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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#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(nullptr, text, "XP Event Loop", MB_OK | MB_ICONSTOP);
}
void InfoBox(LPSTR text)
{
MessageBox(nullptr, 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), nullptr, nullptr);
if(NS_FAILED(rv))
{
ErrorBox("Failed to initialize xpcom.");
return -1;
}
nsCOMPtr<nsIComponentRegistrar> registrar = do_QueryInterface(servMan);
NS_ASSERTION(registrar, "Null nsIComponentRegistrar");
registrar->AutoRegister(nullptr);
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(nullptr, IDI_APPLICATION);
wndclass.hCursor = LoadCursor(nullptr, IDC_ARROW);
wndclass.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
wndclass.lpszMenuName = nullptr;
wndclass.lpszClassName = lpszAppName;
wndclass.hIconSm = LoadIcon(nullptr, IDI_APPLICATION);
RegisterClassEx(&wndclass) ;
wnd = CreateWindow(lpszAppName, "The Hello World",
WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT, CW_USEDEFAULT,
CW_USEDEFAULT, CW_USEDEFAULT,
nullptr, nullptr, inst, nullptr);
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(nullptr, nullptr, nullptr, &retCode);
eventLoop = nullptr; // Clear out before Shutting down XPCOM
InfoBox("Hello World app is out of loop");
}
NS_ShutdownXPCOM(nullptr);
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);
}
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