tests/windows/TestHelloXPLoop.cpp

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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 * ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
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 * The Original Code is the Mozilla browser.
 *
 * The Initial Developer of the Original Code is
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 * Portions created by the Initial Developer are Copyright (C) 1999
 * the Initial Developer. All Rights Reserved.
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 * Contributor(s):
 *   Travis Bogard <travis@netscape.com>
 *
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 * either of the GNU General Public License Version 2 or later (the "GPL"),
 * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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#include "nsIServiceManager.h"
#include "nsCOMPtr.h"
#include "nsCNativeApp.h"
#include "nsIEventLoop.h"
#include <windows.h>

static NS_DEFINE_CID(kNativeAppCID, NS_NATIVE_APP_CID);

LRESULT CALLBACK WndProc(HWND wnd, UINT msg, WPARAM wParam, LPARAM lParam);

void ErrorBox(LPSTR text)
{
    MessageBox(NULL, text, "XP Event Loop", MB_OK | MB_ICONSTOP);
}

void InfoBox(LPSTR text)
{
    MessageBox(NULL, text, "XP Event Loop", MB_OK | MB_ICONINFORMATION);
}

int WINAPI WinMain(HINSTANCE inst,
                   HINSTANCE prevInstance,
                   LPSTR lpszCmdLine,
                   int nShowCmd)
{
    char* lpszAppName = "HelloWorld";
    HWND wnd;
    WNDCLASSEX wndclass;
    int retCode;

    {   //  Needed to scope all nsCOMPtr within XPCOM Init and Shutdown
      nsresult rv;
      nsCOMPtr<nsIServiceManager> servMan;
      rv = NS_InitXPCOM2(getter_AddRefs(servMan), nsnull, nsnull);
      if(NS_FAILED(rv))
      {
        ErrorBox("Failed to initalize xpcom.");
        return -1;
      }

      nsCOMPtr<nsIComponentRegistrar> registrar = do_QueryInterface(servMan);
      NS_ASSERTION(registrar, "Null nsIComponentRegistrar");
      registrar->AutoRegister(nsnull);

      nsCOMPtr<nsINativeApp> nativeAppService(do_GetService(kNativeAppCID, &rv));

      if(NS_FAILED(rv))
      {
        ErrorBox("Failed to get nativeAppService");
        return -1;
      }
      wndclass.cbSize        = sizeof(wndclass);
      wndclass.style         = CS_HREDRAW | CS_VREDRAW;
      wndclass.lpfnWndProc   = WndProc;
      wndclass.cbClsExtra    = 0;
      wndclass.cbWndExtra    = 0;
      wndclass.hInstance     = inst;
      wndclass.hIcon         = LoadIcon(NULL, IDI_APPLICATION);
      wndclass.hCursor       = LoadCursor(NULL, IDC_ARROW);
      wndclass.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
      wndclass.lpszMenuName  = NULL;
      wndclass.lpszClassName = lpszAppName;
      wndclass.hIconSm       = LoadIcon(NULL, IDI_APPLICATION);

      RegisterClassEx(&wndclass) ;

      wnd = CreateWindow(lpszAppName, "The Hello World",
                         WS_OVERLAPPEDWINDOW,
                         CW_USEDEFAULT, CW_USEDEFAULT,
                         CW_USEDEFAULT, CW_USEDEFAULT,
                         NULL, NULL, inst, NULL);

      ShowWindow(wnd, nShowCmd);
      UpdateWindow(wnd);

      nsCOMPtr<nsIEventLoop> eventLoop;

      if(NS_FAILED(nativeAppService->CreateEventLoop(L"_MainLoop",
                                                     nsEventLoopTypes::MainAppLoop, getter_AddRefs(eventLoop))))
        {
          ErrorBox("Failed to create event Loop");
          return 0;
        }

      eventLoop->Run(nsnull, nsnull, nsnull, &retCode);
      eventLoop = nsnull; // Clear out before Shutting down XPCOM

      InfoBox("Hello World app is out of loop");
    }
    NS_ShutdownXPCOM(nsnull);
    InfoBox("Hello World app is exiting");
    return retCode;
}

LRESULT CALLBACK WndProc(HWND wnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
    HDC         hdc;
    PAINTSTRUCT ps;
    RECT        rect;

    switch(msg)
        {
        case WM_PAINT:
            hdc = BeginPaint(wnd, &ps);

            GetClientRect(wnd, &rect);

            DrawText(hdc, "Hello, XP Event Loop!", -1, &rect,
                     DT_SINGLELINE | DT_CENTER | DT_VCENTER);

            EndPaint(wnd, &ps);
            return 0;

        case WM_DESTROY:
            {
            nsresult rv;
            nsCOMPtr<nsINativeApp> nativeAppService =
                     do_GetService(kNativeAppCID, &rv);
            if(NS_FAILED(rv))
                {
                ErrorBox("Could not get NativeAppService");
                return 0;
                }
            nsCOMPtr<nsIEventLoop> eventLoop;

            if(NS_FAILED(nativeAppService->FindEventLoop(L"_MainLoop",
                getter_AddRefs(eventLoop))))
                {
                ErrorBox("Failed to find event Loop");
                return 0;
                }
            eventLoop->Exit(0);
            }
            return 0;
        }

    return DefWindowProc(wnd, msg, wParam, lParam);
}