471 lines
20 KiB
Bash
471 lines
20 KiB
Bash
# -------------------------------------------------------------------------------------------------
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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[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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: ${ZSH_HIGHLIGHT_STYLES[comment]:=fg=black,bold}
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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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# accept-* may trigger removal of path_prefix highlighting
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[[ $WIDGET == accept-* ]] ||
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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 $style")
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}
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# Main syntax highlighting function.
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_zsh_highlight_main_highlighter()
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{
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if [[ -o interactive_comments ]]; then
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local interactive_comments= # set to empty
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fi
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emulate -L zsh
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setopt localoptions extendedglob bareglobqual
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local start_pos=0 end_pos highlight_glob=true arg style
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typeset -a ZSH_HIGHLIGHT_TOKENS_COMMANDSEPARATOR
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typeset -a ZSH_HIGHLIGHT_TOKENS_PRECOMMANDS
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typeset -a ZSH_HIGHLIGHT_TOKENS_CONTROL_FLOW
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local buf="$PREBUFFER$BUFFER"
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region_highlight=()
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ZSH_HIGHLIGHT_TOKENS_COMMANDSEPARATOR=(
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'|' '||' ';' '&' '&&'
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)
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ZSH_HIGHLIGHT_TOKENS_PRECOMMANDS=(
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'builtin' 'command' 'exec' 'nocorrect' 'noglob'
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)
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# Tokens that, at (naively-determined) "command position", are followed by
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# a de jure command position. All of these are reserved words.
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ZSH_HIGHLIGHT_TOKENS_CONTROL_FLOW=(
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$'\x7b' # block
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$'\x28' # subshell
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'()' # anonymous function
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'while'
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'until'
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'if'
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'then'
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'elif'
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'else'
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'do'
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'time'
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'coproc'
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'!' # reserved word; unrelated to $histchars[1]
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)
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# State machine
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#
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# The states are:
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# - :start: Command word
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# - :sudo_opt: A leading-dash option to sudo (such as "-u" or "-i")
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# - :sudo_arg: The argument to a sudo leading-dash option that takes one,
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# when given as a separate word; i.e., "foo" in "-u foo" (two
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# words) but not in "-ufoo" (one word).
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# - :regular: "Not a command word".
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# Mainly used to detect premature termination of commands.
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#
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# The tokens are always added with both leading and trailing colons to serve as
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# word delimiters (an improvised array); [[ $x == *:foo:* ]] and x=${x//:foo:/}
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# will DTRT regardless of how many elements or repetitions $x has..
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#
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# Handling of redirections: upon seeing a redirection token, we must stall
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# the current state --- that is, the value of $this_word --- for two iterations
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# (one for the redirection operator, one for the word following it representing
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# the redirection target). Therefore, we set $in_redirection to 2 upon seeing a
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# redirection operator, decrement it each iteration, and stall the current state
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# when it is non-zero. Thus, upon reaching the next word (the one that follows
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# the redirection operator and target), $this_word will still contain values
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# appropriate for the word immediately following the word that preceded the
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# redirection operator.
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#
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# The "the previous word was a redirection operator" state is not communicated
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# to the next iteration via $next_word/$this_word as usual, but via
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# $in_redirection. The value of $next_word from the iteration that processed
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# the operator is discarded.
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#
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local this_word=':start:' next_word
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integer in_redirection
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for arg in ${interactive_comments-${(z)buf}} \
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${interactive_comments+${(zZ+c+)buf}}; do
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if (( in_redirection )); then
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(( --in_redirection ))
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fi
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if (( in_redirection == 0 )); then
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next_word=':regular:'
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fi
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# $already_added 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 already_added=0
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local style_override=""
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if [[ $this_word == *':start:'* ]] && [[ $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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if [[ ${interactive_comments+'set'} && $arg[1] == $histchars[3] ]]; then
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if [[ $this_word == *(':regular:'|':start:')* ]]; then
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style=$ZSH_HIGHLIGHT_STYLES[comment]
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else
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style=$ZSH_HIGHLIGHT_STYLES[unknown-token] # prematurely terminated
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fi
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_zsh_highlight_main_add_region_highlight $start_pos $end_pos $style
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already_added=1
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continue
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fi
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# Parse the sudo command line
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if (( ! in_redirection )); then
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if [[ $this_word == *':sudo_opt:'* ]]; then
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case "$arg" in
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# Flag that requires an argument
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'-'[Cgprtu]) this_word=${this_word//:start:/};
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next_word=':sudo_arg:';;
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# This prevents misbehavior with sudo -u -otherargument
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'-'*) this_word=${this_word//:start:/};
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next_word+=':start:';
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next_word+=':sudo_opt:';;
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*) ;;
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esac
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elif [[ $this_word == *':sudo_arg:'* ]]; then
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next_word+=':sudo_opt:'
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next_word+=':start:'
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fi
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fi
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if [[ $this_word == *':start:'* ]] && (( in_redirection == 0 )); then # $arg is the command word
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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=$ZSH_HIGHLIGHT_STYLES[precommand]
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next_word=${next_word//:regular:/}
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next_word+=':sudo_opt:'
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next_word+=':start:'
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else
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_zsh_highlight_main_highlighter_expand_path $arg
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local expanded_arg="$REPLY"
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local res="$(LC_ALL=C builtin type -w -- ${expanded_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 ${(M)ZSH_HIGHLIGHT_TOKENS_PRECOMMANDS:#"$aliased_command"} && -z ${(M)ZSH_HIGHLIGHT_TOKENS_PRECOMMANDS:#"$arg"} ]] && ZSH_HIGHLIGHT_TOKENS_PRECOMMANDS+=($arg)
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;;
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*': builtin') style=$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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next_word+=':start:'
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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 [[ -n ${(M)ZSH_HIGHLIGHT_TOKENS_COMMANDSEPARATOR:#"$arg"} ]] &&
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[[ $this_word == *':regular:'* ]]; then
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# This highlights empty commands (semicolon follows nothing) as an error.
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# Zsh accepts them, though.
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style=$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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(( in_redirection=2 ))
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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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already_added=1
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elif [[ $arg == '()' ]]; then
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# anonymous function
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style=$ZSH_HIGHLIGHT_STYLES[reserved-word]
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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 a non-command word
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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 $style
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_zsh_highlight_main_highlighter_highlight_string
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already_added=1
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;;
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\$\'*) style=$ZSH_HIGHLIGHT_STYLES[dollar-quoted-argument]
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_zsh_highlight_main_add_region_highlight $start_pos $end_pos $style
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_zsh_highlight_main_highlighter_highlight_dollar_string
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already_added=1
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;;
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'`'*) style=$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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if [[ $this_word == *':regular:'* ]]; then
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style=$ZSH_HIGHLIGHT_STYLES[commandseparator]
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else
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style=$ZSH_HIGHLIGHT_STYLES[unknown-token]
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fi
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elif [[ $arg[1] == '<' || $arg[1] == '>' ]]; then
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style=$ZSH_HIGHLIGHT_STYLES[redirection]
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(( in_redirection=2 ))
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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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(( already_added )) || _zsh_highlight_main_add_region_highlight $start_pos $end_pos $style
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if [[ -n ${(M)ZSH_HIGHLIGHT_TOKENS_COMMANDSEPARATOR:#"$arg"} ]]; then
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next_word=':start:'
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elif
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[[ -n ${(M)ZSH_HIGHLIGHT_TOKENS_CONTROL_FLOW:#"$arg"} && $this_word == *':start:' ]] ||
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[[ -n ${(M)ZSH_HIGHLIGHT_TOKENS_PRECOMMANDS:#"$arg"} && $this_word == *':start:' ]]; then
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next_word=':start:'
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fi
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[[ -n ${(M)ZSH_HIGHLIGHT_TOKENS_COMMANDSEPARATOR:#"$arg"} ]] && highlight_glob=true
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start_pos=$end_pos
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(( in_redirection == 0 )) && this_word=$next_word
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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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_zsh_highlight_main_highlighter_expand_path $arg;
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local expanded_path="$REPLY"
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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/$expanded_path" ]] && return 0
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done
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# If dirname($arg) doesn't exist, neither does $arg.
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[[ ! -e ${expanded_path:h} ]] && return 1
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# If this word ends the buffer, check if it's the prefix of a valid path.
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if [[ ${BUFFER[1]} != "-" && ${#BUFFER} == $end_pos ]] &&
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[[ $WIDGET != accept-* ]]; then
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local -a tmp
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tmp=( ${expanded_path}*(N) )
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(( $#tmp > 0 )) && style_override=path_prefix && return 0
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fi
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# It's not a path.
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return 1
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}
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# Highlight special chars inside double-quoted strings
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_zsh_highlight_main_highlighter_highlight_string()
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{
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setopt localoptions noksharrays
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local i j k style
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# Starting quote is at 1, so start parsing at offset 2 in the string.
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for (( i = 2 ; i < end_pos - start_pos ; i += 1 )) ; do
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(( j = i + start_pos - 1 ))
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(( k = j + 1 ))
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case "$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
|
|
(( 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 $style
|
|
done
|
|
}
|
|
|
|
# Highlight special chars inside dollar-quoted strings
|
|
_zsh_highlight_main_highlighter_highlight_dollar_string()
|
|
{
|
|
setopt localoptions noksharrays
|
|
local i j k style
|
|
local AA
|
|
integer c
|
|
# Starting dollar-quote is at 1:2, so start parsing at offset 3 in the string.
|
|
for (( i = 3 ; i < end_pos - start_pos ; i += 1 )) ; do
|
|
(( j = i + start_pos - 1 ))
|
|
(( k = j + 1 ))
|
|
case "$arg[$i]" in
|
|
"\\") style=$ZSH_HIGHLIGHT_STYLES[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=$ZSH_HIGHLIGHT_STYLES[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 )) || echo "zsh-syntax-highlighting: BUG: _zsh_highlight_main_highlighter_expand_path: called without argument" >&2
|
|
|
|
# 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}}
|
|
}
|