org.eclipse.swt.ole.win32.OleEventSinkImpl Maven / Gradle / Ivy
package org.eclipse.swt.ole.win32;
import org.eclipse.swt.*;
import org.eclipse.swt.internal.ole.win32.*;
/**
* @author S2267
*
* To change the template for this generated type comment go to
* Window>Preferences>Java>Code Generation>Code and Comments
*/
class OleEventSinkImpl {
private COMObject iDispatch;
private int refCount;
private IUnknown objIUnknown;
private int eventCookie;
private GUID eventGuid;
private OleEventTable eventTable;
/**
*
*/
public OleEventSinkImpl(int iUnknown, GUID riid) {
this.eventGuid = riid;
this.objIUnknown = new IUnknown(iUnknown);
createCOMInterfaces();
}
void connect () {
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(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 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() {
// 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(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 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;
try {
notifyListener(dispIdMember,event);
} catch (Throwable t) {
}
return COM.S_OK;
}
/**
* Notify listeners of an event.
*
* This method notifies all listeners that an event
* has occurred.
*
* @param eventType the desired SWT event
* @param event the event data
*
* @exception SWTError
* - ERROR_THREAD_INVALID_ACCESS when called from the wrong thread
* - ERROR_WIDGET_DISPOSED when the widget has been disposed
* - ERROR_NULL_ARGUMENT when handler is null
*
*/
private void notifyListener (int eventType, OleEvent event) {
if (event == null) OLE.error (SWT.ERROR_NULL_ARGUMENT);
if (eventTable == null) return;
event.type = eventType;
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, eventGuid)) {
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);
}
boolean hasListeners() {
return eventTable.hasEntries();
}
}