0.15.4

This is a breaking change, but I believe it makes much more sense. It is
almost impossible to predict which entries will be filtered out due to
a fuzzy inverse term. You can still perform inverse-fuzzy-match by
prepending `!'` to the term.

| Token    | Match type                 | Description                       |
| -------- | -------------------------- | --------------------------------- |
| `sbtrkt` | fuzzy-match                | Items that match `sbtrkt`         |
| `^music` | prefix-exact-match         | Items that start with `music`     |
| `.mp3$`  | suffix-exact-match         | Items that end with `.mp3`        |
| `'wild`  | exact-match (quoted)       | Items that include `wild`         |
| `!fire`  | inverse-exact-match        | Items that do not include `fire`  |
| `!.mp3$` | inverse-suffix-exact-match | Items that do not end with `.mp3` |

.github/ISSUE_TEMPLATE.md

@@ -0,0 +1,29 @@
+<!-- Check all that apply [x] -->
+- Category
+    - [ ] fzf binary
+    - [ ] fzf-tmux script
+    - [ ] Key bindings
+    - [ ] Completion
+    - [ ] Vim
+    - [ ] Neovim
+    - [ ] Etc.
+- OS
+    - [ ] Linux
+    - [ ] Mac OS X
+    - [ ] Windows
+    - [ ] Etc.
+- Shell
+    - [ ] bash
+    - [ ] zsh
+    - [ ] fish
+
+<!--
+### Before submitting
+
+- Make sure that you have the latest version of fzf
+- If you use tmux, make sure $TERM is set to screen or screen-256color
+- For more Vim stuff, check out https://github.com/junegunn/fzf.vim
+
+Describe your problem or suggestion from here ...
+-->
+

CHANGELOG.md

@@ -1,6 +1,110 @@
 CHANGELOG
 =========
 
+0.15.4
+------
+- Added support for range expression in preview and execute action
+    - e.g. `ls -l | fzf --preview="echo user={3} when={-4..-2}; cat {-1}" --header-lines=1`
+    - `{q}` will be replaced to the single-quoted string of the current query
+- Fixed to properly handle unicode whitespace characters
+- Display scroll indicator in preview window
+- Inverse search term will use exact matcher by default
+    - This is a breaking change, but I believe it makes much more sense. It is
+      almost impossible to predict which entries will be filtered out due to
+      a fuzzy inverse term. You can still perform inverse-fuzzy-match by
+      prepending `!'` to the term.
+
+0.15.3
+------
+- Added support for more ANSI attributes: dim, underline, blink, and reverse
+- Fixed race condition in `toggle-preview`
+
+0.15.2
+------
+- Preview window is now scrollable
+    - With mouse scroll or with bindable actions
+        - `preview-up`
+        - `preview-down`
+        - `preview-page-up`
+        - `preview-page-down`
+- Updated ANSI processor to support high intensity colors and ignore
+  some VT100-related escape sequences
+
+0.15.1
+------
+- Fixed panic when the pattern occurs after 2^15-th column
+- Fixed rendering delay when displaying extremely long lines
+
+0.15.0
+------
+- Improved fuzzy search algorithm
+    - Added `--algo=[v1|v2]` option so one can still choose the old algorithm
+      which values the search performance over the quality of the result
+- Advanced scoring criteria
+- `--read0` to read input delimited by ASCII NUL character
+- `--print0` to print output delimited by ASCII NUL character
+
+0.13.5
+------
+- Memory and performance optimization
+    - Up to 2x performance with half the amount of memory
+
+0.13.4
+------
+- Performance optimization
+    - Memory footprint for ascii string is reduced by 60%
+    - 15 to 20% improvement of query performance
+    - Up to 45% better performance of `--nth` with non-regex delimiters
+- Fixed invalid handling of `hidden` property of `--preview-window`
+
+0.13.3
+------
+- Fixed duplicate rendering of the last line in preview window
+
+0.13.2
+------
+- Fixed race condition where preview window is not properly cleared
+
+0.13.1
+------
+- Fixed UI issue with large `--preview` output with many ANSI codes
+
+0.13.0
+------
+- Added preview feature
+    - `--preview CMD`
+    - `--preview-window POS[:SIZE][:hidden]`
+- `{}` in execute action is now replaced to the single-quoted (instead of
+  double-quoted) string of the current line
+- Fixed to ignore control characters for bracketed paste mode
+
+0.12.2
+------
+
+- 256-color capability detection does not require `256` in `$TERM`
+- Added `print-query` action
+- More named keys for binding; <kbd>F1</kbd> ~ <kbd>F10</kbd>,
+  <kbd>ALT-/</kbd>, <kbd>ALT-space</kbd>, and <kbd>ALT-enter</kbd>
+- Added `jump` and `jump-accept` actions that implement [EasyMotion][em]-like
+  movement
+  ![][jump]
+
+[em]: https://github.com/easymotion/vim-easymotion
+[jump]: https://cloud.githubusercontent.com/assets/700826/15367574/b3999dc4-1d64-11e6-85da-28ceeb1a9bc2.png
+
+0.12.1
+------
+
+- Ranking algorithm introduced in 0.12.0 is now universally applied
+- Fixed invalid cache reference in exact mode
+- Fixes and improvements in Vim plugin and shell extensions
+
+0.12.0
+------
+
+- Enhanced ranking algorithm
+- Minor bug fixes
+
 0.11.4
 ------
 

README.md

@@ -10,18 +10,15 @@ Pros
 
 - No dependencies
 - Blazingly fast
-    - e.g. `locate / | fzf`
-- Flexible layout
-    - Runs in fullscreen or in horizontal/vertical split using tmux
 - The most comprehensive feature set
-    - Try `fzf --help` and be surprised
+- Flexible layout using tmux panes
 - Batteries included
     - Vim/Neovim plugin, key bindings and fuzzy auto-completion
 
 Installation
 ------------
 
-fzf project consists of the followings:
+fzf project consists of the following components:
 
 - `fzf` executable
 - `fzf-tmux` script for launching fzf in a tmux pane
@@ -30,12 +27,12 @@ fzf project consists of the followings:
     - Fuzzy auto-completion (bash, zsh)
 - Vim/Neovim plugin
 
-You can [download fzf executable][bin] alone, but it's recommended that you
-install the extra stuff using the attached install script.
+You can [download fzf executable][bin] alone if you don't need the extra
+stuff.
 
 [bin]: https://github.com/junegunn/fzf-bin/releases
 
-#### Using git (recommended)
+### Using git
 
 Clone this repository and run
 [install](https://github.com/junegunn/fzf/blob/master/install) script.
@@ -45,7 +42,7 @@ git clone --depth 1 https://github.com/junegunn/fzf.git ~/.fzf
 ~/.fzf/install
 ```
 
-#### Using Homebrew
+### Using Homebrew
 
 On OS X, you can use [Homebrew](http://brew.sh/) to install fzf.
 
@@ -56,26 +53,30 @@ brew install fzf
 /usr/local/opt/fzf/install
 ```
 
-#### Install as Vim plugin
+### Vim plugin
 
-Once you have cloned the repository, add the following line to your .vimrc.
+You can manually add the directory to `&runtimepath` as follows,
 
 ```vim
+" If installed using git
 set rtp+=~/.fzf
+
+" If installed using Homebrew
+set rtp+=/usr/local/opt/fzf
 ```
 
-Or you can have [vim-plug](https://github.com/junegunn/vim-plug) manage fzf
-(recommended):
+But it's recommended that you use a plugin manager like
+[vim-plug](https://github.com/junegunn/vim-plug).
 
 ```vim
 Plug 'junegunn/fzf', { 'dir': '~/.fzf', 'do': './install --all' }
 ```
 
-#### Upgrading fzf
+### Upgrading fzf
 
 fzf is being actively developed and you might want to upgrade it once in a
 while. Please follow the instruction below depending on the installation
-method.
+method used.
 
 - git: `cd ~/.fzf && git pull && ./install`
 - brew: `brew update; brew reinstall fzf`
@@ -112,16 +113,16 @@ vim $(fzf)
 
 Unless otherwise specified, fzf starts in "extended-search mode" where you can
 type in multiple search terms delimited by spaces. e.g. `^music .mp3$ sbtrkt
-!rmx`
+!fire`
 
-| Token    | Match type           | Description                      |
-| -------- | -------------------- | -------------------------------- |
-| `sbtrkt` | fuzzy-match          | Items that match `sbtrkt`        |
-| `^music` | prefix-exact-match   | Items that start with `music`    |
-| `.mp3$`  | suffix-exact-match   | Items that end with `.mp3`       |
-| `'wild`  | exact-match (quoted) | Items that include `wild`        |
-| `!rmx`   | inverse-fuzzy-match  | Items that do not match `rmx`    |
-| `!'fire` | inverse-exact-match  | Items that do not include `fire` |
+| Token    | Match type                 | Description                       |
+| -------- | -------------------------- | --------------------------------- |
+| `sbtrkt` | fuzzy-match                | Items that match `sbtrkt`         |
+| `^music` | prefix-exact-match         | Items that start with `music`     |
+| `.mp3$`  | suffix-exact-match         | Items that end with `.mp3`        |
+| `'wild`  | exact-match (quoted)       | Items that include `wild`         |
+| `!fire`  | inverse-exact-match        | Items that do not include `fire`  |
+| `!.mp3$` | inverse-suffix-exact-match | Items that do not end with `.mp3` |
 
 If you don't prefer fuzzy matching and do not wish to "quote" every word,
 start fzf with `-e` or `--exact` option. Note that when  `--exact` is set,
@@ -151,27 +152,6 @@ Many useful examples can be found on [the wiki
 page](https://github.com/junegunn/fzf/wiki/examples). Feel free to add your
 own as well.
 
-Key bindings for command line
------------------------------
-
-The install script will setup the following key bindings for bash, zsh, and
-fish.
-
-- `CTRL-T` - Paste the selected files and directories onto the command line
-    - Set `FZF_CTRL_T_COMMAND` to override the default command
-- `CTRL-R` - Paste the selected command from history onto the command line
-    - Sort is disabled by default to respect chronological ordering
-    - Press `CTRL-R` again to toggle sort
-- `ALT-C` - cd into the selected directory
-
-If you're on a tmux session, fzf will start in a split pane. You may disable
-this tmux integration by setting `FZF_TMUX` to 0, or change the height of the
-pane with `FZF_TMUX_HEIGHT` (e.g. `20`, `50%`).
-
-If you use vi mode on bash, you need to add `set -o vi` *before* `source
-~/.fzf.bash` in your .bashrc, so that it correctly sets up key bindings for vi
-mode.
-
 `fzf-tmux` script
 -----------------
 
@@ -191,6 +171,31 @@ cat /usr/share/dict/words | fzf-tmux -l 20% --multi --reverse
 It will still work even when you're not on tmux, silently ignoring `-[udlr]`
 options, so you can invariably use `fzf-tmux` in your scripts.
 
+Key bindings for command line
+-----------------------------
+
+The install script will setup the following key bindings for bash, zsh, and
+fish.
+
+- `CTRL-T` - Paste the selected files and directories onto the command line
+    - Set `FZF_CTRL_T_COMMAND` to override the default command
+    - Set `FZF_CTRL_T_OPTS` to pass additional options
+- `CTRL-R` - Paste the selected command from history onto the command line
+    - Sort is disabled by default to respect chronological ordering
+    - Press `CTRL-R` again to toggle sort
+    - Set `FZF_CTRL_R_OPTS` to pass additional options
+- `ALT-C` - cd into the selected directory
+    - Set `FZF_ALT_C_COMMAND` to override the default command
+    - Set `FZF_ALT_C_OPTS` to pass additional options
+
+If you're on a tmux session, fzf will start in a split pane. You may disable
+this tmux integration by setting `FZF_TMUX` to 0, or change the height of the
+pane with `FZF_TMUX_HEIGHT` (e.g. `20`, `50%`).
+
+If you use vi mode on bash, you need to add `set -o vi` *before* `source
+~/.fzf.bash` in your .bashrc, so that it correctly sets up key bindings for vi
+mode.
+
 Fuzzy completion for bash and zsh
 ---------------------------------
 
@@ -300,7 +305,7 @@ If you have set up fzf for Vim, `:FZF` command will be added.
 :FZF ~
 
 " With options
-:FZF --no-sort -m /tmp
+:FZF --no-sort --reverse --inline-info /tmp
 
 " Bang version starts in fullscreen instead of using tmux pane or Neovim split
 :FZF!
@@ -316,10 +321,10 @@ customization.
 
 [fzf-config]: https://github.com/junegunn/fzf/wiki/Configuring-FZF-command-(vim)
 
-#### `fzf#run([options])`
+#### `fzf#run`
 
-For more advanced uses, you can use `fzf#run()` function with the following
-options.
+For more advanced uses, you can use `fzf#run([options])` function with the
+following options.
 
 | Option name                | Type          | Description                                                      |
 | -------------------------- | ------------- | ---------------------------------------------------------------- |
@@ -338,12 +343,23 @@ options.
 Examples can be found on [the wiki
 page](https://github.com/junegunn/fzf/wiki/Examples-(vim)).
 
+#### `fzf#wrap`
+
+`fzf#wrap([name string,] [opts dict,] [fullscreen boolean])` is a helper
+function that decorates the options dictionary so that it understands
+`g:fzf_layout`, `g:fzf_action`, and `g:fzf_history_dir` like `:FZF`.
+
+```vim
+command! -bang MyStuff
+  \ call fzf#run(fzf#wrap('my-stuff', {'dir': '~/my-stuff'}, <bang>0))
+```
+
 Tips
 ----
 
 #### Rendering issues
 
-If you have any rendering issues, check the followings:
+If you have any rendering issues, check the following:
 
 1. Make sure `$TERM` is correctly set. fzf will use 256-color only if it
    contains `256` (e.g. `xterm-256color`)
@@ -375,6 +391,12 @@ fzf
 export FZF_CTRL_T_COMMAND="$FZF_DEFAULT_COMMAND"
 ```
 
+If you don't want to exclude hidden files, use the following command:
+
+```sh
+export FZF_DEFAULT_COMMAND='ag --hidden --ignore .git -g ""'
+```
+
 #### `git ls-tree` for fast traversal
 
 If you're running fzf in a large git repository, `git ls-tree` can boost up the

bin/fzf-tmux

@@ -2,24 +2,51 @@
 # fzf-tmux: starts fzf in a tmux pane
 # usage: fzf-tmux [-u|-d [HEIGHT[%]]] [-l|-r [WIDTH[%]]] [--] [FZF OPTIONS]
 
+fail() {
+  >&2 echo "$1"
+  exit 2
+}
+
+fzf="$(command -v fzf 2> /dev/null)" || fzf="$(dirname "$0")/fzf"
+[[ -x "$fzf" ]] || fail 'fzf executable not found'
+
 args=()
 opt=""
 skip=""
 swap=""
 close=""
 term=""
-while [ $# -gt 0 ]; do
+[[ -n "$LINES" ]] && lines=$LINES || lines=$(tput lines)
+
+help() {
+  >&2 echo 'usage: fzf-tmux [-u|-d [HEIGHT[%]]] [-l|-r [WIDTH[%]]] [--] [FZF OPTIONS]
+
+  Layout
+    -u [HEIGHT[%]]  Split above (up)
+    -d [HEIGHT[%]]  Split below (down)
+    -l [WIDTH[%]]   Split left
+    -r [WIDTH[%]]   Split right
+
+    (default: -d 50%)
+'
+  exit
+}
+
+while [[ $# -gt 0 ]]; do
   arg="$1"
-  case "$arg" in
+  shift
+  [[ -z "$skip" ]] && case "$arg" in
     -)
       term=1
       ;;
+    --help)
+      help
+      ;;
+    --version)
+      echo "fzf-tmux (with fzf $("$fzf" --version))"
+      exit
+      ;;
     -w*|-h*|-d*|-u*|-r*|-l*)
-      if [ -n "$skip" ]; then
-        args+=("$1")
-        shift
-        continue
-      fi
       if [[ "$arg" =~ ^.[lrw] ]]; then
         opt="-h"
         if [[ "$arg" =~ ^.l ]]; then
@@ -35,35 +62,33 @@ while [ $# -gt 0 ]; do
           close="; tmux swap-pane -D"
         fi
       fi
-      if [ ${#arg} -gt 2 ]; then
+      if [[ ${#arg} -gt 2 ]]; then
         size="${arg:2}"
       else
-        shift
         if [[ "$1" =~ ^[0-9]+%?$ ]]; then
           size="$1"
-        else
-          [ -n "$1" -a "$1" != "--" ] && args+=("$1")
           shift
+        else
           continue
         fi
       fi
 
       if [[ "$size" =~ %$ ]]; then
         size=${size:0:((${#size}-1))}
-        if [ -n "$swap" ]; then
+        if [[ -n "$swap" ]]; then
           opt="$opt -p $(( 100 - size ))"
         else
           opt="$opt -p $size"
         fi
       else
-        if [ -n "$swap" ]; then
+        if [[ -n "$swap" ]]; then
           if [[ "$arg" =~ ^.l ]]; then
-            [ -n "$COLUMNS" ] && max=$COLUMNS || max=$(tput cols)
+            [[ -n "$COLUMNS" ]] && max=$COLUMNS || max=$(tput cols)
           else
-            [ -n "$LINES" ] && max=$LINES || max=$(tput lines)
+            max=$lines
           fi
           size=$(( max - size ))
-          [ $size -lt 0 ] && size=0
+          [[ $size -lt 0 ]] && size=0
           opt="$opt -l $size"
         else
           opt="$opt -l $size"
@@ -74,16 +99,17 @@ while [ $# -gt 0 ]; do
       # "--" can be used to separate fzf-tmux options from fzf options to
       # avoid conflicts
       skip=1
+      continue
       ;;
     *)
-      args+=("$1")
+      args+=("$arg")
       ;;
   esac
-  shift
+  [[ -n "$skip" ]] && args+=("$arg")
 done
 
-if [ -z "$TMUX" ]; then
-  fzf "${args[@]}"
+if [[ -z "$TMUX" ]] || [[ "$lines" -le 15 ]]; then
+  "$fzf" "${args[@]}"
   exit $?
 fi
 
@@ -107,7 +133,7 @@ cleanup() {
   rm -f $argsf $fifo1 $fifo2 $fifo3
 
   # Remove temp window if we were zoomed
-  if [ -n "$zoomed" ]; then
+  if [[ -n "$zoomed" ]]; then
     tmux swap-pane -t $original_window \; \
       select-window -t $original_window \; \
       kill-window -t $tmp_window \; \
@@ -116,16 +142,9 @@ cleanup() {
 }
 trap cleanup EXIT SIGINT SIGTERM
 
-fail() {
-  >&2 echo "$1"
-  exit 2
-}
-fzf="$(which fzf 2> /dev/null)" || fzf="$(dirname "$0")/fzf"
-[ -x "$fzf" ] || fail "fzf executable not found"
-
 envs="env TERM=$TERM "
-[ -n "$FZF_DEFAULT_OPTS"    ] && envs="$envs FZF_DEFAULT_OPTS=$(printf %q "$FZF_DEFAULT_OPTS")"
-[ -n "$FZF_DEFAULT_COMMAND" ] && envs="$envs FZF_DEFAULT_COMMAND=$(printf %q "$FZF_DEFAULT_COMMAND")"
+[[ -n "$FZF_DEFAULT_OPTS"    ]] && envs="$envs FZF_DEFAULT_OPTS=$(printf %q "$FZF_DEFAULT_OPTS")"
+[[ -n "$FZF_DEFAULT_COMMAND" ]] && envs="$envs FZF_DEFAULT_COMMAND=$(printf %q "$FZF_DEFAULT_COMMAND")"
 
 mkfifo -m o+w $fifo2
 mkfifo -m o+w $fifo3
@@ -133,22 +152,26 @@ mkfifo -m o+w $fifo3
 # Build arguments to fzf
 opts=""
 for arg in "${args[@]}"; do
+  arg="${arg//\\/\\\\}"
   arg="${arg//\"/\\\"}"
   arg="${arg//\`/\\\`}"
+  arg="${arg//$/\\$}"
   opts="$opts \"$arg\""
 done
 
-if [ -n "$term" -o -t 0 ]; then
-  cat <<< "$fzf $opts > $fifo2; echo \$? > $fifo3 $close" > $argsf
-  tmux set-window-option -q synchronize-panes off \;\
-    set-window-option -q remain-on-exit off \;\
-    split-window $opt "cd $(printf %q "$PWD");$envs bash $argsf" $swap
+if [[ -n "$term" ]] || [[ -t 0 ]]; then
+  cat <<< "\"$fzf\" $opts > $fifo2; echo \$? > $fifo3 $close" > $argsf
+  TMUX=$(echo $TMUX | cut -d , -f 1,2) tmux set-window-option synchronize-panes off \;\
+    set-window-option remain-on-exit off \;\
+    split-window $opt "cd $(printf %q "$PWD");$envs bash $argsf" $swap \
+    > /dev/null 2>&1
 else
   mkfifo $fifo1
-  cat <<< "$fzf $opts < $fifo1 > $fifo2; echo \$? > $fifo3 $close" > $argsf
-  tmux set-window-option -q synchronize-panes off \;\
-    set-window-option -q remain-on-exit off \;\
-    split-window $opt "$envs bash $argsf" $swap
+  cat <<< "\"$fzf\" $opts < $fifo1 > $fifo2; echo \$? > $fifo3 $close" > $argsf
+  TMUX=$(echo $TMUX | cut -d , -f 1,2) tmux set-window-option synchronize-panes off \;\
+    set-window-option remain-on-exit off \;\
+    split-window $opt "$envs bash $argsf" $swap \
+    > /dev/null 2>&1
   cat <&0 > $fifo1 &
 fi
 cat $fifo2

install

@@ -2,13 +2,14 @@
 
 set -u
 
-[[ "$@" =~ --pre ]] && version=0.11.4 pre=1 ||
-                       version=0.11.4 pre=0
+[[ "$@" =~ --pre ]] && version=0.15.4 pre=1 ||
+                       version=0.15.4 pre=0
 
 auto_completion=
 key_bindings=
-update_config=1
+update_config=2
 binary_arch=
+allow_legacy=
 
 help() {
   cat << EOF
@@ -27,7 +28,7 @@ usage: $0 [OPTIONS]
 EOF
 }
 
-for opt in $@; do
+for opt in "$@"; do
   case $opt in
     --help)
       help
@@ -37,6 +38,7 @@ for opt in $@; do
       auto_completion=1
       key_bindings=1
       update_config=1
+      allow_legacy=1
       ;;
     --key-bindings)    key_bindings=1    ;;
     --no-key-bindings) key_bindings=0    ;;
@@ -46,7 +48,7 @@ for opt in $@; do
     --no-update-rc)    update_config=0   ;;
     --32)              binary_arch=386   ;;
     --64)              binary_arch=amd64 ;;
-    --bin)             ;;
+    --bin|--pre)       ;;
     *)
       echo "unknown option: $opt"
       help
@@ -55,17 +57,14 @@ for opt in $@; do
   esac
 done
 
-cd $(dirname $BASH_SOURCE)
+cd "$(dirname "${BASH_SOURCE[0]}")"
 fzf_base="$(pwd)"
 
-# If stdin is a tty, we are "interactive".
-interactive=
-[ -t 0 ] && interactive=yes
-
 ask() {
+  # If stdin is a tty, we are "interactive".
   # non-interactive shell: wait for a linefeed
   #     interactive shell: continue after a single keypress
-  [ -n "$interactive" ] && read_n='-n 1' || read_n=
+  read_n=$([ -t 0 ] && echo "-n 1")
 
   read -p "$1 ([y]/n) " $read_n -r
   echo
@@ -103,7 +102,7 @@ symlink() {
 }
 
 link_fzf_in_path() {
-  if which_fzf="$(which fzf 2> /dev/null)"; then
+  if which_fzf="$(command -v fzf)"; then
     echo "  - Found in \$PATH"
     echo "  - Creating symlink: $which_fzf -> bin/fzf"
     (cd "$fzf_base"/bin && rm -f fzf && ln -sf "$which_fzf" fzf)
@@ -112,6 +111,14 @@ link_fzf_in_path() {
   return 1
 }
 
+try_curl() {
+  command -v curl > /dev/null && curl -fL $1 | tar -xz
+}
+
+try_wget() {
+  command -v wget > /dev/null && wget -O - $1 | tar -xz
+}
+
 download() {
   echo "Downloading bin/fzf ..."
   if [ $pre = 0 ]; then
@@ -131,14 +138,13 @@ download() {
   fi
 
   local url=https://github.com/junegunn/fzf-bin/releases/download/$version/${1}.tgz
-  if which curl > /dev/null; then
-    curl -fL $url | tar -xz
-  elif which wget > /dev/null; then
-    wget -O - $url | tar -xz
-  else
-    binary_error="curl or wget not found"
+  set -o pipefail
+  if ! (try_curl $url || try_wget $url); then
+    set +o pipefail
+    binary_error="Failed to download with curl and wget"
     return
   fi
+  set +o pipefail
 
   if [ ! -f $1 ]; then
     binary_error="Failed to download ${1}"
@@ -161,11 +167,14 @@ case "$archi" in
 esac
 
 install_ruby_fzf() {
+  if [ -z "$allow_legacy" ]; then
+    ask "Do you want to install legacy Ruby version instead?" && exit 1
+  fi
   echo "Installing legacy Ruby version ..."
 
   # ruby executable
   echo -n "Checking Ruby executable ... "
-  ruby=`which ruby`
+  ruby=$(command -v ruby)
   if [ $? -ne 0 ]; then
     echo "ruby executable not found !!!"
     exit 1
@@ -173,7 +182,7 @@ install_ruby_fzf() {
 
   # System ruby is preferred
   system_ruby=/usr/bin/ruby
-  if [ -x $system_ruby -a $system_ruby != "$ruby" ]; then
+  if [ -x $system_ruby ] && [ $system_ruby != "$ruby" ]; then
     $system_ruby --disable-gems -rcurses -e0 2> /dev/null
     [ $? -eq 0 ] && ruby=$system_ruby
   fi
@@ -232,22 +241,25 @@ cd "$fzf_base"
 if [ -n "$binary_error" ]; then
   if [ $binary_available -eq 0 ]; then
     echo "No prebuilt binary for $archi ..."
-    if which go > /dev/null 2>&1; then
-      echo -n "Building binary (go get github.com/junegunn/fzf/src/fzf) ... "
-      if go get github.com/junegunn/fzf/src/fzf; then
-        echo "OK"
-        link_fzf_in_path
-      else
-        echo "Failed to build binary ..."
-        install_ruby_fzf
-      fi
+  else
+    echo "  - $binary_error !!!"
+  fi
+  if command -v go > /dev/null; then
+    echo -n "Building binary (go get -u github.com/junegunn/fzf/src/fzf) ... "
+    if [ -z "${GOPATH-}" ]; then
+      export GOPATH="${TMPDIR:-/tmp}/fzf-gopath"
+      mkdir -p "$GOPATH"
+    fi
+    if go get -u github.com/junegunn/fzf/src/fzf; then
+      echo "OK"
+      cp "$GOPATH/bin/fzf" "$fzf_base/bin/"
     else
-      echo "go executable not found. Cannot build binary ..."
+      echo "Failed to build binary ..."
       install_ruby_fzf
     fi
   else
-    echo "  - $binary_error !!!"
-    exit 1
+    echo "go executable not found. Cannot build binary ..."
+    install_ruby_fzf
   fi
 fi
 
@@ -266,7 +278,9 @@ if [ -z "$key_bindings" ]; then
 fi
 
 echo
-for shell in bash zsh; do
+has_zsh=$(command -v zsh > /dev/null && echo 1 || echo 0)
+shells=$([ $has_zsh -eq 1 ] && echo "bash zsh" || echo "bash")
+for shell in $shells; do
   echo -n "Generate ~/.fzf.$shell ... "
   src=~/.fzf.${shell}
 
@@ -306,9 +320,8 @@ EOF
 done
 
 # fish
-has_fish=0
-if [ -n "$(which fish 2> /dev/null)" ]; then
-  has_fish=1
+has_fish=$(command -v fish > /dev/null && echo 1 || echo 0)
+if [ $has_fish -eq 1 ]; then
   echo -n "Update fish_user_paths ... "
   fish << EOF
   echo \$fish_user_paths | grep $fzf_base/bin > /dev/null
@@ -337,8 +350,8 @@ fi
 append_line() {
   set -e
 
-  local skip line file pat lno
-  skip="$1"
+  local update line file pat lno
+  update="$1"
   line="$2"
   file="$3"
   pat="${4:-}"
@@ -354,7 +367,7 @@ append_line() {
   if [ -n "$lno" ]; then
     echo "    - Already exists: line #$lno"
   else
-    if [ $skip -eq 1 ]; then
+    if [ $update -eq 1 ]; then
       echo >> "$file"
       echo "$line" >> "$file"
       echo "    + Added"
@@ -366,26 +379,30 @@ append_line() {
   set +e
 }
 
+if [ $update_config -eq 2 ]; then
+  echo
+  ask "Do you want to update your shell configuration files?"
+  update_config=$?
+fi
 echo
-for shell in bash zsh; do
+for shell in $shells; do
   [ $shell = zsh ] && dest=${ZDOTDIR:-~}/.zshrc || dest=~/.bashrc
   append_line $update_config "[ -f ~/.fzf.${shell} ] && source ~/.fzf.${shell}" "$dest" "~/.fzf.${shell}"
 done
 
-if [ $key_bindings -eq 1 -a $has_fish -eq 1 ]; then
+if [ $key_bindings -eq 1 ] && [ $has_fish -eq 1 ]; then
   bind_file=~/.config/fish/functions/fish_user_key_bindings.fish
   append_line $update_config "fzf_key_bindings" "$bind_file"
 fi
 
-cat << EOF
-Finished. Restart your shell or reload config file.
-   source ~/.bashrc  # bash
-   source ${ZDOTDIR:-~}/.zshrc   # zsh
-EOF
-[ $has_fish -eq 1 ] && echo "   fzf_key_bindings  # fish"; cat << EOF
-
-Use uninstall script to remove fzf.
-
-For more information, see: https://github.com/junegunn/fzf
-EOF
+if [ $update_config -eq 1 ]; then
+  echo 'Finished. Restart your shell or reload config file.'
+  echo '   source ~/.bashrc  # bash'
+  [ $has_zsh  -eq 1 ] && echo "   source ${ZDOTDIR:-~}/.zshrc   # zsh"
+  [ $has_fish -eq 1 ] && [ $key_bindings -eq 1 ] && echo '   fzf_key_bindings  # fish'
+  echo
+  echo 'Use uninstall script to remove fzf.'
+  echo
+fi
+echo 'For more information, see: https://github.com/junegunn/fzf'
 

man/man1/fzf-tmux.1

@@ -0,0 +1,54 @@
+.ig
+The MIT License (MIT)
+
+Copyright (c) 2016 Junegunn Choi
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+..
+.TH fzf-tmux 1 "Oct 2016" "fzf 0.15.4" "fzf-tmux - open fzf in tmux split pane"
+
+.SH NAME
+fzf-tmux - open fzf in tmux split pane
+
+.SH SYNOPSIS
+.B fzf-tmux [-u|-d [HEIGHT[%]]] [-l|-r [WIDTH[%]]] [--] [FZF OPTIONS]
+
+.SH DESCRIPTION
+fzf-tmux is a wrapper script for fzf that opens fzf in a tmux split pane. It is
+designed to work just like fzf except that it does not take up the whole
+screen. You can safely use fzf-tmux instead of fzf in your scripts as the extra
+options will be silently ignored if you're not on tmux.
+
+.SH OPTIONS
+.SS Layout
+
+(default: \fB-d 50%\fR)
+
+.TP
+.B "-u [height[%]]"
+Split above (up)
+.TP
+.B "-d [height[%]]"
+Split below (down)
+.TP
+.B "-l [width[%]]"
+Split left
+.TP
+.B "-r [width[%]]"
+Split right

man/man1/fzf.1

@@ -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 "Mar 2016" "fzf 0.11.4" "fzf - a command-line fuzzy finder"
+.TH fzf 1 "Oct 2016" "fzf 0.15.4" "fzf - a command-line fuzzy finder"
 
 .SH NAME
 fzf - a command-line fuzzy finder
@@ -47,13 +47,23 @@ Case-insensitive match (default: smart-case match)
 .TP
 .B "+i"
 Case-sensitive match
+.TP
+.BI "--algo=" TYPE
+Fuzzy matching algorithm (default: v2)
+
+.br
+.BR v2 "     Optimal scoring algorithm (quality)"
+.br
+.BR v1 "     Faster but not guaranteed to find the optimal result (performance)"
+.br
+
 .TP
 .BI "-n, --nth=" "N[,..]"
 Comma-separated list of field index expressions for limiting search scope.
-See \fBFIELD INDEX EXPRESSION\fR for details.
+See \fBFIELD INDEX EXPRESSION\fR for the details.
 .TP
 .BI "--with-nth=" "N[,..]"
-Transform each item using index expressions within finder
+Transform the presentation of each line using field index expressions
 .TP
 .BI "-d, --delimiter=" "STR"
 Field delimiter regex for \fB--nth\fR and \fB--with-nth\fR (default: AWK-style)
@@ -64,6 +74,7 @@ Do not sort the result
 .TP
 .B "--tac"
 Reverse the order of the input
+
 .RS
 e.g. \fBhistory | fzf --tac --no-sort\fR
 .RE
@@ -73,13 +84,13 @@ Comma-separated list of sort criteria to apply when the scores are tied.
 .br
 
 .br
-.BR length "  Prefers item with shorter length"
+.BR length "  Prefers line with shorter length"
 .br
-.BR begin "   Prefers item with matched substring closer to the beginning"
+.BR begin "   Prefers line with matched substring closer to the beginning"
 .br
-.BR end "     Prefers item with matched substring closer to the end"
+.BR end "     Prefers line with matched substring closer to the end"
 .br
-.BR index "   Prefers item that appeared earlier in the input stream"
+.BR index "   Prefers line that appeared earlier in the input stream"
 .br
 
 .br
@@ -90,16 +101,86 @@ Comma-separated list of sort criteria to apply when the scores are tied.
 - \fBindex\fR is implicitly appended to the list when not specified
 .br
 - Default is \fBlength\fR (or equivalently \fBlength\fR,index)
+.br
+- If \fBend\fR is found in the list, fzf will scan each line backwards
 .SS Interface
 .TP
 .B "-m, --multi"
 Enable multi-select with tab/shift-tab
 .TP
+.B "--no-mouse"
+Disable mouse
+.TP
+.BI "--bind=" "KEYBINDS"
+Comma-separated list of custom key bindings. See \fBKEY BINDINGS\fR for the
+details.
+.TP
+.B "--cycle"
+Enable cyclic scroll
+.TP
+.B "--no-hscroll"
+Disable horizontal scroll
+.TP
+.BI "--hscroll-off=" "COL"
+Number of screen columns to keep to the right of the highlighted substring
+(default: 10). Setting it to a large value will cause the text to be positioned
+on the center of the screen.
+.TP
+.BI "--jump-labels=" "CHARS"
+Label characters for \fBjump\fR and \fBjump-accept\fR
+.SS Layout
+.TP
+.B "--reverse"
+Reverse orientation
+.TP
+.BI "--margin=" MARGIN
+Comma-separated expression for margins around the finder.
+.br
+
+.br
+.RS
+.BR TRBL "     Same margin for top, right, bottom, and left"
+.br
+.BR TB,RL "    Vertical, horizontal margin"
+.br
+.BR T,RL,B "   Top, horizontal, bottom margin"
+.br
+.BR T,R,B,L "  Top, right, bottom, left margin"
+.br
+
+.br
+Each part can be given in absolute number or in percentage relative to the
+terminal size with \fB%\fR suffix.
+.br
+
+.br
+e.g. \fBfzf --margin 10%\fR
+     \fBfzf --margin 1,5%\fR
+.RE
+.TP
+.B "--inline-info"
+Display finder info inline with the query
+.TP
+.BI "--prompt=" "STR"
+Input prompt (default: '> ')
+.TP
+.BI "--header=" "STR"
+The given string will be printed as the sticky header. The lines are displayed
+in the given order from top to bottom regardless of \fB--reverse\fR option, and
+are not affected by \fB--with-nth\fR. ANSI color codes are processed even when
+\fB--ansi\fR is not set.
+.TP
+.BI "--header-lines=" "N"
+The first N lines of the input are treated as the sticky header. When
+\fB--with-nth\fR is set, the lines are transformed just like the other
+lines that follow.
+.SS Display
+.TP
 .B "--ansi"
 Enable processing of ANSI color codes
 .TP
-.B "--no-mouse"
-Disable mouse
+.BI "--tabstop=" SPACES
+Number of spaces for a tab character (default: 8)
 .TP
 .BI "--color=" "[BASE_SCHEME][,COLOR:ANSI]"
 Color configuration. The name of the base color scheme is followed by custom
@@ -137,172 +218,7 @@ e.g. \fBfzf --color=bg+:24\fR
 .TP
 .B "--black"
 Use black background
-.TP
-.B "--reverse"
-Reverse orientation
-.TP
-.BI "--margin=" MARGIN
-Comma-separated expression for margins around the finder.
-.br
-
-.br
-.RS
-.BR TRBL "     Same margin for top, right, bottom, and left"
-.br
-.BR TB,RL "    Vertical, horizontal margin"
-.br
-.BR T,RL,B "   Top, horizontal, bottom margin"
-.br
-.BR T,R,B,L "  Top, right, bottom, left margin"
-.br
-
-.br
-Each part can be given in absolute number or in percentage relative to the
-terminal size with \fB%\fR suffix.
-.br
-
-.br
-e.g. \fBfzf --margin 10%\fR
-     \fBfzf --margin 1,5%\fR
-.RE
-.TP
-.BI "--tabstop=" SPACES
-Number of spaces for a tab character (default: 8)
-.TP
-.B "--cycle"
-Enable cyclic scroll
-.TP
-.B "--no-hscroll"
-Disable horizontal scroll
-.TP
-.BI "--hscroll-off=" "COL"
-Number of screen columns to keep to the right of the highlighted substring
-(default: 10). Setting it to a large value will cause the text to be positioned
-on the center of the screen.
-.TP
-.B "--inline-info"
-Display finder info inline with the query
-.TP
-.BI "--prompt=" "STR"
-Input prompt (default: '> ')
-.TP
-.BI "--toggle-sort=" "KEY"
-Key to toggle sort. For the list of the allowed key names, see \fB--bind\fR.
-.TP
-.BI "--bind=" "KEYBINDS"
-Comma-separated list of custom key bindings. Each key binding expression
-follows the following format: \fBKEY:ACTION\fR
-.RS
-e.g. \fBfzf --bind=ctrl-j:accept,ctrl-k:kill-line\fR
-.RE
-
-.RS
-.B AVAILABLE KEYS:    (SYNONYMS)
-    \fIctrl-[a-z]\fR
-    \fIalt-[a-z]\fR
-    \fIf[1-4]\fR
-    \fIenter\fR       (\fIreturn\fR \fIctrl-m\fR)
-    \fIspace\fR
-    \fIbspace\fR      (\fIbs\fR)
-    \fIalt-bspace\fR  (\fIalt-bs\fR)
-    \fItab\fR
-    \fIbtab\fR        (\fIshift-tab\fR)
-    \fIesc\fR
-    \fIdel\fR
-    \fIup\fR
-    \fIdown\fR
-    \fIleft\fR
-    \fIright\fR
-    \fIhome\fR
-    \fIend\fR
-    \fIpgup\fR        (\fIpage-up\fR)
-    \fIpgdn\fR        (\fIpage-down\fR)
-    \fIshift-left\fR
-    \fIshift-right\fR
-    \fIdouble-click\fR
-    or any single character
-.RE
-
-.RS
-  \fBACTION:               DEFAULT BINDINGS (NOTES):
-    \fBabort\fR                 \fIctrl-c  ctrl-g  ctrl-q  esc\fR
-    \fBaccept\fR                \fIenter   double-click\fR
-    \fBbackward-char\fR         \fIctrl-b  left\fR
-    \fBbackward-delete-char\fR  \fIctrl-h  bspace\fR
-    \fBbackward-kill-word\fR    \fIalt-bs\fR
-    \fBbackward-word\fR         \fIalt-b   shift-left\fR
-    \fBbeginning-of-line\fR     \fIctrl-a  home\fR
-    \fBcancel\fR
-    \fBclear-screen\fR          \fIctrl-l\fR
-    \fBdelete-char\fR           \fIdel\fR
-    \fBdelete-char/eof\fR       \fIctrl-d\fR
-    \fBdeselect-all\fR
-    \fBdown\fR                  \fIctrl-j  ctrl-n  down\fR
-    \fBend-of-line\fR           \fIctrl-e  end\fR
-    \fBexecute(...)\fR          (see below for the details)
-    \fBexecute-multi(...)\fR    (see below for the details)
-    \fBforward-char\fR          \fIctrl-f  right\fR
-    \fBforward-word\fR          \fIalt-f   shift-right\fR
-    \fBignore\fR
-    \fBkill-line\fR
-    \fBkill-word\fR             \fIalt-d\fR
-    \fBnext-history\fR          (\fIctrl-n\fR on \fB--history\fR)
-    \fBpage-down\fR             \fIpgdn\fR
-    \fBpage-up\fR               \fIpgup\fR
-    \fBprevious-history\fR      (\fIctrl-p\fR on \fB--history\fR)
-    \fBselect-all\fR
-    \fBtoggle\fR
-    \fBtoggle-all\fR
-    \fBtoggle-down\fR           \fIctrl-i  (tab)\fR
-    \fBtoggle-in\fR             (\fB--reverse\fR ? \fBtoggle-up\fR : \fBtoggle-down\fR)
-    \fBtoggle-out\fR            (\fB--reverse\fR ? \fBtoggle-down\fR : \fBtoggle-up\fR)
-    \fBtoggle-sort\fR           (equivalent to \fB--toggle-sort\fR)
-    \fBtoggle-up\fR             \fIbtab    (shift-tab)\fR
-    \fBunix-line-discard\fR     \fIctrl-u\fR
-    \fBunix-word-rubout\fR      \fIctrl-w\fR
-    \fBup\fR                    \fIctrl-k  ctrl-p  up\fR
-    \fByank\fR                  \fIctrl-y\fR
-.RE
-
-.RS
-With \fBexecute(...)\fR action, you can execute arbitrary commands without
-leaving fzf. For example, you can turn fzf into a simple file browser by
-binding \fBenter\fR key to \fBless\fR command like follows.
-
-.RS
-\fBfzf --bind "enter:execute(less {})"\fR
-.RE
-
-\fB{}\fR is the placeholder for the double-quoted string of the current line.
-If the command contains parentheses, you can use any of the following
-alternative notations to avoid parse errors.
-
-    \fBexecute[...]\fR
-    \fBexecute~...~\fR
-    \fBexecute!...!\fR
-    \fBexecute@...@\fR
-    \fBexecute#...#\fR
-    \fBexecute$...$\fR
-    \fBexecute%...%\fR
-    \fBexecute^...^\fR
-    \fBexecute&...&\fR
-    \fBexecute*...*\fR
-    \fBexecute;...;\fR
-    \fBexecute/.../\fR
-    \fBexecute|...|\fR
-    \fBexecute:...\fR
-.RS
-This is the special form that frees you from parse errors as it does not expect
-the closing character. The catch is that it should be the last one in the
-comma-separated list.
-.RE
-
-\fBexecute-multi(...)\fR is an alternative action that executes the command
-with the selected entries when multi-select is enabled (\fB--multi\fR). With
-this action, \fB{}\fR is replaced with the double-quoted strings of the
-selected entries separated by spaces.
-
-.RE
+.SS History
 .TP
 .BI "--history=" "HISTORY_FILE"
 Load search history from the specified file and update the file on completion.
@@ -312,17 +228,40 @@ When enabled, \fBCTRL-N\fR and \fBCTRL-P\fR are automatically remapped to
 .BI "--history-size=" "N"
 Maximum number of entries in the history file (default: 1000). The file is
 automatically truncated when the number of the lines exceeds the value.
+.SS Preview
 .TP
-.BI "--header=" "STR"
-The given string will be printed as the sticky header. The lines are displayed
-in the given order from top to bottom regardless of \fB--reverse\fR option, and
-are not affected by \fB--with-nth\fR. ANSI color codes are processed even when
-\fB--ansi\fR is not set.
+.BI "--preview=" "COMMAND"
+Execute the given command for the current line and display the result on the
+preview window. \fB{}\fR in the command is the placeholder that is replaced to
+the single-quoted string of the current line. To transform the replacement
+string, specify field index expressions between the braces (See \fBFIELD INDEX
+EXPRESSION\fR for the details). Also, \fB{q}\fR is replaced to the current
+query string.
+
+.RS
+e.g. \fBfzf --preview="head -$LINES {}"\fR
+     \fBls -l | fzf --preview="echo user={3} when={-4..-2}; cat {-1}" --header-lines=1\fR
+
+Note that you can escape a placeholder pattern by prepending a backslash.
+.RE
 .TP
-.BI "--header-lines=" "N"
-The first N lines of the input are treated as the sticky header. When
-\fB--with-nth\fR is set, the lines are transformed just like the other
-lines that follow.
+.BI "--preview-window=" "[POSITION][:SIZE[%]][:hidden]"
+Determine the layout of the preview window. If the argument ends with
+\fB:hidden\fR, the preview window will be hidden by default until
+\fBtoggle-preview\fR action is triggered.
+
+.RS
+.B POSITION: (default: right)
+    \fBup
+    \fBdown
+    \fBleft
+    \fBright
+.RE
+
+.RS
+e.g. \fBfzf --preview="head {}" --preview-window=up:30%\fR
+     \fBfzf --preview="file {}" --preview-window=down:1\fR
+.RE
 .SS Scripting
 .TP
 .BI "-q, --query=" "STR"
@@ -347,18 +286,26 @@ the default enter key. When this option is set, fzf will print the name of the
 key pressed as the first line of its output (or as the second line if
 \fB--print-query\fR is also used). The line will be empty if fzf is completed
 with the default enter key.
+
 .RS
 e.g. \fBfzf --expect=ctrl-v,ctrl-t,alt-s,f1,f2,~,@\fR
 .RE
 .TP
+.B "--read0"
+Read input delimited by ASCII NUL character instead of newline character
+.TP
+.B "--print0"
+Print output delimited by ASCII NUL character instead of newline character
+.TP
 .B "--sync"
 Synchronous search for multi-staged filtering. If specified, fzf will launch
 ncurses finder only after the input stream is complete.
+
 .RS
 e.g. \fBfzf --multi | fzf --sync\fR
 .RE
 
-.SH ENVIRONMENT
+.SH ENVIRONMENT VARIABLES
 .TP
 .B FZF_DEFAULT_COMMAND
 Default command to use when input is tty
@@ -412,12 +359,12 @@ occurrences of the string.
 
 .SS Anchored-match
 A term can be prefixed by \fB^\fR, or suffixed by \fB$\fR to become an
-anchored-match term. Then fzf will search for the items that start with or end
+anchored-match term. Then fzf will search for the lines that start with or end
 with the given string. An anchored-match term is also an exact-match term.
 
 .SS Negation
-If a term is prefixed by \fB!\fR, fzf will exclude the items that satisfy the
-term from the result.
+If a term is prefixed by \fB!\fR, fzf will exclude the lines that satisfy the
+term from the result. In this case, fzf performs exact match by default.
 
 .SS Exact-match by default
 If you don't prefer fuzzy matching and do not wish to "quote" (prefixing with
@@ -431,6 +378,125 @@ query matches entries that start with \fBcore\fR and end with either \fBgo\fR,
 
 e.g. \fB^core go$ | rb$ | py$\fR
 
+.SH KEY BINDINGS
+You can customize key bindings of fzf with \fB--bind\fR option which takes
+a comma-separated list of key binding expressions. Each key binding expression
+follows the following format: \fBKEY:ACTION\fR
+
+e.g. \fBfzf --bind=ctrl-j:accept,ctrl-k:kill-line\fR
+
+.B AVAILABLE KEYS:    (SYNONYMS)
+    \fIctrl-[a-z]\fR
+    \fIalt-[a-z]\fR
+    \fIf[1-10]\fR
+    \fIenter\fR       (\fIreturn\fR \fIctrl-m\fR)
+    \fIspace\fR
+    \fIbspace\fR      (\fIbs\fR)
+    \fIalt-enter\fR
+    \fIalt-space\fR
+    \fIalt-bspace\fR  (\fIalt-bs\fR)
+    \fIalt-/\fR
+    \fItab\fR
+    \fIbtab\fR        (\fIshift-tab\fR)
+    \fIesc\fR
+    \fIdel\fR
+    \fIup\fR
+    \fIdown\fR
+    \fIleft\fR
+    \fIright\fR
+    \fIhome\fR
+    \fIend\fR
+    \fIpgup\fR        (\fIpage-up\fR)
+    \fIpgdn\fR        (\fIpage-down\fR)
+    \fIshift-left\fR
+    \fIshift-right\fR
+    \fIdouble-click\fR
+    or any single character
+
+  \fBACTION:               DEFAULT BINDINGS (NOTES):
+    \fBabort\fR                 \fIctrl-c  ctrl-g  ctrl-q  esc\fR
+    \fBaccept\fR                \fIenter   double-click\fR
+    \fBbackward-char\fR         \fIctrl-b  left\fR
+    \fBbackward-delete-char\fR  \fIctrl-h  bspace\fR
+    \fBbackward-kill-word\fR    \fIalt-bs\fR
+    \fBbackward-word\fR         \fIalt-b   shift-left\fR
+    \fBbeginning-of-line\fR     \fIctrl-a  home\fR
+    \fBcancel\fR
+    \fBclear-screen\fR          \fIctrl-l\fR
+    \fBdelete-char\fR           \fIdel\fR
+    \fBdelete-char/eof\fR       \fIctrl-d\fR
+    \fBdeselect-all\fR
+    \fBdown\fR                  \fIctrl-j  ctrl-n  down\fR
+    \fBend-of-line\fR           \fIctrl-e  end\fR
+    \fBexecute(...)\fR          (see below for the details)
+    \fBexecute-multi(...)\fR    (see below for the details)
+    \fBforward-char\fR          \fIctrl-f  right\fR
+    \fBforward-word\fR          \fIalt-f   shift-right\fR
+    \fBignore\fR
+    \fBjump\fR                  (EasyMotion-like 2-keystroke movement)
+    \fBjump-accept\fR           (jump and accept)
+    \fBkill-line\fR
+    \fBkill-word\fR             \fIalt-d\fR
+    \fBnext-history\fR          (\fIctrl-n\fR on \fB--history\fR)
+    \fBpage-down\fR             \fIpgdn\fR
+    \fBpage-up\fR               \fIpgup\fR
+    \fBpreview-down\fR
+    \fBpreview-up\fR
+    \fBpreview-page-down\fR
+    \fBpreview-page-up\fR
+    \fBprevious-history\fR      (\fIctrl-p\fR on \fB--history\fR)
+    \fBprint-query\fR           (print query and exit)
+    \fBselect-all\fR
+    \fBtoggle\fR
+    \fBtoggle-all\fR
+    \fBtoggle-down\fR           \fIctrl-i  (tab)\fR
+    \fBtoggle-in\fR             (\fB--reverse\fR ? \fBtoggle-up\fR : \fBtoggle-down\fR)
+    \fBtoggle-out\fR            (\fB--reverse\fR ? \fBtoggle-down\fR : \fBtoggle-up\fR)
+    \fBtoggle-preview\fR
+    \fBtoggle-sort\fR           (equivalent to \fB--toggle-sort\fR)
+    \fBtoggle-up\fR             \fIbtab    (shift-tab)\fR
+    \fBunix-line-discard\fR     \fIctrl-u\fR
+    \fBunix-word-rubout\fR      \fIctrl-w\fR
+    \fBup\fR                    \fIctrl-k  ctrl-p  up\fR
+    \fByank\fR                  \fIctrl-y\fR
+
+With \fBexecute(...)\fR action, you can execute arbitrary commands without
+leaving fzf. For example, you can turn fzf into a simple file browser by
+binding \fBenter\fR key to \fBless\fR command like follows.
+
+    \fBfzf --bind "enter:execute(less {})"\fR
+
+You can use the same placeholder expressions as in \fB--preview\fR.
+
+If the command contains parentheses, fzf may fail to parse the expression. In
+that case, you can use any of the following alternative notations to avoid
+parse errors.
+
+    \fBexecute[...]\fR
+    \fBexecute~...~\fR
+    \fBexecute!...!\fR
+    \fBexecute@...@\fR
+    \fBexecute#...#\fR
+    \fBexecute$...$\fR
+    \fBexecute%...%\fR
+    \fBexecute^...^\fR
+    \fBexecute&...&\fR
+    \fBexecute*...*\fR
+    \fBexecute;...;\fR
+    \fBexecute/.../\fR
+    \fBexecute|...|\fR
+    \fBexecute:...\fR
+.RS
+This is the special form that frees you from parse errors as it does not expect
+the closing character. The catch is that it should be the last one in the
+comma-separated list of key-action pairs.
+.RE
+
+\fBexecute-multi(...)\fR is an alternative action that executes the command
+with the selected entries when multi-select is enabled (\fB--multi\fR). With
+this action, \fB{}\fR is replaced with the quoted strings of the selected
+entries separated by spaces.
+
 .SH AUTHOR
 Junegunn Choi (\fIjunegunn.c@gmail.com\fR)
 

plugin/fzf.vim

@@ -21,7 +21,8 @@
 " OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 " WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
-let s:default_height = '40%'
+let s:default_layout = { 'down': '~40%' }
+let s:layout_keys = ['window', 'up', 'down', 'left', 'right']
 let s:fzf_go = expand('<sfile>:h:h').'/bin/fzf'
 let s:install = expand('<sfile>:h:h').'/install'
 let s:installed = 0
@@ -49,7 +50,7 @@ function! s:fzf_exec()
       throw 'fzf executable not found'
     endif
   endif
-  return s:exec
+  return s:shellesc(s:exec)
 endfunction
 
 function! s:tmux_enabled()
@@ -74,7 +75,7 @@ function! s:shellesc(arg)
 endfunction
 
 function! s:escape(path)
-  return escape(a:path, ' %#''"\')
+  return escape(a:path, ' $%#''"\')
 endfunction
 
 " Upgrade legacy options
@@ -104,11 +105,114 @@ function! s:warn(msg)
   echohl None
 endfunction
 
+function! s:has_any(dict, keys)
+  for key in a:keys
+    if has_key(a:dict, key)
+      return 1
+    endif
+  endfor
+  return 0
+endfunction
+
+function! s:open(cmd, target)
+  if stridx('edit', a:cmd) == 0 && fnamemodify(a:target, ':p') ==# expand('%:p')
+    return
+  endif
+  execute a:cmd s:escape(a:target)
+endfunction
+
+function! s:common_sink(action, lines) abort
+  if len(a:lines) < 2
+    return
+  endif
+  let key = remove(a:lines, 0)
+  let cmd = get(a:action, key, 'e')
+  if len(a:lines) > 1
+    augroup fzf_swap
+      autocmd SwapExists * let v:swapchoice='o'
+            \| call s:warn('fzf: E325: swap file exists: '.expand('<afile>'))
+    augroup END
+  endif
+  try
+    let empty = empty(expand('%')) && line('$') == 1 && empty(getline(1)) && !&modified
+    let autochdir = &autochdir
+    set noautochdir
+    for item in a:lines
+      if empty
+        execute 'e' s:escape(item)
+        let empty = 0
+      else
+        call s:open(cmd, item)
+      endif
+      if exists('#BufEnter') && isdirectory(item)
+        doautocmd BufEnter
+      endif
+    endfor
+  finally
+    let &autochdir = autochdir
+    silent! autocmd! fzf_swap
+  endtry
+endfunction
+
+" [name string,] [opts dict,] [fullscreen boolean]
+function! fzf#wrap(...)
+  let args = ['', {}, 0]
+  let expects = map(copy(args), 'type(v:val)')
+  let tidx = 0
+  for arg in copy(a:000)
+    let tidx = index(expects, type(arg), tidx)
+    if tidx < 0
+      throw 'invalid arguments (expected: [name string] [opts dict] [fullscreen boolean])'
+    endif
+    let args[tidx] = arg
+    let tidx += 1
+    unlet arg
+  endfor
+  let [name, opts, bang] = args
+
+  " Layout: g:fzf_layout (and deprecated g:fzf_height)
+  if bang
+    for key in s:layout_keys
+      if has_key(opts, key)
+        call remove(opts, key)
+      endif
+    endfor
+  elseif !s:has_any(opts, s:layout_keys)
+    if !exists('g:fzf_layout') && exists('g:fzf_height')
+      let opts.down = g:fzf_height
+    else
+      let opts = extend(opts, get(g:, 'fzf_layout', s:default_layout))
+    endif
+  endif
+
+  " History: g:fzf_history_dir
+  let opts.options = get(opts, 'options', '')
+  if len(name) && len(get(g:, 'fzf_history_dir', ''))
+    let dir = expand(g:fzf_history_dir)
+    if !isdirectory(dir)
+      call mkdir(dir, 'p')
+    endif
+    let opts.options = join(['--history', s:escape(dir.'/'.name), opts.options])
+  endif
+
+  " Action: g:fzf_action
+  if !s:has_any(opts, ['sink', 'sink*'])
+    let opts._action = get(g:, 'fzf_action', s:default_action)
+    let opts.options .= ' --expect='.join(keys(opts._action), ',')
+    function! opts.sink(lines) abort
+      return s:common_sink(self._action, a:lines)
+    endfunction
+    let opts['sink*'] = remove(opts, 'sink')
+  endif
+
+  return opts
+endfunction
+
 function! fzf#run(...) abort
 try
   let oshell = &shell
   set shell=sh
-  if has('nvim') && bufexists('term://*:FZF')
+  if has('nvim') && len(filter(range(1, bufnr('$')), 'bufname(v:val) =~# ";#FZF"'))
     call s:warn('FZF is already running!')
     return []
   endif
@@ -121,6 +225,12 @@ try
     throw v:exception
   endtry
 
+  if !has_key(dict, 'source') && !empty($FZF_DEFAULT_COMMAND)
+    let temps.source = tempname()
+    call writefile(split($FZF_DEFAULT_COMMAND, "\n"), temps.source)
+    let dict.source = (empty($SHELL) ? 'sh' : $SHELL) . ' ' . s:shellesc(temps.source)
+  endif
+
   if has_key(dict, 'source')
     let source = dict.source
     let type = type(source)
@@ -131,21 +241,21 @@ try
       call writefile(source, temps.input)
       let prefix = 'cat '.s:shellesc(temps.input).'|'
     else
-      throw 'Invalid source type'
+      throw 'invalid source type'
     endif
   else
     let prefix = ''
   endif
-  let tmux = !has('nvim') && s:tmux_enabled() && s:splittable(dict)
+  let tmux = (!has('nvim') || get(g:, 'fzf_prefer_tmux', 0)) && s:tmux_enabled() && s:splittable(dict)
   let command = prefix.(tmux ? s:fzf_tmux(dict) : fzf_exec).' '.optstr.' > '.temps.result
 
-  if has('nvim')
+  if has('nvim') && !tmux
     return s:execute_term(dict, command, temps)
   endif
 
-  let ret = tmux ? s:execute_tmux(dict, command, temps) : s:execute(dict, command, temps)
-  call s:popd(dict, ret)
-  return ret
+  let lines = tmux ? s:execute_tmux(dict, command, temps) : s:execute(dict, command, temps)
+  call s:callback(dict, lines)
+  return lines
 finally
   let &shell = oshell
 endtry
@@ -166,16 +276,16 @@ function! s:fzf_tmux(dict)
     if s:present(a:dict, o)
       let spec = a:dict[o]
       if (o == 'up' || o == 'down') && spec[0] == '~'
-        let size = '-'.o[0].s:calc_size(&lines, spec[1:], a:dict)
+        let size = '-'.o[0].s:calc_size(&lines, spec, a:dict)
       else
         " Legacy boolean option
-        let size = '-'.o[0].(spec == 1 ? '' : spec)
+        let size = '-'.o[0].(spec == 1 ? '' : substitute(spec, '^\~', '', ''))
       endif
       break
     endif
   endfor
   return printf('LINES=%d COLUMNS=%d %s %s %s --',
-    \ &lines, &columns, s:fzf_tmux, size, (has_key(a:dict, 'source') ? '' : '-'))
+    \ &lines, &columns, s:shellesc(s:fzf_tmux), size, (has_key(a:dict, 'source') ? '' : '-'))
 endfunction
 
 function! s:splittable(dict)
@@ -189,29 +299,24 @@ function! s:pushd(dict)
       return 1
     endif
     let a:dict.prev_dir = cwd
-    execute 'chdir' s:escape(a:dict.dir)
+    execute 'lcd' s:escape(a:dict.dir)
     let a:dict.dir = getcwd()
     return 1
   endif
   return 0
 endfunction
 
-function! s:popd(dict, lines)
-  " Since anything can be done in the sink function, there is no telling that
-  " the change of the working directory was made by &autochdir setting.
-  "
-  " We use the following heuristic to determine whether to restore CWD:
-  " - Always restore the current directory when &autochdir is disabled.
-  "   FIXME This makes it impossible to change directory from inside the sink
-  "   function when &autochdir is not used.
-  " - In case of an error or an interrupt, a:lines will be empty.
-  "   And it will be an array of a single empty string when fzf was finished
-  "   without a match. In these cases, we presume that the change of the
-  "   directory is not expected and should be undone.
-  if has_key(a:dict, 'prev_dir') &&
-        \ (!&autochdir || (empty(a:lines) || len(a:lines) == 1 && empty(a:lines[0])))
-    execute 'chdir' s:escape(remove(a:dict, 'prev_dir'))
+augroup fzf_popd
+  autocmd!
+  autocmd WinEnter * call s:dopopd()
+augroup END
+
+function! s:dopopd()
+  if !exists('w:fzf_prev_dir') || exists('*haslocaldir') && !haslocaldir()
+    return
   endif
+  execute 'lcd' s:escape(w:fzf_prev_dir)
+  unlet w:fzf_prev_dir
 endfunction
 
 function! s:xterm_launcher()
@@ -251,8 +356,9 @@ function! s:execute(dict, command, temps) abort
     let command = escaped
   endif
   execute 'silent !'.command
+  let exit_status = v:shell_error
   redraw!
-  return s:exit_handler(v:shell_error, command) ? s:callback(a:dict, a:temps) : []
+  return s:exit_handler(exit_status, command) ? s:collect(a:temps) : []
 endfunction
 
 function! s:execute_tmux(dict, command, temps) abort
@@ -263,15 +369,17 @@ function! s:execute_tmux(dict, command, temps) abort
   endif
 
   call system(command)
+  let exit_status = v:shell_error
   redraw!
-  return s:exit_handler(v:shell_error, command) ? s:callback(a:dict, a:temps) : []
+  return s:exit_handler(exit_status, command) ? s:collect(a:temps) : []
 endfunction
 
 function! s:calc_size(max, val, dict)
-  if a:val =~ '%$'
-    let size = a:max * str2nr(a:val[:-2]) / 100
+  let val = substitute(a:val, '^\~', '', '')
+  if val =~ '%$'
+    let size = a:max * str2nr(val[:-2]) / 100
   else
-    let size = min([a:max, str2nr(a:val)])
+    let size = min([a:max, str2nr(val)])
   endif
 
   let srcsz = -1
@@ -281,11 +389,12 @@ function! s:calc_size(max, val, dict)
 
   let opts = get(a:dict, 'options', '').$FZF_DEFAULT_OPTS
   let margin = stridx(opts, '--inline-info') > stridx(opts, '--no-inline-info') ? 1 : 2
+  let margin += stridx(opts, '--header') > stridx(opts, '--no-header')
   return srcsz >= 0 ? min([srcsz + margin, size]) : size
 endfunction
 
 function! s:getpos()
-  return {'tab': tabpagenr(), 'win': winnr(), 'cnt': winnr('$')}
+  return {'tab': tabpagenr(), 'win': winnr(), 'cnt': winnr('$'), 'tcnt': tabpagenr('$')}
 endfunction
 
 function! s:split(dict)
@@ -294,88 +403,131 @@ function! s:split(dict)
   \ 'down':  ['botright', 'resize', &lines],
   \ 'left':  ['vertical topleft', 'vertical resize', &columns],
   \ 'right': ['vertical botright', 'vertical resize', &columns] }
-  let s:ppos = s:getpos()
+  let ppos = s:getpos()
   try
     for [dir, triple] in items(directions)
       let val = get(a:dict, dir, '')
       if !empty(val)
         let [cmd, resz, max] = triple
         if (dir == 'up' || dir == 'down') && val[0] == '~'
-          let sz = s:calc_size(max, val[1:], a:dict)
+          let sz = s:calc_size(max, val, a:dict)
         else
           let sz = s:calc_size(max, val, {})
         endif
         execute cmd sz.'new'
         execute resz sz
-        return
+        return [ppos, {}]
       endif
     endfor
     if s:present(a:dict, 'window')
       execute a:dict.window
     else
-      tabnew
+      execute (tabpagenr()-1).'tabnew'
     endif
+    return [ppos, { '&l:wfw': &l:wfw, '&l:wfh': &l:wfh }]
   finally
-    setlocal winfixwidth winfixheight buftype=nofile bufhidden=wipe nobuflisted
+    setlocal winfixwidth winfixheight
   endtry
 endfunction
 
 function! s:execute_term(dict, command, temps) abort
-  call s:split(a:dict)
-
-  let fzf = { 'buf': bufnr('%'), 'dict': a:dict, 'temps': a:temps, 'name': 'FZF' }
-  let s:command = a:command
+  let winrest = winrestcmd()
+  let [ppos, winopts] = s:split(a:dict)
+  let fzf = { 'buf': bufnr('%'), 'ppos': ppos, 'dict': a:dict, 'temps': a:temps,
+            \ 'winopts': winopts, 'winrest': winrest, 'lines': &lines,
+            \ 'columns': &columns, 'command': a:command }
+  function! fzf.switch_back(inplace)
+    if a:inplace && bufnr('') == self.buf
+      " FIXME: Can't re-enter normal mode from terminal mode
+      " execute "normal! \<c-^>"
+      b #
+      " No other listed buffer
+      if bufnr('') == self.buf
+        enew
+      endif
+    endif
+  endfunction
   function! fzf.on_exit(id, code)
-    let pos = s:getpos()
-    let inplace = pos == s:ppos " {'window': 'enew'}
-    if !inplace
+    if s:getpos() == self.ppos " {'window': 'enew'}
+      for [opt, val] in items(self.winopts)
+        execute 'let' opt '=' val
+      endfor
+      call self.switch_back(1)
+    else
       if bufnr('') == self.buf
         " We use close instead of bd! since Vim does not close the split when
         " there's no other listed buffer (nvim +'set nobuflisted')
         close
       endif
-      if pos.tab == s:ppos.tab
-        wincmd p
-      endif
+      execute 'tabnext' self.ppos.tab
+      execute self.ppos.win.'wincmd w'
     endif
 
-    if !s:exit_handler(a:code, s:command, 1)
+    if bufexists(self.buf)
+      execute 'bd!' self.buf
+    endif
+
+    if &lines == self.lines && &columns == self.columns && s:getpos() == self.ppos
+      execute self.winrest
+    endif
+
+    if !s:exit_handler(a:code, self.command, 1)
       return
     endif
 
     call s:pushd(self.dict)
-    let ret = []
-    try
-      let ret = s:callback(self.dict, self.temps)
-
-      if inplace && bufnr('') == self.buf
-        execute "normal! \<c-^>"
-        " No other listed buffer
-        if bufnr('') == self.buf
-          bd!
-        endif
-      endif
-    finally
-      call s:popd(self.dict, ret)
-    endtry
+    let lines = s:collect(self.temps)
+    call s:callback(self.dict, lines)
+    call self.switch_back(s:getpos() == self.ppos)
   endfunction
 
-  call s:pushd(a:dict)
-  call termopen(a:command, fzf)
-  call s:popd(a:dict, [])
-  setlocal nospell
+  try
+    if s:present(a:dict, 'dir')
+      execute 'lcd' s:escape(a:dict.dir)
+    endif
+    call termopen(a:command . ';#FZF', fzf)
+  finally
+    if s:present(a:dict, 'dir')
+      lcd -
+    endif
+  endtry
+  setlocal nospell bufhidden=wipe nobuflisted
   setf fzf
   startinsert
   return []
 endfunction
 
-function! s:callback(dict, temps) abort
-let lines = []
-try
-  if filereadable(a:temps.result)
-    let lines = readfile(a:temps.result)
+function! s:collect(temps) abort
+  try
+    return filereadable(a:temps.result) ? readfile(a:temps.result) : []
+  finally
+    for tf in values(a:temps)
+      silent! call delete(tf)
+    endfor
+  endtry
+endfunction
+
+function! s:callback(dict, lines) abort
+  " Since anything can be done in the sink function, there is no telling that
+  " the change of the working directory was made by &autochdir setting.
+  "
+  " We use the following heuristic to determine whether to restore CWD:
+  " - Always restore the current directory when &autochdir is disabled.
+  "   FIXME This makes it impossible to change directory from inside the sink
+  "   function when &autochdir is not used.
+  " - In case of an error or an interrupt, a:lines will be empty.
+  "   And it will be an array of a single empty string when fzf was finished
+  "   without a match. In these cases, we presume that the change of the
+  "   directory is not expected and should be undone.
+  let popd = has_key(a:dict, 'prev_dir') &&
+        \ (!&autochdir || (empty(a:lines) || len(a:lines) == 1 && empty(a:lines[0])))
+  if popd
+    let w:fzf_prev_dir = a:dict.prev_dir
+  endif
+
+  try
     if has_key(a:dict, 'sink')
-      for line in lines
+      for line in a:lines
         if type(a:dict.sink) == 2
           call a:dict.sink(line)
         else
@@ -384,76 +536,40 @@ try
       endfor
     endif
     if has_key(a:dict, 'sink*')
-      call a:dict['sink*'](lines)
+      call a:dict['sink*'](a:lines)
     endif
-  endif
+  catch
+    if stridx(v:exception, ':E325:') < 0
+      echoerr v:exception
+    endif
+  endtry
 
-  for tf in values(a:temps)
-    silent! call delete(tf)
-  endfor
-catch
-  if stridx(v:exception, ':E325:') < 0
-    echoerr v:exception
+  " We may have opened a new window or tab
+  if popd
+    let w:fzf_prev_dir = a:dict.prev_dir
+    call s:dopopd()
   endif
-finally
-  return lines
-endtry
 endfunction
 
 let s:default_action = {
-  \ 'ctrl-m': 'e',
   \ 'ctrl-t': 'tab split',
   \ 'ctrl-x': 'split',
   \ 'ctrl-v': 'vsplit' }
 
-function! s:cmd_callback(lines) abort
-  if empty(a:lines)
-    return
-  endif
-  let key = remove(a:lines, 0)
-  let cmd = get(s:action, key, 'e')
-  if len(a:lines) > 1
-    augroup fzf_swap
-      autocmd SwapExists * let v:swapchoice='o'
-            \| call s:warn('fzf: E325: swap file exists: '.expand('<afile>'))
-    augroup END
-  endif
-  try
-    let empty = empty(expand('%')) && line('$') == 1 && empty(getline(1)) && !&modified
-    let autochdir = &autochdir
-    set noautochdir
-    for item in a:lines
-      if empty
-        execute 'e' s:escape(item)
-        let empty = 0
-      else
-        execute cmd s:escape(item)
-      endif
-      if exists('#BufEnter') && isdirectory(item)
-        doautocmd BufEnter
-      endif
-    endfor
-  finally
-    let &autochdir = autochdir
-    silent! autocmd! fzf_swap
-  endtry
-endfunction
-
 function! s:cmd(bang, ...) abort
-  let s:action = get(g:, 'fzf_action', s:default_action)
-  let args = extend(['--expect='.join(keys(s:action), ',')], a:000)
-  let opts = {}
-  if len(args) > 0 && isdirectory(expand(args[-1]))
-    let opts.dir = substitute(remove(args, -1), '\\\(["'']\)', '\1', 'g')
+  let args = copy(a:000)
+  let opts = { 'options': '--multi ' }
+  if len(args) && isdirectory(expand(args[-1]))
+    let opts.dir = substitute(substitute(remove(args, -1), '\\\(["'']\)', '\1', 'g'), '/*$', '/', '')
+    let opts.options .= ' --prompt '.shellescape(opts.dir)
+  else
+    let opts.options .= ' --prompt '.shellescape(pathshorten(getcwd()).'/')
   endif
-  if !a:bang
-    let opts.down = get(g:, 'fzf_height', get(g:, 'fzf_tmux_height', s:default_height))
-  endif
-  call fzf#run(extend({'options': join(args), 'sink*': function('<sid>cmd_callback')}, opts))
+  let opts.options .= ' '.join(args)
+  call fzf#run(fzf#wrap('FZF', opts, a:bang))
 endfunction
 
 command! -nargs=* -complete=dir -bang FZF call s:cmd(<bang>0, <f-args>)
 
 let &cpo = s:cpo_save
 unlet s:cpo_save
-

shell/completion.bash

@@ -14,7 +14,7 @@
 if ! declare -f _fzf_compgen_path > /dev/null; then
   _fzf_compgen_path() {
     echo "$1"
-    \find -L "$1" \
+    command find -L "$1" \
       -name .git -prune -o -name .svn -prune -o \( -type d -o -type f -o -type l \) \
       -a -not -path "$1" -print 2> /dev/null | sed 's@^\./@@'
   }
@@ -22,7 +22,7 @@ fi
 
 if ! declare -f _fzf_compgen_dir > /dev/null; then
   _fzf_compgen_dir() {
-    \find -L "$1" \
+    command find -L "$1" \
       -name .git -prune -o -name .svn -prune -o -type d \
       -a -not -path "$1" -print 2> /dev/null | sed 's@^\./@@'
   }
@@ -32,7 +32,7 @@ fi
 
 _fzf_orig_completion_filter() {
   sed 's/^\(.*-F\) *\([^ ]*\).* \([^ ]*\)$/export _fzf_orig_completion_\3="\1 %s \3 #\2";/' |
-  awk -F= '{gsub(/[^a-z0-9_= ;]/, "_", $1); print $1"="$2}'
+  awk -F= '{gsub(/[^A-Za-z0-9_= ;]/, "_", $1); print $1"="$2}'
 }
 
 _fzf_opts_completion() {
@@ -108,7 +108,7 @@ _fzf_handle_dynamic_completion() {
   elif [ -n "$_fzf_completion_loader" ]; then
     _completion_loader "$@"
     ret=$?
-    eval "$(complete | \grep "\-F.* $orig_cmd$" | _fzf_orig_completion_filter)"
+    eval "$(complete | command grep "\-F.* $orig_cmd$" | _fzf_orig_completion_filter)"
     source "${BASH_SOURCE[0]}"
     return $ret
   fi
@@ -117,7 +117,7 @@ _fzf_handle_dynamic_completion() {
 __fzf_generic_path_completion() {
   local cur base dir leftover matches trigger cmd fzf
   [ "${FZF_TMUX:-1}" != 0 ] && fzf="fzf-tmux -d ${FZF_TMUX_HEIGHT:-40%}" || fzf="fzf"
-  cmd=$(echo "${COMP_WORDS[0]}" | sed 's/[^a-z0-9_=]/_/g')
+  cmd="${COMP_WORDS[0]//[^A-Za-z0-9_=]/_}"
   COMPREPLY=()
   trigger=${FZF_COMPLETION_TRIGGER-'**'}
   cur="${COMP_WORDS[COMP_CWORD]}"
@@ -162,7 +162,7 @@ _fzf_complete() {
   type -t "$post" > /dev/null 2>&1 || post=cat
   [ "${FZF_TMUX:-1}" != 0 ] && fzf="fzf-tmux -d ${FZF_TMUX_HEIGHT:-40%}" || fzf="fzf"
 
-  cmd=$(echo "${COMP_WORDS[0]}" | sed 's/[^a-z0-9_=]/_/g')
+  cmd="${COMP_WORDS[0]//[^A-Za-z0-9_=]/_}"
   trigger=${FZF_COMPLETION_TRIGGER-'**'}
   cur="${COMP_WORDS[COMP_CWORD]}"
   if [[ "$cur" == *"$trigger" ]]; then
@@ -213,15 +213,16 @@ _fzf_complete_kill() {
 
 _fzf_complete_telnet() {
   _fzf_complete '+m' "$@" < <(
-    \grep -v '^\s*\(#\|$\)' /etc/hosts | \grep -Fv '0.0.0.0' |
+    command grep -v '^\s*\(#\|$\)' /etc/hosts | command grep -Fv '0.0.0.0' |
         awk '{if (length($2) > 0) {print $2}}' | sort -u
   )
 }
 
 _fzf_complete_ssh() {
   _fzf_complete '+m' "$@" < <(
-    cat <(cat ~/.ssh/config /etc/ssh/ssh_config 2> /dev/null | \grep -i '^host' | \grep -v '*') \
-        <(\grep -v '^\s*\(#\|$\)' /etc/hosts | \grep -Fv '0.0.0.0') |
+    cat <(cat ~/.ssh/config /etc/ssh/ssh_config 2> /dev/null | command grep -i '^host' | command grep -v '*') \
+        <(command grep -oE '^[^ ]+' ~/.ssh/known_hosts | tr ',' '\n' | awk '{ print $1 " " $1 }') \
+        <(command grep -v '^\s*\(#\|$\)' /etc/hosts | command grep -Fv '0.0.0.0') |
         awk '{if (length($2) > 0) {print $2}}' | sort -u
   )
 }
@@ -262,8 +263,8 @@ x_cmds="kill ssh telnet unset unalias export"
 # Preserve existing completion
 if [ "$_fzf_completion_loaded" != '0.11.3' ]; then
   # Really wish I could use associative array but OSX comes with bash 3.2 :(
-  eval $(complete | \grep '\-F' | \grep -v _fzf_ |
-    \grep -E " ($(echo $d_cmds $a_cmds $x_cmds | sed 's/ /|/g' | sed 's/+/\\+/g'))$" | _fzf_orig_completion_filter)
+  eval $(complete | command grep '\-F' | command grep -v _fzf_ |
+    command grep -E " ($(echo $d_cmds $a_cmds $x_cmds | sed 's/ /|/g' | sed 's/+/\\+/g'))$" | _fzf_orig_completion_filter)
   export _fzf_completion_loaded=0.11.3
 fi
 
@@ -272,14 +273,15 @@ if type _completion_loader > /dev/null 2>&1; then
 fi
 
 _fzf_defc() {
-  local cmd func opts orig_var orig
+  local cmd func opts orig_var orig def
   cmd="$1"
   func="$2"
   opts="$3"
-  orig_var="_fzf_orig_completion_$cmd"
+  orig_var="_fzf_orig_completion_${cmd//[^A-Za-z0-9_]/_}"
   orig="${!orig_var}"
   if [ -n "$orig" ]; then
-    eval "$(printf "$orig" "$func")"
+    printf -v def "$orig" "$func"
+    eval "$def"
   else
     complete -F "$func" $opts "$cmd"
   fi

shell/completion.zsh

@@ -14,7 +14,7 @@
 if ! declare -f _fzf_compgen_path > /dev/null; then
   _fzf_compgen_path() {
     echo "$1"
-    \find -L "$1" \
+    command find -L "$1" \
       -name .git -prune -o -name .svn -prune -o \( -type d -o -type f -o -type l \) \
       -a -not -path "$1" -print 2> /dev/null | sed 's@^\./@@'
   }
@@ -22,7 +22,7 @@ fi
 
 if ! declare -f _fzf_compgen_dir > /dev/null; then
   _fzf_compgen_dir() {
-    \find -L "$1" \
+    command find -L "$1" \
       -name .git -prune -o -name .svn -prune -o -type d \
       -a -not -path "$1" -print 2> /dev/null | sed 's@^\./@@'
   }
@@ -31,7 +31,7 @@ fi
 ###########################################################
 
 __fzf_generic_path_completion() {
-  local base lbuf compgen fzf_opts suffix tail fzf dir leftover matches nnm
+  local base lbuf compgen fzf_opts suffix tail fzf dir leftover matches
   # (Q) flag removes a quoting level: "foo\ bar" => "foo bar"
   base=${(Q)1}
   lbuf=$2
@@ -41,10 +41,7 @@ __fzf_generic_path_completion() {
   tail=$6
   [ ${FZF_TMUX:-1} -eq 1 ] && fzf="fzf-tmux -d ${FZF_TMUX_HEIGHT:-40%}" || fzf="fzf"
 
-  if ! setopt | \grep nonomatch > /dev/null; then
-    nnm=1
-    setopt nonomatch
-  fi
+  setopt localoptions nonomatch
   dir="$base"
   while [ 1 ]; do
     if [ -z "$dir" -o -d ${~dir} ]; then
@@ -54,19 +51,19 @@ __fzf_generic_path_completion() {
       [ "$dir" != "/" ] && dir="${dir/%\//}"
       dir=${~dir}
       matches=$(eval "$compgen $(printf %q "$dir")" | ${=fzf} ${=FZF_COMPLETION_OPTS} ${=fzf_opts} -q "$leftover" | while read item; do
-        printf "%q$suffix " "$item"
+        echo -n "${(q)item}$suffix "
       done)
       matches=${matches% }
       if [ -n "$matches" ]; then
         LBUFFER="$lbuf$matches$tail"
       fi
       zle redisplay
+      typeset -f zle-line-init >/dev/null && zle zle-line-init
       break
     fi
     dir=$(dirname "$dir")
     dir=${dir%/}/
   done
-  [ -n "$nnm" ] && unsetopt nonomatch
 }
 
 _fzf_path_completion() {
@@ -80,7 +77,7 @@ _fzf_dir_completion() {
 }
 
 _fzf_feed_fifo() (
-  rm -f "$1"
+  command rm -f "$1"
   mkfifo "$1"
   cat <&0 > "$1" &
 )
@@ -101,20 +98,22 @@ _fzf_complete() {
     LBUFFER="$lbuf$matches"
   fi
   zle redisplay
-  rm -f "$fifo"
+  typeset -f zle-line-init >/dev/null && zle zle-line-init
+  command rm -f "$fifo"
 }
 
 _fzf_complete_telnet() {
   _fzf_complete '+m' "$@" < <(
-    \grep -v '^\s*\(#\|$\)' /etc/hosts | \grep -Fv '0.0.0.0' |
+    command grep -v '^\s*\(#\|$\)' /etc/hosts | command grep -Fv '0.0.0.0' |
         awk '{if (length($2) > 0) {print $2}}' | sort -u
   )
 }
 
 _fzf_complete_ssh() {
   _fzf_complete '+m' "$@" < <(
-    cat <(cat ~/.ssh/config /etc/ssh/ssh_config 2> /dev/null | \grep -i '^host' | \grep -v '*') \
-        <(\grep -v '^\s*\(#\|$\)' /etc/hosts | \grep -Fv '0.0.0.0') |
+    cat <(cat ~/.ssh/config /etc/ssh/ssh_config 2> /dev/null | command grep -i '^host' | command grep -v '*') \
+        <(command grep -oE '^[^ ]+' ~/.ssh/known_hosts | tr ',' '\n' | awk '{ print $1 " " $1 }') \
+        <(command grep -v '^\s*\(#\|$\)' /etc/hosts | command grep -Fv '0.0.0.0') |
         awk '{if (length($2) > 0) {print $2}}' | sort -u
   )
 }
@@ -139,13 +138,13 @@ _fzf_complete_unalias() {
 
 fzf-completion() {
   local tokens cmd prefix trigger tail fzf matches lbuf d_cmds
-  setopt localoptions noshwordsplit
+  setopt localoptions noshwordsplit noksh_arrays
 
   # http://zsh.sourceforge.net/FAQ/zshfaq03.html
   # http://zsh.sourceforge.net/Doc/Release/Expansion.html#Parameter-Expansion-Flags
   tokens=(${(z)LBUFFER})
   if [ ${#tokens} -lt 1 ]; then
-    eval "zle ${fzf_default_completion:-expand-or-complete}"
+    zle ${fzf_default_completion:-expand-or-complete}
     return
   fi
 
@@ -164,6 +163,7 @@ fzf-completion() {
       LBUFFER="$LBUFFER$matches"
     fi
     zle redisplay
+    typeset -f zle-line-init >/dev/null && zle zle-line-init
   # Trigger sequence given
   elif [ ${#tokens} -gt 1 -a "$tail" = "$trigger" ]; then
     d_cmds=(${=FZF_COMPLETION_DIR_COMMANDS:-cd pushd rmdir})
@@ -180,12 +180,15 @@ fzf-completion() {
     fi
   # Fall back to default completion
   else
-    eval "zle ${fzf_default_completion:-expand-or-complete}"
+    zle ${fzf_default_completion:-expand-or-complete}
   fi
 }
 
-[ -z "$fzf_default_completion" ] &&
-  fzf_default_completion=$(bindkey '^I' | \grep -v undefined-key | awk '{print $2}')
+[ -z "$fzf_default_completion" ] && {
+  binding=$(bindkey '^I')
+  [[ $binding =~ 'undefined-key' ]] || fzf_default_completion=$binding[(s: :w)2]
+  unset binding
+}
 
 zle     -N   fzf-completion
 bindkey '^I' fzf-completion

shell/key-bindings.bash

@@ -5,7 +5,7 @@ __fzf_select__() {
     -o -type f -print \
     -o -type d -print \
     -o -type l -print 2> /dev/null | sed 1d | cut -b3-"}"
-  eval "$cmd" | fzf -m | while read -r item; do
+  eval "$cmd | fzf -m $FZF_CTRL_T_OPTS" | while read -r item; do
     printf '%q ' "$item"
   done
   echo
@@ -26,14 +26,16 @@ __fzf_select_tmux__() {
     height="-l $height"
   fi
 
-  tmux split-window $height "cd $(printf %q "$PWD"); FZF_DEFAULT_OPTS=$(printf %q "$FZF_DEFAULT_OPTS") PATH=$(printf %q "$PATH") FZF_CTRL_T_COMMAND=$(printf %q "$FZF_CTRL_T_COMMAND") bash -c 'source \"${BASH_SOURCE[0]}\"; tmux send-keys -t $TMUX_PANE \"\$(__fzf_select__)\"'"
+  tmux split-window $height "cd $(printf %q "$PWD"); FZF_DEFAULT_OPTS=$(printf %q "$FZF_DEFAULT_OPTS") PATH=$(printf %q "$PATH") FZF_CTRL_T_COMMAND=$(printf %q "$FZF_CTRL_T_COMMAND") FZF_CTRL_T_OPTS=$(printf %q "$FZF_CTRL_T_OPTS") bash -c 'source \"${BASH_SOURCE[0]}\"; RESULT=\"\$(__fzf_select__)\"; tmux setb -b fzf \"\$RESULT\" \\; pasteb -b fzf -t $TMUX_PANE \\; deleteb -b fzf || tmux send-keys -t $TMUX_PANE \"\$RESULT\"'"
 }
 
-__fzf_select_tmux_auto__() {
-  if [ "${FZF_TMUX:-1}" != 0 ] && [ ${LINES:-40} -gt 15 ]; then
+fzf-file-widget() {
+  if __fzf_use_tmux__; then
     __fzf_select_tmux__
   else
-    tmux send-keys -t "$TMUX_PANE" "$(__fzf_select__)"
+    local selected="$(__fzf_select__)"
+    READLINE_LINE="${READLINE_LINE:0:$READLINE_POINT}$selected${READLINE_LINE:$READLINE_POINT}"
+    READLINE_POINT=$(( READLINE_POINT + ${#selected} ))
   fi
 }
 
@@ -41,7 +43,7 @@ __fzf_cd__() {
   local cmd dir
   cmd="${FZF_ALT_C_COMMAND:-"command find -L . \\( -path '*/\\.*' -o -fstype 'dev' -o -fstype 'proc' \\) -prune \
     -o -type d -print 2> /dev/null | sed 1d | cut -b3-"}"
-  dir=$(eval "$cmd" | $(__fzfcmd) +m) && printf 'cd %q' "$dir"
+  dir=$(eval "$cmd | $(__fzfcmd) +m $FZF_ALT_C_OPTS") && printf 'cd %q' "$dir"
 }
 
 __fzf_history__() (
@@ -49,8 +51,8 @@ __fzf_history__() (
   shopt -u nocaseglob nocasematch
   line=$(
     HISTTIMEFORMAT= history |
-    $(__fzfcmd) +s --tac +m -n2..,.. --tiebreak=index --toggle-sort=ctrl-r |
-    \grep '^ *[0-9]') &&
+    eval "$(__fzfcmd) +s --tac +m -n2..,.. --tiebreak=index --toggle-sort=ctrl-r $FZF_CTRL_R_OPTS" |
+    command grep '^ *[0-9]') &&
     if [[ $- =~ H ]]; then
       sed 's/^ *\([0-9]*\)\** .*/!\1/' <<< "$line"
     else
@@ -58,21 +60,21 @@ __fzf_history__() (
     fi
 )
 
-__use_tmux=0
-__use_tmux_auto=0
-if [ -n "$TMUX_PANE" ]; then
-  [ "${FZF_TMUX:-1}" != 0 ] && [ ${LINES:-40} -gt 15 ] && __use_tmux=1
-  [ $BASH_VERSINFO -gt 3 ] && __use_tmux_auto=1
-fi
+__fzf_use_tmux__() {
+  [ -n "$TMUX_PANE" ] && [ "${FZF_TMUX:-1}" != 0 ] && [ ${LINES:-40} -gt 15 ]
+}
 
-if [ -z "$(set -o | \grep '^vi.*on')" ]; then
+[ $BASH_VERSINFO -gt 3 ] && __use_bind_x=1 || __use_bind_x=0
+__fzf_use_tmux__ && __use_tmux=1 || __use_tmux=0
+
+if [[ ! -o vi ]]; then
   # Required to refresh the prompt after fzf
   bind '"\er": redraw-current-line'
   bind '"\e^": history-expand-line'
 
   # CTRL-T - Paste the selected file path into the command line
-  if [ $__use_tmux_auto -eq 1 ]; then
-    bind -x '"\C-t": "__fzf_select_tmux_auto__"'
+  if [ $__use_bind_x -eq 1 ]; then
+    bind -x '"\C-t": "fzf-file-widget"'
   elif [ $__use_tmux -eq 1 ]; then
     bind '"\C-t": " \C-u \C-a\C-k$(__fzf_select_tmux__)\e\C-e\C-y\C-a\C-d\C-y\ey\C-h"'
   else
@@ -80,35 +82,44 @@ if [ -z "$(set -o | \grep '^vi.*on')" ]; then
   fi
 
   # CTRL-R - Paste the selected command from history into the command line
-  bind '"\C-r": " \C-e\C-u$(__fzf_history__)\e\C-e\e^\er"'
+  bind '"\C-r": " \C-e\C-u`__fzf_history__`\e\C-e\e^\er"'
 
   # ALT-C - cd into the selected directory
-  bind '"\ec": " \C-e\C-u$(__fzf_cd__)\e\C-e\er\C-m"'
+  bind '"\ec": " \C-e\C-u`__fzf_cd__`\e\C-e\er\C-m"'
 else
+  # We'd usually use "\e" to enter vi-movement-mode so we can do our magic,
+  # but this incurs a very noticeable delay of a half second or so,
+  # because many other commands start with "\e".
+  # Instead, we bind an unused key, "\C-x\C-a",
+  # to also enter vi-movement-mode,
+  # and then use that thereafter.
+  # (We imagine that "\C-x\C-a" is relatively unlikely to be in use.)
+  bind '"\C-x\C-a": vi-movement-mode'
+
   bind '"\C-x\C-e": shell-expand-line'
   bind '"\C-x\C-r": redraw-current-line'
   bind '"\C-x^": history-expand-line'
 
   # CTRL-T - Paste the selected file path into the command line
   # - FIXME: Selected items are attached to the end regardless of cursor position
-  if [ $__use_tmux_auto -eq 1 ]; then
-    bind -x '"\C-t": "__fzf_select_tmux_auto__"'
+  if [ $__use_bind_x -eq 1 ]; then
+    bind -x '"\C-t": "fzf-file-widget"'
   elif [ $__use_tmux -eq 1 ]; then
-    bind '"\C-t": "\e$a \eddi$(__fzf_select_tmux__)\C-x\C-e\e0P$xa"'
+    bind '"\C-t": "\C-x\C-a$a \C-x\C-addi$(__fzf_select_tmux__)\C-x\C-e\C-x\C-a0P$xa"'
   else
-    bind '"\C-t": "\e$a \eddi$(__fzf_select__)\C-x\C-e\e0Px$a \C-x\C-r\exa "'
+    bind '"\C-t": "\C-x\C-a$a \C-x\C-addi$(__fzf_select__)\C-x\C-e\C-x\C-a0Px$a \C-x\C-r\C-x\C-axa "'
   fi
   bind -m vi-command '"\C-t": "i\C-t"'
 
   # CTRL-R - Paste the selected command from history into the command line
-  bind '"\C-r": "\eddi$(__fzf_history__)\C-x\C-e\C-x^\e$a\C-x\C-r"'
+  bind '"\C-r": "\C-x\C-addi$(__fzf_history__)\C-x\C-e\C-x^\C-x\C-a$a\C-x\C-r"'
   bind -m vi-command '"\C-r": "i\C-r"'
 
   # ALT-C - cd into the selected directory
-  bind '"\ec": "\eddi$(__fzf_cd__)\C-x\C-e\C-x\C-r\C-m"'
-  bind -m vi-command '"\ec": "i\ec"'
+  bind '"\ec": "\C-x\C-addi$(__fzf_cd__)\C-x\C-e\C-x\C-r\C-m"'
+  bind -m vi-command '"\ec": "ddi$(__fzf_cd__)\C-x\C-e\C-x\C-r\C-m"'
 fi
 
-unset -v __use_tmux __use_tmux_auto
+unset -v __use_tmux __use_bind_x
 
 fi

shell/key-bindings.fish

@@ -13,32 +13,31 @@ function fzf_key_bindings
     end
   end
 
-  function __fzf_ctrl_t
+  function fzf-file-widget
     set -q FZF_CTRL_T_COMMAND; or set -l FZF_CTRL_T_COMMAND "
     command find -L . \\( -path '*/\\.*' -o -fstype 'dev' -o -fstype 'proc' \\) -prune \
       -o -type f -print \
       -o -type d -print \
       -o -type l -print 2> /dev/null | sed 1d | cut -b3-"
-    eval "$FZF_CTRL_T_COMMAND | "(__fzfcmd)" -m > $TMPDIR/fzf.result"
-    and sleep 0
-    and commandline -i (cat $TMPDIR/fzf.result | __fzf_escape)
+    eval "$FZF_CTRL_T_COMMAND | "(__fzfcmd)" -m $FZF_CTRL_T_OPTS > $TMPDIR/fzf.result"
+    and for i in (seq 20); commandline -i (cat $TMPDIR/fzf.result | __fzf_escape) 2> /dev/null; and break; sleep 0.1; end
     commandline -f repaint
     rm -f $TMPDIR/fzf.result
   end
 
-  function __fzf_ctrl_r
-    history | eval (__fzfcmd) +s +m --tiebreak=index --toggle-sort=ctrl-r > $TMPDIR/fzf.result
+  function fzf-history-widget
+    history | eval (__fzfcmd) +s +m --tiebreak=index --toggle-sort=ctrl-r $FZF_CTRL_R_OPTS > $TMPDIR/fzf.result
     and commandline (cat $TMPDIR/fzf.result)
     commandline -f repaint
     rm -f $TMPDIR/fzf.result
   end
 
-  function __fzf_alt_c
+  function fzf-cd-widget
     set -q FZF_ALT_C_COMMAND; or set -l FZF_ALT_C_COMMAND "
     command find -L . \\( -path '*/\\.*' -o -fstype 'dev' -o -fstype 'proc' \\) -prune \
       -o -type d -print 2> /dev/null | sed 1d | cut -b3-"
     # Fish hangs if the command before pipe redirects (2> /dev/null)
-    eval "$FZF_ALT_C_COMMAND | "(__fzfcmd)" +m > $TMPDIR/fzf.result"
+    eval "$FZF_ALT_C_COMMAND | "(__fzfcmd)" +m $FZF_ALT_C_OPTS > $TMPDIR/fzf.result"
     [ (cat $TMPDIR/fzf.result | wc -l) -gt 0 ]
     and cd (cat $TMPDIR/fzf.result)
     commandline -f repaint
@@ -59,14 +58,14 @@ function fzf_key_bindings
     end
   end
 
-  bind \ct '__fzf_ctrl_t'
-  bind \cr '__fzf_ctrl_r'
-  bind \ec '__fzf_alt_c'
+  bind \ct fzf-file-widget
+  bind \cr fzf-history-widget
+  bind \ec fzf-cd-widget
 
   if bind -M insert > /dev/null 2>&1
-    bind -M insert \ct '__fzf_ctrl_t'
-    bind -M insert \cr '__fzf_ctrl_r'
-    bind -M insert \ec '__fzf_alt_c'
+    bind -M insert \ct fzf-file-widget
+    bind -M insert \cr fzf-history-widget
+    bind -M insert \ec fzf-cd-widget
   end
 end
 

shell/key-bindings.zsh

@@ -8,10 +8,13 @@ __fsel() {
     -o -type f -print \
     -o -type d -print \
     -o -type l -print 2> /dev/null | sed 1d | cut -b3-"}"
-  eval "$cmd" | $(__fzfcmd) -m | while read item; do
-    printf '%q ' "$item"
+  setopt localoptions pipefail 2> /dev/null
+  eval "$cmd | $(__fzfcmd) -m $FZF_CTRL_T_OPTS" | while read item; do
+    echo -n "${(q)item} "
   done
+  local ret=$?
   echo
+  return $ret
 }
 
 __fzfcmd() {
@@ -20,7 +23,10 @@ __fzfcmd() {
 
 fzf-file-widget() {
   LBUFFER="${LBUFFER}$(__fsel)"
+  local ret=$?
   zle redisplay
+  typeset -f zle-line-init >/dev/null && zle zle-line-init
+  return $ret
 }
 zle     -N   fzf-file-widget
 bindkey '^T' fzf-file-widget
@@ -29,8 +35,12 @@ bindkey '^T' fzf-file-widget
 fzf-cd-widget() {
   local cmd="${FZF_ALT_C_COMMAND:-"command find -L . \\( -path '*/\\.*' -o -fstype 'dev' -o -fstype 'proc' \\) -prune \
     -o -type d -print 2> /dev/null | sed 1d | cut -b3-"}"
-  cd "${$(eval "$cmd" | $(__fzfcmd) +m):-.}"
+  setopt localoptions pipefail 2> /dev/null
+  cd "${$(eval "$cmd | $(__fzfcmd) +m $FZF_ALT_C_OPTS"):-.}"
+  local ret=$?
   zle reset-prompt
+  typeset -f zle-line-init >/dev/null && zle zle-line-init
+  return $ret
 }
 zle     -N    fzf-cd-widget
 bindkey '\ec' fzf-cd-widget
@@ -38,7 +48,9 @@ bindkey '\ec' fzf-cd-widget
 # CTRL-R - Paste the selected command from history into the command line
 fzf-history-widget() {
   local selected num
-  selected=( $(fc -l 1 | $(__fzfcmd) +s --tac +m -n2..,.. --tiebreak=index --toggle-sort=ctrl-r -q "${LBUFFER//$/\\$}") )
+  setopt localoptions noglobsubst pipefail 2> /dev/null
+  selected=( $(fc -l 1 | eval "$(__fzfcmd) +s --tac +m -n2..,.. --tiebreak=index --toggle-sort=ctrl-r $FZF_CTRL_R_OPTS -q ${(q)LBUFFER}") )
+  local ret=$?
   if [ -n "$selected" ]; then
     num=$selected[1]
     if [ -n "$num" ]; then
@@ -46,6 +58,8 @@ fzf-history-widget() {
     fi
   fi
   zle redisplay
+  typeset -f zle-line-init >/dev/null && zle zle-line-init
+  return $ret
 }
 zle     -N   fzf-history-widget
 bindkey '^R' fzf-history-widget

src/Dockerfile.centos

@@ -11,14 +11,18 @@ RUN cd / && curl \
     https://storage.googleapis.com/golang/go1.4.2.linux-amd64.tar.gz | \
     tar -xz && mv go go1.4
 
-# Install Go 1.5
+# Install Go 1.7
 RUN cd / && curl \
-    https://storage.googleapis.com/golang/go1.5.3.linux-amd64.tar.gz | \
-    tar -xz && mv go go1.5
+    https://storage.googleapis.com/golang/go1.7.linux-amd64.tar.gz | \
+    tar -xz && mv go go1.7
+
+# Install RPMs for building static 32-bit binary
+RUN curl ftp://ftp.pbone.net/mirror/ftp.centos.org/6.8/os/i386/Packages/ncurses-static-5.7-4.20090207.el6.i686.rpm -o rpm && rpm -i rpm && \
+    curl ftp://ftp.pbone.net/mirror/ftp.centos.org/6.8/os/i386/Packages/gpm-static-1.20.6-12.el6.i686.rpm -o rpm && rpm -i rpm
 
 ENV GOROOT_BOOTSTRAP /go1.4
-ENV GOROOT /go1.5
-ENV PATH /go1.5/bin:$PATH
+ENV GOROOT /go1.7
+ENV PATH /go1.7/bin:$PATH
 
 # For i386 build
 RUN cd $GOROOT/src && GOARCH=386 ./make.bash

src/Makefile

@@ -7,10 +7,6 @@ else ifeq ($(UNAME_S),Linux)
 endif
 endif
 
-ifneq ($(shell uname -m),x86_64)
-$(error "Build on $(UNAME_M) is not supported, yet.")
-endif
-
 SOURCES     := $(wildcard *.go */*.go)
 ROOTDIR     := $(shell dirname $(realpath $(lastword $(MAKEFILE_LIST))))
 BINDIR      := $(shell dirname $(ROOTDIR))/bin
@@ -26,15 +22,22 @@ RELEASE64   := fzf-$(VERSION)-$(GOOS)_amd64
 RELEASEARM7 := fzf-$(VERSION)-$(GOOS)_arm7
 export GOPATH
 
-all: release
+UNAME_M := $(shell uname -m)
+ifeq ($(UNAME_M),x86_64)
+	BINARY := $(BINARY64)
+else ifeq ($(UNAME_M),i686)
+	BINARY := $(BINARY32)
+else
+$(error "Build on $(UNAME_M) is not supported, yet.")
+endif
 
-release: test build
+all: fzf/$(BINARY)
+
+release: test fzf/$(BINARY32) fzf/$(BINARY64)
 	-cd fzf && cp $(BINARY32) $(RELEASE32) && tar -czf $(RELEASE32).tgz $(RELEASE32)
 	cd fzf && cp $(BINARY64) $(RELEASE64) && tar -czf $(RELEASE64).tgz $(RELEASE64) && \
 	rm -f $(RELEASE32) $(RELEASE64)
 
-build: fzf/$(BINARY32) fzf/$(BINARY64)
-
 $(SRCDIR):
 	mkdir -p $(shell dirname $(SRCDIR))
 	ln -s $(ROOTDIR) $(SRCDIR)
@@ -44,7 +47,7 @@ deps: $(SRCDIR) $(SOURCES)
 
 android-build: $(SRCDIR)
 	cd $(SRCDIR) && GOARCH=arm GOARM=7 CGO_ENABLED=1 go get
-	cd $(SRCDIR)/fzf && GOARCH=arm GOARM=7 CGO_ENABLED=1 go build -a -ldflags="-extldflags=-pie" -o $(BINARYARM7)
+	cd $(SRCDIR)/fzf && GOARCH=arm GOARM=7 CGO_ENABLED=1 go build -a -ldflags="-w -extldflags=-pie" -o $(BINARYARM7)
 	cd $(SRCDIR)/fzf && cp $(BINARYARM7) $(RELEASEARM7) && tar -czf $(RELEASEARM7).tgz $(RELEASEARM7) && \
 	rm -f $(RELEASEARM7)
 
@@ -54,20 +57,20 @@ test: deps
 install: $(BINDIR)/fzf
 
 uninstall:
-	rm -f $(BINDIR)/fzf $(BINDIR)/$(BINARY64)
+	rm -f $(BINDIR)/fzf $(BINDIR)/$(BINARY)
 
 clean:
 	cd fzf && rm -f fzf-*
 
 fzf/$(BINARY32): deps
-	cd fzf && GOARCH=386 CGO_ENABLED=1 go build -a -o $(BINARY32)
+	cd fzf && GOARCH=386 CGO_ENABLED=1 go build -a -ldflags -w -tags "$(TAGS)" -o $(BINARY32)
 
 fzf/$(BINARY64): deps
-	cd fzf && go build -a -tags "$(TAGS)" -o $(BINARY64)
+	cd fzf && go build -a -ldflags -w -tags "$(TAGS)" -o $(BINARY64)
 
-$(BINDIR)/fzf: fzf/$(BINARY64) | $(BINDIR)
-	cp -f fzf/$(BINARY64) $(BINDIR)
-	cd $(BINDIR) && ln -sf $(BINARY64) fzf
+$(BINDIR)/fzf: fzf/$(BINARY) | $(BINDIR)
+	cp -f fzf/$(BINARY) $(BINDIR)
+	cd $(BINDIR) && ln -sf $(BINARY) fzf
 
 $(BINDIR):
 	mkdir -p $@
@@ -98,7 +101,7 @@ centos: docker-centos
 
 linux: docker-centos
 	docker run $(DOCKEROPTS) junegunn/centos-sandbox \
-		/bin/bash -ci 'cd /fzf/src; make TAGS=static'
+		/bin/bash -ci 'cd /fzf/src; make TAGS=static release'
 
 ubuntu-android: docker-android
 	docker run $(DOCKEROPTS) junegunn/android-sandbox \
@@ -108,6 +111,6 @@ android: docker-android
 	docker run $(DOCKEROPTS) junegunn/android-sandbox \
 		/bin/bash -ci 'cd /fzf/src; GOOS=android make android-build'
 
-.PHONY: all build deps release test install uninstall clean \
+.PHONY: all deps release test install uninstall clean \
 	linux arch ubuntu centos docker-arch docker-ubuntu docker-centos \
 	android-build docker-android ubuntu-android android

src/README.md

@@ -47,39 +47,12 @@ proportional to the number of CPU cores. On my MacBook Pro (Mid 2012), the new
 version was shown to be an order of magnitude faster on certain cases. It also
 starts much faster though the difference may not be noticeable.
 
-Differences with Ruby version
------------------------------
-
-The Go version is designed to be perfectly compatible with the previous Ruby
-version. The only behavioral difference is that the new version ignores the
-numeric argument to `--sort=N` option and always sorts the result regardless
-of the number of matches. The value was introduced to limit the response time
-of the query, but the Go version is blazingly fast (almost instant response
-even for 1M+ items) so I decided that it's no longer required.
-
-System requirements
--------------------
-
-Currently, prebuilt binaries are provided only for OS X and Linux. The install
-script will fall back to the legacy Ruby version on the other systems, but if
-you have Go 1.4 installed, you can try building it yourself.
-
-However, as pointed out in [golang.org/doc/install][req], the Go version may
-not run on CentOS/RHEL 5.x, and if that's the case, the install script will
-choose the Ruby version instead.
-
-The Go version depends on [ncurses][ncurses] and some Unix system calls, so it
-shouldn't run natively on Windows at the moment. But it won't be impossible to
-support Windows by falling back to a cross-platform alternative such as
-[termbox][termbox] only on Windows. If you're interested in making fzf work on
-Windows, please let me know.
-
 Build
 -----
 
 ```sh
 # Build fzf executables and tarballs
-make
+make release
 
 # Install the executable to ../bin directory
 make install
@@ -88,16 +61,22 @@ make install
 make linux
 ```
 
-Contribution
-------------
+Test
+----
 
-For the time being, I will not add or accept any new features until we can be
-sure that the implementation is stable and we have a sufficient number of test
-cases. However, fixes for obvious bugs and new test cases are welcome.
+Unit tests can be run with `make test`. Integration tests are written in Ruby
+script that should be run on tmux.
 
-I also care much about the performance of the implementation, so please make
-sure that your change does not result in performance regression. And please be
-noted that we don't have a quantitative measure of the performance yet.
+```sh
+# Unit tests
+make test
+
+# Install the executable to ../bin directory
+make install
+
+# Integration tests
+ruby ../test/test_go.rb
+```
 
 Third-party libraries used
 --------------------------

src/algo/algo.go

@@ -1,51 +1,507 @@
 package algo
 
+/*
+
+Algorithm
+---------
+
+FuzzyMatchV1 finds the first "fuzzy" occurrence of the pattern within the given
+text in O(n) time where n is the length of the text. Once the position of the
+last character is located, it traverses backwards to see if there's a shorter
+substring that matches the pattern.
+
+    a_____b___abc__  To find "abc"
+    *-----*-----*>   1. Forward scan
+             <***    2. Backward scan
+
+The algorithm is simple and fast, but as it only sees the first occurrence,
+it is not guaranteed to find the occurrence with the highest score.
+
+    a_____b__c__abc
+    *-----*--*  ***
+
+FuzzyMatchV2 implements a modified version of Smith-Waterman algorithm to find
+the optimal solution (highest score) according to the scoring criteria. Unlike
+the original algorithm, omission or mismatch of a character in the pattern is
+not allowed.
+
+Performance
+-----------
+
+The new V2 algorithm is slower than V1 as it examines all occurrences of the
+pattern instead of stopping immediately after finding the first one. The time
+complexity of the algorithm is O(nm) if a match is found and O(n) otherwise
+where n is the length of the item and m is the length of the pattern. Thus, the
+performance overhead may not be noticeable for a query with high selectivity.
+However, if the performance is more important than the quality of the result,
+you can still choose v1 algorithm with --algo=v1.
+
+Scoring criteria
+----------------
+
+- We prefer matches at special positions, such as the start of a word, or
+  uppercase character in camelCase words.
+
+- That is, we prefer an occurrence of the pattern with more characters
+  matching at special positions, even if the total match length is longer.
+    e.g. "fuzzyfinder" vs. "fuzzy-finder" on "ff"
+                            ````````````
+- Also, if the first character in the pattern appears at one of the special
+  positions, the bonus point for the position is multiplied by a constant
+  as it is extremely likely that the first character in the typed pattern
+  has more significance than the rest.
+    e.g. "fo-bar" vs. "foob-r" on "br"
+          ``````
+- But since fzf is still a fuzzy finder, not an acronym finder, we should also
+  consider the total length of the matched substring. This is why we have the
+  gap penalty. The gap penalty increases as the length of the gap (distance
+  between the matching characters) increases, so the effect of the bonus is
+  eventually cancelled at some point.
+    e.g. "fuzzyfinder" vs. "fuzzy-blurry-finder" on "ff"
+          ```````````
+- Consequently, it is crucial to find the right balance between the bonus
+  and the gap penalty. The parameters were chosen that the bonus is cancelled
+  when the gap size increases beyond 8 characters.
+
+- The bonus mechanism can have the undesirable side effect where consecutive
+  matches are ranked lower than the ones with gaps.
+    e.g. "foobar" vs. "foo-bar" on "foob"
+                       ```````
+- To correct this anomaly, we also give extra bonus point to each character
+  in a consecutive matching chunk.
+    e.g. "foobar" vs. "foo-bar" on "foob"
+          ``````
+- The amount of consecutive bonus is primarily determined by the bonus of the
+  first character in the chunk.
+    e.g. "foobar" vs. "out-of-bound" on "oob"
+                       ````````````
+*/
+
 import (
+	"fmt"
 	"strings"
 	"unicode"
 
 	"github.com/junegunn/fzf/src/util"
 )
 
-/*
- * String matching algorithms here do not use strings.ToLower to avoid
- * performance penalty. And they assume pattern runes are given in lowercase
- * letters when caseSensitive is false.
- *
- * In short: They try to do as little work as possible.
- */
+var DEBUG bool
 
-func runeAt(runes []rune, index int, max int, forward bool) rune {
+func indexAt(index int, max int, forward bool) int {
 	if forward {
-		return runes[index]
+		return index
 	}
-	return runes[max-index-1]
+	return max - index - 1
 }
 
-// FuzzyMatch performs fuzzy-match
-func FuzzyMatch(caseSensitive bool, forward bool, runes []rune, pattern []rune) (int, int) {
-	if len(pattern) == 0 {
-		return 0, 0
+// Result contains the results of running a match function.
+type Result struct {
+	// TODO int32 should suffice
+	Start int
+	End   int
+	Score int
+}
+
+const (
+	scoreMatch        = 16
+	scoreGapStart     = -3
+	scoreGapExtention = -1
+
+	// We prefer matches at the beginning of a word, but the bonus should not be
+	// too great to prevent the longer acronym matches from always winning over
+	// shorter fuzzy matches. The bonus point here was specifically chosen that
+	// the bonus is cancelled when the gap between the acronyms grows over
+	// 8 characters, which is approximately the average length of the words found
+	// in web2 dictionary and my file system.
+	bonusBoundary = scoreMatch / 2
+
+	// Although bonus point for non-word characters is non-contextual, we need it
+	// for computing bonus points for consecutive chunks starting with a non-word
+	// character.
+	bonusNonWord = scoreMatch / 2
+
+	// Edge-triggered bonus for matches in camelCase words.
+	// Compared to word-boundary case, they don't accompany single-character gaps
+	// (e.g. FooBar vs. foo-bar), so we deduct bonus point accordingly.
+	bonusCamel123 = bonusBoundary + scoreGapExtention
+
+	// Minimum bonus point given to characters in consecutive chunks.
+	// Note that bonus points for consecutive matches shouldn't have needed if we
+	// used fixed match score as in the original algorithm.
+	bonusConsecutive = -(scoreGapStart + scoreGapExtention)
+
+	// The first character in the typed pattern usually has more significance
+	// than the rest so it's important that it appears at special positions where
+	// bonus points are given. e.g. "to-go" vs. "ongoing" on "og" or on "ogo".
+	// The amount of the extra bonus should be limited so that the gap penalty is
+	// still respected.
+	bonusFirstCharMultiplier = 2
+)
+
+type charClass int
+
+const (
+	charNonWord charClass = iota
+	charLower
+	charUpper
+	charLetter
+	charNumber
+)
+
+func posArray(withPos bool, len int) *[]int {
+	if withPos {
+		pos := make([]int, 0, len)
+		return &pos
+	}
+	return nil
+}
+
+func alloc16(offset int, slab *util.Slab, size int, clear bool) (int, []int16) {
+	if slab != nil && cap(slab.I16) > offset+size {
+		slice := slab.I16[offset : offset+size]
+		if clear {
+			for idx := range slice {
+				slice[idx] = 0
+			}
+		}
+		return offset + size, slice
+	}
+	return offset, make([]int16, size)
+}
+
+func alloc32(offset int, slab *util.Slab, size int, clear bool) (int, []int32) {
+	if slab != nil && cap(slab.I32) > offset+size {
+		slice := slab.I32[offset : offset+size]
+		if clear {
+			for idx := range slice {
+				slice[idx] = 0
+			}
+		}
+		return offset + size, slice
+	}
+	return offset, make([]int32, size)
+}
+
+func charClassOfAscii(char rune) charClass {
+	if char >= 'a' && char <= 'z' {
+		return charLower
+	} else if char >= 'A' && char <= 'Z' {
+		return charUpper
+	} else if char >= '0' && char <= '9' {
+		return charNumber
+	}
+	return charNonWord
+}
+
+func charClassOfNonAscii(char rune) charClass {
+	if unicode.IsLower(char) {
+		return charLower
+	} else if unicode.IsUpper(char) {
+		return charUpper
+	} else if unicode.IsNumber(char) {
+		return charNumber
+	} else if unicode.IsLetter(char) {
+		return charLetter
+	}
+	return charNonWord
+}
+
+func charClassOf(char rune) charClass {
+	if char <= unicode.MaxASCII {
+		return charClassOfAscii(char)
+	}
+	return charClassOfNonAscii(char)
+}
+
+func bonusFor(prevClass charClass, class charClass) int16 {
+	if prevClass == charNonWord && class != charNonWord {
+		// Word boundary
+		return bonusBoundary
+	} else if prevClass == charLower && class == charUpper ||
+		prevClass != charNumber && class == charNumber {
+		// camelCase letter123
+		return bonusCamel123
+	} else if class == charNonWord {
+		return bonusNonWord
+	}
+	return 0
+}
+
+func bonusAt(input util.Chars, idx int) int16 {
+	if idx == 0 {
+		return bonusBoundary
+	}
+	return bonusFor(charClassOf(input.Get(idx-1)), charClassOf(input.Get(idx)))
+}
+
+type Algo func(caseSensitive bool, forward bool, input util.Chars, pattern []rune, withPos bool, slab *util.Slab) (Result, *[]int)
+
+func FuzzyMatchV2(caseSensitive bool, forward bool, input util.Chars, pattern []rune, withPos bool, slab *util.Slab) (Result, *[]int) {
+	// Assume that pattern is given in lowercase if case-insensitive.
+	// First check if there's a match and calculate bonus for each position.
+	// If the input string is too long, consider finding the matching chars in
+	// this phase as well (non-optimal alignment).
+	N := input.Length()
+	M := len(pattern)
+	switch M {
+	case 0:
+		return Result{0, 0, 0}, posArray(withPos, M)
+	case 1:
+		return ExactMatchNaive(caseSensitive, forward, input, pattern[0:1], withPos, slab)
+	}
+
+	// Since O(nm) algorithm can be prohibitively expensive for large input,
+	// we fall back to the greedy algorithm.
+	if slab != nil && N*M > cap(slab.I16) {
+		return FuzzyMatchV1(caseSensitive, forward, input, pattern, withPos, slab)
+	}
+
+	// Reuse pre-allocated integer slice to avoid unnecessary sweeping of garbages
+	offset16 := 0
+	offset32 := 0
+	// Bonus point for each position
+	offset16, B := alloc16(offset16, slab, N, false)
+	// The first occurrence of each character in the pattern
+	offset32, F := alloc32(offset32, slab, M, false)
+	// Rune array
+	offset32, T := alloc32(offset32, slab, N, false)
+
+	// Phase 1. Check if there's a match and calculate bonus for each point
+	pidx, lastIdx, prevClass := 0, 0, charNonWord
+	for idx := 0; idx < N; idx++ {
+		char := input.Get(idx)
+		var class charClass
+		if char <= unicode.MaxASCII {
+			class = charClassOfAscii(char)
+		} else {
+			class = charClassOfNonAscii(char)
+		}
+
+		if !caseSensitive && class == charUpper {
+			if char <= unicode.MaxASCII {
+				char += 32
+			} else {
+				char = unicode.To(unicode.LowerCase, char)
+			}
+		}
+
+		T[idx] = char
+		B[idx] = bonusFor(prevClass, class)
+		prevClass = class
+
+		if pidx < M {
+			if char == pattern[pidx] {
+				lastIdx = idx
+				F[pidx] = int32(idx)
+				pidx++
+			}
+		} else {
+			if char == pattern[M-1] {
+				lastIdx = idx
+			}
+		}
+	}
+	if pidx != M {
+		return Result{-1, -1, 0}, nil
+	}
+
+	// Phase 2. Fill in score matrix (H)
+	// Unlike the original algorithm, we do not allow omission.
+	width := lastIdx - int(F[0]) + 1
+	offset16, H := alloc16(offset16, slab, width*M, false)
+
+	// Possible length of consecutive chunk at each position.
+	offset16, C := alloc16(offset16, slab, width*M, false)
+
+	maxScore, maxScorePos := int16(0), 0
+	for i := 0; i < M; i++ {
+		I := i * width
+		inGap := false
+		for j := int(F[i]); j <= lastIdx; j++ {
+			j0 := j - int(F[0])
+			var s1, s2, consecutive int16
+
+			if j > int(F[i]) {
+				if inGap {
+					s2 = H[I+j0-1] + scoreGapExtention
+				} else {
+					s2 = H[I+j0-1] + scoreGapStart
+				}
+			}
+
+			if pattern[i] == T[j] {
+				var diag int16
+				if i > 0 && j0 > 0 {
+					diag = H[I-width+j0-1]
+				}
+				s1 = diag + scoreMatch
+				b := B[j]
+				if i > 0 {
+					// j > 0 if i > 0
+					consecutive = C[I-width+j0-1] + 1
+					// Break consecutive chunk
+					if b == bonusBoundary {
+						consecutive = 1
+					} else if consecutive > 1 {
+						b = util.Max16(b, util.Max16(bonusConsecutive, B[j-int(consecutive)+1]))
+					}
+				} else {
+					consecutive = 1
+					b *= bonusFirstCharMultiplier
+				}
+				if s1+b < s2 {
+					s1 += B[j]
+					consecutive = 0
+				} else {
+					s1 += b
+				}
+			}
+			C[I+j0] = consecutive
+
+			inGap = s1 < s2
+			score := util.Max16(util.Max16(s1, s2), 0)
+			if i == M-1 && (forward && score > maxScore || !forward && score >= maxScore) {
+				maxScore, maxScorePos = score, j
+			}
+			H[I+j0] = score
+		}
+
+		if DEBUG {
+			if i == 0 {
+				fmt.Print("  ")
+				for j := int(F[i]); j <= lastIdx; j++ {
+					fmt.Printf(" " + string(input.Get(j)) + " ")
+				}
+				fmt.Println()
+			}
+			fmt.Print(string(pattern[i]) + " ")
+			for idx := int(F[0]); idx < int(F[i]); idx++ {
+				fmt.Print(" 0 ")
+			}
+			for idx := int(F[i]); idx <= lastIdx; idx++ {
+				fmt.Printf("%2d ", H[i*width+idx-int(F[0])])
+			}
+			fmt.Println()
+
+			fmt.Print("  ")
+			for idx, p := range C[I : I+width] {
+				if idx+int(F[0]) < int(F[i]) {
+					p = 0
+				}
+				fmt.Printf("%2d ", p)
+			}
+			fmt.Println()
+		}
+	}
+
+	// Phase 3. (Optional) Backtrace to find character positions
+	pos := posArray(withPos, M)
+	j := int(F[0])
+	if withPos {
+		i := M - 1
+		j = maxScorePos
+		preferMatch := true
+		for {
+			I := i * width
+			j0 := j - int(F[0])
+			s := H[I+j0]
+
+			var s1, s2 int16
+			if i > 0 && j >= int(F[i]) {
+				s1 = H[I-width+j0-1]
+			}
+			if j > int(F[i]) {
+				s2 = H[I+j0-1]
+			}
+
+			if s > s1 && (s > s2 || s == s2 && preferMatch) {
+				*pos = append(*pos, j)
+				if i == 0 {
+					break
+				}
+				i--
+			}
+			preferMatch = C[I+j0] > 1 || I+width+j0+1 < len(C) && C[I+width+j0+1] > 0
+			j--
+		}
+	}
+	// Start offset we return here is only relevant when begin tiebreak is used.
+	// However finding the accurate offset requires backtracking, and we don't
+	// want to pay extra cost for the option that has lost its importance.
+	return Result{j, maxScorePos + 1, int(maxScore)}, pos
+}
+
+// Implement the same sorting criteria as V2
+func calculateScore(caseSensitive bool, text util.Chars, pattern []rune, sidx int, eidx int, withPos bool) (int, *[]int) {
+	pidx, score, inGap, consecutive, firstBonus := 0, 0, false, 0, int16(0)
+	pos := posArray(withPos, len(pattern))
+	prevClass := charNonWord
+	if sidx > 0 {
+		prevClass = charClassOf(text.Get(sidx - 1))
+	}
+	for idx := sidx; idx < eidx; idx++ {
+		char := text.Get(idx)
+		class := charClassOf(char)
+		if !caseSensitive {
+			if char >= 'A' && char <= 'Z' {
+				char += 32
+			} else if char > unicode.MaxASCII {
+				char = unicode.To(unicode.LowerCase, char)
+			}
+		}
+		if char == pattern[pidx] {
+			if withPos {
+				*pos = append(*pos, idx)
+			}
+			score += scoreMatch
+			bonus := bonusFor(prevClass, class)
+			if consecutive == 0 {
+				firstBonus = bonus
+			} else {
+				// Break consecutive chunk
+				if bonus == bonusBoundary {
+					firstBonus = bonus
+				}
+				bonus = util.Max16(util.Max16(bonus, firstBonus), bonusConsecutive)
+			}
+			if pidx == 0 {
+				score += int(bonus * bonusFirstCharMultiplier)
+			} else {
+				score += int(bonus)
+			}
+			inGap = false
+			consecutive++
+			pidx++
+		} else {
+			if inGap {
+				score += scoreGapExtention
+			} else {
+				score += scoreGapStart
+			}
+			inGap = true
+			consecutive = 0
+			firstBonus = 0
+		}
+		prevClass = class
+	}
+	return score, pos
+}
+
+// FuzzyMatchV1 performs fuzzy-match
+func FuzzyMatchV1(caseSensitive bool, forward bool, text util.Chars, pattern []rune, withPos bool, slab *util.Slab) (Result, *[]int) {
+	if len(pattern) == 0 {
+		return Result{0, 0, 0}, nil
 	}
 
-	// 0. (FIXME) How to find the shortest match?
-	//    a_____b__c__abc
-	//    ^^^^^^^^^^  ^^^
-	// 1. forward scan (abc)
-	//   *-----*-----*>
-	//   a_____b___abc__
-	// 2. reverse scan (cba)
-	//   a_____b___abc__
-	//            <***
 	pidx := 0
 	sidx := -1
 	eidx := -1
 
-	lenRunes := len(runes)
+	lenRunes := text.Length()
 	lenPattern := len(pattern)
 
-	for index := range runes {
-		char := runeAt(runes, index, lenRunes, forward)
+	for index := 0; index < lenRunes; index++ {
+		char := text.Get(indexAt(index, lenRunes, forward))
 		// This is considerably faster than blindly applying strings.ToLower to the
 		// whole string
 		if !caseSensitive {
@@ -58,7 +514,7 @@ func FuzzyMatch(caseSensitive bool, forward bool, runes []rune, pattern []rune)
 				char = unicode.To(unicode.LowerCase, char)
 			}
 		}
-		pchar := runeAt(pattern, pidx, lenPattern, forward)
+		pchar := pattern[indexAt(pidx, lenPattern, forward)]
 		if char == pchar {
 			if sidx < 0 {
 				sidx = index
@@ -73,7 +529,8 @@ func FuzzyMatch(caseSensitive bool, forward bool, runes []rune, pattern []rune)
 	if sidx >= 0 && eidx >= 0 {
 		pidx--
 		for index := eidx - 1; index >= sidx; index-- {
-			char := runeAt(runes, index, lenRunes, forward)
+			tidx := indexAt(index, lenRunes, forward)
+			char := text.Get(tidx)
 			if !caseSensitive {
 				if char >= 'A' && char <= 'Z' {
 					char += 32
@@ -82,7 +539,8 @@ func FuzzyMatch(caseSensitive bool, forward bool, runes []rune, pattern []rune)
 				}
 			}
 
-			pchar := runeAt(pattern, pidx, lenPattern, forward)
+			pidx_ := indexAt(pidx, lenPattern, forward)
+			pchar := pattern[pidx_]
 			if char == pchar {
 				if pidx--; pidx < 0 {
 					sidx = index
@@ -90,12 +548,15 @@ func FuzzyMatch(caseSensitive bool, forward bool, runes []rune, pattern []rune)
 				}
 			}
 		}
-		if forward {
-			return sidx, eidx
+
+		if !forward {
+			sidx, eidx = lenRunes-eidx, lenRunes-sidx
 		}
-		return lenRunes - eidx, lenRunes - sidx
+
+		score, pos := calculateScore(caseSensitive, text, pattern, sidx, eidx, withPos)
+		return Result{sidx, eidx, score}, pos
 	}
-	return -1, -1
+	return Result{-1, -1, 0}, nil
 }
 
 // ExactMatchNaive is a basic string searching algorithm that handles case
@@ -103,23 +564,28 @@ func FuzzyMatch(caseSensitive bool, forward bool, runes []rune, pattern []rune)
 // of strings.ToLower + strings.Index for typical fzf use cases where input
 // strings and patterns are not very long.
 //
-// We might try to implement better algorithms in the future:
-// http://en.wikipedia.org/wiki/String_searching_algorithm
-func ExactMatchNaive(caseSensitive bool, forward bool, runes []rune, pattern []rune) (int, int) {
+// Since 0.15.0, this function searches for the match with the highest
+// bonus point, instead of stopping immediately after finding the first match.
+// The solution is much cheaper since there is only one possible alignment of
+// the pattern.
+func ExactMatchNaive(caseSensitive bool, forward bool, text util.Chars, pattern []rune, withPos bool, slab *util.Slab) (Result, *[]int) {
 	if len(pattern) == 0 {
-		return 0, 0
+		return Result{0, 0, 0}, nil
 	}
 
-	lenRunes := len(runes)
+	lenRunes := text.Length()
 	lenPattern := len(pattern)
 
 	if lenRunes < lenPattern {
-		return -1, -1
+		return Result{-1, -1, 0}, nil
 	}
 
+	// For simplicity, only look at the bonus at the first character position
 	pidx := 0
+	bestPos, bonus, bestBonus := -1, int16(0), int16(-1)
 	for index := 0; index < lenRunes; index++ {
-		char := runeAt(runes, index, lenRunes, forward)
+		index_ := indexAt(index, lenRunes, forward)
+		char := text.Get(index_)
 		if !caseSensitive {
 			if char >= 'A' && char <= 'Z' {
 				char += 32
@@ -127,73 +593,108 @@ func ExactMatchNaive(caseSensitive bool, forward bool, runes []rune, pattern []r
 				char = unicode.To(unicode.LowerCase, char)
 			}
 		}
-		pchar := runeAt(pattern, pidx, lenPattern, forward)
+		pidx_ := indexAt(pidx, lenPattern, forward)
+		pchar := pattern[pidx_]
 		if pchar == char {
+			if pidx_ == 0 {
+				bonus = bonusAt(text, index_)
+			}
 			pidx++
 			if pidx == lenPattern {
-				if forward {
-					return index - lenPattern + 1, index + 1
+				if bonus > bestBonus {
+					bestPos, bestBonus = index, bonus
 				}
-				return lenRunes - (index + 1), lenRunes - (index - lenPattern + 1)
+				if bonus == bonusBoundary {
+					break
+				}
+				index -= pidx - 1
+				pidx, bonus = 0, 0
 			}
 		} else {
 			index -= pidx
-			pidx = 0
+			pidx, bonus = 0, 0
 		}
 	}
-	return -1, -1
+	if bestPos >= 0 {
+		var sidx, eidx int
+		if forward {
+			sidx = bestPos - lenPattern + 1
+			eidx = bestPos + 1
+		} else {
+			sidx = lenRunes - (bestPos + 1)
+			eidx = lenRunes - (bestPos - lenPattern + 1)
+		}
+		score, _ := calculateScore(caseSensitive, text, pattern, sidx, eidx, false)
+		return Result{sidx, eidx, score}, nil
+	}
+	return Result{-1, -1, 0}, nil
 }
 
 // PrefixMatch performs prefix-match
-func PrefixMatch(caseSensitive bool, forward bool, runes []rune, pattern []rune) (int, int) {
-	if len(runes) < len(pattern) {
-		return -1, -1
+func PrefixMatch(caseSensitive bool, forward bool, text util.Chars, pattern []rune, withPos bool, slab *util.Slab) (Result, *[]int) {
+	if len(pattern) == 0 {
+		return Result{0, 0, 0}, nil
+	}
+
+	if text.Length() < len(pattern) {
+		return Result{-1, -1, 0}, nil
 	}
 
 	for index, r := range pattern {
-		char := runes[index]
+		char := text.Get(index)
 		if !caseSensitive {
 			char = unicode.ToLower(char)
 		}
 		if char != r {
-			return -1, -1
+			return Result{-1, -1, 0}, nil
 		}
 	}
-	return 0, len(pattern)
+	lenPattern := len(pattern)
+	score, _ := calculateScore(caseSensitive, text, pattern, 0, lenPattern, false)
+	return Result{0, lenPattern, score}, nil
 }
 
 // SuffixMatch performs suffix-match
-func SuffixMatch(caseSensitive bool, forward bool, input []rune, pattern []rune) (int, int) {
-	runes := util.TrimRight(input)
-	trimmedLen := len(runes)
+func SuffixMatch(caseSensitive bool, forward bool, text util.Chars, pattern []rune, withPos bool, slab *util.Slab) (Result, *[]int) {
+	lenRunes := text.Length()
+	trimmedLen := lenRunes - text.TrailingWhitespaces()
+	if len(pattern) == 0 {
+		return Result{trimmedLen, trimmedLen, 0}, nil
+	}
 	diff := trimmedLen - len(pattern)
 	if diff < 0 {
-		return -1, -1
+		return Result{-1, -1, 0}, nil
 	}
 
 	for index, r := range pattern {
-		char := runes[index+diff]
+		char := text.Get(index + diff)
 		if !caseSensitive {
 			char = unicode.ToLower(char)
 		}
 		if char != r {
-			return -1, -1
+			return Result{-1, -1, 0}, nil
 		}
 	}
-	return trimmedLen - len(pattern), trimmedLen
+	lenPattern := len(pattern)
+	sidx := trimmedLen - lenPattern
+	eidx := trimmedLen
+	score, _ := calculateScore(caseSensitive, text, pattern, sidx, eidx, false)
+	return Result{sidx, eidx, score}, nil
 }
 
 // EqualMatch performs equal-match
-func EqualMatch(caseSensitive bool, forward bool, runes []rune, pattern []rune) (int, int) {
-	if len(runes) != len(pattern) {
-		return -1, -1
+func EqualMatch(caseSensitive bool, forward bool, text util.Chars, pattern []rune, withPos bool, slab *util.Slab) (Result, *[]int) {
+	lenPattern := len(pattern)
+	if text.Length() != lenPattern {
+		return Result{-1, -1, 0}, nil
 	}
-	runesStr := string(runes)
+	runesStr := text.ToString()
 	if !caseSensitive {
 		runesStr = strings.ToLower(runesStr)
 	}
 	if runesStr == string(pattern) {
-		return 0, len(pattern)
+		return Result{0, lenPattern, (scoreMatch+bonusBoundary)*lenPattern +
+			(bonusFirstCharMultiplier-1)*bonusBoundary}, nil
 	}
-	return -1, -1
+	return Result{-1, -1, 0}, nil
 }

src/algo/algo_test.go

@@ -1,69 +1,166 @@
 package algo
 
 import (
+	"math"
+	"sort"
 	"strings"
 	"testing"
+
+	"github.com/junegunn/fzf/src/util"
 )
 
-func assertMatch(t *testing.T, fun func(bool, bool, []rune, []rune) (int, int), caseSensitive bool, forward bool, input string, pattern string, sidx int, eidx int) {
+func assertMatch(t *testing.T, fun Algo, caseSensitive, forward bool, input, pattern string, sidx int, eidx int, score int) {
 	if !caseSensitive {
 		pattern = strings.ToLower(pattern)
 	}
-	s, e := fun(caseSensitive, forward, []rune(input), []rune(pattern))
-	if s != sidx {
-		t.Errorf("Invalid start index: %d (expected: %d, %s / %s)", s, sidx, input, pattern)
+	res, pos := fun(caseSensitive, forward, util.RunesToChars([]rune(input)), []rune(pattern), true, nil)
+	var start, end int
+	if pos == nil || len(*pos) == 0 {
+		start = res.Start
+		end = res.End
+	} else {
+		sort.Ints(*pos)
+		start = (*pos)[0]
+		end = (*pos)[len(*pos)-1] + 1
 	}
-	if e != eidx {
-		t.Errorf("Invalid end index: %d (expected: %d, %s / %s)", e, eidx, input, pattern)
+	if start != sidx {
+		t.Errorf("Invalid start index: %d (expected: %d, %s / %s)", start, sidx, input, pattern)
+	}
+	if end != eidx {
+		t.Errorf("Invalid end index: %d (expected: %d, %s / %s)", end, eidx, input, pattern)
+	}
+	if res.Score != score {
+		t.Errorf("Invalid score: %d (expected: %d, %s / %s)", res.Score, score, input, pattern)
 	}
 }
 
 func TestFuzzyMatch(t *testing.T) {
-	assertMatch(t, FuzzyMatch, false, true, "fooBarbaz", "oBZ", 2, 9)
-	assertMatch(t, FuzzyMatch, true, true, "fooBarbaz", "oBZ", -1, -1)
-	assertMatch(t, FuzzyMatch, true, true, "fooBarbaz", "oBz", 2, 9)
-	assertMatch(t, FuzzyMatch, true, true, "fooBarbaz", "fooBarbazz", -1, -1)
+	for _, fn := range []Algo{FuzzyMatchV1, FuzzyMatchV2} {
+		for _, forward := range []bool{true, false} {
+			assertMatch(t, fn, false, forward, "fooBarbaz1", "oBZ", 2, 9,
+				scoreMatch*3+bonusCamel123+scoreGapStart+scoreGapExtention*3)
+			assertMatch(t, fn, false, forward, "foo bar baz", "fbb", 0, 9,
+				scoreMatch*3+bonusBoundary*bonusFirstCharMultiplier+
+					bonusBoundary*2+2*scoreGapStart+4*scoreGapExtention)
+			assertMatch(t, fn, false, forward, "/AutomatorDocument.icns", "rdoc", 9, 13,
+				scoreMatch*4+bonusCamel123+bonusConsecutive*2)
+			assertMatch(t, fn, false, forward, "/man1/zshcompctl.1", "zshc", 6, 10,
+				scoreMatch*4+bonusBoundary*bonusFirstCharMultiplier+bonusBoundary*3)
+			assertMatch(t, fn, false, forward, "/.oh-my-zsh/cache", "zshc", 8, 13,
+				scoreMatch*4+bonusBoundary*bonusFirstCharMultiplier+bonusBoundary*3+scoreGapStart)
+			assertMatch(t, fn, false, forward, "ab0123 456", "12356", 3, 10,
+				scoreMatch*5+bonusConsecutive*3+scoreGapStart+scoreGapExtention)
+			assertMatch(t, fn, false, forward, "abc123 456", "12356", 3, 10,
+				scoreMatch*5+bonusCamel123*bonusFirstCharMultiplier+bonusCamel123*2+bonusConsecutive+scoreGapStart+scoreGapExtention)
+			assertMatch(t, fn, false, forward, "foo/bar/baz", "fbb", 0, 9,
+				scoreMatch*3+bonusBoundary*bonusFirstCharMultiplier+
+					bonusBoundary*2+2*scoreGapStart+4*scoreGapExtention)
+			assertMatch(t, fn, false, forward, "fooBarBaz", "fbb", 0, 7,
+				scoreMatch*3+bonusBoundary*bonusFirstCharMultiplier+
+					bonusCamel123*2+2*scoreGapStart+2*scoreGapExtention)
+			assertMatch(t, fn, false, forward, "foo barbaz", "fbb", 0, 8,
+				scoreMatch*3+bonusBoundary*bonusFirstCharMultiplier+bonusBoundary+
+					scoreGapStart*2+scoreGapExtention*3)
+			assertMatch(t, fn, false, forward, "fooBar Baz", "foob", 0, 4,
+				scoreMatch*4+bonusBoundary*bonusFirstCharMultiplier+bonusBoundary*3)
+			assertMatch(t, fn, false, forward, "xFoo-Bar Baz", "foo-b", 1, 6,
+				scoreMatch*5+bonusCamel123*bonusFirstCharMultiplier+bonusCamel123*2+
+					bonusNonWord+bonusBoundary)
+
+			assertMatch(t, fn, true, forward, "fooBarbaz", "oBz", 2, 9,
+				scoreMatch*3+bonusCamel123+scoreGapStart+scoreGapExtention*3)
+			assertMatch(t, fn, true, forward, "Foo/Bar/Baz", "FBB", 0, 9,
+				scoreMatch*3+bonusBoundary*(bonusFirstCharMultiplier+2)+
+					scoreGapStart*2+scoreGapExtention*4)
+			assertMatch(t, fn, true, forward, "FooBarBaz", "FBB", 0, 7,
+				scoreMatch*3+bonusBoundary*bonusFirstCharMultiplier+bonusCamel123*2+
+					scoreGapStart*2+scoreGapExtention*2)
+			assertMatch(t, fn, true, forward, "FooBar Baz", "FooB", 0, 4,
+				scoreMatch*4+bonusBoundary*bonusFirstCharMultiplier+bonusBoundary*2+
+					util.Max(bonusCamel123, bonusBoundary))
+
+			// Consecutive bonus updated
+			assertMatch(t, fn, true, forward, "foo-bar", "o-ba", 2, 6,
+				scoreMatch*4+bonusBoundary*3)
+
+			// Non-match
+			assertMatch(t, fn, true, forward, "fooBarbaz", "oBZ", -1, -1, 0)
+			assertMatch(t, fn, true, forward, "Foo Bar Baz", "fbb", -1, -1, 0)
+			assertMatch(t, fn, true, forward, "fooBarbaz", "fooBarbazz", -1, -1, 0)
+		}
+	}
 }
 
 func TestFuzzyMatchBackward(t *testing.T) {
-	assertMatch(t, FuzzyMatch, false, true, "foobar fb", "fb", 0, 4)
-	assertMatch(t, FuzzyMatch, false, false, "foobar fb", "fb", 7, 9)
+	assertMatch(t, FuzzyMatchV1, false, true, "foobar fb", "fb", 0, 4,
+		scoreMatch*2+bonusBoundary*bonusFirstCharMultiplier+
+			scoreGapStart+scoreGapExtention)
+	assertMatch(t, FuzzyMatchV1, false, false, "foobar fb", "fb", 7, 9,
+		scoreMatch*2+bonusBoundary*bonusFirstCharMultiplier+bonusBoundary)
 }
 
 func TestExactMatchNaive(t *testing.T) {
 	for _, dir := range []bool{true, false} {
-		assertMatch(t, ExactMatchNaive, false, dir, "fooBarbaz", "oBA", 2, 5)
-		assertMatch(t, ExactMatchNaive, true, dir, "fooBarbaz", "oBA", -1, -1)
-		assertMatch(t, ExactMatchNaive, true, dir, "fooBarbaz", "fooBarbazz", -1, -1)
+		assertMatch(t, ExactMatchNaive, true, dir, "fooBarbaz", "oBA", -1, -1, 0)
+		assertMatch(t, ExactMatchNaive, true, dir, "fooBarbaz", "fooBarbazz", -1, -1, 0)
+
+		assertMatch(t, ExactMatchNaive, false, dir, "fooBarbaz", "oBA", 2, 5,
+			scoreMatch*3+bonusCamel123+bonusConsecutive)
+		assertMatch(t, ExactMatchNaive, false, dir, "/AutomatorDocument.icns", "rdoc", 9, 13,
+			scoreMatch*4+bonusCamel123+bonusConsecutive*2)
+		assertMatch(t, ExactMatchNaive, false, dir, "/man1/zshcompctl.1", "zshc", 6, 10,
+			scoreMatch*4+bonusBoundary*(bonusFirstCharMultiplier+3))
+		assertMatch(t, ExactMatchNaive, false, dir, "/.oh-my-zsh/cache", "zsh/c", 8, 13,
+			scoreMatch*5+bonusBoundary*(bonusFirstCharMultiplier+4))
 	}
 }
 
 func TestExactMatchNaiveBackward(t *testing.T) {
-	assertMatch(t, FuzzyMatch, false, true, "foobar foob", "oo", 1, 3)
-	assertMatch(t, FuzzyMatch, false, false, "foobar foob", "oo", 8, 10)
+	assertMatch(t, ExactMatchNaive, false, true, "foobar foob", "oo", 1, 3,
+		scoreMatch*2+bonusConsecutive)
+	assertMatch(t, ExactMatchNaive, false, false, "foobar foob", "oo", 8, 10,
+		scoreMatch*2+bonusConsecutive)
 }
 
 func TestPrefixMatch(t *testing.T) {
+	score := (scoreMatch+bonusBoundary)*3 + bonusBoundary*(bonusFirstCharMultiplier-1)
+
 	for _, dir := range []bool{true, false} {
-		assertMatch(t, PrefixMatch, false, dir, "fooBarbaz", "Foo", 0, 3)
-		assertMatch(t, PrefixMatch, true, dir, "fooBarbaz", "Foo", -1, -1)
-		assertMatch(t, PrefixMatch, false, dir, "fooBarbaz", "baz", -1, -1)
+		assertMatch(t, PrefixMatch, true, dir, "fooBarbaz", "Foo", -1, -1, 0)
+		assertMatch(t, PrefixMatch, false, dir, "fooBarBaz", "baz", -1, -1, 0)
+		assertMatch(t, PrefixMatch, false, dir, "fooBarbaz", "Foo", 0, 3, score)
+		assertMatch(t, PrefixMatch, false, dir, "foOBarBaZ", "foo", 0, 3, score)
+		assertMatch(t, PrefixMatch, false, dir, "f-oBarbaz", "f-o", 0, 3, score)
 	}
 }
 
 func TestSuffixMatch(t *testing.T) {
 	for _, dir := range []bool{true, false} {
-		assertMatch(t, SuffixMatch, false, dir, "fooBarbaz", "Foo", -1, -1)
-		assertMatch(t, SuffixMatch, false, dir, "fooBarbaz", "baz", 6, 9)
-		assertMatch(t, SuffixMatch, true, dir, "fooBarbaz", "Baz", -1, -1)
+		assertMatch(t, SuffixMatch, true, dir, "fooBarbaz", "Baz", -1, -1, 0)
+		assertMatch(t, SuffixMatch, false, dir, "fooBarbaz", "Foo", -1, -1, 0)
+
+		assertMatch(t, SuffixMatch, false, dir, "fooBarbaz", "baz", 6, 9,
+			scoreMatch*3+bonusConsecutive*2)
+		assertMatch(t, SuffixMatch, false, dir, "fooBarBaZ", "baz", 6, 9,
+			(scoreMatch+bonusCamel123)*3+bonusCamel123*(bonusFirstCharMultiplier-1))
 	}
 }
 
 func TestEmptyPattern(t *testing.T) {
 	for _, dir := range []bool{true, false} {
-		assertMatch(t, FuzzyMatch, true, dir, "foobar", "", 0, 0)
-		assertMatch(t, ExactMatchNaive, true, dir, "foobar", "", 0, 0)
-		assertMatch(t, PrefixMatch, true, dir, "foobar", "", 0, 0)
-		assertMatch(t, SuffixMatch, true, dir, "foobar", "", 6, 6)
+		assertMatch(t, FuzzyMatchV1, true, dir, "foobar", "", 0, 0, 0)
+		assertMatch(t, FuzzyMatchV2, true, dir, "foobar", "", 0, 0, 0)
+		assertMatch(t, ExactMatchNaive, true, dir, "foobar", "", 0, 0, 0)
+		assertMatch(t, PrefixMatch, true, dir, "foobar", "", 0, 0, 0)
+		assertMatch(t, SuffixMatch, true, dir, "foobar", "", 6, 6, 0)
 	}
 }
+
+func TestLongString(t *testing.T) {
+	bytes := make([]byte, math.MaxUint16*2)
+	for i := range bytes {
+		bytes[i] = 'x'
+	}
+	bytes[math.MaxUint16] = 'z'
+	assertMatch(t, FuzzyMatchV2, true, true, string(bytes), "zx", math.MaxUint16, math.MaxUint16+2, scoreMatch*2+bonusConsecutive)
+}

src/ansi.go

@@ -6,6 +6,8 @@ import (
 	"strconv"
 	"strings"
 	"unicode/utf8"
+
+	"github.com/junegunn/fzf/src/curses"
 )
 
 type ansiOffset struct {
@@ -16,27 +18,27 @@ type ansiOffset struct {
 type ansiState struct {
 	fg   int
 	bg   int
-	bold bool
+	attr curses.Attr
 }
 
 func (s *ansiState) colored() bool {
-	return s.fg != -1 || s.bg != -1 || s.bold
+	return s.fg != -1 || s.bg != -1 || s.attr > 0
 }
 
 func (s *ansiState) equals(t *ansiState) bool {
 	if t == nil {
 		return !s.colored()
 	}
-	return s.fg == t.fg && s.bg == t.bg && s.bold == t.bold
+	return s.fg == t.fg && s.bg == t.bg && s.attr == t.attr
 }
 
 var ansiRegex *regexp.Regexp
 
 func init() {
-	ansiRegex = regexp.MustCompile("\x1b\\[[0-9;]*[mK]")
+	ansiRegex = regexp.MustCompile("\x1b.[0-9;]*.")
 }
 
-func extractColor(str string, state *ansiState) (string, []ansiOffset, *ansiState) {
+func extractColor(str string, state *ansiState, proc func(string, *ansiState) bool) (string, *[]ansiOffset, *ansiState) {
 	var offsets []ansiOffset
 	var output bytes.Buffer
 
@@ -46,7 +48,11 @@ func extractColor(str string, state *ansiState) (string, []ansiOffset, *ansiStat
 
 	idx := 0
 	for _, offset := range ansiRegex.FindAllStringIndex(str, -1) {
-		output.WriteString(str[idx:offset[0]])
+		prev := str[idx:offset[0]]
+		output.WriteString(prev)
+		if proc != nil && !proc(prev, state) {
+			return "", nil, nil
+		}
 		newState := interpretCode(str[offset[0]:offset[1]], state)
 
 		if !newState.equals(state) {
@@ -77,18 +83,24 @@ func extractColor(str string, state *ansiState) (string, []ansiOffset, *ansiStat
 			(&offsets[len(offsets)-1]).offset[1] = int32(utf8.RuneCount(output.Bytes()))
 		}
 	}
-	return output.String(), offsets, state
+	if proc != nil {
+		proc(rest, state)
+	}
+	if len(offsets) == 0 {
+		return output.String(), nil, state
+	}
+	return output.String(), &offsets, state
 }
 
 func interpretCode(ansiCode string, prevState *ansiState) *ansiState {
 	// State
 	var state *ansiState
 	if prevState == nil {
-		state = &ansiState{-1, -1, false}
+		state = &ansiState{-1, -1, 0}
 	} else {
-		state = &ansiState{prevState.fg, prevState.bg, prevState.bold}
+		state = &ansiState{prevState.fg, prevState.bg, prevState.attr}
 	}
-	if ansiCode[len(ansiCode)-1] == 'K' {
+	if ansiCode[1] != '[' || ansiCode[len(ansiCode)-1] != 'm' {
 		return state
 	}
 
@@ -98,7 +110,7 @@ func interpretCode(ansiCode string, prevState *ansiState) *ansiState {
 	init := func() {
 		state.fg = -1
 		state.bg = -1
-		state.bold = false
+		state.attr = 0
 		state256 = 0
 	}
 
@@ -122,7 +134,15 @@ func interpretCode(ansiCode string, prevState *ansiState) *ansiState {
 				case 49:
 					state.bg = -1
 				case 1:
-					state.bold = true
+					state.attr = curses.Bold
+				case 2:
+					state.attr = curses.Dim
+				case 4:
+					state.attr = curses.Underline
+				case 5:
+					state.attr = curses.Blink
+				case 7:
+					state.attr = curses.Reverse
 				case 0:
 					init()
 				default:
@@ -130,6 +150,10 @@ func interpretCode(ansiCode string, prevState *ansiState) *ansiState {
 						state.fg = num - 30
 					} else if num >= 40 && num <= 47 {
 						state.bg = num - 40
+					} else if num >= 90 && num <= 97 {
+						state.fg = num - 90 + 8
+					} else if num >= 100 && num <= 107 {
+						state.bg = num - 100 + 8
 					}
 				}
 			case 1:

src/ansi_test.go

@@ -3,21 +3,27 @@ package fzf
 import (
 	"fmt"
 	"testing"
+
+	"github.com/junegunn/fzf/src/curses"
 )
 
 func TestExtractColor(t *testing.T) {
 	assert := func(offset ansiOffset, b int32, e int32, fg int, bg int, bold bool) {
+		var attr curses.Attr
+		if bold {
+			attr = curses.Bold
+		}
 		if offset.offset[0] != b || offset.offset[1] != e ||
-			offset.color.fg != fg || offset.color.bg != bg || offset.color.bold != bold {
-			t.Error(offset, b, e, fg, bg, bold)
+			offset.color.fg != fg || offset.color.bg != bg || offset.color.attr != attr {
+			t.Error(offset, b, e, fg, bg, attr)
 		}
 	}
 
 	src := "hello world"
 	var state *ansiState
 	clean := "\x1b[0m"
-	check := func(assertion func(ansiOffsets []ansiOffset, state *ansiState)) {
-		output, ansiOffsets, newState := extractColor(src, state)
+	check := func(assertion func(ansiOffsets *[]ansiOffset, state *ansiState)) {
+		output, ansiOffsets, newState := extractColor(src, state, nil)
 		state = newState
 		if output != "hello world" {
 			t.Errorf("Invalid output: {}", output)
@@ -26,127 +32,127 @@ func TestExtractColor(t *testing.T) {
 		assertion(ansiOffsets, state)
 	}
 
-	check(func(offsets []ansiOffset, state *ansiState) {
-		if len(offsets) > 0 {
+	check(func(offsets *[]ansiOffset, state *ansiState) {
+		if offsets != nil {
 			t.Fail()
 		}
 	})
 
 	state = nil
 	src = "\x1b[0mhello world"
-	check(func(offsets []ansiOffset, state *ansiState) {
-		if len(offsets) > 0 {
+	check(func(offsets *[]ansiOffset, state *ansiState) {
+		if offsets != nil {
 			t.Fail()
 		}
 	})
 
 	state = nil
 	src = "\x1b[1mhello world"
-	check(func(offsets []ansiOffset, state *ansiState) {
-		if len(offsets) != 1 {
+	check(func(offsets *[]ansiOffset, state *ansiState) {
+		if len(*offsets) != 1 {
 			t.Fail()
 		}
-		assert(offsets[0], 0, 11, -1, -1, true)
+		assert((*offsets)[0], 0, 11, -1, -1, true)
 	})
 
 	state = nil
 	src = "\x1b[1mhello \x1b[mworld"
-	check(func(offsets []ansiOffset, state *ansiState) {
-		if len(offsets) != 1 {
+	check(func(offsets *[]ansiOffset, state *ansiState) {
+		if len(*offsets) != 1 {
 			t.Fail()
 		}
-		assert(offsets[0], 0, 6, -1, -1, true)
+		assert((*offsets)[0], 0, 6, -1, -1, true)
 	})
 
 	state = nil
 	src = "\x1b[1mhello \x1b[Kworld"
-	check(func(offsets []ansiOffset, state *ansiState) {
-		if len(offsets) != 1 {
+	check(func(offsets *[]ansiOffset, state *ansiState) {
+		if len(*offsets) != 1 {
 			t.Fail()
 		}
-		assert(offsets[0], 0, 11, -1, -1, true)
+		assert((*offsets)[0], 0, 11, -1, -1, true)
 	})
 
 	state = nil
 	src = "hello \x1b[34;45;1mworld"
-	check(func(offsets []ansiOffset, state *ansiState) {
-		if len(offsets) != 1 {
+	check(func(offsets *[]ansiOffset, state *ansiState) {
+		if len(*offsets) != 1 {
 			t.Fail()
 		}
-		assert(offsets[0], 6, 11, 4, 5, true)
+		assert((*offsets)[0], 6, 11, 4, 5, true)
 	})
 
 	state = nil
 	src = "hello \x1b[34;45;1mwor\x1b[34;45;1mld"
-	check(func(offsets []ansiOffset, state *ansiState) {
-		if len(offsets) != 1 {
+	check(func(offsets *[]ansiOffset, state *ansiState) {
+		if len(*offsets) != 1 {
 			t.Fail()
 		}
-		assert(offsets[0], 6, 11, 4, 5, true)
+		assert((*offsets)[0], 6, 11, 4, 5, true)
 	})
 
 	state = nil
 	src = "hello \x1b[34;45;1mwor\x1b[0mld"
-	check(func(offsets []ansiOffset, state *ansiState) {
-		if len(offsets) != 1 {
+	check(func(offsets *[]ansiOffset, state *ansiState) {
+		if len(*offsets) != 1 {
 			t.Fail()
 		}
-		assert(offsets[0], 6, 9, 4, 5, true)
+		assert((*offsets)[0], 6, 9, 4, 5, true)
 	})
 
 	state = nil
 	src = "hello \x1b[34;48;5;233;1mwo\x1b[38;5;161mr\x1b[0ml\x1b[38;5;161md"
-	check(func(offsets []ansiOffset, state *ansiState) {
-		if len(offsets) != 3 {
+	check(func(offsets *[]ansiOffset, state *ansiState) {
+		if len(*offsets) != 3 {
 			t.Fail()
 		}
-		assert(offsets[0], 6, 8, 4, 233, true)
-		assert(offsets[1], 8, 9, 161, 233, true)
-		assert(offsets[2], 10, 11, 161, -1, false)
+		assert((*offsets)[0], 6, 8, 4, 233, true)
+		assert((*offsets)[1], 8, 9, 161, 233, true)
+		assert((*offsets)[2], 10, 11, 161, -1, false)
 	})
 
 	// {38,48};5;{38,48}
 	state = nil
 	src = "hello \x1b[38;5;38;48;5;48;1mwor\x1b[38;5;48;48;5;38ml\x1b[0md"
-	check(func(offsets []ansiOffset, state *ansiState) {
-		if len(offsets) != 2 {
+	check(func(offsets *[]ansiOffset, state *ansiState) {
+		if len(*offsets) != 2 {
 			t.Fail()
 		}
-		assert(offsets[0], 6, 9, 38, 48, true)
-		assert(offsets[1], 9, 10, 48, 38, true)
+		assert((*offsets)[0], 6, 9, 38, 48, true)
+		assert((*offsets)[1], 9, 10, 48, 38, true)
 	})
 
 	src = "hello \x1b[32;1mworld"
-	check(func(offsets []ansiOffset, state *ansiState) {
-		if len(offsets) != 1 {
+	check(func(offsets *[]ansiOffset, state *ansiState) {
+		if len(*offsets) != 1 {
 			t.Fail()
 		}
-		if state.fg != 2 || state.bg != -1 || !state.bold {
+		if state.fg != 2 || state.bg != -1 || state.attr == 0 {
 			t.Fail()
 		}
-		assert(offsets[0], 6, 11, 2, -1, true)
+		assert((*offsets)[0], 6, 11, 2, -1, true)
 	})
 
 	src = "hello world"
-	check(func(offsets []ansiOffset, state *ansiState) {
-		if len(offsets) != 1 {
+	check(func(offsets *[]ansiOffset, state *ansiState) {
+		if len(*offsets) != 1 {
 			t.Fail()
 		}
-		if state.fg != 2 || state.bg != -1 || !state.bold {
+		if state.fg != 2 || state.bg != -1 || state.attr == 0 {
 			t.Fail()
 		}
-		assert(offsets[0], 0, 11, 2, -1, true)
+		assert((*offsets)[0], 0, 11, 2, -1, true)
 	})
 
 	src = "hello \x1b[0;38;5;200;48;5;100mworld"
-	check(func(offsets []ansiOffset, state *ansiState) {
-		if len(offsets) != 2 {
+	check(func(offsets *[]ansiOffset, state *ansiState) {
+		if len(*offsets) != 2 {
 			t.Fail()
 		}
-		if state.fg != 200 || state.bg != 100 || state.bold {
+		if state.fg != 200 || state.bg != 100 || state.attr > 0 {
 			t.Fail()
 		}
-		assert(offsets[0], 0, 6, 2, -1, true)
-		assert(offsets[1], 6, 11, 200, 100, false)
+		assert((*offsets)[0], 0, 6, 2, -1, true)
+		assert((*offsets)[1], 6, 11, 200, 100, false)
 	})
 }

src/cache.go

@@ -3,7 +3,7 @@ package fzf
 import "sync"
 
 // queryCache associates strings to lists of items
-type queryCache map[string][]*Item
+type queryCache map[string][]*Result
 
 // ChunkCache associates Chunk and query string to lists of items
 type ChunkCache struct {
@@ -17,7 +17,7 @@ func NewChunkCache() ChunkCache {
 }
 
 // Add adds the list to the cache
-func (cc *ChunkCache) Add(chunk *Chunk, key string, list []*Item) {
+func (cc *ChunkCache) Add(chunk *Chunk, key string, list []*Result) {
 	if len(key) == 0 || !chunk.IsFull() || len(list) > queryCacheMax {
 		return
 	}
@@ -34,7 +34,7 @@ func (cc *ChunkCache) Add(chunk *Chunk, key string, list []*Item) {
 }
 
 // Find is called to lookup ChunkCache
-func (cc *ChunkCache) Find(chunk *Chunk, key string) ([]*Item, bool) {
+func (cc *ChunkCache) Find(chunk *Chunk, key string) ([]*Result, bool) {
 	if len(key) == 0 || !chunk.IsFull() {
 		return nil, false
 	}

src/cache_test.go

@@ -7,8 +7,8 @@ func TestChunkCache(t *testing.T) {
 	chunk2 := make(Chunk, chunkSize)
 	chunk1p := &Chunk{}
 	chunk2p := &chunk2
-	items1 := []*Item{&Item{}}
-	items2 := []*Item{&Item{}, &Item{}}
+	items1 := []*Result{&Result{}}
+	items2 := []*Result{&Result{}, &Result{}}
 	cache.Add(chunk1p, "foo", items1)
 	cache.Add(chunk2p, "foo", items1)
 	cache.Add(chunk2p, "bar", items2)

src/chunklist_test.go

@@ -3,14 +3,16 @@ package fzf
 import (
 	"fmt"
 	"testing"
+
+	"github.com/junegunn/fzf/src/util"
 )
 
 func TestChunkList(t *testing.T) {
 	// FIXME global
-	sortCriteria = []criterion{byMatchLen, byLength}
+	sortCriteria = []criterion{byScore, byLength}
 
 	cl := NewChunkList(func(s []byte, i int) *Item {
-		return &Item{text: []rune(string(s)), rank: buildEmptyRank(int32(i * 2))}
+		return &Item{text: util.ToChars(s), index: int32(i * 2)}
 	})
 
 	// Snapshot
@@ -39,11 +41,8 @@ func TestChunkList(t *testing.T) {
 	if len(*chunk1) != 2 {
 		t.Error("Snapshot should contain only two items")
 	}
-	last := func(arr [5]int32) int32 {
-		return arr[len(arr)-1]
-	}
-	if string((*chunk1)[0].text) != "hello" || last((*chunk1)[0].rank) != 0 ||
-		string((*chunk1)[1].text) != "world" || last((*chunk1)[1].rank) != 2 {
+	if (*chunk1)[0].text.ToString() != "hello" || (*chunk1)[0].index != 0 ||
+		(*chunk1)[1].text.ToString() != "world" || (*chunk1)[1].index != 2 {
 		t.Error("Invalid data")
 	}
 	if chunk1.IsFull() {

src/constants.go

@@ -8,26 +8,34 @@ import (
 
 const (
 	// Current version
-	version = "0.11.4"
+	version = "0.15.4"
 
 	// Core
 	coordinatorDelayMax  time.Duration = 100 * time.Millisecond
 	coordinatorDelayStep time.Duration = 10 * time.Millisecond
 
 	// Reader
-	defaultCommand = `find . -path '*/\.*' -prune -o -type f -print -o -type l -print 2> /dev/null | sed s/^..//`
+	defaultCommand   = `find . -path '*/\.*' -prune -o -type f -print -o -type l -print 2> /dev/null | sed s/^..//`
+	readerBufferSize = 64 * 1024
 
 	// Terminal
-	initialDelay    = 20 * time.Millisecond
-	initialDelayTac = 100 * time.Millisecond
-	spinnerDuration = 200 * time.Millisecond
+	initialDelay     = 20 * time.Millisecond
+	initialDelayTac  = 100 * time.Millisecond
+	spinnerDuration  = 200 * time.Millisecond
+	maxPatternLength = 100
 
 	// Matcher
-	progressMinDuration = 200 * time.Millisecond
+	numPartitionsMultiplier = 8
+	maxPartitions           = 32
+	progressMinDuration     = 200 * time.Millisecond
 
 	// Capacity of each chunk
 	chunkSize int = 100
 
+	// Pre-allocated memory slices to minimize GC
+	slab16Size int = 100 * 1024 // 200KB * 32 = 12.8MB
+	slab32Size int = 2048       // 8KB * 32 = 256KB
+
 	// Do not cache results of low selectivity queries
 	queryCacheMax int = chunkSize / 5
 
@@ -36,6 +44,9 @@ const (
 
 	// History
 	defaultHistoryMax int = 1000
+
+	// Jump labels
+	defaultJumpLabels string = "asdfghjklqwertyuiopzxcvbnm1234567890ASDFGHJKLQWERTYUIOPZXCVBNM`~;:,<.>/?'\"!@#$%^&*()[{]}-_=+"
 )
 
 // fzf events

src/core.go

@@ -28,16 +28,11 @@ package fzf
 import (
 	"fmt"
 	"os"
-	"runtime"
 	"time"
 
 	"github.com/junegunn/fzf/src/util"
 )
 
-func initProcs() {
-	runtime.GOMAXPROCS(runtime.NumCPU())
-}
-
 /*
 Reader   -> EvtReadFin
 Reader   -> EvtReadNew        -> Matcher  (restart)
@@ -49,8 +44,6 @@ Matcher  -> EvtHeader         -> Terminal (update header)
 
 // Run starts fzf
 func Run(opts *Options) {
-	initProcs()
-
 	sort := opts.Sort > 0
 	sortCriteria = opts.Criteria
 
@@ -63,29 +56,29 @@ func Run(opts *Options) {
 	eventBox := util.NewEventBox()
 
 	// ANSI code processor
-	ansiProcessor := func(data []byte) ([]rune, []ansiOffset) {
-		return util.BytesToRunes(data), nil
+	ansiProcessor := func(data []byte) (util.Chars, *[]ansiOffset) {
+		return util.ToChars(data), nil
 	}
-	ansiProcessorRunes := func(data []rune) ([]rune, []ansiOffset) {
-		return data, nil
+	ansiProcessorRunes := func(data []rune) (util.Chars, *[]ansiOffset) {
+		return util.RunesToChars(data), nil
 	}
 	if opts.Ansi {
 		if opts.Theme != nil {
 			var state *ansiState
-			ansiProcessor = func(data []byte) ([]rune, []ansiOffset) {
-				trimmed, offsets, newState := extractColor(string(data), state)
+			ansiProcessor = func(data []byte) (util.Chars, *[]ansiOffset) {
+				trimmed, offsets, newState := extractColor(string(data), state, nil)
 				state = newState
-				return []rune(trimmed), offsets
+				return util.RunesToChars([]rune(trimmed)), offsets
 			}
 		} else {
 			// When color is disabled but ansi option is given,
 			// we simply strip out ANSI codes from the input
-			ansiProcessor = func(data []byte) ([]rune, []ansiOffset) {
-				trimmed, _, _ := extractColor(string(data), nil)
-				return []rune(trimmed), nil
+			ansiProcessor = func(data []byte) (util.Chars, *[]ansiOffset) {
+				trimmed, _, _ := extractColor(string(data), nil, nil)
+				return util.RunesToChars([]rune(trimmed)), nil
 			}
 		}
-		ansiProcessorRunes = func(data []rune) ([]rune, []ansiOffset) {
+		ansiProcessorRunes = func(data []rune) (util.Chars, *[]ansiOffset) {
 			return ansiProcessor([]byte(string(data)))
 		}
 	}
@@ -100,29 +93,28 @@ func Run(opts *Options) {
 				eventBox.Set(EvtHeader, header)
 				return nil
 			}
-			runes, colors := ansiProcessor(data)
+			chars, colors := ansiProcessor(data)
 			return &Item{
-				text:   runes,
-				colors: colors,
-				rank:   buildEmptyRank(int32(index))}
+				index:  int32(index),
+				text:   chars,
+				colors: colors}
 		})
 	} else {
 		chunkList = NewChunkList(func(data []byte, index int) *Item {
-			runes := util.BytesToRunes(data)
-			tokens := Tokenize(runes, opts.Delimiter)
+			tokens := Tokenize(util.ToChars(data), opts.Delimiter)
 			trans := Transform(tokens, opts.WithNth)
 			if len(header) < opts.HeaderLines {
 				header = append(header, string(joinTokens(trans)))
 				eventBox.Set(EvtHeader, header)
 				return nil
 			}
+			textRunes := joinTokens(trans)
 			item := Item{
-				text:     joinTokens(trans),
-				origText: &runes,
-				colors:   nil,
-				rank:     buildEmptyRank(int32(index))}
+				index:    int32(index),
+				origText: &data,
+				colors:   nil}
 
-			trimmed, colors := ansiProcessorRunes(item.text)
+			trimmed, colors := ansiProcessorRunes(textRunes)
 			item.text = trimmed
 			item.colors = colors
 			return &item
@@ -151,27 +143,30 @@ func Run(opts *Options) {
 	}
 	patternBuilder := func(runes []rune) *Pattern {
 		return BuildPattern(
-			opts.Fuzzy, opts.Extended, opts.Case, forward,
-			opts.Nth, opts.Delimiter, runes)
+			opts.Fuzzy, opts.FuzzyAlgo, opts.Extended, opts.Case, forward,
+			opts.Filter == nil, opts.Nth, opts.Delimiter, runes)
 	}
 	matcher := NewMatcher(patternBuilder, sort, opts.Tac, eventBox)
 
 	// Filtering mode
 	if opts.Filter != nil {
 		if opts.PrintQuery {
-			fmt.Println(*opts.Filter)
+			opts.Printer(*opts.Filter)
 		}
 
 		pattern := patternBuilder([]rune(*opts.Filter))
 
 		found := false
 		if streamingFilter {
+			slab := util.MakeSlab(slab16Size, slab32Size)
 			reader := Reader{
 				func(runes []byte) bool {
 					item := chunkList.trans(runes, 0)
-					if item != nil && pattern.MatchItem(item) {
-						fmt.Println(string(item.text))
-						found = true
+					if item != nil {
+						if result, _, _ := pattern.MatchItem(item, false, slab); result != nil {
+							opts.Printer(item.text.ToString())
+							found = true
+						}
 					}
 					return false
 				}, eventBox, opts.ReadZero}
@@ -185,7 +180,7 @@ func Run(opts *Options) {
 				chunks:  snapshot,
 				pattern: pattern})
 			for i := 0; i < merger.Length(); i++ {
-				fmt.Println(merger.Get(i).AsString(opts.Ansi))
+				opts.Printer(merger.Get(i).item.AsString(opts.Ansi))
 				found = true
 			}
 		}
@@ -259,13 +254,13 @@ func Run(opts *Options) {
 							} else if val.final {
 								if opts.Exit0 && count == 0 || opts.Select1 && count == 1 {
 									if opts.PrintQuery {
-										fmt.Println(opts.Query)
+										opts.Printer(opts.Query)
 									}
 									if len(opts.Expect) > 0 {
-										fmt.Println()
+										opts.Printer("")
 									}
 									for i := 0; i < count; i++ {
-										fmt.Println(val.Get(i).AsString(opts.Ansi))
+										opts.Printer(val.Get(i).item.AsString(opts.Ansi))
 									}
 									if count > 0 {
 										os.Exit(exitOk)

src/curses/curses.go

@@ -23,6 +23,16 @@ import (
 	"unicode/utf8"
 )
 
+const (
+	Bold      = C.A_BOLD
+	Dim       = C.A_DIM
+	Blink     = C.A_BLINK
+	Reverse   = C.A_REVERSE
+	Underline = C.A_UNDERLINE
+)
+
+type Attr C.int
+
 // Types of user action
 const (
 	Rune = iota
@@ -80,7 +90,16 @@ const (
 	F2
 	F3
 	F4
+	F5
+	F6
+	F7
+	F8
+	F9
+	F10
 
+	AltEnter
+	AltSpace
+	AltSlash
 	AltBS
 	AltA
 	AltB
@@ -104,11 +123,14 @@ const (
 	ColCursor
 	ColSelected
 	ColHeader
-	ColUser
+	ColBorder
+	ColUser // Should be the last entry
 )
 
 const (
 	doubleClickDuration = 500 * time.Millisecond
+	colDefault          = -1
+	colUndefined        = -2
 )
 
 type ColorTheme struct {
@@ -125,6 +147,7 @@ type ColorTheme struct {
 	Cursor       int16
 	Selected     int16
 	Header       int16
+	Border       int16
 }
 
 type Event struct {
@@ -145,7 +168,7 @@ type MouseEvent struct {
 var (
 	_buf          []byte
 	_in           *os.File
-	_color        func(int, bool) C.int
+	_color        func(int, Attr) C.int
 	_colorMap     map[int]int
 	_prevDownTime time.Time
 	_clickY       []int
@@ -159,6 +182,49 @@ var (
 	DarkBG        int
 )
 
+type Window struct {
+	win    *C.WINDOW
+	Top    int
+	Left   int
+	Width  int
+	Height int
+}
+
+func NewWindow(top int, left int, width int, height int, border bool) *Window {
+	win := C.newwin(C.int(height), C.int(width), C.int(top), C.int(left))
+	if border {
+		attr := _color(ColBorder, 0)
+		C.wattron(win, attr)
+		C.box(win, 0, 0)
+		C.wattroff(win, attr)
+	}
+	return &Window{
+		win:    win,
+		Top:    top,
+		Left:   left,
+		Width:  width,
+		Height: height,
+	}
+}
+
+func EmptyTheme() *ColorTheme {
+	return &ColorTheme{
+		UseDefault:   true,
+		Fg:           colUndefined,
+		Bg:           colUndefined,
+		DarkBg:       colUndefined,
+		Prompt:       colUndefined,
+		Match:        colUndefined,
+		Current:      colUndefined,
+		CurrentMatch: colUndefined,
+		Spinner:      colUndefined,
+		Info:         colUndefined,
+		Cursor:       colUndefined,
+		Selected:     colUndefined,
+		Header:       colUndefined,
+		Border:       colUndefined}
+}
+
 func init() {
 	_prevDownTime = time.Unix(0, 0)
 	_clickY = []int{}
@@ -176,7 +242,8 @@ func init() {
 		Info:         C.COLOR_WHITE,
 		Cursor:       C.COLOR_RED,
 		Selected:     C.COLOR_MAGENTA,
-		Header:       C.COLOR_CYAN}
+		Header:       C.COLOR_CYAN,
+		Border:       C.COLOR_BLACK}
 	Dark256 = &ColorTheme{
 		UseDefault:   true,
 		Fg:           15,
@@ -190,7 +257,8 @@ func init() {
 		Info:         144,
 		Cursor:       161,
 		Selected:     168,
-		Header:       109}
+		Header:       109,
+		Border:       59}
 	Light256 = &ColorTheme{
 		UseDefault:   true,
 		Fg:           15,
@@ -204,25 +272,23 @@ func init() {
 		Info:         101,
 		Cursor:       161,
 		Selected:     168,
-		Header:       31}
+		Header:       31,
+		Border:       145}
 }
 
-func attrColored(pair int, bold bool) C.int {
+func attrColored(pair int, a Attr) C.int {
 	var attr C.int
 	if pair > ColNormal {
 		attr = C.COLOR_PAIR(C.int(pair))
 	}
-	if bold {
-		attr = attr | C.A_BOLD
-	}
-	return attr
+	return attr | C.int(a)
 }
 
-func attrMono(pair int, bold bool) C.int {
+func attrMono(pair int, a Attr) C.int {
 	var attr C.int
 	switch pair {
 	case ColCurrent:
-		if bold {
+		if a&C.A_BOLD == C.A_BOLD {
 			attr = C.A_REVERSE
 		}
 	case ColMatch:
@@ -230,7 +296,7 @@ func attrMono(pair int, bold bool) C.int {
 	case ColCurrentMatch:
 		attr = C.A_UNDERLINE | C.A_REVERSE
 	}
-	if bold {
+	if a&C.A_BOLD == C.A_BOLD {
 		attr = attr | C.A_BOLD
 	}
 	return attr
@@ -280,44 +346,59 @@ func Init(theme *ColorTheme, black bool, mouse bool) {
 
 	if theme != nil {
 		C.start_color()
-		initPairs(theme, black)
+		var baseTheme *ColorTheme
+		if C.tigetnum(C.CString("colors")) >= 256 {
+			baseTheme = Dark256
+		} else {
+			baseTheme = Default16
+		}
+		initPairs(baseTheme, theme, black)
 		_color = attrColored
 	} else {
 		_color = attrMono
 	}
 }
 
-func initPairs(theme *ColorTheme, black bool) {
-	fg := C.short(theme.Fg)
-	bg := C.short(theme.Bg)
+func override(a int16, b int16) C.short {
+	if b == colUndefined {
+		return C.short(a)
+	}
+	return C.short(b)
+}
+
+func initPairs(baseTheme *ColorTheme, theme *ColorTheme, black bool) {
+	fg := override(baseTheme.Fg, theme.Fg)
+	bg := override(baseTheme.Bg, theme.Bg)
 	if black {
 		bg = C.COLOR_BLACK
 	} else if theme.UseDefault {
-		fg = -1
-		bg = -1
+		fg = colDefault
+		bg = colDefault
 		C.use_default_colors()
 	}
 	if theme.UseDefault {
-		FG = -1
-		BG = -1
+		FG = colDefault
+		BG = colDefault
 	} else {
 		FG = int(fg)
 		BG = int(bg)
-		C.assume_default_colors(C.int(theme.Fg), C.int(bg))
+		C.assume_default_colors(C.int(override(baseTheme.Fg, theme.Fg)), C.int(bg))
 	}
 
-	CurrentFG = int(theme.Current)
-	DarkBG = int(theme.DarkBg)
-	darkBG := C.short(DarkBG)
-	C.init_pair(ColPrompt, C.short(theme.Prompt), bg)
-	C.init_pair(ColMatch, C.short(theme.Match), bg)
-	C.init_pair(ColCurrent, C.short(theme.Current), darkBG)
-	C.init_pair(ColCurrentMatch, C.short(theme.CurrentMatch), darkBG)
-	C.init_pair(ColSpinner, C.short(theme.Spinner), bg)
-	C.init_pair(ColInfo, C.short(theme.Info), bg)
-	C.init_pair(ColCursor, C.short(theme.Cursor), darkBG)
-	C.init_pair(ColSelected, C.short(theme.Selected), darkBG)
-	C.init_pair(ColHeader, C.short(theme.Header), bg)
+	currentFG := override(baseTheme.Current, theme.Current)
+	darkBG := override(baseTheme.DarkBg, theme.DarkBg)
+	CurrentFG = int(currentFG)
+	DarkBG = int(darkBG)
+	C.init_pair(ColPrompt, override(baseTheme.Prompt, theme.Prompt), bg)
+	C.init_pair(ColMatch, override(baseTheme.Match, theme.Match), bg)
+	C.init_pair(ColCurrent, currentFG, darkBG)
+	C.init_pair(ColCurrentMatch, override(baseTheme.CurrentMatch, theme.CurrentMatch), darkBG)
+	C.init_pair(ColSpinner, override(baseTheme.Spinner, theme.Spinner), bg)
+	C.init_pair(ColInfo, override(baseTheme.Info, theme.Info), bg)
+	C.init_pair(ColCursor, override(baseTheme.Cursor, theme.Cursor), darkBG)
+	C.init_pair(ColSelected, override(baseTheme.Selected, theme.Selected), darkBG)
+	C.init_pair(ColHeader, override(baseTheme.Header, theme.Header), bg)
+	C.init_pair(ColBorder, override(baseTheme.Border, theme.Border), bg)
 }
 
 func Close() {
@@ -373,7 +454,9 @@ func mouseSequence(sz *int) Event {
 		97, 101, 105, 113: // scroll-down / shift / cmd / ctrl
 		mod := _buf[3] >= 100
 		s := 1 - int(_buf[3]%2)*2
-		return Event{Mouse, 0, &MouseEvent{0, 0, s, false, false, mod}}
+		x := int(_buf[4] - 33)
+		y := int(_buf[5] - 33)
+		return Event{Mouse, 0, &MouseEvent{y, x, s, false, false, mod}}
 	}
 	return Event{Invalid, 0, nil}
 }
@@ -384,6 +467,12 @@ func escSequence(sz *int) Event {
 	}
 	*sz = 2
 	switch _buf[1] {
+	case 13:
+		return Event{AltEnter, 0, nil}
+	case 32:
+		return Event{AltSpace, 0, nil}
+	case 47:
+		return Event{AltSlash, 0, nil}
 	case 98:
 		return Event{AltB, 0, nil}
 	case 100:
@@ -429,6 +518,20 @@ func escSequence(sz *int) Event {
 			*sz = 4
 			switch _buf[2] {
 			case 50:
+				if len(_buf) == 5 && _buf[4] == 126 {
+					*sz = 5
+					switch _buf[3] {
+					case 48:
+						return Event{F9, 0, nil}
+					case 49:
+						return Event{F10, 0, nil}
+					}
+				}
+				// Bracketed paste mode \e[200~ / \e[201
+				if _buf[3] == 48 && (_buf[4] == 48 || _buf[4] == 49) && _buf[5] == 126 {
+					*sz = 6
+					return Event{Invalid, 0, nil}
+				}
 				return Event{Invalid, 0, nil} // INS
 			case 51:
 				return Event{Del, 0, nil}
@@ -442,6 +545,21 @@ func escSequence(sz *int) Event {
 				switch _buf[3] {
 				case 126:
 					return Event{Home, 0, nil}
+				case 53, 55, 56, 57:
+					if len(_buf) == 5 && _buf[4] == 126 {
+						*sz = 5
+						switch _buf[3] {
+						case 53:
+							return Event{F5, 0, nil}
+						case 55:
+							return Event{F6, 0, nil}
+						case 56:
+							return Event{F7, 0, nil}
+						case 57:
+							return Event{F8, 0, nil}
+						}
+					}
+					return Event{Invalid, 0, nil}
 				case 59:
 					if len(_buf) != 6 {
 						return Event{Invalid, 0, nil}
@@ -511,17 +629,25 @@ func GetChar() Event {
 	return Event{Rune, r, nil}
 }
 
-func Move(y int, x int) {
-	C.move(C.int(y), C.int(x))
+func (w *Window) Close() {
+	C.delwin(w.win)
 }
 
-func MoveAndClear(y int, x int) {
-	Move(y, x)
-	C.clrtoeol()
+func (w *Window) Enclose(y int, x int) bool {
+	return bool(C.wenclose(w.win, C.int(y), C.int(x)))
 }
 
-func Print(text string) {
-	C.addstr(C.CString(strings.Map(func(r rune) rune {
+func (w *Window) Move(y int, x int) {
+	C.wmove(w.win, C.int(y), C.int(x))
+}
+
+func (w *Window) MoveAndClear(y int, x int) {
+	w.Move(y, x)
+	C.wclrtoeol(w.win)
+}
+
+func (w *Window) Print(text string) {
+	C.waddstr(w.win, C.CString(strings.Map(func(r rune) rune {
 		if r < 32 {
 			return -1
 		}
@@ -529,11 +655,11 @@ func Print(text string) {
 	}, text)))
 }
 
-func CPrint(pair int, bold bool, text string) {
-	attr := _color(pair, bold)
-	C.attron(attr)
-	Print(text)
-	C.attroff(attr)
+func (w *Window) CPrint(pair int, a Attr, text string) {
+	attr := _color(pair, a)
+	C.wattron(w.win, attr)
+	w.Print(text)
+	C.wattroff(w.win, attr)
 }
 
 func Clear() {
@@ -548,6 +674,30 @@ func Refresh() {
 	C.refresh()
 }
 
+func (w *Window) Erase() {
+	C.werase(w.win)
+}
+
+func (w *Window) Fill(str string) bool {
+	return C.waddstr(w.win, C.CString(str)) == C.OK
+}
+
+func (w *Window) CFill(str string, fg int, bg int, a Attr) bool {
+	attr := _color(PairFor(fg, bg), a)
+	C.wattron(w.win, attr)
+	ret := w.Fill(str)
+	C.wattroff(w.win, attr)
+	return ret
+}
+
+func (w *Window) Refresh() {
+	C.wnoutrefresh(w.win)
+}
+
+func DoUpdate() {
+	C.doupdate()
+}
+
 func PairFor(fg int, bg int) int {
 	key := (fg << 8) + bg
 	if found, prs := _colorMap[key]; prs {

src/item.go

@@ -1,288 +1,39 @@
 package fzf
 
 import (
-	"math"
-
-	"github.com/junegunn/fzf/src/curses"
+	"github.com/junegunn/fzf/src/util"
 )
 
-// Offset holds three 32-bit integers denoting the offsets of a matched substring
-type Offset [3]int32
-
-type colorOffset struct {
-	offset [2]int32
-	color  int
-	bold   bool
-}
-
 // Item represents each input line
 type Item struct {
-	text        []rune
-	origText    *[]rune
+	index       int32
+	text        util.Chars
+	origText    *[]byte
+	colors      *[]ansiOffset
 	transformed []Token
-	offsets     []Offset
-	colors      []ansiOffset
-	rank        [5]int32
-}
-
-// Sort criteria to use. Never changes once fzf is started.
-var sortCriteria []criterion
-
-func isRankValid(rank [5]int32) bool {
-	// Exclude ordinal index
-	for _, r := range rank[:4] {
-		if r > 0 {
-			return true
-		}
-	}
-	return false
-}
-
-func buildEmptyRank(index int32) [5]int32 {
-	return [5]int32{0, 0, 0, 0, index}
 }
 
+// Index returns ordinal index of the Item
 func (item *Item) Index() int32 {
-	return item.rank[4]
+	return item.index
 }
 
-// Rank calculates rank of the Item
-func (item *Item) Rank(cache bool) [5]int32 {
-	if cache && isRankValid(item.rank) {
-		return item.rank
+// Colors returns ansiOffsets of the Item
+func (item *Item) Colors() []ansiOffset {
+	if item.colors == nil {
+		return []ansiOffset{}
 	}
-	matchlen := 0
-	prevEnd := 0
-	lenSum := 0
-	minBegin := math.MaxInt32
-	for _, offset := range item.offsets {
-		begin := int(offset[0])
-		end := int(offset[1])
-		trimLen := int(offset[2])
-		lenSum += trimLen
-		if prevEnd > begin {
-			begin = prevEnd
-		}
-		if end > prevEnd {
-			prevEnd = end
-		}
-		if end > begin {
-			if begin < minBegin {
-				minBegin = begin
-			}
-			matchlen += end - begin
-		}
-	}
-	if matchlen == 0 {
-		matchlen = math.MaxInt32
-	}
-	rank := buildEmptyRank(item.Index())
-	for idx, criterion := range sortCriteria {
-		var val int32
-		switch criterion {
-		case byMatchLen:
-			val = int32(matchlen)
-		case byLength:
-			// It is guaranteed that .transformed in not null in normal execution
-			if item.transformed != nil {
-				// If offsets is empty, lenSum will be 0, but we don't care
-				val = int32(lenSum)
-			} else {
-				val = int32(len(item.text))
-			}
-		case byBegin:
-			// We can't just look at item.offsets[0][0] because it can be an inverse term
-			whitePrefixLen := 0
-			for idx, r := range item.text {
-				whitePrefixLen = idx
-				if idx == minBegin || r != ' ' && r != '\t' {
-					break
-				}
-			}
-			val = int32(minBegin - whitePrefixLen)
-		case byEnd:
-			if prevEnd > 0 {
-				val = int32(1 + len(item.text) - prevEnd)
-			} else {
-				// Empty offsets due to inverse terms.
-				val = 1
-			}
-		}
-		rank[idx] = val
-	}
-	if cache {
-		item.rank = rank
-	}
-	return rank
+	return *item.colors
 }
 
 // AsString returns the original string
 func (item *Item) AsString(stripAnsi bool) string {
-	return *item.StringPtr(stripAnsi)
-}
-
-// StringPtr returns the pointer to the original string
-func (item *Item) StringPtr(stripAnsi bool) *string {
 	if item.origText != nil {
 		if stripAnsi {
-			trimmed, _, _ := extractColor(string(*item.origText), nil)
-			return &trimmed
+			trimmed, _, _ := extractColor(string(*item.origText), nil, nil)
+			return trimmed
 		}
-		orig := string(*item.origText)
-		return &orig
+		return string(*item.origText)
 	}
-	str := string(item.text)
-	return &str
-}
-
-func (item *Item) colorOffsets(color int, bold bool, current bool) []colorOffset {
-	if len(item.colors) == 0 {
-		var offsets []colorOffset
-		for _, off := range item.offsets {
-
-			offsets = append(offsets, colorOffset{offset: [2]int32{off[0], off[1]}, color: color, bold: bold})
-		}
-		return offsets
-	}
-
-	// Find max column
-	var maxCol int32
-	for _, off := range item.offsets {
-		if off[1] > maxCol {
-			maxCol = off[1]
-		}
-	}
-	for _, ansi := range item.colors {
-		if ansi.offset[1] > maxCol {
-			maxCol = ansi.offset[1]
-		}
-	}
-	cols := make([]int, maxCol)
-
-	for colorIndex, ansi := range item.colors {
-		for i := ansi.offset[0]; i < ansi.offset[1]; i++ {
-			cols[i] = colorIndex + 1 // XXX
-		}
-	}
-
-	for _, off := range item.offsets {
-		for i := off[0]; i < off[1]; i++ {
-			cols[i] = -1
-		}
-	}
-
-	// sort.Sort(ByOrder(offsets))
-
-	// Merge offsets
-	// ------------  ----  --  ----
-	//   ++++++++      ++++++++++
-	// --++++++++--  --++++++++++---
-	curr := 0
-	start := 0
-	var offsets []colorOffset
-	add := func(idx int) {
-		if curr != 0 && idx > start {
-			if curr == -1 {
-				offsets = append(offsets, colorOffset{
-					offset: [2]int32{int32(start), int32(idx)}, color: color, bold: bold})
-			} else {
-				ansi := item.colors[curr-1]
-				fg := ansi.color.fg
-				if fg == -1 {
-					if current {
-						fg = curses.CurrentFG
-					} else {
-						fg = curses.FG
-					}
-				}
-				bg := ansi.color.bg
-				if bg == -1 {
-					if current {
-						bg = curses.DarkBG
-					} else {
-						bg = curses.BG
-					}
-				}
-				offsets = append(offsets, colorOffset{
-					offset: [2]int32{int32(start), int32(idx)},
-					color:  curses.PairFor(fg, bg),
-					bold:   ansi.color.bold || bold})
-			}
-		}
-	}
-	for idx, col := range cols {
-		if col != curr {
-			add(idx)
-			start = idx
-			curr = col
-		}
-	}
-	add(int(maxCol))
-	return offsets
-}
-
-// ByOrder is for sorting substring offsets
-type ByOrder []Offset
-
-func (a ByOrder) Len() int {
-	return len(a)
-}
-
-func (a ByOrder) Swap(i, j int) {
-	a[i], a[j] = a[j], a[i]
-}
-
-func (a ByOrder) Less(i, j int) bool {
-	ioff := a[i]
-	joff := a[j]
-	return (ioff[0] < joff[0]) || (ioff[0] == joff[0]) && (ioff[1] <= joff[1])
-}
-
-// ByRelevance is for sorting Items
-type ByRelevance []*Item
-
-func (a ByRelevance) Len() int {
-	return len(a)
-}
-
-func (a ByRelevance) Swap(i, j int) {
-	a[i], a[j] = a[j], a[i]
-}
-
-func (a ByRelevance) Less(i, j int) bool {
-	irank := a[i].Rank(true)
-	jrank := a[j].Rank(true)
-
-	return compareRanks(irank, jrank, false)
-}
-
-// ByRelevanceTac is for sorting Items
-type ByRelevanceTac []*Item
-
-func (a ByRelevanceTac) Len() int {
-	return len(a)
-}
-
-func (a ByRelevanceTac) Swap(i, j int) {
-	a[i], a[j] = a[j], a[i]
-}
-
-func (a ByRelevanceTac) Less(i, j int) bool {
-	irank := a[i].Rank(true)
-	jrank := a[j].Rank(true)
-
-	return compareRanks(irank, jrank, true)
-}
-
-func compareRanks(irank [5]int32, jrank [5]int32, tac bool) bool {
-	for idx := 0; idx < 4; idx++ {
-		left := irank[idx]
-		right := jrank[idx]
-		if left < right {
-			return true
-		} else if left > right {
-			return false
-		}
-	}
-	return (irank[4] <= jrank[4]) != tac
+	return item.text.ToString()
 }

src/item_test.go

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

src/matcher.go

@@ -26,6 +26,7 @@ type Matcher struct {
 	eventBox       *util.EventBox
 	reqBox         *util.EventBox
 	partitions     int
+	slab           []*util.Slab
 	mergerCache    map[string]*Merger
 }
 
@@ -37,13 +38,15 @@ const (
 // NewMatcher returns a new Matcher
 func NewMatcher(patternBuilder func([]rune) *Pattern,
 	sort bool, tac bool, eventBox *util.EventBox) *Matcher {
+	partitions := util.Min(numPartitionsMultiplier*runtime.NumCPU(), maxPartitions)
 	return &Matcher{
 		patternBuilder: patternBuilder,
 		sort:           sort,
 		tac:            tac,
 		eventBox:       eventBox,
 		reqBox:         util.NewEventBox(),
-		partitions:     runtime.NumCPU(),
+		partitions:     partitions,
+		slab:           make([]*util.Slab, partitions),
 		mergerCache:    make(map[string]*Merger)}
 }
 
@@ -106,18 +109,19 @@ func (m *Matcher) Loop() {
 }
 
 func (m *Matcher) sliceChunks(chunks []*Chunk) [][]*Chunk {
-	perSlice := len(chunks) / m.partitions
+	partitions := m.partitions
+	perSlice := len(chunks) / partitions
 
-	// No need to parallelize
 	if perSlice == 0 {
-		return [][]*Chunk{chunks}
+		partitions = len(chunks)
+		perSlice = 1
 	}
 
-	slices := make([][]*Chunk, m.partitions)
-	for i := 0; i < m.partitions; i++ {
+	slices := make([][]*Chunk, partitions)
+	for i := 0; i < partitions; i++ {
 		start := i * perSlice
 		end := start + perSlice
-		if i == m.partitions-1 {
+		if i == partitions-1 {
 			end = len(chunks)
 		}
 		slices[i] = chunks[start:end]
@@ -127,7 +131,7 @@ func (m *Matcher) sliceChunks(chunks []*Chunk) [][]*Chunk {
 
 type partialResult struct {
 	index   int
-	matches []*Item
+	matches []*Result
 }
 
 func (m *Matcher) scan(request MatchRequest) (*Merger, bool) {
@@ -152,17 +156,26 @@ func (m *Matcher) scan(request MatchRequest) (*Merger, bool) {
 
 	for idx, chunks := range slices {
 		waitGroup.Add(1)
-		go func(idx int, chunks []*Chunk) {
+		if m.slab[idx] == nil {
+			m.slab[idx] = util.MakeSlab(slab16Size, slab32Size)
+		}
+		go func(idx int, slab *util.Slab, chunks []*Chunk) {
 			defer func() { waitGroup.Done() }()
-			sliceMatches := []*Item{}
-			for _, chunk := range chunks {
-				matches := request.pattern.Match(chunk)
-				sliceMatches = append(sliceMatches, matches...)
+			count := 0
+			allMatches := make([][]*Result, len(chunks))
+			for idx, chunk := range chunks {
+				matches := request.pattern.Match(chunk, slab)
+				allMatches[idx] = matches
+				count += len(matches)
 				if cancelled.Get() {
 					return
 				}
 				countChan <- len(matches)
 			}
+			sliceMatches := make([]*Result, 0, count)
+			for _, matches := range allMatches {
+				sliceMatches = append(sliceMatches, matches...)
+			}
 			if m.sort {
 				if m.tac {
 					sort.Sort(ByRelevanceTac(sliceMatches))
@@ -171,7 +184,7 @@ func (m *Matcher) scan(request MatchRequest) (*Merger, bool) {
 				}
 			}
 			resultChan <- partialResult{idx, sliceMatches}
-		}(idx, chunks)
+		}(idx, m.slab[idx], chunks)
 	}
 
 	wait := func() bool {
@@ -199,12 +212,12 @@ func (m *Matcher) scan(request MatchRequest) (*Merger, bool) {
 		}
 	}
 
-	partialResults := make([][]*Item, numSlices)
-	for _, _ = range slices {
+	partialResults := make([][]*Result, numSlices)
+	for _ = range slices {
 		partialResult := <-resultChan
 		partialResults[partialResult.index] = partialResult.matches
 	}
-	return NewMerger(partialResults, m.sort, m.tac), false
+	return NewMerger(pattern, partialResults, m.sort, m.tac), false
 }
 
 // Reset is called to interrupt/signal the ongoing search

src/merger.go

@@ -2,14 +2,15 @@ package fzf
 
 import "fmt"
 
-// Merger with no data
-var EmptyMerger = NewMerger([][]*Item{}, false, false)
+// EmptyMerger is a Merger with no data
+var EmptyMerger = NewMerger(nil, [][]*Result{}, false, false)
 
 // Merger holds a set of locally sorted lists of items and provides the view of
 // a single, globally-sorted list
 type Merger struct {
-	lists   [][]*Item
-	merged  []*Item
+	pattern *Pattern
+	lists   [][]*Result
+	merged  []*Result
 	chunks  *[]*Chunk
 	cursors []int
 	sorted  bool
@@ -22,9 +23,10 @@ type Merger struct {
 // original order
 func PassMerger(chunks *[]*Chunk, tac bool) *Merger {
 	mg := Merger{
-		chunks: chunks,
-		tac:    tac,
-		count:  0}
+		pattern: nil,
+		chunks:  chunks,
+		tac:     tac,
+		count:   0}
 
 	for _, chunk := range *mg.chunks {
 		mg.count += len(*chunk)
@@ -33,10 +35,11 @@ func PassMerger(chunks *[]*Chunk, tac bool) *Merger {
 }
 
 // NewMerger returns a new Merger
-func NewMerger(lists [][]*Item, sorted bool, tac bool) *Merger {
+func NewMerger(pattern *Pattern, lists [][]*Result, sorted bool, tac bool) *Merger {
 	mg := Merger{
+		pattern: pattern,
 		lists:   lists,
-		merged:  []*Item{},
+		merged:  []*Result{},
 		chunks:  nil,
 		cursors: make([]int, len(lists)),
 		sorted:  sorted,
@@ -55,14 +58,14 @@ func (mg *Merger) Length() int {
 	return mg.count
 }
 
-// Get returns the pointer to the Item object indexed by the given integer
-func (mg *Merger) Get(idx int) *Item {
+// Get returns the pointer to the Result object indexed by the given integer
+func (mg *Merger) Get(idx int) *Result {
 	if mg.chunks != nil {
 		if mg.tac {
 			idx = mg.count - idx - 1
 		}
 		chunk := (*mg.chunks)[idx/chunkSize]
-		return (*chunk)[idx%chunkSize]
+		return &Result{item: (*chunk)[idx%chunkSize]}
 	}
 
 	if mg.sorted {
@@ -86,9 +89,9 @@ func (mg *Merger) cacheable() bool {
 	return mg.count < mergerCacheMax
 }
 
-func (mg *Merger) mergedGet(idx int) *Item {
+func (mg *Merger) mergedGet(idx int) *Result {
 	for i := len(mg.merged); i <= idx; i++ {
-		minRank := buildEmptyRank(0)
+		minRank := minRank()
 		minIdx := -1
 		for listIdx, list := range mg.lists {
 			cursor := mg.cursors[listIdx]
@@ -97,7 +100,7 @@ func (mg *Merger) mergedGet(idx int) *Item {
 				continue
 			}
 			if cursor >= 0 {
-				rank := list[cursor].Rank(false)
+				rank := list[cursor].rank
 				if minIdx < 0 || compareRanks(rank, minRank, mg.tac) {
 					minRank = rank
 					minIdx = listIdx

src/merger_test.go

@@ -5,6 +5,8 @@ import (
 	"math/rand"
 	"sort"
 	"testing"
+
+	"github.com/junegunn/fzf/src/util"
 )
 
 func assert(t *testing.T, cond bool, msg ...string) {
@@ -13,18 +15,11 @@ func assert(t *testing.T, cond bool, msg ...string) {
 	}
 }
 
-func randItem() *Item {
+func randResult() *Result {
 	str := fmt.Sprintf("%d", rand.Uint32())
-	offsets := make([]Offset, rand.Int()%3)
-	for idx := range offsets {
-		sidx := int32(rand.Uint32() % 20)
-		eidx := sidx + int32(rand.Uint32()%20)
-		offsets[idx] = Offset{sidx, eidx}
-	}
-	return &Item{
-		text:    []rune(str),
-		rank:    buildEmptyRank(rand.Int31()),
-		offsets: offsets}
+	return &Result{
+		item: &Item{text: util.RunesToChars([]rune(str))},
+		rank: rank{index: rand.Int31()}}
 }
 
 func TestEmptyMerger(t *testing.T) {
@@ -34,23 +29,23 @@ func TestEmptyMerger(t *testing.T) {
 	assert(t, len(EmptyMerger.merged) == 0, "Invalid merged list")
 }
 
-func buildLists(partiallySorted bool) ([][]*Item, []*Item) {
+func buildLists(partiallySorted bool) ([][]*Result, []*Result) {
 	numLists := 4
-	lists := make([][]*Item, numLists)
+	lists := make([][]*Result, numLists)
 	cnt := 0
 	for i := 0; i < numLists; i++ {
-		numItems := rand.Int() % 20
-		cnt += numItems
-		lists[i] = make([]*Item, numItems)
-		for j := 0; j < numItems; j++ {
-			item := randItem()
+		numResults := rand.Int() % 20
+		cnt += numResults
+		lists[i] = make([]*Result, numResults)
+		for j := 0; j < numResults; j++ {
+			item := randResult()
 			lists[i][j] = item
 		}
 		if partiallySorted {
 			sort.Sort(ByRelevance(lists[i]))
 		}
 	}
-	items := []*Item{}
+	items := []*Result{}
 	for _, list := range lists {
 		items = append(items, list...)
 	}
@@ -62,7 +57,7 @@ func TestMergerUnsorted(t *testing.T) {
 	cnt := len(items)
 
 	// Not sorted: same order
-	mg := NewMerger(lists, false, false)
+	mg := NewMerger(nil, lists, false, false)
 	assert(t, cnt == mg.Length(), "Invalid Length")
 	for i := 0; i < cnt; i++ {
 		assert(t, items[i] == mg.Get(i), "Invalid Get")
@@ -74,7 +69,7 @@ func TestMergerSorted(t *testing.T) {
 	cnt := len(items)
 
 	// Sorted sorted order
-	mg := NewMerger(lists, true, false)
+	mg := NewMerger(nil, lists, true, false)
 	assert(t, cnt == mg.Length(), "Invalid Length")
 	sort.Sort(ByRelevance(items))
 	for i := 0; i < cnt; i++ {
@@ -84,7 +79,7 @@ func TestMergerSorted(t *testing.T) {
 	}
 
 	// Inverse order
-	mg2 := NewMerger(lists, true, false)
+	mg2 := NewMerger(nil, lists, true, false)
 	for i := cnt - 1; i >= 0; i-- {
 		if items[i] != mg2.Get(i) {
 			t.Error("Not sorted", items[i], mg2.Get(i))

src/options.go

@@ -1,12 +1,14 @@
 package fzf
 
 import (
+	"fmt"
 	"os"
 	"regexp"
 	"strconv"
 	"strings"
 	"unicode/utf8"
 
+	"github.com/junegunn/fzf/src/algo"
 	"github.com/junegunn/fzf/src/curses"
 
 	"github.com/junegunn/go-shellwords"
@@ -18,40 +20,53 @@ const usage = `usage: fzf [options]
     -x, --extended        Extended-search mode
                           (enabled by default; +x or --no-extended to disable)
     -e, --exact           Enable Exact-match
+    --algo=TYPE           Fuzzy matching algorithm: [v1|v2] (default: v2)
     -i                    Case-insensitive match (default: smart-case match)
     +i                    Case-sensitive match
     -n, --nth=N[,..]      Comma-separated list of field index expressions
                           for limiting search scope. Each can be a non-zero
                           integer or a range expression ([BEGIN]..[END]).
-    --with-nth=N[,..]     Transform item using index expressions within finder
-    -d, --delimiter=STR   Field delimiter regex for --nth (default: AWK-style)
+    --with-nth=N[,..]     Transform the presentation of each line using
+                          field index expressions
+    -d, --delimiter=STR   Field delimiter regex (default: AWK-style)
     +s, --no-sort         Do not sort the result
     --tac                 Reverse the order of the input
     --tiebreak=CRI[,..]   Comma-separated list of sort criteria to apply
-                          when the scores are tied;
-                          [length|begin|end|index] (default: length)
+                          when the scores are tied [length|begin|end|index]
+                          (default: length)
 
   Interface
     -m, --multi           Enable multi-select with tab/shift-tab
-    --ansi                Enable processing of ANSI color codes
     --no-mouse            Disable mouse
-    --color=COLSPEC       Base scheme (dark|light|16|bw) and/or custom colors
-    --black               Use black background
-    --reverse             Reverse orientation
-    --margin=MARGIN       Screen margin (TRBL / TB,RL / T,RL,B / T,R,B,L)
-    --tabstop=SPACES      Number of spaces for a tab character (default: 8)
+    --bind=KEYBINDS       Custom key bindings. Refer to the man page.
     --cycle               Enable cyclic scroll
     --no-hscroll          Disable horizontal scroll
     --hscroll-off=COL     Number of screen columns to keep to the right of the
                           highlighted substring (default: 10)
+    --jump-labels=CHARS   Label characters for jump and jump-accept
+
+  Layout
+    --reverse             Reverse orientation
+    --margin=MARGIN       Screen margin (TRBL / TB,RL / T,RL,B / T,R,B,L)
     --inline-info         Display finder info inline with the query
     --prompt=STR          Input prompt (default: '> ')
-    --bind=KEYBINDS       Custom key bindings. Refer to the man page.
-    --history=FILE        History file
-    --history-size=N      Maximum number of history entries (default: 1000)
     --header=STR          String to print as header
     --header-lines=N      The first N lines of the input are treated as header
 
+  Display
+    --ansi                Enable processing of ANSI color codes
+    --tabstop=SPACES      Number of spaces for a tab character (default: 8)
+    --color=COLSPEC       Base scheme (dark|light|16|bw) and/or custom colors
+
+  History
+    --history=FILE        History file
+    --history-size=N      Maximum number of history entries (default: 1000)
+
+  Preview
+    --preview=COMMAND     Command to preview highlighted line ({})
+    --preview-window=OPT  Preview window layout (default: right:50%)
+                          [up|down|left|right][:SIZE[%]][:hidden]
+
   Scripting
     -q, --query=STR       Start the finder with the given query
     -1, --select-1        Automatically select the only match
@@ -81,19 +96,41 @@ const (
 type criterion int
 
 const (
-	byMatchLen criterion = iota
+	byScore criterion = iota
 	byLength
 	byBegin
 	byEnd
 )
 
-func defaultMargin() [4]string {
-	return [4]string{"0", "0", "0", "0"}
+type sizeSpec struct {
+	size    float64
+	percent bool
+}
+
+func defaultMargin() [4]sizeSpec {
+	return [4]sizeSpec{}
+}
+
+type windowPosition int
+
+const (
+	posUp windowPosition = iota
+	posDown
+	posLeft
+	posRight
+)
+
+type previewOpts struct {
+	command  string
+	position windowPosition
+	size     sizeSpec
+	hidden   bool
 }
 
 // Options stores the values of command-line options
 type Options struct {
 	Fuzzy       bool
+	FuzzyAlgo   algo.Algo
 	Extended    bool
 	Case        Case
 	Nth         []Range
@@ -112,6 +149,7 @@ type Options struct {
 	Hscroll     bool
 	HscrollOff  int
 	InlineInfo  bool
+	JumpLabels  string
 	Prompt      string
 	Query       string
 	Select1     bool
@@ -121,27 +159,23 @@ type Options struct {
 	Expect      map[int]string
 	Keymap      map[int]actionType
 	Execmap     map[int]string
+	Preview     previewOpts
 	PrintQuery  bool
 	ReadZero    bool
+	Printer     func(string)
 	Sync        bool
 	History     *History
 	Header      []string
 	HeaderLines int
-	Margin      [4]string
+	Margin      [4]sizeSpec
 	Tabstop     int
 	Version     bool
 }
 
-func defaultTheme() *curses.ColorTheme {
-	if strings.Contains(os.Getenv("TERM"), "256") {
-		return curses.Dark256
-	}
-	return curses.Default16
-}
-
 func defaultOptions() *Options {
 	return &Options{
 		Fuzzy:       true,
+		FuzzyAlgo:   algo.FuzzyMatchV2,
 		Extended:    true,
 		Case:        CaseSmart,
 		Nth:         make([]Range, 0),
@@ -149,17 +183,18 @@ func defaultOptions() *Options {
 		Delimiter:   Delimiter{},
 		Sort:        1000,
 		Tac:         false,
-		Criteria:    []criterion{byMatchLen, byLength},
+		Criteria:    []criterion{byScore, byLength},
 		Multi:       false,
 		Ansi:        false,
 		Mouse:       true,
-		Theme:       defaultTheme(),
+		Theme:       curses.EmptyTheme(),
 		Black:       false,
 		Reverse:     false,
 		Cycle:       false,
 		Hscroll:     true,
 		HscrollOff:  10,
 		InlineInfo:  false,
+		JumpLabels:  defaultJumpLabels,
 		Prompt:      "> ",
 		Query:       "",
 		Select1:     false,
@@ -169,8 +204,10 @@ func defaultOptions() *Options {
 		Expect:      make(map[int]string),
 		Keymap:      make(map[int]actionType),
 		Execmap:     make(map[int]string),
+		Preview:     previewOpts{"", posRight, sizeSpec{50, true}, false},
 		PrintQuery:  false,
 		ReadZero:    false,
+		Printer:     func(str string) { fmt.Println(str) },
 		Sync:        false,
 		History:     nil,
 		Header:      make([]string, 0),
@@ -290,6 +327,18 @@ func isAlphabet(char uint8) bool {
 	return char >= 'a' && char <= 'z'
 }
 
+func parseAlgo(str string) algo.Algo {
+	switch str {
+	case "v1":
+		return algo.FuzzyMatchV1
+	case "v2":
+		return algo.FuzzyMatchV2
+	default:
+		errorExit("invalid algorithm (expected: v1 or v2)")
+	}
+	return algo.FuzzyMatchV2
+}
+
 func parseKeyChords(str string, message string) map[int]string {
 	if len(str) == 0 {
 		errorExit(message)
@@ -322,6 +371,12 @@ func parseKeyChords(str string, message string) map[int]string {
 			chord = curses.AltZ + int(' ')
 		case "bspace", "bs":
 			chord = curses.BSpace
+		case "alt-enter", "alt-return":
+			chord = curses.AltEnter
+		case "alt-space":
+			chord = curses.AltSpace
+		case "alt-/":
+			chord = curses.AltSlash
 		case "alt-bs", "alt-bspace":
 			chord = curses.AltBS
 		case "tab":
@@ -346,12 +401,14 @@ func parseKeyChords(str string, message string) map[int]string {
 			chord = curses.SRight
 		case "double-click":
 			chord = curses.DoubleClick
+		case "f10":
+			chord = curses.F10
 		default:
 			if len(key) == 6 && strings.HasPrefix(lkey, "ctrl-") && isAlphabet(lkey[5]) {
 				chord = curses.CtrlA + int(lkey[5]) - 'a'
 			} else if len(key) == 5 && strings.HasPrefix(lkey, "alt-") && isAlphabet(lkey[4]) {
 				chord = curses.AltA + int(lkey[4]) - 'a'
-			} else if len(key) == 2 && strings.HasPrefix(lkey, "f") && key[1] >= '1' && key[1] <= '4' {
+			} else if len(key) == 2 && strings.HasPrefix(lkey, "f") && key[1] >= '1' && key[1] <= '9' {
 				chord = curses.F1 + int(key[1]) - '1'
 			} else if utf8.RuneCountInString(key) == 1 {
 				chord = curses.AltZ + int([]rune(key)[0])
@@ -367,7 +424,7 @@ func parseKeyChords(str string, message string) map[int]string {
 }
 
 func parseTiebreak(str string) []criterion {
-	criteria := []criterion{byMatchLen}
+	criteria := []criterion{byScore}
 	hasIndex := false
 	hasLength := false
 	hasBegin := false
@@ -454,6 +511,8 @@ func parseTheme(defaultTheme *curses.ColorTheme, str string) *curses.ColorTheme
 				theme.Match = ansi
 			case "hl+":
 				theme.CurrentMatch = ansi
+			case "border":
+				theme.Border = ansi
 			case "prompt":
 				theme.Prompt = ansi
 			case "spinner":
@@ -534,6 +593,8 @@ func parseKeymap(keymap map[int]actionType, execmap map[int]string, str string)
 			keymap[key] = actAbort
 		case "accept":
 			keymap[key] = actAccept
+		case "print-query":
+			keymap[key] = actPrintQuery
 		case "backward-char":
 			keymap[key] = actBackwardChar
 		case "backward-delete-char":
@@ -554,6 +615,10 @@ func parseKeymap(keymap map[int]actionType, execmap map[int]string, str string)
 			keymap[key] = actForwardChar
 		case "forward-word":
 			keymap[key] = actForwardWord
+		case "jump":
+			keymap[key] = actJump
+		case "jump-accept":
+			keymap[key] = actJumpAccept
 		case "kill-line":
 			keymap[key] = actKillLine
 		case "kill-word":
@@ -594,8 +659,18 @@ func parseKeymap(keymap map[int]actionType, execmap map[int]string, str string)
 			keymap[key] = actPreviousHistory
 		case "next-history":
 			keymap[key] = actNextHistory
+		case "toggle-preview":
+			keymap[key] = actTogglePreview
 		case "toggle-sort":
 			keymap[key] = actToggleSort
+		case "preview-up":
+			keymap[key] = actPreviewUp
+		case "preview-down":
+			keymap[key] = actPreviewDown
+		case "preview-page-up":
+			keymap[key] = actPreviewPageUp
+		case "preview-page-down":
+			keymap[key] = actPreviewPageDown
 		default:
 			if isExecuteAction(actLower) {
 				var offset int
@@ -649,40 +724,87 @@ func strLines(str string) []string {
 	return strings.Split(strings.TrimSuffix(str, "\n"), "\n")
 }
 
-func parseMargin(margin string) [4]string {
-	margins := strings.Split(margin, ",")
-	checked := func(str string) string {
-		if strings.HasSuffix(str, "%") {
-			val := atof(str[:len(str)-1])
-			if val < 0 {
-				errorExit("margin must be non-negative")
-			}
-			if val > 100 {
-				errorExit("margin too large")
-			}
-		} else {
-			val := atoi(str)
-			if val < 0 {
-				errorExit("margin must be non-negative")
-			}
+func parseSize(str string, maxPercent float64, label string) sizeSpec {
+	var val float64
+	percent := strings.HasSuffix(str, "%")
+	if percent {
+		val = atof(str[:len(str)-1])
+		if val < 0 {
+			errorExit(label + " must be non-negative")
 		}
-		return str
+		if val > maxPercent {
+			errorExit(fmt.Sprintf("%s too large (max: %d%%)", label, int(maxPercent)))
+		}
+	} else {
+		if strings.Contains(str, ".") {
+			errorExit(label + " (without %) must be a non-negative integer")
+		}
+
+		val = float64(atoi(str))
+		if val < 0 {
+			errorExit(label + " must be non-negative")
+		}
+	}
+	return sizeSpec{val, percent}
+}
+
+func parsePreviewWindow(opts *previewOpts, input string) {
+	layout := input
+	opts.hidden = false
+	if strings.HasSuffix(layout, ":hidden") {
+		opts.hidden = true
+		layout = strings.TrimSuffix(layout, ":hidden")
+	}
+
+	tokens := strings.Split(layout, ":")
+	if len(tokens) == 0 || len(tokens) > 2 {
+		errorExit("invalid window layout: " + input)
+	}
+
+	if len(tokens) > 1 {
+		opts.size = parseSize(tokens[1], 99, "window size")
+	} else {
+		opts.size = sizeSpec{50, true}
+	}
+	if !opts.size.percent && opts.size.size > 0 {
+		// Adjust size for border
+		opts.size.size += 2
+	}
+
+	switch tokens[0] {
+	case "up":
+		opts.position = posUp
+	case "down":
+		opts.position = posDown
+	case "left":
+		opts.position = posLeft
+	case "right":
+		opts.position = posRight
+	default:
+		errorExit("invalid window position: " + input)
+	}
+}
+
+func parseMargin(margin string) [4]sizeSpec {
+	margins := strings.Split(margin, ",")
+	checked := func(str string) sizeSpec {
+		return parseSize(str, 49, "margin")
 	}
 	switch len(margins) {
 	case 1:
 		m := checked(margins[0])
-		return [4]string{m, m, m, m}
+		return [4]sizeSpec{m, m, m, m}
 	case 2:
 		tb := checked(margins[0])
 		rl := checked(margins[1])
-		return [4]string{tb, rl, tb, rl}
+		return [4]sizeSpec{tb, rl, tb, rl}
 	case 3:
 		t := checked(margins[0])
 		rl := checked(margins[1])
 		b := checked(margins[2])
-		return [4]string{t, rl, b, rl}
+		return [4]sizeSpec{t, rl, b, rl}
 	case 4:
-		return [4]string{
+		return [4]sizeSpec{
 			checked(margins[0]), checked(margins[1]),
 			checked(margins[2]), checked(margins[3])}
 	default:
@@ -714,6 +836,7 @@ func parseOptions(opts *Options, allArgs []string) {
 			opts.History.maxSize = historyMax
 		}
 	}
+	validateJumpLabels := false
 	for i := 0; i < len(allArgs); i++ {
 		arg := allArgs[i]
 		switch arg {
@@ -736,6 +859,8 @@ func parseOptions(opts *Options, allArgs []string) {
 		case "-f", "--filter":
 			filter := nextString(allArgs, &i, "query string required")
 			opts.Filter = &filter
+		case "--algo":
+			opts.FuzzyAlgo = parseAlgo(nextString(allArgs, &i, "algorithm required (v1|v2)"))
 		case "--expect":
 			opts.Expect = parseKeyChords(nextString(allArgs, &i, "key names required"), "key names required")
 		case "--tiebreak":
@@ -745,7 +870,7 @@ func parseOptions(opts *Options, allArgs []string) {
 		case "--color":
 			spec := optionalNextString(allArgs, &i)
 			if len(spec) == 0 {
-				opts.Theme = defaultTheme()
+				opts.Theme = curses.EmptyTheme()
 			} else {
 				opts.Theme = parseTheme(opts.Theme, spec)
 			}
@@ -805,6 +930,9 @@ func parseOptions(opts *Options, allArgs []string) {
 			opts.InlineInfo = true
 		case "--no-inline-info":
 			opts.InlineInfo = false
+		case "--jump-labels":
+			opts.JumpLabels = nextString(allArgs, &i, "label characters required")
+			validateJumpLabels = true
 		case "-1", "--select-1":
 			opts.Select1 = true
 		case "+1", "--no-select-1":
@@ -817,6 +945,10 @@ func parseOptions(opts *Options, allArgs []string) {
 			opts.ReadZero = true
 		case "--no-read0":
 			opts.ReadZero = false
+		case "--print0":
+			opts.Printer = func(str string) { fmt.Print(str, "\x00") }
+		case "--no-print0":
+			opts.Printer = func(str string) { fmt.Println(str) }
 		case "--print-query":
 			opts.PrintQuery = true
 		case "--no-print-query":
@@ -844,6 +976,13 @@ func parseOptions(opts *Options, allArgs []string) {
 		case "--header-lines":
 			opts.HeaderLines = atoi(
 				nextString(allArgs, &i, "number of header lines required"))
+		case "--preview":
+			opts.Preview.command = nextString(allArgs, &i, "preview command required")
+		case "--no-preview":
+			opts.Preview.command = ""
+		case "--preview-window":
+			parsePreviewWindow(&opts.Preview,
+				nextString(allArgs, &i, "preview window layout required: [up|down|left|right][:SIZE[%]]"))
 		case "--no-margin":
 			opts.Margin = defaultMargin()
 		case "--margin":
@@ -854,7 +993,9 @@ func parseOptions(opts *Options, allArgs []string) {
 		case "--version":
 			opts.Version = true
 		default:
-			if match, value := optString(arg, "-q", "--query="); match {
+			if match, value := optString(arg, "--algo="); match {
+				opts.FuzzyAlgo = parseAlgo(value)
+			} else if match, value := optString(arg, "-q", "--query="); match {
 				opts.Query = value
 			} else if match, value := optString(arg, "-f", "--filter="); match {
 				opts.Filter = &value
@@ -886,12 +1027,18 @@ func parseOptions(opts *Options, allArgs []string) {
 				opts.Header = strLines(value)
 			} else if match, value := optString(arg, "--header-lines="); match {
 				opts.HeaderLines = atoi(value)
+			} else if match, value := optString(arg, "--preview="); match {
+				opts.Preview.command = value
+			} else if match, value := optString(arg, "--preview-window="); match {
+				parsePreviewWindow(&opts.Preview, value)
 			} else if match, value := optString(arg, "--margin="); match {
 				opts.Margin = parseMargin(value)
 			} else if match, value := optString(arg, "--tabstop="); match {
 				opts.Tabstop = atoi(value)
 			} else if match, value := optString(arg, "--hscroll-off="); match {
 				opts.HscrollOff = atoi(value)
+			} else if match, value := optString(arg, "--jump-labels="); match {
+				opts.JumpLabels = value
 			} else {
 				errorExit("unknown option: " + arg)
 			}
@@ -909,6 +1056,18 @@ func parseOptions(opts *Options, allArgs []string) {
 	if opts.Tabstop < 1 {
 		errorExit("tab stop must be a positive integer")
 	}
+
+	if len(opts.JumpLabels) == 0 {
+		errorExit("empty jump labels")
+	}
+
+	if validateJumpLabels {
+		for _, r := range opts.JumpLabels {
+			if r < 32 || r > 126 {
+				errorExit("non-ascii jump labels are not allowed")
+			}
+		}
+	}
 }
 
 func postProcessOptions(opts *Options) {

src/options_test.go

@@ -5,6 +5,7 @@ import (
 	"testing"
 
 	"github.com/junegunn/fzf/src/curses"
+	"github.com/junegunn/fzf/src/util"
 )
 
 func TestDelimiterRegex(t *testing.T) {
@@ -42,24 +43,24 @@ func TestDelimiterRegex(t *testing.T) {
 
 func TestDelimiterRegexString(t *testing.T) {
 	delim := delimiterRegexp("*")
-	tokens := Tokenize([]rune("-*--*---**---"), delim)
+	tokens := Tokenize(util.RunesToChars([]rune("-*--*---**---")), delim)
 	if delim.regex != nil ||
-		string(tokens[0].text) != "-*" ||
-		string(tokens[1].text) != "--*" ||
-		string(tokens[2].text) != "---*" ||
-		string(tokens[3].text) != "*" ||
-		string(tokens[4].text) != "---" {
+		tokens[0].text.ToString() != "-*" ||
+		tokens[1].text.ToString() != "--*" ||
+		tokens[2].text.ToString() != "---*" ||
+		tokens[3].text.ToString() != "*" ||
+		tokens[4].text.ToString() != "---" {
 		t.Errorf("%s %s %d", delim, tokens, len(tokens))
 	}
 }
 
 func TestDelimiterRegexRegex(t *testing.T) {
 	delim := delimiterRegexp("--\\*")
-	tokens := Tokenize([]rune("-*--*---**---"), delim)
+	tokens := Tokenize(util.RunesToChars([]rune("-*--*---**---")), delim)
 	if delim.str != nil ||
-		string(tokens[0].text) != "-*--*" ||
-		string(tokens[1].text) != "---*" ||
-		string(tokens[2].text) != "*---" {
+		tokens[0].text.ToString() != "-*--*" ||
+		tokens[1].text.ToString() != "---*" ||
+		tokens[2].text.ToString() != "*---" {
 		t.Errorf("%s %d", tokens, len(tokens))
 	}
 }
@@ -123,14 +124,14 @@ func TestIrrelevantNth(t *testing.T) {
 }
 
 func TestParseKeys(t *testing.T) {
-	pairs := parseKeyChords("ctrl-z,alt-z,f2,@,Alt-a,!,ctrl-G,J,g", "")
+	pairs := parseKeyChords("ctrl-z,alt-z,f2,@,Alt-a,!,ctrl-G,J,g,ALT-enter,alt-SPACE", "")
 	check := func(i int, s string) {
 		if pairs[i] != s {
 			t.Errorf("%s != %s", pairs[i], s)
 		}
 	}
-	if len(pairs) != 9 {
-		t.Error(9)
+	if len(pairs) != 11 {
+		t.Error(11)
 	}
 	check(curses.CtrlZ, "ctrl-z")
 	check(curses.AltZ, "alt-z")
@@ -141,6 +142,8 @@ func TestParseKeys(t *testing.T) {
 	check(curses.CtrlA+'g'-'a', "ctrl-G")
 	check(curses.AltZ+'J', "J")
 	check(curses.AltZ+'g', "g")
+	check(curses.AltEnter, "ALT-enter")
+	check(curses.AltSpace, "alt-SPACE")
 
 	// Synonyms
 	pairs = parseKeyChords("enter,Return,space,tab,btab,esc,up,down,left,right", "")
@@ -339,7 +342,7 @@ func TestDefaultCtrlNP(t *testing.T) {
 	check([]string{"--bind=ctrl-n:accept"}, curses.CtrlN, actAccept)
 	check([]string{"--bind=ctrl-p:accept"}, curses.CtrlP, actAccept)
 
-	hist := "--history=/tmp/foo"
+	hist := "--history=/tmp/fzf-history"
 	check([]string{hist}, curses.CtrlN, actNextHistory)
 	check([]string{hist}, curses.CtrlP, actPreviousHistory)
 
@@ -350,14 +353,14 @@ func TestDefaultCtrlNP(t *testing.T) {
 	check([]string{hist, "--bind=ctrl-p:accept"}, curses.CtrlP, actAccept)
 }
 
-func TestToggle(t *testing.T) {
-	optsFor := func(words ...string) *Options {
-		opts := defaultOptions()
-		parseOptions(opts, words)
-		postProcessOptions(opts)
-		return opts
-	}
+func optsFor(words ...string) *Options {
+	opts := defaultOptions()
+	parseOptions(opts, words)
+	postProcessOptions(opts)
+	return opts
+}
 
+func TestToggle(t *testing.T) {
 	opts := optsFor()
 	if opts.ToggleSort {
 		t.Error()
@@ -373,3 +376,31 @@ func TestToggle(t *testing.T) {
 		t.Error()
 	}
 }
+
+func TestPreviewOpts(t *testing.T) {
+	opts := optsFor()
+	if !(opts.Preview.command == "" &&
+		opts.Preview.hidden == false &&
+		opts.Preview.position == posRight &&
+		opts.Preview.size.percent == true &&
+		opts.Preview.size.size == 50) {
+		t.Error()
+	}
+	opts = optsFor("--preview", "cat {}", "--preview-window=left:15:hidden")
+	if !(opts.Preview.command == "cat {}" &&
+		opts.Preview.hidden == true &&
+		opts.Preview.position == posLeft &&
+		opts.Preview.size.percent == false &&
+		opts.Preview.size.size == 15+2) {
+		t.Error(opts.Preview)
+	}
+
+	opts = optsFor("--preview-window=left:15:hidden", "--preview-window=down")
+	if !(opts.Preview.command == "" &&
+		opts.Preview.hidden == false &&
+		opts.Preview.position == posDown &&
+		opts.Preview.size.percent == true &&
+		opts.Preview.size.size == 50) {
+		t.Error(opts.Preview)
+	}
+}

src/pattern.go

@@ -2,7 +2,6 @@ package fzf
 
 import (
 	"regexp"
-	"sort"
 	"strings"
 
 	"github.com/junegunn/fzf/src/algo"
@@ -41,6 +40,7 @@ type termSet []term
 // Pattern represents search pattern
 type Pattern struct {
 	fuzzy         bool
+	fuzzyAlgo     algo.Algo
 	extended      bool
 	caseSensitive bool
 	forward       bool
@@ -49,7 +49,7 @@ type Pattern struct {
 	cacheable     bool
 	delimiter     Delimiter
 	nth           []Range
-	procFun       map[termType]func(bool, bool, []rune, []rune) (int, int)
+	procFun       map[termType]algo.Algo
 }
 
 var (
@@ -75,8 +75,8 @@ func clearChunkCache() {
 }
 
 // BuildPattern builds Pattern object from the given arguments
-func BuildPattern(fuzzy bool, extended bool, caseMode Case, forward bool,
-	nth []Range, delimiter Delimiter, runes []rune) *Pattern {
+func BuildPattern(fuzzy bool, fuzzyAlgo algo.Algo, extended bool, caseMode Case, forward bool,
+	cacheable bool, nth []Range, delimiter Delimiter, runes []rune) *Pattern {
 
 	var asString string
 	if extended {
@@ -90,7 +90,7 @@ func BuildPattern(fuzzy bool, extended bool, caseMode Case, forward bool,
 		return cached
 	}
 
-	caseSensitive, cacheable := true, true
+	caseSensitive := true
 	termSets := []termSet{}
 
 	if extended {
@@ -100,7 +100,7 @@ func BuildPattern(fuzzy bool, extended bool, caseMode Case, forward bool,
 			for idx, term := range termSet {
 				// If the query contains inverse search terms or OR operators,
 				// we cannot cache the search scope
-				if idx > 0 || term.inv {
+				if !cacheable || idx > 0 || term.inv {
 					cacheable = false
 					break Loop
 				}
@@ -117,6 +117,7 @@ func BuildPattern(fuzzy bool, extended bool, caseMode Case, forward bool,
 
 	ptr := &Pattern{
 		fuzzy:         fuzzy,
+		fuzzyAlgo:     fuzzyAlgo,
 		extended:      extended,
 		caseSensitive: caseSensitive,
 		forward:       forward,
@@ -125,9 +126,9 @@ func BuildPattern(fuzzy bool, extended bool, caseMode Case, forward bool,
 		cacheable:     cacheable,
 		nth:           nth,
 		delimiter:     delimiter,
-		procFun:       make(map[termType]func(bool, bool, []rune, []rune) (int, int))}
+		procFun:       make(map[termType]algo.Algo)}
 
-	ptr.procFun[termFuzzy] = algo.FuzzyMatch
+	ptr.procFun[termFuzzy] = fuzzyAlgo
 	ptr.procFun[termEqual] = algo.EqualMatch
 	ptr.procFun[termExact] = algo.ExactMatchNaive
 	ptr.procFun[termPrefix] = algo.PrefixMatch
@@ -162,12 +163,13 @@ func parseTerms(fuzzy bool, caseMode Case, str string) []termSet {
 
 		if strings.HasPrefix(text, "!") {
 			inv = true
+			typ = termExact
 			text = text[1:]
 		}
 
 		if strings.HasPrefix(text, "'") {
 			// Flip exactness
-			if fuzzy {
+			if fuzzy && !inv {
 				typ = termExact
 				text = text[1:]
 			} else {
@@ -227,7 +229,7 @@ func (p *Pattern) CacheKey() string {
 	}
 	cacheableTerms := []string{}
 	for _, termSet := range p.termSets {
-		if len(termSet) == 1 && !termSet[0].inv {
+		if len(termSet) == 1 && !termSet[0].inv && (p.fuzzy || termSet[0].typ == termExact) {
 			cacheableTerms = append(cacheableTerms, string(termSet[0].origText))
 		}
 	}
@@ -235,9 +237,7 @@ func (p *Pattern) CacheKey() string {
 }
 
 // Match returns the list of matches Items in the given Chunk
-func (p *Pattern) Match(chunk *Chunk) []*Item {
-	space := chunk
-
+func (p *Pattern) Match(chunk *Chunk, slab *util.Slab) []*Result {
 	// ChunkCache: Exact match
 	cacheKey := p.CacheKey()
 	if p.cacheable {
@@ -246,7 +246,8 @@ func (p *Pattern) Match(chunk *Chunk) []*Item {
 		}
 	}
 
-	// ChunkCache: Prefix/suffix match
+	// Prefix/suffix cache
+	var space []*Result
 Loop:
 	for idx := 1; idx < len(cacheKey); idx++ {
 		// [---------| ] | [ |---------]
@@ -256,14 +257,13 @@ Loop:
 		suffix := cacheKey[idx:]
 		for _, substr := range [2]*string{&prefix, &suffix} {
 			if cached, found := _cache.Find(chunk, *substr); found {
-				cachedChunk := Chunk(cached)
-				space = &cachedChunk
+				space = cached
 				break Loop
 			}
 		}
 	}
 
-	matches := p.matchChunk(space)
+	matches := p.matchChunk(chunk, space, slab)
 
 	if p.cacheable {
 		_cache.Add(chunk, cacheKey, matches)
@@ -271,19 +271,19 @@ Loop:
 	return matches
 }
 
-func (p *Pattern) matchChunk(chunk *Chunk) []*Item {
-	matches := []*Item{}
-	if !p.extended {
+func (p *Pattern) matchChunk(chunk *Chunk, space []*Result, slab *util.Slab) []*Result {
+	matches := []*Result{}
+
+	if space == nil {
 		for _, item := range *chunk {
-			if sidx, eidx, tlen := p.basicMatch(item); sidx >= 0 {
-				matches = append(matches,
-					dupItem(item, []Offset{Offset{int32(sidx), int32(eidx), int32(tlen)}}))
+			if match, _, _ := p.MatchItem(item, false, slab); match != nil {
+				matches = append(matches, match)
 			}
 		}
 	} else {
-		for _, item := range *chunk {
-			if offsets := p.extendedMatch(item); len(offsets) == len(p.termSets) {
-				matches = append(matches, dupItem(item, offsets))
+		for _, result := range space {
+			if match, _, _ := p.MatchItem(result.item, false, slab); match != nil {
+				matches = append(matches, match)
 			}
 		}
 	}
@@ -291,57 +291,75 @@ func (p *Pattern) matchChunk(chunk *Chunk) []*Item {
 }
 
 // MatchItem returns true if the Item is a match
-func (p *Pattern) MatchItem(item *Item) bool {
-	if !p.extended {
-		sidx, _, _ := p.basicMatch(item)
-		return sidx >= 0
+func (p *Pattern) MatchItem(item *Item, withPos bool, slab *util.Slab) (*Result, []Offset, *[]int) {
+	if p.extended {
+		if offsets, bonus, trimLen, pos := p.extendedMatch(item, withPos, slab); len(offsets) == len(p.termSets) {
+			return buildResult(item, offsets, bonus, trimLen), offsets, pos
+		}
+		return nil, nil, nil
 	}
-	offsets := p.extendedMatch(item)
-	return len(offsets) == len(p.termSets)
+	offset, bonus, trimLen, pos := p.basicMatch(item, withPos, slab)
+	if sidx := offset[0]; sidx >= 0 {
+		offsets := []Offset{offset}
+		return buildResult(item, offsets, bonus, trimLen), offsets, pos
+	}
+	return nil, nil, nil
 }
 
-func dupItem(item *Item, offsets []Offset) *Item {
-	sort.Sort(ByOrder(offsets))
-	return &Item{
-		text:        item.text,
-		origText:    item.origText,
-		transformed: item.transformed,
-		offsets:     offsets,
-		colors:      item.colors,
-		rank:        buildEmptyRank(item.Index())}
-}
-
-func (p *Pattern) basicMatch(item *Item) (int, int, int) {
+func (p *Pattern) basicMatch(item *Item, withPos bool, slab *util.Slab) (Offset, int, int, *[]int) {
 	input := p.prepareInput(item)
 	if p.fuzzy {
-		return p.iter(algo.FuzzyMatch, input, p.caseSensitive, p.forward, p.text)
+		return p.iter(p.fuzzyAlgo, input, p.caseSensitive, p.forward, p.text, withPos, slab)
 	}
-	return p.iter(algo.ExactMatchNaive, input, p.caseSensitive, p.forward, p.text)
+	return p.iter(algo.ExactMatchNaive, input, p.caseSensitive, p.forward, p.text, withPos, slab)
 }
 
-func (p *Pattern) extendedMatch(item *Item) []Offset {
+func (p *Pattern) extendedMatch(item *Item, withPos bool, slab *util.Slab) ([]Offset, int, int, *[]int) {
 	input := p.prepareInput(item)
 	offsets := []Offset{}
+	var totalScore int
+	var totalTrimLen int
+	var allPos *[]int
+	if withPos {
+		allPos = &[]int{}
+	}
 	for _, termSet := range p.termSets {
-		var offset *Offset
+		var offset Offset
+		var currentScore int
+		var trimLen int
+		matched := false
 		for _, term := range termSet {
 			pfun := p.procFun[term.typ]
-			if sidx, eidx, tlen := p.iter(pfun, input, term.caseSensitive, p.forward, term.text); sidx >= 0 {
+			off, score, tLen, pos := p.iter(pfun, input, term.caseSensitive, p.forward, term.text, withPos, slab)
+			if sidx := off[0]; sidx >= 0 {
 				if term.inv {
 					continue
 				}
-				offset = &Offset{int32(sidx), int32(eidx), int32(tlen)}
+				offset, currentScore, trimLen = off, score, tLen
+				matched = true
+				if withPos {
+					if pos != nil {
+						*allPos = append(*allPos, *pos...)
+					} else {
+						for idx := off[0]; idx < off[1]; idx++ {
+							*allPos = append(*allPos, int(idx))
+						}
+					}
+				}
 				break
 			} else if term.inv {
-				offset = &Offset{0, 0, 0}
+				offset, currentScore, trimLen = Offset{0, 0}, 0, 0
+				matched = true
 				continue
 			}
 		}
-		if offset != nil {
-			offsets = append(offsets, *offset)
+		if matched {
+			offsets = append(offsets, offset)
+			totalScore += currentScore
+			totalTrimLen += trimLen
 		}
 	}
-	return offsets
+	return offsets, totalScore, totalTrimLen, allPos
 }
 
 func (p *Pattern) prepareInput(item *Item) []Token {
@@ -350,23 +368,28 @@ func (p *Pattern) prepareInput(item *Item) []Token {
 	}
 
 	var ret []Token
-	if len(p.nth) > 0 {
+	if len(p.nth) == 0 {
+		ret = []Token{Token{text: &item.text, prefixLength: 0, trimLength: int32(item.text.TrimLength())}}
+	} else {
 		tokens := Tokenize(item.text, p.delimiter)
 		ret = Transform(tokens, p.nth)
-	} else {
-		ret = []Token{Token{text: item.text, prefixLength: 0, trimLength: util.TrimLen(item.text)}}
 	}
 	item.transformed = ret
 	return ret
 }
 
-func (p *Pattern) iter(pfun func(bool, bool, []rune, []rune) (int, int),
-	tokens []Token, caseSensitive bool, forward bool, pattern []rune) (int, int, int) {
+func (p *Pattern) iter(pfun algo.Algo, tokens []Token, caseSensitive bool, forward bool, pattern []rune, withPos bool, slab *util.Slab) (Offset, int, int, *[]int) {
 	for _, part := range tokens {
-		prefixLength := part.prefixLength
-		if sidx, eidx := pfun(caseSensitive, forward, part.text, pattern); sidx >= 0 {
-			return sidx + prefixLength, eidx + prefixLength, part.trimLength
+		if res, pos := pfun(caseSensitive, forward, *part.text, pattern, withPos, slab); res.Start >= 0 {
+			sidx := int32(res.Start) + part.prefixLength
+			eidx := int32(res.End) + part.prefixLength
+			if pos != nil {
+				for idx := range *pos {
+					(*pos)[idx] += int(part.prefixLength)
+				}
+			}
+			return Offset{sidx, eidx}, res.Score, int(part.trimLength), pos
 		}
 	}
-	return -1, -1, -1 // math.MaxUint16
+	return Offset{-1, -1}, 0, -1, nil
 }

src/pattern_test.go

@@ -5,8 +5,15 @@ import (
 	"testing"
 
 	"github.com/junegunn/fzf/src/algo"
+	"github.com/junegunn/fzf/src/util"
 )
 
+var slab *util.Slab
+
+func init() {
+	slab = util.MakeSlab(slab16Size, slab32Size)
+}
+
 func TestParseTermsExtended(t *testing.T) {
 	terms := parseTerms(true, CaseSmart,
 		"| aaa 'bbb ^ccc ddd$ !eee !'fff !^ggg !hhh$ | ^iii$ ^xxx | 'yyy | | zzz$ | !ZZZ |")
@@ -15,15 +22,15 @@ func TestParseTermsExtended(t *testing.T) {
 		terms[1][0].typ != termExact || terms[1][0].inv ||
 		terms[2][0].typ != termPrefix || terms[2][0].inv ||
 		terms[3][0].typ != termSuffix || terms[3][0].inv ||
-		terms[4][0].typ != termFuzzy || !terms[4][0].inv ||
-		terms[5][0].typ != termExact || !terms[5][0].inv ||
+		terms[4][0].typ != termExact || !terms[4][0].inv ||
+		terms[5][0].typ != termFuzzy || !terms[5][0].inv ||
 		terms[6][0].typ != termPrefix || !terms[6][0].inv ||
 		terms[7][0].typ != termSuffix || !terms[7][0].inv ||
 		terms[7][1].typ != termEqual || terms[7][1].inv ||
 		terms[8][0].typ != termPrefix || terms[8][0].inv ||
 		terms[8][1].typ != termExact || terms[8][1].inv ||
 		terms[8][2].typ != termSuffix || terms[8][2].inv ||
-		terms[8][3].typ != termFuzzy || !terms[8][3].inv {
+		terms[8][3].typ != termExact || !terms[8][3].inv {
 		t.Errorf("%s", terms)
 	}
 	for idx, termSet := range terms[:8] {
@@ -68,25 +75,31 @@ func TestParseTermsEmpty(t *testing.T) {
 func TestExact(t *testing.T) {
 	defer clearPatternCache()
 	clearPatternCache()
-	pattern := BuildPattern(true, true, CaseSmart, true,
+	pattern := BuildPattern(true, algo.FuzzyMatchV2, true, CaseSmart, true, true,
 		[]Range{}, Delimiter{}, []rune("'abc"))
-	sidx, eidx := algo.ExactMatchNaive(
-		pattern.caseSensitive, pattern.forward, []rune("aabbcc abc"), pattern.termSets[0][0].text)
-	if sidx != 7 || eidx != 10 {
-		t.Errorf("%s / %d / %d", pattern.termSets, sidx, eidx)
+	res, pos := algo.ExactMatchNaive(
+		pattern.caseSensitive, pattern.forward, util.RunesToChars([]rune("aabbcc abc")), pattern.termSets[0][0].text, true, nil)
+	if res.Start != 7 || res.End != 10 {
+		t.Errorf("%s / %d / %d", pattern.termSets, res.Start, res.End)
+	}
+	if pos != nil {
+		t.Errorf("pos is expected to be nil")
 	}
 }
 
 func TestEqual(t *testing.T) {
 	defer clearPatternCache()
 	clearPatternCache()
-	pattern := BuildPattern(true, true, CaseSmart, true, []Range{}, Delimiter{}, []rune("^AbC$"))
+	pattern := BuildPattern(true, algo.FuzzyMatchV2, true, CaseSmart, true, true, []Range{}, Delimiter{}, []rune("^AbC$"))
 
 	match := func(str string, sidxExpected int, eidxExpected int) {
-		sidx, eidx := algo.EqualMatch(
-			pattern.caseSensitive, pattern.forward, []rune(str), pattern.termSets[0][0].text)
-		if sidx != sidxExpected || eidx != eidxExpected {
-			t.Errorf("%s / %d / %d", pattern.termSets, sidx, eidx)
+		res, pos := algo.EqualMatch(
+			pattern.caseSensitive, pattern.forward, util.RunesToChars([]rune(str)), pattern.termSets[0][0].text, true, nil)
+		if res.Start != sidxExpected || res.End != eidxExpected {
+			t.Errorf("%s / %d / %d", pattern.termSets, res.Start, res.End)
+		}
+		if pos != nil {
+			t.Errorf("pos is expected to be nil")
 		}
 	}
 	match("ABC", -1, -1)
@@ -96,17 +109,17 @@ func TestEqual(t *testing.T) {
 func TestCaseSensitivity(t *testing.T) {
 	defer clearPatternCache()
 	clearPatternCache()
-	pat1 := BuildPattern(true, false, CaseSmart, true, []Range{}, Delimiter{}, []rune("abc"))
+	pat1 := BuildPattern(true, algo.FuzzyMatchV2, false, CaseSmart, true, true, []Range{}, Delimiter{}, []rune("abc"))
 	clearPatternCache()
-	pat2 := BuildPattern(true, false, CaseSmart, true, []Range{}, Delimiter{}, []rune("Abc"))
+	pat2 := BuildPattern(true, algo.FuzzyMatchV2, false, CaseSmart, true, true, []Range{}, Delimiter{}, []rune("Abc"))
 	clearPatternCache()
-	pat3 := BuildPattern(true, false, CaseIgnore, true, []Range{}, Delimiter{}, []rune("abc"))
+	pat3 := BuildPattern(true, algo.FuzzyMatchV2, false, CaseIgnore, true, true, []Range{}, Delimiter{}, []rune("abc"))
 	clearPatternCache()
-	pat4 := BuildPattern(true, false, CaseIgnore, true, []Range{}, Delimiter{}, []rune("Abc"))
+	pat4 := BuildPattern(true, algo.FuzzyMatchV2, false, CaseIgnore, true, true, []Range{}, Delimiter{}, []rune("Abc"))
 	clearPatternCache()
-	pat5 := BuildPattern(true, false, CaseRespect, true, []Range{}, Delimiter{}, []rune("abc"))
+	pat5 := BuildPattern(true, algo.FuzzyMatchV2, false, CaseRespect, true, true, []Range{}, Delimiter{}, []rune("abc"))
 	clearPatternCache()
-	pat6 := BuildPattern(true, false, CaseRespect, true, []Range{}, Delimiter{}, []rune("Abc"))
+	pat6 := BuildPattern(true, algo.FuzzyMatchV2, false, CaseRespect, true, true, []Range{}, Delimiter{}, []rune("Abc"))
 
 	if string(pat1.text) != "abc" || pat1.caseSensitive != false ||
 		string(pat2.text) != "Abc" || pat2.caseSensitive != true ||
@@ -119,31 +132,42 @@ func TestCaseSensitivity(t *testing.T) {
 }
 
 func TestOrigTextAndTransformed(t *testing.T) {
-	pattern := BuildPattern(true, true, CaseSmart, true, []Range{}, Delimiter{}, []rune("jg"))
-	tokens := Tokenize([]rune("junegunn"), Delimiter{})
+	pattern := BuildPattern(true, algo.FuzzyMatchV2, true, CaseSmart, true, true, []Range{}, Delimiter{}, []rune("jg"))
+	tokens := Tokenize(util.RunesToChars([]rune("junegunn")), Delimiter{})
 	trans := Transform(tokens, []Range{Range{1, 1}})
 
-	origRunes := []rune("junegunn.choi")
+	origBytes := []byte("junegunn.choi")
 	for _, extended := range []bool{false, true} {
 		chunk := Chunk{
 			&Item{
-				text:        []rune("junegunn"),
-				origText:    &origRunes,
+				text:        util.RunesToChars([]rune("junegunn")),
+				origText:    &origBytes,
 				transformed: trans},
 		}
 		pattern.extended = extended
-		matches := pattern.matchChunk(&chunk)
-		if string(matches[0].text) != "junegunn" || string(*matches[0].origText) != "junegunn.choi" ||
-			matches[0].offsets[0][0] != 0 || matches[0].offsets[0][1] != 5 ||
-			!reflect.DeepEqual(matches[0].transformed, trans) {
+		matches := pattern.matchChunk(&chunk, nil, slab) // No cache
+		if !(matches[0].item.text.ToString() == "junegunn" &&
+			string(*matches[0].item.origText) == "junegunn.choi" &&
+			reflect.DeepEqual(matches[0].item.transformed, trans)) {
 			t.Error("Invalid match result", matches)
 		}
+
+		match, offsets, pos := pattern.MatchItem(chunk[0], true, slab)
+		if !(match.item.text.ToString() == "junegunn" &&
+			string(*match.item.origText) == "junegunn.choi" &&
+			offsets[0][0] == 0 && offsets[0][1] == 5 &&
+			reflect.DeepEqual(match.item.transformed, trans)) {
+			t.Error("Invalid match result", match, offsets, extended)
+		}
+		if !((*pos)[0] == 4 && (*pos)[1] == 0) {
+			t.Error("Invalid pos array", *pos)
+		}
 	}
 }
 
 func TestCacheKey(t *testing.T) {
 	test := func(extended bool, patStr string, expected string, cacheable bool) {
-		pat := BuildPattern(true, extended, CaseSmart, true, []Range{}, Delimiter{}, []rune(patStr))
+		pat := BuildPattern(true, algo.FuzzyMatchV2, extended, CaseSmart, true, true, []Range{}, Delimiter{}, []rune(patStr))
 		if pat.CacheKey() != expected {
 			t.Errorf("Expected: %s, actual: %s", expected, pat.CacheKey())
 		}

src/reader.go

@@ -34,7 +34,7 @@ func (r *Reader) feed(src io.Reader) {
 	if r.delimNil {
 		delim = '\000'
 	}
-	reader := bufio.NewReader(src)
+	reader := bufio.NewReaderSize(src, readerBufferSize)
 	for {
 		// ReadBytes returns err != nil if and only if the returned data does not
 		// end in delim.

src/result.go

@@ -0,0 +1,241 @@
+package fzf
+
+import (
+	"math"
+	"sort"
+	"unicode"
+
+	"github.com/junegunn/fzf/src/curses"
+	"github.com/junegunn/fzf/src/util"
+)
+
+// Offset holds two 32-bit integers denoting the offsets of a matched substring
+type Offset [2]int32
+
+type colorOffset struct {
+	offset [2]int32
+	color  int
+	attr   curses.Attr
+	index  int32
+}
+
+type rank struct {
+	points [4]uint16
+	index  int32
+}
+
+type Result struct {
+	item *Item
+	rank rank
+}
+
+func buildResult(item *Item, offsets []Offset, score int, trimLen int) *Result {
+	if len(offsets) > 1 {
+		sort.Sort(ByOrder(offsets))
+	}
+
+	result := Result{item: item, rank: rank{index: item.index}}
+	numChars := item.text.Length()
+	minBegin := math.MaxUint16
+	maxEnd := 0
+	validOffsetFound := false
+	for _, offset := range offsets {
+		b, e := int(offset[0]), int(offset[1])
+		if b < e {
+			minBegin = util.Min(b, minBegin)
+			maxEnd = util.Max(e, maxEnd)
+			validOffsetFound = true
+		}
+	}
+
+	for idx, criterion := range sortCriteria {
+		val := uint16(math.MaxUint16)
+		switch criterion {
+		case byScore:
+			// Higher is better
+			val = math.MaxUint16 - util.AsUint16(score)
+		case byLength:
+			// If offsets is empty, trimLen will be 0, but we don't care
+			val = util.AsUint16(trimLen)
+		case byBegin:
+			if validOffsetFound {
+				whitePrefixLen := 0
+				for idx := 0; idx < numChars; idx++ {
+					r := item.text.Get(idx)
+					whitePrefixLen = idx
+					if idx == minBegin || !unicode.IsSpace(r) {
+						break
+					}
+				}
+				val = util.AsUint16(minBegin - whitePrefixLen)
+			}
+		case byEnd:
+			if validOffsetFound {
+				val = util.AsUint16(1 + numChars - maxEnd)
+			}
+		}
+		result.rank.points[idx] = val
+	}
+
+	return &result
+}
+
+// Sort criteria to use. Never changes once fzf is started.
+var sortCriteria []criterion
+
+// Index returns ordinal index of the Item
+func (result *Result) Index() int32 {
+	return result.item.index
+}
+
+func minRank() rank {
+	return rank{index: 0, points: [4]uint16{math.MaxUint16, 0, 0, 0}}
+}
+
+func (result *Result) colorOffsets(matchOffsets []Offset, color int, attr curses.Attr, current bool) []colorOffset {
+	itemColors := result.item.Colors()
+
+	if len(itemColors) == 0 {
+		var offsets []colorOffset
+		for _, off := range matchOffsets {
+
+			offsets = append(offsets, colorOffset{offset: [2]int32{off[0], off[1]}, color: color, attr: attr})
+		}
+		return offsets
+	}
+
+	// Find max column
+	var maxCol int32
+	for _, off := range matchOffsets {
+		if off[1] > maxCol {
+			maxCol = off[1]
+		}
+	}
+	for _, ansi := range itemColors {
+		if ansi.offset[1] > maxCol {
+			maxCol = ansi.offset[1]
+		}
+	}
+	cols := make([]int, maxCol)
+
+	for colorIndex, ansi := range itemColors {
+		for i := ansi.offset[0]; i < ansi.offset[1]; i++ {
+			cols[i] = colorIndex + 1 // XXX
+		}
+	}
+
+	for _, off := range matchOffsets {
+		for i := off[0]; i < off[1]; i++ {
+			cols[i] = -1
+		}
+	}
+
+	// sort.Sort(ByOrder(offsets))
+
+	// Merge offsets
+	// ------------  ----  --  ----
+	//   ++++++++      ++++++++++
+	// --++++++++--  --++++++++++---
+	curr := 0
+	start := 0
+	var colors []colorOffset
+	add := func(idx int) {
+		if curr != 0 && idx > start {
+			if curr == -1 {
+				colors = append(colors, colorOffset{
+					offset: [2]int32{int32(start), int32(idx)}, color: color, attr: attr})
+			} else {
+				ansi := itemColors[curr-1]
+				fg := ansi.color.fg
+				if fg == -1 {
+					if current {
+						fg = curses.CurrentFG
+					} else {
+						fg = curses.FG
+					}
+				}
+				bg := ansi.color.bg
+				if bg == -1 {
+					if current {
+						bg = curses.DarkBG
+					} else {
+						bg = curses.BG
+					}
+				}
+				colors = append(colors, colorOffset{
+					offset: [2]int32{int32(start), int32(idx)},
+					color:  curses.PairFor(fg, bg),
+					attr:   ansi.color.attr | attr})
+			}
+		}
+	}
+	for idx, col := range cols {
+		if col != curr {
+			add(idx)
+			start = idx
+			curr = col
+		}
+	}
+	add(int(maxCol))
+	return colors
+}
+
+// ByOrder is for sorting substring offsets
+type ByOrder []Offset
+
+func (a ByOrder) Len() int {
+	return len(a)
+}
+
+func (a ByOrder) Swap(i, j int) {
+	a[i], a[j] = a[j], a[i]
+}
+
+func (a ByOrder) Less(i, j int) bool {
+	ioff := a[i]
+	joff := a[j]
+	return (ioff[0] < joff[0]) || (ioff[0] == joff[0]) && (ioff[1] <= joff[1])
+}
+
+// ByRelevance is for sorting Items
+type ByRelevance []*Result
+
+func (a ByRelevance) Len() int {
+	return len(a)
+}
+
+func (a ByRelevance) Swap(i, j int) {
+	a[i], a[j] = a[j], a[i]
+}
+
+func (a ByRelevance) Less(i, j int) bool {
+	return compareRanks((*a[i]).rank, (*a[j]).rank, false)
+}
+
+// ByRelevanceTac is for sorting Items
+type ByRelevanceTac []*Result
+
+func (a ByRelevanceTac) Len() int {
+	return len(a)
+}
+
+func (a ByRelevanceTac) Swap(i, j int) {
+	a[i], a[j] = a[j], a[i]
+}
+
+func (a ByRelevanceTac) Less(i, j int) bool {
+	return compareRanks((*a[i]).rank, (*a[j]).rank, true)
+}
+
+func compareRanks(irank rank, jrank rank, tac bool) bool {
+	for idx := 0; idx < 4; idx++ {
+		left := irank.points[idx]
+		right := jrank.points[idx]
+		if left < right {
+			return true
+		} else if left > right {
+			return false
+		}
+	}
+	return (irank.index <= jrank.index) != tac
+}

src/result_test.go

@@ -0,0 +1,123 @@
+package fzf
+
+import (
+	"math"
+	"sort"
+	"testing"
+
+	"github.com/junegunn/fzf/src/curses"
+	"github.com/junegunn/fzf/src/util"
+)
+
+func TestOffsetSort(t *testing.T) {
+	offsets := []Offset{
+		Offset{3, 5}, Offset{2, 7},
+		Offset{1, 3}, Offset{2, 9}}
+	sort.Sort(ByOrder(offsets))
+
+	if offsets[0][0] != 1 || offsets[0][1] != 3 ||
+		offsets[1][0] != 2 || offsets[1][1] != 7 ||
+		offsets[2][0] != 2 || offsets[2][1] != 9 ||
+		offsets[3][0] != 3 || offsets[3][1] != 5 {
+		t.Error("Invalid order:", offsets)
+	}
+}
+
+func TestRankComparison(t *testing.T) {
+	rank := func(vals ...uint16) rank {
+		return rank{
+			points: [4]uint16{vals[0], vals[1], vals[2], vals[3]},
+			index:  int32(vals[4])}
+	}
+	if compareRanks(rank(3, 0, 0, 0, 5), rank(2, 0, 0, 0, 7), false) ||
+		!compareRanks(rank(3, 0, 0, 0, 5), rank(3, 0, 0, 0, 6), false) ||
+		!compareRanks(rank(1, 2, 0, 0, 3), rank(1, 3, 0, 0, 2), false) ||
+		!compareRanks(rank(0, 0, 0, 0, 0), rank(0, 0, 0, 0, 0), false) {
+		t.Error("Invalid order")
+	}
+
+	if compareRanks(rank(3, 0, 0, 0, 5), rank(2, 0, 0, 0, 7), true) ||
+		!compareRanks(rank(3, 0, 0, 0, 5), rank(3, 0, 0, 0, 6), false) ||
+		!compareRanks(rank(1, 2, 0, 0, 3), rank(1, 3, 0, 0, 2), true) ||
+		!compareRanks(rank(0, 0, 0, 0, 0), rank(0, 0, 0, 0, 0), false) {
+		t.Error("Invalid order (tac)")
+	}
+}
+
+// Match length, string length, index
+func TestResultRank(t *testing.T) {
+	// FIXME global
+	sortCriteria = []criterion{byScore, byLength}
+
+	strs := [][]rune{[]rune("foo"), []rune("foobar"), []rune("bar"), []rune("baz")}
+	item1 := buildResult(&Item{text: util.RunesToChars(strs[0]), index: 1}, []Offset{}, 2, 3)
+	if item1.rank.points[0] != math.MaxUint16-2 || // Bonus
+		item1.rank.points[1] != 3 || // Length
+		item1.rank.points[2] != 0 || // Unused
+		item1.rank.points[3] != 0 || // Unused
+		item1.item.index != 1 {
+		t.Error(item1.rank)
+	}
+	// Only differ in index
+	item2 := buildResult(&Item{text: util.RunesToChars(strs[0])}, []Offset{}, 2, 3)
+
+	items := []*Result{item1, item2}
+	sort.Sort(ByRelevance(items))
+	if items[0] != item2 || items[1] != item1 {
+		t.Error(items)
+	}
+
+	items = []*Result{item2, item1, item1, item2}
+	sort.Sort(ByRelevance(items))
+	if items[0] != item2 || items[1] != item2 ||
+		items[2] != item1 || items[3] != item1 {
+		t.Error(items, item1, item1.item.index, item2, item2.item.index)
+	}
+
+	// Sort by relevance
+	item3 := buildResult(&Item{index: 2}, []Offset{Offset{1, 3}, Offset{5, 7}}, 3, 0)
+	item4 := buildResult(&Item{index: 2}, []Offset{Offset{1, 2}, Offset{6, 7}}, 4, 0)
+	item5 := buildResult(&Item{index: 2}, []Offset{Offset{1, 3}, Offset{5, 7}}, 5, 0)
+	item6 := buildResult(&Item{index: 2}, []Offset{Offset{1, 2}, Offset{6, 7}}, 6, 0)
+	items = []*Result{item1, item2, item3, item4, item5, item6}
+	sort.Sort(ByRelevance(items))
+	if !(items[0] == item6 && items[1] == item5 &&
+		items[2] == item4 && items[3] == item3 &&
+		items[4] == item2 && items[5] == item1) {
+		t.Error(items, item1, item2, item3, item4, item5, item6)
+	}
+}
+
+func TestColorOffset(t *testing.T) {
+	// ------------ 20 ----  --  ----
+	//   ++++++++        ++++++++++
+	// --++++++++--    --++++++++++---
+
+	offsets := []Offset{Offset{5, 15}, Offset{25, 35}}
+	item := Result{
+		item: &Item{
+			colors: &[]ansiOffset{
+				ansiOffset{[2]int32{0, 20}, ansiState{1, 5, 0}},
+				ansiOffset{[2]int32{22, 27}, ansiState{2, 6, curses.Bold}},
+				ansiOffset{[2]int32{30, 32}, ansiState{3, 7, 0}},
+				ansiOffset{[2]int32{33, 40}, ansiState{4, 8, curses.Bold}}}}}
+	// [{[0 5] 9 false} {[5 15] 99 false} {[15 20] 9 false} {[22 25] 10 true} {[25 35] 99 false} {[35 40] 11 true}]
+
+	colors := item.colorOffsets(offsets, 99, 0, true)
+	assert := func(idx int, b int32, e int32, c int, bold bool) {
+		var attr curses.Attr
+		if bold {
+			attr = curses.Bold
+		}
+		o := colors[idx]
+		if o.offset[0] != b || o.offset[1] != e || o.color != c || o.attr != attr {
+			t.Error(o)
+		}
+	}
+	assert(0, 0, 5, curses.ColUser, false)
+	assert(1, 5, 15, 99, false)
+	assert(2, 15, 20, curses.ColUser, false)
+	assert(3, 22, 25, curses.ColUser+1, true)
+	assert(4, 25, 35, 99, false)
+	assert(5, 35, 40, curses.ColUser+2, true)
+}

src/terminal_test.go

@@ -0,0 +1,73 @@
+package fzf
+
+import (
+	"regexp"
+	"testing"
+
+	"github.com/junegunn/fzf/src/util"
+)
+
+func newItem(str string) *Item {
+	bytes := []byte(str)
+	trimmed, _, _ := extractColor(str, nil, nil)
+	return &Item{origText: &bytes, text: util.RunesToChars([]rune(trimmed))}
+}
+
+func TestReplacePlaceholder(t *testing.T) {
+	items1 := []*Item{newItem("  foo'bar \x1b[31mbaz\x1b[m")}
+	items2 := []*Item{
+		newItem("foo'bar \x1b[31mbaz\x1b[m"),
+		newItem("FOO'BAR \x1b[31mBAZ\x1b[m")}
+
+	var result string
+	check := func(expected string) {
+		if result != expected {
+			t.Errorf("expected: %s, actual: %s", expected, result)
+		}
+	}
+
+	// {}, preserve ansi
+	result = replacePlaceholder("echo {}", false, Delimiter{}, "query", items1)
+	check("echo '  foo'\\''bar \x1b[31mbaz\x1b[m'")
+
+	// {}, strip ansi
+	result = replacePlaceholder("echo {}", true, Delimiter{}, "query", items1)
+	check("echo '  foo'\\''bar baz'")
+
+	// {}, with multiple items
+	result = replacePlaceholder("echo {}", true, Delimiter{}, "query", items2)
+	check("echo 'foo'\\''bar baz' 'FOO'\\''BAR BAZ'")
+
+	// {..}, strip leading whitespaces, preserve ansi
+	result = replacePlaceholder("echo {..}", false, Delimiter{}, "query", items1)
+	check("echo 'foo'\\''bar \x1b[31mbaz\x1b[m'")
+
+	// {..}, strip leading whitespaces, strip ansi
+	result = replacePlaceholder("echo {..}", true, Delimiter{}, "query", items1)
+	check("echo 'foo'\\''bar baz'")
+
+	// {q}
+	result = replacePlaceholder("echo {} {q}", true, Delimiter{}, "query", items1)
+	check("echo '  foo'\\''bar baz' 'query'")
+
+	// {q}, multiple items
+	result = replacePlaceholder("echo {}{q}{}", true, Delimiter{}, "query 'string'", items2)
+	check("echo 'foo'\\''bar baz' 'FOO'\\''BAR BAZ''query '\\''string'\\''''foo'\\''bar baz' 'FOO'\\''BAR BAZ'")
+
+	result = replacePlaceholder("echo {1}/{2}/{2,1}/{-1}/{-2}/{}/{..}/{n.t}/\\{}/\\{1}/\\{q}/{3}", true, Delimiter{}, "query", items1)
+	check("echo 'foo'\\''bar'/'baz'/'bazfoo'\\''bar'/'baz'/'foo'\\''bar'/'  foo'\\''bar baz'/'foo'\\''bar baz'/{n.t}/{}/{1}/{q}/''")
+
+	result = replacePlaceholder("echo {1}/{2}/{-1}/{-2}/{..}/{n.t}/\\{}/\\{1}/\\{q}/{3}", true, Delimiter{}, "query", items2)
+	check("echo 'foo'\\''bar' 'FOO'\\''BAR'/'baz' 'BAZ'/'baz' 'BAZ'/'foo'\\''bar' 'FOO'\\''BAR'/'foo'\\''bar baz' 'FOO'\\''BAR BAZ'/{n.t}/{}/{1}/{q}/'' ''")
+
+	// String delimiter
+	delim := "'"
+	result = replacePlaceholder("echo {}/{1}/{2}", true, Delimiter{str: &delim}, "query", items1)
+	check("echo '  foo'\\''bar baz'/'foo'/'bar baz'")
+
+	// Regex delimiter
+	regex := regexp.MustCompile("[oa]+")
+	// foo'bar baz
+	result = replacePlaceholder("echo {}/{1}/{3}/{2..3}", true, Delimiter{regex: regex}, "query", items1)
+	check("echo '  foo'\\''bar baz'/'f'/'r b'/''\\''bar b'")
+}

src/tokenizer.go

@@ -18,9 +18,9 @@ type Range struct {
 
 // Token contains the tokenized part of the strings and its prefix length
 type Token struct {
-	text         []rune
-	prefixLength int
-	trimLength   int
+	text         *util.Chars
+	prefixLength int32
+	trimLength   int32
 }
 
 // Delimiter for tokenizing the input
@@ -75,15 +75,14 @@ func ParseRange(str *string) (Range, bool) {
 	return newRange(n, n), true
 }
 
-func withPrefixLengths(tokens [][]rune, begin int) []Token {
+func withPrefixLengths(tokens []util.Chars, begin int) []Token {
 	ret := make([]Token, len(tokens))
 
 	prefixLength := begin
 	for idx, token := range tokens {
-		// Need to define a new local variable instead of the reused token to take
-		// the pointer to it
-		ret[idx] = Token{token, prefixLength, util.TrimLen(token)}
-		prefixLength += len(token)
+		// NOTE: &tokens[idx] instead of &tokens
+		ret[idx] = Token{&tokens[idx], int32(prefixLength), int32(token.TrimLength())}
+		prefixLength += token.Length()
 	}
 	return ret
 }
@@ -94,59 +93,60 @@ const (
 	awkWhite
 )
 
-func awkTokenizer(input []rune) ([][]rune, int) {
+func awkTokenizer(input util.Chars) ([]util.Chars, int) {
 	// 9, 32
-	ret := [][]rune{}
-	str := []rune{}
+	ret := []util.Chars{}
 	prefixLength := 0
 	state := awkNil
-	for _, r := range input {
+	numChars := input.Length()
+	begin := 0
+	end := 0
+	for idx := 0; idx < numChars; idx++ {
+		r := input.Get(idx)
 		white := r == 9 || r == 32
 		switch state {
 		case awkNil:
 			if white {
 				prefixLength++
 			} else {
-				state = awkBlack
-				str = append(str, r)
+				state, begin, end = awkBlack, idx, idx+1
 			}
 		case awkBlack:
-			str = append(str, r)
+			end = idx + 1
 			if white {
 				state = awkWhite
 			}
 		case awkWhite:
 			if white {
-				str = append(str, r)
+				end = idx + 1
 			} else {
-				ret = append(ret, str)
-				state = awkBlack
-				str = []rune{r}
+				ret = append(ret, input.Slice(begin, end))
+				state, begin, end = awkBlack, idx, idx+1
 			}
 		}
 	}
-	if len(str) > 0 {
-		ret = append(ret, str)
+	if begin < end {
+		ret = append(ret, input.Slice(begin, end))
 	}
 	return ret, prefixLength
 }
 
 // Tokenize tokenizes the given string with the delimiter
-func Tokenize(runes []rune, delimiter Delimiter) []Token {
+func Tokenize(text util.Chars, delimiter Delimiter) []Token {
 	if delimiter.str == nil && delimiter.regex == nil {
 		// AWK-style (\S+\s*)
-		tokens, prefixLength := awkTokenizer(runes)
+		tokens, prefixLength := awkTokenizer(text)
 		return withPrefixLengths(tokens, prefixLength)
 	}
 
-	var tokens []string
 	if delimiter.str != nil {
-		tokens = strings.Split(string(runes), *delimiter.str)
-		for i := 0; i < len(tokens)-1; i++ {
-			tokens[i] = tokens[i] + *delimiter.str
-		}
-	} else if delimiter.regex != nil {
-		str := string(runes)
+		return withPrefixLengths(text.Split(*delimiter.str), 0)
+	}
+
+	// FIXME performance
+	var tokens []string
+	if delimiter.regex != nil {
+		str := text.ToString()
 		for len(str) > 0 {
 			loc := delimiter.regex.FindStringIndex(str)
 			if loc == nil {
@@ -157,9 +157,9 @@ func Tokenize(runes []rune, delimiter Delimiter) []Token {
 			str = str[last:]
 		}
 	}
-	asRunes := make([][]rune, len(tokens))
+	asRunes := make([]util.Chars, len(tokens))
 	for i, token := range tokens {
-		asRunes[i] = []rune(token)
+		asRunes[i] = util.RunesToChars([]rune(token))
 	}
 	return withPrefixLengths(asRunes, 0)
 }
@@ -167,15 +167,7 @@ func Tokenize(runes []rune, delimiter Delimiter) []Token {
 func joinTokens(tokens []Token) []rune {
 	ret := []rune{}
 	for _, token := range tokens {
-		ret = append(ret, token.text...)
-	}
-	return ret
-}
-
-func joinTokensAsRunes(tokens []Token) []rune {
-	ret := []rune{}
-	for _, token := range tokens {
-		ret = append(ret, token.text...)
+		ret = append(ret, token.text.ToRunes()...)
 	}
 	return ret
 }
@@ -185,19 +177,20 @@ func Transform(tokens []Token, withNth []Range) []Token {
 	transTokens := make([]Token, len(withNth))
 	numTokens := len(tokens)
 	for idx, r := range withNth {
-		part := []rune{}
+		parts := []*util.Chars{}
 		minIdx := 0
 		if r.begin == r.end {
 			idx := r.begin
 			if idx == rangeEllipsis {
-				part = append(part, joinTokensAsRunes(tokens)...)
+				chars := util.RunesToChars(joinTokens(tokens))
+				parts = append(parts, &chars)
 			} else {
 				if idx < 0 {
 					idx += numTokens + 1
 				}
 				if idx >= 1 && idx <= numTokens {
 					minIdx = idx - 1
-					part = append(part, tokens[idx-1].text...)
+					parts = append(parts, tokens[idx-1].text)
 				}
 			}
 		} else {
@@ -224,17 +217,32 @@ func Transform(tokens []Token, withNth []Range) []Token {
 			minIdx = util.Max(0, begin-1)
 			for idx := begin; idx <= end; idx++ {
 				if idx >= 1 && idx <= numTokens {
-					part = append(part, tokens[idx-1].text...)
+					parts = append(parts, tokens[idx-1].text)
 				}
 			}
 		}
-		var prefixLength int
+		// Merge multiple parts
+		var merged util.Chars
+		switch len(parts) {
+		case 0:
+			merged = util.RunesToChars([]rune{})
+		case 1:
+			merged = *parts[0]
+		default:
+			runes := []rune{}
+			for _, part := range parts {
+				runes = append(runes, part.ToRunes()...)
+			}
+			merged = util.RunesToChars(runes)
+		}
+
+		var prefixLength int32
 		if minIdx < numTokens {
 			prefixLength = tokens[minIdx].prefixLength
 		} else {
 			prefixLength = 0
 		}
-		transTokens[idx] = Token{part, prefixLength, util.TrimLen(part)}
+		transTokens[idx] = Token{&merged, prefixLength, int32(merged.TrimLength())}
 	}
 	return transTokens
 }

src/tokenizer_test.go

@@ -1,6 +1,10 @@
 package fzf
 
-import "testing"
+import (
+	"testing"
+
+	"github.com/junegunn/fzf/src/util"
+)
 
 func TestParseRange(t *testing.T) {
 	{
@@ -43,23 +47,23 @@ func TestParseRange(t *testing.T) {
 func TestTokenize(t *testing.T) {
 	// AWK-style
 	input := "  abc:  def:  ghi  "
-	tokens := Tokenize([]rune(input), Delimiter{})
-	if string(tokens[0].text) != "abc:  " || tokens[0].prefixLength != 2 || tokens[0].trimLength != 4 {
+	tokens := Tokenize(util.RunesToChars([]rune(input)), Delimiter{})
+	if tokens[0].text.ToString() != "abc:  " || tokens[0].prefixLength != 2 || tokens[0].trimLength != 4 {
 		t.Errorf("%s", tokens)
 	}
 
 	// With delimiter
-	tokens = Tokenize([]rune(input), delimiterRegexp(":"))
-	if string(tokens[0].text) != "  abc:" || tokens[0].prefixLength != 0 || tokens[0].trimLength != 4 {
+	tokens = Tokenize(util.RunesToChars([]rune(input)), delimiterRegexp(":"))
+	if tokens[0].text.ToString() != "  abc:" || tokens[0].prefixLength != 0 || tokens[0].trimLength != 4 {
 		t.Errorf("%s", tokens)
 	}
 
 	// With delimiter regex
-	tokens = Tokenize([]rune(input), delimiterRegexp("\\s+"))
-	if string(tokens[0].text) != "  " || tokens[0].prefixLength != 0 || tokens[0].trimLength != 0 ||
-		string(tokens[1].text) != "abc:  " || tokens[1].prefixLength != 2 || tokens[1].trimLength != 4 ||
-		string(tokens[2].text) != "def:  " || tokens[2].prefixLength != 8 || tokens[2].trimLength != 4 ||
-		string(tokens[3].text) != "ghi  " || tokens[3].prefixLength != 14 || tokens[3].trimLength != 3 {
+	tokens = Tokenize(util.RunesToChars([]rune(input)), delimiterRegexp("\\s+"))
+	if tokens[0].text.ToString() != "  " || tokens[0].prefixLength != 0 || tokens[0].trimLength != 0 ||
+		tokens[1].text.ToString() != "abc:  " || tokens[1].prefixLength != 2 || tokens[1].trimLength != 4 ||
+		tokens[2].text.ToString() != "def:  " || tokens[2].prefixLength != 8 || tokens[2].trimLength != 4 ||
+		tokens[3].text.ToString() != "ghi  " || tokens[3].prefixLength != 14 || tokens[3].trimLength != 3 {
 		t.Errorf("%s", tokens)
 	}
 }
@@ -67,7 +71,7 @@ func TestTokenize(t *testing.T) {
 func TestTransform(t *testing.T) {
 	input := "  abc:  def:  ghi:  jkl"
 	{
-		tokens := Tokenize([]rune(input), Delimiter{})
+		tokens := Tokenize(util.RunesToChars([]rune(input)), Delimiter{})
 		{
 			ranges := splitNth("1,2,3")
 			tx := Transform(tokens, ranges)
@@ -80,25 +84,25 @@ func TestTransform(t *testing.T) {
 			tx := Transform(tokens, ranges)
 			if string(joinTokens(tx)) != "abc:  def:  ghi:  def:  ghi:  jklabc:  " ||
 				len(tx) != 4 ||
-				string(tx[0].text) != "abc:  def:  " || tx[0].prefixLength != 2 ||
-				string(tx[1].text) != "ghi:  " || tx[1].prefixLength != 14 ||
-				string(tx[2].text) != "def:  ghi:  jkl" || tx[2].prefixLength != 8 ||
-				string(tx[3].text) != "abc:  " || tx[3].prefixLength != 2 {
+				tx[0].text.ToString() != "abc:  def:  " || tx[0].prefixLength != 2 ||
+				tx[1].text.ToString() != "ghi:  " || tx[1].prefixLength != 14 ||
+				tx[2].text.ToString() != "def:  ghi:  jkl" || tx[2].prefixLength != 8 ||
+				tx[3].text.ToString() != "abc:  " || tx[3].prefixLength != 2 {
 				t.Errorf("%s", tx)
 			}
 		}
 	}
 	{
-		tokens := Tokenize([]rune(input), delimiterRegexp(":"))
+		tokens := Tokenize(util.RunesToChars([]rune(input)), delimiterRegexp(":"))
 		{
 			ranges := splitNth("1..2,3,2..,1")
 			tx := Transform(tokens, ranges)
 			if string(joinTokens(tx)) != "  abc:  def:  ghi:  def:  ghi:  jkl  abc:" ||
 				len(tx) != 4 ||
-				string(tx[0].text) != "  abc:  def:" || tx[0].prefixLength != 0 ||
-				string(tx[1].text) != "  ghi:" || tx[1].prefixLength != 12 ||
-				string(tx[2].text) != "  def:  ghi:  jkl" || tx[2].prefixLength != 6 ||
-				string(tx[3].text) != "  abc:" || tx[3].prefixLength != 0 {
+				tx[0].text.ToString() != "  abc:  def:" || tx[0].prefixLength != 0 ||
+				tx[1].text.ToString() != "  ghi:" || tx[1].prefixLength != 12 ||
+				tx[2].text.ToString() != "  def:  ghi:  jkl" || tx[2].prefixLength != 6 ||
+				tx[3].text.ToString() != "  abc:" || tx[3].prefixLength != 0 {
 				t.Errorf("%s", tx)
 			}
 		}

src/update_assets.rb

@@ -2,6 +2,7 @@
 
 # http://www.rubydoc.info/github/rest-client/rest-client/RestClient
 require 'rest_client'
+require 'json'
 
 if ARGV.length < 3
   puts "usage: #$0 <token> <version> <files...>"

src/util/chars.go

@@ -0,0 +1,157 @@
+package util
+
+import (
+	"unicode"
+	"unicode/utf8"
+)
+
+type Chars struct {
+	runes []rune
+	bytes []byte
+}
+
+// ToChars converts byte array into rune array
+func ToChars(bytea []byte) Chars {
+	var runes []rune
+	ascii := true
+	numBytes := len(bytea)
+	for i := 0; i < numBytes; {
+		if bytea[i] < utf8.RuneSelf {
+			if !ascii {
+				runes = append(runes, rune(bytea[i]))
+			}
+			i++
+		} else {
+			if ascii {
+				ascii = false
+				runes = make([]rune, i, numBytes)
+				for j := 0; j < i; j++ {
+					runes[j] = rune(bytea[j])
+				}
+			}
+			r, sz := utf8.DecodeRune(bytea[i:])
+			i += sz
+			runes = append(runes, r)
+		}
+	}
+	if ascii {
+		return Chars{bytes: bytea}
+	}
+	return Chars{runes: runes}
+}
+
+func RunesToChars(runes []rune) Chars {
+	return Chars{runes: runes}
+}
+
+func (chars *Chars) Get(i int) rune {
+	if chars.runes != nil {
+		return chars.runes[i]
+	}
+	return rune(chars.bytes[i])
+}
+
+func (chars *Chars) Length() int {
+	if chars.runes != nil {
+		return len(chars.runes)
+	}
+	return len(chars.bytes)
+}
+
+// TrimLength returns the length after trimming leading and trailing whitespaces
+func (chars *Chars) TrimLength() int {
+	var i int
+	len := chars.Length()
+	for i = len - 1; i >= 0; i-- {
+		char := chars.Get(i)
+		if !unicode.IsSpace(char) {
+			break
+		}
+	}
+	// Completely empty
+	if i < 0 {
+		return 0
+	}
+
+	var j int
+	for j = 0; j < len; j++ {
+		char := chars.Get(j)
+		if !unicode.IsSpace(char) {
+			break
+		}
+	}
+	return i - j + 1
+}
+
+func (chars *Chars) TrailingWhitespaces() int {
+	whitespaces := 0
+	for i := chars.Length() - 1; i >= 0; i-- {
+		char := chars.Get(i)
+		if !unicode.IsSpace(char) {
+			break
+		}
+		whitespaces++
+	}
+	return whitespaces
+}
+
+func (chars *Chars) ToString() string {
+	if chars.runes != nil {
+		return string(chars.runes)
+	}
+	return string(chars.bytes)
+}
+
+func (chars *Chars) ToRunes() []rune {
+	if chars.runes != nil {
+		return chars.runes
+	}
+	runes := make([]rune, len(chars.bytes))
+	for idx, b := range chars.bytes {
+		runes[idx] = rune(b)
+	}
+	return runes
+}
+
+func (chars *Chars) Slice(b int, e int) Chars {
+	if chars.runes != nil {
+		return Chars{runes: chars.runes[b:e]}
+	}
+	return Chars{bytes: chars.bytes[b:e]}
+}
+
+func (chars *Chars) Split(delimiter string) []Chars {
+	delim := []rune(delimiter)
+	numChars := chars.Length()
+	numDelim := len(delim)
+	begin := 0
+	ret := make([]Chars, 0, 1)
+
+	for index := 0; index < numChars; {
+		if index+numDelim <= numChars {
+			match := true
+			for off, d := range delim {
+				if chars.Get(index+off) != d {
+					match = false
+					break
+				}
+			}
+			// Found the delimiter
+			if match {
+				incr := Max(numDelim, 1)
+				ret = append(ret, chars.Slice(begin, index+incr))
+				index += incr
+				begin = index
+				continue
+			}
+		} else {
+			// Impossible to find the delimiter in the remaining substring
+			break
+		}
+		index++
+	}
+	if begin < numChars || len(ret) == 0 {
+		ret = append(ret, chars.Slice(begin, numChars))
+	}
+	return ret
+}

src/util/chars_test.go

@@ -0,0 +1,82 @@
+package util
+
+import "testing"
+
+func TestToCharsNil(t *testing.T) {
+	bs := Chars{bytes: []byte{}}
+	if bs.bytes == nil || bs.runes != nil {
+		t.Error()
+	}
+	rs := RunesToChars([]rune{})
+	if rs.bytes != nil || rs.runes == nil {
+		t.Error()
+	}
+}
+
+func TestToCharsAscii(t *testing.T) {
+	chars := ToChars([]byte("foobar"))
+	if chars.ToString() != "foobar" || chars.runes != nil {
+		t.Error()
+	}
+}
+
+func TestCharsLength(t *testing.T) {
+	chars := ToChars([]byte("\tabc한글  "))
+	if chars.Length() != 8 || chars.TrimLength() != 5 {
+		t.Error()
+	}
+}
+
+func TestCharsToString(t *testing.T) {
+	text := "\tabc한글  "
+	chars := ToChars([]byte(text))
+	if chars.ToString() != text {
+		t.Error()
+	}
+}
+
+func TestTrimLength(t *testing.T) {
+	check := func(str string, exp int) {
+		chars := ToChars([]byte(str))
+		trimmed := chars.TrimLength()
+		if trimmed != exp {
+			t.Errorf("Invalid TrimLength result for '%s': %d (expected %d)",
+				str, trimmed, exp)
+		}
+	}
+	check("hello", 5)
+	check("hello ", 5)
+	check("hello  ", 5)
+	check(" hello", 5)
+	check("  hello", 5)
+	check(" hello ", 5)
+	check("  hello  ", 5)
+	check("h   o", 5)
+	check("  h   o  ", 5)
+	check("         ", 0)
+}
+
+func TestSplit(t *testing.T) {
+	check := func(str string, delim string, tokens ...string) {
+		input := ToChars([]byte(str))
+		result := input.Split(delim)
+		if len(result) != len(tokens) {
+			t.Errorf("Invalid Split result for '%s': %d tokens found (expected %d): %s",
+				str, len(result), len(tokens), result)
+		}
+		for idx, token := range tokens {
+			if result[idx].ToString() != token {
+				t.Errorf("Invalid Split result for '%s': %s (expected %s)",
+					str, result[idx].ToString(), token)
+			}
+		}
+	}
+	check("abc:def::", ":", "abc:", "def:", ":")
+	check("abc:def::", "-", "abc:def::")
+	check("abc", "", "a", "b", "c")
+	check("abc", "a", "a", "bc")
+	check("abc", "ab", "ab", "c")
+	check("abc", "abc", "abc")
+	check("abc", "abcd", "abc")
+	check("", "abcd", "")
+}

src/util/slab.go

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

src/util/util.go

@@ -4,21 +4,34 @@ package util
 import "C"
 
 import (
+	"math"
 	"os"
 	"os/exec"
 	"time"
-	"unicode/utf8"
 )
 
 // Max returns the largest integer
-func Max(first int, items ...int) int {
-	max := first
-	for _, item := range items {
-		if item > max {
-			max = item
-		}
+func Max(first int, second int) int {
+	if first >= second {
+		return first
 	}
-	return max
+	return second
+}
+
+// Max16 returns the largest integer
+func Max16(first int16, second int16) int16 {
+	if first >= second {
+		return first
+	}
+	return second
+}
+
+// Max32 returns the largest 32-bit integer
+func Max32(first int32, second int32) int32 {
+	if first > second {
+		return first
+	}
+	return second
 }
 
 // Min returns the smallest integer
@@ -37,14 +50,6 @@ func Min32(first int32, second int32) int32 {
 	return second
 }
 
-// Max32 returns the largest 32-bit integer
-func Max32(first int32, second int32) int32 {
-	if first > second {
-		return first
-	}
-	return second
-}
-
 // Constrain32 limits the given 32-bit integer with the upper and lower bounds
 func Constrain32(val int32, min int32, max int32) int32 {
 	if val < min {
@@ -67,6 +72,15 @@ func Constrain(val int, min int, max int) int {
 	return val
 }
 
+func AsUint16(val int) uint16 {
+	if val > math.MaxUint16 {
+		return math.MaxUint16
+	} else if val < 0 {
+		return 0
+	}
+	return uint16(val)
+}
+
 // DurWithin limits the given time.Duration with the upper and lower bounds
 func DurWithin(
 	val time.Duration, min time.Duration, max time.Duration) time.Duration {
@@ -84,58 +98,6 @@ func IsTty() bool {
 	return int(C.isatty(C.int(os.Stdin.Fd()))) != 0
 }
 
-// TrimRight returns rune array with trailing white spaces cut off
-func TrimRight(runes []rune) []rune {
-	var i int
-	for i = len(runes) - 1; i >= 0; i-- {
-		char := runes[i]
-		if char != ' ' && char != '\t' {
-			break
-		}
-	}
-	return runes[0 : i+1]
-}
-
-// BytesToRunes converts byte array into rune array
-func BytesToRunes(bytea []byte) []rune {
-	runes := make([]rune, 0, len(bytea))
-	for i := 0; i < len(bytea); {
-		if bytea[i] < utf8.RuneSelf {
-			runes = append(runes, rune(bytea[i]))
-			i++
-		} else {
-			r, sz := utf8.DecodeRune(bytea[i:])
-			i += sz
-			runes = append(runes, r)
-		}
-	}
-	return runes
-}
-
-// TrimLen returns the length of trimmed rune array
-func TrimLen(runes []rune) int {
-	var i int
-	for i = len(runes) - 1; i >= 0; i-- {
-		char := runes[i]
-		if char != ' ' && char != '\t' {
-			break
-		}
-	}
-	// Completely empty
-	if i < 0 {
-		return 0
-	}
-
-	var j int
-	for j = 0; j < len(runes); j++ {
-		char := runes[j]
-		if char != ' ' && char != '\t' {
-			break
-		}
-	}
-	return i - j + 1
-}
-
 // ExecCommand executes the given command with $SHELL
 func ExecCommand(command string) *exec.Cmd {
 	shell := os.Getenv("SHELL")

src/util/util_test.go

@@ -3,7 +3,7 @@ package util
 import "testing"
 
 func TestMax(t *testing.T) {
-	if Max(-2, 5, 1, 4, 3) != 5 {
+	if Max(-2, 5) != 5 {
 		t.Error("Invalid result")
 	}
 }
@@ -20,23 +20,3 @@ func TestContrain(t *testing.T) {
 		t.Error("Expected", 3)
 	}
 }
-
-func TestTrimLen(t *testing.T) {
-	check := func(str string, exp int) {
-		trimmed := TrimLen([]rune(str))
-		if trimmed != exp {
-			t.Errorf("Invalid TrimLen result for '%s': %d (expected %d)",
-				str, trimmed, exp)
-		}
-	}
-	check("hello", 5)
-	check("hello ", 5)
-	check("hello  ", 5)
-	check(" hello", 5)
-	check("  hello", 5)
-	check(" hello ", 5)
-	check("  hello  ", 5)
-	check("h   o", 5)
-	check("  h   o  ", 5)
-	check("         ", 0)
-}

test/fzf.vader

@@ -1,5 +1,6 @@
 Execute (Setup):
   let g:dir = fnamemodify(g:vader_file, ':p:h')
+  unlet! g:fzf_layout g:fzf_action g:fzf_history_dir
   Log 'Test directory: ' . g:dir
   Save &acd
 
@@ -43,6 +44,11 @@ Execute (fzf#run with dir option and noautochdir):
   " No change in working directory
   AssertEqual cwd, getcwd()
 
+  call fzf#run({'source': ['/foobar'], 'sink': 'tabe', 'dir': '/tmp', 'options': '-1'})
+  AssertEqual cwd, getcwd()
+  tabclose
+  AssertEqual cwd, getcwd()
+
 Execute (Incomplete fzf#run with dir option and autochdir):
   set acd
   let cwd = getcwd()
@@ -64,6 +70,79 @@ Execute (fzf#run with dir option and autochdir when final cwd is same as dir):
   " Working directory changed due to &acd
   AssertEqual '/', getcwd()
 
+Execute (fzf#wrap):
+  AssertThrows fzf#wrap({'foo': 'bar'})
+
+  let opts = fzf#wrap('foobar')
+  Log opts
+  AssertEqual '~40%', opts.down
+  Assert opts.options =~ '--expect='
+  Assert !has_key(opts, 'sink')
+  Assert has_key(opts, 'sink*')
+
+  let opts = fzf#wrap('foobar', {}, 0)
+  Log opts
+  AssertEqual '~40%', opts.down
+
+  let opts = fzf#wrap('foobar', {}, 1)
+  Log opts
+  Assert !has_key(opts, 'down')
+
+  let opts = fzf#wrap('foobar', {'down': '50%'})
+  Log opts
+  AssertEqual '50%', opts.down
+
+  let opts = fzf#wrap('foobar', {'down': '50%'}, 1)
+  Log opts
+  Assert !has_key(opts, 'down')
+
+  let opts = fzf#wrap('foobar', {'sink': 'e'})
+  Log opts
+  AssertEqual 'e', opts.sink
+  Assert !has_key(opts, 'sink*')
+
+  let opts = fzf#wrap('foobar', {'options': '--reverse'})
+  Log opts
+  Assert opts.options =~ '--expect='
+  Assert opts.options =~ '--reverse'
+
+  let g:fzf_layout = {'window': 'enew'}
+  let opts = fzf#wrap('foobar')
+  Log opts
+  AssertEqual 'enew', opts.window
+
+  let opts = fzf#wrap('foobar', {}, 1)
+  Log opts
+  Assert !has_key(opts, 'window')
+
+  let opts = fzf#wrap('foobar', {'right': '50%'})
+  Log opts
+  Assert !has_key(opts, 'window')
+  AssertEqual '50%', opts.right
+
+  let opts = fzf#wrap('foobar', {'right': '50%'}, 1)
+  Log opts
+  Assert !has_key(opts, 'window')
+  Assert !has_key(opts, 'right')
+
+  let g:fzf_action = {'a': 'tabe'}
+  let opts = fzf#wrap('foobar')
+  Log opts
+  Assert opts.options =~ '--expect=a'
+  Assert !has_key(opts, 'sink')
+  Assert has_key(opts, 'sink*')
+
+  let opts = fzf#wrap('foobar', {'sink': 'e'})
+  Log opts
+  AssertEqual 'e', opts.sink
+  Assert !has_key(opts, 'sink*')
+
+  let g:fzf_history_dir = '/tmp'
+  let opts = fzf#wrap('foobar', {'options': '--color light'})
+  Log opts
+  Assert opts.options =~ '--history /tmp/foobar'
+  Assert opts.options =~ '--color light'
+
 Execute (Cleanup):
   unlet g:dir
   Restore

test/test_go.rb

@@ -31,11 +31,15 @@ def wait
     return if yield
     sleep 0.05
   end
-  throw 'timeout'
+  raise 'timeout'
 end
 
 class Shell
   class << self
+    def unsets
+      'unset FZF_DEFAULT_COMMAND FZF_DEFAULT_OPTS FZF_CTRL_T_COMMAND FZF_CTRL_T_OPTS FZF_ALT_C_COMMAND FZF_ALT_C_OPTS FZF_CTRL_R_OPTS;'
+    end
+
     def bash
       'PS1= PROMPT_COMMAND= bash --rcfile ~/.fzf.bash'
     end
@@ -45,6 +49,10 @@ class Shell
       FileUtils.cp File.expand_path('~/.fzf.zsh'), '/tmp/fzf-zsh/.zshrc'
       'PS1= PROMPT_COMMAND= HISTSIZE=100 ZDOTDIR=/tmp/fzf-zsh zsh'
     end
+
+    def fish
+      'fish'
+    end
   end
 end
 
@@ -57,11 +65,11 @@ class Tmux
     @win =
       case shell
       when :bash
-        go("new-window -d -P -F '#I' '#{Shell.bash}'").first
+        go("new-window -d -P -F '#I' '#{Shell.unsets + Shell.bash}'").first
       when :zsh
-        go("new-window -d -P -F '#I' '#{Shell.zsh}'").first
+        go("new-window -d -P -F '#I' '#{Shell.unsets + Shell.zsh}'").first
       when :fish
-        go("new-window -d -P -F '#I' 'fish'").first
+        go("new-window -d -P -F '#I' '#{Shell.unsets + Shell.fish}'").first
       else
         raise "Unknown shell: #{shell}"
       end
@@ -90,6 +98,10 @@ class Tmux
     go("send-keys -t #{target} #{args}")
   end
 
+  def paste str
+    %x[tmux setb '#{str.gsub("'", "'\\''")}' \\; pasteb -t #{win} \\; send-keys -t #{win} Enter]
+  end
+
   def capture pane = 0
     File.unlink TEMPNAME while File.exists? TEMPNAME
     wait do
@@ -149,12 +161,6 @@ class TestBase < Minitest::Test
      @temp_suffix].join '-'
   end
 
-  def setup
-    ENV.delete 'FZF_DEFAULT_OPTS'
-    ENV.delete 'FZF_CTRL_T_COMMAND'
-    ENV.delete 'FZF_DEFAULT_COMMAND'
-  end
-
   def readonce
     wait { File.exists?(tempname) }
     File.read(tempname)
@@ -207,13 +213,13 @@ class TestGoFZF < TestBase
     tmux.send_keys '99', 'C-a', '1', 'C-f', '3', 'C-b', 'C-h', 'C-u', 'C-e', 'C-y', 'C-k', 'Tab', 'BTab'
     tmux.until { |lines| lines[-2] == '  856/100000' }
     lines = tmux.capture
-    assert_equal '> 1391',       lines[-4]
+    assert_equal '> 3910',       lines[-4]
     assert_equal '  391',        lines[-3]
     assert_equal '  856/100000', lines[-2]
     assert_equal '> 391',        lines[-1]
 
     tmux.send_keys :Enter
-    assert_equal '1391', readonce.chomp
+    assert_equal '3910', readonce.chomp
   end
 
   def test_fzf_default_command
@@ -357,12 +363,12 @@ class TestGoFZF < TestBase
       tmux.send_keys :BTab, :BTab, :BTab
       tmux.until { |lines| lines[-2].include?('(3)') }
       tmux.send_keys :Enter
-      assert_equal ['5', '5', '15', '25'], readonce.split($/)
+      assert_equal ['5', '5', '50', '51'], readonce.split($/)
     end
   end
 
   def test_query_unicode
-    tmux.send_keys "(echo abc; echo 가나다) | #{fzf :query, '가다'}", :Enter
+    tmux.paste "(echo abc; echo 가나다) | #{fzf :query, '가다'}"
     tmux.until { |lines| lines[-2].include? '1/2' }
     tmux.send_keys :Enter
     assert_equal ['가나다'], readonce.split($/)
@@ -378,7 +384,7 @@ class TestGoFZF < TestBase
     tmux.send_keys :Enter
     tmux.until { |lines| lines[-1] == '>' }
     tmux.send_keys 'C-K', :Enter
-    assert_equal ['1919'], readonce.split($/)
+    assert_equal ['9090'], readonce.split($/)
   end
 
   def test_tac
@@ -394,6 +400,7 @@ class TestGoFZF < TestBase
     tmux.send_keys "seq 1 1000 | #{fzf :tac, :multi}", :Enter
     tmux.until { |lines| lines[-2].include? '1000/1000' }
     tmux.send_keys '99'
+    tmux.until { |lines| lines[-2].include? '28/1000' }
     tmux.send_keys :BTab, :BTab, :BTab
     tmux.until { |lines| lines[-2].include?('(3)') }
     tmux.send_keys :Enter
@@ -413,11 +420,12 @@ class TestGoFZF < TestBase
 
   def test_expect
     test = lambda do |key, feed, expected = key|
-      tmux.send_keys "seq 1 100 | #{fzf :expect, key}", :Enter
+      tmux.send_keys "seq 1 100 | #{fzf :expect, key}; sync", :Enter
       tmux.until { |lines| lines[-2].include? '100/100' }
       tmux.send_keys '55'
       tmux.until { |lines| lines[-2].include? '1/100' }
       tmux.send_keys *feed
+      tmux.prepare
       assert_equal [expected, '55'], readonce.split($/)
     end
     test.call 'ctrl-t', 'C-T'
@@ -428,6 +436,10 @@ class TestGoFZF < TestBase
     test.call 'f3', 'f3'
     test.call 'f2,f4', 'f2', 'f2'
     test.call 'f2,f4', 'f4', 'f4'
+    test.call 'alt-/', [:Escape, :/]
+    %w[f5 f6 f7 f8 f9 f10].each do |key|
+      test.call 'f5,f6,f7,f8,f9,f10', key, key
+    end
     test.call '@', '@'
   end
 
@@ -440,6 +452,15 @@ class TestGoFZF < TestBase
     assert_equal ['55', 'alt-z', '55'], readonce.split($/)
   end
 
+  def test_expect_printable_character_print_query
+    tmux.send_keys "seq 1 100 | #{fzf '--expect=z --print-query'}", :Enter
+    tmux.until { |lines| lines[-2].include? '100/100' }
+    tmux.send_keys '55'
+    tmux.until { |lines| lines[-2].include? '1/100' }
+    tmux.send_keys 'z'
+    assert_equal ['55', 'z', '55'], readonce.split($/)
+  end
+
   def test_expect_print_query_select_1
     tmux.send_keys "seq 1 100 | #{fzf '-q55 -1 --expect=alt-z --print-query'}", :Enter
     assert_equal ['55', '', '55'], readonce.split($/)
@@ -505,162 +526,91 @@ class TestGoFZF < TestBase
     assert_equal input, `#{FZF} -f"!z" -x --tiebreak end < #{tempname}`.split($/)
   end
 
-  # Since 0.11.2
-  def test_tiebreak_list
-    input = %w[
-      f-o-o-b-a-r
-      foobar----
-      --foobar
-      ----foobar
-      foobar--
-      --foobar--
-      foobar
+  def test_tiebreak_index_begin
+    writelines tempname, [
+      'xoxxxxxoxx',
+      'xoxxxxxox',
+      'xxoxxxoxx',
+      'xxxoxoxxx',
+      'xxxxoxox',
+      '  xxoxoxxx',
     ]
-    writelines tempname, input
 
-    assert_equal %w[
-      foobar----
-      --foobar
-      ----foobar
-      foobar--
-      --foobar--
-      foobar
-      f-o-o-b-a-r
-    ], `#{FZF} -ffb --tiebreak=index < #{tempname}`.split($/)
+    assert_equal [
+      'xxxxoxox',
+      '  xxoxoxxx',
+      'xxxoxoxxx',
+      'xxoxxxoxx',
+      'xoxxxxxox',
+      'xoxxxxxoxx',
+    ], `#{FZF} -foo < #{tempname}`.split($/)
 
-    by_length = %w[
-      foobar
-      --foobar
-      foobar--
-      foobar----
-      ----foobar
-      --foobar--
-      f-o-o-b-a-r
-    ]
-    assert_equal by_length, `#{FZF} -ffb < #{tempname}`.split($/)
-    assert_equal by_length, `#{FZF} -ffb --tiebreak=length < #{tempname}`.split($/)
+    assert_equal [
+      'xxxoxoxxx',
+      'xxxxoxox',
+      '  xxoxoxxx',
+      'xxoxxxoxx',
+      'xoxxxxxoxx',
+      'xoxxxxxox',
+    ], `#{FZF} -foo --tiebreak=index < #{tempname}`.split($/)
 
-    assert_equal %w[
-      foobar
-      foobar--
-      --foobar
-      foobar----
-      --foobar--
-      ----foobar
-      f-o-o-b-a-r
-    ], `#{FZF} -ffb --tiebreak=length,begin < #{tempname}`.split($/)
+    # Note that --tiebreak=begin is now based on the first occurrence of the
+    # first character on the pattern
+    assert_equal [
+      '  xxoxoxxx',
+      'xxxoxoxxx',
+      'xxxxoxox',
+      'xxoxxxoxx',
+      'xoxxxxxoxx',
+      'xoxxxxxox',
+    ], `#{FZF} -foo --tiebreak=begin < #{tempname}`.split($/)
 
-    assert_equal %w[
-      foobar
-      --foobar
-      foobar--
-      ----foobar
-      --foobar--
-      foobar----
-      f-o-o-b-a-r
-    ], `#{FZF} -ffb --tiebreak=length,end < #{tempname}`.split($/)
-
-    assert_equal %w[
-      foobar----
-      foobar--
-      foobar
-      --foobar
-      --foobar--
-      ----foobar
-      f-o-o-b-a-r
-    ], `#{FZF} -ffb --tiebreak=begin < #{tempname}`.split($/)
-
-    by_begin_end = %w[
-      foobar
-      foobar--
-      foobar----
-      --foobar
-      --foobar--
-      ----foobar
-      f-o-o-b-a-r
-    ]
-    assert_equal by_begin_end, `#{FZF} -ffb --tiebreak=begin,length < #{tempname}`.split($/)
-    assert_equal by_begin_end, `#{FZF} -ffb --tiebreak=begin,end < #{tempname}`.split($/)
-
-    assert_equal %w[
-      --foobar
-      ----foobar
-      foobar
-      foobar--
-      --foobar--
-      foobar----
-      f-o-o-b-a-r
-    ], `#{FZF} -ffb --tiebreak=end < #{tempname}`.split($/)
-
-    by_begin_end = %w[
-      foobar
-      --foobar
-      ----foobar
-      foobar--
-      --foobar--
-      foobar----
-      f-o-o-b-a-r
-    ]
-    assert_equal by_begin_end, `#{FZF} -ffb --tiebreak=end,begin < #{tempname}`.split($/)
-    assert_equal by_begin_end, `#{FZF} -ffb --tiebreak=end,length < #{tempname}`.split($/)
+    assert_equal [
+      '  xxoxoxxx',
+      'xxxoxoxxx',
+      'xxxxoxox',
+      'xxoxxxoxx',
+      'xoxxxxxox',
+      'xoxxxxxoxx',
+    ], `#{FZF} -foo --tiebreak=begin,length < #{tempname}`.split($/)
   end
 
-  def test_tiebreak_white_prefix
+  def test_tiebreak_end
     writelines tempname, [
-      'f o o b a r',
-      '    foo bar',
-      '    foobar',
-      '----foo bar',
-      '----foobar',
-      '  foo bar',
-      '  foobar--',
-      '  foobar',
-      '--foo bar',
-      '--foobar',
-      'foobar',
+      'xoxxxxxxxx',
+      'xxoxxxxxxx',
+      'xxxoxxxxxx',
+      'xxxxoxxxx',
+      'xxxxxoxxx',
+      '  xxxxoxxx',
     ]
 
     assert_equal [
-      '    foobar',
-      '  foobar',
-      'foobar',
-      '  foobar--',
-      '--foobar',
-      '----foobar',
-      '    foo bar',
-      '  foo bar',
-      '--foo bar',
-      '----foo bar',
-      'f o o b a r',
-    ], `#{FZF} -ffb < #{tempname}`.split($/)
+      '  xxxxoxxx',
+      'xxxxoxxxx',
+      'xxxxxoxxx',
+      'xoxxxxxxxx',
+      'xxoxxxxxxx',
+      'xxxoxxxxxx',
+    ], `#{FZF} -fo < #{tempname}`.split($/)
 
     assert_equal [
-      '    foobar',
-      '  foobar--',
-      '  foobar',
-      'foobar',
-      '--foobar',
-      '----foobar',
-      '    foo bar',
-      '  foo bar',
-      '--foo bar',
-      '----foo bar',
-      'f o o b a r',
-    ], `#{FZF} -ffb --tiebreak=begin < #{tempname}`.split($/)
+      'xxxxxoxxx',
+      '  xxxxoxxx',
+      'xxxxoxxxx',
+      'xxxoxxxxxx',
+      'xxoxxxxxxx',
+      'xoxxxxxxxx',
+    ], `#{FZF} -fo --tiebreak=end < #{tempname}`.split($/)
 
     assert_equal [
-      '    foobar',
-      '  foobar',
-      'foobar',
-      '  foobar--',
-      '--foobar',
-      '----foobar',
-      '    foo bar',
-      '  foo bar',
-      '--foo bar',
-      '----foo bar',
-      'f o o b a r',
-    ], `#{FZF} -ffb --tiebreak=begin,length < #{tempname}`.split($/)
+      '  xxxxoxxx',
+      'xxxxxoxxx',
+      'xxxxoxxxx',
+      'xxxoxxxxxx',
+      'xxoxxxxxxx',
+      'xoxxxxxxxx',
+    ], `#{FZF} -fo --tiebreak=end,length,begin < #{tempname}`.split($/)
   end
 
   def test_tiebreak_length_with_nth
@@ -709,10 +659,10 @@ class TestGoFZF < TestBase
 
     # len(1 ~ 2)
     output = [
-      "apple  ui     bottle 2",
       "app     ic    bottle 4",
-      "apple juice   bottle 1",
       "app     ice   bottle 3",
+      "apple  ui     bottle 2",
+      "apple juice   bottle 1",
     ]
     assert_equal output, `#{FZF} -fai -n1..2 < #{tempname}`.split($/)
 
@@ -727,26 +677,15 @@ class TestGoFZF < TestBase
 
     # len(2)
     output = [
-      "apple  ui     bottle 2",
       "app     ic    bottle 4",
       "app     ice   bottle 3",
+      "apple  ui     bottle 2",
       "apple juice   bottle 1",
     ]
     assert_equal output, `#{FZF} -fi -n2 < #{tempname}`.split($/)
     assert_equal output, `#{FZF} -fi -n2,1..2 < #{tempname}`.split($/)
   end
 
-  def test_tiebreak_end_backward_scan
-    input = %w[
-      foobar-fb
-      fubar
-    ]
-    writelines tempname, input
-
-    assert_equal input.reverse, `#{FZF} -f fb < #{tempname}`.split($/)
-    assert_equal input, `#{FZF} -f fb --tiebreak=end < #{tempname}`.split($/)
-  end
-
   def test_invalid_cache
     tmux.send_keys "(echo d; echo D; echo x) | #{fzf '-q d'}", :Enter
     tmux.until { |lines| lines[-2].include? '2/3' }
@@ -769,6 +708,13 @@ class TestGoFZF < TestBase
     assert_equal %w[4 5 6 9], readonce.split($/)
   end
 
+  def test_bind_print_query
+    tmux.send_keys "seq 1 1000 | #{fzf '-m --bind=ctrl-j:print-query'}", :Enter
+    tmux.until { |lines| lines[-2].end_with? '/1000' }
+    tmux.send_keys 'print-my-query', 'C-j'
+    assert_equal %w[print-my-query], readonce.split($/)
+  end
+
   def test_long_line
     data = '.' * 256 * 1024
     File.open(tempname, 'w') do |f|
@@ -856,20 +802,34 @@ class TestGoFZF < TestBase
 
   def test_execute
     output = '/tmp/fzf-test-execute'
-    opts = %[--bind \\"alt-a:execute(echo '[{}]' >> #{output}),alt-b:execute[echo '({}), ({})' >> #{output}],C:execute:echo '({}), [{}], @{}@' >> #{output}\\"]
-    tmux.send_keys "seq 100 | #{fzf opts}", :Enter
-    tmux.until { |lines| lines[-2].include? '100/100' }
-    tmux.send_keys :Escape, :a, :Escape, :a
+    opts = %[--bind \\"alt-a:execute(echo [{}] >> #{output}),alt-b:execute[echo /{}{}/ >> #{output}],C:execute:echo /{}{}{}/ >> #{output}\\"]
+    wait = lambda { |exp| tmux.until { |lines| lines[-2].include? exp } }
+    writelines tempname, %w[foo'bar foo"bar foo$bar]
+    tmux.send_keys "cat #{tempname} | #{fzf opts}; sync", :Enter
+    wait['3/3']
+    tmux.send_keys :Escape, :a
+    wait['/3']
+    tmux.send_keys :Escape, :a
+    wait['/3']
     tmux.send_keys :Up
-    tmux.send_keys :Escape, :b, :Escape, :b
+    tmux.send_keys :Escape, :b
+    wait['/3']
+    tmux.send_keys :Escape, :b
+    wait['/3']
     tmux.send_keys :Up
     tmux.send_keys :C
-    tmux.send_keys 'foobar'
-    tmux.until { |lines| lines[-2].include? '0/100' }
-    tmux.send_keys :Escape, :a, :Escape, :b, :Escape, :c
+    wait['3/3']
+    tmux.send_keys 'barfoo'
+    wait['0/3']
+    tmux.send_keys :Escape, :a
+    wait['/3']
+    tmux.send_keys :Escape, :b
+    wait['/3']
     tmux.send_keys :Enter
     readonce
-    assert_equal ['["1"]', '["1"]', '("2"), ("2")', '("2"), ("2")', '("3"), ["3"], @"3"@'],
+    assert_equal %w[[foo'bar] [foo'bar]
+                    /foo"barfoo"bar/ /foo"barfoo"bar/
+                    /foo$barfoo$barfoo$bar/],
       File.readlines(output).map(&:chomp)
   ensure
     File.unlink output rescue nil
@@ -877,17 +837,24 @@ class TestGoFZF < TestBase
 
   def test_execute_multi
     output = '/tmp/fzf-test-execute-multi'
-    opts = %[--multi --bind \\"alt-a:execute-multi(echo '[{}], @{}@' >> #{output})\\"]
-    tmux.send_keys "seq 100 | #{fzf opts}", :Enter
-    tmux.until { |lines| lines[-2].include? '100/100' }
+    opts = %[--multi --bind \\"alt-a:execute-multi(echo {}/{} >> #{output}; sync)\\"]
+    writelines tempname, %w[foo'bar foo"bar foo$bar foobar]
+    tmux.send_keys "cat #{tempname} | #{fzf opts}", :Enter
+    tmux.until { |lines| lines[-2].include? '4/4' }
     tmux.send_keys :Escape, :a
+    tmux.until { |lines| lines[-2].include? '/4' }
     tmux.send_keys :BTab, :BTab, :BTab
     tmux.send_keys :Escape, :a
+    tmux.until { |lines| lines[-2].include? '/4' }
     tmux.send_keys :Tab, :Tab
     tmux.send_keys :Escape, :a
+    tmux.until { |lines| lines[-2].include? '/4' }
     tmux.send_keys :Enter
+    tmux.prepare
     readonce
-    assert_equal ['["1"], @"1"@', '["1" "2" "3"], @"1" "2" "3"@', '["1" "2" "4"], @"1" "2" "4"@'],
+    assert_equal [%[foo'bar/foo'bar],
+                  %[foo'bar foo"bar foo$bar/foo'bar foo"bar foo$bar],
+                  %[foo'bar foo"bar foobar/foo'bar foo"bar foobar]],
       File.readlines(output).map(&:chomp)
   ensure
     File.unlink output rescue nil
@@ -906,7 +873,7 @@ class TestGoFZF < TestBase
     tmux.until { |lines| lines[-2].include? '1/1' }
     tmux.send_keys 'C-c'
     tmux.prepare
-    assert_equal ['-c / "foo"bar'], File.readlines(output).map(&:chomp)
+    assert_equal ["-c / 'foo'bar"], File.readlines(output).map(&:chomp)
   ensure
     File.unlink output rescue nil
   end
@@ -937,12 +904,12 @@ class TestGoFZF < TestBase
         lines[-2].include?('/90') &&
         lines[-3]  == '  1' &&
         lines[-4]  == '  2' &&
-        lines[-13] == '> 15'
+        lines[-13] == '> 50'
       end
       tmux.send_keys :Down
     end
     tmux.send_keys :Enter
-    assert_equal '15', readonce.chomp
+    assert_equal '50', readonce.chomp
   end
 
   def test_header_lines_reverse
@@ -952,12 +919,12 @@ class TestGoFZF < TestBase
         lines[1].include?('/90') &&
         lines[2]  == '  1' &&
         lines[3]  == '  2' &&
-        lines[12] == '> 15'
+        lines[12] == '> 50'
       end
       tmux.send_keys :Up
     end
     tmux.send_keys :Enter
-    assert_equal '15', readonce.chomp
+    assert_equal '50', readonce.chomp
   end
 
   def test_header_lines_overflow
@@ -1020,7 +987,7 @@ class TestGoFZF < TestBase
     end
   end
 
-  def test_canel
+  def test_cancel
     tmux.send_keys "seq 10 | #{fzf "--bind 2:cancel"}", :Enter
     tmux.until { |lines| lines[-2].include?('10/10') }
     tmux.send_keys '123'
@@ -1111,13 +1078,9 @@ class TestGoFZF < TestBase
 
   def test_exitstatus_empty
     { '99' => '0', '999' => '1' }.each do |query, status|
-      tmux.send_keys "seq 100 | #{FZF} -q #{query}", :Enter
+      tmux.send_keys "seq 100 | #{FZF} -q #{query}; echo --\\$?--", :Enter
       tmux.until { |lines| lines[-2] =~ %r{ [10]/100} }
       tmux.send_keys :Enter
-
-      tmux.send_keys 'echo --\$?--'
-      tmux.until { |lines| lines.last.include? "echo --$?--" }
-      tmux.send_keys :Enter
       tmux.until { |lines| lines.last.include? "--#{status}--" }
     end
   end
@@ -1151,6 +1114,81 @@ class TestGoFZF < TestBase
     end
   end
 
+  def test_partial_caching
+    tmux.send_keys 'seq 1000 | fzf -e', :Enter
+    tmux.until { |lines| lines[-2] == '  1000/1000' }
+    tmux.send_keys 11
+    tmux.until { |lines| lines[-2] == '  19/1000' }
+    tmux.send_keys 'C-a', "'"
+    tmux.until { |lines| lines[-2] == '  28/1000' }
+    tmux.send_keys :Enter
+  end
+
+  def test_jump
+    tmux.send_keys "seq 1000 | #{fzf "--multi --jump-labels 12345 --bind 'ctrl-j:jump'"}", :Enter
+    tmux.until { |lines| lines[-2] == '  1000/1000' }
+    tmux.send_keys 'C-j'
+    tmux.until { |lines| lines[-7] == '5 5' }
+    tmux.until { |lines| lines[-8] == '  6' }
+    tmux.send_keys '5'
+    tmux.until { |lines| lines[-7] == '> 5' }
+    tmux.send_keys :Tab
+    tmux.until { |lines| lines[-7] == ' >5' }
+    tmux.send_keys 'C-j'
+    tmux.until { |lines| lines[-7] == '5>5' }
+    tmux.send_keys '2'
+    tmux.until { |lines| lines[-4] == '> 2' }
+    tmux.send_keys :Tab
+    tmux.until { |lines| lines[-4] == ' >2' }
+    tmux.send_keys 'C-j'
+    tmux.until { |lines| lines[-7] == '5>5' }
+
+    # Press any key other than jump labels to cancel jump
+    tmux.send_keys '6'
+    tmux.until { |lines| lines[-3] == '> 1' }
+    tmux.send_keys :Tab
+    tmux.until { |lines| lines[-3] == '>>1' }
+    tmux.send_keys :Enter
+    assert_equal %w[5 2 1], readonce.split($/)
+  end
+
+  def test_jump_accept
+    tmux.send_keys "seq 1000 | #{fzf "--multi --jump-labels 12345 --bind 'ctrl-j:jump-accept'"}", :Enter
+    tmux.until { |lines| lines[-2] == '  1000/1000' }
+    tmux.send_keys 'C-j'
+    tmux.until { |lines| lines[-7] == '5 5' }
+    tmux.send_keys '3'
+    assert_equal '3', readonce.chomp
+  end
+
+  def test_preview
+    tmux.send_keys %[seq 1000 | sed s/^2$// | #{FZF} --preview 'sleep 0.2; echo {{}-{}}' --bind ?:toggle-preview], :Enter
+    tmux.until { |lines| lines[1].include?(' {1-1}') }
+    tmux.send_keys :Up
+    tmux.until { |lines| lines[1].include?(' {-}') }
+    tmux.send_keys '555'
+    tmux.until { |lines| lines[1].include?(' {555-555}') }
+    tmux.send_keys '?'
+    tmux.until { |lines| !lines[1].include?(' {555-555}') }
+    tmux.send_keys '?'
+    tmux.until { |lines| lines[1].include?(' {555-555}') }
+    tmux.send_keys :BSpace
+    tmux.until { |lines| lines[-2].start_with? '  28/1000' }
+    tmux.send_keys 'foobar'
+    tmux.until { |lines| !lines[1].include?('{') }
+  end
+
+  def test_preview_hidden
+    tmux.send_keys %[seq 1000 | #{FZF} --preview 'echo {{}-{}}' --preview-window down:1:hidden --bind ?:toggle-preview], :Enter
+    tmux.until { |lines| lines[-1] == '>' }
+    tmux.send_keys '?'
+    tmux.until { |lines| lines[-2].include?(' {1-1}') }
+    tmux.send_keys '555'
+    tmux.until { |lines| lines[-2].include?(' {555-555}') }
+    tmux.send_keys '?'
+    tmux.until { |lines| lines[-1] == '> 555' }
+  end
+
 private
   def writelines path, lines
     File.unlink path while File.exists? path
@@ -1206,6 +1244,35 @@ module TestShell
     tmux.until(0) { |lines| lines[-1].include? '1 2 3' }
   end
 
+  def test_ctrl_t_unicode
+    FileUtils.mkdir_p '/tmp/fzf-test'
+    tmux.paste 'cd /tmp/fzf-test; echo -n test1 > "fzf-unicode 테스트1"; echo -n test2 > "fzf-unicode 테스트2"'
+    tmux.prepare
+    tmux.send_keys 'cat ', 'C-t', pane: 0
+    tmux.until(1) { |lines| lines.item_count >= 1 }
+    tmux.send_keys 'fzf-unicode', pane: 1
+    tmux.until(1) { |lines| lines[-2].start_with? '  2/' }
+
+    tmux.send_keys '1', pane: 1
+    tmux.until(1) { |lines| lines[-2].start_with? '  1/' }
+    tmux.send_keys :BTab, pane: 1
+    tmux.until(1) { |lines| lines[-2].include? '(1)' }
+
+    tmux.send_keys :BSpace, pane: 1
+    tmux.until(1) { |lines| lines[-2].start_with? '  2/' }
+
+    tmux.send_keys '2', pane: 1
+    tmux.until(1) { |lines| lines[-2].start_with? '  1/' }
+    tmux.send_keys :BTab, pane: 1
+    tmux.until(1) { |lines| lines[-2].include? '(2)' }
+
+    tmux.send_keys :Enter, pane: 1
+    tmux.until { |lines| lines[-1].include?('cat') || lines[-2].include?('cat') }
+    tmux.until { |lines| lines[-1].include?('fzf-unicode') || lines[-2].include?('fzf-unicode') }
+    tmux.send_keys :Enter
+    tmux.until { |lines| lines[-1].include? 'test1test2' }
+  end
+
   def test_alt_c
     tmux.prepare
     tmux.send_keys :Escape, :c, pane: 0
@@ -1314,6 +1381,7 @@ module CompletionTest
       lines[-2].include?('100/') &&
       lines[-3].include?('/tmp/fzf-test/.hidden-')
     end
+    tmux.send_keys :Enter
   ensure
     ['/tmp/fzf-test', '/tmp/fzf test', '~/.fzf-home', 'no~such~user'].each do |f|
       FileUtils.rm_rf File.expand_path(f)
@@ -1405,6 +1473,32 @@ module CompletionTest
     tmux.send_keys :Enter
     tmux.until { |lines| lines[-1] == 'unset FOO' }
   end
+
+  def test_file_completion_unicode
+    FileUtils.mkdir_p '/tmp/fzf-test'
+    tmux.paste 'cd /tmp/fzf-test; echo -n test3 > "fzf-unicode 테스트1"; echo -n test4 > "fzf-unicode 테스트2"'
+    tmux.prepare
+    tmux.send_keys 'cat fzf-unicode**', :Tab, pane: 0
+    tmux.until(1) { |lines| lines[-2].start_with? '  2/' }
+
+    tmux.send_keys '1', pane: 1
+    tmux.until(1) { |lines| lines[-2].start_with? '  1/' }
+    tmux.send_keys :BTab, pane: 1
+    tmux.until(1) { |lines| lines[-2].include? '(1)' }
+
+    tmux.send_keys :BSpace, pane: 1
+    tmux.until(1) { |lines| lines[-2].start_with? '  2/' }
+
+    tmux.send_keys '2', pane: 1
+    tmux.until(1) { |lines| lines[-2].start_with? '  1/' }
+    tmux.send_keys :BTab, pane: 1
+    tmux.until(1) { |lines| lines[-2].include? '(2)' }
+
+    tmux.send_keys :Enter, pane: 1
+    tmux.until { |lines| lines[-1].include?('cat') || lines[-2].include?('cat') }
+    tmux.send_keys :Enter
+    tmux.until { |lines| lines[-1].include? 'test3test4' }
+  end
 end
 
 class TestBash < TestBase