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Add support for RGB colors

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Closes #34
This commit is contained in:
Patrik Svensson 2020-08-11 07:54:01 +02:00 committed by Patrik Svensson
parent bcfc495843
commit 717931f11c
2 changed files with 78 additions and 0 deletions
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29
src/Spectre.Console.Tests/Unit/StyleTests.cs
View File

@ -153,6 +153,35 @@ namespace Spectre.Console.Tests.Unit
result.ShouldNotBeNull();
result.Message.ShouldBe(expected);
}
[Theory]
[InlineData("rgb(255,0,0) on rgb(0,0,255)")]
public void Should_Parse_Rgb_Colors_Correctly(string style)
{
// Given, When
var result = Style.Parse(style);
// Then
result.Foreground.ShouldBe(Color.Red);
result.Background.ShouldBe(Color.Blue);
}
[Theory]
[InlineData("rgb()", "Invalid RGB color 'rgb()'.")]
[InlineData("rgb(", "Invalid RGB color 'rgb('.")]
[InlineData("rgb(255)", "Invalid RGB color 'rgb(255)'.")]
[InlineData("rgb(255,255)", "Invalid RGB color 'rgb(255,255)'.")]
[InlineData("rgb(255,255,255", "Invalid RGB color 'rgb(255,255,255'.")]
[InlineData("rgb(A,B,C)", "Invalid RGB color 'rgb(A,B,C)'. Input string was not in a correct format.")]
public void Should_Return_Error_If_Rgb_Color_Is_Invalid(string style, string expected)
{
// Given, When
var result = Record.Exception(() => Style.Parse(style));
// Then
result.ShouldNotBeNull();
result.Message.ShouldBe(expected);
}
}
public sealed class TheTryParseMethod

49
src/Spectre.Console/Internal/Text/StyleParser.cs
View File

@ -1,4 +1,6 @@
using System;
using System.Diagnostics.CodeAnalysis;
using System.Globalization;
namespace Spectre.Console.Internal
{
@ -65,6 +67,14 @@ namespace Spectre.Console.Internal
return null;
}
}
else if (part.StartsWith("rgb", StringComparison.OrdinalIgnoreCase))
{
color = ParseRgbColor(part, out error);
if (!string.IsNullOrWhiteSpace(error))
{
return null;
}
}
else
{
error = !foreground
@ -102,6 +112,7 @@ namespace Spectre.Console.Internal
return new Style(effectiveForeground, effectiveBackground, effectiveDecoration);
}
[SuppressMessage("Design", "CA1031:Do not catch general exception types")]
private static Color? ParseHexColor(string hex, out string error)
{
error = null;
@ -138,5 +149,43 @@ namespace Spectre.Console.Internal
error = $"Invalid hex color '#{hex}'.";
return null;
}
[SuppressMessage("Design", "CA1031:Do not catch general exception types")]
private static Color? ParseRgbColor(string rgb, out string error)
{
try
{
error = null;
var normalized = rgb ?? string.Empty;
if (normalized.Length >= 3)
{
// Trim parenthesises
normalized = normalized.Substring(3).Trim();
if (normalized.StartsWith("(", StringComparison.OrdinalIgnoreCase) &&
normalized.EndsWith(")", StringComparison.OrdinalIgnoreCase))
{
normalized = normalized.Trim('(').Trim(')');
var parts = normalized.Split(new[] { ',' }, StringSplitOptions.RemoveEmptyEntries);
if (parts.Length == 3)
{
return new Color(
(byte)Convert.ToInt32(parts[0], CultureInfo.InvariantCulture),
(byte)Convert.ToInt32(parts[1], CultureInfo.InvariantCulture),
(byte)Convert.ToInt32(parts[2], CultureInfo.InvariantCulture));
}
}
}
}
catch (Exception ex)
{
error = $"Invalid RGB color '{rgb}'. {ex.Message}";
return null;
}
error = $"Invalid RGB color '{rgb}'.";
return null;
}
}
}