//--------------------------------------------------------
//    [Author]:           第二世界
//    [  Date ]:           Tuesday, April 10, 2018
//--------------------------------------------------------
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;

namespace Snxxz.UI
{

    public class UGUITypewriter : MonoBehaviour
    {
        [SerializeField] Text m_text;
        public float SPEED = 0.1f;
        private float fSpeed = 0.1f;
        string sContent=string.Empty;
        //void Start()
        //{
        //    SetContent();
        //}
        public void SetContent()
        {
            fSpeed = SPEED;
            sContent = m_text.text;
            curPos = 0;
            fDelta = 0;
        }

        float fDelta;
        int curPos = -1;
        private void LateUpdate()
        {
            if (string.IsNullOrEmpty(sContent) && string.IsNullOrEmpty(m_text.text))
            {
                return;
            }
            if (!sContent.Contains(m_text.text))
            {
                SetContent();
                return;
            }
            if (curPos == sContent.Length)
            {
                return;
            }
            fDelta += Time.deltaTime;
            if (fDelta < fSpeed)
            {
                return;
            }
            fDelta -= fSpeed;

            curPos++;
            m_text.text = sContent.Substring(0, curPos);

        }
        public bool IsNext()
        {
            if (string.IsNullOrEmpty(sContent) && string.IsNullOrEmpty(m_text.text))
            {
                return true;
            }
            else if (curPos == sContent.Length)
            {
                return true;
            }
            else
            {
                fSpeed = 0;
                return false;
            }
        }
    }

}