316 lines
9.1 KiB
C++
316 lines
9.1 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: NPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Netscape Public License
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* Version 1.1 (the "License"); you may not use this file except in
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* compliance with the License. You may obtain a copy of the License at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* John Fairhurst <john_fairhurst@iname.com>
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* Pierre Phaneuf <pp@ludusdesign.com>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the NPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the NPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include "nsToolkit.h"
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#include "nsSwitchToUIThread.h"
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NS_IMPL_ISUPPORTS1(nsToolkit, nsIToolkit)
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//
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// Static thread local storage index of the Toolkit
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// object associated with a given thread...
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//
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static PRUintn gToolkitTLSIndex = 0;
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//
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// main for the message pump thread
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//
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PRBool gThreadState = PR_FALSE;
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struct ThreadInitInfo {
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PRMonitor *monitor;
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nsToolkit *toolkit;
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};
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void PR_CALLBACK RunPump(void* arg)
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{
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ThreadInitInfo *info = (ThreadInitInfo*)arg;
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::PR_EnterMonitor(info->monitor);
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// do registration and creation in this thread
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info->toolkit->CreateInternalWindow(PR_GetCurrentThread());
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gThreadState = PR_TRUE;
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::PR_Notify(info->monitor);
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::PR_ExitMonitor(info->monitor);
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delete info;
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// Process messages
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QMSG qmsg;
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while (WinGetMsg((HAB)0, &qmsg, 0, 0, 0)) {
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WinDispatchMsg((HAB)0, &qmsg);
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}
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}
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//-------------------------------------------------------------------------
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//
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// constructor
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//
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//-------------------------------------------------------------------------
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nsToolkit::nsToolkit()
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{
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mGuiThread = NULL;
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mDispatchWnd = 0;
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mMonitor = PR_NewMonitor();
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}
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//-------------------------------------------------------------------------
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//
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// destructor
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//
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//-------------------------------------------------------------------------
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nsToolkit::~nsToolkit()
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{
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NS_PRECONDITION(::WinIsWindow((HAB)0, mDispatchWnd), "Invalid window handle");
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// Destroy the Dispatch Window
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::WinDestroyWindow(mDispatchWnd);
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mDispatchWnd = NULL;
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// Remove the TLS reference to the toolkit...
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PR_SetThreadPrivate(gToolkitTLSIndex, nsnull);
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PR_DestroyMonitor( mMonitor);
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}
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//-------------------------------------------------------------------------
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//
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// Register the window class for the internal window and create the window
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//
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//-------------------------------------------------------------------------
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void nsToolkit::CreateInternalWindow(PRThread *aThread)
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{
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NS_PRECONDITION(aThread, "null thread");
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mGuiThread = aThread;
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//
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// create the internal window
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//
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WinRegisterClass((HAB)0, "nsToolkitClass", nsToolkitWindowProc, NULL, 0);
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mDispatchWnd = ::WinCreateWindow(HWND_DESKTOP,
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"nsToolkitClass",
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"NetscapeDispatchWnd",
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WS_DISABLED,
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-50, -50,
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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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VERIFY(mDispatchWnd);
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}
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//-------------------------------------------------------------------------
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//
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// Create a new thread and run the message pump in there
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//
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//-------------------------------------------------------------------------
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void nsToolkit::CreateUIThread()
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{
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PRMonitor *monitor = ::PR_NewMonitor();
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::PR_EnterMonitor(monitor);
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ThreadInitInfo *ti = new ThreadInitInfo();
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ti->monitor = monitor;
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ti->toolkit = this;
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// create a gui thread
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mGuiThread = ::PR_CreateThread(PR_SYSTEM_THREAD,
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RunPump,
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(void*)ti,
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PR_PRIORITY_NORMAL,
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PR_LOCAL_THREAD,
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PR_UNJOINABLE_THREAD,
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0);
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// wait for the gui thread to start
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while(gThreadState == PR_FALSE) {
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::PR_Wait(monitor, PR_INTERVAL_NO_TIMEOUT);
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}
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// at this point the thread is running
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::PR_ExitMonitor(monitor);
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::PR_DestroyMonitor(monitor);
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}
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//-------------------------------------------------------------------------
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//
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//
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//-------------------------------------------------------------------------
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NS_METHOD nsToolkit::Init(PRThread *aThread)
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{
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// Store the thread ID of the thread containing the message pump.
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// If no thread is provided create one
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if (NULL != aThread) {
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CreateInternalWindow(aThread);
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} else {
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// create a thread where the message pump will run
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CreateUIThread();
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}
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return NS_OK;
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}
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//-------------------------------------------------------------------------
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//
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// nsToolkit WindowProc. Used to call methods on the "main GUI thread"...
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//
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//-------------------------------------------------------------------------
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MRESULT EXPENTRY nsToolkitWindowProc(HWND hWnd, ULONG msg, MPARAM mp1,
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MPARAM mp2)
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{
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switch (msg) {
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case WM_CALLMETHOD:
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{
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MethodInfo *info = (MethodInfo *)mp2;
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PRMonitor *monitor = (PRMonitor *)mp1;
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info->Invoke();
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PR_EnterMonitor(monitor);
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PR_Notify(monitor);
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PR_ExitMonitor(monitor);
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break;
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}
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case WM_SENDMSG:
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{
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SendMsgStruct *pData = (SendMsgStruct*) mp1;
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// send the message
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pData->rc = WinSendMsg( pData->hwnd, pData->msg, pData->mp1, pData->mp2);
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// signal the monitor to let the caller continue
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PR_EnterMonitor( pData->pMonitor);
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PR_Notify( pData->pMonitor);
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PR_ExitMonitor( pData->pMonitor);
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break;
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}
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default:
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return ::WinDefWindowProc(hWnd, msg, mp1, mp2);
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}
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}
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//-------------------------------------------------------------------------
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//
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// Return the nsIToolkit for the current thread. If a toolkit does not
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// yet exist, then one will be created...
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//
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//-------------------------------------------------------------------------
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NS_METHOD NS_GetCurrentToolkit(nsIToolkit* *aResult)
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{
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nsIToolkit* toolkit = nsnull;
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nsresult rv = NS_OK;
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PRStatus status;
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// Create the TLS index the first time through...
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if (0 == gToolkitTLSIndex) {
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status = PR_NewThreadPrivateIndex(&gToolkitTLSIndex, NULL);
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if (PR_FAILURE == status) {
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rv = NS_ERROR_FAILURE;
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}
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}
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if (NS_SUCCEEDED(rv)) {
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toolkit = (nsIToolkit*)PR_GetThreadPrivate(gToolkitTLSIndex);
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//
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// Create a new toolkit for this thread...
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//
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if (!toolkit) {
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toolkit = new nsToolkit();
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if (!toolkit) {
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rv = NS_ERROR_OUT_OF_MEMORY;
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} else {
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NS_ADDREF(toolkit);
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toolkit->Init(PR_GetCurrentThread());
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//
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// The reference stored in the TLS is weak. It is removed in the
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// nsToolkit destructor...
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//
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PR_SetThreadPrivate(gToolkitTLSIndex, (void*)toolkit);
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}
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} else {
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NS_ADDREF(toolkit);
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}
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*aResult = toolkit;
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}
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return rv;
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}
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void nsToolkit::CallMethod(MethodInfo *info)
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{
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PR_EnterMonitor(mMonitor);
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::WinPostMsg(mDispatchWnd, WM_CALLMETHOD, MPFROMP(mMonitor), MPFROMP(info));
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PR_Wait(mMonitor, PR_INTERVAL_NO_TIMEOUT);
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PR_ExitMonitor( mMonitor);
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}
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MRESULT nsToolkit::SendMsg( HWND hwnd, ULONG msg, MPARAM mp1, MPARAM mp2)
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{
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MRESULT rc = 0;
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if( hwnd && IsGuiThread())
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rc = WinSendMsg( hwnd, msg, mp1, mp2);
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else if( hwnd)
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{
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PR_EnterMonitor( mMonitor);
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SendMsgStruct data( hwnd, msg, mp1, mp2, mMonitor);
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// post a message to the window
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WinPostMsg( mDispatchWnd, WM_SENDMSG, MPFROMP(&data), 0);
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// wait for it to complete...
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PR_Wait( mMonitor, PR_INTERVAL_NO_TIMEOUT);
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PR_ExitMonitor( mMonitor);
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rc = data.rc;
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}
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return rc;
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}
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