Re: Having trouble with Embedding Mozilla

An update on my question.  I finally got it to work.  Now the embedded mozilla can run my simple xul app just fine and a window can pop up.

My question now becomes how I can access java classes from javascripts running in the embedded xul app?  If I use java xpcom, will the xul app try to create another VM instance using java plugin?  I certainly want the VM to be the same as the embedding VM.

Thanks for any input you have!

J.J. Zhuang


----- "J.J. Zhuang" <[email protected]> wrote:
> I'm trying out embedding mozilla in my java program.  I followed the
> example give at this URL:
> 
> http://developer.mozilla.org/en/docs/JavaXPCOM:Embedding_Mozilla_in_a_Java_Application_using_JavaXPCOM
> 
> Here's my code:
> 
> public class SimpleLauncher {
> 
>     public static class LocationProvider implements
> IAppFileLocProvider {
> 
>         File grePath;
> 
>         public LocationProvider(File grePath) {
>             this.grePath = grePath;
>         }
> 
>         public File getFile(String aProp, boolean[] aPersistent) {
>             System.out.println(aProp);
>             System.out.println(aPersistent);
> 
>             File file = null;
>             if (aProp.equals("GreD") || aProp.equals("GreComsD")) {
>                 file = grePath;
>                 if (aProp.equals("GreComsD")) {
>                     file = new File(file, "components");
>                 }
>             } else if (aProp.equals("MozBinD") ||
> aProp.equals("CurProcD")
>                     || aProp.equals("ComsD") || aProp.equals("ProfD"))
> {
>                 file = grePath;
>                 if (aProp.equals("ComsD")) {
>                     file = new File(file, "components");
>                 }
>             }
>             return file;
>         }
> 
>         public File[] getFiles(String aProp) {
>             System.out.println(aProp);
> 
>             File[] files = null;
>             if (aProp.equals("APluginsDL")) {
>                 files = new File[1];
>                 files[0] = new File(grePath, "plugins");
>             }
>             return files;
>         }
>     }
> 
>    public static void main(String[] args) {
> 
>         Mozilla mozilla = Mozilla.getInstance();
>         GREVersionRange[] range = new GREVersionRange[1];
>         range[0] = new GREVersionRange("1.8.0", true, "1.9", false);
>         // work with trunk nightly version 1.9a1
> 
>         try {
>             File grePath = Mozilla.getGREPathWithProperties(range,
> null);
>             System.out.println(grePath.toString());
> 
>             mozilla.initialize(grePath);
>             LocationProvider locProvider = new
> LocationProvider(grePath);
>             mozilla.initEmbedding(grePath, grePath, locProvider);
> 
>             // Now we need to start an XUL application, so we get an
> instance of
>             // the
>             // XPCOM service manager
>             nsIServiceManager serviceManager =
> mozilla.getServiceManager();
> 
>             // Now we need to get the
> @mozilla.org/toolkit/app-startup;1
>             // service:
>             nsIAppStartup appStartup = (nsIAppStartup) serviceManager
>                     .getServiceByContractID(
>                             "@mozilla.org/toolkit/app-startup;1",
>                             nsIAppStartup.NS_IAPPSTARTUP_IID);
> 
>             // Get the nsIWindowWatcher interface to the above
>             nsIWindowCreator windowCreator = (nsIWindowCreator)
> appStartup
>                    
> .queryInterface(nsIWindowCreator.NS_IWINDOWCREATOR_IID);
> 
>             // Get the window watcher service
>             nsIWindowWatcher windowWatcher = (nsIWindowWatcher)
> serviceManager
>                     .getServiceByContractID(
>                             "@mozilla.org/embedcomp/window-watcher;1",
>                             nsIWindowWatcher.NS_IWINDOWWATCHER_IID);
> 
>             // Set the window creator (from step 6)
>             windowWatcher.setWindowCreator(windowCreator);
> 
>             // Create the root XUL window:
>             nsIDOMWindow win = windowWatcher.openWindow(null,
>                     "chrome://your-app/content/window.xul",
> "mywindow",
>                     "chrome,resizable,centerscreen", null);
> 
>             // Set this as the active window
>             windowWatcher.setActiveWindow(win);
> 
>             // Hand over the application to xpcom/xul, this will
> block:
>             appStartup.run();
> 
>         } catch (FileNotFoundException e) {
>             // this exception is thrown if greGREPathWithProperties
> cannot find
>             // a GRE
>         } catch (XPCOMException e) {
>             // this exception is thrown if initEmbedding failed
>         }
> 
>     }
> }
> 
> I can see that the correct xulrunner is found and the
> LocationProvider.getFile() is being called.  Obviously the url
> "chrome://your-app/content/window.xul" should be replaced with
> something real.  But no matter what I try nothing happens.  I don't
> see any window popping up.  I'm on Mac OS X and have not tried this on
> Windows.  Has anyone ever got this to work following the instructions?
> 
> Thanks for your  help!
> 
> J.J. Zhuang