mirror of
https://github.com/mozilla/gecko-dev.git
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101 lines
3.0 KiB
C++
101 lines
3.0 KiB
C++
/* -*- Mode: c++; tab-width: 2; indent-tabs-mode: nil; -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "nsAppShell.h"
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#include "nsThreadUtils.h"
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static UINT sMsgId;
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//-------------------------------------------------------------------------
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MRESULT EXPENTRY EventWindowProc(HWND hwnd, ULONG msg, MPARAM mp1, MPARAM mp2)
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{
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if (msg == sMsgId) {
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nsAppShell *as = reinterpret_cast<nsAppShell *>(mp2);
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as->NativeEventCallback();
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NS_RELEASE(as);
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return (MRESULT)TRUE;
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}
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return WinDefWindowProc(hwnd, msg, mp1, mp2);
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}
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nsAppShell::~nsAppShell()
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{
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if (mEventWnd) {
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// DestroyWindow doesn't do anything when called from a non UI thread.
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// Since mEventWnd was created on the UI thread, it must be destroyed on
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// the UI thread.
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WinSendMsg(mEventWnd, WM_CLOSE, 0, 0);
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}
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}
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nsresult
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nsAppShell::Init()
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{
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// a message queue is required to create a window but
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// it is not necessarily created yet
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if (WinQueryQueueInfo(HMQ_CURRENT, nullptr, 0) == FALSE) {
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// Set our app to be a PM app before attempting Win calls
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PPIB ppib;
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PTIB ptib;
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DosGetInfoBlocks(&ptib, &ppib);
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ppib->pib_ultype = 3;
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HAB hab = WinInitialize(0);
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WinCreateMsgQueue(hab, 0);
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}
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if (!sMsgId) {
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sMsgId = WinAddAtom( WinQuerySystemAtomTable(), "nsAppShell:EventID");
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WinRegisterClass((HAB)0, "nsAppShell:EventWindowClass", EventWindowProc,
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nullptr, 0);
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}
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mEventWnd = ::WinCreateWindow(HWND_DESKTOP,
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"nsAppShell:EventWindowClass",
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"nsAppShell:EventWindow",
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0,
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0, 0,
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10, 10,
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HWND_DESKTOP,
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HWND_BOTTOM,
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0, 0, 0);
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NS_ENSURE_STATE(mEventWnd);
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return nsBaseAppShell::Init();
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}
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void
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nsAppShell::ScheduleNativeEventCallback()
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{
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// post a message to the native event queue...
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NS_ADDREF_THIS();
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WinPostMsg(mEventWnd, sMsgId, 0, reinterpret_cast<MPARAM>(this));
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}
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bool
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nsAppShell::ProcessNextNativeEvent(bool mayWait)
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{
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bool gotMessage = false;
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do {
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QMSG qmsg;
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// Give priority to system messages (in particular keyboard, mouse, timer,
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// and paint messages).
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if (WinPeekMsg((HAB)0, &qmsg, nullptr, WM_CHAR, WM_VIOCHAR, PM_REMOVE) ||
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WinPeekMsg((HAB)0, &qmsg, nullptr, WM_MOUSEFIRST, WM_MOUSELAST, PM_REMOVE) ||
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WinPeekMsg((HAB)0, &qmsg, nullptr, 0, WM_USER-1, PM_REMOVE) ||
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WinPeekMsg((HAB)0, &qmsg, nullptr, 0, 0, PM_REMOVE)) {
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gotMessage = true;
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::WinDispatchMsg((HAB)0, &qmsg);
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} else if (mayWait) {
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// Block and wait for any posted application message
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::WinWaitMsg((HAB)0, 0, 0);
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}
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} while (!gotMessage && mayWait);
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return gotMessage;
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}
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