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e4b2c05c21
* Add new layout spec class with snapshot testing. Update examples and CHANGELOG.md * Code review updates. * Open curly bracket in a new line.
80 lines
2.7 KiB
Objective-C
80 lines
2.7 KiB
Objective-C
//
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// ASCornerLayoutSpec.h
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// Texture
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//
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// Copyright (c) 2017-present, Pinterest, Inc. All rights reserved.
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// 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 <AsyncDisplayKit/ASLayoutSpec.h>
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/**
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The corner location for positioning corner element.
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*/
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typedef NS_ENUM(NSInteger, ASCornerLayoutLocation) {
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ASCornerLayoutLocationTopLeft,
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ASCornerLayoutLocationTopRight,
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ASCornerLayoutLocationBottomLeft,
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ASCornerLayoutLocationBottomRight,
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};
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NS_ASSUME_NONNULL_BEGIN
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/**
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A layout spec that positions a corner element which relatives to the child element.
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@warning Both child element and corner element must have valid preferredSize for layout calculation.
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*/
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@interface ASCornerLayoutSpec : ASLayoutSpec
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/**
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A layout spec that positions a corner element which relatives to the child element.
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@param child A child that is laid out to determine the size of this spec.
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@param corner A layoutElement object that is laid out to a corner on the child.
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@param location The corner position option.
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@return An ASCornerLayoutSpec object with a given child and an layoutElement that act as corner.
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*/
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- (instancetype)initWithChild:(id <ASLayoutElement>)child corner:(id <ASLayoutElement>)corner location:(ASCornerLayoutLocation)location AS_WARN_UNUSED_RESULT;
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/**
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A layout spec that positions a corner element which relatives to the child element.
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@param child A child that is laid out to determine the size of this spec.
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@param corner A layoutElement object that is laid out to a corner on the child.
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@param location The corner position option.
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@return An ASCornerLayoutSpec object with a given child and an layoutElement that act as corner.
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*/
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+ (instancetype)cornerLayoutSpecWithChild:(id <ASLayoutElement>)child corner:(id <ASLayoutElement>)corner location:(ASCornerLayoutLocation)location AS_WARN_UNUSED_RESULT;
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/**
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A layoutElement object that is laid out to a corner on the child.
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*/
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@property (nonatomic, strong) id <ASLayoutElement> corner;
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/**
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The corner position option.
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*/
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@property (nonatomic, assign) ASCornerLayoutLocation cornerLocation;
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/**
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The point which offsets from the corner location. Use this property to make delta
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distance from the default corner location. Default is CGPointZero.
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*/
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@property (nonatomic, assign) CGPoint offset;
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/**
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Whether should include corner element into layout size calculation. If included,
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the layout size will be the union size of both child and corner; If not included,
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the layout size will be only child's size. Default is NO.
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*/
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@property (nonatomic, assign) BOOL wrapsCorner;
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@end
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NS_ASSUME_NONNULL_END
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