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100 lines
2.8 KiB
Objective-C
100 lines
2.8 KiB
Objective-C
//
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// _ASTransitionContext.m
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// AsyncDisplayKit
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//
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// Created by Levi McCallum on 2/4/16.
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//
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// Copyright (c) 2014-present, Facebook, Inc. All rights reserved.
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// This source code is licensed under the BSD-style license found in the
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// LICENSE file in the root directory of this source tree. An additional grant
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// of patent rights can be found in the PATENTS file in the same directory.
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//
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#import "_ASTransitionContext.h"
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#import "ASDisplayNode.h"
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#import "ASLayout.h"
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NSString * const ASTransitionContextFromLayoutKey = @"org.asyncdisplaykit.ASTransitionContextFromLayoutKey";
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NSString * const ASTransitionContextToLayoutKey = @"org.asyncdisplaykit.ASTransitionContextToLayoutKey";
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@interface _ASTransitionContext ()
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@property (weak, nonatomic) id<_ASTransitionContextLayoutDelegate> layoutDelegate;
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@property (weak, nonatomic) id<_ASTransitionContextCompletionDelegate> completionDelegate;
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@end
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@implementation _ASTransitionContext
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- (instancetype)initWithAnimation:(BOOL)animated
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layoutDelegate:(id<_ASTransitionContextLayoutDelegate>)layoutDelegate
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completionDelegate:(id<_ASTransitionContextCompletionDelegate>)completionDelegate
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{
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self = [super init];
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if (self) {
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_animated = animated;
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_layoutDelegate = layoutDelegate;
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_completionDelegate = completionDelegate;
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}
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return self;
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}
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#pragma mark - ASContextTransitioning Protocol Implementation
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- (ASLayout *)layoutForKey:(NSString *)key
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{
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return [_layoutDelegate transitionContext:self layoutForKey:key];
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}
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- (ASSizeRange)constrainedSizeForKey:(NSString *)key
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{
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return [_layoutDelegate transitionContext:self constrainedSizeForKey:key];
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}
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- (CGRect)initialFrameForNode:(ASDisplayNode *)node
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{
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for (ASDisplayNode *subnode in [_layoutDelegate currentSubnodesWithTransitionContext:self]) {
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if (node == subnode) {
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return node.frame;
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}
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}
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return CGRectZero;
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}
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- (CGRect)finalFrameForNode:(ASDisplayNode *)node
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{
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for (ASLayout *layout in [self layoutForKey:ASTransitionContextToLayoutKey].sublayouts) {
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if (layout.layoutableObject == node) {
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return [layout frame];
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}
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}
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return CGRectZero;
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}
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- (NSArray<ASDisplayNode *> *)subnodesForKey:(NSString *)key
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{
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NSMutableArray<ASDisplayNode *> *subnodes = [NSMutableArray array];
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for (ASLayout *sublayout in [self layoutForKey:key].sublayouts) {
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[subnodes addObject:(ASDisplayNode *)sublayout.layoutableObject];
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}
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return subnodes;
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}
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- (NSArray<ASDisplayNode *> *)insertedSubnodes
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{
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return [_layoutDelegate insertedSubnodesWithTransitionContext:self];
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}
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- (NSArray<ASDisplayNode *> *)removedSubnodes
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{
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return [_layoutDelegate removedSubnodesWithTransitionContext:self];
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}
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- (void)completeTransition:(BOOL)didComplete
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{
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[_completionDelegate transitionContext:self didComplete:didComplete];
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}
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@end
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