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1 | /******************************************************************************* |
2 | * Copyright (c) 2000, 2011 IBM Corporation and others. | |
3 | * All rights reserved. This program and the accompanying materials | |
4 | * are made available under the terms of the Eclipse Public License v1.0 | |
5 | * which accompanies this distribution, and is available at | |
6 | * http://www.eclipse.org/legal/epl-v10.html | |
7 | * | |
8 | * Contributors: | |
9 | * IBM Corporation - initial API and implementation | |
10 | *******************************************************************************/ | |
11 | package org.eclipse.jdt.internal.ui.packageview; | |
12 | ||
13 | import org.eclipse.swt.dnd.DND; | |
14 | import org.eclipse.swt.dnd.DropTargetEvent; | |
15 | import org.eclipse.swt.dnd.FileTransfer; | |
16 | import org.eclipse.swt.dnd.Transfer; | |
17 | import org.eclipse.swt.dnd.TransferData; | |
18 | import org.eclipse.swt.widgets.Display; | |
19 | import org.eclipse.swt.widgets.Shell; | |
20 | ||
21 | import org.eclipse.core.resources.IContainer; | |
22 | import org.eclipse.core.resources.IResource; | |
23 | ||
24 | import org.eclipse.jface.util.TransferDropTargetListener; | |
25 | import org.eclipse.jface.viewers.StructuredViewer; | |
26 | ||
27 | import org.eclipse.ui.actions.CopyFilesAndFoldersOperation; | |
28 | ||
29 | import org.eclipse.jdt.core.IJavaElement; | |
30 | import org.eclipse.jdt.core.IJavaProject; | |
31 | import org.eclipse.jdt.core.IPackageFragment; | |
32 | import org.eclipse.jdt.core.IPackageFragmentRoot; | |
33 | import org.eclipse.jdt.core.JavaModelException; | |
34 | ||
35 | import org.eclipse.jdt.internal.corext.util.Resources; | |
36 | ||
37 | import org.eclipse.jdt.internal.ui.dnd.JdtViewerDropAdapter; | |
38 | import org.eclipse.jdt.internal.ui.util.ExceptionHandler; | |
39 | ||
40 | /** | |
41 | * Adapter to handle file drop from other applications. | |
42 | */ | |
43 | public class FileTransferDropAdapter extends JdtViewerDropAdapter implements TransferDropTargetListener { | |
44 | ||
45 | public FileTransferDropAdapter(StructuredViewer viewer) { | |
46 | super(viewer); | |
47 | ||
48 | setScrollEnabled(true); | |
49 | setExpandEnabled(true); | |
50 | setFeedbackEnabled(false); | |
51 | } | |
52 | ||
53 | //---- TransferDropTargetListener interface --------------------------------------- | |
54 | ||
55 | /** | |
56 | * {@inheritDoc} | |
57 | */ | |
58 | public Transfer getTransfer() { | |
59 | return FileTransfer.getInstance(); | |
60 | } | |
61 | ||
62 | /** | |
63 | * {@inheritDoc} | |
64 | */ | |
65 | public boolean isEnabled(DropTargetEvent event) { | |
66 | Object target= event.item != null ? event.item.getData() : null; | |
67 | if (target == null) | |
68 | return false; | |
69 | return target instanceof IJavaElement || target instanceof IResource; | |
70 | } | |
71 | ||
72 | //---- Actual DND ----------------------------------------------------------------- | |
73 | ||
74 | /** | |
75 | * {@inheritDoc} | |
76 | */ | |
77 | @Override | |
78 | public boolean validateDrop(Object target, int operation, TransferData transferType) { | |
79 | return determineOperation(target, operation, transferType, DND.DROP_MOVE | DND.DROP_LINK | DND.DROP_COPY) != DND.DROP_NONE; | |
80 | } | |
81 | ||
82 | /** | |
83 | * {@inheritDoc} | |
84 | */ | |
85 | @Override | |
86 | protected int determineOperation(Object target, int operation, TransferData transferType, int operations) { | |
87 | ||
88 | boolean isPackageFragment= target instanceof IPackageFragment; | |
89 | boolean isJavaProject= target instanceof IJavaProject; | |
90 | boolean isPackageFragmentRoot= target instanceof IPackageFragmentRoot; | |
91 | boolean isContainer= target instanceof IContainer; | |
92 | ||
93 | if (!(isPackageFragment || isJavaProject || isPackageFragmentRoot || isContainer)) | |
94 | return DND.DROP_NONE; | |
95 | ||
96 | if (isContainer) { | |
97 | IContainer container= (IContainer)target; | |
98 | if (container.isAccessible() && !Resources.isReadOnly(container)) | |
99 | return DND.DROP_COPY; | |
100 | } else { | |
101 | IJavaElement element= (IJavaElement)target; | |
102 | if (!element.isReadOnly()) | |
103 | return DND.DROP_COPY; | |
104 | } | |
105 | ||
106 | return DND.DROP_NONE; | |
107 | } | |
108 | ||
109 | /** | |
110 | * {@inheritDoc} | |
111 | */ | |
112 | @Override | |
113 | public boolean performDrop(final Object data) { | |
114 | try { | |
115 | final int currentOperation= getCurrentOperation(); | |
116 | ||
117 | if (data == null || !(data instanceof String[]) || currentOperation != DND.DROP_COPY) | |
118 | return false; | |
119 | ||
120 | final IContainer target= getActualTarget(getCurrentTarget()); | |
121 | if (target == null) | |
122 | return false; | |
123 | ||
124 | // Run the import operation asynchronously. | |
125 | // Otherwise the drag source (e.g., Windows Explorer) will be blocked | |
126 | // while the operation executes. Fixes bug 35796. | |
127 | Display.getCurrent().asyncExec(new Runnable() { | |
128 | public void run() { | |
129 | getShell().forceActive(); | |
130 | new CopyFilesAndFoldersOperation(getShell()).copyOrLinkFiles((String[])data, target, currentOperation); | |
131 | } | |
132 | }); | |
133 | ||
134 | return true; | |
135 | } catch (JavaModelException e) { | |
136 | String title= PackagesMessages.DropAdapter_errorTitle; | |
137 | String message= PackagesMessages.DropAdapter_errorMessage; | |
138 | ExceptionHandler.handle(e, getShell(), title, message); | |
139 | return false; | |
140 | } | |
141 | } | |
142 | ||
143 | private IContainer getActualTarget(Object dropTarget) throws JavaModelException{ | |
144 | if (dropTarget instanceof IContainer) | |
145 | return (IContainer)dropTarget; | |
146 | else if (dropTarget instanceof IJavaElement) | |
147 | return getActualTarget(((IJavaElement)dropTarget).getCorrespondingResource()); | |
148 | return null; | |
149 | } | |
150 | ||
151 | private Shell getShell() { | |
152 | return getViewer().getControl().getShell(); | |
153 | } | |
154 | } |