mirror of
https://github.com/Swiftgram/Telegram-iOS.git
synced 2025-06-16 05:55:20 +00:00
78 lines
3.2 KiB
Plaintext
78 lines
3.2 KiB
Plaintext
//
|
|
// ASCollectionViewLayoutInspector.mm
|
|
// Texture
|
|
//
|
|
// Copyright (c) Facebook, Inc. and its affiliates. All rights reserved.
|
|
// Changes after 4/13/2017 are: Copyright (c) Pinterest, Inc. All rights reserved.
|
|
// Licensed under Apache 2.0: http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
#ifndef MINIMAL_ASDK
|
|
#import <AsyncDisplayKit/ASCollectionViewLayoutInspector.h>
|
|
|
|
#import <AsyncDisplayKit/ASCollectionView.h>
|
|
#import <AsyncDisplayKit/ASCollectionView+Undeprecated.h>
|
|
#import <AsyncDisplayKit/ASCollectionNode.h>
|
|
|
|
#pragma mark - Helper Functions
|
|
|
|
// Returns a constrained size to let the cells layout itself as far as possible based on the scrollable direction
|
|
// of the collection view
|
|
ASSizeRange NodeConstrainedSizeForScrollDirection(ASCollectionView *collectionView) {
|
|
CGSize maxSize = collectionView.bounds.size;
|
|
UIEdgeInsets contentInset = collectionView.contentInset;
|
|
if (ASScrollDirectionContainsHorizontalDirection(collectionView.scrollableDirections)) {
|
|
maxSize.width = CGFLOAT_MAX;
|
|
maxSize.height -= (contentInset.top + contentInset.bottom);
|
|
} else {
|
|
maxSize.width -= (contentInset.left + contentInset.right);
|
|
maxSize.height = CGFLOAT_MAX;
|
|
}
|
|
return ASSizeRangeMake(CGSizeZero, maxSize);
|
|
}
|
|
|
|
#pragma mark - ASCollectionViewLayoutInspector
|
|
|
|
@implementation ASCollectionViewLayoutInspector {
|
|
struct {
|
|
unsigned int implementsConstrainedSizeForNodeAtIndexPathDeprecated:1;
|
|
unsigned int implementsConstrainedSizeForNodeAtIndexPath:1;
|
|
} _delegateFlags;
|
|
}
|
|
|
|
#pragma mark ASCollectionViewLayoutInspecting
|
|
|
|
- (void)didChangeCollectionViewDelegate:(id<ASCollectionDelegate>)delegate
|
|
{
|
|
if (delegate == nil) {
|
|
memset(&_delegateFlags, 0, sizeof(_delegateFlags));
|
|
} else {
|
|
_delegateFlags.implementsConstrainedSizeForNodeAtIndexPathDeprecated = [delegate respondsToSelector:@selector(collectionView:constrainedSizeForNodeAtIndexPath:)];
|
|
_delegateFlags.implementsConstrainedSizeForNodeAtIndexPath = [delegate respondsToSelector:@selector(collectionNode:constrainedSizeForItemAtIndexPath:)];
|
|
}
|
|
}
|
|
|
|
- (ASSizeRange)collectionView:(ASCollectionView *)collectionView constrainedSizeForNodeAtIndexPath:(NSIndexPath *)indexPath
|
|
{
|
|
if (_delegateFlags.implementsConstrainedSizeForNodeAtIndexPath) {
|
|
return [collectionView.asyncDelegate collectionNode:collectionView.collectionNode constrainedSizeForItemAtIndexPath:indexPath];
|
|
} else if (_delegateFlags.implementsConstrainedSizeForNodeAtIndexPathDeprecated) {
|
|
#pragma clang diagnostic push
|
|
#pragma clang diagnostic ignored "-Wdeprecated-declarations"
|
|
return [collectionView.asyncDelegate collectionView:collectionView constrainedSizeForNodeAtIndexPath:indexPath];
|
|
#pragma clang diagnostic pop
|
|
} else {
|
|
// With 2.0 `collectionView:constrainedSizeForNodeAtIndexPath:` was moved to the delegate. Assert if not implemented on the delegate but on the data source
|
|
ASDisplayNodeAssert([collectionView.asyncDataSource respondsToSelector:@selector(collectionView:constrainedSizeForNodeAtIndexPath:)] == NO, @"collectionView:constrainedSizeForNodeAtIndexPath: was moved from the ASCollectionDataSource to the ASCollectionDelegate.");
|
|
}
|
|
|
|
return NodeConstrainedSizeForScrollDirection(collectionView);
|
|
}
|
|
|
|
- (ASScrollDirection)scrollableDirections
|
|
{
|
|
return ASScrollDirectionNone;
|
|
}
|
|
|
|
@end
|
|
|
|
#endif |