Skip to main content
aboutsummaryrefslogtreecommitdiffstats
blob: 6429a69e97fb518f5dac5689baeb5ad9d995e32b (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
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
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
/*******************************************************************************
 * Copyright (c) 2006, 2012 IBM Corporation and others.
 *
 * This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * 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 org.eclipse.debug.internal.ui.DebugUIPlugin;
import org.eclipse.debug.internal.ui.viewers.model.provisional.IChildrenUpdate;
import org.eclipse.debug.internal.ui.viewers.model.provisional.IElementContentProvider;
import org.eclipse.jface.viewers.TreePath;

/**
 * This class is public so the test suite has access - it should be default protection.
 *
 * @since 3.3
 */
public class ChildrenUpdate extends ViewerUpdateMonitor implements IChildrenUpdate {

	private Object[] fElements;
	private int fIndex;
	private int fLength;

	/**
	 * 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 index the index of the element
	 * @param elementContentProvider the content provider for the element
	 */
	public ChildrenUpdate(TreeModelContentProvider provider, Object viewerInput, TreePath elementPath, Object element, int index, IElementContentProvider elementContentProvider) {
		super(provider, viewerInput, elementPath, element, elementContentProvider, provider.getPresentationContext());
		fIndex = index;
		fLength = 1;
	}

	public ChildrenUpdate(TreeModelContentProvider provider, Object viewerInput, TreePath elementPath, Object element, int index, int length, IElementContentProvider elementContentProvider) {
		super(provider, viewerInput, elementPath, element, elementContentProvider, provider.getPresentationContext());
		fIndex = index;
		fLength = length;
	}


	protected void performUpdate(boolean updateFilterOnly) {
		TreeModelContentProvider provider = getContentProvider();
		TreePath elementPath = getElementPath();
		if (fElements != null) {
			IInternalTreeModelViewer viewer = provider.getViewer();
			for (int i = 0; i < fElements.length; i++) {
				int modelIndex = fIndex + i;
				Object element = fElements[i];
				if (element != null) {
					int viewIndex = provider.modelToViewIndex(elementPath, modelIndex);
					if (provider.shouldFilter(elementPath, element)) {
						if (provider.addFilteredIndex(elementPath, modelIndex, element)) {
                            if (!updateFilterOnly) {
                                if (DebugUIPlugin.DEBUG_CONTENT_PROVIDER && DebugUIPlugin.DEBUG_TEST_PRESENTATION_ID(getPresentationContext())) {
                                	DebugUIPlugin.trace("REMOVE(" + getElement() + ", modelIndex: " + modelIndex + " viewIndex: " + viewIndex + ", " + element + ")"); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ //$NON-NLS-4$ //$NON-NLS-5$
    							}
							    viewer.remove(elementPath, viewIndex);
                            }
						}
					} else {
						if (provider.isFiltered(elementPath, modelIndex)) {
							provider.clearFilteredChild(elementPath, modelIndex);
                            if (!updateFilterOnly) {
								int insertIndex = provider.modelToViewIndex(elementPath, modelIndex);
								if (DebugUIPlugin.DEBUG_CONTENT_PROVIDER) {
									DebugUIPlugin.trace("insert(" + getElement() + ", modelIndex: " + modelIndex + " insertIndex: " + insertIndex + ", " + element + ")"); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ //$NON-NLS-4$ //$NON-NLS-5$
								}
								viewer.insert(elementPath, element, insertIndex);
                            }
						} else if (!updateFilterOnly){
		                    if (DebugUIPlugin.DEBUG_CONTENT_PROVIDER && DebugUIPlugin.DEBUG_TEST_PRESENTATION_ID(getPresentationContext())) {
		                    	DebugUIPlugin.trace("replace(" + getElement() + ", modelIndex: " + modelIndex + " viewIndex: " + viewIndex + ", " + element + ")"); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ //$NON-NLS-4$ //$NON-NLS-5$
							}
							viewer.replace(elementPath, viewIndex, element);
						}
						if (!updateFilterOnly) {
							TreePath childPath = elementPath.createChildPath(element);
							provider.updateHasChildren(childPath);
							provider.getStateTracker().restorePendingStateOnUpdate(childPath, modelIndex, false, false, false);
						}
					}
				}
			}

			if (!updateFilterOnly) {
				provider.getStateTracker().restorePendingStateOnUpdate(elementPath, -1, true, true, true);
			}
		} else if (!updateFilterOnly) {
			provider.updateHasChildren(elementPath);
		}

	}

	@Override
	protected void performUpdate() {
		performUpdate(false);
	}

	@Override
	public void setChild(Object child, int index) {
		if (fElements == null) {
			fElements = new Object[fLength];
		}
		fElements[index - fIndex] = child;
	}

	/*
	 * This method is public so the test suite has access - it should be default
	 * protection.
	 */
	@Override
	public synchronized boolean coalesce(ViewerUpdateMonitor request) {
		if (request instanceof ChildrenUpdate) {
			ChildrenUpdate cu = (ChildrenUpdate) request;
			if (getElement().equals(cu.getElement()) && getElementPath().equals(cu.getElementPath())) {
				int end = fIndex + fLength;
				int otherStart = cu.getOffset();
				int otherEnd = otherStart + cu.getLength();
				if ((otherStart >= fIndex && otherStart <= end) || (otherEnd >= fIndex && otherEnd <= end)) {
					// overlap
					fIndex = Math.min(fIndex, otherStart);
					end = Math.max(end, otherEnd);
					fLength = end - fIndex;
					if (DebugUIPlugin.DEBUG_CONTENT_PROVIDER && DebugUIPlugin.DEBUG_TEST_PRESENTATION_ID(getPresentationContext())) {
						DebugUIPlugin.trace("coalesced: " + this.toString()); //$NON-NLS-1$
					}
					return true;
				}
			}
		}
		return false;
	}

	@Override
	boolean containsUpdate(TreePath path) {
        return getElementPath().equals(path);
    }

	@Override
	public int getLength() {
		return fLength;
	}

	@Override
	public int getOffset() {
		return fIndex;
	}

	@Override
	void startRequest() {
		getElementContentProvider().update(new IChildrenUpdate[]{this});
	}

	@Override
	public String toString() {
		StringBuffer buf = new StringBuffer();
		buf.append("IChildrenUpdate: "); //$NON-NLS-1$
		buf.append(getElement());
		buf.append(" {"); //$NON-NLS-1$
		buf.append(getOffset());
		buf.append("->"); //$NON-NLS-1$
		buf.append(getOffset() + getLength() - 1);
		buf.append("}"); //$NON-NLS-1$
		return buf.toString();
	}

	@Override
	int getPriority() {
		return 3;
	}

	@Override
	TreePath getSchedulingPath() {
		return getElementPath();
	}

	/**
	 * Sets this request's offset. Used when modifying a waiting request when
	 * the offset changes due to a removed element.
	 *
	 * @param offset new offset
	 */
	void setOffset(int offset) {
		fIndex = offset;
	}

	Object[] getElements() {
	    return fElements;
	}

    @Override
	protected boolean doEquals(ViewerUpdateMonitor update) {
        return
            update instanceof ChildrenUpdate &&
            ((ChildrenUpdate)update).getOffset() == getOffset() &&
            ((ChildrenUpdate)update).getLength() == getLength() &&
            getViewerInput().equals(update.getViewerInput()) &&
            getElementPath().equals(update.getElementPath());
    }

    @Override
	protected int doHashCode() {
        return (int)Math.pow(
            (getClass().hashCode() + getViewerInput().hashCode() + getElementPath().hashCode()) * (getOffset() + 2),
            getLength() + 2);
    }

}

Back to the top