123 строки
4.0 KiB
Objective-C
123 строки
4.0 KiB
Objective-C
/**
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* Copyright (c) 2015-present, Facebook, Inc.
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* All rights reserved.
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*
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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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#import <Foundation/Foundation.h>
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#import <React/RCTSurfaceStage.h>
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NS_ASSUME_NONNULL_BEGIN
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@class RCTBridge;
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@class RCTSurfaceView;
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@protocol RCTSurfaceDelegate;
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/**
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* RCTSurface instance represents React Native-powered piece of a user interface
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* which can be a full-screen app, separate modal view controller,
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* or even small widget.
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* It is called "Surface".
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*
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* The RCTSurface instance is completely thread-safe by design;
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* it can be created on any thread, and any its method can be called from
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* any thread (if the opposite is not mentioned explicitly).
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*
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* The primary goals of the RCTSurface are:
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* * ability to measure and layout the surface in a thread-safe
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* and synchronous manner;
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* * ability to create a UIView instance on demand (later);
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* * ability to communicate the current stage of the surface granularly.
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*/
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@interface RCTSurface : NSObject
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@property (atomic, readonly) RCTSurfaceStage stage;
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@property (atomic, readonly) RCTBridge *bridge;
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@property (atomic, readonly) NSString *moduleName;
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@property (atomic, readonly) NSNumber *rootViewTag;
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@property (atomic, readwrite, weak, nullable) id<RCTSurfaceDelegate> delegate;
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@property (atomic, copy, readwrite) NSDictionary *properties;
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- (instancetype)initWithBridge:(RCTBridge *)bridge
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moduleName:(NSString *)moduleName
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initialProperties:(NSDictionary *)initialProperties NS_DESIGNATED_INITIALIZER;
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#pragma mark - Dealing with UIView representation, the Main thread only access
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/**
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* Creates (if needed) and returns `UIView` instance which represents the Surface.
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* The Surface will cache and *retain* this object.
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* Returning the UIView instance does not mean that the Surface is ready
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* to execute and layout. It can be just a handler which Surface will use later
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* to mount the actual views.
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* RCTSurface does not control (or influence in any way) the size or origin
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* of this view. Some superview (or another owner) must use other methods
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* of this class to setup proper layout and interop interactions with UIKit
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* or another UI framework.
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* This method must be called only from the main queue.
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*/
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- (RCTSurfaceView *)view;
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#pragma mark - Layout: Setting the size constrains
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/**
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* Sets `minimumSize` and `maximumSize` layout constraints for the Surface.
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*/
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- (void)setMinimumSize:(CGSize)minimumSize
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maximumSize:(CGSize)maximumSize;
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/**
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* Previously set `minimumSize` layout constraint.
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* Defaults to `{0, 0}`.
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*/
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@property (atomic, assign, readonly) CGSize minimumSize;
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/**
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* Previously set `maximumSize` layout constraint.
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* Defaults to `{CGFLOAT_MAX, CGFLOAT_MAX}`.
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*/
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@property (atomic, assign, readonly) CGSize maximumSize;
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/**
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* Simple shortcut to `-[RCTSurface setMinimumSize:size maximumSize:size]`.
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*/
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- (void)setSize:(CGSize)size;
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#pragma mark - Layout: Measuring
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/**
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* Measures the Surface with given constraints.
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* This method does not cause any side effects on the surface object.
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*/
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- (CGSize)sizeThatFitsMinimumSize:(CGSize)minimumSize
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maximumSize:(CGSize)maximumSize;
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/**
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* Return the current size of the root view based on (but not clamp by) current
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* size constraints.
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*/
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@property (atomic, assign, readonly) CGSize intrinsicSize;
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#pragma mark - Synchronous waiting
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/**
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* Synchronously blocks the current thread up to given `timeout` until
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* the Surface reaches `stage`.
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* Limitations:
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* - Do nothing, if called on `UIManager` queue.
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* - Calling on the main queue with `RCTSurfaceStageSurfaceDidInitialMounting`
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* stage temporary is not supported; in this case the stage will be
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* downgraded to `RCTSurfaceStageSurfaceDidInitialLayout`.
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*/
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- (BOOL)synchronouslyWaitForStage:(RCTSurfaceStage)stage timeout:(NSTimeInterval)timeout;
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@end
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NS_ASSUME_NONNULL_END
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