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
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
|
/*******************************************************************************
* Copyright (c) 2006, 2012 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
* Wind River Systems - Fix for viewer state save/restore [188704]
* Pawel Piech (Wind River) - added support for a virtual tree model viewer (Bug 242489)
*******************************************************************************/
package org.eclipse.debug.internal.ui.viewers.model;
import java.util.ArrayList;
import java.util.List;
import org.eclipse.debug.internal.ui.DebugUIPlugin;
import org.eclipse.debug.internal.ui.viewers.model.provisional.IElementContentProvider;
import org.eclipse.debug.internal.ui.viewers.model.provisional.IHasChildrenUpdate;
import org.eclipse.jface.viewers.TreePath;
/**
* @since 3.3
*/
class HasChildrenUpdate extends ViewerUpdateMonitor implements IHasChildrenUpdate {
private boolean fHasChildren = false;
private List fBatchedRequests = null;
/**
* Constructs a request to update an element
*
* @param provider the content provider
* @param viewerInput the current input
* @param elementPath the path to the element being update
* @param element the element
* @param elementContentProvider the content provider for the element
*/
public HasChildrenUpdate(TreeModelContentProvider provider, Object viewerInput, TreePath elementPath, Object element, IElementContentProvider elementContentProvider) {
super(provider, viewerInput, elementPath, element, elementContentProvider, provider.getPresentationContext());
}
/* (non-Javadoc)
* @see org.eclipse.debug.internal.ui.viewers.model.provisional.viewers.ViewerUpdateMonitor#performUpdate()
*/
protected void performUpdate() {
TreeModelContentProvider contentProvider = getContentProvider();
TreePath elementPath = getElementPath();
if (!fHasChildren) {
contentProvider.clearFilters(elementPath);
}
if (DebugUIPlugin.DEBUG_CONTENT_PROVIDER && DebugUIPlugin.DEBUG_TEST_PRESENTATION_ID(getPresentationContext())) {
}
contentProvider.getViewer().setHasChildren(elementPath, fHasChildren);
if (fHasChildren) {
contentProvider.getViewer().autoExpand(elementPath);
}
if (elementPath.getSegmentCount() > 0) {
getContentProvider().getStateTracker().restorePendingStateOnUpdate(getElementPath(), -1, true, false, false);
}
}
public void setHasChilren(boolean hasChildren) {
fHasChildren = hasChildren;
}
public String toString() {
StringBuffer buf = new StringBuffer();
buf.append("IHasChildrenUpdate: "); //$NON-NLS-1$
buf.append(getElement());
return buf.toString();
}
/* (non-Javadoc)
* @see org.eclipse.debug.internal.ui.viewers.model.ViewerUpdateMonitor#coalesce(org.eclipse.debug.internal.ui.viewers.model.ViewerUpdateMonitor)
*/
boolean coalesce(ViewerUpdateMonitor request) {
if (request instanceof HasChildrenUpdate) {
if (getElementPath().equals(request.getElementPath())) {
// duplicate request
return true;
} else if (getElementContentProvider().equals(request.getElementContentProvider())) {
if (fBatchedRequests == null) {
fBatchedRequests = new ArrayList();
fBatchedRequests.add(this);
}
fBatchedRequests.add(request);
return true;
}
}
return false;
}
/* (non-Javadoc)
* @see org.eclipse.debug.internal.ui.viewers.model.ViewerUpdateMonitor#startRequest()
*/
void startRequest() {
if (fBatchedRequests == null) {
getElementContentProvider().update(new IHasChildrenUpdate[]{this});
} else {
IHasChildrenUpdate[] updates = (IHasChildrenUpdate[]) fBatchedRequests.toArray(new IHasChildrenUpdate[fBatchedRequests.size()]);
// notify that the other updates have also started to ensure correct sequence
// of model updates - **** start at index 1 since the first (0) update has
// already notified the content provider that it has started.
for (int i = 1; i < updates.length; i++) {
getContentProvider().updateStarted((ViewerUpdateMonitor) updates[i]);
}
getElementContentProvider().update(updates);
}
}
boolean containsUpdate(TreePath path) {
if (getElementPath().equals(path)) {
return true;
} else if (fBatchedRequests != null) {
for (int i = 0; i < fBatchedRequests.size(); i++) {
if (((ViewerUpdateMonitor)fBatchedRequests.get(i)).getElementPath().equals(path)) {
return true;
}
}
}
return false;
}
/* (non-Javadoc)
* @see org.eclipse.debug.internal.ui.viewers.model.ViewerUpdateMonitor#getPriority()
*/
int getPriority() {
return 1;
}
/* (non-Javadoc)
* @see org.eclipse.debug.internal.ui.viewers.model.ViewerUpdateMonitor#getSchedulingPath()
*/
TreePath getSchedulingPath() {
TreePath path = getElementPath();
if (path.getSegmentCount() > 0) {
return path.getParentPath();
}
return path;
}
boolean hasChildren() {
return fHasChildren;
}
protected boolean doEquals(ViewerUpdateMonitor update) {
return
update instanceof HasChildrenUpdate &&
getViewerInput().equals(update.getViewerInput()) &&
getElementPath().equals(getElementPath());
}
protected int doHashCode() {
return getClass().hashCode() + getViewerInput().hashCode() + getElementPath().hashCode();
}
}
|
