256 lines
10 KiB
Bash
256 lines
10 KiB
Bash
#!/usr/bin/env zsh
|
|
# -------------------------------------------------------------------------------------------------
|
|
# Copyright (c) 2010-2015 zsh-syntax-highlighting contributors
|
|
# All rights reserved.
|
|
#
|
|
# Redistribution and use in source and binary forms, with or without modification, are permitted
|
|
# provided that the following conditions are met:
|
|
#
|
|
# * Redistributions of source code must retain the above copyright notice, this list of conditions
|
|
# and the following disclaimer.
|
|
# * Redistributions in binary form must reproduce the above copyright notice, this list of
|
|
# conditions and the following disclaimer in the documentation and/or other materials provided
|
|
# with the distribution.
|
|
# * Neither the name of the zsh-syntax-highlighting contributors nor the names of its contributors
|
|
# may be used to endorse or promote products derived from this software without specific prior
|
|
# written permission.
|
|
#
|
|
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
|
|
# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
|
|
# FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
|
|
# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
|
|
# IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
|
|
# OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
# -------------------------------------------------------------------------------------------------
|
|
# -*- mode: zsh; sh-indentation: 2; indent-tabs-mode: nil; sh-basic-offset: 2; -*-
|
|
# vim: ft=zsh sw=2 ts=2 et
|
|
# -------------------------------------------------------------------------------------------------
|
|
|
|
|
|
# -------------------------------------------------------------------------------------------------
|
|
# Core highlighting update system
|
|
# -------------------------------------------------------------------------------------------------
|
|
|
|
# Array declaring active highlighters names.
|
|
typeset -ga ZSH_HIGHLIGHT_HIGHLIGHTERS
|
|
|
|
# Update ZLE buffer syntax highlighting.
|
|
#
|
|
# Invokes each highlighter that needs updating.
|
|
# This function is supposed to be called whenever the ZLE state changes.
|
|
_zsh_highlight()
|
|
{
|
|
# Store the previous command return code to restore it whatever happens.
|
|
local ret=$?
|
|
|
|
setopt localoptions warncreateglobal
|
|
|
|
# Do not highlight if there are more than 300 chars in the buffer. It's most
|
|
# likely a pasted command or a huge list of files in that case..
|
|
[[ -n ${ZSH_HIGHLIGHT_MAXLENGTH:-} ]] && [[ $#BUFFER -gt $ZSH_HIGHLIGHT_MAXLENGTH ]] && return $ret
|
|
|
|
# Do not highlight if there are pending inputs (copy/paste).
|
|
[[ $PENDING -gt 0 ]] && return $ret
|
|
|
|
# Reset region highlight to build it from scratch
|
|
typeset -ga region_highlight
|
|
region_highlight=();
|
|
|
|
{
|
|
local cache_place
|
|
local -a region_highlight_copy
|
|
|
|
# Select which highlighters in ZSH_HIGHLIGHT_HIGHLIGHTERS need to be invoked.
|
|
local highlighter; for highlighter in $ZSH_HIGHLIGHT_HIGHLIGHTERS; do
|
|
|
|
# eval cache place for current highlighter and prepare it
|
|
cache_place="_zsh_highlight_${highlighter}_highlighter_cache"
|
|
typeset -ga ${cache_place}
|
|
|
|
# If highlighter needs to be invoked
|
|
if "_zsh_highlight_${highlighter}_highlighter_predicate"; then
|
|
|
|
# save a copy, and cleanup region_highlight
|
|
region_highlight_copy=("${region_highlight[@]}")
|
|
region_highlight=()
|
|
|
|
# Execute highlighter and save result
|
|
{
|
|
"_zsh_highlight_${highlighter}_highlighter"
|
|
} always {
|
|
eval "${cache_place}=(\"\${region_highlight[@]}\")"
|
|
}
|
|
|
|
# Restore saved region_highlight
|
|
region_highlight=("${region_highlight_copy[@]}")
|
|
|
|
fi
|
|
|
|
# Use value form cache if any cached
|
|
eval "region_highlight+=(\"\${${cache_place}[@]}\")"
|
|
|
|
done
|
|
|
|
# Re-apply zle_highlight settings
|
|
() {
|
|
if (( REGION_ACTIVE )) ; then
|
|
# zle_highlight[region] defaults to 'standout' if unspecified
|
|
local region="${${zle_highlight[(r)region:*]#region:}:-standout}"
|
|
integer start end
|
|
if (( MARK > CURSOR )) ; then
|
|
start=$CURSOR end=$MARK
|
|
else
|
|
start=$MARK end=$CURSOR
|
|
fi
|
|
region_highlight+=("$start $end $region")
|
|
fi
|
|
}
|
|
# YANK_ACTIVE is only available in zsh-5.1.1 and newer
|
|
(( $+YANK_ACTIVE )) && () {
|
|
if (( YANK_ACTIVE )) ; then
|
|
# zle_highlight[paste] defaults to 'standout' if unspecified
|
|
local paste="${${zle_highlight[(r)paste:*]#paste:}:-standout}"
|
|
integer start end
|
|
if (( YANK_END > YANK_START )) ; then
|
|
start=$YANK_START end=$YANK_END
|
|
else
|
|
start=$YANK_END end=$YANK_START
|
|
fi
|
|
region_highlight+=("$start $end $paste")
|
|
fi
|
|
}
|
|
|
|
return $ret
|
|
|
|
|
|
} always {
|
|
typeset -g _ZSH_HIGHLIGHT_PRIOR_BUFFER="$BUFFER"
|
|
typeset -gi _ZSH_HIGHLIGHT_PRIOR_CURSOR=$CURSOR
|
|
}
|
|
}
|
|
|
|
|
|
# -------------------------------------------------------------------------------------------------
|
|
# API/utility functions for highlighters
|
|
# -------------------------------------------------------------------------------------------------
|
|
|
|
# Array used by highlighters to declare user overridable styles.
|
|
typeset -gA ZSH_HIGHLIGHT_STYLES
|
|
|
|
# Whether the command line buffer has been modified or not.
|
|
#
|
|
# Returns 0 if the buffer has changed since _zsh_highlight was last called.
|
|
_zsh_highlight_buffer_modified()
|
|
{
|
|
[[ "${_ZSH_HIGHLIGHT_PRIOR_BUFFER:-}" != "$BUFFER" ]]
|
|
}
|
|
|
|
# Whether the cursor has moved or not.
|
|
#
|
|
# Returns 0 if the cursor has moved since _zsh_highlight was last called.
|
|
_zsh_highlight_cursor_moved()
|
|
{
|
|
[[ -n $CURSOR ]] && [[ -n ${_ZSH_HIGHLIGHT_PRIOR_CURSOR-} ]] && (($_ZSH_HIGHLIGHT_PRIOR_CURSOR != $CURSOR))
|
|
}
|
|
|
|
|
|
# -------------------------------------------------------------------------------------------------
|
|
# Setup functions
|
|
# -------------------------------------------------------------------------------------------------
|
|
|
|
# Rebind all ZLE widgets to make them invoke _zsh_highlights.
|
|
_zsh_highlight_bind_widgets()
|
|
{
|
|
# Load ZSH module zsh/zleparameter, needed to override user defined widgets.
|
|
zmodload zsh/zleparameter 2>/dev/null || {
|
|
echo 'zsh-syntax-highlighting: failed loading zsh/zleparameter.' >&2
|
|
return 1
|
|
}
|
|
|
|
# Override ZLE widgets to make them invoke _zsh_highlight.
|
|
local cur_widget
|
|
for cur_widget in ${${(f)"$(builtin zle -la)"}:#(.*|_*|orig-*|run-help|which-command|beep|yank-pop|set-local-history)}; do
|
|
case $widgets[$cur_widget] in
|
|
|
|
# Already rebound event: do nothing.
|
|
user:$cur_widget|user:_zsh_highlight_widget_*);;
|
|
|
|
# User defined widget: override and rebind old one with prefix "orig-".
|
|
user:*) eval "zle -N orig-$cur_widget ${widgets[$cur_widget]#*:}; \
|
|
_zsh_highlight_widget_$cur_widget() { builtin zle orig-$cur_widget -- \"\$@\" && _zsh_highlight }; \
|
|
zle -N $cur_widget _zsh_highlight_widget_$cur_widget";;
|
|
|
|
# Completion widget: override and rebind old one with prefix "orig-".
|
|
completion:*) eval "zle -C orig-$cur_widget ${${widgets[$cur_widget]#*:}/:/ }; \
|
|
_zsh_highlight_widget_$cur_widget() { builtin zle orig-$cur_widget -- \"\$@\" && _zsh_highlight }; \
|
|
zle -N $cur_widget _zsh_highlight_widget_$cur_widget";;
|
|
|
|
# Builtin widget: override and make it call the builtin ".widget".
|
|
builtin) eval "_zsh_highlight_widget_$cur_widget() { builtin zle .$cur_widget -- \"\$@\" && _zsh_highlight }; \
|
|
zle -N $cur_widget _zsh_highlight_widget_$cur_widget";;
|
|
|
|
# Default: unhandled case.
|
|
*) echo "zsh-syntax-highlighting: unhandled ZLE widget '$cur_widget'" >&2 ;;
|
|
esac
|
|
done
|
|
}
|
|
|
|
# Load highlighters from directory.
|
|
#
|
|
# Arguments:
|
|
# 1) Path to the highlighters directory.
|
|
_zsh_highlight_load_highlighters()
|
|
{
|
|
# Check the directory exists.
|
|
[[ -d "$1" ]] || {
|
|
echo "zsh-syntax-highlighting: highlighters directory '$1' not found." >&2
|
|
return 1
|
|
}
|
|
|
|
# Load highlighters from highlighters directory and check they define required functions.
|
|
local highlighter highlighter_dir
|
|
for highlighter_dir ($1/*/); do
|
|
highlighter="${highlighter_dir:t}"
|
|
[[ -f "$highlighter_dir/${highlighter}-highlighter.zsh" ]] && {
|
|
. "$highlighter_dir/${highlighter}-highlighter.zsh"
|
|
type "_zsh_highlight_${highlighter}_highlighter" &> /dev/null &&
|
|
type "_zsh_highlight_${highlighter}_highlighter_predicate" &> /dev/null || {
|
|
echo "zsh-syntax-highlighting: '${highlighter}' highlighter should define both required functions '_zsh_highlight_${highlighter}_highlighter' and '_zsh_highlight_${highlighter}_highlighter_predicate' in '${highlighter_dir}/${highlighter}-highlighter.zsh'." >&2
|
|
}
|
|
}
|
|
done
|
|
}
|
|
|
|
|
|
# -------------------------------------------------------------------------------------------------
|
|
# Setup
|
|
# -------------------------------------------------------------------------------------------------
|
|
|
|
# Try binding widgets.
|
|
_zsh_highlight_bind_widgets || {
|
|
echo 'zsh-syntax-highlighting: failed binding ZLE widgets, exiting.' >&2
|
|
return 1
|
|
}
|
|
|
|
# Resolve highlighters directory location.
|
|
_zsh_highlight_load_highlighters "${ZSH_HIGHLIGHT_HIGHLIGHTERS_DIR:-${${0:A}:h}/highlighters}" || {
|
|
echo 'zsh-syntax-highlighting: failed loading highlighters, exiting.' >&2
|
|
return 1
|
|
}
|
|
|
|
# Reset scratch variables when commandline is done.
|
|
_zsh_highlight_preexec_hook()
|
|
{
|
|
typeset -g _ZSH_HIGHLIGHT_PRIOR_BUFFER=
|
|
typeset -gi _ZSH_HIGHLIGHT_PRIOR_CURSOR=
|
|
}
|
|
autoload -U add-zsh-hook
|
|
add-zsh-hook preexec _zsh_highlight_preexec_hook 2>/dev/null || {
|
|
echo 'zsh-syntax-highlighting: failed loading add-zsh-hook.' >&2
|
|
}
|
|
|
|
# Initialize the array of active highlighters if needed.
|
|
[[ $#ZSH_HIGHLIGHT_HIGHLIGHTERS -eq 0 ]] && ZSH_HIGHLIGHT_HIGHLIGHTERS=(main) || true
|