(function() {
/**
* The tabview module provides a widget for managing content bound to tabs.
* @module tabview
* @requires yahoo, dom, event, element
*
*/
/**
* A widget to control tabbed views.
* @namespace YAHOO.widget
* @class TabView
* @extends YAHOO.util.Element
* @constructor
* @param {HTMLElement | String | Object} el(optional) The html
* element that represents the TabView, or the attribute object to use.
* An element will be created if none provided.
* @param {Object} attr (optional) A key map of the tabView's
* initial attributes. Ignored if first arg is attributes object.
*/
YAHOO.widget.TabView = function(el, attr) {
attr = attr || {};
if (arguments.length == 1 && !YAHOO.lang.isString(el) && !el.nodeName) {
attr = el; // treat first arg as attr object
el = attr.element || null;
}
if (!el && !attr.element) { // create if we dont have one
el = _createTabViewElement.call(this, attr);
}
YAHOO.widget.TabView.superclass.constructor.call(this, el, attr);
};
YAHOO.extend(YAHOO.widget.TabView, YAHOO.util.Element);
var proto = YAHOO.widget.TabView.prototype;
var Dom = YAHOO.util.Dom;
var Event = YAHOO.util.Event;
var Tab = YAHOO.widget.Tab;
/**
* The className to add when building from scratch.
* @property CLASSNAME
* @default "navset"
*/
proto.CLASSNAME = 'yui-navset';
/**
* The className of the HTMLElement containing the TabView's tab elements
* to look for when building from existing markup, or to add when building
* from scratch.
* All childNodes of the tab container are treated as Tabs when building
* from existing markup.
* @property TAB_PARENT_CLASSNAME
* @default "nav"
*/
proto.TAB_PARENT_CLASSNAME = 'yui-nav';
/**
* The className of the HTMLElement containing the TabView's label elements
* to look for when building from existing markup, or to add when building
* from scratch.
* All childNodes of the content container are treated as content elements when
* building from existing markup.
* @property CONTENT_PARENT_CLASSNAME
* @default "nav-content"
*/
proto.CONTENT_PARENT_CLASSNAME = 'yui-content';
proto._tabParent = null;
proto._contentParent = null;
/**
* Adds a Tab to the TabView instance.
* If no index is specified, the tab is added to the end of the tab list.
* @method addTab
* @param {YAHOO.widget.Tab} tab A Tab instance to add.
* @param {Integer} index The position to add the tab.
* @return void
*/
proto.addTab = function(tab, index) {
var tabs = this.get('tabs');
if (!tabs) { // not ready yet
this._queue[this._queue.length] = ['addTab', arguments];
return false;
}
index = (index === undefined) ? tabs.length : index;
var before = this.getTab(index);
var self = this;
var el = this.get('element');
var tabParent = this._tabParent;
var contentParent = this._contentParent;
var tabElement = tab.get('element');
var contentEl = tab.get('contentEl');
if ( before ) {
tabParent.insertBefore(tabElement, before.get('element'));
} else {
tabParent.appendChild(tabElement);
}
if ( contentEl && !Dom.isAncestor(contentParent, contentEl) ) {
contentParent.appendChild(contentEl);
}
if ( !tab.get('active') ) {
tab.set('contentVisible', false, true); /* hide if not active */
} else {
this.set('activeTab', tab, true);
}
var activate = function(e) {
YAHOO.util.Event.preventDefault(e);
var silent = false;
if (this == self.get('activeTab')) {
silent = true; // dont fire activeTabChange if already active
}
self.set('activeTab', this, silent);
};
tab.addListener( tab.get('activationEvent'), activate);
tab.addListener('activationEventChange', function(e) {
if (e.prevValue != e.newValue) {
tab.removeListener(e.prevValue, activate);
tab.addListener(e.newValue, activate);
}
});
tabs.splice(index, 0, tab);
};
/**
* Routes childNode events.
* @method DOMEventHandler
* @param {event} e The Dom event that is being handled.
* @return void
*/
proto.DOMEventHandler = function(e) {
var el = this.get('element');
var target = YAHOO.util.Event.getTarget(e);
var tabParent = this._tabParent;
if (Dom.isAncestor(tabParent, target) ) {
var tabEl;
var tab = null;
var contentEl;
var tabs = this.get('tabs');
for (var i = 0, len = tabs.length; i < len; i++) {
tabEl = tabs[i].get('element');
contentEl = tabs[i].get('contentEl');
if ( target == tabEl || Dom.isAncestor(tabEl, target) ) {
tab = tabs[i];
break; // note break
}
}
if (tab) {
tab.fireEvent(e.type, e);
}
}
};
/**
* Returns the Tab instance at the specified index.
* @method getTab
* @param {Integer} index The position of the Tab.
* @return YAHOO.widget.Tab
*/
proto.getTab = function(index) {
return this.get('tabs')[index];
};
/**
* Returns the index of given tab.
* @method getTabIndex
* @param {YAHOO.widget.Tab} tab The tab whose index will be returned.
* @return int
*/
proto.getTabIndex = function(tab) {
var index = null;
var tabs = this.get('tabs');
for (var i = 0, len = tabs.length; i < len; ++i) {
if (tab == tabs[i]) {
index = i;
break;
}
}
return index;
};
/**
* Removes the specified Tab from the TabView.
* @method removeTab
* @param {YAHOO.widget.Tab} item The Tab instance to be removed.
* @return void
*/
proto.removeTab = function(tab) {
var tabCount = this.get('tabs').length;
var index = this.getTabIndex(tab);
var nextIndex = index + 1;
if ( tab == this.get('activeTab') ) { // select next tab
if (tabCount > 1) {
if (index + 1 == tabCount) {
this.set('activeIndex', index - 1);
} else {
this.set('activeIndex', index + 1);
}
}
}
this._tabParent.removeChild( tab.get('element') );
this._contentParent.removeChild( tab.get('contentEl') );
this._configs.tabs.value.splice(index, 1);
};
/**
* Provides a readable name for the TabView instance.
* @method toString
* @return String
*/
proto.toString = function() {
var name = this.get('id') || this.get('tagName');
return "TabView " + name;
};
/**
* The transiton to use when switching between tabs.
* @method contentTransition
*/
proto.contentTransition = function(newTab, oldTab) {
newTab.set('contentVisible', true);
oldTab.set('contentVisible', false);
};
/**
* setAttributeConfigs TabView specific properties.
* @method initAttributes
* @param {Object} attr Hash of initial attributes
*/
proto.initAttributes = function(attr) {
YAHOO.widget.TabView.superclass.initAttributes.call(this, attr);
if (!attr.orientation) {
attr.orientation = 'top';
}
var el = this.get('element');
if (!YAHOO.util.Dom.hasClass(el, this.CLASSNAME)) {
YAHOO.util.Dom.addClass(el, this.CLASSNAME);
}
/**
* The Tabs belonging to the TabView instance.
* @attribute tabs
* @type Array
*/
this.setAttributeConfig('tabs', {
value: [],
readOnly: true
});
/**
* The container of the tabView's label elements.
* @property _tabParent
* @private
* @type HTMLElement
*/
this._tabParent =
this.getElementsByClassName(this.TAB_PARENT_CLASSNAME,
'ul' )[0] || _createTabParent.call(this);
/**
* The container of the tabView's content elements.
* @property _contentParent
* @type HTMLElement
* @private
*/
this._contentParent =
this.getElementsByClassName(this.CONTENT_PARENT_CLASSNAME,
'div')[0] || _createContentParent.call(this);
/**
* How the Tabs should be oriented relative to the TabView.
* @attribute orientation
* @type String
* @default "top"
*/
this.setAttributeConfig('orientation', {
value: attr.orientation,
method: function(value) {
var current = this.get('orientation');
this.addClass('yui-navset-' + value);
if (current != value) {
this.removeClass('yui-navset-' + current);
}
switch(value) {
case 'bottom':
this.appendChild(this._tabParent);
break;
}
}
});
/**
* The index of the tab currently active.
* @attribute activeIndex
* @type Int
*/
this.setAttributeConfig('activeIndex', {
value: attr.activeIndex,
method: function(value) {
this.set('activeTab', this.getTab(value));
},
validator: function(value) {
return !this.getTab(value).get('disabled'); // cannot activate if disabled
}
});
/**
* The tab currently active.
* @attribute activeTab
* @type YAHOO.widget.Tab
*/
this.setAttributeConfig('activeTab', {
value: attr.activeTab,
method: function(tab) {
var activeTab = this.get('activeTab');
if (tab) {
tab.set('active', true);
this._configs['activeIndex'].value = this.getTabIndex(tab); // keep in sync
}
if (activeTab && activeTab != tab) {
activeTab.set('active', false);
}
if (activeTab && tab != activeTab) { // no transition if only 1
this.contentTransition(tab, activeTab);
} else if (tab) {
tab.set('contentVisible', true);
}
},
validator: function(value) {
return !value.get('disabled'); // cannot activate if disabled
}
});
YAHOO.log('attributes initialized', 'info', 'TabView');
if ( this._tabParent ) {
_initTabs.call(this);
}
// Due to delegation we add all DOM_EVENTS to the TabView container
// but IE will leak when unsupported events are added, so remove these
this.DOM_EVENTS.submit = false;
this.DOM_EVENTS.focus = false;
this.DOM_EVENTS.blur = false;
for (var type in this.DOM_EVENTS) {
if ( YAHOO.lang.hasOwnProperty(this.DOM_EVENTS, type) ) {
this.addListener.call(this, type, this.DOMEventHandler);
}
}
};
/**
* Creates Tab instances from a collection of HTMLElements.
* @method initTabs
* @private
* @return void
*/
var _initTabs = function() {
var tab,
attr,
contentEl;
var el = this.get('element');
var tabs = _getChildNodes(this._tabParent);
var contentElements = _getChildNodes(this._contentParent);
for (var i = 0, len = tabs.length; i < len; ++i) {
attr = {};
if (contentElements[i]) {
attr.contentEl = contentElements[i];
}
tab = new YAHOO.widget.Tab(tabs[i], attr);
this.addTab(tab);
if (tab.hasClass(tab.ACTIVE_CLASSNAME) ) {
this._configs.activeTab.value = tab; // dont invoke method
this._configs.activeIndex.value = this.getTabIndex(tab);
}
}
};
var _createTabViewElement = function(attr) {
var el = document.createElement('div');
if ( this.CLASSNAME ) {
el.className = this.CLASSNAME;
}
YAHOO.log('TabView Dom created', 'info', 'TabView');
return el;
};
var _createTabParent = function(attr) {
var el = document.createElement('ul');
if ( this.TAB_PARENT_CLASSNAME ) {
el.className = this.TAB_PARENT_CLASSNAME;
}
this.get('element').appendChild(el);
return el;
};
var _createContentParent = function(attr) {
var el = document.createElement('div');
if ( this.CONTENT_PARENT_CLASSNAME ) {
el.className = this.CONTENT_PARENT_CLASSNAME;
}
this.get('element').appendChild(el);
return el;
};
var _getChildNodes = function(el) {
var nodes = [];
var childNodes = el.childNodes;
for (var i = 0, len = childNodes.length; i < len; ++i) {
if (childNodes[i].nodeType == 1) {
nodes[nodes.length] = childNodes[i];
}
}
return nodes;
};
})();