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ASCellNode.m
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/* Copyright (c) 2014-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 "ASCellNode.h"
#import "ASInternalHelpers.h"
#import <AsyncDisplayKit/_ASDisplayView.h>
#import <AsyncDisplayKit/ASDisplayNode+Subclasses.h>
#import <AsyncDisplayKit/ASTextNode.h>
#import <AsyncDisplayKit/ASInsetLayoutSpec.h>
#pragma mark -
#pragma mark ASCellNode
@interface ASCellNode ()
{
UIViewController *_viewController;
ASDisplayNode *_viewControllerNode;
}
@end
@implementation ASCellNode
- (instancetype)init
{
if (!(self = [super init]))
return nil;
// Use UITableViewCell defaults
_selectionStyle = UITableViewCellSelectionStyleDefault;
self.clipsToBounds = YES;
return self;
}
- (instancetype)initWithViewControllerBlock:(ASDisplayNodeViewControllerBlock)viewControllerBlock didLoadBlock:(ASDisplayNodeDidLoadBlock)didLoadBlock
{
if (!(self = [super init]))
return nil;
ASDisplayNodeAssertNotNil(viewControllerBlock, @"should initialize with a valid block that returns a UIViewController");
if (viewControllerBlock) {
_viewControllerNode = [[ASDisplayNode alloc] initWithViewBlock:^UIView *{
_viewController = viewControllerBlock();
return _viewController.view;
} didLoadBlock:didLoadBlock];
[self addSubnode:_viewControllerNode];
}
return self;
}
- (void)layout
{
[super layout];
_viewControllerNode.frame = self.bounds;
}
- (void)layoutDidFinish
{
[super layoutDidFinish];
_viewControllerNode.frame = self.bounds;
}
- (instancetype)initWithLayerBlock:(ASDisplayNodeLayerBlock)viewBlock didLoadBlock:(ASDisplayNodeDidLoadBlock)didLoadBlock
{
ASDisplayNodeAssertNotSupported();
return nil;
}
- (instancetype)initWithViewBlock:(ASDisplayNodeViewBlock)viewBlock didLoadBlock:(ASDisplayNodeDidLoadBlock)didLoadBlock
{
ASDisplayNodeAssertNotSupported();
return nil;
}
- (void)setLayerBacked:(BOOL)layerBacked
{
// ASRangeController expects ASCellNodes to be view-backed. (Layer-backing is supported on ASCellNode subnodes.)
ASDisplayNodeAssert(!layerBacked, @"ASCellNode does not support layer-backing.");
}
- (void)setNeedsLayout
{
ASDisplayNodeAssertThreadAffinity(self);
CGSize oldSize = self.calculatedSize;
[super setNeedsLayout];
if (_layoutDelegate != nil) {
BOOL sizeChanged = !CGSizeEqualToSize(oldSize, self.calculatedSize);
ASPerformBlockOnMainThread(^{
[_layoutDelegate nodeDidRelayout:self sizeChanged:sizeChanged];
});
}
}
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
ASDisplayNodeAssertMainThread();
ASDisplayNodeAssert([self.view isKindOfClass:_ASDisplayView.class], @"ASCellNode views must be of type _ASDisplayView");
[(_ASDisplayView *)self.view __forwardTouchesBegan:touches withEvent:event];
}
- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
{
ASDisplayNodeAssertMainThread();
ASDisplayNodeAssert([self.view isKindOfClass:_ASDisplayView.class], @"ASCellNode views must be of type _ASDisplayView");
[(_ASDisplayView *)self.view __forwardTouchesMoved:touches withEvent:event];
}
- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
{
ASDisplayNodeAssertMainThread();
ASDisplayNodeAssert([self.view isKindOfClass:_ASDisplayView.class], @"ASCellNode views must be of type _ASDisplayView");
[(_ASDisplayView *)self.view __forwardTouchesEnded:touches withEvent:event];
}
- (void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event
{
ASDisplayNodeAssertMainThread();
ASDisplayNodeAssert([self.view isKindOfClass:_ASDisplayView.class], @"ASCellNode views must be of type _ASDisplayView");
[(_ASDisplayView *)self.view __forwardTouchesCancelled:touches withEvent:event];
}
@end
#pragma mark -
#pragma mark ASTextCellNode
@interface ASTextCellNode ()
{
NSString *_text;
ASTextNode *_textNode;
}
@end
@implementation ASTextCellNode
static const CGFloat kFontSize = 18.0f;
- (instancetype)init
{
if (!(self = [super init]))
return nil;
_text = @"";
_textNode = [[ASTextNode alloc] init];
[self addSubnode:_textNode];
return self;
}
- (ASLayoutSpec *)layoutSpecThatFits:(ASSizeRange)constrainedSize
{
static const CGFloat kHorizontalPadding = 15.0f;
static const CGFloat kVerticalPadding = 11.0f;
UIEdgeInsets insets = UIEdgeInsetsMake(kVerticalPadding, kHorizontalPadding, kVerticalPadding, kHorizontalPadding);
return [ASInsetLayoutSpec insetLayoutSpecWithInsets:insets child:_textNode];
}
- (void)setText:(NSString *)text
{
if (_text == text)
return;
_text = [text copy];
_textNode.attributedString = [[NSAttributedString alloc] initWithString:_text
attributes:@{NSFontAttributeName: [UIFont systemFontOfSize:kFontSize]}];
[self setNeedsLayout];
}
@end