766 lines
25 KiB
JavaScript
766 lines
25 KiB
JavaScript
/*
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Copyright (c) 2009, Yahoo! Inc. All rights reserved.
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Code licensed under the BSD License:
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http://developer.yahoo.net/yui/license.txt
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version: 3.0.0
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build: 1549
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*/
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YUI.add('base-base', function(Y) {
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/**
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* The base module provides the Base class, which objects requiring attribute and custom event support can extend.
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* The module also provides two ways to reuse code - An augmentable Plugin.Host interface which provides plugin support
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* (which is augmented to the Base class) and Base.build which provides a way to
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* build custom classes using extensions.
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*
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* @module base
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*/
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/**
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* The base-base submodule provides the Base class without the Plugin support, provided by Plugin.Host,
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* and without the extension support provided by Base.build.
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*
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* @module base
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* @submodule base-base
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*/
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var O = Y.Object,
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L = Y.Lang,
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DOT = ".",
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DESTROY = "destroy",
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INIT = "init",
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INITIALIZED = "initialized",
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DESTROYED = "destroyed",
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INITIALIZER = "initializer",
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OBJECT_CONSTRUCTOR = Object.prototype.constructor,
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DEEP = "deep",
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SHALLOW = "shallow",
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DESTRUCTOR = "destructor",
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Attribute = Y.Attribute;
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/**
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* <p>
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* A base class which objects requiring attributes and custom event support can
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* extend. Base also handles the chaining of initializer and destructor methods across
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* the hierarchy as part of object construction and destruction. Additionally, attributes configured
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* through the static <a href="#property_Base.ATTRS">ATTRS</a> property for each class
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* in the hierarchy will be initialized by Base.
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* </p>
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*
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* <p>
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* The static <a href="#property_Base.NAME">NAME</a> property of each class extending
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* from Base will be used as the identifier for the class, and is used by Base to prefix
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* all events fired by instances of that class.
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* </p>
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* @class Base
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* @constructor
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* @uses Attribute
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* @uses Plugin.Host
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*
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* @param {Object} config Object with configuration property name/value pairs
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*/
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function Base() {
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Attribute.call(this);
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// If Plugin.Host has been augmented [ through base-pluginhost ], setup it's
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// initial state, but don't initialize Plugins yet. That's done after initialization.
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var PluginHost = Y.Plugin && Y.Plugin.Host;
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if (this._initPlugins && PluginHost) {
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PluginHost.call(this);
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}
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if (this._lazyAddAttrs !== false) { this._lazyAddAttrs = true; }
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this.init.apply(this, arguments);
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}
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/**
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* The list of properties which can be configured for
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* each attribute (e.g. setter, getter, writeOnce, readOnly etc.)
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*
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* @property Base._ATTR_CFG
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* @type Array
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* @static
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* @private
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*/
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Base._ATTR_CFG = Attribute._ATTR_CFG.concat("cloneDefaultValue");
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/**
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* <p>
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* The string to be used to identify instances of
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* this class, for example in prefixing events.
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* </p>
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* <p>
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* Classes extending Base, should define their own
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* static NAME property, which should be camelCase by
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* convention (e.g. MyClass.NAME = "myClass";).
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* </p>
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* @property Base.NAME
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* @type String
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* @static
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*/
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Base.NAME = "base";
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/**
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* The default set of attributes which will be available for instances of this class, and
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* their configuration. In addition to the configuration properties listed by
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* Attribute's <a href="Attribute.html#method_addAttr">addAttr</a> method, the attribute
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* can also be configured with a "cloneDefaultValue" property, which defines how the statically
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* defined value field should be protected ("shallow", "deep" and false are supported values).
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*
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* By default if the value is an object literal or an array it will be "shallow" cloned, to
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* protect the default value.
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*
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* @property Base.ATTRS
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* @type Object
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* @static
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*/
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Base.ATTRS = {
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/**
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* Flag indicating whether or not this object
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* has been through the init lifecycle phase.
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*
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* @attribute initialized
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* @readonly
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* @default false
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* @type boolean
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*/
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initialized: {
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readOnly:true,
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value:false
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},
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/**
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* Flag indicating whether or not this object
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* has been through the destroy lifecycle phase.
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*
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* @attribute destroyed
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* @readonly
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* @default false
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* @type boolean
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*/
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destroyed: {
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readOnly:true,
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value:false
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}
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};
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Base.prototype = {
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/**
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* Init lifecycle method, invoked during construction.
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* Fires the init event prior to setting up attributes and
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* invoking initializers for the class hierarchy.
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*
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* @method init
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* @final
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* @chainable
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* @param {Object} config Object with configuration property name/value pairs
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* @return {Base} A reference to this object
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*/
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init: function(config) {
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/**
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* The string used to identify the class of this object.
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*
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* @deprecated Use this.constructor.NAME
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* @property name
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* @type String
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*/
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this._yuievt.config.prefix = this.name = this.constructor.NAME;
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/**
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* <p>
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* Lifecycle event for the init phase, fired prior to initialization.
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* Invoking the preventDefault() method on the event object provided
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* to subscribers will prevent initialization from occuring.
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* </p>
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* <p>
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* Subscribers to the "after" momemt of this event, will be notified
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* after initialization of the object is complete (and therefore
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* cannot prevent initialization).
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* </p>
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*
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* @event init
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* @preventable _defInitFn
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* @param {EventFacade} e Event object, with a cfg property which
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* refers to the configuration object passed to the constructor.
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*/
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this.publish(INIT, {
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queuable:false,
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defaultFn:this._defInitFn
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});
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if (config) {
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if (config.on) {
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this.on(config.on);
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}
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if (config.after) {
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this.after(config.after);
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}
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}
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this.fire(INIT, {cfg: config});
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return this;
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},
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/**
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* <p>
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* Destroy lifecycle method. Fires the destroy
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* event, prior to invoking destructors for the
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* class hierarchy.
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* </p>
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* <p>
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* Subscribers to the destroy
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* event can invoke preventDefault on the event object, to prevent destruction
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* from proceeding.
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* </p>
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* @method destroy
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* @return {Base} A reference to this object
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* @final
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* @chainable
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*/
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destroy: function() {
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/**
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* <p>
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* Lifecycle event for the destroy phase,
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* fired prior to destruction. Invoking the preventDefault
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* method on the event object provided to subscribers will
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* prevent destruction from proceeding.
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* </p>
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* <p>
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* Subscribers to the "after" moment of this event, will be notified
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* after destruction is complete (and as a result cannot prevent
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* destruction).
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* </p>
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* @event destroy
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* @preventable _defDestroyFn
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* @param {EventFacade} e Event object
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*/
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this.publish(DESTROY, {
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queuable:false,
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defaultFn: this._defDestroyFn
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});
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this.fire(DESTROY);
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return this;
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},
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/**
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* Default init event handler
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*
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* @method _defInitFn
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* @param {EventFacade} e Event object, with a cfg property which
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* refers to the configuration object passed to the constructor.
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* @protected
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*/
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_defInitFn : function(e) {
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this._initHierarchy(e.cfg);
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if (this._initPlugins) {
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// Need to initPlugins manually, to handle constructor parsing, static Plug parsing
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this._initPlugins(e.cfg);
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}
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this._set(INITIALIZED, true);
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},
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/**
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* Default destroy event handler
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*
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* @method _defDestroyFn
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* @param {EventFacade} e Event object
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* @protected
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*/
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_defDestroyFn : function(e) {
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this._destroyHierarchy();
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if (this._destroyPlugins) {
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this._destroyPlugins();
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}
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this._set(DESTROYED, true);
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},
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/**
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* Returns the class hierarchy for this object, with Base being the last class in the array.
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*
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* @method _getClasses
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* @protected
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* @return {Function[]} An array of classes (constructor functions), making up the class hierarchy for this object.
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* This value is cached the first time the method, or _getAttrCfgs, is invoked. Subsequent invocations return the
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* cached value.
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*/
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_getClasses : function() {
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if (!this._classes) {
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this._initHierarchyData();
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}
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return this._classes;
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},
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/**
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* Returns an aggregated set of attribute configurations, by traversing the class hierarchy.
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*
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* @method _getAttrCfgs
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* @protected
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* @return {Object} The hash of attribute configurations, aggregated across classes in the hierarchy
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* This value is cached the first time the method, or _getClasses, is invoked. Subsequent invocations return
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* the cached value.
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*/
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_getAttrCfgs : function() {
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if (!this._attrs) {
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this._initHierarchyData();
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}
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return this._attrs;
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},
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/**
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* A helper method used when processing ATTRS across the class hierarchy during
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* initialization. Returns a disposable object with the attributes defined for
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* the provided class, extracted from the set of all attributes passed in .
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*
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* @method _filterAttrCfs
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* @private
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*
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* @param {Function} clazz The class for which the desired attributes are required.
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* @param {Object} allCfgs The set of all attribute configurations for this instance.
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* Attributes will be removed from this set, if they belong to the filtered class, so
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* that by the time all classes are processed, allCfgs will be empty.
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*
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* @return {Object} The set of attributes belonging to the class passed in, in the form
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* of an object with attribute name/configuration pairs.
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*/
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_filterAttrCfgs : function(clazz, allCfgs) {
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var cfgs = null, attr, attrs = clazz.ATTRS;
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if (attrs) {
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for (attr in attrs) {
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if (attrs.hasOwnProperty(attr) && allCfgs[attr]) {
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cfgs = cfgs || {};
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cfgs[attr] = allCfgs[attr];
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delete allCfgs[attr];
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}
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}
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}
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return cfgs;
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},
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/**
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* A helper method used by _getClasses and _getAttrCfgs, which determines both
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* the array of classes and aggregate set of attribute configurations
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* across the class hierarchy for the instance.
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*
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* @method _initHierarchyData
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* @private
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*/
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_initHierarchyData : function() {
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var c = this.constructor,
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classes = [],
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attrs = [];
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while (c) {
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// Add to classes
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classes[classes.length] = c;
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// Add to attributes
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if (c.ATTRS) {
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attrs[attrs.length] = c.ATTRS;
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}
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c = c.superclass ? c.superclass.constructor : null;
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}
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this._classes = classes;
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this._attrs = this._aggregateAttrs(attrs);
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},
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/**
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* A helper method, used by _initHierarchyData to aggregate
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* attribute configuration across the instances class hierarchy.
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*
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* The method will potect the attribute configuration value to protect the statically defined
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* default value in ATTRS if required (if the value is an object literal, array or the
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* attribute configuration has cloneDefaultValue set to shallow or deep).
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*
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* @method _aggregateAttrs
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* @private
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* @param {Array} allAttrs An array of ATTRS definitions across classes in the hierarchy
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* (subclass first, Base last)
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* @return {Object} The aggregate set of ATTRS definitions for the instance
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*/
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_aggregateAttrs : function(allAttrs) {
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var attr,
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attrs,
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cfg,
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val,
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path,
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i,
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clone,
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cfgProps = Base._ATTR_CFG,
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aggAttrs = {};
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if (allAttrs) {
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for (i = allAttrs.length-1; i >= 0; --i) {
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attrs = allAttrs[i];
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for (attr in attrs) {
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if (attrs.hasOwnProperty(attr)) {
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// Protect config passed in
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cfg = Y.mix({}, attrs[attr], true, cfgProps);
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val = cfg.value;
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clone = cfg.cloneDefaultValue;
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if (val) {
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if ( (clone === undefined && (OBJECT_CONSTRUCTOR === val.constructor || L.isArray(val))) || clone === DEEP || clone === true) {
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cfg.value = Y.clone(val);
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} else if (clone === SHALLOW) {
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cfg.value = Y.merge(val);
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}
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// else if (clone === false), don't clone the static default value.
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// It's intended to be used by reference.
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}
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path = null;
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if (attr.indexOf(DOT) !== -1) {
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path = attr.split(DOT);
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attr = path.shift();
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}
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if (path && aggAttrs[attr] && aggAttrs[attr].value) {
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O.setValue(aggAttrs[attr].value, path, val);
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} else if (!path){
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if (!aggAttrs[attr]) {
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aggAttrs[attr] = cfg;
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} else {
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Y.mix(aggAttrs[attr], cfg, true, cfgProps);
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}
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}
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}
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}
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}
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}
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return aggAttrs;
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},
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/**
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* Initializes the class hierarchy for the instance, which includes
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* initializing attributes for each class defined in the class's
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* static <a href="#property_Base.ATTRS">ATTRS</a> property and
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* invoking the initializer method on the prototype of each class in the hierarchy.
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*
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* @method _initHierarchy
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* @param {Object} userVals Object with configuration property name/value pairs
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* @private
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*/
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_initHierarchy : function(userVals) {
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var lazy = this._lazyAddAttrs,
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constr,
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constrProto,
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ci,
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ei,
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el,
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classes = this._getClasses(),
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attrCfgs = this._getAttrCfgs();
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for (ci = classes.length-1; ci >= 0; ci--) {
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constr = classes[ci];
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constrProto = constr.prototype;
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if (constr._yuibuild && constr._yuibuild.exts && !constr._yuibuild.dynamic) {
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for (ei = 0, el = constr._yuibuild.exts.length; ei < el; ei++) {
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constr._yuibuild.exts[ei].apply(this, arguments);
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}
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}
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this.addAttrs(this._filterAttrCfgs(constr, attrCfgs), userVals, lazy);
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if (constrProto.hasOwnProperty(INITIALIZER)) {
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constrProto.initializer.apply(this, arguments);
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}
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}
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},
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/**
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* Destroys the class hierarchy for this instance by invoking
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* the descructor method on the prototype of each class in the hierarchy.
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*
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* @method _destroyHierarchy
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* @private
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*/
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_destroyHierarchy : function() {
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var constr,
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constrProto,
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ci, cl,
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classes = this._getClasses();
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for (ci = 0, cl = classes.length; ci < cl; ci++) {
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constr = classes[ci];
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constrProto = constr.prototype;
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if (constrProto.hasOwnProperty(DESTRUCTOR)) {
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constrProto.destructor.apply(this, arguments);
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}
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}
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},
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|
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/**
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* Default toString implementation. Provides the constructor NAME
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* and the instance ID.
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*
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* @method toString
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* @return {String} String representation for this object
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*/
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toString: function() {
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return this.constructor.NAME + "[" + Y.stamp(this) + "]";
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}
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};
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|
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// Straightup augment, no wrapper functions
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Y.mix(Base, Attribute, false, null, 1);
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|
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// Fix constructor
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Base.prototype.constructor = Base;
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Y.Base = Base;
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|
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// Fix constructor
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Base.prototype.constructor = Base;
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|
|
|
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}, '3.0.0' ,{requires:['attribute-base']});
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YUI.add('base-pluginhost', function(Y) {
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|
|
/**
|
|
* The base-pluginhost submodule adds Plugin support to Base, by augmenting Base with
|
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* Plugin.Host and setting up static (class level) Base.plug and Base.unplug methods.
|
|
*
|
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* @module base
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* @submodule base-pluginhost
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* @for Base
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*/
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var Base = Y.Base,
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PluginHost = Y.Plugin.Host;
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Y.mix(Base, PluginHost, false, null, 1);
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|
|
/**
|
|
* Alias for <a href="Plugin.Host.html#method_Plugin.Host.plug">Plugin.Host.plug</a>. See aliased
|
|
* method for argument and return value details.
|
|
*
|
|
* @method Base.plug
|
|
* @static
|
|
*/
|
|
Base.plug = PluginHost.plug;
|
|
|
|
/**
|
|
* Alias for <a href="Plugin.Host.html#method_Plugin.Host.unplug">Plugin.Host.unplug</a>. See the
|
|
* aliased method for argument and return value details.
|
|
*
|
|
* @method Base.unplug
|
|
* @static
|
|
*/
|
|
Base.unplug = PluginHost.unplug;
|
|
|
|
|
|
}, '3.0.0' ,{requires:['base-base', 'pluginhost']});
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YUI.add('base-build', function(Y) {
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/**
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* The base-build submodule provides Base.build functionality, which
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* can be used to create custom classes, by aggregating extensions onto
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* a main class.
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*
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* @module base
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* @submodule base-build
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* @for Base
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*/
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var Base = Y.Base,
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L = Y.Lang;
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/**
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* The build configuration for the Base class.
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*
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* Defines the static fields which need to be aggregated
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* when the Base class is used as the main class passed to
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* the <a href="#method_Base.build">Base.build</a> method.
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*
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* @property Base._buildCfg
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* @type Object
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* @static
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* @final
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* @private
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*/
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Base._buildCfg = {
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aggregates : ["ATTRS", "_PLUG", "_UNPLUG"]
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};
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/**
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* <p>
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* Builds a custom constructor function (class) from the
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* main function, and array of extension functions (classes)
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* provided. The NAME field for the constructor function is
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* defined by the first argument passed in.
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* </p>
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* <p>
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* The cfg object supports the following properties
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* </p>
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* <dl>
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* <dt>dynamic <boolean></dt>
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* <dd>
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* <p>If true (default), a completely new class
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* is created which extends the main class, and acts as the
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* host on which the extension classes are augmented.</p>
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* <p>If false, the extensions classes are augmented directly to
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* the main class, modifying the main class' prototype.</p>
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* </dd>
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* <dt>aggregates <String[]></dt>
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* <dd>An array of static property names, which will get aggregated
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* on to the built class, in addition to the default properties build
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* will always aggregate as defined by the main class' static _buildCfg
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* property.
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* </dd>
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* </dl>
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*
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* @method Base.build
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* @static
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* @param {Function} name The name of the new class. Used to defined the NAME property for the new class.
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* @param {Function} main The main class on which to base the built class
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* @param {Function[]} extensions The set of extension classes which will be
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* augmented/aggregated to the built class.
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* @param {Object} cfg Optional. Build configuration for the class (see description).
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* @return {Function} A custom class, created from the provided main and extension classes
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*/
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Base.build = function(name, main, extensions, cfg) {
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var build = Base.build,
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builtClass = build._getClass(main, cfg),
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aggregates = build._getAggregates(main, cfg),
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dynamic = builtClass._yuibuild.dynamic,
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i, l, val, extClass;
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// Shallow isolate aggregates
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if (dynamic) {
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if (aggregates) {
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for (i = 0, l = aggregates.length; i < l; ++i) {
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val = aggregates[i];
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if (main.hasOwnProperty(val)) {
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builtClass[val] = L.isArray(main[val]) ? [] : {};
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}
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}
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Y.aggregate(builtClass, main, true, aggregates);
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}
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}
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// Augment/Aggregate
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for (i = 0, l = extensions.length; i < l; i++) {
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extClass = extensions[i];
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if (aggregates) {
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Y.aggregate(builtClass, extClass, true, aggregates);
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}
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// Old augment
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Y.mix(builtClass, extClass, true, null, 1);
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builtClass._yuibuild.exts.push(extClass);
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}
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builtClass.prototype.hasImpl = build._hasImpl;
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if (dynamic) {
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builtClass.NAME = name;
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builtClass.prototype.constructor = builtClass;
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}
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return builtClass;
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};
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Y.mix(Base.build, {
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_template: function(main) {
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function BuiltClass() {
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BuiltClass.superclass.constructor.apply(this, arguments);
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var f = BuiltClass._yuibuild.exts,
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l = f.length,
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i;
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for (i = 0; i < l; i++) {
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f[i].apply(this, arguments);
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}
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return this;
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}
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Y.extend(BuiltClass, main);
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return BuiltClass;
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},
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_hasImpl : function(extClass) {
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var classes = this._getClasses();
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for (var i = 0, l = classes.length; i < l; i++) {
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var cls = classes[i];
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if (cls._yuibuild) {
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var exts = cls._yuibuild.exts,
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ll = exts.length,
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j;
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for (j = 0; j < ll; j++) {
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if (exts[j] === extClass) {
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return true;
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}
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}
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}
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}
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return false;
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},
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_getClass : function(main, cfg) {
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var dynamic = (cfg && false === cfg.dynamic) ? false : true,
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builtClass = (dynamic) ? Base.build._template(main) : main;
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builtClass._yuibuild = {
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id: null,
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exts : [],
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dynamic : dynamic
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};
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return builtClass;
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},
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_getAggregates : function(main, cfg) {
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var aggr = [],
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cfgAggr = (cfg && cfg.aggregates),
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c = main,
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classAggr;
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while (c && c.prototype) {
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classAggr = c._buildCfg && c._buildCfg.aggregates;
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if (classAggr) {
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aggr = aggr.concat(classAggr);
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}
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c = c.superclass ? c.superclass.constructor : null;
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}
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if (cfgAggr) {
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aggr = aggr.concat(cfgAggr);
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}
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return aggr;
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}
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});
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}, '3.0.0' ,{requires:['base-base']});
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YUI.add('base', function(Y){}, '3.0.0' ,{use:['base-base', 'base-pluginhost', 'base-build']});
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