132 lines
4.7 KiB
Objective-C
132 lines
4.7 KiB
Objective-C
// Copyright 2004-present Facebook. All Rights Reserved.
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#import <UIKit/UIKit.h>
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#import "Layout.h"
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#import "RCTViewNodeProtocol.h"
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@class RCTSparseArray;
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// TODO: amalgamate these enums?
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typedef NS_ENUM(NSUInteger, RCTLayoutLifecycle) {
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RCTLayoutLifecycleUninitialized = 0,
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RCTLayoutLifecycleComputed,
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RCTLayoutLifecycleDirtied,
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};
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// TODO: is this redundact now?
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typedef NS_ENUM(NSUInteger, RCTPropagationLifecycle) {
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RCTPropagationLifecycleUninitialized = 0,
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RCTPropagationLifecycleComputed,
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RCTPropagationLifecycleDirtied,
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};
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// TODO: move this to text node?
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typedef NS_ENUM(NSUInteger, RCTTextLifecycle) {
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RCTTextLifecycleUninitialized = 0,
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RCTTextLifecycleComputed,
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RCTTextLifecycleDirtied,
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};
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// TODO: is this redundact now?
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typedef void (^RCTApplierBlock)(RCTSparseArray *);
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/**
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* ShadowView tree mirrors RCT view tree. Every node is highly stateful.
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* 1. A node is in one of three lifecycles: uninitialized, computed, dirtied.
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* 1. RCTBridge may call any of the padding/margin/width/height/top/left setters. A setter would dirty
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* the node and all of its ancestors.
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* 2. At the end of each Bridge transaction, we call collectUpdatedFrames:widthConstraint:heightConstraint
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* at the root node to recursively lay out the entire hierarchy.
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* 3. If a node is "computed" and the constraint passed from above is identical to the constraint used to
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* perform the last computation, we skip laying out the subtree entirely.
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*/
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@interface RCTShadowView : NSObject <RCTViewNodeProtocol>
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@property (nonatomic, weak, readonly) RCTShadowView *superview;
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@property (nonatomic, assign, readonly) css_node_t *cssNode;
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@property (nonatomic, copy) NSString *moduleName;
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@property (nonatomic, assign) BOOL isBGColorExplicitlySet; // Used to propogate to children
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@property (nonatomic, strong) UIColor *backgroundColor; // Used to propogate to children
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@property (nonatomic, assign) RCTLayoutLifecycle layoutLifecycle;
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/**
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* isNewView - Used to track the first time the view is introduced into the hierarchy. It is initialized YES, then is
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* set to NO in RCTUIManager after the layout pass is done and all frames have been extracted to be applied to the
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* corresponding UIViews.
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*/
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@property (nonatomic, assign, getter=isNewView) BOOL newView;
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/**
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* Is this the shadowView for an RCTRootView
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*/
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@property (nonatomic, assign, getter=isReactRootView) BOOL reactRootView;
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/**
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* Position and dimensions.
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* Defaults to { 0, 0, NAN, NAN }
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*/
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@property (nonatomic, assign) CGFloat top;
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@property (nonatomic, assign) CGFloat left;
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@property (nonatomic, assign) CGFloat width;
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@property (nonatomic, assign) CGFloat height;
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@property (nonatomic, assign) CGRect frame;
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- (void)updateShadowViewLayout;
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/**
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* Border. Defaults to 0.
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*/
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- (void)setBorderWidth:(CGFloat)value;
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/**
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* Padding. Defaults to 0.
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*/
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@property (nonatomic, assign) CGFloat paddingTop;
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@property (nonatomic, assign) CGFloat paddingLeft;
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@property (nonatomic, assign) CGFloat paddingBottom;
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@property (nonatomic, assign) CGFloat paddingRight;
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- (void)setPadding:(CGFloat)padding;
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- (void)setPaddingVertical:(CGFloat)padding;
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- (void)setPaddingHorizontal:(CGFloat)padding;
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- (UIEdgeInsets)paddingAsInsets;
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/**
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* Flexbox properties. All zero/disabled by default
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*/
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@property (nonatomic, assign) css_flex_direction_t flexDirection;
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@property (nonatomic, assign) css_justify_t justifyContent;
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@property (nonatomic, assign) css_align_t alignSelf;
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@property (nonatomic, assign) css_align_t alignItems;
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@property (nonatomic, assign) css_position_type_t positionType;
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@property (nonatomic, assign) css_wrap_type_t flexWrap;
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@property (nonatomic, assign) CGFloat flex;
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- (void)collectUpdatedProperties:(NSMutableSet *)viewsWithNewProperties parentProperties:(NSDictionary *)parentProperties;
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- (void)collectRootUpdatedFrames:(NSMutableSet *)viewsWithNewFrame parentConstraint:(CGSize)parentConstraint;
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- (void)fillCSSNode:(css_node_t *)node;
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// The following are implementation details exposed to subclasses. Do not call them directly
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- (void)dirtyLayout;
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- (void)dirtyPropagation;
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- (void)dirtyText;
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- (BOOL)isTextDirty;
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- (void)setTextComputed;
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/**
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* Computes the recursive offset, meaning the sum of all descendant offsets -
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* this is the sum of all positions inset from parents. This is not merely the
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* sum of `top`/`left`s, as this function uses the *actual* positions of
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* children, not the style specified positions - it computes this based on the
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* resulting layout. It does not yet compensate for native scroll view insets or
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* transforms or anchor points. Returns an array containing the `x, y, width,
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* height` of the shadow view relative to the ancestor, or `nil` if the `view`
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* is not a descendent of `ancestor`.
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*/
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+ (CGRect)measureLayout:(RCTShadowView *)view relativeTo:(RCTShadowView *)ancestor;
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@end
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