1 /******************************************************************************* 2 * Copyright (c) 2000, 2013 IBM Corporation and others. 3 * 4 * This program and the accompanying materials 5 * are made available under the terms of the Eclipse Public License 2.0 6 * which accompanies this distribution, and is available at 7 * https://www.eclipse.org/legal/epl-2.0/ 8 * 9 * SPDX-License-Identifier: EPL-2.0 10 * 11 * Contributors: 12 * IBM Corporation - initial API and implementation 13 * Patrick Chuong (Texas Instruments) - Improve usability of the breakpoint view (Bug 238956) 14 *******************************************************************************/ 15 package org.eclipse.debug.internal.ui.views.breakpoints; 16 17 import java.util.ArrayList; 18 import java.util.List; 19 20 import org.eclipse.jface.util.LocalSelectionTransfer; 21 import org.eclipse.jface.viewers.ISelection; 22 import org.eclipse.jface.viewers.IStructuredSelection; 23 import org.eclipse.jface.viewers.ITreeSelection; 24 import org.eclipse.jface.viewers.TreePath; 25 import org.eclipse.jface.viewers.TreeViewer; 26 import org.eclipse.jface.viewers.ViewerDropAdapter; 27 import org.eclipse.swt.dnd.DropTargetEvent; 28 import org.eclipse.swt.dnd.TransferData; 29 import org.eclipse.swt.widgets.Item; 30 import org.eclipse.swt.widgets.TreeItem; 31 32 /** 33 * BreakpointsDropAdapter 34 */ 35 public class BreakpointsDropAdapter extends ViewerDropAdapter { 36 37 private Item fTarget = null; 38 private TreePath fPath = null; 39 private BreakpointsView fView; 40 41 /** 42 * Constructor 43 * @param viewer the backing viewer 44 */ BreakpointsDropAdapter(TreeViewer viewer)45 protected BreakpointsDropAdapter(TreeViewer viewer) { 46 super(viewer); 47 setFeedbackEnabled(false); 48 } 49 BreakpointsDropAdapter(TreeViewer viewer, BreakpointsView view)50 protected BreakpointsDropAdapter(TreeViewer viewer, BreakpointsView view) { 51 this(viewer); 52 fView = view; 53 } 54 55 /** 56 * @see org.eclipse.jface.viewers.ViewerDropAdapter#performDrop(java.lang.Object) 57 */ 58 @Override performDrop(Object data)59 public boolean performDrop(Object data) { 60 // This is temporary 61 if (getViewer() instanceof BreakpointsViewer) { 62 return ((BreakpointsViewer)getViewer()).performDrop(fTarget, (IStructuredSelection) LocalSelectionTransfer.getTransfer().getSelection()); 63 } else if (fView != null) { 64 ISelection selection = LocalSelectionTransfer.getTransfer().getSelection(); 65 if (fPath != null && selection instanceof ITreeSelection) { 66 return fView.performDrop(fPath, (ITreeSelection) selection); 67 } 68 } 69 return false; 70 } 71 72 /** 73 * @see org.eclipse.jface.viewers.ViewerDropAdapter#determineTarget(org.eclipse.swt.dnd.DropTargetEvent) 74 */ 75 @Override determineTarget(DropTargetEvent event)76 protected Object determineTarget(DropTargetEvent event) { 77 fTarget = (Item) event.item; 78 if (fTarget instanceof TreeItem) { 79 List<Object> list = new ArrayList<>(); 80 TreeItem item = (TreeItem)fTarget; 81 while (item != null) { 82 list.add(item.getData()); 83 item = item.getParentItem(); 84 } 85 fPath = new TreePath(list.toArray()); 86 } else { 87 fPath = null; 88 } 89 return fTarget; 90 } 91 92 /** 93 * @see org.eclipse.jface.viewers.ViewerDropAdapter#validateDrop(java.lang.Object, int, org.eclipse.swt.dnd.TransferData) 94 */ 95 @Override validateDrop(Object target, int operation, TransferData transferType)96 public boolean validateDrop(Object target, int operation, TransferData transferType) { 97 // This is temporary 98 if (getViewer() instanceof BreakpointsViewer) { 99 return ((BreakpointsViewer)getViewer()).canDrop(fTarget, (IStructuredSelection) LocalSelectionTransfer.getTransfer().getSelection()); 100 } else { 101 ISelection selection = LocalSelectionTransfer.getTransfer().getSelection(); 102 if (fPath != null && selection instanceof ITreeSelection) { 103 return fView.canDrop(fPath, (ITreeSelection) LocalSelectionTransfer.getTransfer().getSelection()); 104 } 105 } 106 return false; 107 } 108 } 109