Meine Lösung für Aufgabenblatt 2

dummyclient_manuel/Terminal.cs

@@ -0,0 +1,91 @@
+using System;
+using System.Threading;
+
+public class Terminal
+{
+	private Object TerminalLock = new Object ();
+	private Object ReadLineLock = new Object ();
+	private AutoResetEvent ResetEvent = new AutoResetEvent(false);
+	private String InputBuffer = "";
+	private bool AcceptInput = false;
+	private int OutLinePos;
+
+	public Terminal ()
+	{
+		OutLinePos = Console.CursorTop;
+		Thread catchInputThread = new Thread(new ThreadStart(this.CatchInput));
+		catchInputThread.Start ();
+	}
+
+	private void CatchInput ()
+	{
+		while (true) {
+			ConsoleKeyInfo key = Console.ReadKey (false);
+			lock (TerminalLock) {
+				if (!AcceptInput)
+				{
+					Console.CursorLeft--;
+					Console.Write(" ");
+					Console.CursorLeft--;
+					continue;
+				}
+				if (key.Key == ConsoleKey.Backspace)
+				{
+					if (InputBuffer.Length == 0)
+						continue;
+					InputBuffer = InputBuffer.Substring(0, InputBuffer.Length - 1);
+					ClearInputLine ();
+					Console.Write (InputBuffer);
+				}
+				else if (key.Key == ConsoleKey.Enter)
+				{
+					AcceptInput = false;
+					ResetEvent.Set ();
+					OutLinePos = Console.CursorTop;
+				}
+				else
+				{
+					InputBuffer += key.KeyChar;
+					ClearInputLine ();
+					Console.Write (InputBuffer);
+				}
+			}
+		}
+	}
+
+	public void PrintLine (String s)
+	{
+		lock (TerminalLock) {
+			ClearInputLine();
+			Console.WriteLine (s);
+			OutLinePos = Console.CursorTop;
+			Console.Write (InputBuffer);
+		}
+	}
+
+	public String ReadLine ()
+	{
+		lock (ReadLineLock) {
+			String result;
+			AcceptInput = true;
+			ResetEvent.WaitOne();
+			result = InputBuffer;
+			InputBuffer = "";
+			return result;
+		}
+	}
+
+	public void ClearInputLine ()
+	{
+		lock (TerminalLock) {
+			int top = Console.CursorTop;
+			int left = Console.CursorLeft;
+			Console.SetCursorPosition (0, OutLinePos);
+			while (left != Console.CursorLeft || top != Console.CursorTop) {
+				Console.Write (" ");
+			}
+			Console.SetCursorPosition (0, OutLinePos);
+		}
+	}
+}
+