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79 lines
2.7 KiB
Objective-C
79 lines
2.7 KiB
Objective-C
//
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// ASDimension.h
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// AsyncDisplayKit
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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 root directory of this source tree. An additional grant
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// of patent rights can be found in the PATENTS file in the same directory.
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//
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#pragma once
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#import <UIKit/UIKit.h>
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#import <AsyncDisplayKit/ASBaseDefines.h>
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/** A dimension relative to constraints to be provided in the future. */
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typedef NS_ENUM(NSInteger, ASRelativeDimensionType) {
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/** Just a number. It will always resolve to exactly this amount. This is the default type. */
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ASRelativeDimensionTypePoints,
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/** Multiplied to a provided parent amount to resolve a final amount. */
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ASRelativeDimensionTypeFraction,
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};
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typedef struct {
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ASRelativeDimensionType type;
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CGFloat value;
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} ASRelativeDimension;
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/** Expresses an inclusive range of sizes. Used to provide a simple constraint to layout. */
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typedef struct {
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CGSize min;
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CGSize max;
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} ASSizeRange;
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extern ASRelativeDimension const ASRelativeDimensionUnconstrained;
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#define isValidForLayout(x) ((isnormal(x) || x == 0.0) && x >= 0.0 && x < (CGFLOAT_MAX / 2.0))
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ASDISPLAYNODE_EXTERN_C_BEGIN
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NS_ASSUME_NONNULL_BEGIN
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#pragma mark - ASRelativeDimension
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extern ASRelativeDimension ASRelativeDimensionMake(ASRelativeDimensionType type, CGFloat value);
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extern ASRelativeDimension ASRelativeDimensionMakeWithPoints(CGFloat points);
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extern ASRelativeDimension ASRelativeDimensionMakeWithFraction(CGFloat fraction);
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extern ASRelativeDimension ASRelativeDimensionCopy(ASRelativeDimension aDimension);
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extern BOOL ASRelativeDimensionEqualToRelativeDimension(ASRelativeDimension lhs, ASRelativeDimension rhs);
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extern NSString *NSStringFromASRelativeDimension(ASRelativeDimension dimension);
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extern CGFloat ASRelativeDimensionResolve(ASRelativeDimension dimension, CGFloat parent);
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#pragma mark - ASSizeRange
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extern ASSizeRange ASSizeRangeMake(CGSize min, CGSize max);
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/** Creates an ASSizeRange with the provided size as both min and max */
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extern ASSizeRange ASSizeRangeMakeExactSize(CGSize size);
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/** Clamps the provided CGSize between the [min, max] bounds of this ASSizeRange. */
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extern CGSize ASSizeRangeClamp(ASSizeRange sizeRange, CGSize size);
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/**
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* Intersects another size range. If the other size range does not overlap in either dimension, this size range
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* "wins" by returning a single point within its own range that is closest to the non-overlapping range.
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*/
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extern ASSizeRange ASSizeRangeIntersect(ASSizeRange sizeRange, ASSizeRange otherSizeRange);
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extern BOOL ASSizeRangeEqualToSizeRange(ASSizeRange lhs, ASSizeRange rhs);
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extern NSString *NSStringFromASSizeRange(ASSizeRange sizeRange);
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NS_ASSUME_NONNULL_END
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ASDISPLAYNODE_EXTERN_C_END
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