zsh-autosuggestions/src/bind.zsh

#--------------------------------------------------------------------#
# Widget Helpers                                                     #
#--------------------------------------------------------------------#

# Bind a single widget to an autosuggest widget, saving a reference to the original widget
_zsh_autosuggest_bind_widget() {
	local widget=$1
	local autosuggest_action=$2
	local prefix=$ZSH_AUTOSUGGEST_ORIGINAL_WIDGET_PREFIX

	# Save a reference to the original widget
	case $widgets[$widget] in
		# Already bound
		user:_zsh_autosuggest_(widget|orig)_*);;

		# User-defined widget
		user:*)
			zle -N $prefix$widget ${widgets[$widget]#*:}
			;;

		# Built-in widget
		builtin)
			eval "_zsh_autosuggest_orig_$widget() { zle .$widget }"
			zle -N $prefix$widget _zsh_autosuggest_orig_$widget
			;;

		# Completion widget
		completion:*)
			eval "zle -C $prefix$widget ${${widgets[$widget]#*:}/:/ }"
			;;
	esac

	# Create the bound widget
	zle -N $widget _zsh_autosuggest_widget_$autosuggest_action
}

# Map all configured widgets to the right autosuggest widgets
_zsh_autosuggest_bind_widgets() {
	local widget;

	# Find every widget we might want to bind and bind it appropriately
	for widget in ${${(f)"$(builtin zle -la)"}:#(.*|_*|orig-*|autosuggest-*|$ZSH_AUTOSUGGEST_ORIGINAL_WIDGET_PREFIX*|zle-line-*|run-help|which-command|beep|set-local-history|yank)}; do
		if [ ${ZSH_AUTOSUGGEST_CLEAR_WIDGETS[(r)$widget]} ]; then
			_zsh_autosuggest_bind_widget $widget clear
		elif [ ${ZSH_AUTOSUGGEST_ACCEPT_WIDGETS[(r)$widget]} ]; then
			_zsh_autosuggest_bind_widget $widget accept
		elif [ ${ZSH_AUTOSUGGEST_PARTIAL_ACCEPT_WIDGETS[(r)$widget]} ]; then
			_zsh_autosuggest_bind_widget $widget partial_accept
		else
			# Assume any unspecified widget might modify the buffer
			_zsh_autosuggest_bind_widget $widget modify
		fi
	done
}

# Given the name of a widget, invoke the original we saved, if it exists
_zsh_autosuggest_invoke_original_widget() {
	local original_widget_name="$ZSH_AUTOSUGGEST_ORIGINAL_WIDGET_PREFIX$WIDGET"

	if [ $widgets[$original_widget_name] ]; then
		zle $original_widget_name -- $@
	fi
}