(function() {
/**
* The tabview module provides a widget for managing content bound to tabs.
* @module tabview
* @requires yahoo, dom, event, element
*
*/
var Y = YAHOO.util,
Dom = Y.Dom,
Event = Y.Event,
document = window.document,
// STRING CONSTANTS
ACTIVE = 'active',
ACTIVE_INDEX = 'activeIndex',
ACTIVE_TAB = 'activeTab',
CONTENT_EL = 'contentEl',
ELEMENT = '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.
*/
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 = this._createTabViewElement(attr);
}
TabView.superclass.constructor.call(this, el, attr);
};
YAHOO.extend(TabView, Y.Element, {
/**
* The className to add when building from scratch.
* @property CLASSNAME
* @default "navset"
*/
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"
*/
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"
*/
CONTENT_PARENT_CLASSNAME: 'yui-content',
_tabParent: null,
_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
*/
addTab: function(tab, index) {
var tabs = this.get('tabs'),
before = this.getTab(index),
tabParent = this._tabParent,
contentParent = this._contentParent,
tabElement = tab.get(ELEMENT),
contentEl = tab.get(CONTENT_EL);
if (!tabs) { // not ready yet
this._queue[this._queue.length] = ['addTab', arguments];
return false;
}
index = (index === undefined) ? tabs.length : index;
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(ACTIVE_TAB, tab, true);
}
this._initTabEvents(tab);
tabs.splice(index, 0, tab);
},
_initTabEvents: function(tab) {
tab.addListener( tab.get('activationEvent'), tab._onActivate, this, tab);
tab.addListener('activationEventChange', function(e) {
if (e.prevValue != e.newValue) {
tab.removeListener(e.prevValue, tab._onActivate);
tab.addListener(e.newValue, tab._onActivate, this, tab);
}
});
},
/**
* Routes childNode events.
* @method DOMEventHandler
* @param {event} e The Dom event that is being handled.
* @return void
*/
DOMEventHandler: function(e) {
var target = Event.getTarget(e),
tabParent = this._tabParent,
tabs = this.get('tabs'),
tab,
tabEl,
contentEl;
if (Dom.isAncestor(tabParent, target) ) {
for (var i = 0, len = tabs.length; i < len; i++) {
tabEl = tabs[i].get(ELEMENT);
contentEl = tabs[i].get(CONTENT_EL);
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
*/
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
*/
getTabIndex: function(tab) {
var index = null,
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
*/
removeTab: function(tab) {
var tabCount = this.get('tabs').length,
index = this.getTabIndex(tab);
if ( tab === this.get(ACTIVE_TAB) ) {
if (tabCount > 1) { // select another tab
if (index + 1 === tabCount) { // if last, activate previous
this.set(ACTIVE_INDEX, index - 1);
} else { // activate next tab
this.set(ACTIVE_INDEX, index + 1);
}
} else { // no more tabs
this.set(ACTIVE_TAB, null);
}
}
this._tabParent.removeChild( tab.get(ELEMENT) );
this._contentParent.removeChild( tab.get(CONTENT_EL) );
this._configs.tabs.value.splice(index, 1);
tab.fireEvent('remove', { type: 'remove', tabview: this });
},
/**
* Provides a readable name for the TabView instance.
* @method toString
* @return String
*/
toString: function() {
var name = this.get('id') || this.get('tagName');
return "TabView " + name;
},
/**
* The transiton to use when switching between tabs.
* @method contentTransition
*/
contentTransition: function(newTab, oldTab) {
if (newTab) {
newTab.set('contentVisible', true);
}
if (oldTab) {
oldTab.set('contentVisible', false);
}
},
/**
* setAttributeConfigs TabView specific properties.
* @method initAttributes
* @param {Object} attr Hash of initial attributes
*/
initAttributes: function(attr) {
TabView.superclass.initAttributes.call(this, attr);
if (!attr.orientation) {
attr.orientation = 'top';
}
var el = this.get(ELEMENT);
if (!Dom.hasClass(el, this.CLASSNAME)) {
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] || this._createTabParent();
/**
* The container of the tabView's content elements.
* @property _contentParent
* @type HTMLElement
* @private
*/
this._contentParent =
this.getElementsByClassName(this.CONTENT_PARENT_CLASSNAME,
'div')[0] || this._createContentParent();
/**
* 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);
}
if (value === 'bottom') {
this.appendChild(this._tabParent);
}
}
});
/**
* The index of the tab currently active.
* @attribute activeIndex
* @type Int
*/
this.setAttributeConfig(ACTIVE_INDEX, {
value: attr.activeIndex,
method: function(value) {
},
validator: function(value) {
var ret = true;
if (value && this.getTab(value).get('disabled')) { // cannot activate if disabled
ret = false;
}
return ret;
}
});
/**
* The tab currently active.
* @attribute activeTab
* @type YAHOO.widget.Tab
*/
this.setAttributeConfig(ACTIVE_TAB, {
value: attr.activeTab,
method: function(tab) {
var activeTab = this.get(ACTIVE_TAB);
if (tab) {
tab.set(ACTIVE, true);
}
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) {
var ret = true;
if (value && value.get('disabled')) { // cannot activate if disabled
ret = false;
}
return ret;
}
});
this.on('activeTabChange', this._onActiveTabChange);
this.on('activeIndexChange', this._onActiveIndexChange);
YAHOO.log('attributes initialized', 'info', 'TabView');
if ( this._tabParent ) {
this._initTabs();
}
// 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);
}
}
},
/**
* Removes selected state from the given tab if it is the activeTab
* @method deselectTab
* @param {Int} index The tab index to deselect
*/
deselectTab: function(index) {
if (this.getTab(index) === this.get('activeTab')) {
this.set('activeTab', null);
}
},
/**
* Makes the tab at the given index the active tab
* @method selectTab
* @param {Int} index The tab index to be made active
*/
selectTab: function(index) {
this.set('activeTab', this.getTab(index));
},
_onActiveTabChange: function(e) {
var activeIndex = this.get(ACTIVE_INDEX),
newIndex = this.getTabIndex(e.newValue);
if (activeIndex !== newIndex) {
if (!(this.set(ACTIVE_INDEX, newIndex)) ) { // NOTE: setting
// revert if activeIndex update fails (cancelled via beforeChange)
this.set(ACTIVE_TAB, e.prevValue);
}
}
},
_onActiveIndexChange: function(e) {
// no set if called from ActiveTabChange event
if (e.newValue !== this.getTabIndex(this.get(ACTIVE_TAB))) {
if (!(this.set(ACTIVE_TAB, this.getTab(e.newValue))) ) { // NOTE: setting
// revert if activeTab update fails (cancelled via beforeChange)
this.set(ACTIVE_INDEX, e.prevValue);
}
}
},
/**
* Creates Tab instances from a collection of HTMLElements.
* @method _initTabs
* @private
* @return void
*/
_initTabs: function() {
var tabs = Dom.getChildren(this._tabParent),
contentElements = Dom.getChildren(this._contentParent),
activeIndex = this.get(ACTIVE_INDEX),
tab,
attr,
active;
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) ) {
active = tab;
}
}
if (activeIndex) {
this.set(ACTIVE_TAB, this.getTab(activeIndex));
} else {
this._configs.activeTab.value = active; // dont invoke method
this._configs.activeIndex.value = this.getTabIndex(active);
}
},
_createTabViewElement: function(attr) {
var el = document.createElement('div');
if ( this.CLASSNAME ) {
el.className = this.CLASSNAME;
}
YAHOO.log('TabView Dom created', 'info', 'TabView');
return el;
},
_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;
},
_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;
}
});
YAHOO.widget.TabView = TabView;
})();