mirror of
https://github.com/zsh-users/zsh-syntax-highlighting.git
synced 2024-09-19 05:41:15 +02:00
ff4d402e9a
Given the following input:
PREBUFFER=$'echo "foo\n'
BUFFER='bar"'
This patch causes the '"foo' part to be highlighted as a string. There
is no test because the tests only check highlighting of BUFFER, and 'bar"'
is already highlighted correctly.
277 lines
12 KiB
Bash
Executable file
277 lines
12 KiB
Bash
Executable file
#!/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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# Define default styles.
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: ${ZSH_HIGHLIGHT_STYLES[default]:=none}
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: ${ZSH_HIGHLIGHT_STYLES[unknown-token]:=fg=red,bold}
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: ${ZSH_HIGHLIGHT_STYLES[reserved-word]:=fg=yellow}
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: ${ZSH_HIGHLIGHT_STYLES[alias]:=fg=green}
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: ${ZSH_HIGHLIGHT_STYLES[builtin]:=fg=green}
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: ${ZSH_HIGHLIGHT_STYLES[function]:=fg=green}
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: ${ZSH_HIGHLIGHT_STYLES[command]:=fg=green}
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: ${ZSH_HIGHLIGHT_STYLES[precommand]:=fg=green,underline}
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: ${ZSH_HIGHLIGHT_STYLES[commandseparator]:=none}
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: ${ZSH_HIGHLIGHT_STYLES[hashed-command]:=fg=green}
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: ${ZSH_HIGHLIGHT_STYLES[path]:=underline}
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: ${ZSH_HIGHLIGHT_STYLES[path_prefix]:=underline}
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: ${ZSH_HIGHLIGHT_STYLES[path_approx]:=fg=yellow,underline}
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: ${ZSH_HIGHLIGHT_STYLES[globbing]:=fg=blue}
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: ${ZSH_HIGHLIGHT_STYLES[history-expansion]:=fg=blue}
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: ${ZSH_HIGHLIGHT_STYLES[single-hyphen-option]:=none}
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: ${ZSH_HIGHLIGHT_STYLES[double-hyphen-option]:=none}
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: ${ZSH_HIGHLIGHT_STYLES[back-quoted-argument]:=none}
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: ${ZSH_HIGHLIGHT_STYLES[single-quoted-argument]:=fg=yellow}
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: ${ZSH_HIGHLIGHT_STYLES[double-quoted-argument]:=fg=yellow}
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: ${ZSH_HIGHLIGHT_STYLES[dollar-double-quoted-argument]:=fg=cyan}
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: ${ZSH_HIGHLIGHT_STYLES[back-double-quoted-argument]:=fg=cyan}
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: ${ZSH_HIGHLIGHT_STYLES[assign]:=none}
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# Whether the highlighter should be called or not.
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_zsh_highlight_main_highlighter_predicate()
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{
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_zsh_highlight_buffer_modified
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}
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# Helper to deal with tokens crossing line boundaries.
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_zsh_highlight_main_add_region_highlight() {
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integer start=$1 end=$2
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local style=$3
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# The calculation was relative to $PREBUFFER$BUFFER, but region_highlight is
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# relative to $BUFFER.
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(( start -= $#PREBUFFER ))
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(( end -= $#PREBUFFER ))
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(( end < 0 )) && return # bug
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(( start < 0 )) && start=0 # normal with e.g. multiline strings
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region_highlight+=("$start $end $style")
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}
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# Main syntax highlighting function.
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_zsh_highlight_main_highlighter()
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{
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emulate -L zsh
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setopt localoptions extendedglob bareglobqual
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local start_pos=0 end_pos highlight_glob=true new_expression=true arg style sudo=false sudo_arg=false
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typeset -a ZSH_HIGHLIGHT_TOKENS_COMMANDSEPARATOR
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typeset -a ZSH_HIGHLIGHT_TOKENS_PRECOMMANDS
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typeset -a ZSH_HIGHLIGHT_TOKENS_FOLLOWED_BY_COMMANDS
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local buf="$PREBUFFER$BUFFER"
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region_highlight=()
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ZSH_HIGHLIGHT_TOKENS_COMMANDSEPARATOR=(
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'|' '||' ';' '&' '&&'
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)
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ZSH_HIGHLIGHT_TOKENS_PRECOMMANDS=(
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'builtin' 'command' 'exec' 'nocorrect' 'noglob'
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)
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# Tokens that are always immediately followed by a command.
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ZSH_HIGHLIGHT_TOKENS_FOLLOWED_BY_COMMANDS=(
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$ZSH_HIGHLIGHT_TOKENS_COMMANDSEPARATOR $ZSH_HIGHLIGHT_TOKENS_PRECOMMANDS
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)
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for arg in ${(z)buf}; do
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local substr_color=0
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local style_override=""
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[[ $start_pos -eq 0 && $arg = 'noglob' ]] && highlight_glob=false
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((start_pos+=${#buf[$start_pos+1,-1]}-${#${buf[$start_pos+1,-1]##([[:space:]]|\\[[:space:]])#}}))
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((end_pos=$start_pos+${#arg}))
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# Deal with faked colons.
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#
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# We can't use the (Z+n+) flag because that elides the end-of-command
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# token altogether, so 'echo foo\necho bar' (two commands) becomes
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# indistinguishable from 'echo foo echo bar' (one command with three
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# words for arguments).
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if [[ $arg == ';' ]] ; then
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if [[ $buf[start_pos+1] == ';' ]] ; then
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# Literally-input colon. That's the normal case.
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elif [[ $buf[start_pos] == $'\n' ]] ; then
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# Newline token rendered as a colon. Empirically we're off-by-one.
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(( start_pos -= 1 ))
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(( end_pos -= 1 ))
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else
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# Currently, there aren't any other sources of ";" (SEPER) tokens
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# besides literally-input semicolons and (Z+n+)-converted newlines,
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# If that ever changes, handle them here.
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fi
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fi
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# Parse the sudo command line
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if $sudo; then
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case "$arg" in
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# Flag that requires an argument
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'-'[Cgprtu]) sudo_arg=true;;
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# This prevents misbehavior with sudo -u -otherargument
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'-'*) sudo_arg=false;;
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*) if $sudo_arg; then
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sudo_arg=false
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else
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sudo=false
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new_expression=true
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fi
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;;
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esac
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fi
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if $new_expression; then
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new_expression=false
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if [[ -n ${(M)ZSH_HIGHLIGHT_TOKENS_PRECOMMANDS:#"$arg"} ]]; then
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style=$ZSH_HIGHLIGHT_STYLES[precommand]
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elif [[ "$arg" = "sudo" ]]; then
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style=$ZSH_HIGHLIGHT_STYLES[precommand]
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sudo=true
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else
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res=$(LC_ALL=C builtin type -w $arg 2>/dev/null)
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case $res in
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*': reserved') style=$ZSH_HIGHLIGHT_STYLES[reserved-word];;
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*': alias') style=$ZSH_HIGHLIGHT_STYLES[alias]
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local aliased_command="${"$(alias -- $arg)"#*=}"
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[[ -n ${(M)ZSH_HIGHLIGHT_TOKENS_FOLLOWED_BY_COMMANDS:#"$aliased_command"} && -z ${(M)ZSH_HIGHLIGHT_TOKENS_FOLLOWED_BY_COMMANDS:#"$arg"} ]] && ZSH_HIGHLIGHT_TOKENS_FOLLOWED_BY_COMMANDS+=($arg)
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;;
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*': builtin') style=$ZSH_HIGHLIGHT_STYLES[builtin];;
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*': function') style=$ZSH_HIGHLIGHT_STYLES[function];;
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*': command') style=$ZSH_HIGHLIGHT_STYLES[command];;
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*': hashed') style=$ZSH_HIGHLIGHT_STYLES[hashed-command];;
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*) if _zsh_highlight_main_highlighter_check_assign; then
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style=$ZSH_HIGHLIGHT_STYLES[assign]
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new_expression=true
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elif _zsh_highlight_main_highlighter_check_path; then
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style=$ZSH_HIGHLIGHT_STYLES[path]
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elif [[ $arg[0,1] == $histchars[0,1] || $arg[0,1] == $histchars[2,2] ]]; then
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style=$ZSH_HIGHLIGHT_STYLES[history-expansion]
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else
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style=$ZSH_HIGHLIGHT_STYLES[unknown-token]
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fi
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;;
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esac
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fi
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else
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case $arg in
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'--'*) style=$ZSH_HIGHLIGHT_STYLES[double-hyphen-option];;
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'-'*) style=$ZSH_HIGHLIGHT_STYLES[single-hyphen-option];;
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"'"*) style=$ZSH_HIGHLIGHT_STYLES[single-quoted-argument];;
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'"'*) style=$ZSH_HIGHLIGHT_STYLES[double-quoted-argument]
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_zsh_highlight_main_add_region_highlight $start_pos $end_pos $style
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_zsh_highlight_main_highlighter_highlight_string
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substr_color=1
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;;
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'`'*) style=$ZSH_HIGHLIGHT_STYLES[back-quoted-argument];;
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*"*"*) $highlight_glob && style=$ZSH_HIGHLIGHT_STYLES[globbing] || style=$ZSH_HIGHLIGHT_STYLES[default];;
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*) if _zsh_highlight_main_highlighter_check_path; then
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style=$ZSH_HIGHLIGHT_STYLES[path]
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elif [[ $arg[0,1] = $histchars[0,1] ]]; then
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style=$ZSH_HIGHLIGHT_STYLES[history-expansion]
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elif [[ -n ${(M)ZSH_HIGHLIGHT_TOKENS_COMMANDSEPARATOR:#"$arg"} ]]; then
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style=$ZSH_HIGHLIGHT_STYLES[commandseparator]
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else
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style=$ZSH_HIGHLIGHT_STYLES[default]
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fi
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;;
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esac
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fi
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# if a style_override was set (eg in _zsh_highlight_main_highlighter_check_path), use it
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[[ -n $style_override ]] && style=$ZSH_HIGHLIGHT_STYLES[$style_override]
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[[ $substr_color = 0 ]] && _zsh_highlight_main_add_region_highlight $start_pos $end_pos $style
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[[ -n ${(M)ZSH_HIGHLIGHT_TOKENS_FOLLOWED_BY_COMMANDS:#"$arg"} ]] && new_expression=true
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start_pos=$end_pos
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done
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}
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# Check if the argument is variable assignment
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_zsh_highlight_main_highlighter_check_assign()
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{
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setopt localoptions extended_glob
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[[ $arg == [[:alpha:]_][[:alnum:]_]#(|\[*\])=* ]]
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}
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# Check if the argument is a path.
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_zsh_highlight_main_highlighter_check_path()
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{
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setopt localoptions nonomatch
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local expanded_path; : ${expanded_path:=${(Q)~arg}}
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[[ -z $expanded_path ]] && return 1
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[[ -e $expanded_path ]] && return 0
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# Search the path in CDPATH
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local cdpath_dir
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for cdpath_dir in $cdpath ; do
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[[ -e "$cdpath_dir/$expanded_path" ]] && return 0
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done
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[[ ! -e ${expanded_path:h} ]] && return 1
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if [[ ${BUFFER[1]} != "-" && ${#BUFFER} == $end_pos ]]; then
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local -a tmp
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# got a path prefix?
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tmp=( ${expanded_path}*(N) )
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(( $#tmp > 0 )) && style_override=path_prefix && return 0
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# or maybe an approximate path?
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tmp=( (#a1)${expanded_path}*(N) )
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(( $#tmp > 0 )) && style_override=path_approx && return 0
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fi
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return 1
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}
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# Highlight special chars inside double-quoted strings
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_zsh_highlight_main_highlighter_highlight_string()
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{
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setopt localoptions noksharrays
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local i j k style varflag
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# Starting quote is at 1, so start parsing at offset 2 in the string.
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for (( i = 2 ; i < end_pos - start_pos ; i += 1 )) ; do
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(( j = i + start_pos - 1 ))
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(( k = j + 1 ))
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case "$arg[$i]" in
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'$' ) style=$ZSH_HIGHLIGHT_STYLES[dollar-double-quoted-argument]
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(( varflag = 1))
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;;
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"\\") style=$ZSH_HIGHLIGHT_STYLES[back-double-quoted-argument]
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for (( c = i + 1 ; c < end_pos - start_pos ; c += 1 )); do
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[[ "$arg[$c]" != ([0-9,xX,a-f,A-F]) ]] && break
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done
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AA=$arg[$i+1,$c-1]
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# Matching for HEX and OCT values like \0xA6, \xA6 or \012
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if [[ "$AA" =~ "^(0*(x|X)[0-9,a-f,A-F]{1,2})" || "$AA" =~ "^(0[0-7]{1,3})" ]];then
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(( k += $#MATCH ))
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(( i += $#MATCH ))
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else
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(( k += 1 )) # Color following char too.
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(( i += 1 )) # Skip parsing the escaped char.
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fi
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(( varflag = 0 )) # End of variable
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;;
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([^a-zA-Z0-9_]))
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(( varflag = 0 )) # End of variable
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continue
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;;
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*) [[ $varflag -eq 0 ]] && continue ;;
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esac
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_zsh_highlight_main_add_region_highlight $j $k $style
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done
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}
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