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109 lines
2.8 KiB
Plaintext
109 lines
2.8 KiB
Plaintext
/*
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* Copyright (c) 2014-present, Facebook, Inc.
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* All rights reserved.
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*
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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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*/
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#import "ASLayoutSpec.h"
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#import "ASAssert.h"
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#import "ASBaseDefines.h"
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#import "ASInternalHelpers.h"
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#import "ASLayout.h"
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#import "ASLayoutOptions.h"
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#import "ASLayoutOptionsPrivate.h"
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#import <objc/runtime.h>
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static NSString * const kDefaultChildKey = @"kDefaultChildKey";
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static NSString * const kDefaultChildrenKey = @"kDefaultChildrenKey";
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@interface ASLayoutSpec()
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@property (nonatomic, strong) NSMutableDictionary *layoutChildren;
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@end
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@implementation ASLayoutSpec
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@dynamic spacingAfter, spacingBefore, flexGrow, flexShrink, flexBasis, alignSelf, ascender, descender, sizeRange, layoutPosition, layoutOptions;
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@synthesize layoutChildren = _layoutChildren;
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- (instancetype)init
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{
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if (!(self = [super init])) {
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return nil;
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}
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_layoutChildren = [NSMutableDictionary dictionary];
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_isMutable = YES;
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return self;
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}
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#pragma mark - Layout
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- (ASLayout *)measureWithSizeRange:(ASSizeRange)constrainedSize
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{
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return [ASLayout layoutWithLayoutableObject:self size:constrainedSize.min];
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}
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- (ASLayoutSpec *)finalLayoutableWithParent:(ASLayoutSpec *)parentSpec;
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{
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return nil;
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}
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- (void)setChild:(id<ASLayoutable>)child;
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{
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[self setChild:child forIdentifier:kDefaultChildKey];
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}
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- (id<ASLayoutable>)layoutableToAddFromLayoutable:(id<ASLayoutable>)child
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{
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ASLayoutOptions *layoutOptions = [child layoutOptions];
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id<ASLayoutable> finalLayoutable = [child finalLayoutableWithParent:self];
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if (finalLayoutable) {
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[layoutOptions copyIntoOptions:finalLayoutable.layoutOptions];
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return finalLayoutable;
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}
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return child;
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}
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- (void)setChild:(id<ASLayoutable>)child forIdentifier:(NSString *)identifier
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{
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ASDisplayNodeAssert(self.isMutable, @"Cannot set properties when layout spec is not mutable");
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self.layoutChildren[identifier] = [self layoutableToAddFromLayoutable:child];;
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}
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- (void)setChildren:(NSArray *)children
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{
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ASDisplayNodeAssert(self.isMutable, @"Cannot set properties when layout spec is not mutable");
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NSMutableArray *finalChildren = [NSMutableArray arrayWithCapacity:children.count];
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for (id<ASLayoutable> child in children) {
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[finalChildren addObject:[self layoutableToAddFromLayoutable:child]];
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}
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self.layoutChildren[kDefaultChildrenKey] = [NSArray arrayWithArray:finalChildren];
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}
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- (id<ASLayoutable>)childForIdentifier:(NSString *)identifier
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{
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return self.layoutChildren[identifier];
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}
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- (id<ASLayoutable>)child
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{
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return self.layoutChildren[kDefaultChildKey];
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}
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- (NSArray *)children
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{
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return self.layoutChildren[kDefaultChildrenKey];
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}
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@end
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