178 lines
7.3 KiB
Bash
178 lines
7.3 KiB
Bash
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#!/usr/bin/env zsh
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# -------------------------------------------------------------------------------------------------
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# Copyright (c) 2010-2011 zsh-syntax-highlighting contributors
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without modification, are permitted
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# provided that the following conditions are met:
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#
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# * Redistributions of source code must retain the above copyright notice, this list of conditions
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# and the following disclaimer.
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# * Redistributions in binary form must reproduce the above copyright notice, this list of
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# conditions and the following disclaimer in the documentation and/or other materials provided
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# with the distribution.
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# * Neither the name of the zsh-syntax-highlighting contributors nor the names of its contributors
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# may be used to endorse or promote products derived from this software without specific prior
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# written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
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# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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# FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
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# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
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# IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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# OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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# -------------------------------------------------------------------------------------------------
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# -*- mode: zsh; sh-indentation: 2; indent-tabs-mode: nil; sh-basic-offset: 2; -*-
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# vim: ft=zsh sw=2 ts=2 et
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# -------------------------------------------------------------------------------------------------
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# -------------------------------------------------------------------------------------------------
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# Core highlighting update system
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# -------------------------------------------------------------------------------------------------
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# Array declaring active highlighters names.
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typeset -ga ZSH_HIGHLIGHT_HIGHLIGHTERS
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# Update ZLE buffer syntax highlighting.
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#
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# Invokes each highlighter that needs updating.
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# This function is supposed to be called whenever the ZLE state changes.
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_zsh_highlight()
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{
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setopt localoptions nowarncreateglobal
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# Store the previous command return code to restore it whatever happens.
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local ret=$?
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# Do not highlight if there are pending inputs (copy/paste).
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[[ $PENDING -gt 0 ]] && return $ret
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{
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local -a selected_highlighters
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local cache_place
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# Select which highlighters in ZSH_HIGHLIGHT_HIGHLIGHTERS need to be invoked.
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local highlighter; for highlighter in $ZSH_HIGHLIGHT_HIGHLIGHTERS; do
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# If highlighter needs to be invoked
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if "_zsh_highlight_${highlighter}_highlighter_predicate"; then
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# Mark the highlighter as selected for update.
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selected_highlighters+=($highlighter)
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# Remove what was stored in its cache from region_highlight.
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cache_place="_zsh_highlight_${highlighter}_highlighter_cache"
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[[ ${#${(P)cache_place}} -gt 0 ]] && region_highlight=(${region_highlight:#(${(P~j.|.)cache_place})})
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fi
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done
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# Invoke each selected highlighter and store the result in its cache.
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local -a region_highlight_copy
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for highlighter in $selected_highlighters; do
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cache_place="_zsh_highlight_${highlighter}_highlighter_cache"
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region_highlight_copy=($region_highlight)
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{
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"_zsh_highlight_${highlighter}_highlighter"
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} always {
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: ${(PA)cache_place::=${region_highlight:#(${(~j.|.)region_highlight_copy})}}
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}
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done
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} always {
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_ZSH_HIGHLIGHT_PRIOR_BUFFER=$BUFFER
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_ZSH_HIGHLIGHT_PRIOR_CURSOR=$CURSOR
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return $ret
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}
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}
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# -------------------------------------------------------------------------------------------------
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# API/utility functions for highlighters
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# -------------------------------------------------------------------------------------------------
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# Array used by highlighters to declare user overridable styles.
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typeset -gA ZSH_HIGHLIGHT_STYLES
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# Whether the command line buffer has been modified or not.
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#
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# Returns 0 if the buffer has changed since _zsh_highlight was last called.
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_zsh_highlight_buffer_modified()
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{
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[[ ${_ZSH_HIGHLIGHT_PRIOR_BUFFER:-} != $BUFFER ]]
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}
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# Whether the cursor has moved or not.
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#
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# Returns 0 if the cursor has moved since _zsh_highlight was last called.
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_zsh_highlight_cursor_moved()
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{
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[[ -n $CURSOR ]] && [[ -n $_ZSH_HIGHLIGHT_PRIOR_CURSOR ]] && (($_ZSH_HIGHLIGHT_PRIOR_CURSOR != $CURSOR))
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}
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# -------------------------------------------------------------------------------------------------
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# Setup
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# -------------------------------------------------------------------------------------------------
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# Load ZSH module zsh/zleparameter, needed to override user defined widgets.
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zmodload zsh/zleparameter 2>/dev/null || {
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echo 'zsh-syntax-highlighting: failed loading zsh/zleparameter, exiting.' >&2
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return -1
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}
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# Resolve highlighters directory location.
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highlighters_dir="${ZSH_HIGHLIGHT_HIGHLIGHTERS_DIR:-${${(%):-%N}:A:h}/highlighters}"
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[[ -d $highlighters_dir ]] || {
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echo "zsh-syntax-highlighting: highlighters directory '$highlighters_dir' not found, exiting." >&2
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return -1
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}
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# Override ZLE widgets to make them invoke _zsh_highlight.
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for event in ${${(f)"$(zle -la)"}:#(_*|orig-*|.run-help|.which-command)}; do
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if [[ "$widgets[$event]" == completion:* ]]; then
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eval "zle -C orig-$event ${${${widgets[$event]}#*:}/:/ } ; $event() { builtin zle orig-$event && _zsh_highlight } ; zle -N $event"
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else
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case $event in
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accept-and-menu-complete)
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eval "$event() { builtin zle .$event && _zsh_highlight } ; zle -N $event"
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;;
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.*)
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clean_event=$event[2,${#event}] # Remove the leading dot in the event name
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case ${widgets[$clean_event]-} in
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(completion|user):*)
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;;
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*)
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eval "$clean_event() { builtin zle $event && _zsh_highlight } ; zle -N $clean_event"
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;;
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esac
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;;
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*)
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;;
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esac
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fi
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done
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unset event clean_event
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# Start highlighting immediately after the creation of a new command line.
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autoload add-zsh-hook && add-zsh-hook precmd _zsh_highlight
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# Load highlighters from highlighters directory and check they define required functions.
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for highlighter_dir ($highlighters_dir/*/); do
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highlighter="${highlighter_dir:t}"
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[[ -f "$highlighter_dir/${highlighter}-highlighter.zsh" ]] && {
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. "$highlighter_dir/${highlighter}-highlighter.zsh"
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type "_zsh_highlight_${highlighter}_highlighter" &> /dev/null &&
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type "_zsh_highlight_${highlighter}_highlighter_predicate" &> /dev/null || {
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echo "zsh-syntax-highlighting: '${highlighter}' highlighter should define both required functions '_zsh_highlight_${highlighter}_highlighter' and '_zsh_highlight_${highlighter}_highlighter_predicate' in '${highlighter_dir}/${highlighter}-highlighter.zsh'." >&2
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}
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}
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done
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unset highlighter highlighter_dir highlighters_dir
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# Initialize the array of active highlighters if needed.
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[[ $#ZSH_HIGHLIGHT_HIGHLIGHTERS -eq 0 ]] && ZSH_HIGHLIGHT_HIGHLIGHTERS=(main)
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