wp-includes/js/wp-ajax.js

   1 var WPAjax = Class.create();
   2 Object.extend(WPAjax.prototype, Ajax.Request.prototype);
   3 Object.extend(WPAjax.prototype, {
   4         WPComplete: false, // onComplete function
   5         WPError: false, // onWPError function
   6         defaultUrl: '', // We get these from WPAjaxL10n
   7         permText: '',
   8         strangeText: '',
   9         whoaText: '',
  10
  11         initialize: function(url, responseEl) {
  12                 var tempObj = this;
  13                 this.transport = Ajax.getTransport();
  14                 if ( !this.transport )
  15                         return false;
  16                 this.setOptions( {
  17                         parameters: 'cookie=' + encodeURIComponent(document.cookie),
  18                         onComplete: function(transport) { // transport = XMLHttpRequest object
  19                                 if ( tempObj.parseAjaxResponse() ) {
  20                                         if ( 'function' == typeof tempObj.WPComplete )
  21                                                 tempObj.WPComplete(transport);
  22                                 } else if ( 'function' == typeof tempObj.WPError ) // if response corresponds to an error (bad data, say, not 404)
  23                                         tempObj.WPError(transport);
  24                         }
  25                 });
  26                 this.url = url ? url : this.defaultUrl;
  27                 this.getResponseElement(responseEl);
  28         },
  29         addArg: function(key, value) {
  30                 var a = $H();
  31                 a[encodeURIComponent(key)] = encodeURIComponent(value);
  32                 this.options.parameters = $H(this.options.parameters).merge(a);
  33         },
  34         getResponseElement: function(r) {
  35                 var p = $(r + '-p');
  36                 if ( !p ) {
  37                         new Insertion.Bottom(r, "<span id='" + r + "-p'></span>");
  38                         var p = $(r + '-p');
  39                 }
  40                 this.myResponseElement = p;
  41         },
  42         parseAjaxResponse: function() { // 1 = good, 0 = strange (bad data?), -1 = you lack permission
  43                 if ( this.transport.responseXML && typeof this.transport.responseXML == 'object' && ( this.transport.responseXML.xml || 'undefined' == typeof this.transport.responseXML.xml ) ) {
  44                         var err = this.transport.responseXML.getElementsByTagName('wp_error');
  45                         if ( err[0] ) {
  46                                 var msg = $A(err).inject( '', function(a, b) { return a + '<p>' + b.firstChild.nodeValue + '</p>'; } );
  47                                 Element.update(this.myResponseElement,'<div class="error">' + msg + '</div>');
  48                                 return false;
  49                         }
  50                         return true;
  51                 }
  52                 var r = this.transport.responseText;
  53                 if ( isNaN(r) ) {
  54                         Element.update(this.myResponseElement,'<div class="error"><p>' + r + '</p></div>');
  55                         return false;
  56                 }
  57                 var r = parseInt(r,10);
  58                 if ( -1 == r ) {
  59                         Element.update(this.myResponseElement,"<div class='error'><p>" + this.permText + "</p></div>");
  60                         return false;
  61                 } else if ( 0 == r ) {
  62                         Element.update(this.myResponseElement,"<div class='error'><p>" + this.strangeText + "</p></div>");
  63                         return false;
  64                 }
  65                 return true;
  66         },
  67         addOnComplete: function(f) {
  68                 if ( 'function' == typeof f ) { var of = this.WPComplete; this.WPComplete = function(t) { if ( of ) of(t); f(t); } }
  69         },
  70         addOnWPError: function(f) {
  71                 if ( 'function' == typeof f ) { var of = this.WPError; this.WPError = function(t) { if ( of ) of(t); f(t); } }
  72         },
  73         notInitialized: function() {
  74                 return this.transport ? false : true;
  75         }
  76 });
  77
  78 Event.observe( window, 'load', function() { Object.extend(WPAjax.prototype, WPAjaxL10n); }, false )
  79
  80 Ajax.activeSendCount = 0;
  81 Ajax.Responders.register( {
  82         onCreate: function() {
  83                 Ajax.activeSendCount++;
  84                 if ( 1 != Ajax.activeSendCount )
  85                         return;
  86                 wpBeforeUnload = window.onbeforeunload;
  87                 window.onbeforeunload = function() {
  88                         return WPAjax.whoaText;
  89                 }
  90         },
  91         onLoading: function() { // Can switch to onLoaded if we lose data
  92                 Ajax.activeSendCount--;
  93                 if ( 0 != Ajax.activeSendCount )
  94                         return;
  95                 window.onbeforeunload = wpBeforeUnload;
  96         }
  97 });
  98
  99 //Pretty func adapted from ALA http://www.alistapart.com/articles/gettingstartedwithajax
 100 function getNodeValue(tree,el){try { var r = tree.getElementsByTagName(el)[0].firstChild.nodeValue; } catch(err) { var r = null; } return r; }