1 | // License: GPL. For details, see LICENSE file.
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2 | package org.openstreetmap.josm.gui.mappaint.mapcss;
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3 |
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4 | import java.util.Collection;
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5 | import java.util.Collections;
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6 | import java.util.List;
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7 | import java.util.NoSuchElementException;
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8 | import java.util.regex.PatternSyntaxException;
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9 |
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10 | import org.openstreetmap.josm.Main;
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11 | import org.openstreetmap.josm.data.osm.Node;
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12 | import org.openstreetmap.josm.data.osm.OsmPrimitive;
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13 | import org.openstreetmap.josm.data.osm.OsmPrimitiveType;
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14 | import org.openstreetmap.josm.data.osm.Relation;
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15 | import org.openstreetmap.josm.data.osm.RelationMember;
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16 | import org.openstreetmap.josm.data.osm.Way;
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17 | import org.openstreetmap.josm.data.osm.visitor.AbstractVisitor;
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18 | import org.openstreetmap.josm.gui.mappaint.Environment;
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19 | import org.openstreetmap.josm.gui.mappaint.Range;
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20 | import org.openstreetmap.josm.tools.CheckParameterUtil;
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21 | import org.openstreetmap.josm.tools.Geometry;
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22 | import org.openstreetmap.josm.tools.Pair;
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23 | import org.openstreetmap.josm.tools.Predicates;
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24 | import org.openstreetmap.josm.tools.Utils;
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25 |
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26 | /**
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27 | * MapCSS selector.
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28 | *
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29 | * A rule has two parts, a selector and a declaration block
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30 | * e.g.
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31 | * <pre>
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32 | * way[highway=residential]
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33 | * { width: 10; color: blue; }
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34 | * </pre>
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35 | *
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36 | * The selector decides, if the declaration block gets applied or not.
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37 | *
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38 | * All implementing classes of Selector are immutable.
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39 | */
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40 | public interface Selector {
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41 |
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42 | /**
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43 | * Apply the selector to the primitive and check if it matches.
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44 | *
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45 | * @param env the Environment. env.mc and env.layer are read-only when matching a selector.
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46 | * env.source is not needed. This method will set the matchingReferrers field of env as
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47 | * a side effect! Make sure to clear it before invoking this method.
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48 | * @return true, if the selector applies
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49 | */
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50 | boolean matches(Environment env);
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51 |
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52 | String getSubpart();
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53 |
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54 | Range getRange();
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55 |
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56 | /**
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57 | * Create an "optimized" copy of this selector that omits the base check.
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58 | *
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59 | * For the style source, the list of rules is preprocessed, such that
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60 | * there is a separate list of rules for nodes, ways, ...
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61 | *
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62 | * This means that the base check does not have to be performed
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63 | * for each rule, but only once for each primitive.
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64 | *
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65 | * @return a selector that is identical to this object, except the base of the
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66 | * "rightmost" selector is not checked
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67 | */
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68 | Selector optimizedBaseCheck();
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69 |
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70 | public static enum ChildOrParentSelectorType {
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71 | CHILD, PARENT, ELEMENT_OF, CROSSING, SIBLING
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72 | }
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73 |
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74 | /**
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75 | * <p>Represents a child selector or a parent selector.</p>
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76 | *
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77 | * <p>In addition to the standard CSS notation for child selectors, JOSM also supports
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78 | * an "inverse" notation:</p>
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79 | * <pre>
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80 | * selector_a > selector_b { ... } // the standard notation (child selector)
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81 | * relation[type=route] > way { ... } // example (all ways of a route)
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82 | *
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83 | * selector_a < selector_b { ... } // the inverse notation (parent selector)
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84 | * node[traffic_calming] < way { ... } // example (way that has a traffic calming node)
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85 | * </pre>
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86 | *
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87 | */
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88 | public static class ChildOrParentSelector implements Selector {
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89 | public final Selector left;
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90 | public final LinkSelector link;
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91 | public final Selector right;
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92 | public final ChildOrParentSelectorType type;
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93 |
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94 | /**
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95 | *
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96 | * @param a the first selector
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97 | * @param b the second selector
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98 | * @param type the selector type
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99 | */
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100 | public ChildOrParentSelector(Selector a, LinkSelector link, Selector b, ChildOrParentSelectorType type) {
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101 | CheckParameterUtil.ensureParameterNotNull(a, "a");
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102 | CheckParameterUtil.ensureParameterNotNull(b, "b");
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103 | CheckParameterUtil.ensureParameterNotNull(link, "link");
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104 | CheckParameterUtil.ensureParameterNotNull(type, "type");
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105 | this.left = a;
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106 | this.link = link;
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107 | this.right = b;
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108 | this.type = type;
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109 | }
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110 |
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111 | /**
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112 | * <p>Finds the first referrer matching {@link #left}</p>
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113 | *
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114 | * <p>The visitor works on an environment and it saves the matching
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115 | * referrer in {@code e.parent} and its relative position in the
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116 | * list referrers "child list" in {@code e.index}.</p>
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117 | *
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118 | * <p>If after execution {@code e.parent} is null, no matching
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119 | * referrer was found.</p>
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120 | *
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121 | */
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122 | private class MatchingReferrerFinder extends AbstractVisitor{
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123 | private Environment e;
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124 |
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125 | /**
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126 | * Constructor
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127 | * @param e the environment against which we match
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128 | */
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129 | public MatchingReferrerFinder(Environment e){
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130 | this.e = e;
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131 | }
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132 |
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133 | @Override
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134 | public void visit(Node n) {
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135 | // node should never be a referrer
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136 | throw new AssertionError();
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137 | }
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138 |
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139 | @Override
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140 | public void visit(Way w) {
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141 | /*
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142 | * If e.parent is already set to the first matching referrer. We skip any following
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143 | * referrer injected into the visitor.
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144 | */
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145 | if (e.parent != null) return;
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146 |
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147 | if (!left.matches(e.withPrimitive(w)))
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148 | return;
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149 | for (int i=0; i<w.getNodesCount(); i++) {
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150 | Node n = w.getNode(i);
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151 | if (n.equals(e.osm)) {
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152 | if (link.matches(e.withParentAndIndexAndLinkContext(w, i))) {
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153 | e.parent = w;
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154 | e.index = i;
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155 | return;
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156 | }
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157 | }
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158 | }
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159 | }
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160 |
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161 | @Override
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162 | public void visit(Relation r) {
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163 | /*
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164 | * If e.parent is already set to the first matching referrer. We skip any following
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165 | * referrer injected into the visitor.
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166 | */
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167 | if (e.parent != null) return;
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168 |
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169 | if (!left.matches(e.withPrimitive(r)))
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170 | return;
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171 | for (int i=0; i < r.getMembersCount(); i++) {
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172 | RelationMember m = r.getMember(i);
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173 | if (m.getMember().equals(e.osm)) {
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174 | if (link.matches(e.withParentAndIndexAndLinkContext(r, i))) {
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175 | e.parent = r;
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176 | e.index = i;
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177 | return;
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178 | }
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179 | }
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180 | }
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181 | }
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182 | }
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183 |
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184 | private abstract class AbstractFinder extends AbstractVisitor {
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185 | protected final Environment e;
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186 |
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187 | protected AbstractFinder(Environment e) {
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188 | this.e = e;
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189 | }
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190 |
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191 | @Override
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192 | public void visit(Node n) {
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193 | }
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194 |
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195 | @Override
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196 | public void visit(Way w) {
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197 | }
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198 |
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199 | @Override
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200 | public void visit(Relation r) {
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201 | }
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202 |
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203 | public void visit(Collection<? extends OsmPrimitive> primitives) {
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204 | for (OsmPrimitive p : primitives) {
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205 | if (e.child != null) {
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206 | // abort if first match has been found
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207 | break;
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208 | } else if (isPrimitiveUsable(p)) {
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209 | p.accept(this);
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210 | }
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211 | }
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212 | }
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213 |
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214 | public boolean isPrimitiveUsable(OsmPrimitive p) {
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215 | return !e.osm.equals(p) && p.isUsable();
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216 | }
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217 | }
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218 |
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219 | private final class CrossingFinder extends AbstractFinder {
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220 | private CrossingFinder(Environment e) {
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221 | super(e);
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222 | CheckParameterUtil.ensureThat(e.osm instanceof Way, "Only ways are supported");
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223 | }
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224 |
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225 | @Override
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226 | public void visit(Way w) {
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227 | if (e.child == null && left.matches(new Environment().withPrimitive(w))) {
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228 | if (e.osm instanceof Way && Geometry.PolygonIntersection.CROSSING.equals(Geometry.polygonIntersection(w.getNodes(), ((Way) e.osm).getNodes()))) {
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229 | e.child = w;
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230 | }
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231 | }
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232 | }
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233 | }
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234 |
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235 | private class ContainsFinder extends AbstractFinder {
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236 | private ContainsFinder(Environment e) {
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237 | super(e);
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238 | CheckParameterUtil.ensureThat(!(e.osm instanceof Node), "Nodes not supported");
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239 | }
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240 |
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241 | @Override
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242 | public void visit(Node n) {
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243 | if (e.child == null && left.matches(new Environment().withPrimitive(n))) {
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244 | if (e.osm instanceof Way && Geometry.nodeInsidePolygon(n, ((Way) e.osm).getNodes())
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245 | || e.osm instanceof Relation && ((Relation) e.osm).isMultipolygon() && Geometry.isNodeInsideMultiPolygon(n, (Relation) e.osm, null)) {
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246 | e.child = n;
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247 | }
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248 | }
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249 | }
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250 |
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251 | @Override
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252 | public void visit(Way w) {
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253 | if (e.child == null && left.matches(new Environment().withPrimitive(w))) {
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254 | if (e.osm instanceof Way && Geometry.PolygonIntersection.FIRST_INSIDE_SECOND.equals(Geometry.polygonIntersection(w.getNodes(), ((Way) e.osm).getNodes()))
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255 | || e.osm instanceof Relation && ((Relation) e.osm).isMultipolygon() && Geometry.isPolygonInsideMultiPolygon(w.getNodes(), (Relation) e.osm, null)) {
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256 | e.child = w;
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257 | }
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258 | }
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259 | }
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260 | }
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261 |
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262 | @Override
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263 | public boolean matches(Environment e) {
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264 |
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265 | if (!right.matches(e))
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266 | return false;
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267 |
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268 | if (ChildOrParentSelectorType.ELEMENT_OF.equals(type)) {
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269 |
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270 | if (e.osm instanceof Node || e.osm.getDataSet() == null) {
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271 | // nodes cannot contain elements
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272 | return false;
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273 | }
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274 |
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275 | ContainsFinder containsFinder;
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276 | try {
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277 | // if right selector also matches relations and if matched primitive is a way which is part of a multipolygon,
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278 | // use the multipolygon for further analysis
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279 | if (!(e.osm instanceof Way)
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280 | || (right instanceof OptimizedGeneralSelector
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281 | && !((OptimizedGeneralSelector) right).matchesBase(OsmPrimitiveType.RELATION))) {
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282 | throw new NoSuchElementException();
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283 | }
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284 | final Collection<Relation> multipolygons = Utils.filteredCollection(Utils.filter(
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285 | e.osm.getReferrers(), Predicates.hasTag("type", "multipolygon")), Relation.class);
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286 | final Relation multipolygon = multipolygons.iterator().next();
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287 | if (multipolygon == null) throw new NoSuchElementException();
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288 | containsFinder = new ContainsFinder(new Environment().withPrimitive(multipolygon)) {
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289 | @Override
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290 | public boolean isPrimitiveUsable(OsmPrimitive p) {
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291 | return super.isPrimitiveUsable(p) && !multipolygon.getMemberPrimitives().contains(p);
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292 | }
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293 | };
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294 | } catch (NoSuchElementException ignore) {
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295 | containsFinder = new ContainsFinder(e);
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296 | }
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297 | e.parent = e.osm;
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298 |
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299 | if (left instanceof OptimizedGeneralSelector) {
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300 | if (((OptimizedGeneralSelector) left).matchesBase(OsmPrimitiveType.NODE)) {
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301 | containsFinder.visit(e.osm.getDataSet().searchNodes(e.osm.getBBox()));
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302 | }
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303 | if (((OptimizedGeneralSelector) left).matchesBase(OsmPrimitiveType.WAY)) {
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304 | containsFinder.visit(e.osm.getDataSet().searchWays(e.osm.getBBox()));
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305 | }
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306 | } else {
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307 | // use slow test
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308 | containsFinder.visit(e.osm.getDataSet().allPrimitives());
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309 | }
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310 |
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311 | return e.child != null;
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312 |
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313 | } else if (ChildOrParentSelectorType.CROSSING.equals(type) && e.osm instanceof Way) {
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314 | e.parent = e.osm;
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315 | final CrossingFinder crossingFinder = new CrossingFinder(e);
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316 | if (right instanceof OptimizedGeneralSelector
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317 | && ((OptimizedGeneralSelector) right).matchesBase(OsmPrimitiveType.WAY)) {
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318 | crossingFinder.visit(e.osm.getDataSet().searchWays(e.osm.getBBox()));
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319 | }
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320 | return e.child != null;
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321 | } else if (ChildOrParentSelectorType.SIBLING.equals(type)) {
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322 | if (e.osm instanceof Node) {
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323 | for (Way w : Utils.filteredCollection(e.osm.getReferrers(true), Way.class)) {
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324 | final int i = w.getNodes().indexOf(e.osm);
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325 | if (i - 1 >= 0) {
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326 | final Node n = w.getNode(i - 1);
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327 | final Environment e2 = e.withPrimitive(n).withParent(w).withChild(e.osm);
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328 | if (left.matches(e2) && link.matches(e2.withLinkContext())) {
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329 | e.child = n;
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330 | e.index = i;
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331 | e.parent = w;
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332 | return true;
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333 | }
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334 | }
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335 | }
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336 | }
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337 | } else if (ChildOrParentSelectorType.CHILD.equals(type)) {
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338 | MatchingReferrerFinder collector = new MatchingReferrerFinder(e);
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339 | e.osm.visitReferrers(collector);
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340 | if (e.parent != null)
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341 | return true;
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342 | } else if (ChildOrParentSelectorType.PARENT.equals(type)) {
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343 | if (e.osm instanceof Way) {
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344 | List<Node> wayNodes = ((Way) e.osm).getNodes();
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345 | for (int i=0; i<wayNodes.size(); i++) {
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346 | Node n = wayNodes.get(i);
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347 | if (left.matches(e.withPrimitive(n))) {
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348 | if (link.matches(e.withChildAndIndexAndLinkContext(n, i))) {
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349 | e.child = n;
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350 | e.index = i;
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351 | return true;
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352 | }
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353 | }
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354 | }
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355 | }
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356 | else if (e.osm instanceof Relation) {
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357 | List<RelationMember> members = ((Relation) e.osm).getMembers();
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358 | for (int i=0; i<members.size(); i++) {
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359 | OsmPrimitive member = members.get(i).getMember();
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360 | if (left.matches(e.withPrimitive(member))) {
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361 | if (link.matches(e.withChildAndIndexAndLinkContext(member, i))) {
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362 | e.child = member;
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363 | e.index = i;
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364 | return true;
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365 | }
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366 | }
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367 | }
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368 | }
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369 | }
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370 | return false;
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371 | }
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372 |
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373 | @Override
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374 | public String getSubpart() {
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375 | return right.getSubpart();
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376 | }
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377 |
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378 | @Override
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379 | public Range getRange() {
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380 | return right.getRange();
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381 | }
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382 |
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383 | @Override
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384 | public Selector optimizedBaseCheck() {
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385 | return new ChildOrParentSelector(left, link, right.optimizedBaseCheck(), type);
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386 | }
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387 |
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388 | @Override
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389 | public String toString() {
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390 | return left + " " + (ChildOrParentSelectorType.PARENT.equals(type) ? "<" : ">") + link + " " + right;
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391 | }
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392 | }
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393 |
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394 | /**
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395 | * Super class of {@link org.openstreetmap.josm.gui.mappaint.mapcss.Selector.GeneralSelector} and
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396 | * {@link org.openstreetmap.josm.gui.mappaint.mapcss.Selector.LinkSelector}.
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397 | * @since 5841
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398 | */
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399 | public abstract static class AbstractSelector implements Selector {
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400 |
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401 | protected final List<Condition> conds;
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402 |
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403 | protected AbstractSelector(List<Condition> conditions) {
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404 | if (conditions == null || conditions.isEmpty()) {
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405 | this.conds = null;
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406 | } else {
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407 | this.conds = conditions;
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408 | }
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409 | }
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410 |
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411 | /**
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412 | * Determines if all conditions match the given environment.
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413 | * @param env The environment to check
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414 | * @return {@code true} if all conditions apply, false otherwise.
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415 | */
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416 | public boolean matches(Environment env) {
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417 | if (conds == null) return true;
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418 | for (Condition c : conds) {
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419 | try {
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420 | if (!c.applies(env)) return false;
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421 | } catch (PatternSyntaxException e) {
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422 | Main.error("PatternSyntaxException while applying condition" + c +": "+e.getMessage());
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423 | return false;
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424 | }
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425 | }
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426 | return true;
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427 | }
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428 |
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429 | public List<Condition> getConditions() {
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430 | if (conds == null) {
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431 | return Collections.emptyList();
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432 | }
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433 | return Collections.unmodifiableList(conds);
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434 | }
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435 | }
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436 |
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437 | public static class LinkSelector extends AbstractSelector {
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438 |
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439 | public LinkSelector(List<Condition> conditions) {
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440 | super(conditions);
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441 | }
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442 |
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443 | @Override
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444 | public boolean matches(Environment env) {
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445 | Utils.ensure(env.isLinkContext(), "Requires LINK context in environment, got ''{0}''", env.getContext());
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446 | return super.matches(env);
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447 | }
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448 |
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449 | @Override
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450 | public String getSubpart() {
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451 | throw new UnsupportedOperationException("Not supported yet.");
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452 | }
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453 |
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454 | @Override
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455 | public Range getRange() {
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456 | throw new UnsupportedOperationException("Not supported yet.");
|
---|
457 | }
|
---|
458 |
|
---|
459 | @Override
|
---|
460 | public Selector optimizedBaseCheck() {
|
---|
461 | throw new UnsupportedOperationException();
|
---|
462 | }
|
---|
463 |
|
---|
464 | @Override
|
---|
465 | public String toString() {
|
---|
466 | return "LinkSelector{" + "conditions=" + conds + '}';
|
---|
467 | }
|
---|
468 | }
|
---|
469 |
|
---|
470 | public static class GeneralSelector extends OptimizedGeneralSelector {
|
---|
471 |
|
---|
472 | public GeneralSelector(String base, Pair<Integer, Integer> zoom, List<Condition> conds, String subpart) {
|
---|
473 | super(base, zoom, conds, subpart);
|
---|
474 | }
|
---|
475 |
|
---|
476 | public boolean matchesConditions(Environment e) {
|
---|
477 | return super.matches(e);
|
---|
478 | }
|
---|
479 |
|
---|
480 | @Override
|
---|
481 | public Selector optimizedBaseCheck() {
|
---|
482 | return new OptimizedGeneralSelector(this);
|
---|
483 | }
|
---|
484 |
|
---|
485 | @Override
|
---|
486 | public boolean matches(Environment e) {
|
---|
487 | return matchesBase(e) && super.matches(e);
|
---|
488 | }
|
---|
489 | }
|
---|
490 |
|
---|
491 | public static class OptimizedGeneralSelector extends AbstractSelector {
|
---|
492 | public final String base;
|
---|
493 | public final Range range;
|
---|
494 | public final String subpart;
|
---|
495 |
|
---|
496 | public OptimizedGeneralSelector(String base, Pair<Integer, Integer> zoom, List<Condition> conds, String subpart) {
|
---|
497 | super(conds);
|
---|
498 | this.base = base;
|
---|
499 | if (zoom != null) {
|
---|
500 | int a = zoom.a == null ? 0 : zoom.a;
|
---|
501 | int b = zoom.b == null ? Integer.MAX_VALUE : zoom.b;
|
---|
502 | if (a <= b) {
|
---|
503 | range = fromLevel(a, b);
|
---|
504 | } else {
|
---|
505 | range = Range.ZERO_TO_INFINITY;
|
---|
506 | }
|
---|
507 | } else {
|
---|
508 | range = Range.ZERO_TO_INFINITY;
|
---|
509 | }
|
---|
510 | this.subpart = subpart;
|
---|
511 | }
|
---|
512 |
|
---|
513 | public OptimizedGeneralSelector(String base, Range range, List<Condition> conds, String subpart) {
|
---|
514 | super(conds);
|
---|
515 | this.base = base;
|
---|
516 | this.range = range;
|
---|
517 | this.subpart = subpart;
|
---|
518 | }
|
---|
519 |
|
---|
520 | public OptimizedGeneralSelector(GeneralSelector s) {
|
---|
521 | this(s.base, s.range, s.conds, s.subpart);
|
---|
522 | }
|
---|
523 |
|
---|
524 | @Override
|
---|
525 | public String getSubpart() {
|
---|
526 | return subpart;
|
---|
527 | }
|
---|
528 |
|
---|
529 | @Override
|
---|
530 | public Range getRange() {
|
---|
531 | return range;
|
---|
532 | }
|
---|
533 |
|
---|
534 | public String getBase() {
|
---|
535 | return base;
|
---|
536 | }
|
---|
537 |
|
---|
538 | public boolean matchesBase(OsmPrimitiveType type) {
|
---|
539 | if ("*".equals(base)) {
|
---|
540 | return true;
|
---|
541 | } else if (OsmPrimitiveType.NODE.equals(type)) {
|
---|
542 | return "node".equals(base);
|
---|
543 | } else if (OsmPrimitiveType.WAY.equals(type)) {
|
---|
544 | return "way".equals(base) || "area".equals(base);
|
---|
545 | } else if (OsmPrimitiveType.RELATION.equals(type)) {
|
---|
546 | return "area".equals(base) || "relation".equals(base) || "canvas".equals(base);
|
---|
547 | }
|
---|
548 | return false;
|
---|
549 | }
|
---|
550 |
|
---|
551 | public boolean matchesBase(OsmPrimitive p) {
|
---|
552 | if (!matchesBase(p.getType())) {
|
---|
553 | return false;
|
---|
554 | } else {
|
---|
555 | if (p instanceof Relation) {
|
---|
556 | if ("area".equals(base)) {
|
---|
557 | return ((Relation) p).isMultipolygon();
|
---|
558 | } else if ("canvas".equals(base)) {
|
---|
559 | return p.get("#canvas") != null;
|
---|
560 | }
|
---|
561 | }
|
---|
562 | return true;
|
---|
563 | }
|
---|
564 | }
|
---|
565 |
|
---|
566 | public boolean matchesBase(Environment e) {
|
---|
567 | return matchesBase(e.osm);
|
---|
568 | }
|
---|
569 |
|
---|
570 | @Override
|
---|
571 | public Selector optimizedBaseCheck() {
|
---|
572 | throw new UnsupportedOperationException();
|
---|
573 | }
|
---|
574 |
|
---|
575 | public static Range fromLevel(int a, int b) {
|
---|
576 | if (a > b)
|
---|
577 | throw new AssertionError();
|
---|
578 | double lower = 0;
|
---|
579 | double upper = Double.POSITIVE_INFINITY;
|
---|
580 | if (b != Integer.MAX_VALUE) {
|
---|
581 | lower = level2scale(b + 1);
|
---|
582 | }
|
---|
583 | if (a != 0) {
|
---|
584 | upper = level2scale(a);
|
---|
585 | }
|
---|
586 | return new Range(lower, upper);
|
---|
587 | }
|
---|
588 |
|
---|
589 | static final double R = 6378135;
|
---|
590 |
|
---|
591 | public static double level2scale(int lvl) {
|
---|
592 | if (lvl < 0)
|
---|
593 | throw new IllegalArgumentException();
|
---|
594 | // preliminary formula - map such that mapnik imagery tiles of the same
|
---|
595 | // or similar level are displayed at the given scale
|
---|
596 | return 2.0 * Math.PI * R / Math.pow(2.0, lvl) / 2.56;
|
---|
597 | }
|
---|
598 |
|
---|
599 | public static int scale2level(double scale) {
|
---|
600 | if (scale < 0)
|
---|
601 | throw new IllegalArgumentException();
|
---|
602 | return (int) Math.floor(Math.log(2 * Math.PI * R / 2.56 / scale) / Math.log(2));
|
---|
603 | }
|
---|
604 |
|
---|
605 | @Override
|
---|
606 | public String toString() {
|
---|
607 | return base + (Range.ZERO_TO_INFINITY.equals(range) ? "" : range) + Utils.join("", conds) + (subpart != null ? ("::" + subpart) : "");
|
---|
608 | }
|
---|
609 | }
|
---|
610 | }
|
---|