source: josm/trunk/src/org/openstreetmap/josm/gui/mappaint/ElemStyles.java@ 7014

Last change on this file since 7014 was 7014, checked in by Don-vip, 10 years ago

MapCSS: drop deprecated pattern-image support
  • Property svn:eol-style set to native
File size: 18.4 KB
Line 
1// License: GPL. For details, see LICENSE file.
2package org.openstreetmap.josm.gui.mappaint;
3
4import java.awt.Color;
5import java.util.ArrayList;
6import java.util.Collection;
7import java.util.Collections;
8import java.util.Iterator;
9import java.util.List;
10import java.util.Map.Entry;
11
12import org.openstreetmap.josm.data.osm.Node;
13import org.openstreetmap.josm.data.osm.OsmPrimitive;
14import org.openstreetmap.josm.data.osm.Relation;
15import org.openstreetmap.josm.data.osm.Way;
16import org.openstreetmap.josm.data.osm.visitor.paint.relations.Multipolygon;
17import org.openstreetmap.josm.data.osm.visitor.paint.relations.MultipolygonCache;
18import org.openstreetmap.josm.gui.NavigatableComponent;
19import org.openstreetmap.josm.gui.mappaint.StyleCache.StyleList;
20import org.openstreetmap.josm.tools.Pair;
21import org.openstreetmap.josm.tools.Utils;
22
23public class ElemStyles {
24 private List<StyleSource> styleSources;
25 private boolean drawMultipolygon;
26
27 private int cacheIdx = 1;
28
29 private boolean defaultNodes, defaultLines;
30 private int defaultNodesIdx, defaultLinesIdx;
31
32 /**
33 * Constructs a new {@code ElemStyles}.
34 */
35 public ElemStyles() {
36 styleSources = new ArrayList<>();
37 }
38
39 public void clearCached() {
40 cacheIdx++;
41 }
42
43 public List<StyleSource> getStyleSources() {
44 return Collections.<StyleSource>unmodifiableList(styleSources);
45 }
46
47 /**
48 * Create the list of styles for one primitive.
49 *
50 * @param osm the primitive
51 * @param scale the scale (in meters per 100 pixel)
52 * @param nc display component
53 * @return list of styles
54 */
55 public StyleList get(OsmPrimitive osm, double scale, NavigatableComponent nc) {
56 return getStyleCacheWithRange(osm, scale, nc).a;
57 }
58
59 /**
60 * Create the list of styles and its valid scale range for one primitive.
61 *
62 * Automatically adds default styles in case no proper style was found.
63 * Uses the cache, if possible, and saves the results to the cache.
64 */
65 public Pair<StyleList, Range> getStyleCacheWithRange(OsmPrimitive osm, double scale, NavigatableComponent nc) {
66 if (osm.mappaintStyle == null || osm.mappaintCacheIdx != cacheIdx || scale <= 0) {
67 osm.mappaintStyle = StyleCache.EMPTY_STYLECACHE;
68 } else {
69 Pair<StyleList, Range> lst = osm.mappaintStyle.getWithRange(scale);
70 if (lst.a != null)
71 return lst;
72 }
73 Pair<StyleList, Range> p = getImpl(osm, scale, nc);
74 if (osm instanceof Node && isDefaultNodes()) {
75 if (p.a.isEmpty()) {
76 if (TextElement.AUTO_LABEL_COMPOSITION_STRATEGY.compose(osm) != null) {
77 p.a = NodeElemStyle.DEFAULT_NODE_STYLELIST_TEXT;
78 } else {
79 p.a = NodeElemStyle.DEFAULT_NODE_STYLELIST;
80 }
81 } else {
82 boolean hasNonModifier = false;
83 boolean hasText = false;
84 for (ElemStyle s : p.a) {
85 if (s instanceof BoxTextElemStyle) {
86 hasText = true;
87 } else {
88 if (!s.isModifier) {
89 hasNonModifier = true;
90 }
91 }
92 }
93 if (!hasNonModifier) {
94 p.a = new StyleList(p.a, NodeElemStyle.SIMPLE_NODE_ELEMSTYLE);
95 if (!hasText) {
96 if (TextElement.AUTO_LABEL_COMPOSITION_STRATEGY.compose(osm) != null) {
97 p.a = new StyleList(p.a, BoxTextElemStyle.SIMPLE_NODE_TEXT_ELEMSTYLE);
98 }
99 }
100 }
101 }
102 } else if (osm instanceof Way && isDefaultLines()) {
103 boolean hasProperLineStyle = false;
104 for (ElemStyle s : p.a) {
105 if (s.isProperLineStyle()) {
106 hasProperLineStyle = true;
107 break;
108 }
109 }
110 if (!hasProperLineStyle) {
111 AreaElemStyle area = Utils.find(p.a, AreaElemStyle.class);
112 LineElemStyle line = area == null ? LineElemStyle.UNTAGGED_WAY : LineElemStyle.createSimpleLineStyle(area.color, true);
113 p.a = new StyleList(p.a, line);
114 }
115 }
116 StyleCache style = osm.mappaintStyle != null ? osm.mappaintStyle : StyleCache.EMPTY_STYLECACHE;
117 try {
118 osm.mappaintStyle = style.put(p.a, p.b);
119 } catch (StyleCache.RangeViolatedError e) {
120 AssertionError error = new AssertionError("Range violated. object: " + osm.getPrimitiveId() + ", current style: "+osm.mappaintStyle
121 + ", scale: " + scale + ", new stylelist: " + p.a + ", new range: " + p.b);
122 error.initCause(e);
123 throw error;
124 }
125 osm.mappaintCacheIdx = cacheIdx;
126 return p;
127 }
128
129 /**
130 * Create the list of styles and its valid scale range for one primitive.
131 *
132 * This method does multipolygon handling.
133 *
134 *
135 * There are different tagging styles for multipolygons, that have to be respected:
136 * - tags on the relation
137 * - tags on the outer way
138 * - tags on both, the outer and the inner way (very old style)
139 *
140 * If the primitive is a way, look for multipolygon parents. In case it
141 * is indeed member of some multipolygon as role "outer", all area styles
142 * are removed. (They apply to the multipolygon area.)
143 * Outer ways can have their own independent line styles, e.g. a road as
144 * boundary of a forest. Otherwise, in case, the way does not have an
145 * independent line style, take a line style from the multipolygon.
146 * If the multipolygon does not have a line style either, at least create a
147 * default line style from the color of the area.
148 *
149 * Now consider the case that the way is not an outer way of any multipolygon,
150 * but is member of a multipolygon as "inner".
151 * First, the style list is regenerated, considering only tags of this way
152 * minus the tags of outer way of the multipolygon (to care for the "very
153 * old style").
154 * Then check, if the way describes something in its own right. (linear feature
155 * or area) If not, add a default line style from the area color of the multipolygon.
156 *
157 */
158 private Pair<StyleList, Range> getImpl(OsmPrimitive osm, double scale, NavigatableComponent nc) {
159 if (osm instanceof Node)
160 return generateStyles(osm, scale, null, false);
161 else if (osm instanceof Way)
162 {
163 Pair<StyleList, Range> p = generateStyles(osm, scale, null, false);
164
165 boolean isOuterWayOfSomeMP = false;
166 Color wayColor = null;
167
168 for (OsmPrimitive referrer : osm.getReferrers()) {
169 Relation r = (Relation) referrer;
170 if (!drawMultipolygon || !r.isMultipolygon() || !r.isUsable()) {
171 continue;
172 }
173 Multipolygon multipolygon = MultipolygonCache.getInstance().get(nc, r);
174
175 if (multipolygon.getOuterWays().contains(osm)) {
176 boolean hasIndependentLineStyle = false;
177 if (!isOuterWayOfSomeMP) { // do this only one time
178 List<ElemStyle> tmp = new ArrayList<>(p.a.size());
179 for (ElemStyle s : p.a) {
180 if (s instanceof AreaElemStyle) {
181 wayColor = ((AreaElemStyle) s).color;
182 } else {
183 tmp.add(s);
184 if (s.isProperLineStyle()) {
185 hasIndependentLineStyle = true;
186 }
187 }
188 }
189 p.a = new StyleList(tmp);
190 isOuterWayOfSomeMP = true;
191 }
192
193 if (!hasIndependentLineStyle) {
194 Pair<StyleList, Range> mpElemStyles = getStyleCacheWithRange(r, scale, nc);
195 ElemStyle mpLine = null;
196 for (ElemStyle s : mpElemStyles.a) {
197 if (s.isProperLineStyle()) {
198 mpLine = s;
199 break;
200 }
201 }
202 p.b = Range.cut(p.b, mpElemStyles.b);
203 if (mpLine != null) {
204 p.a = new StyleList(p.a, mpLine);
205 break;
206 } else if (wayColor == null && isDefaultLines()) {
207 AreaElemStyle mpArea = Utils.find(mpElemStyles.a, AreaElemStyle.class);
208 if (mpArea != null) {
209 wayColor = mpArea.color;
210 }
211 }
212 }
213 }
214 }
215 if (isOuterWayOfSomeMP) {
216 if (isDefaultLines()) {
217 boolean hasLineStyle = false;
218 for (ElemStyle s : p.a) {
219 if (s.isProperLineStyle()) {
220 hasLineStyle = true;
221 break;
222 }
223 }
224 if (!hasLineStyle) {
225 p.a = new StyleList(p.a, LineElemStyle.createSimpleLineStyle(wayColor, true));
226 }
227 }
228 return p;
229 }
230
231 if (!isDefaultLines()) return p;
232
233 for (OsmPrimitive referrer : osm.getReferrers()) {
234 Relation ref = (Relation) referrer;
235 if (!drawMultipolygon || !ref.isMultipolygon() || !ref.isUsable()) {
236 continue;
237 }
238 final Multipolygon multipolygon = MultipolygonCache.getInstance().get(nc, ref);
239
240 if (multipolygon.getInnerWays().contains(osm)) {
241 Iterator<Way> it = multipolygon.getOuterWays().iterator();
242 p = generateStyles(osm, scale, it.hasNext() ? it.next() : null, false);
243 boolean hasIndependentElemStyle = false;
244 for (ElemStyle s : p.a) {
245 if (s.isProperLineStyle() || s instanceof AreaElemStyle) {
246 hasIndependentElemStyle = true;
247 break;
248 }
249 }
250 if (!hasIndependentElemStyle && !multipolygon.getOuterWays().isEmpty()) {
251 StyleList mpElemStyles = get(ref, scale, nc);
252 Color mpColor = null;
253 for (ElemStyle mpS : mpElemStyles) {
254 if (mpS instanceof AreaElemStyle) {
255 mpColor = ((AreaElemStyle) mpS).color;
256 break;
257 }
258 }
259 p.a = new StyleList(p.a, LineElemStyle.createSimpleLineStyle(mpColor, true));
260 }
261 return p;
262 }
263 }
264 return p;
265 }
266 else if (osm instanceof Relation)
267 {
268 Pair<StyleList, Range> p = generateStyles(osm, scale, null, true);
269 if (drawMultipolygon && ((Relation)osm).isMultipolygon()) {
270 if (!Utils.exists(p.a, AreaElemStyle.class)) {
271 // look at outer ways to find area style
272 Multipolygon multipolygon = MultipolygonCache.getInstance().get(nc, (Relation) osm);
273 for (Way w : multipolygon.getOuterWays()) {
274 Pair<StyleList, Range> wayStyles = generateStyles(w, scale, null, false);
275 p.b = Range.cut(p.b, wayStyles.b);
276 ElemStyle area = Utils.find(wayStyles.a, AreaElemStyle.class);
277 if (area != null) {
278 p.a = new StyleList(p.a, area);
279 break;
280 }
281 }
282 }
283 }
284 return p;
285 }
286 return null;
287 }
288
289 /**
290 * Create the list of styles and its valid scale range for one primitive.
291 *
292 * Loops over the list of style sources, to generate the map of properties.
293 * From these properties, it generates the different types of styles.
294 *
295 * @param osm the primitive to create styles for
296 * @param scale the scale (in meters per 100 px), must be &gt; 0
297 * @param multipolyOuterWay support for a very old multipolygon tagging style
298 * where you add the tags both to the outer and the inner way.
299 * However, independent inner way style is also possible.
300 * @param pretendWayIsClosed For styles that require the way to be closed,
301 * we pretend it is. This is useful for generating area styles from the (segmented)
302 * outer ways of a multipolygon.
303 * @return the generated styles and the valid range as a pair
304 */
305 public Pair<StyleList, Range> generateStyles(OsmPrimitive osm, double scale, OsmPrimitive multipolyOuterWay, boolean pretendWayIsClosed) {
306
307 List<ElemStyle> sl = new ArrayList<>();
308 MultiCascade mc = new MultiCascade();
309 Environment env = new Environment(osm, mc, null, null);
310
311 for (StyleSource s : styleSources) {
312 if (s.active) {
313 s.apply(mc, osm, scale, multipolyOuterWay, pretendWayIsClosed);
314 }
315 }
316
317 for (Entry<String, Cascade> e : mc.getLayers()) {
318 if ("*".equals(e.getKey())) {
319 continue;
320 }
321 env.layer = e.getKey();
322 Cascade c = e.getValue();
323 if (osm instanceof Way) {
324 addIfNotNull(sl, AreaElemStyle.create(c));
325 addIfNotNull(sl, RepeatImageElemStyle.create(env));
326 addIfNotNull(sl, LineElemStyle.createLine(env));
327 addIfNotNull(sl, LineElemStyle.createLeftCasing(env));
328 addIfNotNull(sl, LineElemStyle.createRightCasing(env));
329 addIfNotNull(sl, LineElemStyle.createCasing(env));
330 addIfNotNull(sl, LineTextElemStyle.create(env));
331 } else if (osm instanceof Node) {
332 NodeElemStyle nodeStyle = NodeElemStyle.create(env);
333 if (nodeStyle != null) {
334 sl.add(nodeStyle);
335 addIfNotNull(sl, BoxTextElemStyle.create(env, nodeStyle.getBoxProvider()));
336 } else {
337 addIfNotNull(sl, BoxTextElemStyle.create(env, NodeElemStyle.SIMPLE_NODE_ELEMSTYLE.getBoxProvider()));
338 }
339 } else if (osm instanceof Relation) {
340 if (((Relation)osm).isMultipolygon()) {
341 addIfNotNull(sl, AreaElemStyle.create(c));
342 addIfNotNull(sl, RepeatImageElemStyle.create(env));
343 addIfNotNull(sl, LineElemStyle.createLine(env));
344 addIfNotNull(sl, LineElemStyle.createCasing(env));
345 addIfNotNull(sl, LineTextElemStyle.create(env));
346 } else if ("restriction".equals(osm.get("type"))) {
347 addIfNotNull(sl, NodeElemStyle.create(env));
348 }
349 }
350 }
351 return new Pair<>(new StyleList(sl), mc.range);
352 }
353
354 private static <T> void addIfNotNull(List<T> list, T obj) {
355 if (obj != null) {
356 list.add(obj);
357 }
358 }
359
360 /**
361 * Draw a default node symbol for nodes that have no style?
362 */
363 private boolean isDefaultNodes() {
364 if (defaultNodesIdx == cacheIdx)
365 return defaultNodes;
366 defaultNodes = fromCanvas("default-points", true, Boolean.class);
367 defaultNodesIdx = cacheIdx;
368 return defaultNodes;
369 }
370
371 /**
372 * Draw a default line for ways that do not have an own line style?
373 */
374 private boolean isDefaultLines() {
375 if (defaultLinesIdx == cacheIdx)
376 return defaultLines;
377 defaultLines = fromCanvas("default-lines", true, Boolean.class);
378 defaultLinesIdx = cacheIdx;
379 return defaultLines;
380 }
381
382 private <T> T fromCanvas(String key, T def, Class<T> c) {
383 MultiCascade mc = new MultiCascade();
384 Relation r = new Relation();
385 r.put("#canvas", "query");
386
387 for (StyleSource s : styleSources) {
388 if (s.active) {
389 s.apply(mc, r, 1, null, false);
390 }
391 }
392 return mc.getCascade("default").get(key, def, c);
393 }
394
395 public boolean isDrawMultipolygon() {
396 return drawMultipolygon;
397 }
398
399 public void setDrawMultipolygon(boolean drawMultipolygon) {
400 this.drawMultipolygon = drawMultipolygon;
401 }
402
403 /**
404 * remove all style sources; only accessed from MapPaintStyles
405 */
406 void clear() {
407 styleSources.clear();
408 }
409
410 /**
411 * add a style source; only accessed from MapPaintStyles
412 */
413 void add(StyleSource style) {
414 styleSources.add(style);
415 }
416
417 /**
418 * set the style sources; only accessed from MapPaintStyles
419 */
420 void setStyleSources(Collection<StyleSource> sources) {
421 styleSources.clear();
422 styleSources.addAll(sources);
423 }
424
425 /**
426 * Returns the first AreaElemStyle for a given primitive.
427 * @param p the OSM primitive
428 * @param pretendWayIsClosed For styles that require the way to be closed,
429 * we pretend it is. This is useful for generating area styles from the (segmented)
430 * outer ways of a multipolygon.
431 * @return first AreaElemStyle found or {@code null}.
432 */
433 public static AreaElemStyle getAreaElemStyle(OsmPrimitive p, boolean pretendWayIsClosed) {
434 if (MapPaintStyles.getStyles() == null)
435 return null;
436 for (ElemStyle s : MapPaintStyles.getStyles().generateStyles(p, 1.0, null, pretendWayIsClosed).a) {
437 if (s instanceof AreaElemStyle)
438 return (AreaElemStyle) s;
439 }
440 return null;
441 }
442
443 /**
444 * Determines whether primitive has an AreaElemStyle.
445 * @param p the OSM primitive
446 * @param pretendWayIsClosed For styles that require the way to be closed,
447 * we pretend it is. This is useful for generating area styles from the (segmented)
448 * outer ways of a multipolygon.
449 * @return {@code true} if primitive has an AreaElemStyle
450 */
451 public static boolean hasAreaElemStyle(OsmPrimitive p, boolean pretendWayIsClosed) {
452 return getAreaElemStyle(p, pretendWayIsClosed) != null;
453 }
454}
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