private async void TryFinishStreamRender(IReportableStream stream)
{
if (!stream.IsCompleted)
{
return;
}
stream.StreamModified -= OnStreamModified;
stream.StreamCompleted -= OnStreamCompleted;
if (renderInProgress)
{
return;
}
await streamedContainer.Dispatcher.BeginInvoke(
new SetEmptyStream(SetEmptyCommandStream),
DispatcherPriority.ApplicationIdle,
streamedContainer);
streamedContainer = null;
stream.Dispose();
streamedOnAfterRender = null;
streamedOnFinished?.Invoke();
streamedOnFinished = null;
_ = Task.Run(() =>
{
GC.Collect(3, GCCollectionMode.Optimized, false);
});
// Warn: This can cause freeze of an entire application
// GC.Collect(3, GCCollectionMode.Forced, true);
}
public async Task <Section> StartStreamRenderAsync(IReportableStream stream, Action <Span> onAfterRender, Action onFinish)
{
Section itemSection = new Section();
itemSection.Blocks.Add(new Paragraph(await StartStreamRenderToSpanAsync(stream, onAfterRender, onFinish)));
return(itemSection);
}
private async Task <Span> StartStreamRenderToSpanAsync(IReportableStream stream, Action <Span> onAfterRender, Action onFinish)
{
if (stream == null)
{
throw new ArgumentNullException(nameof(stream));
}
if (stream.IsClosed)
{
throw new InvalidOperationException("The text stream is already closed.");
}
if (streamedContainer != null)
{
throw new InvalidOperationException("Another stream render already in progress.");
}
if (stream.IsCompleted)
{
string allText;
using (TextReader reader = new StreamReader(stream.Stream, Encoding.UTF8, false, 1024, true))
{
allText = await reader.ReadToEndAsync();
}
Span container = BuildText(allText);
stream.Dispose();
onFinish?.Invoke();
return(container);
}
stream.StreamModified += OnStreamModified;
stream.StreamCompleted += OnStreamCompleted;
renderInProgress = false;
renderIsRequested = false;
streamedContainer = new Span();
streamedPosition = 0;
streamedOnAfterRender = onAfterRender;
streamedOnFinished = onFinish;
return(streamedContainer);
}
private async Task RenderModifiedStreamAsync(IReportableStream stream)
{
renderInProgress = true;
renderIsRequested = false;
string newText;
using (TextReader reader = new StreamReader(stream.Stream, Encoding.UTF8, false, 1024, true))
{
newText = await reader.ReadToEndAsync();
}
await streamedContainer.Dispatcher.BeginInvoke(new RenderMethod(BuildStreamedText), DispatcherPriority.Background, newText);
if (renderIsRequested)
{
// TODO: [P3] A swallowed exception
_ = RenderModifiedStreamAsync(stream);
}
else
{
renderInProgress = false;
TryFinishStreamRender(stream);
}
}
public StreamedItem(IReportableStream stream)
{
Stream = stream;
}
public Task <Section> StartStreamRenderAsync(IReportableStream stream, Action <Span> onAfterRender, Action onFinish)
{
return(streamRenderService.StartStreamRenderAsync(stream, onAfterRender, onFinish));
}