Bug 619412 - PanFinished is not fired on the same element as PanBegin [r=mfinkle]

mobile/chrome/content/browser-ui.js

@@ -446,7 +446,8 @@ var BrowserUI = {
     tabs.addEventListener("TabSelect", this, true);
     tabs.addEventListener("TabOpen", this, true);
     tabs.addEventListener("TabOpen", NewTabPopup, true);
-    window.addEventListener("PanFinished", this, true);
+
+    Elements.browsers.addEventListener("PanFinished", this, true);
 
     // listen content messages
     messageManager.addMessageListener("DOMLinkAdded", this);

mobile/chrome/content/browser.js

@@ -1150,7 +1150,7 @@ Browser.MainDragger = function MainDragger() {
   this._scrollScales = { x: 0, y: 0 };
 
   Elements.browsers.addEventListener("PanBegin", this, false);
-  window.addEventListener("PanFinished", this, false);
+  Elements.browsers.addEventListener("PanFinished", this, false);
   Elements.contentNavigator.addEventListener("SizeChanged", this, false);
 };
 

mobile/chrome/content/input.js

@@ -94,6 +94,7 @@ function MouseModule() {
   this._inputField = null;
 
   this._downUpEvents = [];
+  this._targetScrollbox = null;
   this._targetScrollInterface = null;
   this._suppressNextMouseUp = false;
 
@@ -169,6 +170,7 @@ MouseModule.prototype = {
     // made kinetic panning active.
     this._kinetic.end();
 
+    this._targetScrollbox = null;
     this._targetScrollInterface = null;
 
     this._cleanClickBuffer();
@@ -193,6 +195,7 @@ MouseModule.prototype = {
     if (this._kinetic.isActive() && this._dragger != dragger)
       this._kinetic.end();
 
+    this._targetScrollbox = targetScrollbox;
     this._targetScrollInterface = targetScrollInterface;
 
     // Do tap
@@ -304,7 +307,7 @@ MouseModule.prototype = {
 
           let event = document.createEvent("Events");
           event.initEvent("PanBegin", true, false);
-          aEvent.target.dispatchEvent(event);
+          this._targetScrollbox.dispatchEvent(event);
         }
       }
     }
@@ -392,11 +395,9 @@ MouseModule.prototype = {
       this._dragger.dragStop(0, 0, this._targetScrollInterface);
       this._dragger = null;
 
-      // bug 619412
-      // XXX why is PanFinished not dispatched on the same target as PanBegin
       let event = document.createEvent("Events");
       event.initEvent("PanFinished", true, false);
-      document.dispatchEvent(event);
+      this._targetScrollbox.dispatchEvent(event);
     }
   },