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Add support for hex colors

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Closes #33
This commit is contained in:
Patrik Svensson 2020-08-11 07:54:00 +02:00 committed by Patrik Svensson
parent 9aa36c4cf0
commit bcfc495843
2 changed files with 80 additions and 91 deletions
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118
src/Spectre.Console.Tests/Unit/StyleTests.cs
View File

@ -126,108 +126,54 @@ namespace Spectre.Console.Tests.Unit
result.ShouldBeOfType<InvalidOperationException>();
result.Message.ShouldBe("Could not find color 'lol'.");
}
[Theory]
[InlineData("#FF0000 on #0000FF")]
[InlineData("#F00 on #00F")]
public void Should_Parse_Hex_Colors_Correctly(string style)
{
// Given, When
var result = Style.Parse(style);
// Then
result.Foreground.ShouldBe(Color.Red);
result.Background.ShouldBe(Color.Blue);
}
[Theory]
[InlineData("#", "Invalid hex color '#'.")]
[InlineData("#FF00FF00FF", "Invalid hex color '#FF00FF00FF'.")]
[InlineData("#FOO", "Invalid hex color '#FOO'. Could not find any recognizable digits.")]
public void Should_Return_Error_If_Hex_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
{
[Fact]
public void Default_Keyword_Should_Return_Default_Style()
public void Should_Return_True_If_Parsing_Succeeded()
{
// Given, When
var result = Style.TryParse("default", out var style);
var result = Style.TryParse("bold", out var style);
// Then
result.ShouldBeTrue();
style.ShouldNotBeNull();
style.Foreground.ShouldBe(Color.Default);
style.Background.ShouldBe(Color.Default);
style.Decoration.ShouldBe(Decoration.None);
}
[Theory]
[InlineData("bold", Decoration.Bold)]
[InlineData("dim", Decoration.Dim)]
[InlineData("italic", Decoration.Italic)]
[InlineData("underline", Decoration.Underline)]
[InlineData("invert", Decoration.Invert)]
[InlineData("conceal", Decoration.Conceal)]
[InlineData("slowblink", Decoration.SlowBlink)]
[InlineData("rapidblink", Decoration.RapidBlink)]
[InlineData("strikethrough", Decoration.Strikethrough)]
public void Should_Parse_Decoration(string text, Decoration decoration)
{
// Given, When
var result = Style.TryParse(text, out var style);
// Then
result.ShouldBeTrue();
style.ShouldNotBeNull();
style.Decoration.ShouldBe(decoration);
style.Decoration.ShouldBe(Decoration.Bold);
}
[Fact]
public void Should_Parse_Text_And_Decoration()
public void Should_Return_False_If_Parsing_Failed()
{
// Given, When
var result = Style.TryParse("bold underline blue on green", out var style);
// Then
result.ShouldBeTrue();
style.ShouldNotBeNull();
style.Decoration.ShouldBe(Decoration.Bold | Decoration.Underline);
style.Foreground.ShouldBe(Color.Blue);
style.Background.ShouldBe(Color.Green);
}
[Fact]
public void Should_Parse_Background_If_Foreground_Is_Set_To_Default()
{
// Given, When
var result = Style.TryParse("default on green", out var style);
// Then
result.ShouldBeTrue();
style.ShouldNotBeNull();
style.Decoration.ShouldBe(Decoration.None);
style.Foreground.ShouldBe(Color.Default);
style.Background.ShouldBe(Color.Green);
}
[Fact]
public void Should_Throw_If_Foreground_Is_Set_Twice()
{
// Given, When
var result = Style.TryParse("green yellow", out _);
// Then
result.ShouldBeFalse();
}
[Fact]
public void Should_Throw_If_Background_Is_Set_Twice()
{
// Given, When
var result = Style.TryParse("green on blue yellow", out _);
// Then
result.ShouldBeFalse();
}
[Fact]
public void Should_Throw_If_Color_Name_Could_Not_Be_Found()
{
// Given, When
var result = Style.TryParse("bold lol", out _);
// Then
result.ShouldBeFalse();
}
[Fact]
public void Should_Throw_If_Background_Color_Name_Could_Not_Be_Found()
{
// Given, When
var result = Style.TryParse("blue on lol", out _);
var result = Style.TryParse("lol", out _);
// Then
result.ShouldBeFalse();

53
src/Spectre.Console/Internal/Text/StyleParser.cs
View File

@ -57,16 +57,22 @@ namespace Spectre.Console.Internal
var color = ColorTable.GetColor(part);
if (color == null)
{
if (!foreground)
if (part.StartsWith("#", StringComparison.OrdinalIgnoreCase))
{
error = $"Could not find color '{part}'.";
color = ParseHexColor(part, out error);
if (!string.IsNullOrWhiteSpace(error))
{
return null;
}
}
else
{
error = $"Could not find color or style '{part}'.";
}
error = !foreground
? $"Could not find color '{part}'."
: $"Could not find color or style '{part}'.";
return null;
return null;
}
}
if (foreground)
@ -95,5 +101,42 @@ namespace Spectre.Console.Internal
error = null;
return new Style(effectiveForeground, effectiveBackground, effectiveDecoration);
}
private static Color? ParseHexColor(string hex, out string error)
{
error = null;
hex = hex ?? string.Empty;
hex = hex.Replace("#", string.Empty).Trim();
try
{
if (!string.IsNullOrWhiteSpace(hex))
{
if (hex.Length == 6)
{
return new Color(
(byte)Convert.ToUInt32(hex.Substring(0, 2), 16),
(byte)Convert.ToUInt32(hex.Substring(2, 2), 16),
(byte)Convert.ToUInt32(hex.Substring(4, 2), 16));
}
else if (hex.Length == 3)
{
return new Color(
(byte)Convert.ToUInt32(new string(hex[0], 2), 16),
(byte)Convert.ToUInt32(new string(hex[1], 2), 16),
(byte)Convert.ToUInt32(new string(hex[2], 2), 16));
}
}
}
catch (Exception ex)
{
error = $"Invalid hex color '#{hex}'. {ex.Message}";
return null;
}
error = $"Invalid hex color '#{hex}'.";
return null;
}
}
}