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YUI.add('dom-base', function (Y, NAME) {

/**
* @for DOM
* @module dom
*/
var documentElement = Y.config.doc.documentElement,
    Y_DOM = Y.DOM,
    TAG_NAME = 'tagName',
    OWNER_DOCUMENT = 'ownerDocument',
    EMPTY_STRING = '',
    addFeature = Y.Features.add,
    testFeature = Y.Features.test;

Y.mix(Y_DOM, {
    /**
     * Returns the text content of the HTMLElement.
     * @method getText
     * @param {HTMLElement} element The html element.
     * @return {String} The text content of the element (includes text of any descending elements).
     */
    getText: (documentElement.textContent !== undefined) ?
        function(element) {
            var ret = '';
            if (element) {
                ret = element.textContent;
            }
            return ret || '';
        } : function(element) {
            var ret = '';
            if (element) {
                ret = element.innerText || element.nodeValue; // might be a textNode
            }
            return ret || '';
        },

/**
     * Sets the text content of the HTMLElement.
     * @method setText
     * @param {HTMLElement} element The html element.
     * @param {String} content The content to add.
     */
    setText: (documentElement.textContent !== undefined) ?
        function(element, content) {
            if (element) {
                element.textContent = content;
            }
        } : function(element, content) {
            if ('innerText' in element) {
                element.innerText = content;
            } else if ('nodeValue' in element) {
                element.nodeValue = content;
            }
    },

CUSTOM_ATTRIBUTES: (!documentElement.hasAttribute) ? { // IE < 8
        'for': 'htmlFor',
        'class': 'className'
    } : { // w3c
        'htmlFor': 'for',
        'className': 'class'
    },

/**
     * Provides a normalized attribute interface.
     * @method setAttribute
     * @param {HTMLElement} el The target element for the attribute.
     * @param {String} attr The attribute to set.
     * @param {String} val The value of the attribute.
     */
    setAttribute: function(el, attr, val, ieAttr) {
        if (el && attr && el.setAttribute) {
            attr = Y_DOM.CUSTOM_ATTRIBUTES[attr] || attr;
            el.setAttribute(attr, val, ieAttr);
        }
    },

/**
     * Provides a normalized attribute interface.
     * @method getAttribute
     * @param {HTMLElement} el The target element for the attribute.
     * @param {String} attr The attribute to get.
     * @return {String} The current value of the attribute.
     */
    getAttribute: function(el, attr, ieAttr) {
        ieAttr = (ieAttr !== undefined) ? ieAttr : 2;
        var ret = '';
        if (el && attr && el.getAttribute) {
            attr = Y_DOM.CUSTOM_ATTRIBUTES[attr] || attr;
            // BUTTON value issue for IE < 8
            ret = (el.tagName === "BUTTON" && attr === 'value') ? Y_DOM.getValue(el) : el.getAttribute(attr, ieAttr);

if (ret === null) {
                ret = ''; // per DOM spec
            }
        }
        return ret;
    },

VALUE_SETTERS: {},

VALUE_GETTERS: {},

getValue: function(node) {
        var ret = '', // TODO: return null?
            getter;

if (node && node[TAG_NAME]) {
            getter = Y_DOM.VALUE_GETTERS[node[TAG_NAME].toLowerCase()];

if (getter) {
                ret = getter(node);
            } else {
                ret = node.value;
            }
        }

// workaround for IE8 JSON stringify bug
        // which converts empty string values to null
        if (ret === EMPTY_STRING) {
            ret = EMPTY_STRING; // for real
        }

return (typeof ret === 'string') ? ret : '';
    },

setValue: function(node, val) {
        var setter;

if (node && node[TAG_NAME]) {
            setter = Y_DOM.VALUE_SETTERS[node[TAG_NAME].toLowerCase()];
            val = (val === null) ? '' : val;
            if (setter) {
                setter(node, val);
            } else {
                node.value = val;
            }
        }
    },

creators: {}
});

addFeature('value-set', 'select', {
    test: function() {
        var node = Y.config.doc.createElement('select');
        node.innerHTML = '<option>1</option><option>2</option>';
        node.value = '2';
        return (node.value && node.value === '2');
    }
});

if (!testFeature('value-set', 'select')) {
    Y_DOM.VALUE_SETTERS.select = function(node, val) {
        for (var i = 0, options = node.getElementsByTagName('option'), option;
                option = options[i++];) {
            if (Y_DOM.getValue(option) === val) {
                option.selected = true;
                //Y_DOM.setAttribute(option, 'selected', 'selected');
                break;
            }
        }
    };
}

Y.mix(Y_DOM.VALUE_GETTERS, {
    button: function(node) {
        return (node.attributes && node.attributes.value) ? node.attributes.value.value : '';
    }
});

Y.mix(Y_DOM.VALUE_SETTERS, {
    // IE: node.value changes the button text, which should be handled via innerHTML
    button: function(node, val) {
        var attr = node.attributes.value;
        if (!attr) {
            attr = node[OWNER_DOCUMENT].createAttribute('value');
            node.setAttributeNode(attr);
        }

attr.value = val;
    }
});

Y.mix(Y_DOM.VALUE_GETTERS, {
    option: function(node) {
        var attrs = node.attributes;
        return (attrs.value && attrs.value.specified) ? node.value : node.text;
    },

select: function(node) {
        var val = node.value,
            options = node.options;

if (options && options.length) {
            // TODO: implement multipe select
            if (node.multiple) {
            } else if (node.selectedIndex > -1) {
                val = Y_DOM.getValue(options[node.selectedIndex]);
            }
        }

return val;
    }
});
var addClass, hasClass, removeClass;

Y.mix(Y.DOM, {
    /**
     * Determines whether a DOM element has the given className.
     * @method hasClass
     * @for DOM
     * @param {HTMLElement} element The DOM element.
     * @param {String} className the class name to search for
     * @return {Boolean} Whether or not the element has the given class.
     */
    hasClass: function(node, className) {
        var re = Y.DOM._getRegExp('(?:^|\\s+)' + className + '(?:\\s+|$)');
        return re.test(node.className);
    },

/**
     * Adds a class name to a given DOM element.
     * @method addClass
     * @for DOM
     * @param {HTMLElement} element The DOM element.
     * @param {String} className the class name to add to the class attribute
     */
    addClass: function(node, className) {
        if (!Y.DOM.hasClass(node, className)) { // skip if already present
            node.className = Y.Lang.trim([node.className, className].join(' '));
        }
    },

/**
     * Removes a class name from a given element.
     * @method removeClass
     * @for DOM
     * @param {HTMLElement} element The DOM element.
     * @param {String} className the class name to remove from the class attribute
     */
    removeClass: function(node, className) {
        if (className && hasClass(node, className)) {
            node.className = Y.Lang.trim(node.className.replace(Y.DOM._getRegExp('(?:^|\\s+)' +
                            className + '(?:\\s+|$)'), ' '));

if ( hasClass(node, className) ) { // in case of multiple adjacent
                removeClass(node, className);
            }
        }
    },

/**
     * Replace a class with another class for a given element.
     * If no oldClassName is present, the newClassName is simply added.
     * @method replaceClass
     * @for DOM
     * @param {HTMLElement} element The DOM element
     * @param {String} oldClassName the class name to be replaced
     * @param {String} newClassName the class name that will be replacing the old class name
     */
    replaceClass: function(node, oldC, newC) {
        removeClass(node, oldC); // remove first in case oldC === newC
        addClass(node, newC);
    },

/**
     * If the className exists on the node it is removed, if it doesn't exist it is added.
     * @method toggleClass
     * @for DOM
     * @param {HTMLElement} element The DOM element
     * @param {String} className the class name to be toggled
     * @param {Boolean} addClass optional boolean to indicate whether class
     * should be added or removed regardless of current state
     */
    toggleClass: function(node, className, force) {
        var add = (force !== undefined) ? force :
                !(hasClass(node, className));

if (add) {
            addClass(node, className);
        } else {
            removeClass(node, className);
        }
    }
});

hasClass = Y.DOM.hasClass;
removeClass = Y.DOM.removeClass;
addClass = Y.DOM.addClass;

var re_tag = /<([a-z]+)/i,

Y_DOM = Y.DOM,

addFeature = Y.Features.add,
    testFeature = Y.Features.test,

creators = {},

createFromDIV = function(html, tag) {
        var div = Y.config.doc.createElement('div'),
            ret = true;

div.innerHTML = html;
        if (!div.firstChild || div.firstChild.tagName !== tag.toUpperCase()) {
            ret = false;
        }

return ret;
    },

TABLE_OPEN = '<table>',
    TABLE_CLOSE = '</table>',

selectedIndex;

Y.mix(Y.DOM, {
    _fragClones: {},

_create: function(html, doc, tag) {
        tag = tag || 'div';

var frag = Y_DOM._fragClones[tag];
        if (frag) {
            frag = frag.cloneNode(false);
        } else {
            frag = Y_DOM._fragClones[tag] = doc.createElement(tag);
        }
        frag.innerHTML = html;
        return frag;
    },

_children: function(node, tag) {
            var i = 0,
            children = node.children,
            childNodes,
            hasComments,
            child;

if (children && children.tags) { // use tags filter when possible
            if (tag) {
                children = node.children.tags(tag);
            } else { // IE leaks comments into children
                hasComments = children.tags('!').length;
            }
        }

if (!children || (!children.tags && tag) || hasComments) {
            childNodes = children || node.childNodes;
            children = [];
            while ((child = childNodes[i++])) {
                if (child.nodeType === 1) {
                    if (!tag || tag === child.tagName) {
                        children.push(child);
                    }
                }
            }
        }

return children || [];
    },

/**
     * Creates a new dom 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 {HTMLElement|DocumentFragment} returns a single HTMLElement
     * when creating one node, and a documentFragment when creating
     * multiple nodes.
     */
    create: function(html, doc) {
        if (typeof html === 'string') {
            html = Y.Lang.trim(html); // match IE which trims whitespace from innerHTML

}

doc = doc || Y.config.doc;
        var m = re_tag.exec(html),
            create = Y_DOM._create,
            custom = creators,
            ret = null,
            creator, tag, node, nodes;

if (html != undefined) { // not undefined or null
            if (m && m[1]) {
                creator = custom[m[1].toLowerCase()];
                if (typeof creator === 'function') {
                    create = creator;
                } else {
                    tag = creator;
                }
            }

node = create(html, doc, tag);
            nodes = node.childNodes;

if (nodes.length === 1) { // return single node, breaking parentNode ref from "fragment"
                ret = node.removeChild(nodes[0]);
            } else if (nodes[0] && nodes[0].className === 'yui3-big-dummy') { // using dummy node to preserve some attributes (e.g. OPTION not selected)
                selectedIndex = node.selectedIndex;

if (nodes.length === 2) {
                    ret = nodes[0].nextSibling;
                } else {
                    node.removeChild(nodes[0]);
                    ret = Y_DOM._nl2frag(nodes, doc);
                }
            } else { // return multiple nodes as a fragment
                 ret = Y_DOM._nl2frag(nodes, doc);
            }

}

return ret;
    },

_nl2frag: function(nodes, doc) {
        var ret = null,
            i, len;

if (nodes && (nodes.push || nodes.item) && nodes[0]) {
            doc = doc || nodes[0].ownerDocument;
            ret = doc.createDocumentFragment();

if (nodes.item) { // convert live list to static array
                nodes = Y.Array(nodes, 0, true);
            }

for (i = 0, len = nodes.length; i < len; i++) {
                ret.appendChild(nodes[i]);
            }
        } // else inline with log for minification
        return ret;
    },

/**
     * Inserts content in a node at the given location
     * @method addHTML
     * @param {HTMLElement} node The node to insert into
     * @param {HTMLElement | Array | HTMLCollection} content The content to be inserted
     * @param {HTMLElement} where Where to insert the content
     * If no "where" is given, content is appended to the node
     * Possible values for "where"
     * <dl>
     * <dt>HTMLElement</dt>
     * <dd>The 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>
     */
    addHTML: function(node, content, where) {
        var nodeParent = node.parentNode,
            i = 0,
            item,
            ret = content,
            newNode;

if (content != undefined) { // not null or undefined (maybe 0)
            if (content.nodeType) { // DOM node, just add it
                newNode = content;
            } else if (typeof content == 'string' || typeof content == 'number') {
                ret = newNode = Y_DOM.create(content);
            } else if (content[0] && content[0].nodeType) { // array or collection
                newNode = Y.config.doc.createDocumentFragment();
                while ((item = content[i++])) {
                    newNode.appendChild(item); // append to fragment for insertion
                }
            }
        }

if (where) {
            if (newNode && where.parentNode) { // insert regardless of relationship to node
                where.parentNode.insertBefore(newNode, where);
            } else {
                switch (where) {
                    case 'replace':
                        while (node.firstChild) {
                            node.removeChild(node.firstChild);
                        }
                        if (newNode) { // allow empty content to clear node
                            node.appendChild(newNode);
                        }
                        break;
                    case 'before':
                        if (newNode) {
                            nodeParent.insertBefore(newNode, node);
                        }
                        break;
                    case 'after':
                        if (newNode) {
                            if (node.nextSibling) { // IE errors if refNode is null
                                nodeParent.insertBefore(newNode, node.nextSibling);
                            } else {
                                nodeParent.appendChild(newNode);
                            }
                        }
                        break;
                    default:
                        if (newNode) {
                            node.appendChild(newNode);
                        }
                }
            }
        } else if (newNode) {
            node.appendChild(newNode);
        }

// `select` elements are the only elements with `selectedIndex`.
        // Don't grab the dummy `option` element's `selectedIndex`.
        if (node.nodeName == "SELECT" && selectedIndex > 0) {
            node.selectedIndex = selectedIndex - 1;
        }

return ret;
    },

wrap: function(node, html) {
        var parent = (html && html.nodeType) ? html : Y.DOM.create(html),
            nodes = parent.getElementsByTagName('*');

if (nodes.length) {
            parent = nodes[nodes.length - 1];
        }

if (node.parentNode) {
            node.parentNode.replaceChild(parent, node);
        }
        parent.appendChild(node);
    },

unwrap: function(node) {
        var parent = node.parentNode,
            lastChild = parent.lastChild,
            next = node,
            grandparent;

if (parent) {
            grandparent = parent.parentNode;
            if (grandparent) {
                node = parent.firstChild;
                while (node !== lastChild) {
                    next = node.nextSibling;
                    grandparent.insertBefore(node, parent);
                    node = next;
                }
                grandparent.replaceChild(lastChild, parent);
            } else {
                parent.removeChild(node);
            }
        }
    }
});

addFeature('innerhtml', 'table', {
    test: function() {
        var node = Y.config.doc.createElement('table');
        try {
            node.innerHTML = '<tbody></tbody>';
        } catch(e) {
            return false;
        }
        return (node.firstChild && node.firstChild.nodeName === 'TBODY');
    }
});

addFeature('innerhtml-div', 'tr', {
    test: function() {
        return createFromDIV('<tr></tr>', 'tr');
    }
});

addFeature('innerhtml-div', 'script', {
    test: function() {
        return createFromDIV('<script></script>', 'script');
    }
});

if (!testFeature('innerhtml', 'table')) {
    // TODO: thead/tfoot with nested tbody
        // IE adds TBODY when creating TABLE elements (which may share this impl)
    creators.tbody = function(html, doc) {
        var frag = Y_DOM.create(TABLE_OPEN + html + TABLE_CLOSE, doc),
            tb = Y.DOM._children(frag, 'tbody')[0];

if (frag.children.length > 1 && tb && !re_tbody.test(html)) {
            tb.parentNode.removeChild(tb); // strip extraneous tbody
        }
        return frag;
    };
}

if (!testFeature('innerhtml-div', 'script')) {
    creators.script = function(html, doc) {
        var frag = doc.createElement('div');

frag.innerHTML = '-' + html;
        frag.removeChild(frag.firstChild);
        return frag;
    };

creators.link = creators.style = creators.script;
}

if (!testFeature('innerhtml-div', 'tr')) {
    Y.mix(creators, {
        option: function(html, doc) {
            return Y_DOM.create('<select><option class="yui3-big-dummy" selected></option>' + html + '</select>', doc);
        },

tr: function(html, doc) {
            return Y_DOM.create('<tbody>' + html + '</tbody>', doc);
        },

td: function(html, doc) {
            return Y_DOM.create('<tr>' + html + '</tr>', doc);
        },

col: function(html, doc) {
            return Y_DOM.create('<colgroup>' + html + '</colgroup>', doc);
        },

tbody: 'table'
    });

Y.mix(creators, {
        legend: 'fieldset',
        th: creators.td,
        thead: creators.tbody,
        tfoot: creators.tbody,
        caption: creators.tbody,
        colgroup: creators.tbody,
        optgroup: creators.option
    });
}

Y_DOM.creators = creators;
Y.mix(Y.DOM, {
    /**
     * Sets the width of the element to the given size, regardless
     * of box model, border, padding, etc.
     * @method setWidth
     * @param {HTMLElement} element The DOM element.
     * @param {String|Number} size The pixel height to size to
     */

setWidth: function(node, size) {
        Y.DOM._setSize(node, 'width', size);
    },

/**
     * Sets the height of the element to the given size, regardless
     * of box model, border, padding, etc.
     * @method setHeight
     * @param {HTMLElement} element The DOM element.
     * @param {String|Number} size The pixel height to size to
     */

setHeight: function(node, size) {
        Y.DOM._setSize(node, 'height', size);
    },

_setSize: function(node, prop, val) {
        val = (val > 0) ? val : 0;
        var size = 0;

node.style[prop] = val + 'px';
        size = (prop === 'height') ? node.offsetHeight : node.offsetWidth;

if (size > val) {
            val = val - (size - val);

if (val < 0) {
                val = 0;
            }

node.style[prop] = val + 'px';
        }
    }
});

}, '3.18.1', {"requires": ["dom-core"]});

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