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beard%netscape.com 1999-03-19 18:21:50 +00:00
parent c2b706b307
commit 5c7d48dd05
2 changed files with 103 additions and 0 deletions
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67
plugin/oji/MRJ/plugin/Source/jGNE.cpp Normal file
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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All Rights
* Reserved.
*/
/*
jGNE.cpp
Provides a generalized jGNE filtering service.
by Patrick C. Beard.
*/
#include "jGNE.h"
#include <MixedMode.h>
#include <LowMem.h>
static void GNEFilter(EventRecord *event, Boolean* result);
static RoutineDescriptor theGNEFilterUPP = BUILD_ROUTINE_DESCRIPTOR(uppGetNextEventFilterProcInfo, GNEFilter);
static GetNextEventFilterUPP theGetNextEventFilterUPP = NULL;
static EventFilterProcPtr theEventFilter = NULL;
OSStatus InstallEventFilter(EventFilterProcPtr filter)
{
theEventFilter = filter;
// get previous event filter routine.
theGetNextEventFilterUPP = LMGetGNEFilter();
LMSetGNEFilter(&theGNEFilterUPP);
return noErr;
}
OSStatus RemoveEventFilter()
{
// should really check to see if somebody else has installed a filter proc as well.
LMSetGNEFilter(theGetNextEventFilterUPP);
theGetNextEventFilterUPP = NULL;
theEventFilter = NULL;
return noErr;
}
static void GNEFilter(EventRecord *event, Boolean* result)
{
// call next filter in chain first.
if (theGetNextEventFilterUPP)
CallGetNextEventFilterProc(theGetNextEventFilterUPP, event, result);
// now, let the filter proc have a crack at the event.
if (*result)
*result = !theEventFilter(event);
}

36
plugin/oji/MRJ/plugin/Source/jGNE.h Normal file
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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All Rights
* Reserved.
*/
#pragma once
/*
jGNE.h
Provides a generalized jGNE filtering service.
by Patrick C. Beard.
*/
#ifndef __EVENTS__
#include <Events.h>
#endif
typedef Boolean (*EventFilterProcPtr) (EventRecord* event);
OSStatus InstallEventFilter(EventFilterProcPtr filter);
OSStatus RemoveEventFilter();