zsh-syntax-highlighting/zsh-syntax-highlighting.zsh

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#!/usr/bin/env zsh
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# -*- mode: zsh; sh-indentation: 2; indent-tabs-mode: nil; sh-basic-offset: 2; -*-
# vim: ft=zsh sw=2 ts=2 et
# Copyleft 2011 zsh-syntax-highlighting contributors
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# http://github.com/nicoulaj/zsh-syntax-highlighting
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# All wrongs reserved.
# Token types styles.
typeset -gA ZSH_HIGHLIGHT_STYLES
ZSH_HIGHLIGHT_STYLES=(
default 'none'
isearch 'fg=magenta,standout'
special 'fg=magenta,standout'
unknown-token 'fg=red,bold'
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reserved-word 'fg=yellow'
alias 'fg=green'
builtin 'fg=green'
function 'fg=green'
command 'fg=green'
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hashed-command 'fg=green'
path 'underline'
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globbing 'fg=blue'
history-expansion 'fg=blue'
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single-hyphen-option 'none'
double-hyphen-option 'none'
back-quoted-argument 'none'
single-quoted-argument 'fg=yellow'
double-quoted-argument 'fg=yellow'
dollar-double-quoted-argument 'fg=cyan'
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back-double-quoted-argument 'fg=cyan'
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bracket-error 'fg=red,bold'
)
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# Colors for bracket levels.
# Put as many color as you wish.
# Leave it as an empty array to disable.
ZSH_HIGHLIGHT_MATCHING_BRACKETS_STYLES=(
'fg=blue,bold'
'fg=green,bold'
'fg=magenta,bold'
'fg=yellow,bold'
'fg=cyan,bold'
)
# Tokens that are always followed by a command.
ZSH_HIGHLIGHT_TOKENS_FOLLOWED_BY_COMMANDS=(
'|'
'||'
';'
'&'
'&&'
'sudo'
'start'
'time'
'strace'
'noglob'
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'nocorrect'
'command'
'builtin'
'whence'
'which'
'where'
'whereis'
)
# ZLE highlight types.
zle_highlight=(
special:$ZSH_HIGHLIGHT_STYLES[special]
isearch:$ZSH_HIGHLIGHT_STYLES[isearch]
)
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# Check if the argument is a path.
_zsh_check-path() {
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[[ -z $arg ]] && return 1
[[ -e $arg ]] && return 0
[[ ! -e ${arg:h} ]] && return 1
[[ ${#BUFFER} == $end_pos && -n $(print $arg*(N)) ]] && return 0
return 1
}
# Highlight special chars inside double-quoted strings
_zsh_highlight-string() {
setopt localoptions noksharrays
local i j k style
# Starting quote is at 1, so start parsing at offset 2 in the string.
for (( i = 2 ; i < end_pos - start_pos ; i += 1 )) ; do
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(( j = i + start_pos - 1 ))
(( k = j + 1 ))
case "$arg[$i]" in
'$') style=$ZSH_HIGHLIGHT_STYLES[dollar-double-quoted-argument];;
"\\") style=$ZSH_HIGHLIGHT_STYLES[back-double-quoted-argument]
(( k += 1 )) # Color following char too.
(( i += 1 )) # Skip parsing the escaped char.
;;
*) continue;;
esac
region_highlight+=("$j $k $style")
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done
}
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# Recolorize the current ZLE buffer.
_zsh_highlight-zle-buffer() {
# Avoid doing the same work over and over
[[ ${ZSH_PRIOR_HIGHLIGHTED_BUFFER:-} == $BUFFER ]] && [[ ${#region_highlight} -gt 0 ]] && (( ZSH_PRIOR_CURSOR == CURSOR )) && return
ZSH_PRIOR_HIGHLIGHTED_BUFFER=$BUFFER
ZSH_PRIOR_CURSOR=$CURSOR
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setopt localoptions extendedglob bareglobqual
local new_expression=true
local start_pos=0
local highlight_glob=true
local end_pos arg style
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region_highlight=()
for arg in ${(z)BUFFER}; do
local substr_color=0
[[ $start_pos -eq 0 && $arg = 'noglob' ]] && highlight_glob=false
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((start_pos+=${#BUFFER[$start_pos+1,-1]}-${#${BUFFER[$start_pos+1,-1]##[[:space:]]#}}))
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((end_pos=$start_pos+${#arg}))
if $new_expression; then
new_expression=false
res=$(LC_ALL=C builtin type -w $arg 2>/dev/null)
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case $res in
*': reserved') style=$ZSH_HIGHLIGHT_STYLES[reserved-word];;
*': alias') style=$ZSH_HIGHLIGHT_STYLES[alias]
local aliased_command="${"$(alias $arg)"#*=}"
if [[ ${${ZSH_HIGHLIGHT_TOKENS_FOLLOWED_BY_COMMANDS[(r)$aliased_command]:-}:+yes} = 'yes' && ${${ZSH_HIGHLIGHT_TOKENS_FOLLOWED_BY_COMMANDS[(r)$arg]:-}:+yes} != 'yes' ]]; then
ZSH_HIGHLIGHT_TOKENS_FOLLOWED_BY_COMMANDS+=($arg)
fi
;;
*': builtin') style=$ZSH_HIGHLIGHT_STYLES[builtin];;
*': function') style=$ZSH_HIGHLIGHT_STYLES[function];;
*': command') style=$ZSH_HIGHLIGHT_STYLES[command];;
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*': hashed') style=$ZSH_HIGHLIGHT_STYLES[hashed-command];;
*) if _zsh_check-path; then
style=$ZSH_HIGHLIGHT_STYLES[path]
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elif [[ $arg[0,1] = $histchars[0,1] ]]; then
style=$ZSH_HIGHLIGHT_STYLES[history-expansion]
else
style=$ZSH_HIGHLIGHT_STYLES[unknown-token]
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fi
;;
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esac
else
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case $arg in
'--'*) style=$ZSH_HIGHLIGHT_STYLES[double-hyphen-option];;
'-'*) style=$ZSH_HIGHLIGHT_STYLES[single-hyphen-option];;
"'"*"'") style=$ZSH_HIGHLIGHT_STYLES[single-quoted-argument];;
'"'*'"') style=$ZSH_HIGHLIGHT_STYLES[double-quoted-argument]
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region_highlight+=("$start_pos $end_pos $style")
_zsh_highlight-string
substr_color=1
;;
'`'*'`') style=$ZSH_HIGHLIGHT_STYLES[back-quoted-argument];;
*"*"*) $highlight_glob && style=$ZSH_HIGHLIGHT_STYLES[globbing] || style=$ZSH_HIGHLIGHT_STYLES[default];;
*) if _zsh_check-path; then
style=$ZSH_HIGHLIGHT_STYLES[path]
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elif [[ $arg[0,1] = $histchars[0,1] ]]; then
style=$ZSH_HIGHLIGHT_STYLES[history-expansion]
else
style=$ZSH_HIGHLIGHT_STYLES[default]
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fi
;;
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esac
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fi
[[ $substr_color = 0 ]] && region_highlight+=("$start_pos $end_pos $style")
[[ ${${ZSH_HIGHLIGHT_TOKENS_FOLLOWED_BY_COMMANDS[(r)${arg//|/\|}]:-}:+yes} = 'yes' ]] && new_expression=true
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start_pos=$end_pos
done
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# Bracket matching
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bracket_color_size=${#ZSH_HIGHLIGHT_MATCHING_BRACKETS_STYLES}
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if ((bracket_color_size > 0)); then
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typeset -A levelpos lastoflevel matching revmatching
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((level = 0))
for pos in {1..${#BUFFER}}; do
case $BUFFER[pos] in
"("|"["|"{")
levelpos[$pos]=$((++level))
lastoflevel[$level]=$pos
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;;
")"|"]"|"}")
matching[$lastoflevel[$level]]=$pos
revmatching[$pos]=$lastoflevel[$level]
levelpos[$pos]=$((level--))
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;;
esac
done
for pos in ${(k)levelpos}; do
level=$levelpos[$pos]
if ((level < 1)); then
region_highlight+=("$((pos - 1)) $pos "$ZSH_HIGHLIGHT_STYLES[bracket-error])
else
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region_highlight+=("$((pos - 1)) $pos "$ZSH_HIGHLIGHT_MATCHING_BRACKETS_STYLES[(( (level - 1) % bracket_color_size + 1 ))])
fi
done
((c = CURSOR + 1))
if [[ -n $levelpos[$c] ]]; then
((otherpos = -1))
[[ -n $matching[$c] ]] && otherpos=$matching[$c]
[[ -n $revmatching[$c] ]] && otherpos=$revmatching[$c]
region_highlight+=("$((otherpos - 1)) $otherpos standout")
fi
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fi
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}
# Special treatment for completion/expansion events:
# For each *complete* function (except 'accept-and-menu-complete'),
# we create a widget which mimics the original
# and use this orig-* version inside the new colorized zle function (the dot
# idiom used for all others doesn't work right for these functions for some
# reason). You can see the default setup using "zle -l -L".
# Bind all ZLE events from zle -la to highlighting function.
local clean_event
for event in $(zle -la); do
case $event in
_*)
;;
accept-and-menu-complete)
eval "$event() { builtin zle .$event && _zsh_highlight-zle-buffer } ; zle -N $event"
;;
[^\.]*complete*)
eval "zle -C orig-$event .$event _main_complete ; $event() { builtin zle orig-$event && _zsh_highlight-zle-buffer } ; zle -N $event"
;;
.*)
clean_event=$event[2,${#event}] # Remove the leading dot in the event name
eval "$clean_event() { builtin zle $event && _zsh_highlight-zle-buffer } ; zle -N $clean_event"
;;
*)
;;
esac
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done