145 lines
5.1 KiB
C#
145 lines
5.1 KiB
C#
// Copyright (c) .NET Foundation and contributors. All rights reserved.
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// Licensed under the MIT license. See LICENSE file in the project root for full license information.
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using System;
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using System.IO;
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namespace Microsoft.DotNet.Cli.Build.Framework
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{
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public class AnsiConsole
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{
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private AnsiConsole(TextWriter writer)
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{
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Writer = writer;
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OriginalForegroundColor = Console.ForegroundColor;
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}
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private int _boldRecursion;
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public static AnsiConsole GetOutput()
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{
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return new AnsiConsole(Console.Out);
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}
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public static AnsiConsole GetError()
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{
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return new AnsiConsole(Console.Error);
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}
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public TextWriter Writer { get; }
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public ConsoleColor OriginalForegroundColor { get; }
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private void SetColor(ConsoleColor color)
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{
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const int Light = 0x08;
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int c = (int)color;
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Console.ForegroundColor =
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c < 0 ? color : // unknown, just use it
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_boldRecursion > 0 ? (ConsoleColor)(c | Light) : // ensure color is light
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(ConsoleColor)(c & ~Light); // ensure color is dark
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}
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private void SetBold(bool bold)
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{
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_boldRecursion += bold ? 1 : -1;
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if (_boldRecursion > 1 || (_boldRecursion == 1 && !bold))
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{
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return;
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}
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// switches on _boldRecursion to handle boldness
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SetColor(Console.ForegroundColor);
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}
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public void WriteLine(string message)
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{
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Write(message);
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Writer.WriteLine();
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}
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public void Write(string message)
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{
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var escapeScan = 0;
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for (;;)
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{
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var escapeIndex = message.IndexOf("\x1b[", escapeScan, StringComparison.Ordinal);
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if (escapeIndex == -1)
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{
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var text = message.Substring(escapeScan);
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Writer.Write(text);
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break;
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}
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else
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{
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var startIndex = escapeIndex + 2;
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var endIndex = startIndex;
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while (endIndex != message.Length &&
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message[endIndex] >= 0x20 &&
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message[endIndex] <= 0x3f)
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{
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endIndex += 1;
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}
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var text = message.Substring(escapeScan, escapeIndex - escapeScan);
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Writer.Write(text);
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if (endIndex == message.Length)
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{
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break;
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}
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switch (message[endIndex])
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{
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case 'm':
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int value;
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if (int.TryParse(message.Substring(startIndex, endIndex - startIndex), out value))
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{
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switch (value)
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{
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case 1:
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SetBold(true);
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break;
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case 22:
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SetBold(false);
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break;
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case 30:
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SetColor(ConsoleColor.Black);
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break;
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case 31:
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SetColor(ConsoleColor.Red);
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break;
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case 32:
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SetColor(ConsoleColor.Green);
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break;
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case 33:
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SetColor(ConsoleColor.Yellow);
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break;
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case 34:
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SetColor(ConsoleColor.Blue);
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break;
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case 35:
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SetColor(ConsoleColor.Magenta);
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break;
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case 36:
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SetColor(ConsoleColor.Cyan);
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break;
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case 37:
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SetColor(ConsoleColor.Gray);
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break;
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case 39:
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Console.ForegroundColor = OriginalForegroundColor;
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break;
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}
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}
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break;
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}
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escapeScan = endIndex + 1;
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}
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}
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}
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}
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}
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