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ASCollectionNode.m
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//
// ASCollectionNode.m
// AsyncDisplayKit
//
// Created by Scott Goodson on 9/5/15.
// Copyright (c) 2015 Facebook. All rights reserved.
//
#import "ASCollectionNode.h"
#import "ASDisplayNode+Subclasses.h"
@interface _ASCollectionPendingState : NSObject
@property (weak, nonatomic) id <ASCollectionDelegate> delegate;
@property (weak, nonatomic) id <ASCollectionDataSource> dataSource;
@end
@implementation _ASCollectionPendingState
@end
@interface ASCollectionNode ()
@property (nonatomic) _ASCollectionPendingState *pendingState;
@end
@interface ASCollectionView ()
- (instancetype)_initWithFrame:(CGRect)frame collectionViewLayout:(UICollectionViewLayout *)layout;
@end
@implementation ASCollectionNode
- (instancetype)init
{
ASDISPLAYNODE_NOT_DESIGNATED_INITIALIZER();
self = [self initWithCollectionViewLayout:nil]; // Will throw an exception for lacking a UICV Layout.
return nil;
}
- (instancetype)initWithCollectionViewLayout:(UICollectionViewLayout *)layout
{
return [self initWithFrame:CGRectZero collectionViewLayout:layout];
}
- (instancetype)initWithFrame:(CGRect)frame collectionViewLayout:(UICollectionViewLayout *)layout
{
ASDisplayNodeViewBlock collectionViewBlock = ^UIView *{
return [[ASCollectionView alloc] _initWithFrame:frame collectionViewLayout:layout];
};
if (self = [super initWithViewBlock:collectionViewBlock]) {
return self;
}
return nil;
}
- (void)didLoad
{
[super didLoad];
if (_pendingState) {
_ASCollectionPendingState *pendingState = _pendingState;
self.pendingState = nil;
ASCollectionView *view = self.view;
view.asyncDelegate = pendingState.delegate;
view.asyncDataSource = pendingState.dataSource;
}
}
- (_ASCollectionPendingState *)pendingState
{
if (!_pendingState && ![self isNodeLoaded]) {
self.pendingState = [[_ASCollectionPendingState alloc] init];
}
ASDisplayNodeAssert(![self isNodeLoaded] || !_pendingState, @"ASCollectionNode should not have a pendingState once it is loaded");
return _pendingState;
}
- (void)setDelegate:(id <ASCollectionDelegate>)delegate
{
if ([self pendingState]) {
_pendingState.delegate = delegate;
} else {
ASDisplayNodeAssert([self isNodeLoaded], @"ASCollectionNode should be loaded if pendingState doesn't exist");
self.view.asyncDelegate = delegate;
}
}
- (id <ASCollectionDelegate>)delegate
{
if ([self pendingState]) {
return _pendingState.delegate;
} else {
return self.view.asyncDelegate;
}
}
- (void)setDataSource:(id <ASCollectionDataSource>)dataSource
{
if ([self pendingState]) {
_pendingState.dataSource = dataSource;
} else {
ASDisplayNodeAssert([self isNodeLoaded], @"ASCollectionNode should be loaded if pendingState doesn't exist");
self.view.asyncDataSource = dataSource;
}
}
- (id <ASCollectionDataSource>)dataSource
{
if ([self pendingState]) {
return _pendingState.dataSource;
} else {
return self.view.asyncDataSource;
}
}
- (ASCollectionView *)view
{
return (ASCollectionView *)[super view];
}
- (void)visibilityDidChange:(BOOL)isVisible
{
}
- (void)clearContents
{
[super clearContents];
[self.view clearContents];
}
- (void)clearFetchedData
{
[super clearFetchedData];
[self.view clearFetchedData];
}
#pragma mark - ASCollectionView Forwards
- (ASRangeTuningParameters)tuningParametersForRangeType:(ASLayoutRangeType)rangeType
{
return [self.view tuningParametersForRangeType:rangeType];
}
- (void)setTuningParameters:(ASRangeTuningParameters)tuningParameters forRangeType:(ASLayoutRangeType)rangeType
{
return [self.view setTuningParameters:tuningParameters forRangeType:rangeType];
}
- (void)reloadDataWithCompletion:(void (^)())completion
{
[self.view reloadDataWithCompletion:completion];
}
- (void)reloadData
{
[self.view reloadData];
}
- (void)reloadDataImmediately
{
[self.view reloadDataImmediately];
}
@end