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("geo:(?<lat>[+-]?[0-9.]+),(?<lon>[+-]?[0-9.]+)(\\?z=(?<zoom>[0-9]+))?");
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22 |
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23 | private GeoUrlToBounds() {
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24 | // Hide default constructor for utils classes
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25 | }
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26 |
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27 | /**
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28 | * 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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29 | * @param url the URL to be parsed
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30 | * @return the parsed {@link Bounds}
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31 | */
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32 | public static Bounds parse(final String url) {
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33 | CheckParameterUtil.ensureParameterNotNull(url, "url");
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34 | final Matcher m = PATTERN.matcher(url);
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35 | if (m.matches()) {
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36 | final double lat;
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37 | final double lon;
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38 | final int zoom;
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39 | try {
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40 | lat = Double.parseDouble(m.group("lat"));
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41 | } catch (NumberFormatException e) {
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42 | Logging.warn(tr("URL does not contain valid {0}", tr("latitude")), e);
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43 | return null;
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44 | }
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45 | try {
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46 | lon = Double.parseDouble(m.group("lon"));
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47 | } catch (NumberFormatException e) {
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48 | Logging.warn(tr("URL does not contain valid {0}", tr("longitude")), e);
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49 | return null;
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50 | }
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51 | try {
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52 | zoom = m.group("zoom") != null ? Integer.parseInt(m.group("zoom")) : 18;
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53 | } catch (NumberFormatException e) {
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54 | Logging.warn(tr("URL does not contain valid {0}", tr("zoom")), e);
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55 | return null;
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56 | }
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57 | return OsmUrlToBounds.positionToBounds(lat, lon, zoom);
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58 | } else {
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59 | return null;
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60 | }
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61 | }
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62 | }
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