mirror of
https://github.com/kucherenko/jscpd.git
synced 2026-09-19 08:11:03 +08:00
Andrey Kucherenko
89 lines
3.5 KiB
Objective-C
89 lines
3.5 KiB
Objective-C
/**
|
|
* Copyright (c) 2016-present, Facebook, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* This source code is licensed under the BSD-style license found in the
|
|
* LICENSE file in the root directory of this source tree. An additional grant
|
|
* of patent rights can be found in the PATENTS file in the same directory.
|
|
*/
|
|
|
|
#import "IGListAdapterProxy.h"
|
|
|
|
#import <IGListKit/IGListAssert.h>
|
|
|
|
/**
|
|
Define messages that you want the IGListAdapter object to intercept. Pattern copied from
|
|
https://github.com/facebook/AsyncDisplayKit/blob/7b112a2dcd0391ddf3671f9dcb63521f554b78bd/AsyncDisplayKit/ASCollectionView.mm#L34-L53
|
|
*/
|
|
static BOOL isInterceptedSelector(SEL sel) {
|
|
return (
|
|
// UICollectionViewDelegate
|
|
sel == @selector(collectionView:didSelectItemAtIndexPath:) ||
|
|
sel == @selector(collectionView:willDisplayCell:forItemAtIndexPath:) ||
|
|
sel == @selector(collectionView:didEndDisplayingCell:forItemAtIndexPath:) ||
|
|
// UICollectionViewDelegateFlowLayout
|
|
sel == @selector(collectionView:layout:sizeForItemAtIndexPath:) ||
|
|
sel == @selector(collectionView:layout:insetForSectionAtIndex:) ||
|
|
sel == @selector(collectionView:layout:minimumInteritemSpacingForSectionAtIndex:) ||
|
|
sel == @selector(collectionView:layout:minimumLineSpacingForSectionAtIndex:) ||
|
|
sel == @selector(collectionView:layout:referenceSizeForFooterInSection:) ||
|
|
sel == @selector(collectionView:layout:referenceSizeForHeaderInSection:) ||
|
|
// UIScrollViewDelegate
|
|
sel == @selector(scrollViewDidScroll:) ||
|
|
sel == @selector(scrollViewWillBeginDragging:) ||
|
|
sel == @selector(scrollViewDidEndDragging:willDecelerate:)
|
|
);
|
|
}
|
|
|
|
@interface IGListAdapterProxy () {
|
|
__weak id _collectionViewTarget;
|
|
__weak id _scrollViewTarget;
|
|
__weak IGListAdapter *_interceptor;
|
|
}
|
|
|
|
@end
|
|
|
|
@implementation IGListAdapterProxy
|
|
|
|
- (instancetype)initWithCollectionViewTarget:(nullable id<UICollectionViewDelegate>)collectionViewTarget
|
|
scrollViewTarget:(nullable id<UIScrollViewDelegate>)scrollViewTarget
|
|
interceptor:(IGListAdapter *)interceptor {
|
|
IGParameterAssert(interceptor != nil);
|
|
// -[NSProxy init] is undefined
|
|
if (self) {
|
|
_collectionViewTarget = collectionViewTarget;
|
|
_scrollViewTarget = scrollViewTarget;
|
|
_interceptor = interceptor;
|
|
}
|
|
return self;
|
|
}
|
|
|
|
- (BOOL)respondsToSelector:(SEL)aSelector {
|
|
return isInterceptedSelector(aSelector)
|
|
|| [_collectionViewTarget respondsToSelector:aSelector]
|
|
|| [_scrollViewTarget respondsToSelector:aSelector];
|
|
}
|
|
|
|
- (id)forwardingTargetForSelector:(SEL)aSelector {
|
|
if (isInterceptedSelector(aSelector)) {
|
|
return _interceptor;
|
|
}
|
|
|
|
// since UICollectionViewDelegate is a superset of UIScrollViewDelegate, first check if the method exists in
|
|
// _scrollViewTarget, otherwise use the _collectionViewTarget
|
|
return [_scrollViewTarget respondsToSelector:aSelector] ? _scrollViewTarget : _collectionViewTarget;
|
|
}
|
|
|
|
// handling unimplemented methods and nil target/interceptor
|
|
// https://github.com/Flipboard/FLAnimatedImage/blob/76a31aefc645cc09463a62d42c02954a30434d7d/FLAnimatedImage/FLAnimatedImage.m#L786-L807
|
|
- (void)forwardInvocation:(NSInvocation *)invocation {
|
|
void *nullPointer = NULL;
|
|
[invocation setReturnValue:&nullPointer];
|
|
}
|
|
|
|
- (NSMethodSignature *)methodSignatureForSelector:(SEL)selector {
|
|
return [NSObject instanceMethodSignatureForSelector:@selector(init)];
|
|
}
|
|
|
|
@end
|