public bool TryDisposeInBatch(RenderBatchBuilder batchBuilder, out Exception exception)
{
_componentWasDisposed = true;
exception = null;
try
{
if (Component is IDisposable disposable)
{
disposable.Dispose();
}
}
catch (Exception ex)
{
exception = ex;
}
// We don't expect these things to throw.
RenderTreeDiffBuilder.DisposeFrames(batchBuilder, CurrentRenderTree.GetFrames());
if (_hasAnyCascadingParameterSubscriptions)
{
RemoveCascadingParameterSubscriptions();
}
DisposeBuffers();
return(exception == null);
}
public void RenderIntoBatch(RenderBatchBuilder batchBuilder, RenderFragment renderFragment)
{
// A component might be in the render queue already before getting disposed by an
// earlier entry in the render queue. In that case, rendering is a no-op.
if (_componentWasDisposed)
{
return;
}
// Swap the old and new tree builders
(CurrentRenderTree, _renderTreeBuilderPrevious) = (_renderTreeBuilderPrevious, CurrentRenderTree);
CurrentRenderTree.Clear();
renderFragment(CurrentRenderTree);
var diff = RenderTreeDiffBuilder.ComputeDiff(
_renderer,
batchBuilder,
ComponentId,
_renderTreeBuilderPrevious.GetFrames(),
CurrentRenderTree.GetFrames());
batchBuilder.UpdatedComponentDiffs.Append(diff);
batchBuilder.InvalidateParameterViews();
}
public ParameterViewLifetime(RenderBatchBuilder owner)
{
_owner = owner;
_stamp = owner.ParameterViewValidityStamp;
}