 15 -- "$@" < <(
-    command ps -ef | sed 1d
+    command ps -eo user,pid,ppid,start,time,command 2> /dev/null ||
+      command ps -eo user,pid,ppid,time,args # For BusyBox
   )
 }
 
@@ -309,7 +310,7 @@ complete -o default -F _fzf_opts_completion fzf-tmux
 
 d_cmds="${FZF_COMPLETION_DIR_COMMANDS:-cd pushd rmdir}"
 a_cmds="
-  awk cat diff diff3
+  awk bat cat diff diff3
   emacs emacsclient ex file ftp g++ gcc gvim head hg hx java
   javac ld less more mvim nvim patch perl python ruby
   sed sftp sort source tail tee uniq vi view vim wc xdg-open

shell/completion.zsh

@@ -251,8 +251,9 @@ _fzf_complete_unalias() {
 }
 
 _fzf_complete_kill() {
-  _fzf_complete -m --preview 'echo {}' --preview-window down:3:wrap --min-height 15 -- "$@" < <(
+  _fzf_complete -m --header-lines=1 --preview 'echo {}' --preview-window down:3:wrap --min-height 15 -- "$@" < <(
-    command ps -ef | sed 1d
+    command ps -eo user,pid,ppid,start,time,command 2> /dev/null ||
+      command ps -eo user,pid,ppid,time,args # For BusyBox
   )
 }
 

src/core.go

@@ -219,6 +219,7 @@ func Run(opts *Options, version string, revision string) {
 	determine := func(final bool) {
 		if heightUnknown {
 			if total >= maxFit || final {
+				deferred = false
 				heightUnknown = false
 				terminal.startChan <- fitpad{util.Min(total, maxFit), padHeight}
 			}
@@ -298,10 +299,12 @@ func Run(opts *Options, version string, revision string) {
 
 				case EvtSearchNew:
 					var command *string
+					var changed bool
 					switch val := value.(type) {
 					case searchRequest:
 						sort = val.sort
 						command = val.command
+						changed = val.changed
 						if command != nil {
 							useSnapshot = val.sync
 						}
@@ -313,12 +316,20 @@ func Run(opts *Options, version string, revision string) {
 						} else {
 							restart(*command)
 						}
+					}
+					if !changed {
 						break
 					}
+					reset := false
 					if !useSnapshot {
-						snapshot, _ = chunkList.Snapshot()
+						newSnapshot, _ := chunkList.Snapshot()
+						// We want to avoid showing empty list when reload is triggered
+						// and the query string is changed at the same time i.e. command != nil && changed
+						if command == nil || len(newSnapshot) > 0 {
+							snapshot = newSnapshot
+							reset = clearCache()
+						}
 					}
-					reset := !useSnapshot && clearCache()
 					matcher.Reset(snapshot, input(reset), true, !reading, sort, reset)
 					delay = false
 

src/merger.go

@@ -17,6 +17,7 @@ type Merger struct {
 	tac     bool
 	final   bool
 	count   int
+	pass    bool
 }
 
 // PassMerger returns a new Merger that simply returns the items in the
@@ -26,7 +27,8 @@ func PassMerger(chunks *[]*Chunk, tac bool) *Merger {
 		pattern: nil,
 		chunks:  chunks,
 		tac:     tac,
-		count:   0}
+		count:   0,
+		pass:    true}
 
 	for _, chunk := range *mg.chunks {
 		mg.count += chunk.count
@@ -58,6 +60,32 @@ func (mg *Merger) Length() int {
 	return mg.count
 }
 
+func (mg *Merger) First() Result {
+	if mg.tac && !mg.sorted {
+		return mg.Get(mg.count - 1)
+	}
+	return mg.Get(0)
+}
+
+// FindIndex returns the index of the item with the given item index
+func (mg *Merger) FindIndex(itemIndex int32) int {
+	index := -1
+	if mg.pass {
+		index = int(itemIndex)
+		if mg.tac {
+			index = mg.count - index - 1
+		}
+	} else {
+		for i := 0; i < mg.count; i++ {
+			if mg.Get(i).item.Index() == itemIndex {
+				index = i
+				break
+			}
+		}
+	}
+	return index
+}
+
 // Get returns the pointer to the Result object indexed by the given integer
 func (mg *Merger) Get(idx int) Result {
 	if mg.chunks != nil {

src/options.go

@@ -33,6 +33,7 @@ const usage = `usage: fzf [options]
                            field index expressions
     -d, --delimiter=STR    Field delimiter regex (default: AWK-style)
     +s, --no-sort          Do not sort the result
+    --track                Track the current selection when the result is updated
     --tac                  Reverse the order of the input
     --disabled             Do not perform search
     --tiebreak=CRI[,..]    Comma-separated list of sort criteria to apply
@@ -62,7 +63,7 @@ const usage = `usage: fzf [options]
                            (default: 10)
     --layout=LAYOUT        Choose layout: [default|reverse|reverse-list]
     --border[=STYLE]       Draw border around the finder
-                           [rounded|sharp|horizontal|vertical|
+                           [rounded|sharp|bold|block|double|horizontal|vertical|
                             top|bottom|left|right|none] (default: rounded)
     --border-label=LABEL   Label to print on the border
     --border-label-pos=COL Position of the border label
@@ -74,7 +75,7 @@ const usage = `usage: fzf [options]
     --info=STYLE           Finder info style [default|hidden|inline|inline:SEPARATOR]
     --separator=STR        String to form horizontal separator on info line
     --no-separator         Hide info line separator
-    --scrollbar[=CHAR]     Scrollbar character
+    --scrollbar[=C1[C2]]   Scrollbar character(s) (each for main and preview window)
     --no-scrollbar         Hide scrollbar
     --prompt=STR           Input prompt (default: '> ')
     --pointer=STR          Pointer to the current line (default: '>')
@@ -116,7 +117,7 @@ const usage = `usage: fzf [options]
     --read0                Read input delimited by ASCII NUL characters
     --print0               Print output delimited by ASCII NUL characters
     --sync                 Synchronous search for multi-staged filtering
-    --listen=HTTP_PORT     Start HTTP server to receive actions (POST /)
+    --listen[=HTTP_PORT]   Start HTTP server to receive actions (POST /)
     --version              Display version information and exit
 
   Environment variables
@@ -164,6 +165,14 @@ func defaultMargin() [4]sizeSpec {
 	return [4]sizeSpec{}
 }
 
+type trackOption int
+
+const (
+	trackDisabled trackOption = iota
+	trackEnabled
+	trackCurrent
+)
+
 type windowPosition int
 
 const (
@@ -266,6 +275,7 @@ type Options struct {
 	WithNth      []Range
 	Delimiter    Delimiter
 	Sort         int
+	Track        trackOption
 	Tac          bool
 	Criteria     []criterion
 	Multi        int
@@ -316,7 +326,7 @@ type Options struct {
 	PreviewLabel labelOpts
 	Unicode      bool
 	Tabstop      int
-	ListenPort   int
+	ListenPort   *int
 	ClearOnExit  bool
 	Version      bool
 }
@@ -338,6 +348,7 @@ func defaultOptions() *Options {
 		WithNth:      make([]Range, 0),
 		Delimiter:    Delimiter{},
 		Sort:         1000,
+		Track:        trackDisabled,
 		Tac:          false,
 		Criteria:     []criterion{byScore, byLength},
 		Multi:        0,
@@ -533,6 +544,8 @@ func parseBorder(str string, optional bool) tui.BorderShape {
 		return tui.BorderSharp
 	case "bold":
 		return tui.BorderBold
+	case "block":
+		return tui.BorderBlock
 	case "double":
 		return tui.BorderDouble
 	case "horizontal":
@@ -553,7 +566,7 @@ func parseBorder(str string, optional bool) tui.BorderShape {
 		if optional && str == "" {
 			return tui.DefaultBorderShape
 		}
-		errorExit("invalid border style (expected: rounded|sharp|bold|double|horizontal|vertical|top|bottom|left|right|none)")
+		errorExit("invalid border style (expected: rounded|sharp|bold|block|double|horizontal|vertical|top|bottom|left|right|none)")
 	}
 	return tui.BorderNone
 }
@@ -601,6 +614,8 @@ func parseKeyChordsImpl(str string, message string, exit func(string)) map[tui.E
 			add(tui.BSpace)
 		case "ctrl-space":
 			add(tui.CtrlSpace)
+		case "ctrl-delete":
+			add(tui.CtrlDelete)
 		case "ctrl-^", "ctrl-6":
 			add(tui.CtrlCaret)
 		case "ctrl-/", "ctrl-_":
@@ -619,6 +634,10 @@ func parseKeyChordsImpl(str string, message string, exit func(string)) map[tui.E
 			add(tui.Load)
 		case "focus":
 			add(tui.Focus)
+		case "one":
+			add(tui.One)
+		case "zero":
+			add(tui.Zero)
 		case "alt-enter", "alt-return":
 			chords[tui.CtrlAltKey('m')] = key
 		case "alt-space":
@@ -667,6 +686,8 @@ func parseKeyChordsImpl(str string, message string, exit func(string)) map[tui.E
 			add(tui.SLeft)
 		case "shift-right":
 			add(tui.SRight)
+		case "shift-delete":
+			add(tui.SDelete)
 		case "left-click":
 			add(tui.LeftClick)
 		case "right-click":
@@ -873,10 +894,14 @@ func parseTheme(defaultTheme *tui.ColorTheme, str string) *tui.ColorTheme {
 				mergeAttr(&theme.CurrentMatch)
 			case "border":
 				mergeAttr(&theme.Border)
+			case "preview-border":
+				mergeAttr(&theme.PreviewBorder)
 			case "separator":
 				mergeAttr(&theme.Separator)
 			case "scrollbar":
 				mergeAttr(&theme.Scrollbar)
+			case "preview-scrollbar":
+				mergeAttr(&theme.PreviewScrollbar)
 			case "label":
 				mergeAttr(&theme.BorderLabel)
 			case "preview-label":
@@ -922,7 +947,7 @@ const (
 
 func init() {
 	executeRegexp = regexp.MustCompile(
-		`(?si)[:+](become|execute(?:-multi|-silent)?|reload(?:-sync)?|preview|(?:change|transform)-(?:query|prompt|border-label|preview-label)|change-preview-window|change-preview|(?:re|un)bind|pos|put)`)
+		`(?si)[:+](become|execute(?:-multi|-silent)?|reload(?:-sync)?|preview|(?:change|transform)-(?:header|query|prompt|border-label|preview-label)|change-preview-window|change-preview|(?:re|un)bind|pos|put)`)
 	splitRegexp = regexp.MustCompile("[,:]+")
 	actionNameRegexp = regexp.MustCompile("(?i)^[a-z-]+")
 }
@@ -1078,6 +1103,10 @@ func parseActionList(masked string, original string, prevActions []*action, putA
 			appendAction(actToggleAll)
 		case "toggle-search":
 			appendAction(actToggleSearch)
+		case "toggle-track":
+			appendAction(actToggleTrack)
+		case "track":
+			appendAction(actTrack)
 		case "select":
 			appendAction(actSelect)
 		case "select-all":
@@ -1242,6 +1271,8 @@ func isExecuteAction(str string) actionType {
 		return actPreview
 	case "change-border-label":
 		return actChangeBorderLabel
+	case "change-header":
+		return actChangeHeader
 	case "change-preview-label":
 		return actChangePreviewLabel
 	case "change-preview-window":
@@ -1266,6 +1297,8 @@ func isExecuteAction(str string) actionType {
 		return actTransformBorderLabel
 	case "transform-preview-label":
 		return actTransformPreviewLabel
+	case "transform-header":
+		return actTransformHeader
 	case "transform-prompt":
 		return actTransformPrompt
 	case "transform-query":
@@ -1403,6 +1436,8 @@ func parsePreviewWindowImpl(opts *previewOpts, input string, exit func(string))
 			opts.border = tui.BorderSharp
 		case "border-bold":
 			opts.border = tui.BorderBold
+		case "border-block":
+			opts.border = tui.BorderBlock
 		case "border-double":
 			opts.border = tui.BorderDouble
 		case "noborder", "border-none":
@@ -1562,6 +1597,10 @@ func parseOptions(opts *Options, allArgs []string) {
 			opts.Sort = optionalNumeric(allArgs, &i, 1)
 		case "+s", "--no-sort":
 			opts.Sort = 0
+		case "--track":
+			opts.Track = trackEnabled
+		case "--no-track":
+			opts.Track = trackDisabled
 		case "--tac":
 			opts.Tac = true
 		case "--no-tac":
@@ -1756,9 +1795,10 @@ func parseOptions(opts *Options, allArgs []string) {
 		case "--tabstop":
 			opts.Tabstop = nextInt(allArgs, &i, "tab stop required")
 		case "--listen":
-			opts.ListenPort = nextInt(allArgs, &i, "listen port required")
+			port := optionalNumeric(allArgs, &i, 0)
+			opts.ListenPort = &port
 		case "--no-listen":
-			opts.ListenPort = 0
+			opts.ListenPort = nil
 		case "--clear":
 			opts.ClearOnExit = true
 		case "--no-clear":
@@ -1849,7 +1889,8 @@ func parseOptions(opts *Options, allArgs []string) {
 			} else if match, value := optString(arg, "--tabstop="); match {
 				opts.Tabstop = atoi(value)
 			} else if match, value := optString(arg, "--listen="); match {
-				opts.ListenPort = atoi(value)
+				port := atoi(value)
+				opts.ListenPort = &port
 			} else if match, value := optString(arg, "--hscroll-off="); match {
 				opts.HscrollOff = atoi(value)
 			} else if match, value := optString(arg, "--scroll-off="); match {
@@ -1879,7 +1920,7 @@ func parseOptions(opts *Options, allArgs []string) {
 		errorExit("tab stop must be a positive integer")
 	}
 
-	if opts.ListenPort < 0 || opts.ListenPort > 65535 {
+	if opts.ListenPort != nil && (*opts.ListenPort < 0 || *opts.ListenPort > 65535) {
 		errorExit("invalid listen port")
 	}
 
@@ -1923,8 +1964,16 @@ func postProcessOptions(opts *Options) {
 		errorExit("--height option is currently not supported on this platform")
 	}
 
-	if opts.Scrollbar != nil && runewidth.StringWidth(*opts.Scrollbar) > 1 {
+	if opts.Scrollbar != nil {
-		errorExit("scrollbar display width should be 1")
+		runes := []rune(*opts.Scrollbar)
+		if len(runes) > 2 {
+			errorExit("--scrollbar should be given one or two characters")
+		}
+		for _, r := range runes {
+			if runewidth.RuneWidth(r) != 1 {
+				errorExit("scrollbar display width should be 1")
+			}
+		}
 	}
 
 	// Default actions for CTRL-N / CTRL-P when --history is set
@@ -1940,25 +1989,25 @@ func postProcessOptions(opts *Options) {
 	// Extend the default key map
 	keymap := defaultKeymap()
 	for key, actions := range opts.Keymap {
-		var lastChangePreviewWindow *action
+		reordered := []*action{}
 		for _, act := range actions {
 			switch act.t {
 			case actToggleSort:
 				// To display "+S"/"-S" on info line
 				opts.ToggleSort = true
-			case actChangePreviewWindow:
+			case actTogglePreview, actShowPreview, actHidePreview, actChangePreviewWindow:
-				lastChangePreviewWindow = act
+				reordered = append(reordered, act)
 			}
 		}
 
-		// Re-organize actions so that we only keep the last change-preview-window
+		// Re-organize actions so that we put actions that change the preview window first in the list.
-		// and it comes first in the list.
 		//  *  change-preview-window(up,+10)+preview(sleep 3; cat {})+change-preview-window(up,+20)
-		//  -> change-preview-window(up,+20)+preview(sleep 3; cat {})
+		//  -> change-preview-window(up,+10)+change-preview-window(up,+20)+preview(sleep 3; cat {})
-		if lastChangePreviewWindow != nil {
+		if len(reordered) > 0 {
-			reordered := []*action{lastChangePreviewWindow}
 			for _, act := range actions {
-				if act.t != actChangePreviewWindow {
+				switch act.t {
+				case actTogglePreview, actShowPreview, actHidePreview, actChangePreviewWindow:
+				default:
 					reordered = append(reordered, act)
 				}
 			}
@@ -2001,9 +2050,7 @@ func postProcessOptions(opts *Options) {
 		theme := opts.Theme
 		boldify := func(c tui.ColorAttr) tui.ColorAttr {
 			dup := c
-			if !theme.Colored {
+			if (c.Attr & tui.AttrRegular) == 0 {
-				dup.Attr |= tui.Bold
-			} else if (c.Attr & tui.AttrRegular) == 0 {
 				dup.Attr |= tui.Bold
 			}
 			return dup

src/server.go

@@ -19,14 +19,26 @@ const (
 	maxContentLength = 1024 * 1024
 )
 
-func startHttpServer(port int, channel chan []*action) error {
+func startHttpServer(port int, channel chan []*action) (error, int) {
-	if port == 0 {
+	if port < 0 {
-		return nil
+		return nil, port
 	}
 
 	listener, err := net.Listen("tcp", fmt.Sprintf("localhost:%d", port))
 	if err != nil {
-		return fmt.Errorf("port not available: %d", port)
+		return fmt.Errorf("port not available: %d", port), port
+	}
+	if port == 0 {
+		addr := listener.Addr().String()
+		parts := strings.SplitN(addr, ":", 2)
+		if len(parts) < 2 {
+			return fmt.Errorf("cannot extract port: %s", addr), port
+		}
+		var err error
+		port, err = strconv.Atoi(parts[1])
+		if err != nil {
+			return err, port
+		}
 	}
 
 	go func() {
@@ -45,7 +57,7 @@ func startHttpServer(port int, channel chan []*action) error {
 		listener.Close()
 	}()
 
-	return nil
+	return nil, port
 }
 
 // Here we are writing a simplistic HTTP server without using net/http

src/terminal.go

@@ -3,6 +3,7 @@ package fzf
 import (
 	"bufio"
 	"fmt"
+	"io"
 	"io/ioutil"
 	"math"
 	"os"
@@ -183,6 +184,7 @@ type Terminal struct {
 	multi              int
 	sort               bool
 	toggleSort         bool
+	track              trackOption
 	delimiter          Delimiter
 	expect             map[tui.Event]string
 	keymap             map[tui.Event][]*action
@@ -197,13 +199,13 @@ type Terminal struct {
 	header0            []string
 	ellipsis           string
 	scrollbar          string
+	previewScrollbar   string
 	ansi               bool
 	tabstop            int
 	margin             [4]sizeSpec
 	padding            [4]sizeSpec
-	strong             tui.Attr
 	unicode            bool
-	listenPort         int
+	listenPort         *int
 	borderShape        tui.BorderShape
 	cleanExit          bool
 	paused             bool
@@ -310,6 +312,7 @@ const (
 	actBackwardWord
 	actCancel
 	actChangeBorderLabel
+	actChangeHeader
 	actChangePreviewLabel
 	actChangePrompt
 	actChangeQuery
@@ -337,6 +340,8 @@ const (
 	actToggleUp
 	actToggleIn
 	actToggleOut
+	actToggleTrack
+	actTrack
 	actDown
 	actUp
 	actPageUp
@@ -355,6 +360,7 @@ const (
 	actTogglePreview
 	actTogglePreviewWrap
 	actTransformBorderLabel
+	actTransformHeader
 	actTransformPreviewLabel
 	actTransformPrompt
 	actTransformQuery
@@ -403,6 +409,7 @@ type searchRequest struct {
 	sort    bool
 	sync    bool
 	command *string
+	changed bool
 }
 
 type previewRequest struct {
@@ -538,13 +545,9 @@ func NewTerminal(opts *Options, eventBox *util.EventBox) *Terminal {
 	}
 	var previewBox *util.EventBox
 	// We need to start previewer if HTTP server is enabled even when --preview option is not specified
-	if len(opts.Preview.command) > 0 || hasPreviewAction(opts) || opts.ListenPort > 0 {
+	if len(opts.Preview.command) > 0 || hasPreviewAction(opts) || opts.ListenPort != nil {
 		previewBox = util.NewEventBox()
 	}
-	strongAttr := tui.Bold
-	if !opts.Bold {
-		strongAttr = tui.AttrRegular
-	}
 	var renderer tui.Renderer
 	fullscreen := !opts.Height.auto && (opts.Height.size == 0 || opts.Height.percent && opts.Height.size == 100)
 	if fullscreen {
@@ -604,6 +607,7 @@ func NewTerminal(opts *Options, eventBox *util.EventBox) *Terminal {
 		multi:              opts.Multi,
 		sort:               opts.Sort > 0,
 		toggleSort:         opts.ToggleSort,
+		track:              opts.Track,
 		delimiter:          opts.Delimiter,
 		expect:             opts.Expect,
 		keymap:             opts.Keymap,
@@ -623,11 +627,10 @@ func NewTerminal(opts *Options, eventBox *util.EventBox) *Terminal {
 		previewLabelOpts:   opts.PreviewLabel,
 		cleanExit:          opts.ClearOnExit,
 		paused:             opts.Phony,
-		strong:             strongAttr,
 		cycle:              opts.Cycle,
 		headerFirst:        opts.HeaderFirst,
 		headerLines:        opts.HeaderLines,
-		header:             header,
+		header:             []string{},
 		header0:            header,
 		ellipsis:           opts.Ellipsis,
 		ansi:               opts.Ansi,
@@ -688,22 +691,42 @@ func NewTerminal(opts *Options, eventBox *util.EventBox) *Terminal {
 		} else {
 			t.scrollbar = "|"
 		}
+		t.previewScrollbar = t.scrollbar
 	} else {
-		t.scrollbar = *opts.Scrollbar
+		runes := []rune(*opts.Scrollbar)
+		if len(runes) > 0 {
+			t.scrollbar = string(runes[0])
+			t.previewScrollbar = t.scrollbar
+			if len(runes) > 1 {
+				t.previewScrollbar = string(runes[1])
+			}
+		}
 	}
 
 	_, t.hasLoadActions = t.keymap[tui.Load.AsEvent()]
 
-	if err := startHttpServer(t.listenPort, t.serverChan); err != nil {
+	if t.listenPort != nil {
-		errorExit(err.Error())
+		err, port := startHttpServer(*t.listenPort, t.serverChan)
+		if err != nil {
+			errorExit(err.Error())
+		}
+		t.listenPort = &port
 	}
 
 	return &t
 }
 
+func (t *Terminal) environ() []string {
+	env := os.Environ()
+	if t.listenPort != nil {
+		env = append(env, fmt.Sprintf("FZF_PORT=%d", *t.listenPort))
+	}
+	return env
+}
+
 func borderLines(shape tui.BorderShape) int {
 	switch shape {
-	case tui.BorderHorizontal, tui.BorderRounded, tui.BorderSharp, tui.BorderBold, tui.BorderDouble:
+	case tui.BorderHorizontal, tui.BorderRounded, tui.BorderSharp, tui.BorderBold, tui.BorderBlock, tui.BorderDouble:
 		return 2
 	case tui.BorderTop, tui.BorderBottom:
 		return 1
@@ -740,7 +763,7 @@ func (t *Terminal) ansiLabelPrinter(str string, color *tui.ColorPair, fill bool)
 
 	// Simpler printer for strings without ANSI colors or tab characters
 	if colors == nil && strings.IndexRune(str, '\t') < 0 {
-		length := runewidth.StringWidth(str)
+		length := util.StringWidth(str)
 		if length == 0 {
 			return nil, 0
 		}
@@ -874,10 +897,21 @@ func reverseStringArray(input []string) []string {
 	return reversed
 }
 
+func (t *Terminal) changeHeader(header string) bool {
+	lines := strings.Split(strings.TrimSuffix(header, "\n"), "\n")
+	switch t.layout {
+	case layoutDefault, layoutReverseList:
+		lines = reverseStringArray(lines)
+	}
+	needFullRedraw := len(t.header0) != len(lines)
+	t.header0 = lines
+	return needFullRedraw
+}
+
 // UpdateHeader updates the header
 func (t *Terminal) UpdateHeader(header []string) {
 	t.mutex.Lock()
-	t.header = append(append([]string{}, t.header0...), header...)
+	t.header = header
 	t.mutex.Unlock()
 	t.reqBox.Set(reqHeader, nil)
 }
@@ -898,16 +932,54 @@ func (t *Terminal) UpdateProgress(progress float32) {
 // UpdateList updates Merger to display the list
 func (t *Terminal) UpdateList(merger *Merger, reset bool) {
 	t.mutex.Lock()
+	var prevIndex int32 = -1
+	if !reset && t.track != trackDisabled {
+		if t.merger.Length() > 0 {
+			prevIndex = t.merger.Get(t.cy).item.Index()
+		} else if merger.Length() > 0 {
+			prevIndex = merger.First().item.Index()
+		}
+	}
 	t.progress = 100
 	t.merger = merger
 	if reset {
 		t.selected = make(map[int32]selectedItem)
 		t.version++
 	}
-	if t.hasLoadActions && t.triggerLoad {
+	if t.triggerLoad {
 		t.triggerLoad = false
 		t.eventChan <- tui.Load.AsEvent()
 	}
+	if prevIndex >= 0 {
+		pos := t.cy - t.offset
+		count := t.merger.Length()
+		i := t.merger.FindIndex(prevIndex)
+		if i >= 0 {
+			t.cy = i
+			t.offset = t.cy - pos
+		} else if t.track == trackCurrent {
+			t.track = trackDisabled
+			t.cy = pos
+			t.offset = 0
+		} else if t.cy > count {
+			// Try to keep the vertical position when the list shrinks
+			t.cy = count - util.Min(count, t.maxItems()) + pos
+		}
+	}
+	if !t.reading {
+		switch t.merger.Length() {
+		case 0:
+			zero := tui.Zero.AsEvent()
+			if _, prs := t.keymap[zero]; prs {
+				t.eventChan <- zero
+			}
+		case 1:
+			one := tui.One.AsEvent()
+			if _, prs := t.keymap[one]; prs {
+				t.eventChan <- one
+			}
+		}
+	}
 	t.mutex.Unlock()
 	t.reqBox.Set(reqInfo, nil)
 	t.reqBox.Set(reqList, nil)
@@ -1010,7 +1082,7 @@ func (t *Terminal) adjustMarginAndPadding() (int, int, [4]int, [4]int) {
 			if idx == 3 {
 				extraMargin[idx] += 1 + bw
 			}
-		case tui.BorderRounded, tui.BorderSharp, tui.BorderBold, tui.BorderDouble:
+		case tui.BorderRounded, tui.BorderSharp, tui.BorderBold, tui.BorderBlock, tui.BorderDouble:
 			extraMargin[idx] += 1 + bw*(idx%2)
 		}
 		marginInt[idx] = sizeSpecToInt(idx, sizeSpec) + extraMargin[idx]
@@ -1103,7 +1175,7 @@ func (t *Terminal) resizeWindows(forcePreview bool) {
 		t.border = t.tui.NewWindow(
 			marginInt[0], marginInt[3], width+(1+bw), height,
 			false, tui.MakeBorderStyle(tui.BorderRight, t.unicode))
-	case tui.BorderRounded, tui.BorderSharp, tui.BorderBold, tui.BorderDouble:
+	case tui.BorderRounded, tui.BorderSharp, tui.BorderBold, tui.BorderBlock, tui.BorderDouble:
 		t.border = t.tui.NewWindow(
 			marginInt[0]-1, marginInt[3]-(1+bw), width+(1+bw)*2, height+2,
 			false, tui.MakeBorderStyle(t.borderShape, t.unicode))
@@ -1137,7 +1209,7 @@ func (t *Terminal) resizeWindows(forcePreview bool) {
 				}
 				t.pborder = t.tui.NewWindow(y, x, w, h, true, previewBorder)
 				switch previewOpts.border {
-				case tui.BorderSharp, tui.BorderRounded, tui.BorderBold, tui.BorderDouble:
+				case tui.BorderSharp, tui.BorderRounded, tui.BorderBold, tui.BorderBlock, tui.BorderDouble:
 					pwidth -= (1 + bw) * 2
 					pheight -= 2
 					x += 1 + bw
@@ -1163,6 +1235,8 @@ func (t *Terminal) resizeWindows(forcePreview bool) {
 					// Need a column to show scrollbar
 					pwidth -= 1
 				}
+				pwidth = util.Max(0, pwidth)
+				pheight = util.Max(0, pheight)
 				t.pwindow = t.tui.NewWindow(y, x, pwidth, pheight, true, noBorder)
 			}
 			verticalPad := 2
@@ -1279,7 +1353,7 @@ func (t *Terminal) printLabel(window tui.Window, render labelPrinter, opts label
 	}
 
 	switch borderShape {
-	case tui.BorderHorizontal, tui.BorderTop, tui.BorderBottom, tui.BorderRounded, tui.BorderSharp, tui.BorderBold, tui.BorderDouble:
+	case tui.BorderHorizontal, tui.BorderTop, tui.BorderBottom, tui.BorderRounded, tui.BorderSharp, tui.BorderBold, tui.BorderBlock, tui.BorderDouble:
 		if redrawBorder {
 			window.DrawHBorder()
 		}
@@ -1310,7 +1384,7 @@ func (t *Terminal) move(y int, x int, clear bool) {
 	case layoutDefault:
 		y = h - y - 1
 	case layoutReverseList:
-		n := 2 + len(t.header)
+		n := 2 + len(t.header0) + len(t.header)
 		if t.noInfoLine() {
 			n--
 		}
@@ -1338,8 +1412,7 @@ func (t *Terminal) updatePromptOffset() ([]rune, []rune) {
 
 	_, overflow := t.trimLeft(t.input[:t.cx], maxWidth)
 	minOffset := int(overflow)
-	maxOffset := util.Min(util.Min(len(t.input), minOffset+maxWidth), t.cx)
+	maxOffset := minOffset + (maxWidth-util.Max(0, maxWidth-t.cx))/2
-
 	t.xoffset = util.Constrain(t.xoffset, minOffset, maxOffset)
 	before, _ := t.trimLeft(t.input[t.xoffset:t.cx], maxWidth)
 	beforeLen := t.displayWidth(before)
@@ -1404,7 +1477,7 @@ func (t *Terminal) printInfo() {
 		pos = t.promptLen + t.queryLen[0] + t.queryLen[1] + 1
 		str := t.infoSep
 		maxWidth := t.window.Width() - pos
-		width := runewidth.StringWidth(str)
+		width := util.StringWidth(str)
 		if width > maxWidth {
 			trimmed, _ := t.trimRight([]rune(str), maxWidth)
 			str = string(trimmed)
@@ -1431,6 +1504,9 @@ func (t *Terminal) printInfo() {
 			output += " -S"
 		}
 	}
+	if t.track != trackDisabled {
+		output += " +T"
+	}
 	if t.multi > 0 {
 		if t.multi == maxMulti {
 			output += fmt.Sprintf(" (%d)", len(t.selected))
@@ -1456,7 +1532,7 @@ func (t *Terminal) printInfo() {
 }
 
 func (t *Terminal) printHeader() {
-	if len(t.header) == 0 {
+	if len(t.header0)+len(t.header) == 0 {
 		return
 	}
 	max := t.window.Height()
@@ -1467,7 +1543,7 @@ func (t *Terminal) printHeader() {
 		}
 	}
 	var state *ansiState
-	for idx, lineStr := range t.header {
+	for idx, lineStr := range append(append([]string{}, t.header0...), t.header...) {
 		line := idx
 		if !t.headerFirst {
 			line++
@@ -1501,7 +1577,7 @@ func (t *Terminal) printList() {
 		if t.layout == layoutDefault {
 			i = maxy - 1 - j
 		}
-		line := i + 2 + len(t.header)
+		line := i + 2 + len(t.header0) + len(t.header)
 		if t.noInfoLine() {
 			line--
 		}
@@ -1807,7 +1883,7 @@ func (t *Terminal) renderPreviewText(height int, lines []string, lineNo int, unc
 		if ansi != nil {
 			ansi.lbg = -1
 		}
-		line = strings.TrimSuffix(line, "\n")
+		line = strings.TrimRight(line, "\r\n")
 		if lineNo >= height || t.pwindow.Y() == height-1 && t.pwindow.X() > 0 {
 			t.previewed.filled = true
 			t.previewer.scrollable = true
@@ -1829,12 +1905,14 @@ func (t *Terminal) renderPreviewText(height int, lines []string, lineNo int, unc
 					trimmed, isTrimmed = t.trimRight(trimmed, maxWidth-t.pwindow.X())
 				}
 				str, width := t.processTabs(trimmed, prefixWidth)
-				prefixWidth += width
+				if width > prefixWidth {
-				if t.theme.Colored && ansi != nil && ansi.colored() {
+					prefixWidth = width
-					lbg = ansi.lbg
+					if t.theme.Colored && ansi != nil && ansi.colored() {
-					fillRet = t.pwindow.CFill(ansi.fg, ansi.bg, ansi.attr, str)
+						lbg = ansi.lbg
-				} else {
+						fillRet = t.pwindow.CFill(ansi.fg, ansi.bg, ansi.attr, str)
-					fillRet = t.pwindow.CFill(tui.ColPreview.Fg(), tui.ColPreview.Bg(), tui.AttrRegular, str)
+					} else {
+						fillRet = t.pwindow.CFill(tui.ColPreview.Fg(), tui.ColPreview.Bg(), tui.AttrRegular, str)
+					}
 				}
 				return !isTrimmed &&
 					(fillRet == tui.FillContinue || t.previewOpts.wrap && fillRet == tui.FillNextLine)
@@ -1863,7 +1941,9 @@ func (t *Terminal) renderPreviewText(height int, lines []string, lineNo int, unc
 func (t *Terminal) renderPreviewScrollbar(yoff int, barLength int, barStart int) {
 	height := t.pwindow.Height()
 	w := t.pborder.Width()
+	redraw := false
 	if len(t.previewer.bar) != height {
+		redraw = true
 		t.previewer.bar = make([]bool, height)
 	}
 	xshift := -1 - t.borderWidth
@@ -1880,22 +1960,22 @@ func (t *Terminal) renderPreviewScrollbar(yoff int, barLength int, barStart int)
 
 		// Avoid unnecessary redraws
 		bar := i >= yoff+barStart && i < yoff+barStart+barLength
-		if bar == t.previewer.bar[i] && !t.tui.NeedScrollbarRedraw() {
+		if !redraw && bar == t.previewer.bar[i] && !t.tui.NeedScrollbarRedraw() {
 			continue
 		}
 
 		t.previewer.bar[i] = bar
 		t.pborder.Move(y, x)
 		if i >= yoff+barStart && i < yoff+barStart+barLength {
-			t.pborder.CPrint(tui.ColScrollbar, t.scrollbar)
+			t.pborder.CPrint(tui.ColPreviewScrollbar, t.previewScrollbar)
 		} else {
-			t.pborder.Print(" ")
+			t.pborder.CPrint(tui.ColPreviewScrollbar, " ")
 		}
 	}
 }
 
 func (t *Terminal) printPreview() {
-	if !t.hasPreviewWindow() {
+	if !t.hasPreviewWindow() || t.pwindow.Height() == 0 {
 		return
 	}
 	numLines := len(t.previewer.lines)
@@ -1937,7 +2017,7 @@ func (t *Terminal) processTabs(runes []rune, prefixWidth int) (string, int) {
 			w = t.tabstop - l%t.tabstop
 			strbuf.WriteString(strings.Repeat(" ", w))
 		} else {
-			w = runewidth.StringWidth(str)
+			w = util.StringWidth(str)
 			strbuf.WriteString(str)
 		}
 		l += w
@@ -2237,16 +2317,17 @@ func (t *Terminal) redraw() {
 	t.printAll()
 }
 
-func (t *Terminal) executeCommand(template string, forcePlus bool, background bool, captureFirstLine bool) string {
+func (t *Terminal) executeCommand(template string, forcePlus bool, background bool, capture bool, firstLineOnly bool) string {
 	line := ""
 	valid, list := t.buildPlusList(template, forcePlus)
-	// captureFirstLine is used for transform-{prompt,query} and we don't want to
+	// 'capture' is used for transform-* and we don't want to
 	// return an empty string in those cases
-	if !valid && !captureFirstLine {
+	if !valid && !capture {
 		return line
 	}
 	command := t.replacePlaceholder(template, forcePlus, string(t.input), list)
 	cmd := util.ExecCommand(command, false)
+	cmd.Env = t.environ()
 	t.executing.Set(true)
 	if !background {
 		cmd.Stdin = tui.TtyIn()
@@ -2258,12 +2339,17 @@ func (t *Terminal) executeCommand(template string, forcePlus bool, background bo
 		t.redraw()
 		t.refresh()
 	} else {
-		if captureFirstLine {
+		if capture {
 			out, _ := cmd.StdoutPipe()
 			reader := bufio.NewReader(out)
 			cmd.Start()
-			line, _ = reader.ReadString('\n')
+			if firstLineOnly {
-			line = strings.TrimRight(line, "\r\n")
+				line, _ = reader.ReadString('\n')
+				line = strings.TrimRight(line, "\r\n")
+			} else {
+				bytes, _ := io.ReadAll(reader)
+				line = string(bytes)
+			}
 			cmd.Wait()
 		} else {
 			cmd.Run()
@@ -2493,17 +2579,17 @@ func (t *Terminal) Loop() {
 					_, query := t.Input()
 					command := t.replacePlaceholder(commandTemplate, false, string(query), items)
 					cmd := util.ExecCommand(command, true)
+					env := t.environ()
 					if pwindow != nil {
 						height := pwindow.Height()
-						env := os.Environ()
 						lines := fmt.Sprintf("LINES=%d", height)
 						columns := fmt.Sprintf("COLUMNS=%d", pwindow.Width())
 						env = append(env, lines)
 						env = append(env, "FZF_PREVIEW_"+lines)
 						env = append(env, columns)
 						env = append(env, "FZF_PREVIEW_"+columns)
-						cmd.Env = env
 					}
+					cmd.Env = env
 
 					out, _ := cmd.StdoutPipe()
 					cmd.Stderr = cmd.Stdout
@@ -2633,11 +2719,6 @@ func (t *Terminal) Loop() {
 		}
 	}
 
-	var onFocus []*action
-	if actions, prs := t.keymap[tui.Focus.AsEvent()]; prs {
-		onFocus = actions
-	}
-
 	go func() {
 		var focusedIndex int32 = minItem.Index()
 		var version int64 = -1
@@ -2674,7 +2755,11 @@ func (t *Terminal) Loop() {
 							currentIndex = currentItem.Index()
 						}
 						focusChanged := focusedIndex != currentIndex
-						if onFocus != nil && focusChanged {
+						if focusChanged && t.track == trackCurrent {
+							t.track = trackDisabled
+							t.printInfo()
+						}
+						if onFocus, prs := t.keymap[tui.Focus.AsEvent()]; prs && focusChanged {
 							t.serverChan <- onFocus
 						}
 						if focusChanged || version != t.version {
@@ -2786,7 +2871,7 @@ func (t *Terminal) Loop() {
 			}
 			select {
 			case event = <-t.eventChan:
-				needBarrier = event != tui.Load.AsEvent()
+				needBarrier = !event.Is(tui.Load, tui.One, tui.Zero)
 			case actions = <-t.serverChan:
 				event = tui.Invalid.AsEvent()
 				needBarrier = false
@@ -2876,14 +2961,22 @@ func (t *Terminal) Loop() {
 						if t.history != nil {
 							t.history.append(string(t.input))
 						}
+						/*
+							FIXME: It is not at all clear why this is required.
+							The following command will report 'not a tty', unless we open
+							/dev/tty *twice* after closing the standard input for 'reload'
+							in Reader.terminate().
+								: | fzf --bind 'start:reload:ls' --bind 'enter:become:tty'
+						*/
+						tui.TtyIn()
 						util.SetStdin(tui.TtyIn())
 						syscall.Exec(shellPath, []string{shell, "-c", command}, os.Environ())
 					}
 				}
 			case actExecute, actExecuteSilent:
-				t.executeCommand(a.a, false, a.t == actExecuteSilent, false)
+				t.executeCommand(a.a, false, a.t == actExecuteSilent, false, false)
 			case actExecuteMulti:
-				t.executeCommand(a.a, true, false, false)
+				t.executeCommand(a.a, true, false, false, false)
 			case actInvalid:
 				t.mutex.Unlock()
 				return false
@@ -2917,11 +3010,11 @@ func (t *Terminal) Loop() {
 					req(reqPreviewRefresh)
 				}
 			case actTransformPrompt:
-				prompt := t.executeCommand(a.a, false, true, true)
+				prompt := t.executeCommand(a.a, false, true, true, true)
 				t.prompt, t.promptLen = t.parsePrompt(prompt)
 				req(reqPrompt)
 			case actTransformQuery:
-				query := t.executeCommand(a.a, false, true, true)
+				query := t.executeCommand(a.a, false, true, true, true)
 				t.input = []rune(query)
 				t.cx = len(t.input)
 			case actToggleSort:
@@ -2970,6 +3063,19 @@ func (t *Terminal) Loop() {
 			case actChangeQuery:
 				t.input = []rune(a.a)
 				t.cx = len(t.input)
+			case actTransformHeader:
+				header := t.executeCommand(a.a, false, true, true, false)
+				if t.changeHeader(header) {
+					req(reqFullRedraw)
+				} else {
+					req(reqHeader)
+				}
+			case actChangeHeader:
+				if t.changeHeader(a.a) {
+					req(reqFullRedraw)
+				} else {
+					req(reqHeader)
+				}
 			case actChangeBorderLabel:
 				if t.border != nil {
 					t.borderLabel, t.borderLabelLen = t.ansiLabelPrinter(a.a, &tui.ColBorderLabel, false)
@@ -2982,13 +3088,13 @@ func (t *Terminal) Loop() {
 				}
 			case actTransformBorderLabel:
 				if t.border != nil {
-					label := t.executeCommand(a.a, false, true, true)
+					label := t.executeCommand(a.a, false, true, true, true)
 					t.borderLabel, t.borderLabelLen = t.ansiLabelPrinter(label, &tui.ColBorderLabel, false)
 					req(reqRedrawBorderLabel)
 				}
 			case actTransformPreviewLabel:
 				if t.pborder != nil {
-					label := t.executeCommand(a.a, false, true, true)
+					label := t.executeCommand(a.a, false, true, true, true)
 					t.previewLabel, t.previewLabelLen = t.ansiLabelPrinter(label, &tui.ColPreviewLabel, false)
 					req(reqRedrawPreviewLabel)
 				}
@@ -3238,6 +3344,19 @@ func (t *Terminal) Loop() {
 				t.paused = !t.paused
 				changed = !t.paused
 				req(reqPrompt)
+			case actToggleTrack:
+				switch t.track {
+				case trackEnabled:
+					t.track = trackDisabled
+				case trackDisabled:
+					t.track = trackEnabled
+				}
+				req(reqInfo)
+			case actTrack:
+				if t.track == trackDisabled {
+					t.track = trackCurrent
+				}
+				req(reqInfo)
 			case actEnableSearch:
 				t.paused = false
 				changed = true
@@ -3289,7 +3408,7 @@ func (t *Terminal) Loop() {
 					break
 				}
 
-				// Prevew scrollbar dragging
+				// Preview scrollbar dragging
 				headerLines := t.previewOpts.headerLines
 				pbarDragging = me.Down && (pbarDragging || clicked && t.hasPreviewWindow() && my >= t.pwindow.Top()+headerLines && my < t.pwindow.Top()+t.pwindow.Height() && mx == t.pwindow.Left()+t.pwindow.Width())
 				if pbarDragging {
@@ -3315,7 +3434,7 @@ func (t *Terminal) Loop() {
 				// Translate coordinates
 				mx -= t.window.Left()
 				my -= t.window.Top()
-				min := 2 + len(t.header)
+				min := 2 + len(t.header0) + len(t.header)
 				if t.noInfoLine() {
 					min--
 				}
@@ -3420,6 +3539,9 @@ func (t *Terminal) Loop() {
 
 				// Split window options
 				tokens := strings.Split(a.a, "|")
+				if len(tokens[0]) > 0 && t.initialPreviewOpts.hidden {
+					t.previewOpts.hidden = false
+				}
 				parsePreviewWindow(&t.previewOpts, tokens[0])
 				if len(tokens) > 1 {
 					a.a = strings.Join(append(tokens[1:], tokens[0]), "|")
@@ -3520,7 +3642,7 @@ func (t *Terminal) Loop() {
 		t.mutex.Unlock() // Must be unlocked before touching reqBox
 
 		if changed || newCommand != nil {
-			t.eventBox.Set(EvtSearchNew, searchRequest{sort: t.sort, sync: reloadSync, command: newCommand})
+			t.eventBox.Set(EvtSearchNew, searchRequest{sort: t.sort, sync: reloadSync, command: newCommand, changed: changed})
 		}
 		for _, event := range events {
 			t.reqBox.Set(event, nil)
@@ -3584,7 +3706,7 @@ func (t *Terminal) vset(o int) bool {
 }
 
 func (t *Terminal) maxItems() int {
-	max := t.window.Height() - 2 - len(t.header)
+	max := t.window.Height() - 2 - len(t.header0) - len(t.header)
 	if t.noInfoLine() {
 		max++
 	}

src/tui/light.go

@@ -32,20 +32,26 @@ var offsetRegexp *regexp.Regexp = regexp.MustCompile("(.*)\x1b\\[([0-9]+);([0-9]
 var offsetRegexpBegin *regexp.Regexp = regexp.MustCompile("^\x1b\\[[0-9]+;[0-9]+R")
 
 func (r *LightRenderer) stderr(str string) {
-	r.stderrInternal(str, true)
+	r.stderrInternal(str, true, "")
 }
 
-// FIXME: Need better handling of non-displayable characters
+const CR string = "\x1b[2m␍"
-func (r *LightRenderer) stderrInternal(str string, allowNLCR bool) {
+const LF string = "\x1b[2m␊"
+
+func (r *LightRenderer) stderrInternal(str string, allowNLCR bool, resetCode string) {
 	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 {
+			if nlcr && !allowNLCR {
-				runes = append(runes, ' ')
+				if r == '\r' {
-			} else {
+					runes = append(runes, []rune(CR+resetCode)...)
+				} else {
+					runes = append(runes, []rune(LF+resetCode)...)
+				}
+			} else if r != utf8.RuneError {
 				runes = append(runes, r)
 			}
 		}
@@ -54,8 +60,10 @@ func (r *LightRenderer) stderrInternal(str string, allowNLCR bool) {
 	r.queued.WriteString(string(runes))
 }
 
-func (r *LightRenderer) csi(code string) {
+func (r *LightRenderer) csi(code string) string {
-	r.stderr("\x1b[" + code)
+	fullcode := "\x1b[" + code
+	r.stderr(fullcode)
+	return fullcode
 }
 
 func (r *LightRenderer) flush() {
@@ -422,7 +430,19 @@ func (r *LightRenderer) escSequence(sz *int) Event {
 				}
 				return Event{Invalid, 0, nil} // INS
 			case '3':
-				return Event{Del, 0, nil}
+				if r.buffer[3] == '~' {
+					return Event{Del, 0, nil}
+				}
+				if len(r.buffer) == 6 && r.buffer[5] == '~' {
+					*sz = 6
+					switch r.buffer[4] {
+					case '5':
+						return Event{CtrlDelete, 0, nil}
+					case '2':
+						return Event{SDelete, 0, nil}
+					}
+				}
+				return Event{Invalid, 0, nil}
 			case '4':
 				return Event{End, 0, nil}
 			case '5':
@@ -737,7 +757,7 @@ func (w *LightWindow) DrawHBorder() {
 
 func (w *LightWindow) drawBorder(onlyHorizontal bool) {
 	switch w.border.shape {
-	case BorderRounded, BorderSharp, BorderBold, BorderDouble:
+	case BorderRounded, BorderSharp, BorderBold, BorderBlock, BorderDouble:
 		w.drawBorderAround(onlyHorizontal)
 	case BorderHorizontal:
 		w.drawBorderHorizontal(true, true)
@@ -768,14 +788,14 @@ func (w *LightWindow) drawBorderHorizontal(top, bottom bool) {
 	if w.preview {
 		color = ColPreviewBorder
 	}
-	hw := runewidth.RuneWidth(w.border.horizontal)
+	hw := runewidth.RuneWidth(w.border.top)
 	if top {
 		w.Move(0, 0)
-		w.CPrint(color, repeat(w.border.horizontal, w.width/hw))
+		w.CPrint(color, repeat(w.border.top, w.width/hw))
 	}
 	if bottom {
 		w.Move(w.height-1, 0)
-		w.CPrint(color, repeat(w.border.horizontal, w.width/hw))
+		w.CPrint(color, repeat(w.border.bottom, w.width/hw))
 	}
 }
 
@@ -791,11 +811,11 @@ func (w *LightWindow) drawBorderVertical(left, right bool) {
 	for y := 0; y < w.height; y++ {
 		w.Move(y, 0)
 		if left {
-			w.CPrint(color, string(w.border.vertical))
+			w.CPrint(color, string(w.border.left))
 		}
 		w.CPrint(color, repeat(' ', width))
 		if right {
-			w.CPrint(color, string(w.border.vertical))
+			w.CPrint(color, string(w.border.right))
 		}
 	}
 }
@@ -806,31 +826,31 @@ func (w *LightWindow) drawBorderAround(onlyHorizontal bool) {
 	if w.preview {
 		color = ColPreviewBorder
 	}
-	hw := runewidth.RuneWidth(w.border.horizontal)
+	hw := runewidth.RuneWidth(w.border.top)
 	tcw := runewidth.RuneWidth(w.border.topLeft) + runewidth.RuneWidth(w.border.topRight)
 	bcw := runewidth.RuneWidth(w.border.bottomLeft) + runewidth.RuneWidth(w.border.bottomRight)
 	rem := (w.width - tcw) % hw
-	w.CPrint(color, string(w.border.topLeft)+repeat(w.border.horizontal, (w.width-tcw)/hw)+repeat(' ', rem)+string(w.border.topRight))
+	w.CPrint(color, string(w.border.topLeft)+repeat(w.border.top, (w.width-tcw)/hw)+repeat(' ', rem)+string(w.border.topRight))
 	if !onlyHorizontal {
-		vw := runewidth.RuneWidth(w.border.vertical)
+		vw := runewidth.RuneWidth(w.border.left)
 		for y := 1; y < w.height-1; y++ {
 			w.Move(y, 0)
-			w.CPrint(color, string(w.border.vertical))
+			w.CPrint(color, string(w.border.left))
 			w.CPrint(color, repeat(' ', w.width-vw*2))
-			w.CPrint(color, string(w.border.vertical))
+			w.CPrint(color, string(w.border.right))
 		}
 	}
 	w.Move(w.height-1, 0)
 	rem = (w.width - bcw) % hw
-	w.CPrint(color, string(w.border.bottomLeft)+repeat(w.border.horizontal, (w.width-bcw)/hw)+repeat(' ', rem)+string(w.border.bottomRight))
+	w.CPrint(color, string(w.border.bottomLeft)+repeat(w.border.bottom, (w.width-bcw)/hw)+repeat(' ', rem)+string(w.border.bottomRight))
 }
 
-func (w *LightWindow) csi(code string) {
+func (w *LightWindow) csi(code string) string {
-	w.renderer.csi(code)
+	return w.renderer.csi(code)
 }
 
-func (w *LightWindow) stderrInternal(str string, allowNLCR bool) {
+func (w *LightWindow) stderrInternal(str string, allowNLCR bool, resetCode string) {
-	w.renderer.stderrInternal(str, allowNLCR)
+	w.renderer.stderrInternal(str, allowNLCR, resetCode)
 }
 
 func (w *LightWindow) Top() int {
@@ -936,10 +956,10 @@ func colorCodes(fg Color, bg Color) []string {
 	return codes
 }
 
-func (w *LightWindow) csiColor(fg Color, bg Color, attr Attr) bool {
+func (w *LightWindow) csiColor(fg Color, bg Color, attr Attr) (bool, string) {
 	codes := append(attrCodes(attr), colorCodes(fg, bg)...)
-	w.csi(";" + strings.Join(codes, ";") + "m")
+	code := w.csi(";" + strings.Join(codes, ";") + "m")
-	return len(codes) > 0
+	return len(codes) > 0, code
 }
 
 func (w *LightWindow) Print(text string) {
@@ -951,16 +971,17 @@ func cleanse(str string) string {
 }
 
 func (w *LightWindow) CPrint(pair ColorPair, text string) {
-	w.csiColor(pair.Fg(), pair.Bg(), pair.Attr())
+	_, code := w.csiColor(pair.Fg(), pair.Bg(), pair.Attr())
-	w.stderrInternal(cleanse(text), false)
+	w.stderrInternal(cleanse(text), false, code)
 	w.csi("m")
 }
 
 func (w *LightWindow) cprint2(fg Color, bg Color, attr Attr, text string) {
-	if w.csiColor(fg, bg, attr) {
+	hasColors, code := w.csiColor(fg, bg, attr)
+	if hasColors {
 		defer w.csi("m")
 	}
-	w.stderrInternal(cleanse(text), false)
+	w.stderrInternal(cleanse(text), false, code)
 }
 
 type wrappedLine struct {
@@ -980,6 +1001,8 @@ func wrapLine(input string, prefixLength int, max int, tabstop int) []wrappedLin
 		if len(rs) == 1 && rs[0] == '\t' {
 			w = tabstop - (prefixLength+width)%tabstop
 			str = repeat(' ', w)
+		} else if rs[0] == '\r' {
+			w++
 		} else {
 			w = runewidth.StringWidth(str)
 		}
@@ -998,12 +1021,12 @@ func wrapLine(input string, prefixLength int, max int, tabstop int) []wrappedLin
 	return lines
 }
 
-func (w *LightWindow) fill(str string, onMove func()) FillReturn {
+func (w *LightWindow) fill(str string, resetCode string) 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 {
-			w.stderrInternal(wl.text, false)
+			w.stderrInternal(wl.text, false, resetCode)
 			w.posx += wl.displayWidth
 
 			// Wrap line
@@ -1013,7 +1036,7 @@ func (w *LightWindow) fill(str string, onMove func()) FillReturn {
 				}
 				w.MoveAndClear(w.posy, w.posx)
 				w.Move(w.posy+1, 0)
-				onMove()
+				w.renderer.stderr(resetCode)
 			}
 		}
 	}
@@ -1022,22 +1045,26 @@ func (w *LightWindow) fill(str string, onMove func()) FillReturn {
 			return FillSuspend
 		}
 		w.Move(w.posy+1, 0)
-		onMove()
+		w.renderer.stderr(resetCode)
 		return FillNextLine
 	}
 	return FillContinue
 }
 
-func (w *LightWindow) setBg() {
+func (w *LightWindow) setBg() string {
 	if w.bg != colDefault {
-		w.csiColor(colDefault, w.bg, AttrRegular)
+		_, code := w.csiColor(colDefault, w.bg, AttrRegular)
+		return code
 	}
+	// Should clear dim attribute after ␍ in the preview window
+	// e.g. printf "foo\rbar" | fzf --ansi --preview 'printf "foo\rbar"'
+	return "\x1b[m"
 }
 
 func (w *LightWindow) Fill(text string) FillReturn {
 	w.Move(w.posy, w.posx)
-	w.setBg()
+	code := w.setBg()
-	return w.fill(text, w.setBg)
+	return w.fill(text, code)
 }
 
 func (w *LightWindow) CFill(fg Color, bg Color, attr Attr, text string) FillReturn {
@@ -1048,11 +1075,11 @@ func (w *LightWindow) CFill(fg Color, bg Color, attr Attr, text string) FillRetu
 	if bg == colDefault {
 		bg = w.bg
 	}
-	if w.csiColor(fg, bg, attr) {
+	if hasColors, resetCode := w.csiColor(fg, bg, attr); hasColors {
 		defer w.csi("m")
-		return w.fill(text, func() { w.csiColor(fg, bg, attr) })
+		return w.fill(text, resetCode)
 	}
-	return w.fill(text, w.setBg)
+	return w.fill(text, w.setBg())
 }
 
 func (w *LightWindow) FinishFill() {

src/tui/tcell.go

@@ -8,6 +8,7 @@ import (
 
 	"github.com/gdamore/tcell/v2"
 	"github.com/gdamore/tcell/v2/encoding"
+	"github.com/junegunn/fzf/src/util"
 
 	"github.com/mattn/go-runewidth"
 	"github.com/rivo/uniseg"
@@ -412,6 +413,12 @@ func (r *FullscreenRenderer) GetChar() Event {
 		case tcell.KeyHome:
 			return Event{Home, 0, nil}
 		case tcell.KeyDelete:
+			if ctrl {
+				return Event{CtrlDelete, 0, nil}
+			}
+			if shift {
+				return Event{SDelete, 0, nil}
+			}
 			return Event{Del, 0, nil}
 		case tcell.KeyEnd:
 			return Event{End, 0, nil}
@@ -572,26 +579,27 @@ func (w *TcellWindow) printString(text string, pair ColorPair) {
 
 	gr := uniseg.NewGraphemes(text)
 	for gr.Next() {
+		st := style
 		rs := gr.Runes()
 
 		if len(rs) == 1 {
 			r := rs[0]
-			if r < rune(' ') { // ignore control characters
+			if r == '\r' {
-				continue
+				st = style.Dim(true)
+				rs[0] = '␍'
 			} else if r == '\n' {
-				w.lastY++
+				st = style.Dim(true)
-				lx = 0
+				rs[0] = '␊'
-				continue
+			} else if r < rune(' ') { // ignore control characters
-			} 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, rs[0], rs[1:], style)
+			_screen.SetContent(xPos, yPos, rs[0], rs[1:], st)
 		}
-		lx += runewidth.StringWidth(string(rs))
+		lx += util.StringWidth(string(rs))
 	}
 	w.lastX += lx
 }
@@ -620,13 +628,22 @@ func (w *TcellWindow) fillString(text string, pair ColorPair) FillReturn {
 		Italic(a&Attr(tcell.AttrItalic) != 0)
 
 	gr := uniseg.NewGraphemes(text)
+Loop:
 	for gr.Next() {
+		st := style
 		rs := gr.Runes()
-		if len(rs) == 1 && rs[0] == '\n' {
+		if len(rs) == 1 {
-			w.lastY++
+			r := rs[0]
-			w.lastX = 0
+			switch r {
-			lx = 0
+			case '\r':
-			continue
+				st = style.Dim(true)
+				rs[0] = '␍'
+			case '\n':
+				w.lastY++
+				w.lastX = 0
+				lx = 0
+				continue Loop
+			}
 		}
 
 		// word wrap:
@@ -643,8 +660,8 @@ func (w *TcellWindow) fillString(text string, pair ColorPair) FillReturn {
 			return FillSuspend
 		}
 
-		_screen.SetContent(xPos, yPos, rs[0], rs[1:], style)
+		_screen.SetContent(xPos, yPos, rs[0], rs[1:], st)
-		lx += runewidth.StringWidth(string(rs))
+		lx += util.StringWidth(string(rs))
 	}
 	w.lastX += lx
 	if w.lastX == w.width {
@@ -696,9 +713,9 @@ func (w *TcellWindow) drawBorder(onlyHorizontal bool) {
 		style = w.normal.style()
 	}
 
-	hw := runewidth.RuneWidth(w.borderStyle.horizontal)
+	hw := runewidth.RuneWidth(w.borderStyle.top)
 	switch shape {
-	case BorderRounded, BorderSharp, BorderBold, BorderDouble, BorderHorizontal, BorderTop:
+	case BorderRounded, BorderSharp, BorderBold, BorderBlock, BorderDouble, BorderHorizontal, BorderTop:
 		max := right - 2*hw
 		if shape == BorderHorizontal || shape == BorderTop {
 			max = right - hw
@@ -709,36 +726,36 @@ func (w *TcellWindow) drawBorder(onlyHorizontal bool) {
 		//       ==================
 		//                 (  HH  ) => TR is ignored
 		for x := left; x <= max; x += hw {
-			_screen.SetContent(x, top, w.borderStyle.horizontal, nil, style)
+			_screen.SetContent(x, top, w.borderStyle.top, nil, style)
 		}
 	}
 	switch shape {
-	case BorderRounded, BorderSharp, BorderBold, BorderDouble, BorderHorizontal, BorderBottom:
+	case BorderRounded, BorderSharp, BorderBold, BorderBlock, BorderDouble, BorderHorizontal, BorderBottom:
 		max := right - 2*hw
 		if shape == BorderHorizontal || shape == BorderBottom {
 			max = right - hw
 		}
 		for x := left; x <= max; x += hw {
-			_screen.SetContent(x, bot-1, w.borderStyle.horizontal, nil, style)
+			_screen.SetContent(x, bot-1, w.borderStyle.bottom, nil, style)
 		}
 	}
 	if !onlyHorizontal {
 		switch shape {
-		case BorderRounded, BorderSharp, BorderBold, BorderDouble, BorderVertical, BorderLeft:
+		case BorderRounded, BorderSharp, BorderBold, BorderBlock, BorderDouble, BorderVertical, BorderLeft:
 			for y := top; y < bot; y++ {
-				_screen.SetContent(left, y, w.borderStyle.vertical, nil, style)
+				_screen.SetContent(left, y, w.borderStyle.left, nil, style)
 			}
 		}
 		switch shape {
-		case BorderRounded, BorderSharp, BorderBold, BorderDouble, BorderVertical, BorderRight:
+		case BorderRounded, BorderSharp, BorderBold, BorderBlock, BorderDouble, BorderVertical, BorderRight:
-			vw := runewidth.RuneWidth(w.borderStyle.vertical)
+			vw := runewidth.RuneWidth(w.borderStyle.right)
 			for y := top; y < bot; y++ {
-				_screen.SetContent(right-vw, y, w.borderStyle.vertical, nil, style)
+				_screen.SetContent(right-vw, y, w.borderStyle.right, nil, style)
 			}
 		}
 	}
 	switch shape {
-	case BorderRounded, BorderSharp, BorderBold, BorderDouble:
+	case BorderRounded, BorderSharp, BorderBold, BorderBlock, BorderDouble:
 		_screen.SetContent(left, top, w.borderStyle.topLeft, nil, style)
 		_screen.SetContent(right-runewidth.RuneWidth(w.borderStyle.topRight), top, w.borderStyle.topRight, nil, style)
 		_screen.SetContent(left, bot-1, w.borderStyle.bottomLeft, nil, style)

src/tui/tui.go

@@ -41,6 +41,7 @@ const (
 	CtrlZ
 	ESC
 	CtrlSpace
+	CtrlDelete
 
 	// https://apple.stackexchange.com/questions/24261/how-do-i-send-c-that-is-control-slash-to-the-terminal
 	CtrlBackSlash
@@ -74,6 +75,7 @@ const (
 	SDown
 	SLeft
 	SRight
+	SDelete
 
 	F1
 	F2
@@ -93,6 +95,8 @@ const (
 	Start
 	Load
 	Focus
+	One
+	Zero
 
 	AltBS
 
@@ -251,29 +255,31 @@ func (p ColorPair) MergeNonDefault(other ColorPair) ColorPair {
 }
 
 type ColorTheme struct {
-	Colored      bool
+	Colored          bool
-	Input        ColorAttr
+	Input            ColorAttr
-	Disabled     ColorAttr
+	Disabled         ColorAttr
-	Fg           ColorAttr
+	Fg               ColorAttr
-	Bg           ColorAttr
+	Bg               ColorAttr
-	PreviewFg    ColorAttr
+	PreviewFg        ColorAttr
-	PreviewBg    ColorAttr
+	PreviewBg        ColorAttr
-	DarkBg       ColorAttr
+	DarkBg           ColorAttr
-	Gutter       ColorAttr
+	Gutter           ColorAttr
-	Prompt       ColorAttr
+	Prompt           ColorAttr
-	Match        ColorAttr
+	Match            ColorAttr
-	Current      ColorAttr
+	Current          ColorAttr
-	CurrentMatch ColorAttr
+	CurrentMatch     ColorAttr
-	Spinner      ColorAttr
+	Spinner          ColorAttr
-	Info         ColorAttr
+	Info             ColorAttr
-	Cursor       ColorAttr
+	Cursor           ColorAttr
-	Selected     ColorAttr
+	Selected         ColorAttr
-	Header       ColorAttr
+	Header           ColorAttr
-	Separator    ColorAttr
+	Separator        ColorAttr
-	Scrollbar    ColorAttr
+	Scrollbar        ColorAttr
-	Border       ColorAttr
+	Border           ColorAttr
-	BorderLabel  ColorAttr
+	PreviewBorder    ColorAttr
-	PreviewLabel ColorAttr
+	PreviewScrollbar ColorAttr
+	BorderLabel      ColorAttr
+	PreviewLabel     ColorAttr
 }
 
 type Event struct {
@@ -282,6 +288,15 @@ type Event struct {
 	MouseEvent *MouseEvent
 }
 
+func (e Event) Is(types ...EventType) bool {
+	for _, t := range types {
+		if e.Type == t {
+			return true
+		}
+	}
+	return false
+}
+
 type MouseEvent struct {
 	Y      int
 	X      int
@@ -299,6 +314,7 @@ const (
 	BorderRounded
 	BorderSharp
 	BorderBold
+	BorderBlock
 	BorderDouble
 	BorderHorizontal
 	BorderVertical
@@ -326,8 +342,10 @@ func (s BorderShape) HasTop() bool {
 
 type BorderStyle struct {
 	shape       BorderShape
-	horizontal  rune
+	top         rune
-	vertical    rune
+	bottom      rune
+	left        rune
+	right       rune
 	topLeft     rune
 	topRight    rune
 	bottomLeft  rune
@@ -340,8 +358,10 @@ func MakeBorderStyle(shape BorderShape, unicode bool) BorderStyle {
 	if !unicode {
 		return BorderStyle{
 			shape:       shape,
-			horizontal:  '-',
+			top:         '-',
-			vertical:    '|',
+			bottom:      '-',
+			left:        '|',
+			right:       '|',
 			topLeft:     '+',
 			topRight:    '+',
 			bottomLeft:  '+',
@@ -352,8 +372,10 @@ func MakeBorderStyle(shape BorderShape, unicode bool) BorderStyle {
 	case BorderSharp:
 		return BorderStyle{
 			shape:       shape,
-			horizontal:  '─',
+			top:         '─',
-			vertical:    '│',
+			bottom:      '─',
+			left:        '│',
+			right:       '│',
 			topLeft:     '┌',
 			topRight:    '┐',
 			bottomLeft:  '└',
@@ -362,18 +384,37 @@ func MakeBorderStyle(shape BorderShape, unicode bool) BorderStyle {
 	case BorderBold:
 		return BorderStyle{
 			shape:       shape,
-			horizontal:  '━',
+			top:         '━',
-			vertical:    '┃',
+			bottom:      '━',
+			left:        '┃',
+			right:       '┃',
 			topLeft:     '┏',
 			topRight:    '┓',
 			bottomLeft:  '┗',
 			bottomRight: '┛',
 		}
+	case BorderBlock:
+		// ▛▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▜
+		// ▌                  ▐
+		// ▙▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▟
+		return BorderStyle{
+			shape:       shape,
+			top:         '▀',
+			bottom:      '▄',
+			left:        '▌',
+			right:       '▐',
+			topLeft:     '▛',
+			topRight:    '▜',
+			bottomLeft:  '▙',
+			bottomRight: '▟',
+		}
 	case BorderDouble:
 		return BorderStyle{
 			shape:       shape,
-			horizontal:  '═',
+			top:         '═',
-			vertical:    '║',
+			bottom:      '═',
+			left:        '║',
+			right:       '║',
 			topLeft:     '╔',
 			topRight:    '╗',
 			bottomLeft:  '╚',
@@ -382,8 +423,10 @@ func MakeBorderStyle(shape BorderShape, unicode bool) BorderStyle {
 	}
 	return BorderStyle{
 		shape:       shape,
-		horizontal:  '─',
+		top:         '─',
-		vertical:    '│',
+		bottom:      '─',
+		left:        '│',
+		right:       '│',
 		topLeft:     '╭',
 		topRight:    '╮',
 		bottomLeft:  '╰',
@@ -394,8 +437,10 @@ func MakeBorderStyle(shape BorderShape, unicode bool) BorderStyle {
 func MakeTransparentBorder() BorderStyle {
 	return BorderStyle{
 		shape:       BorderRounded,
-		horizontal:  ' ',
+		top:         ' ',
-		vertical:    ' ',
+		bottom:      ' ',
+		left:        ' ',
+		right:       ' ',
 		topLeft:     ' ',
 		topRight:    ' ',
 		bottomLeft:  ' ',
@@ -492,61 +537,66 @@ var (
 	ColPreviewBorder        ColorPair
 	ColBorderLabel          ColorPair
 	ColPreviewLabel         ColorPair
+	ColPreviewScrollbar     ColorPair
 )
 
 func EmptyTheme() *ColorTheme {
 	return &ColorTheme{
-		Colored:      true,
+		Colored:          true,
-		Input:        ColorAttr{colUndefined, AttrUndefined},
+		Input:            ColorAttr{colUndefined, AttrUndefined},
-		Fg:           ColorAttr{colUndefined, AttrUndefined},
+		Fg:               ColorAttr{colUndefined, AttrUndefined},
-		Bg:           ColorAttr{colUndefined, AttrUndefined},
+		Bg:               ColorAttr{colUndefined, AttrUndefined},
-		DarkBg:       ColorAttr{colUndefined, AttrUndefined},
+		DarkBg:           ColorAttr{colUndefined, AttrUndefined},
-		Prompt:       ColorAttr{colUndefined, AttrUndefined},
+		Prompt:           ColorAttr{colUndefined, AttrUndefined},
-		Match:        ColorAttr{colUndefined, AttrUndefined},
+		Match:            ColorAttr{colUndefined, AttrUndefined},
-		Current:      ColorAttr{colUndefined, AttrUndefined},
+		Current:          ColorAttr{colUndefined, AttrUndefined},
-		CurrentMatch: ColorAttr{colUndefined, AttrUndefined},
+		CurrentMatch:     ColorAttr{colUndefined, AttrUndefined},
-		Spinner:      ColorAttr{colUndefined, AttrUndefined},
+		Spinner:          ColorAttr{colUndefined, AttrUndefined},
-		Info:         ColorAttr{colUndefined, AttrUndefined},
+		Info:             ColorAttr{colUndefined, AttrUndefined},
-		Cursor:       ColorAttr{colUndefined, AttrUndefined},
+		Cursor:           ColorAttr{colUndefined, AttrUndefined},
-		Selected:     ColorAttr{colUndefined, AttrUndefined},
+		Selected:         ColorAttr{colUndefined, AttrUndefined},
-		Header:       ColorAttr{colUndefined, AttrUndefined},
+		Header:           ColorAttr{colUndefined, AttrUndefined},
-		Border:       ColorAttr{colUndefined, AttrUndefined},
+		Border:           ColorAttr{colUndefined, AttrUndefined},
-		BorderLabel:  ColorAttr{colUndefined, AttrUndefined},
+		BorderLabel:      ColorAttr{colUndefined, AttrUndefined},
-		Disabled:     ColorAttr{colUndefined, AttrUndefined},
+		Disabled:         ColorAttr{colUndefined, AttrUndefined},
-		PreviewFg:    ColorAttr{colUndefined, AttrUndefined},
+		PreviewFg:        ColorAttr{colUndefined, AttrUndefined},
-		PreviewBg:    ColorAttr{colUndefined, AttrUndefined},
+		PreviewBg:        ColorAttr{colUndefined, AttrUndefined},
-		Gutter:       ColorAttr{colUndefined, AttrUndefined},
+		Gutter:           ColorAttr{colUndefined, AttrUndefined},
-		PreviewLabel: ColorAttr{colUndefined, AttrUndefined},
+		PreviewBorder:    ColorAttr{colUndefined, AttrUndefined},
-		Separator:    ColorAttr{colUndefined, AttrUndefined},
+		PreviewScrollbar: ColorAttr{colUndefined, AttrUndefined},
-		Scrollbar:    ColorAttr{colUndefined, AttrUndefined},
+		PreviewLabel:     ColorAttr{colUndefined, AttrUndefined},
+		Separator:        ColorAttr{colUndefined, AttrUndefined},
+		Scrollbar:        ColorAttr{colUndefined, AttrUndefined},
 	}
 }
 
 func NoColorTheme() *ColorTheme {
 	return &ColorTheme{
-		Colored:      false,
+		Colored:          false,
-		Input:        ColorAttr{colDefault, AttrRegular},
+		Input:            ColorAttr{colDefault, AttrUndefined},
-		Fg:           ColorAttr{colDefault, AttrRegular},
+		Fg:               ColorAttr{colDefault, AttrUndefined},
-		Bg:           ColorAttr{colDefault, AttrRegular},
+		Bg:               ColorAttr{colDefault, AttrUndefined},
-		DarkBg:       ColorAttr{colDefault, AttrRegular},
+		DarkBg:           ColorAttr{colDefault, AttrUndefined},
-		Prompt:       ColorAttr{colDefault, AttrRegular},
+		Prompt:           ColorAttr{colDefault, AttrUndefined},
-		Match:        ColorAttr{colDefault, Underline},
+		Match:            ColorAttr{colDefault, Underline},
-		Current:      ColorAttr{colDefault, Reverse},
+		Current:          ColorAttr{colDefault, Reverse},
-		CurrentMatch: ColorAttr{colDefault, Reverse | Underline},
+		CurrentMatch:     ColorAttr{colDefault, Reverse | Underline},
-		Spinner:      ColorAttr{colDefault, AttrRegular},
+		Spinner:          ColorAttr{colDefault, AttrUndefined},
-		Info:         ColorAttr{colDefault, AttrRegular},
+		Info:             ColorAttr{colDefault, AttrUndefined},
-		Cursor:       ColorAttr{colDefault, AttrRegular},
+		Cursor:           ColorAttr{colDefault, AttrUndefined},
-		Selected:     ColorAttr{colDefault, AttrRegular},
+		Selected:         ColorAttr{colDefault, AttrUndefined},
-		Header:       ColorAttr{colDefault, AttrRegular},
+		Header:           ColorAttr{colDefault, AttrUndefined},
-		Border:       ColorAttr{colDefault, AttrRegular},
+		Border:           ColorAttr{colDefault, AttrUndefined},
-		BorderLabel:  ColorAttr{colDefault, AttrRegular},
+		BorderLabel:      ColorAttr{colDefault, AttrUndefined},
-		Disabled:     ColorAttr{colDefault, AttrRegular},
+		Disabled:         ColorAttr{colDefault, AttrUndefined},
-		PreviewFg:    ColorAttr{colDefault, AttrRegular},
+		PreviewFg:        ColorAttr{colDefault, AttrUndefined},
-		PreviewBg:    ColorAttr{colDefault, AttrRegular},
+		PreviewBg:        ColorAttr{colDefault, AttrUndefined},
-		Gutter:       ColorAttr{colDefault, AttrRegular},
+		Gutter:           ColorAttr{colDefault, AttrUndefined},
-		PreviewLabel: ColorAttr{colDefault, AttrRegular},
+		PreviewBorder:    ColorAttr{colDefault, AttrUndefined},
-		Separator:    ColorAttr{colDefault, AttrRegular},
+		PreviewScrollbar: ColorAttr{colDefault, AttrUndefined},
-		Scrollbar:    ColorAttr{colDefault, AttrRegular},
+		PreviewLabel:     ColorAttr{colDefault, AttrUndefined},
+		Separator:        ColorAttr{colDefault, AttrUndefined},
+		Scrollbar:        ColorAttr{colDefault, AttrUndefined},
 	}
 }
 
@@ -557,79 +607,85 @@ func errorExit(message string) {
 
 func init() {
 	Default16 = &ColorTheme{
-		Colored:      true,
+		Colored:          true,
-		Input:        ColorAttr{colDefault, AttrUndefined},
+		Input:            ColorAttr{colDefault, AttrUndefined},
-		Fg:           ColorAttr{colDefault, AttrUndefined},
+		Fg:               ColorAttr{colDefault, AttrUndefined},
-		Bg:           ColorAttr{colDefault, AttrUndefined},
+		Bg:               ColorAttr{colDefault, AttrUndefined},
-		DarkBg:       ColorAttr{colBlack, AttrUndefined},
+		DarkBg:           ColorAttr{colBlack, AttrUndefined},
-		Prompt:       ColorAttr{colBlue, AttrUndefined},
+		Prompt:           ColorAttr{colBlue, AttrUndefined},
-		Match:        ColorAttr{colGreen, AttrUndefined},
+		Match:            ColorAttr{colGreen, AttrUndefined},
-		Current:      ColorAttr{colYellow, AttrUndefined},
+		Current:          ColorAttr{colYellow, AttrUndefined},
-		CurrentMatch: ColorAttr{colGreen, AttrUndefined},
+		CurrentMatch:     ColorAttr{colGreen, AttrUndefined},
-		Spinner:      ColorAttr{colGreen, AttrUndefined},
+		Spinner:          ColorAttr{colGreen, AttrUndefined},
-		Info:         ColorAttr{colWhite, AttrUndefined},
+		Info:             ColorAttr{colWhite, AttrUndefined},
-		Cursor:       ColorAttr{colRed, AttrUndefined},
+		Cursor:           ColorAttr{colRed, AttrUndefined},
-		Selected:     ColorAttr{colMagenta, AttrUndefined},
+		Selected:         ColorAttr{colMagenta, AttrUndefined},
-		Header:       ColorAttr{colCyan, AttrUndefined},
+		Header:           ColorAttr{colCyan, AttrUndefined},
-		Border:       ColorAttr{colBlack, AttrUndefined},
+		Border:           ColorAttr{colBlack, AttrUndefined},
-		BorderLabel:  ColorAttr{colWhite, AttrUndefined},
+		BorderLabel:      ColorAttr{colWhite, AttrUndefined},
-		Disabled:     ColorAttr{colUndefined, AttrUndefined},
+		Disabled:         ColorAttr{colUndefined, AttrUndefined},
-		PreviewFg:    ColorAttr{colUndefined, AttrUndefined},
+		PreviewFg:        ColorAttr{colUndefined, AttrUndefined},
-		PreviewBg:    ColorAttr{colUndefined, AttrUndefined},
+		PreviewBg:        ColorAttr{colUndefined, AttrUndefined},
-		Gutter:       ColorAttr{colUndefined, AttrUndefined},
+		Gutter:           ColorAttr{colUndefined, AttrUndefined},
-		PreviewLabel: ColorAttr{colUndefined, AttrUndefined},
+		PreviewBorder:    ColorAttr{colUndefined, AttrUndefined},
-		Separator:    ColorAttr{colUndefined, AttrUndefined},
+		PreviewScrollbar: ColorAttr{colUndefined, AttrUndefined},
-		Scrollbar:    ColorAttr{colUndefined, AttrUndefined},
+		PreviewLabel:     ColorAttr{colUndefined, AttrUndefined},
+		Separator:        ColorAttr{colUndefined, AttrUndefined},
+		Scrollbar:        ColorAttr{colUndefined, AttrUndefined},
 	}
 	Dark256 = &ColorTheme{
-		Colored:      true,
+		Colored:          true,
-		Input:        ColorAttr{colDefault, AttrUndefined},
+		Input:            ColorAttr{colDefault, AttrUndefined},
-		Fg:           ColorAttr{colDefault, AttrUndefined},
+		Fg:               ColorAttr{colDefault, AttrUndefined},
-		Bg:           ColorAttr{colDefault, AttrUndefined},
+		Bg:               ColorAttr{colDefault, AttrUndefined},
-		DarkBg:       ColorAttr{236, AttrUndefined},
+		DarkBg:           ColorAttr{236, AttrUndefined},
-		Prompt:       ColorAttr{110, AttrUndefined},
+		Prompt:           ColorAttr{110, AttrUndefined},
-		Match:        ColorAttr{108, AttrUndefined},
+		Match:            ColorAttr{108, AttrUndefined},
-		Current:      ColorAttr{254, AttrUndefined},
+		Current:          ColorAttr{254, AttrUndefined},
-		CurrentMatch: ColorAttr{151, AttrUndefined},
+		CurrentMatch:     ColorAttr{151, AttrUndefined},
-		Spinner:      ColorAttr{148, AttrUndefined},
+		Spinner:          ColorAttr{148, AttrUndefined},
-		Info:         ColorAttr{144, AttrUndefined},
+		Info:             ColorAttr{144, AttrUndefined},
-		Cursor:       ColorAttr{161, AttrUndefined},
+		Cursor:           ColorAttr{161, AttrUndefined},
-		Selected:     ColorAttr{168, AttrUndefined},
+		Selected:         ColorAttr{168, AttrUndefined},
-		Header:       ColorAttr{109, AttrUndefined},
+		Header:           ColorAttr{109, AttrUndefined},
-		Border:       ColorAttr{59, AttrUndefined},
+		Border:           ColorAttr{59, AttrUndefined},
-		BorderLabel:  ColorAttr{145, AttrUndefined},
+		BorderLabel:      ColorAttr{145, AttrUndefined},
-		Disabled:     ColorAttr{colUndefined, AttrUndefined},
+		Disabled:         ColorAttr{colUndefined, AttrUndefined},
-		PreviewFg:    ColorAttr{colUndefined, AttrUndefined},
+		PreviewFg:        ColorAttr{colUndefined, AttrUndefined},
-		PreviewBg:    ColorAttr{colUndefined, AttrUndefined},
+		PreviewBg:        ColorAttr{colUndefined, AttrUndefined},
-		Gutter:       ColorAttr{colUndefined, AttrUndefined},
+		Gutter:           ColorAttr{colUndefined, AttrUndefined},
-		PreviewLabel: ColorAttr{colUndefined, AttrUndefined},
+		PreviewBorder:    ColorAttr{colUndefined, AttrUndefined},
-		Separator:    ColorAttr{colUndefined, AttrUndefined},
+		PreviewScrollbar: ColorAttr{colUndefined, AttrUndefined},
-		Scrollbar:    ColorAttr{colUndefined, AttrUndefined},
+		PreviewLabel:     ColorAttr{colUndefined, AttrUndefined},
+		Separator:        ColorAttr{colUndefined, AttrUndefined},
+		Scrollbar:        ColorAttr{colUndefined, AttrUndefined},
 	}
 	Light256 = &ColorTheme{
-		Colored:      true,
+		Colored:          true,
-		Input:        ColorAttr{colDefault, AttrUndefined},
+		Input:            ColorAttr{colDefault, AttrUndefined},
-		Fg:           ColorAttr{colDefault, AttrUndefined},
+		Fg:               ColorAttr{colDefault, AttrUndefined},
-		Bg:           ColorAttr{colDefault, AttrUndefined},
+		Bg:               ColorAttr{colDefault, AttrUndefined},
-		DarkBg:       ColorAttr{251, AttrUndefined},
+		DarkBg:           ColorAttr{251, AttrUndefined},
-		Prompt:       ColorAttr{25, AttrUndefined},
+		Prompt:           ColorAttr{25, AttrUndefined},
-		Match:        ColorAttr{66, AttrUndefined},
+		Match:            ColorAttr{66, AttrUndefined},
-		Current:      ColorAttr{237, AttrUndefined},
+		Current:          ColorAttr{237, AttrUndefined},
-		CurrentMatch: ColorAttr{23, AttrUndefined},
+		CurrentMatch:     ColorAttr{23, AttrUndefined},
-		Spinner:      ColorAttr{65, AttrUndefined},
+		Spinner:          ColorAttr{65, AttrUndefined},
-		Info:         ColorAttr{101, AttrUndefined},
+		Info:             ColorAttr{101, AttrUndefined},
-		Cursor:       ColorAttr{161, AttrUndefined},
+		Cursor:           ColorAttr{161, AttrUndefined},
-		Selected:     ColorAttr{168, AttrUndefined},
+		Selected:         ColorAttr{168, AttrUndefined},
-		Header:       ColorAttr{31, AttrUndefined},
+		Header:           ColorAttr{31, AttrUndefined},
-		Border:       ColorAttr{145, AttrUndefined},
+		Border:           ColorAttr{145, AttrUndefined},
-		BorderLabel:  ColorAttr{59, AttrUndefined},
+		BorderLabel:      ColorAttr{59, AttrUndefined},
-		Disabled:     ColorAttr{colUndefined, AttrUndefined},
+		Disabled:         ColorAttr{colUndefined, AttrUndefined},
-		PreviewFg:    ColorAttr{colUndefined, AttrUndefined},
+		PreviewFg:        ColorAttr{colUndefined, AttrUndefined},
-		PreviewBg:    ColorAttr{colUndefined, AttrUndefined},
+		PreviewBg:        ColorAttr{colUndefined, AttrUndefined},
-		Gutter:       ColorAttr{colUndefined, AttrUndefined},
+		Gutter:           ColorAttr{colUndefined, AttrUndefined},
-		PreviewLabel: ColorAttr{colUndefined, AttrUndefined},
+		PreviewBorder:    ColorAttr{colUndefined, AttrUndefined},
-		Separator:    ColorAttr{colUndefined, AttrUndefined},
+		PreviewScrollbar: ColorAttr{colUndefined, AttrUndefined},
-		Scrollbar:    ColorAttr{colUndefined, AttrUndefined},
+		PreviewLabel:     ColorAttr{colUndefined, AttrUndefined},
+		Separator:        ColorAttr{colUndefined, AttrUndefined},
+		Scrollbar:        ColorAttr{colUndefined, AttrUndefined},
 	}
 }
 
@@ -670,8 +726,10 @@ func initTheme(theme *ColorTheme, baseTheme *ColorTheme, forceBlack bool) {
 	theme.PreviewFg = o(theme.Fg, theme.PreviewFg)
 	theme.PreviewBg = o(theme.Bg, theme.PreviewBg)
 	theme.PreviewLabel = o(theme.BorderLabel, theme.PreviewLabel)
+	theme.PreviewBorder = o(theme.Border, theme.PreviewBorder)
 	theme.Separator = o(theme.Border, theme.Separator)
 	theme.Scrollbar = o(theme.Border, theme.Scrollbar)
+	theme.PreviewScrollbar = o(theme.PreviewBorder, theme.PreviewScrollbar)
 
 	initPalette(theme)
 }
@@ -709,5 +767,6 @@ func initPalette(theme *ColorTheme) {
 	ColBorderLabel = pair(theme.BorderLabel, theme.Bg)
 	ColPreviewLabel = pair(theme.PreviewLabel, theme.PreviewBg)
 	ColPreview = pair(theme.PreviewFg, theme.PreviewBg)
-	ColPreviewBorder = pair(theme.Border, theme.PreviewBg)
+	ColPreviewBorder = pair(theme.PreviewBorder, theme.PreviewBg)
+	ColPreviewScrollbar = pair(theme.PreviewScrollbar, theme.PreviewBg)
 }

src/util/util.go

@@ -11,6 +11,11 @@ import (
 	"github.com/rivo/uniseg"
 )
 
+// StringWidth returns string width where each CR/LF character takes 1 column
+func StringWidth(s string) int {
+	return runewidth.StringWidth(s) + strings.Count(s, "\n") + strings.Count(s, "\r")
+}
+
 // RunesWidth returns runes width
 func RunesWidth(runes []rune, prefixWidth int, tabstop int, limit int) (int, int) {
 	width := 0
@@ -22,8 +27,7 @@ func RunesWidth(runes []rune, prefixWidth int, tabstop int, limit int) (int, int
 		if len(rs) == 1 && rs[0] == '\t' {
 			w = tabstop - (prefixWidth+width)%tabstop
 		} else {
-			s := string(rs)
+			w = StringWidth(string(rs))
-			w = runewidth.StringWidth(s) + strings.Count(s, "\n")
 		}
 		width += w
 		if width > limit {
@@ -41,7 +45,7 @@ func Truncate(input string, limit int) ([]rune, int) {
 	gr := uniseg.NewGraphemes(input)
 	for gr.Next() {
 		rs := gr.Runes()
-		w := runewidth.StringWidth(string(rs))
+		w := StringWidth(string(rs))
 		if width+w > limit {
 			return runes, width
 		}

src/util/util_test.go

@@ -70,7 +70,7 @@ func TestMin32(t *testing.T) {
 	}
 }
 
-func TestContrain(t *testing.T) {
+func TestConstrain(t *testing.T) {
 	if Constrain(-3, -1, 3) != -1 {
 		t.Error("Expected", -1)
 	}
@@ -83,7 +83,7 @@ func TestContrain(t *testing.T) {
 	}
 }
 
-func TestContrain32(t *testing.T) {
+func TestConstrain32(t *testing.T) {
 	if Constrain32(-3, -1, 3) != -1 {
 		t.Error("Expected", -1)
 	}

test/test_go.rb

@@ -1865,6 +1865,67 @@ class TestGoFZF < TestBase
     tmux.until { |lines| assert_equal '>', lines.last }
   end
 
+  def test_change_and_transform_header
+    [
+      'space:change-header:$(seq 4)',
+      'space:transform-header:seq 4'
+    ].each_with_index do |binding, i|
+      tmux.send_keys %(seq 3 | #{FZF} --header-lines 2 --header bar --bind "#{binding}"), :Enter
+      expected = <<~OUTPUT
+        > 3
+          2
+          1
+          bar
+          1/1
+        >
+      OUTPUT
+      tmux.until { assert_block(expected, _1) }
+      tmux.send_keys :Space
+      expected = <<~OUTPUT
+        > 3
+          2
+          1
+          1
+          2
+          3
+          4
+          1/1
+        >
+      OUTPUT
+      tmux.until { assert_block(expected, _1) }
+      next unless i.zero?
+
+      teardown
+      setup
+    end
+  end
+
+  def test_change_header
+    tmux.send_keys %(seq 3 | #{FZF} --header-lines 2 --header bar --bind "space:change-header:$(seq 4)"), :Enter
+    expected = <<~OUTPUT
+      > 3
+        2
+        1
+        bar
+        1/1
+      >
+    OUTPUT
+    tmux.until { assert_block(expected, _1) }
+    tmux.send_keys :Space
+    expected = <<~OUTPUT
+      > 3
+        2
+        1
+        1
+        2
+        3
+        4
+        1/1
+      >
+    OUTPUT
+    tmux.until { assert_block(expected, _1) }
+  end
+
   def test_change_query
     tmux.send_keys %(: | #{FZF} --query foo --bind space:change-query:foobar), :Enter
     tmux.until { |lines| assert_equal 0, lines.item_count }
@@ -1930,7 +1991,7 @@ class TestGoFZF < TestBase
 
   def test_keep_right
     tmux.send_keys "seq 10000 | #{FZF} --read0 --keep-right", :Enter
-    tmux.until { |lines| assert lines.any_include?('9999 10000') }
+    tmux.until { |lines| assert lines.any_include?('9999␊10000') }
   end
 
   def test_backward_eof
@@ -2432,6 +2493,39 @@ class TestGoFZF < TestBase
     end
   end
 
+  def test_change_preview_window_rotate_hidden
+    tmux.send_keys "seq 100 | #{FZF} --preview-window hidden --preview 'echo =={}==' --bind '" \
+      "a:change-preview-window(nohidden||down,1|)'", :Enter
+    tmux.until { |lines| assert_equal 100, lines.match_count }
+    tmux.until { |lines| refute_includes lines[1], '==1==' }
+    tmux.send_keys 'a'
+    tmux.until { |lines| assert_includes lines[1], '==1==' }
+    tmux.send_keys 'a'
+    tmux.until { |lines| refute_includes lines[1], '==1==' }
+    tmux.send_keys 'a'
+    tmux.until { |lines| assert_includes lines[-2], '==1==' }
+    tmux.send_keys 'a'
+    tmux.until { |lines| refute_includes lines[-2], '==1==' }
+    tmux.send_keys 'a'
+    tmux.until { |lines| assert_includes lines[1], '==1==' }
+  end
+
+  def test_change_preview_window_rotate_hidden_down
+    tmux.send_keys "seq 100 | #{FZF} --bind '?:change-preview-window:up||down|' --preview 'echo =={}==' --preview-window hidden,down,1", :Enter
+    tmux.until { |lines| assert_equal 100, lines.match_count }
+    tmux.until { |lines| refute_includes lines[1], '==1==' }
+    tmux.send_keys '?'
+    tmux.until { |lines| assert_includes lines[1], '==1==' }
+    tmux.send_keys '?'
+    tmux.until { |lines| refute_includes lines[1], '==1==' }
+    tmux.send_keys '?'
+    tmux.until { |lines| assert_includes lines[-2], '==1==' }
+    tmux.send_keys '?'
+    tmux.until { |lines| refute_includes lines[-2], '==1==' }
+    tmux.send_keys '?'
+    tmux.until { |lines| assert_includes lines[1], '==1==' }
+  end
+
   def test_ellipsis
     tmux.send_keys 'seq 1000 | tr "\n" , | fzf --ellipsis=SNIPSNIP -e -q500', :Enter
     tmux.until { |lines| assert_equal 1, lines.match_count }
@@ -2534,12 +2628,16 @@ class TestGoFZF < TestBase
   end
 
   def test_focus_event
-    tmux.send_keys 'seq 100 | fzf --bind "focus:transform-prompt(echo [[{}]])"', :Enter
+    tmux.send_keys 'seq 100 | fzf --bind "focus:transform-prompt(echo [[{}]]),?:unbind(focus)"', :Enter
     tmux.until { |lines| assert_includes(lines[-1], '[[1]]') }
     tmux.send_keys :Up
     tmux.until { |lines| assert_includes(lines[-1], '[[2]]') }
     tmux.send_keys :X
     tmux.until { |lines| assert_includes(lines[-1], '[[]]') }
+    tmux.send_keys '?'
+    tmux.send_keys :BSpace
+    tmux.until { |lines| assert_equal 100, lines.match_count }
+    tmux.until { |lines| refute_includes(lines[-1], '[[1]]') }
   end
 
   def test_labels_center
@@ -2629,11 +2727,17 @@ class TestGoFZF < TestBase
   end
 
   def test_listen
-    tmux.send_keys 'seq 10 | fzf --listen 6266', :Enter
+    { '--listen 6266' => -> { URI('http://localhost:6266') },
-    tmux.until { |lines| assert_equal 10, lines.item_count }
+      "--listen --sync --bind 'start:execute-silent:echo $FZF_PORT > /tmp/fzf-port'" =>
-    Net::HTTP.post(URI('http://localhost:6266'), 'change-query(yo)+reload(seq 100)+change-prompt:hundred> ')
+        -> { URI("http://localhost:#{File.read('/tmp/fzf-port').chomp}") } }.each do |opts, fn|
-    tmux.until { |lines| assert_equal 100, lines.item_count }
+      tmux.send_keys "seq 10 | fzf #{opts}", :Enter
-    tmux.until { |lines| assert_equal 'hundred> yo', lines[-1] }
+      tmux.until { |lines| assert_equal 10, lines.item_count }
+      Net::HTTP.post(fn.call, 'change-query(yo)+reload(seq 100)+change-prompt:hundred> ')
+      tmux.until { |lines| assert_equal 100, lines.item_count }
+      tmux.until { |lines| assert_equal 'hundred> yo', lines[-1] }
+      teardown
+      setup
+    end
   end
 
   def test_toggle_alternative_preview_window
@@ -2656,6 +2760,181 @@ class TestGoFZF < TestBase
     tmux.send_keys :Enter
     tmux.until { |lines| assert_equal 99, lines.item_count }
   end
+
+  def test_no_extra_newline_issue_3209
+    tmux.send_keys(%(seq 100 | #{FZF} --height 10 --preview-window up,wrap --preview 'printf "─%.0s" $(seq 1 "$((FZF_PREVIEW_COLUMNS - 5))"); printf $"\\e[7m%s\\e[0m" title; echo; echo something'), :Enter)
+    expected = <<~OUTPUT
+      ╭──────────
+      │ ─────────
+      │ something
+      │
+      ╰──────────
+        3
+        2
+      > 1
+        100/100 ─
+      >
+    OUTPUT
+    tmux.until { assert_block(expected, _1) }
+  end
+
+  def test_track
+    tmux.send_keys "seq 1000 | #{FZF} --query 555 --track --bind t:toggle-track", :Enter
+    tmux.until do |lines|
+      assert_equal 1, lines.match_count
+      assert_includes lines, '> 555'
+    end
+    tmux.send_keys :BSpace
+    index = tmux.until do |lines|
+      assert_equal 28, lines.match_count
+      assert_includes lines, '> 555'
+    end.index('> 555')
+    tmux.send_keys :BSpace
+    tmux.until do |lines|
+      assert_equal 271, lines.match_count
+      assert_equal '> 555', lines[index]
+    end
+    tmux.send_keys :BSpace
+    tmux.until do |lines|
+      assert_equal 1000, lines.match_count
+      assert_equal '> 555', lines[index]
+    end
+    tmux.send_keys '555'
+    tmux.until do |lines|
+      assert_equal 1, lines.match_count
+      assert_includes lines, '> 555'
+      assert_includes lines[-2], '+T'
+    end
+    tmux.send_keys 't'
+    tmux.until do |lines|
+      refute_includes lines[-2], '+T'
+    end
+    tmux.send_keys :BSpace
+    tmux.until do |lines|
+      assert_equal 28, lines.match_count
+      assert_includes lines, '> 55'
+    end
+    tmux.send_keys :BSpace
+    tmux.until do |lines|
+      assert_equal 271, lines.match_count
+      assert_includes lines, '> 5'
+    end
+    tmux.send_keys 't'
+    tmux.until do |lines|
+      assert_includes lines[-2], '+T'
+    end
+    tmux.send_keys :BSpace
+    tmux.until do |lines|
+      assert_equal 1000, lines.match_count
+      assert_includes lines, '> 5'
+    end
+  end
+
+  def test_track_action
+    tmux.send_keys "seq 1000 | #{FZF} --query 555 --bind t:track", :Enter
+    tmux.until do |lines|
+      assert_equal 1, lines.match_count
+      assert_includes lines, '> 555'
+    end
+    tmux.send_keys :BSpace
+    tmux.until do |lines|
+      assert_equal 28, lines.match_count
+      assert_includes lines, '> 55'
+    end
+    tmux.send_keys :t
+    tmux.until do |lines|
+      assert_includes lines[-2], '+T'
+    end
+    tmux.send_keys :BSpace
+    tmux.until do |lines|
+      assert_equal 271, lines.match_count
+      assert_includes lines, '> 55'
+    end
+
+    # Automatically disabled when the tracking item is no longer visible
+    tmux.send_keys '4'
+    tmux.until do |lines|
+      assert_equal 28, lines.match_count
+      refute_includes lines[-2], '+T'
+    end
+    tmux.send_keys :BSpace
+    tmux.until do |lines|
+      assert_equal 271, lines.match_count
+      assert_includes lines, '> 5'
+    end
+    tmux.send_keys :t
+    tmux.until do |lines|
+      assert_includes lines[-2], '+T'
+    end
+    tmux.send_keys :Up
+    tmux.until do |lines|
+      refute_includes lines[-2], '+T'
+    end
+  end
+
+  def test_one_and_zero
+    tmux.send_keys "seq 10 | #{FZF} --bind 'zero:preview(echo no match),one:preview(echo {} is the only match)'", :Enter
+    tmux.send_keys '1'
+    tmux.until do |lines|
+      assert_equal 2, lines.match_count
+      refute(lines.any? { _1.include?('only match') })
+      refute(lines.any? { _1.include?('no match') })
+    end
+    tmux.send_keys '0'
+    tmux.until do |lines|
+      assert_equal 1, lines.match_count
+      assert(lines.any? { _1.include?('only match') })
+    end
+    tmux.send_keys '0'
+    tmux.until do |lines|
+      assert_equal 0, lines.match_count
+      assert(lines.any? { _1.include?('no match') })
+    end
+  end
+
+  def test_height_range_with_exit_0
+    tmux.send_keys "seq 10 | #{FZF} --height ~10% --exit-0", :Enter
+    tmux.until { |lines| assert_equal 10, lines.item_count }
+    tmux.send_keys :c
+    tmux.until { |lines| assert_equal 0, lines.match_count }
+  end
+
+  def test_reload_and_change
+    tmux.send_keys "(echo foo; echo bar) | #{FZF} --bind 'load:reload-sync(sleep 60)+change-query(bar)'", :Enter
+    tmux.until { |lines| assert_equal 1, lines.match_count }
+  end
+
+  def test_reload_and_change_cache
+    tmux.send_keys "echo bar | #{FZF} --bind 'zero:change-header(foo)+reload(echo foo)+clear-query'", :Enter
+    expected = <<~OUTPUT
+      > bar
+        1/1
+      >
+    OUTPUT
+    tmux.until { assert_block(expected, _1) }
+    tmux.send_keys :z
+    expected = <<~OUTPUT
+      > foo
+        foo
+        1/1
+      >
+    OUTPUT
+    tmux.until { assert_block(expected, _1) }
+  end
+
+  def test_delete_with_modifiers
+    tmux.send_keys "seq 100 | #{FZF} --bind 'ctrl-delete:up+up,shift-delete:down,focus:transform-prompt:echo [{}]'", :Enter
+    tmux.until { |lines| assert_equal 100, lines.item_count }
+    tmux.send_keys 'C-Delete'
+    tmux.until { |lines| assert_equal '[3]', lines[-1] }
+    tmux.send_keys 'S-Delete'
+    tmux.until { |lines| assert_equal '[2]', lines[-1] }
+  end
+
+  def test_become_tty
+    tmux.send_keys "sleep 0.5 | #{FZF} --bind 'start:reload:ls' --bind 'load:become:tty'", :Enter
+    tmux.until { |lines| assert_includes lines, '/dev/tty' }
+  end
 end
 
 module TestShell
@@ -2784,9 +3063,9 @@ module TestShell
     tmux.send_keys 'C-r'
     tmux.until { |lines| assert_equal '>', lines[-1] }
     tmux.send_keys 'foo bar'
-    tmux.until { |lines| assert lines[-3]&.end_with?('bar"') }
+    tmux.until { |lines| assert lines[-3]&.match?(/bar"␊?/) }
     tmux.send_keys :Enter
-    tmux.until { |lines| assert lines[-1]&.end_with?('bar"') }
+    tmux.until { |lines| assert lines[-1]&.match?(/bar"␊?/) }
     tmux.send_keys :Enter
     tmux.until { |lines| assert_equal %w[foo bar], lines[-2..] }
   end

typos.toml

@@ -0,0 +1,6 @@
+# See https://github.com/crate-ci/typos/blob/master/docs/reference.md to configure typos
+[default.extend-words]
+ba = "ba"
+fo = "fo"
+enew = "enew"
+tabe = "tabe"