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Jwoo/ios custom background image loader (#1642)
* fixes url loading sync issue for actions removed hard coded image icon placement * allows custom BG IMG renderer * Added CustomImageRenderer to sample * removed CoreGraphics framework as it's not used
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source/ios/AdaptiveCards/ADCIOSVisualizer/ADCIOSVisualizer/CustomImageRenderer.h
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| Original file line number | Diff line number | Diff line change |
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| // | ||
| // CustomImageRenderer.h | ||
| // ADCIOSVisualizer | ||
| // | ||
| // Copyright © 2018 Microsoft. All rights reserved. | ||
| // | ||
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| #import <Foundation/Foundation.h> | ||
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| #import <AdaptiveCards/ACFramework.h> | ||
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| @interface CustomImageRenderer:ACRBaseCardElementRenderer | ||
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| + (CustomImageRenderer *)getInstance; | ||
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| @end |
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source/ios/AdaptiveCards/ADCIOSVisualizer/ADCIOSVisualizer/CustomImageRenderer.mm
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| // | ||
| // CustomImageRenderer | ||
| // CustomImageRenderer.mm | ||
| // | ||
| // Copyright © 2018 Microsoft. All rights reserved. | ||
| // | ||
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| #import "CustomImageRenderer.h" | ||
| #import <AdaptiveCards/ACFramework.h> | ||
| #import <AdaptiveCards/SharedAdaptiveCard.h> | ||
| #import <AdaptiveCards/TextBlock.h> | ||
| #import <AdaptiveCards/ACRTextBlockRenderer.h> | ||
| #import <AdaptiveCards/ACOBaseCardElementPrivate.h> | ||
| #import <AdaptiveCards/ACRContentHoldingUIView.h> | ||
| #import <AdaptiveCards/MarkDownParser.h> | ||
| #import <AdaptiveCards/HostConfig.h> | ||
| #import <AdaptiveCards/ACOHostConfigPrivate.h> | ||
| #import <AdaptiveCards/ACRUIImageView.h> | ||
| #import <AdaptiveCards/Image.h> | ||
| #import <AdaptiveCards/ACRLongPressGestureRecognizerFactory.h> | ||
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| @implementation CustomImageRenderer | ||
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| + (CustomImageRenderer *)getInstance | ||
| { | ||
| static CustomImageRenderer *singletonInstance = [[self alloc] init]; | ||
| return singletonInstance; | ||
| } | ||
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| - (UIView *)render:(UIView<ACRIContentHoldingView> *)viewGroup | ||
| rootView:(ACRView *)rootView | ||
| inputs:(NSArray *)inputs | ||
| baseCardElement:(ACOBaseCardElement *)acoElem | ||
| hostConfig:(ACOHostConfig *)acoConfig | ||
| { | ||
| std::shared_ptr<BaseCardElement> elem = [acoElem element]; | ||
| std::shared_ptr<Image> imgElem = std::dynamic_pointer_cast<Image>(elem); | ||
| ACRUIImageView *view; | ||
| NSInteger pixelWidth = imgElem->GetPixelWidth(), pixelHeight = imgElem->GetPixelHeight(); | ||
| BOOL hasExplicitMeasurements = (pixelWidth || pixelHeight); | ||
| BOOL isAspectRatioNeeded = !(pixelWidth && pixelHeight); | ||
| CGSize cgsize = [acoConfig getImageSize:imgElem->GetImageSize()]; | ||
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| NSString *urlStr = [NSString stringWithCString:imgElem->GetUrl().c_str() | ||
| encoding:[NSString defaultCStringEncoding]]; | ||
| NSURL *nsurl = [NSURL URLWithString:urlStr]; | ||
| // download image | ||
| UIImage *img = [UIImage imageWithData:[NSData dataWithContentsOfURL:nsurl]]; | ||
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| CGFloat heightToWidthRatio = 0.0f, widthToHeightRatio = 0.0f; | ||
| if(img){ | ||
| if(img.size.width > 0) { | ||
| heightToWidthRatio = img.size.height / img.size.width; | ||
| } | ||
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| if(img.size.height > 0) { | ||
| widthToHeightRatio =img.size.width / img.size.height; | ||
| } | ||
| } | ||
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| if(hasExplicitMeasurements) { | ||
| if(pixelWidth){ | ||
| cgsize.width = pixelWidth; | ||
| if(isAspectRatioNeeded) { | ||
| cgsize.height = pixelWidth * heightToWidthRatio; | ||
| } | ||
| } | ||
| if(pixelHeight){ | ||
| cgsize.height = pixelHeight; | ||
| if(isAspectRatioNeeded) { | ||
| cgsize.width = pixelHeight * widthToHeightRatio; | ||
| } | ||
| } | ||
| } | ||
| view = [[ACRUIImageView alloc] initWithFrame:CGRectMake(0, 0, cgsize.width, cgsize.height)]; | ||
| view.image = img; | ||
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| ImageSize size = ImageSize::None; | ||
| if (!hasExplicitMeasurements){ | ||
| size = imgElem->GetImageSize(); | ||
| if (size == ImageSize::None) { | ||
| size = [acoConfig getHostConfig]->image.imageSize; | ||
| } | ||
| } | ||
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| if(size != ImageSize::Auto && size != ImageSize::Stretch){ | ||
| [view addConstraints:@[[NSLayoutConstraint constraintWithItem:view | ||
| attribute:NSLayoutAttributeWidth | ||
| relatedBy:NSLayoutRelationEqual | ||
| toItem:nil | ||
| attribute:NSLayoutAttributeNotAnAttribute | ||
| multiplier:1.0 | ||
| constant:cgsize.width], | ||
| [NSLayoutConstraint constraintWithItem:view | ||
| attribute:NSLayoutAttributeHeight | ||
| relatedBy:NSLayoutRelationEqual | ||
| toItem:nil | ||
| attribute:NSLayoutAttributeNotAnAttribute | ||
| multiplier:1.0 | ||
| constant:cgsize.height]]]; | ||
| } | ||
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| if(heightToWidthRatio && widthToHeightRatio && (size == ImageSize::Auto || size == ImageSize::Stretch)){ | ||
| [view addConstraints:@[[NSLayoutConstraint constraintWithItem:view | ||
| attribute:NSLayoutAttributeHeight | ||
| relatedBy:NSLayoutRelationEqual | ||
| toItem:view | ||
| attribute:NSLayoutAttributeWidth | ||
| multiplier:heightToWidthRatio | ||
| constant:0]]]; | ||
| [view addConstraints:@[[NSLayoutConstraint constraintWithItem:view | ||
| attribute:NSLayoutAttributeWidth | ||
| relatedBy:NSLayoutRelationEqual | ||
| toItem:view | ||
| attribute:NSLayoutAttributeHeight | ||
| multiplier:widthToHeightRatio | ||
| constant:0]]]; | ||
| } | ||
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| if(!isAspectRatioNeeded){ | ||
| view.contentMode = UIViewContentModeScaleToFill; | ||
| } else { | ||
| view.contentMode = UIViewContentModeScaleAspectFit; | ||
| } | ||
| view.clipsToBounds = NO; | ||
| if(imgElem->GetImageStyle() == ImageStyle::Person) { | ||
| CALayer *imgLayer = view.layer; | ||
| [imgLayer setCornerRadius:cgsize.width/2]; | ||
| [imgLayer setMasksToBounds:YES]; | ||
| } | ||
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| ACRContentHoldingUIView *wrappingview = [[ACRContentHoldingUIView alloc] initWithFrame:view.frame]; | ||
| [wrappingview addSubview:view]; | ||
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| [viewGroup addArrangedSubview:wrappingview]; | ||
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| [wrappingview addConstraints:[ACOHostConfig getConstraintsForImageAlignment:imgElem->GetHorizontalAlignment() | ||
| withSuperview:wrappingview | ||
| toView:view]]; | ||
| // ImageSize::Auto should maintain its intrinsic size | ||
| if(size == ImageSize::Auto || size == ImageSize::Stretch) { | ||
| NSArray<NSString *> *visualFormats = [NSArray arrayWithObjects:@"H:[view(<=wrappingview)]", @"V:|-[view(<=wrappingview)]-|", nil]; | ||
| NSDictionary *viewMap = NSDictionaryOfVariableBindings(view, wrappingview); | ||
| for(NSString *constraint in visualFormats){ | ||
| [NSLayoutConstraint activateConstraints:[NSLayoutConstraint constraintsWithVisualFormat:constraint options:0 metrics:nil views:viewMap]]; | ||
| } | ||
| } else { | ||
| [wrappingview setContentCompressionResistancePriority:UILayoutPriorityRequired forAxis:UILayoutConstraintAxisHorizontal]; | ||
| [wrappingview setContentCompressionResistancePriority:UILayoutPriorityRequired forAxis:UILayoutConstraintAxisVertical]; | ||
| } | ||
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| if(size == ImageSize::Auto) { | ||
| [view setContentHuggingPriority:UILayoutPriorityRequired forAxis:UILayoutConstraintAxisHorizontal]; | ||
| [view setContentHuggingPriority:UILayoutPriorityRequired forAxis:UILayoutConstraintAxisVertical]; | ||
| [wrappingview setContentHuggingPriority:UILayoutPriorityRequired forAxis:UILayoutConstraintAxisHorizontal]; | ||
| [wrappingview setContentHuggingPriority:UILayoutPriorityRequired forAxis:UILayoutConstraintAxisVertical]; | ||
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| if(imgElem->GetHeight() == HeightType::Stretch) { | ||
| UIView *blankTrailingSpace = [[UIView alloc] init]; | ||
| [blankTrailingSpace setContentHuggingPriority:(UILayoutPriorityDefaultLow) forAxis:UILayoutConstraintAxisVertical]; | ||
| [viewGroup addArrangedSubview:blankTrailingSpace]; | ||
| } | ||
| } | ||
| std::shared_ptr<BaseActionElement> selectAction = imgElem->GetSelectAction(); | ||
| // instantiate and add tap gesture recognizer | ||
| UILongPressGestureRecognizer * gestureRecognizer = | ||
| [ACRLongPressGestureRecognizerFactory getLongPressGestureRecognizer:viewGroup | ||
| rootView:rootView | ||
| targetView:wrappingview | ||
| actionElement:selectAction | ||
| inputs:inputs | ||
| hostConfig:acoConfig]; | ||
| if(gestureRecognizer) { | ||
| [view addGestureRecognizer:gestureRecognizer]; | ||
| view.userInteractionEnabled = YES; | ||
| } | ||
| view.translatesAutoresizingMaskIntoConstraints = NO; | ||
| wrappingview.translatesAutoresizingMaskIntoConstraints = NO; | ||
| return wrappingview; | ||
| } | ||
|
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| @end |
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