skins/ajax_scripts/fragment_importer.js

   1 // (c) Benoît PIN 2006-2007
   2 // http://plinn.org
   3 // Licence GPL
   4 //
   5 //
   6
   7 var FragmentImporter;
   8
   9 (function(){
  10
  11 var isTextMime = /^text\/.+/i;
  12
  13 FragmentImporter = function(url, onAfterPopulate) {
  14         var thisImporter = this;
  15         this.url = url;
  16         this.onAfterPopulate = (!onAfterPopulate) ? function(){return;} : onAfterPopulate;
  17 };
  18
  19 FragmentImporter.prototype._load = function(url) {
  20         var req = new XMLHttpRequest();
  21         var thisImporter = this;
  22         req.onreadystatechange = function() {
  23                 switch (req.readyState) {
  24                         case 1 :
  25                                 showProgressImage();
  26                                 break;
  27                         case 2 :
  28                                 try {
  29                                         if (! isTextMime.exec(req.getResponseHeader('Content-Type'))) {
  30                                                 req.onreadystatechange = null;
  31                                                 req.abort();
  32                                                 hideProgressImage();
  33                                                 window.location.href = thisImporter._fallBackUrl;
  34                                         }
  35                                 }
  36                                 catch(e){}
  37                                 break;
  38                         case 4 :
  39                                 hideProgressImage();
  40                                 if (req.status === 200) {
  41                                         thisImporter.populateBaseElement(req); }
  42                                 else {
  43                                         alert('Error: ' + req.status); }
  44                                 break;
  45                 }
  46         };
  47
  48         req.open("GET", url, true);
  49         req.send(null);
  50 };
  51
  52 FragmentImporter.prototype.load = function(fallBackUrl) {
  53         if (fallBackUrl) {
  54                 this._fallBackUrl = fallBackUrl; }
  55         else {
  56                 this._fallBackUrl = this.url; }
  57         this._load(this.url);
  58 };
  59
  60 FragmentImporter.prototype.useMacro = function(template, macro, fragmentId, queryString) {
  61         var url = this.url + "/use_macro?template=" + template + "&macro=" + macro + "&fragmentId=" + fragmentId;
  62         if (queryString) {
  63                 url += '&' + queryString; }
  64         this._load(url);
  65 };
  66
  67
  68 FragmentImporter.prototype.populateBaseElement = function(req) {
  69         // :( IE : innerHTML is read-only for these tags:
  70         // COL, COLGROUP, FRAMESET, HTML, STYLE, TABLE, TBODY, TFOOT, THEAD, TITLE, TR
  71         var contentType = req.getResponseHeader('Content-Type');
  72         if (! isTextMime.exec(contentType)) {
  73                 window.location.href = this._fallBackUrl;
  74                 return;
  75         }
  76         if (contentType.indexOf('text/xml') !== -1) {
  77                 var fragments = req.responseXML.documentElement.childNodes;
  78                 var element, dest, scripts, i, j;
  79                 for (i=0 ; i < fragments.length ; i++) {
  80                         element = fragments[i];
  81                         switch (element.nodeName) {
  82                                 case 'fragment' :
  83                                         dest = document.getElementById(element.getAttribute('id'));
  84                                         if(dest) {
  85                                                 dest.innerHTML = element.firstChild.nodeValue;
  86                                                 scripts = dest.getElementsByTagName('script');
  87                                                 for (j=0 ; j < scripts.length ; j++) {
  88                                                         globalScriptRegistry.loadScript(scripts[j]); }
  89                                         }
  90                                         break;
  91                                 case 'base' :
  92                                         var headBase = document.getElementsByTagName('base');
  93                                         if (headBase.length > 0) {
  94                                                 headBase[0].setAttribute('href', element.getAttribute('href'));
  95                                         }
  96                                         else {
  97                                                 headBase = document.createElement('base');
  98                                                 headBase.setAttribute('href', element.getAttribute('href'));
  99                                                 document.head.appendChild(headBase);
 100                                         }
 101                                         break;
 102                         }
 103                 }
 104         }
 105         this.onAfterPopulate();
 106 };
 107
 108 }());