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✏️ Editing: dom-core.js

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

var NODE_TYPE = 'nodeType',
    OWNER_DOCUMENT = 'ownerDocument',
    DOCUMENT_ELEMENT = 'documentElement',
    DEFAULT_VIEW = 'defaultView',
    PARENT_WINDOW = 'parentWindow',
    TAG_NAME = 'tagName',
    PARENT_NODE = 'parentNode',
    PREVIOUS_SIBLING = 'previousSibling',
    NEXT_SIBLING = 'nextSibling',
    CONTAINS = 'contains',
    COMPARE_DOCUMENT_POSITION = 'compareDocumentPosition',
    EMPTY_ARRAY = [],

// IE < 8 throws on node.contains(textNode)
    supportsContainsTextNode = (function() {
        var node = Y.config.doc.createElement('div'),
            textNode = node.appendChild(Y.config.doc.createTextNode('')),
            result = false;

try {
            result = node.contains(textNode);
        } catch(e) {}

return result;
    })(),

/**
 * The DOM utility provides a cross-browser abtraction layer
 * normalizing DOM tasks, and adds extra helper functionality
 * for other common tasks.
 * @module dom
 * @main dom
 * @submodule dom-base
 * @for DOM
 *
 */

/**
 * Provides DOM helper methods.
 * @class DOM
 *
 */

Y_DOM = {
    /**
     * Returns the HTMLElement with the given ID (Wrapper for document.getElementById).
     * @method byId
     * @param {String} id the id attribute
     * @param {Object} doc optional The document to search. Defaults to current document
     * @return {HTMLElement | null} The HTMLElement with the id, or null if none found.
     */
    byId: function(id, doc) {
        // handle dupe IDs and IE name collision
        return Y_DOM.allById(id, doc)[0] || null;
    },

getId: function(node) {
        var id;
        // HTMLElement returned from FORM when INPUT name === "id"
        // IE < 8: HTMLCollection returned when INPUT id === "id"
        // via both getAttribute and form.id
        if (node.id && !node.id.tagName && !node.id.item) {
            id = node.id;
        } else if (node.attributes && node.attributes.id) {
            id = node.attributes.id.value;
        }

return id;
    },

setId: function(node, id) {
        if (node.setAttribute) {
            node.setAttribute('id', id);
        } else {
            node.id = id;
        }
    },

/*
     * Finds the ancestor of the element.
     * @method ancestor
     * @param {HTMLElement} element The html element.
     * @param {Function} fn optional An optional boolean test to apply.
     * The optional function is passed the current DOM node being tested as its only argument.
     * If no function is given, the parentNode is returned.
     * @param {Boolean} testSelf optional Whether or not to include the element in the scan
     * @return {HTMLElement | null} The matching DOM node or null if none found.
     */
    ancestor: function(element, fn, testSelf, stopFn) {
        var ret = null;
        if (testSelf) {
            ret = (!fn || fn(element)) ? element : null;

}
        return ret || Y_DOM.elementByAxis(element, PARENT_NODE, fn, null, stopFn);
    },

/*
     * Finds the ancestors of the element.
     * @method ancestors
     * @param {HTMLElement} element The html element.
     * @param {Function} fn optional An optional boolean test to apply.
     * The optional function is passed the current DOM node being tested as its only argument.
     * If no function is given, all ancestors are returned.
     * @param {Boolean} testSelf optional Whether or not to include the element in the scan
     * @return {Array} An array containing all matching DOM nodes.
     */
    ancestors: function(element, fn, testSelf, stopFn) {
        var ancestor = element,
            ret = [];

while ((ancestor = Y_DOM.ancestor(ancestor, fn, testSelf, stopFn))) {
            testSelf = false;
            if (ancestor) {
                ret.unshift(ancestor);

if (stopFn && stopFn(ancestor)) {
                    return ret;
                }
            }
        }

return ret;
    },

/**
     * Searches the element by the given axis for the first matching element.
     * @method elementByAxis
     * @param {HTMLElement} element The html element.
     * @param {String} axis The axis to search (parentNode, nextSibling, previousSibling).
     * @param {Function} [fn] An optional boolean test to apply.
     * @param {Boolean} [all] Whether text nodes as well as element nodes should be returned, or
     * just element nodes will be returned(default)
     * The optional function is passed the current HTMLElement being tested as its only argument.
     * If no function is given, the first element is returned.
     * @return {HTMLElement | null} The matching element or null if none found.
     */
    elementByAxis: function(element, axis, fn, all, stopAt) {
        while (element && (element = element[axis])) { // NOTE: assignment
                if ( (all || element[TAG_NAME]) && (!fn || fn(element)) ) {
                    return element;
                }

if (stopAt && stopAt(element)) {
                    return null;
                }
        }
        return null;
    },

/**
     * Determines whether or not one HTMLElement is or contains another HTMLElement.
     * @method contains
     * @param {HTMLElement} element The containing html element.
     * @param {HTMLElement} needle The html element that may be contained.
     * @return {Boolean} Whether or not the element is or contains the needle.
     */
    contains: function(element, needle) {
        var ret = false;

if ( !needle || !element || !needle[NODE_TYPE] || !element[NODE_TYPE]) {
            ret = false;
        } else if (element[CONTAINS] &&
                // IE < 8 throws on node.contains(textNode) so fall back to brute.
                // Falling back for other nodeTypes as well.
                (needle[NODE_TYPE] === 1 || supportsContainsTextNode)) {
                ret = element[CONTAINS](needle);
        } else if (element[COMPARE_DOCUMENT_POSITION]) {
            // Match contains behavior (node.contains(node) === true).
            // Needed for Firefox < 4.
            if (element === needle || !!(element[COMPARE_DOCUMENT_POSITION](needle) & 16)) {
                ret = true;
            }
        } else {
            ret = Y_DOM._bruteContains(element, needle);
        }

return ret;
    },

/**
     * Determines whether or not the HTMLElement is part of the document.
     * @method inDoc
     * @param {HTMLElement} element The containing html element.
     * @param {HTMLElement} doc optional The document to check.
     * @return {Boolean} Whether or not the element is attached to the document.
     */
    inDoc: function(element, doc) {
        var ret = false,
            rootNode;

if (element && element.nodeType) {
            (doc) || (doc = element[OWNER_DOCUMENT]);

rootNode = doc[DOCUMENT_ELEMENT];

// contains only works with HTML_ELEMENT
            if (rootNode && rootNode.contains && element.tagName) {
                ret = rootNode.contains(element);
            } else {
                ret = Y_DOM.contains(rootNode, element);
            }
        }

return ret;

allById: function(id, root) {
        root = root || Y.config.doc;
        var nodes = [],
            ret = [],
            i,
            node;

if (root.querySelectorAll) {
            ret = root.querySelectorAll('[id="' + id + '"]');
        } else if (root.all) {
            nodes = root.all(id);

if (nodes) {
                // root.all may return HTMLElement or HTMLCollection.
                // some elements are also HTMLCollection (FORM, SELECT).
                if (nodes.nodeName) {
                    if (nodes.id === id) { // avoid false positive on name
                        ret.push(nodes);
                        nodes = EMPTY_ARRAY; // done, no need to filter
                    } else { //  prep for filtering
                        nodes = [nodes];
                    }
                }

if (nodes.length) {
                    // filter out matches on node.name
                    // and element.id as reference to element with id === 'id'
                    for (i = 0; node = nodes[i++];) {
                        if (node.id === id  ||
                                (node.attributes && node.attributes.id &&
                                node.attributes.id.value === id)) {
                            ret.push(node);
                        }
                    }
                }
            }
        } else {
            ret = [Y_DOM._getDoc(root).getElementById(id)];
        }

return ret;
   },

isWindow: function(obj) {
        return !!(obj && obj.scrollTo && obj.document);
    },

_removeChildNodes: function(node) {
        while (node.firstChild) {
            node.removeChild(node.firstChild);
        }
    },

siblings: function(node, fn) {
        var nodes = [],
            sibling = node;

while ((sibling = sibling[PREVIOUS_SIBLING])) {
            if (sibling[TAG_NAME] && (!fn || fn(sibling))) {
                nodes.unshift(sibling);
            }
        }

sibling = node;
        while ((sibling = sibling[NEXT_SIBLING])) {
            if (sibling[TAG_NAME] && (!fn || fn(sibling))) {
                nodes.push(sibling);
            }
        }

return nodes;
    },

/**
     * Brute force version of contains.
     * Used for browsers without contains support for non-HTMLElement Nodes (textNodes, etc).
     * @method _bruteContains
     * @private
     * @param {HTMLElement} element The containing html element.
     * @param {HTMLElement} needle The html element that may be contained.
     * @return {Boolean} Whether or not the element is or contains the needle.
     */
    _bruteContains: function(element, needle) {
        while (needle) {
            if (element === needle) {
                return true;
            }
            needle = needle.parentNode;
        }
        return false;
    },

// TODO: move to Lang?
    /**
     * Memoizes dynamic regular expressions to boost runtime performance.
     * @method _getRegExp
     * @private
     * @param {String} str The string to convert to a regular expression.
     * @param {String} flags optional An optinal string of flags.
     * @return {RegExp} An instance of RegExp
     */
    _getRegExp: function(str, flags) {
        flags = flags || '';
        Y_DOM._regexCache = Y_DOM._regexCache || {};
        if (!Y_DOM._regexCache[str + flags]) {
            Y_DOM._regexCache[str + flags] = new RegExp(str, flags);
        }
        return Y_DOM._regexCache[str + flags];
    },

// TODO: make getDoc/Win true privates?
    /**
     * returns the appropriate document.
     * @method _getDoc
     * @private
     * @param {HTMLElement} element optional Target element.
     * @return {Object} The document for the given element or the default document.
     */
    _getDoc: function(element) {
        var doc = Y.config.doc;
        if (element) {
            doc = (element[NODE_TYPE] === 9) ? element : // element === document
                element[OWNER_DOCUMENT] || // element === DOM node
                element.document || // element === window
                Y.config.doc; // default
        }

return doc;
    },

/**
     * returns the appropriate window.
     * @method _getWin
     * @private
     * @param {HTMLElement} element optional Target element.
     * @return {Object} The window for the given element or the default window.
     */
    _getWin: function(element) {
        var doc = Y_DOM._getDoc(element);
        return doc[DEFAULT_VIEW] || doc[PARENT_WINDOW] || Y.config.win;
    },

_batch: function(nodes, fn, arg1, arg2, arg3, etc) {
        fn = (typeof fn === 'string') ? Y_DOM[fn] : fn;
        var result,
            i = 0,
            node,
            ret;

if (fn && nodes) {
            while ((node = nodes[i++])) {
                result = result = fn.call(Y_DOM, node, arg1, arg2, arg3, etc);
                if (typeof result !== 'undefined') {
                    (ret) || (ret = []);
                    ret.push(result);
                }
            }
        }

return (typeof ret !== 'undefined') ? ret : nodes;
    },

generateID: function(el) {
        var id = el.id;

if (!id) {
            id = Y.stamp(el);
            el.id = id;
        }

return id;
    }
};

Y.DOM = Y_DOM;

}, '3.18.1', {"requires": ["oop", "features"]});

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