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//
// RMAbstractMercatorTileSource.m
//
// Copyright (c) 2008-2012, 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 "RMAbstractMercatorTileSource.h"
#import "RMTileImage.h"
#import "RMFractalTileProjection.h"
#import "RMProjection.h"
@implementation RMAbstractMercatorTileSource
{
RMFractalTileProjection *_tileProjection;
}
@synthesize minZoom = _minZoom, maxZoom = _maxZoom;
- (id)init
{
if (!(self = [super init]))
return nil;
_tileProjection = nil;
// http://wiki.openstreetmap.org/index.php/FAQ#What_is_the_map_scale_for_a_particular_zoom_level_of_the_map.3F
self.minZoom = kDefaultMinTileZoom;
self.maxZoom = kDefaultMaxTileZoom;
return self;
}
- (void)dealloc
{
[_tileProjection release]; _tileProjection = nil;
[super dealloc];
}
- (RMSphericalTrapezium)latitudeLongitudeBoundingBox
{
return kDefaultLatLonBoundingBox;
}
- (UIImage *)imageForTile:(RMTile)tile inCache:(RMTileCache *)tileCache
{
@throw [NSException exceptionWithName:@"RMAbstractMethodInvocation"
reason:@"imageForTile:inCache: invoked on RMAbstractMercatorTileSource. Override this method when instantiating an abstract class."
userInfo:nil];
}
- (void)cancelAllDownloads
{
}
- (RMProjection *)projection
{
return [RMProjection googleProjection];
}
- (RMFractalTileProjection *)mercatorToTileProjection
{
if ( ! _tileProjection)
{
_tileProjection = [[RMFractalTileProjection alloc] initFromProjection:self.projection
tileSideLength:self.tileSideLength
maxZoom:self.maxZoom
minZoom:self.minZoom];
}
return [[_tileProjection retain] autorelease];
}
- (void)didReceiveMemoryWarning
{
LogMethod();
}
#pragma mark -
- (NSUInteger)tileSideLength
{
return kDefaultTileSize;
}
- (NSString *)uniqueTilecacheKey
{
@throw [NSException exceptionWithName:@"RMAbstractMethodInvocation"
reason:@"uniqueTilecacheKey invoked on RMAbstractMercatorTileSource. Override this method when instantiating an abstract class."
userInfo:nil];
}
- (NSString *)shortName
{
@throw [NSException exceptionWithName:@"RMAbstractMethodInvocation"
reason:@"shortName invoked on RMAbstractMercatorTileSource. Override this method when instantiating an abstract class."
userInfo:nil];
}
- (NSString *)longDescription
{
return [self shortName];
}
- (NSString *)shortAttribution
{
@throw [NSException exceptionWithName:@"RMAbstractMethodInvocation"
reason:@"shortAttribution invoked on RMAbstractMercatorTileSource. Override this method when instantiating an abstract class."
userInfo:nil];
}
- (NSString *)longAttribution
{
return [self shortAttribution];
}
@end
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