* Copyright (c) 1999-2017 Ephox Corp. All rights reserved

  this.settings = [];

  this.onChange = tinyMCEPopup.editor.windowManager.createInstance('tinymce.util.Dispatcher');

}

MCTabs.prototype.init = function (settings) {

  this.settings = settings;

MCTabs.prototype.getParam = function (name, default_value) {

  var value = null;

  value = (typeof (this.settings[name]) == "undefined") ? default_value : this.settings[name];

  // Fix bool values

  if (value == "true" || value == "false") {

    return (value == "true");

  }

  return value;

MCTabs.prototype.showTab = function (tab) {

  tab.className = 'current';

  tab.setAttribute("aria-selected", true);

  tab.setAttribute("aria-expanded", true);

  tab.tabIndex = 0;

MCTabs.prototype.hideTab = function (tab) {

  var t = this;

  tab.className = '';

  tab.setAttribute("aria-selected", false);

  tab.setAttribute("aria-expanded", false);

  tab.tabIndex = -1;

MCTabs.prototype.showPanel = function (panel) {

  panel.className = 'current';

  panel.setAttribute("aria-hidden", false);

MCTabs.prototype.hidePanel = function (panel) {

  panel.className = 'panel';

  panel.setAttribute("aria-hidden", true);

};

MCTabs.prototype.getPanelForTab = function (tabElm) {

  return tinyMCEPopup.dom.getAttrib(tabElm, "aria-controls");

MCTabs.prototype.displayTab = function (tab_id, panel_id, avoid_focus) {

  var panelElm, panelContainerElm, tabElm, tabContainerElm, selectionClass, nodes, i, t = this;

  tabElm = document.getElementById(tab_id);

  if (panel_id === undefined) {

    panel_id = t.getPanelForTab(tabElm);

  }

  panelElm = document.getElementById(panel_id);

  panelContainerElm = panelElm ? panelElm.parentNode : null;

  tabContainerElm = tabElm ? tabElm.parentNode : null;

  selectionClass = t.getParam('selection_class', 'current');

  if (tabElm && tabContainerElm) {

    nodes = tabContainerElm.childNodes;

    // Hide all other tabs

    for (i = 0; i < nodes.length; i++) {

      if (nodes[i].nodeName == "LI") {

        t.hideTab(nodes[i]);

      }

    }

    // Show selected tab

    t.showTab(tabElm);

  }

  if (panelElm && panelContainerElm) {

    nodes = panelContainerElm.childNodes;

    // Hide all other panels

    for (i = 0; i < nodes.length; i++) {

      if (nodes[i].nodeName == "DIV") {

        t.hidePanel(nodes[i]);

      }

    }

    if (!avoid_focus) {

      tabElm.focus();

    }

    // Show selected panel

    t.showPanel(panelElm);

  }

MCTabs.prototype.getAnchor = function () {

  var pos, url = document.location.href;

  if ((pos = url.lastIndexOf('#')) != -1) {

    return url.substring(pos + 1);

  }

  return "";

tinyMCEPopup.onInit.add(function () {

  var tinymce = tinyMCEPopup.getWin().tinymce, dom = tinyMCEPopup.dom, each = tinymce.each;

  each(dom.select('div.tabs'), function (tabContainerElm) {

    //var keyNav;

    dom.setAttrib(tabContainerElm, "role", "tablist");

    var items = tinyMCEPopup.dom.select('li', tabContainerElm);

    var action = function (id) {

      mcTabs.displayTab(id, mcTabs.getPanelForTab(id));

      mcTabs.onChange.dispatch(id);

    };

    each(items, function (item) {

      dom.setAttrib(item, 'role', 'tab');

      dom.bind(item, 'click', function (evt) {

        action(item.id);

      });

    });

    dom.bind(dom.getRoot(), 'keydown', function (evt) {

      if (evt.keyCode === 9 && evt.ctrlKey && !evt.altKey) { // Tab

        //keyNav.moveFocus(evt.shiftKey ? -1 : 1);

        tinymce.dom.Event.cancel(evt);

      }

    });

    each(dom.select('a', tabContainerElm), function (a) {

      dom.setAttrib(a, 'tabindex', '-1');

    });

    /*keyNav = tinyMCEPopup.editor.windowManager.createInstance('tinymce.ui.KeyboardNavigation', {

      root: tabContainerElm,

      items: items,

      onAction: action,

      actOnFocus: true,

      enableLeftRight: true,

      enableUpDown: true

    }, tinyMCEPopup.dom);*/

  }

);