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Patrik Svensson
2020-07-21 12:03:41 +02:00
commit 334dcddc1a
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158
src/Spectre.Console/Internal/Colors/ColorPalette.cs Normal file
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using System;
using System.Collections.Generic;
using System.Linq;
namespace Spectre.Console.Internal
{
internal static class ColorPalette
{
public static IReadOnlyList<Color> Legacy { get; }
public static IReadOnlyList<Color> Standard { get; }
public static IReadOnlyList<Color> EightBit { get; }
static ColorPalette()
{
Legacy = new List<Color>
{
Color.Black, Color.Maroon, Color.Green, Color.Olive,
Color.Navy, Color.Purple, Color.Teal, Color.Silver,
};
Standard = new List<Color>(Legacy)
{
Color.Grey, Color.Red, Color.Lime, Color.Yellow,
Color.Blue, Color.Fuchsia, Color.Aqua, Color.White,
};
EightBit = new List<Color>(Standard)
{
Color.Grey0, Color.NavyBlue, Color.DarkBlue, Color.Blue3,
Color.Blue3_1, Color.Blue1, Color.DarkGreen, Color.DeepSkyBlue4,
Color.DeepSkyBlue4_1, Color.DeepSkyBlue4_2, Color.DodgerBlue3, Color.DodgerBlue2,
Color.Green4, Color.SpringGreen4, Color.Turquoise4, Color.DeepSkyBlue3,
Color.DeepSkyBlue3_1, Color.DodgerBlue1, Color.Green3, Color.SpringGreen3,
Color.DarkCyan, Color.LightSeaGreen, Color.DeepSkyBlue2, Color.DeepSkyBlue1,
Color.Green3_1, Color.SpringGreen3_1, Color.SpringGreen2, Color.Cyan3,
Color.DarkTurquoise, Color.Turquoise2, Color.Green1, Color.SpringGreen2_1,
Color.SpringGreen1, Color.MediumSpringGreen, Color.Cyan2, Color.Cyan1,
Color.DarkRed, Color.DeepPink4, Color.Purple4, Color.Purple4_1,
Color.Purple3, Color.BlueViolet, Color.Orange4, Color.Grey37,
Color.MediumPurple4, Color.SlateBlue3, Color.SlateBlue3_1, Color.RoyalBlue1,
Color.Chartreuse4, Color.DarkSeaGreen4, Color.PaleTurquoise4, Color.SteelBlue,
Color.SteelBlue3, Color.CornflowerBlue, Color.Chartreuse3, Color.DarkSeaGreen4_1,
Color.CadetBlue, Color.CadetBlue_1, Color.SkyBlue3, Color.SteelBlue1,
Color.Chartreuse3_1, Color.PaleGreen3, Color.SeaGreen3, Color.Aquamarine3,
Color.MediumTurquoise, Color.SteelBlue1_1, Color.Chartreuse2, Color.SeaGreen2,
Color.SeaGreen1, Color.SeaGreen1_1, Color.Aquamarine1, Color.DarkSlateGray2,
Color.DarkRed_1, Color.DeepPink4_1, Color.DarkMagenta, Color.DarkMagenta_1,
Color.DarkViolet, Color.Purple_1, Color.Orange4_1, Color.LightPink4,
Color.Plum4, Color.MediumPurple3, Color.MediumPurple3_1, Color.SlateBlue1,
Color.Yellow4, Color.Wheat4, Color.Grey53, Color.LightSlateGrey,
Color.MediumPurple, Color.LightSlateBlue, Color.Yellow4_1, Color.DarkOliveGreen3,
Color.DarkSeaGreen, Color.LightSkyBlue3, Color.LightSkyBlue3_1, Color.SkyBlue2,
Color.Chartreuse2_1, Color.DarkOliveGreen3_1, Color.PaleGreen3_1, Color.DarkSeaGreen3,
Color.DarkSlateGray3, Color.SkyBlue1, Color.Chartreuse1, Color.LightGreen,
Color.LightGreen_1, Color.PaleGreen1, Color.Aquamarine1_1, Color.DarkSlateGray1,
Color.Red3, Color.DeepPink4_2, Color.MediumVioletRed, Color.Magenta3,
Color.DarkViolet_1, Color.Purple_2, Color.DarkOrange3, Color.IndianRed,
Color.HotPink3, Color.MediumOrchid3, Color.MediumOrchid, Color.MediumPurple2,
Color.DarkGoldenrod, Color.LightSalmon3, Color.RosyBrown, Color.Grey63,
Color.MediumPurple2_1, Color.MediumPurple1, Color.Gold3, Color.DarkKhaki,
Color.NavajoWhite3, Color.Grey69, Color.LightSteelBlue3, Color.LightSteelBlue,
Color.Yellow3, Color.DarkOliveGreen3_2, Color.DarkSeaGreen3_1, Color.DarkSeaGreen2,
Color.LightCyan3, Color.LightSkyBlue1, Color.GreenYellow, Color.DarkOliveGreen2,
Color.PaleGreen1_1, Color.DarkSeaGreen2_1, Color.DarkSeaGreen1, Color.PaleTurquoise1,
Color.Red3_1, Color.DeepPink3, Color.DeepPink3_1, Color.Magenta3_1,
Color.Magenta3_2, Color.Magenta2, Color.DarkOrange3_1, Color.IndianRed_1,
Color.HotPink3_1, Color.HotPink2, Color.Orchid, Color.MediumOrchid1,
Color.Orange3, Color.LightSalmon3_1, Color.LightPink3, Color.Pink3,
Color.Plum3, Color.Violet, Color.Gold3_1, Color.LightGoldenrod3,
Color.Tan, Color.MistyRose3, Color.Thistle3, Color.Plum2,
Color.Yellow3_1, Color.Khaki3, Color.LightGoldenrod2, Color.LightYellow3,
Color.Grey84, Color.LightSteelBlue1, Color.Yellow2, Color.DarkOliveGreen1,
Color.DarkOliveGreen1_1, Color.DarkSeaGreen1_1, Color.Honeydew2, Color.LightCyan1,
Color.Red1, Color.DeepPink2, Color.DeepPink1, Color.DeepPink1_1,
Color.Magenta2_1, Color.Magenta1, Color.OrangeRed1, Color.IndianRed1,
Color.IndianRed1_1, Color.HotPink, Color.HotPink_1, Color.MediumOrchid1_1,
Color.DarkOrange, Color.Salmon1, Color.LightCoral, Color.PaleVioletRed1,
Color.Orchid2, Color.Orchid1, Color.Orange1, Color.SandyBrown,
Color.LightSalmon1, Color.LightPink1, Color.Pink1, Color.Plum1,
Color.Gold1, Color.LightGoldenrod2_1, Color.LightGoldenrod2_2, Color.NavajoWhite1,
Color.MistyRose1, Color.Thistle1, Color.Yellow1, Color.LightGoldenrod1,
Color.Khaki1, Color.Wheat1, Color.Cornsilk1, Color.Grey100,
Color.Grey3, Color.Grey7, Color.Grey11, Color.Grey15,
Color.Grey19, Color.Grey23, Color.Grey27, Color.Grey30,
Color.Grey35, Color.Grey39, Color.Grey42, Color.Grey46,
Color.Grey50, Color.Grey54, Color.Grey58, Color.Grey62,
Color.Grey66, Color.Grey70, Color.Grey74, Color.Grey78,
Color.Grey82, Color.Grey85, Color.Grey89, Color.Grey93,
};
}
internal static Color ExactOrClosest(ColorSystem system, Color color)
{
var exact = Exact(system, color);
if (exact != null)
{
return exact.Value;
}
return Closest(system, color);
}
private static Color? Exact(ColorSystem system, Color color)
{
if (system == ColorSystem.TrueColor)
{
return color;
}
var palette = system switch
{
ColorSystem.Legacy => Legacy,
ColorSystem.Standard => Standard,
ColorSystem.EightBit => EightBit,
_ => throw new NotSupportedException(),
};
return palette
.Where(c => c.Equals(color))
.Cast<Color?>()
.FirstOrDefault();
}
private static Color Closest(ColorSystem system, Color color)
{
if (system == ColorSystem.TrueColor)
{
return color;
}
var palette = system switch
{
ColorSystem.Legacy => Legacy,
ColorSystem.Standard => Standard,
ColorSystem.EightBit => EightBit,
_ => throw new NotSupportedException(),
};
// https://stackoverflow.com/a/9085524
static double Distance(Color first, Color second)
{
var rmean = ((float)first.R + second.R) / 2;
var r = first.R - second.R;
var g = first.G - second.G;
var b = first.B - second.B;
return Math.Sqrt(
((int)((512 + rmean) * r * r) >> 8)
+ (4 * g * g)
+ ((int)((767 - rmean) * b * b) >> 8));
}
return Enumerable.Range(0, int.MaxValue)
.Zip(palette, (id, other) => (Distance: Distance(other, color), Id: id, Color: other))
.OrderBy(x => x.Distance)
.FirstOrDefault().Color;
}
}
}

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src/Spectre.Console/Internal/Colors/ColorSystemDetector.cs Normal file
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using System;
using System.Runtime.InteropServices;
using System.Text.RegularExpressions;
namespace Spectre.Console.Internal
{
internal static class ColorSystemDetector
{
// Adapted from https://github.com/willmcgugan/rich/blob/f0c29052c22d1e49579956a9207324d9072beed7/rich/console.py#L391
// which I think is battletested enough to trust.
public static ColorSystem Detect(bool supportsAnsi)
{
if (Environment.GetEnvironmentVariables().Contains("NO_COLOR"))
{
// No colors supported
return ColorSystem.NoColors;
}
else if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
{
if (supportsAnsi)
{
var regex = new Regex("^Microsoft Windows (?'major'[0-9]*).(?'minor'[0-9]*).(?'build'[0-9]*)$");
var match = regex.Match(RuntimeInformation.OSDescription);
if (match.Success && int.TryParse(match.Groups["major"].Value, out var major))
{
if (major > 10)
{
// Future Patrik will thank me.
return ColorSystem.TrueColor;
}
if (major == 10 && int.TryParse(match.Groups["build"].Value, out var build) && build >= 15063)
{
return ColorSystem.TrueColor;
}
}
}
}
else
{
var colorTerm = Environment.GetEnvironmentVariable("COLORTERM");
if (!string.IsNullOrWhiteSpace(colorTerm))
{
if (colorTerm.Equals("truecolor", StringComparison.OrdinalIgnoreCase) ||
colorTerm.Equals("24bit", StringComparison.OrdinalIgnoreCase))
{
return ColorSystem.TrueColor;
}
}
}
return ColorSystem.EightBit;
}
}
}