/// <summary>
/// Gets the contents of the operator's clipboard via a rather hacky reference to System.Windows.Clipboard and managed threads.<para/>
/// TODO: See if there is a better way to access the user clipboard on Windows 7.
/// </summary>
/// <returns>The text on the operator's Clipboard.</returns>
private static string GetClipboard()
{
//This, unfortunately, needs to go through a lot of hoops to work.
//https://stackoverflow.com/questions/518701/clipboard-gettext-returns-null-empty-string
string resultString = null;
//IDataObject idat = null;
Thread STAThread = new Thread(
delegate()
{
try
{
resultString = Clipboard.GetText();
//idat = Clipboard.GetDataObject();
}
catch (Exception ex)
{
XanBotLogger.WriteException(ex);
}
}
);
STAThread.SetApartmentState(ApartmentState.STA);
STAThread.Start();
STAThread.Join();
//resultString = idat.GetData(DataFormats.UnicodeText, true).ToString();
if (resultString?.Length == 0)
{
return(null);
}
return(resultString);
}
/// <summary>
/// Starts the update console task, which handles console input.
/// </summary>
/// <returns></returns>
public static void StartUpdateConsoleTask()
{
try
{
Task.Run(() =>
{
while (!XanBotCoreSystem.WantsToExit)
{
UpdateConsole();
}
});
}
catch (Exception ex)
{
// Will probably be a TaskCanceledException
XanBotLogger.WriteException(ex);
XanBotCoreSystem.Exit(1);
}
}
/// <summary>
/// Should be called from a while loop in the bot's core thread.<para/>
/// This runs an update cycle on the console, which listens for operator input and updates display based on said input, and initiates commands if the user presses return in the console.
/// </summary>
private static void UpdateConsole()
{
CurrentlyTypedConsoleText = "";
Console.ForegroundColor = ConsoleColor.Cyan;
ConsoleKeyInfo kInfo = Console.ReadKey(false);
char c = kInfo.KeyChar;
while (c != '\n' && c != '\r')
{
// Didn't press enter.
// Up arrow. Go up one in the command cache if possible.
if (kInfo.Key == ConsoleKey.UpArrow)
{
CommandCachePosition = Math.Max(CommandCachePosition - 1, 0);
CurrentlyTypedConsoleText = CommandCache[CommandCachePosition];
Console.CursorLeft = 0;
Console.Write(new string(' ', Console.BufferWidth - 1));
Console.CursorLeft = 0;
Console.Write(CurrentlyTypedConsoleText);
}
// Down arrow. Go down one in the command cache if possible, or display empty text. To do: Make it display whatever was there if we typed something, hit up, then hit down again.
else if (kInfo.Key == ConsoleKey.DownArrow)
{
if (CommandCachePosition + 1 == CommandCache.Count)
{
//We'd be going after the last index.
CurrentlyTypedConsoleText = "";
}
else
{
CurrentlyTypedConsoleText = CommandCache[CommandCachePosition + 1];
}
CommandCachePosition = Math.Min(CommandCachePosition + 1, CommandCache.Count - 1);
Console.CursorLeft = 0;
Console.Write(new string(' ', Console.BufferWidth - 1));
Console.CursorLeft = 0;
Console.Write(CurrentlyTypedConsoleText);
}
// Backspace. Erase text.
if (c == '\b')
{
if (CurrentlyTypedConsoleText.Length > 0)
{
//Backspace. Remove the char.
Console.SetOut(CONSOLE_WRITER);
Console.CursorLeft = Math.Max(Console.CursorLeft - 1, 0);
Console.Write(' ');
Console.CursorLeft = 0;
CurrentlyTypedConsoleText = CurrentlyTypedConsoleText.Substring(0, CurrentlyTypedConsoleText.Length - 1);
Console.Write(new string(' ', Console.BufferWidth - 1));
Console.CursorLeft = 0;
Console.Write(CurrentlyTypedConsoleText);
}
// Used to beep if you tried to erase without anything typed. Got annoying. Disabled it.
//else {
// Console.Beep();
//}
}
// If we're trying to type and there's enough space...
if (CurrentlyTypedConsoleText.Length < Console.BufferWidth - 1)
{
if (c != '\b' && (kInfo.Modifiers & ConsoleModifiers.Control) == 0)
{
// Ctrl isn't behind held and it's not a backspace. Append the currently typed text.
CurrentlyTypedConsoleText += c;
if (CurrentlyTypedConsoleText.Length == Console.BufferWidth - 1)
{
// If the length of the current text is now the buffer width, don't let it type anymore.
// I would allow multi-line editing but this was quite problematic and I just didn't bother.
Console.SetOut(NULL_WRITER);
}
}
}
else
{
// Beep if we can't type any more text.
Console.Beep();
}
// Holding Ctrl...
if ((kInfo.Modifiers & ConsoleModifiers.Control) != 0)
{
if (c == 0x16)
{ //0x16 SYN aka CTRL+V was input. Paste.
string clipboard = GetClipboard();
if (clipboard != null)
{
// Try to add the text to the current typed stuff.
string resultText = CurrentlyTypedConsoleText + clipboard;
if (resultText.Length < Console.BufferWidth - 1)
{
// Append the text to the currently typed text.
CurrentlyTypedConsoleText += clipboard;
Console.CursorLeft = 0;
Console.Write(new string(' ', Console.BufferWidth - 1));
Console.CursorLeft = 0;
Console.Write(CurrentlyTypedConsoleText);
}
else
{
// If the text is too long after adding the pasted content, beep and don't add it.
Console.Beep();
}
// Old clipboard test. Failed.
//Stream consoleOut = Console.OpenStandardOutput();
//consoleOut.Write(Encoding.Default.GetBytes(clipboard), 0, clipboard.Length);
//Console.CursorLeft--;
//Console.Out.Write(clipboard);
}
else
{
// Beep if nothing is on the clipboard that can be pasted.
Console.Beep();
}
}
}
// Prep for loop repeat.
kInfo = Console.ReadKey(false);
c = kInfo.KeyChar;
}
// If we make it here, we've pressed enter. Log the input text in the console.
Console.ForegroundColor = ConsoleColor.DarkYellow;
Console.Write("CONSOLE ISSUED >> ");
Console.ForegroundColor = ConsoleColor.DarkGreen;
Console.Write(CurrentlyTypedConsoleText);
Console.ForegroundColor = ConsoleColor.Green;
string cmd = CurrentlyTypedConsoleText;
CurrentlyTypedConsoleText = "";
Console.CursorLeft = 0;
Console.CursorTop++;
try
{
XanBotLogger.LogMessage("CONSOLE ISSUED >> " + cmd);
CommandMarshaller.HandleCommand(cmd).GetAwaiter().GetResult();
CommandCache.Add(cmd);
CommandCachePosition = CommandCache.Count;
}
catch (Exception ex)
{
// In this case, the command failed. We should clear the typed console text.
// Write the exception to the console.
XanBotLogger.WriteException(ex);
}
}