82 lines
2.2 KiB
Objective-C
82 lines
2.2 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 "RCTAssetBundleImageLoader.h"
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#import "RCTUtils.h"
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@implementation RCTAssetBundleImageLoader
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RCT_EXPORT_MODULE()
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- (NSString *)imageNameForRequestURL:(NSURL *)requestURL
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{
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if (!requestURL.fileURL) {
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return nil;
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}
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NSString *resourcesPath = [NSBundle bundleForClass:[self class]].resourcePath;
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NSString *requestPath = requestURL.absoluteURL.path;
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if (requestPath.length < resourcesPath.length + 1) {
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return nil;
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}
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return [requestPath substringFromIndex:resourcesPath.length + 1];
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}
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- (BOOL)canLoadImageURL:(NSURL *)requestURL
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{
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NSString *imageName = [self imageNameForRequestURL:requestURL];
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if (!imageName.length) {
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return NO;
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}
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NSBundle *bundle = [NSBundle bundleForClass:[self class]];
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if ([bundle URLForResource:imageName withExtension:nil] ||
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[bundle URLForResource:imageName withExtension:@"png"]) {
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return YES;
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}
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return imageName.pathComponents.count == 1 && !imageName.pathExtension.length;
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}
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- (RCTImageLoaderCancellationBlock)loadImageForURL:(NSURL *)imageURL size:(CGSize)size scale:(CGFloat)scale resizeMode:(UIViewContentMode)resizeMode progressHandler:(RCTImageLoaderProgressBlock)progressHandler completionHandler:(RCTImageLoaderCompletionBlock)completionHandler
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{
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NSString *imageName = [self imageNameForRequestURL:imageURL];
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__block BOOL cancelled = NO;
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dispatch_async(dispatch_get_main_queue(), ^{
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if (cancelled) {
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return;
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}
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UIImage *image = [UIImage imageNamed:imageName];
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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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if (completionHandler) {
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completionHandler(nil, image);
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}
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} else {
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if (completionHandler) {
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NSString *message = [NSString stringWithFormat:@"Could not find image named %@", imageName];
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completionHandler(RCTErrorWithMessage(message), nil);
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}
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}
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});
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return ^{
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cancelled = YES;
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};
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}
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@end
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