internal static void RecordModelsForUndo(Dictionary<ModelBase, UndoRedoRecorder.UserAction> models, UndoRedoRecorder recorder)
{
if (null == recorder)
return;
if (!ShouldProceedWithRecording(models))
return;
using (recorder.BeginActionGroup())
{
foreach (var modelPair in models)
{
switch (modelPair.Value)
{
case UndoRedoRecorder.UserAction.Creation:
recorder.RecordCreationForUndo(modelPair.Key);
break;
case UndoRedoRecorder.UserAction.Deletion:
recorder.RecordDeletionForUndo(modelPair.Key);
break;
case UndoRedoRecorder.UserAction.Modification:
recorder.RecordModificationForUndo(modelPair.Key);
break;
}
}
}
}
/// <summary>
/// TODO(Ben): This method is exposed this way for external codes (e.g.
/// the DragCanvas) to record models before they are modified. This is
/// by no means ideal. The ideal case of course is for ALL codes that
/// end up modifying models to be folded back into WorkspaceViewModel in
/// the form of commands. These commands then internally record those
/// affected models before updating them. We need this method to be gone
/// sooner than later.
/// </summary>
/// <param name="models">The models to be recorded for undo.</param>
/// <param name="recorder"></param>
internal static void RecordModelsForModification(List<ModelBase> models, UndoRedoRecorder recorder)
{
if (null == recorder)
return;
if (!ShouldProceedWithRecording(models))
return;
using (recorder.BeginActionGroup())
{
foreach (var model in models)
recorder.RecordModificationForUndo(model);
}
}
