diff options
Diffstat (limited to 'Xamarin.Forms.Platform.MacOS/ImageSourceHandlers.cs')
-rw-r--r-- | Xamarin.Forms.Platform.MacOS/ImageSourceHandlers.cs | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/Xamarin.Forms.Platform.MacOS/ImageSourceHandlers.cs b/Xamarin.Forms.Platform.MacOS/ImageSourceHandlers.cs new file mode 100644 index 00000000..7a73ace4 --- /dev/null +++ b/Xamarin.Forms.Platform.MacOS/ImageSourceHandlers.cs @@ -0,0 +1,64 @@ +using System.IO; +using System.Threading; +using System.Threading.Tasks; +using AppKit; + +namespace Xamarin.Forms.Platform.MacOS +{ + public interface IImageSourceHandler : IRegisterable + { + Task<NSImage> LoadImageAsync(ImageSource imagesource, CancellationToken cancelationToken = default(CancellationToken), + float scale = 1); + } + + public sealed class FileImageSourceHandler : IImageSourceHandler + { + public Task<NSImage> LoadImageAsync(ImageSource imagesource, + CancellationToken cancelationToken = default(CancellationToken), float scale = 1f) + { + NSImage image = null; + var filesource = imagesource as FileImageSource; + var file = filesource?.File; + if (!string.IsNullOrEmpty(file)) + image = File.Exists(file) ? new NSImage(file) : null; + return Task.FromResult(image); + } + } + + public sealed class StreamImagesourceHandler : IImageSourceHandler + { + public async Task<NSImage> LoadImageAsync(ImageSource imagesource, + CancellationToken cancelationToken = default(CancellationToken), float scale = 1f) + { + NSImage image = null; + var streamsource = imagesource as StreamImageSource; + if (streamsource?.Stream == null) return null; + using ( + var streamImage = await ((IStreamImageSource)streamsource).GetStreamAsync(cancelationToken).ConfigureAwait(false)) + { + if (streamImage != null) + image = NSImage.FromStream(streamImage); + } + return image; + } + } + + public sealed class ImageLoaderSourceHandler : IImageSourceHandler + { + public async Task<NSImage> LoadImageAsync(ImageSource imagesource, + CancellationToken cancelationToken = default(CancellationToken), float scale = 1f) + { + NSImage image = null; + var imageLoader = imagesource as UriImageSource; + if (imageLoader != null && imageLoader.Uri != null) + { + using (var streamImage = await imageLoader.GetStreamAsync(cancelationToken).ConfigureAwait(false)) + { + if (streamImage != null) + image = NSImage.FromStream(streamImage); + } + } + return image; + } + } +}
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