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8897614f0e
* Initial commit for adding a size constraint to ASLayoutable's * Some more commits * Fix sample projects in extra/ * Remove preferredFrameSize test of ASEditableTextNode * Remove preferredFrameSize from examples_extra * Add deprecation warning to -[ASDisplayNode preferredFrameSize] * Add deprecation warning to -[ASDisplayNode measureWithSizeRange:] * Commit * Commit * Remove ASRelativeSizeRange * Make ASRelativeSize private * Adjust examples * Improve setting of -[ASLayoutable size] with points or fractions * Add ASWrapperLayoutSpec * Improve creation of ASRelativeDimension * Add `preferredFrameSize` back and add deprecated logging * Add `layoutSpecBlock` setter and getter and add locking for it * Add better documentation and fix macros to create ASRelativeDimension * Create new ASSizeRangeMake with just a CGSize as parameter * Update Kitten and Social App Layout example * Add layoutThatFits: and deprecate measure: * Rename ASRelativeDimension to ASDimension * Fix examples for ASDimension renaming * Remove fancy height and width setter * Fix ASDimension helper * Rename -[ASLayout layoutableObject] to -[ASLayout layoutable] * Update layout related methods and more clearer documentation around how to use it * Deprecate old ASLayout class constructors * Don't unnecessary recalculate layout if constrained or parent size did not change * Use shared pointer for ASDisplayNodeLayout * Fix rebase conflicts * Add documentation and move implementation in mm file of ASDisplayNodeLayout * Fix test errors * Rename ASSize to ASLayoutableSize * Address comments * Rename setSizeFromCGSize to setSizeWithCGSize * Improve inline functions in ASDimension * Fix rebase conflicts
159 lines
5.2 KiB
Objective-C
159 lines
5.2 KiB
Objective-C
//
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// ASLayout.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/ASAssert.h>
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#import <AsyncDisplayKit/ASLayoutable.h>
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#import <AsyncDisplayKit/ASDimension.h>
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NS_ASSUME_NONNULL_BEGIN
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ASDISPLAYNODE_EXTERN_C_BEGIN
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extern CGPoint const CGPointNull;
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extern BOOL CGPointIsNull(CGPoint point);
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/**
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* Safely calculates the layout of the given root layoutable by guarding against nil nodes.
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* @param rootLayoutable The root node to calculate the layout for.
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* @param sizeRange The size range to calculate the root layout within.
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*/
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extern ASLayout *ASCalculateRootLayout(id<ASLayoutable> rootLayoutable, const ASSizeRange sizeRange);
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/**
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* Safely computes the layout of the given node by guarding against nil nodes.
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* @param component The component to calculate the layout for.
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* @param sizeRange The size range to calculate the node layout within.
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* @param parentSize The parent size of the node to calculate the layout for.
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*/
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extern ASLayout *ASCalculateLayout(id<ASLayoutable> layoutable, const ASSizeRange sizeRange, const CGSize parentSize);
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ASDISPLAYNODE_EXTERN_C_END
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/**
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* A node in the layout tree that represents the size and position of the object that created it (ASLayoutable).
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*/
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@interface ASLayout : NSObject
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/**
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* The underlying object described by this layout
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*/
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@property (nonatomic, weak, readonly) id<ASLayoutable> layoutable;
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/**
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* The type of ASLayoutable that created this layout
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*/
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@property (nonatomic, assign, readonly) ASLayoutableType type;
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/**
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* Size of the current layout
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*/
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@property (nonatomic, assign, readonly) CGSize size;
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/**
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* Position in parent. Default to CGPointNull.
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*
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* @discussion When being used as a sublayout, this property must not equal CGPointNull.
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*/
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@property (nonatomic, assign, readwrite) CGPoint position;
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/**
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* Array of ASLayouts. Each must have a valid non-null position.
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*/
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@property (nonatomic, copy, readonly) NSArray<ASLayout *> *sublayouts;
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/**
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* @abstract Returns a valid frame for the current layout computed with the size and position.
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* @discussion Clamps the layout's origin or position to 0 if any of the calculated values are infinite.
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*/
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@property (nonatomic, assign, readonly) CGRect frame;
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/**
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* Designated initializer
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*/
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- (instancetype)initWithLayoutable:(id<ASLayoutable>)layoutable
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size:(CGSize)size
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position:(CGPoint)position
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sublayouts:(nullable NSArray<ASLayout *> *)sublayouts NS_DESIGNATED_INITIALIZER;
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/**
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* Convenience class initializer for layout construction.
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*
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* @param layoutable The backing ASLayoutable object.
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* @param size The size of this layout.
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* @param position The position of this layout within its parent (if available).
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* @param sublayouts Sublayouts belong to the new layout.
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*/
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+ (instancetype)layoutWithLayoutable:(id<ASLayoutable>)layoutable
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size:(CGSize)size
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position:(CGPoint)position
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sublayouts:(nullable NSArray<ASLayout *> *)sublayouts;
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/**
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* Convenience initializer that has CGPointNull position.
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* Best used by ASDisplayNode subclasses that are manually creating a layout for -calculateLayoutThatFits:,
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* or for ASLayoutSpec subclasses that are referencing the "self" level in the layout tree,
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* or for creating a sublayout of which the position is yet to be determined.
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*
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* @param layoutable The backing ASLayoutable object.
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* @param size The size of this layout.
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* @param sublayouts Sublayouts belong to the new layout.
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*/
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+ (instancetype)layoutWithLayoutable:(id<ASLayoutable>)layoutable
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size:(CGSize)size
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sublayouts:(nullable NSArray<ASLayout *> *)sublayouts;
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/**
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* Convenience that has CGPointNull position and no sublayouts.
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* Best used for creating a layout that has no sublayouts, and is either a root one
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* or a sublayout of which the position is yet to be determined.
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*
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* @param layoutable The backing ASLayoutable object.
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* @param size The size of this layout.
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*/
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+ (instancetype)layoutWithLayoutable:(id<ASLayoutable>)layoutable
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size:(CGSize)size;
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/**
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* Convenience initializer that creates a layout based on the values of the given layout, with a new position
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*
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* @param layout The layout to use to create the new layout
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* @param position The position of the new layout
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*/
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+ (instancetype)layoutWithLayout:(ASLayout *)layout position:(CGPoint)position;
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/**
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* Traverses the existing layout tree and generates a new tree that represents only ASDisplayNode layouts
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*/
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- (ASLayout *)filteredNodeLayoutTree;
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@end
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@interface ASLayout (Unavailable)
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- (instancetype)init __unavailable;
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@end
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#pragma mark - Debugging
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@interface ASLayout (Debugging)
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/**
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* Recrusively output the description of the layout tree.
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*/
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- (NSString *)recursiveDescription;
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@end
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NS_ASSUME_NONNULL_END
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