content: // License: GPL. For details, see Readme.txt file.
  package amodeus.amodeus.view.jmapviewer.tilesources;
  
  import java.awt.Image;
  
  import amodeus.amodeus.view.jmapviewer.interfaces.ICoordinate;
  
  /** Abstract class for OSM Tile sources */
  abstract class AbstractOsmTileSource extends TMSTileSource {
  
      /** The OSM attribution. Must be always in line with
       * <a href="https://www.openstreetmap.org/copyright/en">https://www.openstreetmap.org/copyright/en</a> */
      public static final String DEFAULT_OSM_ATTRIBUTION = "\u00a9 OpenStreetMap contributors";
  
      /** Constructs a new OSM tile source
       * 
       * @param name
       *            Source name as displayed in GUI
       * @param baseUrl
       *            Source URL
       * @param id
       *            unique id for the tile source; contains only characters that
       *            are safe for file names; can be null */
      public AbstractOsmTileSource(String name, String baseUrl, String id) {
          super(new TileSourceInfo(name, baseUrl, id));
      }
  
      @Override
      public int getMaxZoom() {
          return 19;
      }
  
      @Override
      public boolean requiresAttribution() {
          return true;
      }
  
      @Override
      public String getAttributionText(int zoom, ICoordinate topLeft, ICoordinate botRight) {
          return DEFAULT_OSM_ATTRIBUTION;
      }
  
      @Override
      public String getAttributionLinkURL() {
          return "https://openstreetmap.org/";
      }
  
      @Override
      public Image getAttributionImage() {
          return null;
      }
  
      @Override
      public String getAttributionImageURL() {
          return null;
      }
  
      @Override
      public String getTermsOfUseText() {
          return null;
      }
  
      @Override
      public String getTermsOfUseURL() {
          return "https://www.openstreetmap.org/copyright";
      }
  }
  