124 lines
3.6 KiB
Objective-C
124 lines
3.6 KiB
Objective-C
/*
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* This file is part of the SDWebImage package.
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* (c) Olivier Poitrey <rs@dailymotion.com>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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#import "SDImageLoadersManager.h"
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#import "SDWebImageDownloader.h"
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#import "SDInternalMacros.h"
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@interface SDImageLoadersManager ()
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@property (nonatomic, strong, nonnull) NSMutableArray<id<SDImageLoader>> *imageLoaders;
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@end
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@implementation SDImageLoadersManager {
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SD_LOCK_DECLARE(_loadersLock);
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}
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+ (SDImageLoadersManager *)sharedManager {
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static dispatch_once_t onceToken;
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static SDImageLoadersManager *manager;
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dispatch_once(&onceToken, ^{
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manager = [[SDImageLoadersManager alloc] init];
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});
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return manager;
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}
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- (instancetype)init {
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self = [super init];
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if (self) {
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// initialize with default image loaders
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_imageLoaders = [NSMutableArray arrayWithObject:[SDWebImageDownloader sharedDownloader]];
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SD_LOCK_INIT(_loadersLock);
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}
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return self;
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}
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- (NSArray<id<SDImageLoader>> *)loaders {
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SD_LOCK(_loadersLock);
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NSArray<id<SDImageLoader>>* loaders = [_imageLoaders copy];
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SD_UNLOCK(_loadersLock);
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return loaders;
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}
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- (void)setLoaders:(NSArray<id<SDImageLoader>> *)loaders {
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SD_LOCK(_loadersLock);
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[_imageLoaders removeAllObjects];
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if (loaders.count) {
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[_imageLoaders addObjectsFromArray:loaders];
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}
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SD_UNLOCK(_loadersLock);
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}
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#pragma mark - Loader Property
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- (void)addLoader:(id<SDImageLoader>)loader {
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if (![loader conformsToProtocol:@protocol(SDImageLoader)]) {
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return;
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}
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SD_LOCK(_loadersLock);
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[_imageLoaders addObject:loader];
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SD_UNLOCK(_loadersLock);
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}
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- (void)removeLoader:(id<SDImageLoader>)loader {
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if (![loader conformsToProtocol:@protocol(SDImageLoader)]) {
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return;
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}
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SD_LOCK(_loadersLock);
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[_imageLoaders removeObject:loader];
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SD_UNLOCK(_loadersLock);
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}
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#pragma mark - SDImageLoader
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- (BOOL)canRequestImageForURL:(nullable NSURL *)url {
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return [self canRequestImageForURL:url options:0 context:nil];
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}
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- (BOOL)canRequestImageForURL:(NSURL *)url options:(SDWebImageOptions)options context:(SDWebImageContext *)context {
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NSArray<id<SDImageLoader>> *loaders = self.loaders;
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for (id<SDImageLoader> loader in loaders.reverseObjectEnumerator) {
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if ([loader respondsToSelector:@selector(canRequestImageForURL:options:context:)]) {
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if ([loader canRequestImageForURL:url options:options context:context]) {
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return YES;
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}
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} else {
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if ([loader canRequestImageForURL:url]) {
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return YES;
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}
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}
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}
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return NO;
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}
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- (id<SDWebImageOperation>)requestImageWithURL:(NSURL *)url options:(SDWebImageOptions)options context:(SDWebImageContext *)context progress:(SDImageLoaderProgressBlock)progressBlock completed:(SDImageLoaderCompletedBlock)completedBlock {
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if (!url) {
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return nil;
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}
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NSArray<id<SDImageLoader>> *loaders = self.loaders;
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for (id<SDImageLoader> loader in loaders.reverseObjectEnumerator) {
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if ([loader canRequestImageForURL:url]) {
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return [loader requestImageWithURL:url options:options context:context progress:progressBlock completed:completedBlock];
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}
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}
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return nil;
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}
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- (BOOL)shouldBlockFailedURLWithURL:(NSURL *)url error:(NSError *)error {
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NSArray<id<SDImageLoader>> *loaders = self.loaders;
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for (id<SDImageLoader> loader in loaders.reverseObjectEnumerator) {
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if ([loader canRequestImageForURL:url]) {
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return [loader shouldBlockFailedURLWithURL:url error:error];
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}
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}
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return NO;
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}
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@end
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