STMRTLSupport.cs

//Copyright (c) 2016-2021 Kai Clavier [kaiclavier.com] Do Not Distribute
//Made to work with Arabic Letters Support for Unity by Abdullah Konash [https://github.com/Konash/arabic-support-unity]
using UnityEngine;
using System.Collections;
using System.Collections.Generic;
using ArabicSupport;
using System.Text; //for stringbuilder
using System.Linq;

/*
This will also fix ordering for other RTL languages, not just Arabic!
*/

[ExecuteInEditMode]
[RequireComponent(typeof(SuperTextMesh))]
[DefaultExecutionOrder(-9999)] //to work on enable, this needs to run before Super Text Mesh.
public class STMRTLSupport : MonoBehaviour
{

    public SuperTextMesh superTextMesh;
    [Tooltip("Sending other-language strings through the fixer can cause issues, so this is here so things can be quickly disabled in localized games.")]
    public bool isEnabled = true;
    [Tooltip("Makes sure that tags are formatted properly for RTL.")]
    public bool fixTags = true;
    [Tooltip("Flips curly braces. Temporary until added by Arabic Support script")]
    public bool flipCurlyBraces = true;
    [Tooltip("Flips specified punctuation on numbers.")]
    public char[] reversePunctuationOnNumbers = new char[]{'.', ',', '!', '?', ')', '('};
    [Tooltip("Helps prevent order of words being out of place by extending spaces between letters before adjusting")]
    public bool extendSpaces = true;
    [Tooltip("Assumes that text is typed up in an RTL format")]
    public bool rtl = true;

    public bool showTashkeel = false;
    public bool combineTashkeel = false;
    public bool useHinduNumbers = false;

    public static bool disableAll = false;

    void Reset()
    {
        superTextMesh = GetComponent<SuperTextMesh>();
    }

    void OnEnable()
    {
        superTextMesh.OnPreParse += FixText;
    }
    void OnDisable()
    {
        superTextMesh.OnPreParse -= FixText;
    }

    void FixText(STMTextContainer container)
    {
        if(isEnabled && !disableAll)
        {
            if(fixTags)
            {
                container.text = container.text.Replace("<", " |||<"); //replace with an unusual string
                container.text = container.text.Replace(">", ">||| "); //all thats really needed is that space, so order stays


            }

            if(flipCurlyBraces)
            {
                //flip curly braces, since arabic support script doesn't handle this yet
                //remove this code when curly braces are added to list in Arabic Support
                container.text = container.text.Replace("{", "|||{|||");
                container.text = container.text.Replace("}", "{");
                container.text = container.text.Replace("|||{|||", "}");
            }

            for(int i=0; i<reversePunctuationOnNumbers.Length; i++)
            {
                for(int j=0; j<10; j++) //this makes SURE it only happens on numbers, so arabic letters don't render wrong.
                {
                    //Also for now, this tricks punctuation into being placed on the right side of numbers.
                    container.text = container.text.Replace(j.ToString() + reversePunctuationOnNumbers[i].ToString(), j.ToString() + "ששש" + reversePunctuationOnNumbers[i].ToString());
                }
            }

            if(extendSpaces)
            {
                container.text = container.text.Replace(" ", "  |  ");
            }

            if(rtl)
            {
                List<string> paragraphs = container.text.Split('\n').ToList();

                for(int i=0; i<paragraphs.Count; i++)
                {
                    paragraphs[i] = string.Join(" ", paragraphs[i].Split(new char[]{' '}).Reverse().ToArray());
                }

                container.text = string.Join("\n", paragraphs.ToArray());
            }

            string fixedString = ArabicFixer.Fix(container.text, showTashkeel, combineTashkeel, useHinduNumbers);

            if(extendSpaces)
            {
                fixedString = fixedString.Replace("  |  ", " ");
            }
            for(int i=0; i<reversePunctuationOnNumbers.Length; i++)
            {
                //for(int j=0; j<10; j++)
                //{
                    //Also for now, this tricks punctuation into being placed on the right side of numbers.
                    fixedString = fixedString.Replace(reversePunctuationOnNumbers[i].ToString() + "ששש", reversePunctuationOnNumbers[i].ToString());
                //}
            }
            if(fixTags)
            {
                fixedString = fixedString.Replace(".ששש", ".");

                fixedString = fixedString.Replace("<||| ", ">");
                fixedString = fixedString.Replace(" |||>", "<");

                //also...
                fixedString = fixedString.Replace("<|||", "<");
                fixedString = fixedString.Replace("|||>", ">");
            }

            container.text = fixedString;
        }
    }
}