/**

 * 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);

	});

});