244 lines
8.8 KiB
Objective-C
244 lines
8.8 KiB
Objective-C
/**
|
|
* Copyright (c) 2015-present, Facebook, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* This source code is licensed under the BSD-style license found in the
|
|
* LICENSE file in the root directory of this source tree. An additional grant
|
|
* of patent rights can be found in the PATENTS file in the same directory.
|
|
*/
|
|
|
|
#import <UIKit/UIKit.h>
|
|
|
|
#import <React/RCTComponent.h>
|
|
#import <React/RCTRootView.h>
|
|
#import <yoga/Yoga.h>
|
|
|
|
@class RCTSparseArray;
|
|
|
|
typedef NS_ENUM(NSUInteger, RCTUpdateLifecycle) {
|
|
RCTUpdateLifecycleUninitialized = 0,
|
|
RCTUpdateLifecycleComputed,
|
|
RCTUpdateLifecycleDirtied,
|
|
};
|
|
|
|
typedef void (^RCTApplierBlock)(NSDictionary<NSNumber *, UIView *> *viewRegistry);
|
|
|
|
/**
|
|
* ShadowView tree mirrors RCT view tree. Every node is highly stateful.
|
|
* 1. A node is in one of three lifecycles: uninitialized, computed, dirtied.
|
|
* 1. RCTBridge may call any of the padding/margin/width/height/top/left setters. A setter would dirty
|
|
* the node and all of its ancestors.
|
|
* 2. At the end of each Bridge transaction, we call collectUpdatedFrames:widthConstraint:heightConstraint
|
|
* at the root node to recursively lay out the entire hierarchy.
|
|
* 3. If a node is "computed" and the constraint passed from above is identical to the constraint used to
|
|
* perform the last computation, we skip laying out the subtree entirely.
|
|
*/
|
|
@interface RCTShadowView : NSObject <RCTComponent>
|
|
|
|
/**
|
|
* RCTComponent interface.
|
|
*/
|
|
- (NSArray<RCTShadowView *> *)reactSubviews NS_REQUIRES_SUPER;
|
|
- (RCTShadowView *)reactSuperview NS_REQUIRES_SUPER;
|
|
- (void)insertReactSubview:(RCTShadowView *)subview atIndex:(NSInteger)atIndex NS_REQUIRES_SUPER;
|
|
- (void)removeReactSubview:(RCTShadowView *)subview NS_REQUIRES_SUPER;
|
|
|
|
@property (nonatomic, weak, readonly) RCTShadowView *superview;
|
|
@property (nonatomic, assign, readonly) YGNodeRef cssNode;
|
|
@property (nonatomic, copy) NSString *viewName;
|
|
@property (nonatomic, strong) UIColor *backgroundColor; // Used to propagate to children
|
|
@property (nonatomic, copy) RCTDirectEventBlock onLayout;
|
|
|
|
/**
|
|
* isNewView - Used to track the first time the view is introduced into the hierarchy. It is initialized YES, then is
|
|
* set to NO in RCTUIManager after the layout pass is done and all frames have been extracted to be applied to the
|
|
* corresponding UIViews.
|
|
*/
|
|
@property (nonatomic, assign, getter=isNewView) BOOL newView;
|
|
|
|
/**
|
|
* isHidden - RCTUIManager uses this to determine whether or not the UIView should be hidden. Useful if the
|
|
* ShadowView determines that its UIView will be clipped and wants to hide it.
|
|
*/
|
|
@property (nonatomic, assign, getter=isHidden) BOOL hidden;
|
|
|
|
/**
|
|
* Computed layout direction for the view backed to Yoga node value.
|
|
*/
|
|
@property (nonatomic, assign, readonly) UIUserInterfaceLayoutDirection effectiveLayoutDirection;
|
|
|
|
/**
|
|
* Position and dimensions.
|
|
* Defaults to { 0, 0, NAN, NAN }.
|
|
*/
|
|
@property (nonatomic, assign) YGValue top;
|
|
@property (nonatomic, assign) YGValue left;
|
|
@property (nonatomic, assign) YGValue bottom;
|
|
@property (nonatomic, assign) YGValue right;
|
|
|
|
@property (nonatomic, assign) YGValue width;
|
|
@property (nonatomic, assign) YGValue height;
|
|
|
|
@property (nonatomic, assign) YGValue minWidth;
|
|
@property (nonatomic, assign) YGValue maxWidth;
|
|
@property (nonatomic, assign) YGValue minHeight;
|
|
@property (nonatomic, assign) YGValue maxHeight;
|
|
|
|
/**
|
|
* Convenient alias to `width` and `height` in pixels.
|
|
* Defaults to NAN in case of non-pixel dimention.
|
|
*/
|
|
@property (nonatomic, assign) CGSize size;
|
|
|
|
/**
|
|
* Border. Defaults to { 0, 0, 0, 0 }.
|
|
*/
|
|
@property (nonatomic, assign) float borderWidth;
|
|
@property (nonatomic, assign) float borderTopWidth;
|
|
@property (nonatomic, assign) float borderLeftWidth;
|
|
@property (nonatomic, assign) float borderBottomWidth;
|
|
@property (nonatomic, assign) float borderRightWidth;
|
|
|
|
/**
|
|
* Margin. Defaults to { 0, 0, 0, 0 }.
|
|
*/
|
|
@property (nonatomic, assign) YGValue margin;
|
|
@property (nonatomic, assign) YGValue marginVertical;
|
|
@property (nonatomic, assign) YGValue marginHorizontal;
|
|
@property (nonatomic, assign) YGValue marginTop;
|
|
@property (nonatomic, assign) YGValue marginLeft;
|
|
@property (nonatomic, assign) YGValue marginBottom;
|
|
@property (nonatomic, assign) YGValue marginRight;
|
|
|
|
/**
|
|
* Padding. Defaults to { 0, 0, 0, 0 }.
|
|
*/
|
|
@property (nonatomic, assign) YGValue padding;
|
|
@property (nonatomic, assign) YGValue paddingVertical;
|
|
@property (nonatomic, assign) YGValue paddingHorizontal;
|
|
@property (nonatomic, assign) YGValue paddingTop;
|
|
@property (nonatomic, assign) YGValue paddingLeft;
|
|
@property (nonatomic, assign) YGValue paddingBottom;
|
|
@property (nonatomic, assign) YGValue paddingRight;
|
|
|
|
- (UIEdgeInsets)paddingAsInsets;
|
|
|
|
/**
|
|
* Flexbox properties. All zero/disabled by default
|
|
*/
|
|
@property (nonatomic, assign) YGFlexDirection flexDirection;
|
|
@property (nonatomic, assign) YGJustify justifyContent;
|
|
@property (nonatomic, assign) YGAlign alignSelf;
|
|
@property (nonatomic, assign) YGAlign alignItems;
|
|
@property (nonatomic, assign) YGPositionType position;
|
|
@property (nonatomic, assign) YGWrap flexWrap;
|
|
|
|
@property (nonatomic, assign) float flexGrow;
|
|
@property (nonatomic, assign) float flexShrink;
|
|
@property (nonatomic, assign) YGValue flexBasis;
|
|
|
|
@property (nonatomic, assign) float aspectRatio;
|
|
|
|
- (void)setFlex:(float)flex;
|
|
|
|
/**
|
|
* z-index, used to override sibling order in the view
|
|
*/
|
|
@property (nonatomic, assign) NSInteger zIndex;
|
|
|
|
/**
|
|
* Clipping properties
|
|
*/
|
|
@property (nonatomic, assign) YGOverflow overflow;
|
|
|
|
/**
|
|
* Computed position of the view.
|
|
*/
|
|
@property (nonatomic, assign, readonly) CGRect frame;
|
|
|
|
/**
|
|
* Represents the natural size of the view, which is used when explicit size is not set or is ambiguous.
|
|
* Defaults to `{UIViewNoIntrinsicMetric, UIViewNoIntrinsicMetric}`.
|
|
*/
|
|
@property (nonatomic, assign) CGSize intrinsicContentSize;
|
|
|
|
/**
|
|
* Calculate property changes that need to be propagated to the view.
|
|
* The applierBlocks set contains RCTApplierBlock functions that must be applied
|
|
* on the main thread in order to update the view.
|
|
*/
|
|
- (void)collectUpdatedProperties:(NSMutableSet<RCTApplierBlock> *)applierBlocks
|
|
parentProperties:(NSDictionary<NSString *, id> *)parentProperties;
|
|
|
|
/**
|
|
* Process the updated properties and apply them to view. Shadow view classes
|
|
* that add additional propagating properties should override this method.
|
|
*/
|
|
- (NSDictionary<NSString *, id> *)processUpdatedProperties:(NSMutableSet<RCTApplierBlock> *)applierBlocks
|
|
parentProperties:(NSDictionary<NSString *, id> *)parentProperties NS_REQUIRES_SUPER;
|
|
|
|
/**
|
|
* Can be called by a parent on a child in order to calculate all views whose frame needs
|
|
* updating in that branch. Adds these frames to `viewsWithNewFrame`. Useful if layout
|
|
* enters a view where flex doesn't apply (e.g. Text) and then you want to resume flex
|
|
* layout on a subview.
|
|
*/
|
|
- (void)collectUpdatedFrames:(NSMutableSet<RCTShadowView *> *)viewsWithNewFrame
|
|
withFrame:(CGRect)frame
|
|
hidden:(BOOL)hidden
|
|
absolutePosition:(CGPoint)absolutePosition;
|
|
|
|
/**
|
|
* Apply the CSS layout.
|
|
* This method also calls `applyLayoutToChildren:` internally. The functionality
|
|
* is split into two methods so subclasses can override `applyLayoutToChildren:`
|
|
* while using default implementation of `applyLayoutNode:`.
|
|
*/
|
|
- (void)applyLayoutNode:(YGNodeRef)node
|
|
viewsWithNewFrame:(NSMutableSet<RCTShadowView *> *)viewsWithNewFrame
|
|
absolutePosition:(CGPoint)absolutePosition NS_REQUIRES_SUPER;
|
|
|
|
/**
|
|
* Enumerate the child nodes and tell them to apply layout.
|
|
*/
|
|
- (void)applyLayoutToChildren:(YGNodeRef)node
|
|
viewsWithNewFrame:(NSMutableSet<RCTShadowView *> *)viewsWithNewFrame
|
|
absolutePosition:(CGPoint)absolutePosition;
|
|
|
|
/**
|
|
* Return whether or not this node acts as a leaf node in the eyes of Yoga. For example
|
|
* RCTShadowText has children which it does not want Yoga to lay out so in the eyes of
|
|
* Yoga it is a leaf node.
|
|
*/
|
|
- (BOOL)isCSSLeafNode;
|
|
|
|
- (void)dirtyPropagation NS_REQUIRES_SUPER;
|
|
- (BOOL)isPropagationDirty;
|
|
|
|
- (void)dirtyText NS_REQUIRES_SUPER;
|
|
- (void)setTextComputed NS_REQUIRES_SUPER;
|
|
- (BOOL)isTextDirty;
|
|
|
|
/**
|
|
* As described in RCTComponent protocol.
|
|
*/
|
|
- (void)didUpdateReactSubviews NS_REQUIRES_SUPER;
|
|
- (void)didSetProps:(NSArray<NSString *> *)changedProps NS_REQUIRES_SUPER;
|
|
|
|
/**
|
|
* Computes the recursive offset, meaning the sum of all descendant offsets -
|
|
* this is the sum of all positions inset from parents. This is not merely the
|
|
* sum of `top`/`left`s, as this function uses the *actual* positions of
|
|
* children, not the style specified positions - it computes this based on the
|
|
* resulting layout. It does not yet compensate for native scroll view insets or
|
|
* transforms or anchor points.
|
|
*/
|
|
- (CGRect)measureLayoutRelativeToAncestor:(RCTShadowView *)ancestor;
|
|
|
|
/**
|
|
* Checks if the current shadow view is a descendant of the provided `ancestor`
|
|
*/
|
|
- (BOOL)viewIsDescendantOf:(RCTShadowView *)ancestor;
|
|
|
|
@end
|