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+/*
+Copyright (c) 2008, Yahoo! Inc. All rights reserved.
+Code licensed under the BSD License:
+http://developer.yahoo.net/yui/license.txt
+version: 2.6.0
+*/
+/**
+ * The dom module provides helper methods for manipulating Dom elements.
+ * @module dom
+ *
+ */
+
+(function() {
+ var Y = YAHOO.util, // internal shorthand
+ lang = YAHOO.lang,
+ getStyle, // for load time browser branching
+ setStyle, // ditto
+ propertyCache = {}, // for faster hyphen converts
+ reClassNameCache = {}, // cache regexes for className
+ document = window.document; // cache for faster lookups
+
+ YAHOO.env._id_counter = YAHOO.env._id_counter || 0; // for use with generateId (global to save state if Dom is overwritten)
+
+ // brower detection
+ var isOpera = YAHOO.env.ua.opera,
+ isSafari = YAHOO.env.ua.webkit,
+ isGecko = YAHOO.env.ua.gecko,
+ isIE = YAHOO.env.ua.ie;
+
+ // regex cache
+ var patterns = {
+ HYPHEN: /(-[a-z])/i, // to normalize get/setStyle
+ ROOT_TAG: /^body|html$/i, // body for quirks mode, html for standards,
+ OP_SCROLL:/^(?:inline|table-row)$/i
+ };
+
+ var toCamel = function(property) {
+ if ( !patterns.HYPHEN.test(property) ) {
+ return property; // no hyphens
+ }
+
+ if (propertyCache[property]) { // already converted
+ return propertyCache[property];
+ }
+
+ var converted = property;
+
+ while( patterns.HYPHEN.exec(converted) ) {
+ converted = converted.replace(RegExp.$1,
+ RegExp.$1.substr(1).toUpperCase());
+ }
+
+ propertyCache[property] = converted;
+ return converted;
+ //return property.replace(/-([a-z])/gi, function(m0, m1) {return m1.toUpperCase()}) // cant use function as 2nd arg yet due to safari bug
+ };
+
+ var getClassRegEx = function(className) {
+ var re = reClassNameCache[className];
+ if (!re) {
+ re = new RegExp('(?:^|\\s+)' + className + '(?:\\s+|$)');
+ reClassNameCache[className] = re;
+ }
+ return re;
+ };
+
+ // branching at load instead of runtime
+ if (document.defaultView && document.defaultView.getComputedStyle) { // W3C DOM method
+ getStyle = function(el, property) {
+ var value = null;
+
+ if (property == 'float') { // fix reserved word
+ property = 'cssFloat';
+ }
+
+ var computed = el.ownerDocument.defaultView.getComputedStyle(el, '');
+ if (computed) { // test computed before touching for safari
+ value = computed[toCamel(property)];
+ }
+
+ return el.style[property] || value;
+ };
+ } else if (document.documentElement.currentStyle && isIE) { // IE method
+ getStyle = function(el, property) {
+ switch( toCamel(property) ) {
+ case 'opacity' :// IE opacity uses filter
+ var val = 100;
+ try { // will error if no DXImageTransform
+ val = el.filters['DXImageTransform.Microsoft.Alpha'].opacity;
+
+ } catch(e) {
+ try { // make sure its in the document
+ val = el.filters('alpha').opacity;
+ } catch(e) {
+ }
+ }
+ return val / 100;
+ case 'float': // fix reserved word
+ property = 'styleFloat'; // fall through
+ default:
+ // test currentStyle before touching
+ var value = el.currentStyle ? el.currentStyle[property] : null;
+ return ( el.style[property] || value );
+ }
+ };
+ } else { // default to inline only
+ getStyle = function(el, property) { return el.style[property]; };
+ }
+
+ if (isIE) {
+ setStyle = function(el, property, val) {
+ switch (property) {
+ case 'opacity':
+ if ( lang.isString(el.style.filter) ) { // in case not appended
+ el.style.filter = 'alpha(opacity=' + val * 100 + ')';
+
+ if (!el.currentStyle || !el.currentStyle.hasLayout) {
+ el.style.zoom = 1; // when no layout or cant tell
+ }
+ }
+ break;
+ case 'float':
+ property = 'styleFloat';
+ default:
+ el.style[property] = val;
+ }
+ };
+ } else {
+ setStyle = function(el, property, val) {
+ if (property == 'float') {
+ property = 'cssFloat';
+ }
+ el.style[property] = val;
+ };
+ }
+
+ var testElement = function(node, method) {
+ return node && node.nodeType == 1 && ( !method || method(node) );
+ };
+
+ /**
+ * Provides helper methods for DOM elements.
+ * @namespace YAHOO.util
+ * @class Dom
+ */
+ YAHOO.util.Dom = {
+ /**
+ * Returns an HTMLElement reference.
+ * @method get
+ * @param {String | HTMLElement |Array} el Accepts a string to use as an ID for getting a DOM reference, an actual DOM reference, or an Array of IDs and/or HTMLElements.
+ * @return {HTMLElement | Array} A DOM reference to an HTML element or an array of HTMLElements.
+ */
+ get: function(el) {
+ if (el) {
+ if (el.nodeType || el.item) { // Node, or NodeList
+ return el;
+ }
+
+ if (typeof el === 'string') { // id
+ return document.getElementById(el);
+ }
+
+ if ('length' in el) { // array-like
+ var c = [];
+ for (var i = 0, len = el.length; i < len; ++i) {
+ c[c.length] = Y.Dom.get(el[i]);
+ }
+
+ return c;
+ }
+
+ return el; // some other object, just pass it back
+ }
+
+ return null;
+ },
+
+ /**
+ * Normalizes currentStyle and ComputedStyle.
+ * @method getStyle
+ * @param {String | HTMLElement |Array} el Accepts a string to use as an ID, an actual DOM reference, or an Array of IDs and/or HTMLElements.
+ * @param {String} property The style property whose value is returned.
+ * @return {String | Array} The current value of the style property for the element(s).
+ */
+ getStyle: function(el, property) {
+ property = toCamel(property);
+
+ var f = function(element) {
+ return getStyle(element, property);
+ };
+
+ return Y.Dom.batch(el, f, Y.Dom, true);
+ },
+
+ /**
+ * Wrapper for setting style properties of HTMLElements. Normalizes "opacity" across modern browsers.
+ * @method setStyle
+ * @param {String | HTMLElement | Array} el Accepts a string to use as an ID, an actual DOM reference, or an Array of IDs and/or HTMLElements.
+ * @param {String} property The style property to be set.
+ * @param {String} val The value to apply to the given property.
+ */
+ setStyle: function(el, property, val) {
+ property = toCamel(property);
+
+ var f = function(element) {
+ setStyle(element, property, val);
+
+ };
+
+ Y.Dom.batch(el, f, Y.Dom, true);
+ },
+
+ /**
+ * Gets the current position of an element based on page coordinates. Element must be part of the DOM tree to have page coordinates (display:none or elements not appended return false).
+ * @method getXY
+ * @param {String | HTMLElement | Array} el Accepts a string to use as an ID, an actual DOM reference, or an Array of IDs and/or HTMLElements
+ * @return {Array} The XY position of the element(s)
+ */
+ getXY: function(el) {
+ var f = function(el) {
+ // has to be part of document to have pageXY
+ if ( (el.parentNode === null || el.offsetParent === null ||
+ this.getStyle(el, 'display') == 'none') && el != el.ownerDocument.body) {
+ return false;
+ }
+
+ return getXY(el);
+ };
+
+ return Y.Dom.batch(el, f, Y.Dom, true);
+ },
+
+ /**
+ * Gets the current X position of an element based on page coordinates. The element must be part of the DOM tree to have page coordinates (display:none or elements not appended return false).
+ * @method getX
+ * @param {String | HTMLElement | Array} el Accepts a string to use as an ID, an actual DOM reference, or an Array of IDs and/or HTMLElements
+ * @return {Number | Array} The X position of the element(s)
+ */
+ getX: function(el) {
+ var f = function(el) {
+ return Y.Dom.getXY(el)[0];
+ };
+
+ return Y.Dom.batch(el, f, Y.Dom, true);
+ },
+
+ /**
+ * Gets the current Y position of an element based on page coordinates. Element must be part of the DOM tree to have page coordinates (display:none or elements not appended return false).
+ * @method getY
+ * @param {String | HTMLElement | Array} el Accepts a string to use as an ID, an actual DOM reference, or an Array of IDs and/or HTMLElements
+ * @return {Number | Array} The Y position of the element(s)
+ */
+ getY: function(el) {
+ var f = function(el) {
+ return Y.Dom.getXY(el)[1];
+ };
+
+ return Y.Dom.batch(el, f, Y.Dom, true);
+ },
+
+ /**
+ * Set the position of an html element in page coordinates, regardless of how the element is positioned.
+ * The element(s) must be part of the DOM tree to have page coordinates (display:none or elements not appended return false).
+ * @method setXY
+ * @param {String | HTMLElement | Array} el Accepts a string to use as an ID, an actual DOM reference, or an Array of IDs and/or HTMLElements
+ * @param {Array} pos Contains X & Y values for new position (coordinates are page-based)
+ * @param {Boolean} noRetry By default we try and set the position a second time if the first fails
+ */
+ setXY: function(el, pos, noRetry) {
+ var f = function(el) {
+ var style_pos = this.getStyle(el, 'position');
+ if (style_pos == 'static') { // default to relative
+ this.setStyle(el, 'position', 'relative');
+ style_pos = 'relative';
+ }
+
+ var pageXY = this.getXY(el);
+ if (pageXY === false) { // has to be part of doc to have pageXY
+ return false;
+ }
+
+ var delta = [ // assuming pixels; if not we will have to retry
+ parseInt( this.getStyle(el, 'left'), 10 ),
+ parseInt( this.getStyle(el, 'top'), 10 )
+ ];
+
+ if ( isNaN(delta[0]) ) {// in case of 'auto'
+ delta[0] = (style_pos == 'relative') ? 0 : el.offsetLeft;
+ }
+ if ( isNaN(delta[1]) ) { // in case of 'auto'
+ delta[1] = (style_pos == 'relative') ? 0 : el.offsetTop;
+ }
+
+ if (pos[0] !== null) { el.style.left = pos[0] - pageXY[0] + delta[0] + 'px'; }
+ if (pos[1] !== null) { el.style.top = pos[1] - pageXY[1] + delta[1] + 'px'; }
+
+ if (!noRetry) {
+ var newXY = this.getXY(el);
+
+ // if retry is true, try one more time if we miss
+ if ( (pos[0] !== null && newXY[0] != pos[0]) ||
+ (pos[1] !== null && newXY[1] != pos[1]) ) {
+ this.setXY(el, pos, true);
+ }
+ }
+
+ };
+
+ Y.Dom.batch(el, f, Y.Dom, true);
+ },
+
+ /**
+ * Set the X position of an html element in page coordinates, regardless of how the element is positioned.
+ * The element must be part of the DOM tree to have page coordinates (display:none or elements not appended return false).
+ * @method setX
+ * @param {String | HTMLElement | Array} el Accepts a string to use as an ID, an actual DOM reference, or an Array of IDs and/or HTMLElements.
+ * @param {Int} x The value to use as the X coordinate for the element(s).
+ */
+ setX: function(el, x) {
+ Y.Dom.setXY(el, [x, null]);
+ },
+
+ /**
+ * Set the Y position of an html element in page coordinates, regardless of how the element is positioned.
+ * The element must be part of the DOM tree to have page coordinates (display:none or elements not appended return false).
+ * @method setY
+ * @param {String | HTMLElement | Array} el Accepts a string to use as an ID, an actual DOM reference, or an Array of IDs and/or HTMLElements.
+ * @param {Int} x To use as the Y coordinate for the element(s).
+ */
+ setY: function(el, y) {
+ Y.Dom.setXY(el, [null, y]);
+ },
+
+ /**
+ * Returns the region position of the given element.
+ * The element must be part of the DOM tree to have a region (display:none or elements not appended return false).
+ * @method getRegion
+ * @param {String | HTMLElement | Array} el Accepts a string to use as an ID, an actual DOM reference, or an Array of IDs and/or HTMLElements.
+ * @return {Region | Array} A Region or array of Region instances containing "top, left, bottom, right" member data.
+ */
+ getRegion: function(el) {
+ var f = function(el) {
+ if ( (el.parentNode === null || el.offsetParent === null ||
+ this.getStyle(el, 'display') == 'none') && el != el.ownerDocument.body) {
+ return false;
+ }
+
+ var region = Y.Region.getRegion(el);
+ return region;
+ };
+
+ return Y.Dom.batch(el, f, Y.Dom, true);
+ },
+
+ /**
+ * Returns the width of the client (viewport).
+ * @method getClientWidth
+ * @deprecated Now using getViewportWidth. This interface left intact for back compat.
+ * @return {Int} The width of the viewable area of the page.
+ */
+ getClientWidth: function() {
+ return Y.Dom.getViewportWidth();
+ },
+
+ /**
+ * Returns the height of the client (viewport).
+ * @method getClientHeight
+ * @deprecated Now using getViewportHeight. This interface left intact for back compat.
+ * @return {Int} The height of the viewable area of the page.
+ */
+ getClientHeight: function() {
+ return Y.Dom.getViewportHeight();
+ },
+
+ /**
+ * Returns a array of HTMLElements with the given class.
+ * For optimized performance, include a tag and/or root node when possible.
+ * Note: This method operates against a live collection, so modifying the
+ * collection in the callback (removing/appending nodes, etc.) will have
+ * side effects. Instead you should iterate the returned nodes array,
+ * as you would with the native "getElementsByTagName" method.
+ * @method getElementsByClassName
+ * @param {String} className The class name to match against
+ * @param {String} tag (optional) The tag name of the elements being collected
+ * @param {String | HTMLElement} root (optional) The HTMLElement or an ID to use as the starting point
+ * @param {Function} apply (optional) A function to apply to each element when found
+ * @return {Array} An array of elements that have the given class name
+ */
+ getElementsByClassName: function(className, tag, root, apply) {
+ className = lang.trim(className);
+ tag = tag || '*';
+ root = (root) ? Y.Dom.get(root) : null || document;
+ if (!root) {
+ return [];
+ }
+
+ var nodes = [],
+ elements = root.getElementsByTagName(tag),
+ re = getClassRegEx(className);
+
+ for (var i = 0, len = elements.length; i < len; ++i) {
+ if ( re.test(elements[i].className) ) {
+ nodes[nodes.length] = elements[i];
+ if (apply) {
+ apply.call(elements[i], elements[i]);
+ }
+ }
+ }
+
+ return nodes;
+ },
+
+ /**
+ * Determines whether an HTMLElement has the given className.
+ * @method hasClass
+ * @param {String | HTMLElement | Array} el The element or collection to test
+ * @param {String} className the class name to search for
+ * @return {Boolean | Array} A boolean value or array of boolean values
+ */
+ hasClass: function(el, className) {
+ var re = getClassRegEx(className);
+
+ var f = function(el) {
+ return re.test(el.className);
+ };
+
+ return Y.Dom.batch(el, f, Y.Dom, true);
+ },
+
+ /**
+ * Adds a class name to a given element or collection of elements.
+ * @method addClass
+ * @param {String | HTMLElement | Array} el The element or collection to add the class to
+ * @param {String} className the class name to add to the class attribute
+ * @return {Boolean | Array} A pass/fail boolean or array of booleans
+ */
+ addClass: function(el, className) {
+ var f = function(el) {
+ if (this.hasClass(el, className)) {
+ return false; // already present
+ }
+
+
+ el.className = lang.trim([el.className, className].join(' '));
+ return true;
+ };
+
+ return Y.Dom.batch(el, f, Y.Dom, true);
+ },
+
+ /**
+ * Removes a class name from a given element or collection of elements.
+ * @method removeClass
+ * @param {String | HTMLElement | Array} el The element or collection to remove the class from
+ * @param {String} className the class name to remove from the class attribute
+ * @return {Boolean | Array} A pass/fail boolean or array of booleans
+ */
+ removeClass: function(el, className) {
+ var re = getClassRegEx(className);
+
+ var f = function(el) {
+ var ret = false,
+ current = el.className;
+
+ if (className && current && this.hasClass(el, className)) {
+
+ el.className = current.replace(re, ' ');
+ if ( this.hasClass(el, className) ) { // in case of multiple adjacent
+ this.removeClass(el, className);
+ }
+
+ el.className = lang.trim(el.className); // remove any trailing spaces
+ if (el.className === '') { // remove class attribute if empty
+ var attr = (el.hasAttribute) ? 'class' : 'className';
+ el.removeAttribute(attr);
+ }
+ ret = true;
+ }
+ return ret;
+ };
+
+ return Y.Dom.batch(el, f, Y.Dom, true);
+ },
+
+ /**
+ * Replace a class with another class for a given element or collection of elements.
+ * If no oldClassName is present, the newClassName is simply added.
+ * @method replaceClass
+ * @param {String | HTMLElement | Array} el The element or collection to remove the class from
+ * @param {String} oldClassName the class name to be replaced
+ * @param {String} newClassName the class name that will be replacing the old class name
+ * @return {Boolean | Array} A pass/fail boolean or array of booleans
+ */
+ replaceClass: function(el, oldClassName, newClassName) {
+ if (!newClassName || oldClassName === newClassName) { // avoid infinite loop
+ return false;
+ }
+
+ var re = getClassRegEx(oldClassName);
+
+ var f = function(el) {
+
+ if ( !this.hasClass(el, oldClassName) ) {
+ this.addClass(el, newClassName); // just add it if nothing to replace
+ return true; // NOTE: return
+ }
+
+ el.className = el.className.replace(re, ' ' + newClassName + ' ');
+
+ if ( this.hasClass(el, oldClassName) ) { // in case of multiple adjacent
+ this.removeClass(el, oldClassName);
+ }
+
+ el.className = lang.trim(el.className); // remove any trailing spaces
+ return true;
+ };
+
+ return Y.Dom.batch(el, f, Y.Dom, true);
+ },
+
+ /**
+ * Returns an ID and applies it to the element "el", if provided.
+ * @method generateId
+ * @param {String | HTMLElement | Array} el (optional) An optional element array of elements to add an ID to (no ID is added if one is already present).
+ * @param {String} prefix (optional) an optional prefix to use (defaults to "yui-gen").
+ * @return {String | Array} The generated ID, or array of generated IDs (or original ID if already present on an element)
+ */
+ generateId: function(el, prefix) {
+ prefix = prefix || 'yui-gen';
+
+ var f = function(el) {
+ if (el && el.id) { // do not override existing ID
+ return el.id;
+ }
+
+ var id = prefix + YAHOO.env._id_counter++;
+
+ if (el) {
+ el.id = id;
+ }
+
+ return id;
+ };
+
+ // batch fails when no element, so just generate and return single ID
+ return Y.Dom.batch(el, f, Y.Dom, true) || f.apply(Y.Dom, arguments);
+ },
+
+ /**
+ * Determines whether an HTMLElement is an ancestor of another HTML element in the DOM hierarchy.
+ * @method isAncestor
+ * @param {String | HTMLElement} haystack The possible ancestor
+ * @param {String | HTMLElement} needle The possible descendent
+ * @return {Boolean} Whether or not the haystack is an ancestor of needle
+ */
+ isAncestor: function(haystack, needle) {
+ haystack = Y.Dom.get(haystack);
+ needle = Y.Dom.get(needle);
+
+ var ret = false;
+
+ if ( (haystack && needle) && (haystack.nodeType && needle.nodeType) ) {
+ if (haystack.contains && haystack !== needle) { // contains returns true when equal
+ ret = haystack.contains(needle);
+ }
+ else if (haystack.compareDocumentPosition) { // gecko
+ ret = !!(haystack.compareDocumentPosition(needle) & 16);
+ }
+ } else {
+ }
+ return ret;
+ },
+
+ /**
+ * Determines whether an HTMLElement is present in the current document.
+ * @method inDocument
+ * @param {String | HTMLElement} el The element to search for
+ * @return {Boolean} Whether or not the element is present in the current document
+ */
+ inDocument: function(el) {
+ return this.isAncestor(document.documentElement, el);
+ },
+
+ /**
+ * Returns a array of HTMLElements that pass the test applied by supplied boolean method.
+ * For optimized performance, include a tag and/or root node when possible.
+ * Note: This method operates against a live collection, so modifying the
+ * collection in the callback (removing/appending nodes, etc.) will have
+ * side effects. Instead you should iterate the returned nodes array,
+ * as you would with the native "getElementsByTagName" method.
+ * @method getElementsBy
+ * @param {Function} method - A boolean method for testing elements which receives the element as its only argument.
+ * @param {String} tag (optional) The tag name of the elements being collected
+ * @param {String | HTMLElement} root (optional) The HTMLElement or an ID to use as the starting point
+ * @param {Function} apply (optional) A function to apply to each element when found
+ * @return {Array} Array of HTMLElements
+ */
+ getElementsBy: function(method, tag, root, apply) {
+ tag = tag || '*';
+ root = (root) ? Y.Dom.get(root) : null || document;
+
+ if (!root) {
+ return [];
+ }
+
+ var nodes = [],
+ elements = root.getElementsByTagName(tag);
+
+ for (var i = 0, len = elements.length; i < len; ++i) {
+ if ( method(elements[i]) ) {
+ nodes[nodes.length] = elements[i];
+ if (apply) {
+ apply(elements[i]);
+ }
+ }
+ }
+
+
+ return nodes;
+ },
+
+ /**
+ * Runs the supplied method against each item in the Collection/Array.
+ * The method is called with the element(s) as the first arg, and the optional param as the second ( method(el, o) ).
+ * @method batch
+ * @param {String | HTMLElement | Array} el (optional) An element or array of elements to apply the method to
+ * @param {Function} method The method to apply to the element(s)
+ * @param {Any} o (optional) An optional arg that is passed to the supplied method
+ * @param {Boolean} override (optional) Whether or not to override the scope of "method" with "o"
+ * @return {Any | Array} The return value(s) from the supplied method
+ */
+ batch: function(el, method, o, override) {
+ el = (el && (el.tagName || el.item)) ? el : Y.Dom.get(el); // skip get() when possible
+
+ if (!el || !method) {
+ return false;
+ }
+ var scope = (override) ? o : window;
+
+ if (el.tagName || el.length === undefined) { // element or not array-like
+ return method.call(scope, el, o);
+ }
+
+ var collection = [];
+
+ for (var i = 0, len = el.length; i < len; ++i) {
+ collection[collection.length] = method.call(scope, el[i], o);
+ }
+
+ return collection;
+ },
+
+ /**
+ * Returns the height of the document.
+ * @method getDocumentHeight
+ * @return {Int} The height of the actual document (which includes the body and its margin).
+ */
+ getDocumentHeight: function() {
+ var scrollHeight = (document.compatMode != 'CSS1Compat') ? document.body.scrollHeight : document.documentElement.scrollHeight;
+
+ var h = Math.max(scrollHeight, Y.Dom.getViewportHeight());
+ return h;
+ },
+
+ /**
+ * Returns the width of the document.
+ * @method getDocumentWidth
+ * @return {Int} The width of the actual document (which includes the body and its margin).
+ */
+ getDocumentWidth: function() {
+ var scrollWidth = (document.compatMode != 'CSS1Compat') ? document.body.scrollWidth : document.documentElement.scrollWidth;
+ var w = Math.max(scrollWidth, Y.Dom.getViewportWidth());
+ return w;
+ },
+
+ /**
+ * Returns the current height of the viewport.
+ * @method getViewportHeight
+ * @return {Int} The height of the viewable area of the page (excludes scrollbars).
+ */
+ getViewportHeight: function() {
+ var height = self.innerHeight; // Safari, Opera
+ var mode = document.compatMode;
+
+ if ( (mode || isIE) && !isOpera ) { // IE, Gecko
+ height = (mode == 'CSS1Compat') ?
+ document.documentElement.clientHeight : // Standards
+ document.body.clientHeight; // Quirks
+ }
+
+ return height;
+ },
+
+ /**
+ * Returns the current width of the viewport.
+ * @method getViewportWidth
+ * @return {Int} The width of the viewable area of the page (excludes scrollbars).
+ */
+
+ getViewportWidth: function() {
+ var width = self.innerWidth; // Safari
+ var mode = document.compatMode;
+
+ if (mode || isIE) { // IE, Gecko, Opera
+ width = (mode == 'CSS1Compat') ?
+ document.documentElement.clientWidth : // Standards
+ document.body.clientWidth; // Quirks
+ }
+ return width;
+ },
+
+ /**
+ * Returns the nearest ancestor that passes the test applied by supplied boolean method.
+ * For performance reasons, IDs are not accepted and argument validation omitted.
+ * @method getAncestorBy
+ * @param {HTMLElement} node The HTMLElement to use as the starting point
+ * @param {Function} method - A boolean method for testing elements which receives the element as its only argument.
+ * @return {Object} HTMLElement or null if not found
+ */
+ getAncestorBy: function(node, method) {
+ while ( (node = node.parentNode) ) { // NOTE: assignment
+ if ( testElement(node, method) ) {
+ return node;
+ }
+ }
+
+ return null;
+ },
+
+ /**
+ * Returns the nearest ancestor with the given className.
+ * @method getAncestorByClassName
+ * @param {String | HTMLElement} node The HTMLElement or an ID to use as the starting point
+ * @param {String} className
+ * @return {Object} HTMLElement
+ */
+ getAncestorByClassName: function(node, className) {
+ node = Y.Dom.get(node);
+ if (!node) {
+ return null;
+ }
+ var method = function(el) { return Y.Dom.hasClass(el, className); };
+ return Y.Dom.getAncestorBy(node, method);
+ },
+
+ /**
+ * Returns the nearest ancestor with the given tagName.
+ * @method getAncestorByTagName
+ * @param {String | HTMLElement} node The HTMLElement or an ID to use as the starting point
+ * @param {String} tagName
+ * @return {Object} HTMLElement
+ */
+ getAncestorByTagName: function(node, tagName) {
+ node = Y.Dom.get(node);
+ if (!node) {
+ return null;
+ }
+ var method = function(el) {
+ return el.tagName && el.tagName.toUpperCase() == tagName.toUpperCase();
+ };
+
+ return Y.Dom.getAncestorBy(node, method);
+ },
+
+ /**
+ * Returns the previous sibling that is an HTMLElement.
+ * For performance reasons, IDs are not accepted and argument validation omitted.
+ * Returns the nearest HTMLElement sibling if no method provided.
+ * @method getPreviousSiblingBy
+ * @param {HTMLElement} node The HTMLElement to use as the starting point
+ * @param {Function} method A boolean function used to test siblings
+ * that receives the sibling node being tested as its only argument
+ * @return {Object} HTMLElement or null if not found
+ */
+ getPreviousSiblingBy: function(node, method) {
+ while (node) {
+ node = node.previousSibling;
+ if ( testElement(node, method) ) {
+ return node;
+ }
+ }
+ return null;
+ },
+
+ /**
+ * Returns the previous sibling that is an HTMLElement
+ * @method getPreviousSibling
+ * @param {String | HTMLElement} node The HTMLElement or an ID to use as the starting point
+ * @return {Object} HTMLElement or null if not found
+ */
+ getPreviousSibling: function(node) {
+ node = Y.Dom.get(node);
+ if (!node) {
+ return null;
+ }
+
+ return Y.Dom.getPreviousSiblingBy(node);
+ },
+
+ /**
+ * Returns the next HTMLElement sibling that passes the boolean method.
+ * For performance reasons, IDs are not accepted and argument validation omitted.
+ * Returns the nearest HTMLElement sibling if no method provided.
+ * @method getNextSiblingBy
+ * @param {HTMLElement} node The HTMLElement to use as the starting point
+ * @param {Function} method A boolean function used to test siblings
+ * that receives the sibling node being tested as its only argument
+ * @return {Object} HTMLElement or null if not found
+ */
+ getNextSiblingBy: function(node, method) {
+ while (node) {
+ node = node.nextSibling;
+ if ( testElement(node, method) ) {
+ return node;
+ }
+ }
+ return null;
+ },
+
+ /**
+ * Returns the next sibling that is an HTMLElement
+ * @method getNextSibling
+ * @param {String | HTMLElement} node The HTMLElement or an ID to use as the starting point
+ * @return {Object} HTMLElement or null if not found
+ */
+ getNextSibling: function(node) {
+ node = Y.Dom.get(node);
+ if (!node) {
+ return null;
+ }
+
+ return Y.Dom.getNextSiblingBy(node);
+ },
+
+ /**
+ * Returns the first HTMLElement child that passes the test method.
+ * @method getFirstChildBy
+ * @param {HTMLElement} node The HTMLElement to use as the starting point
+ * @param {Function} method A boolean function used to test children
+ * that receives the node being tested as its only argument
+ * @return {Object} HTMLElement or null if not found
+ */
+ getFirstChildBy: function(node, method) {
+ var child = ( testElement(node.firstChild, method) ) ? node.firstChild : null;
+ return child || Y.Dom.getNextSiblingBy(node.firstChild, method);
+ },
+
+ /**
+ * Returns the first HTMLElement child.
+ * @method getFirstChild
+ * @param {String | HTMLElement} node The HTMLElement or an ID to use as the starting point
+ * @return {Object} HTMLElement or null if not found
+ */
+ getFirstChild: function(node, method) {
+ node = Y.Dom.get(node);
+ if (!node) {
+ return null;
+ }
+ return Y.Dom.getFirstChildBy(node);
+ },
+
+ /**
+ * Returns the last HTMLElement child that passes the test method.
+ * @method getLastChildBy
+ * @param {HTMLElement} node The HTMLElement to use as the starting point
+ * @param {Function} method A boolean function used to test children
+ * that receives the node being tested as its only argument
+ * @return {Object} HTMLElement or null if not found
+ */
+ getLastChildBy: function(node, method) {
+ if (!node) {
+ return null;
+ }
+ var child = ( testElement(node.lastChild, method) ) ? node.lastChild : null;
+ return child || Y.Dom.getPreviousSiblingBy(node.lastChild, method);
+ },
+
+ /**
+ * Returns the last HTMLElement child.
+ * @method getLastChild
+ * @param {String | HTMLElement} node The HTMLElement or an ID to use as the starting point
+ * @return {Object} HTMLElement or null if not found
+ */
+ getLastChild: function(node) {
+ node = Y.Dom.get(node);
+ return Y.Dom.getLastChildBy(node);
+ },
+
+ /**
+ * Returns an array of HTMLElement childNodes that pass the test method.
+ * @method getChildrenBy
+ * @param {HTMLElement} node The HTMLElement to start from
+ * @param {Function} method A boolean function used to test children
+ * that receives the node being tested as its only argument
+ * @return {Array} A static array of HTMLElements
+ */
+ getChildrenBy: function(node, method) {
+ var child = Y.Dom.getFirstChildBy(node, method);
+ var children = child ? [child] : [];
+
+ Y.Dom.getNextSiblingBy(child, function(node) {
+ if ( !method || method(node) ) {
+ children[children.length] = node;
+ }
+ return false; // fail test to collect all children
+ });
+
+ return children;
+ },
+
+ /**
+ * Returns an array of HTMLElement childNodes.
+ * @method getChildren
+ * @param {String | HTMLElement} node The HTMLElement or an ID to use as the starting point
+ * @return {Array} A static array of HTMLElements
+ */
+ getChildren: function(node) {
+ node = Y.Dom.get(node);
+ if (!node) {
+ }
+
+ return Y.Dom.getChildrenBy(node);
+ },
+
+ /**
+ * Returns the left scroll value of the document
+ * @method getDocumentScrollLeft
+ * @param {HTMLDocument} document (optional) The document to get the scroll value of
+ * @return {Int} The amount that the document is scrolled to the left
+ */
+ getDocumentScrollLeft: function(doc) {
+ doc = doc || document;
+ return Math.max(doc.documentElement.scrollLeft, doc.body.scrollLeft);
+ },
+
+ /**
+ * Returns the top scroll value of the document
+ * @method getDocumentScrollTop
+ * @param {HTMLDocument} document (optional) The document to get the scroll value of
+ * @return {Int} The amount that the document is scrolled to the top
+ */
+ getDocumentScrollTop: function(doc) {
+ doc = doc || document;
+ return Math.max(doc.documentElement.scrollTop, doc.body.scrollTop);
+ },
+
+ /**
+ * Inserts the new node as the previous sibling of the reference node
+ * @method insertBefore
+ * @param {String | HTMLElement} newNode The node to be inserted
+ * @param {String | HTMLElement} referenceNode The node to insert the new node before
+ * @return {HTMLElement} The node that was inserted (or null if insert fails)
+ */
+ insertBefore: function(newNode, referenceNode) {
+ newNode = Y.Dom.get(newNode);
+ referenceNode = Y.Dom.get(referenceNode);
+
+ if (!newNode || !referenceNode || !referenceNode.parentNode) {
+ return null;
+ }
+
+ return referenceNode.parentNode.insertBefore(newNode, referenceNode);
+ },
+
+ /**
+ * Inserts the new node as the next sibling of the reference node
+ * @method insertAfter
+ * @param {String | HTMLElement} newNode The node to be inserted
+ * @param {String | HTMLElement} referenceNode The node to insert the new node after
+ * @return {HTMLElement} The node that was inserted (or null if insert fails)
+ */
+ insertAfter: function(newNode, referenceNode) {
+ newNode = Y.Dom.get(newNode);
+ referenceNode = Y.Dom.get(referenceNode);
+
+ if (!newNode || !referenceNode || !referenceNode.parentNode) {
+ return null;
+ }
+
+ if (referenceNode.nextSibling) {
+ return referenceNode.parentNode.insertBefore(newNode, referenceNode.nextSibling);
+ } else {
+ return referenceNode.parentNode.appendChild(newNode);
+ }
+ },
+
+ /**
+ * Creates a Region based on the viewport relative to the document.
+ * @method getClientRegion
+ * @return {Region} A Region object representing the viewport which accounts for document scroll
+ */
+ getClientRegion: function() {
+ var t = Y.Dom.getDocumentScrollTop(),
+ l = Y.Dom.getDocumentScrollLeft(),
+ r = Y.Dom.getViewportWidth() + l,
+ b = Y.Dom.getViewportHeight() + t;
+
+ return new Y.Region(t, r, b, l);
+ }
+ };
+
+ var getXY = function() {
+ if (document.documentElement.getBoundingClientRect) { // IE
+ return function(el) {
+ var box = el.getBoundingClientRect(),
+ round = Math.round;
+
+ var rootNode = el.ownerDocument;
+ return [round(box.left + Y.Dom.getDocumentScrollLeft(rootNode)), round(box.top +
+ Y.Dom.getDocumentScrollTop(rootNode))];
+ };
+ } else {
+ return function(el) { // manually calculate by crawling up offsetParents
+ var pos = [el.offsetLeft, el.offsetTop];
+ var parentNode = el.offsetParent;
+
+ // safari: subtract body offsets if el is abs (or any offsetParent), unless body is offsetParent
+ var accountForBody = (isSafari &&
+ Y.Dom.getStyle(el, 'position') == 'absolute' &&
+ el.offsetParent == el.ownerDocument.body);
+
+ if (parentNode != el) {
+ while (parentNode) {
+ pos[0] += parentNode.offsetLeft;
+ pos[1] += parentNode.offsetTop;
+ if (!accountForBody && isSafari &&
+ Y.Dom.getStyle(parentNode,'position') == 'absolute' ) {
+ accountForBody = true;
+ }
+ parentNode = parentNode.offsetParent;
+ }
+ }
+
+ if (accountForBody) { //safari doubles in this case
+ pos[0] -= el.ownerDocument.body.offsetLeft;
+ pos[1] -= el.ownerDocument.body.offsetTop;
+ }
+ parentNode = el.parentNode;
+
+ // account for any scrolled ancestors
+ while ( parentNode.tagName && !patterns.ROOT_TAG.test(parentNode.tagName) )
+ {
+ if (parentNode.scrollTop || parentNode.scrollLeft) {
+ pos[0] -= parentNode.scrollLeft;
+ pos[1] -= parentNode.scrollTop;
+ }
+
+ parentNode = parentNode.parentNode;
+ }
+
+ return pos;
+ };
+ }
+ }() // NOTE: Executing for loadtime branching
+})();
+/**
+ * A region is a representation of an object on a grid. It is defined
+ * by the top, right, bottom, left extents, so is rectangular by default. If
+ * other shapes are required, this class could be extended to support it.
+ * @namespace YAHOO.util
+ * @class Region
+ * @param {Int} t the top extent
+ * @param {Int} r the right extent
+ * @param {Int} b the bottom extent
+ * @param {Int} l the left extent
+ * @constructor
+ */
+YAHOO.util.Region = function(t, r, b, l) {
+
+ /**
+ * The region's top extent
+ * @property top
+ * @type Int
+ */
+ this.top = t;
+
+ /**
+ * The region's top extent as index, for symmetry with set/getXY
+ * @property 1
+ * @type Int
+ */
+ this[1] = t;
+
+ /**
+ * The region's right extent
+ * @property right
+ * @type int
+ */
+ this.right = r;
+
+ /**
+ * The region's bottom extent
+ * @property bottom
+ * @type Int
+ */
+ this.bottom = b;
+
+ /**
+ * The region's left extent
+ * @property left
+ * @type Int
+ */
+ this.left = l;
+
+ /**
+ * The region's left extent as index, for symmetry with set/getXY
+ * @property 0
+ * @type Int
+ */
+ this[0] = l;
+};
+
+/**
+ * Returns true if this region contains the region passed in
+ * @method contains
+ * @param {Region} region The region to evaluate
+ * @return {Boolean} True if the region is contained with this region,
+ * else false
+ */
+YAHOO.util.Region.prototype.contains = function(region) {
+ return ( region.left >= this.left &&
+ region.right <= this.right &&
+ region.top >= this.top &&
+ region.bottom <= this.bottom );
+
+};
+
+/**
+ * Returns the area of the region
+ * @method getArea
+ * @return {Int} the region's area
+ */
+YAHOO.util.Region.prototype.getArea = function() {
+ return ( (this.bottom - this.top) * (this.right - this.left) );
+};
+
+/**
+ * Returns the region where the passed in region overlaps with this one
+ * @method intersect
+ * @param {Region} region The region that intersects
+ * @return {Region} The overlap region, or null if there is no overlap
+ */
+YAHOO.util.Region.prototype.intersect = function(region) {
+ var t = Math.max( this.top, region.top );
+ var r = Math.min( this.right, region.right );
+ var b = Math.min( this.bottom, region.bottom );
+ var l = Math.max( this.left, region.left );
+
+ if (b >= t && r >= l) {
+ return new YAHOO.util.Region(t, r, b, l);
+ } else {
+ return null;
+ }
+};
+
+/**
+ * Returns the region representing the smallest region that can contain both
+ * the passed in region and this region.
+ * @method union
+ * @param {Region} region The region that to create the union with
+ * @return {Region} The union region
+ */
+YAHOO.util.Region.prototype.union = function(region) {
+ var t = Math.min( this.top, region.top );
+ var r = Math.max( this.right, region.right );
+ var b = Math.max( this.bottom, region.bottom );
+ var l = Math.min( this.left, region.left );
+
+ return new YAHOO.util.Region(t, r, b, l);
+};
+
+/**
+ * toString
+ * @method toString
+ * @return string the region properties
+ */
+YAHOO.util.Region.prototype.toString = function() {
+ return ( "Region {" +
+ "top: " + this.top +
+ ", right: " + this.right +
+ ", bottom: " + this.bottom +
+ ", left: " + this.left +
+ "}" );
+};
+
+/**
+ * Returns a region that is occupied by the DOM element
+ * @method getRegion
+ * @param {HTMLElement} el The element
+ * @return {Region} The region that the element occupies
+ * @static
+ */
+YAHOO.util.Region.getRegion = function(el) {
+ var p = YAHOO.util.Dom.getXY(el);
+
+ var t = p[1];
+ var r = p[0] + el.offsetWidth;
+ var b = p[1] + el.offsetHeight;
+ var l = p[0];
+
+ return new YAHOO.util.Region(t, r, b, l);
+};
+
+/////////////////////////////////////////////////////////////////////////////
+
+
+/**
+ * A point is a region that is special in that it represents a single point on
+ * the grid.
+ * @namespace YAHOO.util
+ * @class Point
+ * @param {Int} x The X position of the point
+ * @param {Int} y The Y position of the point
+ * @constructor
+ * @extends YAHOO.util.Region
+ */
+YAHOO.util.Point = function(x, y) {
+ if (YAHOO.lang.isArray(x)) { // accept input from Dom.getXY, Event.getXY, etc.
+ y = x[1]; // dont blow away x yet
+ x = x[0];
+ }
+
+ /**
+ * The X position of the point, which is also the right, left and index zero (for Dom.getXY symmetry)
+ * @property x
+ * @type Int
+ */
+
+ this.x = this.right = this.left = this[0] = x;
+
+ /**
+ * The Y position of the point, which is also the top, bottom and index one (for Dom.getXY symmetry)
+ * @property y
+ * @type Int
+ */
+ this.y = this.top = this.bottom = this[1] = y;
+};
+
+YAHOO.util.Point.prototype = new YAHOO.util.Region();
+
+YAHOO.register("dom", YAHOO.util.Dom, {version: "2.6.0", build: "1321"});
generated by cgit v1.1 at 2025-01-18 13:07:01 +0000