/// <summary>
/// OperationManagerのUndoStackとマージします。
/// 統合されたOperationはUndoStackから除外されます。
/// Operationが統合された場合OperationManagerのRedoStackはクリアされます。
/// </summary>
public IOperation Merge(IOperationController operationController)
{
if (operationController.CanUndo is false)
{
return(this);
}
if (MergeJudge is null)
{
return(this);
}
var topCommand = operationController.Peek();
var mergeInfo = MergeJudge;
while (topCommand is MergeableOperation mergeableOperation)
{
if (MergeJudge.CanMerge(mergeableOperation.MergeJudge) is false)
{
break;
}
mergeInfo = mergeableOperation.MergeJudge;
_rollBack = mergeableOperation._rollBack;
operationController.Pop();
topCommand = operationController.Peek();
}
MergeJudge = MergeJudge.Update(mergeInfo);
return(this);
}
public MergeableOperation(NamedAction invoke, NamedAction rollback, IMergeJudge mergeJudge = null)
{
Debug.Assert(invoke != null);
Debug.Assert(rollback != null);
_rollForward = invoke;
_rollBack = rollback;
MergeJudge = mergeJudge;
}
public MergeableOperation(Action invoke, Action rollback, IMergeJudge mergeJudge = null)
{
Debug.Assert(invoke != null);
Debug.Assert(rollback != null);
_rollForward = new NamedAction()
{
Action = invoke
};
_rollBack = new NamedAction()
{
Action = rollback
};
MergeJudge = mergeJudge;
}