//
//  RMMapScrollView.m
//  MapView
//
// Copyright (c) 2008-2013, 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 "RMMapScrollView.h"

@implementation RMMapScrollView

@synthesize mapScrollViewDelegate;

- (void)setContentOffset:(CGPoint)contentOffset
{
    if (self.mapScrollViewDelegate)
        [self.mapScrollViewDelegate scrollView:self correctedContentOffset:&contentOffset];

    if ( ! [[NSDecimalNumber notANumber] isEqualToNumber:@(contentOffset.x)] &&
         ! [[NSDecimalNumber notANumber] isEqualToNumber:@(contentOffset.y)])
    {
        [super setContentOffset:contentOffset];
    }
}

- (void)setContentOffset:(CGPoint)contentOffset animated:(BOOL)animated
{
    if (self.mapScrollViewDelegate)
        [self.mapScrollViewDelegate scrollView:self correctedContentOffset:&contentOffset];

    if ( ! [[NSDecimalNumber notANumber] isEqualToNumber:@(contentOffset.x)] &&
         ! [[NSDecimalNumber notANumber] isEqualToNumber:@(contentOffset.y)])
    {
        [super setContentOffset:contentOffset animated:animated];
    }
}

- (void)setContentSize:(CGSize)contentSize
{
    CGFloat factor = 1.0;

    if (self.mapScrollViewDelegate)
    {
        CGSize previousContentSize = contentSize;

        [self.mapScrollViewDelegate scrollView:self correctedContentSize:&contentSize];

        factor = contentSize.width / previousContentSize.width;
    }

    [super setContentSize:contentSize];

    if (factor != 1.0)
        self.zoomScale *= factor;
}

@end