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git-subtree-dir: submodules/AsyncDisplayKit git-subtree-mainline: d06f423e0ed3df1fed9bd10d79ee312a9179b632 git-subtree-split: 02bedc12816e251ad71777f9d2578329b6d2bef6
59 lines
1.9 KiB
Objective-C
59 lines
1.9 KiB
Objective-C
//
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// ASTextKitFontSizeAdjuster.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 <UIKit/UIKit.h>
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#import <AsyncDisplayKit/ASAvailability.h>
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#if AS_ENABLE_TEXTNODE
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#import <AsyncDisplayKit/ASTextKitAttributes.h>
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NS_ASSUME_NONNULL_BEGIN
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@class ASTextKitContext;
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AS_SUBCLASSING_RESTRICTED
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@interface ASTextKitFontSizeAdjuster : NSObject
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@property (nonatomic) CGSize constrainedSize;
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/**
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* Creates a class that will return a scale factor the will make a string fit inside the constrained size.
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*
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* "Fitting" means that both the longest word in the string will fit without breaking in the constrained
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* size's width AND that the entire string will try to fit within attribute's maximumLineCount. The amount
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* that the string will scale is based upon the attribute's pointSizeScaleFactors. If the string cannot fit
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* in the given width/number of lines, the smallest scale factor will be returned.
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*
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* @param context The text kit context
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* @param constrainedSize The constrained size to render into
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* @param textComponentAttributes The renderer's text attributes
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*/
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- (instancetype)initWithContext:(ASTextKitContext *)context
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constrainedSize:(CGSize)constrainedSize
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textKitAttributes:(const ASTextKitAttributes &)textComponentAttributes;
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/**
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* Returns the best fit scale factor for the text
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*/
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- (CGFloat)scaleFactor;
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/**
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* Takes all of the attributed string attributes dealing with size (font size, line spacing, kerning, etc) and
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* scales them by the scaleFactor. I wouldn't be surprised if I missed some in here.
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*/
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+ (void)adjustFontSizeForAttributeString:(NSMutableAttributedString *)attrString withScaleFactor:(CGFloat)scaleFactor;
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@end
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NS_ASSUME_NONNULL_END
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#endif
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