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 | import java.util.Optional;
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13 |
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14 | import org.openstreetmap.josm.data.osm.Node;
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15 | import org.openstreetmap.josm.data.osm.OsmPrimitive;
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16 | import org.openstreetmap.josm.data.osm.Relation;
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17 | import org.openstreetmap.josm.data.osm.Way;
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18 | import org.openstreetmap.josm.data.osm.visitor.paint.PaintColors;
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19 | import org.openstreetmap.josm.data.osm.visitor.paint.relations.Multipolygon;
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20 | import org.openstreetmap.josm.data.osm.visitor.paint.relations.MultipolygonCache;
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21 | import org.openstreetmap.josm.gui.MainApplication;
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22 | import org.openstreetmap.josm.gui.NavigatableComponent;
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23 | import org.openstreetmap.josm.gui.layer.OsmDataLayer;
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24 | import org.openstreetmap.josm.gui.mappaint.DividedScale.RangeViolatedError;
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25 | import org.openstreetmap.josm.gui.mappaint.mapcss.MapCSSStyleSource;
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26 | import org.openstreetmap.josm.gui.mappaint.styleelement.AreaElement;
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27 | import org.openstreetmap.josm.gui.mappaint.styleelement.AreaIconElement;
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28 | import org.openstreetmap.josm.gui.mappaint.styleelement.BoxTextElement;
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29 | import org.openstreetmap.josm.gui.mappaint.styleelement.LineElement;
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30 | import org.openstreetmap.josm.gui.mappaint.styleelement.NodeElement;
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31 | import org.openstreetmap.josm.gui.mappaint.styleelement.RepeatImageElement;
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32 | import org.openstreetmap.josm.gui.mappaint.styleelement.StyleElement;
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33 | import org.openstreetmap.josm.gui.mappaint.styleelement.TextElement;
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34 | import org.openstreetmap.josm.gui.mappaint.styleelement.TextLabel;
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35 | import org.openstreetmap.josm.gui.util.GuiHelper;
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36 | import org.openstreetmap.josm.spi.preferences.Config;
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37 | import org.openstreetmap.josm.spi.preferences.PreferenceChangeEvent;
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38 | import org.openstreetmap.josm.spi.preferences.PreferenceChangedListener;
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39 | import org.openstreetmap.josm.tools.Pair;
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40 | import org.openstreetmap.josm.tools.Utils;
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41 |
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42 | /**
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43 | * Generates a list of {@link StyleElement}s for a primitive, to
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44 | * be drawn on the map.
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45 | * There are several steps to derive the list of elements for display:
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46 | * <ol>
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47 | * <li>{@link #generateStyles(OsmPrimitive, double, boolean)} applies the
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48 | * {@link StyleSource}s one after another to get a key-value map of MapCSS
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49 | * properties. Then a preliminary set of StyleElements is derived from the
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50 | * properties map.</li>
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51 | * <li>{@link #getImpl(OsmPrimitive, double, NavigatableComponent)} handles the
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52 | * different forms of multipolygon tagging.</li>
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53 | * <li>{@link #getStyleCacheWithRange(OsmPrimitive, double, NavigatableComponent)}
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54 | * adds a default StyleElement for primitives that would be invisible otherwise.
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55 | * (For example untagged nodes and ways.)</li>
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56 | * </ol>
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57 | * The results are cached with respect to the current scale.
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58 | *
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59 | * Use {@link #setStyleSources(Collection)} to select the StyleSources that are applied.
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60 | */
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61 | public class ElemStyles implements PreferenceChangedListener {
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62 | private final List<StyleSource> styleSources;
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63 | private boolean drawMultipolygon;
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64 |
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65 | private short cacheIdx = 1;
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66 |
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67 | private boolean defaultNodes;
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68 | private boolean defaultLines;
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69 |
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70 | private short defaultNodesIdx;
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71 | private short defaultLinesIdx;
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72 |
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73 | private final Map<String, String> preferenceCache = new HashMap<>();
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74 |
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75 | private volatile Color backgroundColorCache;
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76 |
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77 | /**
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78 | * Constructs a new {@code ElemStyles}.
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79 | */
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80 | public ElemStyles() {
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81 | styleSources = new ArrayList<>();
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82 | Config.getPref().addPreferenceChangeListener(this);
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83 | }
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84 |
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85 | /**
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86 | * Clear the style cache for all primitives of all DataSets.
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87 | */
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88 | public void clearCached() {
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89 | // run in EDT to make sure this isn't called during rendering run
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90 | GuiHelper.runInEDT(() -> {
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91 | cacheIdx++;
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92 | preferenceCache.clear();
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93 | backgroundColorCache = null;
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94 | MainApplication.getLayerManager().getLayersOfType(OsmDataLayer.class).forEach(
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95 | dl -> dl.data.clearMappaintCache());
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96 | });
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97 | }
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98 |
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99 | /**
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100 | * Returns the list of style sources.
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101 | * @return the list of style sources
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102 | */
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103 | public List<StyleSource> getStyleSources() {
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104 | return Collections.<StyleSource>unmodifiableList(styleSources);
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105 | }
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106 |
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107 | /**
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108 | * Returns the background color.
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109 | * @return the background color
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110 | */
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111 | public Color getBackgroundColor() {
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112 | if (backgroundColorCache != null)
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113 | return backgroundColorCache;
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114 | for (StyleSource s : styleSources) {
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115 | if (!s.active) {
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116 | continue;
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117 | }
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118 | Color backgroundColorOverride = s.getBackgroundColorOverride();
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119 | if (backgroundColorOverride != null) {
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120 | backgroundColorCache = backgroundColorOverride;
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121 | }
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122 | }
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123 | return Optional.ofNullable(backgroundColorCache).orElseGet(PaintColors.BACKGROUND::get);
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124 | }
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125 |
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126 | /**
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127 | * Create the list of styles for one primitive.
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128 | *
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129 | * @param osm the primitive
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130 | * @param scale the scale (in meters per 100 pixel)
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131 | * @param nc display component
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132 | * @return list of styles
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133 | */
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134 | public StyleElementList get(OsmPrimitive osm, double scale, NavigatableComponent nc) {
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135 | return getStyleCacheWithRange(osm, scale, nc).a;
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136 | }
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137 |
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138 | /**
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139 | * Create the list of styles and its valid scale range for one primitive.
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140 | *
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141 | * Automatically adds default styles in case no proper style was found.
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142 | * Uses the cache, if possible, and saves the results to the cache.
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143 | * @param osm OSM primitive
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144 | * @param scale scale
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145 | * @param nc navigatable component
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146 | * @return pair containing style list and range
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147 | */
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148 | public Pair<StyleElementList, Range> getStyleCacheWithRange(OsmPrimitive osm, double scale, NavigatableComponent nc) {
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149 | if (!osm.isCachedStyleUpToDate() || scale <= 0) {
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150 | osm.setCachedStyle(StyleCache.EMPTY_STYLECACHE);
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151 | } else {
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152 | Pair<StyleElementList, Range> lst = osm.getCachedStyle().getWithRange(scale, osm.isSelected());
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153 | if (lst.a != null)
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154 | return lst;
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155 | }
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156 | Pair<StyleElementList, Range> p = getImpl(osm, scale, nc);
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157 | if (osm instanceof Node && isDefaultNodes()) {
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158 | if (p.a.isEmpty()) {
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159 | if (TextLabel.AUTO_LABEL_COMPOSITION_STRATEGY.compose(osm) != null) {
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160 | p.a = NodeElement.DEFAULT_NODE_STYLELIST_TEXT;
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161 | } else {
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162 | p.a = NodeElement.DEFAULT_NODE_STYLELIST;
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163 | }
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164 | } else {
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165 | boolean hasNonModifier = false;
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166 | boolean hasText = false;
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167 | for (StyleElement s : p.a) {
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168 | if (s instanceof BoxTextElement) {
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169 | hasText = true;
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170 | } else {
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171 | if (!s.isModifier) {
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172 | hasNonModifier = true;
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173 | }
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174 | }
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175 | }
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176 | if (!hasNonModifier) {
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177 | p.a = new StyleElementList(p.a, NodeElement.SIMPLE_NODE_ELEMSTYLE);
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178 | if (!hasText && TextLabel.AUTO_LABEL_COMPOSITION_STRATEGY.compose(osm) != null) {
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179 | p.a = new StyleElementList(p.a, BoxTextElement.SIMPLE_NODE_TEXT_ELEMSTYLE);
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180 | }
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181 | }
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182 | }
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183 | } else if (osm instanceof Way && isDefaultLines()) {
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184 | boolean hasProperLineStyle = false;
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185 | for (StyleElement s : p.a) {
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186 | if (s.isProperLineStyle()) {
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187 | hasProperLineStyle = true;
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188 | break;
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189 | }
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190 | }
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191 | if (!hasProperLineStyle) {
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192 | AreaElement area = Utils.find(p.a, AreaElement.class);
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193 | LineElement line = area == null ? LineElement.UNTAGGED_WAY : LineElement.createSimpleLineStyle(area.color, true);
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194 | p.a = new StyleElementList(p.a, line);
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195 | }
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196 | }
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197 | StyleCache style = osm.getCachedStyle() != null ? osm.getCachedStyle() : StyleCache.EMPTY_STYLECACHE;
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198 | try {
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199 | osm.setCachedStyle(style.put(p.a, p.b, osm.isSelected()));
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200 | } catch (RangeViolatedError e) {
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201 | throw new AssertionError("Range violated: " + e.getMessage()
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202 | + " (object: " + osm.getPrimitiveId() + ", current style: "+osm.getCachedStyle()
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203 | + ", scale: " + scale + ", new stylelist: " + p.a + ", new range: " + p.b + ')', e);
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204 | }
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205 | osm.declareCachedStyleUpToDate();
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206 | return p;
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207 | }
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208 |
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209 | /**
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210 | * Create the list of styles and its valid scale range for one primitive.
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211 | *
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212 | * This method does multipolygon handling.
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213 | *
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214 | * If the primitive is a way, look for multipolygon parents. In case it
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215 | * is indeed member of some multipolygon as role "outer", all area styles
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216 | * are removed. (They apply to the multipolygon area.)
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217 | * Outer ways can have their own independent line styles, e.g. a road as
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218 | * boundary of a forest. Otherwise, in case, the way does not have an
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219 | * independent line style, take a line style from the multipolygon.
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220 | * If the multipolygon does not have a line style either, at least create a
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221 | * default line style from the color of the area.
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222 | *
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223 | * Now consider the case that the way is not an outer way of any multipolygon,
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224 | * but is member of a multipolygon as "inner".
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225 | * First, the style list is regenerated, considering only tags of this way.
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226 | * Then check, if the way describes something in its own right. (linear feature
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227 | * or area) If not, add a default line style from the area color of the multipolygon.
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228 | *
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229 | * @param osm OSM primitive
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230 | * @param scale scale
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231 | * @param nc navigatable component
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232 | * @return pair containing style list and range
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233 | */
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234 | private Pair<StyleElementList, Range> getImpl(OsmPrimitive osm, double scale, NavigatableComponent nc) {
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235 | if (osm instanceof Node)
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236 | return generateStyles(osm, scale, false);
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237 | else if (osm instanceof Way) {
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238 | Pair<StyleElementList, Range> p = generateStyles(osm, scale, false);
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239 |
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240 | boolean isOuterWayOfSomeMP = false;
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241 | Color wayColor = null;
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242 |
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243 | // FIXME: Maybe in the future outer way styles apply to outers ignoring the multipolygon?
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244 | for (OsmPrimitive referrer : osm.getReferrers()) {
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245 | Relation r = (Relation) referrer;
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246 | if (!drawMultipolygon || !r.isMultipolygon() || !r.isUsable()) {
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247 | continue;
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248 | }
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249 | Multipolygon multipolygon = MultipolygonCache.getInstance().get(r);
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250 |
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251 | if (multipolygon.getOuterWays().contains(osm)) {
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252 | boolean hasIndependentLineStyle = false;
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253 | if (!isOuterWayOfSomeMP) { // do this only one time
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254 | List<StyleElement> tmp = new ArrayList<>(p.a.size());
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255 | for (StyleElement s : p.a) {
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256 | if (s instanceof AreaElement) {
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257 | wayColor = ((AreaElement) s).color;
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258 | } else {
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259 | tmp.add(s);
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260 | if (s.isProperLineStyle()) {
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261 | hasIndependentLineStyle = true;
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262 | }
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263 | }
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264 | }
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265 | p.a = new StyleElementList(tmp);
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266 | isOuterWayOfSomeMP = true;
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267 | }
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268 |
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269 | if (!hasIndependentLineStyle) {
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270 | Pair<StyleElementList, Range> mpElemStyles;
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271 | synchronized (r) {
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272 | mpElemStyles = getStyleCacheWithRange(r, scale, nc);
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273 | }
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274 | StyleElement mpLine = null;
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275 | for (StyleElement s : mpElemStyles.a) {
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276 | if (s.isProperLineStyle()) {
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277 | mpLine = s;
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278 | break;
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279 | }
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280 | }
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281 | p.b = Range.cut(p.b, mpElemStyles.b);
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282 | if (mpLine != null) {
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283 | p.a = new StyleElementList(p.a, mpLine);
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284 | break;
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285 | } else if (wayColor == null && isDefaultLines()) {
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286 | AreaElement mpArea = Utils.find(mpElemStyles.a, AreaElement.class);
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287 | if (mpArea != null) {
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288 | wayColor = mpArea.color;
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289 | }
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290 | }
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291 | }
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292 | }
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293 | }
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294 | if (isOuterWayOfSomeMP) {
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295 | if (isDefaultLines()) {
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296 | boolean hasLineStyle = false;
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297 | for (StyleElement s : p.a) {
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298 | if (s.isProperLineStyle()) {
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299 | hasLineStyle = true;
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300 | break;
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301 | }
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302 | }
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303 | if (!hasLineStyle) {
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304 | p.a = new StyleElementList(p.a, LineElement.createSimpleLineStyle(wayColor, true));
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305 | }
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306 | }
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307 | return p;
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308 | }
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309 |
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310 | if (!isDefaultLines()) return p;
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311 |
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312 | for (OsmPrimitive referrer : osm.getReferrers()) {
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313 | Relation ref = (Relation) referrer;
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314 | if (!drawMultipolygon || !ref.isMultipolygon() || !ref.isUsable()) {
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315 | continue;
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316 | }
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317 | final Multipolygon multipolygon = MultipolygonCache.getInstance().get(ref);
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318 |
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319 | if (multipolygon.getInnerWays().contains(osm)) {
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320 | p = generateStyles(osm, scale, false);
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321 | boolean hasIndependentElemStyle = false;
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322 | for (StyleElement s : p.a) {
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323 | if (s.isProperLineStyle() || s instanceof AreaElement) {
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324 | hasIndependentElemStyle = true;
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325 | break;
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326 | }
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327 | }
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328 | if (!hasIndependentElemStyle && !multipolygon.getOuterWays().isEmpty()) {
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329 | Color mpColor = null;
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330 | StyleElementList mpElemStyles;
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331 | synchronized (ref) {
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332 | mpElemStyles = get(ref, scale, nc);
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333 | }
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334 | for (StyleElement mpS : mpElemStyles) {
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335 | if (mpS instanceof AreaElement) {
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336 | mpColor = ((AreaElement) mpS).color;
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337 | break;
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338 | }
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339 | }
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340 | p.a = new StyleElementList(p.a, LineElement.createSimpleLineStyle(mpColor, true));
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341 | }
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342 | return p;
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343 | }
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344 | }
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345 | return p;
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346 | } else if (osm instanceof Relation) {
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347 | return generateStyles(osm, scale, true);
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348 | }
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349 | return null;
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350 | }
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351 |
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352 | /**
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353 | * Create the list of styles and its valid scale range for one primitive.
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354 | *
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355 | * Loops over the list of style sources, to generate the map of properties.
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356 | * From these properties, it generates the different types of styles.
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357 | *
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358 | * @param osm the primitive to create styles for
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359 | * @param scale the scale (in meters per 100 px), must be > 0
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360 | * @param pretendWayIsClosed For styles that require the way to be closed,
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361 | * we pretend it is. This is useful for generating area styles from the (segmented)
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362 | * outer ways of a multipolygon.
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363 | * @return the generated styles and the valid range as a pair
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364 | */
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365 | public Pair<StyleElementList, Range> generateStyles(OsmPrimitive osm, double scale, boolean pretendWayIsClosed) {
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366 |
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367 | List<StyleElement> sl = new ArrayList<>();
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368 | MultiCascade mc = new MultiCascade();
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369 | Environment env = new Environment(osm, mc, null, null);
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370 |
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371 | for (StyleSource s : styleSources) {
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372 | if (s.active) {
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373 | s.apply(mc, osm, scale, pretendWayIsClosed);
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374 | }
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375 | }
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376 |
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377 | for (Entry<String, Cascade> e : mc.getLayers()) {
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378 | if ("*".equals(e.getKey())) {
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379 | continue;
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380 | }
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381 | env.layer = e.getKey();
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382 | if (osm instanceof Way) {
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383 | AreaElement areaStyle = AreaElement.create(env);
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384 | addIfNotNull(sl, areaStyle);
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385 | addIfNotNull(sl, RepeatImageElement.create(env));
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386 | addIfNotNull(sl, LineElement.createLine(env));
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387 | addIfNotNull(sl, LineElement.createLeftCasing(env));
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388 | addIfNotNull(sl, LineElement.createRightCasing(env));
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389 | addIfNotNull(sl, LineElement.createCasing(env));
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390 | addIfNotNull(sl, AreaIconElement.create(env));
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391 | addIfNotNull(sl, TextElement.create(env));
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392 | if (areaStyle != null) {
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393 | //TODO: Warn about this, or even remove it completely
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394 | addIfNotNull(sl, TextElement.createForContent(env));
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395 | }
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396 | } else if (osm instanceof Node) {
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397 | NodeElement nodeStyle = NodeElement.create(env);
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398 | if (nodeStyle != null) {
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399 | sl.add(nodeStyle);
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400 | addIfNotNull(sl, BoxTextElement.create(env, nodeStyle.getBoxProvider()));
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401 | } else {
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402 | addIfNotNull(sl, BoxTextElement.create(env, NodeElement.SIMPLE_NODE_ELEMSTYLE_BOXPROVIDER));
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403 | }
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404 | } else if (osm instanceof Relation) {
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405 | if (((Relation) osm).isMultipolygon()) {
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406 | AreaElement areaStyle = AreaElement.create(env);
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407 | addIfNotNull(sl, areaStyle);
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408 | addIfNotNull(sl, RepeatImageElement.create(env));
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409 | addIfNotNull(sl, LineElement.createLine(env));
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410 | addIfNotNull(sl, LineElement.createCasing(env));
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411 | addIfNotNull(sl, AreaIconElement.create(env));
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412 | addIfNotNull(sl, TextElement.create(env));
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413 | if (areaStyle != null) {
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414 | //TODO: Warn about this, or even remove it completely
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415 | addIfNotNull(sl, TextElement.createForContent(env));
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416 | }
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417 | } else if (osm.hasTag("type", "restriction")) {
|
---|
418 | addIfNotNull(sl, NodeElement.create(env));
|
---|
419 | }
|
---|
420 | }
|
---|
421 | }
|
---|
422 | return new Pair<>(new StyleElementList(sl), mc.range);
|
---|
423 | }
|
---|
424 |
|
---|
425 | private static <T> void addIfNotNull(List<T> list, T obj) {
|
---|
426 | if (obj != null) {
|
---|
427 | list.add(obj);
|
---|
428 | }
|
---|
429 | }
|
---|
430 |
|
---|
431 | /**
|
---|
432 | * Draw a default node symbol for nodes that have no style?
|
---|
433 | * @return {@code true} if default node symbol must be drawn
|
---|
434 | */
|
---|
435 | private boolean isDefaultNodes() {
|
---|
436 | if (defaultNodesIdx == cacheIdx)
|
---|
437 | return defaultNodes;
|
---|
438 | defaultNodes = fromCanvas("default-points", Boolean.TRUE, Boolean.class);
|
---|
439 | defaultNodesIdx = cacheIdx;
|
---|
440 | return defaultNodes;
|
---|
441 | }
|
---|
442 |
|
---|
443 | /**
|
---|
444 | * Draw a default line for ways that do not have an own line style?
|
---|
445 | * @return {@code true} if default line must be drawn
|
---|
446 | */
|
---|
447 | private boolean isDefaultLines() {
|
---|
448 | if (defaultLinesIdx == cacheIdx)
|
---|
449 | return defaultLines;
|
---|
450 | defaultLines = fromCanvas("default-lines", Boolean.TRUE, Boolean.class);
|
---|
451 | defaultLinesIdx = cacheIdx;
|
---|
452 | return defaultLines;
|
---|
453 | }
|
---|
454 |
|
---|
455 | private <T> T fromCanvas(String key, T def, Class<T> c) {
|
---|
456 | MultiCascade mc = new MultiCascade();
|
---|
457 | Relation r = new Relation();
|
---|
458 | r.put("#canvas", "query");
|
---|
459 |
|
---|
460 | for (StyleSource s : styleSources) {
|
---|
461 | if (s.active) {
|
---|
462 | s.apply(mc, r, 1, false);
|
---|
463 | }
|
---|
464 | }
|
---|
465 | return mc.getCascade("default").get(key, def, c);
|
---|
466 | }
|
---|
467 |
|
---|
468 | /**
|
---|
469 | * Determines whether multipolygons must be drawn.
|
---|
470 | * @return whether multipolygons must be drawn.
|
---|
471 | */
|
---|
472 | public boolean isDrawMultipolygon() {
|
---|
473 | return drawMultipolygon;
|
---|
474 | }
|
---|
475 |
|
---|
476 | /**
|
---|
477 | * Sets whether multipolygons must be drawn.
|
---|
478 | * @param drawMultipolygon whether multipolygons must be drawn
|
---|
479 | */
|
---|
480 | public void setDrawMultipolygon(boolean drawMultipolygon) {
|
---|
481 | this.drawMultipolygon = drawMultipolygon;
|
---|
482 | }
|
---|
483 |
|
---|
484 | /**
|
---|
485 | * remove all style sources; only accessed from MapPaintStyles
|
---|
486 | */
|
---|
487 | void clear() {
|
---|
488 | styleSources.clear();
|
---|
489 | }
|
---|
490 |
|
---|
491 | /**
|
---|
492 | * add a style source; only accessed from MapPaintStyles
|
---|
493 | * @param style style source to add
|
---|
494 | */
|
---|
495 | void add(StyleSource style) {
|
---|
496 | styleSources.add(style);
|
---|
497 | }
|
---|
498 |
|
---|
499 | /**
|
---|
500 | * remove a style source; only accessed from MapPaintStyles
|
---|
501 | * @param style style source to remove
|
---|
502 | * @return {@code true} if this list contained the specified element
|
---|
503 | */
|
---|
504 | boolean remove(StyleSource style) {
|
---|
505 | return styleSources.remove(style);
|
---|
506 | }
|
---|
507 |
|
---|
508 | /**
|
---|
509 | * set the style sources; only accessed from MapPaintStyles
|
---|
510 | * @param sources new style sources
|
---|
511 | */
|
---|
512 | void setStyleSources(Collection<StyleSource> sources) {
|
---|
513 | styleSources.clear();
|
---|
514 | styleSources.addAll(sources);
|
---|
515 | }
|
---|
516 |
|
---|
517 | /**
|
---|
518 | * Returns the first AreaElement for a given primitive.
|
---|
519 | * @param p the OSM primitive
|
---|
520 | * @param pretendWayIsClosed For styles that require the way to be closed,
|
---|
521 | * we pretend it is. This is useful for generating area styles from the (segmented)
|
---|
522 | * outer ways of a multipolygon.
|
---|
523 | * @return first AreaElement found or {@code null}.
|
---|
524 | */
|
---|
525 | public static AreaElement getAreaElemStyle(OsmPrimitive p, boolean pretendWayIsClosed) {
|
---|
526 | MapCSSStyleSource.STYLE_SOURCE_LOCK.readLock().lock();
|
---|
527 | try {
|
---|
528 | if (MapPaintStyles.getStyles() == null)
|
---|
529 | return null;
|
---|
530 | for (StyleElement s : MapPaintStyles.getStyles().generateStyles(p, 1.0, pretendWayIsClosed).a) {
|
---|
531 | if (s instanceof AreaElement)
|
---|
532 | return (AreaElement) s;
|
---|
533 | }
|
---|
534 | return null;
|
---|
535 | } finally {
|
---|
536 | MapCSSStyleSource.STYLE_SOURCE_LOCK.readLock().unlock();
|
---|
537 | }
|
---|
538 | }
|
---|
539 |
|
---|
540 | /**
|
---|
541 | * Determines whether primitive has an AreaElement.
|
---|
542 | * @param p the OSM primitive
|
---|
543 | * @param pretendWayIsClosed For styles that require the way to be closed,
|
---|
544 | * we pretend it is. This is useful for generating area styles from the (segmented)
|
---|
545 | * outer ways of a multipolygon.
|
---|
546 | * @return {@code true} if primitive has an AreaElement
|
---|
547 | */
|
---|
548 | public static boolean hasAreaElemStyle(OsmPrimitive p, boolean pretendWayIsClosed) {
|
---|
549 | return getAreaElemStyle(p, pretendWayIsClosed) != null;
|
---|
550 | }
|
---|
551 |
|
---|
552 | /**
|
---|
553 | * Determines whether primitive has area-type {@link StyleElement}s, but
|
---|
554 | * no line-type StyleElements.
|
---|
555 | *
|
---|
556 | * {@link TextElement} is ignored, as it can be both line and area-type.
|
---|
557 | * @param p the OSM primitive
|
---|
558 | * @return {@code true} if primitive has area elements, but no line elements
|
---|
559 | * @since 12700
|
---|
560 | */
|
---|
561 | public static boolean hasOnlyAreaElements(OsmPrimitive p) {
|
---|
562 | MapCSSStyleSource.STYLE_SOURCE_LOCK.readLock().lock();
|
---|
563 | try {
|
---|
564 | if (MapPaintStyles.getStyles() == null)
|
---|
565 | return false;
|
---|
566 | StyleElementList styles = MapPaintStyles.getStyles().generateStyles(p, 1.0, false).a;
|
---|
567 | boolean hasAreaElement = false;
|
---|
568 | for (StyleElement s : styles) {
|
---|
569 | if (s instanceof TextElement) {
|
---|
570 | continue;
|
---|
571 | }
|
---|
572 | if (s instanceof AreaElement) {
|
---|
573 | hasAreaElement = true;
|
---|
574 | } else {
|
---|
575 | return false;
|
---|
576 | }
|
---|
577 | }
|
---|
578 | return hasAreaElement;
|
---|
579 | } finally {
|
---|
580 | MapCSSStyleSource.STYLE_SOURCE_LOCK.readLock().unlock();
|
---|
581 | }
|
---|
582 | }
|
---|
583 |
|
---|
584 | /**
|
---|
585 | * Looks up a preference value and ensures the style cache is invalidated
|
---|
586 | * as soon as this preference value is changed by the user.
|
---|
587 | *
|
---|
588 | * In addition, it adds an intermediate cache for the preference values,
|
---|
589 | * as frequent preference lookup (using <code>Config.getPref().get()</code>) for
|
---|
590 | * each primitive can be slow during rendering.
|
---|
591 | *
|
---|
592 | * @param key preference key
|
---|
593 | * @param def default value
|
---|
594 | * @return the corresponding preference value
|
---|
595 | * @see org.openstreetmap.josm.data.Preferences#get(String, String)
|
---|
596 | */
|
---|
597 | public String getPreferenceCached(String key, String def) {
|
---|
598 | String res;
|
---|
599 | if (preferenceCache.containsKey(key)) {
|
---|
600 | res = preferenceCache.get(key);
|
---|
601 | } else {
|
---|
602 | res = Config.getPref().get(key, null);
|
---|
603 | preferenceCache.put(key, res);
|
---|
604 | }
|
---|
605 | return res != null ? res : def;
|
---|
606 | }
|
---|
607 |
|
---|
608 | @Override
|
---|
609 | public void preferenceChanged(PreferenceChangeEvent e) {
|
---|
610 | if (preferenceCache.containsKey(e.getKey())) {
|
---|
611 | clearCached();
|
---|
612 | }
|
---|
613 | }
|
---|
614 | }
|
---|