ボタンのロングタップ対応UniRx版 v0.3 [パフォーマンスに難有り]

できること。
短いタップだったらShortTapを呼ぶ
IntervalAction秒長押しするとLongTapが呼ばれる。

ちょっとまだスマートじゃないのとこれだとﾁｮﾝｯってタップしただけでShortTapが呼ばれちゃうのでそこも何とかしたい。
あと長押ししていても指やカーソルが動きながらPressしてたらLongTapもShortTapも呼ばないようにしたい。
むずいぞ！

using UnityEngine;
using System.Collections;
using System;
using UniRx;
using System.Collections.Generic;


[RequireComponent(typeof(UIButton))]
public class UIButtonLongTapComponent : ObservableMonoBehaviour
{

    [SerializeField]
    float intervalAction = 3.0f;
    public UIScrollView scroll = null;
    float firstTapTime = 0f;
    bool isHoldAction = true;
    // 押しっぱなし時に呼び出すAction
    public Action OnLongTap = null;
    public Action OnShortTap = null;

    Vector3 tapPosition = Vector3.zero;

    BoolReactiveProperty isPressing = new BoolReactiveProperty();
    bool IsPressing { get { return isPressing.Value; } set { isPressing.Value = value; } }

    void Start()
    {
        scroll = this.transform.GetComponentInParents<UIScrollView> ();
        IsPressing = false;

        var tapInStream = this.UpdateAsObservable().Select(_=>IsPressing).Where (_ => _);
        var tapOutStream = this.UpdateAsObservable().Select(_=>IsPressing).Where (_ => !_);
        var tapInOutStream = this.UpdateAsObservable ().SkipUntil (tapInStream).TakeUntil (tapOutStream).Repeat ();

        var moveStream = tapInOutStream
            .Select(x=>scroll.currentMomentum.magnitude)
                .Scan((sum,current)=>sum+current)
                // .Do(x=>Debug.Log("currentMomentum: "+x))
                .FirstOrDefault(x=>x>0.1f)
                .Select(_=> "Move");

        var longTapStream = 
            tapInOutStream.TakeUntil(moveStream).SelectMany(_ => Observable.Timer(TimeSpan.FromSeconds(intervalAction))).Select(_ => "LongTap");


        longTapStream.Subscribe (_ => IsPressing = false);
        moveStream.Subscribe (_ => IsPressing = false);

        tapInStream.TakeUntil(moveStream).Timestamp()
            .SelectMany(_ => tapOutStream.Timestamp(), (s, e) => (e.Timestamp - s.Timestamp).Seconds >= intervalAction)
                .Select(x => x ? "LongTap" : "ShortTap")
                .Merge(longTapStream)
                .FirstOrDefault()
                .RepeatUntilDestroy(gameObject)
                .Subscribe(x =>{
                    Debug.Log(x);
                    if (x == "LongTap")
                        LongTap();
                    if (x == "ShortTap")
                        ShortTap();
                });

    }

    void OnPress (bool pressed)
    {
        IsPressing = pressed;
    }

    public void SetButtonAction(Action shortTap, Action longTap, bool isHoldLongTap) {
        isHoldAction = isHoldLongTap;
        OnLongTap = longTap;
        OnShortTap = shortTap;
    }

    public void CleanAction()
    {
        OnLongTap = null;
    }

    public void LongTap()
    {
        Debug.Log ("LongTap!!");
        if (OnLongTap != null)
            OnLongTap ();
    }
    public void ShortTap()
    {
        Debug.Log ("ShortTap!!");
        if (OnShortTap != null)
            OnShortTap ();
    }

}