364 lines
12 KiB
Bash
364 lines
12 KiB
Bash
# Fish-like fast/unobtrusive autosuggestions for zsh.
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# https://github.com/zsh-users/zsh-autosuggestions
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# v0.2.16
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# Copyright (c) 2013 Thiago de Arruda
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# Copyright (c) 2016 Eric Freese
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#
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# Permission is hereby granted, free of charge, to any person
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# obtaining a copy of this software and associated documentation
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# files (the "Software"), to deal in the Software without
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# restriction, including without limitation the rights to use,
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# copy, modify, merge, publish, distribute, sublicense, and/or sell
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# copies of the Software, and to permit persons to whom the
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# Software is furnished to do so, subject to the following
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# conditions:
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#
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# The above copyright notice and this permission notice shall be
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# included in all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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# OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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# HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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# WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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# OTHER DEALINGS IN THE SOFTWARE.
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#--------------------------------------------------------------------#
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# Global Configuration Variables #
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#--------------------------------------------------------------------#
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# Color to use when highlighting suggestion
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# Uses format of `region_highlight`
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# More info: http://zsh.sourceforge.net/Doc/Release/Zsh-Line-Editor.html#Zle-Widgets
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ZSH_AUTOSUGGEST_HIGHLIGHT_STYLE='fg=8'
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# Set this to enable matching the history entry preceding the suggestion
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# against the previously executed command.
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# For example, if your have just executed:
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# pwd
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# ls foo
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# ls bar
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# pwd
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# And then you start typing 'ls', then the suggestion will be 'ls foo',
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# rather than 'ls bar', as your most recently executed command (pwd)
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# was succeeded by 'ls foo' on it's previous invocation.
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unset ZSH_AUTOSUGGEST_MATCH_PREV_CMD
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# Prefix to use when saving original versions of bound widgets
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ZSH_AUTOSUGGEST_ORIGINAL_WIDGET_PREFIX=autosuggest-orig-
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# Widgets that clear the suggestion
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ZSH_AUTOSUGGEST_CLEAR_WIDGETS=(
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history-search-forward
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history-search-backward
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history-beginning-search-forward
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history-beginning-search-backward
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up-line-or-history
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down-line-or-history
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accept-line
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)
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# Widgets that accept the entire suggestion
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ZSH_AUTOSUGGEST_ACCEPT_WIDGETS=(
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forward-char
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end-of-line
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vi-forward-char
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vi-end-of-line
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)
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# Widgets that accept the suggestion as far as the cursor moves
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ZSH_AUTOSUGGEST_PARTIAL_ACCEPT_WIDGETS=(
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forward-word
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vi-forward-word
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vi-forward-word-end
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vi-forward-blank-word
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vi-forward-blank-word-end
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)
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#--------------------------------------------------------------------#
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# Handle Deprecated Variables/Widgets #
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#--------------------------------------------------------------------#
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_zsh_autosuggest_deprecated_warning() {
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>&2 echo "zsh-autosuggestions: $@"
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}
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_zsh_autosuggest_check_deprecated_config() {
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if [ -n "$AUTOSUGGESTION_HIGHLIGHT_COLOR" ]; then
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_zsh_autosuggest_deprecated_warning "AUTOSUGGESTION_HIGHLIGHT_COLOR is deprecated. Use ZSH_AUTOSUGGEST_HIGHLIGHT_STYLE instead."
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[ -z "$ZSH_AUTOSUGGEST_HIGHLIGHT_STYLE" ] && ZSH_AUTOSUGGEST_HIGHLIGHT_STYLE=$AUTOSUGGESTION_HIGHLIGHT_STYLE
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unset AUTOSUGGESTION_HIGHLIGHT_STYLE
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fi
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if [ -n "$AUTOSUGGESTION_HIGHLIGHT_CURSOR" ]; then
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_zsh_autosuggest_deprecated_warning "AUTOSUGGESTION_HIGHLIGHT_CURSOR is deprecated."
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unset AUTOSUGGESTION_HIGHLIGHT_CURSOR
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fi
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if [ -n "$AUTOSUGGESTION_ACCEPT_RIGHT_ARROW" ]; then
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_zsh_autosuggest_deprecated_warning "AUTOSUGGESTION_ACCEPT_RIGHT_ARROW is deprecated. The right arrow now accepts the suggestion by default."
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unset AUTOSUGGESTION_ACCEPT_RIGHT_ARROW
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fi
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}
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_zsh_autosuggest_deprecated_start_widget() {
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_zsh_autosuggest_deprecated_warning "The autosuggest-start widget is deprecated. For more info, see the README at https://github.com/zsh-users/zsh-autosuggestions."
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zle -D autosuggest-start
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eval "zle-line-init() {
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$(echo $functions[${widgets[zle-line-init]#*:}] | sed -e 's/zle autosuggest-start//g')
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}"
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}
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zle -N autosuggest-start _zsh_autosuggest_deprecated_start_widget
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#--------------------------------------------------------------------#
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# Widget Helpers #
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#--------------------------------------------------------------------#
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# Bind a single widget to an autosuggest widget, saving a reference to the original widget
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_zsh_autosuggest_bind_widget() {
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local widget=$1
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local autosuggest_action=$2
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local prefix=$ZSH_AUTOSUGGEST_ORIGINAL_WIDGET_PREFIX
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# Save a reference to the original widget
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case $widgets[$widget] in
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# Already bound
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user:_zsh_autosuggest_(bound|orig)_*);;
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# User-defined widget
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user:*)
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zle -N $prefix$widget ${widgets[$widget]#*:}
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;;
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# Built-in widget
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builtin)
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eval "_zsh_autosuggest_orig_$widget() { zle .$widget }"
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zle -N $prefix$widget _zsh_autosuggest_orig_$widget
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;;
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# Completion widget
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completion:*)
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eval "zle -C $prefix$widget ${${widgets[$widget]#*:}/:/ }"
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;;
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esac
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# Pass the original widget's name explicitly into the autosuggest
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# function. Use this passed in widget name to call the original
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# widget instead of relying on the $WIDGET variable being set
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# correctly. $WIDGET cannot be trusted because other plugins call
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# zle without the `-w` flag (e.g. `zle self-insert` instead of
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# `zle self-insert -w`).
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eval "_zsh_autosuggest_bound_$widget() {
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_zsh_autosuggest_widget_$autosuggest_action $prefix$widget \$@
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}"
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# Create the bound widget
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zle -N $widget _zsh_autosuggest_bound_$widget
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}
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# Map all configured widgets to the right autosuggest widgets
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_zsh_autosuggest_bind_widgets() {
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local widget;
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# Find every widget we might want to bind and bind it appropriately
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for widget in ${${(f)"$(builtin zle -la)"}:#(.*|_*|orig-*|autosuggest-*|$ZSH_AUTOSUGGEST_ORIGINAL_WIDGET_PREFIX*|zle-line-*|run-help|which-command|beep|set-local-history|yank)}; do
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if [ ${ZSH_AUTOSUGGEST_CLEAR_WIDGETS[(r)$widget]} ]; then
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_zsh_autosuggest_bind_widget $widget clear
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elif [ ${ZSH_AUTOSUGGEST_ACCEPT_WIDGETS[(r)$widget]} ]; then
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_zsh_autosuggest_bind_widget $widget accept
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elif [ ${ZSH_AUTOSUGGEST_PARTIAL_ACCEPT_WIDGETS[(r)$widget]} ]; then
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_zsh_autosuggest_bind_widget $widget partial_accept
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else
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# Assume any unspecified widget might modify the buffer
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_zsh_autosuggest_bind_widget $widget modify
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fi
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done
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}
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# Given the name of an original widget and args, invoke it, if it exists
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_zsh_autosuggest_invoke_original_widget() {
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# Do nothing unless called with at least one arg
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[ $# -gt 0 ] || return
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local original_widget_name=$1
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shift
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if [ $widgets[$original_widget_name] ]; then
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zle $original_widget_name -- $@
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fi
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}
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#--------------------------------------------------------------------#
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# Highlighting #
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#--------------------------------------------------------------------#
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# If there was a highlight, remove it
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_zsh_autosuggest_highlight_reset() {
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if [ -n "$_ZSH_AUTOSUGGEST_LAST_HIGHLIGHT" ]; then
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region_highlight=("${(@)region_highlight:#$_ZSH_AUTOSUGGEST_LAST_HIGHLIGHT}")
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unset _ZSH_AUTOSUGGEST_LAST_HIGHLIGHT
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fi
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}
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# If there's a suggestion, highlight it
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_zsh_autosuggest_highlight_apply() {
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if [ $#POSTDISPLAY -gt 0 ]; then
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_ZSH_AUTOSUGGEST_LAST_HIGHLIGHT="$#BUFFER $(($#BUFFER + $#POSTDISPLAY)) $ZSH_AUTOSUGGEST_HIGHLIGHT_STYLE"
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region_highlight+=("$_ZSH_AUTOSUGGEST_LAST_HIGHLIGHT")
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else
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unset _ZSH_AUTOSUGGEST_LAST_HIGHLIGHT
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fi
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}
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#--------------------------------------------------------------------#
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# Autosuggest Widget Implementations #
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#--------------------------------------------------------------------#
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# Clear the suggestion
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_zsh_autosuggest_clear() {
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# Remove the suggestion
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unset POSTDISPLAY
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_zsh_autosuggest_invoke_original_widget $@
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}
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# Modify the buffer and get a new suggestion
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_zsh_autosuggest_modify() {
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# Original widget modifies the buffer
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_zsh_autosuggest_invoke_original_widget $@
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# Get a new suggestion if the buffer is not empty after modification
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local suggestion
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if [ $#BUFFER -gt 0 ]; then
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suggestion=$(_zsh_autosuggest_suggestion "$BUFFER")
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fi
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# Add the suggestion to the POSTDISPLAY
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if [ -n "$suggestion" ]; then
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POSTDISPLAY=${suggestion#$BUFFER}
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else
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unset POSTDISPLAY
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fi
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}
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# Accept the entire suggestion
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_zsh_autosuggest_accept() {
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# Only accept if the cursor is at the end of the buffer
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if [ $CURSOR -eq $#BUFFER ]; then
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# Add the suggestion to the buffer
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BUFFER="$BUFFER$POSTDISPLAY"
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# Remove the suggestion
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unset POSTDISPLAY
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# Move the cursor to the end of the buffer
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CURSOR=${#BUFFER}
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fi
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_zsh_autosuggest_invoke_original_widget $@
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}
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# Partially accept the suggestion
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_zsh_autosuggest_partial_accept() {
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# Save the contents of the buffer so we can restore later if needed
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local original_buffer=$BUFFER
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# Temporarily accept the suggestion.
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BUFFER="$BUFFER$POSTDISPLAY"
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# Original widget moves the cursor
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_zsh_autosuggest_invoke_original_widget $@
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# If we've moved past the end of the original buffer
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if [ $CURSOR -gt $#original_buffer ]; then
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# Set POSTDISPLAY to text right of the cursor
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POSTDISPLAY=$RBUFFER
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# Clip the buffer at the cursor
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BUFFER=$LBUFFER
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else
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# Restore the original buffer
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BUFFER=$original_buffer
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fi
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}
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for action in clear modify accept partial_accept; do
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eval "_zsh_autosuggest_widget_$action() {
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_zsh_autosuggest_highlight_reset
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_zsh_autosuggest_$action \$@
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_zsh_autosuggest_highlight_apply
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}"
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done
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zle -N autosuggest-accept _zsh_autosuggest_widget_accept
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zle -N autosuggest-clear _zsh_autosuggest_widget_clear
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#--------------------------------------------------------------------#
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# Suggestion #
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#--------------------------------------------------------------------#
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# Get the peviously executed command (hookable for testing)
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_zsh_autosuggest_prev_cmd() {
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echo -E "${history[$((HISTCMD-1))]}"
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}
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# Get a suggestion from history that matches a given prefix
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_zsh_autosuggest_suggestion() {
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local prefix="$(_zsh_autosuggest_escape_command_prefix "$1")"
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# Get all history event numbers (reversed) that correspond to history
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# entries that match pattern $prefix*
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local history_match_keys
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history_match_keys=(${(k)history[(R)$prefix*]})
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# By default we use the first history number (most recent history entry)
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local history_key="$history_match_keys[1]"
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# If matching on the previous command is enabled ...
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if (( ${+ZSH_AUTOSUGGEST_MATCH_PREV_CMD} )); then
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# Get the previously executed command
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local prev_cmd="$(_zsh_autosuggest_prev_cmd)"
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prev_cmd="$(_zsh_autosuggest_escape_command_prefix $prev_cmd)"
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# Iterate up to the first 200 history event numbers that match $prefix
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for key in "${(@)history_match_keys[1,200]}"; do
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# Stop if we ran out of history
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[[ $key -gt 1 ]] || break
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# See if the history entry preceding the suggestion matches the
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# previous command, and use it if it does
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if [[ "${history[$((key - 1))]}" == $prev_cmd ]]; then
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history_key=$key
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break
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fi
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done
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fi
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# Echo the matched history entry
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echo -E "$history[$history_key]"
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}
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_zsh_autosuggest_escape_command_prefix() {
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setopt localoptions EXTENDED_GLOB
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# Escape special chars in the string (requires EXTENDED_GLOB)
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echo -E "${1//(#m)[\\()\[\]|*?]/\\$MATCH}"
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}
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#--------------------------------------------------------------------#
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# Start #
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#--------------------------------------------------------------------#
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# Start the autosuggestion widgets
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_zsh_autosuggest_start() {
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_zsh_autosuggest_check_deprecated_config
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_zsh_autosuggest_bind_widgets
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}
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autoload -Uz add-zsh-hook
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add-zsh-hook precmd _zsh_autosuggest_start
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