/*
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"});
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