87 lines
2.1 KiB
Objective-C
87 lines
2.1 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 "RCTShadowVirtualImage.h"
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#import "RCTImageLoader.h"
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#import "RCTImageUtils.h"
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#import "RCTBridge.h"
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#import "RCTConvert.h"
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#import "RCTUIManager.h"
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#import "RCTUtils.h"
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@implementation RCTShadowVirtualImage
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{
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RCTBridge *_bridge;
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RCTImageLoaderCancellationBlock _cancellationBlock;
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}
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@synthesize image = _image;
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- (instancetype)initWithBridge:(RCTBridge *)bridge
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{
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if ((self = [super init])) {
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_bridge = bridge;
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}
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return self;
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}
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RCT_NOT_IMPLEMENTED(-(instancetype)init)
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- (void)didSetProps:(NSArray<NSString *> *)changedProps
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{
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[super didSetProps:changedProps];
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if (changedProps.count == 0) {
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// No need to reload image
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return;
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}
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// Cancel previous request
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if (_cancellationBlock) {
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_cancellationBlock();
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}
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CGSize imageSize = {
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RCTZeroIfNaN(self.width),
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RCTZeroIfNaN(self.height),
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};
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if (!_image) {
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_image = RCTGetPlaceholderImage(imageSize, nil);
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}
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__weak RCTShadowVirtualImage *weakSelf = self;
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_cancellationBlock = [_bridge.imageLoader loadImageWithTag:_source.imageURL.absoluteString
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size:imageSize
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scale:RCTScreenScale()
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resizeMode:_resizeMode
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progressBlock:nil
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completionBlock:^(NSError *error, UIImage *image) {
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dispatch_async(_bridge.uiManager.methodQueue, ^{
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RCTShadowVirtualImage *strongSelf = weakSelf;
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if (![_source isEqual:strongSelf.source]) {
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// Bail out if source has changed since we started loading
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return;
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}
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strongSelf->_image = image;
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[strongSelf dirtyText];
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});
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}];
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}
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- (void)dealloc
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{
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if (_cancellationBlock) {
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_cancellationBlock();
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}
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}
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@end
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