Remove export code as it's not needed

src/PixiEditor/Models/IO/PaletteParsers/CorelDrawPalParser.cs

@@ -10,9 +10,6 @@ internal class CorelDrawPalParser : PaletteFileParser
     public override string FileName { get; } = "CorelDRAW! 3.0 Palette";
     public override string[] SupportedFileExtensions { get; } = { ".pal" };
 
-    // Default name to use for colors (color name is required by format)
-    private const string SWATCH_NAME = "PixiEditor Color";
-
     public override async Task<PaletteFileData> Parse(string path)
     {
         try
@@ -72,51 +69,9 @@ internal class CorelDrawPalParser : PaletteFileParser
 
     public override bool CanSave => false;
 
-    // NOTE: saving data works but PixiEditor defaults to first .pal parser which
-    //       is JASC so saving to an actual file is currently not available.
-    //       Palette exporter needs to be refactored to support multiple formats of
-    //       same file extension.
     public override async Task<bool> Save(string path, PaletteFileData data)
     {
-        StringBuilder sb = new StringBuilder(SWATCH_NAME.Length + 20);
-
-        try
-        {
-            await using (Stream stream = File.OpenWrite(path))
-            {
-                using (TextWriter writer = new StreamWriter(stream, Encoding.ASCII, 1024, true))
-                {
-                    foreach (var color in data.Colors)
-                    {
-                        this.ConvertRgbToCmyk(color, out byte c, out byte m, out byte y, out byte k);
-
-                        this.WriteName(sb, SWATCH_NAME);
-                        this.WriteNumber(sb, c);
-                        this.WriteNumber(sb, m);
-                        this.WriteNumber(sb, y);
-                        this.WriteNumber(sb, k);
-
-                        writer.WriteLine(sb.ToString());
-                        sb.Length = 0;
-                    }
-                }
-            }
-            return true;
-        }
-        catch
-        {
-            return false;
-        }
-    }
-
-    private static byte ClampCmyk(float value)
-    {
-        if (value < 0 || float.IsNaN(value))
-        {
-            value = 0;
-        }
-
-        return Convert.ToByte(value * 100);
+        throw new SavingNotSupportedException("Saving palette as CorelDRAW! 3.0 palette directly is not supported.");
     }
 
     private PaletteColor ConvertCmykToRgb(int c, int m, int y, int k)
@@ -133,23 +88,6 @@ internal class CorelDrawPalParser : PaletteFileParser
         return new PaletteColor((byte)r, (byte)g, (byte)b);
     }
 
-    private void ConvertRgbToCmyk(PaletteColor color, out byte c, out byte m, out byte y, out byte k)
-    {
-        float r, g, b;
-        float divisor;
-
-        r = color.R / 255F;
-        g = color.G / 255F;
-        b = color.B / 255F;
-
-        divisor = 1 - Math.Max(Math.Max(r, g), b);
-
-        c = ClampCmyk((1 - r - divisor) / (1 - divisor));
-        m = ClampCmyk((1 - g - divisor) / (1 - divisor));
-        y = ClampCmyk((1 - b - divisor) / (1 - divisor));
-        k = ClampCmyk(divisor);
-    }
-
     private byte NextNumber(string line, ref int start)
     {
         int length;
@@ -185,36 +123,4 @@ internal class CorelDrawPalParser : PaletteFileParser
 
         return result;
     }
-
-    private void WriteName(StringBuilder sb, string name)
-    {
-        sb.Append('"');
-        sb.Append(name);
-        sb.Append('"');
-
-        for (int j = (name ?? string.Empty).Length; j < name.Length; j++)
-        {
-            sb.Append(' ');
-        }
-    }
-
-    private void WriteNumber(StringBuilder sb, byte value)
-    {
-        if (value == 100)
-        {
-            sb.Append("100 ");
-        }
-        else
-        {
-            sb.Append(' ');
-            if (value < 10)
-            {
-                sb.Append(' ');
-            }
-
-            sb.Append(value);
-
-            sb.Append(' ');
-        }
-    }
 }