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SDWebImageManager.m
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SDWebImageManager.m
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/*
* This file is part of the SDWebImage package.
* (c) Olivier Poitrey <rs@dailymotion.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
#import "SDWebImageManager.h"
#import "SDImageCache.h"
#import "SDWebImageDownloader.h"
#import "UIImage+Metadata.h"
#import "SDAssociatedObject.h"
#import "SDWebImageError.h"
#import "SDInternalMacros.h"
static id<SDImageCache> _defaultImageCache;
static id<SDImageLoader> _defaultImageLoader;
@interface SDWebImageCombinedOperation ()
@property (assign, nonatomic, getter = isCancelled) BOOL cancelled;
@property (strong, nonatomic, readwrite, nullable) id<SDWebImageOperation> loaderOperation;
@property (strong, nonatomic, readwrite, nullable) id<SDWebImageOperation> cacheOperation;
@property (weak, nonatomic, nullable) SDWebImageManager *manager;
@end
@interface SDWebImageManager () {
SD_LOCK_DECLARE(_failedURLsLock); // a lock to keep the access to `failedURLs` thread-safe
SD_LOCK_DECLARE(_runningOperationsLock); // a lock to keep the access to `runningOperations` thread-safe
}
@property (strong, nonatomic, readwrite, nonnull) SDImageCache *imageCache;
@property (strong, nonatomic, readwrite, nonnull) id<SDImageLoader> imageLoader;
@property (strong, nonatomic, nonnull) NSMutableSet<NSURL *> *failedURLs;
@property (strong, nonatomic, nonnull) NSMutableSet<SDWebImageCombinedOperation *> *runningOperations;
@end
@implementation SDWebImageManager
+ (id<SDImageCache>)defaultImageCache {
return _defaultImageCache;
}
+ (void)setDefaultImageCache:(id<SDImageCache>)defaultImageCache {
if (defaultImageCache && ![defaultImageCache conformsToProtocol:@protocol(SDImageCache)]) {
return;
}
_defaultImageCache = defaultImageCache;
}
+ (id<SDImageLoader>)defaultImageLoader {
return _defaultImageLoader;
}
+ (void)setDefaultImageLoader:(id<SDImageLoader>)defaultImageLoader {
if (defaultImageLoader && ![defaultImageLoader conformsToProtocol:@protocol(SDImageLoader)]) {
return;
}
_defaultImageLoader = defaultImageLoader;
}
+ (nonnull instancetype)sharedManager {
static dispatch_once_t once;
static id instance;
dispatch_once(&once, ^{
instance = [self new];
});
return instance;
}
- (nonnull instancetype)init {
id<SDImageCache> cache = [[self class] defaultImageCache];
if (!cache) {
cache = [SDImageCache sharedImageCache];
}
id<SDImageLoader> loader = [[self class] defaultImageLoader];
if (!loader) {
loader = [SDWebImageDownloader sharedDownloader];
}
return [self initWithCache:cache loader:loader];
}
- (nonnull instancetype)initWithCache:(nonnull id<SDImageCache>)cache loader:(nonnull id<SDImageLoader>)loader {
if ((self = [super init])) {
_imageCache = cache;
_imageLoader = loader;
_failedURLs = [NSMutableSet new];
SD_LOCK_INIT(_failedURLsLock);
_runningOperations = [NSMutableSet new];
SD_LOCK_INIT(_runningOperationsLock);
}
return self;
}
- (nullable NSString *)cacheKeyForURL:(nullable NSURL *)url {
if (!url) {
return @"";
}
NSString *key;
// Cache Key Filter
id<SDWebImageCacheKeyFilter> cacheKeyFilter = self.cacheKeyFilter;
if (cacheKeyFilter) {
key = [cacheKeyFilter cacheKeyForURL:url];
} else {
key = url.absoluteString;
}
return key;
}
- (nullable NSString *)cacheKeyForURL:(nullable NSURL *)url context:(nullable SDWebImageContext *)context {
if (!url) {
return @"";
}
NSString *key;
// Cache Key Filter
id<SDWebImageCacheKeyFilter> cacheKeyFilter = self.cacheKeyFilter;
if (context[SDWebImageContextCacheKeyFilter]) {
cacheKeyFilter = context[SDWebImageContextCacheKeyFilter];
}
if (cacheKeyFilter) {
key = [cacheKeyFilter cacheKeyForURL:url];
} else {
key = url.absoluteString;
}
// Thumbnail Key Appending
NSValue *thumbnailSizeValue = context[SDWebImageContextImageThumbnailPixelSize];
if (thumbnailSizeValue != nil) {
CGSize thumbnailSize = CGSizeZero;
#if SD_MAC
thumbnailSize = thumbnailSizeValue.sizeValue;
#else
thumbnailSize = thumbnailSizeValue.CGSizeValue;
#endif
BOOL preserveAspectRatio = YES;
NSNumber *preserveAspectRatioValue = context[SDWebImageContextImagePreserveAspectRatio];
if (preserveAspectRatioValue != nil) {
preserveAspectRatio = preserveAspectRatioValue.boolValue;
}
key = SDThumbnailedKeyForKey(key, thumbnailSize, preserveAspectRatio);
}
// Transformer Key Appending
id<SDImageTransformer> transformer = self.transformer;
if (context[SDWebImageContextImageTransformer]) {
transformer = context[SDWebImageContextImageTransformer];
if (![transformer conformsToProtocol:@protocol(SDImageTransformer)]) {
transformer = nil;
}
}
if (transformer) {
key = SDTransformedKeyForKey(key, transformer.transformerKey);
}
return key;
}
- (SDWebImageCombinedOperation *)loadImageWithURL:(NSURL *)url options:(SDWebImageOptions)options progress:(SDImageLoaderProgressBlock)progressBlock completed:(SDInternalCompletionBlock)completedBlock {
return [self loadImageWithURL:url options:options context:nil progress:progressBlock completed:completedBlock];
}
- (SDWebImageCombinedOperation *)loadImageWithURL:(nullable NSURL *)url
options:(SDWebImageOptions)options
context:(nullable SDWebImageContext *)context
progress:(nullable SDImageLoaderProgressBlock)progressBlock
completed:(nonnull SDInternalCompletionBlock)completedBlock {
// Invoking this method without a completedBlock is pointless
NSAssert(completedBlock != nil, @"If you mean to prefetch the image, use -[SDWebImagePrefetcher prefetchURLs] instead");
// Very common mistake is to send the URL using NSString object instead of NSURL. For some strange reason, Xcode won't
// throw any warning for this type mismatch. Here we failsafe this error by allowing URLs to be passed as NSString.
if ([url isKindOfClass:NSString.class]) {
url = [NSURL URLWithString:(NSString *)url];
}
// Prevents app crashing on argument type error like sending NSNull instead of NSURL
if (![url isKindOfClass:NSURL.class]) {
url = nil;
}
SDWebImageCombinedOperation *operation = [SDWebImageCombinedOperation new];
operation.manager = self;
BOOL isFailedUrl = NO;
if (url) {
SD_LOCK(_failedURLsLock);
isFailedUrl = [self.failedURLs containsObject:url];
SD_UNLOCK(_failedURLsLock);
}
if (url.absoluteString.length == 0 || (!(options & SDWebImageRetryFailed) && isFailedUrl)) {
NSString *description = isFailedUrl ? @"Image url is blacklisted" : @"Image url is nil";
NSInteger code = isFailedUrl ? SDWebImageErrorBlackListed : SDWebImageErrorInvalidURL;
[self callCompletionBlockForOperation:operation completion:completedBlock error:[NSError errorWithDomain:SDWebImageErrorDomain code:code userInfo:@{NSLocalizedDescriptionKey : description}] url:url];
return operation;
}
SD_LOCK(_runningOperationsLock);
[self.runningOperations addObject:operation];
SD_UNLOCK(_runningOperationsLock);
// Preprocess the options and context arg to decide the final the result for manager
SDWebImageOptionsResult *result = [self processedResultForURL:url options:options context:context];
// Start the entry to load image from cache
[self callCacheProcessForOperation:operation url:url options:result.options context:result.context progress:progressBlock completed:completedBlock];
return operation;
}
- (void)cancelAll {
SD_LOCK(_runningOperationsLock);
NSSet<SDWebImageCombinedOperation *> *copiedOperations = [self.runningOperations copy];
SD_UNLOCK(_runningOperationsLock);
[copiedOperations makeObjectsPerformSelector:@selector(cancel)]; // This will call `safelyRemoveOperationFromRunning:` and remove from the array
}
- (BOOL)isRunning {
BOOL isRunning = NO;
SD_LOCK(_runningOperationsLock);
isRunning = (self.runningOperations.count > 0);
SD_UNLOCK(_runningOperationsLock);
return isRunning;
}
- (void)removeFailedURL:(NSURL *)url {
if (!url) {
return;
}
SD_LOCK(_failedURLsLock);
[self.failedURLs removeObject:url];
SD_UNLOCK(_failedURLsLock);
}
- (void)removeAllFailedURLs {
SD_LOCK(_failedURLsLock);
[self.failedURLs removeAllObjects];
SD_UNLOCK(_failedURLsLock);
}
#pragma mark - Private
// Query normal cache process
- (void)callCacheProcessForOperation:(nonnull SDWebImageCombinedOperation *)operation
url:(nonnull NSURL *)url
options:(SDWebImageOptions)options
context:(nullable SDWebImageContext *)context
progress:(nullable SDImageLoaderProgressBlock)progressBlock
completed:(nullable SDInternalCompletionBlock)completedBlock {
// Grab the image cache to use
id<SDImageCache> imageCache;
if ([context[SDWebImageContextImageCache] conformsToProtocol:@protocol(SDImageCache)]) {
imageCache = context[SDWebImageContextImageCache];
} else {
imageCache = self.imageCache;
}
// Get the query cache type
SDImageCacheType queryCacheType = SDImageCacheTypeAll;
if (context[SDWebImageContextQueryCacheType]) {
queryCacheType = [context[SDWebImageContextQueryCacheType] integerValue];
}
// Check whether we should query cache
BOOL shouldQueryCache = !SD_OPTIONS_CONTAINS(options, SDWebImageFromLoaderOnly);
if (shouldQueryCache) {
NSString *key = [self cacheKeyForURL:url context:context];
@weakify(operation);
operation.cacheOperation = [imageCache queryImageForKey:key options:options context:context cacheType:queryCacheType completion:^(UIImage * _Nullable cachedImage, NSData * _Nullable cachedData, SDImageCacheType cacheType) {
@strongify(operation);
if (!operation || operation.isCancelled) {
// Image combined operation cancelled by user
[self callCompletionBlockForOperation:operation completion:completedBlock error:[NSError errorWithDomain:SDWebImageErrorDomain code:SDWebImageErrorCancelled userInfo:@{NSLocalizedDescriptionKey : @"Operation cancelled by user during querying the cache"}] url:url];
[self safelyRemoveOperationFromRunning:operation];
return;
} else if (context[SDWebImageContextImageTransformer] && !cachedImage) {
// Have a chance to query original cache instead of downloading
[self callOriginalCacheProcessForOperation:operation url:url options:options context:context progress:progressBlock completed:completedBlock];
return;
}
// Continue download process
[self callDownloadProcessForOperation:operation url:url options:options context:context cachedImage:cachedImage cachedData:cachedData cacheType:cacheType progress:progressBlock completed:completedBlock];
}];
} else {
// Continue download process
[self callDownloadProcessForOperation:operation url:url options:options context:context cachedImage:nil cachedData:nil cacheType:SDImageCacheTypeNone progress:progressBlock completed:completedBlock];
}
}
// Query original cache process
- (void)callOriginalCacheProcessForOperation:(nonnull SDWebImageCombinedOperation *)operation
url:(nonnull NSURL *)url
options:(SDWebImageOptions)options
context:(nullable SDWebImageContext *)context
progress:(nullable SDImageLoaderProgressBlock)progressBlock
completed:(nullable SDInternalCompletionBlock)completedBlock {
// Grab the image cache to use, choose standalone original cache firstly
id<SDImageCache> imageCache;
if ([context[SDWebImageContextOriginalImageCache] conformsToProtocol:@protocol(SDImageCache)]) {
imageCache = context[SDWebImageContextOriginalImageCache];
} else {
// if no standalone cache available, use default cache
if ([context[SDWebImageContextImageCache] conformsToProtocol:@protocol(SDImageCache)]) {
imageCache = context[SDWebImageContextImageCache];
} else {
imageCache = self.imageCache;
}
}
// Get the original query cache type
SDImageCacheType originalQueryCacheType = SDImageCacheTypeDisk;
if (context[SDWebImageContextOriginalQueryCacheType]) {
originalQueryCacheType = [context[SDWebImageContextOriginalQueryCacheType] integerValue];
}
// Check whether we should query original cache
BOOL shouldQueryOriginalCache = (originalQueryCacheType != SDImageCacheTypeNone);
if (shouldQueryOriginalCache) {
// Disable transformer for original cache key generation
SDWebImageMutableContext *tempContext = [context mutableCopy];
tempContext[SDWebImageContextImageTransformer] = [NSNull null];
NSString *key = [self cacheKeyForURL:url context:tempContext];
@weakify(operation);
operation.cacheOperation = [imageCache queryImageForKey:key options:options context:context cacheType:originalQueryCacheType completion:^(UIImage * _Nullable cachedImage, NSData * _Nullable cachedData, SDImageCacheType cacheType) {
@strongify(operation);
if (!operation || operation.isCancelled) {
// Image combined operation cancelled by user
[self callCompletionBlockForOperation:operation completion:completedBlock error:[NSError errorWithDomain:SDWebImageErrorDomain code:SDWebImageErrorCancelled userInfo:@{NSLocalizedDescriptionKey : @"Operation cancelled by user during querying the cache"}] url:url];
[self safelyRemoveOperationFromRunning:operation];
return;
}
// Use the store cache process instead of downloading, and ignore .refreshCached option for now
[self callStoreCacheProcessForOperation:operation url:url options:options context:context downloadedImage:cachedImage downloadedData:cachedData finished:YES progress:progressBlock completed:completedBlock];
[self safelyRemoveOperationFromRunning:operation];
}];
} else {
// Continue download process
[self callDownloadProcessForOperation:operation url:url options:options context:context cachedImage:nil cachedData:nil cacheType:originalQueryCacheType progress:progressBlock completed:completedBlock];
}
}
// Download process
- (void)callDownloadProcessForOperation:(nonnull SDWebImageCombinedOperation *)operation
url:(nonnull NSURL *)url
options:(SDWebImageOptions)options
context:(SDWebImageContext *)context
cachedImage:(nullable UIImage *)cachedImage
cachedData:(nullable NSData *)cachedData
cacheType:(SDImageCacheType)cacheType
progress:(nullable SDImageLoaderProgressBlock)progressBlock
completed:(nullable SDInternalCompletionBlock)completedBlock {
// Grab the image loader to use
id<SDImageLoader> imageLoader;
if ([context[SDWebImageContextImageLoader] conformsToProtocol:@protocol(SDImageLoader)]) {
imageLoader = context[SDWebImageContextImageLoader];
} else {
imageLoader = self.imageLoader;
}
// Check whether we should download image from network
BOOL shouldDownload = !SD_OPTIONS_CONTAINS(options, SDWebImageFromCacheOnly);
shouldDownload &= (!cachedImage || options & SDWebImageRefreshCached);
shouldDownload &= (![self.delegate respondsToSelector:@selector(imageManager:shouldDownloadImageForURL:)] || [self.delegate imageManager:self shouldDownloadImageForURL:url]);
if ([imageLoader respondsToSelector:@selector(canRequestImageForURL:options:context:)]) {
shouldDownload &= [imageLoader canRequestImageForURL:url options:options context:context];
} else {
shouldDownload &= [imageLoader canRequestImageForURL:url];
}
if (shouldDownload) {
if (cachedImage && options & SDWebImageRefreshCached) {
// If image was found in the cache but SDWebImageRefreshCached is provided, notify about the cached image
// AND try to re-download it in order to let a chance to NSURLCache to refresh it from server.
[self callCompletionBlockForOperation:operation completion:completedBlock image:cachedImage data:cachedData error:nil cacheType:cacheType finished:YES url:url];
// Pass the cached image to the image loader. The image loader should check whether the remote image is equal to the cached image.
SDWebImageMutableContext *mutableContext;
if (context) {
mutableContext = [context mutableCopy];
} else {
mutableContext = [NSMutableDictionary dictionary];
}
mutableContext[SDWebImageContextLoaderCachedImage] = cachedImage;
context = [mutableContext copy];
}
@weakify(operation);
operation.loaderOperation = [imageLoader requestImageWithURL:url options:options context:context progress:progressBlock completed:^(UIImage *downloadedImage, NSData *downloadedData, NSError *error, BOOL finished) {
@strongify(operation);
if (!operation || operation.isCancelled) {
// Image combined operation cancelled by user
[self callCompletionBlockForOperation:operation completion:completedBlock error:[NSError errorWithDomain:SDWebImageErrorDomain code:SDWebImageErrorCancelled userInfo:@{NSLocalizedDescriptionKey : @"Operation cancelled by user during sending the request"}] url:url];
} else if (cachedImage && options & SDWebImageRefreshCached && [error.domain isEqualToString:SDWebImageErrorDomain] && error.code == SDWebImageErrorCacheNotModified) {
// Image refresh hit the NSURLCache cache, do not call the completion block
} else if ([error.domain isEqualToString:SDWebImageErrorDomain] && error.code == SDWebImageErrorCancelled) {
// Download operation cancelled by user before sending the request, don't block failed URL
[self callCompletionBlockForOperation:operation completion:completedBlock error:error url:url];
} else if (error) {
[self callCompletionBlockForOperation:operation completion:completedBlock error:error url:url];
BOOL shouldBlockFailedURL = [self shouldBlockFailedURLWithURL:url error:error options:options context:context];
if (shouldBlockFailedURL) {
SD_LOCK(self->_failedURLsLock);
[self.failedURLs addObject:url];
SD_UNLOCK(self->_failedURLsLock);
}
} else {
if ((options & SDWebImageRetryFailed)) {
SD_LOCK(self->_failedURLsLock);
[self.failedURLs removeObject:url];
SD_UNLOCK(self->_failedURLsLock);
}
// Continue store cache process
[self callStoreCacheProcessForOperation:operation url:url options:options context:context downloadedImage:downloadedImage downloadedData:downloadedData finished:finished progress:progressBlock completed:completedBlock];
}
if (finished) {
[self safelyRemoveOperationFromRunning:operation];
}
}];
} else if (cachedImage) {
[self callCompletionBlockForOperation:operation completion:completedBlock image:cachedImage data:cachedData error:nil cacheType:cacheType finished:YES url:url];
[self safelyRemoveOperationFromRunning:operation];
} else {
// Image not in cache and download disallowed by delegate
[self callCompletionBlockForOperation:operation completion:completedBlock image:nil data:nil error:nil cacheType:SDImageCacheTypeNone finished:YES url:url];
[self safelyRemoveOperationFromRunning:operation];
}
}
// Store cache process
- (void)callStoreCacheProcessForOperation:(nonnull SDWebImageCombinedOperation *)operation
url:(nonnull NSURL *)url
options:(SDWebImageOptions)options
context:(SDWebImageContext *)context
downloadedImage:(nullable UIImage *)downloadedImage
downloadedData:(nullable NSData *)downloadedData
finished:(BOOL)finished
progress:(nullable SDImageLoaderProgressBlock)progressBlock
completed:(nullable SDInternalCompletionBlock)completedBlock {
// Grab the image cache to use, choose standalone original cache firstly
id<SDImageCache> imageCache;
if ([context[SDWebImageContextOriginalImageCache] conformsToProtocol:@protocol(SDImageCache)]) {
imageCache = context[SDWebImageContextOriginalImageCache];
} else {
// if no standalone cache available, use default cache
if ([context[SDWebImageContextImageCache] conformsToProtocol:@protocol(SDImageCache)]) {
imageCache = context[SDWebImageContextImageCache];
} else {
imageCache = self.imageCache;
}
}
// the target image store cache type
SDImageCacheType storeCacheType = SDImageCacheTypeAll;
if (context[SDWebImageContextStoreCacheType]) {
storeCacheType = [context[SDWebImageContextStoreCacheType] integerValue];
}
// the original store image cache type
SDImageCacheType originalStoreCacheType = SDImageCacheTypeDisk;
if (context[SDWebImageContextOriginalStoreCacheType]) {
originalStoreCacheType = [context[SDWebImageContextOriginalStoreCacheType] integerValue];
}
// Disable transformer for original cache key generation
SDWebImageMutableContext *tempContext = [context mutableCopy];
tempContext[SDWebImageContextImageTransformer] = [NSNull null];
NSString *key = [self cacheKeyForURL:url context:tempContext];
id<SDImageTransformer> transformer = context[SDWebImageContextImageTransformer];
if (![transformer conformsToProtocol:@protocol(SDImageTransformer)]) {
transformer = nil;
}
id<SDWebImageCacheSerializer> cacheSerializer = context[SDWebImageContextCacheSerializer];
BOOL shouldTransformImage = downloadedImage && transformer;
shouldTransformImage = shouldTransformImage && (!downloadedImage.sd_isAnimated || (options & SDWebImageTransformAnimatedImage));
shouldTransformImage = shouldTransformImage && (!downloadedImage.sd_isVector || (options & SDWebImageTransformVectorImage));
BOOL shouldCacheOriginal = downloadedImage && finished;
// if available, store original image to cache
if (shouldCacheOriginal) {
// normally use the store cache type, but if target image is transformed, use original store cache type instead
SDImageCacheType targetStoreCacheType = shouldTransformImage ? originalStoreCacheType : storeCacheType;
if (cacheSerializer && (targetStoreCacheType == SDImageCacheTypeDisk || targetStoreCacheType == SDImageCacheTypeAll)) {
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_HIGH, 0), ^{
@autoreleasepool {
NSData *cacheData = [cacheSerializer cacheDataWithImage:downloadedImage originalData:downloadedData imageURL:url];
[self storeImage:downloadedImage imageData:cacheData forKey:key imageCache:imageCache cacheType:targetStoreCacheType options:options context:context completion:^{
// Continue transform process
[self callTransformProcessForOperation:operation url:url options:options context:context originalImage:downloadedImage originalData:downloadedData finished:finished progress:progressBlock completed:completedBlock];
}];
}
});
} else {
[self storeImage:downloadedImage imageData:downloadedData forKey:key imageCache:imageCache cacheType:targetStoreCacheType options:options context:context completion:^{
// Continue transform process
[self callTransformProcessForOperation:operation url:url options:options context:context originalImage:downloadedImage originalData:downloadedData finished:finished progress:progressBlock completed:completedBlock];
}];
}
} else {
// Continue transform process
[self callTransformProcessForOperation:operation url:url options:options context:context originalImage:downloadedImage originalData:downloadedData finished:finished progress:progressBlock completed:completedBlock];
}
}
// Transform process
- (void)callTransformProcessForOperation:(nonnull SDWebImageCombinedOperation *)operation
url:(nonnull NSURL *)url
options:(SDWebImageOptions)options
context:(SDWebImageContext *)context
originalImage:(nullable UIImage *)originalImage
originalData:(nullable NSData *)originalData
finished:(BOOL)finished
progress:(nullable SDImageLoaderProgressBlock)progressBlock
completed:(nullable SDInternalCompletionBlock)completedBlock {
// Grab the image cache to use
id<SDImageCache> imageCache;
if ([context[SDWebImageContextImageCache] conformsToProtocol:@protocol(SDImageCache)]) {
imageCache = context[SDWebImageContextImageCache];
} else {
imageCache = self.imageCache;
}
// the target image store cache type
SDImageCacheType storeCacheType = SDImageCacheTypeAll;
if (context[SDWebImageContextStoreCacheType]) {
storeCacheType = [context[SDWebImageContextStoreCacheType] integerValue];
}
// transformed cache key
NSString *key = [self cacheKeyForURL:url context:context];
id<SDImageTransformer> transformer = context[SDWebImageContextImageTransformer];
if (![transformer conformsToProtocol:@protocol(SDImageTransformer)]) {
transformer = nil;
}
id<SDWebImageCacheSerializer> cacheSerializer = context[SDWebImageContextCacheSerializer];
BOOL shouldTransformImage = originalImage && transformer;
shouldTransformImage = shouldTransformImage && (!originalImage.sd_isAnimated || (options & SDWebImageTransformAnimatedImage));
shouldTransformImage = shouldTransformImage && (!originalImage.sd_isVector || (options & SDWebImageTransformVectorImage));
// if available, store transformed image to cache
if (shouldTransformImage) {
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_HIGH, 0), ^{
@autoreleasepool {
UIImage *transformedImage = [transformer transformedImageWithImage:originalImage forKey:key];
if (transformedImage && finished) {
BOOL imageWasTransformed = ![transformedImage isEqual:originalImage];
NSData *cacheData;
// pass nil if the image was transformed, so we can recalculate the data from the image
if (cacheSerializer && (storeCacheType == SDImageCacheTypeDisk || storeCacheType == SDImageCacheTypeAll)) {
cacheData = [cacheSerializer cacheDataWithImage:transformedImage originalData:(imageWasTransformed ? nil : originalData) imageURL:url];
} else {
cacheData = (imageWasTransformed ? nil : originalData);
}
[self storeImage:transformedImage imageData:cacheData forKey:key imageCache:imageCache cacheType:storeCacheType options:options context:context completion:^{
[self callCompletionBlockForOperation:operation completion:completedBlock image:transformedImage data:originalData error:nil cacheType:SDImageCacheTypeNone finished:finished url:url];
}];
} else {
[self callCompletionBlockForOperation:operation completion:completedBlock image:transformedImage data:originalData error:nil cacheType:SDImageCacheTypeNone finished:finished url:url];
}
}
});
} else {
[self callCompletionBlockForOperation:operation completion:completedBlock image:originalImage data:originalData error:nil cacheType:SDImageCacheTypeNone finished:finished url:url];
}
}
#pragma mark - Helper
- (void)safelyRemoveOperationFromRunning:(nullable SDWebImageCombinedOperation*)operation {
if (!operation) {
return;
}
SD_LOCK(_runningOperationsLock);
[self.runningOperations removeObject:operation];
SD_UNLOCK(_runningOperationsLock);
}
- (void)storeImage:(nullable UIImage *)image
imageData:(nullable NSData *)data
forKey:(nullable NSString *)key
imageCache:(nonnull id<SDImageCache>)imageCache
cacheType:(SDImageCacheType)cacheType
options:(SDWebImageOptions)options
context:(nullable SDWebImageContext *)context
completion:(nullable SDWebImageNoParamsBlock)completion {
BOOL waitStoreCache = SD_OPTIONS_CONTAINS(options, SDWebImageWaitStoreCache);
// Check whether we should wait the store cache finished. If not, callback immediately
[imageCache storeImage:image imageData:data forKey:key cacheType:cacheType completion:^{
if (waitStoreCache) {
if (completion) {
completion();
}
}
}];
if (!waitStoreCache) {
if (completion) {
completion();
}
}
}
- (void)callCompletionBlockForOperation:(nullable SDWebImageCombinedOperation*)operation
completion:(nullable SDInternalCompletionBlock)completionBlock
error:(nullable NSError *)error
url:(nullable NSURL *)url {
[self callCompletionBlockForOperation:operation completion:completionBlock image:nil data:nil error:error cacheType:SDImageCacheTypeNone finished:YES url:url];
}
- (void)callCompletionBlockForOperation:(nullable SDWebImageCombinedOperation*)operation
completion:(nullable SDInternalCompletionBlock)completionBlock
image:(nullable UIImage *)image
data:(nullable NSData *)data
error:(nullable NSError *)error
cacheType:(SDImageCacheType)cacheType
finished:(BOOL)finished
url:(nullable NSURL *)url {
dispatch_main_async_safe(^{
if (completionBlock) {
completionBlock(image, data, error, cacheType, finished, url);
}
});
}
- (BOOL)shouldBlockFailedURLWithURL:(nonnull NSURL *)url
error:(nonnull NSError *)error
options:(SDWebImageOptions)options
context:(nullable SDWebImageContext *)context {
id<SDImageLoader> imageLoader;
if ([context[SDWebImageContextImageLoader] conformsToProtocol:@protocol(SDImageLoader)]) {
imageLoader = context[SDWebImageContextImageLoader];
} else {
imageLoader = self.imageLoader;
}
// Check whether we should block failed url
BOOL shouldBlockFailedURL;
if ([self.delegate respondsToSelector:@selector(imageManager:shouldBlockFailedURL:withError:)]) {
shouldBlockFailedURL = [self.delegate imageManager:self shouldBlockFailedURL:url withError:error];
} else {
if ([imageLoader respondsToSelector:@selector(shouldBlockFailedURLWithURL:error:options:context:)]) {
shouldBlockFailedURL = [imageLoader shouldBlockFailedURLWithURL:url error:error options:options context:context];
} else {
shouldBlockFailedURL = [imageLoader shouldBlockFailedURLWithURL:url error:error];
}
}
return shouldBlockFailedURL;
}
- (SDWebImageOptionsResult *)processedResultForURL:(NSURL *)url options:(SDWebImageOptions)options context:(SDWebImageContext *)context {
SDWebImageOptionsResult *result;
SDWebImageMutableContext *mutableContext = [SDWebImageMutableContext dictionary];
// Image Transformer from manager
if (!context[SDWebImageContextImageTransformer]) {
id<SDImageTransformer> transformer = self.transformer;
[mutableContext setValue:transformer forKey:SDWebImageContextImageTransformer];
}
// Cache key filter from manager
if (!context[SDWebImageContextCacheKeyFilter]) {
id<SDWebImageCacheKeyFilter> cacheKeyFilter = self.cacheKeyFilter;
[mutableContext setValue:cacheKeyFilter forKey:SDWebImageContextCacheKeyFilter];
}
// Cache serializer from manager
if (!context[SDWebImageContextCacheSerializer]) {
id<SDWebImageCacheSerializer> cacheSerializer = self.cacheSerializer;
[mutableContext setValue:cacheSerializer forKey:SDWebImageContextCacheSerializer];
}
if (mutableContext.count > 0) {
if (context) {
[mutableContext addEntriesFromDictionary:context];
}
context = [mutableContext copy];
}
// Apply options processor
if (self.optionsProcessor) {
result = [self.optionsProcessor processedResultForURL:url options:options context:context];
}
if (!result) {
// Use default options result
result = [[SDWebImageOptionsResult alloc] initWithOptions:options context:context];
}
return result;
}
@end
@implementation SDWebImageCombinedOperation
- (void)cancel {
@synchronized(self) {
if (self.isCancelled) {
return;
}
self.cancelled = YES;
if (self.cacheOperation) {
[self.cacheOperation cancel];
self.cacheOperation = nil;
}
if (self.loaderOperation) {
[self.loaderOperation cancel];
self.loaderOperation = nil;
}
[self.manager safelyRemoveOperationFromRunning:self];
}
}
@end