466 lines
18 KiB
Bash
466 lines
18 KiB
Bash
# -------------------------------------------------------------------------------------------------
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# Copyright (c) 2010-2016 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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# First of all, ensure predictable parsing.
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zsh_highlight__aliases=`builtin alias -Lm '[^+]*'`
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# In zsh <= 5.2, `alias -L` emits aliases that begin with a plus sign ('alias -- +foo=42')
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# them without a '--' guard, so they don't round trip.
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#
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# Hence, we exclude them from unaliasing:
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builtin unalias -m '[^+]*'
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# Set $0 to the expected value, regardless of functionargzero.
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0=${(%):-%N}
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if true; then
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# $0 is reliable
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typeset -g ZSH_HIGHLIGHT_VERSION=$(<"${0:A:h}"/.version)
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typeset -g ZSH_HIGHLIGHT_REVISION=$(<"${0:A:h}"/.revision-hash)
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if [[ $ZSH_HIGHLIGHT_REVISION == \$Format:* ]]; then
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# When running from a source tree without 'make install', $ZSH_HIGHLIGHT_REVISION
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# would be set to '$Format:%H$' literally. That's an invalid value, and obtaining
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# the valid value (via `git rev-parse HEAD`, as Makefile does) might be costly, so:
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ZSH_HIGHLIGHT_REVISION=HEAD
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fi
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fi
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integer zsh_highlight_use_redrawhook
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if autoload -U +X -- add-zle-hook-widget 2>/dev/null;
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[[ "${${(@f)"$(which -- add-zle-hook-widget)"}[2]}" != $'\t'$histchars[3]' undefined' ]];
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then
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(( zsh_highlight_use_redrawhook=1 ))
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fi
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# -------------------------------------------------------------------------------------------------
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# Core highlighting update system
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# -------------------------------------------------------------------------------------------------
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# Use workaround for bug in ZSH?
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# zsh-users/zsh@48cadf4 http://www.zsh.org/mla/workers//2017/msg00034.html
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autoload -Uz is-at-least
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if is-at-least 5.4; then
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zsh_highlight__pat_static_bug=false
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else
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zsh_highlight__pat_static_bug=true
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fi
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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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# Store the previous command return code to restore it whatever happens.
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local ret=$?
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# Remove all highlighting in isearch, so that only the underlining done by zsh itself remains.
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# For details see FAQ entry 'Why does syntax highlighting not work while searching history?'.
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# This disables highlighting during isearch (for reasons explained in README.md) unless zsh is new enough
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# and doesn't have the pattern matching bug
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if [[ $WIDGET == zle-isearch-update ]] && { $zsh_highlight__pat_static_bug || ! (( $+ISEARCHMATCH_ACTIVE )) }; then
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region_highlight=()
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return $ret
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fi
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# Before we 'emulate -L', save the user's options
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local -A zsyh_user_options
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if zmodload -e zsh/parameter; then
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zsyh_user_options=("${(@kv)options}")
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else
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local canonical_options onoff option raw_options
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raw_options=(${(f)"$(emulate -R zsh; set -o)"})
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canonical_options=(${${${(M)raw_options:#*off}%% *}#no} ${${(M)raw_options:#*on}%% *})
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for option in $canonical_options; do
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[[ -o $option ]]
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# This variable cannot be eliminated c.f. workers/42101.
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onoff=${${=:-off on}[2-$?]}
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zsyh_user_options+=($option $onoff)
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done
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fi
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typeset -r zsyh_user_options
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emulate -L zsh
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setopt localoptions warncreateglobal
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local REPLY # don't leak $REPLY into global scope
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# Do not highlight if there are more than 300 chars in the buffer. It's most
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# likely a pasted command or a huge list of files in that case..
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[[ -n ${ZSH_HIGHLIGHT_MAXLENGTH:-} ]] && [[ $#BUFFER -gt $ZSH_HIGHLIGHT_MAXLENGTH ]] && return $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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# Reset region highlight to build it from scratch
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typeset -ga region_highlight
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region_highlight=();
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{
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local cache_place
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local -a region_highlight_copy
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# Select which highlighters in ZSH_HIGHLIGHT_HIGHLIGHTERS need to be invoked.
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local highlighter; for highlighter in $ZSH_HIGHLIGHT_HIGHLIGHTERS; do
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# eval cache place for current highlighter and prepare it
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cache_place="_zsh_highlight__highlighter_${highlighter}_cache"
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typeset -ga ${cache_place}
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# If highlighter needs to be invoked
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if ! type "_zsh_highlight_highlighter_${highlighter}_predicate" >&/dev/null; then
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echo "zsh-syntax-highlighting: warning: disabling the ${(qq)highlighter} highlighter as it has not been loaded" >&2
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# TODO: use ${(b)} rather than ${(q)} if supported
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ZSH_HIGHLIGHT_HIGHLIGHTERS=( ${ZSH_HIGHLIGHT_HIGHLIGHTERS:#${highlighter}} )
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elif "_zsh_highlight_highlighter_${highlighter}_predicate"; then
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# save a copy, and cleanup region_highlight
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region_highlight_copy=("${region_highlight[@]}")
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region_highlight=()
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# Execute highlighter and save result
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{
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"_zsh_highlight_highlighter_${highlighter}_paint"
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} always {
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: ${(AP)cache_place::="${region_highlight[@]}"}
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}
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# Restore saved region_highlight
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region_highlight=("${region_highlight_copy[@]}")
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fi
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# Use value form cache if any cached
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region_highlight+=("${(@P)cache_place}")
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done
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# Re-apply zle_highlight settings
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# region
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if (( REGION_ACTIVE == 1 )); then
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_zsh_highlight_apply_zle_highlight region standout "$MARK" "$CURSOR"
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elif (( REGION_ACTIVE == 2 )); then
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() {
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local needle=$'\n'
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integer min max
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if (( MARK > CURSOR )) ; then
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min=$CURSOR max=$MARK
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else
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min=$MARK max=$CURSOR
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fi
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# CURSOR and MARK are 0 indexed between letters like region_highlight
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# Do not include the newline in the highlight
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(( min = ${BUFFER[(Ib:min:)$needle]} ))
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(( max = ${BUFFER[(ib:max:)$needle]} - 1 ))
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_zsh_highlight_apply_zle_highlight region standout "$min" "$max"
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}
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fi
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# yank / paste (zsh-5.1.1 and newer)
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(( $+YANK_ACTIVE )) && (( YANK_ACTIVE )) && _zsh_highlight_apply_zle_highlight paste standout "$YANK_START" "$YANK_END"
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# isearch
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(( $+ISEARCHMATCH_ACTIVE )) && (( ISEARCHMATCH_ACTIVE )) && _zsh_highlight_apply_zle_highlight isearch underline "$ISEARCHMATCH_START" "$ISEARCHMATCH_END"
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# suffix
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(( $+SUFFIX_ACTIVE )) && (( SUFFIX_ACTIVE )) && _zsh_highlight_apply_zle_highlight suffix bold "$SUFFIX_START" "$SUFFIX_END"
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return $ret
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} always {
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typeset -g _ZSH_HIGHLIGHT_PRIOR_BUFFER="$BUFFER"
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typeset -gi _ZSH_HIGHLIGHT_PRIOR_CURSOR=$CURSOR
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}
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}
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# Apply highlighting based on entries in the zle_highlight array.
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# This function takes four arguments:
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# 1. The exact entry (no patterns) in the zle_highlight array:
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# region, paste, isearch, or suffix
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# 2. The default highlighting that should be applied if the entry is unset
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# 3. and 4. Two integer values describing the beginning and end of the
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# range. The order does not matter.
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_zsh_highlight_apply_zle_highlight() {
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local entry="$1" default="$2"
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integer first="$3" second="$4"
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# read the relevant entry from zle_highlight
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#
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# ### In zsh≥5.0.8 we'd use ${(b)entry}, but we support older zsh's, so we don't
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# ### add (b). The only effect is on the failure mode for callers that violate
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# ### the precondition.
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local region="${zle_highlight[(r)${entry}:*]-}"
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if [[ -z "$region" ]]; then
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# entry not specified at all, use default value
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region=$default
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else
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# strip prefix
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region="${region#${entry}:}"
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# no highlighting when set to the empty string or to 'none'
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if [[ -z "$region" ]] || [[ "$region" == none ]]; then
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return
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fi
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fi
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integer start end
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if (( first < second )); then
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start=$first end=$second
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else
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start=$second end=$first
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fi
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region_highlight+=("$start $end $region")
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}
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# -------------------------------------------------------------------------------------------------
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# API/utility functions for highlighters
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# -------------------------------------------------------------------------------------------------
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# Array used by highlighters to declare user overridable styles.
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typeset -gA ZSH_HIGHLIGHT_STYLES
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# Whether the command line buffer has been modified or not.
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#
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# Returns 0 if the buffer has changed since _zsh_highlight was last called.
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_zsh_highlight_buffer_modified()
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{
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[[ "${_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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# Add a highlight defined by ZSH_HIGHLIGHT_STYLES.
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#
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# Should be used by all highlighters aside from 'pattern' (cf. ZSH_HIGHLIGHT_PATTERN).
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# Overwritten in tests/test-highlighting.zsh when testing.
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_zsh_highlight_add_highlight()
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{
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local -i start end
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local highlight
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start=$1
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end=$2
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shift 2
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for highlight; do
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if (( $+ZSH_HIGHLIGHT_STYLES[$highlight] )); then
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region_highlight+=("$start $end $ZSH_HIGHLIGHT_STYLES[$highlight]")
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break
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fi
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done
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}
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# -------------------------------------------------------------------------------------------------
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# Setup functions
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# -------------------------------------------------------------------------------------------------
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# Helper for _zsh_highlight_bind_widgets
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# $1 is name of widget to call
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_zsh_highlight_call_widget()
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{
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builtin zle "$@" &&
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_zsh_highlight
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}
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# Rebind all ZLE widgets to make them invoke _zsh_highlights.
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_zsh_highlight_bind_widgets()
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{
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setopt localoptions noksharrays
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typeset -F SECONDS
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local prefix=orig-s$SECONDS-r$RANDOM # unique each time, in case we're sourced more than once
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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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print -r -- >&2 'zsh-syntax-highlighting: failed loading zsh/zleparameter.'
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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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local -U widgets_to_bind
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widgets_to_bind=(${${(k)widgets}:#(.*|run-help|which-command|beep|set-local-history|yank|yank-pop)})
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# Always wrap special zle-line-finish widget. This is needed to decide if the
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# current line ends and special highlighting logic needs to be applied.
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# E.g. remove cursor imprint, don't highlight partial paths, ...
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widgets_to_bind+=(zle-line-finish)
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# Always wrap special zle-isearch-update widget to be notified of updates in isearch.
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# This is needed because we need to disable highlighting in that case.
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widgets_to_bind+=(zle-isearch-update)
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local cur_widget
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for cur_widget in $widgets_to_bind; do
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case ${widgets[$cur_widget]:-""} in
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# Already rebound event: do nothing.
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user:_zsh_highlight_widget_*);;
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# The "eval"'s are required to make $cur_widget a closure: the value of the parameter at function
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# definition time is used.
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#
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# We can't use ${0/_zsh_highlight_widget_} because these widgets are always invoked with
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# NO_function_argzero, regardless of the option's setting here.
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# User defined widget: override and rebind old one with prefix "orig-".
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user:*) zle -N $prefix-$cur_widget ${widgets[$cur_widget]#*:}
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eval "_zsh_highlight_widget_${(q)prefix}-${(q)cur_widget}() { _zsh_highlight_call_widget ${(q)prefix}-${(q)cur_widget} -- \"\$@\" }"
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zle -N $cur_widget _zsh_highlight_widget_$prefix-$cur_widget;;
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# Completion widget: override and rebind old one with prefix "orig-".
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completion:*) zle -C $prefix-$cur_widget ${${(s.:.)widgets[$cur_widget]}[2,3]}
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eval "_zsh_highlight_widget_${(q)prefix}-${(q)cur_widget}() { _zsh_highlight_call_widget ${(q)prefix}-${(q)cur_widget} -- \"\$@\" }"
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zle -N $cur_widget _zsh_highlight_widget_$prefix-$cur_widget;;
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# Builtin widget: override and make it call the builtin ".widget".
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builtin) eval "_zsh_highlight_widget_${(q)prefix}-${(q)cur_widget}() { _zsh_highlight_call_widget .${(q)cur_widget} -- \"\$@\" }"
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zle -N $cur_widget _zsh_highlight_widget_$prefix-$cur_widget;;
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# Incomplete or nonexistent widget: Bind to z-sy-h directly.
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*)
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if [[ $cur_widget == zle-* ]] && (( ! ${+widgets[$cur_widget]} )); then
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_zsh_highlight_widget_${cur_widget}() { :; _zsh_highlight }
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zle -N $cur_widget _zsh_highlight_widget_$cur_widget
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else
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# Default: unhandled case.
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print -r -- >&2 "zsh-syntax-highlighting: unhandled ZLE widget ${(qq)cur_widget}"
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print -r -- >&2 "zsh-syntax-highlighting: (This is sometimes caused by doing \`bindkey <keys> ${(q-)cur_widget}\` without creating the ${(qq)cur_widget} widget with \`zle -N\` or \`zle -C\`.)"
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fi
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esac
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done
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}
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if (( $zsh_highlight_use_redrawhook )); then
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_zsh_highlight__zle-line-finish() {
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# Reset $WIDGET since the 'main' highlighter depends on it.
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#
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# A nested function is required to hide zle parameters; see
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# "User-defined widgets" in zshall.
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() {
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local -h +r WIDGET=zle-line-finish
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_zsh_highlight "$@"
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}
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}
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_zsh_highlight_bind_widgets(){}
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if [[ -o zle ]]; then
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add-zle-hook-widget zle-line-pre-redraw _zsh_highlight
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add-zle-hook-widget zle-line-finish _zsh_highlight__zle-line-finish
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fi
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fi
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# Load highlighters from directory.
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#
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# Arguments:
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# 1) Path to the highlighters directory.
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_zsh_highlight_load_highlighters()
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{
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setopt localoptions noksharrays bareglobqual
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# Check the directory exists.
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[[ -d "$1" ]] || {
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print -r -- >&2 "zsh-syntax-highlighting: highlighters directory ${(qq)1} not found."
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return 1
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}
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# Load highlighters from highlighters directory and check they define required functions.
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local highlighter highlighter_dir
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for highlighter_dir ($1/*/(/)); do
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highlighter="${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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if type "_zsh_highlight_highlighter_${highlighter}_paint" &> /dev/null &&
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type "_zsh_highlight_highlighter_${highlighter}_predicate" &> /dev/null;
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then
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# New (0.5.0) function names
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elif type "_zsh_highlight_${highlighter}_highlighter" &> /dev/null &&
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type "_zsh_highlight_${highlighter}_highlighter_predicate" &> /dev/null;
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then
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# Old (0.4.x) function names
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if false; then
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# TODO: only show this warning for plugin authors/maintainers, not for end users
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print -r -- >&2 "zsh-syntax-highlighting: warning: ${(qq)highlighter} highlighter uses deprecated entry point names; please ask its maintainer to update it: https://github.com/zsh-users/zsh-syntax-highlighting/issues/329"
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fi
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# Make it work.
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eval "_zsh_highlight_highlighter_${(q)highlighter}_paint() { _zsh_highlight_${(q)highlighter}_highlighter \"\$@\" }"
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eval "_zsh_highlight_highlighter_${(q)highlighter}_predicate() { _zsh_highlight_${(q)highlighter}_highlighter_predicate \"\$@\" }"
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else
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print -r -- >&2 "zsh-syntax-highlighting: ${(qq)highlighter} highlighter should define both required functions '_zsh_highlight_highlighter_${highlighter}_paint' and '_zsh_highlight_highlighter_${highlighter}_predicate' in ${(qq):-"$highlighter_dir${highlighter}-highlighter.zsh"}."
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fi
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done
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}
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# -------------------------------------------------------------------------------------------------
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# Setup
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# -------------------------------------------------------------------------------------------------
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# Try binding widgets.
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_zsh_highlight_bind_widgets || {
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print -r -- >&2 'zsh-syntax-highlighting: failed binding ZLE widgets, exiting.'
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return 1
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}
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# Resolve highlighters directory location.
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_zsh_highlight_load_highlighters "${ZSH_HIGHLIGHT_HIGHLIGHTERS_DIR:-${${0:A}:h}/highlighters}" || {
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print -r -- >&2 'zsh-syntax-highlighting: failed loading highlighters, exiting.'
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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 -Uz add-zsh-hook
|
|
add-zsh-hook preexec _zsh_highlight_preexec_hook 2>/dev/null || {
|
|
print -r -- >&2 'zsh-syntax-highlighting: failed loading add-zsh-hook.'
|
|
}
|
|
|
|
# Load zsh/parameter module if available
|
|
zmodload zsh/parameter 2>/dev/null || true
|
|
|
|
# Initialize the array of active highlighters if needed.
|
|
[[ $#ZSH_HIGHLIGHT_HIGHLIGHTERS -eq 0 ]] && ZSH_HIGHLIGHT_HIGHLIGHTERS=(main)
|
|
|
|
# Restore the aliases we unned
|
|
eval "$zsh_highlight__aliases"
|
|
builtin unset zsh_highlight__aliases
|
|
|
|
# Set $?.
|
|
true
|