using Harmony;
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using System;
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using System.Collections.Generic;
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using System.IO;
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using System.Reflection.Emit;
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using System.Text;
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namespace IPA.Logging
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{
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internal class StdoutInterceptor : TextWriter
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{
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public override Encoding Encoding => Encoding.Default;
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private bool isStdErr;
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public override void Write(char value)
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{
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Write(value.ToString());
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}
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private string lineBuffer = "";
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private object bufferLock = new object();
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public override void Write(string value)
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{
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lock (bufferLock)
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{ // avoid threading issues
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lineBuffer += value;
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var parts = lineBuffer.Split(new[] { Environment.NewLine, "\n", "\r" }, StringSplitOptions.None);
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for (int i = 0; i < parts.Length; i++)
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{
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if (i + 1 == parts.Length) // last element
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lineBuffer = parts[i];
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else
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{
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var str = parts[i];
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if (string.IsNullOrEmpty(str)) continue;
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if (!isStdErr && WinConsole.IsInitialized)
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str = ConsoleColorToForegroundSet(currentColor) + str;
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if (isStdErr)
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Logger.stdout.Error(str);
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else
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Logger.stdout.Info(str);
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}
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}
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}
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}
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private const ConsoleColor defaultColor = ConsoleColor.Gray;
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private ConsoleColor currentColor = defaultColor;
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private static string ConsoleColorToForegroundSet(ConsoleColor col)
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{
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if (!WinConsole.UseVTEscapes) return "";
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string code = "0"; // reset
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switch (col)
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{
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case ConsoleColor.Black:
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code = "30";
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break;
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case ConsoleColor.DarkBlue:
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code = "34";
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break;
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case ConsoleColor.DarkGreen:
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code = "32";
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break;
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case ConsoleColor.DarkCyan:
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code = "36";
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break;
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case ConsoleColor.DarkRed:
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code = "31";
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break;
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case ConsoleColor.DarkMagenta:
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code = "35";
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break;
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case ConsoleColor.DarkYellow:
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code = "33";
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break;
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case ConsoleColor.Gray:
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code = "37";
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break;
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case ConsoleColor.DarkGray:
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code = "90"; // literally bright black
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break;
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case ConsoleColor.Blue:
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code = "94";
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break;
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case ConsoleColor.Green:
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code = "92";
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break;
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case ConsoleColor.Cyan:
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code = "96";
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break;
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case ConsoleColor.Red:
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code = "91";
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break;
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case ConsoleColor.Magenta:
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code = "95";
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break;
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case ConsoleColor.Yellow:
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code = "93";
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break;
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case ConsoleColor.White:
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code = "97";
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break;
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}
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return "\x1b[" + code + "m";
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}
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private static StdoutInterceptor stdoutInterceptor;
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private static StdoutInterceptor stderrInterceptor;
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private static class ConsoleHarmonyPatches
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{
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public static void Patch(HarmonyInstance harmony)
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{
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var console = typeof(Console);
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var resetColor = console.GetMethod("ResetColor");
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var foregroundProperty = console.GetProperty("ForegroundColor");
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var setFg = foregroundProperty.SetMethod;
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var getFg = foregroundProperty.GetMethod;
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harmony.Patch(resetColor, transpiler: new HarmonyMethod(typeof(ConsoleHarmonyPatches), "PatchResetColor"));
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harmony.Patch(setFg, transpiler: new HarmonyMethod(typeof(ConsoleHarmonyPatches), "PatchSetForegroundColor"));
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harmony.Patch(getFg, transpiler: new HarmonyMethod(typeof(ConsoleHarmonyPatches), "PatchGetForegroundColor"));
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}
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public static ConsoleColor GetColor() => stdoutInterceptor.currentColor;
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public static void SetColor(ConsoleColor col) => stdoutInterceptor.currentColor = col;
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public static void ResetColor() => stdoutInterceptor.currentColor = defaultColor;
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public static IEnumerable<CodeInstruction> PatchGetForegroundColor(IEnumerable<CodeInstruction> _)
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{
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var getColorM = typeof(ConsoleHarmonyPatches).GetMethod("GetColor");
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return new[] {
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new CodeInstruction(OpCodes.Call, getColorM),
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new CodeInstruction(OpCodes.Ret)
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};
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}
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public static IEnumerable<CodeInstruction> PatchSetForegroundColor(IEnumerable<CodeInstruction> _)
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{
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var setColorM = typeof(ConsoleHarmonyPatches).GetMethod("SetColor");
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return new[] {
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new CodeInstruction(OpCodes.Ldarg_0),
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new CodeInstruction(OpCodes.Call, setColorM),
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new CodeInstruction(OpCodes.Ret)
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};
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}
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public static IEnumerable<CodeInstruction> PatchResetColor(IEnumerable<CodeInstruction> _)
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{
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var resetColor = typeof(ConsoleHarmonyPatches).GetMethod("ResetColor");
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return new[] {
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new CodeInstruction(OpCodes.Call, resetColor),
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new CodeInstruction(OpCodes.Ret)
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};
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}
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}
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private static HarmonyInstance harmony;
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private static bool usingInterceptor = false;
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public static void Intercept()
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{
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if (!usingInterceptor)
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{
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usingInterceptor = true;
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if (harmony == null)
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harmony = HarmonyInstance.Create("BSIPA Console Redirector Patcher");
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if (stdoutInterceptor == null)
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stdoutInterceptor = new StdoutInterceptor();
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if (stderrInterceptor == null)
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stderrInterceptor = new StdoutInterceptor() { isStdErr = true };
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RedirectConsole();
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ConsoleHarmonyPatches.Patch(harmony);
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}
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}
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public static void RedirectConsole()
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{
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if (usingInterceptor)
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{
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Console.SetOut(stdoutInterceptor);
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Console.SetError(stderrInterceptor);
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}
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}
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}
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}
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