ylib/zsh-syntax-highlighting
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Isolate setup code in functions to ease messing with zsh-syntax-highlighting

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Julien Nicoulaud 2011-07-31 17:59:55 +02:00
parent 5003fa7c9b
commit 0e331cd654
1 changed files with 75 additions and 48 deletions
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123
zsh-syntax-highlighting.zsh
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@ -118,62 +118,89 @@ _zsh_highlight_cursor_moved()
}
# -------------------------------------------------------------------------------------------------
# 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)}; do
case $widgets[$cur_widget] in
# Already rebound event: do nothing.
user:$cur_widget);;
# User defined widget: override and rebind old one with prefix "orig-".
user:*) eval "zle -N orig-$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}/${highlighter}-highlighter.zsh'." >&2
}
}
done
}
# -------------------------------------------------------------------------------------------------
# Setup
# -------------------------------------------------------------------------------------------------
# Load ZSH module zsh/zleparameter, needed to override user defined widgets.
zmodload zsh/zleparameter 2>/dev/null || {
echo 'zsh-syntax-highlighting: failed loading zsh/zleparameter, exiting.' >&2
return -1
# Try binding widgets.
_zsh_highlight_bind_widgets || {
echo 'zsh-syntax-highlighting: failed binding ZLE widgets, exiting.' >&2
return 1
}
# Resolve highlighters directory location.
highlighters_dir="${ZSH_HIGHLIGHT_HIGHLIGHTERS_DIR:-${0:h}/highlighters}"
[[ -d $highlighters_dir ]] || {
echo "zsh-syntax-highlighting: highlighters directory '$highlighters_dir' not found, exiting." >&2
return -1
_zsh_highlight_load_highlighters "${ZSH_HIGHLIGHT_HIGHLIGHTERS_DIR:-${0:h}/highlighters}" || {
echo 'zsh-syntax-highlighting: failed loading highlighters, exiting.' >&2
return 1
}
# Override ZLE widgets to make them invoke _zsh_highlight.
for cur_widget in ${${(f)"$(builtin zle -la)"}:#(.*|orig-*|run-help|which-command|beep)}; do
case $widgets[$cur_widget] in
# Already rebound event: do nothing.
user:$cur_widget);;
# User defined widget: override and rebind old one with prefix "orig-".
user:*) eval "zle -N orig-$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 '$cur_widget'" >&2 ;;
esac
done
unset cur_widget
# Load highlighters from highlighters directory and check they define required functions.
for highlighter_dir ($highlighters_dir/*/); 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
unset highlighter highlighter_dir highlighters_dir
# Initialize the array of active highlighters if needed.
[[ $#ZSH_HIGHLIGHT_HIGHLIGHTERS -eq 0 ]] && ZSH_HIGHLIGHT_HIGHLIGHTERS=(main)