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/*******************************************************************************
* Copyright (c) 2000, 2017 IBM Corporation and others.
*
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.swt.ole.win32;
import org.eclipse.swt.*;
import org.eclipse.swt.internal.*;
import org.eclipse.swt.internal.ole.win32.*;
import org.eclipse.swt.internal.win32.*;
final class OlePropertyChangeSink {
private OleControlSite controlSite;
//private IUnknown objIUnknown;
private COMObject iUnknown;
private COMObject iPropertyNotifySink;
private int refCount;
private int propertyCookie;
private OleEventTable eventTable;
OlePropertyChangeSink(OleControlSite controlSite) {
this.controlSite = controlSite;
createCOMInterfaces();
}
void addListener(int propertyID, OleListener listener) {
if (listener == null) OLE.error (SWT.ERROR_NULL_ARGUMENT);
if (eventTable == null) eventTable = new OleEventTable ();
eventTable.hook(propertyID, listener);
}
int AddRef() {
refCount++;
return refCount;
}
void connect(IUnknown objIUnknown) {
// Set up property change notification sink
long /*int*/[] ppvObject = new long /*int*/[1];
if (objIUnknown.QueryInterface(COM.IIDIConnectionPointContainer, ppvObject) == COM.S_OK) {
IConnectionPointContainer cpc = new IConnectionPointContainer(ppvObject[0]);
if (cpc.FindConnectionPoint(COM.IIDIPropertyNotifySink, ppvObject) == COM.S_OK) {
IConnectionPoint cp = new IConnectionPoint(ppvObject[0]);
int[] cookie = new int[1];
if (cp.Advise(iPropertyNotifySink.getAddress(), cookie) == COM.S_OK) {
propertyCookie = cookie[0];
}
cp.Release();
}
cpc.Release();
}
}
private void createCOMInterfaces() {
// register each of the interfaces that this object implements
iUnknown = new COMObject(new int[]{2, 0, 0}){
@Override
public long /*int*/ method0(long /*int*/[] args) {return QueryInterface(args[0], args[1]);}
@Override
public long /*int*/ method1(long /*int*/[] args) {return AddRef();}
@Override
public long /*int*/ method2(long /*int*/[] args) {return Release();}
};
iPropertyNotifySink = new COMObject(new int[]{2, 0, 0, 1, 1}){
@Override
public long /*int*/ method0(long /*int*/[] args) {return QueryInterface(args[0], args[1]);}
@Override
public long /*int*/ method1(long /*int*/[] args) {return AddRef();}
@Override
public long /*int*/ method2(long /*int*/[] args) {return Release();}
@Override
public long /*int*/ method3(long /*int*/[] args) {return OnChanged((int)/*64*/args[0]);}
@Override
public long /*int*/ method4(long /*int*/[] args) {return OnRequestEdit((int)/*64*/args[0]);}
};
}
void disconnect(IUnknown objIUnknown) {
// disconnect property notification sink
if (propertyCookie != 0 && objIUnknown != null) {
long /*int*/[] ppvObject = new long /*int*/[1];
if (objIUnknown.QueryInterface(COM.IIDIConnectionPointContainer, ppvObject) == COM.S_OK) {
IConnectionPointContainer cpc = new IConnectionPointContainer(ppvObject[0]);
if (cpc.FindConnectionPoint(COM.IIDIPropertyNotifySink, ppvObject) == COM.S_OK) {
IConnectionPoint cp = new IConnectionPoint(ppvObject[0]);
if (cp.Unadvise(propertyCookie) == COM.S_OK) {
propertyCookie = 0;
}
cp.Release();
}
cpc.Release();
}
}
}
private void disposeCOMInterfaces() {
if (iUnknown != null) iUnknown.dispose();
iUnknown = null;
if (iPropertyNotifySink != null) iPropertyNotifySink.dispose();
iPropertyNotifySink = null;
}
/**
* Notify listeners of an event.
* <p>
* This method notifies all listeners that an event
* has occurred.
*
* @param eventType the desired SWT event
* @param event the event data
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT when handler is null</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_THREAD_INVALID_ACCESS when called from the wrong thread</li>
* <li>ERROR_WIDGET_DISPOSED when the widget has been disposed</li>
* </ul>
*/
private void notifyListener (int eventType, OleEvent event) {
if (event == null) OLE.error (SWT.ERROR_NULL_ARGUMENT);
if (eventTable == null) return;
event.type = eventType;
event.widget = controlSite;
eventTable.sendEvent (event);
}
private int OnChanged(int dispID) {
if (eventTable == null || !eventTable.hooks(dispID)) return COM.S_OK;
OleEvent event = new OleEvent();
event.detail = OLE.PROPERTY_CHANGED;
notifyListener(dispID,event);
return COM.S_OK;
}
private int OnRequestEdit(int dispID) {
if (eventTable == null || !eventTable.hooks(dispID)) return COM.S_OK;
OleEvent event = new OleEvent();
event.doit = true;
event.detail = OLE.PROPERTY_CHANGING;
notifyListener(dispID,event);
return (event.doit) ? COM.S_OK : COM.S_FALSE;
}
private int QueryInterface(long /*int*/ riid, long /*int*/ ppvObject) {
if (riid == 0 || ppvObject == 0)
return COM.E_INVALIDARG;
GUID guid = new GUID();
COM.MoveMemory(guid, riid, GUID.sizeof);
if (COM.IsEqualGUID(guid, COM.IIDIUnknown)) {
OS.MoveMemory(ppvObject, new long /*int*/[] {iUnknown.getAddress()}, C.PTR_SIZEOF);
AddRef();
return COM.S_OK;
}
if (COM.IsEqualGUID(guid, COM.IIDIPropertyNotifySink)) {
OS.MoveMemory(ppvObject, new long /*int*/[] {iPropertyNotifySink.getAddress()}, C.PTR_SIZEOF);
AddRef();
return COM.S_OK;
}
OS.MoveMemory(ppvObject, new long /*int*/[] {0}, C.PTR_SIZEOF);
return COM.E_NOINTERFACE;
}
int Release() {
refCount--;
if (refCount == 0) {
disposeCOMInterfaces();
}
return refCount;
}
void removeListener(int propertyID, OleListener listener) {
if (listener == null) OLE.error (SWT.ERROR_NULL_ARGUMENT);
if (eventTable == null) return;
eventTable.unhook (propertyID, listener);
}
}
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