protected ComponentUpdateScope BeginUpdate()
{
var s = new ComponentUpdateScope(this);
(_Scopes ?? (_Scopes = new List <WeakReference <ComponentUpdateScope> >(4))).Add(new WeakReference <ComponentUpdateScope>(s));
return(s);
}
void ComponentUpdateScope.IComponent.EndUpdate(ComponentUpdateScope scope)
{
if (!ComponentUpdateScope.HasScopes(_Scopes, scope) && _IsChangeDefered)
{
_IsChangeDefered = false;
base.StateHasChanged();
}
}
protected new void StateHasChanged()
{
if (ComponentUpdateScope.HasScopes(_Scopes))
{
_IsChangeDefered = true;
}
else
{
_IsChangeDefered = false;
base.StateHasChanged();
}
}
public static bool HasScopes(List <WeakReference <ComponentUpdateScope> > scopes, ComponentUpdateScope removingScope = null)
{
if (scopes != null)
{
for (var i = scopes.Count - 1; i >= 0; i--)
{
if (!scopes[i].TryGetTarget(out var s) || (removingScope != null && s == removingScope))
{
scopes.RemoveAt(i);
}
}
}
return(scopes?.Count > 0);
}
