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package org.eclipse.swt.ole.win32;
/*
* (c) Copyright IBM Corp. 2000, 2001.
* All Rights Reserved
*/
import org.eclipse.swt.*;
import org.eclipse.swt.internal.ole.win32.*;
import org.eclipse.swt.internal.win32.*;
final class OleEventSink
{
private OleControlSite controlSite;
private COMObject iUnknown;
private COMObject iDispatch;
private int refCount;
private int eventCookie;
private GUID eventSinkDispInterface;
private OleEventTable eventTable;
OleEventSink(OleControlSite controlSite) {
this.controlSite = controlSite;
createCOMInterfaces();
}
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;
}
void connect(IUnknown objIUnknown) {
// What is the custom Event Sink interface?
eventSinkDispInterface = getEventSinkDispInterface(objIUnknown);
// It is possible that the Control does not have an Event sink.
// In this case, just carry on.
if (eventSinkDispInterface == null) return;
int[] ppvObject = new int[1];
if (objIUnknown.QueryInterface(COM.IIDIConnectionPointContainer, ppvObject) == COM.S_OK) {
IConnectionPointContainer cpc = new IConnectionPointContainer(ppvObject[0]);
int[] ppCP = new int[1];
if (cpc.FindConnectionPoint(eventSinkDispInterface, ppCP) == COM.S_OK) {
IConnectionPoint cp = new IConnectionPoint(ppCP[0]);
int[] pCookie = new int[1];
if (cp.Advise(iUnknown.getAddress(), pCookie) == COM.S_OK)
eventCookie = pCookie[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}){
public int method0(int[] args) {return QueryInterface(args[0], args[1]);}
public int method1(int[] args) {return AddRef();}
public int method2(int[] args) {return Release();}
};
iDispatch = new COMObject(new int[]{2, 0, 0, 1, 3, 4, 8}){
public int method0(int[] args) {return QueryInterface(args[0], args[1]);}
public int method1(int[] args) {return AddRef();}
public int method2(int[] args) {return Release();}
// method3 GetTypeInfoCount - not implemented
// method4 GetTypeInfo - not implemented
// method5 GetIDsOfNames - not implemented
public int method6(int[] args) {return Invoke(args[0], args[1], args[2], args[3], args[4], args[5], args[6], args[7]);}
};
}
void disconnect(IUnknown objIUnknown) {
// disconnect event sink
if (eventCookie != 0 && objIUnknown != null) {
int[] ppvObject = new int[1];
if (objIUnknown.QueryInterface(COM.IIDIConnectionPointContainer, ppvObject) == COM.S_OK) {
IConnectionPointContainer cpc = new IConnectionPointContainer(ppvObject[0]);
if (cpc.FindConnectionPoint(eventSinkDispInterface, 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 (iUnknown != null);
iUnknown.dispose();
iUnknown = null;
if (iDispatch != null)
iDispatch.dispose();
iDispatch = null;
}
private GUID getEventSinkDispInterface(IUnknown objIUnknown) {
// get Event Sink I/F from IProvideClassInfo2
int[] ppvObject = new int[1];
if (objIUnknown.QueryInterface(COM.IIDIProvideClassInfo2, ppvObject) == COM.S_OK) {
IProvideClassInfo2 pci2 = new IProvideClassInfo2(ppvObject[0]);
GUID eventsinkdisp = new GUID();
int result = pci2.GetGUID(COM.GUIDKIND_DEFAULT_SOURCE_DISP_IID, eventsinkdisp);
pci2.Release();
if (result == COM.S_OK) {
eventSinkDispInterface = eventsinkdisp;
return eventSinkDispInterface;
}
}
// get Event Sink I/F from IProvideClassInfo
if (objIUnknown.QueryInterface(COM.IIDIProvideClassInfo, ppvObject) == COM.S_OK) {
int[] ppTI = new int[1];
int[] ppEI = new int[1];
TYPEATTR typeAttribute = null;
IProvideClassInfo pci = new IProvideClassInfo(ppvObject[0]);
int result = pci.GetClassInfo(ppTI);
pci.Release();
if (result != COM.S_OK) return null;
if (ppTI != null && ppTI.length == 1) {
ITypeInfo classInfo = new ITypeInfo(ppTI[0]);
int[] ppTypeAttr = new int[1];
result = classInfo.GetTypeAttr(ppTypeAttr);
if (result != COM.S_OK) {
classInfo.Release();
return null;
}
typeAttribute = new TYPEATTR();
COM.MoveMemory(typeAttribute, ppTypeAttr[0], TYPEATTR.sizeof);
classInfo.ReleaseTypeAttr(ppTypeAttr[0]);
int implMask = COM.IMPLTYPEFLAG_FDEFAULT | COM.IMPLTYPEFLAG_FSOURCE | COM.IMPLTYPEFLAG_FRESTRICTED;
int implBits = COM.IMPLTYPEFLAG_FDEFAULT | COM.IMPLTYPEFLAG_FSOURCE;
for (int i = 0; i < typeAttribute.cImplTypes; i++) {
int[] pImplTypeFlags = new int[1];
if (classInfo.GetImplTypeFlags(i, pImplTypeFlags) == COM.S_OK) {
if ((pImplTypeFlags[0] & implMask) == implBits) {
int[] pRefType = new int[1];
if (classInfo.GetRefTypeOfImplType(i, pRefType) == COM.S_OK) {
classInfo.GetRefTypeInfo(pRefType[0], ppEI);
}
}
}
}
classInfo.Release();
//
if (ppEI != null && ppEI.length == 1) {
ppTypeAttr = new int[1];
ITypeInfo eventInfo = new ITypeInfo(ppEI[0]);
if (eventInfo.GetTypeAttr(ppTypeAttr) == COM.S_OK) {
typeAttribute = new TYPEATTR();
COM.MoveMemory(typeAttribute, ppTypeAttr[0], TYPEATTR.sizeof);
eventInfo.ReleaseTypeAttr(ppTypeAttr[0]);
if (ppTypeAttr != null && ppTypeAttr[0] != 0) {
eventSinkDispInterface = new GUID();
eventSinkDispInterface.data1 = typeAttribute.guid_data1;
eventSinkDispInterface.data2 = typeAttribute.guid_data2;
eventSinkDispInterface.data3 = typeAttribute.guid_data3;
eventSinkDispInterface.b0 = typeAttribute.guid_b0;
eventSinkDispInterface.b1 = typeAttribute.guid_b1;
eventSinkDispInterface.b2 = typeAttribute.guid_b2;
eventSinkDispInterface.b3 = typeAttribute.guid_b3;
eventSinkDispInterface.b4 = typeAttribute.guid_b4;
eventSinkDispInterface.b5 = typeAttribute.guid_b5;
eventSinkDispInterface.b6 = typeAttribute.guid_b6;
eventSinkDispInterface.b7 = typeAttribute.guid_b7;
}
}
eventInfo.Release();
}
}
}
return eventSinkDispInterface;
}
private int Invoke(int dispIdMember, int riid, int lcid, int dwFlags, int pDispParams, int pVarResult, int pExcepInfo, int 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 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 SWTError <ul>
* <li>ERROR_THREAD_INVALID_ACCESS when called from the wrong thread</li>
* <li>ERROR_WIDGET_DISPOSED when the widget has been disposed</li>
* <li>ERROR_NULL_ARGUMENT when handler is null</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 QueryInterface(int riid, 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) || COM.IsEqualGUID(guid, COM.IIDIDispatch) ||
COM.IsEqualGUID(guid, eventSinkDispInterface)) {
COM.MoveMemory(ppvObject, new int[] {iDispatch.getAddress()}, 4);
AddRef();
return OLE.S_OK;
}
COM.MoveMemory(ppvObject, new int[] {0}, 4);
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);
}
}
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