The Tor Browser / file revision

 const Ci = SpecialPowers.Ci;

 const Cc = SpecialPowers.Cc;

 ok(Ci != null, "Access Ci");

 ok(Cc != null, "Access Cc");

 var didDialog;

 var isSelectDialog = false;

 var isTabModal = false;

 var usePromptService = true;

 var timer; // keep in outer scope so it's not GC'd before firing

 function startCallbackTimer() {

     didDialog = false;

     // Delay before the callback twiddles the prompt.

     const dialogDelay = 10;

     // Use a timer to invoke a callback to twiddle the authentication dialog

     timer = Cc["@mozilla.org/timer;1"].createInstance(Ci.nsITimer);

     timer.init(observer, dialogDelay, Ci.nsITimer.TYPE_ONE_SHOT);

 }

 var observer = {

     QueryInterface : function (iid) {

         const interfaces = [Ci.nsIObserver,

                             Ci.nsISupports, Ci.nsISupportsWeakReference];

         if (!interfaces.some( function(v) { return iid.equals(v) } ))

             throw SpecialPowers.Cr.NS_ERROR_NO_INTERFACE;

         return this;

     },

     observe : SpecialPowers.wrapCallback(function (subject, topic, data) {

       try {

         if (isTabModal) {

           var promptBox = getTabModalPromptBox(window);

           ok(promptBox, "got tabmodal promptbox");

           var prompts = SpecialPowers.wrap(promptBox).listPrompts();

           if (prompts.length)

               handleDialog(prompts[0].Dialog.ui, testNum);

           else

               startCallbackTimer(); // try again in a bit

         } else {

           var doc = getDialogDoc();

           if (isSelectDialog && doc)

               handleDialog(doc, testNum);

           else if (doc)

               handleDialog(doc.defaultView.Dialog.ui, testNum);

           else

               startCallbackTimer(); // try again in a bit

         }

       } catch (e) {

         ok(false, "Exception thrown in the timer callback: " + e + " at " + (e.fileName || e.filename) + ":" + (e.lineNumber || e.linenumber));

       }

     })

 };

 function getTabModalPromptBox(domWin) {

     var promptBox = null;

     // Given a content DOM window, returns the chrome window it's in.

     function getChromeWindow(aWindow) {

         var chromeWin = SpecialPowers.wrap(aWindow).QueryInterface(Ci.nsIInterfaceRequestor)

                                .getInterface(Ci.nsIWebNavigation)

                                .QueryInterface(Ci.nsIDocShell)

                                .chromeEventHandler.ownerDocument.defaultView;

         return chromeWin;

     }

     try {

         // Get the topmost window, in case we're in a frame.

         var promptWin = domWin.top;

         // Get the chrome window for the content window we're using.

         var chromeWin = getChromeWindow(promptWin);

         if (chromeWin.getTabModalPromptBox)

             promptBox = chromeWin.getTabModalPromptBox(promptWin);

     } catch (e) {

         // If any errors happen, just assume no tabmodal prompter.

     }

     // Callers get confused by a wrapped promptBox here.

     return SpecialPowers.unwrap(promptBox);

 }

 function getDialogDoc() {

   // Trudge through all the open windows, until we find the one

   // that has either commonDialog.xul or selectDialog.xul loaded.

   var wm = Cc["@mozilla.org/appshell/window-mediator;1"].

            getService(Ci.nsIWindowMediator);

   //var enumerator = wm.getEnumerator("navigator:browser");

   var enumerator = wm.getXULWindowEnumerator(null);

   while (enumerator.hasMoreElements()) {

     var win = enumerator.getNext();

     var windowDocShell = win.QueryInterface(Ci.nsIXULWindow).docShell;

     var containedDocShells = windowDocShell.getDocShellEnumerator(

                                       Ci.nsIDocShellTreeItem.typeChrome,

                                       Ci.nsIDocShell.ENUMERATE_FORWARDS);

     while (containedDocShells.hasMoreElements()) {

         // Get the corresponding document for this docshell

         var childDocShell = containedDocShells.getNext();

         // We don't want it if it's not done loading.

         if (childDocShell.busyFlags != Ci.nsIDocShell.BUSY_FLAGS_NONE)

           continue;

         var childDoc = childDocShell.QueryInterface(Ci.nsIDocShell)

                                     .contentViewer

                                     .DOMDocument;

         //ok(true, "Got window: " + childDoc.location.href);

         if (childDoc.location.href == "chrome://global/content/commonDialog.xul")

           return childDoc;

         if (childDoc.location.href == "chrome://global/content/selectDialog.xul")

           return childDoc;

     }

   }

   return null;

 }