Truncate#

using System;
using UnityEngine;
using VisualScript.Icons;

namespace VisualScript.Runtime
{
    [Get]

    [Title("Truncate")]
    [Category("Operations/Transform/Truncate")]

    [Description("Shortens a text that exceeds a maximum length and appends a suffix at its end")]
    [Image(typeof(IconClamp), ColorTheme.Type.Yellow)]

    [Parameter("Text", "The text that is shortened when it is too long")]
    [Parameter("Max Length", "The maximum amount of characters of the resulting text, suffix included")]
    [Parameter("Suffix", "The text appended when the value is shortened")]

    [Keywords("Ellipsis", "Cut", "Shorten", "Clamp", "Limit", "Text")]

    [Serializable]
    public class TypeStringTruncate : TypeString
    {
        [SerializeField] private GetString m_Text = new GetString();
        [SerializeField] private GetInteger m_MaxLength = new GetInteger(10);
        [SerializeField] private GetString m_Suffix = new GetString("...");

        public override string GetPreview(GameObject source) => Truncate(
            this.m_Text.GetPreview(source),
            (int) this.m_MaxLength.GetPreview(source),
            this.m_Suffix.GetPreview(source)
        );

        public override string Get(Args args) => Truncate(
            this.m_Text.Get(args),
            this.m_MaxLength.GetInt(args),
            this.m_Suffix.Get(args)
        );

        private static string Truncate(string text, int maxLength, string suffix)
        {
            if (string.IsNullOrEmpty(text)) return string.Empty;
            if (maxLength <= 0) return string.Empty;
            if (text.Length <= maxLength) return text;

            suffix ??= string.Empty;
            if (suffix.Length >= maxLength) return suffix.Substring(0, maxLength);

            return string.Concat(text.Substring(0, maxLength - suffix.Length), suffix);
        }

        public override string ToString()
        {
            return $"Truncate {this.m_Text} to {this.m_MaxLength}";
        }

        protected override SubscriptionMode Subscription => SubscriptionMode.OnChange;
    }
}