/// <summary>
/// Returns the active element belonging to the specified snippet element, or null if no such active element is found.
/// </summary>
public IActiveElement GetActiveElement(SnippetElement owner)
{
if (owner == null)
{
throw new ArgumentNullException(nameof(owner));
}
return(_elementMap.TryGetValue(owner, out var element) ? element : null);
}
/// <summary>
/// Registers an active element. Elements should be registered during insertion and will be called back
/// when insertion has completed.
/// </summary>
/// <param name="owner">The snippet element that created the active element.</param>
/// <param name="element">The active element.</param>
public void RegisterActiveElement(SnippetElement owner, IActiveElement element)
{
if (owner == null)
{
throw new ArgumentNullException(nameof(owner));
}
if (element == null)
{
throw new ArgumentNullException(nameof(element));
}
if (_currentStatus != Status.Insertion)
{
throw new InvalidOperationException();
}
_elementMap.Add(owner, element);
_registeredElements.Add(element);
}