/// <inheritdoc />
public override void Undo(DocumentEditorContext context)
{
var caret = (TextCaret)_handle.GetCaret(context);
var block = caret.Block;
// optimization; if it was originally a block of the same type, we can just deserialize
// but leave it in-place
if (block.DescriptorHandle == _originalDescriptor)
{
var originalBlock = block;
originalBlock.DeserializeProperties(_originalProperties);
}
else
{
// otherwise we have to re-create it
TextBlock original = (TextBlock)_originalDescriptor.CreateInstance();
original.DeserializeProperties(_originalProperties);
Replace(context, caret.Block, original);
}
}
