  /**
   * mctabs.js
   *
   * Copyright 2009, Moxiecode Systems AB
   * Released under LGPL License.
   *
   * License: http://tinymce.moxiecode.com/license
   * Contributing: http://tinymce.moxiecode.com/contributing
   */

  function MCTabs() {
      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 "";
  };


//Global instance
  var mcTabs = new MCTabs();

  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);
      });
  });