/// <summary>
/// Called when the renderer needs to display a image.
/// </summary>
/// <returns>A <see cref="Task"/> representing the asynchronous operation.</returns>
async Task <ImageSource> IImageResolver.ResolveImageAsync(string url, string tooltip)
{
var eventArgs = new ImageResolvingEventArgs(url, tooltip);
ImageResolving?.Invoke(this, eventArgs);
await eventArgs.WaitForDeferrals();
try
{
return(eventArgs.Handled
? eventArgs.Image
: new BitmapImage(new Uri(url)));
}
catch (Exception)
{
return(null);
}
}
/// <summary>
/// Called when the renderer needs to display a image.
/// </summary>
/// <returns>A <see cref="Task"/> representing the asynchronous operation.</returns>
async Task <ImageSource> IImageResolver.ResolveImageAsync(string url, string tooltip)
{
if (!Uri.TryCreate(url, UriKind.Absolute, out Uri uri))
{
if (!string.IsNullOrEmpty(UriPrefix))
{
url = string.Format("{0}{1}", UriPrefix, url);
}
}
var eventArgs = new ImageResolvingEventArgs(url, tooltip);
ImageResolving?.Invoke(this, eventArgs);
await eventArgs.WaitForDeferrals();
try
{
return(eventArgs.Handled
? eventArgs.Image
: GetImageSource(new Uri(url)));
}
catch (Exception)
{
return(null);
}
ImageSource GetImageSource(Uri imageUrl)
{
if (_isSvgImageSupported)
{
if (Path.GetExtension(imageUrl.AbsolutePath)?.ToLowerInvariant() == ".svg")
{
return(new SvgImageSource(imageUrl));
}
}
return(new BitmapImage(imageUrl));
}
}