public void Undo()
{
if (!CanUndo)
{
throw new InvalidOperationException("Undo stack is empty");
}
var memento = undoStack.Pop();
changeTracker.TrackChanges = false;
changeTracker.OnBeforeUndo(memento);
if (BeforeUndo != null)
{
BeforeUndo(this, new UndoRedoEventArgs {
Memento = memento
});
}
memento = memento.Restore();
redoStack.Push(memento);
if (AfterUndo != null)
{
AfterUndo(this, new UndoRedoEventArgs {
Memento = memento
});
}
changeTracker.TrackChanges = trackChanges;
}
public void Undo()
{
if (!CanUndo)
{
throw new InvalidOperationException("Undo stack is empty");
}
var memento = undoStack.Pop();
changeTracker.AddNewMementoCallback = AddRedo;
if (BeforeUndo != null)
{
BeforeUndo(this, new UndoRedoEventArgs {
Memento = memento
});
}
changeTracker.OnBeforeUndo(memento);
try
{
EditActionSettings.Disabled = true;
memento.Restore();
}
finally
{
EditActionSettings.Disabled = false;
}
changeTracker.OnAfterUndo(memento);
if (AfterUndo != null)
{
AfterUndo(this, new UndoRedoEventArgs {
Memento = memento
});
}
changeTracker.AddNewMementoCallback = AddUndo;
}