gecko-dev/widget/os2/nsAppShell.cpp
Birunthan Mohanathas e77ee4df1a Bug 784739 - Switch from NULL to nullptr in widget/os2/; r=ehsan
--HG--
extra : rebase_source : c6afd8bd171364431280c8e69f406e36ebc5b523
2013-10-08 14:47:49 -04:00

101 lines
3.0 KiB
C++

/* -*- Mode: c++; tab-width: 2; indent-tabs-mode: nil; -*- */
/* 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 "nsAppShell.h"
#include "nsThreadUtils.h"
static UINT sMsgId;
//-------------------------------------------------------------------------
MRESULT EXPENTRY EventWindowProc(HWND hwnd, ULONG msg, MPARAM mp1, MPARAM mp2)
{
if (msg == sMsgId) {
nsAppShell *as = reinterpret_cast<nsAppShell *>(mp2);
as->NativeEventCallback();
NS_RELEASE(as);
return (MRESULT)TRUE;
}
return WinDefWindowProc(hwnd, msg, mp1, mp2);
}
nsAppShell::~nsAppShell()
{
if (mEventWnd) {
// DestroyWindow doesn't do anything when called from a non UI thread.
// Since mEventWnd was created on the UI thread, it must be destroyed on
// the UI thread.
WinSendMsg(mEventWnd, WM_CLOSE, 0, 0);
}
}
nsresult
nsAppShell::Init()
{
// a message queue is required to create a window but
// it is not necessarily created yet
if (WinQueryQueueInfo(HMQ_CURRENT, nullptr, 0) == FALSE) {
// Set our app to be a PM app before attempting Win calls
PPIB ppib;
PTIB ptib;
DosGetInfoBlocks(&ptib, &ppib);
ppib->pib_ultype = 3;
HAB hab = WinInitialize(0);
WinCreateMsgQueue(hab, 0);
}
if (!sMsgId) {
sMsgId = WinAddAtom( WinQuerySystemAtomTable(), "nsAppShell:EventID");
WinRegisterClass((HAB)0, "nsAppShell:EventWindowClass", EventWindowProc,
nullptr, 0);
}
mEventWnd = ::WinCreateWindow(HWND_DESKTOP,
"nsAppShell:EventWindowClass",
"nsAppShell:EventWindow",
0,
0, 0,
10, 10,
HWND_DESKTOP,
HWND_BOTTOM,
0, 0, 0);
NS_ENSURE_STATE(mEventWnd);
return nsBaseAppShell::Init();
}
void
nsAppShell::ScheduleNativeEventCallback()
{
// post a message to the native event queue...
NS_ADDREF_THIS();
WinPostMsg(mEventWnd, sMsgId, 0, reinterpret_cast<MPARAM>(this));
}
bool
nsAppShell::ProcessNextNativeEvent(bool mayWait)
{
bool gotMessage = false;
do {
QMSG qmsg;
// Give priority to system messages (in particular keyboard, mouse, timer,
// and paint messages).
if (WinPeekMsg((HAB)0, &qmsg, nullptr, WM_CHAR, WM_VIOCHAR, PM_REMOVE) ||
WinPeekMsg((HAB)0, &qmsg, nullptr, WM_MOUSEFIRST, WM_MOUSELAST, PM_REMOVE) ||
WinPeekMsg((HAB)0, &qmsg, nullptr, 0, WM_USER-1, PM_REMOVE) ||
WinPeekMsg((HAB)0, &qmsg, nullptr, 0, 0, PM_REMOVE)) {
gotMessage = true;
::WinDispatchMsg((HAB)0, &qmsg);
} else if (mayWait) {
// Block and wait for any posted application message
::WinWaitMsg((HAB)0, 0, 0);
}
} while (!gotMessage && mayWait);
return gotMessage;
}