Minor bug fixes.
[jquery.git] / ajax / ajax.js
index f7c858a..1960150 100644 (file)
 // Docs Here:
 // http://jquery.com/docs/ajax/
 
-if ( typeof XMLHttpRequest == 'undefined' && typeof window.ActiveXObject == 'function') {
-       XMLHttpRequest = function() {
-               return new ActiveXObject((navigator.userAgent.toLowerCase().indexOf('msie 5') >= 0) ?
-                       "Microsoft.XMLHTTP" : "Msxml2.XMLHTTP");
-       };
-}
-
-// Counter for holding the active query's
-$.xmlActive=0;
-
-$.xml = function( type, url, data, ret ) {
-       var xml = new XMLHttpRequest();
-
-       if ( xml ) {
-               // Open the socket
-               xml.open(type || "GET", url, true);
-               if ( data )
-                       xml.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
-
-               // Set header so calling script knows that it's an XMLHttpRequest
-               xml.setRequestHeader('X-Requested-With', 'XMLHttpRequest');
-
-               /* Force "Connection: close" for Mozilla browsers to work around
-                * a bug where XMLHttpReqeuest sends an incorrect Content-length
-                * header. See Mozilla Bugzilla #246651.
-                */
-               if ( xml.overrideMimeType )
-                       xml.setRequestHeader('Connection', 'close');
-
-               xml.onreadystatechange = function() {
-                       // Socket is openend
-                       if ( xml.readyState == 1 ) {
-                               // Increase counter
-                               $.xmlActive++;
-
-                               // Show loader if needed
-                               if ( ($.xmlActive >= 1) && ($.xmlCreate) )
-                                       $.xmlCreate();
-                       }
-
-                       // Socket is closed and data is available
-                       if ( xml.readyState == 4 ) {
-                               // Decrease counter
-                               $.xmlActive--;
-
-                               // Hide loader if needed
-                               if ( ($.xmlActive <= 0) && ($.xmlDestroy) ) {
-                                       $.xmlDestroy();
-                                       $.xmlActive = 0
-                               }
-
-                               // Process result
-                               if ( ret )
-                                       ret(xml);
-                       }
-               };
-
-               xml.send(data)
-       }
-};
-
-$.httpData = function(r,type) {
-       return r.getResponseHeader("content-type").indexOf("xml") > 0 || type == "xml" ?
-               r.responseXML : r.responseText;
-};
-
-$.get = function( url, ret, type ) {
-       $.xml( "GET", url, null, function(r) {
-               if ( ret ) { ret( $.httpData(r,type) ); }
-       });
-};
-
-$.getXML = function( url, ret ) {
-       $.get( url, ret, "xml" );
-};
-
-$.post = function( url, data, ret, type ) {
-       $.xml( "POST", url, $.param(data), function(r) {
-               if ( ret ) { ret( $.httpData(r,type) ); }
-       });
-};
-
-$.postXML = function( url, data, ret ) {
-       $.post( url, data, ret, "xml" );
-};
-
-$.param = function(a) {
-       var s = [];
-       if (a && typeof a == 'object' && a.constructor == Array) {
-               for ( var i=0; i < a.length; i++ ) {
-                       s[s.length] = a[i].name + "=" + encodeURIComponent( a[i].value );
-               }
-       } else {
-               for ( var j in a ) {
-                       s[s.length] = j + "=" + encodeURIComponent( a[j] );
-               }
-       }
-       return s.join("&");
-};
-
-$.fn.load = function(a,o,f) {
-       // Arrrrghhhhhhhh!!
+/**
+ * Load HTML from a remote file and inject it into the DOM
+ */
+jQuery.fn.load = function( url, params, callback ) {
        // I overwrote the event plugin's .load
        // this won't happen again, I hope -John
-       if ( a && a.constructor == Function ) {
-               return this.bind("load", a);
-       }
-
-       var t = "GET";
-       if ( o && o.constructor == Function ) {
-               f = o;
-               o = null;
-       }
-       if (o !== null) {
-               o = $.param(o);
-               t = "POST";
+       if ( url && url.constructor == Function )
+               return this.bind("load", url);
+
+       // Default to a GET request
+       var type = "GET";
+
+       // If the second parameter was provided
+       if ( params ) {
+               // If it's a function
+               if ( params.constructor == Function ) {
+                       // We assume that it's the callback
+                       callback = params;
+                       params = null;
+                       
+               // Otherwise, build a param string
+               } else {
+                       params = jQuery.param( params );
+                       type = "POST";
+               }
        }
+       
        var self = this;
-       $.xml(t,a,o,function(h){
-               h = h.responseText;
-               self.html(h).find("script").each(function(){
-                       try {
-                               $.eval( this.text || this.textContent || this.innerHTML );
-                       } catch(e){}
+       
+       // Request the remote document
+       jQuery.ajax( type, url, params,function(res){
+                       
+               // Inject the HTML into all the matched elements
+               self.html(res.responseText).each(function(){
+                       // If a callback function was provided
+                       if ( callback && callback.constructor == Function )
+                               // Execute it within the context of the element
+                               callback.apply( self, [res.responseText] );
                });
-               if(f){f(h);}
+               
+               // Execute all the scripts inside of the newly-injected HTML
+               $("script", self).each(function(){
+                       eval( this.text || this.textContent || this.innerHTML || "");
+               });
+
        });
+       
        return this;
 };
 
-/**
- * name:       $.fn.formValues
- * example:    $('#frmLogin').formValues('sButton')
- * docs:       Gets form values and creates a key=>value array of the found values.
- *             Optionally adds the button which is clicked if you provide it.
- *             Only does this for ENABLED elements in the order of the form.
- */
-$.fn.formValues = function(sButton) {
-       var a = [];
-       var elp = {INPUT:true, TEXTAREA:true, OPTION:true};
-
-       // Loop the shite
-       $('*', this).each(function() {
-               // Skip disabled elements
-               if (this.disabled)
-                       return;
-
-               // Skip elements not of the types in elp
-               if (!elp[this.tagName.toUpperCase()])
-                       return;
-
-               // Skip submit buttons and image elements
-               if ((this.type == 'submit') || (this.type == 'image'))
-                       return;
-
-
-               // Skip non-selected options
-               var sP = this.parentNode.nodeName.toUpperCase();
-               if (((sP == 'SELECT') || (sP == 'OPTGROUP')) && (!this.selected))
-                       return;
-
-               // Skip non-checked nodes
-               if (((this.type == 'radio') || (this.type == 'checkbox')) && (!this.checked))
-                       return;
-
-               // If we come here, everything is fine
-               var sN = this.name || this.id || this.parentNode.name || this.parentNode.id;
-               var sV = this.value;
-               if ((!sN) && (sP == 'OPTGROUP'))
-                       sN = this.parentNode.parentNode.name || this.parentNode.parentNode.id;
-
-               // Add the data
-               a.push({ name: sN, value: sV });
-       });
+// If IE is used, create a wrapper for the XMLHttpRequest object
+if ( jQuery.browser.msie )
+       XMLHttpRequest = function(){
+               return new ActiveXObject(
+                       navigator.userAgent.indexOf("MSIE 5") >= 0 ?
+                       "Microsoft.XMLHTTP" : "Msxml2.XMLHTTP"
+               );
+       };
 
-       // Add submit button if needed
-       if (sButton && (sButton !== null)) {
-               var el = $(sButton).get(0);
-               a.push({
-                       name: el.name || el.id || el.parentNode.name || el.parentNode.id,
-                       value: el.value
-               });
+// Attach a bunch of functions for handling common AJAX events
+new function(){
+       var e = "ajaxStart,ajaxStop,ajaxComplete,ajaxError,ajaxSuccess".split(',');
+       
+       for ( var i = 0; i < e.length; i++ ) new function(){
+               var o = e[i];
+               jQuery.fn[o] = function(f){
+                       return this.bind(o, f);
+               };
        }
-
-       // Done
-       return a;
 };
 
-/**
- * name:       $.fn.update
- * example:    $('someJQueryObject').update('sURL', 'sAction', 'aValues', 'fCallback');
- * docs:       Calls sURL with sAction and sends the aValues
- *                 Puts the results from that call in the jQuery object and calls fCallback
- */
-$.fn.update = function(sURL, sMethod, aValues, fCallback) {
-       var el = this;
-
-       // Process
-       $.xml(
-               sMethod || "GET",
-               sURL || "",
-               $.param(aValues),
-               function(sResult) {
-                       sResult = $.httpData(sResult);
+jQuery.extend({
 
-                       // Update the element with the new HTML
-                       el.html(sResult);
-
-                       // Evaluate the scripts AFTER this (so you can allready modify the new HTML!)
-                       el.html(sResult).find("script").each(function(){
-                               try { $.eval( this.text || this.textContent || this.innerHTML ); } catch(e) { }
-                       });
-
-                       // And call the callback handler :)
-                       if (fCallback && (fCallback.constructor == Function))
-                               fCallback();
+       /**
+        * Load a remote page using a GET request
+        */
+       get: function( url, data, callback, type ) {
+               if ( data.constructor == Function ) {
+                       callback = data;
+                       data = null;
                }
-       );
-};
-
-/**
- * name:                       $.fn.serialize
- * example:    $('someJQueryObject').serialize('sButton', 'fCallback');
- * docs:       Calls the form's action with the correct method and the serialized values.
- *             Optionally adds the button which is clicked if you provide it.
- *             When there are results, the fCallback function is called.
- */
-$.fn.serialize = function(sButton, fCallback) {
-       var el = this.get(0);
-
-       // Process
-       $.xml(
-               el.method || "GET",
-               el.action || "",
-               $.param(this.formValues(sButton)),
-               function(sResult) {
-                       if (fCallback && (fCallback.constructor == Function))
-                               fCallback($.httpData(sResult));
+               
+               if ( data )
+                       url += "?" + jQuery.param(data);
+               
+               // Build and start the HTTP Request
+               jQuery.ajax( "GET", url, null, function(r) {
+                       if ( callback ) callback( jQuery.httpData(r,type) );
+               });
+       },
+       
+       /**
+        * Load a remote page using a POST request.
+        */
+       post: function( url, data, callback, type ) {
+               // Build and start the HTTP Request
+               jQuery.ajax( "POST", url, jQuery.param(data), function(r) {
+                       if ( callback ) callback( jQuery.httpData(r,type) );
+               });
+       },
+       
+       /**
+        * A common wrapper for making XMLHttpRequests
+        */
+       ajax: function( type, url, data, ret ) {
+               // If only a single argument was passed in,
+               // assume that it is a object of key/value pairs
+               if ( !url ) {
+                       ret = type.complete;
+                       var success = type.success;
+                       var error = type.error;
+                       data = type.data;
+                       url = type.url;
+                       type = type.type;
                }
-       );
-};
+               
+               // Watch for a new set of requests
+               if ( ! jQuery.active++ )
+                       jQuery.event.trigger( "ajaxStart" );
+       
+               // Create the request object
+               var xml = new XMLHttpRequest();
+       
+               // Open the socket
+               xml.open(type || "GET", url, true);
+               
+               // Set the correct header, if data is being sent
+               if ( data )
+                       xml.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
+       
+               // Set header so calling 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");
+       
+               // Wait for a response to come back
+               xml.onreadystatechange = function(){
+                       // The transfer is complete and the data is available
+                       if ( xml.readyState == 4 ) {
+                               // Make sure that the request was successful
+                               if ( jQuery.httpSuccess( xml ) ) {
+                               
+                                       // If a local callback was specified, fire it
+                                       if ( success ) success( xml );
+                                       
+                                       // Fire the global callback
+                                       jQuery.event.trigger( "ajaxSuccess" );
+                               
+                               // Otherwise, the request was not successful
+                               } else {
+                                       // If a local callback was specified, fire it
+                                       if ( error ) error( xml );
+                                       
+                                       // Fire the global callback
+                                       jQuery.event.trigger( "ajaxError" );
+                               }
+                               
+                               // The request was completed
+                               jQuery.event.trigger( "ajaxComplete" );
+                               
+                               // Handle the global AJAX counter
+                               if ( ! --jQuery.active )
+                                       jQuery.event.trigger( "ajaxStop" );
+       
+                               // Process result
+                               if ( ret ) ret(xml);
+                       }
+               }
+       
+               // Send the data
+               xml.send(data);
+       },
+       
+       // 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 ?
+                               ( r.status >= 200 && r.status < 300 ) || r.status == 304 :
+                               location.protocol == "file:";
+               } 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.
+       httpData: function(r,type) {
+               var ct = r.getResponseHeader("content-type");
+               var xml = ( !type || type == "xml" ) && ct && ct.indexOf("xml") >= 0;
+               return xml ? r.responseXML : r.responseText;
+       },
+       
+       // 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 )
+                       // 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 )
+                               s.push( j + "=" + encodeURIComponent( a[j] ) );
+               
+               // Return the resulting serialization
+               return s.join("&");
+       }
+
+});