undomanager.js

$.sceditor.plugins.undomanager = function() {
	var base = this;

	base.init = function() {
		// The this variable will be set to the instance of the editor calling it,
		// hence why the plugins "this" is saved to the base variable.

		// addShortcut is the easiest way to add handlers to specific shortcuts
		this.addShortcut('ctrl+z', base.undo);
		this.addShortcut('ctrl+shift+z', base.redo);
		this.addShortcut('ctrl+y', base.redo);
	};

	base.undo = function() {
		alert('Undo!');

		// Prevent the default action
		return false;
	};

	base.redo = function() {
		alert('Redo!');

		// Prevent the default action
		return false;
	};
};