bool IUndoEngineOperations.UndoCore()
{
bool succeeded = false;
if (undoBuffer.Count > 0)
{
UndoUnit unitToUndo = undoBuffer.Last();
undoBuffer.RemoveAt(undoBuffer.Count - 1);
unitToUndo.Undo();
redoBuffer.Add(unitToUndo);
NotifyUndoExecuted(unitToUndo);
succeeded = true;
}
return(succeeded);
}
bool IUndoEngineOperations.UndoCore()
{
//if there is anything to undo
bool succeeded = false;
if (this.containerUndoUnit.DoList.Count > 0)
{
//get the last element done
UndoUnit unitToUndo = this.containerUndoUnit.DoList.Last();
//remove it
this.containerUndoUnit.DoList.RemoveAt(this.containerUndoUnit.DoList.Count - 1);
//undo it
unitToUndo.Undo();
//and insert to the head of redo list
this.containerUndoUnit.RedoList.Insert(0, unitToUndo);
succeeded = true;
}
return(succeeded);
}