private void HandleComponentRender(RenderEvent renderEvent)
{
if (renderEvent.DidComponentRender(ComponentId))
{
_logger.LogDebug(new EventId(1, nameof(HandleComponentRender)), $"Received a new render where component {ComponentId} did render.");
RenderCount++;
// First notify derived types, e.g. queried AngleSharp collections or elements
// that the markup has changed and they should rerun their queries.
HandleChangesToMarkup(renderEvent);
// Then it is safe to tell anybody waiting on updates or changes to the rendered fragment
// that they can redo their assertions or continue processing.
OnAfterRender?.Invoke();
}
}
private void HandleChangesToMarkup(RenderEvent renderEvent)
{
if (renderEvent.HasMarkupChanges(ComponentId))
{
_logger.LogDebug(new EventId(1, nameof(HandleChangesToMarkup)), $"Received a new render where the markup of component {ComponentId} changed.");
// The lock ensures that latest nodes is always based on the latest rendered markup.
lock (_lock)
{
_latestRenderNodes = null;
_markup = RetrieveLatestMarkupFromRenderer();
}
OnMarkupUpdated?.Invoke();
}
else if (renderEvent.DidComponentDispose(ComponentId))
{
_logger.LogDebug(new EventId(1, nameof(HandleChangesToMarkup)), $"Received a new render where the component {ComponentId} was disposed.");
Renderer.RemoveRenderEventHandler(this);
}
}
Task IRenderEventHandler.Handle(RenderEvent renderEvent)
{
HandleComponentRender(renderEvent);
return(Task.CompletedTask);
}
public Task Handle(RenderEvent renderEvent)
{
ReceivedEvents.Add(renderEvent);
return(_handleTask.Task);
}