public override KeyInfo ReadKey(ReadKeyOptions options)
{
if (this.externalRawUI == null)
{
this.ThrowNotInteractive();
}
KeyInfo info = new KeyInfo();
try
{
info = this.externalRawUI.ReadKey(options);
}
catch (PipelineStoppedException)
{
LocalPipeline currentlyRunningPipeline = (LocalPipeline) ((RunspaceBase) this.parentHost.Context.CurrentRunspace).GetCurrentlyRunningPipeline();
if (currentlyRunningPipeline == null)
{
throw;
}
currentlyRunningPipeline.Stopper.Stop();
}
return info;
}
ReadKey(ReadKeyOptions options)
{
if (_externalRawUI == null)
{
ThrowNotInteractive();
}
KeyInfo result = new KeyInfo();
try
{
result = _externalRawUI.ReadKey(options);
}
catch (PipelineStoppedException)
{
//PipelineStoppedException is thrown by host when it wants
//to stop the pipeline.
LocalPipeline lpl = (LocalPipeline)((RunspaceBase)_parentHost.Context.CurrentRunspace).GetCurrentlyRunningPipeline();
if (lpl == null)
{
throw;
}
lpl.Stopper.Stop();
}
return result;
}
KEY_EVENT_RECORDToKeyInfo(ConsoleControl.KEY_EVENT_RECORD keyEventRecord, out KeyInfo keyInfo)
{
keyInfo = new KeyInfo(
keyEventRecord.VirtualKeyCode,
keyEventRecord.UnicodeChar,
(ControlKeyStates)keyEventRecord.ControlKeyState,
keyEventRecord.KeyDown);
}
/// <summary>
/// Thread method invoked from <see cref="ReadKey"/> that waits for the user to press a key.
/// </summary>
/// <param name="state"><see cref="Tuple{T1, T2}"/> object containing a <see cref="StreamConnection"/> object and a <see cref="ReadKeyOptions"/>
/// object.</param>
private void ReadInput(object state)
{
StreamConnection connection = (state as Tuple<StreamConnection, ReadKeyOptions>).Item1;
ReadKeyOptions options = (state as Tuple<StreamConnection, ReadKeyOptions>).Item2;
bool inEscapeSequence = false;
bool readKey = false;
while (!readKey)
{
if (connection.OutputQueue.Count > 0)
{
while (connection.OutputQueue.Count > 0)
{
byte currentByte = connection.OutputQueue.Dequeue();
// Handle the backspace key
if (currentByte == 8)
{
_readKey = new KeyInfo
{
VirtualKeyCode = 8
};
// If we're not already at the beginning of the line and we're echoing the output, move the cursor left
if ((options & ReadKeyOptions.NoEcho) != ReadKeyOptions.NoEcho && CursorPosition.X > 1)
CursorPosition = new Coordinates(CursorPosition.X - 1, CursorPosition.Y);
readKey = true;
break;
}
// The ^X character signifies the start of an ANSI escape sequence
else if (currentByte == 27)
inEscapeSequence = true;
// If we're in an escape sequence, read past the "[" and "~" characters
else if (currentByte == 91 && inEscapeSequence)
{
}
else if (currentByte == 126 && inEscapeSequence)
{
}
// ^X7 is the home key
else if (currentByte == 55 && inEscapeSequence)
{
_readKey = new KeyInfo
{
VirtualKeyCode = 0x24
};
// If we're not already at the beginning of the line and we're echoing the output, move the cursor to the start of the line
if ((options & ReadKeyOptions.NoEcho) != ReadKeyOptions.NoEcho)
CursorPosition = new Coordinates(1, CursorPosition.Y);
readKey = true;
break;
}
// ^X8 or ^X3 is the end key
else if ((currentByte == 56 || currentByte == 51) && inEscapeSequence)
{
_readKey = new KeyInfo
{
VirtualKeyCode = 0x23
};
// If we're not already at the beginning of the line and we're echoing the output, move the cursor to the end of the line
if ((options & ReadKeyOptions.NoEcho) != ReadKeyOptions.NoEcho)
CursorPosition = new Coordinates(BufferSize.Width, CursorPosition.Y);
readKey = true;
break;
}
// ^XD is the left arrow
else if (currentByte == 68 && inEscapeSequence)
{
_readKey = new KeyInfo
{
VirtualKeyCode = 0x25
};
// If we're not already at the beginning of the line and we're echoing the output, move the cursor left
if ((options & ReadKeyOptions.NoEcho) != ReadKeyOptions.NoEcho && CursorPosition.X > 1)
CursorPosition = new Coordinates(CursorPosition.X - 1, CursorPosition.Y);
readKey = true;
break;
}
// ^XC is the right arrow
else if (currentByte == 67 && inEscapeSequence)
{
_readKey = new KeyInfo
{
VirtualKeyCode = 0x27
};
// If we're not already at the beginning of the line and we're echoing the output, move the cursor right
if ((options & ReadKeyOptions.NoEcho) != ReadKeyOptions.NoEcho && CursorPosition.X < BufferSize.Width)
CursorPosition = new Coordinates(CursorPosition.X + 1, CursorPosition.Y);
readKey = true;
break;
}
// Handle the carriage return sequence
else if (currentByte == 13)
{
_readKey = new KeyInfo
{
Character = '\r',
VirtualKeyCode = 0x0D
};
if ((options & ReadKeyOptions.NoEcho) != ReadKeyOptions.NoEcho)
CursorPosition = new Coordinates(1, CursorPosition.Y);
readKey = true;
break;
}
// Otherwise, get the virtual key code and character and populate _readKey
else
{
short virtualKey = User32.VkKeyScan((char) currentByte);
int modifiers = virtualKey >> 8;
ControlKeyStates controlKeys = 0;
if ((modifiers & 2) != 0)
controlKeys |= ControlKeyStates.LeftCtrlPressed;
if ((modifiers & 4) != 0)
controlKeys |= ControlKeyStates.LeftAltPressed;
_readKey = new KeyInfo
{
Character = (char) currentByte,
VirtualKeyCode = (virtualKey & 0xFF),
ControlKeyState = controlKeys
};
if ((options & ReadKeyOptions.NoEcho) != ReadKeyOptions.NoEcho)
{
_terminal.TerminalPane.ConnectionTag.Receiver.DataArrived(
new byte[]
{
currentByte
}, 0, 1);
}
readKey = true;
break;
}
}
}
// If we didn't read a key, sleep for a bit
if (!readKey)
Thread.Sleep(50);
}
// Signal to ReadKey() that we've read a key
_inputSemaphore.Set();
}
