diff -r d334a616c023 -r e16a97fb364a src/cm/media/js/lib/yui/yui3-3.15.0/build/widget-buttons/widget-buttons.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/cm/media/js/lib/yui/yui3-3.15.0/build/widget-buttons/widget-buttons.js	Mon Mar 10 15:19:48 2014 +0100
@@ -0,0 +1,1294 @@
+YUI.add('widget-buttons', function (Y, NAME) {
+
+/**
+Provides header/body/footer button support for Widgets that use the
+`WidgetStdMod` extension.
+
+@module widget-buttons
+@since 3.4.0
+**/
+
+var YArray  = Y.Array,
+    YLang   = Y.Lang,
+    YObject = Y.Object,
+
+    ButtonPlugin = Y.Plugin.Button,
+    Widget       = Y.Widget,
+    WidgetStdMod = Y.WidgetStdMod,
+
+    getClassName = Y.ClassNameManager.getClassName,
+    isArray      = YLang.isArray,
+    isNumber     = YLang.isNumber,
+    isString     = YLang.isString,
+    isValue      = YLang.isValue;
+
+// Utility to determine if an object is a Y.Node instance, even if it was
+// created in a different YUI sandbox.
+function isNode(node) {
+    return !!node.getDOMNode;
+}
+
+/**
+Provides header/body/footer button support for Widgets that use the
+`WidgetStdMod` extension.
+
+This Widget extension makes it easy to declaratively configure a widget's
+buttons. It adds a `buttons` attribute along with button- accessor and mutator
+methods. All button nodes have the `Y.Plugin.Button` plugin applied.
+
+This extension also includes `HTML_PARSER` support to seed a widget's `buttons`
+from those which already exist in its DOM.
+
+@class WidgetButtons
+@extensionfor Widget
+@since 3.4.0
+**/
+function WidgetButtons() {
+    // Has to be setup before the `initializer()`.
+    this._buttonsHandles = {};
+}
+
+WidgetButtons.ATTRS = {
+    /**
+    Collection containing a widget's buttons.
+
+    The collection is an Object which contains an Array of `Y.Node`s for every
+    `WidgetStdMod` section (header, body, footer) which has one or more buttons.
+    All button nodes have the `Y.Plugin.Button` plugin applied.
+
+    This attribute is very flexible in the values it will accept. `buttons` can
+    be specified as a single Array, or an Object of Arrays keyed to a particular
+    section.
+
+    All specified values will be normalized to this type of structure:
+
+        {
+            header: [...],
+            footer: [...]
+        }
+
+    A button can be specified as a `Y.Node`, config Object, or String name for a
+    predefined button on the `BUTTONS` prototype property. When a config Object
+    is provided, it will be merged with any defaults provided by a button with
+    the same `name` defined on the `BUTTONS` property.
+
+    See `addButton()` for the detailed list of configuration properties.
+
+    For convenience, a widget's buttons will always persist and remain rendered
+    after header/body/footer content updates. Buttons should be removed by
+    updating this attribute or using the `removeButton()` method.
+
+    @example
+        {
+            // Uses predefined "close" button by string name.
+            header: ['close'],
+
+            footer: [
+                {
+                    name  : 'cancel',
+                    label : 'Cancel',
+                    action: 'hide'
+                },
+
+                {
+                    name     : 'okay',
+                    label    : 'Okay',
+                    isDefault: true,
+
+                    events: {
+                        click: function (e) {
+                            this.hide();
+                        }
+                    }
+                }
+            ]
+        }
+
+    @attribute buttons
+    @type Object
+    @default {}
+    @since 3.4.0
+    **/
+    buttons: {
+        getter: '_getButtons',
+        setter: '_setButtons',
+        value : {}
+    },
+
+    /**
+    The current default button as configured through this widget's `buttons`.
+
+    A button can be configured as the default button in the following ways:
+
+      * As a config Object with an `isDefault` property:
+        `{label: 'Okay', isDefault: true}`.
+
+      * As a Node with a `data-default` attribute:
+        `<button data-default="true">Okay</button>`.
+
+    This attribute is **read-only**; anytime there are changes to this widget's
+    `buttons`, the `defaultButton` will be updated if needed.
+
+    **Note:** If two or more buttons are configured to be the default button,
+    the last one wins.
+
+    @attribute defaultButton
+    @type Node
+    @default null
+    @readOnly
+    @since 3.5.0
+    **/
+    defaultButton: {
+        readOnly: true,
+        value   : null
+    }
+};
+
+/**
+CSS classes used by `WidgetButtons`.
+
+@property CLASS_NAMES
+@type Object
+@static
+@since 3.5.0
+**/
+WidgetButtons.CLASS_NAMES = {
+    button : getClassName('button'),
+    buttons: Widget.getClassName('buttons'),
+    primary: getClassName('button', 'primary')
+};
+
+WidgetButtons.HTML_PARSER = {
+    buttons: function (srcNode) {
+        return this._parseButtons(srcNode);
+    }
+};
+
+/**
+The list of button configuration properties which are specific to
+`WidgetButtons` and should not be passed to `Y.Plugin.Button.createNode()`.
+
+@property NON_BUTTON_NODE_CFG
+@type Array
+@static
+@since 3.5.0
+**/
+WidgetButtons.NON_BUTTON_NODE_CFG = [
+    'action', 'classNames', 'context', 'events', 'isDefault', 'section'
+];
+
+WidgetButtons.prototype = {
+    // -- Public Properties ----------------------------------------------------
+
+    /**
+    Collection of predefined buttons mapped by name -> config.
+
+    These button configurations will serve as defaults for any button added to a
+    widget's buttons which have the same `name`.
+
+    See `addButton()` for a list of possible configuration values.
+
+    @property BUTTONS
+    @type Object
+    @default {}
+    @see addButton()
+    @since 3.5.0
+    **/
+    BUTTONS: {},
+
+    /**
+    The HTML template to use when creating the node which wraps all buttons of a
+    section. By default it will have the CSS class: "yui3-widget-buttons".
+
+    @property BUTTONS_TEMPLATE
+    @type String
+    @default "<span />"
+    @since 3.5.0
+    **/
+    BUTTONS_TEMPLATE: '<span />',
+
+    /**
+    The default section to render buttons in when no section is specified.
+
+    @property DEFAULT_BUTTONS_SECTION
+    @type String
+    @default Y.WidgetStdMod.FOOTER
+    @since 3.5.0
+    **/
+    DEFAULT_BUTTONS_SECTION: WidgetStdMod.FOOTER,
+
+    // -- Protected Properties -------------------------------------------------
+
+    /**
+    A map of button node `_yuid` -> event-handle for all button nodes which were
+    created by this widget.
+
+    @property _buttonsHandles
+    @type Object
+    @protected
+    @since 3.5.0
+    **/
+
+    /**
+    A map of this widget's `buttons`, both name -> button and
+    section:name -> button.
+
+    @property _buttonsMap
+    @type Object
+    @protected
+    @since 3.5.0
+    **/
+
+    /**
+    Internal reference to this widget's default button.
+
+    @property _defaultButton
+    @type Node
+    @protected
+    @since 3.5.0
+    **/
+
+    // -- Lifecycle Methods ----------------------------------------------------
+
+    initializer: function () {
+        // Require `Y.WidgetStdMod`.
+        if (!this._stdModNode) {
+            Y.error('WidgetStdMod must be added to a Widget before WidgetButtons.');
+        }
+
+        // Creates button mappings and sets the `defaultButton`.
+        this._mapButtons(this.get('buttons'));
+        this._updateDefaultButton();
+
+        // Bound with `Y.bind()` to make more extensible.
+        this.after({
+            buttonsChange      : Y.bind('_afterButtonsChange', this),
+            defaultButtonChange: Y.bind('_afterDefaultButtonChange', this)
+        });
+
+        Y.after(this._bindUIButtons, this, 'bindUI');
+        Y.after(this._syncUIButtons, this, 'syncUI');
+    },
+
+    destructor: function () {
+        // Detach all event subscriptions this widget added to its `buttons`.
+        YObject.each(this._buttonsHandles, function (handle) {
+            handle.detach();
+        });
+
+        delete this._buttonsHandles;
+        delete this._buttonsMap;
+        delete this._defaultButton;
+    },
+
+    // -- Public Methods -------------------------------------------------------
+
+    /**
+    Adds a button to this widget.
+
+    The new button node will have the `Y.Plugin.Button` plugin applied, be added
+    to this widget's `buttons`, and rendered in the specified `section` at the
+    specified `index` (or end of the section when no `index` is provided). If
+    the section does not exist, it will be created.
+
+    This fires the `buttonsChange` event and adds the following properties to
+    the event facade:
+
+      * `button`: The button node or config object to add.
+
+      * `section`: The `WidgetStdMod` section (header/body/footer) where the
+        button will be added.
+
+      * `index`: The index at which the button will be in the section.
+
+      * `src`: "add"
+
+    **Note:** The `index` argument will be passed to the Array `splice()`
+    method, therefore a negative value will insert the `button` that many items
+    from the end. The `index` property on the `buttonsChange` event facade is
+    the index at which the `button` was added.
+
+    @method addButton
+    @param {Node|Object|String} button The button to add. This can be a `Y.Node`
+        instance, config Object, or String name for a predefined button on the
+        `BUTTONS` prototype property. When a config Object is provided, it will
+        be merged with any defaults provided by any `srcNode` and/or a button
+        with the same `name` defined on the `BUTTONS` property. The following
+        are the possible configuration properties beyond what Node plugins
+        accept by default:
+      @param {Function|String} [button.action] The default handler that should
+        be called when the button is clicked. A String name of a Function that
+        exists on the `context` object can also be provided. **Note:**
+        Specifying a set of `events` will override this setting.
+      @param {String|String[]} [button.classNames] Additional CSS classes to add
+        to the button node.
+      @param {Object} [button.context=this] Context which any `events` or
+        `action` should be called with. Defaults to `this`, the widget.
+        **Note:** `e.target` will access the button node in the event handlers.
+      @param {Boolean} [button.disabled=false] Whether the button should be
+        disabled.
+      @param {String|Object} [button.events="click"] Event name, or set of
+        events and handlers to bind to the button node. **See:** `Y.Node.on()`,
+        this value is passed as the first argument to `on()`.
+      @param {Boolean} [button.isDefault=false] Whether the button is the
+        default button.
+      @param {String} [button.label] The visible text/value displayed in the
+        button.
+      @param {String} [button.name] A name which can later be used to reference
+        this button. If a button is defined on the `BUTTONS` property with this
+        same name, its configuration properties will be merged in as defaults.
+      @param {String} [button.section] The `WidgetStdMod` section (header, body,
+        footer) where the button should be added.
+      @param {Node} [button.srcNode] An existing Node to use for the button,
+        default values will be seeded from this node, but are overriden by any
+        values specified in the config object. By default a new &lt;button&gt;
+        node will be created.
+      @param {String} [button.template] A specific template to use when creating
+        a new button node (e.g. "&lt;a /&gt;"). **Note:** Specifying a `srcNode`
+        will overide this.
+    @param {String} [section="footer"] The `WidgetStdMod` section
+        (header/body/footer) where the button should be added. This takes
+        precedence over the `button.section` configuration property.
+    @param {Number} [index] The index at which the button should be inserted. If
+        not specified, the button will be added to the end of the section. This
+        value is passed to the Array `splice()` method, therefore a negative
+        value will insert the `button` that many items from the end.
+    @chainable
+    @see Plugin.Button.createNode()
+    @since 3.4.0
+    **/
+    addButton: function (button, section, index) {
+        var buttons = this.get('buttons'),
+            sectionButtons, atIndex;
+
+        // Makes sure we have the full config object.
+        if (!isNode(button)) {
+            button = this._mergeButtonConfig(button);
+            section || (section = button.section);
+        }
+
+        section || (section = this.DEFAULT_BUTTONS_SECTION);
+        sectionButtons = buttons[section] || (buttons[section] = []);
+        isNumber(index) || (index = sectionButtons.length);
+
+        // Insert new button at the correct position.
+        sectionButtons.splice(index, 0, button);
+
+        // Determine the index at which the `button` now exists in the array.
+        atIndex = YArray.indexOf(sectionButtons, button);
+
+        this.set('buttons', buttons, {
+            button : button,
+            section: section,
+            index  : atIndex,
+            src    : 'add'
+        });
+
+        return this;
+    },
+
+    /**
+    Returns a button node from this widget's `buttons`.
+
+    @method getButton
+    @param {Number|String} name The string name or index of the button.
+    @param {String} [section="footer"] The `WidgetStdMod` section
+        (header/body/footer) where the button exists. Only applicable when
+        looking for a button by numerical index, or by name but scoped to a
+        particular section.
+    @return {Node} The button node.
+    @since 3.5.0
+    **/
+    getButton: function (name, section) {
+        if (!isValue(name)) { return; }
+
+        var map = this._buttonsMap,
+            buttons;
+
+        section || (section = this.DEFAULT_BUTTONS_SECTION);
+
+        // Supports `getButton(1, 'header')` signature.
+        if (isNumber(name)) {
+            buttons = this.get('buttons');
+            return buttons[section] && buttons[section][name];
+        }
+
+        // Looks up button by name or section:name.
+        return arguments.length > 1 ? map[section + ':' + name] : map[name];
+    },
+
+    /**
+    Removes a button from this widget.
+
+    The button will be removed from this widget's `buttons` and its DOM. Any
+    event subscriptions on the button which were created by this widget will be
+    detached. If the content section becomes empty after removing the button
+    node, then the section will also be removed.
+
+    This fires the `buttonsChange` event and adds the following properties to
+    the event facade:
+
+      * `button`: The button node to remove.
+
+      * `section`: The `WidgetStdMod` section (header/body/footer) where the
+        button should be removed from.
+
+      * `index`: The index at which the button exists in the section.
+
+      * `src`: "remove"
+
+    @method removeButton
+    @param {Node|Number|String} button The button to remove. This can be a
+        `Y.Node` instance, index, or String name of a button.
+    @param {String} [section="footer"] The `WidgetStdMod` section
+        (header/body/footer) where the button exists. Only applicable when
+        removing a button by numerical index, or by name but scoped to a
+        particular section.
+    @chainable
+    @since 3.5.0
+    **/
+    removeButton: function (button, section) {
+        if (!isValue(button)) { return this; }
+
+        var buttons = this.get('buttons'),
+            index;
+
+        // Shortcut if `button` is already an index which is needed for slicing.
+        if (isNumber(button)) {
+            section || (section = this.DEFAULT_BUTTONS_SECTION);
+            index  = button;
+            button = buttons[section][index];
+        } else {
+            // Supports `button` being the string name.
+            if (isString(button)) {
+                // `getButton()` is called this way because its behavior is
+                // different based on the number of arguments.
+                button = this.getButton.apply(this, arguments);
+            }
+
+            // Determines the `section` and `index` at which the button exists.
+            YObject.some(buttons, function (sectionButtons, currentSection) {
+                index = YArray.indexOf(sectionButtons, button);
+
+                if (index > -1) {
+                    section = currentSection;
+                    return true;
+                }
+            });
+        }
+
+        // Button was found at an appropriate index.
+        if (button && index > -1) {
+            // Remove button from `section` array.
+            buttons[section].splice(index, 1);
+
+            this.set('buttons', buttons, {
+                button : button,
+                section: section,
+                index  : index,
+                src    : 'remove'
+            });
+        }
+
+        return this;
+    },
+
+    // -- Protected Methods ----------------------------------------------------
+
+    /**
+    Binds UI event listeners. This method is inserted via AOP, and will execute
+    after `bindUI()`.
+
+    @method _bindUIButtons
+    @protected
+    @since 3.4.0
+    **/
+    _bindUIButtons: function () {
+        // Event handlers are bound with `bind()` to make them more extensible.
+        var afterContentChange = Y.bind('_afterContentChangeButtons', this);
+
+        this.after({
+            visibleChange      : Y.bind('_afterVisibleChangeButtons', this),
+            headerContentChange: afterContentChange,
+            bodyContentChange  : afterContentChange,
+            footerContentChange: afterContentChange
+        });
+    },
+
+    /**
+    Returns a button node based on the specified `button` node or configuration.
+
+    The button node will either be created via `Y.Plugin.Button.createNode()`,
+    or when `button` is specified as a node already, it will by `plug()`ed with
+    `Y.Plugin.Button`.
+
+    @method _createButton
+    @param {Node|Object} button Button node or configuration object.
+    @return {Node} The button node.
+    @protected
+    @since 3.5.0
+    **/
+    _createButton: function (button) {
+        var config, buttonConfig, nonButtonNodeCfg,
+            i, len, action, context, handle;
+
+        // Makes sure the exiting `Y.Node` instance is from this YUI sandbox and
+        // is plugged with `Y.Plugin.Button`.
+        if (isNode(button)) {
+            return Y.one(button.getDOMNode()).plug(ButtonPlugin);
+        }
+
+        // Merge `button` config with defaults and back-compat.
+        config = Y.merge({
+            context: this,
+            events : 'click',
+            label  : button.value
+        }, button);
+
+        buttonConfig     = Y.merge(config);
+        nonButtonNodeCfg = WidgetButtons.NON_BUTTON_NODE_CFG;
+
+        // Remove all non-button Node config props.
+        for (i = 0, len = nonButtonNodeCfg.length; i < len; i += 1) {
+            delete buttonConfig[nonButtonNodeCfg[i]];
+        }
+
+        // Create the button node using the button Node-only config.
+        button = ButtonPlugin.createNode(buttonConfig);
+
+        context = config.context;
+        action  = config.action;
+
+        // Supports `action` as a String name of a Function on the `context`
+        // object.
+        if (isString(action)) {
+            action = Y.bind(action, context);
+        }
+
+        // Supports all types of crazy configs for event subscriptions and
+        // stores a reference to the returned `EventHandle`.
+        handle = button.on(config.events, action, context);
+        this._buttonsHandles[Y.stamp(button, true)] = handle;
+
+        // Tags the button with the configured `name` and `isDefault` settings.
+        button.setData('name', this._getButtonName(config));
+        button.setData('default', this._getButtonDefault(config));
+
+        // Add any CSS classnames to the button node.
+        YArray.each(YArray(config.classNames), button.addClass, button);
+
+        return button;
+    },
+
+    /**
+    Returns the buttons container for the specified `section`, passing a truthy
+    value for `create` will create the node if it does not already exist.
+
+    **Note:** It is up to the caller to properly insert the returned container
+    node into the content section.
+
+    @method _getButtonContainer
+    @param {String} section The `WidgetStdMod` section (header/body/footer).
+    @param {Boolean} create Whether the buttons container should be created if
+        it does not already exist.
+    @return {Node} The buttons container node for the specified `section`.
+    @protected
+    @see BUTTONS_TEMPLATE
+    @since 3.5.0
+    **/
+    _getButtonContainer: function (section, create) {
+        var sectionClassName = WidgetStdMod.SECTION_CLASS_NAMES[section],
+            buttonsClassName = WidgetButtons.CLASS_NAMES.buttons,
+            contentBox       = this.get('contentBox'),
+            containerSelector, container;
+
+        // Search for an existing buttons container within the section.
+        containerSelector = '.' + sectionClassName + ' .' + buttonsClassName;
+        container         = contentBox.one(containerSelector);
+
+        // Create the `container` if it doesn't already exist.
+        if (!container && create) {
+            container = Y.Node.create(this.BUTTONS_TEMPLATE);
+            container.addClass(buttonsClassName);
+        }
+
+        return container;
+    },
+
+    /**
+    Returns whether or not the specified `button` is configured to be the
+    default button.
+
+    When a button node is specified, the button's `getData()` method will be
+    used to determine if the button is configured to be the default. When a
+    button config object is specified, the `isDefault` prop will determine
+    whether the button is the default.
+
+    **Note:** `<button data-default="true"></button>` is supported via the
+    `button.getData('default')` API call.
+
+    @method _getButtonDefault
+    @param {Node|Object} button The button node or configuration object.
+    @return {Boolean} Whether the button is configured to be the default button.
+    @protected
+    @since 3.5.0
+    **/
+    _getButtonDefault: function (button) {
+        var isDefault = isNode(button) ?
+                button.getData('default') : button.isDefault;
+
+        if (isString(isDefault)) {
+            return isDefault.toLowerCase() === 'true';
+        }
+
+        return !!isDefault;
+    },
+
+    /**
+    Returns the name of the specified `button`.
+
+    When a button node is specified, the button's `getData('name')` method is
+    preferred, but will fallback to `get('name')`, and the result will determine
+    the button's name. When a button config object is specified, the `name` prop
+    will determine the button's name.
+
+    **Note:** `<button data-name="foo"></button>` is supported via the
+    `button.getData('name')` API call.
+
+    @method _getButtonName
+    @param {Node|Object} button The button node or configuration object.
+    @return {String} The name of the button.
+    @protected
+    @since 3.5.0
+    **/
+    _getButtonName: function (button) {
+        var name;
+
+        if (isNode(button)) {
+            name = button.getData('name') || button.get('name');
+        } else {
+            name = button && (button.name || button.type);
+        }
+
+        return name;
+    },
+
+    /**
+    Getter for the `buttons` attribute. A copy of the `buttons` object is
+    returned so the stored state cannot be modified by the callers of
+    `get('buttons')`.
+
+    This will recreate a copy of the `buttons` object, and each section array
+    (the button nodes are *not* copied/cloned.)
+
+    @method _getButtons
+    @param {Object} buttons The widget's current `buttons` state.
+    @return {Object} A copy of the widget's current `buttons` state.
+    @protected
+    @since 3.5.0
+    **/
+    _getButtons: function (buttons) {
+        var buttonsCopy = {};
+
+        // Creates a new copy of the `buttons` object.
+        YObject.each(buttons, function (sectionButtons, section) {
+            // Creates of copy of the array of button nodes.
+            buttonsCopy[section] = sectionButtons.concat();
+        });
+
+        return buttonsCopy;
+    },
+
+    /**
+    Adds the specified `button` to the buttons map (both name -> button and
+    section:name -> button), and sets the button as the default if it is
+    configured as the default button.
+
+    **Note:** If two or more buttons are configured with the same `name` and/or
+    configured to be the default button, the last one wins.
+
+    @method _mapButton
+    @param {Node} button The button node to map.
+    @param {String} section The `WidgetStdMod` section (header/body/footer).
+    @protected
+    @since 3.5.0
+    **/
+    _mapButton: function (button, section) {
+        var map       = this._buttonsMap,
+            name      = this._getButtonName(button),
+            isDefault = this._getButtonDefault(button);
+
+        if (name) {
+            // name -> button
+            map[name] = button;
+
+            // section:name -> button
+            map[section + ':' + name] = button;
+        }
+
+        isDefault && (this._defaultButton = button);
+    },
+
+    /**
+    Adds the specified `buttons` to the buttons map (both name -> button and
+    section:name -> button), and set the a button as the default if one is
+    configured as the default button.
+
+    **Note:** This will clear all previous button mappings and null-out any
+    previous default button! If two or more buttons are configured with the same
+    `name` and/or configured to be the default button, the last one wins.
+
+    @method _mapButtons
+    @param {Node[]} buttons The button nodes to map.
+    @protected
+    @since 3.5.0
+    **/
+    _mapButtons: function (buttons) {
+        this._buttonsMap    = {};
+        this._defaultButton = null;
+
+        YObject.each(buttons, function (sectionButtons, section) {
+            var i, len;
+
+            for (i = 0, len = sectionButtons.length; i < len; i += 1) {
+                this._mapButton(sectionButtons[i], section);
+            }
+        }, this);
+    },
+
+    /**
+    Returns a copy of the specified `config` object merged with any defaults
+    provided by a `srcNode` and/or a predefined configuration for a button
+    with the same `name` on the `BUTTONS` property.
+
+    @method _mergeButtonConfig
+    @param {Object|String} config Button configuration object, or string name.
+    @return {Object} A copy of the button configuration object merged with any
+        defaults.
+    @protected
+    @since 3.5.0
+    **/
+    _mergeButtonConfig: function (config) {
+        var buttonConfig, defConfig, name, button, tagName, label;
+
+        // Makes sure `config` is an Object and a copy of the specified value.
+        config = isString(config) ? {name: config} : Y.merge(config);
+
+        // Seeds default values from the button node, if there is one.
+        if (config.srcNode) {
+            button  = config.srcNode;
+            tagName = button.get('tagName').toLowerCase();
+            label   = button.get(tagName === 'input' ? 'value' : 'text');
+
+            // Makes sure the button's current values override any defaults.
+            buttonConfig = {
+                disabled : !!button.get('disabled'),
+                isDefault: this._getButtonDefault(button),
+                name     : this._getButtonName(button)
+            };
+
+            // Label should only be considered when not an empty string.
+            label && (buttonConfig.label = label);
+
+            // Merge `config` with `buttonConfig` values.
+            Y.mix(config, buttonConfig, false, null, 0, true);
+        }
+
+        name      = this._getButtonName(config);
+        defConfig = this.BUTTONS && this.BUTTONS[name];
+
+        // Merge `config` with predefined default values.
+        if (defConfig) {
+            Y.mix(config, defConfig, false, null, 0, true);
+        }
+
+        return config;
+    },
+
+    /**
+    `HTML_PARSER` implementation for the `buttons` attribute.
+
+    **Note:** To determine a button node's name its `data-name` and `name`
+    attributes are examined. Whether the button should be the default is
+    determined by its `data-default` attribute.
+
+    @method _parseButtons
+    @param {Node} srcNode This widget's srcNode to search for buttons.
+    @return {null|Object} `buttons` Config object parsed from this widget's DOM.
+    @protected
+    @since 3.5.0
+    **/
+    _parseButtons: function (srcNode) {
+        var buttonSelector = '.' + WidgetButtons.CLASS_NAMES.button,
+            sections       = ['header', 'body', 'footer'],
+            buttonsConfig  = null;
+
+        YArray.each(sections, function (section) {
+            var container = this._getButtonContainer(section),
+                buttons   = container && container.all(buttonSelector),
+                sectionButtons;
+
+            if (!buttons || buttons.isEmpty()) { return; }
+
+            sectionButtons = [];
+
+            // Creates a button config object for every button node found and
+            // adds it to the section. This way each button configuration can be
+            // merged with any defaults provided by predefined `BUTTONS`.
+            buttons.each(function (button) {
+                sectionButtons.push({srcNode: button});
+            });
+
+            buttonsConfig || (buttonsConfig = {});
+            buttonsConfig[section] = sectionButtons;
+        }, this);
+
+        return buttonsConfig;
+    },
+
+    /**
+    Setter for the `buttons` attribute. This processes the specified `config`
+    and returns a new `buttons` object which is stored as the new state; leaving
+    the original, specified `config` unmodified.
+
+    The button nodes will either be created via `Y.Plugin.Button.createNode()`,
+    or when a button is already a Node already, it will by `plug()`ed with
+    `Y.Plugin.Button`.
+
+    @method _setButtons
+    @param {Array|Object} config The `buttons` configuration to process.
+    @return {Object} The processed `buttons` object which represents the new
+        state.
+    @protected
+    @since 3.5.0
+    **/
+    _setButtons: function (config) {
+        var defSection = this.DEFAULT_BUTTONS_SECTION,
+            buttons    = {};
+
+        function processButtons(buttonConfigs, currentSection) {
+            if (!isArray(buttonConfigs)) { return; }
+
+            var i, len, button, section;
+
+            for (i = 0, len = buttonConfigs.length; i < len; i += 1) {
+                button  = buttonConfigs[i];
+                section = currentSection;
+
+                if (!isNode(button)) {
+                    button = this._mergeButtonConfig(button);
+                    section || (section = button.section);
+                }
+
+                // Always passes through `_createButton()` to make sure the node
+                // is decorated as a button.
+                button = this._createButton(button);
+
+                // Use provided `section` or fallback to the default section.
+                section || (section = defSection);
+
+                // Add button to the array of buttons for the specified section.
+                (buttons[section] || (buttons[section] = [])).push(button);
+            }
+        }
+
+        // Handle `config` being either an Array or Object of Arrays.
+        if (isArray(config)) {
+            processButtons.call(this, config);
+        } else {
+            YObject.each(config, processButtons, this);
+        }
+
+        return buttons;
+    },
+
+    /**
+    Syncs this widget's current button-related state to its DOM. This method is
+    inserted via AOP, and will execute after `syncUI()`.
+
+    @method _syncUIButtons
+    @protected
+    @since 3.4.0
+    **/
+    _syncUIButtons: function () {
+        this._uiSetButtons(this.get('buttons'));
+        this._uiSetDefaultButton(this.get('defaultButton'));
+        this._uiSetVisibleButtons(this.get('visible'));
+    },
+
+    /**
+    Inserts the specified `button` node into this widget's DOM at the specified
+    `section` and `index` and updates the section content.
+
+    The section and button container nodes will be created if they do not
+    already exist.
+
+    @method _uiInsertButton
+    @param {Node} button The button node to insert into this widget's DOM.
+    @param {String} section The `WidgetStdMod` section (header/body/footer).
+    @param {Number} index Index at which the `button` should be positioned.
+    @protected
+    @since 3.5.0
+    **/
+    _uiInsertButton: function (button, section, index) {
+        var buttonsClassName = WidgetButtons.CLASS_NAMES.button,
+            buttonContainer  = this._getButtonContainer(section, true),
+            sectionButtons   = buttonContainer.all('.' + buttonsClassName);
+
+        // Inserts the button node at the correct index.
+        buttonContainer.insertBefore(button, sectionButtons.item(index));
+
+        // Adds the button container to the section content.
+        this.setStdModContent(section, buttonContainer, 'after');
+    },
+
+    /**
+    Removes the button node from this widget's DOM and detaches any event
+    subscriptions on the button that were created by this widget. The section
+    content will be updated unless `{preserveContent: true}` is passed in the
+    `options`.
+
+    By default the button container node will be removed when this removes the
+    last button of the specified `section`; and if no other content remains in
+    the section node, it will also be removed.
+
+    @method _uiRemoveButton
+    @param {Node} button The button to remove and destroy.
+    @param {String} section The `WidgetStdMod` section (header/body/footer).
+    @param {Object} [options] Additional options.
+      @param {Boolean} [options.preserveContent=false] Whether the section
+        content should be updated.
+    @protected
+    @since 3.5.0
+    **/
+    _uiRemoveButton: function (button, section, options) {
+        var yuid    = Y.stamp(button, this),
+            handles = this._buttonsHandles,
+            handle  = handles[yuid],
+            buttonContainer, buttonClassName;
+
+        if (handle) {
+            handle.detach();
+        }
+
+        delete handles[yuid];
+
+        button.remove();
+
+        options || (options = {});
+
+        // Remove the button container and section nodes if needed.
+        if (!options.preserveContent) {
+            buttonContainer = this._getButtonContainer(section);
+            buttonClassName = WidgetButtons.CLASS_NAMES.button;
+
+            // Only matters if we have a button container which is empty.
+            if (buttonContainer &&
+                    buttonContainer.all('.' + buttonClassName).isEmpty()) {
+
+                buttonContainer.remove();
+                this._updateContentButtons(section);
+            }
+        }
+    },
+
+    /**
+    Sets the current `buttons` state to this widget's DOM by rendering the
+    specified collection of `buttons` and updates the contents of each section
+    as needed.
+
+    Button nodes which already exist in the DOM will remain intact, or will be
+    moved if they should be in a new position. Old button nodes which are no
+    longer represented in the specified `buttons` collection will be removed,
+    and any event subscriptions on the button which were created by this widget
+    will be detached.
+
+    If the button nodes in this widget's DOM actually change, then each content
+    section will be updated (or removed) appropriately.
+
+    @method _uiSetButtons
+    @param {Object} buttons The current `buttons` state to visually represent.
+    @protected
+    @since 3.5.0
+    **/
+    _uiSetButtons: function (buttons) {
+        var buttonClassName = WidgetButtons.CLASS_NAMES.button,
+            sections        = ['header', 'body', 'footer'];
+
+        YArray.each(sections, function (section) {
+            var sectionButtons  = buttons[section] || [],
+                numButtons      = sectionButtons.length,
+                buttonContainer = this._getButtonContainer(section, numButtons),
+                buttonsUpdated  = false,
+                oldNodes, i, button, buttonIndex;
+
+            // When there's no button container, there are no new buttons or old
+            // buttons that we have to deal with for this section.
+            if (!buttonContainer) { return; }
+
+            oldNodes = buttonContainer.all('.' + buttonClassName);
+
+            for (i = 0; i < numButtons; i += 1) {
+                button      = sectionButtons[i];
+                buttonIndex = oldNodes.indexOf(button);
+
+                // Buttons already rendered in the Widget should remain there or
+                // moved to their new index. New buttons will be added to the
+                // current `buttonContainer`.
+                if (buttonIndex > -1) {
+                    // Remove button from existing buttons nodeList since its in
+                    // the DOM already.
+                    oldNodes.splice(buttonIndex, 1);
+
+                    // Check that the button is at the right position, if not,
+                    // move it to its new position.
+                    if (buttonIndex !== i) {
+                        // Using `i + 1` because the button should be at index
+                        // `i`; it's inserted before the node which comes after.
+                        buttonContainer.insertBefore(button, i + 1);
+                        buttonsUpdated = true;
+                    }
+                } else {
+                    buttonContainer.appendChild(button);
+                    buttonsUpdated = true;
+                }
+            }
+
+            // Safely removes the old button nodes which are no longer part of
+            // this widget's `buttons`.
+            oldNodes.each(function (button) {
+                this._uiRemoveButton(button, section, {preserveContent: true});
+                buttonsUpdated = true;
+            }, this);
+
+            // Remove leftover empty button containers and updated the StdMod
+            // content area.
+            if (numButtons === 0) {
+                buttonContainer.remove();
+                this._updateContentButtons(section);
+                return;
+            }
+
+            // Adds the button container to the section content.
+            if (buttonsUpdated) {
+                this.setStdModContent(section, buttonContainer, 'after');
+            }
+        }, this);
+    },
+
+    /**
+    Adds the "yui3-button-primary" CSS class to the new `defaultButton` and
+    removes it from the old default button.
+
+    @method _uiSetDefaultButton
+    @param {Node} newButton The new `defaultButton`.
+    @param {Node} oldButton The old `defaultButton`.
+    @protected
+    @since 3.5.0
+    **/
+    _uiSetDefaultButton: function (newButton, oldButton) {
+        var primaryClassName = WidgetButtons.CLASS_NAMES.primary;
+
+        if (newButton) { newButton.addClass(primaryClassName); }
+        if (oldButton) { oldButton.removeClass(primaryClassName); }
+    },
+
+    /**
+    Focuses this widget's `defaultButton` if there is one and this widget is
+    visible.
+
+    @method _uiSetVisibleButtons
+    @param {Boolean} visible Whether this widget is visible.
+    @protected
+    @since 3.5.0
+    **/
+    _uiSetVisibleButtons: function (visible) {
+        if (!visible) { return; }
+
+        var defaultButton = this.get('defaultButton');
+        if (defaultButton) {
+            defaultButton.focus();
+        }
+    },
+
+    /**
+    Removes the specified `button` from the buttons map (both name -> button and
+    section:name -> button), and nulls-out the `defaultButton` if it is
+    currently the default button.
+
+    @method _unMapButton
+    @param {Node} button The button node to remove from the buttons map.
+    @param {String} section The `WidgetStdMod` section (header/body/footer).
+    @protected
+    @since 3.5.0
+    **/
+    _unMapButton: function (button, section) {
+        var map  = this._buttonsMap,
+            name = this._getButtonName(button),
+            sectionName;
+
+        // Only delete the map entry if the specified `button` is mapped to it.
+        if (name) {
+            // name -> button
+            if (map[name] === button) {
+                delete map[name];
+            }
+
+            // section:name -> button
+            sectionName = section + ':' + name;
+            if (map[sectionName] === button) {
+                delete map[sectionName];
+            }
+        }
+
+        // Clear the default button if its the specified `button`.
+        if (this._defaultButton === button) {
+            this._defaultButton = null;
+        }
+    },
+
+    /**
+    Updates the `defaultButton` attribute if it needs to be updated by comparing
+    its current value with the protected `_defaultButton` property.
+
+    @method _updateDefaultButton
+    @protected
+    @since 3.5.0
+    **/
+    _updateDefaultButton: function () {
+        var defaultButton = this._defaultButton;
+
+        if (this.get('defaultButton') !== defaultButton) {
+            this._set('defaultButton', defaultButton);
+        }
+    },
+
+    /**
+    Updates the content attribute which corresponds to the specified `section`.
+
+    The method updates the section's content to its current `childNodes`
+    (text and/or HTMLElement), or will null-out its contents if the section is
+    empty. It also specifies a `src` of `buttons` on the change event facade.
+
+    @method _updateContentButtons
+    @param {String} section The `WidgetStdMod` section (header/body/footer) to
+        update.
+    @protected
+    @since 3.5.0
+    **/
+    _updateContentButtons: function (section) {
+        // `childNodes` return text nodes and HTMLElements.
+        var sectionContent = this.getStdModNode(section).get('childNodes');
+
+        // Updates the section to its current contents, or null if it is empty.
+        this.set(section + 'Content', sectionContent.isEmpty() ? null :
+            sectionContent, {src: 'buttons'});
+    },
+
+    // -- Protected Event Handlers ---------------------------------------------
+
+    /**
+    Handles this widget's `buttonsChange` event which fires anytime the
+    `buttons` attribute is modified.
+
+    **Note:** This method special-cases the `buttons` modifications caused by
+    `addButton()` and `removeButton()`, both of which set the `src` property on
+    the event facade to "add" and "remove" respectively.
+
+    @method _afterButtonsChange
+    @param {EventFacade} e
+    @protected
+    @since 3.4.0
+    **/
+    _afterButtonsChange: function (e) {
+        var buttons = e.newVal,
+            section = e.section,
+            index   = e.index,
+            src     = e.src,
+            button;
+
+        // Special cases `addButton()` to only set and insert the new button.
+        if (src === 'add') {
+            // Make sure we have the button node.
+            button = buttons[section][index];
+
+            this._mapButton(button, section);
+            this._updateDefaultButton();
+            this._uiInsertButton(button, section, index);
+
+            return;
+        }
+
+        // Special cases `removeButton()` to only remove the specified button.
+        if (src === 'remove') {
+            // Button node already exists on the event facade.
+            button = e.button;
+
+            this._unMapButton(button, section);
+            this._updateDefaultButton();
+            this._uiRemoveButton(button, section);
+
+            return;
+        }
+
+        this._mapButtons(buttons);
+        this._updateDefaultButton();
+        this._uiSetButtons(buttons);
+    },
+
+    /**
+    Handles this widget's `headerContentChange`, `bodyContentChange`,
+    `footerContentChange` events by making sure the `buttons` remain rendered
+    after changes to the content areas.
+
+    These events are very chatty, so extra caution is taken to avoid doing extra
+    work or getting into an infinite loop.
+
+    @method _afterContentChangeButtons
+    @param {EventFacade} e
+    @protected
+    @since 3.5.0
+    **/
+    _afterContentChangeButtons: function (e) {
+        var src     = e.src,
+            pos     = e.stdModPosition,
+            replace = !pos || pos === WidgetStdMod.REPLACE;
+
+        // Only do work when absolutely necessary.
+        if (replace && src !== 'buttons' && src !== Widget.UI_SRC) {
+            this._uiSetButtons(this.get('buttons'));
+        }
+    },
+
+    /**
+    Handles this widget's `defaultButtonChange` event by adding the
+    "yui3-button-primary" CSS class to the new `defaultButton` and removing it
+    from the old default button.
+
+    @method _afterDefaultButtonChange
+    @param {EventFacade} e
+    @protected
+    @since 3.5.0
+    **/
+    _afterDefaultButtonChange: function (e) {
+        this._uiSetDefaultButton(e.newVal, e.prevVal);
+    },
+
+    /**
+    Handles this widget's `visibleChange` event by focusing the `defaultButton`
+    if there is one.
+
+    @method _afterVisibleChangeButtons
+    @param {EventFacade} e
+    @protected
+    @since 3.5.0
+    **/
+    _afterVisibleChangeButtons: function (e) {
+        this._uiSetVisibleButtons(e.newVal);
+    }
+};
+
+Y.WidgetButtons = WidgetButtons;
+
+
+}, '@VERSION@', {"requires": ["button-plugin", "cssbutton", "widget-stdmod"]});