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/*******************************************************************************
* Copyright (c) 2000, 2013 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
* Patrick Chuong (Texas Instruments) - Improve usability of the breakpoint view (Bug 238956)
*******************************************************************************/
package org.eclipse.debug.internal.ui.views.breakpoints;
import java.util.ArrayList;
import java.util.List;
import org.eclipse.jface.util.LocalSelectionTransfer;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.ITreeSelection;
import org.eclipse.jface.viewers.TreePath;
import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.jface.viewers.ViewerDropAdapter;
import org.eclipse.swt.dnd.DropTargetEvent;
import org.eclipse.swt.dnd.TransferData;
import org.eclipse.swt.widgets.Item;
import org.eclipse.swt.widgets.TreeItem;
/**
* BreakpointsDropAdapter
*/
public class BreakpointsDropAdapter extends ViewerDropAdapter {
private Item fTarget = null;
private TreePath fPath = null;
private BreakpointsView fView;
/**
* Constructor
* @param viewer the backing viewer
*/
protected BreakpointsDropAdapter(TreeViewer viewer) {
super(viewer);
setFeedbackEnabled(false);
}
protected BreakpointsDropAdapter(TreeViewer viewer, BreakpointsView view) {
this(viewer);
fView = view;
}
/**
* @see org.eclipse.jface.viewers.ViewerDropAdapter#performDrop(java.lang.Object)
*/
@Override
public boolean performDrop(Object data) {
// This is temporary
if (getViewer() instanceof BreakpointsViewer) {
return ((BreakpointsViewer)getViewer()).performDrop(fTarget, (IStructuredSelection) LocalSelectionTransfer.getTransfer().getSelection());
} else if (fView != null) {
ISelection selection = LocalSelectionTransfer.getTransfer().getSelection();
if (fPath != null && selection instanceof ITreeSelection) {
if (selection instanceof ITreeSelection) {
return fView.performDrop(fPath, (ITreeSelection) LocalSelectionTransfer.getTransfer().getSelection());
}
}
}
return false;
}
/**
* @see org.eclipse.jface.viewers.ViewerDropAdapter#determineTarget(org.eclipse.swt.dnd.DropTargetEvent)
*/
@Override
protected Object determineTarget(DropTargetEvent event) {
fTarget = (Item) event.item;
if (fTarget instanceof TreeItem) {
List<Object> list = new ArrayList<Object>();
TreeItem item = (TreeItem)fTarget;
while (item != null) {
list.add(item.getData());
item = item.getParentItem();
}
fPath = new TreePath(list.toArray());
} else {
fPath = null;
}
return fTarget;
}
/**
* @see org.eclipse.jface.viewers.ViewerDropAdapter#validateDrop(java.lang.Object, int, org.eclipse.swt.dnd.TransferData)
*/
@Override
public boolean validateDrop(Object target, int operation, TransferData transferType) {
// This is temporary
if (getViewer() instanceof BreakpointsViewer) {
return ((BreakpointsViewer)getViewer()).canDrop(fTarget, (IStructuredSelection) LocalSelectionTransfer.getTransfer().getSelection());
} else {
ISelection selection = LocalSelectionTransfer.getTransfer().getSelection();
if (fPath != null && selection instanceof ITreeSelection) {
if (selection instanceof ITreeSelection) {
return fView.canDrop(fPath, (ITreeSelection) LocalSelectionTransfer.getTransfer().getSelection());
}
}
}
return false;
}
}
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