Mini Kabibi Habibi

using System;

namespace DevExpress.XtraGauges.Demos {
    public partial class TravelingLine : TutorialControl {
        static char[] specChars = new char[] { '.', '\'', ',' };

        int lockTimerCounter;

        int visibleSymbolsCount = 0;
        int substringStartIndex = 0;
        string fullTextToShow = "";

        public TravelingLine() {
            InitializeComponent();
            Init();
        }

        void OnTimerTick(object sender, EventArgs e) {
            if (lockTimerCounter == 0) {
                lockTimerCounter++;
                UpdateText();
                lockTimerCounter--;
            }
        }
        void OnDirectionChanged(object sender, EventArgs e) {
            Init();
        }
        void OnTravelingTextChanged(object sender, EventArgs e) {
            Init();
        }
        void OnTravelingSpeedChanged(object sender, EventArgs e) {
            Init();
        }
        bool IsSpecialCharacter(char character) {
            return Array.IndexOf(specChars, character) != -1;
        }
        protected void Init() {
            timer.Stop();
            timer.Interval = 500 / (travelingSpeed.Value + 1);
            timer.Start();
            fullTextToShow = new string(' ', digitalGauge1.DigitCount) + travelingText.Text + new string(' ', digitalGauge1.DigitCount);
            visibleSymbolsCount = digitalGauge1.DigitCount;
            substringStartIndex = cbDirection.SelectedIndex == 0 ? 0 : fullTextToShow.Length - visibleSymbolsCount;
        }
        protected void UpdateText() {
            int additionalSymbolsCount = Array.FindAll(fullTextToShow.Substring(substringStartIndex, visibleSymbolsCount).ToCharArray(), IsSpecialCharacter).Length;
            digitalGauge1.Text = fullTextToShow.Substring(substringStartIndex, visibleSymbolsCount + additionalSymbolsCount);
            substringStartIndex += cbDirection.SelectedIndex == 0 ? 1 : -1;
            if (substringStartIndex < 0)
                substringStartIndex = fullTextToShow.Length - visibleSymbolsCount;
            else if (substringStartIndex > fullTextToShow.Length - visibleSymbolsCount)
                substringStartIndex = 0;
            if (IsSpecialCharacter(fullTextToShow[substringStartIndex]))
                substringStartIndex += cbDirection.SelectedIndex == 0 ? 1 : -1;
        }
    }
}