File: public/js/tinymce/src/ui/src/main/js/editorui/UndoRedo.js

/**
 * UndoRedo.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.ui.editorui.UndoRedo',
  [
  ],
  function () {
    var toggleUndoRedoState = function (editor, type) {
      return function () {
        var self = this;

        var checkState = function () {
          var typeFn = type === 'redo' ? 'hasRedo' : 'hasUndo';
          return editor.undoManager ? editor.undoManager[typeFn]() : false;
        };

        self.disabled(!checkState());
        editor.on('Undo Redo AddUndo TypingUndo ClearUndos SwitchMode', function () {
          self.disabled(editor.readonly || !checkState());
        });
      };
    };

    var registerMenuItems = function (editor) {
      editor.addMenuItem('undo', {
        text: 'Undo',
        icon: 'undo',
        shortcut: 'Meta+Z',
        onPostRender: toggleUndoRedoState(editor, 'undo'),
        cmd: 'undo'
      });

      editor.addMenuItem('redo', {
        text: 'Redo',
        icon: 'redo',
        shortcut: 'Meta+Y',
        onPostRender: toggleUndoRedoState(editor, 'redo'),
        cmd: 'redo'
      });
    };

    var registerButtons = function (editor) {
      editor.addButton('undo', {
        tooltip: 'Undo',
        onPostRender: toggleUndoRedoState(editor, 'undo'),
        cmd: 'undo'
      });

      editor.addButton('redo', {
        tooltip: 'Redo',
        onPostRender: toggleUndoRedoState(editor, 'redo'),
        cmd: 'redo'
      });
    };

    var register = function (editor) {
      registerMenuItems(editor);
      registerButtons(editor);
    };

    return {
      register: register
    };
  }
);