blob: c5239271e0c939396afb308822d031f8c5945787 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
|
/*****************************************************************************
* Copyright (c) 2014 CEA LIST.
*
* 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:
* Camille Letavernier (CEA LIST) camille.letavernier@cea.fr - Initial API and implementation
*****************************************************************************/
package org.eclipse.papyrus.infra.gmfdiag.common.editpolicies;
import org.eclipse.emf.common.notify.Adapter;
import org.eclipse.gmf.runtime.gef.ui.internal.editpolicies.GraphicalEditPolicyEx;
import org.eclipse.gmf.runtime.notation.View;
import org.eclipse.papyrus.infra.core.services.ServiceException;
import org.eclipse.papyrus.infra.gmfdiag.common.Activator;
import org.eclipse.papyrus.infra.gmfdiag.common.decoration.ExternalReferenceMarker;
import org.eclipse.papyrus.infra.gmfdiag.common.helper.NotationHelper;
import org.eclipse.papyrus.infra.gmfdiag.common.utils.ServiceUtilsForEditPart;
import org.eclipse.papyrus.infra.services.decoration.DecorationService;
import org.eclipse.papyrus.infra.services.markerlistener.IPapyrusMarker;
/**
* A generic EditPolicy which applies {@link ExternalReferenceMarker} to EditParts when they have been imported
* (According to {@link NotationHelper#isExternalRef(View)}
*
* @author Camille Letavernier
*
*/
// Rely on the GraphicalEditPolicyEx, which is less expensive than adding a listener to detect changes in the containment tree
@SuppressWarnings("restriction")
public class ExternalReferenceEditPolicy extends GraphicalEditPolicyEx {
/**
* The Edit Policy Role/ID
*/
public static final Object EDIT_POLICY_ROLE = Activator.ID + ".externalReferenceDecorator"; //$NON-NLS-1$
/**
* Last known value for isExternalReference
*/
protected boolean isExternalReference = false;
protected DecorationService decorationService;
protected IPapyrusMarker marker;
protected Adapter listener;
@Override
public void activate() {
super.activate();
try {
decorationService = ServiceUtilsForEditPart.getInstance().getService(DecorationService.class, getHost());
refresh();
} catch (ServiceException ex) {
// Ignored; do nothing
}
}
@Override
public void refresh() {
if (getView() == null) {
return;
}
if (decorationService == null) {
return;
}
// Add or remove the decoration when the current value is different from the last known value
if (isExternalRef(getView()) != isExternalReference) {
isExternalReference = !isExternalReference;
if (isExternalReference) {
decorationService.addDecoration(getMarker(), getView());
} else {
decorationService.removeDecoration(getMarker().toString());
}
// We need to call refresh again, so that the decorator gets display.
// We shouldn't end up with a StackOverFlow, because we arrive here only when the "isExternalRef" value changes
getHost().refresh();
}
}
protected boolean isExternalRef(View view) {
return NotationHelper.isExternalRef(view);
}
/**
* Returns the marker instance. It is never null
*
* @return
*/
protected IPapyrusMarker getMarker() {
if (marker == null) {
marker = new ExternalReferenceMarker(getView());
}
return marker;
}
/**
* Return the view associated to this edit policy
*
* @return
*/
protected View getView() {
return (View) getHost().getModel();
}
@Override
public void deactivate() {
super.deactivate();
if (marker != null && decorationService != null) {
// Remove the marker from the View to avoid duplication
decorationService.removeDecoration(getMarker().toString());
isExternalReference = false;
}
marker = null;
decorationService = null;
}
}
|
