/MapView/Map/RMMBTilesTileSource.m
http://github.com/route-me/route-me · Objective C · 339 lines · 214 code · 92 blank · 33 comment · 22 complexity · 386c95b2559cbe72705e4a7bdb20a0d8 MD5 · raw file
- //
- // RMMBTilesTileSource.m
- //
- // Created by Justin R. Miller on 6/18/10.
- // Copyright 2010, Code Sorcery Workshop, LLC and Development Seed, Inc.
- // All rights reserved.
- //
- // Redistribution and use in source and binary forms, with or without
- // modification, are permitted provided that the following conditions are met:
- //
- // * Redistributions of source code must retain the above copyright
- // notice, this list of conditions and the following disclaimer.
- //
- // * Redistributions in binary form must reproduce the above copyright
- // notice, this list of conditions and the following disclaimer in the
- // documentation and/or other materials provided with the distribution.
- //
- // * Neither the names of Code Sorcery Workshop, LLC or Development Seed,
- // Inc., nor the names of its contributors may be used to endorse or
- // promote products derived from this software without specific prior
- // written permission.
- //
- // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
- // ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
- // WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- // DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
- // ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
- // (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- // LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
- // ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
- // SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- //
- #import "RMMBTilesTileSource.h"
- #import "RMTileImage.h"
- #import "RMProjection.h"
- #import "RMFractalTileProjection.h"
- #import "FMDatabase.h"
- @implementation RMMBTilesTileSource
- - (id)initWithTileSetURL:(NSURL *)tileSetURL
- {
- if ( ! [super init])
- return nil;
-
- tileProjection = [[RMFractalTileProjection alloc] initFromProjection:[self projection]
- tileSideLength:kMBTilesDefaultTileSize
- maxZoom:kMBTilesDefaultMaxTileZoom
- minZoom:kMBTilesDefaultMinTileZoom];
-
- db = [[FMDatabase databaseWithPath:[tileSetURL relativePath]] retain];
-
- if ( ! [db open])
- return nil;
-
- return self;
- }
- - (void)dealloc
- {
- [tileProjection release];
-
- [db close];
- [db release];
-
- [super dealloc];
- }
- - (int)tileSideLength
- {
- return tileProjection.tileSideLength;
- }
- - (void)setTileSideLength:(NSUInteger)aTileSideLength
- {
- [tileProjection setTileSideLength:aTileSideLength];
- }
- - (RMTileImage *)tileImage:(RMTile)tile
- {
- NSAssert4(((tile.zoom >= self.minZoom) && (tile.zoom <= self.maxZoom)),
- @"%@ tried to retrieve tile with zoomLevel %d, outside source's defined range %f to %f",
- self, tile.zoom, self.minZoom, self.maxZoom);
- NSInteger zoom = tile.zoom;
- NSInteger x = tile.x;
- NSInteger y = pow(2, zoom) - tile.y - 1;
- FMResultSet *results = [db executeQuery:@"select tile_data from tiles where zoom_level = ? and tile_column = ? and tile_row = ?",
- [NSNumber numberWithFloat:zoom],
- [NSNumber numberWithFloat:x],
- [NSNumber numberWithFloat:y]];
-
- if ([db hadError])
- return [RMTileImage dummyTile:tile];
-
- [results next];
-
- NSData *data = [results dataForColumn:@"tile_data"];
- RMTileImage *image;
-
- if ( ! data)
- image = [RMTileImage dummyTile:tile];
-
- else
- image = [RMTileImage imageForTile:tile withData:data];
-
- [results close];
-
- return image;
- }
- - (NSString *)tileURL:(RMTile)tile
- {
- return nil;
- }
- - (NSString *)tileFile:(RMTile)tile
- {
- return nil;
- }
- - (NSString *)tilePath
- {
- return nil;
- }
- - (id <RMMercatorToTileProjection>)mercatorToTileProjection
- {
- return [[tileProjection retain] autorelease];
- }
- - (RMProjection *)projection
- {
- return [RMProjection googleProjection];
- }
- - (float)minZoom
- {
- FMResultSet *results = [db executeQuery:@"select min(zoom_level) from tiles"];
-
- if ([db hadError])
- return kMBTilesDefaultMinTileZoom;
-
- [results next];
-
- double minZoom = [results doubleForColumnIndex:0];
-
- [results close];
-
- return (float)minZoom;
- }
- - (float)maxZoom
- {
- FMResultSet *results = [db executeQuery:@"select max(zoom_level) from tiles"];
-
- if ([db hadError])
- return kMBTilesDefaultMaxTileZoom;
- [results next];
-
- double maxZoom = [results doubleForColumnIndex:0];
-
- [results close];
-
- return (float)maxZoom;
- }
- - (void)setMinZoom:(NSUInteger)aMinZoom
- {
- [tileProjection setMinZoom:aMinZoom];
- }
- - (void)setMaxZoom:(NSUInteger)aMaxZoom
- {
- [tileProjection setMaxZoom:aMaxZoom];
- }
- - (RMSphericalTrapezium)latitudeLongitudeBoundingBox
- {
- FMResultSet *results = [db executeQuery:@"select value from metadata where name = 'bounds'"];
-
- if ([db hadError])
- return kMBTilesDefaultLatLonBoundingBox;
-
- [results next];
-
- NSString *boundsString = [results stringForColumnIndex:0];
-
- [results close];
-
- if (boundsString)
- {
- NSArray *parts = [boundsString componentsSeparatedByString:@","];
-
- if ([parts count] == 4)
- {
- RMSphericalTrapezium bounds = {
- .southwest = {
- .longitude = [[parts objectAtIndex:0] doubleValue],
- .latitude = [[parts objectAtIndex:1] doubleValue],
- },
- .northeast = {
- .longitude = [[parts objectAtIndex:2] doubleValue],
- .latitude = [[parts objectAtIndex:3] doubleValue],
- },
- };
-
- return bounds;
- }
- }
-
- return kMBTilesDefaultLatLonBoundingBox;
- }
- - (BOOL)coversFullWorld
- {
- RMSphericalTrapezium ownBounds = [self latitudeLongitudeBoundingBox];
- RMSphericalTrapezium defaultBounds = kMBTilesDefaultLatLonBoundingBox;
-
- if (ownBounds.southwest.longitude <= defaultBounds.southwest.longitude + 10 &&
- ownBounds.northeast.longitude >= defaultBounds.northeast.longitude - 10)
- return YES;
-
- return NO;
- }
- - (RMMBTilesLayerType)layerType
- {
- FMResultSet *results = [db executeQuery:@"select value from metadata where name = 'type'"];
-
- if ([db hadError])
- return RMMBTilesLayerTypeBaselayer;
-
- [results next];
-
- NSString *type = nil;
-
- if ([results hasAnotherRow])
- type = [results stringForColumn:@"value"];
-
- [results close];
-
- return ([type isEqualToString:@"overlay"] ? RMMBTilesLayerTypeOverlay : RMMBTilesLayerTypeBaselayer);
- }
- - (NSString *)legend
- {
- FMResultSet *results = [db executeQuery:@"select value from metadata where name = 'legend'"];
-
- if ([db hadError])
- return nil;
-
- [results next];
-
- NSString *legend = nil;
-
- if ([results hasAnotherRow])
- legend = [results stringForColumn:@"value"];
-
- [results close];
-
- return legend;
- }
- - (void)didReceiveMemoryWarning
- {
- NSLog(@"*** didReceiveMemoryWarning in %@", [self class]);
- }
- - (NSString *)uniqueTilecacheKey
- {
- return [NSString stringWithFormat:@"MBTiles%@", [[db databasePath] lastPathComponent]];
- }
- - (NSString *)shortName
- {
- FMResultSet *results = [db executeQuery:@"select value from metadata where name = 'name'"];
-
- if ([db hadError])
- return @"Unknown MBTiles";
-
- [results next];
-
- NSString *shortName = [results stringForColumnIndex:0];
-
- [results close];
-
- return shortName;
- }
- - (NSString *)longDescription
- {
- FMResultSet *results = [db executeQuery:@"select value from metadata where name = 'description'"];
-
- if ([db hadError])
- return @"Unknown MBTiles description";
-
- [results next];
-
- NSString *description = [results stringForColumnIndex:0];
-
- [results close];
-
- return [NSString stringWithFormat:@"%@%@%@", [self shortName], ([[self shortName] length] && [description length] ? @" - " : @""), description];
- }
- - (NSString *)shortAttribution
- {
- FMResultSet *results = [db executeQuery:@"select value from metadata where name = 'attribution'"];
-
- if ([db hadError])
- return @"Unknown MBTiles attribution";
-
- [results next];
-
- NSString *attribution = [results stringForColumnIndex:0];
-
- [results close];
-
- return attribution;
- }
- - (NSString *)longAttribution
- {
- return [NSString stringWithFormat:@"%@%@%@", [self shortName], ([[self shortName] length] && [[self shortAttribution] length] ? @" - " : @""), [self shortAttribution]];
- }
- - (void)removeAllCachedImages
- {
- NSLog(@"*** removeAllCachedImages in %@", [self class]);
- }
- @end