Swiftgram/Source/Details/_ASCollectionViewCell.m
appleguy 465abb1ded [License] Simplify the Texture license to be pure Apache 2 (removing ASDK-Licenses). (#1077)
* [License] Simplify the Texture license to be pure Apache 2 (removing ASDK-Licenses)

With permission of the Facebook Open Source team, we are simplifying the Texture
license so that clients can rely on the Apache 2 terms that most of Texture is
already covered by. This means that code originally forked from AsyncDisplayKit
will be re-licensed from "BSD 3-clause + PATENTS v2" to Apache 2 without a
PATENTS file.

After getting confirmation that the updates to these core files look good, we'll
propagate this new license header to all files (in this same PR) and get sign-off
from all parties before landing.

* [License] Update all Texture source files to be pure Apache 2.

* Changelog entry for Apache 2 license update.

* Revert "[License] Update all Texture source files to be pure Apache 2."

This reverts commit ffa0fbbba9717d871dd16c4b07539f2f8208fc2b.

* [License] Update all Texture source files to be pure Apache 2, maintaining copyrights.

* [License] Update CONTRIBUTING, README, Podspec & Dangerfile.
2018-08-28 07:39:18 -07:00

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//
// _ASCollectionViewCell.m
// Texture
//
// Copyright (c) Facebook, Inc. and its affiliates. All rights reserved.
// Changes after 4/13/2017 are: Copyright (c) Pinterest, Inc. All rights reserved.
// Licensed under Apache 2.0: http://www.apache.org/licenses/LICENSE-2.0
//
#import "_ASCollectionViewCell.h"
#import <AsyncDisplayKit/ASCellNode+Internal.h>
#import <AsyncDisplayKit/ASCollectionElement.h>
#import <AsyncDisplayKit/ASInternalHelpers.h>
@implementation _ASCollectionViewCell
- (ASCellNode *)node
{
return self.element.node;
}
- (void)setElement:(ASCollectionElement *)element
{
ASDisplayNodeAssertMainThread();
ASCellNode *node = element.node;
node.layoutAttributes = _layoutAttributes;
_element = element;
[node __setSelectedFromUIKit:self.selected];
[node __setHighlightedFromUIKit:self.highlighted];
}
- (BOOL)consumesCellNodeVisibilityEvents
{
ASCellNode *node = self.node;
if (node == nil) {
return NO;
}
return ASSubclassOverridesSelector([ASCellNode class], [node class], @selector(cellNodeVisibilityEvent:inScrollView:withCellFrame:));
}
- (void)cellNodeVisibilityEvent:(ASCellNodeVisibilityEvent)event inScrollView:(UIScrollView *)scrollView
{
[self.node cellNodeVisibilityEvent:event inScrollView:scrollView withCellFrame:self.frame];
}
- (void)setSelected:(BOOL)selected
{
[super setSelected:selected];
[self.node __setSelectedFromUIKit:selected];
}
- (void)setHighlighted:(BOOL)highlighted
{
[super setHighlighted:highlighted];
[self.node __setHighlightedFromUIKit:highlighted];
}
- (void)setLayoutAttributes:(UICollectionViewLayoutAttributes *)layoutAttributes
{
_layoutAttributes = layoutAttributes;
self.node.layoutAttributes = layoutAttributes;
}
- (void)prepareForReuse
{
self.layoutAttributes = nil;
// Need to clear element before UIKit calls setSelected:NO / setHighlighted:NO on its cells
self.element = nil;
[super prepareForReuse];
}
/**
* In the initial case, this is called by UICollectionView during cell dequeueing, before
* we get a chance to assign a node to it, so we must be sure to set these layout attributes
* on our node when one is next assigned to us in @c setNode: . Since there may be cases when we _do_ already
* have our node assigned e.g. during a layout update for existing cells, we also attempt
* to update it now.
*/
- (void)applyLayoutAttributes:(UICollectionViewLayoutAttributes *)layoutAttributes
{
[super applyLayoutAttributes:layoutAttributes];
self.layoutAttributes = layoutAttributes;
}
/**
* Keep our node filling our content view.
*/
- (void)layoutSubviews
{
[super layoutSubviews];
self.node.frame = self.contentView.bounds;
}
@end
/**
* A category that makes _ASCollectionViewCell conform to IGListBindable.
*
* We don't need to do anything to bind the view model the cell node
* serves the same purpose.
*/
#if __has_include(<IGListKit/IGListBindable.h>)
#import <IGListKit/IGListBindable.h>
@interface _ASCollectionViewCell (IGListBindable) <IGListBindable>
@end
@implementation _ASCollectionViewCell (IGListBindable)
- (void)bindViewModel:(id)viewModel
{
// nop
}
@end
#endif