gecko-dev/widget/os2/nsAppShell.cpp

134 строки
4.5 KiB
C++

/* -*- Mode: c++; tab-width: 2; indent-tabs-mode: nil; -*- */
/* ***** 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.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* IBM Corporation.
* Portions created by the Initial Developer are Copyright (C) 2003
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Michael Lowe <michael.lowe@bigfoot.com>
* John Fairhurst <john_fairhurst@iname.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either 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"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#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, NULL, 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, NULL, 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, NULL, WM_CHAR, WM_VIOCHAR, PM_REMOVE) ||
WinPeekMsg((HAB)0, &qmsg, NULL, WM_MOUSEFIRST, WM_MOUSELAST, PM_REMOVE) ||
WinPeekMsg((HAB)0, &qmsg, NULL, 0, WM_USER-1, PM_REMOVE) ||
WinPeekMsg((HAB)0, &qmsg, NULL, 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;
}