/// <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);
}
/// <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>
/// <param name="operationController"></param>
/// <returns></returns>
public IOperation Merge(IOperationController operationController)
{
if (operationController.CanUndo is false)
{
return(this);
}
if (MergeJudge is null)
{
return(this);
}
var topCommand = operationController.Peek();
var prevValue = PrevProperty;
var mergeInfo = MergeJudge;
while (topCommand is MergeableOperation <T> propertyChangeOperation)
{
if (MergeJudge.CanMerge(propertyChangeOperation.MergeJudge) is false)
{
break;
}
mergeInfo = propertyChangeOperation.MergeJudge;
prevValue = propertyChangeOperation.PrevProperty;
operationController.Pop();
topCommand = operationController.Peek();
}
PrevProperty = prevValue;
MergeJudge = mergeInfo;
return(this);
}
public static IOperation ExecuteAndCombineTop(this IOperation _this, IOperationController controller)
{
if (controller.Operations.Any())
{
var prev = controller.Pop();
_this.RollForward();
var newOperation = prev.CombineOperations(_this).ToCompositeOperation();
newOperation.Messaage = _this.Messaage;
return(controller.Push(newOperation));
}
return(controller.Execute(_this));
}
