async void ImageLoadingFinished(CachedImage element)
{
await ImageService.Instance.Config.MainThreadDispatcher.PostAsync(() =>
{
if (element != null && !_isDisposed)
{
((IVisualElementController)element).NativeSizeChanged();
element.SetIsLoading(false);
}
});
}
private async void ImageLoadingSizeChanged(CachedImage element, bool isLoading)
{
if (element != null && !_isDisposed)
{
await ImageService.Instance.Config.MainThreadDispatcher.PostAsync(() =>
{
if (!isLoading || !_isSizeSet)
{
((IVisualElementController)element).NativeSizeChanged();
_isSizeSet = true;
}
if (!isLoading)
{
element.SetIsLoading(isLoading);
}
});
}
}
private async void ImageLoadingSizeChanged(CachedImage element, bool isLoading)
{
if (element == null || _isDisposed)
{
return;
}
await ImageService.Instance.Config.MainThreadDispatcher.PostAsync(() =>
{
if (element == null || _isDisposed)
{
return;
}
((IVisualElementController)element).NativeSizeChanged();
if (!isLoading)
{
element.SetIsLoading(isLoading);
}
}).ConfigureAwait(false);
}
private void UpdateBitmap(CachedImageView imageView, CachedImage image, CachedImage previousImage)
{
lock (_updateBitmapLock)
{
CancelIfNeeded();
if (image == null || imageView == null || imageView.Handle == IntPtr.Zero || _isDisposed)
{
return;
}
var ffSource = ImageSourceBinding.GetImageSourceBinding(image.Source, image);
if (ffSource == null)
{
if (_lastImageSource == null)
{
return;
}
_lastImageSource = null;
imageView.SetImageResource(Android.Resource.Color.Transparent);
return;
}
if (previousImage != null && !ffSource.Equals(_lastImageSource))
{
_lastImageSource = null;
imageView.SkipInvalidate();
Control.SetImageResource(Android.Resource.Color.Transparent);
}
image.SetIsLoading(true);
var placeholderSource = ImageSourceBinding.GetImageSourceBinding(image.LoadingPlaceholder, image);
var errorPlaceholderSource = ImageSourceBinding.GetImageSourceBinding(image.ErrorPlaceholder, image);
image.SetupOnBeforeImageLoading(out var imageLoader, ffSource, placeholderSource, errorPlaceholderSource);
if (imageLoader != null)
{
var finishAction = imageLoader.OnFinish;
var sucessAction = imageLoader.OnSuccess;
imageLoader.Finish((work) =>
{
finishAction?.Invoke(work);
ImageLoadingSizeChanged(image, false);
});
imageLoader.Success((imageInformation, loadingResult) =>
{
sucessAction?.Invoke(imageInformation, loadingResult);
_lastImageSource = ffSource;
});
imageLoader.LoadingPlaceholderSet(() => ImageLoadingSizeChanged(image, true));
if (!_isDisposed)
{
_currentTask = imageLoader.Into(imageView);
}
}
}
}