139 lines
5.5 KiB
Bash
139 lines
5.5 KiB
Bash
# -------------------------------------------------------------------------------------------------
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# Copyright (c) 2010-2017 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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# Define default styles.
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: ${ZSH_HIGHLIGHT_STYLES[bracket-error]:=fg=red,bold}
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: ${ZSH_HIGHLIGHT_STYLES[bracket-level-1]:=fg=blue,bold}
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: ${ZSH_HIGHLIGHT_STYLES[bracket-level-2]:=fg=green,bold}
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: ${ZSH_HIGHLIGHT_STYLES[bracket-level-3]:=fg=magenta,bold}
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: ${ZSH_HIGHLIGHT_STYLES[bracket-level-4]:=fg=yellow,bold}
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: ${ZSH_HIGHLIGHT_STYLES[bracket-level-5]:=fg=cyan,bold}
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: ${ZSH_HIGHLIGHT_STYLES[cursor-matchingbracket]:=standout}
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: ${ZSH_HIGHLIGHT_STYLES[cursor-containing-brackets]:=}
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# Whether the brackets highlighter should be called or not.
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_zsh_highlight_highlighter_brackets_predicate()
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{
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[[ $WIDGET == zle-line-finish ]] || _zsh_highlight_cursor_moved || _zsh_highlight_buffer_modified
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}
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# Brackets highlighting function.
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_zsh_highlight_highlighter_brackets_paint()
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{
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local char style
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local -i bracket_color_size=${#ZSH_HIGHLIGHT_STYLES[(I)bracket-level-*]} buflen=${#BUFFER} escaped_state level=0 matchingpos pos
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local -A containing levelpos lastoflevel matching
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# Find all brackets and remember which one is matching
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pos=0
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escaped_state=0
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for char in ${(s..)BUFFER} ; do
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(( ++pos ))
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if [[ $char = "\\" ]]; then
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(( escaped_state = !escaped_state ))
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containing[$pos]=$containing[$(( pos - 1 ))]
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continue
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fi
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case $char in
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["([{"])
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if (( escaped_state )); then
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containing[$pos]=$containing[$(( pos - 1 ))]
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else
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levelpos[$pos]=$((++level))
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lastoflevel[$level]=$pos
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containing[$pos]=$pos
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fi
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;;
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[")]}"])
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if (( escaped_state )); then
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containing[$pos]=$containing[$(( pos - 1 ))]
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elif (( level > 0 )); then
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matchingpos=$lastoflevel[$level]
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levelpos[$pos]=$((level--))
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if _zsh_highlight_brackets_match $matchingpos $pos; then
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matching[$matchingpos]=$pos
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matching[$pos]=$matchingpos
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containing[$pos]=containing[$(( matchingpos - 1))]
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fi
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else
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levelpos[$pos]=-1
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containing[$pos]=$containing[$(( pos - 1 ))]
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fi
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;;
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*)
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containing[$pos]=$containing[$(( pos - 1 ))]
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esac
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escaped_state=0
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done
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# Now highlight all found brackets
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for pos in ${(k)levelpos}; do
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if (( $+matching[$pos] )); then
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if (( bracket_color_size )); then
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_zsh_highlight_add_highlight $((pos - 1)) $pos bracket-level-$(( (levelpos[$pos] - 1) % bracket_color_size + 1 ))
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fi
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else
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_zsh_highlight_add_highlight $((pos - 1)) $pos bracket-error
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fi
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done
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if [[ $WIDGET != zle-line-finish ]]; then
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# If cursor is on a bracket, then highlight corresponding bracket, if any.
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pos=$((CURSOR + 1))
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if (( $+levelpos[$pos] )) && (( $+matching[$pos] )); then
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local -i otherpos=$matching[$pos]
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_zsh_highlight_add_highlight $((otherpos - 1)) $otherpos cursor-matchingbracket
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fi
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if [[ -n $ZSH_HIGHLIGHT_STYLES[cursor-containing-brackets] ]]; then
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# If cursor is inside a balanced pair, highlight the pair
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pos=$CURSOR
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if (( containing[$pos] > 0 )); then
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local -i opener=$containing[$pos]
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local -i closer=$matching[$opener]
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if (( closer )); then
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_zsh_highlight_add_highlight $((opener - 1)) $opener cursor-containing-brackets
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_zsh_highlight_add_highlight $((closer - 1)) $closer cursor-containing-brackets
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fi
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fi
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fi
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fi
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}
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# Helper function to differentiate type
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_zsh_highlight_brackets_match()
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{
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case $BUFFER[$1] in
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\() [[ $BUFFER[$2] == \) ]];;
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\[) [[ $BUFFER[$2] == \] ]];;
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\{) [[ $BUFFER[$2] == \} ]];;
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*) false;;
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esac
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}
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