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Build ChatListUI
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Ali
329
submodules/LegacyComponents/Sources/TGImageView.m
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329
submodules/LegacyComponents/Sources/TGImageView.m
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#import "TGImageView.h"
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#import "LegacyComponentsInternal.h"
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#import <LegacyComponents/TGImageManager.h>
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#import <LegacyComponents/UIImage+TG.h>
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NSString *TGImageViewOptionKeepCurrentImageAsPlaceholder = @"TGImageViewOptionKeepCurrentImageAsPlaceholder";
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NSString *TGImageViewOptionEmbeddedImage = @"TGImageViewOptionEmbeddedImage";
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NSString *TGImageViewOptionSynchronous = @"TGImageViewOptionSynchronous";
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@interface TGImageView ()
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{
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id _loadToken;
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volatile int _version;
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SMetaDisposable *_disposable;
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UIImageView *_transitionOverlayView;
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}
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@end
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@implementation TGImageView
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- (instancetype)initWithFrame:(CGRect)frame
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{
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self = [super initWithFrame:frame];
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if (self != nil)
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{
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_disposable = [[SMetaDisposable alloc] init];
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_legacyAutomaticProgress = true;
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}
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return self;
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}
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- (void)dealloc
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{
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[_disposable dispose];
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if (_loadToken != nil)
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[[TGImageManager instance] cancelTaskWithId:_loadToken];
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}
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- (void)setExpectExtendedEdges:(bool)expectExtendedEdges
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{
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if (_expectExtendedEdges != expectExtendedEdges)
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{
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_expectExtendedEdges = expectExtendedEdges;
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if (_expectExtendedEdges && _extendedInsetsImageView == nil)
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{
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self.image = nil;
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_extendedInsetsImageView = [[UIImageView alloc] init];
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[self addSubview:_extendedInsetsImageView];
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}
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else if (!_expectExtendedEdges && _extendedInsetsImageView != nil)
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{
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_extendedInsetsImageView.image = nil;
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[_extendedInsetsImageView removeFromSuperview];
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_extendedInsetsImageView = nil;
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}
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}
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}
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- (void)loadUri:(NSString *)uri withOptions:(NSDictionary *)__unused options
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{
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[_disposable setDisposable:nil];
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_version++;
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UIImage *image = nil;
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bool beganAsyncTask = false;
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if (options[TGImageViewOptionEmbeddedImage] != nil)
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image = options[TGImageViewOptionEmbeddedImage];
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else
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{
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__autoreleasing id asyncTaskId = nil;
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__weak TGImageView *weakSelf = self;
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int version = _version;
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CFAbsoluteTime loadStartTime = CACurrentMediaTime();
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bool legacyAutomaticProgress = _legacyAutomaticProgress;
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image = [[TGImageManager instance] loadImageSyncWithUri:uri canWait:[options[TGImageViewOptionSynchronous] boolValue] decode:true acceptPartialData:true asyncTaskId:&asyncTaskId progress:^(float value)
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{
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if (legacyAutomaticProgress)
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{
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TGDispatchOnMainThread(^
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{
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__strong TGImageView *strongSelf = weakSelf;
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if (strongSelf != nil && strongSelf->_version == version)
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[strongSelf _updateProgress:value];
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});
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}
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} partialCompletion:^(UIImage *partialImage)
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{
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TGDispatchOnMainThread(^
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{
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__strong TGImageView *strongSelf = weakSelf;
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if (strongSelf != nil && strongSelf->_version == version)
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[strongSelf _commitImage:partialImage partial:true loadTime:(NSTimeInterval)(CACurrentMediaTime() - loadStartTime)];
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else
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TGLegacyLog(@"[TGImageView _commitImage version mismatch]");
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});
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} completion:^(UIImage *image)
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{
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TGDispatchOnMainThread(^
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{
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__strong TGImageView *strongSelf = weakSelf;
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if (strongSelf != nil && strongSelf->_version == version)
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{
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if (legacyAutomaticProgress)
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[strongSelf _updateProgress:1.0f];
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[strongSelf _commitImage:image partial:false loadTime:(NSTimeInterval)(CACurrentMediaTime() - loadStartTime)];
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}
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else
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TGLegacyLog(@"[TGImageView _commitImage version mismatch]");
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});
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}];
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if (asyncTaskId != nil)
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{
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beganAsyncTask = true;
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_loadToken = asyncTaskId;
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}
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}
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if (image != nil)
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[self _commitImage:image partial:beganAsyncTask loadTime:0.0];
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else
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{
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if (![options[TGImageViewOptionKeepCurrentImageAsPlaceholder] boolValue])
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{
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UIImage *placeholderImage = [[TGImageManager instance] loadAttributeSyncForUri:uri attribute:@"placeholder"];
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if (placeholderImage != nil)
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[self _commitImage:placeholderImage partial:beganAsyncTask loadTime:0.0];
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else
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[self performTransitionToImage:nil partial:true duration:0.0];
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}
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CFAbsoluteTime loadStartTime = CACurrentMediaTime();
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__weak TGImageView *weakSelf = self;
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int version = _version;
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bool legacyAutomaticProgress = _legacyAutomaticProgress;
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_loadToken = [[TGImageManager instance] beginLoadingImageAsyncWithUri:uri decode:true progress:^(float value)
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{
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if (legacyAutomaticProgress)
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{
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TGDispatchOnMainThread(^
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{
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__strong TGImageView *strongSelf = weakSelf;
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if (strongSelf != nil && strongSelf->_version == version)
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[strongSelf _updateProgress:value];
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});
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}
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} partialCompletion:^(UIImage *partialImage)
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{
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TGDispatchOnMainThread(^
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{
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__strong TGImageView *strongSelf = weakSelf;
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if (strongSelf != nil && strongSelf->_version == version)
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[strongSelf _commitImage:partialImage partial:true loadTime:(NSTimeInterval)(CACurrentMediaTime() - loadStartTime)];
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else
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TGLegacyLog(@"[TGImageView _commitImage version mismatch]");
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});
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} completion:^(UIImage *image)
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{
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TGDispatchOnMainThread(^
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{
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__strong TGImageView *strongSelf = weakSelf;
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if (strongSelf != nil && strongSelf->_version == version)
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{
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if (legacyAutomaticProgress)
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[strongSelf _updateProgress:1.0f];
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[strongSelf _commitImage:image partial:false loadTime:(NSTimeInterval)(CACurrentMediaTime() - loadStartTime)];
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}
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else
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TGLegacyLog(@"[TGImageView _commitImage version mismatch]");
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});
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}];
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}
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}
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- (void)_updateProgress:(float)value
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{
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[self performProgressUpdate:value];
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}
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- (void)_commitImage:(UIImage *)image partial:(bool)partial loadTime:(NSTimeInterval)loadTime
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{
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if (image == self.image)
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return;
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NSTimeInterval transitionDuration = 0.0;
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if (loadTime > DBL_EPSILON)
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transitionDuration = 0.16;
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[self performTransitionToImage:image partial:partial duration:transitionDuration];
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}
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- (void)reset
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{
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_version++;
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[_disposable setDisposable:nil];
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if (_loadToken != nil)
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{
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[[TGImageManager instance] cancelTaskWithId:_loadToken];
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_loadToken = nil;
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}
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[self _commitImage:nil partial:false loadTime:0.0];
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}
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- (UIImage *)currentImage
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{
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if (_expectExtendedEdges)
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return _extendedInsetsImageView.image;
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return [super image];
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}
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- (void)performProgressUpdate:(CGFloat)__unused progress
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{
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}
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- (void)performTransitionToImage:(UIImage *)image partial:(bool)__unused partial duration:(NSTimeInterval)duration
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{
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if (((_expectExtendedEdges && _extendedInsetsImageView.image != nil) || (!_expectExtendedEdges && self.image != nil)) && duration > DBL_EPSILON)
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{
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self.alpha = 1.0f;
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_extendedInsetsImageView.alpha = 1.0f;
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if (_transitionOverlayView == nil)
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_transitionOverlayView = [[UIImageView alloc] init];
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_transitionOverlayView.frame = _extendedInsetsImageView == nil ? self.bounds : _extendedInsetsImageView.frame;
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_transitionOverlayView.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
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[self insertSubview:_transitionOverlayView atIndex:0];
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_transitionOverlayView.image = _extendedInsetsImageView == nil ? self.image : _extendedInsetsImageView.image;
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_transitionOverlayView.backgroundColor = self.backgroundColor;
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_transitionOverlayView.alpha = 1.0;
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[UIView animateWithDuration:duration animations:^
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{
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_transitionOverlayView.alpha = 0.0;
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} completion:^(__unused BOOL finished)
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{
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_transitionOverlayView.image = nil;
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[_transitionOverlayView removeFromSuperview];
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}];
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if (_extendedInsetsImageView != nil)
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{
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_extendedInsetsImageView.alpha = 0.0f;
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[UIView animateWithDuration:duration / 2.0f animations:^
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{
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_extendedInsetsImageView.alpha = 1.0f;
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}];
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}
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}
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else if (image != nil && duration > DBL_EPSILON)
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{
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if (_expectExtendedEdges)
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_extendedInsetsImageView.alpha = 0.0f;
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else
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self.alpha = 0.0f;
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[UIView animateWithDuration:duration animations:^
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{
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if (_expectExtendedEdges)
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_extendedInsetsImageView.alpha = 1.0f;
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else
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self.alpha = 1.0f;
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} completion:^(__unused BOOL finished)
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{
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}];
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}
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else
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{
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self.alpha = 1.0f;
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}
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if (!_expectExtendedEdges)
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{
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self.image = image;
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if (_extendedInsetsImageView != nil)
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{
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[_extendedInsetsImageView removeFromSuperview];
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_extendedInsetsImageView = nil;
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}
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}
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else
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{
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UIEdgeInsets insets = [image extendedEdgeInsets];
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_extendedInsetsImageView.image = image;
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_extendedInsetsImageView.frame = CGRectMake(-insets.left, -insets.top, self.bounds.size.width + insets.left + insets.right, self.bounds.size.height + insets.top + insets.bottom);
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}
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}
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- (void)setSignal:(SSignal *)signal
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{
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_version++;
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int version = _version;
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__weak TGImageView *weakSelf = self;
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[_disposable setDisposable:[signal startWithNext:^(id next)
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{
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bool synchronous = [NSThread isMainThread];
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TGDispatchOnMainThread(^
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{
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__strong TGImageView *strongSelf = weakSelf;
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if (strongSelf != nil && strongSelf->_version == version)
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{
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if ([next isKindOfClass:[UIImage class]])
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[strongSelf _commitImage:next partial:[next degraded] && ![next edited] loadTime:synchronous ? 0.0 : 1.0];
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else if ([next respondsToSelector:@selector(floatValue)])
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[strongSelf _updateProgress:[next floatValue]];
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}
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});
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} error:^(id error)
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{
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TGLegacyLog(@"TGImageView signal error: %@", error);
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} completed:^
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{
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}]];
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}
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@end
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