// Handle arbitrary command.
void OnInput(string command)
{
bool isValid = true;
if (UNARY_INCREMENT.IsMatch(command))
{
ampersand.Increment(1, command);
}
else if (UNARY_DECREMENT.IsMatch(command))
{
ampersand.Increment(-1, command);
}
else if (PULL.IsMatch(command))
{
ampersand.Assign(command);
}
else if (PUSH.IsMatch(command))
{
star.Assign(command);
}
else if (POINT.IsMatch(command))
{
Match match = POINT.Match(command);
int index = int.Parse(match.Groups[1].Value);
ampersand.TargetWord(index);
}
else if (BINARY_INCREMENT.IsMatch(command))
{
Match match = BINARY_INCREMENT.Match(command);
int delta = int.Parse(match.Groups[1].Value);
ampersand.Increment(delta, command);
}
else if (BINARY_DECREMENT.IsMatch(command))
{
Match match = BINARY_DECREMENT.Match(command);
int delta = int.Parse(match.Groups[1].Value);
ampersand.Increment(-delta, command);
}
else if (NULLIFY.IsMatch(command))
{
ampersand.Depoint();
}
else
{
Debug.Log("I dunno " + command);
isValid = false;
}
// If the input was okay, let's clear the field to get ready for
// the next command. If it wasn't, we leave the text for them to
// edit and resubmit.
if (isValid)
{
input.text = "";
}
// Unity triggers this event on two occasions: hitting enter and losing
// focus. If they hit enter, we expect the user to want to type in some
// next command -- like in a REPL. We must actively restore focus in such a
// case.
if (Input.GetKeyDown(KeyCode.KeypadEnter) || Input.GetKeyDown(KeyCode.Return))
{
input.ActivateInputField();
}
}