RMAbstractMercatorWebSource.m
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//
// RMMercatorWebSource.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 "RMAbstractMercatorWebSource.h"
#import "RMTransform.h"
#import "RMTileImage.h"
#import "RMTileLoader.h"
#import "RMFractalTileProjection.h"
#import "RMTiledLayerController.h"
#import "RMProjection.h"
@implementation RMAbstractMercatorWebSource
-(id) init
{
if (![super init])
return nil;
NSUInteger sideLength = [[self class] tileSideLength];
tileProjection = [[RMFractalTileProjection alloc] initFromProjection:[self projection] tileSideLength:sideLength maxZoom:18];
return self;
}
-(void) dealloc
{
[tileProjection release];
[super dealloc];
}
+(int)tileSideLength
{
return kDefaultTileSize;
}
-(float) minZoom
{
return kDefaultMinTileZoom;
}
-(float) maxZoom
{
return kDefaultMaxTileZoom;
}
/// \bug magic string literals
-(NSString*) tileURL: (RMTile) tile
{
@throw [NSException exceptionWithName:@"RMAbstractMethodInvocation" reason:@"tileURL invoked on AbstractMercatorWebSource. Override this method when instantiating abstract class." userInfo:nil];
}
-(NSString*) tileFile: (RMTile) tile
{
return nil;
}
-(NSString*) tilePath
{
return nil;
}
-(RMTileImage *) tileImage: (RMTile)tile
{
RMTileImage *image;
tile = [tileProjection normaliseTile:tile];
NSString *file = [self tileFile:tile];
if(file && [[NSFileManager defaultManager] fileExistsAtPath:file])
{
image = [RMTileImage imageWithTile:tile FromFile:file];
} else {
image = [RMTileImage imageWithTile:tile FromURL:[self tileURL:tile]];
}
return image;
}
-(id<RMMercatorToTileProjection>) mercatorToTileProjection
{
return [[tileProjection retain] autorelease];
}
-(RMProjection*) projection
{
return [RMProjection googleProjection];
}
-(void) didReceiveMemoryWarning
{
LogMethod();
}
-(NSString *)uniqueTilecacheKey
{
@throw [NSException exceptionWithName:@"RMAbstractMethodInvocation" reason:@"uniqueTilecacheKey invoked on AbstractMercatorWebSource. Override this method when instantiating abstract class." userInfo:nil];
}
-(NSString *)shortName
{
@throw [NSException exceptionWithName:@"RMAbstractMethodInvocation" reason:@"shortName invoked on AbstractMercatorWebSource. Override this method when instantiating abstract class." userInfo:nil];
}
-(NSString *)longDescription
{
return [self shortName];
}
-(NSString *)shortAttribution
{
@throw [NSException exceptionWithName:@"RMAbstractMethodInvocation" reason:@"shortAttribution invoked on AbstractMercatorWebSource. Override this method when instantiating abstract class." userInfo:nil];
}
-(NSString *)longAttribution
{
return [self shortAttribution];
}
-(void) removeAllCachedImages
{
}
@end