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zsh-autosuggestions/zsh-autosuggestions.zsh
skywind3000 650aad5f08 update predefined strategies
2018-03-07 17:11:12 +08:00

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# Fish-like fast/unobtrusive autosuggestions for zsh.
# https://github.com/zsh-users/zsh-autosuggestions
# v0.4.2
# Copyright (c) 2013 Thiago de Arruda
# Copyright (c) 2016-2017 Eric Freese
#
# 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.
#--------------------------------------------------------------------#
# Setup #
#--------------------------------------------------------------------#
# Precmd hooks for initializing the library and starting pty's
autoload -Uz add-zsh-hook
# Asynchronous suggestions are generated in a pty
zmodload zsh/zpty
#--------------------------------------------------------------------#
# Global Configuration Variables #
#--------------------------------------------------------------------#
# Color to use when highlighting suggestion
# Uses format of `region_highlight`
# More info: http://zsh.sourceforge.net/Doc/Release/Zsh-Line-Editor.html#Zle-Widgets
ZSH_AUTOSUGGEST_HIGHLIGHT_STYLE='fg=8'
# Prefix to use when saving original versions of bound widgets
ZSH_AUTOSUGGEST_ORIGINAL_WIDGET_PREFIX=autosuggest-orig-
ZSH_AUTOSUGGEST_STRATEGY=default
# Widgets that clear the suggestion
ZSH_AUTOSUGGEST_CLEAR_WIDGETS=(
history-search-forward
history-search-backward
history-beginning-search-forward
history-beginning-search-backward
history-substring-search-up
history-substring-search-down
up-line-or-history
down-line-or-history
accept-line
)
# Widgets that accept the entire suggestion
ZSH_AUTOSUGGEST_ACCEPT_WIDGETS=(
forward-char
end-of-line
vi-forward-char
vi-end-of-line
vi-add-eol
)
# Widgets that accept the entire suggestion and execute it
ZSH_AUTOSUGGEST_EXECUTE_WIDGETS=(
)
# Widgets that accept the suggestion as far as the cursor moves
ZSH_AUTOSUGGEST_PARTIAL_ACCEPT_WIDGETS=(
forward-word
emacs-forward-word
vi-forward-word
vi-forward-word-end
vi-forward-blank-word
vi-forward-blank-word-end
)
# Widgets that should be ignored (globbing supported but must be escaped)
ZSH_AUTOSUGGEST_IGNORE_WIDGETS=(
orig-\*
beep
run-help
set-local-history
which-command
yank
)
# Max size of buffer to trigger autosuggestion. Leave undefined for no upper bound.
ZSH_AUTOSUGGEST_BUFFER_MAX_SIZE=
# Pty name for calculating autosuggestions asynchronously
ZSH_AUTOSUGGEST_ASYNC_PTY_NAME=zsh_autosuggest_pty
#--------------------------------------------------------------------#
# Utility Functions #
#--------------------------------------------------------------------#
_zsh_autosuggest_escape_command() {
setopt localoptions EXTENDED_GLOB
# Escape special chars in the string (requires EXTENDED_GLOB)
echo -E "${1//(#m)[\"\'\\()\[\]|*?~]/\\$MATCH}"
}
#--------------------------------------------------------------------#
# Feature Detection #
#--------------------------------------------------------------------#
_zsh_autosuggest_feature_detect_zpty_returns_fd() {
typeset -g _ZSH_AUTOSUGGEST_ZPTY_RETURNS_FD
typeset -h REPLY
zpty zsh_autosuggest_feature_detect '{ zshexit() { kill -KILL $$; sleep 1 } }'
if (( REPLY )); then
_ZSH_AUTOSUGGEST_ZPTY_RETURNS_FD=1
else
_ZSH_AUTOSUGGEST_ZPTY_RETURNS_FD=0
fi
zpty -d zsh_autosuggest_feature_detect
}
#--------------------------------------------------------------------#
# Widget Helpers #
#--------------------------------------------------------------------#
_zsh_autosuggest_incr_bind_count() {
if ((${+_ZSH_AUTOSUGGEST_BIND_COUNTS[$1]})); then
((_ZSH_AUTOSUGGEST_BIND_COUNTS[$1]++))
else
_ZSH_AUTOSUGGEST_BIND_COUNTS[$1]=1
fi
typeset -gi bind_count=$_ZSH_AUTOSUGGEST_BIND_COUNTS[$1]
}
_zsh_autosuggest_get_bind_count() {
if ((${+_ZSH_AUTOSUGGEST_BIND_COUNTS[$1]})); then
typeset -gi bind_count=$_ZSH_AUTOSUGGEST_BIND_COUNTS[$1]
else
typeset -gi bind_count=0
fi
}
# Bind a single widget to an autosuggest widget, saving a reference to the original widget
_zsh_autosuggest_bind_widget() {
typeset -gA _ZSH_AUTOSUGGEST_BIND_COUNTS
local widget=$1
local autosuggest_action=$2
local prefix=$ZSH_AUTOSUGGEST_ORIGINAL_WIDGET_PREFIX
local -i bind_count
# Save a reference to the original widget
case $widgets[$widget] in
# Already bound
user:_zsh_autosuggest_(bound|orig)_*);;
# User-defined widget
user:*)
_zsh_autosuggest_incr_bind_count $widget
zle -N $prefix${bind_count}-$widget ${widgets[$widget]#*:}
;;
# Built-in widget
builtin)
_zsh_autosuggest_incr_bind_count $widget
eval "_zsh_autosuggest_orig_${(q)widget}() { zle .${(q)widget} }"
zle -N $prefix${bind_count}-$widget _zsh_autosuggest_orig_$widget
;;
# Completion widget
completion:*)
_zsh_autosuggest_incr_bind_count $widget
eval "zle -C $prefix${bind_count}-${(q)widget} ${${(s.:.)widgets[$widget]}[2,3]}"
;;
esac
_zsh_autosuggest_get_bind_count $widget
# Pass the original widget's name explicitly into the autosuggest
# function. Use this passed in widget name to call the original
# widget instead of relying on the $WIDGET variable being set
# correctly. $WIDGET cannot be trusted because other plugins call
# zle without the `-w` flag (e.g. `zle self-insert` instead of
# `zle self-insert -w`).
eval "_zsh_autosuggest_bound_${bind_count}_${(q)widget}() {
_zsh_autosuggest_widget_$autosuggest_action $prefix$bind_count-${(q)widget} \$@
}"
# Create the bound widget
zle -N $widget _zsh_autosuggest_bound_${bind_count}_$widget
}
# Map all configured widgets to the right autosuggest widgets
_zsh_autosuggest_bind_widgets() {
local widget
local ignore_widgets
ignore_widgets=(
.\*
_\*
zle-\*
autosuggest-\*
$ZSH_AUTOSUGGEST_ORIGINAL_WIDGET_PREFIX\*
$ZSH_AUTOSUGGEST_IGNORE_WIDGETS
)
# Find every widget we might want to bind and bind it appropriately
for widget in ${${(f)"$(builtin zle -la)"}:#${(j:|:)~ignore_widgets}}; do
if [[ -n ${ZSH_AUTOSUGGEST_CLEAR_WIDGETS[(r)$widget]} ]]; then
_zsh_autosuggest_bind_widget $widget clear
elif [[ -n ${ZSH_AUTOSUGGEST_ACCEPT_WIDGETS[(r)$widget]} ]]; then
_zsh_autosuggest_bind_widget $widget accept
elif [[ -n ${ZSH_AUTOSUGGEST_EXECUTE_WIDGETS[(r)$widget]} ]]; then
_zsh_autosuggest_bind_widget $widget execute
elif [[ -n ${ZSH_AUTOSUGGEST_PARTIAL_ACCEPT_WIDGETS[(r)$widget]} ]]; then
_zsh_autosuggest_bind_widget $widget partial_accept
else
# Assume any unspecified widget might modify the buffer
_zsh_autosuggest_bind_widget $widget modify
fi
done
}
# Given the name of an original widget and args, invoke it, if it exists
_zsh_autosuggest_invoke_original_widget() {
# Do nothing unless called with at least one arg
(( $# )) || return
local original_widget_name="$1"
shift
if (( ${+widgets[$original_widget_name]} )); then
zle $original_widget_name -- $@
fi
}
#--------------------------------------------------------------------#
# Highlighting #
#--------------------------------------------------------------------#
# If there was a highlight, remove it
_zsh_autosuggest_highlight_reset() {
typeset -g _ZSH_AUTOSUGGEST_LAST_HIGHLIGHT
if [[ -n "$_ZSH_AUTOSUGGEST_LAST_HIGHLIGHT" ]]; then
region_highlight=("${(@)region_highlight:#$_ZSH_AUTOSUGGEST_LAST_HIGHLIGHT}")
unset _ZSH_AUTOSUGGEST_LAST_HIGHLIGHT
fi
}
# If there's a suggestion, highlight it
_zsh_autosuggest_highlight_apply() {
typeset -g _ZSH_AUTOSUGGEST_LAST_HIGHLIGHT
if (( $#POSTDISPLAY )); then
typeset -g _ZSH_AUTOSUGGEST_LAST_HIGHLIGHT="$#BUFFER $(($#BUFFER + $#POSTDISPLAY)) $ZSH_AUTOSUGGEST_HIGHLIGHT_STYLE"
region_highlight+=("$_ZSH_AUTOSUGGEST_LAST_HIGHLIGHT")
else
unset _ZSH_AUTOSUGGEST_LAST_HIGHLIGHT
fi
}
#--------------------------------------------------------------------#
# Autosuggest Widget Implementations #
#--------------------------------------------------------------------#
# Disable suggestions
_zsh_autosuggest_disable() {
typeset -g _ZSH_AUTOSUGGEST_DISABLED
_zsh_autosuggest_clear
}
# Enable suggestions
_zsh_autosuggest_enable() {
unset _ZSH_AUTOSUGGEST_DISABLED
if (( $#BUFFER )); then
_zsh_autosuggest_fetch
fi
}
# Toggle suggestions (enable/disable)
_zsh_autosuggest_toggle() {
if [[ -n "${_ZSH_AUTOSUGGEST_DISABLED+x}" ]]; then
_zsh_autosuggest_enable
else
_zsh_autosuggest_disable
fi
}
# Clear the suggestion
_zsh_autosuggest_clear() {
# Remove the suggestion
unset POSTDISPLAY
_zsh_autosuggest_invoke_original_widget $@
}
# Modify the buffer and get a new suggestion
_zsh_autosuggest_modify() {
local -i retval
# Only available in zsh >= 5.4
local -i KEYS_QUEUED_COUNT
# Save the contents of the buffer/postdisplay
local orig_buffer="$BUFFER"
local orig_postdisplay="$POSTDISPLAY"
# Clear suggestion while waiting for next one
unset POSTDISPLAY
# Original widget may modify the buffer
_zsh_autosuggest_invoke_original_widget $@
retval=$?
# Don't fetch a new suggestion if there's more input to be read immediately
if (( $PENDING > 0 )) || (( $KEYS_QUEUED_COUNT > 0 )); then
return $retval
fi
# Optimize if manually typing in the suggestion
if (( $#BUFFER > $#orig_buffer )); then
local added=${BUFFER#$orig_buffer}
# If the string added matches the beginning of the postdisplay
if [[ "$added" = "${orig_postdisplay:0:$#added}" ]]; then
POSTDISPLAY="${orig_postdisplay:$#added}"
return $retval
fi
fi
# Don't fetch a new suggestion if the buffer hasn't changed
if [[ "$BUFFER" = "$orig_buffer" ]]; then
POSTDISPLAY="$orig_postdisplay"
return $retval
fi
# Bail out if suggestions are disabled
if [[ -n "${_ZSH_AUTOSUGGEST_DISABLED+x}" ]]; then
return $?
fi
# Get a new suggestion if the buffer is not empty after modification
if (( $#BUFFER > 0 )); then
if [[ -z "$ZSH_AUTOSUGGEST_BUFFER_MAX_SIZE" ]] || (( $#BUFFER <= $ZSH_AUTOSUGGEST_BUFFER_MAX_SIZE )); then
_zsh_autosuggest_fetch
fi
fi
return $retval
}
# Fetch a new suggestion based on what's currently in the buffer
_zsh_autosuggest_fetch() {
if zpty -t "$ZSH_AUTOSUGGEST_ASYNC_PTY_NAME" &>/dev/null; then
_zsh_autosuggest_async_request "$BUFFER"
else
local suggestion
_zsh_autosuggest_strategy_$ZSH_AUTOSUGGEST_STRATEGY "$BUFFER"
_zsh_autosuggest_suggest "$suggestion"
fi
}
# Offer a suggestion
_zsh_autosuggest_suggest() {
local suggestion="$1"
if [[ -n "$suggestion" ]] && (( $#BUFFER )); then
POSTDISPLAY="${suggestion#$BUFFER}"
else
unset POSTDISPLAY
fi
}
# Accept the entire suggestion
_zsh_autosuggest_accept() {
local -i max_cursor_pos=$#BUFFER
# When vicmd keymap is active, the cursor can't move all the way
# to the end of the buffer
if [[ "$KEYMAP" = "vicmd" ]]; then
max_cursor_pos=$((max_cursor_pos - 1))
fi
# Only accept if the cursor is at the end of the buffer
if [[ $CURSOR = $max_cursor_pos ]]; then
# Add the suggestion to the buffer
BUFFER="$BUFFER$POSTDISPLAY"
# Remove the suggestion
unset POSTDISPLAY
# Move the cursor to the end of the buffer
CURSOR=${#BUFFER}
fi
_zsh_autosuggest_invoke_original_widget $@
}
# Accept the entire suggestion and execute it
_zsh_autosuggest_execute() {
# Add the suggestion to the buffer
BUFFER="$BUFFER$POSTDISPLAY"
# Remove the suggestion
unset POSTDISPLAY
# Call the original `accept-line` to handle syntax highlighting or
# other potential custom behavior
_zsh_autosuggest_invoke_original_widget "accept-line"
}
# Partially accept the suggestion
_zsh_autosuggest_partial_accept() {
local -i retval
# Save the contents of the buffer so we can restore later if needed
local original_buffer="$BUFFER"
# Temporarily accept the suggestion.
BUFFER="$BUFFER$POSTDISPLAY"
# Original widget moves the cursor
_zsh_autosuggest_invoke_original_widget $@
retval=$?
# If we've moved past the end of the original buffer
if (( $CURSOR > $#original_buffer )); then
# Set POSTDISPLAY to text right of the cursor
POSTDISPLAY="$RBUFFER"
# Clip the buffer at the cursor
BUFFER="$LBUFFER"
else
# Restore the original buffer
BUFFER="$original_buffer"
fi
return $retval
}
for action in clear modify fetch suggest accept partial_accept execute enable disable toggle; do
eval "_zsh_autosuggest_widget_$action() {
local -i retval
_zsh_autosuggest_highlight_reset
_zsh_autosuggest_$action \$@
retval=\$?
_zsh_autosuggest_highlight_apply
zle -R
return \$retval
}"
done
zle -N autosuggest-fetch _zsh_autosuggest_widget_fetch
zle -N autosuggest-suggest _zsh_autosuggest_widget_suggest
zle -N autosuggest-accept _zsh_autosuggest_widget_accept
zle -N autosuggest-clear _zsh_autosuggest_widget_clear
zle -N autosuggest-execute _zsh_autosuggest_widget_execute
zle -N autosuggest-enable _zsh_autosuggest_widget_enable
zle -N autosuggest-disable _zsh_autosuggest_widget_disable
zle -N autosuggest-toggle _zsh_autosuggest_widget_toggle
#--------------------------------------------------------------------#
# Default Suggestion Strategy #
#--------------------------------------------------------------------#
# Suggests the most recent history item that matches the given
# prefix.
#
_zsh_autosuggest_strategy_default() {
# Reset options to defaults and enable LOCAL_OPTIONS
emulate -L zsh
# Enable globbing flags so that we can use (#m)
setopt EXTENDED_GLOB
# Escape backslashes and all of the glob operators so we can use
# this string as a pattern to search the $history associative array.
# - (#m) globbing flag enables setting references for match data
# TODO: Use (b) flag when we can drop support for zsh older than v5.0.8
local prefix="${1//(#m)[\\*?[\]<>()|^~#]/\\$MATCH}"
# Get the history items that match
# - (r) subscript flag makes the pattern match on values
typeset -g suggestion="${history[(r)${prefix}*]}"
}
#--------------------------------------------------------------------#
# Match Previous Command Suggestion Strategy #
#--------------------------------------------------------------------#
# Suggests the most recent history item that matches the given
# prefix and whose preceding history item also matches the most
# recently executed command.
#
# For example, suppose your history has the following entries:
# - pwd
# - ls foo
# - ls bar
# - pwd
#
# Given the history list above, when you type 'ls', the suggestion
# will be 'ls foo' rather than 'ls bar' because your most recently
# executed command (pwd) was previously followed by 'ls foo'.
#
# Note that this strategy won't work as expected with ZSH options that don't
# preserve the history order such as `HIST_IGNORE_ALL_DUPS` or
# `HIST_EXPIRE_DUPS_FIRST`.
_zsh_autosuggest_strategy_match_prev_cmd() {
# Reset options to defaults and enable LOCAL_OPTIONS
emulate -L zsh
# Enable globbing flags so that we can use (#m)
setopt EXTENDED_GLOB
# TODO: Use (b) flag when we can drop support for zsh older than v5.0.8
local prefix="${1//(#m)[\\*?[\]<>()|^~#]/\\$MATCH}"
# Get all history event numbers that correspond to history
# entries that match pattern $prefix*
local history_match_keys
history_match_keys=(${(k)history[(R)$prefix*]})
# By default we use the first history number (most recent history entry)
local histkey="${history_match_keys[1]}"
# Get the previously executed command
local prev_cmd="$(_zsh_autosuggest_escape_command "${history[$((HISTCMD-1))]}")"
# Iterate up to the first 200 history event numbers that match $prefix
for key in "${(@)history_match_keys[1,200]}"; do
# Stop if we ran out of history
[[ $key -gt 1 ]] || break
# See if the history entry preceding the suggestion matches the
# previous command, and use it if it does
if [[ "${history[$((key - 1))]}" == "$prev_cmd" ]]; then
histkey="$key"
break
fi
done
# Give back the matched history entry
typeset -g suggestion="$history[$histkey]"
}
# zsh-augosuggestion: predefined strategy
# 1. search in history, returns result if it exists
# 2. search in predefined files
#
# configuration:
#
# ZSH_AUTOSUGGEST_PREDEFINE_PATH - user defined files separated by semicolon
#
# "~/.local/share/zsh_autosuggest/predefined" will be generated at the first time
#
# zsh-autosuggestions/predefined.txt is generated from tldr pages and
# will ship with predefined.zsh .
#
_zsh_autosuggest_script_path="${0:A:h}"
_zsh_autosuggest_data_home="${XDG_DATA_HOME:-$HOME/.local/share}/zsh_autosuggest"
_zsh_autosuggest_predefined_generate() {
local pbase="$_zsh_autosuggest_data_home"
local pname="$pbase/predefined"
local ptemp="$pbase/predefined.$[RANDOM]"
local suggests=()
local pwd=$(pwd)
[ ! -d "$pbase" ] && mkdir -p "$pbase" 2> /dev/null
# skip when ~/.zsh_autosuggest exists
[ -f "$pname" ] && return
echo "autosuggestions is generating: $pname"
# copy builtin predefine database
local txt="${_zsh_autosuggest_script_path}/predefined.txt"
[ -f "$txt" ] && cat "$txt" > "$ptemp"
# enumerate commands in $PATH and add them to ~/.zsh_autosuggest
for p ("${(@s/:/)PATH}"); do
[ ! -d "$p" ] && continue
cd "$p"
local files=($(command ls))
for fn in ${files}; do
if [ -x "$fn" ] && [[ "${fn:l}" != *.dll ]]; then
if [ -f "$fn" ] && [[ "${fn:l}" != *.nls ]]; then
# trim cygwin .exe/.cmd/.bat postfix
if [[ "$fn" == *.exe ]]; then
fn=${fn/%.exe/}
elif [[ "$fn" == *.cmd ]]; then
fn=${fn/%.cmd/}
elif [[ "$fn" == *.bat ]]; then
fn=${fn/%.bat/}
fi
if [[ ${#fn} -gt 1 ]]; then
suggests+=$fn
fi
fi
fi
done
done
cd "${pwd}"
# TODO: generate command parameters from completion database
print -l $suggests >> "$ptemp"
# atomic change file name
mv -f "$ptemp" "$pname"
}
_zsh_autosuggest_strategy_predefined() {
emulate -L zsh
setopt EXTENDED_GLOB
local prefix="${1//(#m)[\\*?[\]<>()|^~#]/\\$MATCH}"
# search the history at first
local result="${history[(r)${prefix}*]}"
# search the predefine files if nothing found in history
if [[ -z "$result" ]]; then
if (( ! ${+_ZSH_AUTOSUGGEST_PREDEFINE} )); then
# _zsh_autosuggest_predefined_generate
typeset -g _ZSH_AUTOSUGGEST_PREDEFINE=()
local pbase="$_zsh_autosuggest_data_home"
local pname="$pbase/predefined"
local names="${ZSH_AUTOSUGGEST_PREDEFINE_PATH};$pname"
local array=()
for i ("${(s:;:)names}"); do
if [[ -n "$i" ]] && [[ -f "$i" ]]; then
local temp=(${(f)"$(<$i)"})
array+=($temp)
fi
done
_ZSH_AUTOSUGGEST_PREDEFINE+=($array)
fi
result="${_ZSH_AUTOSUGGEST_PREDEFINE[(r)${prefix}*]}"
fi
typeset -g suggestion="$result"
}
_zsh_autosuggest_predefined_generate
# vim: set ts=4 sw=4 tw=0 et :
#--------------------------------------------------------------------#
# Async #
#--------------------------------------------------------------------#
# Zpty process is spawned running this function
_zsh_autosuggest_async_server() {
emulate -R zsh
# There is a bug in zpty module (fixed in zsh/master) by which a
# zpty that exits will kill all zpty processes that were forked
# before it. Here we set up a zsh exit hook to SIGKILL the zpty
# process immediately, before it has a chance to kill any other
# zpty processes.
zshexit() {
kill -KILL $$
sleep 1 # Block for long enough for the signal to come through
}
# Output only newlines (not carriage return + newline)
stty -onlcr
# Silence any error messages
exec 2>/dev/null
local strategy=$1
local last_pid
while IFS='' read -r -d $'\0' query; do
# Kill last bg process
kill -KILL $last_pid &>/dev/null
# Run suggestion search in the background
(
local suggestion
_zsh_autosuggest_strategy_$ZSH_AUTOSUGGEST_STRATEGY "$query"
echo -n -E "$suggestion"$'\0'
) &
last_pid=$!
done
}
_zsh_autosuggest_async_request() {
# Write the query to the zpty process to fetch a suggestion
zpty -w -n $ZSH_AUTOSUGGEST_ASYNC_PTY_NAME "${1}"$'\0'
}
# Called when new data is ready to be read from the pty
# First arg will be fd ready for reading
# Second arg will be passed in case of error
_zsh_autosuggest_async_response() {
setopt LOCAL_OPTIONS EXTENDED_GLOB
local suggestion
zpty -rt $ZSH_AUTOSUGGEST_ASYNC_PTY_NAME suggestion '*'$'\0' 2>/dev/null
zle autosuggest-suggest -- "${suggestion%%$'\0'##}"
}
_zsh_autosuggest_async_pty_create() {
# With newer versions of zsh, REPLY stores the fd to read from
typeset -h REPLY
# If we won't get a fd back from zpty, try to guess it
if (( ! $_ZSH_AUTOSUGGEST_ZPTY_RETURNS_FD )); then
integer -l zptyfd
exec {zptyfd}>&1 # Open a new file descriptor (above 10).
exec {zptyfd}>&- # Close it so it's free to be used by zpty.
fi
# Fork a zpty process running the server function
zpty -b $ZSH_AUTOSUGGEST_ASYNC_PTY_NAME "_zsh_autosuggest_async_server _zsh_autosuggest_strategy_$ZSH_AUTOSUGGEST_STRATEGY"
# Store the fd so we can remove the handler later
if (( REPLY )); then
_ZSH_AUTOSUGGEST_PTY_FD=$REPLY
else
_ZSH_AUTOSUGGEST_PTY_FD=$zptyfd
fi
# Set up input handler from the zpty
zle -F $_ZSH_AUTOSUGGEST_PTY_FD _zsh_autosuggest_async_response
}
_zsh_autosuggest_async_pty_destroy() {
if zpty -t $ZSH_AUTOSUGGEST_ASYNC_PTY_NAME &>/dev/null; then
# Remove the input handler
zle -F $_ZSH_AUTOSUGGEST_PTY_FD &>/dev/null
# Destroy the zpty
zpty -d $ZSH_AUTOSUGGEST_ASYNC_PTY_NAME &>/dev/null
fi
}
_zsh_autosuggest_async_pty_recreate() {
_zsh_autosuggest_async_pty_destroy
_zsh_autosuggest_async_pty_create
}
_zsh_autosuggest_async_start() {
typeset -g _ZSH_AUTOSUGGEST_PTY_FD
_zsh_autosuggest_feature_detect_zpty_returns_fd
_zsh_autosuggest_async_pty_recreate
# We recreate the pty to get a fresh list of history events
add-zsh-hook precmd _zsh_autosuggest_async_pty_recreate
}
#--------------------------------------------------------------------#
# Start #
#--------------------------------------------------------------------#
# Start the autosuggestion widgets
_zsh_autosuggest_start() {
add-zsh-hook -d precmd _zsh_autosuggest_start
_zsh_autosuggest_bind_widgets
# Re-bind widgets on every precmd to ensure we wrap other wrappers.
# Specifically, highlighting breaks if our widgets are wrapped by
# zsh-syntax-highlighting widgets. This also allows modifications
# to the widget list variables to take effect on the next precmd.
add-zsh-hook precmd _zsh_autosuggest_bind_widgets
if [[ -n "${ZSH_AUTOSUGGEST_USE_ASYNC+x}" ]]; then
_zsh_autosuggest_async_start
fi
}
# Start the autosuggestion widgets on the next precmd
add-zsh-hook precmd _zsh_autosuggest_start
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