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- /*
- * Copyright (c) Facebook, Inc. and its affiliates.
- *
- * This source code is licensed under the MIT license found in the
- * LICENSE file in the root directory of this source tree.
- */
- #import <Foundation/Foundation.h>
- @class CADisplayLink;
- /**
- * Interface containing the information about the last screen refresh.
- */
- @interface RCTFrameUpdate : NSObject
- /**
- * Timestamp for the actual screen refresh
- */
- @property (nonatomic, readonly) NSTimeInterval timestamp;
- /**
- * Time since the last frame update ( >= 16.6ms )
- */
- @property (nonatomic, readonly) NSTimeInterval deltaTime;
- - (instancetype)initWithDisplayLink:(CADisplayLink *)displayLink NS_DESIGNATED_INITIALIZER;
- @end
- /**
- * Protocol that must be implemented for subscribing to display refreshes (DisplayLink updates)
- */
- @protocol RCTFrameUpdateObserver <NSObject>
- /**
- * Method called on every screen refresh (if paused != YES)
- */
- - (void)didUpdateFrame:(RCTFrameUpdate *)update;
- /**
- * Synthesize and set to true to pause the calls to -[didUpdateFrame:]
- */
- @property (nonatomic, readonly, getter=isPaused) BOOL paused;
- /**
- * Callback for pause/resume observer.
- * Observer should call it when paused property is changed.
- */
- @property (nonatomic, copy) dispatch_block_t pauseCallback;
- @end
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