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61 lines
2.1 KiB
Objective-C
Executable File
61 lines
2.1 KiB
Objective-C
Executable File
//
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// ASTextKitTruncating.h
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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 <Foundation/Foundation.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, assign, 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, assign, 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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