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Giulio Cesare Solaroli
2011-10-03 00:56:18 +01:00
parent 597ecfbc02
commit ef68436ac0
729 changed files with 232898 additions and 0 deletions
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/*
Copyright (c) 2006, Yahoo! Inc. All rights reserved.
Code licensed under the BSD License:
http://developer.yahoo.net/yui/license.txt
version: 0.12.0
*/
/**
* @description
* The Connection Manager provides a simplified interface to the XMLHttpRequest
* object. It handles cross-browser instantiantion of XMLHttpRequest, negotiates the
* interactive states and server response, returning the results to a pre-defined
* callback you create.
*
* @namespace YAHOO.util
* @module Connection
* @Class Connect
*/
YAHOO.util.Connect =
{
/**
* @description Array of MSFT ActiveX ids for XMLHttpRequest.
* @property _msxml_progid
* @private
* @static
* @type array
*/
_msxml_progid:[
'MSXML2.XMLHTTP.3.0',
'MSXML2.XMLHTTP',
'Microsoft.XMLHTTP'
],
/**
* @description Object literal of HTTP header(s)
* @property _http_header
* @private
* @static
* @type object
*/
_http_header:{},
/**
* @description Determines if HTTP headers are set.
* @property _has_http_headers
* @private
* @static
* @type boolean
*/
_has_http_headers:false,
/**
* @description Determines if a default header of
* Content-Type of 'application/x-www-form-urlencoded'
* will be added to any client HTTP headers sent for POST
* transactions.
* @property _use_default_post_header
* @private
* @static
* @type boolean
*/
_use_default_post_header:true,
/**
* @description Determines if a default header of
* Content-Type of 'application/x-www-form-urlencoded'
* will be added to any client HTTP headers sent for POST
* transactions.
* @property _default_post_header
* @private
* @static
* @type boolean
*/
_default_post_header:'application/x-www-form-urlencoded',
/**
* @description Property modified by setForm() to determine if the data
* should be submitted as an HTML form.
* @property _isFormSubmit
* @private
* @static
* @type boolean
*/
_isFormSubmit:false,
/**
* @description Property modified by setForm() to determine if a file(s)
* upload is expected.
* @property _isFileUpload
* @private
* @static
* @type boolean
*/
_isFileUpload:false,
/**
* @description Property modified by setForm() to set a reference to the HTML
* form node if the desired action is file upload.
* @property _formNode
* @private
* @static
* @type object
*/
_formNode:null,
/**
* @description Property modified by setForm() to set the HTML form data
* for each transaction.
* @property _sFormData
* @private
* @static
* @type string
*/
_sFormData:null,
/**
* @description Collection of polling references to the polling mechanism in handleReadyState.
* @property _poll
* @private
* @static
* @type object
*/
_poll:{},
/**
* @description Queue of timeout values for each transaction callback with a defined timeout value.
* @property _timeOut
* @private
* @static
* @type object
*/
_timeOut:{},
/**
* @description The polling frequency, in milliseconds, for HandleReadyState.
* when attempting to determine a transaction's XHR readyState.
* The default is 50 milliseconds.
* @property _polling_interval
* @private
* @static
* @type int
*/
_polling_interval:50,
/**
* @description A transaction counter that increments the transaction id for each transaction.
* @property _transaction_id
* @private
* @static
* @type int
*/
_transaction_id:0,
/**
* @description Member to add an ActiveX id to the existing xml_progid array.
* In the event(unlikely) a new ActiveX id is introduced, it can be added
* without internal code modifications.
* @method setProgId
* @public
* @static
* @param {string} id The ActiveX id to be added to initialize the XHR object.
* @return void
*/
setProgId:function(id)
{
this._msxml_progid.unshift(id);
},
/**
* @description Member to enable or disable the default POST header.
* @method setDefaultPostHeader
* @public
* @static
* @param {boolean} b Set and use default header - true or false .
* @return void
*/
setDefaultPostHeader:function(b)
{
this._use_default_post_header = b;
},
/**
* @description Member to modify the default polling interval.
* @method setPollingInterval
* @public
* @static
* @param {int} i The polling interval in milliseconds.
* @return void
*/
setPollingInterval:function(i)
{
if(typeof i == 'number' && isFinite(i)){
this._polling_interval = i;
}
},
/**
* @description Instantiates a XMLHttpRequest object and returns an object with two properties:
* the XMLHttpRequest instance and the transaction id.
* @method createXhrObject
* @private
* @static
* @param {int} transactionId Property containing the transaction id for this transaction.
* @return object
*/
createXhrObject:function(transactionId)
{
var obj,http;
try
{
// Instantiates XMLHttpRequest in non-IE browsers and assigns to http.
http = new XMLHttpRequest();
// Object literal with http and tId properties
obj = { conn:http, tId:transactionId };
}
catch(e)
{
for(var i=0; i<this._msxml_progid.length; ++i){
try
{
// Instantiates XMLHttpRequest for IE and assign to http.
http = new ActiveXObject(this._msxml_progid[i]);
// Object literal with conn and tId properties
obj = { conn:http, tId:transactionId };
break;
}
catch(e){}
}
}
finally
{
return obj;
}
},
/**
* @description This method is called by asyncRequest to create a
* valid connection object for the transaction. It also passes a
* transaction id and increments the transaction id counter.
* @method getConnectionObject
* @private
* @static
* @return {object}
*/
getConnectionObject:function()
{
var o;
var tId = this._transaction_id;
try
{
o = this.createXhrObject(tId);
if(o){
this._transaction_id++;
}
}
catch(e){}
finally
{
return o;
}
},
/**
* @description Method for initiating an asynchronous request via the XHR object.
* @method asyncRequest
* @public
* @static
* @param {string} method HTTP transaction method
* @param {string} uri Fully qualified path of resource
* @param {callback} callback User-defined callback function or object
* @param {string} postData POST body
* @return {object} Returns the connection object
*/
asyncRequest:function(method, uri, callback, postData)
{
var o = this.getConnectionObject();
if(!o){
return null;
}
else{
if(this._isFormSubmit){
if(this._isFileUpload){
this.uploadFile(o.tId, callback, uri, postData);
this.releaseObject(o);
return;
}
//If the specified HTTP method is GET, setForm() will return an
//encoded string that is concatenated to the uri to
//create a querystring.
if(method == 'GET'){
if(this._sFormData.length != 0){
// If the URI already contains a querystring, append an ampersand
// and then concatenate _sFormData to the URI.
uri += ((uri.indexOf('?') == -1)?'?':'&') + this._sFormData;
}
else{
uri += "?" + this._sFormData;
}
}
else if(method == 'POST'){
//If POST data exist in addition to the HTML form data,
//it will be concatenated to the form data.
postData = postData?this._sFormData + "&" + postData:this._sFormData;
}
}
o.conn.open(method, uri, true);
if(this._isFormSubmit || (postData && this._use_default_post_header)){
this.initHeader('Content-Type', this._default_post_header);
if(this._isFormSubmit){
this.resetFormState();
}
}
if(this._has_http_headers){
this.setHeader(o);
}
this.handleReadyState(o, callback);
o.conn.send(postData || null);
return o;
}
},
/**
* @description This method serves as a timer that polls the XHR object's readyState
* property during a transaction, instead of binding a callback to the
* onreadystatechange event. Upon readyState 4, handleTransactionResponse
* will process the response, and the timer will be cleared.
* @method handleReadyState
* @private
* @static
* @param {object} o The connection object
* @param {callback} callback The user-defined callback object
* @return {void}
*/
handleReadyState:function(o, callback)
{
var oConn = this;
if(callback && callback.timeout){
this._timeOut[o.tId] = window.setTimeout(function(){ oConn.abort(o, callback, true); }, callback.timeout);
}
this._poll[o.tId] = window.setInterval(
function(){
if(o.conn && o.conn.readyState == 4){
window.clearInterval(oConn._poll[o.tId]);
delete oConn._poll[o.tId];
if(callback && callback.timeout){
delete oConn._timeOut[o.tId];
}
oConn.handleTransactionResponse(o, callback);
}
}
,this._polling_interval);
},
/**
* @description This method attempts to interpret the server response and
* determine whether the transaction was successful, or if an error or
* exception was encountered.
* @method handleTransactionResponse
* @private
* @static
* @param {object} o The connection object
* @param {object} callback The sser-defined callback object
* @param {boolean} isAbort Determines if the transaction was aborted.
* @return {void}
*/
handleTransactionResponse:function(o, callback, isAbort)
{
// If no valid callback is provided, then do not process any callback handling.
if(!callback){
this.releaseObject(o);
return;
}
var httpStatus, responseObject;
try
{
if(o.conn.status !== undefined && o.conn.status != 0){
httpStatus = o.conn.status;
}
else{
httpStatus = 13030;
}
}
catch(e){
// 13030 is the custom code to indicate the condition -- in Mozilla/FF --
// when the o object's status and statusText properties are
// unavailable, and a query attempt throws an exception.
httpStatus = 13030;
}
if(httpStatus >= 200 && httpStatus < 300){
try
{
responseObject = this.createResponseObject(o, callback.argument);
if(callback.success){
if(!callback.scope){
callback.success(responseObject);
}
else{
// If a scope property is defined, the callback will be fired from
// the context of the object.
callback.success.apply(callback.scope, [responseObject]);
}
}
}
catch(e){}
}
else{
try
{
switch(httpStatus){
// The following cases are wininet.dll error codes that may be encountered.
case 12002: // Server timeout
case 12029: // 12029 to 12031 correspond to dropped connections.
case 12030:
case 12031:
case 12152: // Connection closed by server.
case 13030: // See above comments for variable status.
responseObject = this.createExceptionObject(o.tId, callback.argument, (isAbort?isAbort:false));
if(callback.failure){
if(!callback.scope){
callback.failure(responseObject);
}
else{
callback.failure.apply(callback.scope, [responseObject]);
}
}
break;
default:
responseObject = this.createResponseObject(o, callback.argument);
if(callback.failure){
if(!callback.scope){
callback.failure(responseObject);
}
else{
callback.failure.apply(callback.scope, [responseObject]);
}
}
}
}
catch(e){}
}
this.releaseObject(o);
responseObject = null;
},
/**
* @description This method evaluates the server response, creates and returns the results via
* its properties. Success and failure cases will differ in the response
* object's property values.
* @method createResponseObject
* @private
* @static
* @param {object} o The connection object
* @param {callbackArg} callbackArg The user-defined argument or arguments to be passed to the callback
* @return {object}
*/
createResponseObject:function(o, callbackArg)
{
var obj = {};
var headerObj = {};
try
{
var headerStr = o.conn.getAllResponseHeaders();
var header = headerStr.split('\n');
for(var i=0; i<header.length; i++){
var delimitPos = header[i].indexOf(':');
if(delimitPos != -1){
headerObj[header[i].substring(0,delimitPos)] = header[i].substring(delimitPos+2);
}
}
}
catch(e){}
obj.tId = o.tId;
obj.status = o.conn.status;
obj.statusText = o.conn.statusText;
obj.getResponseHeader = headerObj;
obj.getAllResponseHeaders = headerStr;
obj.responseText = o.conn.responseText;
obj.responseXML = o.conn.responseXML;
if(typeof callbackArg !== undefined){
obj.argument = callbackArg;
}
return obj;
},
/**
* @description If a transaction cannot be completed due to dropped or closed connections,
* there may be not be enough information to build a full response object.
* The failure callback will be fired and this specific condition can be identified
* by a status property value of 0.
*
* If an abort was successful, the status property will report a value of -1.
*
* @method createExceptionObject
* @private
* @static
* @param {int} tId The Transaction Id
* @param {callbackArg} callbackArg The user-defined argument or arguments to be passed to the callback
* @param {boolean} isAbort Determines if the exception case is caused by a transaction abort
* @return {object}
*/
createExceptionObject:function(tId, callbackArg, isAbort)
{
var COMM_CODE = 0;
var COMM_ERROR = 'communication failure';
var ABORT_CODE = -1;
var ABORT_ERROR = 'transaction aborted';
var obj = {};
obj.tId = tId;
if(isAbort){
obj.status = ABORT_CODE;
obj.statusText = ABORT_ERROR;
}
else{
obj.status = COMM_CODE;
obj.statusText = COMM_ERROR;
}
if(callbackArg){
obj.argument = callbackArg;
}
return obj;
},
/**
* @description Public method that stores the custom HTTP headers for each transaction.
* @method initHeader
* @public
* @static
* @param {string} label The HTTP header label
* @param {string} value The HTTP header value
* @return {void}
*/
initHeader:function(label,value)
{
if(this._http_header[label] === undefined){
this._http_header[label] = value;
}
else{
// Concatenate multiple values, comma-delimited,
// for the same header label,
this._http_header[label] = value + "," + this._http_header[label];
}
this._has_http_headers = true;
},
/**
* @description Accessor that sets the HTTP headers for each transaction.
* @method setHeader
* @private
* @static
* @param {object} o The connection object for the transaction.
* @return {void}
*/
setHeader:function(o)
{
for(var prop in this._http_header){
if(this._http_header.hasOwnProperty(prop)){
o.conn.setRequestHeader(prop, this._http_header[prop]);
}
}
delete this._http_header;
this._http_header = {};
this._has_http_headers = false;
},
/**
* @description This method assembles the form label and value pairs and
* constructs an encoded string.
* asyncRequest() will automatically initialize the
* transaction with a HTTP header Content-Type of
* application/x-www-form-urlencoded.
* @method setForm
* @public
* @static
* @param {string || object} form id or name attribute, or form object.
* @param {string} optional boolean to indicate SSL environment.
* @param {string || boolean} optional qualified path of iframe resource for SSL in IE.
* @return {string} string of the HTML form field name and value pairs..
*/
setForm:function(formId, isUpload, secureUri)
{
this.resetFormState();
var oForm;
if(typeof formId == 'string'){
// Determine if the argument is a form id or a form name.
// Note form name usage is deprecated by supported
// here for legacy reasons.
oForm = (document.getElementById(formId) || document.forms[formId]);
}
else if(typeof formId == 'object'){
// Treat argument as an HTML form object.
oForm = formId;
}
else{
return;
}
// If the isUpload argument is true, setForm will call createFrame to initialize
// an iframe as the form target.
//
// The argument secureURI is also required by IE in SSL environments
// where the secureURI string is a fully qualified HTTP path, used to set the source
// of the iframe, to a stub resource in the same domain.
if(isUpload){
// Create iframe in preparation for file upload.
this.createFrame(secureUri?secureUri:null);
// Set form reference and file upload properties to true.
this._isFormSubmit = true;
this._isFileUpload = true;
this._formNode = oForm;
return;
}
var oElement, oName, oValue, oDisabled;
var hasSubmit = false;
// Iterate over the form elements collection to construct the
// label-value pairs.
for (var i=0; i<oForm.elements.length; i++){
oElement = oForm.elements[i];
oDisabled = oForm.elements[i].disabled;
oName = oForm.elements[i].name;
oValue = oForm.elements[i].value;
// Do not submit fields that are disabled or
// do not have a name attribute value.
if(!oDisabled && oName)
{
switch (oElement.type)
{
case 'select-one':
case 'select-multiple':
for(var j=0; j<oElement.options.length; j++){
if(oElement.options[j].selected){
if(window.ActiveXObject){
this._sFormData += encodeURIComponent(oName) + '=' + encodeURIComponent(oElement.options[j].attributes['value'].specified?oElement.options[j].value:oElement.options[j].text) + '&';
}
else{
this._sFormData += encodeURIComponent(oName) + '=' + encodeURIComponent(oElement.options[j].hasAttribute('value')?oElement.options[j].value:oElement.options[j].text) + '&';
}
}
}
break;
case 'radio':
case 'checkbox':
if(oElement.checked){
this._sFormData += encodeURIComponent(oName) + '=' + encodeURIComponent(oValue) + '&';
}
break;
case 'file':
// stub case as XMLHttpRequest will only send the file path as a string.
case undefined:
// stub case for fieldset element which returns undefined.
case 'reset':
// stub case for input type reset button.
case 'button':
// stub case for input type button elements.
break;
case 'submit':
if(hasSubmit == false){
this._sFormData += encodeURIComponent(oName) + '=' + encodeURIComponent(oValue) + '&';
hasSubmit = true;
}
break;
default:
this._sFormData += encodeURIComponent(oName) + '=' + encodeURIComponent(oValue) + '&';
break;
}
}
}
this._isFormSubmit = true;
this._sFormData = this._sFormData.substr(0, this._sFormData.length - 1);
return this._sFormData;
},
/**
* @description Resets HTML form properties when an HTML form or HTML form
* with file upload transaction is sent.
* @method resetFormState
* @private
* @static
* @return {void}
*/
resetFormState:function(){
this._isFormSubmit = false;
this._isFileUpload = false;
this._formNode = null;
this._sFormData = "";
},
/**
* @description Creates an iframe to be used for form file uploads. It is remove from the
* document upon completion of the upload transaction.
* @method createFrame
* @private
* @static
* @param {string} secureUri Optional qualified path of iframe resource for SSL in IE.
* @return {void}
*/
createFrame:function(secureUri){
// IE does not allow the setting of id and name attributes as object
// properties via createElement(). A different iframe creation
// pattern is required for IE.
var frameId = 'yuiIO' + this._transaction_id;
if(window.ActiveXObject){
var io = document.createElement('<iframe id="' + frameId + '" name="' + frameId + '" />');
// IE will throw a security exception in an SSL environment if the
// iframe source is undefined.
if(typeof secureUri == 'boolean'){
io.src = 'javascript:false';
}
else if(typeof secureURI == 'string'){
// Deprecated
io.src = secureUri;
}
}
else{
var io = document.createElement('iframe');
io.id = frameId;
io.name = frameId;
}
io.style.position = 'absolute';
io.style.top = '-1000px';
io.style.left = '-1000px';
document.body.appendChild(io);
},
/**
* @description Parses the POST data and creates hidden form elements
* for each key-value, and appends them to the HTML form object.
* @method appendPostData
* @private
* @static
* @param {string} postData The HTTP POST data
* @return {array} formElements Collection of hidden fields.
*/
appendPostData:function(postData)
{
var formElements = new Array();
var postMessage = postData.split('&');
for(var i=0; i < postMessage.length; i++){
var delimitPos = postMessage[i].indexOf('=');
if(delimitPos != -1){
formElements[i] = document.createElement('input');
formElements[i].type = 'hidden';
formElements[i].name = postMessage[i].substring(0,delimitPos);
formElements[i].value = postMessage[i].substring(delimitPos+1);
this._formNode.appendChild(formElements[i]);
}
}
return formElements;
},
/**
* @description Uploads HTML form, including files/attachments, to the
* iframe created in createFrame.
* @method uploadFile
* @private
* @static
* @param {int} id The transaction id.
* @param {object} callback - User-defined callback object.
* @param {string} uri Fully qualified path of resource.
* @return {void}
*/
uploadFile:function(id, callback, uri, postData){
// Each iframe has an id prefix of "yuiIO" followed
// by the unique transaction id.
var frameId = 'yuiIO' + id;
var io = document.getElementById(frameId);
// Initialize the HTML form properties in case they are
// not defined in the HTML form.
this._formNode.action = uri;
this._formNode.method = 'POST';
this._formNode.target = frameId;
if(this._formNode.encoding){
// IE does not respect property enctype for HTML forms.
// Instead use property encoding.
this._formNode.encoding = 'multipart/form-data';
}
else{
this._formNode.enctype = 'multipart/form-data';
}
if(postData){
var oElements = this.appendPostData(postData);
}
this._formNode.submit();
if(oElements && oElements.length > 0){
try
{
for(var i=0; i < oElements.length; i++){
this._formNode.removeChild(oElements[i]);
}
}
catch(e){}
}
// Reset HTML form status properties.
this.resetFormState();
// Create the upload callback handler that fires when the iframe
// receives the load event. Subsequently, the event handler is detached
// and the iframe removed from the document.
var uploadCallback = function()
{
var obj = {};
obj.tId = id;
obj.argument = callback.argument;
try
{
obj.responseText = io.contentWindow.document.body?io.contentWindow.document.body.innerHTML:null;
obj.responseXML = io.contentWindow.document.XMLDocument?io.contentWindow.document.XMLDocument:io.contentWindow.document;
}
catch(e){}
if(callback.upload){
if(!callback.scope){
callback.upload(obj);
}
else{
callback.upload.apply(callback.scope, [obj]);
}
}
if(YAHOO.util.Event){
YAHOO.util.Event.removeListener(io, "load", uploadCallback);
}
else if(window.detachEvent){
io.detachEvent('onload', uploadCallback);
}
else{
io.removeEventListener('load', uploadCallback, false);
}
setTimeout(function(){ document.body.removeChild(io); }, 100);
};
// Bind the onload handler to the iframe to detect the file upload response.
if(YAHOO.util.Event){
YAHOO.util.Event.addListener(io, "load", uploadCallback);
}
else if(window.attachEvent){
io.attachEvent('onload', uploadCallback);
}
else{
io.addEventListener('load', uploadCallback, false);
}
},
/**
* @description Method to terminate a transaction, if it has not reached readyState 4.
* @method abort
* @public
* @static
* @param {object} o The connection object returned by asyncRequest.
* @param {object} callback User-defined callback object.
* @param {string} isTimeout boolean to indicate if abort was a timeout.
* @return {boolean}
*/
abort:function(o, callback, isTimeout)
{
if(this.isCallInProgress(o)){
o.conn.abort();
window.clearInterval(this._poll[o.tId]);
delete this._poll[o.tId];
if(isTimeout){
delete this._timeOut[o.tId];
}
this.handleTransactionResponse(o, callback, true);
return true;
}
else{
return false;
}
},
/**
* Public method to check if the transaction is still being processed.
*
* @method isCallInProgress
* @public
* @static
* @param {object} o The connection object returned by asyncRequest
* @return {boolean}
*/
isCallInProgress:function(o)
{
// if the XHR object assigned to the transaction has not been dereferenced,
// then check its readyState status. Otherwise, return false.
if(o.conn){
return o.conn.readyState != 4 && o.conn.readyState != 0;
}
else{
//The XHR object has been destroyed.
return false;
}
},
/**
* @description Dereference the XHR instance and the connection object after the transaction is completed.
* @method releaseObject
* @private
* @static
* @param {object} o The connection object
* @return {void}
*/
releaseObject:function(o)
{
//dereference the XHR instance.
o.conn = null;
//dereference the connection object.
o = null;
}
};

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/*
Copyright (c) 2006, Yahoo! Inc. All rights reserved.
Code licensed under the BSD License:
http://developer.yahoo.net/yui/license.txt
version: 0.12.0
*/
/**
* The dom module provides helper methods for manipulating Dom elements.
* @module dom
*
*/
(function() {
var Y = YAHOO.util, // internal shorthand
getStyle, // for load time browser branching
setStyle, // ditto
id_counter = 0, // for use with generateId
propertyCache = {}; // for faster hyphen converts
// brower detection
var ua = navigator.userAgent.toLowerCase(),
isOpera = (ua.indexOf('opera') > -1),
isSafari = (ua.indexOf('safari') > -1),
isGecko = (!isOpera && !isSafari && ua.indexOf('gecko') > -1),
isIE = (!isOpera && ua.indexOf('msie') > -1);
// regex cache
var patterns = {
HYPHEN: /(-[a-z])/i
};
var toCamel = function(property) {
if ( !patterns.HYPHEN.test(property) ) {
return property; // no hyphens
}
if (propertyCache[property]) { // already converted
return propertyCache[property];
}
while( patterns.HYPHEN.exec(property) ) {
property = property.replace(RegExp.$1,
RegExp.$1.substr(1).toUpperCase());
}
propertyCache[property] = property;
return property;
//return property.replace(/-([a-z])/gi, function(m0, m1) {return m1.toUpperCase()}) // cant use function as 2nd arg yet due to safari bug
};
// branching at load instead of runtime
if (document.defaultView && document.defaultView.getComputedStyle) { // W3C DOM method
getStyle = function(el, property) {
var value = null;
var computed = document.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;
break;
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 ( typeof el.style.filter == 'string' ) { // 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;
default:
el.style[property] = val;
}
};
} else {
setStyle = function(el, property, val) {
el.style[property] = val;
};
}
/**
* 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) { return null; } // nothing to work with
if (typeof el != 'string' && !(el instanceof Array) ) { // assuming HTMLElement or HTMLCollection, so pass back as is
return el;
}
if (typeof el == 'string') { // ID
return document.getElementById(el);
}
else { // array of ID's and/or elements
var collection = [];
for (var i = 0, len = el.length; i < len; ++i) {
collection[collection.length] = Y.Dom.get(el[i]);
}
return collection;
}
return null; // safety, should never happen
},
/**
* 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') {
return false;
}
var parentNode = null;
var pos = [];
var box;
if (el.getBoundingClientRect) { // IE
box = el.getBoundingClientRect();
var doc = document;
if ( !this.inDocument(el) && parent.document != document) {// might be in a frame, need to get its scroll
doc = parent.document;
if ( !this.isAncestor(doc.documentElement, el) ) {
return false;
}
}
var scrollTop = Math.max(doc.documentElement.scrollTop, doc.body.scrollTop);
var scrollLeft = Math.max(doc.documentElement.scrollLeft, doc.body.scrollLeft);
return [box.left + scrollLeft, box.top + scrollTop];
}
else { // safari, opera, & gecko
pos = [el.offsetLeft, el.offsetTop];
parentNode = el.offsetParent;
if (parentNode != el) {
while (parentNode) {
pos[0] += parentNode.offsetLeft;
pos[1] += parentNode.offsetTop;
parentNode = parentNode.offsetParent;
}
}
if (isSafari && this.getStyle(el, 'position') == 'absolute' ) { // safari doubles in some cases
pos[0] -= document.body.offsetLeft;
pos[1] -= document.body.offsetTop;
}
}
if (el.parentNode) { parentNode = el.parentNode; }
else { parentNode = null; }
while (parentNode && parentNode.tagName.toUpperCase() != 'BODY' && parentNode.tagName.toUpperCase() != 'HTML')
{ // account for any scrolled ancestors
if (Y.Dom.getStyle(parentNode, 'display') != 'inline') { // work around opera inline scrollLeft/Top bug
pos[0] -= parentNode.scrollLeft;
pos[1] -= parentNode.scrollTop;
}
if (parentNode.parentNode) {
parentNode = parentNode.parentNode;
} else { parentNode = null; }
}
return pos;
};
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 {String | 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 {String | 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'; }
var newXY = this.getXY(el);
// if retry is true, try one more time if we miss
if (!noRetry && (newXY[0] != pos[0] || 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) {
var region = new 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.
* @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
* @return {Array} An array of elements that have the given class name
*/
getElementsByClassName: function(className, tag, root) {
var method = function(el) { return Y.Dom.hasClass(el, className); };
return Y.Dom.getElementsBy(method, tag, root);
},
/**
* 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 = new RegExp('(?:^|\\s+)' + className + '(?:\\s+|$)');
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
*/
addClass: function(el, className) {
var f = function(el) {
if (this.hasClass(el, className)) { return; } // already present
el['className'] = [el['className'], className].join(' ');
};
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
*/
removeClass: function(el, className) {
var re = new RegExp('(?:^|\\s+)' + className + '(?:\\s+|$)', 'g');
var f = function(el) {
if (!this.hasClass(el, className)) { return; } // not present
var c = el['className'];
el['className'] = c.replace(re, ' ');
if ( this.hasClass(el, className) ) { // in case of multiple adjacent
this.removeClass(el, className);
}
};
Y.Dom.batch(el, f, Y.Dom, true);
},
/**
* Replace a class with another class for a given element or collection of elements.
* If no oldClassName is present, the newClassName is simply added.
* @method replaceClass
* @param {String | HTMLElement | Array} el The element or collection to remove the class from
* @param {String} oldClassName the class name to be replaced
* @param {String} newClassName the class name that will be replacing the old class name
*/
replaceClass: function(el, oldClassName, newClassName) {
if (oldClassName === newClassName) { // avoid infinite loop
return false;
}
var re = new RegExp('(?:^|\\s+)' + oldClassName + '(?:\\s+|$)', 'g');
var f = function(el) {
if ( !this.hasClass(el, oldClassName) ) {
this.addClass(el, newClassName); // just add it if nothing to replace
return; // note return
}
el['className'] = el['className'].replace(re, ' ' + newClassName + ' ');
if ( this.hasClass(el, oldClassName) ) { // in case of multiple adjacent
this.replaceClass(el, oldClassName, newClassName);
}
};
Y.Dom.batch(el, f, Y.Dom, true);
},
/**
* Generates a unique ID
* @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';
el = el || {};
var f = function(el) {
if (el) {
el = Y.Dom.get(el);
} else {
el = {}; // just generating ID in this case
}
if (!el.id) {
el.id = prefix + id_counter++;
} // dont override existing
return el.id;
};
return Y.Dom.batch(el, f, Y.Dom, true);
},
/**
* 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);
if (!haystack || !needle) { return false; }
var f = function(needle) {
if (haystack.contains && !isSafari) { // safari "contains" is broken
return haystack.contains(needle);
}
else if ( haystack.compareDocumentPosition ) {
return !!(haystack.compareDocumentPosition(needle) & 16);
}
else { // loop up and test each parent
var parent = needle.parentNode;
while (parent) {
if (parent == haystack) {
return true;
}
else if (!parent.tagName || parent.tagName.toUpperCase() == 'HTML') {
return false;
}
parent = parent.parentNode;
}
return false;
}
};
return Y.Dom.batch(needle, f, Y.Dom, true);
},
/**
* 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) {
var f = function(el) {
return this.isAncestor(document.documentElement, el);
};
return Y.Dom.batch(el, f, Y.Dom, true);
},
/**
* 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.
* @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
*/
getElementsBy: function(method, tag, root) {
tag = tag || '*';
root = Y.Dom.get(root) || document;
var nodes = [];
var elements = root.getElementsByTagName(tag);
if ( !elements.length && (tag == '*' && root.all) ) {
elements = root.all; // IE < 6
}
for (var i = 0, len = elements.length; i < len; ++i) {
if ( method(elements[i]) ) { nodes[nodes.length] = elements[i]; }
}
return nodes;
},
/**
* Returns an array of elements that have had the supplied method applied.
* 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 {HTMLElement | Array} The element(s) with the method applied
*/
batch: function(el, method, o, override) {
var id = el;
el = Y.Dom.get(el);
var scope = (override) ? o : window;
if (!el || el.tagName || !el.length) { // is null or not a collection (tagName for SELECT and others that can be both an element and a collection)
if (!el) {
return false;
}
return method.call(scope, el, o);
}
var collection = [];
for (var i = 0, len = el.length; i < len; ++i) {
if (!el[i]) {
id = el[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;
}
};
})();
/**
* 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 (x instanceof Array) { // accept output from Dom.getXY
y = x[1];
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();

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/*
Copyright (c) 2006, Yahoo! Inc. All rights reserved.
Code licensed under the BSD License:
http://developer.yahoo.net/yui/license.txt
version: 0.12.0
*/
/**
* The YAHOO object is the single global object used by YUI Library. It
* contains utility function for setting up namespaces, inheritance, and
* logging. YAHOO.util, YAHOO.widget, and YAHOO.example are namespaces
* created automatically for and used by the library.
* @module yahoo
* @title YAHOO Global
*/
/**
* The YAHOO global namespace object
* @class YAHOO
* @static
*/
if (typeof YAHOO == "undefined") {
var YAHOO = {};
}
/**
* Returns the namespace specified and creates it if it doesn't exist
* <pre>
* YAHOO.namespace("property.package");
* YAHOO.namespace("YAHOO.property.package");
* </pre>
* Either of the above would create YAHOO.property, then
* YAHOO.property.package
*
* Be careful when naming packages. Reserved words may work in some browsers
* and not others. For instance, the following will fail in Safari:
* <pre>
* YAHOO.namespace("really.long.nested.namespace");
* </pre>
* This fails because "long" is a future reserved word in ECMAScript
*
* @method namespace
* @static
* @param {String*} arguments 1-n namespaces to create
* @return {Object} A reference to the last namespace object created
*/
YAHOO.namespace = function() {
var a=arguments, o=null, i, j, d;
for (i=0; i<a.length; ++i) {
d=a[i].split(".");
o=YAHOO;
// YAHOO is implied, so it is ignored if it is included
for (j=(d[0] == "YAHOO") ? 1 : 0; j<d.length; ++j) {
o[d[j]]=o[d[j]] || {};
o=o[d[j]];
}
}
return o;
};
/**
* Uses YAHOO.widget.Logger to output a log message, if the widget is available.
*
* @method log
* @static
* @param {String} msg The message to log.
* @param {String} cat The log category for the message. Default
* categories are "info", "warn", "error", time".
* Custom categories can be used as well. (opt)
* @param {String} src The source of the the message (opt)
* @return {Boolean} True if the log operation was successful.
*/
YAHOO.log = function(msg, cat, src) {
var l=YAHOO.widget.Logger;
if(l && l.log) {
return l.log(msg, cat, src);
} else {
return false;
}
};
/**
* Utility to set up the prototype, constructor and superclass properties to
* support an inheritance strategy that can chain constructors and methods.
*
* @method extend
* @static
* @param {Function} subc the object to modify
* @param {Function} superc the object to inherit
* @param {String[]} overrides additional properties/methods to add to the
* subclass prototype. These will override the
* matching items obtained from the superclass
* if present.
*/
YAHOO.extend = function(subc, superc, overrides) {
var F = function() {};
F.prototype=superc.prototype;
subc.prototype=new F();
subc.prototype.constructor=subc;
subc.superclass=superc.prototype;
if (superc.prototype.constructor == Object.prototype.constructor) {
superc.prototype.constructor=superc;
}
if (overrides) {
for (var i in overrides) {
subc.prototype[i]=overrides[i];
}
}
};
/**
* Applies all prototype properties in the supplier to the receiver if the
* receiver does not have these properties yet. Optionally, one or more
* methods/properties can be specified (as additional parameters). This
* option will overwrite the property if receiver has it already.
*
* @method augment
* @static
* @param {Function} r the object to receive the augmentation
* @param {Function} s the object that supplies the properties to augment
* @param {String*} arguments zero or more properties methods to augment the
* receiver with. If none specified, everything
* in the supplier will be used unless it would
* overwrite an existing property in the receiver
*/
YAHOO.augment = function(r, s) {
var rp=r.prototype, sp=s.prototype, a=arguments, i, p;
if (a[2]) {
for (i=2; i<a.length; ++i) {
rp[a[i]] = sp[a[i]];
}
} else {
for (p in sp) {
if (!rp[p]) {
rp[p] = sp[p];
}
}
}
};
YAHOO.namespace("util", "widget", "example");