michael@0: /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
michael@0:  *
michael@0:  * This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #include "nsIServiceManager.h"
michael@0: #include "nsCOMPtr.h"
michael@0: #include "nsCNativeApp.h"
michael@0: #include "nsIEventLoop.h"
michael@0: #include <windows.h>
michael@0: 
michael@0: static NS_DEFINE_CID(kNativeAppCID, NS_NATIVE_APP_CID);
michael@0: 
michael@0: LRESULT CALLBACK WndProc(HWND wnd, UINT msg, WPARAM wParam, LPARAM lParam);
michael@0: 
michael@0: void ErrorBox(LPSTR text)
michael@0: {
michael@0: 	MessageBox(nullptr, text, "XP Event Loop", MB_OK | MB_ICONSTOP);
michael@0: }
michael@0: 
michael@0: void InfoBox(LPSTR text)
michael@0: {
michael@0: 	MessageBox(nullptr, text, "XP Event Loop", MB_OK | MB_ICONINFORMATION);
michael@0: }
michael@0: 
michael@0: int WINAPI WinMain(HINSTANCE inst, 
michael@0:                    HINSTANCE prevInstance, 
michael@0:                    LPSTR lpszCmdLine,
michael@0:                    int nShowCmd)
michael@0: {
michael@0: 	char* lpszAppName = "HelloWorld";
michael@0: 	HWND wnd;
michael@0: 	WNDCLASSEX wndclass;
michael@0: 	int retCode;
michael@0: 
michael@0:     {	//  Needed to scope all nsCOMPtr within XPCOM Init and Shutdown
michael@0:       nsresult rv;
michael@0:       nsCOMPtr<nsIServiceManager> servMan;
michael@0:       rv = NS_InitXPCOM2(getter_AddRefs(servMan), nullptr, nullptr);
michael@0:       if(NS_FAILED(rv))
michael@0:       {
michael@0:         ErrorBox("Failed to initialize xpcom.");
michael@0:         return -1;
michael@0:       }
michael@0:       
michael@0:       nsCOMPtr<nsIComponentRegistrar> registrar = do_QueryInterface(servMan);
michael@0:       NS_ASSERTION(registrar, "Null nsIComponentRegistrar");
michael@0:       registrar->AutoRegister(nullptr);
michael@0:       
michael@0:       nsCOMPtr<nsINativeApp> nativeAppService(do_GetService(kNativeAppCID, &rv));
michael@0: 
michael@0:       if(NS_FAILED(rv))
michael@0:       {
michael@0:         ErrorBox("Failed to get nativeAppService");
michael@0:         return -1;
michael@0:       }
michael@0:       wndclass.cbSize        = sizeof(wndclass);
michael@0:       wndclass.style         = CS_HREDRAW | CS_VREDRAW;
michael@0:       wndclass.lpfnWndProc   = WndProc;
michael@0:       wndclass.cbClsExtra    = 0;
michael@0:       wndclass.cbWndExtra    = 0;
michael@0:       wndclass.hInstance     = inst;
michael@0:       wndclass.hIcon         = LoadIcon(nullptr, IDI_APPLICATION);
michael@0:       wndclass.hCursor       = LoadCursor(nullptr, IDC_ARROW);
michael@0:       wndclass.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
michael@0:       wndclass.lpszMenuName  = nullptr;
michael@0:       wndclass.lpszClassName = lpszAppName;
michael@0:       wndclass.hIconSm       = LoadIcon(nullptr, IDI_APPLICATION);
michael@0: 
michael@0:       RegisterClassEx(&wndclass) ;
michael@0:       
michael@0:       wnd = CreateWindow(lpszAppName, "The Hello World",
michael@0:                          WS_OVERLAPPEDWINDOW,
michael@0:                          CW_USEDEFAULT, CW_USEDEFAULT,
michael@0:                          CW_USEDEFAULT, CW_USEDEFAULT,
michael@0:                          nullptr, nullptr, inst, nullptr);		     
michael@0:       
michael@0:       ShowWindow(wnd, nShowCmd);
michael@0:       UpdateWindow(wnd);
michael@0:       
michael@0:       nsCOMPtr<nsIEventLoop> eventLoop;
michael@0:       
michael@0:       if(NS_FAILED(nativeAppService->CreateEventLoop(L"_MainLoop", 
michael@0:                                                      nsEventLoopTypes::MainAppLoop, getter_AddRefs(eventLoop))))
michael@0:         {
michael@0:           ErrorBox("Failed to create event Loop");
michael@0:           return 0;
michael@0:         } 
michael@0:       
michael@0:       eventLoop->Run(nullptr, nullptr, nullptr, &retCode);
michael@0:       eventLoop = nullptr; // Clear out before Shutting down XPCOM
michael@0:       
michael@0:       InfoBox("Hello World app is out of loop");
michael@0:     }
michael@0: 	NS_ShutdownXPCOM(nullptr);
michael@0: 	InfoBox("Hello World app is exiting");
michael@0: 	return retCode;
michael@0: }
michael@0: 
michael@0: LRESULT CALLBACK WndProc(HWND wnd, UINT msg, WPARAM wParam, LPARAM lParam)
michael@0: {
michael@0: 	HDC         hdc;
michael@0: 	PAINTSTRUCT ps;
michael@0: 	RECT        rect;
michael@0: 
michael@0: 	switch(msg)
michael@0: 		{
michael@0: 		case WM_PAINT:
michael@0: 			hdc = BeginPaint(wnd, &ps);
michael@0: 
michael@0: 			GetClientRect(wnd, &rect);
michael@0: 
michael@0: 			DrawText(hdc, "Hello, XP Event Loop!", -1, &rect,
michael@0: 					 DT_SINGLELINE | DT_CENTER | DT_VCENTER);
michael@0: 
michael@0: 			EndPaint(wnd, &ps);
michael@0: 			return 0;
michael@0: 
michael@0: 		case WM_DESTROY:
michael@0: 			{
michael@0: 			nsresult rv;
michael@0: 			nsCOMPtr<nsINativeApp> nativeAppService = 
michael@0: 			         do_GetService(kNativeAppCID, &rv);
michael@0: 			if(NS_FAILED(rv))
michael@0: 				{
michael@0: 				ErrorBox("Could not get NativeAppService");
michael@0: 				return 0;
michael@0: 				}
michael@0: 			nsCOMPtr<nsIEventLoop> eventLoop;
michael@0: 
michael@0: 			if(NS_FAILED(nativeAppService->FindEventLoop(L"_MainLoop", 
michael@0: 				getter_AddRefs(eventLoop))))
michael@0: 				{
michael@0: 				ErrorBox("Failed to find event Loop");
michael@0: 				return 0;
michael@0: 				}
michael@0: 			eventLoop->Exit(0);
michael@0: 			}
michael@0: 			return 0;
michael@0: 		}
michael@0: 
michael@0: 	return DefWindowProc(wnd, msg, wParam, lParam);
michael@0: }