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/*******************************************************************************
* Copyright (c) 2000, 2005 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.team.internal.ccvs.ui;
import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.IResource;
import org.eclipse.jface.viewers.StructuredViewer;
import org.eclipse.jface.viewers.ViewerDropAdapter;
import org.eclipse.swt.dnd.DND;
import org.eclipse.swt.dnd.DropTargetEvent;
import org.eclipse.swt.dnd.TransferData;
import org.eclipse.team.internal.ccvs.core.ICVSRemoteFile;
import org.eclipse.ui.part.ResourceTransfer;
public class HistoryDropAdapter extends ViewerDropAdapter {
HistoryView view;
public HistoryDropAdapter(StructuredViewer viewer, HistoryView view) {
super(viewer);
this.view = view;
}
/*
* Override dragOver to slam the detail to DROP_LINK, as we do not
* want to really execute a DROP_MOVE, although we want to respond
* to it.
*/
public void dragOver(DropTargetEvent event) {
if ((event.operations & DND.DROP_LINK) == DND.DROP_LINK) {
event.detail = DND.DROP_LINK;
}
super.dragOver(event);
}
/*
* Override drop to slam the detail to DROP_LINK, as we do not
* want to really execute a DROP_MOVE, although we want to respond
* to it.
*/
public void drop(DropTargetEvent event) {
super.drop(event);
event.detail = DND.DROP_LINK;
}
public boolean performDrop(Object data) {
if (data == null) return false;
if(data instanceof IResource[]) {
IResource[] sources = (IResource[])data;
if (sources.length == 0) return false;
IResource resource = sources[0];
if (!(resource instanceof IFile)) return false;
view.showHistory(resource, true /* fetch */);
return true;
} else if( data instanceof ICVSRemoteFile) {
view.showHistory((ICVSRemoteFile) data, true /* fetch */);
return true;
}
return false;
}
public boolean validateDrop(Object target, int operation, TransferData transferType) {
if (transferType != null &&
(ResourceTransfer.getInstance().isSupportedType(transferType) ||
CVSResourceTransfer.getInstance().isSupportedType(transferType))) {
return true;
}
return false;
}
}
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