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/*******************************************************************************
* Copyright (c) 2000, 2007 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.swt.ole.win32;
import org.eclipse.swt.*;
import org.eclipse.swt.internal.win32.*;
import org.eclipse.swt.internal.ole.win32.*;
final class OleEventSink
{
private OleControlSite widget;
private COMObject iDispatch;
private int refCount;
private IUnknown objIUnknown;
private int eventCookie;
private GUID eventGuid;
private OleEventTable eventTable;
OleEventSink(OleControlSite widget, int /*long*/ iUnknown, GUID riid) {
this.widget = widget;
this.eventGuid = riid;
this.objIUnknown = new IUnknown(iUnknown);
createCOMInterfaces();
}
void connect () {
int /*long*/[] ppvObject = new int /*long*/[1];
if (objIUnknown.QueryInterface(COM.IIDIConnectionPointContainer, ppvObject) == COM.S_OK) {
IConnectionPointContainer cpc = new IConnectionPointContainer(ppvObject[0]);
int /*long*/[] ppCP = new int /*long*/[1];
if (cpc.FindConnectionPoint(eventGuid, ppCP) == COM.S_OK) {
IConnectionPoint cp = new IConnectionPoint(ppCP[0]);
int[] pCookie = new int[1];
if (cp.Advise(iDispatch.getAddress(), pCookie) == COM.S_OK)
eventCookie = pCookie[0];
cp.Release();
}
cpc.Release();
}
}
void addListener(int eventID, OleListener listener) {
if (listener == null) OLE.error (SWT.ERROR_NULL_ARGUMENT);
if (eventTable == null) eventTable = new OleEventTable ();
eventTable.hook(eventID, listener);
}
int AddRef() {
refCount++;
return refCount;
}
private void createCOMInterfaces() {
iDispatch = new COMObject(new int[]{2, 0, 0, 1, 3, 4, 8}){
public int /*long*/ method0(int /*long*/[] args) {return QueryInterface(args[0], args[1]);}
public int /*long*/ method1(int /*long*/[] args) {return AddRef();}
public int /*long*/ method2(int /*long*/[] args) {return Release();}
// method3 GetTypeInfoCount - not implemented
// method4 GetTypeInfo - not implemented
// method5 GetIDsOfNames - not implemented
public int /*long*/ method6(int /*long*/[] args) {return Invoke((int)/*64*/args[0], args[1], (int)/*64*/args[2], (int)/*64*/args[3], args[4], args[5], args[6], args[7]);}
};
}
void disconnect() {
// disconnect event sink
if (eventCookie != 0 && objIUnknown != null) {
int /*long*/[] ppvObject = new int /*long*/[1];
if (objIUnknown.QueryInterface(COM.IIDIConnectionPointContainer, ppvObject) == COM.S_OK) {
IConnectionPointContainer cpc = new IConnectionPointContainer(ppvObject[0]);
if (cpc.FindConnectionPoint(eventGuid, ppvObject) == COM.S_OK) {
IConnectionPoint cp = new IConnectionPoint(ppvObject[0]);
if (cp.Unadvise(eventCookie) == COM.S_OK) {
eventCookie = 0;
}
cp.Release();
}
cpc.Release();
}
}
}
private void disposeCOMInterfaces() {
if (iDispatch != null)
iDispatch.dispose();
iDispatch = null;
}
private int Invoke(int dispIdMember, int /*long*/ riid, int lcid, int dwFlags, int /*long*/ pDispParams, int /*long*/ pVarResult, int /*long*/ pExcepInfo, int /*long*/ pArgErr)
{
if (eventTable == null || !eventTable.hooks(dispIdMember)) return COM.S_OK;
// Construct an array of the parameters that are passed in
// Note: parameters are passed in reverse order - here we will correct the order
Variant[] eventInfo = null;
if (pDispParams != 0) {
DISPPARAMS dispParams = new DISPPARAMS();
COM.MoveMemory(dispParams, pDispParams, DISPPARAMS.sizeof);
eventInfo = new Variant[dispParams.cArgs];
int size = VARIANT.sizeof;
int /*long*/ offset = (dispParams.cArgs - 1) * size;
for (int j = 0; j < dispParams.cArgs; j++){
eventInfo[j] = new Variant();
eventInfo[j].setData(dispParams.rgvarg + offset);
offset = offset - size;
}
}
OleEvent event = new OleEvent();
event.arguments = eventInfo;
notifyListener(dispIdMember,event);
return COM.S_OK;
}
/**
* 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 = widget;
eventTable.sendEvent (event);
}
private int QueryInterface(int /*long*/ riid, int /*long*/ 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) || COM.IsEqualGUID(guid, COM.IIDIDispatch) ||
COM.IsEqualGUID(guid, eventGuid)) {
COM.MoveMemory(ppvObject, new int /*long*/[] {iDispatch.getAddress()}, OS.PTR_SIZEOF);
AddRef();
return OLE.S_OK;
}
COM.MoveMemory(ppvObject, new int /*long*/[] {0}, OS.PTR_SIZEOF);
return COM.E_NOINTERFACE;
}
int Release() {
refCount--;
if (refCount == 0) {
disposeCOMInterfaces();
}
return refCount;
}
void removeListener(int eventID, OleListener listener) {
if (listener == null) OLE.error (SWT.ERROR_NULL_ARGUMENT);
if (eventTable == null) return;
eventTable.unhook (eventID, listener);
}
boolean hasListeners() {
return eventTable.hasEntries();
}
}
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