fzf/shell/key-bindings.zsh

#     ____      ____
#    / __/___  / __/
#   / /_/_  / / /_
#  / __/ / /_/ __/
# /_/   /___/_/ key-bindings.zsh
#
# - $FZF_TMUX_OPTS
# - $FZF_CTRL_T_COMMAND
# - $FZF_CTRL_T_OPTS
# - $FZF_CTRL_R_OPTS
# - $FZF_ALT_C_COMMAND
# - $FZF_ALT_C_OPTS


# Key bindings
# ------------

# The code at the top and the bottom of this file is the same as in completion.zsh.
# Refer to that file for explanation.
if 'zmodload' 'zsh/parameter' 2>'/dev/null' && (( ${+options} )); then
  __fzf_key_bindings_options="options=(${(j: :)${(kv)options[@]}})"
else
  () {
    __fzf_key_bindings_options="setopt"
    'local' '__fzf_opt'
    for __fzf_opt in "${(@)${(@f)$(set -o)}%% *}"; do
      if [[ -o "$__fzf_opt" ]]; then
        __fzf_key_bindings_options+=" -o $__fzf_opt"
      else
        __fzf_key_bindings_options+=" +o $__fzf_opt"
      fi
    done
  }
fi

'builtin' 'emulate' 'zsh' && 'builtin' 'setopt' 'no_aliases'

{
if [[ -o interactive ]]; then

__fzf_defaults() {
  # $1: Prepend to FZF_DEFAULT_OPTS_FILE and FZF_DEFAULT_OPTS
  # $2: Append to FZF_DEFAULT_OPTS_FILE and FZF_DEFAULT_OPTS
  echo -E "--height ${FZF_TMUX_HEIGHT:-40%} --min-height 20+ --bind=ctrl-z:ignore $1"
  command cat "${FZF_DEFAULT_OPTS_FILE-}" 2> /dev/null
  echo -E "${FZF_DEFAULT_OPTS-} $2"
}

# This function performs `exec awk "$@"` safely by working around awk
# compatibility issues.
#
# Note: To reduce an extra fork, this function performs "exec" so is expected
# to be run as the last command in a subshell.
#
# Note: This function is included with {completion,key-bindings}.{bash,zsh} and
# synchronized.
__fzf_exec_awk() {
  if [[ -z ${__fzf_awk-} ]]; then
    __fzf_awk=awk
    if [[ $OSTYPE == solaris* && -x /usr/xpg4/bin/awk ]]; then
      # Note: Solaris awk at /usr/bin/awk is meant for backward compatibility
      # with an ancient implementation of 1977 awk in the original UNIX.  It
      # lacks many features of POSIX awk, so it is essentially useless in the
      # modern point of view.  To use a standard-conforming version in Solaris,
      # one needs to explicitly use /usr/xpg4/bin/awk.
      __fzf_awk=/usr/xpg4/bin/awk
    else
      # choose the faster mawk if: it's installed && build date >= 20230322 &&
      # version >= 1.3.4
      local n x y z d
      IFS=' .' read n x y z d <<< $(command mawk -W version 2> /dev/null)
      [[ $n == mawk ]] && (( d >= 20230302 && (x * 1000 + y) * 1000 + z >= 1003004 )) && __fzf_awk=mawk
    fi
  fi

  # Note: macOS awk has a quirk that it stops processing at all when it sees
  # any data not following UTF-8 in the input stream when the current LC_CTYPE
  # specifies the UTF-8 encoding.  To work around this quirk, one needs to
  # specify LC_ALL=C to change the current encoding to the plain one.
  LC_ALL=C exec "$__fzf_awk" "$@"
}

# CTRL-T - Paste the selected file path(s) into the command line
__fzf_select() {
  setopt localoptions pipefail no_aliases 2> /dev/null
  local item
  FZF_DEFAULT_COMMAND=${FZF_CTRL_T_COMMAND:-} \
  FZF_DEFAULT_OPTS=$(__fzf_defaults "--reverse --walker=file,dir,follow,hidden --scheme=path" "${FZF_CTRL_T_OPTS-} -m") \
  FZF_DEFAULT_OPTS_FILE='' $(__fzfcmd) "$@" < /dev/tty | while read -r item; do
    echo -n -E "${(q)item} "
  done
  local ret=$?
  echo
  return $ret
}

__fzfcmd() {
  [ -n "${TMUX_PANE-}" ] && { [ "${FZF_TMUX:-0}" != 0 ] || [ -n "${FZF_TMUX_OPTS-}" ]; } &&
    echo "fzf-tmux ${FZF_TMUX_OPTS:--d${FZF_TMUX_HEIGHT:-40%}} -- " || echo "fzf"
}

fzf-file-widget() {
  LBUFFER="${LBUFFER}$(__fzf_select)"
  local ret=$?
  zle reset-prompt
  return $ret
}
if [[ "${FZF_CTRL_T_COMMAND-x}" != "" ]]; then
  zle     -N            fzf-file-widget
  bindkey -M emacs '^T' fzf-file-widget
  bindkey -M vicmd '^T' fzf-file-widget
  bindkey -M viins '^T' fzf-file-widget
fi

# ALT-C - cd into the selected directory
fzf-cd-widget() {
  setopt localoptions pipefail no_aliases 2> /dev/null
  local dir="$(
    FZF_DEFAULT_COMMAND=${FZF_ALT_C_COMMAND:-} \
    FZF_DEFAULT_OPTS=$(__fzf_defaults "--reverse --walker=dir,follow,hidden --scheme=path" "${FZF_ALT_C_OPTS-} +m") \
    FZF_DEFAULT_OPTS_FILE='' $(__fzfcmd) < /dev/tty)"
  if [[ -z "$dir" ]]; then
    zle redisplay
    return 0
  fi
  zle push-line # Clear buffer. Auto-restored on next prompt.
  BUFFER="builtin cd -- ${(q)dir:a}"
  zle accept-line
  local ret=$?
  unset dir # ensure this doesn't end up appearing in prompt expansion
  zle reset-prompt
  return $ret
}
if [[ "${FZF_ALT_C_COMMAND-x}" != "" ]]; then
  zle     -N             fzf-cd-widget
  bindkey -M emacs '\ec' fzf-cd-widget
  bindkey -M vicmd '\ec' fzf-cd-widget
  bindkey -M viins '\ec' fzf-cd-widget
fi

# CTRL-R - Paste the selected command from history into the command line
fzf-history-widget() {
  local selected
  setopt localoptions noglobsubst noposixbuiltins pipefail no_aliases noglob nobash_rematch 2> /dev/null
  # Ensure the module is loaded if not already, and the required features, such
  # as the associative 'history' array, which maps event numbers to full history
  # lines, are set. Also, make sure Perl is installed for multi-line output.
  if zmodload -F zsh/parameter p:{commands,history} 2>/dev/null && (( ${+commands[perl]} )); then
    selected="$(printf '%s\t%s\000' "${(kv)history[@]}" |
      perl -0 -ne 'if (!$seen{(/^\s*[0-9]+\**\t(.*)/s, $1)}++) { s/\n/\n\t/g; print; }' |
      FZF_DEFAULT_OPTS=$(__fzf_defaults "" "-n2..,.. --scheme=history --bind=ctrl-r:toggle-sort --wrap-sign '\t↳ ' --highlight-line ${FZF_CTRL_R_OPTS-} --query=${(qqq)LBUFFER} +m --read0") \
      FZF_DEFAULT_OPTS_FILE='' $(__fzfcmd))"
  else
    selected="$(fc -rl 1 | __fzf_exec_awk '{ cmd=$0; sub(/^[ \t]*[0-9]+\**[ \t]+/, "", cmd); if (!seen[cmd]++) print $0 }' |
      FZF_DEFAULT_OPTS=$(__fzf_defaults "" "-n2..,.. --scheme=history --bind=ctrl-r:toggle-sort --wrap-sign '\t↳ ' --highlight-line ${FZF_CTRL_R_OPTS-} --query=${(qqq)LBUFFER} +m") \
      FZF_DEFAULT_OPTS_FILE='' $(__fzfcmd))"
  fi
  local ret=$?
  if [ -n "$selected" ]; then
    if [[ $(__fzf_exec_awk '{print $1; exit}' <<< "$selected") =~ ^[1-9][0-9]* ]]; then
      zle vi-fetch-history -n $MATCH
    else # selected is a custom query, not from history
      LBUFFER="$selected"
    fi
  fi
  zle reset-prompt
  return $ret
}
zle     -N            fzf-history-widget
bindkey -M emacs '^R' fzf-history-widget
bindkey -M vicmd '^R' fzf-history-widget
bindkey -M viins '^R' fzf-history-widget
fi

} always {
  eval $__fzf_key_bindings_options
  'unset' '__fzf_key_bindings_options'
}