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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
- # -------------------------------------------------------------------------------------------------
-
-
- # -------------------------------------------------------------------------------------------------
- # Core highlighting update system
- # -------------------------------------------------------------------------------------------------
-
- # Array declaring active highlighters names.
- typeset -ga ZSH_HIGHLIGHT_HIGHLIGHTERS
-
- # Update ZLE buffer syntax highlighting.
- #
- # Invokes each highlighter that needs updating.
- # This function is supposed to be called whenever the ZLE state changes.
- _zsh_highlight()
- {
- setopt localoptions nowarncreateglobal
-
- # Store the previous command return code to restore it whatever happens.
- local ret=$?
-
- # Do not highlight if there are more than 300 chars in the buffer. It's most
- # likely a pasted command or a huge list of files in that case..
- [[ -n ${ZSH_HIGHLIGHT_MAXLENGTH:-} ]] && [[ $#BUFFER -gt $ZSH_HIGHLIGHT_MAXLENGTH ]] && return $ret
-
- # Do not highlight if there are pending inputs (copy/paste).
- [[ $PENDING -gt 0 ]] && return $ret
-
- # Reset region highlight to build it from scratch
- region_highlight=();
-
- {
- local cache_place
- local -a region_highlight_copy
-
- # Select which highlighters in ZSH_HIGHLIGHT_HIGHLIGHTERS need to be invoked.
- local highlighter; for highlighter in $ZSH_HIGHLIGHT_HIGHLIGHTERS; do
-
- # eval cache place for current highlighter and prepare it
- cache_place="_zsh_highlight_${highlighter}_highlighter_cache"
- typeset -ga ${cache_place}
-
- # If highlighter needs to be invoked
- if "_zsh_highlight_${highlighter}_highlighter_predicate"; then
-
- # save a copy, and cleanup region_highlight
- region_highlight_copy=("${region_highlight[@]}")
- region_highlight=()
-
- # Execute highlighter and save result
- {
- "_zsh_highlight_${highlighter}_highlighter"
- } always {
- eval "${cache_place}=(\"\${region_highlight[@]}\")"
- }
-
- # Restore saved region_highlight
- region_highlight=("${region_highlight_copy[@]}")
-
- fi
-
- # Use value form cache if any cached
- eval "region_highlight+=(\"\${${cache_place}[@]}\")"
-
- done
-
- } always {
- _ZSH_HIGHLIGHT_PRIOR_BUFFER=$BUFFER
- _ZSH_HIGHLIGHT_PRIOR_CURSOR=$CURSOR
- return $ret
- }
- }
-
-
- # -------------------------------------------------------------------------------------------------
- # API/utility functions for highlighters
- # -------------------------------------------------------------------------------------------------
-
- # Array used by highlighters to declare user overridable styles.
- typeset -gA ZSH_HIGHLIGHT_STYLES
-
- # Whether the command line buffer has been modified or not.
- #
- # Returns 0 if the buffer has changed since _zsh_highlight was last called.
- _zsh_highlight_buffer_modified()
- {
- [[ "${_ZSH_HIGHLIGHT_PRIOR_BUFFER:-}" != "$BUFFER" ]]
- }
-
- # Whether the cursor has moved or not.
- #
- # Returns 0 if the cursor has moved since _zsh_highlight was last called.
- _zsh_highlight_cursor_moved()
- {
- [[ -n $CURSOR ]] && [[ -n ${_ZSH_HIGHLIGHT_PRIOR_CURSOR-} ]] && (($_ZSH_HIGHLIGHT_PRIOR_CURSOR != $CURSOR))
- }
-
-
- # -------------------------------------------------------------------------------------------------
- # Setup functions
- # -------------------------------------------------------------------------------------------------
-
- # Rebind all ZLE widgets to make them invoke _zsh_highlights.
- _zsh_highlight_bind_widgets()
- {
- # Load ZSH module zsh/zleparameter, needed to override user defined widgets.
- zmodload zsh/zleparameter 2>/dev/null || {
- echo 'zsh-syntax-highlighting: failed loading zsh/zleparameter.' >&2
- return 1
- }
-
- # Override ZLE widgets to make them invoke _zsh_highlight.
- local cur_widget
- for cur_widget in ${${(f)"$(builtin zle -la)"}:#(.*|_*|orig-*|run-help|which-command|beep|yank*)}; do
- case $widgets[$cur_widget] in
-
- # Already rebound event: do nothing.
- user:$cur_widget|user:_zsh_highlight_widget_*);;
-
- # User defined widget: override and rebind old one with prefix "orig-".
- user:*) eval "zle -N orig-$cur_widget ${widgets[$cur_widget]#*:}; \
- _zsh_highlight_widget_$cur_widget() { builtin zle orig-$cur_widget -- \"\$@\" && _zsh_highlight }; \
- zle -N $cur_widget _zsh_highlight_widget_$cur_widget";;
-
- # Completion widget: override and rebind old one with prefix "orig-".
- completion:*) eval "zle -C orig-$cur_widget ${${widgets[$cur_widget]#*:}/:/ }; \
- _zsh_highlight_widget_$cur_widget() { builtin zle orig-$cur_widget -- \"\$@\" && _zsh_highlight }; \
- zle -N $cur_widget _zsh_highlight_widget_$cur_widget";;
-
- # Builtin widget: override and make it call the builtin ".widget".
- builtin) eval "_zsh_highlight_widget_$cur_widget() { builtin zle .$cur_widget -- \"\$@\" && _zsh_highlight }; \
- zle -N $cur_widget _zsh_highlight_widget_$cur_widget";;
-
- # Default: unhandled case.
- *) echo "zsh-syntax-highlighting: unhandled ZLE widget '$cur_widget'" >&2 ;;
- esac
- done
- }
-
- # Load highlighters from directory.
- #
- # Arguments:
- # 1) Path to the highlighters directory.
- _zsh_highlight_load_highlighters()
- {
- # Check the directory exists.
- [[ -d "$1" ]] || {
- echo "zsh-syntax-highlighting: highlighters directory '$1' not found." >&2
- return 1
- }
-
- # Load highlighters from highlighters directory and check they define required functions.
- local highlighter highlighter_dir
- for highlighter_dir ($1/*/); do
- highlighter="${highlighter_dir:t}"
- [[ -f "$highlighter_dir/${highlighter}-highlighter.zsh" ]] && {
- . "$highlighter_dir/${highlighter}-highlighter.zsh"
- type "_zsh_highlight_${highlighter}_highlighter" &> /dev/null &&
- type "_zsh_highlight_${highlighter}_highlighter_predicate" &> /dev/null || {
- echo "zsh-syntax-highlighting: '${highlighter}' highlighter should define both required functions '_zsh_highlight_${highlighter}_highlighter' and '_zsh_highlight_${highlighter}_highlighter_predicate' in '${highlighter_dir}/${highlighter}-highlighter.zsh'." >&2
- }
- }
- done
- }
-
-
- # -------------------------------------------------------------------------------------------------
- # Setup
- # -------------------------------------------------------------------------------------------------
-
- # Try binding widgets.
- _zsh_highlight_bind_widgets || {
- echo 'zsh-syntax-highlighting: failed binding ZLE widgets, exiting.' >&2
- return 1
- }
-
- # Resolve highlighters directory location.
- _zsh_highlight_load_highlighters "${ZSH_HIGHLIGHT_HIGHLIGHTERS_DIR:-${${0:A}:h}/highlighters}" || {
- echo 'zsh-syntax-highlighting: failed loading highlighters, exiting.' >&2
- return 1
- }
-
- # Reset scratch variables when commandline is done.
- _zsh_highlight_preexec_hook()
- {
- _ZSH_HIGHLIGHT_PRIOR_BUFFER=
- _ZSH_HIGHLIGHT_PRIOR_CURSOR=
- }
- autoload -U add-zsh-hook
- add-zsh-hook preexec _zsh_highlight_preexec_hook 2>/dev/null || {
- echo 'zsh-syntax-highlighting: failed loading add-zsh-hook.' >&2
- }
-
- # Initialize the array of active highlighters if needed.
- [[ $#ZSH_HIGHLIGHT_HIGHLIGHTERS -eq 0 ]] && ZSH_HIGHLIGHT_HIGHLIGHTERS=(main) || true
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