mirror of
https://github.com/jquery/jquery.git
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752 lines
22 KiB
JavaScript
752 lines
22 KiB
JavaScript
jQuery.fn.extend({
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/**
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* Load HTML from a remote file and inject it into the DOM, only if it's
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* been modified by the server.
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*
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* @example $("#feeds").loadIfModified("feeds.html")
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* @before <div id="feeds"></div>
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* @result <div id="feeds"><b>45</b> feeds found.</div>
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*
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* @name loadIfModified
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* @type jQuery
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* @param String url The URL of the HTML file to load.
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* @param Hash params A set of key/value pairs that will be sent to the server.
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* @param Function callback A function to be executed whenever the data is loaded.
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* @cat AJAX
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*/
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loadIfModified: function( url, params, callback ) {
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this.load( url, params, callback, 1 );
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},
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/**
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* Load HTML from a remote file and inject it into the DOM.
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*
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* @example $("#feeds").load("feeds.html")
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* @before <div id="feeds"></div>
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* @result <div id="feeds"><b>45</b> feeds found.</div>
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*
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* @example $("#feeds").load("feeds.html",
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* {test: true},
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* function() { alert("load is done"); }
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* );
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* @desc Same as above, but with an additional parameter
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* and a callback that is executed when the data was loaded.
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*
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* @name load
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* @type jQuery
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* @param String url The URL of the HTML file to load.
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* @param Object params A set of key/value pairs that will be sent as data to the server.
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* @param Function callback A function to be executed whenever the data is loaded (parameters: responseText, status and reponse itself).
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* @cat AJAX
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*/
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load: function( url, params, callback, ifModified ) {
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if ( url.constructor == Function )
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return this.bind("load", url);
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callback = callback || function(){};
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// Default to a GET request
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var type = "GET";
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// If the second parameter was provided
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if ( params ) {
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// If it's a function
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if ( params.constructor == Function ) {
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// We assume that it's the callback
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callback = params;
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params = null;
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// Otherwise, build a param string
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} else {
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params = jQuery.param( params );
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type = "POST";
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}
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}
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var self = this;
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// Request the remote document
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jQuery.ajax({
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url: url,
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type: type,
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data: params,
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ifModified: ifModified,
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complete: function(res, status){
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if ( status == "success" || !ifModified && status == "notmodified" ) {
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// Inject the HTML into all the matched elements
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self.html(res.responseText)
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// Execute all the scripts inside of the newly-injected HTML
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.evalScripts()
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// Execute callback
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.each( callback, [res.responseText, status, res] );
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} else
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callback.apply( self, [res.responseText, status, res] );
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}
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});
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return this;
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},
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/**
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* Serializes a set of input elements into a string of data.
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* This will serialize all given elements. If you need
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* serialization similar to the form submit of a browser,
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* you should use the form plugin. This is also true for
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* selects with multiple attribute set, only a single option
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* is serialized.
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*
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* @example $("input[@type=text]").serialize();
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* @before <input type='text' name='name' value='John'/>
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* <input type='text' name='location' value='Boston'/>
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* @after name=John&location=Boston
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* @desc Serialize a selection of input elements to a string
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*
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* @name serialize
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* @type String
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* @cat AJAX
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*/
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serialize: function() {
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return jQuery.param( this );
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},
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/**
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* Evaluate all script tags inside this jQuery. If they have a src attribute,
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* the script is loaded, otherwise it's content is evaluated.
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*
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* @name evalScripts
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* @type jQuery
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* @private
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* @cat AJAX
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*/
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evalScripts: function() {
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return this.find('script').each(function(){
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if ( this.src )
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// for some weird reason, it doesn't work if the callback is ommited
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jQuery.getScript( this.src );
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else {
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jQuery.globalEval( this.text || this.textContent || this.innerHTML || "" );
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}
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}).end();
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}
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});
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// If IE is used, create a wrapper for the XMLHttpRequest object
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if ( jQuery.browser.msie && typeof XMLHttpRequest == "undefined" )
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XMLHttpRequest = function(){
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return new ActiveXObject("Microsoft.XMLHTTP");
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};
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// Attach a bunch of functions for handling common AJAX events
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/**
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* Attach a function to be executed whenever an AJAX request begins.
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*
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* @example $("#loading").ajaxStart(function(){
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* $(this).show();
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* });
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* @desc Show a loading message whenever an AJAX request starts.
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*
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* @name ajaxStart
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* @type jQuery
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* @param Function callback The function to execute.
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* @cat AJAX
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*/
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/**
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* Attach a function to be executed whenever all AJAX requests have ended.
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*
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* @example $("#loading").ajaxStop(function(){
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* $(this).hide();
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* });
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* @desc Hide a loading message after all the AJAX requests have stopped.
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*
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* @name ajaxStop
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* @type jQuery
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* @param Function callback The function to execute.
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* @cat AJAX
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*/
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/**
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* Attach a function to be executed whenever an AJAX request completes.
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*
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* @example $("#msg").ajaxComplete(function(){
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* $(this).append("<li>Request Complete.</li>");
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* });
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* @desc Show a message when an AJAX request completes.
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*
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* @name ajaxComplete
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* @type jQuery
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* @param Function callback The function to execute.
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* @cat AJAX
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*/
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/**
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* Attach a function to be executed whenever an AJAX request completes
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* successfully.
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*
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* @example $("#msg").ajaxSuccess(function(){
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* $(this).append("<li>Successful Request!</li>");
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* });
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* @desc Show a message when an AJAX request completes successfully.
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*
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* @name ajaxSuccess
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* @type jQuery
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* @param Function callback The function to execute.
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* @cat AJAX
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*/
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/**
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* Attach a function to be executed whenever an AJAX request fails.
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*
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* @example $("#msg").ajaxError(function(){
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* $(this).append("<li>Error requesting page.</li>");
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* });
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* @desc Show a message when an AJAX request fails.
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*
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* @name ajaxError
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* @type jQuery
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* @param Function callback The function to execute.
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* @cat AJAX
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*/
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new function(){
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var e = "ajaxStart,ajaxStop,ajaxComplete,ajaxError,ajaxSuccess".split(",");
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for ( var i = 0; i < e.length; i++ ) new function(){
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var o = e[i];
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jQuery.fn[o] = function(f){
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return this.bind(o, f);
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};
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};
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};
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jQuery.extend({
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/**
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* Load a remote page using an HTTP GET request. All of the arguments to
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* the method (except URL) are optional.
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*
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* @example $.get("test.cgi")
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*
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* @example $.get("test.cgi", { name: "John", time: "2pm" } )
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*
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* @example $.get("test.cgi", function(data){
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* alert("Data Loaded: " + data);
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* })
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*
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* @example $.get("test.cgi",
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* { name: "John", time: "2pm" },
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* function(data){
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* alert("Data Loaded: " + data);
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* }
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* )
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*
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* @name $.get
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* @type undefined
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* @param String url The URL of the page to load.
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* @param Hash params A set of key/value pairs that will be sent to the server.
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* @param Function callback A function to be executed whenever the data is loaded.
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* @cat AJAX
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*/
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get: function( url, data, callback, type, ifModified ) {
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// shift arguments if data argument was ommited
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if ( data && data.constructor == Function ) {
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callback = data;
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data = null;
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}
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// Delegate
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jQuery.ajax({
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url: url,
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data: data,
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success: callback,
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dataType: type,
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ifModified: ifModified
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});
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},
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/**
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* Load a remote page using an HTTP GET request, only if it hasn't
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* been modified since it was last retrieved. All of the arguments to
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* the method (except URL) are optional.
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*
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* @example $.getIfModified("test.html")
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*
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* @example $.getIfModified("test.html", { name: "John", time: "2pm" } )
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*
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* @example $.getIfModified("test.cgi", function(data){
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* alert("Data Loaded: " + data);
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* })
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*
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* @example $.getifModified("test.cgi",
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* { name: "John", time: "2pm" },
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* function(data){
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* alert("Data Loaded: " + data);
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* }
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* )
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*
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* @name $.getIfModified
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* @type undefined
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* @param String url The URL of the page to load.
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* @param Hash params A set of key/value pairs that will be sent to the server.
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* @param Function callback A function to be executed whenever the data is loaded.
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* @cat AJAX
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*/
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getIfModified: function( url, data, callback, type ) {
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jQuery.get(url, data, callback, type, 1);
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},
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/**
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* Loads, and executes, a remote JavaScript file using an HTTP GET request.
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* All of the arguments to the method (except URL) are optional.
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*
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* Warning: Safari <= 2.0.x is unable to evalulate scripts in a global
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* context sychronously. If you load functions via getScript, make sure
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* to call them after a delay.
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*
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* @example $.getScript("test.js")
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*
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* @example $.getScript("test.js", function(){
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* alert("Script loaded and executed.");
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* })
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*
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* @name $.getScript
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* @type undefined
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* @param String url The URL of the page to load.
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* @param Function callback A function to be executed whenever the data is loaded.
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* @cat AJAX
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*/
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getScript: function( url, callback ) {
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if(callback)
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jQuery.get(url, null, callback, "script");
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else {
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jQuery.get(url, null, null, "script");
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}
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},
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/**
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* Load a remote JSON object using an HTTP GET request.
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* All of the arguments to the method (except URL) are optional.
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*
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* @example $.getJSON("test.js", function(json){
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* alert("JSON Data: " + json.users[3].name);
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* })
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*
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* @example $.getJSON("test.js",
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* { name: "John", time: "2pm" },
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* function(json){
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* alert("JSON Data: " + json.users[3].name);
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* }
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* )
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*
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* @name $.getJSON
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* @type undefined
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* @param String url The URL of the page to load.
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* @param Hash params A set of key/value pairs that will be sent to the server.
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* @param Function callback A function to be executed whenever the data is loaded.
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* @cat AJAX
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*/
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getJSON: function( url, data, callback ) {
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jQuery.get(url, data, callback, "json");
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},
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/**
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* Load a remote page using an HTTP POST request. All of the arguments to
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* the method (except URL) are optional.
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*
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* @example $.post("test.cgi")
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*
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* @example $.post("test.cgi", { name: "John", time: "2pm" } )
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*
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* @example $.post("test.cgi", function(data){
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* alert("Data Loaded: " + data);
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* })
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*
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* @example $.post("test.cgi",
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* { name: "John", time: "2pm" },
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* function(data){
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* alert("Data Loaded: " + data);
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* }
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* )
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*
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* @name $.post
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* @type undefined
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* @param String url The URL of the page to load.
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* @param Hash params A set of key/value pairs that will be sent to the server.
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* @param Function callback A function to be executed whenever the data is loaded.
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* @cat AJAX
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*/
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post: function( url, data, callback, type ) {
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// Delegate
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jQuery.ajax({
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type: "POST",
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url: url,
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data: data,
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success: callback,
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dataType: type
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});
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},
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// timeout (ms)
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timeout: 0,
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/**
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* Set the timeout of all AJAX requests to a specific amount of time.
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* This will make all future AJAX requests timeout after a specified amount
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* of time (the default is no timeout).
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*
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* @example $.ajaxTimeout( 5000 );
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* @desc Make all AJAX requests timeout after 5 seconds.
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*
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* @name $.ajaxTimeout
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* @type undefined
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* @param Number time How long before an AJAX request times out.
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* @cat AJAX
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*/
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ajaxTimeout: function(timeout) {
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jQuery.timeout = timeout;
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},
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// Last-Modified header cache for next request
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lastModified: {},
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/**
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* Load a remote page using an HTTP request. This function is the primary
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* means of making AJAX requests using jQuery.
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*
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* $.ajax() returns the XMLHttpRequest that it creates. In most cases you won't
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* need that object to manipulate directly, but it is available if you need to
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* abort the request manually.
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*
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* Please note: Make sure the server sends the right mimetype (eg. xml as
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* "text/xml"). Sending the wrong mimetype will get you into serious
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* trouble that jQuery can't solve.
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*
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* Supported datatypes (see dataType option) are:
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*
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* "xml": Returns a XML document that can be processed via jQuery.
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*
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* "html": Returns HTML as plain text, included script tags are evaluated.
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*
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* "script": Evaluates the response as Javascript and returns it as plain text.
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*
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* "json": Evaluates the response as JSON and returns a Javascript Object
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*
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* $.ajax() takes one property, an object of key/value pairs, that are
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* used to initalize the request. These are all the key/values that can
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* be passed in to 'prop':
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*
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* (String) url - The URL of the page to request.
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*
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* (String) type - The type of request to make (e.g. "POST" or "GET"), default is "GET".
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*
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* (String) dataType - The type of data that you're expecting back from
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* the server. No default: If the server sends xml, the responseXML, otherwise
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* the responseText is is passed to the success callback.
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*
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* (Boolean) ifModified - Allow the request to be successful only if the
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* response has changed since the last request, default is false, ignoring
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* the Last-Modified header
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*
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* (Number) timeout - Local timeout to override global timeout, eg. to give a
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* single request a longer timeout while all others timeout after 1 seconds,
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* see $.ajaxTimeout()
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*
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* (Boolean) global - Wheather to trigger global AJAX event handlers for
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* this request, default is true. Set to false to prevent that global handlers
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* like ajaxStart or ajaxStop are triggered.
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*
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* (Function) error - A function to be called if the request fails. The
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* function gets passed two arguments: The XMLHttpRequest object and a
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* string describing the type of error that occurred.
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*
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* (Function) success - A function to be called if the request succeeds. The
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* function gets passed one argument: The data returned from the server,
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* formatted according to the 'dataType' parameter.
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*
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* (Function) complete - A function to be called when the request finishes. The
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* function gets passed two arguments: The XMLHttpRequest object and a
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* string describing the type the success of the request.
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*
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* (Object|String) data - Data to be sent to the server. Converted to a query
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* string, if not already a string. Is appended to the url for GET-requests.
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* Override processData option to prevent processing.
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*
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* (String) contentType - When sending data to the server, use this content-type,
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* default is "application/x-www-form-urlencoded", which is fine for most cases.
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*
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* (Boolean) processData - By default, data passed in as an object other as string
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* will be processed and transformed into a query string, fitting to the default
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* content-type "application/x-www-form-urlencoded". If you want to send DOMDocuments,
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* set this option to false.
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*
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* (Boolean) async - By default, all requests are send asynchronous (set to true).
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* If you need synchronous requests, set this option to false.
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*
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* (Function) beforeSend - A pre-callback to set custom headers etc., the
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* XMLHttpRequest is passed as the only argument.
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*
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* @example $.ajax({
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* type: "GET",
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* url: "test.js",
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* dataType: "script"
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* })
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* @desc Load and execute a JavaScript file.
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*
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* @example $.ajax({
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* type: "POST",
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* url: "some.php",
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* data: "name=John&location=Boston",
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* success: function(msg){
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* alert( "Data Saved: " + msg );
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* }
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* });
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* @desc Save some data to the server and notify the user once its complete.
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*
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* @name $.ajax
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* @type XMLHttpRequest
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* @param Hash prop A set of properties to initialize the request with.
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* @cat AJAX
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*/
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ajax: function( s ) {
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// TODO introduce global settings, allowing the client to modify them for all requests, not only timeout
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s = jQuery.extend({
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global: true,
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ifModified: false,
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type: "GET",
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timeout: jQuery.timeout,
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complete: null,
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success: null,
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error: null,
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dataType: null,
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url: null,
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data: null,
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contentType: "application/x-www-form-urlencoded",
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processData: true,
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async: true,
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beforeSend: null
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}, s);
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// if data available
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if ( s.data ) {
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// convert data if not already a string
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if (s.processData && typeof s.data != 'string')
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s.data = jQuery.param(s.data);
|
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// append data to url for get requests
|
|
if( s.type.toLowerCase() == "get" )
|
|
// "?" + data or "&" + data (in case there are already params)
|
|
s.url += ((s.url.indexOf("?") > -1) ? "&" : "?") + s.data;
|
|
}
|
|
|
|
// Watch for a new set of requests
|
|
if ( s.global && ! jQuery.active++ )
|
|
jQuery.event.trigger( "ajaxStart" );
|
|
|
|
var requestDone = false;
|
|
|
|
// Create the request object
|
|
var xml = new XMLHttpRequest();
|
|
|
|
// Open the socket
|
|
xml.open(s.type, s.url, s.async);
|
|
|
|
// Set the correct header, if data is being sent
|
|
if ( s.data )
|
|
xml.setRequestHeader("Content-Type", s.contentType);
|
|
|
|
// Set the If-Modified-Since header, if ifModified mode.
|
|
if ( s.ifModified )
|
|
xml.setRequestHeader("If-Modified-Since",
|
|
jQuery.lastModified[s.url] || "Thu, 01 Jan 1970 00:00:00 GMT" );
|
|
|
|
// Set header so the called script knows that it's an XMLHttpRequest
|
|
xml.setRequestHeader("X-Requested-With", "XMLHttpRequest");
|
|
|
|
// Make sure the browser sends the right content length
|
|
if ( xml.overrideMimeType )
|
|
xml.setRequestHeader("Connection", "close");
|
|
|
|
// Allow custom headers/mimetypes
|
|
if( s.beforeSend )
|
|
s.beforeSend(xml);
|
|
|
|
// Wait for a response to come back
|
|
var onreadystatechange = function(isTimeout){
|
|
// The transfer is complete and the data is available, or the request timed out
|
|
if ( xml && (xml.readyState == 4 || isTimeout == "timeout") ) {
|
|
requestDone = true;
|
|
|
|
var status = jQuery.httpSuccess( xml ) && isTimeout != "timeout" ?
|
|
s.ifModified && jQuery.httpNotModified( xml, s.url ) ? "notmodified" : "success" : "error";
|
|
|
|
// Make sure that the request was successful or notmodified
|
|
if ( status != "error" ) {
|
|
// Cache Last-Modified header, if ifModified mode.
|
|
var modRes;
|
|
try {
|
|
modRes = xml.getResponseHeader("Last-Modified");
|
|
} catch(e) {} // swallow exception thrown by FF if header is not available
|
|
|
|
if ( s.ifModified && modRes )
|
|
jQuery.lastModified[s.url] = modRes;
|
|
|
|
// process the data (runs the xml through httpData regardless of callback)
|
|
var data = jQuery.httpData( xml, s.dataType );
|
|
|
|
// If a local callback was specified, fire it and pass it the data
|
|
if ( s.success )
|
|
s.success( data, status );
|
|
|
|
// Fire the global callback
|
|
if( s.global )
|
|
jQuery.event.trigger( "ajaxSuccess" );
|
|
|
|
// Otherwise, the request was not successful
|
|
} else {
|
|
// If a local callback was specified, fire it
|
|
if ( s.error ) s.error( xml, status );
|
|
|
|
// Fire the global callback
|
|
if( s.global )
|
|
jQuery.event.trigger( "ajaxError" );
|
|
}
|
|
|
|
// The request was completed
|
|
if( s.global )
|
|
jQuery.event.trigger( "ajaxComplete" );
|
|
|
|
// Handle the global AJAX counter
|
|
if ( s.global && ! --jQuery.active )
|
|
jQuery.event.trigger( "ajaxStop" );
|
|
|
|
// Process result
|
|
if ( s.complete ) s.complete(xml, status);
|
|
|
|
// Stop memory leaks
|
|
xml.onreadystatechange = function(){};
|
|
xml = null;
|
|
|
|
}
|
|
};
|
|
xml.onreadystatechange = onreadystatechange;
|
|
|
|
// Timeout checker
|
|
if(s.timeout > 0)
|
|
setTimeout(function(){
|
|
// Check to see if the request is still happening
|
|
if (xml) {
|
|
// Cancel the request
|
|
xml.abort();
|
|
|
|
if ( !requestDone ) onreadystatechange( "timeout" );
|
|
|
|
// Clear from memory
|
|
xml = null;
|
|
}
|
|
}, s.timeout);
|
|
|
|
// Send the data
|
|
xml.send(s.data);
|
|
|
|
// return XMLHttpRequest to allow aborting the request etc.
|
|
return xml;
|
|
},
|
|
|
|
// Counter for holding the number of active queries
|
|
active: 0,
|
|
|
|
// Determines if an XMLHttpRequest was successful or not
|
|
httpSuccess: function(r) {
|
|
try {
|
|
return !r.status && location.protocol == "file:" ||
|
|
( r.status >= 200 && r.status < 300 ) || r.status == 304 ||
|
|
jQuery.browser.safari && r.status == undefined;
|
|
} catch(e){}
|
|
|
|
return false;
|
|
},
|
|
|
|
// Determines if an XMLHttpRequest returns NotModified
|
|
httpNotModified: function(xml, url) {
|
|
try {
|
|
var xmlRes = xml.getResponseHeader("Last-Modified");
|
|
|
|
// Firefox always returns 200. check Last-Modified date
|
|
return xml.status == 304 || xmlRes == jQuery.lastModified[url] ||
|
|
jQuery.browser.safari && xml.status == undefined;
|
|
} catch(e){}
|
|
|
|
return false;
|
|
},
|
|
|
|
/* Get the data out of an XMLHttpRequest.
|
|
* Return parsed XML if content-type header is "xml" and type is "xml" or omitted,
|
|
* otherwise return plain text.
|
|
* (String) data - The type of data that you're expecting back,
|
|
* (e.g. "xml", "html", "script")
|
|
*/
|
|
httpData: function(r,type) {
|
|
var ct = r.getResponseHeader("content-type");
|
|
var data = !type && ct && ct.indexOf("xml") >= 0;
|
|
data = type == "xml" || data ? r.responseXML : r.responseText;
|
|
|
|
// If the type is "script", eval it in global context
|
|
if ( type == "script" ) {
|
|
jQuery.globalEval( data );
|
|
}
|
|
|
|
// Get the JavaScript object, if JSON is used.
|
|
if ( type == "json" ) eval( "data = " + data );
|
|
|
|
// evaluate scripts within html
|
|
if ( type == "html" ) jQuery("<div>").html(data).evalScripts();
|
|
|
|
return data;
|
|
},
|
|
|
|
// Serialize an array of form elements or a set of
|
|
// key/values into a query string
|
|
param: function(a) {
|
|
var s = [];
|
|
|
|
// If an array was passed in, assume that it is an array
|
|
// of form elements
|
|
if ( a.constructor == Array || a.jquery ) {
|
|
// Serialize the form elements
|
|
for ( var i = 0; i < a.length; i++ )
|
|
s.push( a[i].name + "=" + encodeURIComponent( a[i].value ) );
|
|
|
|
// Otherwise, assume that it's an object of key/value pairs
|
|
} else {
|
|
// Serialize the key/values
|
|
for ( var j in a ) {
|
|
// If the value is an array then the key names need to be repeated
|
|
if( a[j].constructor == Array ) {
|
|
for (var k = 0; k < a[j].length; k++) {
|
|
s.push( j + "=" + encodeURIComponent( a[j][k] ) );
|
|
}
|
|
} else {
|
|
s.push( j + "=" + encodeURIComponent( a[j] ) );
|
|
}
|
|
}
|
|
}
|
|
|
|
// Return the resulting serialization
|
|
return s.join("&");
|
|
},
|
|
|
|
// evalulates a script in global context
|
|
// not reliable for safari
|
|
globalEval: function(data) {
|
|
if (window.execScript)
|
|
window.execScript( data );
|
|
else if(jQuery.browser.safari)
|
|
// safari doesn't provide a synchronous global eval
|
|
window.setTimeout( data, 0 );
|
|
else
|
|
eval.call( window, data );
|
|
}
|
|
|
|
});
|