altoslib: Clean up map file and url handling

[fw/altos] / altoslib / AltosMapStore.java

diff --git a/altoslib/AltosMapStore.java b/altoslib/AltosMapStore.java
index aed365ca175e07ea81abe05b7535b707227887dd..ca4c9c75a40a5cb39942994c5ebdc7feaf3138ec 100644 (file)
--- a/altoslib/AltosMapStore.java
+++ b/altoslib/AltosMapStore.java
@@ -28,6 +28,45 @@ public class AltosMapStore {
 
        int                                     status;
 
+       private static File map_file(AltosLatLon center, int zoom, int maptype, int px_size, int scale) {
+               double lat = center.lat;
+               double lon = center.lon;
+               char chlat = lat < 0 ? 'S' : 'N';
+               char chlon = lon < 0 ? 'W' : 'E';
+
+               if (lat < 0) lat = -lat;
+               if (lon < 0) lon = -lon;
+               String maptype_string = String.format("%s-", AltosMap.maptype_names[maptype]);
+               String format_string;
+               if (maptype == AltosMap.maptype_hybrid || maptype == AltosMap.maptype_satellite || maptype == AltosMap.maptype_terrain)
+                       format_string = "jpg";
+               else
+                       format_string = "png";
+               return new File(AltosPreferences.mapdir(),
+                               String.format("map-%c%.6f,%c%.6f-%s%d%s.%s",
+                                             chlat, lat, chlon, lon, maptype_string, zoom, scale == 1 ? "" : String.format("-%d", scale), format_string));
+       }
+
+       private static String map_url(AltosLatLon center, int zoom, int maptype, int px_size, int scale) {
+               String format_string;
+               int z = zoom;
+
+               if (maptype == AltosMap.maptype_hybrid || maptype == AltosMap.maptype_satellite || maptype == AltosMap.maptype_terrain)
+                       format_string = "jpg";
+               else
+                       format_string = "png32";
+
+               for (int s = 1; s < scale; s <<= 1)
+                       z--;
+
+               if (AltosVersion.has_google_maps_api_key())
+                       return String.format("http://maps.google.com/maps/api/staticmap?center=%.6f,%.6f&zoom=%d&size=%dx%d&scale=%d&sensor=false&maptype=%s&format=%s&key=%s",
+                                            center.lat, center.lon, z, px_size/scale, px_size/scale, scale, AltosMap.maptype_names[maptype], format_string, AltosVersion.google_maps_api_key);
+               else
+                       return String.format("http://maps.google.com/maps/api/staticmap?center=%.6f,%.6f&zoom=%d&size=%dx%d&scale=%d&sensor=false&maptype=%s&format=%s",
+                                            center.lat, center.lon, z, px_size/scale, px_size/scale, AltosMap.maptype_names[maptype], format_string);
+       }
+
        public int status() {
                return status;
        }
@@ -229,16 +268,19 @@ public class AltosMapStore {
 
        static HashMap<String,AltosMapStore> stores = new HashMap<String,AltosMapStore>();
 
-       public static AltosMapStore get(String url, File file) {
+       public static AltosMapStore get(AltosLatLon center, int zoom, int maptype, int px_size, int scale) {
+               String url = map_url(center, zoom, maptype, px_size, scale);
+
                AltosMapStore   store;
                synchronized(stores) {
                        if (stores.containsKey(url)) {
                                store = stores.get(url);
                        } else {
-                               store = new AltosMapStore(url, file);
+                               store = new AltosMapStore(url, map_file(center, zoom, maptype, px_size, scale));
                                stores.put(url, store);
                        }
                }
                return store;
        }
+
 }