WKImagePreviewViewController.mm   [plain text]

/*
* Copyright (C) 2015 Apple 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:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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 APPLE INC. AND ITS 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 APPLE INC. OR ITS 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 "config.h"
#import "WKImagePreviewViewController.h"

#if PLATFORM(IOS_FAMILY)

#import <UIKitSPI.h>
#import <WebCore/IntSize.h>
#import <_WKElementAction.h>

@implementation WKImagePreviewViewController {
RetainPtr<CGImageRef> _image;
RetainPtr<UIImageView> _imageView;
}

- (void)loadView
{
[super loadView];
self.view.backgroundColor = [UIColor whiteColor];
[self.view addSubview:_imageView.get()];
}

- (id)initWithCGImage:(RetainPtr<CGImageRef>)image defaultActions:(RetainPtr<NSArray>)actions elementInfo:(RetainPtr<_WKActivatedElementInfo>)elementInfo
{
self = [super initWithNibName:nil bundle:nil];
if (!self)
return nil;

_image = image;

_imageView = adoptNS([[UIImageView alloc] initWithFrame:CGRectZero]);
_imageView.get().contentMode = UIViewContentModeScaleAspectFill;
RetainPtr<UIImage> uiImage = adoptNS([[UIImage alloc] initWithCGImage:_image.get()]);
[_imageView setImage:uiImage.get()];

CGSize screenSize = [UIScreen mainScreen].bounds.size;
CGSize imageSize = _scaleSizeWithinSize(CGSizeMake(CGImageGetWidth(_image.get()), CGImageGetHeight(_image.get())), screenSize);
[_imageView setFrame:CGRectMake([_imageView frame].origin.x, [_imageView frame].origin.y, imageSize.width, imageSize.height)];
[self setPreferredContentSize:imageSize];

_imageActions = actions;
_activatedElementInfo = elementInfo;

return self;
}

- (void)viewDidLayoutSubviews
{
[super viewDidLayoutSubviews];

[_imageView setFrame:self.view.bounds];
}

static CGSize _scaleSizeWithinSize(CGSize source, CGSize destination)
{
CGSize size = destination;
CGFloat sourceAspectRatio = (source.width / source.height);
CGFloat destinationAspectRatio = (destination.width / destination.height);

if (sourceAspectRatio > destinationAspectRatio) {
size.width = destination.width;
size.height = (source.height * (destination.width / source.width));
} else if (sourceAspectRatio < destinationAspectRatio) {
size.width = (source.width * (destination.height / source.height));
size.height = destination.height;
}

return size;
}

#if HAVE(LINK_PREVIEW)
ALLOW_DEPRECATED_DECLARATIONS_BEGIN
ALLOW_DEPRECATED_IMPLEMENTATIONS_BEGIN
- (NSArray<UIPreviewAction *> *)previewActionItems
{
NSMutableArray<UIPreviewAction *> *previewActions = [NSMutableArray array];
for (_WKElementAction *imageAction in _imageActions.get()) {
UIPreviewAction *previewAction = [UIPreviewAction actionWithTitle:imageAction.title style:UIPreviewActionStyleDefault handler:^(UIPreviewAction *action, UIViewController *previewViewController) {
[imageAction runActionWithElementInfo:_activatedElementInfo.get()];
}];
previewAction.image = [_WKElementAction imageForElementActionType:imageAction.type];

[previewActions addObject:previewAction];
}

return previewActions;
}
ALLOW_DEPRECATED_IMPLEMENTATIONS_END
ALLOW_DEPRECATED_DECLARATIONS_END
#endif

@end

#endif