145 lines
5.3 KiB
Objective-C
145 lines
5.3 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 <UIKit/UIKit.h>
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#import "RCTBridge.h"
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#import "RCTURLRequestHandler.h"
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@class ALAssetsLibrary;
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typedef void (^RCTImageLoaderProgressBlock)(int64_t progress, int64_t total);
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typedef void (^RCTImageLoaderCompletionBlock)(NSError *error, UIImage *image);
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typedef void (^RCTImageLoaderCancellationBlock)(void);
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@interface UIImage (React)
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@property (nonatomic, copy) CAKeyframeAnimation *reactKeyframeAnimation;
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@end
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@interface RCTImageLoader : NSObject <RCTBridgeModule, RCTURLRequestHandler>
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/**
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* Loads the specified image at the highest available resolution.
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* Can be called from any thread, will call back on an unspecified thread.
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*/
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- (RCTImageLoaderCancellationBlock)loadImageWithTag:(NSString *)imageTag
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callback:(RCTImageLoaderCompletionBlock)callback;
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/**
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* As above, but includes target size, scale and resizeMode, which are used to
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* select the optimal dimensions for the loaded image.
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*/
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- (RCTImageLoaderCancellationBlock)loadImageWithTag:(NSString *)imageTag
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size:(CGSize)size
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scale:(CGFloat)scale
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resizeMode:(UIViewContentMode)resizeMode
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progressBlock:(RCTImageLoaderProgressBlock)progressBlock
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completionBlock:(RCTImageLoaderCompletionBlock)completionBlock;
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/**
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* Finds an appropriate image decoder and passes the target size, scale and
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* resizeMode for optimal image decoding. Can be called from any thread,
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* will call callback on an unspecified thread.
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*/
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- (RCTImageLoaderCancellationBlock)decodeImageData:(NSData *)imageData
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size:(CGSize)size
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scale:(CGFloat)scale
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resizeMode:(UIViewContentMode)resizeMode
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completionBlock:(RCTImageLoaderCompletionBlock)completionBlock;
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@end
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@interface RCTBridge (RCTImageLoader)
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/**
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* The shared image loader instance
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*/
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@property (nonatomic, readonly) RCTImageLoader *imageLoader;
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@end
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/**
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* Provides the interface needed to register an image loader. Image data
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* loaders are also bridge modules, so should be registered using
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* RCT_EXPORT_MODULE().
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*/
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@protocol RCTImageURLLoader <RCTBridgeModule>
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/**
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* Indicates whether this data loader is capable of processing the specified
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* request URL. Typically the handler would examine the scheme/protocol of the
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* URL to determine this.
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*/
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- (BOOL)canLoadImageURL:(NSURL *)requestURL;
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/**
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* Send a network request to load the request URL. The method should call the
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* progressHandler (if applicable) and the completionHandler when the request
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* has finished. The method should also return a cancellation block, if
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* applicable.
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*/
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- (RCTImageLoaderCancellationBlock)loadImageForURL:(NSURL *)imageURL
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size:(CGSize)size
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scale:(CGFloat)scale
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resizeMode:(UIViewContentMode)resizeMode
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progressHandler:(RCTImageLoaderProgressBlock)progressHandler
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completionHandler:(RCTImageLoaderCompletionBlock)completionHandler;
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@optional
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/**
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* If more than one RCTImageURLLoader responds YES to `-canLoadImageURL:`
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* then `loaderPriority` is used to determine which one to use. The loader
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* with the highest priority will be selected. Default priority is zero. If
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* two or more valid loaders have the same priority, the selection order is
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* undefined.
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*/
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- (float)loaderPriority;
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@end
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/**
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* Provides the interface needed to register an image decoder. Image decoders
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* are also bridge modules, so should be registered using RCT_EXPORT_MODULE().
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*/
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@protocol RCTImageDataDecoder <RCTBridgeModule>
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/**
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* Indicates whether this handler is capable of decoding the specified data.
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* Typically the handler would examine some sort of header data to determine
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* this.
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*/
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- (BOOL)canDecodeImageData:(NSData *)imageData;
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/**
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* Decode an image from the data object. The method should call the
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* completionHandler when the decoding operation has finished. The method
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* should also return a cancellation block, if applicable.
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*/
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- (RCTImageLoaderCancellationBlock)decodeImageData:(NSData *)imageData
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size:(CGSize)size
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scale:(CGFloat)scale
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resizeMode:(UIViewContentMode)resizeMode
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completionHandler:(RCTImageLoaderCompletionBlock)completionHandler;
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@optional
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/**
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* If more than one RCTImageDataDecoder responds YES to `-canDecodeImageData:`
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* then `decoderPriority` is used to determine which one to use. The decoder
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* with the highest priority will be selected. Default priority is zero.
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* If two or more valid decoders have the same priority, the selection order is
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* undefined.
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*/
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- (float)decoderPriority;
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@end
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