module-project-validator/Editor/Utilities/EditorIconUtility.cs

using UnityEngine;

namespace Module.ProjectValidator.Editor
{
    internal static class EditorIconUtility
    {
        private static bool _initialized;
        private static GUIContent _warning;
        private static GUIContent _error;
        private static GUIContent _warningRedirect;
        private static GUIContent _errorRedirect;
        private static GUIStyle _style;

        private static void Initialize()
        {
            _initialized = true;
            _warning = new GUIContent(EditorAssetUtility.LoadFirstAsset<Texture>("editor_project_validator_warning"));
            _error = new GUIContent(EditorAssetUtility.LoadFirstAsset<Texture>("editor_project_validator_error"));
            _warningRedirect = new GUIContent(EditorAssetUtility.LoadFirstAsset<Texture>("editor_project_validator_warning_redirect"));
            _errorRedirect = new GUIContent(EditorAssetUtility.LoadFirstAsset<Texture>("editor_project_validator_error_redirect"));
            _style = new GUIStyle();
        }
        
        public static GUIContent GetIcon(EValidatorSeverity severity, bool isRedirect)
        {
            if (!_initialized)
                Initialize();
            
            if (isRedirect)
                return severity == EValidatorSeverity.Warning ? _warningRedirect : _errorRedirect;
            
            return severity == EValidatorSeverity.Warning ? _warning : _error;
        }

        public static void Draw(Rect rect, EValidatorSeverity severity, bool isRedirect)
        {
            if (Event.current.type != EventType.Repaint)
                return;
            
            var content = GetIcon(severity, isRedirect);
            _style.Draw(rect, content, -1);
        }
    }
}