File: public/js/tinymce/src/plugins/autosave/src/main/js/ui/Buttons.js

/**
 * Buttons.js
 *
 * Released under LGPL License.
 * Copyright (c) 1999-2017 Ephox Corp. All rights reserved
 *
 * License: http://www.tinymce.com/license
 * Contributing: http://www.tinymce.com/contributing
 */

define(
  'tinymce.plugins.autosave.ui.Buttons',
  [
    'tinymce.plugins.autosave.core.Storage'
  ],
  function (Storage) {
    var postRender = function (editor, started) {
      return function (e) {
        var ctrl = e.control;

        ctrl.disabled(!Storage.hasDraft(editor));

        editor.on('StoreDraft RestoreDraft RemoveDraft', function () {
          ctrl.disabled(!Storage.hasDraft(editor));
        });

        // TODO: Investigate why this is only done on postrender that would
        // make the feature broken if only the menu item was rendered since
        // it is rendered when the menu appears
        Storage.startStoreDraft(editor, started);
      };
    };

    var register = function (editor, started) {
      editor.addButton('restoredraft', {
        title: 'Restore last draft',
        onclick: function () {
          Storage.restoreLastDraft(editor);
        },
        onPostRender: postRender(editor, started)
      });

      editor.addMenuItem('restoredraft', {
        text: 'Restore last draft',
        onclick: function () {
          Storage.restoreLastDraft(editor);
        },
        onPostRender: postRender(editor, started),
        context: 'file'
      });
    };

    return {
      register: register
    };
  }
);