mirror of
https://github.com/zhigang1992/react-native.git
synced 2026-04-07 22:40:55 +08:00
e61a14e71d
Summary: Previously, we stored a pointer to ShadowNode inside NSAttributedString's attributes to make possible retrieving an EventEmitter associated with some text fragment. That worked fine besides only one caveat: the internal implementation of NSAttributedString is quite strange and that causes a memory leak. Because of some reason, NSAttributedString does not release stored attributes after own destruction (maybe OS uses some kind of caching). So, now, instead of storing a strong pointer to ShadowNode inside NSAttributedString, we store a weak pointer to EventEmitter. Storing a weak pointer is okay because a desired lifetime of EventEmitter is guaranteed by LocalData stored inside a View. Storing a weak EventEmitter instead of weak ShadowNode will also help us with migration to ShadowView (we cannot store ShadowView weakly because it's a stack allocated object). Reviewed By: sahrens Differential Revision: D13196886 fbshipit-source-id: f8714e4b3709765629d6456edf0c635bf5f7c53b
46 lines
1.4 KiB
Objective-C
46 lines
1.4 KiB
Objective-C
/**
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* Copyright (c) Facebook, Inc. and its affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*/
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#import <UIKit/UIKit.h>
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#import <react/attributedstring/AttributedString.h>
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#import <react/attributedstring/ParagraphAttributes.h>
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#import <react/core/LayoutConstraints.h>
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#import <react/graphics/Geometry.h>
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NS_ASSUME_NONNULL_BEGIN
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/**
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* iOS-specific TextLayoutManager
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*/
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@interface RCTTextLayoutManager : NSObject
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- (facebook::react::Size)
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measureWithAttributedString:
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(facebook::react::AttributedString)attributedString
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paragraphAttributes:
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(facebook::react::ParagraphAttributes)paragraphAttributes
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layoutConstraints:
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(facebook::react::LayoutConstraints)layoutConstraints;
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- (void)drawAttributedString:(facebook::react::AttributedString)attributedString
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paragraphAttributes:
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(facebook::react::ParagraphAttributes)paragraphAttributes
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frame:(CGRect)frame;
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- (facebook::react::SharedEventEmitter)
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getEventEmitterWithAttributeString:
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(facebook::react::AttributedString)attributedString
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paragraphAttributes:
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(facebook::react::ParagraphAttributes)paragraphAttributes
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frame:(CGRect)frame
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atPoint:(CGPoint)point;
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@end
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NS_ASSUME_NONNULL_END
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