/MapView/Map/RMCachedTileSource.m
http://github.com/route-me/route-me · Objective C · 170 lines · 116 code · 25 blank · 29 comment · 4 complexity · 8d7be577edf18af579d31e4ee1154da6 MD5 · raw file
- //
- // RMCachedTileSource.m
- //
- // Copyright (c) 2008-2009, Route-Me Contributors
- // 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.
- //
- // 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 "RMCachedTileSource.h"
- #import "RMTileCache.h"
- @implementation RMCachedTileSource
- - (id) initWithSource: (id<RMTileSource>) _source
- {
- if ([_source isKindOfClass:[RMCachedTileSource class]])
- {
- [self release];
- return [_source retain];
- }
-
- if (![super init])
- return nil;
-
- tileSource = [_source retain];
-
- cache = [[RMTileCache alloc] initWithTileSource:tileSource];
-
- return self;
- }
- - (void) dealloc
- {
- [tileSource release];
- [cache release];
- [super dealloc];
- }
- + (RMCachedTileSource*) cachedTileSourceWithSource: (id<RMTileSource>) source
- {
- // Doing this fixes a strange build warning...
- id theSource = source;
- return [[[RMCachedTileSource alloc] initWithSource:theSource] autorelease];
- }
- -(RMTileImage *) tileImage: (RMTile) tile
- {
- RMTileImage *cachedImage = [cache cachedImage:tile];
- if (cachedImage != nil)
- {
- return cachedImage;
- }
- else
- {
- RMTileImage *image = [tileSource tileImage:tile];
- [cache addTile:tile WithImage:image];
- return image;
- }
- }
- -(id<RMMercatorToTileProjection>) mercatorToTileProjection
- {
- return [tileSource mercatorToTileProjection];
- }
- -(RMProjection*) projection
- {
- return [tileSource projection];
- }
- - (id<RMTileSource>) underlyingTileSource
- {
- // I'm assuming that our tilesource isn't itself a cachedtilesource.
- // This class's initialiser should make sure of that.
- return tileSource;
- }
- -(float) minZoom
- {
- return [tileSource minZoom];
- }
- -(float) maxZoom
- {
- return [tileSource maxZoom];
- }
- -(RMSphericalTrapezium) latitudeLongitudeBoundingBox
- {
- return [tileSource latitudeLongitudeBoundingBox];
- }
- - (void) didReceiveMemoryWarning
- {
- LogMethod();
- [cache didReceiveMemoryWarning];
- [tileSource didReceiveMemoryWarning];
- }
- -(NSString*) uniqueTilecacheKey
- {
- return [tileSource uniqueTilecacheKey];
- }
- -(NSString *)shortName
- {
- return [tileSource shortName];
- }
- -(NSString *)longDescription
- {
- return [tileSource longDescription];
- }
- -(NSString *)shortAttribution
- {
- return [tileSource shortAttribution];
- }
- -(NSString *)longAttribution
- {
- return [tileSource longAttribution];
- }
- -(NSString *) tileURL: (RMTile) tile
- {
- return [tileSource tileURL:tile];
- }
- -(NSString *) tileFile: (RMTile) tile
- {
- return [tileSource tileFile:tile];
- }
- -(NSString *) tilePath
- {
- return [tileSource tilePath];
- }
- -(void) setMinZoom:(NSUInteger)aMinZoom
- {
- [tileSource setMinZoom:aMinZoom];
- }
- -(void) setMaxZoom:(NSUInteger)aMaxZoom
- {
- [tileSource setMaxZoom:aMaxZoom];
- }
- -(void) removeAllCachedImages
- {
- [cache removeAllCachedImages];
- }
- @end