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Added hex color conversion (#1432)

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* Added hex color conversion

---------

Co-authored-by: Frank Ray <52075808+FrankRay78@users.noreply.github.com>
Co-authored-by: Nils Andresen <nils@nils-andresen.de>
This commit is contained in:
Jonathan Sheely
2024-11-13 07:35:26 -05:00
committed by GitHub
parent a87277e859
commit 574ead6d46
2 changed files with 108 additions and 0 deletions
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44
src/Spectre.Console/Color.cs
View File

@@ -213,6 +213,50 @@ public partial struct Color : IEquatable<Color>
return ColorTable.GetColor(number);
}
/// <summary>
/// Creates a color from a hexadecimal string representation.
/// </summary>
/// <param name="hex">The hexadecimal string representation of the color.</param>
/// <returns>The color created from the hexadecimal string.</returns>
public static Color FromHex(string hex)
{
if (hex is null)
{
throw new ArgumentNullException(nameof(hex));
}
if (hex.StartsWith("#"))
{
hex = hex.Substring(1);
}
var r = byte.Parse(hex.Substring(0, 2), NumberStyles.HexNumber);
var g = byte.Parse(hex.Substring(2, 2), NumberStyles.HexNumber);
var b = byte.Parse(hex.Substring(4, 2), NumberStyles.HexNumber);
return new Color(r, g, b);
}
/// <summary>
/// Tries to convert a hexadecimal color code to a <see cref="Color"/> object.
/// </summary>
/// <param name="hex">The hexadecimal color code.</param>
/// <param name="color">When this method returns, contains the <see cref="Color"/> equivalent of the hexadecimal color code, if the conversion succeeded, or <see cref="Color.Default"/> if the conversion failed.</param>
/// <returns><c>true</c> if the conversion succeeded; otherwise, <c>false</c>.</returns>
public static bool TryFromHex(string hex, out Color color)
{
try
{
color = FromHex(hex);
return true;
}
catch
{
color = Color.Default;
return false;
}
}
/// <summary>
/// Converts a <see cref="ConsoleColor"/> to a <see cref="Color"/>.
/// </summary>

64
src/Tests/Spectre.Console.Tests/Unit/ColorTests.cs
View File

@@ -1,9 +1,73 @@
using System.Drawing;
namespace Spectre.Console.Tests.Unit;
public sealed class ColorTests
{
public sealed class TheEqualsMethod
{
[Theory]
[InlineData("800080")]
[InlineData("#800080")]
public void Should_Consider_Color_And_Color_From_Hex_Equal(string color)
{
// Given
var color1 = new Color(128, 0, 128);
// When
var color2 = Color.FromHex(color);
// Then
color2.ShouldBe(color1);
}
[Theory]
[InlineData("800080")]
[InlineData("#800080")]
public void Should_Consider_Color_And_Color_Try_From_Hex_Equal(string color)
{
// Given
var color1 = new Color(128, 0, 128);
// When
var result = Color.TryFromHex(color, out var color2);
// Then
result.ShouldBeTrue();
color2.ShouldBe(color1);
}
[Theory]
[InlineData(null)]
[InlineData("")]
[InlineData("#")]
[InlineData("#80")]
[InlineData("FOO")]
public void Should_Not_Parse_Non_Color_From_Hex(string noncolor)
{
// Given, When
var result = Record.Exception(() => Color.FromHex(noncolor));
// Then
result.ShouldBeAssignableTo<Exception>();
}
[Theory]
[InlineData(null)]
[InlineData("")]
[InlineData("#")]
[InlineData("#80")]
[InlineData("FOO")]
public void Should_Not_Parse_Non_Color_Try_From_Hex(string noncolor)
{
// Given, When
var result = Color.TryFromHex(noncolor, out var color);
// Then
result.ShouldBeFalse();
color.ShouldBe(Color.Default);
}
[Fact]
public void Should_Consider_Color_And_Non_Color_Equal()
{