/* * Copyright (c) Contributors, http://opensimulator.org/ * See CONTRIBUTORS.TXT for a full list of copyright holders. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * * Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * Neither the name of the OpenSimulator Project nor the * names of its contributors may be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ using System; using System.Collections.Generic; using System.Diagnostics; using System.Reflection; using System.Text; using System.Text.RegularExpressions; using System.Threading; using log4net; namespace OpenSim.Framework.Console { /// /// A console that uses cursor control and color /// public class LocalConsole : CommandConsole { // private static readonly ILog m_log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType); // private readonly object m_syncRoot = new object(); private const string LOGLEVEL_NONE = "(none)"; private int y = -1; private int cp = 0; private int h = 1; private StringBuilder cmdline = new StringBuilder(); private bool echo = true; private List history = new List(); private static readonly ConsoleColor[] Colors = { // the dark colors don't seem to be visible on some black background terminals like putty :( //ConsoleColor.DarkBlue, //ConsoleColor.DarkGreen, //ConsoleColor.DarkCyan, //ConsoleColor.DarkMagenta, //ConsoleColor.DarkYellow, ConsoleColor.Gray, //ConsoleColor.DarkGray, ConsoleColor.Blue, ConsoleColor.Green, ConsoleColor.Cyan, ConsoleColor.Magenta, ConsoleColor.Yellow }; private static ConsoleColor DeriveColor(string input) { // it is important to do Abs, hash values can be negative return Colors[(Math.Abs(input.ToUpper().GetHashCode()) % Colors.Length)]; } public LocalConsole(string defaultPrompt) : base(defaultPrompt) { } private void AddToHistory(string text) { while (history.Count >= 100) history.RemoveAt(0); history.Add(text); } /// /// Set the cursor row. /// /// /// /// Row to set. If this is below 0, then the row is set to 0. If it is equal to the buffer height or greater /// then it is set to one less than the height. /// /// /// The new cursor row. /// private int SetCursorTop(int top) { // From at least mono 2.4.2.3, window resizing can give mono an invalid row and column values. If we try // to set a cursor row position with a currently invalid column, mono will throw an exception. // Therefore, we need to make sure that the column position is valid first. int left = System.Console.CursorLeft; if (left < 0) { System.Console.CursorLeft = 0; } else { int bw = System.Console.BufferWidth; // On Mono 2.4.2.3 (and possibly above), the buffer value is sometimes erroneously zero (Mantis 4657) if (bw > 0 && left >= bw) System.Console.CursorLeft = bw - 1; } if (top < 0) { top = 0; } else { int bh = System.Console.BufferHeight; // On Mono 2.4.2.3 (and possibly above), the buffer value is sometimes erroneously zero (Mantis 4657) if (bh > 0 && top >= bh) top = bh - 1; } System.Console.CursorTop = top; return top; } /// /// Set the cursor column. /// /// /// /// Column to set. If this is below 0, then the column is set to 0. If it is equal to the buffer width or greater /// then it is set to one less than the width. /// /// /// The new cursor column. /// private int SetCursorLeft(int left) { // From at least mono 2.4.2.3, window resizing can give mono an invalid row and column values. If we try // to set a cursor column position with a currently invalid row, mono will throw an exception. // Therefore, we need to make sure that the row position is valid first. int top = System.Console.CursorTop; if (top < 0) { System.Console.CursorTop = 0; } else { int bh = System.Console.BufferHeight; // On Mono 2.4.2.3 (and possibly above), the buffer value is sometimes erroneously zero (Mantis 4657) if (bh > 0 && top >= bh) System.Console.CursorTop = bh - 1; } if (left < 0) { left = 0; } else { int bw = System.Console.BufferWidth; // On Mono 2.4.2.3 (and possibly above), the buffer value is sometimes erroneously zero (Mantis 4657) if (bw > 0 && left >= bw) left = bw - 1; } System.Console.CursorLeft = left; return left; } private void Show() { lock (cmdline) { if (y == -1 || System.Console.BufferWidth == 0) return; int xc = prompt.Length + cp; int new_x = xc % System.Console.BufferWidth; int new_y = y + xc / System.Console.BufferWidth; int end_y = y + (cmdline.Length + prompt.Length) / System.Console.BufferWidth; if (end_y / System.Console.BufferWidth >= h) h++; if (end_y >= System.Console.BufferHeight) // wrap { y--; new_y--; SetCursorLeft(0); SetCursorTop(System.Console.BufferHeight - 1); System.Console.WriteLine(" "); } y = SetCursorTop(y); SetCursorLeft(0); if (echo) System.Console.Write("{0}{1}", prompt, cmdline); else System.Console.Write("{0}", prompt); SetCursorTop(new_y); SetCursorLeft(new_x); } } public override void LockOutput() { Monitor.Enter(cmdline); try { if (y != -1) { y = SetCursorTop(y); System.Console.CursorLeft = 0; int count = cmdline.Length + prompt.Length; while (count-- > 0) System.Console.Write(" "); y = SetCursorTop(y); SetCursorLeft(0); } } catch (Exception) { } } public override void UnlockOutput() { if (y != -1) { y = System.Console.CursorTop; Show(); } Monitor.Exit(cmdline); } private void WriteColorText(ConsoleColor color, string sender) { try { lock (this) { try { System.Console.ForegroundColor = color; System.Console.Write(sender); System.Console.ResetColor(); } catch (ArgumentNullException) { // Some older systems dont support coloured text. System.Console.WriteLine(sender); } } } catch (ObjectDisposedException) { } } private void WriteLocalText(string text, string level) { string outText = text; if (level != LOGLEVEL_NONE) { string regex = @"^(?.*?)\[(?[^\]]+)\]:?(?.*)"; Regex RE = new Regex(regex, RegexOptions.Multiline); MatchCollection matches = RE.Matches(text); if (matches.Count == 1) { outText = matches[0].Groups["End"].Value; System.Console.Write(matches[0].Groups["Front"].Value); System.Console.Write("["); WriteColorText(DeriveColor(matches[0].Groups["Category"].Value), matches[0].Groups["Category"].Value); System.Console.Write("]:"); } } if (level == "error") WriteColorText(ConsoleColor.Red, outText); else if (level == "warn") WriteColorText(ConsoleColor.Yellow, outText); else System.Console.Write(outText); System.Console.WriteLine(); } public override void Output(string text) { Output(text, LOGLEVEL_NONE); } public override void Output(string text, string level) { lock (cmdline) { if (y == -1) { WriteLocalText(text, level); return; } y = SetCursorTop(y); SetCursorLeft(0); int count = cmdline.Length + prompt.Length; while (count-- > 0) System.Console.Write(" "); y = SetCursorTop(y); SetCursorLeft(0); WriteLocalText(text, level); y = System.Console.CursorTop; Show(); } } private bool ContextHelp() { string[] words = Parser.Parse(cmdline.ToString()); bool trailingSpace = cmdline.ToString().EndsWith(" "); // Allow ? through while typing a URI // if (words.Length > 0 && words[words.Length-1].StartsWith("http") && !trailingSpace) return false; string[] opts = Commands.FindNextOption(words, trailingSpace); if (opts[0].StartsWith("Command help:")) Output(opts[0]); else Output(String.Format("Options: {0}", String.Join(" ", opts))); return true; } public override string ReadLine(string p, bool isCommand, bool e) { h = 1; cp = 0; prompt = p; echo = e; int historyLine = history.Count; SetCursorLeft(0); // Needed for mono System.Console.Write(" "); // Needed for mono lock (cmdline) { y = System.Console.CursorTop; cmdline.Remove(0, cmdline.Length); } while (true) { Show(); ConsoleKeyInfo key = System.Console.ReadKey(true); char c = key.KeyChar; if (!Char.IsControl(c)) { if (cp >= 318) continue; if (c == '?' && isCommand) { if (ContextHelp()) continue; } cmdline.Insert(cp, c); cp++; } else { switch (key.Key) { case ConsoleKey.Backspace: if (cp == 0) break; cmdline.Remove(cp-1, 1); cp--; SetCursorLeft(0); y = SetCursorTop(y); System.Console.Write("{0}{1} ", prompt, cmdline); break; case ConsoleKey.End: cp = cmdline.Length; break; case ConsoleKey.Home: cp = 0; break; case ConsoleKey.UpArrow: if (historyLine < 1) break; historyLine--; LockOutput(); cmdline.Remove(0, cmdline.Length); cmdline.Append(history[historyLine]); cp = cmdline.Length; UnlockOutput(); break; case ConsoleKey.DownArrow: if (historyLine >= history.Count) break; historyLine++; LockOutput(); if (historyLine == history.Count) { cmdline.Remove(0, cmdline.Length); } else { cmdline.Remove(0, cmdline.Length); cmdline.Append(history[historyLine]); } cp = cmdline.Length; UnlockOutput(); break; case ConsoleKey.LeftArrow: if (cp > 0) cp--; break; case ConsoleKey.RightArrow: if (cp < cmdline.Length) cp++; break; case ConsoleKey.Enter: SetCursorLeft(0); y = SetCursorTop(y); System.Console.WriteLine(); //Show(); lock (cmdline) { y = -1; } string commandLine = cmdline.ToString(); if (isCommand) { string[] cmd = Commands.Resolve(Parser.Parse(commandLine)); if (cmd.Length != 0) { int i; for (i=0 ; i < cmd.Length ; i++) { if (cmd[i].Contains(" ")) cmd[i] = "\"" + cmd[i] + "\""; } AddToHistory(String.Join(" ", cmd)); return String.Empty; } } // If we're not echoing to screen (e.g. a password) then we probably don't want it in history if (echo && commandLine != "") AddToHistory(commandLine); return cmdline.ToString(); default: break; } } } } } }