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https://github.com/status-im/react-native.git
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6153fffb30
- Add back providesModule transform to JSAppServer | Joseph Savona - [ReactKit] fix open source performance issue | John Harper - [ReactKit] improve ReactIOSEventEmitter logics | Andrew Rasmussen - [reactkit] fix web view JS executor and bind it to Command-d | John Harper - Removed hardcoded RCTModuleIDs | Nick Lockwood - [ReactKit] Animated GIF support | Alex Akers - [ReactKit] Update RCTBridge to support non-`id` argument types | Alex Akers - [reactkit] fix typo in RCTCopyProperty() change | John Harper - [reactkit] fix shadow view crash on missing properties | John Harper - [reactkit] fix transform keypath | John Harper
82 lines
2.1 KiB
Objective-C
82 lines
2.1 KiB
Objective-C
// Copyright 2004-present Facebook. All Rights Reserved.
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#import "RCTImageDownloader.h"
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#import "RCTUtils.h"
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// TODO: something a bit more sophisticated
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@implementation RCTImageDownloader
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+ (instancetype)sharedInstance
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{
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RCTAssertMainThread();
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static RCTImageDownloader *sharedInstance;
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static dispatch_once_t onceToken;
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dispatch_once(&onceToken, ^{
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sharedInstance = [[self alloc] init];
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});
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return sharedInstance;
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}
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- (id)downloadDataForURL:(NSURL *)url
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block:(RCTDataDownloadBlock)block
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{
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NSURLSessionDataTask *task = [[NSURLSession sharedSession] dataTaskWithURL:url completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
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// Dispatch back to main thread
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dispatch_async(dispatch_get_main_queue(), ^{
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block(data, error);
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});
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}];
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[task resume];
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return task;
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}
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- (id)downloadImageForURL:(NSURL *)url
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size:(CGSize)size
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scale:(CGFloat)scale
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block:(RCTImageDownloadBlock)block
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{
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NSURLSessionDataTask *task = [[NSURLSession sharedSession] dataTaskWithURL:url completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
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UIImage *image = [UIImage imageWithData:data scale:scale];
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// TODO: cache compressed image
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CGSize imageSize = size;
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if (CGSizeEqualToSize(imageSize, CGSizeZero)) {
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imageSize = image.size;
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}
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CGFloat imageScale = scale;
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if (imageScale == 0 || imageScale > image.scale) {
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imageScale = image.scale;
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}
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if (image) {
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// Decompress on background thread
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UIGraphicsBeginImageContextWithOptions(imageSize, NO, imageScale);
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[image drawInRect:(CGRect){{0, 0}, imageSize}];
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image = UIGraphicsGetImageFromCurrentImageContext();
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UIGraphicsEndImageContext();
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// TODO: cache decompressed images at each requested size
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}
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// Dispatch back to main thread
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dispatch_async(dispatch_get_main_queue(), ^{
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block(image, error);
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});
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}];
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[task resume];
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return task;
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}
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- (void)cancelDownload:(id)downloadToken
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{
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[(NSURLSessionDataTask *)downloadToken cancel];
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}
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@end
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