fzf/shell/key-bindings.bash

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

if [[ $- =~ i ]]; then


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

#----BEGIN shfmt
#----BEGIN INCLUDE common.sh
# NOTE: Do not directly edit this section, which is copied from "common.sh".
# To modify it, one can edit "common.sh" and run "./update.sh" to apply
# the changes. See code comments in "common.sh" for the implementation details.

__fzf_defaults() {
  builtin printf '%s\n' "--height ${FZF_TMUX_HEIGHT:-40%} --min-height 20+ --bind=ctrl-z:ignore $1"
  command cat "${FZF_DEFAULT_OPTS_FILE-}" 2> /dev/null
  builtin printf '%s\n' "${FZF_DEFAULT_OPTS-} $2"
}

__fzf_exec_awk() {
  if [[ -z ${__fzf_awk-} ]]; then
    __fzf_awk=awk
    if [[ $OSTYPE == solaris* && -x /usr/xpg4/bin/awk ]]; then
      __fzf_awk=/usr/xpg4/bin/awk
    elif command -v mawk > /dev/null 2>&1; then
      local n x y z d
      IFS=' .' read -r n x y z d <<< $(command mawk -W version 2> /dev/null)
      [[ $n == mawk ]] &&
        (((x * 1000 + y) * 1000 + z >= 1003004)) 2> /dev/null &&
        ((d >= 20230302)) 2> /dev/null &&
        __fzf_awk=mawk
    fi
  fi
  LC_ALL=C exec "$__fzf_awk" "$@"
}
#----END INCLUDE

__fzf_select__() {
  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='' $(__fzfcmd) "$@" |
    while read -r item; do
      printf '%q ' "$item" # escape special chars
    done
}

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

fzf-file-widget() {
  local selected="$(__fzf_select__ "$@")"
  READLINE_LINE="${READLINE_LINE:0:READLINE_POINT}$selected${READLINE_LINE:READLINE_POINT}"
  READLINE_POINT=$((READLINE_POINT + ${#selected}))
}

__fzf_cd__() {
  local dir
  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='' $(__fzfcmd)
  ) && printf 'builtin cd -- %q' "$(builtin unset CDPATH && builtin cd -- "$dir" && builtin pwd)"
}

__fzf_history_delete() {
  [[ -s $1 ]] || return

  local offsets
  offsets=($(sort -rnu "$1"))
  for offset in "${offsets[@]}"; do
    builtin history -d "$offset"
  done

  if [[ ${#offsets[@]} -gt 0 ]] && shopt -q histappend; then
    builtin history -w
  fi
}

if command -v perl > /dev/null; then
  __fzf_history__() {
    local output script deletefile
    deletefile=$(mktemp)
    script='BEGIN { getc; $/ = "\n\t"; $HISTCOUNT = $ENV{last_hist} + 1 } s/^[ *]//; s/\n/\n\t/gm; print $HISTCOUNT - $. . "\t$_" if !$seen{$_}++'
    output=$(
      set +o pipefail
      builtin fc -lnr -2147483648 |
        last_hist=$(HISTTIMEFORMAT='' builtin history 1) command perl -n -l0 -e "$script" |
        FZF_DEFAULT_OPTS=$(__fzf_defaults "" "-n2..,.. --scheme=history --bind=ctrl-r:toggle-sort,alt-r:toggle-raw --wrap-sign '"$'\t'"↳ ' --highlight-line --bind 'shift-delete:execute-silent(cat {+f1} >> \"$deletefile\")+exclude-multi' --multi ${FZF_CTRL_R_OPTS-} --read0") \
        FZF_DEFAULT_OPTS_FILE='' $(__fzfcmd) --query "$READLINE_LINE"
    )
    __fzf_history_delete "$deletefile"
    command rm -f "$deletefile"
    [[ -n $output ]] || return
    READLINE_LINE=$(command perl -pe 's/^\d*\t//' <<< "$output")
    if [[ -z $READLINE_POINT ]]; then
      echo "$READLINE_LINE"
    else
      READLINE_POINT=0x7fffffff
    fi
  }
else # awk - fallback for POSIX systems
  __fzf_history__() {
    local output script deletefile
    deletefile=$(mktemp)
    [[ $(HISTTIMEFORMAT='' builtin history 1) =~ [[:digit:]]+ ]] # how many history entries
    script='function P(b) { ++n; sub(/^[ *]/, "", b); if (!seen[b]++) { printf "%d\t%s%c", '$((BASH_REMATCH + 1))' - n, b, 0 } }
    NR==1 { b = substr($0, 2); next }
    /^\t/ { P(b); b = substr($0, 2); next }
    { b = b RS $0 }
    END { if (NR) P(b) }'
    output=$(
      set +o pipefail
      builtin fc -lnr -2147483648 2> /dev/null | # ( $'\t '<lines>$'\n' )* ; <lines> ::= [^\n]* ( $'\n'<lines> )*
        __fzf_exec_awk "$script" |               # ( <counter>$'\t'<lines>$'\000' )*
        FZF_DEFAULT_OPTS=$(__fzf_defaults "" "-n2..,.. --scheme=history --bind=ctrl-r:toggle-sort,alt-r:toggle-raw --wrap-sign '"$'\t'"↳ ' --highlight-line --bind 'shift-delete:execute-silent(cat {+f1} >> \"$deletefile\")+exclude-multi' --multi ${FZF_CTRL_R_OPTS-} --read0") \
        FZF_DEFAULT_OPTS_FILE='' $(__fzfcmd) --query "$READLINE_LINE"
    )
    __fzf_history_delete "$deletefile"
    command rm -f "$deletefile"
    [[ -n $output ]] || return
    READLINE_LINE=${output#*$'\t'}
    if [[ -z $READLINE_POINT ]]; then
      echo "$READLINE_LINE"
    else
      READLINE_POINT=0x7fffffff
    fi
  }
fi

# Required to refresh the prompt after fzf
bind -m emacs-standard '"\C-\e(": redraw-current-line'

bind -m vi-command '"\C-z": emacs-editing-mode'
bind -m vi-insert '"\C-z": emacs-editing-mode'
bind -m emacs-standard '"\C-z": vi-editing-mode'

if ((BASH_VERSINFO[0] < 4)); then
  # CTRL-T - Paste the selected file path into the command line
  if [[ ${FZF_CTRL_T_COMMAND-x} != "" ]]; then
    bind -m emacs-standard '"\C-t": " \C-b\C-k \C-u`__fzf_select__`\e\C-e\C-\e(\C-a\C-y\C-h\C-e\e \C-y\ey\C-x\C-x\C-f\C-y\ey\C-_"'
    bind -m vi-command '"\C-t": "\C-z\C-t\C-z"'
    bind -m vi-insert '"\C-t": "\C-z\C-t\C-z"'
  fi

  # CTRL-R - Paste the selected command from history into the command line
  if [[ ${FZF_CTRL_R_COMMAND-x} != "" ]]; then
    if [[ -n ${FZF_CTRL_R_COMMAND-} ]]; then
      echo "warning: FZF_CTRL_R_COMMAND is set to a custom command, but custom commands are not yet supported for CTRL-R" >&2
    fi
    bind -m emacs-standard '"\C-r": "\C-e \C-u\C-y\ey\C-u`__fzf_history__`\e\C-e\C-\e("'
    bind -m vi-command '"\C-r": "\C-z\C-r\C-z"'
    bind -m vi-insert '"\C-r": "\C-z\C-r\C-z"'
  fi
else
  # CTRL-T - Paste the selected file path into the command line
  if [[ ${FZF_CTRL_T_COMMAND-x} != "" ]]; then
    bind -m emacs-standard -x '"\C-t": fzf-file-widget'
    bind -m vi-command -x '"\C-t": fzf-file-widget'
    bind -m vi-insert -x '"\C-t": fzf-file-widget'
  fi

  # CTRL-R - Paste the selected command from history into the command line
  if [[ ${FZF_CTRL_R_COMMAND-x} != "" ]]; then
    if [[ -n ${FZF_CTRL_R_COMMAND-} ]]; then
      echo "warning: FZF_CTRL_R_COMMAND is set to a custom command, but custom commands are not yet supported for CTRL-R" >&2
    fi
    bind -m emacs-standard -x '"\C-r": __fzf_history__'
    bind -m vi-command -x '"\C-r": __fzf_history__'
    bind -m vi-insert -x '"\C-r": __fzf_history__'
  fi
fi

# ALT-C - cd into the selected directory
if [[ ${FZF_ALT_C_COMMAND-x} != "" ]]; then
  bind -m emacs-standard '"\ec": " \C-b\C-k \C-u`__fzf_cd__`\e\C-e\C-\e(\C-m\C-y\C-h\e \C-y\ey\C-x\C-x\C-d\C-y\ey\C-_"'
  bind -m vi-command '"\ec": "\C-z\ec\C-z"'
  bind -m vi-insert '"\ec": "\C-z\ec\C-z"'
fi
#----END shfmt

fi