Extract BaseEvents from Base.

Move the observablility of `Y.Base`'s lifecycle and attribute changes
into `Y.BaseEvents`, an extension for `Y.BaseCore`.

src/base/js/Base.js

@@ -0,0 +1,150 @@
+    /**
+     * The base module provides the Base class, which objects requiring attribute and custom event support can extend.
+     * The module also provides two ways to reuse code - It augments Base with the Plugin.Host interface which provides
+     * plugin support and also provides the BaseCore.build method which provides a way to build custom classes using extensions.
+     *
+     * @module base
+     */
+
+    /**
+     * The base-base submodule provides the Base class without the Plugin support, provided by Plugin.Host,
+     * and without the extension support provided by BaseCore.build.
+     *
+     * @module base
+     * @submodule base-base
+     */
+
+    /**
+     * <p>
+     * A base class which objects requiring attributes and custom event support can
+     * extend. Base also handles the chaining of initializer and destructor methods across
+     * the hierarchy as part of object construction and destruction. Additionally, attributes configured
+     * through the static <a href="#property_ATTRS">ATTRS</a> property for each class
+     * in the hierarchy will be initialized by Base.
+     * </p>
+     *
+     * <p>
+     * The static <a href="#property_NAME">NAME</a> property of each class extending
+     * from Base will be used as the identifier for the class, and is used by Base to prefix
+     * all events fired by instances of that class.
+     * </p>
+     *
+     * @class Base
+     * @constructor
+     * @uses BaseCore
+     * @uses BaseEvents
+     * @uses Attribute
+     * @uses AttributeCore
+     * @uses AttributeEvents
+     * @uses AttributeExtras
+     * @uses EventTarget
+     *
+     * @param {Object} config Object with configuration property name/value pairs. The object can be
+     * used to provide default values for the objects published attributes.
+     *
+     * <p>
+     * The config object can also contain the following non-attribute properties, providing a convenient
+     * way to configure events listeners and plugins for the instance, as part of the constructor call:
+     * </p>
+     *
+     * <dl>
+     *     <dt>on</dt>
+     *     <dd>An event name to listener function map, to register event listeners for the "on" moment of the event. A constructor convenience property for the <a href="Base.html#method_on">on</a> method.</dd>
+     *     <dt>after</dt>
+     *     <dd>An event name to listener function map, to register event listeners for the "after" moment of the event. A constructor convenience property for the <a href="Base.html#method_after">after</a> method.</dd>
+     *     <dt>bubbleTargets</dt>
+     *     <dd>An object, or array of objects, to register as bubble targets for bubbled events fired by this instance. A constructor convenience property for the <a href="EventTarget.html#method_addTarget">addTarget</a> method.</dd>
+     *     <dt>plugins</dt>
+     *     <dd>A plugin, or array of plugins to be plugged into the instance (see PluginHost's plug method for signature details). A constructor convenience property for the <a href="Plugin.Host.html#method_plug">plug</a> method.</dd>
+     * </dl>
+     */
+    function Base() {
+        Y.BaseCore.apply(this, arguments);
+        Y.BaseEvents.apply(this, arguments);
+    }
+
+    /**
+     * The list of properties which can be configured for
+     * each attribute (e.g. setter, getter, writeOnce, readOnly etc.)
+     *
+     * @property _ATTR_CFG
+     * @type Array
+     * @static
+     * @private
+     */
+    Base._ATTR_CFG      = Y.BaseCore._ATTR_CFG.concat(Y.BaseEvents._ATTR_CFG);
+    Base._ATTR_CFG_HASH = Y.Array.hash(Base._ATTR_CFG);
+
+    /**
+     * The array of non-attribute configuration properties supported by this class.
+     *
+     * `Base` supports "on", "after", "plugins" and "bubbleTargets" properties,
+     * which are not set up as attributes.
+     *
+     * This property is primarily required so that when
+     * <a href="#property__allowAdHocAttrs">`_allowAdHocAttrs`</a> is enabled by
+     * a class, non-attribute configurations don't get added as ad-hoc attributes.
+     *
+     * @property _NON_ATTRS_CFG
+     * @type Array
+     * @static
+     * @private
+     */
+    Base._NON_ATTRS_CFG = Y.BaseCore._NON_ATTRS_CFG.concat(Y.BaseEvents._NON_ATTR_CFG);
+
+    /**
+     * <p>
+     * The string to be used to identify instances of
+     * this class, for example in prefixing events.
+     * </p>
+     * <p>
+     * Classes extending Base, should define their own
+     * static NAME property, which should be camelCase by
+     * convention (e.g. MyClass.NAME = "myClass";).
+     * </p>
+     * @property NAME
+     * @type String
+     * @static
+     */
+    Base.NAME = "base";
+
+    /**
+     * The default set of attributes which will be available for instances of this class, and
+     * their configuration. In addition to the configuration properties listed by
+     * Attribute's <a href="Attribute.html#method_addAttr">addAttr</a> method, the attribute
+     * can also be configured with a "cloneDefaultValue" property, which defines how the statically
+     * defined value field should be protected ("shallow", "deep" and false are supported values).
+     *
+     * By default if the value is an object literal or an array it will be "shallow" cloned, to
+     * protect the default value.
+     *
+     * @property ATTRS
+     * @type Object
+     * @static
+     */
+    Base.ATTRS = Y.AttributeCore.prototype._protectAttrs(Y.BaseCore.ATTRS);
+
+    Base.prototype = {
+
+        /**
+         * Utility method to define the attribute hash used to filter/whitelist property mixes for
+         * this class.
+         *
+         * @method _attrCfgHash
+         * @private
+         */
+        _attrCfgHash: function() {
+            return Base._ATTR_CFG_HASH;
+        }
+
+    };
+
+    Y.mix(Base, Y.BaseCore, false, null, 1);
+
+    // Needs to be `true`, to overwrite methods from `BaseCore`.
+    Y.mix(Base, Y.BaseEvents, true, null, 1);
+
+    // Fix constructor
+    Base.prototype.constructor = Base;
+
+    Y.Base = Base;

src/base/js/BaseCore.js

@@ -180,6 +180,7 @@
          * @private
          */
         _initBase : function(config) {
+            Y.log('init called', 'life', 'base');
 
             Y.stamp(this);