1 | // License: GPL. For details, see LICENSE file.
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2 | package org.openstreetmap.josm.gui.mappaint;
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3 |
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4 | import java.awt.Color;
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5 | import java.util.ArrayList;
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6 | import java.util.Collection;
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7 | import java.util.Collections;
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8 | import java.util.HashMap;
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9 | import java.util.List;
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10 | import java.util.Map;
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11 | import java.util.Map.Entry;
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12 |
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13 | import org.openstreetmap.josm.Main;
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14 | import org.openstreetmap.josm.data.Preferences.PreferenceChangeEvent;
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15 | import org.openstreetmap.josm.data.Preferences.PreferenceChangedListener;
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16 | import org.openstreetmap.josm.data.osm.Node;
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17 | import org.openstreetmap.josm.data.osm.OsmPrimitive;
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18 | import org.openstreetmap.josm.data.osm.Relation;
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19 | import org.openstreetmap.josm.data.osm.Way;
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20 | import org.openstreetmap.josm.data.osm.visitor.paint.relations.Multipolygon;
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21 | import org.openstreetmap.josm.data.osm.visitor.paint.relations.MultipolygonCache;
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22 | import org.openstreetmap.josm.gui.NavigatableComponent;
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23 | import org.openstreetmap.josm.gui.mappaint.DividedScale.RangeViolatedError;
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24 | import org.openstreetmap.josm.gui.mappaint.mapcss.MapCSSStyleSource;
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25 | import org.openstreetmap.josm.gui.mappaint.styleelement.AreaElement;
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26 | import org.openstreetmap.josm.gui.mappaint.styleelement.AreaIconElement;
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27 | import org.openstreetmap.josm.gui.mappaint.styleelement.BoxTextElement;
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28 | import org.openstreetmap.josm.gui.mappaint.styleelement.LineElement;
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29 | import org.openstreetmap.josm.gui.mappaint.styleelement.NodeElement;
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30 | import org.openstreetmap.josm.gui.mappaint.styleelement.RepeatImageElement;
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31 | import org.openstreetmap.josm.gui.mappaint.styleelement.StyleElement;
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32 | import org.openstreetmap.josm.gui.mappaint.styleelement.TextElement;
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33 | import org.openstreetmap.josm.gui.mappaint.styleelement.TextLabel;
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34 | import org.openstreetmap.josm.gui.util.GuiHelper;
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35 | import org.openstreetmap.josm.tools.Pair;
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36 | import org.openstreetmap.josm.tools.Utils;
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37 |
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38 | /**
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39 | * Generates a list of {@link StyleElement}s for a primitive, to
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40 | * be drawn on the map.
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41 | * There are several steps to derive the list of elements for display:
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42 | * <ol>
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43 | * <li>{@link #generateStyles(OsmPrimitive, double, boolean)} applies the
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44 | * {@link StyleSource}s one after another to get a key-value map of MapCSS
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45 | * properties. Then a preliminary set of StyleElements is derived from the
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46 | * properties map.</li>
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47 | * <li>{@link #getImpl(OsmPrimitive, double, NavigatableComponent)} handles the
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48 | * different forms of multipolygon tagging.</li>
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49 | * <li>{@link #getStyleCacheWithRange(OsmPrimitive, double, NavigatableComponent)}
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50 | * adds a default StyleElement for primitives that would be invisible otherwise.
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51 | * (For example untagged nodes and ways.)</li>
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52 | * </ol>
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53 | * The results are cached with respect to the current scale.
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54 | *
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55 | * Use {@link #setStyleSources(Collection)} to select the StyleSources that are applied.
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56 | */
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57 | public class ElemStyles implements PreferenceChangedListener {
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58 | private final List<StyleSource> styleSources;
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59 | private boolean drawMultipolygon;
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60 |
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61 | private short cacheIdx = 1;
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62 |
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63 | private boolean defaultNodes;
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64 | private boolean defaultLines;
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65 |
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66 | private short defaultNodesIdx;
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67 | private short defaultLinesIdx;
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68 |
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69 | private final Map<String, String> preferenceCache = new HashMap<>();
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70 |
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71 | /**
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72 | * Constructs a new {@code ElemStyles}.
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73 | */
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74 | public ElemStyles() {
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75 | styleSources = new ArrayList<>();
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76 | Main.pref.addPreferenceChangeListener(this);
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77 | }
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78 |
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79 | /**
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80 | * Clear the style cache for all primitives of all DataSets.
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81 | */
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82 | public void clearCached() {
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83 | // run in EDT to make sure this isn't called during rendering run
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84 | GuiHelper.runInEDT(() -> {
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85 | cacheIdx++;
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86 | preferenceCache.clear();
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87 | });
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88 | }
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89 |
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90 | /**
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91 | * Returns the list of style sources.
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92 | * @return the list of style sources
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93 | */
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94 | public List<StyleSource> getStyleSources() {
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95 | return Collections.<StyleSource>unmodifiableList(styleSources);
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96 | }
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97 |
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98 | /**
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99 | * Create the list of styles for one primitive.
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100 | *
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101 | * @param osm the primitive
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102 | * @param scale the scale (in meters per 100 pixel)
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103 | * @param nc display component
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104 | * @return list of styles
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105 | */
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106 | public StyleElementList get(OsmPrimitive osm, double scale, NavigatableComponent nc) {
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107 | return getStyleCacheWithRange(osm, scale, nc).a;
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108 | }
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109 |
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110 | /**
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111 | * Create the list of styles and its valid scale range for one primitive.
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112 | *
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113 | * Automatically adds default styles in case no proper style was found.
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114 | * Uses the cache, if possible, and saves the results to the cache.
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115 | * @param osm OSM primitive
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116 | * @param scale scale
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117 | * @param nc navigatable component
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118 | * @return pair containing style list and range
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119 | */
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120 | public Pair<StyleElementList, Range> getStyleCacheWithRange(OsmPrimitive osm, double scale, NavigatableComponent nc) {
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121 | if (osm.mappaintStyle == null || osm.getMappaintCacheIdx() != cacheIdx || scale <= 0) {
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122 | osm.mappaintStyle = StyleCache.EMPTY_STYLECACHE;
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123 | } else {
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124 | Pair<StyleElementList, Range> lst = osm.mappaintStyle.getWithRange(scale, osm.isSelected());
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125 | if (lst.a != null)
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126 | return lst;
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127 | }
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128 | Pair<StyleElementList, Range> p = getImpl(osm, scale, nc);
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129 | if (osm instanceof Node && isDefaultNodes()) {
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130 | if (p.a.isEmpty()) {
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131 | if (TextLabel.AUTO_LABEL_COMPOSITION_STRATEGY.compose(osm) != null) {
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132 | p.a = NodeElement.DEFAULT_NODE_STYLELIST_TEXT;
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133 | } else {
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134 | p.a = NodeElement.DEFAULT_NODE_STYLELIST;
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135 | }
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136 | } else {
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137 | boolean hasNonModifier = false;
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138 | boolean hasText = false;
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139 | for (StyleElement s : p.a) {
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140 | if (s instanceof BoxTextElement) {
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141 | hasText = true;
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142 | } else {
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143 | if (!s.isModifier) {
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144 | hasNonModifier = true;
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145 | }
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146 | }
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147 | }
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148 | if (!hasNonModifier) {
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149 | p.a = new StyleElementList(p.a, NodeElement.SIMPLE_NODE_ELEMSTYLE);
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150 | if (!hasText && TextLabel.AUTO_LABEL_COMPOSITION_STRATEGY.compose(osm) != null) {
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151 | p.a = new StyleElementList(p.a, BoxTextElement.SIMPLE_NODE_TEXT_ELEMSTYLE);
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152 | }
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153 | }
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154 | }
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155 | } else if (osm instanceof Way && isDefaultLines()) {
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156 | boolean hasProperLineStyle = false;
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157 | for (StyleElement s : p.a) {
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158 | if (s.isProperLineStyle()) {
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159 | hasProperLineStyle = true;
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160 | break;
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161 | }
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162 | }
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163 | if (!hasProperLineStyle) {
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164 | AreaElement area = Utils.find(p.a, AreaElement.class);
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165 | LineElement line = area == null ? LineElement.UNTAGGED_WAY : LineElement.createSimpleLineStyle(area.color, true);
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166 | p.a = new StyleElementList(p.a, line);
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167 | }
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168 | }
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169 | StyleCache style = osm.mappaintStyle != null ? osm.mappaintStyle : StyleCache.EMPTY_STYLECACHE;
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170 | try {
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171 | osm.mappaintStyle = style.put(p.a, p.b, osm.isSelected());
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172 | } catch (RangeViolatedError e) {
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173 | throw new AssertionError("Range violated: " + e.getMessage()
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174 | + " (object: " + osm.getPrimitiveId() + ", current style: "+osm.mappaintStyle
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175 | + ", scale: " + scale + ", new stylelist: " + p.a + ", new range: " + p.b + ')', e);
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176 | }
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177 | osm.setMappaintCacheIdx(cacheIdx);
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178 | return p;
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179 | }
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180 |
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181 | /**
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182 | * Create the list of styles and its valid scale range for one primitive.
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183 | *
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184 | * This method does multipolygon handling.
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185 | *
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186 | * There are different tagging styles for multipolygons, that have to be respected:
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187 | * - tags on the relation
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188 | * - tags on the outer way (deprecated)
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189 | *
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190 | * If the primitive is a way, look for multipolygon parents. In case it
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191 | * is indeed member of some multipolygon as role "outer", all area styles
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192 | * are removed. (They apply to the multipolygon area.)
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193 | * Outer ways can have their own independent line styles, e.g. a road as
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194 | * boundary of a forest. Otherwise, in case, the way does not have an
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195 | * independent line style, take a line style from the multipolygon.
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196 | * If the multipolygon does not have a line style either, at least create a
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197 | * default line style from the color of the area.
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198 | *
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199 | * Now consider the case that the way is not an outer way of any multipolygon,
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200 | * but is member of a multipolygon as "inner".
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201 | * First, the style list is regenerated, considering only tags of this way.
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202 | * Then check, if the way describes something in its own right. (linear feature
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203 | * or area) If not, add a default line style from the area color of the multipolygon.
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204 | *
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205 | * @param osm OSM primitive
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206 | * @param scale scale
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207 | * @param nc navigatable component
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208 | * @return pair containing style list and range
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209 | */
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210 | private Pair<StyleElementList, Range> getImpl(OsmPrimitive osm, double scale, NavigatableComponent nc) {
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211 | if (osm instanceof Node)
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212 | return generateStyles(osm, scale, false);
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213 | else if (osm instanceof Way) {
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214 | Pair<StyleElementList, Range> p = generateStyles(osm, scale, false);
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215 |
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216 | boolean isOuterWayOfSomeMP = false;
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217 | Color wayColor = null;
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218 |
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219 | for (OsmPrimitive referrer : osm.getReferrers()) {
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220 | Relation r = (Relation) referrer;
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221 | if (!drawMultipolygon || !r.isMultipolygon() || !r.isUsable()) {
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222 | continue;
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223 | }
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224 | Multipolygon multipolygon = MultipolygonCache.getInstance().get(r);
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225 |
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226 | if (multipolygon.getOuterWays().contains(osm)) {
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227 | boolean hasIndependentLineStyle = false;
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228 | if (!isOuterWayOfSomeMP) { // do this only one time
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229 | List<StyleElement> tmp = new ArrayList<>(p.a.size());
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230 | for (StyleElement s : p.a) {
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231 | if (s instanceof AreaElement) {
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232 | wayColor = ((AreaElement) s).color;
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233 | } else {
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234 | tmp.add(s);
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235 | if (s.isProperLineStyle()) {
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236 | hasIndependentLineStyle = true;
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237 | }
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238 | }
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239 | }
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240 | p.a = new StyleElementList(tmp);
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241 | isOuterWayOfSomeMP = true;
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242 | }
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243 |
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244 | if (!hasIndependentLineStyle) {
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245 | Pair<StyleElementList, Range> mpElemStyles;
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246 | synchronized (r) {
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247 | mpElemStyles = getStyleCacheWithRange(r, scale, nc);
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248 | }
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249 | StyleElement mpLine = null;
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250 | for (StyleElement s : mpElemStyles.a) {
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251 | if (s.isProperLineStyle()) {
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252 | mpLine = s;
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253 | break;
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254 | }
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255 | }
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256 | p.b = Range.cut(p.b, mpElemStyles.b);
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257 | if (mpLine != null) {
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258 | p.a = new StyleElementList(p.a, mpLine);
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259 | break;
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260 | } else if (wayColor == null && isDefaultLines()) {
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261 | AreaElement mpArea = Utils.find(mpElemStyles.a, AreaElement.class);
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262 | if (mpArea != null) {
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263 | wayColor = mpArea.color;
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264 | }
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265 | }
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266 | }
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267 | }
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268 | }
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269 | if (isOuterWayOfSomeMP) {
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270 | if (isDefaultLines()) {
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271 | boolean hasLineStyle = false;
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272 | for (StyleElement s : p.a) {
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273 | if (s.isProperLineStyle()) {
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274 | hasLineStyle = true;
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275 | break;
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276 | }
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277 | }
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278 | if (!hasLineStyle) {
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279 | p.a = new StyleElementList(p.a, LineElement.createSimpleLineStyle(wayColor, true));
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280 | }
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281 | }
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282 | return p;
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283 | }
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284 |
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285 | if (!isDefaultLines()) return p;
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286 |
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287 | for (OsmPrimitive referrer : osm.getReferrers()) {
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288 | Relation ref = (Relation) referrer;
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289 | if (!drawMultipolygon || !ref.isMultipolygon() || !ref.isUsable()) {
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290 | continue;
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291 | }
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292 | final Multipolygon multipolygon = MultipolygonCache.getInstance().get(ref);
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293 |
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294 | if (multipolygon.getInnerWays().contains(osm)) {
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295 | p = generateStyles(osm, scale, false);
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296 | boolean hasIndependentElemStyle = false;
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297 | for (StyleElement s : p.a) {
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298 | if (s.isProperLineStyle() || s instanceof AreaElement) {
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299 | hasIndependentElemStyle = true;
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300 | break;
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301 | }
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302 | }
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303 | if (!hasIndependentElemStyle && !multipolygon.getOuterWays().isEmpty()) {
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304 | Color mpColor = null;
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305 | StyleElementList mpElemStyles;
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306 | synchronized (ref) {
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307 | mpElemStyles = get(ref, scale, nc);
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308 | }
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309 | for (StyleElement mpS : mpElemStyles) {
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310 | if (mpS instanceof AreaElement) {
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311 | mpColor = ((AreaElement) mpS).color;
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312 | break;
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313 | }
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314 | }
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315 | p.a = new StyleElementList(p.a, LineElement.createSimpleLineStyle(mpColor, true));
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316 | }
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317 | return p;
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318 | }
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319 | }
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320 | return p;
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321 | } else if (osm instanceof Relation) {
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322 | Pair<StyleElementList, Range> p = generateStyles(osm, scale, true);
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323 | if (drawMultipolygon && ((Relation) osm).isMultipolygon()
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324 | && !Utils.exists(p.a, AreaElement.class) && Main.pref.getBoolean("multipolygon.deprecated.outerstyle", false)) {
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325 | // look at outer ways to find area style
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326 | Multipolygon multipolygon = MultipolygonCache.getInstance().get((Relation) osm);
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327 | for (Way w : multipolygon.getOuterWays()) {
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328 | Pair<StyleElementList, Range> wayStyles = generateStyles(w, scale, false);
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329 | p.b = Range.cut(p.b, wayStyles.b);
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330 | StyleElement area = Utils.find(wayStyles.a, AreaElement.class);
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331 | if (area != null) {
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332 | p.a = new StyleElementList(p.a, area);
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333 | break;
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334 | }
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335 | }
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336 | }
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337 | return p;
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338 | }
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339 | return null;
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340 | }
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341 |
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342 | /**
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343 | * Create the list of styles and its valid scale range for one primitive.
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344 | *
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345 | * Loops over the list of style sources, to generate the map of properties.
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346 | * From these properties, it generates the different types of styles.
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347 | *
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348 | * @param osm the primitive to create styles for
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349 | * @param scale the scale (in meters per 100 px), must be > 0
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350 | * @param pretendWayIsClosed For styles that require the way to be closed,
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351 | * we pretend it is. This is useful for generating area styles from the (segmented)
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352 | * outer ways of a multipolygon.
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353 | * @return the generated styles and the valid range as a pair
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354 | */
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355 | public Pair<StyleElementList, Range> generateStyles(OsmPrimitive osm, double scale, boolean pretendWayIsClosed) {
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356 |
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357 | List<StyleElement> sl = new ArrayList<>();
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358 | MultiCascade mc = new MultiCascade();
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359 | Environment env = new Environment(osm, mc, null, null);
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360 |
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361 | for (StyleSource s : styleSources) {
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362 | if (s.active) {
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363 | s.apply(mc, osm, scale, pretendWayIsClosed);
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364 | }
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365 | }
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366 |
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367 | for (Entry<String, Cascade> e : mc.getLayers()) {
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368 | if ("*".equals(e.getKey())) {
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369 | continue;
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370 | }
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371 | env.layer = e.getKey();
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372 | if (osm instanceof Way) {
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373 | AreaElement areaStyle = AreaElement.create(env);
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374 | addIfNotNull(sl, areaStyle);
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375 | addIfNotNull(sl, RepeatImageElement.create(env));
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376 | addIfNotNull(sl, LineElement.createLine(env));
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377 | addIfNotNull(sl, LineElement.createLeftCasing(env));
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378 | addIfNotNull(sl, LineElement.createRightCasing(env));
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379 | addIfNotNull(sl, LineElement.createCasing(env));
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380 | addIfNotNull(sl, AreaIconElement.create(env));
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381 | addIfNotNull(sl, TextElement.create(env));
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382 | if (areaStyle != null) {
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383 | //TODO: Warn about this, or even remove it completely
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384 | addIfNotNull(sl, TextElement.createForContent(env));
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385 | }
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386 | } else if (osm instanceof Node) {
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387 | NodeElement nodeStyle = NodeElement.create(env);
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388 | if (nodeStyle != null) {
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389 | sl.add(nodeStyle);
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390 | addIfNotNull(sl, BoxTextElement.create(env, nodeStyle.getBoxProvider()));
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391 | } else {
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392 | addIfNotNull(sl, BoxTextElement.create(env, NodeElement.SIMPLE_NODE_ELEMSTYLE_BOXPROVIDER));
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393 | }
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394 | } else if (osm instanceof Relation) {
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395 | if (((Relation) osm).isMultipolygon()) {
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396 | AreaElement areaStyle = AreaElement.create(env);
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397 | addIfNotNull(sl, areaStyle);
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398 | addIfNotNull(sl, RepeatImageElement.create(env));
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399 | addIfNotNull(sl, LineElement.createLine(env));
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400 | addIfNotNull(sl, LineElement.createCasing(env));
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401 | addIfNotNull(sl, AreaIconElement.create(env));
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402 | addIfNotNull(sl, TextElement.create(env));
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403 | if (areaStyle != null) {
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404 | //TODO: Warn about this, or even remove it completely
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405 | addIfNotNull(sl, TextElement.createForContent(env));
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406 | }
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407 | } else if (osm.hasTag("type", "restriction")) {
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408 | addIfNotNull(sl, NodeElement.create(env));
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409 | }
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410 | }
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411 | }
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412 | return new Pair<>(new StyleElementList(sl), mc.range);
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413 | }
|
---|
414 |
|
---|
415 | private static <T> void addIfNotNull(List<T> list, T obj) {
|
---|
416 | if (obj != null) {
|
---|
417 | list.add(obj);
|
---|
418 | }
|
---|
419 | }
|
---|
420 |
|
---|
421 | /**
|
---|
422 | * Draw a default node symbol for nodes that have no style?
|
---|
423 | * @return {@code true} if default node symbol must be drawn
|
---|
424 | */
|
---|
425 | private boolean isDefaultNodes() {
|
---|
426 | if (defaultNodesIdx == cacheIdx)
|
---|
427 | return defaultNodes;
|
---|
428 | defaultNodes = fromCanvas("default-points", Boolean.TRUE, Boolean.class);
|
---|
429 | defaultNodesIdx = cacheIdx;
|
---|
430 | return defaultNodes;
|
---|
431 | }
|
---|
432 |
|
---|
433 | /**
|
---|
434 | * Draw a default line for ways that do not have an own line style?
|
---|
435 | * @return {@code true} if default line must be drawn
|
---|
436 | */
|
---|
437 | private boolean isDefaultLines() {
|
---|
438 | if (defaultLinesIdx == cacheIdx)
|
---|
439 | return defaultLines;
|
---|
440 | defaultLines = fromCanvas("default-lines", Boolean.TRUE, Boolean.class);
|
---|
441 | defaultLinesIdx = cacheIdx;
|
---|
442 | return defaultLines;
|
---|
443 | }
|
---|
444 |
|
---|
445 | private <T> T fromCanvas(String key, T def, Class<T> c) {
|
---|
446 | MultiCascade mc = new MultiCascade();
|
---|
447 | Relation r = new Relation();
|
---|
448 | r.put("#canvas", "query");
|
---|
449 |
|
---|
450 | for (StyleSource s : styleSources) {
|
---|
451 | if (s.active) {
|
---|
452 | s.apply(mc, r, 1, false);
|
---|
453 | }
|
---|
454 | }
|
---|
455 | return mc.getCascade("default").get(key, def, c);
|
---|
456 | }
|
---|
457 |
|
---|
458 | public boolean isDrawMultipolygon() {
|
---|
459 | return drawMultipolygon;
|
---|
460 | }
|
---|
461 |
|
---|
462 | public void setDrawMultipolygon(boolean drawMultipolygon) {
|
---|
463 | this.drawMultipolygon = drawMultipolygon;
|
---|
464 | }
|
---|
465 |
|
---|
466 | /**
|
---|
467 | * remove all style sources; only accessed from MapPaintStyles
|
---|
468 | */
|
---|
469 | void clear() {
|
---|
470 | styleSources.clear();
|
---|
471 | }
|
---|
472 |
|
---|
473 | /**
|
---|
474 | * add a style source; only accessed from MapPaintStyles
|
---|
475 | * @param style style source to add
|
---|
476 | */
|
---|
477 | void add(StyleSource style) {
|
---|
478 | styleSources.add(style);
|
---|
479 | }
|
---|
480 |
|
---|
481 | /**
|
---|
482 | * remove a style source; only accessed from MapPaintStyles
|
---|
483 | * @param style style source to remove
|
---|
484 | * @return {@code true} if this list contained the specified element
|
---|
485 | */
|
---|
486 | boolean remove(StyleSource style) {
|
---|
487 | return styleSources.remove(style);
|
---|
488 | }
|
---|
489 |
|
---|
490 | /**
|
---|
491 | * set the style sources; only accessed from MapPaintStyles
|
---|
492 | * @param sources new style sources
|
---|
493 | */
|
---|
494 | void setStyleSources(Collection<StyleSource> sources) {
|
---|
495 | styleSources.clear();
|
---|
496 | styleSources.addAll(sources);
|
---|
497 | }
|
---|
498 |
|
---|
499 | /**
|
---|
500 | * Returns the first AreaElement for a given primitive.
|
---|
501 | * @param p the OSM primitive
|
---|
502 | * @param pretendWayIsClosed For styles that require the way to be closed,
|
---|
503 | * we pretend it is. This is useful for generating area styles from the (segmented)
|
---|
504 | * outer ways of a multipolygon.
|
---|
505 | * @return first AreaElement found or {@code null}.
|
---|
506 | */
|
---|
507 | public static AreaElement getAreaElemStyle(OsmPrimitive p, boolean pretendWayIsClosed) {
|
---|
508 | MapCSSStyleSource.STYLE_SOURCE_LOCK.readLock().lock();
|
---|
509 | try {
|
---|
510 | if (MapPaintStyles.getStyles() == null)
|
---|
511 | return null;
|
---|
512 | for (StyleElement s : MapPaintStyles.getStyles().generateStyles(p, 1.0, pretendWayIsClosed).a) {
|
---|
513 | if (s instanceof AreaElement)
|
---|
514 | return (AreaElement) s;
|
---|
515 | }
|
---|
516 | return null;
|
---|
517 | } finally {
|
---|
518 | MapCSSStyleSource.STYLE_SOURCE_LOCK.readLock().unlock();
|
---|
519 | }
|
---|
520 | }
|
---|
521 |
|
---|
522 | /**
|
---|
523 | * Determines whether primitive has an AreaElement.
|
---|
524 | * @param p the OSM primitive
|
---|
525 | * @param pretendWayIsClosed For styles that require the way to be closed,
|
---|
526 | * we pretend it is. This is useful for generating area styles from the (segmented)
|
---|
527 | * outer ways of a multipolygon.
|
---|
528 | * @return {@code true} if primitive has an AreaElement
|
---|
529 | */
|
---|
530 | public static boolean hasAreaElemStyle(OsmPrimitive p, boolean pretendWayIsClosed) {
|
---|
531 | return getAreaElemStyle(p, pretendWayIsClosed) != null;
|
---|
532 | }
|
---|
533 |
|
---|
534 | /**
|
---|
535 | * Determines whether primitive has <b>only</b> an AreaElement.
|
---|
536 | * @param p the OSM primitive
|
---|
537 | * @return {@code true} if primitive has only an AreaElement
|
---|
538 | * @since 7486
|
---|
539 | */
|
---|
540 | public static boolean hasOnlyAreaOrTextStyleElements(OsmPrimitive p) {
|
---|
541 | MapCSSStyleSource.STYLE_SOURCE_LOCK.readLock().lock();
|
---|
542 | try {
|
---|
543 | if (MapPaintStyles.getStyles() == null)
|
---|
544 | return false;
|
---|
545 | StyleElementList styles = MapPaintStyles.getStyles().generateStyles(p, 1.0, false).a;
|
---|
546 | if (styles.isEmpty()) {
|
---|
547 | return false;
|
---|
548 | }
|
---|
549 | for (StyleElement s : styles) {
|
---|
550 | if (!(s instanceof AreaElement || s instanceof TextElement)) {
|
---|
551 | return false;
|
---|
552 | }
|
---|
553 | }
|
---|
554 | return true;
|
---|
555 | } finally {
|
---|
556 | MapCSSStyleSource.STYLE_SOURCE_LOCK.readLock().unlock();
|
---|
557 | }
|
---|
558 | }
|
---|
559 |
|
---|
560 | /**
|
---|
561 | * Looks up a preference value and ensures the style cache is invalidated
|
---|
562 | * as soon as this preference value is changed by the user.
|
---|
563 | *
|
---|
564 | * In addition, it adds an intermediate cache for the preference values,
|
---|
565 | * as frequent preference lookup (using <code>Main.pref.get()</code>) for
|
---|
566 | * each primitive can be slow during rendering.
|
---|
567 | *
|
---|
568 | * @param key preference key
|
---|
569 | * @param def default value
|
---|
570 | * @return the corresponding preference value
|
---|
571 | * @see org.openstreetmap.josm.data.Preferences#get(String, String)
|
---|
572 | */
|
---|
573 | public String getPreferenceCached(String key, String def) {
|
---|
574 | String res;
|
---|
575 | if (preferenceCache.containsKey(key)) {
|
---|
576 | res = preferenceCache.get(key);
|
---|
577 | } else {
|
---|
578 | res = Main.pref.get(key, null);
|
---|
579 | preferenceCache.put(key, res);
|
---|
580 | }
|
---|
581 | return res != null ? res : def;
|
---|
582 | }
|
---|
583 |
|
---|
584 | @Override
|
---|
585 | public void preferenceChanged(PreferenceChangeEvent e) {
|
---|
586 | if (preferenceCache.containsKey(e.getKey())) {
|
---|
587 | clearCached();
|
---|
588 | }
|
---|
589 | }
|
---|
590 | }
|
---|