mirror of
https://github.com/zsh-users/zsh-syntax-highlighting.git
synced 2024-09-19 05:41:15 +02:00
362 lines
16 KiB
Bash
Executable file
362 lines
16 KiB
Bash
Executable file
#!/usr/bin/env zsh
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# -------------------------------------------------------------------------------------------------
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# Copyright (c) 2010-2015 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[suffix-alias]:=fg=green,underline}
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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-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[back-dollar-quoted-argument]:=fg=cyan}
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: ${ZSH_HIGHLIGHT_STYLES[assign]:=none}
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: ${ZSH_HIGHLIGHT_STYLES[redirection]:=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 -= $#PREBUFFER ))
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(( end < 0 )) && return # having end<0 would be a bug
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(( start < 0 )) && start=0 # having start<0 is normal with e.g. multiline strings
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region_highlight+=("$start $end $style")
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}
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# Main syntax highlighting function.
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_zsh_highlight_main_highlighter()
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{
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emulate -L zsh
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setopt localoptions extendedglob bareglobqual
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local start_pos=0 end_pos highlight_glob=true new_expression=true arg style sudo=false sudo_arg=false
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local redirection=false # true when we've seen a redirection operator before seeing the command word
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typeset -a ZSH_HIGHLIGHT_TOKENS_COMMANDSEPARATOR
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typeset -a ZSH_HIGHLIGHT_TOKENS_PRECOMMANDS
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typeset -a ZSH_HIGHLIGHT_TOKENS_FOLLOWED_BY_COMMANDS
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local buf="$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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# substr_color is set to 1 to disable adding an entry to region_highlight
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# for this iteration. Currently, that is done for "" and $'' strings,
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# which add the entry early so escape sequences within the string override
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# the string's color.
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integer substr_color=0
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local style_override=""
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if $new_expression && [[ $arg = 'noglob' ]]; then
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highlight_glob=false
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fi
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# advance $start_pos, skipping over whitespace in $buf.
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if [[ $arg == ';' ]] ; then
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# We're looking for either a semicolon or a newline, whichever comes
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# first. Both of these are rendered as a ";" (SEPER) by the ${(z)..}
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# flag.
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#
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# We can't use the (Z+n+) flag because that elides the end-of-command
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# token altogether, so 'echo foo\necho bar' (two commands) becomes
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# indistinguishable from 'echo foo echo bar' (one command with three
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# words for arguments).
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local needle=$'[;\n]'
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integer offset=${${buf[start_pos+1,-1]}[(i)$needle]}
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(( start_pos += offset - 1 ))
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(( end_pos = start_pos + $#arg ))
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else
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((start_pos+=${#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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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; highlight_glob=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 && ! $redirection; then # $arg is the command word
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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=$ZSH_HIGHLIGHT_STYLES[precommand]
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sudo=true
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else
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local res="$(LC_ALL=C builtin type -w ${(Q)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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*': suffix alias')
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style=$ZSH_HIGHLIGHT_STYLES[suffix-alias]
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;;
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*': alias') style=$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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if [[ $arg[-1] != '(' ]]; then
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# assignment to a scalar parameter.
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# (For array assignments, the command doesn't start until the ")" token.)
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new_expression=true; highlight_glob=true
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fi
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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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elif [[ $arg[1] == '<' || $arg[1] == '>' ]]; then
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style=$ZSH_HIGHLIGHT_STYLES[redirection]
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redirection=true
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elif [[ $arg[1,2] == '((' ]]; then
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# Arithmetic evaluation.
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#
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# Note: prior to zsh-5.1.1-52-g4bed2cf (workers/36669), the ${(z)...}
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# splitter would only output the '((' token if the matching '))' had
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# been typed. Therefore, under those versions of zsh, BUFFER="(( 42"
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# would be highlighted as an error until the matching "))" are typed.
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#
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# We highlight just the opening parentheses, as a reserved word; this
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# is how [[ ... ]] is highlighted, too.
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style=$ZSH_HIGHLIGHT_STYLES[reserved-word]
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_zsh_highlight_main_add_region_highlight $start_pos $((start_pos + 2)) $style
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substr_color=1
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else
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if _zsh_highlight_main_highlighter_check_path; then
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style=$ZSH_HIGHLIGHT_STYLES[path]
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else
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style=$ZSH_HIGHLIGHT_STYLES[unknown-token]
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fi
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fi
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;;
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esac
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fi
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else # $arg is the file target of a prefix redirection, or a non-command word
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if $redirection; then
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redirection=false
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new_expression=true; highlight_glob=true
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fi
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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[dollar-quoted-argument]
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_zsh_highlight_main_add_region_highlight $start_pos $end_pos $style
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_zsh_highlight_main_highlighter_highlight_dollar_string
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substr_color=1
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;;
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'`'*) style=$ZSH_HIGHLIGHT_STYLES[back-quoted-argument];;
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[*?]*|*[^\\][*?]*)
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$highlight_glob && style=$ZSH_HIGHLIGHT_STYLES[globbing] || style=$ZSH_HIGHLIGHT_STYLES[default];;
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*) if false; then
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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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elif [[ $arg[1] == '<' || $arg[1] == '>' ]]; then
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style=$ZSH_HIGHLIGHT_STYLES[redirection]
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else
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if _zsh_highlight_main_highlighter_check_path; then
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style=$ZSH_HIGHLIGHT_STYLES[path]
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else
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style=$ZSH_HIGHLIGHT_STYLES[default]
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fi
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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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[[ -n ${(M)ZSH_HIGHLIGHT_TOKENS_COMMANDSEPARATOR:#"$arg"} ]] && highlight_glob=true
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start_pos=$end_pos
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done
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}
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# Check if $arg 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 $arg 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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(( $#tmp > 0 )) && style_override=path_approx && return 0
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fi
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return 1
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}
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# Highlight special chars inside double-quoted strings
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_zsh_highlight_main_highlighter_highlight_string()
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{
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setopt localoptions noksharrays
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local i j k style
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# Starting quote is at 1, so start parsing at offset 2 in the string.
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for (( i = 2 ; i < end_pos - start_pos ; i += 1 )) ; do
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(( j = i + start_pos - 1 ))
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(( k = j + 1 ))
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case "$arg[$i]" in
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'$' ) style=$ZSH_HIGHLIGHT_STYLES[dollar-double-quoted-argument]
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# Look for an alphanumeric parameter name.
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if [[ ${arg:$i} =~ ^([A-Za-z_][A-Za-z0-9_]*|[0-9]+) ]] ; then
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(( k += $#MATCH )) # highlight the parameter name
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(( i += $#MATCH )) # skip past it
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else
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continue
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fi
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;;
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"\\") style=$ZSH_HIGHLIGHT_STYLES[back-double-quoted-argument]
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if [[ \\\`\"\$ == *$arg[$i+1]* ]]; then
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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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else
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continue
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fi
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;;
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*) continue ;;
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esac
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_zsh_highlight_main_add_region_highlight $j $k $style
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done
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}
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# Highlight special chars inside dollar-quoted strings
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_zsh_highlight_main_highlighter_highlight_dollar_string()
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{
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setopt localoptions noksharrays
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local i j k style
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local AA
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integer c
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# Starting dollar-quote is at 1:2, so start parsing at offset 3 in the string.
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for (( i = 3 ; i < end_pos - start_pos ; i += 1 )) ; do
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(( j = i + start_pos - 1 ))
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(( k = j + 1 ))
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case "$arg[$i]" in
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"\\") style=$ZSH_HIGHLIGHT_STYLES[back-dollar-quoted-argument]
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for (( c = i + 1 ; c <= end_pos - start_pos ; c += 1 )); do
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[[ "$arg[$c]" != ([0-9xXuUa-fA-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" =~ "^(x|X)[0-9a-fA-F]{1,2}"
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|| "$AA" =~ "^[0-7]{1,3}"
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|| "$AA" =~ "^u[0-9a-fA-F]{1,4}"
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|| "$AA" =~ "^U[0-9a-fA-F]{1,8}"
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]]; then
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(( k += $#MATCH ))
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(( i += $#MATCH ))
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else
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if (( $#arg > $i+1 )) && [[ $arg[$i+1] == [xXuU] ]]; then
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# \x not followed by hex digits is probably an error
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style=$ZSH_HIGHLIGHT_STYLES[unknown-token]
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fi
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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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;;
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*) 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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