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Add method to write VT/ANSI control codes

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Adds a new extension method IAnsiConsole.WriteAnsi that writes
VT/ANSI control codes to the console. If VT/ANSI control codes are
not supported, nothing will be written.
This commit is contained in:
Patrik Svensson
2021-04-22 22:11:21 +02:00
committed by Phil Scott
parent 91f910326c
commit 3463dde543
14 changed files with 212 additions and 101 deletions
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12
src/Spectre.Console.Testing/TestConsoleExtensions.cs
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@@ -17,6 +17,18 @@ namespace Spectre.Console.Testing
return console;
}
/// <summary>
/// Sets whether or not ANSI is supported.
/// </summary>
/// <param name="console">The console.</param>
/// <param name="enable">Whether or not VT/ANSI control codes are supported.</param>
/// <returns>The same instance so that multiple calls can be chained.</returns>
public static TestConsole SupportsAnsi(this TestConsole console, bool enable)
{
console.Profile.Capabilities.Ansi = enable;
return console;
}
/// <summary>
/// Makes the console interactive.
/// </summary>

47
src/Spectre.Console.Tests/Unit/AnsiConsoleTests.Advanced.cs Normal file
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@@ -0,0 +1,47 @@
using Shouldly;
using Spectre.Console.Advanced;
using Spectre.Console.Testing;
using Xunit;
namespace Spectre.Console.Tests.Unit
{
public partial class AnsiConsoleTests
{
public sealed class Advanced
{
[Fact]
public void Should_Write_Ansi_Codes_To_Console_If_Supported()
{
// Given
var console = new TestConsole()
.SupportsAnsi(true)
.Colors(ColorSystem.Standard)
.EmitAnsiSequences();
// When
console.WriteAnsi("Hello");
// Then
console.Output.NormalizeLineEndings()
.ShouldBe("Hello");
}
[Fact]
public void Should_Not_Write_Ansi_Codes_To_Console_If_Not_Supported()
{
// Given
var console = new TestConsole()
.SupportsAnsi(false)
.Colors(ColorSystem.Standard)
.EmitAnsiSequences();
// When
console.WriteAnsi("Hello");
// Then
console.Output.NormalizeLineEndings()
.ShouldBeEmpty();
}
}
}
}

166
src/Spectre.Console.Tests/Unit/AnsiConsoleTests.cs
View File

@@ -7,103 +7,109 @@ namespace Spectre.Console.Tests.Unit
{
public partial class AnsiConsoleTests
{
[Theory]
[InlineData(false, "HelloWorld")]
[InlineData(true, "HelloWorld")]
public void Should_Clear_Screen(bool home, string expected)
public sealed class Clear
{
// Given
var console = new TestConsole()
.Colors(ColorSystem.Standard)
.EmitAnsiSequences();
[Theory]
[InlineData(false, "HelloWorld")]
[InlineData(true, "HelloWorld")]
public void Should_Clear_Screen(bool home, string expected)
{
// Given
var console = new TestConsole()
.Colors(ColorSystem.Standard)
.EmitAnsiSequences();
// When
console.Write("Hello");
console.Clear(home);
console.Write("World");
// When
console.Write("Hello");
console.Clear(home);
console.Write("World");
// Then
console.Output.ShouldBe(expected);
// Then
console.Output.ShouldBe(expected);
}
}
[Fact]
public void Should_Combine_Decoration_And_Colors()
public sealed class Write
{
// Given
var console = new TestConsole()
.Colors(ColorSystem.Standard)
.EmitAnsiSequences();
[Fact]
public void Should_Combine_Decoration_And_Colors()
{
// Given
var console = new TestConsole()
.Colors(ColorSystem.Standard)
.EmitAnsiSequences();
// When
console.Write(
"Hello",
new Style()
.Foreground(Color.RoyalBlue1)
.Background(Color.NavajoWhite1)
.Decoration(Decoration.Italic));
// When
console.Write(
"Hello",
new Style()
.Foreground(Color.RoyalBlue1)
.Background(Color.NavajoWhite1)
.Decoration(Decoration.Italic));
// Then
console.Output.ShouldBe("\u001b[3;90;47mHello\u001b[0m");
}
// Then
console.Output.ShouldBe("\u001b[3;90;47mHello\u001b[0m");
}
[Fact]
public void Should_Not_Include_Foreground_If_Set_To_Default_Color()
{
// Given
var console = new TestConsole()
.Colors(ColorSystem.Standard)
.EmitAnsiSequences();
[Fact]
public void Should_Not_Include_Foreground_If_Set_To_Default_Color()
{
// Given
var console = new TestConsole()
.Colors(ColorSystem.Standard)
.EmitAnsiSequences();
// When
console.Write(
"Hello",
new Style()
.Foreground(Color.Default)
.Background(Color.NavajoWhite1)
.Decoration(Decoration.Italic));
// When
console.Write(
"Hello",
new Style()
.Foreground(Color.Default)
.Background(Color.NavajoWhite1)
.Decoration(Decoration.Italic));
// Then
console.Output.ShouldBe("\u001b[3;47mHello\u001b[0m");
}
// Then
console.Output.ShouldBe("\u001b[3;47mHello\u001b[0m");
}
[Fact]
public void Should_Not_Include_Background_If_Set_To_Default_Color()
{
// Given
var console = new TestConsole()
.Colors(ColorSystem.Standard)
.EmitAnsiSequences();
[Fact]
public void Should_Not_Include_Background_If_Set_To_Default_Color()
{
// Given
var console = new TestConsole()
.Colors(ColorSystem.Standard)
.EmitAnsiSequences();
// When
console.Write(
"Hello",
new Style()
.Foreground(Color.RoyalBlue1)
.Background(Color.Default)
.Decoration(Decoration.Italic));
// When
console.Write(
"Hello",
new Style()
.Foreground(Color.RoyalBlue1)
.Background(Color.Default)
.Decoration(Decoration.Italic));
// Then
console.Output.ShouldBe("\u001b[3;90mHello\u001b[0m");
}
// Then
console.Output.ShouldBe("\u001b[3;90mHello\u001b[0m");
}
[Fact]
public void Should_Not_Include_Decoration_If_Set_To_None()
{
// Given
var console = new TestConsole()
.Colors(ColorSystem.Standard)
.EmitAnsiSequences();
[Fact]
public void Should_Not_Include_Decoration_If_Set_To_None()
{
// Given
var console = new TestConsole()
.Colors(ColorSystem.Standard)
.EmitAnsiSequences();
// When
console.Write(
"Hello",
new Style()
.Foreground(Color.RoyalBlue1)
.Background(Color.NavajoWhite1)
.Decoration(Decoration.None));
// When
console.Write(
"Hello",
new Style()
.Foreground(Color.RoyalBlue1)
.Background(Color.NavajoWhite1)
.Decoration(Decoration.None));
// Then
console.Output.ShouldBe("\u001b[90;47mHello\u001b[0m");
// Then
console.Output.ShouldBe("\u001b[90;47mHello\u001b[0m");
}
}
public sealed class WriteLine

2
src/Spectre.Console/Capabilities.cs
View File

@@ -16,7 +16,7 @@ namespace Spectre.Console
/// <summary>
/// Gets or sets a value indicating whether or not
/// the console supports Ansi.
/// the console supports VT/ANSI control codes.
/// </summary>
public bool Ansi { get; set; }

28
src/Spectre.Console/Extensions/Advanced/AnsiConsoleExtensions.cs Normal file
View File

@@ -0,0 +1,28 @@
using System;
namespace Spectre.Console.Advanced
{
/// <summary>
/// Contains extension methods for <see cref="IAnsiConsole"/>.
/// </summary>
public static class AnsiConsoleExtensions
{
/// <summary>
/// Writes a VT/Ansi control code sequence to the console (if supported).
/// </summary>
/// <param name="console">The console to write to.</param>
/// <param name="sequence">The VT/Ansi control code sequence to write.</param>
public static void WriteAnsi(this IAnsiConsole console, string sequence)
{
if (console is null)
{
throw new ArgumentNullException(nameof(console));
}
if (console.Profile.Capabilities.Ansi)
{
console.Write(new ControlCode(sequence));
}
}
}
}

10
src/Spectre.Console/Extensions/AnsiConsoleExtensions.cs
View File

@@ -38,6 +38,11 @@ namespace Spectre.Console
/// <param name="text">The text to write.</param>
public static void Write(this IAnsiConsole console, string text)
{
if (console is null)
{
throw new ArgumentNullException(nameof(console));
}
console.Write(new Text(text, Style.Plain));
}
@@ -49,6 +54,11 @@ namespace Spectre.Console
/// <param name="style">The text style.</param>
public static void Write(this IAnsiConsole console, string text, Style style)
{
if (console is null)
{
throw new ArgumentNullException(nameof(console));
}
console.Write(new Text(text, style));
}

2
src/Spectre.Console/IReadOnlyCapabilities.cs
View File

@@ -14,7 +14,7 @@ namespace Spectre.Console
/// <summary>
/// Gets a value indicating whether or not
/// the console supports Ansi.
/// the console supports VT/ANSI control codes.
/// </summary>
bool Ansi { get; }

6
src/Spectre.Console/Internal/Backends/Ansi/AnsiConsoleBackend.cs
View File

@@ -22,12 +22,12 @@ namespace Spectre.Console
public void Clear(bool home)
{
Write(new ControlSequence(ED(2)));
Write(new ControlSequence(ED(3)));
Write(new ControlCode(ED(2)));
Write(new ControlCode(ED(3)));
if (home)
{
Write(new ControlSequence(CUP(1, 1)));
Write(new ControlCode(CUP(1, 1)));
}
}

14
src/Spectre.Console/Internal/Backends/Ansi/AnsiConsoleCursor.cs
View File

@@ -16,11 +16,11 @@ namespace Spectre.Console
{
if (show)
{
_backend.Write(new ControlSequence(SM(DECTCEM)));
_backend.Write(new ControlCode(SM(DECTCEM)));
}
else
{
_backend.Write(new ControlSequence(RM(DECTCEM)));
_backend.Write(new ControlCode(RM(DECTCEM)));
}
}
@@ -34,23 +34,23 @@ namespace Spectre.Console
switch (direction)
{
case CursorDirection.Up:
_backend.Write(new ControlSequence(CUU(steps)));
_backend.Write(new ControlCode(CUU(steps)));
break;
case CursorDirection.Down:
_backend.Write(new ControlSequence(CUD(steps)));
_backend.Write(new ControlCode(CUD(steps)));
break;
case CursorDirection.Right:
_backend.Write(new ControlSequence(CUF(steps)));
_backend.Write(new ControlCode(CUF(steps)));
break;
case CursorDirection.Left:
_backend.Write(new ControlSequence(CUB(steps)));
_backend.Write(new ControlCode(CUB(steps)));
break;
}
}
public void SetPosition(int column, int line)
{
_backend.Write(new ControlSequence(CUP(line, column)));
_backend.Write(new ControlCode(CUP(line, column)));
}
}
}

8
src/Spectre.Console/Rendering/LiveRenderable.cs
View File

@@ -25,11 +25,11 @@ namespace Spectre.Console.Rendering
{
if (_shape == null)
{
return new ControlSequence(string.Empty);
return new ControlCode(string.Empty);
}
var linesToMoveUp = _shape.Value.Height - 1;
return new ControlSequence("\r" + CUU(linesToMoveUp));
return new ControlCode("\r" + CUU(linesToMoveUp));
}
}
@@ -39,11 +39,11 @@ namespace Spectre.Console.Rendering
{
if (_shape == null)
{
return new ControlSequence(string.Empty);
return new ControlCode(string.Empty);
}
var linesToClear = _shape.Value.Height - 1;
return new ControlSequence("\r" + EL(2) + (CUU(1) + EL(2)).Repeat(linesToClear));
return new ControlCode("\r" + EL(2) + (CUU(1) + EL(2)).Repeat(linesToClear));
}
}

5
src/Spectre.Console/Rendering/RenderContext.cs
View File

@@ -14,6 +14,11 @@ namespace Spectre.Console.Rendering
/// </summary>
public ColorSystem ColorSystem => _capabilities.ColorSystem;
/// <summary>
/// Gets a value indicating whether or not VT/Ansi codes are supported.
/// </summary>
public bool Ansi => _capabilities.Ansi;
/// <summary>
/// Gets a value indicating whether or not unicode is supported.
/// </summary>

9
src/Spectre.Console/Widgets/ControlSequence.cs → src/Spectre.Console/Widgets/ControlCode.cs
View File

@@ -3,11 +3,11 @@ using Spectre.Console.Rendering;
namespace Spectre.Console
{
internal sealed class ControlSequence : Renderable
internal sealed class ControlCode : Renderable
{
private readonly Segment _segment;
public ControlSequence(string control)
public ControlCode(string control)
{
_segment = Segment.Control(control);
}
@@ -19,7 +19,10 @@ namespace Spectre.Console
protected override IEnumerable<Segment> Render(RenderContext context, int maxWidth)
{
yield return _segment;
if (context.Ansi)
{
yield return _segment;
}
}
}
}

2
src/Spectre.Console/Widgets/Progress/ProgressContext.cs
View File

@@ -73,7 +73,7 @@ namespace Spectre.Console
public void Refresh()
{
_renderer.Update(this);
_console.Write(new ControlSequence(string.Empty));
_console.Write(new ControlCode(string.Empty));
}
internal IReadOnlyList<ProgressTask> GetTasks()

2
src/Spectre.Console/Widgets/Prompt/Rendering/RenderableList.cs
View File

@@ -38,7 +38,7 @@ namespace Spectre.Console
public void Redraw()
{
_console.Write(new ControlSequence(string.Empty));
_console.Write(new ControlCode(string.Empty));
}
public bool Update(ConsoleKey key)