--- /dev/null
+package tim.prune.function;
+
+import java.io.BufferedReader;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.net.URL;
+import java.util.ArrayList;
+
+import javax.xml.parsers.SAXParser;
+import javax.xml.parsers.SAXParserFactory;
+
+import tim.prune.App;
+import tim.prune.I18nManager;
+import tim.prune.data.DataPoint;
+import tim.prune.data.Distance;
+import tim.prune.data.Field;
+import tim.prune.data.Latitude;
+import tim.prune.data.Longitude;
+import tim.prune.data.UnitSetLibrary;
+import tim.prune.function.search.GenericDownloaderFunction;
+import tim.prune.function.search.SearchResult;
+
+/**
+ * Function to load nearby point information from Wikipedia (and Wikimedia)
+ * according to the currently viewed area
+ */
+public class GetWikipediaFunction extends GenericDownloaderFunction
+{
+ /** Maximum number of results to get */
+ private static final int MAX_RESULTS = 20;
+ /** Maximum distance from point in km */
+ private static final int MAX_DISTANCE = 15;
+ /** Username to use for geonames queries */
+ private static final String GEONAMES_USERNAME = "gpsprune";
+
+
+ /**
+ * Constructor
+ * @param inApp App object
+ */
+ public GetWikipediaFunction(App inApp) {
+ super(inApp);
+ }
+
+ /**
+ * @return name key
+ */
+ public String getNameKey() {
+ return "function.getwikipedia";
+ }
+
+ /**
+ * @param inColNum index of column, 0 or 1
+ * @return key for this column
+ */
+ protected String getColumnKey(int inColNum)
+ {
+ if (inColNum == 0) return "dialog.wikipedia.column.name";
+ return "dialog.wikipedia.column.distance";
+ }
+
+
+ /**
+ * Run method to get the nearby points in a separate thread
+ */
+ public void run()
+ {
+ _statusLabel.setText(I18nManager.getText("confirm.running"));
+ // Get coordinates from current point (if any) or from centre of screen
+ double lat = 0.0, lon = 0.0;
+ DataPoint point = _app.getTrackInfo().getCurrentPoint();
+ if (point == null)
+ {
+ double[] coords = _app.getViewport().getBounds();
+ lat = (coords[0] + coords[2]) / 2.0;
+ lon = (coords[1] + coords[3]) / 2.0;
+ }
+ else
+ {
+ lat = point.getLatitude().getDouble();
+ lon = point.getLongitude().getDouble();
+ }
+
+ // Before we ask geonames online, let's get wikimedia galleries first
+ searchWikimediaGalleries(lat, lon);
+
+ // For geonames, firstly try the local language
+ String lang = I18nManager.getText("wikipedia.lang");
+ submitSearch(lat, lon, lang);
+ // If we didn't get anything, try a secondary language
+ if (_trackListModel.isEmpty() && _errorMessage == null && lang.equals("als")) {
+ submitSearch(lat, lon, "de");
+ }
+ // If still nothing then try english
+ if (_trackListModel.isEmpty() && _errorMessage == null && !lang.equals("en")) {
+ submitSearch(lat, lon, "en");
+ }
+
+ // Set status label according to error or "none found", leave blank if ok
+ if (_errorMessage == null && _trackListModel.isEmpty()) {
+ _errorMessage = I18nManager.getText("dialog.wikipedia.nonefound");
+ }
+ _statusLabel.setText(_errorMessage == null ? "" : _errorMessage);
+ }
+
+ /**
+ * Submit the search for the given parameters
+ * @param inLat latitude
+ * @param inLon longitude
+ * @param inLang language code to use, such as en or de
+ */
+ private void submitSearch(double inLat, double inLon, String inLang)
+ {
+ // Example http://api.geonames.org/findNearbyWikipedia?lat=47&lng=9
+ String urlString = "http://api.geonames.org/findNearbyWikipedia?lat=" +
+ inLat + "&lng=" + inLon + "&maxRows=" + MAX_RESULTS
+ + "&radius=" + MAX_DISTANCE + "&lang=" + inLang
+ + "&username=" + GEONAMES_USERNAME;
+ // Parse the returned XML with a special handler
+ GetWikipediaXmlHandler xmlHandler = new GetWikipediaXmlHandler();
+ InputStream inStream = null;
+
+ try
+ {
+ URL url = new URL(urlString);
+ SAXParser saxParser = SAXParserFactory.newInstance().newSAXParser();
+ inStream = url.openStream();
+ saxParser.parse(inStream, xmlHandler);
+ }
+ catch (Exception e) {
+ _errorMessage = e.getClass().getName() + " - " + e.getMessage();
+ }
+ // Close stream and ignore errors
+ try {
+ inStream.close();
+ } catch (Exception e) {}
+ // Add track list to model
+ ArrayList<SearchResult> trackList = xmlHandler.getTrackList();
+ _trackListModel.addTracks(trackList, true);
+
+ // Show error message if any
+ if (_trackListModel.isEmpty())
+ {
+ String error = xmlHandler.getErrorMessage();
+ if (error != null && !error.equals(""))
+ {
+ _app.showErrorMessageNoLookup(getNameKey(), error);
+ _errorMessage = error;
+ }
+ }
+ }
+
+ /**
+ * Load the selected point(s)
+ */
+ protected void loadSelected()
+ {
+ // Find the rows selected in the table and get the corresponding coords
+ int numSelected = _trackTable.getSelectedRowCount();
+ if (numSelected < 1) return;
+ int[] rowNums = _trackTable.getSelectedRows();
+ for (int i=0; i<numSelected; i++)
+ {
+ int rowNum = rowNums[i];
+ if (rowNum >= 0 && rowNum < _trackListModel.getRowCount())
+ {
+ String lat = _trackListModel.getTrack(rowNum).getLatitude();
+ String lon = _trackListModel.getTrack(rowNum).getLongitude();
+ if (lat != null && lon != null)
+ {
+ DataPoint point = new DataPoint(new Latitude(lat), new Longitude(lon), null);
+ point.setFieldValue(Field.WAYPT_NAME, _trackListModel.getTrack(rowNum).getTrackName(), false);
+ _app.createPoint(point);
+ }
+ }
+ }
+ // Close the dialog
+ _cancelled = true;
+ _dialog.dispose();
+ }
+
+ /**
+ * Search the local wikimedia index to see if there are any galleries nearby
+ * @param inLat latitude
+ * @param inLon longitude
+ */
+ private void searchWikimediaGalleries(double inLat, double inLon)
+ {
+ BufferedReader reader = null;
+ try
+ {
+ InputStream in = GetWikipediaFunction.class.getResourceAsStream("/tim/prune/function/search/wikimedia_galleries.txt");
+ reader = new BufferedReader(new InputStreamReader(in));
+
+ ArrayList<SearchResult> trackList = new ArrayList<SearchResult>();
+ DataPoint herePoint = new DataPoint(new Latitude(inLat, Latitude.FORMAT_DEG), new Longitude(inLon, Longitude.FORMAT_DEG), null);
+ // Loop through the file line by line, looking for nearby points
+ String line = null;
+ while ((line = reader.readLine()) != null)
+ {
+ String[] lineComps = line.split("\t");
+ if (lineComps.length == 4)
+ {
+ DataPoint p = new DataPoint(new Latitude(lineComps[2]), new Longitude(lineComps[3]), null);
+ double distFromHere = Distance.convertRadiansToDistance(
+ DataPoint.calculateRadiansBetween(p, herePoint), UnitSetLibrary.UNITS_KILOMETRES);
+ if (distFromHere < MAX_DISTANCE)
+ {
+ SearchResult gallery = new SearchResult();
+ gallery.setTrackName(I18nManager.getText("dialog.wikipedia.gallery") + ": " + lineComps[0]);
+ gallery.setDescription(lineComps[1]);
+ gallery.setLatitude(lineComps[2]);
+ gallery.setLongitude(lineComps[3]);
+ gallery.setWebUrl("https://commons.wikimedia.org/wiki/" + lineComps[0]);
+ gallery.setLength(distFromHere * 1000.0); // convert from km to m
+ trackList.add(gallery);
+ }
+ }
+ }
+ _trackListModel.addTracks(trackList, true);
+ }
+ catch (java.io.IOException e) {
+ System.err.println("Exception trying to read wikimedia file : " + e.getMessage());
+ }
+ catch (NullPointerException e) {
+ System.err.println("Couldn't find wikimedia file : " + e.getMessage());
+ }
+ finally
+ {
+ try {
+ reader.close();
+ }
+ catch (Exception e) {} // ignore
+ }
+ }
+}
projects / GpsPrune.git / blobdiff