Svelto.ECS/Svelto.ECS/Extensions/Unity/UnitySumbmissionEntityViewScheduler .cs

#if UNITY_5 || UNITY_5_3_OR_NEWER
using System.Collections;
using Svelto.WeakEvents;
using UnityEngine;

namespace Svelto.ECS.Schedulers.Unity
{
    //The EntityViewSubmissionScheduler has been introduced to make
    //the entityView submission logic platform indipendent.
    //Please don't be tempted to create your own submission to 
    //adapt to your game level code design. For example,
    //you may be tempted to write a submission logic to submit
    //the entityViews immediatly just because convenient for your game
    //logic. This is not how it works.
    
    public class UnitySumbmissionEntityViewScheduler : EntitySubmissionScheduler
    {
        public UnitySumbmissionEntityViewScheduler()
        {
            GameObject go = new GameObject("ECSScheduler");

            _scheduler = go.AddComponent<Scheduler>();
        }

        public override void Schedule(WeakAction submitEntityViews)
        {
            _scheduler.OnTick = submitEntityViews;
        }

        class Scheduler : MonoBehaviour
        {
            IEnumerator Start()
            {
                while (true)
                {
                    yield return _wait;

                    if (OnTick.IsValid)
                        OnTick.Invoke();
                    else
                        yield break;
                }
            }

            internal WeakAction OnTick;

            readonly WaitForEndOfFrame _wait = new WaitForEndOfFrame();
        }

        readonly Scheduler _scheduler;
    }
}
#endif