TinyMCE plugin: revert

revert.js

tinymce.PluginManager.add("revert", function (editor) {
    var content;
    editor.on("LoadContent", function () {
        content = editor.getContent();
    });
    editor.addMenuItem("revert", {
        text: "Revert changes",
        context: "file",
        onclick: function () {
            editor.undoManager.transact(function () {
                editor.setContent(content);
            });
        }
    });
});