1 | // License: GPL. For details, see LICENSE file.
|
---|
2 | package org.openstreetmap.josm.data.osm;
|
---|
3 |
|
---|
4 | import java.util.Collections;
|
---|
5 | import java.util.HashSet;
|
---|
6 | import java.util.Set;
|
---|
7 | import java.util.stream.Collectors;
|
---|
8 | import java.util.stream.Stream;
|
---|
9 |
|
---|
10 | import org.openstreetmap.josm.tools.CheckParameterUtil;
|
---|
11 |
|
---|
12 | /**
|
---|
13 | * This is a listener that listens to selection change events in the data set.
|
---|
14 | * @author Michael Zangl
|
---|
15 | * @since 12048
|
---|
16 | */
|
---|
17 | @FunctionalInterface
|
---|
18 | public interface DataSelectionListener {
|
---|
19 |
|
---|
20 | /**
|
---|
21 | * Called whenever the selection is changed.
|
---|
22 | * @param e The selection change event.
|
---|
23 | */
|
---|
24 | void selectionChanged(SelectionChangeEvent e);
|
---|
25 |
|
---|
26 | /**
|
---|
27 | * The event that is fired when the selection changed.
|
---|
28 | * @author Michael Zangl
|
---|
29 | * @since 12048
|
---|
30 | */
|
---|
31 | public interface SelectionChangeEvent {
|
---|
32 | /**
|
---|
33 | * Gets the previous selection
|
---|
34 | * <p>
|
---|
35 | * This collection cannot be modified and will not change.
|
---|
36 | * @return The old selection
|
---|
37 | */
|
---|
38 | Set<OsmPrimitive> getOldSelection();
|
---|
39 |
|
---|
40 | /**
|
---|
41 | * Gets the new selection
|
---|
42 | * <p>
|
---|
43 | * This collection cannot be modified and will not change.
|
---|
44 | * @return The new selection
|
---|
45 | */
|
---|
46 | Set<OsmPrimitive> getSelection();
|
---|
47 |
|
---|
48 | /**
|
---|
49 | * Gets the primitives that have been removed from the selection.
|
---|
50 | * <p>
|
---|
51 | * Those are the primitives contained in {@link #getOldSelection()} but not in {@link #getSelection()}
|
---|
52 | * <p>
|
---|
53 | * This collection cannot be modified and will not change.
|
---|
54 | * @return The primitives
|
---|
55 | */
|
---|
56 | Set<OsmPrimitive> getRemoved();
|
---|
57 |
|
---|
58 | /**
|
---|
59 | * Gets the primitives that have been added to the selection.
|
---|
60 | * <p>
|
---|
61 | * Those are the primitives contained in {@link #getSelection()} but not in {@link #getOldSelection()}
|
---|
62 | * <p>
|
---|
63 | * This collection cannot be modified and will not change.
|
---|
64 | * @return The primitives
|
---|
65 | */
|
---|
66 | Set<OsmPrimitive> getAdded();
|
---|
67 |
|
---|
68 | /**
|
---|
69 | * Gets the data set that triggered this selection event.
|
---|
70 | * @return The data set.
|
---|
71 | */
|
---|
72 | DataSet getSource();
|
---|
73 |
|
---|
74 | /**
|
---|
75 | * Test if this event did not change anything.
|
---|
76 | * <p>
|
---|
77 | * Should return true for all events that are fired.
|
---|
78 | * @return <code>true</code> if this did not change the selection.
|
---|
79 | */
|
---|
80 | default boolean isNop() {
|
---|
81 | return getAdded().isEmpty() && getRemoved().isEmpty();
|
---|
82 | }
|
---|
83 | }
|
---|
84 |
|
---|
85 | /**
|
---|
86 | * The base class for selection events
|
---|
87 | * @author Michael Zangl
|
---|
88 | * @since 12048
|
---|
89 | */
|
---|
90 | abstract class AbstractSelectionEvent implements SelectionChangeEvent {
|
---|
91 | private final DataSet source;
|
---|
92 | private final Set<OsmPrimitive> old;
|
---|
93 |
|
---|
94 | public AbstractSelectionEvent(DataSet source, Set<OsmPrimitive> old) {
|
---|
95 | CheckParameterUtil.ensureParameterNotNull(source, "source");
|
---|
96 | CheckParameterUtil.ensureParameterNotNull(old, "old");
|
---|
97 | this.source = source;
|
---|
98 | this.old = Collections.unmodifiableSet(old);
|
---|
99 | }
|
---|
100 |
|
---|
101 | @Override
|
---|
102 | public Set<OsmPrimitive> getOldSelection() {
|
---|
103 | return old;
|
---|
104 | }
|
---|
105 |
|
---|
106 | @Override
|
---|
107 | public DataSet getSource() {
|
---|
108 | return source;
|
---|
109 | }
|
---|
110 | }
|
---|
111 |
|
---|
112 |
|
---|
113 | /**
|
---|
114 | * The selection is replaced by a new selection
|
---|
115 | * @author Michael Zangl
|
---|
116 | * @since 12048
|
---|
117 | */
|
---|
118 | class SelectionReplaceEvent extends AbstractSelectionEvent {
|
---|
119 | private final Set<OsmPrimitive> current;
|
---|
120 | private Set<OsmPrimitive> removed;
|
---|
121 | private Set<OsmPrimitive> added;
|
---|
122 |
|
---|
123 | /**
|
---|
124 | * Create a {@link SelectionReplaceEvent}
|
---|
125 | * @param source The source dataset
|
---|
126 | * @param old The old primitves that were previously selected. The caller needs to ensure that this set is not modifed.
|
---|
127 | * @param newSelection The primitives of the new selection.
|
---|
128 | */
|
---|
129 | public SelectionReplaceEvent(DataSet source, Set<OsmPrimitive> old, Stream<OsmPrimitive> newSelection) {
|
---|
130 | super(source, old);
|
---|
131 | this.current = newSelection.collect(Collectors.toSet());
|
---|
132 | }
|
---|
133 |
|
---|
134 | @Override
|
---|
135 | public Set<OsmPrimitive> getSelection() {
|
---|
136 | return current;
|
---|
137 | }
|
---|
138 |
|
---|
139 | @Override
|
---|
140 | public synchronized Set<OsmPrimitive> getRemoved() {
|
---|
141 | if (removed == null) {
|
---|
142 | removed = getOldSelection().stream().filter(p -> !current.contains(p)).collect(Collectors.toSet());
|
---|
143 | }
|
---|
144 | return removed;
|
---|
145 | }
|
---|
146 |
|
---|
147 | @Override
|
---|
148 | public synchronized Set<OsmPrimitive> getAdded() {
|
---|
149 | if (added == null) {
|
---|
150 | added = current.stream().filter(p -> !getOldSelection().contains(p)).collect(Collectors.toSet());
|
---|
151 | }
|
---|
152 | return added;
|
---|
153 | }
|
---|
154 | }
|
---|
155 |
|
---|
156 | /**
|
---|
157 | * Primitives are added to the selection
|
---|
158 | * @author Michael Zangl
|
---|
159 | * @since 12048
|
---|
160 | */
|
---|
161 | class SelectionAddEvent extends AbstractSelectionEvent {
|
---|
162 | private final Set<OsmPrimitive> add;
|
---|
163 | private final Set<OsmPrimitive> current;
|
---|
164 |
|
---|
165 | /**
|
---|
166 | * Create a {@link SelectionAddEvent}
|
---|
167 | * @param source The source dataset
|
---|
168 | * @param old The old primitves that were previously selected. The caller needs to ensure that this set is not modifed.
|
---|
169 | * @param toAdd The primitives to add.
|
---|
170 | */
|
---|
171 | public SelectionAddEvent(DataSet source, Set<OsmPrimitive> old, Stream<OsmPrimitive> toAdd) {
|
---|
172 | super(source, old);
|
---|
173 | this.add = toAdd.filter(p -> !old.contains(p)).collect(Collectors.toSet());
|
---|
174 | if (this.add.isEmpty()) {
|
---|
175 | this.current = this.getOldSelection();
|
---|
176 | } else {
|
---|
177 | this.current = new HashSet<>(old);
|
---|
178 | this.current.addAll(add);
|
---|
179 | }
|
---|
180 | }
|
---|
181 |
|
---|
182 | @Override
|
---|
183 | public Set<OsmPrimitive> getSelection() {
|
---|
184 | return Collections.unmodifiableSet(current);
|
---|
185 | }
|
---|
186 |
|
---|
187 | @Override
|
---|
188 | public Set<OsmPrimitive> getRemoved() {
|
---|
189 | return Collections.emptySet();
|
---|
190 | }
|
---|
191 |
|
---|
192 | @Override
|
---|
193 | public Set<OsmPrimitive> getAdded() {
|
---|
194 | return Collections.unmodifiableSet(add);
|
---|
195 | }
|
---|
196 | }
|
---|
197 |
|
---|
198 | /**
|
---|
199 | * Primitives are removed from the selection
|
---|
200 | * @author Michael Zangl
|
---|
201 | * @since 12048
|
---|
202 | */
|
---|
203 | class SelectionRemoveEvent extends AbstractSelectionEvent {
|
---|
204 | private final Set<OsmPrimitive> remove;
|
---|
205 | private final Set<OsmPrimitive> current;
|
---|
206 |
|
---|
207 | /**
|
---|
208 | * Create a {@link SelectionRemoveEvent}
|
---|
209 | * @param source The source dataset
|
---|
210 | * @param old The old primitves that were previously selected. The caller needs to ensure that this set is not modifed.
|
---|
211 | * @param toRemove The primitives to remove.
|
---|
212 | */
|
---|
213 | public SelectionRemoveEvent(DataSet source, Set<OsmPrimitive> old, Stream<OsmPrimitive> toRemove) {
|
---|
214 | super(source, old);
|
---|
215 | this.remove = toRemove.filter(old::contains).collect(Collectors.toSet());
|
---|
216 | if (this.remove.isEmpty()) {
|
---|
217 | this.current = this.getOldSelection();
|
---|
218 | } else {
|
---|
219 | HashSet<OsmPrimitive> currentSet = new HashSet<>(old);
|
---|
220 | currentSet.removeAll(remove);
|
---|
221 | current = Collections.unmodifiableSet(currentSet);
|
---|
222 | }
|
---|
223 | }
|
---|
224 |
|
---|
225 | @Override
|
---|
226 | public Set<OsmPrimitive> getSelection() {
|
---|
227 | return Collections.unmodifiableSet(current);
|
---|
228 | }
|
---|
229 |
|
---|
230 | @Override
|
---|
231 | public Set<OsmPrimitive> getRemoved() {
|
---|
232 | return Collections.unmodifiableSet(remove);
|
---|
233 | }
|
---|
234 |
|
---|
235 | @Override
|
---|
236 | public Set<OsmPrimitive> getAdded() {
|
---|
237 | return Collections.emptySet();
|
---|
238 | }
|
---|
239 | }
|
---|
240 |
|
---|
241 | /**
|
---|
242 | * Toggle the selected state of a primitive
|
---|
243 | * @author Michael Zangl
|
---|
244 | * @since 12048
|
---|
245 | */
|
---|
246 | class SelectionToggleEvent extends AbstractSelectionEvent {
|
---|
247 | private final Set<OsmPrimitive> current;
|
---|
248 | private final Set<OsmPrimitive> remove;
|
---|
249 | private final Set<OsmPrimitive> add;
|
---|
250 |
|
---|
251 | /**
|
---|
252 | * Create a {@link SelectionToggleEvent}
|
---|
253 | * @param source The source dataset
|
---|
254 | * @param old The old primitves that were previously selected. The caller needs to ensure that this set is not modifed.
|
---|
255 | * @param toToggle The primitives to toggle.
|
---|
256 | */
|
---|
257 | public SelectionToggleEvent(DataSet source, Set<OsmPrimitive> old, Stream<OsmPrimitive> toToggle) {
|
---|
258 | super(source, old);
|
---|
259 | HashSet<OsmPrimitive> currentSet = new HashSet<>(old);
|
---|
260 | HashSet<OsmPrimitive> removeSet = new HashSet<>();
|
---|
261 | HashSet<OsmPrimitive> addSet = new HashSet<>();
|
---|
262 | toToggle.forEach(p -> {
|
---|
263 | if (currentSet.remove(p)) {
|
---|
264 | removeSet.add(p);
|
---|
265 | } else {
|
---|
266 | addSet.add(p);
|
---|
267 | currentSet.add(p);
|
---|
268 | }
|
---|
269 | });
|
---|
270 | this.current = Collections.unmodifiableSet(currentSet);
|
---|
271 | this.remove = Collections.unmodifiableSet(removeSet);
|
---|
272 | this.add = Collections.unmodifiableSet(addSet);
|
---|
273 | }
|
---|
274 |
|
---|
275 | @Override
|
---|
276 | public Set<OsmPrimitive> getSelection() {
|
---|
277 | return Collections.unmodifiableSet(current);
|
---|
278 | }
|
---|
279 |
|
---|
280 | @Override
|
---|
281 | public Set<OsmPrimitive> getRemoved() {
|
---|
282 | return Collections.unmodifiableSet(remove);
|
---|
283 | }
|
---|
284 |
|
---|
285 | @Override
|
---|
286 | public Set<OsmPrimitive> getAdded() {
|
---|
287 | return Collections.unmodifiableSet(add);
|
---|
288 | }
|
---|
289 | }
|
---|
290 | }
|
---|