1 | // License: GPL. For details, see LICENSE file.
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2 | package org.openstreetmap.josm.gui.conflict.tags;
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3 |
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4 | import java.util.Collection;
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5 |
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6 | import org.openstreetmap.josm.data.osm.OsmPrimitive;
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7 | import org.openstreetmap.josm.data.osm.Tag;
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8 | import org.openstreetmap.josm.data.osm.TagCollection;
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9 | import org.openstreetmap.josm.data.osm.TigerUtils;
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10 |
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11 | /**
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12 | * Collection of utility methods for tag conflict resolution
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13 | *
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14 | */
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15 | public class TagConflictResolutionUtil {
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16 |
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17 | /** no constructor, just static utility methods */
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18 | private TagConflictResolutionUtil() {}
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19 |
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20 | /**
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21 | * Normalizes the tags in the tag collection <code>tc</code> before resolving tag conflicts.
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22 | *
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23 | * Removes irrelevant tags like "created_by".
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24 | *
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25 | * For tags which are not present on at least one of the merged nodes, the empty value ""
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26 | * is added to the list of values for this tag, but only if there are at least two
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27 | * primitives with tags.
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28 | *
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29 | * @param tc the tag collection
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30 | * @param merged the collection of merged primitives
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31 | */
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32 | public static void normalizeTagCollectionBeforeEditing(TagCollection tc, Collection<? extends OsmPrimitive> merged) {
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33 | // remove irrelevant tags
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34 | //
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35 | for(String key : OsmPrimitive.getDiscardableKeys()) {
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36 | tc.removeByKey(key);
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37 | }
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38 |
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39 | int numNodesWithTags = 0;
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40 | for (OsmPrimitive p: merged) {
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41 | if (!p.getKeys().isEmpty()) {
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42 | numNodesWithTags++;
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43 | }
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44 | }
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45 | if (numNodesWithTags <= 1)
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46 | return;
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47 |
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48 | for (String key: tc.getKeys()) {
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49 | // make sure the empty value is in the tag set if a tag is not present
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50 | // on all merged nodes
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51 | //
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52 | for (OsmPrimitive p: merged) {
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53 | if (p.get(key) == null) {
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54 | tc.add(new Tag(key, "")); // add a tag with key and empty value
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55 | }
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56 | }
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57 | }
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58 | }
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59 |
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60 | /**
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61 | * Combines tags from TIGER data
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62 | *
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63 | * @param tc the tag collection
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64 | */
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65 | public static void combineTigerTags(TagCollection tc) {
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66 | for (String key: tc.getKeys()) {
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67 | if (TigerUtils.isTigerTag(key)) {
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68 | tc.setUniqueForKey(key, TigerUtils.combineTags(key, tc.getValues(key)));
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69 | }
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70 | }
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71 | }
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72 |
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73 | /**
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74 | * Completes tags in the tag collection <code>tc</code> with the empty value
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75 | * for each tag. If the empty value is present the tag conflict resolution dialog
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76 | * will offer an option for removing the tag and not only options for selecting
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77 | * one of the current values of the tag.
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78 | *
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79 | * @param tc the tag collection
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80 | */
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81 | public static void completeTagCollectionForEditing(TagCollection tc) {
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82 | for (String key: tc.getKeys()) {
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83 | // make sure the empty value is in the tag set such that we can delete the tag
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84 | // in the conflict dialog if necessary
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85 | //
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86 | tc.add(new Tag(key,""));
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87 | }
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88 | }
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89 | }
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