/*
Copyright (c) 2010, Yahoo! Inc. All rights reserved.
Code licensed under the BSD License:
http://developer.yahoo.com/yui/license.html
version: 3.3.0
build: 3167
*/
YUI.add('node-base', function(Y) {

/**
 * The Node Utility provides a DOM-like interface for interacting with DOM nodes.
 * @module node
 * @submodule node-base
 */

/**
 * The Node class provides a wrapper for manipulating DOM Nodes.
 * Node properties can be accessed via the set/get methods.
 * Use Y.get() to retrieve Node instances.
 *
 * <strong>NOTE:</strong> Node properties are accessed using
 * the <code>set</code> and <code>get</code> methods.
 *
 * @class Node
 * @constructor
 * @param {DOMNode} node the DOM node to be mapped to the Node instance.
 * @for Node
 */

// "globals"
var DOT = '.',
    NODE_NAME = 'nodeName',
    NODE_TYPE = 'nodeType',
    OWNER_DOCUMENT = 'ownerDocument',
    TAG_NAME = 'tagName',
    UID = '_yuid',

    _slice = Array.prototype.slice,

    Y_DOM = Y.DOM,

    Y_Node = function(node) {
        var uid = (node.nodeType !== 9) ? node.uniqueID : node[UID];

        if (uid && Y_Node._instances[uid] && Y_Node._instances[uid]._node !== node) {
            node[UID] = null; // unset existing uid to prevent collision (via clone or hack)
        }

        uid = uid || Y.stamp(node);
        if (!uid) { // stamp failed; likely IE non-HTMLElement
            uid = Y.guid();
        }

        this[UID] = uid;

        /**
         * The underlying DOM node bound to the Y.Node instance
         * @property _node
         * @private
         */
        this._node = node;
        Y_Node._instances[uid] = this;

        this._stateProxy = node; // when augmented with Attribute

        Y.EventTarget.call(this, {emitFacade:true});

        if (this._initPlugins) { // when augmented with Plugin.Host
            this._initPlugins();
        }

        this.SHOW_TRANSITION = Y_Node.SHOW_TRANSITION;
        this.HIDE_TRANSITION = Y_Node.HIDE_TRANSITION;
    },

    // used with previous/next/ancestor tests
    _wrapFn = function(fn) {
        var ret = null;
        if (fn) {
            ret = (typeof fn == 'string') ?
            function(n) {
                return Y.Selector.test(n, fn);
            } :
            function(n) {
                return fn(Y.one(n));
            };
        }

        return ret;
    };
// end "globals"

/**
 * The name of the component
 * @static
 * @property NAME
 */
Y_Node.NAME = 'node';

/*
 * The pattern used to identify ARIA attributes
 */
Y_Node.re_aria = /^(?:role$|aria-)/;

Y_Node.SHOW_TRANSITION = 'fadeIn';
Y_Node.HIDE_TRANSITION = 'fadeOut';

/**
 * List of events that route to DOM events
 * @static
 * @property DOM_EVENTS
 */

Y_Node.DOM_EVENTS = {
    abort: 1,
    beforeunload: 1,
    blur: 1,
    change: 1,
    click: 1,
    close: 1,
    command: 1,
    contextmenu: 1,
    dblclick: 1,
    DOMMouseScroll: 1,
    drag: 1,
    dragstart: 1,
    dragenter: 1,
    dragover: 1,
    dragleave: 1,
    dragend: 1,
    drop: 1,
    error: 1,
    focus: 1,
    key: 1,
    keydown: 1,
    keypress: 1,
    keyup: 1,
    load: 1,
    message: 1,
    mousedown: 1,
    mouseenter: 1,
    mouseleave: 1,
    mousemove: 1,
    mousemultiwheel: 1,
    mouseout: 1,
    mouseover: 1,
    mouseup: 1,
    mousewheel: 1,
    orientationchange: 1,
    reset: 1,
    resize: 1,
    select: 1,
    selectstart: 1,
    submit: 1,
    scroll: 1,
    textInput: 1,
    unload: 1
};

// Add custom event adaptors to this list.  This will make it so
// that delegate, key, available, contentready, etc all will
// be available through Node.on
Y.mix(Y_Node.DOM_EVENTS, Y.Env.evt.plugins);

/**
 * A list of Node instances that have been created
 * @private
 * @property _instances
 * @static
 *
 */
Y_Node._instances = {};

/**
 * Retrieves the DOM node bound to a Node instance
 * @method getDOMNode
 * @static
 *
 * @param {Y.Node || HTMLNode} node The Node instance or an HTMLNode
 * @return {HTMLNode} The DOM node bound to the Node instance.  If a DOM node is passed
 * as the node argument, it is simply returned.
 */
Y_Node.getDOMNode = function(node) {
    if (node) {
        return (node.nodeType) ? node : node._node || null;
    }
    return null;
};

/**
 * Checks Node return values and wraps DOM Nodes as Y.Node instances
 * and DOM Collections / Arrays as Y.NodeList instances.
 * Other return values just pass thru.  If undefined is returned (e.g. no return)
 * then the Node instance is returned for chainability.
 * @method scrubVal
 * @static
 *
 * @param {any} node The Node instance or an HTMLNode
 * @return {Y.Node | Y.NodeList | any} Depends on what is returned from the DOM node.
 */
Y_Node.scrubVal = function(val, node) {
    if (val) { // only truthy values are risky
         if (typeof val == 'object' || typeof val == 'function') { // safari nodeList === function
            if (NODE_TYPE in val || Y_DOM.isWindow(val)) {// node || window
                val = Y.one(val);
            } else if ((val.item && !val._nodes) || // dom collection or Node instance
                    (val[0] && val[0][NODE_TYPE])) { // array of DOM Nodes
                val = Y.all(val);
            }
        }
    } else if (typeof val === 'undefined') {
        val = node; // for chaining
    } else if (val === null) {
        val = null; // IE: DOM null not the same as null
    }

    return val;
};

/**
 * Adds methods to the Y.Node prototype, routing through scrubVal.
 * @method addMethod
 * @static
 *
 * @param {String} name The name of the method to add
 * @param {Function} fn The function that becomes the method
 * @param {Object} context An optional context to call the method with
 * (defaults to the Node instance)
 * @return {any} Depends on what is returned from the DOM node.
 */
Y_Node.addMethod = function(name, fn, context) {
    if (name && fn && typeof fn == 'function') {
        Y_Node.prototype[name] = function() {
            var args = _slice.call(arguments),
                node = this,
                ret;

            if (args[0] && Y.instanceOf(args[0], Y_Node)) {
                args[0] = args[0]._node;
            }

            if (args[1] && Y.instanceOf(args[1], Y_Node)) {
                args[1] = args[1]._node;
            }
            args.unshift(node._node);

            ret = fn.apply(node, args);

            if (ret) { // scrub truthy
                ret = Y_Node.scrubVal(ret, node);
            }

            (typeof ret != 'undefined') || (ret = node);
            return ret;
        };
    } else {
    }
};

/**
 * Imports utility methods to be added as Y.Node methods.
 * @method importMethod
 * @static
 *
 * @param {Object} host The object that contains the method to import.
 * @param {String} name The name of the method to import
 * @param {String} altName An optional name to use in place of the host name
 * @param {Object} context An optional context to call the method with
 */
Y_Node.importMethod = function(host, name, altName) {
    if (typeof name == 'string') {
        altName = altName || name;
        Y_Node.addMethod(altName, host[name], host);
    } else {
        Y.Array.each(name, function(n) {
            Y_Node.importMethod(host, n);
        });
    }
};

/**
 * Returns a single Node instance bound to the node or the
 * first element matching the given selector. Returns null if no match found.
 * <strong>Note:</strong> For chaining purposes you may want to
 * use <code>Y.all</code>, which returns a NodeList when no match is found.
 * @method Y.one
 * @static
 * @param {String | HTMLElement} node a node or Selector
 * @return {Y.Node | null} a Node instance or null if no match found.
 */
Y_Node.one = function(node) {
    var instance = null,
        cachedNode,
        uid;

    if (node) {
        if (typeof node == 'string') {
            if (node.indexOf('doc') === 0) { // doc OR document
                node = Y.config.doc;
            } else if (node.indexOf('win') === 0) { // win OR window
                node = Y.config.win;
            } else {
                node = Y.Selector.query(node, null, true);
            }
            if (!node) {
                return null;
            }
        } else if (Y.instanceOf(node, Y_Node)) {
            return node; // NOTE: return
        }

        if (node.nodeType || Y.DOM.isWindow(node)) { // avoid bad input (numbers, boolean, etc)
            uid = (node.uniqueID && node.nodeType !== 9) ? node.uniqueID : node._yuid;
            instance = Y_Node._instances[uid]; // reuse exising instances
            cachedNode = instance ? instance._node : null;
            if (!instance || (cachedNode && node !== cachedNode)) { // new Node when nodes don't match
                instance = new Y_Node(node);
            }
        }
    }
    return instance;
};

/**
 * Returns a new dom node using the provided markup string.
 * @method create
 * @static
 * @param {String} html The markup used to create the element
 * @param {HTMLDocument} doc An optional document context
 * @return {Node} A Node instance bound to a DOM node or fragment
 */
Y_Node.create = function(html, doc) {
    if (doc && doc._node) {
        doc = doc._node;
    }
    return Y.one(Y_DOM.create(html, doc));
};

/**
 * Static collection of configuration attributes for special handling
 * @property ATTRS
 * @static
 * @type object
 */
Y_Node.ATTRS = {
    /**
     * Allows for getting and setting the text of an element.
     * Formatting is preserved and special characters are treated literally.
     * @config text
     * @type String
     */
    text: {
        getter: function() {
            return Y_DOM.getText(this._node);
        },

        setter: function(content) {
            Y_DOM.setText(this._node, content);
            return content;
        }
    },

    'options': {
        getter: function() {
            return this._node.getElementsByTagName('option');
        }
    },

    /**
     * Returns a NodeList instance of all HTMLElement children.
     * @readOnly
     * @config children
     * @type NodeList
     */
    'children': {
        getter: function() {
            var node = this._node,
                children = node.children,
                childNodes, i, len;

            if (!children) {
                childNodes = node.childNodes;
                children = [];

                for (i = 0, len = childNodes.length; i < len; ++i) {
                    if (childNodes[i][TAG_NAME]) {
                        children[children.length] = childNodes[i];
                    }
                }
            }
            return Y.all(children);
        }
    },

    value: {
        getter: function() {
            return Y_DOM.getValue(this._node);
        },

        setter: function(val) {
            Y_DOM.setValue(this._node, val);
            return val;
        }
    }
};

/**
 * The default setter for DOM properties
 * Called with instance context (this === the Node instance)
 * @method DEFAULT_SETTER
 * @static
 * @param {String} name The attribute/property being set
 * @param {any} val The value to be set
 * @return {any} The value
 */
Y_Node.DEFAULT_SETTER = function(name, val) {
    var node = this._stateProxy,
        strPath;

    if (name.indexOf(DOT) > -1) {
        strPath = name;
        name = name.split(DOT);
        // only allow when defined on node
        Y.Object.setValue(node, name, val);
    } else if (typeof node[name] != 'undefined') { // pass thru DOM properties
        node[name] = val;
    }

    return val;
};

/**
 * The default getter for DOM properties
 * Called with instance context (this === the Node instance)
 * @method DEFAULT_GETTER
 * @static
 * @param {String} name The attribute/property to look up
 * @return {any} The current value
 */
Y_Node.DEFAULT_GETTER = function(name) {
    var node = this._stateProxy,
        val;

    if (name.indexOf && name.indexOf(DOT) > -1) {
        val = Y.Object.getValue(node, name.split(DOT));
    } else if (typeof node[name] != 'undefined') { // pass thru from DOM
        val = node[name];
    }

    return val;
};

// Basic prototype augment - no lazy constructor invocation.
Y.mix(Y_Node, Y.EventTarget, false, null, 1);

Y.mix(Y_Node.prototype, {
/**
 * The method called when outputting Node instances as strings
 * @method toString
 * @return {String} A string representation of the Node instance
 */
    toString: function() {
        var str = this[UID] + ': not bound to a node',
            node = this._node,
            attrs, id, className;

        if (node) {
            attrs = node.attributes;
            id = (attrs && attrs.id) ? node.getAttribute('id') : null;
            className = (attrs && attrs.className) ? node.getAttribute('className') : null;
            str = node[NODE_NAME];

            if (id) {
                str += '#' + id;
            }

            if (className) {
                str += '.' + className.replace(' ', '.');
            }

            // TODO: add yuid?
            str += ' ' + this[UID];
        }
        return str;
    },

    /**
     * Returns an attribute value on the Node instance.
     * Unless pre-configured (via Node.ATTRS), get hands
     * off to the underlying DOM node.  Only valid
     * attributes/properties for the node will be set.
     * @method get
     * @param {String} attr The attribute
     * @return {any} The current value of the attribute
     */
    get: function(attr) {
        var val;

        if (this._getAttr) { // use Attribute imple
            val = this._getAttr(attr);
        } else {
            val = this._get(attr);
        }

        if (val) {
            val = Y_Node.scrubVal(val, this);
        } else if (val === null) {
            val = null; // IE: DOM null is not true null (even though they ===)
        }
        return val;
    },

    /**
     * Helper method for get.
     * @method _get
     * @private
     * @param {String} attr The attribute
     * @return {any} The current value of the attribute
     */
    _get: function(attr) {
        var attrConfig = Y_Node.ATTRS[attr],
            val;

        if (attrConfig && attrConfig.getter) {
            val = attrConfig.getter.call(this);
        } else if (Y_Node.re_aria.test(attr)) {
            val = this._node.getAttribute(attr, 2);
        } else {
            val = Y_Node.DEFAULT_GETTER.apply(this, arguments);
        }

        return val;
    },

    /**
     * Sets an attribute on the Node instance.
     * Unless pre-configured (via Node.ATTRS), set hands
     * off to the underlying DOM node.  Only valid
     * attributes/properties for the node will be set.
     * To set custom attributes use setAttribute.
     * @method set
     * @param {String} attr The attribute to be set.
     * @param {any} val The value to set the attribute to.
     * @chainable
     */
    set: function(attr, val) {
        var attrConfig = Y_Node.ATTRS[attr];

        if (this._setAttr) { // use Attribute imple
            this._setAttr.apply(this, arguments);
        } else { // use setters inline
            if (attrConfig && attrConfig.setter) {
                attrConfig.setter.call(this, val, attr);
            } else if (Y_Node.re_aria.test(attr)) { // special case Aria
                this._node.setAttribute(attr, val);
            } else {
                Y_Node.DEFAULT_SETTER.apply(this, arguments);
            }
        }

        return this;
    },

    /**
     * Sets multiple attributes.
     * @method setAttrs
     * @param {Object} attrMap an object of name/value pairs to set
     * @chainable
     */
    setAttrs: function(attrMap) {
        if (this._setAttrs) { // use Attribute imple
            this._setAttrs(attrMap);
        } else { // use setters inline
            Y.Object.each(attrMap, function(v, n) {
                this.set(n, v);
            }, this);
        }

        return this;
    },

    /**
     * Returns an object containing the values for the requested attributes.
     * @method getAttrs
     * @param {Array} attrs an array of attributes to get values
     * @return {Object} An object with attribute name/value pairs.
     */
    getAttrs: function(attrs) {
        var ret = {};
        if (this._getAttrs) { // use Attribute imple
            this._getAttrs(attrs);
        } else { // use setters inline
            Y.Array.each(attrs, function(v, n) {
                ret[v] = this.get(v);
            }, this);
        }

        return ret;
    },

    /**
     * Creates a new Node using the provided markup string.
     * @method create
     * @param {String} html The markup used to create the element
     * @param {HTMLDocument} doc An optional document context
     * @return {Node} A Node instance bound to a DOM node or fragment
     */
    create: Y_Node.create,

    /**
     * Compares nodes to determine if they match.
     * Node instances can be compared to each other and/or HTMLElements.
     * @method compareTo
     * @param {HTMLElement | Node} refNode The reference node to compare to the node.
     * @return {Boolean} True if the nodes match, false if they do not.
     */
    compareTo: function(refNode) {
        var node = this._node;

        if (Y.instanceOf(refNode, Y_Node)) {
            refNode = refNode._node;
        }
        return node === refNode;
    },

    /**
     * Determines whether the node is appended to the document.
     * @method inDoc
     * @param {Node|HTMLElement} doc optional An optional document to check against.
     * Defaults to current document.
     * @return {Boolean} Whether or not this node is appended to the document.
     */
    inDoc: function(doc) {
        var node = this._node;
        doc = (doc) ? doc._node || doc : node[OWNER_DOCUMENT];
        if (doc.documentElement) {
            return Y_DOM.contains(doc.documentElement, node);
        }
    },

    getById: function(id) {
        var node = this._node,
            ret = Y_DOM.byId(id, node[OWNER_DOCUMENT]);
        if (ret && Y_DOM.contains(node, ret)) {
            ret = Y.one(ret);
        } else {
            ret = null;
        }
        return ret;
    },

   /**
     * Returns the nearest ancestor that passes the test applied by supplied boolean method.
     * @method ancestor
     * @param {String | Function} fn A selector string or boolean method for testing elements.
     * @param {Boolean} testSelf optional Whether or not to include the element in the scan
     * If a function is used, it receives the current node being tested as the only argument.
     * @return {Node} The matching Node instance or null if not found
     */
    ancestor: function(fn, testSelf) {
        return Y.one(Y_DOM.ancestor(this._node, _wrapFn(fn), testSelf));
    },

   /**
     * Returns the ancestors that pass the test applied by supplied boolean method.
     * @method ancestors
     * @param {String | Function} fn A selector string or boolean method for testing elements.
     * @param {Boolean} testSelf optional Whether or not to include the element in the scan
     * If a function is used, it receives the current node being tested as the only argument.
     * @return {NodeList} A NodeList instance containing the matching elements 
     */
    ancestors: function(fn, testSelf) {
        return Y.all(Y_DOM.ancestors(this._node, _wrapFn(fn), testSelf));
    },

    /**
     * Returns the previous matching sibling.
     * Returns the nearest element node sibling if no method provided.
     * @method previous
     * @param {String | Function} fn A selector or boolean method for testing elements.
     * If a function is used, it receives the current node being tested as the only argument.
     * @return {Node} Node instance or null if not found
     */
    previous: function(fn, all) {
        return Y.one(Y_DOM.elementByAxis(this._node, 'previousSibling', _wrapFn(fn), all));
    },

    /**
     * Returns the next matching sibling.
     * Returns the nearest element node sibling if no method provided.
     * @method next
     * @param {String | Function} fn A selector or boolean method for testing elements.
     * If a function is used, it receives the current node being tested as the only argument.
     * @return {Node} Node instance or null if not found
     */
    next: function(fn, all) {
        return Y.one(Y_DOM.elementByAxis(this._node, 'nextSibling', _wrapFn(fn), all));
    },

    /**
     * Returns all matching siblings.
     * Returns all siblings if no method provided.
     * @method siblings
     * @param {String | Function} fn A selector or boolean method for testing elements.
     * If a function is used, it receives the current node being tested as the only argument.
     * @return {NodeList} NodeList instance bound to found siblings
     */
    siblings: function(fn) {
        return Y.all(Y_DOM.siblings(this._node, _wrapFn(fn)));
    },

    /**
     * Retrieves a Node instance of nodes based on the given CSS selector.
     * @method one
     *
     * @param {string} selector The CSS selector to test against.
     * @return {Node} A Node instance for the matching HTMLElement.
     */
    one: function(selector) {
        return Y.one(Y.Selector.query(selector, this._node, true));
    },

    /**
     * Retrieves a nodeList based on the given CSS selector.
     * @method all
     *
     * @param {string} selector The CSS selector to test against.
     * @return {NodeList} A NodeList instance for the matching HTMLCollection/Array.
     */
    all: function(selector) {
        var nodelist = Y.all(Y.Selector.query(selector, this._node));
        nodelist._query = selector;
        nodelist._queryRoot = this._node;
        return nodelist;
    },

    // TODO: allow fn test
    /**
     * Test if the supplied node matches the supplied selector.
     * @method test
     *
     * @param {string} selector The CSS selector to test against.
     * @return {boolean} Whether or not the node matches the selector.
     */
    test: function(selector) {
        return Y.Selector.test(this._node, selector);
    },

    /**
     * Removes the node from its parent.
     * Shortcut for myNode.get('parentNode').removeChild(myNode);
     * @method remove
     * @param {Boolean} destroy whether or not to call destroy() on the node
     * after removal.
     * @chainable
     *
     */
    remove: function(destroy) {
        var node = this._node,
            parentNode = node.parentNode;

        if (parentNode) {
            parentNode.removeChild(node);
        }

        if (destroy) {
            this.destroy();
        }

        return this;
    },

    /**
     * Replace the node with the other node. This is a DOM update only
     * and does not change the node bound to the Node instance.
     * Shortcut for myNode.get('parentNode').replaceChild(newNode, myNode);
     * @method replace
     * @param {Y.Node || HTMLNode} newNode Node to be inserted
     * @chainable
     *
     */
    replace: function(newNode) {
        var node = this._node;
        if (typeof newNode == 'string') {
            newNode = Y_Node.create(newNode);
        }
        node.parentNode.replaceChild(Y_Node.getDOMNode(newNode), node);
        return this;
    },

    /**
     * @method replaceChild
     * @for Node
     * @param {String | HTMLElement | Node} node Node to be inserted 
     * @param {HTMLElement | Node} refNode Node to be replaced 
     * @return {Node} The replaced node
     */
    replaceChild: function(node, refNode) {
        if (typeof node == 'string') {
            node = Y_DOM.create(node);
        }

        return Y.one(this._node.replaceChild(Y_Node.getDOMNode(node), Y_Node.getDOMNode(refNode)));
    },

    /**
     * @method appendChild
     * @param {String | HTMLElement | Node} node Node to be appended 
     * @return {Node} The appended node 
     */
    appendChild: function(node) {
        return Y_Node.scrubVal(this._insert(node));
    },

    /**
     * @method insertBefore
     * @param {String | HTMLElement | Node} newNode Node to be appended 
     * @param {HTMLElement | Node} refNode Node to be inserted before 
     * @return {Node} The inserted node 
     */
    insertBefore: function(newNode, refNode) {
        return Y.Node.scrubVal(this._insert(newNode, refNode));
    },

    /**
     * Removes event listeners from the node and (optionally) its subtree
     * @method purge
     * @param {Boolean} recurse (optional) Whether or not to remove listeners from the
     * node's subtree
     * @param {String} type (optional) Only remove listeners of the specified type
     * @chainable
     *
     */
    purge: function(recurse, type) {
        Y.Event.purgeElement(this._node, recurse, type);
        return this;
    },

    /**
     * Nulls internal node references, removes any plugins and event listeners
     * @method destroy
     * @param {Boolean} recursivePurge (optional) Whether or not to remove listeners from the
     * node's subtree (default is false)
     *
     */
    destroy: function(recursive) {
        this.purge(); // TODO: only remove events add via this Node

        if (this.unplug) { // may not be a PluginHost
            this.unplug();
        }

        this.clearData();

        if (recursive) {
            this.all('*').destroy();
        }

        this._node = null;
        this._stateProxy = null;

        delete Y_Node._instances[this[UID]];
    },

    /**
     * Invokes a method on the Node instance
     * @method invoke
     * @param {String} method The name of the method to invoke
     * @param {Any}  a, b, c, etc. Arguments to invoke the method with.
     * @return Whatever the underly method returns.
     * DOM Nodes and Collections return values
     * are converted to Node/NodeList instances.
     *
     */
    invoke: function(method, a, b, c, d, e) {
        var node = this._node,
            ret;

        if (a && Y.instanceOf(a, Y_Node)) {
            a = a._node;
        }

        if (b && Y.instanceOf(b, Y_Node)) {
            b = b._node;
        }

        ret = node[method](a, b, c, d, e);
        return Y_Node.scrubVal(ret, this);
    },

    /**
     * Inserts the content before the reference node.
     * @method insert
     * @param {String | Y.Node | HTMLElement | Y.NodeList | HTMLCollection} content The content to insert
     * @param {Int | Y.Node | HTMLElement | String} where The position to insert at.
     * Possible "where" arguments
     * <dl>
     * <dt>Y.Node</dt>
     * <dd>The Node to insert before</dd>
     * <dt>HTMLElement</dt>
     * <dd>The element to insert before</dd>
     * <dt>Int</dt>
     * <dd>The index of the child element to insert before</dd>
     * <dt>"replace"</dt>
     * <dd>Replaces the existing HTML</dd>
     * <dt>"before"</dt>
     * <dd>Inserts before the existing HTML</dd>
     * <dt>"before"</dt>
     * <dd>Inserts content before the node</dd>
     * <dt>"after"</dt>
     * <dd>Inserts content after the node</dd>
     * </dl>
     * @chainable
     */
    insert: function(content, where) {
        this._insert(content, where);
        return this;
    },

    _insert: function(content, where) {
        var node = this._node,
            ret = null;

        if (typeof where == 'number') { // allow index
            where = this._node.childNodes[where];
        } else if (where && where._node) { // Node
            where = where._node;
        }

        if (content && typeof content != 'string') { // allow Node or NodeList/Array instances
            content = content._node || content._nodes || content;
        }
        ret = Y_DOM.addHTML(node, content, where);

        return ret;
    },

    /**
     * Inserts the content as the firstChild of the node.
     * @method prepend
     * @param {String | Y.Node | HTMLElement} content The content to insert
     * @chainable
     */
    prepend: function(content) {
        return this.insert(content, 0);
    },

    /**
     * Inserts the content as the lastChild of the node.
     * @method append
     * @param {String | Y.Node | HTMLElement} content The content to insert
     * @chainable
     */
    append: function(content) {
        return this.insert(content, null);
    },

    /**
     * Appends the node to the given node. 
     * @method appendTo
     * @param {Y.Node | HTMLElement} node The node to append to
     * @chainable
     */
    appendTo: function(node) {
        Y.one(node).append(this);
        return this;
    },

    /**
     * Replaces the node's current content with the content.
     * @method setContent
     * @param {String | Y.Node | HTMLElement | Y.NodeList | HTMLCollection} content The content to insert
     * @chainable
     */
    setContent: function(content) {
        this._insert(content, 'replace');
        return this;
    },

    /**
     * Returns the node's current content (e.g. innerHTML) 
     * @method getContent
     * @return {String} The current content
     */
    getContent: function(content) {
        return this.get('innerHTML');
    },

    /**
    * @method swap
    * @description Swap DOM locations with the given node.
    * This does not change which DOM node each Node instance refers to.
    * @param {Node} otherNode The node to swap with
     * @chainable
    */
    swap: Y.config.doc.documentElement.swapNode ?
        function(otherNode) {
            this._node.swapNode(Y_Node.getDOMNode(otherNode));
        } :
        function(otherNode) {
            otherNode = Y_Node.getDOMNode(otherNode);
            var node = this._node,
                parent = otherNode.parentNode,
                nextSibling = otherNode.nextSibling;

            if (nextSibling === node) {
                parent.insertBefore(node, otherNode);
            } else if (otherNode === node.nextSibling) {
                parent.insertBefore(otherNode, node);
            } else {
                node.parentNode.replaceChild(otherNode, node);
                Y_DOM.addHTML(parent, node, nextSibling);
            }
            return this;
        },


    /**
    * @method getData
    * @description Retrieves arbitrary data stored on a Node instance.
    * This is not stored with the DOM node.
    * @param {string} name Optional name of the data field to retrieve.
    * If no name is given, all data is returned.
    * @return {any | Object} Whatever is stored at the given field,
    * or an object hash of all fields.
    */
    getData: function(name) {
        var ret;
        this._data = this._data || {};
        if (arguments.length) {
            ret = this._data[name];
        } else {
            ret = this._data;
        }

        return ret;

    },

    /**
    * @method setData
    * @description Stores arbitrary data on a Node instance.
    * This is not stored with the DOM node.
    * @param {string} name The name of the field to set. If no name
    * is given, name is treated as the data and overrides any existing data.
    * @param {any} val The value to be assigned to the field.
    * @chainable
    */
    setData: function(name, val) {
        this._data = this._data || {};
        if (arguments.length > 1) {
            this._data[name] = val;
        } else {
            this._data = name;
        }

       return this;
    },

    /**
    * @method clearData
    * @description Clears stored data.
    * @param {string} name The name of the field to clear. If no name
    * is given, all data is cleared.
    * @chainable
    */
    clearData: function(name) {
        if ('_data' in this) {
            if (name) {
                delete this._data[name];
            } else {
                delete this._data;
            }
        }

        return this;
    },

    hasMethod: function(method) {
        var node = this._node;
        return !!(node && method in node &&
                typeof node[method] != 'unknown' &&
            (typeof node[method] == 'function' ||
                String(node[method]).indexOf('function') === 1)); // IE reports as object, prepends space
    },

    SHOW_TRANSITION: null,
    HIDE_TRANSITION: null,

    /**
     * Makes the node visible.
     * If the "transition" module is loaded, show optionally
     * animates the showing of the node using either the default
     * transition effect ('fadeIn'), or the given named effect.
     * @method show
     * @param {String} name A named Transition effect to use as the show effect. 
     * @param {Object} config Options to use with the transition. 
     * @param {Function} callback An optional function to run after the transition completes. 
     * @chainable
     */
    show: function(callback) {
        callback = arguments[arguments.length - 1];
        this.toggleView(true, callback);
        return this;
    },

    /**
     * The implementation for showing nodes.
     * Default is to toggle the style.display property.
     * @protected
     * @chainable
     */
    _show: function() {
        this.setStyle('display', '');

    },

    _isHidden: function() {
        return Y.DOM.getStyle(this._node, 'display') === 'none';
    },

    toggleView: function(on, callback) {
        this._toggleView.apply(this, arguments);
    },

    _toggleView: function(on, callback) {
        callback = arguments[arguments.length - 1];

        // base on current state if not forcing 
        if (typeof on != 'boolean') {
            on = (this._isHidden()) ? 1 : 0;
        }

        if (on) {
            this._show();
        }  else {
            this._hide();
        }

        if (typeof callback == 'function') {
            callback.call(this);
        }

        return this;
    },

    /**
     * Hides the node.
     * If the "transition" module is loaded, hide optionally
     * animates the hiding of the node using either the default
     * transition effect ('fadeOut'), or the given named effect.
     * @method hide
     * @param {String} name A named Transition effect to use as the show effect. 
     * @param {Object} config Options to use with the transition. 
     * @param {Function} callback An optional function to run after the transition completes. 
     * @chainable
     */
    hide: function(callback) {
        callback = arguments[arguments.length - 1];
        this.toggleView(false, callback);
        return this;
    },

    /**
     * The implementation for hiding nodes.
     * Default is to toggle the style.display property.
     * @protected
     * @chainable
     */
    _hide: function() {
        this.setStyle('display', 'none');
    },

    isFragment: function() {
        return (this.get('nodeType') === 11);
    },

    /**
     * Removes all of the child nodes from the node.
     * @param {Boolean} destroy Whether the nodes should also be destroyed. 
     * @chainable
     */
    empty: function(destroy) {
        this.get('childNodes').remove(destroy);
        return this;
    }

}, true);

Y.Node = Y_Node;
Y.one = Y.Node.one;
/**
 * The NodeList module provides support for managing collections of Nodes.
 * @module node
 * @submodule nodelist
 */

/**
 * The NodeList class provides a wrapper for manipulating DOM NodeLists.
 * NodeList properties can be accessed via the set/get methods.
 * Use Y.all() to retrieve NodeList instances.
 *
 * @class NodeList
 * @constructor
 */

var NodeList = function(nodes) {
    var tmp = [];
    if (typeof nodes === 'string') { // selector query
        this._query = nodes;
        nodes = Y.Selector.query(nodes);
    } else if (nodes.nodeType || Y_DOM.isWindow(nodes)) { // domNode || window
        nodes = [nodes];
    } else if (Y.instanceOf(nodes, Y.Node)) {
        nodes = [nodes._node];
    } else if (Y.instanceOf(nodes[0], Y.Node)) { // allow array of Y.Nodes
        Y.Array.each(nodes, function(node) {
            if (node._node) {
                tmp.push(node._node);
            }
        });
        nodes = tmp;
    } else { // array of domNodes or domNodeList (no mixed array of Y.Node/domNodes)
        nodes = Y.Array(nodes, 0, true);
    }

    /**
     * The underlying array of DOM nodes bound to the Y.NodeList instance
     * @property _nodes
     * @private
     */
    this._nodes = nodes;
};

NodeList.NAME = 'NodeList';

/**
 * Retrieves the DOM nodes bound to a NodeList instance
 * @method NodeList.getDOMNodes
 * @static
 *
 * @param {Y.NodeList} nodelist The NodeList instance
 * @return {Array} The array of DOM nodes bound to the NodeList
 */
NodeList.getDOMNodes = function(nodelist) {
    return (nodelist && nodelist._nodes) ? nodelist._nodes : nodelist;
};

NodeList.each = function(instance, fn, context) {
    var nodes = instance._nodes;
    if (nodes && nodes.length) {
        Y.Array.each(nodes, fn, context || instance);
    } else {
    }
};

NodeList.addMethod = function(name, fn, context) {
    if (name && fn) {
        NodeList.prototype[name] = function() {
            var ret = [],
                args = arguments;

            Y.Array.each(this._nodes, function(node) {
                var UID = (node.uniqueID && node.nodeType !== 9 ) ? 'uniqueID' : '_yuid',
                    instance = Y.Node._instances[node[UID]],
                    ctx,
                    result;

                if (!instance) {
                    instance = NodeList._getTempNode(node);
                }
                ctx = context || instance;
                result = fn.apply(ctx, args);
                if (result !== undefined && result !== instance) {
                    ret[ret.length] = result;
                }
            });

            // TODO: remove tmp pointer
            return ret.length ? ret : this;
        };
    } else {
    }
};

NodeList.importMethod = function(host, name, altName) {
    if (typeof name === 'string') {
        altName = altName || name;
        NodeList.addMethod(name, host[name]);
    } else {
        Y.Array.each(name, function(n) {
            NodeList.importMethod(host, n);
        });
    }
};

NodeList._getTempNode = function(node) {
    var tmp = NodeList._tempNode;
    if (!tmp) {
        tmp = Y.Node.create('<div></div>');
        NodeList._tempNode = tmp;
    }

    tmp._node = node;
    tmp._stateProxy = node;
    return tmp;
};

Y.mix(NodeList.prototype, {
    /**
     * Retrieves the Node instance at the given index.
     * @method item
     *
     * @param {Number} index The index of the target Node.
     * @return {Node} The Node instance at the given index.
     */
    item: function(index) {
        return Y.one((this._nodes || [])[index]);
    },

    /**
     * Applies the given function to each Node in the NodeList.
     * @method each
     * @param {Function} fn The function to apply. It receives 3 arguments:
     * the current node instance, the node's index, and the NodeList instance
     * @param {Object} context optional An optional context to apply the function with
     * Default context is the current Node instance
     * @chainable
     */
    each: function(fn, context) {
        var instance = this;
        Y.Array.each(this._nodes, function(node, index) {
            node = Y.one(node);
            return fn.call(context || node, node, index, instance);
        });
        return instance;
    },

    batch: function(fn, context) {
        var nodelist = this;

        Y.Array.each(this._nodes, function(node, index) {
            var instance = Y.Node._instances[node[UID]];
            if (!instance) {
                instance = NodeList._getTempNode(node);
            }

            return fn.call(context || instance, instance, index, nodelist);
        });
        return nodelist;
    },

    /**
     * Executes the function once for each node until a true value is returned.
     * @method some
     * @param {Function} fn The function to apply. It receives 3 arguments:
     * the current node instance, the node's index, and the NodeList instance
     * @param {Object} context optional An optional context to execute the function from.
     * Default context is the current Node instance
     * @return {Boolean} Whether or not the function returned true for any node.
     */
    some: function(fn, context) {
        var instance = this;
        return Y.Array.some(this._nodes, function(node, index) {
            node = Y.one(node);
            context = context || node;
            return fn.call(context, node, index, instance);
        });
    },

    /**
     * Creates a documenFragment from the nodes bound to the NodeList instance
     * @method toFrag
     * @return Node a Node instance bound to the documentFragment
     */
    toFrag: function() {
        return Y.one(Y.DOM._nl2frag(this._nodes));
    },

    /**
     * Returns the index of the node in the NodeList instance
     * or -1 if the node isn't found.
     * @method indexOf
     * @param {Y.Node || DOMNode} node the node to search for
     * @return {Int} the index of the node value or -1 if not found
     */
    indexOf: function(node) {
        return Y.Array.indexOf(this._nodes, Y.Node.getDOMNode(node));
    },

    /**
     * Filters the NodeList instance down to only nodes matching the given selector.
     * @method filter
     * @param {String} selector The selector to filter against
     * @return {NodeList} NodeList containing the updated collection
     * @see Selector
     */
    filter: function(selector) {
        return Y.all(Y.Selector.filter(this._nodes, selector));
    },


    /**
     * Creates a new NodeList containing all nodes at every n indices, where
     * remainder n % index equals r.
     * (zero-based index).
     * @method modulus
     * @param {Int} n The offset to use (return every nth node)
     * @param {Int} r An optional remainder to use with the modulus operation (defaults to zero)
     * @return {NodeList} NodeList containing the updated collection
     */
    modulus: function(n, r) {
        r = r || 0;
        var nodes = [];
        NodeList.each(this, function(node, i) {
            if (i % n === r) {
                nodes.push(node);
            }
        });

        return Y.all(nodes);
    },

    /**
     * Creates a new NodeList containing all nodes at odd indices
     * (zero-based index).
     * @method odd
     * @return {NodeList} NodeList containing the updated collection
     */
    odd: function() {
        return this.modulus(2, 1);
    },

    /**
     * Creates a new NodeList containing all nodes at even indices
     * (zero-based index), including zero.
     * @method even
     * @return {NodeList} NodeList containing the updated collection
     */
    even: function() {
        return this.modulus(2);
    },

    destructor: function() {
    },

    /**
     * Reruns the initial query, when created using a selector query
     * @method refresh
     * @chainable
     */
    refresh: function() {
        var doc,
            nodes = this._nodes,
            query = this._query,
            root = this._queryRoot;

        if (query) {
            if (!root) {
                if (nodes && nodes[0] && nodes[0].ownerDocument) {
                    root = nodes[0].ownerDocument;
                }
            }

            this._nodes = Y.Selector.query(query, root);
        }

        return this;
    },

    _prepEvtArgs: function(type, fn, context) {
        // map to Y.on/after signature (type, fn, nodes, context, arg1, arg2, etc)
        var args = Y.Array(arguments, 0, true);

        if (args.length < 2) { // type only (event hash) just add nodes
            args[2] = this._nodes;
        } else {
            args.splice(2, 0, this._nodes);
        }

        args[3] = context || this; // default to NodeList instance as context

        return args;
    },

    /**
     * Applies an event listener to each Node bound to the NodeList.
     * @method on
     * @param {String} type The event being listened for
     * @param {Function} fn The handler to call when the event fires
     * @param {Object} context The context to call the handler with.
     * Default is the NodeList instance.
     * @param {Object} context The context to call the handler with.
     * param {mixed} arg* 0..n additional arguments to supply to the subscriber
     * when the event fires.
     * @return {Object} Returns an event handle that can later be use to detach().
     * @see Event.on
     */
    on: function(type, fn, context) {
        return Y.on.apply(Y, this._prepEvtArgs.apply(this, arguments));
    },

    /**
     * Applies an one-time event listener to each Node bound to the NodeList.
     * @method once
     * @param {String} type The event being listened for
     * @param {Function} fn The handler to call when the event fires
     * @param {Object} context The context to call the handler with.
     * Default is the NodeList instance.
     * @return {Object} Returns an event handle that can later be use to detach().
     * @see Event.on
     */
    once: function(type, fn, context) {
        return Y.once.apply(Y, this._prepEvtArgs.apply(this, arguments));
    },

    /**
     * Applies an event listener to each Node bound to the NodeList.
     * The handler is called only after all on() handlers are called
     * and the event is not prevented.
     * @method after
     * @param {String} type The event being listened for
     * @param {Function} fn The handler to call when the event fires
     * @param {Object} context The context to call the handler with.
     * Default is the NodeList instance.
     * @return {Object} Returns an event handle that can later be use to detach().
     * @see Event.on
     */
    after: function(type, fn, context) {
        return Y.after.apply(Y, this._prepEvtArgs.apply(this, arguments));
    },

    /**
     * Returns the current number of items in the NodeList.
     * @method size
     * @return {Int} The number of items in the NodeList.
     */
    size: function() {
        return this._nodes.length;
    },

    /**
     * Determines if the instance is bound to any nodes
     * @method isEmpty
     * @return {Boolean} Whether or not the NodeList is bound to any nodes
     */
    isEmpty: function() {
        return this._nodes.length < 1;
    },

    toString: function() {
        var str = '',
            errorMsg = this[UID] + ': not bound to any nodes',
            nodes = this._nodes,
            node;

        if (nodes && nodes[0]) {
            node = nodes[0];
            str += node[NODE_NAME];
            if (node.id) {
                str += '#' + node.id;
            }

            if (node.className) {
                str += '.' + node.className.replace(' ', '.');
            }

            if (nodes.length > 1) {
                str += '...[' + nodes.length + ' items]';
            }
        }
        return str || errorMsg;
    }

}, true);

NodeList.importMethod(Y.Node.prototype, [
    /**
     * Called on each Node instance
     * @for NodeList
     * @method append
     * @see Node.append
     */
    'append',

    /** Called on each Node instance
      * @method destroy
      * @see Node.destroy
      */
    'destroy',

    /**
      * Called on each Node instance
      * @method detach
      * @see Node.detach
      */
    'detach',

    /** Called on each Node instance
      * @method detachAll
      * @see Node.detachAll
      */
    'detachAll',

    /** Called on each Node instance
      * @method empty
      * @see Node.empty
      */
    'empty',

    /** Called on each Node instance
      * @method insert
      * @see Node.insert
      */
    'insert',

    /** Called on each Node instance
      * @method prepend
      * @see Node.prepend
      */
    'prepend',

    /** Called on each Node instance
      * @method remove
      * @see Node.remove
      */
    'remove',

    /** Called on each Node instance
      * @method set
      * @see Node.set
      */
    'set',

    /** Called on each Node instance
      * @method setContent
      * @see Node.setContent
      */
    'setContent',

    /**
     * Makes each node visible.
     * If the "transition" module is loaded, show optionally
     * animates the showing of the node using either the default
     * transition effect ('fadeIn'), or the given named effect.
     * @method show
     * @param {String} name A named Transition effect to use as the show effect. 
     * @param {Object} config Options to use with the transition. 
     * @param {Function} callback An optional function to run after the transition completes. 
     * @chainable
     */
    'show',

    /**
     * Hides each node.
     * If the "transition" module is loaded, hide optionally
     * animates the hiding of the node using either the default
     * transition effect ('fadeOut'), or the given named effect.
     * @method hide
     * @param {String} name A named Transition effect to use as the show effect. 
     * @param {Object} config Options to use with the transition. 
     * @param {Function} callback An optional function to run after the transition completes. 
     * @chainable
     */
    'hide',

    'toggleView'
]);

// one-off implementation to convert array of Nodes to NodeList
// e.g. Y.all('input').get('parentNode');

/** Called on each Node instance
  * @method get
  * @see Node
  */
NodeList.prototype.get = function(attr) {
    var ret = [],
        nodes = this._nodes,
        isNodeList = false,
        getTemp = NodeList._getTempNode,
        instance,
        val;

    if (nodes[0]) {
        instance = Y.Node._instances[nodes[0]._yuid] || getTemp(nodes[0]);
        val = instance._get(attr);
        if (val && val.nodeType) {
            isNodeList = true;
        }
    }

    Y.Array.each(nodes, function(node) {
        instance = Y.Node._instances[node._yuid];

        if (!instance) {
            instance = getTemp(node);
        }

        val = instance._get(attr);
        if (!isNodeList) { // convert array of Nodes to NodeList
            val = Y.Node.scrubVal(val, instance);
        }

        ret.push(val);
    });

    return (isNodeList) ? Y.all(ret) : ret;
};

Y.NodeList = NodeList;

Y.all = function(nodes) {
    return new NodeList(nodes);
};

Y.Node.all = Y.all;
Y.Array.each([
    /**
     * Passes through to DOM method.
     * @for Node
     * @method removeChild
     * @param {HTMLElement | Node} node Node to be removed 
     * @return {Node} The removed node 
     */
    'removeChild',

    /**
     * Passes through to DOM method.
     * @method hasChildNodes
     * @return {Boolean} Whether or not the node has any childNodes 
     */
    'hasChildNodes',

    /**
     * Passes through to DOM method.
     * @method cloneNode
     * @param {Boolean} deep Whether or not to perform a deep clone, which includes
     * subtree and attributes
     * @return {Node} The clone 
     */
    'cloneNode',

    /**
     * Passes through to DOM method.
     * @method hasAttribute
     * @param {String} attribute The attribute to test for 
     * @return {Boolean} Whether or not the attribute is present 
     */
    'hasAttribute',

    /**
     * Passes through to DOM method.
     * @method removeAttribute
     * @param {String} attribute The attribute to be removed 
     * @chainable
     */
    'removeAttribute',

    /**
     * Passes through to DOM method.
     * @method scrollIntoView
     * @chainable
     */
    'scrollIntoView',

    /**
     * Passes through to DOM method.
     * @method getElementsByTagName
     * @param {String} tagName The tagName to collect 
     * @return {NodeList} A NodeList representing the HTMLCollection
     */
    'getElementsByTagName',

    /**
     * Passes through to DOM method.
     * @method focus
     * @chainable
     */
    'focus',

    /**
     * Passes through to DOM method.
     * @method blur
     * @chainable
     */
    'blur',

    /**
     * Passes through to DOM method.
     * Only valid on FORM elements
     * @method submit
     * @chainable
     */
    'submit',

    /**
     * Passes through to DOM method.
     * Only valid on FORM elements
     * @method reset
     * @chainable
     */
    'reset',

    /**
     * Passes through to DOM method.
     * @method select
     * @chainable
     */
     'select',

    /**
     * Passes through to DOM method.
     * Only valid on TABLE elements
     * @method createCaption
     * @chainable
     */
    'createCaption'

], function(method) {
    Y.Node.prototype[method] = function(arg1, arg2, arg3) {
        var ret = this.invoke(method, arg1, arg2, arg3);
        return ret;
    };
});

Y.Node.importMethod(Y.DOM, [
    /**
     * Determines whether the node is an ancestor of another HTML element in the DOM hierarchy.
     * @method contains
     * @param {Node | HTMLElement} needle The possible node or descendent
     * @return {Boolean} Whether or not this node is the needle its ancestor
     */
    'contains',
    /**
     * Allows setting attributes on DOM nodes, normalizing in some cases.
     * This passes through to the DOM node, allowing for custom attributes.
     * @method setAttribute
     * @for Node
     * @for NodeList
     * @chainable
     * @param {string} name The attribute name 
     * @param {string} value The value to set
     */
    'setAttribute',
    /**
     * Allows getting attributes on DOM nodes, normalizing in some cases.
     * This passes through to the DOM node, allowing for custom attributes.
     * @method getAttribute
     * @for Node
     * @for NodeList
     * @param {string} name The attribute name 
     * @return {string} The attribute value 
     */
    'getAttribute',

    /**
     * Wraps the given HTML around the node.
     * @method wrap
     * @param {String} html The markup to wrap around the node. 
     * @chainable
     */
    'wrap',

    /**
     * Removes the node's parent node. 
     * @method unwrap
     * @chainable
     */
    'unwrap',

    /**
     * Applies a unique ID to the node if none exists
     * @method generateID
     * @return {String} The existing or generated ID
     */
    'generateID'
]);

Y.NodeList.importMethod(Y.Node.prototype, [
/**
 * Allows getting attributes on DOM nodes, normalizing in some cases.
 * This passes through to the DOM node, allowing for custom attributes.
 * @method getAttribute
 * @see Node
 * @for NodeList
 * @param {string} name The attribute name 
 * @return {string} The attribute value 
 */

    'getAttribute',
/**
 * Allows setting attributes on DOM nodes, normalizing in some cases.
 * This passes through to the DOM node, allowing for custom attributes.
 * @method setAttribute
 * @see Node
 * @for NodeList
 * @chainable
 * @param {string} name The attribute name 
 * @param {string} value The value to set
 */
    'setAttribute',
 
/**
 * Allows for removing attributes on DOM nodes.
 * This passes through to the DOM node, allowing for custom attributes.
 * @method removeAttribute
 * @see Node
 * @for NodeList
 * @param {string} name The attribute to remove 
 */
    'removeAttribute',
/**
 * Removes the parent node from node in the list. 
 * @method unwrap
 * @chainable
 */
    'unwrap',
/**
 * Wraps the given HTML around each node.
 * @method wrap
 * @param {String} html The markup to wrap around the node. 
 * @chainable
 */
    'wrap',

/**
 * Applies a unique ID to each node if none exists
 * @method generateID
 * @return {String} The existing or generated ID
 */
    'generateID'
]);
(function(Y) {
    var methods = [
    /**
     * Determines whether each node has the given className.
     * @method hasClass
     * @for Node
     * @param {String} className the class name to search for
     * @return {Boolean} Whether or not the element has the specified class 
     */
     'hasClass',

    /**
     * Adds a class name to each node.
     * @method addClass         
     * @param {String} className the class name to add to the node's class attribute
     * @chainable
     */
     'addClass',

    /**
     * Removes a class name from each node.
     * @method removeClass         
     * @param {String} className the class name to remove from the node's class attribute
     * @chainable
     */
     'removeClass',

    /**
     * Replace a class with another class for each node.
     * If no oldClassName is present, the newClassName is simply added.
     * @method replaceClass  
     * @param {String} oldClassName the class name to be replaced
     * @param {String} newClassName the class name that will be replacing the old class name
     * @chainable
     */
     'replaceClass',

    /**
     * If the className exists on the node it is removed, if it doesn't exist it is added.
     * @method toggleClass  
     * @param {String} className the class name to be toggled
     * @param {Boolean} force Option to force adding or removing the class. 
     * @chainable
     */
     'toggleClass'
    ];

    Y.Node.importMethod(Y.DOM, methods);
    /**
     * Determines whether each node has the given className.
     * @method hasClass
     * @see Node.hasClass
     * @for NodeList
     * @param {String} className the class name to search for
     * @return {Array} An array of booleans for each node bound to the NodeList. 
     */

    /**
     * Adds a class name to each node.
     * @method addClass         
     * @see Node.addClass
     * @param {String} className the class name to add to the node's class attribute
     * @chainable
     */

    /**
     * Removes a class name from each node.
     * @method removeClass         
     * @see Node.removeClass
     * @param {String} className the class name to remove from the node's class attribute
     * @chainable
     */

    /**
     * Replace a class with another class for each node.
     * If no oldClassName is present, the newClassName is simply added.
     * @method replaceClass  
     * @see Node.replaceClass
     * @param {String} oldClassName the class name to be replaced
     * @param {String} newClassName the class name that will be replacing the old class name
     * @chainable
     */

    /**
     * If the className exists on the node it is removed, if it doesn't exist it is added.
     * @method toggleClass  
     * @see Node.toggleClass
     * @param {String} className the class name to be toggled
     * @chainable
     */
    Y.NodeList.importMethod(Y.Node.prototype, methods);
})(Y);

if (!Y.config.doc.documentElement.hasAttribute) { // IE < 8
    Y.Node.prototype.hasAttribute = function(attr) {
        if (attr === 'value') {
            if (this.get('value') !== "") { // IE < 8 fails to populate specified when set in HTML
                return true;
            }
        }
        return !!(this._node.attributes[attr] &&
                this._node.attributes[attr].specified);
    };
}

// IE throws an error when calling focus() on an element that's invisible, not
// displayed, or disabled.
Y.Node.prototype.focus = function () {
    try {
        this._node.focus();
    } catch (e) {
    }
};

// IE throws error when setting input.type = 'hidden',
// input.setAttribute('type', 'hidden') and input.attributes.type.value = 'hidden'
Y.Node.ATTRS.type = {
    setter: function(val) {
        if (val === 'hidden') {
            try {
                this._node.type = 'hidden';
            } catch(e) {
                this.setStyle('display', 'none');
                this._inputType = 'hidden';
            }
        } else {
            try { // IE errors when changing the type from "hidden'
                this._node.type = val;
            } catch (e) {
            }
        }
        return val;
    },

    getter: function() {
        return this._inputType || this._node.type;
    },

    _bypassProxy: true // don't update DOM when using with Attribute
};

if (Y.config.doc.createElement('form').elements.nodeType) {
    // IE: elements collection is also FORM node which trips up scrubVal.
    Y.Node.ATTRS.elements = {
            getter: function() {
                return this.all('input, textarea, button, select');
            }
    };
}

Y.mix(Y.Node.ATTRS, {
    offsetHeight: {
        setter: function(h) {
            Y.DOM.setHeight(this._node, h);
            return h;
        },

        getter: function() {
            return this._node.offsetHeight;
        }
    },

    offsetWidth: {
        setter: function(w) {
            Y.DOM.setWidth(this._node, w);
            return w;
        },

        getter: function() {
            return this._node.offsetWidth;
        }
    }
});

Y.mix(Y.Node.prototype, {
    sizeTo: function(w, h) {
        var node;
        if (arguments.length < 2) {
            node = Y.one(w);
            w = node.get('offsetWidth');
            h = node.get('offsetHeight');
        }

        this.setAttrs({
            offsetWidth: w,
            offsetHeight: h
        });
    }
});
var Y_NodeList = Y.NodeList,
    ArrayProto = Array.prototype,
    ArrayMethods = [
        /** Returns a new NodeList combining the given NodeList(s) 
          * @for NodeList
          * @method concat
          * @param {NodeList | Array} valueN Arrays/NodeLists and/or values to
          * concatenate to the resulting NodeList
          * @return {NodeList} A new NodeList comprised of this NodeList joined with the input.
          */
        'concat',
        /** Removes the first last from the NodeList and returns it.
          * @for NodeList
          * @method pop
          * @return {Node} The last item in the NodeList.
          */
        'pop',
        /** Adds the given Node(s) to the end of the NodeList. 
          * @for NodeList
          * @method push
          * @param {Node | DOMNode} nodeN One or more nodes to add to the end of the NodeList. 
          */
        'push',
        /** Removes the first item from the NodeList and returns it.
          * @for NodeList
          * @method shift
          * @return {Node} The first item in the NodeList.
          */
        'shift',
        /** Returns a new NodeList comprising the Nodes in the given range. 
          * @for NodeList
          * @method slice
          * @param {Number} begin Zero-based index at which to begin extraction.
          As a negative index, start indicates an offset from the end of the sequence. slice(-2) extracts the second-to-last element and the last element in the sequence.
          * @param {Number} end Zero-based index at which to end extraction. slice extracts up to but not including end.
          slice(1,4) extracts the second element through the fourth element (elements indexed 1, 2, and 3).
          As a negative index, end indicates an offset from the end of the sequence. slice(2,-1) extracts the third element through the second-to-last element in the sequence.
          If end is omitted, slice extracts to the end of the sequence.
          * @return {NodeList} A new NodeList comprised of this NodeList joined with the input.
          */
        'slice',
        /** Changes the content of the NodeList, adding new elements while removing old elements.
          * @for NodeList
          * @method splice
          * @param {Number} index Index at which to start changing the array. If negative, will begin that many elements from the end.
          * @param {Number} howMany An integer indicating the number of old array elements to remove. If howMany is 0, no elements are removed. In this case, you should specify at least one new element. If no howMany parameter is specified (second syntax above, which is a SpiderMonkey extension), all elements after index are removed.
          * {Node | DOMNode| element1, ..., elementN 
          The elements to add to the array. If you don't specify any elements, splice simply removes elements from the array.
          * @return {NodeList} The element(s) removed.
          */
        'splice',
        /** Adds the given Node(s) to the beginning of the NodeList. 
          * @for NodeList
          * @method push
          * @param {Node | DOMNode} nodeN One or more nodes to add to the NodeList. 
          */
        'unshift'
    ];


Y.Array.each(ArrayMethods, function(name) {
    Y_NodeList.prototype[name] = function() {
        var args = [],
            i = 0,
            arg;

        while ((arg = arguments[i++])) { // use DOM nodes/nodeLists 
            args.push(arg._node || arg._nodes || arg);
        }
        return Y.Node.scrubVal(ArrayProto[name].apply(this._nodes, args));
    };
});


}, '3.3.0' ,{requires:['dom-base', 'selector-css2', 'event-base']});
