# ------------------------------------------------------------------------------------------------- # Copyright (c) 2010-2016 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[suffix-alias]:=fg=green,underline} : ${ZSH_HIGHLIGHT_STYLES[builtin]:=fg=green} : ${ZSH_HIGHLIGHT_STYLES[function]:=fg=green} : ${ZSH_HIGHLIGHT_STYLES[command]:=fg=green} : ${ZSH_HIGHLIGHT_STYLES[precommand]:=fg=green,underline} : ${ZSH_HIGHLIGHT_STYLES[commandseparator]:=none} : ${ZSH_HIGHLIGHT_STYLES[hashed-command]:=fg=green} : ${ZSH_HIGHLIGHT_STYLES[path]:=underline} : ${ZSH_HIGHLIGHT_STYLES[path_pathseparator]:=} : ${ZSH_HIGHLIGHT_STYLES[path_prefix]:=underline} : ${ZSH_HIGHLIGHT_STYLES[path_prefix_pathseparator]:=} : ${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-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[back-dollar-quoted-argument]:=fg=cyan} : ${ZSH_HIGHLIGHT_STYLES[assign]:=none} : ${ZSH_HIGHLIGHT_STYLES[redirection]:=none} : ${ZSH_HIGHLIGHT_STYLES[comment]:=fg=black,bold} # Whether the highlighter should be called or not. _zsh_highlight_main_highlighter_predicate() { # may need to remove path_prefix highlighting when the line ends [[ $WIDGET == zle-line-finish ]] || _zsh_highlight_buffer_modified } # Helper to deal with tokens crossing line boundaries. _zsh_highlight_main_add_region_highlight() { integer start=$1 end=$2 shift 2 # The calculation was relative to $PREBUFFER$BUFFER, but region_highlight is # relative to $BUFFER. (( start -= $#PREBUFFER )) (( end -= $#PREBUFFER )) (( end < 0 )) && return # having end<0 would be a bug (( start < 0 )) && start=0 # having start<0 is normal with e.g. multiline strings _zsh_highlight_add_highlight $start $end "$@" } # Get the type of a command. # # Uses the zsh/parameter module if available to avoid forks, and a # wrapper around 'type -w' as fallback. # # Takes a single argument. # # The result will be stored in REPLY. _zsh_highlight_main__type() { if (( $+_zsh_highlight_main__command_type_cache )); then REPLY=$_zsh_highlight_main__command_type_cache[(e)$1] if [[ -n "$REPLY" ]]; then return fi fi if (( $#options_to_set )); then setopt localoptions $options_to_set; fi unset REPLY if zmodload -e zsh/parameter; then if (( $+aliases[(e)$1] )); then REPLY=alias elif (( $+saliases[(e)${1##*.}] )); then REPLY='suffix alias' elif (( $reswords[(Ie)$1] )); then REPLY=reserved elif (( $+functions[(e)$1] )); then REPLY=function elif (( $+builtins[(e)$1] )); then REPLY=builtin elif (( $+commands[(e)$1] )); then REPLY=command elif ! builtin type -w -- $1 >/dev/null 2>&1; then REPLY=none fi fi if ! (( $+REPLY )); then REPLY="${$(LC_ALL=C builtin type -w -- $1 2>/dev/null)#*: }" fi if (( $+_zsh_highlight_main__command_type_cache )); then _zsh_highlight_main__command_type_cache[(e)$1]=$REPLY fi } # Check whether the first argument is a redirection operator token. # Report result via the exit code. _zsh_highlight_main__is_redirection() { # A redirection operator token: # - starts with an optional single-digit number; # - then, has a '<' or '>' character; # - is not a process substitution [<(...) or >(...)]. [[ $1 == (<0-9>|)(\<|\>)* ]] && [[ $1 != (\<|\>)$'\x28'* ]] } # Resolve alias. # # Takes a single argument. # # The result will be stored in REPLY. _zsh_highlight_main__resolve_alias() { if zmodload -e zsh/parameter; then REPLY=${aliases[$arg]} else REPLY="${"$(alias -- $arg)"#*=}" fi } # Main syntax highlighting function. _zsh_highlight_main_highlighter() { ## Before we even 'emulate -L', we must test a few options that would reset. if [[ -o interactive_comments ]]; then local interactive_comments= # set to empty fi if [[ -o path_dirs ]]; then integer path_dirs_was_set=1 else integer path_dirs_was_set=0 fi emulate -L zsh setopt localoptions extendedglob bareglobqual # At the PS3 prompt and in vared, highlight nothing. # # (We can't check this in _zsh_highlight_main_highlighter_predicate because # if the predicate returns false, the previous value of region_highlight # would be reused.) if [[ $CONTEXT == (select|vared) ]]; then return fi ## Variable declarations and initializations local start_pos=0 end_pos highlight_glob=true arg style local in_array_assignment=false # true between 'a=(' and the matching ')' typeset -a ZSH_HIGHLIGHT_TOKENS_COMMANDSEPARATOR typeset -a ZSH_HIGHLIGHT_TOKENS_PRECOMMANDS typeset -a ZSH_HIGHLIGHT_TOKENS_CONTROL_FLOW local -a options_to_set # used in callees local buf="$PREBUFFER$BUFFER" integer len="${#buf}" if (( path_dirs_was_set )); then options_to_set+=( PATH_DIRS ) fi unset path_dirs_was_set ZSH_HIGHLIGHT_TOKENS_COMMANDSEPARATOR=( '|' '||' ';' '&' '&&' '|&' '&!' '&|' # ### 'case' syntax, but followed by a pattern, not by a command # ';;' ';&' ';|' ) ZSH_HIGHLIGHT_TOKENS_PRECOMMANDS=( 'builtin' 'command' 'exec' 'nocorrect' 'noglob' 'pkexec' # immune to #121 because it's usually not passed --option flags ) # Tokens that, at (naively-determined) "command position", are followed by # a de jure command position. All of these are reserved words. ZSH_HIGHLIGHT_TOKENS_CONTROL_FLOW=( $'\x7b' # block $'\x28' # subshell '()' # anonymous function 'while' 'until' 'if' 'then' 'elif' 'else' 'do' 'time' 'coproc' '!' # reserved word; unrelated to $histchars[1] ) # State machine # # The states are: # - :start: Command word # - :sudo_opt: A leading-dash option to sudo (such as "-u" or "-i") # - :sudo_arg: The argument to a sudo leading-dash option that takes one, # when given as a separate word; i.e., "foo" in "-u foo" (two # words) but not in "-ufoo" (one word). # - :regular: "Not a command word", and command delimiters are permitted. # Mainly used to detect premature termination of commands. # # When the kind of a word is not yet known, $this_word / $next_word may contain # multiple states. For example, after "sudo -i", the next word may be either # another --flag or a command name, hence the state would include both :start: # and :sudo_opt:. # # The tokens are always added with both leading and trailing colons to serve as # word delimiters (an improvised array); [[ $x == *:foo:* ]] and x=${x//:foo:/} # will DTRT regardless of how many elements or repetitions $x has.. # # Handling of redirections: upon seeing a redirection token, we must stall # the current state --- that is, the value of $this_word --- for two iterations # (one for the redirection operator, one for the word following it representing # the redirection target). Therefore, we set $in_redirection to 2 upon seeing a # redirection operator, decrement it each iteration, and stall the current state # when it is non-zero. Thus, upon reaching the next word (the one that follows # the redirection operator and target), $this_word will still contain values # appropriate for the word immediately following the word that preceded the # redirection operator. # # The "the previous word was a redirection operator" state is not communicated # to the next iteration via $next_word/$this_word as usual, but via # $in_redirection. The value of $next_word from the iteration that processed # the operator is discarded. # local this_word=':start:' next_word integer in_redirection # Processing buffer local proc_buf="$buf" for arg in ${interactive_comments-${(z)buf}} \ ${interactive_comments+${(zZ+c+)buf}}; do if (( in_redirection )); then (( --in_redirection )) fi if (( in_redirection == 0 )); then # Initialize $next_word to its default value. next_word=':regular:' else # Stall $next_word. fi # $already_added is set to 1 to disable adding an entry to region_highlight # for this iteration. Currently, that is done for "" and $'' strings, # which add the entry early so escape sequences within the string override # the string's color. integer already_added=0 style=unknown-token if [[ $this_word == *':start:'* ]]; then in_array_assignment=false if [[ $arg == 'noglob' ]]; then highlight_glob=false fi fi # advance $start_pos, skipping over whitespace in $buf. if [[ $arg == ';' ]] ; then # We're looking for either a semicolon or a newline, whichever comes # first. Both of these are rendered as a ";" (SEPER) by the ${(z)..} # flag. # # We can't use the (Z+n+) flag because that elides the end-of-command # token altogether, so 'echo foo\necho bar' (two commands) becomes # indistinguishable from 'echo foo echo bar' (one command with three # words for arguments). local needle=$'[;\n]' integer offset=$(( ${proc_buf[(i)$needle]} - 1 )) (( start_pos += offset )) (( end_pos = start_pos + $#arg )) else integer offset=$(((len-start_pos)-${#${proc_buf##([[:space:]]|\\[[:space:]])#}})) ((start_pos+=offset)) ((end_pos=$start_pos+${#arg})) fi # Above `if` computes new start_pos and end_pos. # Here we compute new proc_buf. We advance it # (chop off characters from the beginning) # beyond what end_pos points to, by skipping # as many characters as end_pos was advanced. # # end_pos was advanced by $offset (via start_pos) # and by $#arg. Note the `start_pos=$end_pos` # below. # # As for the [,len]. We could use [,len-start_pos+offset] # here, but to make it easier on eyes, we use len and # rely on the fact that Zsh simply handles that. The # length of proc_buf is len-start_pos+offset because # we're chopping it to match current start_pos, so its # length matches the previous value of start_pos. # # Why [,-1] is slower than [,length] isn't clear. proc_buf="${proc_buf[offset + $#arg + 1,len]}" if [[ -n ${interactive_comments+'set'} && $arg[1] == $histchars[3] ]]; then if [[ $this_word == *(':regular:'|':start:')* ]]; then style=comment else style=unknown-token # prematurely terminated fi _zsh_highlight_main_add_region_highlight $start_pos $end_pos $style already_added=1 continue fi if _zsh_highlight_main__is_redirection $arg ; then # A '<' or '>', possibly followed by a digit in_redirection=2 fi # Parse the sudo command line if (( ! in_redirection )); then if [[ $this_word == *':sudo_opt:'* ]]; then case "$arg" in # Flag that requires an argument '-'[Cgprtu]) this_word=${this_word//:start:/}; next_word=':sudo_arg:';; # This prevents misbehavior with sudo -u -otherargument '-'*) this_word=${this_word//:start:/}; next_word+=':start:'; next_word+=':sudo_opt:';; *) ;; esac elif [[ $this_word == *':sudo_arg:'* ]]; then next_word+=':sudo_opt:' next_word+=':start:' fi fi if [[ $this_word == *':start:'* ]] && (( in_redirection == 0 )); then # $arg is the command word if [[ -n ${(M)ZSH_HIGHLIGHT_TOKENS_PRECOMMANDS:#"$arg"} ]]; then style=precommand elif [[ "$arg" = "sudo" ]]; then style=precommand next_word=${next_word//:regular:/} next_word+=':sudo_opt:' next_word+=':start:' else _zsh_highlight_main_highlighter_expand_path $arg local expanded_arg="$REPLY" _zsh_highlight_main__type ${expanded_arg} local res="$REPLY" () { # Special-case: command word is '$foo', like that, without braces or anything. # # That's not entirely correct --- if the parameter's value happens to be a reserved # word, the parameter expansion will be highlighted as a reserved word --- but that # incorrectness is outweighed by the usability improvement of permitting the use of # parameters that refer to commands, functions, and builtins. local -a match mbegin mend local MATCH; integer MBEGIN MEND if [[ $res == none ]] && (( ${+parameters} )) && [[ ${arg[1]} == \$ ]] && [[ ${arg:1} =~ ^([A-Za-z_][A-Za-z0-9_]*|[0-9]+)$ ]] && (( ${+parameters[${MATCH}]} )) then _zsh_highlight_main__type ${(P)MATCH} res=$REPLY fi } case $res in reserved) style=reserved-word;; 'suffix alias') style=suffix-alias;; alias) () { integer insane_alias case $arg in # Issue #263: aliases with '=' on their LHS. # # There are three cases: # # - Unsupported, breaks 'alias -L' output, but invokable: ('='*) :;; # - Unsupported, not invokable: (*'='*) insane_alias=1;; # - The common case: (*) :;; esac if (( insane_alias )); then style=unknown-token else style=alias _zsh_highlight_main__resolve_alias $arg local alias_target="$REPLY" [[ -n ${(M)ZSH_HIGHLIGHT_TOKENS_PRECOMMANDS:#"$alias_target"} && -z ${(M)ZSH_HIGHLIGHT_TOKENS_PRECOMMANDS:#"$arg"} ]] && ZSH_HIGHLIGHT_TOKENS_PRECOMMANDS+=($arg) fi } ;; builtin) style=builtin;; function) style=function;; command) style=command;; hashed) style=hashed-command;; none) if _zsh_highlight_main_highlighter_check_assign; then style=assign if [[ $arg[-1] == '(' ]]; then in_array_assignment=true else # assignment to a scalar parameter. # (For array assignments, the command doesn't start until the ")" token.) next_word+=':start:' fi elif [[ $arg[0,1] = $histchars[0,1] ]] && (( $#arg[0,2] == 2 )); then style=history-expansion elif [[ $arg[0,1] == $histchars[2,2] ]]; then style=history-expansion elif [[ -n ${(M)ZSH_HIGHLIGHT_TOKENS_COMMANDSEPARATOR:#"$arg"} ]]; then if [[ $this_word == *':regular:'* ]]; then # This highlights empty commands (semicolon follows nothing) as an error. # Zsh accepts them, though. style=commandseparator else style=unknown-token fi elif (( in_redirection == 2 )); then style=redirection elif [[ $arg[1,2] == '((' ]]; then # Arithmetic evaluation. # # Note: prior to zsh-5.1.1-52-g4bed2cf (workers/36669), the ${(z)...} # splitter would only output the '((' token if the matching '))' had # been typed. Therefore, under those versions of zsh, BUFFER="(( 42" # would be highlighted as an error until the matching "))" are typed. # # We highlight just the opening parentheses, as a reserved word; this # is how [[ ... ]] is highlighted, too. style=reserved-word _zsh_highlight_main_add_region_highlight $start_pos $((start_pos + 2)) $style already_added=1 if [[ $arg[-2,-1] == '))' ]]; then _zsh_highlight_main_add_region_highlight $((end_pos - 2)) $end_pos $style already_added=1 fi elif [[ $arg == '()' || $arg == $'\x28' ]]; then # anonymous function # subshell style=reserved-word else if _zsh_highlight_main_highlighter_check_path; then style=$REPLY else style=unknown-token fi fi ;; *) _zsh_highlight_main_add_region_highlight $start_pos $end_pos commandtypefromthefuture-$res already_added=1 ;; esac fi fi if (( ! already_added )) && [[ $style == unknown-token ]] && # not handled by the 'command word' codepath { (( in_redirection )) || [[ $this_word == *':regular:'* ]] || [[ $this_word == *':sudo_opt:'* ]] || [[ $this_word == *':sudo_arg:'* ]] } then # $arg is a non-command word case $arg in $'\x29') # subshell or end of array assignment if $in_array_assignment; then style=assign in_array_assignment=false next_word+=':start:' else style=reserved-word fi;; $'\x7d') style=reserved-word;; # block '--'*) style=double-hyphen-option;; '-'*) style=single-hyphen-option;; "'"*) style=single-quoted-argument;; '"'*) style=double-quoted-argument _zsh_highlight_main_add_region_highlight $start_pos $end_pos $style _zsh_highlight_main_highlighter_highlight_string already_added=1 ;; \$\'*) style=dollar-quoted-argument _zsh_highlight_main_add_region_highlight $start_pos $end_pos $style _zsh_highlight_main_highlighter_highlight_dollar_string already_added=1 ;; '`'*) style=back-quoted-argument;; [*?]*|*[^\\][*?]*) $highlight_glob && style=globbing || style=default;; *) if false; then elif [[ $arg[0,1] = $histchars[0,1] ]] && (( $#arg[0,2] == 2 )); then style=history-expansion elif [[ -n ${(M)ZSH_HIGHLIGHT_TOKENS_COMMANDSEPARATOR:#"$arg"} ]]; then if [[ $this_word == *':regular:'* ]]; then style=commandseparator else style=unknown-token fi elif (( in_redirection == 2 )); then style=redirection else if _zsh_highlight_main_highlighter_check_path; then style=$REPLY else style=default fi fi ;; esac fi if ! (( already_added )); then _zsh_highlight_main_add_region_highlight $start_pos $end_pos $style [[ $style == path || $style == path_prefix ]] && _zsh_highlight_main_highlighter_highlight_path_separators fi if [[ -n ${(M)ZSH_HIGHLIGHT_TOKENS_COMMANDSEPARATOR:#"$arg"} ]]; then next_word=':start:' highlight_glob=true elif [[ -n ${(M)ZSH_HIGHLIGHT_TOKENS_CONTROL_FLOW:#"$arg"} && $this_word == *':start:'* ]] || [[ -n ${(M)ZSH_HIGHLIGHT_TOKENS_PRECOMMANDS:#"$arg"} && $this_word == *':start:'* ]]; then next_word=':start:' elif [[ $arg == "repeat" && $this_word == *':start:'* ]]; then # skip the repeat-count word in_redirection=2 # The redirection mechanism assumes $this_word describes the word # following the redirection. Make it so. # # That word can be a command word with shortloops (`repeat 2 ls`) # or a command separator (`repeat 2; ls` or `repeat 2; do ls; done`). # # The repeat-count word will be handled like a redirection target. this_word=':start::regular:' fi start_pos=$end_pos if (( in_redirection == 0 )); then # This is the default/common codepath. this_word=$next_word else # Stall $this_word. fi done } # Check if $arg is variable assignment _zsh_highlight_main_highlighter_check_assign() { setopt localoptions extended_glob [[ $arg == [[:alpha:]_][[:alnum:]_]#(|\[*\])(|[+])=* ]] || [[ $arg == [0-9]##(|[+])=* ]] } _zsh_highlight_main_highlighter_highlight_path_separators() { local pos style_pathsep style_pathsep=${style}_pathseparator [[ -z "$ZSH_HIGHLIGHT_STYLES[$style_pathsep]" || "$ZSH_HIGHLIGHT_STYLES[$style]" == "$ZSH_HIGHLIGHT_STYLES[$style_pathsep]" ]] && return 0 for (( pos = start_pos; $pos <= end_pos; pos++ )) ; do if [[ $BUFFER[pos] == / ]]; then _zsh_highlight_main_add_region_highlight $((pos - 1)) $pos $style_pathsep fi done } # Check if $arg is a path. # If yes, return 0 and in $REPLY the style to use. # Else, return non-zero (and the contents of $REPLY is undefined). _zsh_highlight_main_highlighter_check_path() { _zsh_highlight_main_highlighter_expand_path $arg; local expanded_path="$REPLY" REPLY=path [[ -z $expanded_path ]] && return 1 [[ -L $expanded_path ]] && return 0 [[ -e $expanded_path ]] && return 0 # Search the path in CDPATH local cdpath_dir for cdpath_dir in $cdpath ; do [[ -e "$cdpath_dir/$expanded_path" ]] && return 0 done # If dirname($arg) doesn't exist, neither does $arg. [[ ! -d ${expanded_path:h} ]] && return 1 # If this word ends the buffer, check if it's the prefix of a valid path. if [[ ${BUFFER[1]} != "-" && ${#BUFFER} == $end_pos ]] && [[ $WIDGET != zle-line-finish ]]; then local -a tmp tmp=( ${expanded_path}*(N) ) (( $#tmp > 0 )) && REPLY=path_prefix && return 0 fi # It's not a path. return 1 } # Highlight special chars inside double-quoted strings _zsh_highlight_main_highlighter_highlight_string() { setopt localoptions noksharrays local -a match mbegin mend local MATCH; integer MBEGIN MEND local i j k style # Starting quote is at 1, so start parsing at offset 2 in the string. for (( i = 2 ; i < end_pos - start_pos ; i += 1 )) ; do (( j = i + start_pos - 1 )) (( k = j + 1 )) case "$arg[$i]" in '$' ) style=dollar-double-quoted-argument # Look for an alphanumeric parameter name. if [[ ${arg:$i} =~ ^([A-Za-z_][A-Za-z0-9_]*|[0-9]+) ]] ; then (( k += $#MATCH )) # highlight the parameter name (( i += $#MATCH )) # skip past it elif [[ ${arg:$i} =~ ^[{]([A-Za-z_][A-Za-z0-9_]*|[0-9]+)[}] ]] ; then (( k += $#MATCH )) # highlight the parameter name and braces (( i += $#MATCH )) # skip past it else continue fi ;; "\\") style=back-double-quoted-argument if [[ \\\`\"\$ == *$arg[$i+1]* ]]; then (( k += 1 )) # Color following char too. (( i += 1 )) # Skip parsing the escaped char. else continue fi ;; *) continue ;; esac _zsh_highlight_main_add_region_highlight $j $k $style done } # Highlight special chars inside dollar-quoted strings _zsh_highlight_main_highlighter_highlight_dollar_string() { setopt localoptions noksharrays local -a match mbegin mend local MATCH; integer MBEGIN MEND local i j k style local AA integer c # Starting dollar-quote is at 1:2, so start parsing at offset 3 in the string. for (( i = 3 ; i < end_pos - start_pos ; i += 1 )) ; do (( j = i + start_pos - 1 )) (( k = j + 1 )) case "$arg[$i]" in "\\") style=back-dollar-quoted-argument for (( c = i + 1 ; c <= end_pos - start_pos ; c += 1 )); do [[ "$arg[$c]" != ([0-9xXuUa-fA-F]) ]] && break done AA=$arg[$i+1,$c-1] # Matching for HEX and OCT values like \0xA6, \xA6 or \012 if [[ "$AA" =~ "^(x|X)[0-9a-fA-F]{1,2}" || "$AA" =~ "^[0-7]{1,3}" || "$AA" =~ "^u[0-9a-fA-F]{1,4}" || "$AA" =~ "^U[0-9a-fA-F]{1,8}" ]]; then (( k += $#MATCH )) (( i += $#MATCH )) else if (( $#arg > $i+1 )) && [[ $arg[$i+1] == [xXuU] ]]; then # \x not followed by hex digits is probably an error style=unknown-token fi (( k += 1 )) # Color following char too. (( i += 1 )) # Skip parsing the escaped char. fi ;; *) continue ;; esac _zsh_highlight_main_add_region_highlight $j $k $style done } # Called with a single positional argument. # Perform filename expansion (tilde expansion) on the argument and set $REPLY to the expanded value. # # Does not perform filename generation (globbing). _zsh_highlight_main_highlighter_expand_path() { (( $# == 1 )) || print -r -- >&2 "zsh-syntax-highlighting: BUG: _zsh_highlight_main_highlighter_expand_path: called without argument" # The $~1 syntax normally performs filename generation, but not when it's on the right-hand side of ${x:=y}. setopt localoptions nonomatch unset REPLY : ${REPLY:=${(Q)~1}} } # ------------------------------------------------------------------------------------------------- # Main highlighter initialization # ------------------------------------------------------------------------------------------------- _zsh_highlight_main__precmd_hook() { _zsh_highlight_main__command_type_cache=() } autoload -U add-zsh-hook if add-zsh-hook precmd _zsh_highlight_main__precmd_hook 2>/dev/null; then # Initialize command type cache typeset -gA _zsh_highlight_main__command_type_cache else print -r -- >&2 'zsh-syntax-highlighting: Failed to load add-zsh-hook. Some speed optimizations will not be used.' # Make sure the cache is unset unset _zsh_highlight_main__command_type_cache fi