private static string GetScaledPath(string path, HashSet <string> assets, ResolutionScale?scaleOverride)
{
if (!string.IsNullOrEmpty(path))
{
var directory = Path.GetDirectoryName(path);
var filename = Path.GetFileNameWithoutExtension(path);
var extension = Path.GetExtension(path);
var resolutionScale = scaleOverride == null ? (int)DisplayInformation.GetForCurrentView().ResolutionScale : (int)scaleOverride;
for (var i = KnownScales.Length - 1; i >= 0; i--)
{
var probeScale = KnownScales[i];
if (resolutionScale >= probeScale)
{
var filePath = Path.Combine(directory, $"{filename}.scale-{probeScale}{extension}");
if (assets.Contains(filePath))
{
return(AssetsPathBuilder.BuildAssetUri(filePath));
}
}
}
return(AssetsPathBuilder.BuildAssetUri(path));
}
return(path);
}
private static async Task <HashSet <string> > GetAssets()
{
var assetsUri = AssetsPathBuilder.BuildAssetUri("uno-assets.txt");
var assets = await WebAssemblyRuntime.InvokeAsync($"fetch('{assetsUri}').then(r => r.text())");
return(new HashSet <string>(Regex.Split(assets, "\r\n|\r|\n")));
}
private protected override bool TryOpenSourceSync(int?targetWidth, int?targetHeight, out ImageData image)
{
if (WebUri is { } webUri)
{
image = default;
var hasFileScheme = webUri.IsAbsoluteUri && webUri.Scheme == "file";
// Local files are assumed as coming from the remote server
var uri = hasFileScheme switch
{
true => new Uri(webUri.PathAndQuery.TrimStart('/'), UriKind.Relative),
_ => webUri
};
if (uri.IsAbsoluteUri)
{
if (uri.Scheme == "http" || uri.Scheme == "https")
{
image = new ImageData
{
Kind = ImageDataKind.Url,
Value = uri.AbsoluteUri,
Source = this
};
}
// TODO: Implement ms-appdata
}
else
{
var path = AssetsPathBuilder.BuildAssetUri(uri.OriginalString);
image = new ImageData
{
Kind = ImageDataKind.Url,
Value = path,
Source = this
};
}
return(image.Kind != default);
}
image = default;
return(false);
}
private static string GetScaledPath(string path, HashSet <string> assets, ResolutionScale?scaleOverride)
{
if (!string.IsNullOrEmpty(path))
{
var directory = Path.GetDirectoryName(path);
var filename = Path.GetFileNameWithoutExtension(path);
var extension = Path.GetExtension(path);
var resolutionScale = scaleOverride == null ? (int)DisplayInformation.GetForCurrentView().ResolutionScale : (int)scaleOverride;
// On Windows, the minimum scale is 100%, however, on Wasm, we can have lower scales.
// This condition is to allow Wasm to use the .scale-100 image when the scale is < 100%
if (resolutionScale < 100)
{
resolutionScale = 100;
}
for (var i = KnownScales.Length - 1; i >= 0; i--)
{
var probeScale = KnownScales[i];
if (resolutionScale >= probeScale)
{
var filePath = Path.Combine(directory, $"{filename}.scale-{probeScale}{extension}");
if (assets.Contains(filePath))
{
return(AssetsPathBuilder.BuildAssetUri(filePath));
}
}
}
return(AssetsPathBuilder.BuildAssetUri(path));
}
return(path);
}
