zsh-syntax-highlighting/highlighters/main/main-highlighter.zsh
2015-01-17 17:12:25 +01:00

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#!/usr/bin/env zsh
# -------------------------------------------------------------------------------------------------
# Copyright (c) 2010-2011 zsh-syntax-highlighting contributors
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without modification, are permitted
# provided that the following conditions are met:
#
# * Redistributions of source code must retain the above copyright notice, this list of conditions
# and the following disclaimer.
# * Redistributions in binary form must reproduce the above copyright notice, this list of
# conditions and the following disclaimer in the documentation and/or other materials provided
# with the distribution.
# * Neither the name of the zsh-syntax-highlighting contributors nor the names of its contributors
# may be used to endorse or promote products derived from this software without specific prior
# written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
# FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
# IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
# OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
# -------------------------------------------------------------------------------------------------
# -*- mode: zsh; sh-indentation: 2; indent-tabs-mode: nil; sh-basic-offset: 2; -*-
# vim: ft=zsh sw=2 ts=2 et
# -------------------------------------------------------------------------------------------------
# Define default styles.
: ${ZSH_HIGHLIGHT_STYLES[default]:=none}
: ${ZSH_HIGHLIGHT_STYLES[unknown-token]:=fg=red,bold}
: ${ZSH_HIGHLIGHT_STYLES[reserved-word]:=fg=yellow}
: ${ZSH_HIGHLIGHT_STYLES[alias]:=fg=green}
: ${ZSH_HIGHLIGHT_STYLES[builtin]:=fg=green}
: ${ZSH_HIGHLIGHT_STYLES[function]:=fg=green}
: ${ZSH_HIGHLIGHT_STYLES[command]:=fg=green}
: ${ZSH_HIGHLIGHT_STYLES[command_prefix]:=fg=green}
: ${ZSH_HIGHLIGHT_STYLES[precommand]:=fg=green,underline}
: ${ZSH_HIGHLIGHT_STYLES[commandseparator]:=none}
: ${ZSH_HIGHLIGHT_STYLES[redirection]:=fg=magenta}
: ${ZSH_HIGHLIGHT_STYLES[hashed-command]:=fg=green}
: ${ZSH_HIGHLIGHT_STYLES[path]:=underline}
: ${ZSH_HIGHLIGHT_STYLES[path_prefix]:=underline}
: ${ZSH_HIGHLIGHT_STYLES[path_approx]:=fg=yellow,underline}
: ${ZSH_HIGHLIGHT_STYLES[file]:=}
: ${ZSH_HIGHLIGHT_STYLES[globbing]:=fg=blue}
: ${ZSH_HIGHLIGHT_STYLES[history-expansion]:=fg=blue}
: ${ZSH_HIGHLIGHT_STYLES[single-hyphen-option]:=none}
: ${ZSH_HIGHLIGHT_STYLES[double-hyphen-option]:=none}
: ${ZSH_HIGHLIGHT_STYLES[back-quoted-argument]:=none}
: ${ZSH_HIGHLIGHT_STYLES[single-quoted-argument]:=fg=yellow}
: ${ZSH_HIGHLIGHT_STYLES[double-quoted-argument]:=fg=yellow}
: ${ZSH_HIGHLIGHT_STYLES[dollar-double-quoted-argument]:=fg=cyan}
: ${ZSH_HIGHLIGHT_STYLES[back-double-quoted-argument]:=fg=cyan}
: ${ZSH_HIGHLIGHT_STYLES[assign]:=none}
# Whether the highlighter should be called or not.
_zsh_highlight_main_highlighter_predicate()
{
_zsh_highlight_buffer_modified
}
## In case we need to highlight in other circumstances then default from highlighter_predicate lets define a switcher
_zsh_highlight_main_highlighter_predicate_switcher()
{
case $1 in
'b') # buffer
_zsh_highlight_main_highlighter_predicate()
{
_zsh_highlight_buffer_modified
};;
'c') # cursor
_zsh_highlight_main_highlighter_predicate()
{
_zsh_highlight_cursor_moved
};;
'bc') bccounter=0 # buffer and cursor
_zsh_highlight_main_highlighter_predicate()
{
bccounter=$((bccounter+1))
(( $bccounter > 1 )) && _zsh_highlight_main_highlighter_predicate_switcher b
_zsh_highlight_cursor_moved || _zsh_highlight_buffer_modified
};;
*);;
esac
}
# Main syntax highlighting function.
_zsh_highlight_main_highlighter()
{
emulate -L zsh
setopt localoptions extendedglob bareglobqual
local start_pos=0 end_pos highlight_glob=true new_expression=true arg style lsstyle start_file_pos end_file_pos sudo=false sudo_arg=false
typeset -a ZSH_HIGHLIGHT_TOKENS_COMMANDSEPARATOR
typeset -a ZSH_HIGHLIGHT_TOKENS_REDIRECTION
typeset -a ZSH_HIGHLIGHT_TOKENS_PRECOMMANDS
typeset -a ZSH_HIGHLIGHT_TOKENS_FOLLOWED_BY_COMMANDS
region_highlight=()
ZSH_HIGHLIGHT_TOKENS_COMMANDSEPARATOR=(
'|' '||' ';' '&' '&&' '&|' '|&' '&!'
)
ZSH_HIGHLIGHT_TOKENS_REDIRECTION=(
'<' '<>' '>' '>|' '>!' '>>' '>>|' '>>!' '<<' '<<-' '<<<' '<&' '>&' '<& -' '>& -' '<& p' '>& p' '&>' '>&|' '>&!' '&>|' '&>!' '>>&' '&>>' '>>&|' '>>&!' '&>>|' '&>>!'
)
ZSH_HIGHLIGHT_TOKENS_PRECOMMANDS=(
'builtin' 'command' 'exec' 'nocorrect' 'noglob'
)
# Tokens that are always immediately followed by a command.
ZSH_HIGHLIGHT_TOKENS_FOLLOWED_BY_COMMANDS=(
$ZSH_HIGHLIGHT_TOKENS_COMMANDSEPARATOR $ZSH_HIGHLIGHT_TOKENS_PRECOMMANDS
)
splitbuf1=(${(z)BUFFER})
splitbuf2=(${(z)BUFFER//$'\n'/ \$\'\\\\n\' }) # ugly hack, but I have no other idea
local argnum=0
for arg in ${(z)BUFFER}; do
argnum=$((argnum+1))
if [[ $splitbuf1[$argnum] != $splitbuf2[$argnum] ]] && new_expression=true && continue
local substr_color=0 isfile=false
local style_override=""
[[ $start_pos -eq 0 && $arg = 'noglob' ]] && highlight_glob=false
((start_pos+=${#BUFFER[$start_pos+1,-1]}-${#${BUFFER[$start_pos+1,-1]##[[:space:]]#}}))
((end_pos=$start_pos+${#arg}))
# Parse the sudo command line
if $sudo; then
case "$arg" in
# Flag that requires an argument
'-'[Cgprtu]) sudo_arg=true;;
# This prevents misbehavior with sudo -u -otherargument
'-'*) sudo_arg=false;;
*) if $sudo_arg; then
sudo_arg=false
else
sudo=false
new_expression=true
fi
;;
esac
fi
if $new_expression; then
new_expression=false
if [[ -n ${(M)ZSH_HIGHLIGHT_TOKENS_PRECOMMANDS:#"$arg"} ]]; then
style=$ZSH_HIGHLIGHT_STYLES[precommand]
elif [[ "$arg" = "sudo" ]]; then
style=$ZSH_HIGHLIGHT_STYLES[precommand]
sudo=true
else
res=$(LC_ALL=C builtin type -w $arg 2>/dev/null)
case $res in
*': reserved') style=$ZSH_HIGHLIGHT_STYLES[reserved-word];;
*': alias') style=$ZSH_HIGHLIGHT_STYLES[alias]
local aliased_command="${"$(alias -- $arg)"#*=}"
[[ -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+=($arg)
;;
*': builtin') style=$ZSH_HIGHLIGHT_STYLES[builtin];;
*': function') style=$ZSH_HIGHLIGHT_STYLES[function];;
*': command') style=$ZSH_HIGHLIGHT_STYLES[command];;
*': hashed') style=$ZSH_HIGHLIGHT_STYLES[hashed-command];;
*) if _zsh_highlight_main_highlighter_check_assign; then
style=$ZSH_HIGHLIGHT_STYLES[assign]
new_expression=true
elif _zsh_highlight_main_highlighter_check_command; then
style=$ZSH_HIGHLIGHT_STYLES[command_prefix]
elif _zsh_highlight_main_highlighter_check_path; then
style=$ZSH_HIGHLIGHT_STYLES[path]
elif [[ $arg[0,1] == $histchars[0,1] || $arg[0,1] == $histchars[2,2] ]]; then
style=$ZSH_HIGHLIGHT_STYLES[history-expansion]
elif [[ -n ${(M)ZSH_HIGHLIGHT_TOKENS_COMMANDSEPARATOR:#"$arg"} ]]; then
style=$ZSH_HIGHLIGHT_STYLES[commandseparator]
elif [[ -n ${(M)ZSH_HIGHLIGHT_TOKENS_REDIRECTION:#"$arg"} ]]; then
style=$ZSH_HIGHLIGHT_STYLES[redirection]
else
style=$ZSH_HIGHLIGHT_STYLES[unknown-token]
fi
_zsh_highlight_main_highlighter_check_file && isfile=true
;;
esac
fi
else
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=$ZSH_HIGHLIGHT_STYLES[double-quoted-argument]
region_highlight+=("$start_pos $end_pos $style")
_zsh_highlight_main_highlighter_highlight_string
substr_color=1
;;
'`'*'`') style=$ZSH_HIGHLIGHT_STYLES[back-quoted-argument];;
*"*"*) $highlight_glob && style=$ZSH_HIGHLIGHT_STYLES[globbing] || style=$ZSH_HIGHLIGHT_STYLES[default];;
*) if _zsh_highlight_main_highlighter_check_path; then
style=$ZSH_HIGHLIGHT_STYLES[path]
elif [[ $arg[0,1] = $histchars[0,1] ]]; then
style=$ZSH_HIGHLIGHT_STYLES[history-expansion]
elif [[ -n ${(M)ZSH_HIGHLIGHT_TOKENS_COMMANDSEPARATOR:#"$arg"} ]]; then
style=$ZSH_HIGHLIGHT_STYLES[commandseparator]
elif [[ -n ${(M)ZSH_HIGHLIGHT_TOKENS_REDIRECTION:#"$arg"} ]]; then
style=$ZSH_HIGHLIGHT_STYLES[redirection]
else
style=$ZSH_HIGHLIGHT_STYLES[default]
fi
_zsh_highlight_main_highlighter_check_file && isfile=true
;;
esac
fi
# if a style_override was set (eg in _zsh_highlight_main_highlighter_check_path), use it
[[ -n $style_override ]] && style=$ZSH_HIGHLIGHT_STYLES[$style_override]
if [[ $isfile == true ]]; then
start_file_pos=$((start_pos+${#arg}-${#arg:t}))
end_file_pos=$end_pos
end_pos=$((end_pos-${#arg:t}))
region_highlight+=("$start_file_pos $end_file_pos $lsstyle")
fi
[[ $substr_color = 0 ]] && region_highlight+=("$start_pos $end_pos $style")
[[ -n ${(M)ZSH_HIGHLIGHT_TOKENS_FOLLOWED_BY_COMMANDS:#"$arg"} ]] && new_expression=true
[[ $isfile == true ]] && start_pos=$end_file_pos || start_pos=$end_pos
done
}
# Check if the argument is variable assignment
_zsh_highlight_main_highlighter_check_assign()
{
setopt localoptions extended_glob
[[ $arg == [[:alpha:]_][[:alnum:]_]#(|\[*\])=* ]]
}
# Check if the argument is a path.
_zsh_highlight_main_highlighter_check_path()
{
setopt localoptions nonomatch
local expanded_path; : ${expanded_path:=${(Q)~arg}}
[[ -z $expanded_path ]] && return 1
[[ -e $expanded_path ]] && return 0
# Search the path in CDPATH
local cdpath_dir
for cdpath_dir in $cdpath ; do
[[ -e "$cdpath_dir/$expanded_path" ]] && return 0
done
[[ ! -e ${expanded_path:h} ]] && return 1
if [[ ${BUFFER[1]} != "-" && ${#LBUFFER} == $end_pos ]]; then
local -a tmp
# got a path prefix?
tmp=( ${expanded_path}*(N) )
(( $#tmp > 0 )) && style_override=path_prefix && _zsh_highlight_main_highlighter_predicate_switcher bc && return 0
# or maybe an approximate path?
tmp=( (#a1)${expanded_path}*(N) )
(( $#arg > 3 && $#tmp > 0 )) && style_override=path_approx && return 0
fi
return 1
}
# Highlight special chars inside double-quoted strings
_zsh_highlight_main_highlighter_highlight_string()
{
setopt localoptions noksharrays
local i j k style varflag
# Starting quote is at 1, so start parsing at offset 2 in the string.
for (( i = 2 ; i < end_pos - start_pos ; i += 1 )) ; do
(( j = i + start_pos - 1 ))
(( k = j + 1 ))
case "$arg[$i]" in
'$' ) style=$ZSH_HIGHLIGHT_STYLES[dollar-double-quoted-argument]
(( varflag = 1))
;;
"\\") style=$ZSH_HIGHLIGHT_STYLES[back-double-quoted-argument]
for (( c = i + 1 ; c < end_pos - start_pos ; c += 1 )); do
[[ "$arg[$c]" != ([0-9,xX,a-f,A-F]) ]] && break
done
AA=$arg[$i+1,$c-1]
# Matching for HEX and OCT values like \0xA6, \xA6 or \012
if [[ "$AA" =~ "^(0*(x|X)[0-9,a-f,A-F]{1,2})" || "$AA" =~ "^(0[0-7]{1,3})" ]];then
(( k += $#MATCH ))
(( i += $#MATCH ))
else
(( k += 1 )) # Color following char too.
(( i += 1 )) # Skip parsing the escaped char.
fi
(( varflag = 0 )) # End of variable
;;
([^a-zA-Z0-9_]))
(( varflag = 0 )) # End of variable
continue
;;
*) [[ $varflag -eq 0 ]] && continue ;;
esac
region_highlight+=("$j $k $style")
done
}
## Check if command with given prefix exists
_zsh_highlight_main_highlighter_check_command()
{
setopt localoptions nonomatch
local -a prefixed_command
[[ $arg != $arg:t ]] && return 1 # don't match anything if explicit path is present
for p in $path; do prefixed_command+=( $p/${arg}*(N) ); done
[[ ${BUFFER[1]} != "-" && ${#LBUFFER} == $end_pos && $#prefixed_command > 0 ]] && return 0 || return 1
}
## Fill table with colors and file types from $LS_COLORS
_zsh_highlight_files_highlighter_fill_table_of_types()
{
local group type code ncolors=$(echotc Co)
local -a attrib
for group in ${(s.:.)LS_COLORS}; do
type=${group%=*}
code=${group#*=}
attrib=()
takeattrib ${(s.;.)code}
ZSH_HIGHLIGHT_FILES+=($type ${(j.,.)attrib})
done
}
## Take attributes from unfolded $LS_COLORS code
takeattrib()
{
while [ "$#" -gt 0 ]; do
[[ $1 == 38 && $2 == 5 ]] && {attrib+=("fg=$3"); shift 3; continue}
[[ $1 == 48 && $2 == 5 ]] && {attrib+=("bg=$3"); shift 3; continue}
case $1 in
00|0) attrib+=("none"); shift;;
01|1) attrib+=("bold" ); shift;;
02|2) attrib+=("faint"); shift;;
03|3) attrib+=("italic"); shift;;
04|4) attrib+=("underscore"); shift;;
05|5) attrib+=("blink"); shift;;
07|7) attrib+=("standout"); shift;;
08|8) attrib+=("concealed"); shift;;
3[0-7]) attrib+=("fg=$(($1-30))"); shift;;
4[0-7]) attrib+=("bg=$(($1-40))"); shift;;
9[0-7]) [[ $ncolors == 256 ]] && attrib+=("fg=$(($1-82))") || attrib+=("fg=$(($1-90))" "bold"); shift;;
10[0-7]) [[ $ncolors == 256 ]] && attrib+=("bg=$(($1-92))") || attrib+=("bg=$(($1-100))" "bold"); shift;;
*) shift;;
esac
done
}
## Check if the argument is a file, if yes change the style accordingly
_zsh_highlight_main_highlighter_check_file()
{
setopt localoptions nonomatch
local expanded_arg matched_file
expanded_arg=${(Q)~arg}
[[ -z $expanded_arg ]] && return 1
[[ -d $expanded_arg ]] && return 1
[[ ${BUFFER[1]} != "-" && ${#LBUFFER} == $end_pos ]] && matched_file=(${expanded_arg}*(Noa^/[1]))
[[ -e $expanded_arg || -e $matched_file ]] && lsstyle=none || return 1
[[ -e $matched_file ]] && _zsh_highlight_main_highlighter_predicate_switcher bc
[[ ! -z $ZSH_HIGHLIGHT_STYLES[file] ]] && lsstyle=$ZSH_HIGHLIGHT_STYLES[file] && return 0
# [[ rs ]]
# [[ -d $expanded_arg || -d $matched_file ]] && lsstyle=$ZSH_HIGHLIGHT_FILES[di] && return 0
[[ -h $expanded_arg || -h $matched_file ]] && lsstyle=$ZSH_HIGHLIGHT_FILES[ln] && return 0
# [[ mh ]]
[[ -p $expanded_arg || -p $matched_file ]] && lsstyle=$ZSH_HIGHLIGHT_FILES[pi] && return 0
[[ -S $expanded_arg || -S $matched_file ]] && lsstyle=$ZSH_HIGHLIGHT_FILES[so] && return 0
# [[ do ]]
[[ -b $expanded_arg || -b $matched_file ]] && lsstyle=$ZSH_HIGHLIGHT_FILES[bd] && return 0
[[ -c $expanded_arg || -c $matched_file ]] && lsstyle=$ZSH_HIGHLIGHT_FILES[cd] && return 0
# [[ or ]]
# [[ mi ]]
[[ -u $expanded_arg || -u $matched_file ]] && lsstyle=$ZSH_HIGHLIGHT_FILES[su] && return 0
[[ -g $expanded_arg || -g $matched_file ]] && lsstyle=$ZSH_HIGHLIGHT_FILES[sg] && return 0
# [[ ca ]]
# [[ tw ]]
# [[ ow ]]
[[ -k $expanded_arg || -k $matched_file ]] && lsstyle=$ZSH_HIGHLIGHT_FILES[st] && return 0
[[ -x $expanded_arg || -x $matched_file ]] && lsstyle=$ZSH_HIGHLIGHT_FILES[ex] && return 0
[[ -e $expanded_arg ]] && lsstyle=$ZSH_HIGHLIGHT_FILES[*.$expanded_arg:e] && return 0
[[ -n $matched_file:e ]] && lsstyle=$ZSH_HIGHLIGHT_FILES[*.$matched_file:e] && return 0
return 0
}
## Fill table only once, at the initialization process
_zsh_highlight_files_highlighter_fill_table_of_types