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git-subtree-dir: submodules/AsyncDisplayKit git-subtree-mainline: d06f423e0ed3df1fed9bd10d79ee312a9179b632 git-subtree-split: 02bedc12816e251ad71777f9d2578329b6d2bef6
62 lines
1.8 KiB
Objective-C
62 lines
1.8 KiB
Objective-C
//
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// ASTextKitTruncating.h
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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 <Foundation/Foundation.h>
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#import <AsyncDisplayKit/ASAvailability.h>
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#if AS_ENABLE_TEXTNODE
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#import <AsyncDisplayKit/ASBaseDefines.h>
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#import <vector>
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NS_ASSUME_NONNULL_BEGIN
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@class ASTextKitContext;
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@protocol ASTextKitTruncating <NSObject>
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/**
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The character range from the original attributedString that is displayed by the renderer given the parameters in the
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initializer.
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*/
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@property (nonatomic, readonly) std::vector<NSRange> visibleRanges;
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/**
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Returns the first visible range or an NSRange with location of NSNotFound and size of 0 if no first visible
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range exists
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*/
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@property (nonatomic, readonly) NSRange firstVisibleRange;
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/**
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A truncater object is initialized with the full state of the text. It is a Single Responsibility Object that is
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mutative. It configures the state of the TextKit components (layout manager, text container, text storage) to achieve
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the intended truncation, then it stores the resulting state for later fetching.
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The truncater may mutate the state of the text storage such that only the drawn string is actually present in the
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text storage itself.
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The truncater should not store a strong reference to the context to prevent retain cycles.
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*/
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- (instancetype)initWithContext:(ASTextKitContext *)context
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truncationAttributedString:(NSAttributedString * _Nullable)truncationAttributedString
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avoidTailTruncationSet:(NSCharacterSet * _Nullable)avoidTailTruncationSet;
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/**
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Actually do the truncation.
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*/
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- (void)truncate;
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@end
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NS_ASSUME_NONNULL_END
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#endif
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