--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/js/modules/mediafragment.js	Fri Apr 06 16:55:34 2012 +0200
@@ -0,0 +1,121 @@
+/* mediafragment module */
+
+IriSP.MediaFragment = function(Popcorn, config, Serializer) {
+  IriSP.Module.call(this, Popcorn, config, Serializer);
+
+  this.mutex = false; /* a mutex because we access the url from two different functions */
+
+  this._Popcorn.listen( "loadedmetadata", IriSP.wrap(this,this.advanceTime));
+  this._Popcorn.listen( "pause", IriSP.wrap(this,this.updateTime));
+  this._Popcorn.listen( "seeked", IriSP.wrap(this,this.updateTime));
+  this._Popcorn.listen( "IriSP.PolemicTweet.click", IriSP.wrap(this,this.updateAnnotation));
+  this._Popcorn.listen( "IriSP.SegmentsWidget.click", IriSP.wrap(this,this.updateAnnotation));
+  
+  window.onhashchange = IriSP.wrap(this, this.advanceTime);
+};
+
+IriSP.MediaFragment.prototype = new IriSP.Module();
+
+IriSP.MediaFragment.prototype.advanceTime = function() {
+             var url = window.location.href;
+
+              if ( url.split( "#" )[ 1 ] != null ) {
+                  pageoffset = url.split( "#" )[1];
+
+                  if ( pageoffset.substring(0, 2) === "t=") {
+                    // timecode 
+                    if ( pageoffset.substring( 2 ) != null ) {
+                    var offsettime = pageoffset.substring( 2 );
+                    this._Popcorn.currentTime( parseFloat(offsettime) );
+                    
+                    /* we have to trigger this signal manually because of a
+                     bug in the jwplayer */
+                    this._Popcorn.trigger("seeked", parseFloat(offsettime));
+                    }
+                  } else if ( pageoffset.substring(0, 3) === "id=") {
+                    // annotation
+                    var annotationId = pageoffset.substring( 3 );
+                    // there's no better way than that because
+                    // of possible race conditions
+                    this._serializer.sync(IriSP.wrap(this, function() {
+                          this.lookupAnnotation.call(this, annotationId); 
+                          }));
+                  }
+              }
+};
+
+/** handler for the seeked signal. It may have or may have not an argument.
+    @param time if not undefined, the time we're seeking to 
+*/
+IriSP.MediaFragment.prototype.updateTime = function(time) {
+  if (this.mutex === true) {
+    return;
+  }
+
+  var history = window.history;
+  if ( !history.pushState ) {
+    return false;
+  }
+    
+  if (IriSP.null_or_undefined(time) || typeof(time) != "number") {
+    var ntime = this._Popcorn.currentTime().toFixed(2)
+  } else {
+    var ntime = time.toFixed(2);
+  }
+
+  // used to relay the new hash to the embedder
+  this._Popcorn.trigger("IriSP.Mediafragment.hashchange", "#t=" + ntime);
+  
+  splitArr = window.location.href.split( "#" )
+  history.replaceState( {}, "", splitArr[0] + "#t=" + ntime );
+};
+
+
+IriSP.MediaFragment.prototype.updateAnnotation = function(annotationId) {
+  var _this = this;
+  this.mutex = true;
+
+  var history = window.history;
+  if ( !history.pushState ) {
+    return false;
+  }
+ 
+  
+  // used to relay the new hash to the embedder
+  this._Popcorn.trigger("IriSP.Mediafragment.hashchange", "#id=" + annotationId);
+  
+  splitArr = window.location.href.split( "#" )
+  history.replaceState( {}, "", splitArr[0] + "#id=" + annotationId);
+
+  
+  // reset the mutex afterwards to prevent the module from reacting to his own changes.
+  window.setTimeout(function() { _this.mutex = false }, 50);
+};
+
+// lookup and seek to the beginning of an annotation
+IriSP.MediaFragment.prototype.lookupAnnotation = function(annotationId) {
+  var _this = this;
+  this.mutex = true;
+
+  var annotation = undefined;
+  var annotations = this._serializer._data.annotations;
+
+  var i;
+  for (i = 0; i < annotations.length; i++) {
+      if (annotations[i].id === annotationId) {
+        annotation = annotations[i];
+        break;
+      }
+  }
+
+  if (typeof(annotation) !== "undefined") {
+    this._Popcorn.currentTime(annotation.begin / 1000);
+
+    /* we have to trigger this signal manually because of a
+     bug in the jwplayer */
+    this._Popcorn.trigger("seeked", annotation.begin / 1000);
+    this._Popcorn.trigger("IriSP.Mediafragment.showAnnotation", annotationId);
+  }
+  
+  window.setTimeout(function() { _this.mutex = false }, 50);
+};