// Returs true if the value of Key.Character can be displayed.
public bool CanDisplay(KeyEventRecord Key)
{
bool AltKey = Key.VirtualKeyCode == 0x12;
bool CtrlKey = Key.VirtualKeyCode == 0x11;
bool ShiftKey = Key.VirtualKeyCode == 0x10;
// Win and App keys
bool SpecialKey = Key.VirtualKeyCode >= 0x5B && Key.VirtualKeyCode <= 0x5D;
// Num Lock, Scroll Lock, Caps Lock
bool LockKey = Key.VirtualKeyCode == 0x90 || Key.VirtualKeyCode == 0x91 || Key.VirtualKeyCode == 0x14;
if (SpecialKey || LockKey || CtrlKey || ShiftKey)
{
return(false);
}
// Alt keys are a bit weird in that the Alt-up can contain a valid character, entered via ALT + Numpad
if (Key.KeyDown == 0 && !AltKey)
{
return(false);
}
return(Key.Character != '\0');
}
public ConsoleKeyInfo ReadKey(bool intercept)
{
KeyEventRecord KeyEvent = new KeyEventRecord();
if (SavedKey.RepeatCount != 0)
{
KeyEvent = SavedKey;
SavedKey.RepeatCount--;
}
else
{
while (true)
{
KeyEvent = NextEvent(InputRecordType.KeyEvent).KeyEvent;
KeyEvent.RepeatCount--;
if (CanDisplay(KeyEvent))
{
break;
}
}
}
if (KeyEvent.RepeatCount != 0)
{
SavedKey = KeyEvent;
}
if (!intercept)
{
ConsoleEx.ScreenBuffer.Write(KeyEvent.Character);
}
bool Shift = (KeyEvent.ControlKeyState & CtrlKeyState.SHIFT_PRESSED) != 0;
bool Ctrl = (KeyEvent.ControlKeyState & (CtrlKeyState.LEFT_CTRL_PRESSED | CtrlKeyState.RIGHT_CTRL_PRESSED)) != 0;
bool Alt = (KeyEvent.ControlKeyState & (CtrlKeyState.LEFT_ALT_PRESSED | CtrlKeyState.RIGHT_ALT_PRESSED)) != 0;
return(new ConsoleKeyInfo(KeyEvent.Character, (ConsoleKey)KeyEvent.VirtualKeyCode, Shift, Alt, Ctrl));
}