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Package: CutCopyPasteListener$1
CutCopyPasteListener$1
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Coverage
1: /*******************************************************************************
2: * Copyright (c) 2011-2016 EclipseSource Muenchen GmbH and others.
3: *
4: * All rights reserved. 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: * Johannes Faltermeier - initial API and implementation
13: ******************************************************************************/
14: package org.eclipse.emf.ecp.view.spi.table.ui.rcp;
15:
16: import java.util.Collection;
17:
18: import org.eclipse.emf.common.command.Command;
19: import org.eclipse.emf.common.command.UnexecutableCommand;
20: import org.eclipse.emf.ecore.EObject;
21: import org.eclipse.emf.ecore.EStructuralFeature;
22: import org.eclipse.emf.ecore.EStructuralFeature.Setting;
23: import org.eclipse.emf.edit.command.CutToClipboardCommand;
24: import org.eclipse.emf.edit.command.PasteFromClipboardCommand;
25: import org.eclipse.emf.edit.domain.EditingDomain;
26: import org.eclipse.emf.edit.ui.action.CopyAction;
27: import org.eclipse.emf.edit.ui.action.CutAction;
28: import org.eclipse.emf.edit.ui.action.PasteAction;
29: import org.eclipse.jface.viewers.ISelectionChangedListener;
30: import org.eclipse.jface.viewers.IStructuredSelection;
31: import org.eclipse.jface.viewers.SelectionChangedEvent;
32: import org.eclipse.jface.viewers.StructuredSelection;
33: import org.eclipse.jface.viewers.TableViewer;
34: import org.eclipse.swt.SWT;
35: import org.eclipse.swt.events.KeyEvent;
36: import org.eclipse.swt.events.KeyListener;
37: import org.eclipse.ui.actions.BaseSelectionListenerAction;
38:
39: /**
40: * On creation this listener registers itself on a given {@link TableViewer} and register the according EMF
41: * Cut/Copy/Paste-Actions. They are triggered using keybindings.
42: *
43: * @author Johannes Faltermeier
44: *
45: */
46: public class CutCopyPasteListener implements KeyListener, ISelectionChangedListener {
47:
48: private final CutAction cutAction;
49: private final CopyAction copyAction;
50: private final PasteAction pasteAction;
51:
52: private EObject parent;
53: private EStructuralFeature feature;
54:
55: /**
56: * Constructs this listener.
57: *
58: * @param tableViewer the {@link TableViewer}
59: * @param editingDomain the {@link EditingDomain} (contains the used clipboard)
60: * @param setting the parent EObject on which the paste will be performed
61: */
62: public CutCopyPasteListener(TableViewer tableViewer, EditingDomain editingDomain, Setting setting) {
63: parent = setting.getEObject();
64: feature = setting.getEStructuralFeature();
65: cutAction = new CutAction(editingDomain) {
66: @Override
67: public Command createCommand(Collection<?> selection) {
68: return CutToClipboardCommand.create(domain, parent, feature, selection);
69: }
70: };
71: copyAction = new CopyAction(editingDomain);
72: pasteAction = new PasteAction(editingDomain) {
73: @Override
74: public Command createCommand(Collection<?> selection) {
75: if (selection.size() == 1) {
76: return PasteFromClipboardCommand.create(domain, parent, feature);
77: }
78: return UnexecutableCommand.INSTANCE;
79: }
80: };
81: tableViewer.getTable().addKeyListener(this);
82: tableViewer.addSelectionChangedListener(this);
83: }
84:
85: @Override
86: public void selectionChanged(SelectionChangedEvent event) {
87: final IStructuredSelection currentSelection = event.getSelection() instanceof IStructuredSelection
88: ? (IStructuredSelection) event.getSelection()
89: : new StructuredSelection();
90: cutAction.selectionChanged(currentSelection);
91: copyAction.selectionChanged(currentSelection);
92: }
93:
94: @Override
95: public void keyPressed(KeyEvent e) {
96: /* no op */
97: }
98:
99: @Override
100: public void keyReleased(KeyEvent e) {
101: if (isActivated(e, SWT.CTRL, 'x')) {
102: execute(cutAction);
103: } else if (isActivated(e, SWT.CTRL, 'c')) {
104: execute(copyAction);
105: } else if (isActivated(e, SWT.CTRL, 'v')) {
106: /*
107: * set selection to parent to recheck enabled state. This works only, because keybindings can be used any
108: * time. If we would also want a menu, we need to handle this differently.
109: */
110: pasteAction.selectionChanged(new StructuredSelection(parent));
111: execute(pasteAction);
112: }
113: }
114:
115: private static void execute(BaseSelectionListenerAction delegatedAction) {
116: if (!delegatedAction.isEnabled()) {
117: return;
118: }
119: delegatedAction.run();
120: }
121:
122: private static boolean isActivated(KeyEvent event, int swtMask, char c) {
123: return (event.stateMask & swtMask) == swtMask && event.keyCode == c;
124: }
125:
126: /**
127: * Called to notify this listener that the domain model has changed.
128: *
129: * @param setting the new table setting
130: */
131: public void rootDomainModelChanged(Setting setting) {
132: parent = setting.getEObject();
133: feature = setting.getEStructuralFeature();
134: }
135:
136: }