[3987] | 1 | // License: GPL. For details, see LICENSE file.
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[9278] | 2 | package org.openstreetmap.josm.gui.mappaint.styleelement;
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[3987] | 3 |
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| 4 | import java.util.ArrayList;
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| 5 | import java.util.Arrays;
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| 6 | import java.util.Collections;
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| 7 | import java.util.List;
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[9371] | 8 | import java.util.Objects;
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[3987] | 9 |
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| 10 | import org.openstreetmap.josm.Main;
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[8973] | 11 | import org.openstreetmap.josm.data.Preferences.PreferenceChangeEvent;
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| 12 | import org.openstreetmap.josm.data.Preferences.PreferenceChangedListener;
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[3987] | 13 | import org.openstreetmap.josm.data.osm.OsmPrimitive;
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| 14 | import org.openstreetmap.josm.tools.LanguageInfo;
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| 15 |
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| 16 | /**
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| 17 | * <p>Provides an abstract parent class and three concrete sub classes for various
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| 18 | * strategies on how to compose the text label which can be rendered close to a node
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| 19 | * or within an area in an OSM map.</p>
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[6070] | 20 | *
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[3987] | 21 | * <p>The three strategies below support three rules for composing a label:
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| 22 | * <ul>
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| 23 | * <li>{@link StaticLabelCompositionStrategy} - the label is given by a static text
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| 24 | * specified in the MapCSS style file</li>
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[6070] | 25 | *
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[3987] | 26 | * <li>{@link TagLookupCompositionStrategy} - the label is given by the content of a
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| 27 | * tag whose name specified in the MapCSS style file</li>
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[6070] | 28 | *
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[3987] | 29 | * <li>{@link DeriveLabelFromNameTagsCompositionStrategy} - the label is given by the value
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[11615] | 30 | * of one of the configured "name tags". The list of relevant name tags can be configured
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[3987] | 31 | * in the JOSM preferences
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[11615] | 32 | * see the preference options <tt>mappaint.nameOrder</tt> and <tt>mappaint.nameComplementOrder</tt>.</li>
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[3987] | 33 | * </ul>
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[10599] | 34 | * @since 3987 (creation)
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| 35 | * @since 10599 (functional interface)
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[3987] | 36 | */
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[10599] | 37 | @FunctionalInterface
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| 38 | public interface LabelCompositionStrategy {
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[3987] | 39 |
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| 40 | /**
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| 41 | * Replies the text value to be rendered as label for the primitive {@code primitive}.
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| 42 | *
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| 43 | * @param primitive the primitive
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| 44 | *
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| 45 | * @return the text value to be rendered or null, if primitive is null or
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| 46 | * if no suitable value could be composed
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| 47 | */
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[10599] | 48 | String compose(OsmPrimitive primitive);
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[3987] | 49 |
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[11615] | 50 | /**
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| 51 | * Strategy where the label is given by a static text specified in the MapCSS style file.
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| 52 | */
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[10599] | 53 | class StaticLabelCompositionStrategy implements LabelCompositionStrategy {
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[9078] | 54 | private final String defaultLabel;
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[4007] | 55 |
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[8510] | 56 | public StaticLabelCompositionStrategy(String defaultLabel) {
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[3987] | 57 | this.defaultLabel = defaultLabel;
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| 58 | }
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| 59 |
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| 60 | @Override
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| 61 | public String compose(OsmPrimitive primitive) {
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| 62 | return defaultLabel;
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| 63 | }
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| 64 |
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| 65 | public String getDefaultLabel() {
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| 66 | return defaultLabel;
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| 67 | }
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| 68 |
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| 69 | @Override
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| 70 | public String toString() {
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[8846] | 71 | return '{' + getClass().getSimpleName() + " defaultLabel=" + defaultLabel + '}';
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[3987] | 72 | }
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| 73 |
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| 74 | @Override
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| 75 | public int hashCode() {
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[9371] | 76 | return Objects.hash(defaultLabel);
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[3987] | 77 | }
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| 78 |
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| 79 | @Override
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| 80 | public boolean equals(Object obj) {
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[9371] | 81 | if (this == obj) return true;
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| 82 | if (obj == null || getClass() != obj.getClass()) return false;
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| 83 | StaticLabelCompositionStrategy that = (StaticLabelCompositionStrategy) obj;
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| 84 | return Objects.equals(defaultLabel, that.defaultLabel);
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[3987] | 85 | }
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| 86 | }
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| 87 |
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[11615] | 88 | /**
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| 89 | * Strategy where the label is given by the content of a tag whose name specified in the MapCSS style file.
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| 90 | */
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[10599] | 91 | class TagLookupCompositionStrategy implements LabelCompositionStrategy {
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[3987] | 92 |
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[9078] | 93 | private final String defaultLabelTag;
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[8510] | 94 |
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| 95 | public TagLookupCompositionStrategy(String defaultLabelTag) {
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[3987] | 96 | if (defaultLabelTag != null) {
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| 97 | defaultLabelTag = defaultLabelTag.trim();
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| 98 | if (defaultLabelTag.isEmpty()) {
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| 99 | defaultLabelTag = null;
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| 100 | }
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| 101 | }
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| 102 | this.defaultLabelTag = defaultLabelTag;
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| 103 | }
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| 104 |
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| 105 | @Override
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| 106 | public String compose(OsmPrimitive primitive) {
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| 107 | if (defaultLabelTag == null) return null;
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| 108 | if (primitive == null) return null;
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| 109 | return primitive.get(defaultLabelTag);
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| 110 | }
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| 111 |
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| 112 | public String getDefaultLabelTag() {
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| 113 | return defaultLabelTag;
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| 114 | }
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| 115 |
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| 116 | @Override
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| 117 | public String toString() {
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[8846] | 118 | return '{' + getClass().getSimpleName() + " defaultLabelTag=" + defaultLabelTag + '}';
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[3987] | 119 | }
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| 120 |
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| 121 | @Override
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| 122 | public int hashCode() {
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[9371] | 123 | return Objects.hash(defaultLabelTag);
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[3987] | 124 | }
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| 125 |
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| 126 | @Override
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| 127 | public boolean equals(Object obj) {
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[9371] | 128 | if (this == obj) return true;
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| 129 | if (obj == null || getClass() != obj.getClass()) return false;
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| 130 | TagLookupCompositionStrategy that = (TagLookupCompositionStrategy) obj;
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| 131 | return Objects.equals(defaultLabelTag, that.defaultLabelTag);
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[3987] | 132 | }
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| 133 | }
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| 134 |
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[11615] | 135 | /**
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| 136 | * Strategy where the label is given by the value of one of the configured "name tags".
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| 137 | * The list of relevant name tags can be configured in the JOSM preferences
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| 138 | * see the preference options <tt>mappaint.nameOrder</tt> and <tt>mappaint.nameComplementOrder</tt>
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| 139 | */
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[10599] | 140 | class DeriveLabelFromNameTagsCompositionStrategy implements LabelCompositionStrategy, PreferenceChangedListener {
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[3987] | 141 |
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| 142 | /**
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| 143 | * The list of default name tags from which a label candidate is derived.
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| 144 | */
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[6623] | 145 | private static final String[] DEFAULT_NAME_TAGS = {
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[3987] | 146 | "name:" + LanguageInfo.getJOSMLocaleCode(),
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| 147 | "name",
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| 148 | "int_name",
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[8726] | 149 | "distance",
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[3987] | 150 | "ref",
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| 151 | "operator",
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| 152 | "brand",
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[8726] | 153 | "addr:housenumber"
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[3987] | 154 | };
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| 155 |
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[6541] | 156 | /**
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| 157 | * The list of default name complement tags from which a label candidate is derived.
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| 158 | */
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[6623] | 159 | private static final String[] DEFAULT_NAME_COMPLEMENT_TAGS = {
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[6541] | 160 | "capacity"
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| 161 | };
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[3987] | 162 |
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[7005] | 163 | private List<String> nameTags = new ArrayList<>();
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| 164 | private List<String> nameComplementTags = new ArrayList<>();
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[6541] | 165 |
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[3987] | 166 | /**
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| 167 | * <p>Creates the strategy and initializes its name tags from the preferences.</p>
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| 168 | */
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| 169 | public DeriveLabelFromNameTagsCompositionStrategy() {
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| 170 | initNameTagsFromPreferences();
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| 171 | }
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| 172 |
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[6541] | 173 | private static List<String> buildNameTags(List<String> nameTags) {
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[8338] | 174 | List<String> result = new ArrayList<>();
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[11553] | 175 | if (nameTags != null) {
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| 176 | for (String tag: nameTags) {
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| 177 | if (tag == null) {
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| 178 | continue;
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| 179 | }
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| 180 | tag = tag.trim();
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| 181 | if (tag.isEmpty()) {
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| 182 | continue;
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| 183 | }
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| 184 | result.add(tag);
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[3987] | 185 | }
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| 186 | }
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[6541] | 187 | return result;
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[3987] | 188 | }
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[6830] | 189 |
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[6541] | 190 | /**
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| 191 | * Sets the name tags to be looked up in order to build up the label.
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| 192 | *
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| 193 | * @param nameTags the name tags. null values are ignored.
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| 194 | */
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[8510] | 195 | public void setNameTags(List<String> nameTags) {
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[6541] | 196 | this.nameTags = buildNameTags(nameTags);
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| 197 | }
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[3987] | 198 |
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| 199 | /**
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[6541] | 200 | * Sets the name complement tags to be looked up in order to build up the label.
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| 201 | *
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| 202 | * @param nameComplementTags the name complement tags. null values are ignored.
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| 203 | * @since 6541
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| 204 | */
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[8510] | 205 | public void setNameComplementTags(List<String> nameComplementTags) {
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[6541] | 206 | this.nameComplementTags = buildNameTags(nameComplementTags);
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| 207 | }
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[6830] | 208 |
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[6541] | 209 | /**
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[3987] | 210 | * Replies an unmodifiable list of the name tags used to compose the label.
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[6070] | 211 | *
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[3987] | 212 | * @return the list of name tags
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| 213 | */
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| 214 | public List<String> getNameTags() {
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| 215 | return Collections.unmodifiableList(nameTags);
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| 216 | }
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| 217 |
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| 218 | /**
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[6541] | 219 | * Replies an unmodifiable list of the name complement tags used to compose the label.
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| 220 | *
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| 221 | * @return the list of name complement tags
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| 222 | * @since 6541
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| 223 | */
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| 224 | public List<String> getNameComplementTags() {
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| 225 | return Collections.unmodifiableList(nameComplementTags);
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| 226 | }
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| 227 |
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| 228 | /**
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[3987] | 229 | * Initializes the name tags to use from a list of default name tags (see
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[6541] | 230 | * {@link #DEFAULT_NAME_TAGS} and {@link #DEFAULT_NAME_COMPLEMENT_TAGS})
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| 231 | * and from name tags configured in the preferences using the keys
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| 232 | * <tt>mappaint.nameOrder</tt> and <tt>mappaint.nameComplementOrder</tt>.
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[3987] | 233 | */
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[6890] | 234 | public final void initNameTagsFromPreferences() {
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[8510] | 235 | if (Main.pref == null) {
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[7005] | 236 | this.nameTags = new ArrayList<>(Arrays.asList(DEFAULT_NAME_TAGS));
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| 237 | this.nameComplementTags = new ArrayList<>(Arrays.asList(DEFAULT_NAME_COMPLEMENT_TAGS));
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[3987] | 238 | } else {
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[7005] | 239 | this.nameTags = new ArrayList<>(
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[3987] | 240 | Main.pref.getCollection("mappaint.nameOrder", Arrays.asList(DEFAULT_NAME_TAGS))
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| 241 | );
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[7005] | 242 | this.nameComplementTags = new ArrayList<>(
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[6541] | 243 | Main.pref.getCollection("mappaint.nameComplementOrder", Arrays.asList(DEFAULT_NAME_COMPLEMENT_TAGS))
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| 244 | );
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[3987] | 245 | }
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| 246 | }
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| 247 |
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| 248 | private String getPrimitiveName(OsmPrimitive n) {
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[8849] | 249 | StringBuilder name = new StringBuilder();
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[3987] | 250 | if (!n.hasKeys()) return null;
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| 251 | for (String rn : nameTags) {
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[8849] | 252 | String val = n.get(rn);
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| 253 | if (val != null) {
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| 254 | name.append(val);
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[6541] | 255 | break;
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| 256 | }
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[3987] | 257 | }
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[6541] | 258 | for (String rn : nameComplementTags) {
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| 259 | String comp = n.get(rn);
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| 260 | if (comp != null) {
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[8849] | 261 | if (name.length() == 0) {
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| 262 | name.append(comp);
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[6541] | 263 | } else {
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[8849] | 264 | name.append(" (").append(comp).append(')');
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[6541] | 265 | }
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| 266 | break;
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| 267 | }
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| 268 | }
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[8849] | 269 | return name.toString();
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[3987] | 270 | }
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| 271 |
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| 272 | @Override
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| 273 | public String compose(OsmPrimitive primitive) {
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| 274 | if (primitive == null) return null;
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| 275 | return getPrimitiveName(primitive);
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| 276 | }
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| 277 |
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| 278 | @Override
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| 279 | public String toString() {
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[10300] | 280 | return '{' + getClass().getSimpleName() + '}';
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[3987] | 281 | }
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[8973] | 282 |
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| 283 | @Override
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| 284 | public void preferenceChanged(PreferenceChangeEvent e) {
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| 285 | if (e.getKey() != null && e.getKey().startsWith("mappaint.name")) {
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| 286 | initNameTagsFromPreferences();
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| 287 | }
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| 288 | }
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[3987] | 289 | }
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| 290 | }
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