AsyncDisplayKit/AsyncDisplayKit/ASCellNode.m at master · willardLin/AsyncDisplayKit · GitHub

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* 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 "ASDisplayNode+Subclasses.h"

#import "ASRangeControllerInternal.h"

#import "ASTextNode.h"

#pragma mark -

#pragma mark ASCellNode

@interface ASCellNode () {

// used by ASRangeController machinery

NSIndexPath *_asyncdisplaykit_indexPath;

}

@end

@implementation ASCellNode

- (instancetype)init

{

if (!(self = [super init]))

return nil;

// use UITableViewCell defaults

_selectionStyle = UITableViewCellSelectionStyleDefault;

return self;

}

- (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.");

}

// TODO consider making this property an associated object in ASRangeController.mm

- (NSIndexPath *)asyncdisplaykit_indexPath

{

return _asyncdisplaykit_indexPath;

}

- (void)setAsyncdisplaykit_indexPath:(NSIndexPath *)asyncdisplaykit_indexPath

{

if (_asyncdisplaykit_indexPath == asyncdisplaykit_indexPath)

return;

_asyncdisplaykit_indexPath = [asyncdisplaykit_indexPath copy];

}

@end

#pragma mark -

#pragma mark ASTextCellNode

@interface ASTextCellNode () {

NSString *_text;

ASTextNode *_textNode;

}

@end

@implementation ASTextCellNode

static const CGFloat kHorizontalPadding = 15.0f;

static const CGFloat kVerticalPadding = 11.0f;

static const CGFloat kFontSize = 18.0f;

- (instancetype)init

{

if (!(self = [super init]))

return nil;

_textNode = [[ASTextNode alloc] init];

[self addSubnode:_textNode];

return self;

}

- (CGSize)calculateSizeThatFits:(CGSize)constrainedSize

{

CGSize availableSize = CGSizeMake(constrainedSize.width - 2 * kHorizontalPadding,

constrainedSize.height - 2 * kVerticalPadding);

CGSize textNodeSize = [_textNode measure:availableSize];

return CGSizeMake(ceilf(2 * kHorizontalPadding + textNodeSize.width),

ceilf(2 * kVerticalPadding + textNodeSize.height));

}

- (void)layout

{

_textNode.frame = CGRectInset(self.bounds, kHorizontalPadding, kVerticalPadding);

}

- (void)setText:(NSString *)text

{

if (_text == text)

return;

_text = [text copy];

_textNode.attributedString = [[NSAttributedString alloc] initWithString:_text

attributes:@{NSFontAttributeName: [UIFont systemFontOfSize:kFontSize]}];

[self invalidateCalculatedSize];

}

@end

AsyncDisplayKit/AsyncDisplayKit/ASCellNode.m at master · willardLin/AsyncDisplayKit · GitHub

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