SystemColor.cs

/*
 * NanoXLSX is a small .NET library to generate and read XLSX (Microsoft Excel 2007 or newer) files in an easy and native way
 * Copyright Raphael Stoeckli © 2025
 * This library is licensed under the MIT License.
 * You find a copy of the license in project folder or on: http://opensource.org/licenses/MIT
 */
 
using System.Collections.Generic;
using NanoXLSX.Exceptions;
using NanoXLSX.Interfaces;
using NanoXLSX.Utils;
using static NanoXLSX.Themes.SystemColor;
 
namespace NanoXLSX.Themes
{
    public class SystemColor : ITypedColor<Value>
    {
        public enum Value
        {
            ThreeDimensionalDarkShadow,
            ThreeDimensionalLight,
            ActiveBorder,
            ActiveCaption,
            AppWorkspace,
            Background,
            ButtonFace,
            ButtonHighlight,
            ButtonShadow,
            ButtonText,
            CaptionText,
            GradientActiveCaption,
            GradientInactiveCaption,
            GrayText,
            Highlight,
            HighlightText,
            HotLight,
            InactiveBorder,
            InactiveCaption,
            InactiveCaptionText,
            InfoBackground,
            InfoText,
            Menu,
            MenuBar,
            MenuHighlight,
            MenuText,
            ScrollBar,
            Window,
            WindowFrame,
            WindowText,
        }
 
 
        private string lastColor = "000000";

        public Value ColorValue { get; set; } = Value.WindowText;

        public string StringValue { get { return MapValueToString(this.ColorValue); } }

        public string LastColor
        {
            get => lastColor;
            set
            {
                Validators.ValidateColor(value, false);
                lastColor = value;
            }
        }

        public SystemColor()
        {
        }

        public SystemColor(Value value) : this()
        {
            this.ColorValue = value;
        }

        public SystemColor(Value value, string lastColor) : this(value)
        {
            this.LastColor = lastColor;
        }

        private static string MapValueToString(Value value)
        {
            switch (value)
            {
                case Value.ThreeDimensionalDarkShadow: return "3dDkShadow";
                case Value.ThreeDimensionalLight: return "3dLight";
                case Value.ActiveBorder: return "activeBorder";
                case Value.ActiveCaption: return "activeCaption";
                case Value.AppWorkspace: return "appWorkspace";
                case Value.Background: return "background";
                case Value.ButtonFace: return "btnFace";
                case Value.ButtonHighlight: return "btnHighlight";
                case Value.ButtonShadow: return "btnShadow";
                case Value.ButtonText: return "btnText";
                case Value.CaptionText: return "captionText";
                case Value.GradientActiveCaption: return "gradientActiveCaption";
                case Value.GradientInactiveCaption: return "gradientInactiveCaption";
                case Value.GrayText: return "grayText";
                case Value.Highlight: return "highlight";
                case Value.HighlightText: return "highlightText";
                case Value.HotLight: return "hotLight";
                case Value.InactiveBorder: return "inactiveBorder";
                case Value.InactiveCaption: return "inactiveCaption";
                case Value.InactiveCaptionText: return "inactiveCaptionText";
                case Value.InfoBackground: return "infoBk";
                case Value.InfoText: return "infoText";
                case Value.Menu: return "menu";
                case Value.MenuBar: return "menuBar";
                case Value.MenuHighlight: return "menuHighlight";
                case Value.MenuText: return "menuText";
                case Value.ScrollBar: return "scrollBar";
                case Value.Window: return "window";
                case Value.WindowFrame: return "windowFrame";
                case Value.WindowText: return "windowText";
                default:
                    throw new StyleException(value + " is not a valid system color value");
            }
        }

        internal static Value MapStringToValue(string value)
        {
            switch (value)
            {
                case "3dDkShadow": return Value.ThreeDimensionalDarkShadow;
                case "3dLight": return Value.ThreeDimensionalLight;
                case "activeBorder": return Value.ActiveBorder;
                case "activeCaption": return Value.ActiveCaption;
                case "appWorkspace": return Value.AppWorkspace;
                case "background": return Value.Background;
                case "btnFace": return Value.ButtonFace;
                case "btnHighlight": return Value.ButtonHighlight;
                case "btnShadow": return Value.ButtonShadow;
                case "btnText": return Value.ButtonText;
                case "captionText": return Value.CaptionText;
                case "gradientActiveCaption": return Value.GradientActiveCaption;
                case "gradientInactiveCaption": return Value.GradientInactiveCaption;
                case "grayText": return Value.GrayText;
                case "highlight": return Value.Highlight;
                case "highlightText": return Value.HighlightText;
                case "hotLight": return Value.HotLight;
                case "inactiveBorder": return Value.InactiveBorder;
                case "inactiveCaption": return Value.InactiveCaption;
                case "inactiveCaptionText": return Value.InactiveCaptionText;
                case "infoBk": return Value.InfoBackground;
                case "infoText": return Value.InfoText;
                case "menu": return Value.Menu;
                case "menuBar": return Value.MenuBar;
                case "menuHighlight": return Value.MenuHighlight;
                case "menuText": return Value.MenuText;
                case "scrollBar": return Value.ScrollBar;
                case "window": return Value.Window;
                case "windowFrame": return Value.WindowFrame;
                case "windowText": return Value.WindowText;
                default:
                    throw new StyleException(value + " is not a valid system color value");
            }
        }

        public override bool Equals(object obj)
        {
            return obj is SystemColor color &&
                   ColorValue == color.ColorValue &&
                   LastColor == color.LastColor;
        }

        public override int GetHashCode()
        {
            unchecked
            {
                int hashCode = 1425985453;
                hashCode = hashCode * -1521134295 + ColorValue.GetHashCode();
                hashCode = hashCode * -1521134295 + EqualityComparer<string>.Default.GetHashCode(LastColor);
                return hashCode;
            }
        }
    }
}