Re: Sample client

OK that works - I got XPCOM to inialize. Does that mean it is 'talking' with the currently running Netscape/Mozilla application or is this a separate entity? I am trying to write a C++ application that will communicate with the current 
Netscape browser to tell it to load another page in the top-most browser window. This seems to be much harder than I thought - I am probably missing some fundimental point that simplifies the whole thing.

I have the following code (which fails to get the window):

	try {
		nsCOMPtr<nsIThread> thread_check;
		// xpcom appears to assert if already initialized
		// Is there an official way to determine this?
		if (NS_FAILED(nsIThread::GetMainThread(getter_AddRefs(thread_check)))) {
			printf("XPCOM not initialized yet!\n");
#if 1
			const char *path = "C:\\Program Files\\Netscape\\Netscape 6";
#else
			const char *path = "D:\\Netscape\\Mozilla\\mozilla.v0.9.9\\mozilla\\dist\\WIN32_O.OBJ\\bin";
#endif
			nsCOMPtr<nsILocalFile> componentPath;
			NS_NewLocalFile(path, PR_TRUE, getter_AddRefs(componentPath));
	
//-initXPCOM
			nsIServiceManager *serviceManager=0;
			nsResult = NS_InitXPCOM2(&serviceManager, componentPath, nsnull);
			if (NS_FAILED(nsResult)) throw Sprintf("%s:%d   nsResult:%x",__FILE__,__LINE__,nsResult);
			else printf("%s:%d   nsResult:%x\n",__FILE__,__LINE__,nsResult);

			nsResult = nsIThread::GetMainThread(getter_AddRefs(thread_check));
			if (NS_FAILED(nsResult)) throw Sprintf("%s:%d   nsResult:%x",__FILE__,__LINE__,nsResult);
			else printf("%s:%d   nsResult:%x\n",__FILE__,__LINE__,nsResult);

//-nsIWindowsMediator
			nsCOMPtr<nsIWindowMediator> mediator=0;
			mediator = do_GetService(NS_RDF_DATASOURCE_CONTRACTID_PREFIX "window-mediator");
			if (mediator == 0) throw Sprintf("%s:%d   mediator:0x%p",__FILE__,__LINE__,mediator);
			else printf("%s:%d   mediator:0x%p\n",__FILE__,__LINE__,mediator);

//-nsIDOMWindowInternal
			nsCOMPtr<nsIDOMWindowInternal> window=0;
			nsResult = mediator->GetMostRecentWindow(nsnull,getter_AddRefs(window));			// <---------------- Fails: window is always 0
			if (NS_FAILED(nsResult) || (window==0)) throw Sprintf("%s:%d   window:0x%p   nsResult:%x",__FILE__,__LINE__,window,nsResult);
			else printf("%s:%d   window:0x%p   nsResult:%x\n",__FILE__,__LINE__,window,nsResult);

//-nsIDOMNavigator
			nsIDOMNavigator* navigator=0;
			nsResult = window->GetNavigator(&navigator);
			if (NS_FAILED(nsResult)) throw Sprintf("%s:%d   nsResult:%x",__FILE__,__LINE__,nsResult);
			else printf("%s:%d   nsResult:%x\n",__FILE__,__LINE__,nsResult);

			nsString userAgent;
			nsResult = navigator->GetUserAgent(userAgent);
			if (NS_FAILED(nsResult)) throw Sprintf("%s:%d   nsResult:%x",__FILE__,__LINE__,nsResult);
			else printf("%s:%d   nsResult:%x\n",__FILE__,__LINE__,nsResult);
			printf("User Agent: '%p'\n",userAgent.get());
		}
	}
	catch (const char *e) {printf("\n\nException was raised:\n%s\n\n",e);}
	catch (...) {printf("Exception was raised!\n");}

	nsResult = NS_ShutdownXPCOM(nsnull);
	if (NS_FAILED(nsResult)) return(printf("NS_ShutdownXPCOM() == [%x]\n",nsResult));
	else printf("NS_ShutdownXPCOM() OK\n");





On Thu, 02 May 2002 14:25:40 +1000, Mark Hammond <[email protected]> wrote:
> RL Clippard wrote:
> > Does  "nsResult = NS_InitXPCOM2(nsnull, nsnull, nsnull);" have to supply the
> > directory to the Netscape components or does it 'know'? 
> 
> On Windows you have to tell it.  Linux knows.  I can't recall the 
> details of exactly why, but this was certainly the case 18 months ago. 
> I guess it is still the same.
> 
> > Also my version of
> > Netscape (6.2) xpcom.dll does not allow NS_InitXPCOM2() - I assumed this is
> > just a minor issue so I am using the xpcom.dll that came with mozilla.9.9.
> > 
> > //-nsLocalFile
> >      nsCOMPtr<nsILocalFile> componentPath=0;
> >      componentPath= do_CreateInstance(NS_LOCAL_FILE_CONTRACTID,&nsResult);
> > 
> >      const char *path = "C:\\Program Files\\Netscape\\Netscape 6";
> > // Where Netscape is installed
> >      nsResult = componentPath->InitWithPath(path);
> > 
> >      PRBool isDirectory;
> >      nsResult = componentPath->IsDirectory(&isDirectory);
> >      printf("%s ---<%s>--- a directory\n",path,isDirectory?"IS":"IS NOT");
> > // This works (is indeed a directory)
> > 
> > //-initXPCOM
> >      nsIServiceManager *serviceManager=0;
> >      nsResult = NS_InitXPCOM2(&serviceManager, componentPath, nsnull);
> > // This fails! ---> 0x80004005
> 
> This is from the PyXPCOM code (mozilla/extensions/python/xpcom)
> 
> ....
>      nsCOMPtr<nsIThread> thread_check;
>      // xpcom appears to assert if already initialized
>      // Is there an official way to determine this?
>      if 
> (NS_FAILED(nsIThread::GetMainThread(getter_AddRefs(thread_check)))) {
>          // not already initialized.
> 
>          // We need to locate the Mozilla bin directory.
> #ifdef XP_WIN			
>          // On Windows this by using "xpcom.dll"
> 
>          char landmark[MAX_PATH+1];
>          HMODULE hmod = GetModuleHandle("xpcom.dll");
>          if (hmod==NULL) {
>              PyErr_SetString(PyExc_RuntimeError, "We dont appear to be 
> linked against xpcom.dll!?!?");
>              return PR_FALSE;
>          }
>          GetModuleFileName(hmod, landmark, 
> sizeof(landmark)/sizeof(landmark[0]));
>          char *end = landmark + (strlen(landmark)-1);
>          while (end > landmark && *end != '\\')
>              end--;
>          if (end > landmark) *end = '\0';
> 
>          nsCOMPtr<nsILocalFile> ns_bin_dir;
>          NS_NewLocalFile(landmark, PR_FALSE, getter_AddRefs(ns_bin_dir));
>          nsresult rv = NS_InitXPCOM2(nsnull, ns_bin_dir, nsnull);
> #else
>          // Elsewhere, Mozilla can find it itself (we hope!)
>          nsresult rv = NS_InitXPCOM2(nsnull, nsnull, nsnull);
> #endif // XP_WIN			
>          if (NS_FAILED(rv)) {
> ....
> 
> Mark.
>