70 lines
1.9 KiB
Objective-C
70 lines
1.9 KiB
Objective-C
/**
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* Copyright (c) 2015-present, Facebook, Inc.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*/
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#import "RCTLocalAssetImageLoader.h"
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#import <stdatomic.h>
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#import <React/RCTUtils.h>
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@implementation RCTLocalAssetImageLoader
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RCT_EXPORT_MODULE()
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- (BOOL)canLoadImageURL:(NSURL *)requestURL
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{
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return RCTIsLocalAssetURL(requestURL);
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}
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- (BOOL)requiresScheduling
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{
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// Don't schedule this loader on the URL queue so we can load the
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// local assets synchronously to avoid flickers.
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return NO;
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}
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- (BOOL)shouldCacheLoadedImages
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{
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// UIImage imageNamed handles the caching automatically so we don't want
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// to add it to the image cache.
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return NO;
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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:(RCTResizeMode)resizeMode
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progressHandler:(RCTImageLoaderProgressBlock)progressHandler
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partialLoadHandler:(RCTImageLoaderPartialLoadBlock)partialLoadHandler
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completionHandler:(RCTImageLoaderCompletionBlock)completionHandler
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{
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__block atomic_bool cancelled = ATOMIC_VAR_INIT(NO);
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RCTExecuteOnMainQueue(^{
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if (atomic_load(&cancelled)) {
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return;
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}
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UIImage *image = RCTImageFromLocalAssetURL(imageURL);
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if (image) {
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if (progressHandler) {
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progressHandler(1, 1);
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}
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completionHandler(nil, image);
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} else {
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NSString *message = [NSString stringWithFormat:@"Could not find image %@", imageURL];
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RCTLogWarn(@"%@", message);
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completionHandler(RCTErrorWithMessage(message), nil);
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}
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});
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return ^{
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atomic_store(&cancelled, YES);
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};
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}
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@end
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