// // MWPhoto.m // MWPhotoBrowser // // Created by Michael Waterfall on 17/10/2010. // Copyright 2010 d3i. All rights reserved. // #import "MWPhoto.h" #import "MWPhotoBrowser.h" #import "EMSDWebImageDecoder.h" #import "EMSDWebImageManager.h" #import "EMSDWebImageOperation.h" #import @interface MWPhoto () { BOOL _loadingInProgress; id _webImageOperation; } - (void)imageLoadingComplete; @end @implementation MWPhoto @synthesize underlyingImage = _underlyingImage; // synth property from protocol #pragma mark - Class Methods + (MWPhoto *)photoWithImage:(UIImage *)image { return [[MWPhoto alloc] initWithImage:image]; } // Deprecated + (MWPhoto *)photoWithFilePath:(NSString *)path { return [MWPhoto photoWithURL:[NSURL fileURLWithPath:path]]; } + (MWPhoto *)photoWithURL:(NSURL *)url { return [[MWPhoto alloc] initWithURL:url]; } #pragma mark - Init - (id)initWithImage:(UIImage *)image { if ((self = [super init])) { _image = image; } return self; } // Deprecated - (id)initWithFilePath:(NSString *)path { if ((self = [super init])) { _photoURL = [NSURL fileURLWithPath:path]; } return self; } - (id)initWithURL:(NSURL *)url { if ((self = [super init])) { _photoURL = [url copy]; } return self; } #pragma mark - MWPhoto Protocol Methods - (UIImage *)underlyingImage { return _underlyingImage; } - (void)loadUnderlyingImageAndNotify { // NSAssert([[NSThread currentThread] isMainThread], @"This method must be called on the main thread."); if (_loadingInProgress) return; _loadingInProgress = YES; @try { if (self.underlyingImage) { [self imageLoadingComplete]; } else { [self performLoadUnderlyingImageAndNotify]; } } @catch (NSException *exception) { self.underlyingImage = nil; _loadingInProgress = NO; [self imageLoadingComplete]; } @finally { } } // Set the underlyingImage - (void)performLoadUnderlyingImageAndNotify { // Get underlying image if (_image) { // We have UIImage! self.underlyingImage = _image; [self imageLoadingComplete]; } else if (_photoURL) { // Check what type of url it is if ([[[_photoURL scheme] lowercaseString] isEqualToString:@"assets-library"]) { // Load from asset library async dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{ @autoreleasepool { @try { ALAssetsLibrary *assetslibrary = [[ALAssetsLibrary alloc] init]; [assetslibrary assetForURL:self->_photoURL resultBlock:^(ALAsset *asset){ ALAssetRepresentation *rep = [asset defaultRepresentation]; CGImageRef iref = [rep fullScreenImage]; if (iref) { self.underlyingImage = [UIImage imageWithCGImage:iref]; } [self performSelectorOnMainThread:@selector(imageLoadingComplete) withObject:nil waitUntilDone:NO]; } failureBlock:^(NSError *error) { self.underlyingImage = nil; MWLog(@"Photo from asset library error: %@",error); [self performSelectorOnMainThread:@selector(imageLoadingComplete) withObject:nil waitUntilDone:NO]; }]; } @catch (NSException *e) { MWLog(@"Photo from asset library error: %@", e); [self performSelectorOnMainThread:@selector(imageLoadingComplete) withObject:nil waitUntilDone:NO]; } } }); } else if ([_photoURL isFileReferenceURL]) { // Load from local file async dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{ @autoreleasepool { @try { self.underlyingImage = [UIImage imageWithContentsOfFile:self->_photoURL.path]; if (!self->_underlyingImage) { MWLog(@"Error loading photo from path: %@", _photoURL.path); } } @finally { [self performSelectorOnMainThread:@selector(imageLoadingComplete) withObject:nil waitUntilDone:NO]; } } }); } else { // Load async from web (using SDWebImage) @try { EMSDWebImageManager *manager = [EMSDWebImageManager sharedManager]; _webImageOperation = [manager downloadImageWithURL:_photoURL options:0 progress:^(NSInteger receivedSize, NSInteger expectedSize) { if (expectedSize > 0) { float progress = receivedSize / (float)expectedSize; NSDictionary* dict = [NSDictionary dictionaryWithObjectsAndKeys: [NSNumber numberWithFloat:progress], @"progress", self, @"photo", nil]; [[NSNotificationCenter defaultCenter] postNotificationName:MWPHOTO_PROGRESS_NOTIFICATION object:dict]; } } completed:^(UIImage *image, NSError *error, EMSDImageCacheType cacheType, BOOL finished, NSURL *imageURL) { if (error) { MWLog(@"SDWebImage failed to download image: %@", error); } self->_webImageOperation = nil; self.underlyingImage = image; [self imageLoadingComplete]; }]; } @catch (NSException *e) { MWLog(@"Photo from web: %@", e); _webImageOperation = nil; [self imageLoadingComplete]; } } } else { // Failed - no source @throw [NSException exceptionWithName:@"" reason:nil userInfo:nil]; } } // Release if we can get it again from path or url - (void)unloadUnderlyingImage { _loadingInProgress = NO; self.underlyingImage = nil; } - (void)imageLoadingComplete { // NSAssert([[NSThread currentThread] isMainThread], @"This method must be called on the main thread."); // Complete so notify _loadingInProgress = NO; // Notify on next run loop [self performSelector:@selector(postCompleteNotification) withObject:nil afterDelay:0]; } - (void)postCompleteNotification { [[NSNotificationCenter defaultCenter] postNotificationName:MWPHOTO_LOADING_DID_END_NOTIFICATION object:self]; } - (void)cancelAnyLoading { if (_webImageOperation) { [_webImageOperation cancel]; _loadingInProgress = NO; } } @end