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54 lines
1.6 KiB
Objective-C
54 lines
1.6 KiB
Objective-C
//
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// ASLayerBackingTipProvider.m
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// Texture
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//
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// Copyright (c) 2014-present, Facebook, Inc. All rights reserved.
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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 /ASDK-Licenses directory of this source tree. An additional
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// grant of patent rights can be found in the PATENTS file in the same directory.
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//
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// Modifications to this file made after 4/13/2017 are: Copyright (c) 2017-present,
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// Pinterest, Inc. Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// 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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