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git-subtree-dir: submodules/AsyncDisplayKit git-subtree-mainline: d06f423e0ed3df1fed9bd10d79ee312a9179b632 git-subtree-split: 02bedc12816e251ad71777f9d2578329b6d2bef6
46 lines
1.2 KiB
Plaintext
46 lines
1.2 KiB
Plaintext
//
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// ASLayerBackingTipProvider.mm
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// Texture
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//
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// Copyright (c) Facebook, Inc. and its affiliates. All rights reserved.
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// Changes after 4/13/2017 are: Copyright (c) Pinterest, Inc. All rights reserved.
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// Licensed under Apache 2.0: http://www.apache.org/licenses/LICENSE-2.0
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//
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#import "ASLayerBackingTipProvider.h"
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#if AS_ENABLE_TIPS
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#import <AsyncDisplayKit/ASCellNode.h>
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#import <AsyncDisplayKit/ASControlNode.h>
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#import <AsyncDisplayKit/ASDisplayNode.h>
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#import <AsyncDisplayKit/ASDisplayNodeExtras.h>
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#import <AsyncDisplayKit/ASTip.h>
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@implementation ASLayerBackingTipProvider
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- (ASTip *)tipForNode:(ASDisplayNode *)node
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{
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// Already layer-backed.
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if (node.layerBacked) {
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return nil;
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}
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// TODO: Avoid revisiting nodes we already visited
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ASDisplayNode *failNode = ASDisplayNodeFindFirstNode(node, ^BOOL(ASDisplayNode * _Nonnull node) {
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return !node.supportsLayerBacking;
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});
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if (failNode != nil) {
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return nil;
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}
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ASTip *result = [[ASTip alloc] initWithNode:node
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kind:ASTipKindEnableLayerBacking
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format:@"Enable layer backing to improve performance"];
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return result;
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}
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@end
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#endif // AS_ENABLE_TIPS
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