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   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; }