sbarisic/HTMLog.cs

## HTMLog.cs
using System;
using System.Globalization;
using System.IO;
using System.Text;
using System.Web;

namespace HTMLog {
	public class LogFile : IDisposable {
		readonly string Prologue = @"<!DOCTYPE html><html><head><title>HTMLog</title>
<link rel=""stylesheet"" href=""//cdn.jsdelivr.net/npm/hack-font@3/build/web/hack.css"">
<style>
:root { --dark-bg: rgb(30, 30, 30); --light-bg: rgb(35, 35, 35); }
body {
	font-family: Hack, monospace; background-color: var(--dark-bg); color: white;
	margin-top: 0px; margin-left: 0px; margin-bottom: 0px; margin-right: 0px;
	line-height: 1em; height: 2em; width: 100%;  white-space: pre;
	background: linear-gradient(var(--dark-bg), var(--dark-bg) 1em, var(--light-bg) 0, var(--light-bg) 2em);
}
p { display: inline; }
div { top: 0%; left: 0%; bottom: 100%; right: 100%; }
a:link { color: rgb(20, 150, 150); }
a:visited { color: rgb(30, 80, 90); }
a:hover { color: rgb(30, 190, 220); }
a:active { color: rgb(30, 190, 255); }
" + "</style></head><body>\n";

		readonly string Epilogue = "</body></html>\n";

		StreamWriter OutWriter;
		Stream OutStream;
		bool OwnsOutStream;
		int LeftPos;

		public byte R, G, B;

		public LogFile(Stream OutStream) {
			OwnsOutStream = false;
			Init(OutStream);
		}

		public LogFile(string FileName) {
			OwnsOutStream = true;
			FileStream FS = File.Open(FileName, FileMode.OpenOrCreate, FileAccess.ReadWrite);
			Init(FS);
		}

		public void Dispose() {
			OutWriter.Dispose();

			if (OwnsOutStream)
				OutStream?.Dispose();
		}

		void Init(Stream OutStream) {
			R = G = B = 255;

			this.OutStream = OutStream;
			OutWriter = new StreamWriter(OutStream, Encoding.UTF8, 1024, true);

			if (OutStream.Length <= Prologue.Length) {
				OutStream.Seek(0, SeekOrigin.Begin);
				WriteRaw(Prologue);
			} else
				OutStream.Seek(-Epilogue.Length, SeekOrigin.End);
		}

		void Flush() {
			OutWriter.Flush();
			OutStream.Flush();
		}

		void WriteRaw(string Msg) {
			OutWriter.Write(Msg);
			OutWriter.Write(Epilogue);
			Flush();
			OutStream.Seek(-Epilogue.Length, SeekOrigin.End);
		}

		void WriteRaw(string Fmt, params object[] Args) {
			WriteRaw(string.Format(CultureInfo.InvariantCulture, Fmt, Args));
		}

		string MessageTag(string Txt) {
			return string.Format("<p style=\"color: #{1:x2}{2:x2}{3:x2};\">{0}</p>", Escape(Txt), R, G, B);
		}

		string LinkTag(string Msg, string LinkTo) {
			return string.Format("<a href=\"{0}\" target=\"_blank\">{1}</a>", LinkTo, Escape(Msg));
		}

		string Escape(string Str) {
			return System.Security.SecurityElement.Escape(Str);
		}

		public void Write(string Msg) {
			LeftPos += Msg.Length;
			WriteRaw(MessageTag(Msg));
		}

		public void Write(byte R, byte G, byte B, string Msg) {
			this.R = R;
			this.G = G;
			this.B = B;
			Write(Msg);
		}

		public void Write(string Fmt, params object[] Args) {
			Write(string.Format(Fmt, Args));
		}

		public void WriteLine(byte R, byte G, byte B, string Msg) {
			this.R = R;
			this.G = G;
			this.B = B;
			WriteLine(Msg);
		}

		public void WriteLine(string Msg = null) {
			if (Msg != null)
				WriteRaw(MessageTag(Msg));

			WriteRaw("\n");
			//WriteRaw("</br>\n");
			LeftPos = 0;
		}

		public void WriteLink(string Msg, string LinkTo) {
			LeftPos += Msg.Length;
			WriteRaw(LinkTag(Msg, LinkTo));
		}

		public void Tab(int Pos, char Chr = ' ') {
			if (LeftPos >= Pos)
				return;

			Write(new string(Chr, Pos - LeftPos));
		}

		public void SetColor(byte R, byte G, byte B) {
			this.R = R;
			this.G = G;
			this.B = B;
		}
	}
}
	using System;
	using System.Globalization;
	using System.IO;
	using System.Text;
	using System.Web;

	namespace HTMLog {
	public class LogFile : IDisposable {
	readonly string Prologue = @"<!DOCTYPE html><html><head><title>HTMLog</title>
	<link rel=""stylesheet"" href=""//cdn.jsdelivr.net/npm/hack-font@3/build/web/hack.css"">
	<style>
	:root { --dark-bg: rgb(30, 30, 30); --light-bg: rgb(35, 35, 35); }
	body {
	font-family: Hack, monospace; background-color: var(--dark-bg); color: white;
	margin-top: 0px; margin-left: 0px; margin-bottom: 0px; margin-right: 0px;
	line-height: 1em; height: 2em; width: 100%; white-space: pre;
	background: linear-gradient(var(--dark-bg), var(--dark-bg) 1em, var(--light-bg) 0, var(--light-bg) 2em);
	}
	p { display: inline; }
	div { top: 0%; left: 0%; bottom: 100%; right: 100%; }
	a:link { color: rgb(20, 150, 150); }
	a:visited { color: rgb(30, 80, 90); }
	a:hover { color: rgb(30, 190, 220); }
	a:active { color: rgb(30, 190, 255); }
	" + "</style></head><body>\n";

	readonly string Epilogue = "</body></html>\n";

	StreamWriter OutWriter;
	Stream OutStream;
	bool OwnsOutStream;
	int LeftPos;

	public byte R, G, B;

	public LogFile(Stream OutStream) {
	OwnsOutStream = false;
	Init(OutStream);
	}

	public LogFile(string FileName) {
	OwnsOutStream = true;
	FileStream FS = File.Open(FileName, FileMode.OpenOrCreate, FileAccess.ReadWrite);
	Init(FS);
	}

	public void Dispose() {
	OutWriter.Dispose();

	if (OwnsOutStream)
	OutStream?.Dispose();
	}

	void Init(Stream OutStream) {
	R = G = B = 255;

	this.OutStream = OutStream;
	OutWriter = new StreamWriter(OutStream, Encoding.UTF8, 1024, true);

	if (OutStream.Length <= Prologue.Length) {
	OutStream.Seek(0, SeekOrigin.Begin);
	WriteRaw(Prologue);
	} else
	OutStream.Seek(-Epilogue.Length, SeekOrigin.End);
	}

	void Flush() {
	OutWriter.Flush();
	OutStream.Flush();
	}

	void WriteRaw(string Msg) {
	OutWriter.Write(Msg);
	OutWriter.Write(Epilogue);
	Flush();
	OutStream.Seek(-Epilogue.Length, SeekOrigin.End);
	}

	void WriteRaw(string Fmt, params object[] Args) {
	WriteRaw(string.Format(CultureInfo.InvariantCulture, Fmt, Args));
	}

	string MessageTag(string Txt) {
	return string.Format("<p style=\"color: #{1:x2}{2:x2}{3:x2};\">{0}</p>", Escape(Txt), R, G, B);
	}

	string LinkTag(string Msg, string LinkTo) {
	return string.Format("<a href=\"{0}\" target=\"_blank\">{1}</a>", LinkTo, Escape(Msg));
	}

	string Escape(string Str) {
	return System.Security.SecurityElement.Escape(Str);
	}

	public void Write(string Msg) {
	LeftPos += Msg.Length;
	WriteRaw(MessageTag(Msg));
	}

	public void Write(byte R, byte G, byte B, string Msg) {
	this.R = R;
	this.G = G;
	this.B = B;
	Write(Msg);
	}

	public void Write(string Fmt, params object[] Args) {
	Write(string.Format(Fmt, Args));
	}

	public void WriteLine(byte R, byte G, byte B, string Msg) {
	this.R = R;
	this.G = G;
	this.B = B;
	WriteLine(Msg);
	}

	public void WriteLine(string Msg = null) {
	if (Msg != null)
	WriteRaw(MessageTag(Msg));

	WriteRaw("\n");
	//WriteRaw("</br>\n");
	LeftPos = 0;
	}

	public void WriteLink(string Msg, string LinkTo) {
	LeftPos += Msg.Length;
	WriteRaw(LinkTag(Msg, LinkTo));
	}

	public void Tab(int Pos, char Chr = ' ') {
	if (LeftPos >= Pos)
	return;

	Write(new string(Chr, Pos - LeftPos));
	}

	public void SetColor(byte R, byte G, byte B) {
	this.R = R;
	this.G = G;
	this.B = B;
	}
	}
	}