jQuery is now JSLint (jslint.com) compatible, save for the eval stuff. Can't there b
[jquery.git] / ajax / ajax.js
index 87eadbf..a972871 100644 (file)
 // http://jquery.com/docs/ajax/
 
 if ( typeof XMLHttpRequest == 'undefined' && typeof window.ActiveXObject == 'function') {
-  var XMLHttpRequest = function() {
-    return new ActiveXObject((navigator.userAgent.toLowerCase().indexOf('msie 5') >= 0) ? 
-      "Microsoft.XMLHTTP" : "Msxml2.XMLHTTP");
-  };
+       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();
+       var xml = new XMLHttpRequest();
+
+       if ( xml ) {
+               //
+               // Increase the query counter
+               $.xmlActive++;
+
+               //
+               // Show loader if needed
+               if ($.xmlCreate) {
+                       $.xmlCreate();
+               }
+
+               //
+               // 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');
+               }
 
-  if ( xml ) {
-    xml.open(type || "GET", url, true);
+               xml.onreadystatechange = function() {
+                       if ( xml.readyState == 4 ) {
+                               if ( ret ) { ret(xml); }
 
-    if ( data )
-      xml.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
+                               //
+                               // Decrease counter
+                               $.xmlActive--;
 
-    if ( ret )
-      xml.onreadystatechange = function() {
-        if ( xml.readyState == 4 ) ret(xml);
-      };
+                               //
+                               // Hide loader if needed
+                               if ($.xmlActive <= 0) {
+                                       if ($.xmlDestroy) {
+                                               $.xmlDestroy();
+                                       }
+                               }
+                       }
+               };
 
-    xml.send(data)
-  }
+               xml.send(data);
+       }
 };
 
 $.httpData = function(r,type) {
-  return r.getResponseHeader("content-type").indexOf("xml") > 0 || type == "xml" ?
-    r.responseXML : r.responseText;
+       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) );
-  });
+       $.xml( "GET", url, null, function(r) {
+               if ( ret ) { ret( $.httpData(r,type) ); }
+       });
 };
 
 $.getXML = function( url, ret ) {
-  $.get( url, ret, "xml" );
+       $.get( url, ret, "xml" );
 };
 
 $.post = function( url, data, ret, type ) {
-  $.xml( "POST", url, $.param(data), function(r) {
-    if ( ret ) ret( $.httpData(r,type) );
-  });
+       $.xml( "POST", url, $.param(data), function(r) {
+               if ( ret ) { ret( $.httpData(r,type) ); }
+       });
 };
 
 $.postXML = function( url, data, ret ) {
-  $.post( url, data, ret, "xml" );
+       $.post( url, data, ret, "xml" );
 };
 
 $.param = function(a) {
-  var s = [];
-  for ( var i in a )
-    s[s.length] = i + "=" + encodeURIComponent( a[i] );
-  return s.join("&");
+       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!!
-  // 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";
-  }
-  var self = this;
-  $.xml(t,a,o,function(h){
-  var h = h.responseText;
-    self.html(h).find("script").each(function(){
-      try {
-        eval( this.text || this.textContent || this.innerHTML );
-      } catch(e){}
-    });
-    if(f)f(h);
-  });
-  return this;
+       // Arrrrghhhhhhhh!!
+       // 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";
+       }
+       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){}
+               });
+               if(f){f(h);}
+       });
+       return this;
+};
+
+/**
+ * function:   $.fn.formValues
+ * usage:              $('#frmLogin').formValues()
+ * docs:                       Gets the form values and creates a key=>value array of the found values (only for ENABLED elements!)
+ */
+$.fn.formValues = function() {
+       var a = [];
+       this.find("input[@type='submit'],input[@type='hidden'],textarea,input[@checked],input[@type='password'],input[@type='text'],option[@selected]").filter(":enabled").each(function() {
+                       o = {};
+                       o.name = this.name || this.id || this.parentNode.name || this.parentNode.id;
+                       o.value = this.value;
+                       a.push(o);
+               });
+       return a;
+};
+
+/**
+ * function:   $.update
+ * usage:              $.update('someJQueryObject', 'someurl', 'array');
+ * docs:                       Mimics the ajaxUpdater from prototype. Posts the key=>value array to the url and
+ *                                     puts the results from that call in the jQuery object specified.
+ *                                     --> If you set the blnNoEval to true, the script tags are NOT evaluated.
+ */
+$.update = function(objElement, strURL, arrValues, fncCallback) {
+       $.post(strURL, arrValues, function(strHTML) {
+               //
+               // Update the element with the new HTML
+               objElement.html(strHTML);
+
+               //
+               // Evaluate the scripts
+               objElement.html(strHTML).find("script").each(function(){
+                       try { eval( this.text || this.textContent || this.innerHTML ); } catch(e){}
+               });
+
+               //
+               // Callback handler
+               if (fncCallback) { fncCallback(); }
+       });
 };