314 lines
8.9 KiB
C++
314 lines
8.9 KiB
C++
/* -*- Mode: c++; tab-width: 2; indent-tabs-mode: nil; -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 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 Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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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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*
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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 MPL, 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 MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include "prmon.h"
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#include "plhash.h"
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#include "nsCOMPtr.h"
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#include "nsAppShell.h"
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#include "nsIAppShell.h"
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#include "nsIServiceManager.h"
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#include "nsIEventQueueService.h"
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#include <stdlib.h>
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#include "nsIWidget.h"
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#include "nsCRT.h"
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#include <Pt.h>
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#include <errno.h>
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/* Global Definitions */
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PRBool nsAppShell::gExitMainLoop = PR_FALSE;
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static PLHashTable *sQueueHashTable = nsnull;
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static PLHashTable *sCountHashTable = nsnull;
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// Set our static member
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PRBool nsAppShell::mPtInited = PR_FALSE;
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//-------------------------------------------------------------------------
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//
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// XPCOM CIDs
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//
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//-------------------------------------------------------------------------
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static NS_DEFINE_CID(kEventQueueServiceCID, NS_EVENTQUEUESERVICE_CID);
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//-------------------------------------------------------------------------
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//
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// nsAppShell constructor
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//
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//-------------------------------------------------------------------------
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nsAppShell::nsAppShell()
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{
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mEventQueue = nsnull;
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mFD = -1;
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}
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//-------------------------------------------------------------------------
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//
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// nsAppShell destructor
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//
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//-------------------------------------------------------------------------
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nsAppShell::~nsAppShell()
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{
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if (mFD != -1)
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{
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int err=PtAppRemoveFd(NULL,mFD);
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if (err==-1)
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{
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NS_WARNING("nsAppShell::~EventQueueTokenQueue Run Error calling PtAppRemoveFd");
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#ifdef DEBUG
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printf("nsAppShell::~EventQueueTokenQueue Run Error calling PtAppRemoveFd mFD=<%d> errno=<%d>\n", mFD, errno);
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#endif
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}
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mFD = -1;
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}
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}
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//-------------------------------------------------------------------------
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//
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// nsISupports implementation macro
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//
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//-------------------------------------------------------------------------
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NS_IMPL_ISUPPORTS1(nsAppShell, nsIAppShell)
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//-------------------------------------------------------------------------
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//
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// Enter a message handler loop
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//
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//-------------------------------------------------------------------------
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static int event_processor_callback(int fd, void *data, unsigned mode)
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{
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nsIEventQueue *eventQueue = (nsIEventQueue*)data;
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PtHold();
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if (eventQueue)
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eventQueue->ProcessPendingEvents();
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PtRelease();
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return Pt_CONTINUE;
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}
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//-------------------------------------------------------------------------
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//
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// Create the application shell
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//
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//-------------------------------------------------------------------------
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NS_IMETHODIMP nsAppShell::Create(int *bac, char **bav)
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{
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/*
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This used to be done in the init function of nsToolkit. It was moved here because the phoenix
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browser may ( when -ProfileManager is used ) create/ListenToEventQueue of an nsAppShell before
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the toolkit is initialized and ListenToEventQueue relies on the Pt being already initialized
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*/
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if( !mPtInited )
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{
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PtInit( NULL );
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PtChannelCreate(); // Force use of pulses
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mPtInited = PR_TRUE;
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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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// Spinup - do any preparation necessary for running a message loop
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//
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//-------------------------------------------------------------------------
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NS_METHOD nsAppShell::Spinup()
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{
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nsresult rv = NS_OK;
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// Get the event queue service
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nsCOMPtr<nsIEventQueueService> eventQService = do_GetService(kEventQueueServiceCID, &rv);
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if (NS_FAILED(rv)) {
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NS_ASSERTION("Could not obtain event queue service", PR_FALSE);
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return rv;
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}
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//Get the event queue for the thread.
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rv = eventQService->GetThreadEventQueue(NS_CURRENT_THREAD, getter_AddRefs(mEventQueue));
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// If we got an event queue, use it.
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if (mEventQueue)
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goto done;
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// otherwise create a new event queue for the thread
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rv = eventQService->CreateThreadEventQueue();
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if (NS_FAILED(rv)) {
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NS_ASSERTION("Could not create the thread event queue", PR_FALSE);
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return rv;
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}
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// Ask again nicely for the event queue now that we have created one.
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rv = eventQService->GetThreadEventQueue(NS_CURRENT_THREAD, getter_AddRefs(mEventQueue));
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// XXX shouldn't this be automatic?
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done:
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ListenToEventQueue(mEventQueue, PR_TRUE);
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return rv;
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}
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//-------------------------------------------------------------------------
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//
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// Spindown - do any cleanup necessary for finishing a message loop
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//
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//-------------------------------------------------------------------------
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NS_METHOD nsAppShell::Spindown()
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{
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if (mEventQueue) {
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ListenToEventQueue(mEventQueue, PR_FALSE);
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mEventQueue->ProcessPendingEvents();
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mEventQueue = nsnull;
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}
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return NS_OK;
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}
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/* This routine replaces the standard PtMainLoop() for Photon */
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/* We had to replace it to provide a mechanism (ExitMainLoop) to exit */
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/* the loop. */
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void MyMainLoop( void )
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{
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nsAppShell::gExitMainLoop = PR_FALSE;
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while (! nsAppShell::gExitMainLoop)
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{
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PtProcessEvent();
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}
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#ifdef DEBUG
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printf("nsAppShell: MyMainLoop exiting!\n");
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#endif
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}
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//-------------------------------------------------------------------------
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//
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// Run
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//
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//-------------------------------------------------------------------------
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NS_IMETHODIMP nsAppShell::Run()
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{
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if (!mEventQueue)
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Spinup();
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if (!mEventQueue)
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return NS_ERROR_NOT_INITIALIZED;
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// kick up gtk_main. this won't return until gtk_main_quit is called
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MyMainLoop();
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Spindown();
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return NS_OK;
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}
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//-------------------------------------------------------------------------
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//
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// Exit a message handler loop
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//
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//-------------------------------------------------------------------------
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NS_METHOD nsAppShell::Exit()
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{
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gExitMainLoop = PR_TRUE;
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return NS_OK;
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}
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#define NUMBER_HASH_KEY(_num) ((PLHashNumber) _num)
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static PLHashNumber
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IntHashKey(PRInt32 key)
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{
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return NUMBER_HASH_KEY(key);
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}
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NS_IMETHODIMP nsAppShell::ListenToEventQueue(nsIEventQueue *aQueue,
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PRBool aListen)
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{
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if (!sQueueHashTable) {
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sQueueHashTable = PL_NewHashTable(3, (PLHashFunction)IntHashKey,
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PL_CompareValues, PL_CompareValues, 0, 0);
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}
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if (!sCountHashTable) {
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sCountHashTable = PL_NewHashTable(3, (PLHashFunction)IntHashKey,
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PL_CompareValues, PL_CompareValues, 0, 0);
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}
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if (aListen) {
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/* add listener */
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PRInt32 key = aQueue->GetEventQueueSelectFD();
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/* only add if we arn't already in the table */
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if (!PL_HashTableLookup(sQueueHashTable, (void *)(key))) {
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PRInt32 tag = PtAppAddFd( NULL, aQueue->GetEventQueueSelectFD(), (Pt_FD_READ | Pt_FD_NOPOLL | Pt_FD_DRAIN ),
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event_processor_callback, aQueue );
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if (tag >= 0) {
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PL_HashTableAdd(sQueueHashTable, (void *)(key), (void *)(key));
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}
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}
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/* bump up the count */
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int count = (int)(PL_HashTableLookup(sCountHashTable, (void *)(key)));
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PL_HashTableAdd(sCountHashTable, (void *)(key), (void *)(count+1));
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} else {
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/* remove listener */
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PRInt32 key = aQueue->GetEventQueueSelectFD();
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int count = (int)(PL_HashTableLookup(sCountHashTable, (void *)(key)));
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if (count - 1 == 0) {
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int tag = (int)(PL_HashTableLookup(sQueueHashTable, (void *)(key)));
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if (tag > 0) {
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PtAppRemoveFd(NULL, key);
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PL_HashTableRemove(sQueueHashTable, (void *)(key));
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}
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}
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PL_HashTableAdd(sCountHashTable, (void *)(key), (void *)(count-1));
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}
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return NS_OK;
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}
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