| 1 | // License: GPL. For details, see LICENSE file.
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| 2 | package org.openstreetmap.josm.tools;
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| 3 |
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| 4 | import static org.openstreetmap.josm.tools.I18n.tr;
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| 5 |
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| 6 | import java.util.regex.Matcher;
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| 7 | import java.util.regex.Pattern;
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| 8 |
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| 9 | import org.openstreetmap.josm.data.Bounds;
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| 10 |
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| 11 | /**
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| 12 | * Parses a Geo URL (as specified in <a href="https://tools.ietf.org/html/rfc5870">RFC 5870</a>) into {@link Bounds}.
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| 13 | *
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| 14 | * Note that Geo URLs are also handled by {@link OsmUrlToBounds}.
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| 15 | */
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| 16 | public final class GeoUrlToBounds {
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| 17 |
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| 18 | /**
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| 19 | * The pattern of a geo: url, having named match groups.
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| 20 | */
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| 21 | public static final Pattern PATTERN = Pattern.compile(
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| 22 | "geo:(?<lat>[+-]?[0-9.]+),(?<lon>[+-]?[0-9.]+)(?<crs>;crs=wgs84)?(?<uncertainty>;u=[0-9.]+)?(\\?z=(?<zoom>[0-9]+))?");
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| 23 |
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| 24 | private GeoUrlToBounds() {
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| 25 | // Hide default constructor for utils classes
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| 26 | }
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| 27 |
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| 28 | /**
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| 29 | * Parses a Geo URL (as specified in <a href="https://tools.ietf.org/html/rfc5870">RFC 5870</a>) into {@link Bounds}.
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| 30 | * @param url the URL to be parsed
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| 31 | * @return the parsed {@link Bounds}
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| 32 | */
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| 33 | public static Bounds parse(final String url) {
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| 34 | CheckParameterUtil.ensureParameterNotNull(url, "url");
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| 35 | final Matcher m = PATTERN.matcher(url);
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| 36 | if (m.matches()) {
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| 37 | final double lat;
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| 38 | final double lon;
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| 39 | final int zoom;
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| 40 | try {
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| 41 | lat = Double.parseDouble(m.group("lat"));
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| 42 | } catch (NumberFormatException e) {
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| 43 | Logging.warn(tr("URL does not contain valid {0}", tr("latitude")), e);
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| 44 | return null;
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| 45 | }
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| 46 | try {
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| 47 | lon = Double.parseDouble(m.group("lon"));
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| 48 | } catch (NumberFormatException e) {
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| 49 | Logging.warn(tr("URL does not contain valid {0}", tr("longitude")), e);
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| 50 | return null;
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| 51 | }
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| 52 | try {
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| 53 | zoom = m.group("zoom") != null ? Integer.parseInt(m.group("zoom")) : 18;
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| 54 | } catch (NumberFormatException e) {
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| 55 | Logging.warn(tr("URL does not contain valid {0}", tr("zoom")), e);
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| 56 | return null;
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| 57 | }
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| 58 | return OsmUrlToBounds.positionToBounds(lat, lon, zoom);
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| 59 | } else {
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| 60 | return null;
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| 61 | }
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| 62 | }
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| 63 | }
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