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using System;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
/// <summary>
/// 优化打字功能的字符串
/// </summary>
public class VTypingString
{
enum Tags
{
Color = 0,
Size,
B,
I
}
private VString allContentString;
private DoubleVString partialDisplayString;
private VString willShowString;
private int _timerMS;
private int _factor;
private int _miniSecondPerWord;
private static readonly string[] endTags = new string[] { "</color>", "</size>", "</b>", "</i>" };
private static readonly string[] startTags = new string[] { "<color", "<size", "<b", "<i" };
List<int> endTagCaches = new List<int>();
/// <summary>
///
/// </summary>
/// <param name="text"></param>
/// <param name="miniSecondPerWord">出一个字符需要的毫秒时间</param>
public VTypingString(string text, int miniSecondPerWord = 240)
{
if(string.IsNullOrEmpty(text))
{
throw new ArgumentException("text is null or empty");
}
_miniSecondPerWord = Mathf.Max(miniSecondPerWord, 10);
allContentString = new VString(text.Length);
allContentString.Push(text);
partialDisplayString = new DoubleVString(text.Length);
willShowString = new VString(text.Length);
JumpToBegin();
}
public bool IsEnd()
{
return _factor > allContentString.GetString().Length;
}
public string GetString()
{
return partialDisplayString.GetCurrentVString().GetString();
}
/// <summary>
///
/// </summary>
/// <param name="deltaTimeMS"></param>
/// <returns>true表示触发了一次打字变化</returns>
public bool OnUpdate(int deltaTimeMS)
{
_timerMS += deltaTimeMS;
if(_timerMS >= _miniSecondPerWord)
{
_timerMS = 0;
OnTyping();
return true;
}
return false;
}
private void OnTyping()
{
if (CheckStart(Tags.Color)) { }
else if (CheckStart(Tags.Size)) { }
else if (CheckStart(Tags.B)) { }
else if (CheckStart(Tags.I)) { }
else
{
partialDisplayString.GetCurrentVString().Clear();
partialDisplayString.SwapVString();
partialDisplayString.GetCurrentVString().CopyFrom(allContentString, 0, Mathf.Min(_factor, allContentString.GetString().Length));
for (int i = endTagCaches.Count - 1; i >= 0; --i)
{
partialDisplayString.GetCurrentVString().Push(endTags[endTagCaches[i]]);
}
_factor++;
}
}
public void JumpToBegin()
{
_factor = 0;
_timerMS = -_miniSecondPerWord;
endTagCaches.Clear();
partialDisplayString.GetCurrentVString().Clear();
partialDisplayString.GetNextVString().Clear();
}
public void JumpToEnd()
{
_factor = allContentString.GetString().Length;
endTagCaches.Clear();
OnTyping();
}
bool CheckStart(Tags tag)
{
if (_factor >= allContentString.GetString().Length)
{
return false;
}
int iTag = (int)tag;
willShowString.CopyFrom(allContentString, _factor, allContentString.GetString().Length - _factor);
string willShow = willShowString.GetString();
string endTag = endTags[iTag];
if (willShow.StartsWith(startTags[iTag]))
{
int tagLeng = willShow.IndexOf(">") + 1;
_factor += tagLeng;
endTagCaches.Add(iTag);//倒叙
if (CheckStart(Tags.Color)) { }
else if (CheckStart(Tags.Size)) { }
else if (CheckStart(Tags.B)) { }
else if (CheckStart(Tags.I)) { }
else
{
return false;
}
return true;
}
else if (willShow.StartsWith(endTag))
{
int endleng = endTag.Length;//"</color>"的长度
_factor += endleng;
for (int i = endTagCaches.Count - 1; i >= 0; --i)
{
if(iTag == endTagCaches[i])
{
endTagCaches.RemoveAt(i);
}
}
if (CheckStart(Tags.Color)) { }
else if (CheckStart(Tags.Size)) { }
else if (CheckStart(Tags.B)) { }
else if (CheckStart(Tags.I)) { }
else
{
return false;
}
return true;
}
return false;
}
}
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