public void DoTabCompletion()
{
var inputState = new InputState();
Console.Write('>');
while (true)
{
var input = Console.ReadKey(true);
switch (input.Key)
{
case ConsoleKey.Tab:
if (input.Modifiers.HasFlag(ConsoleModifiers.Shift))
{
inputState.TabIndex = (inputState.TabIndex ?? 0) - 1;
}
else
{
if (inputState.TabIndex.HasValue)
{
++inputState.TabIndex;
}
else
{
inputState.TabIndex = 0;
}
}
var action = GetAction(inputState);
if (action != null)
{
ClearCurrentConsoleLine();
Console.Write(action.FullText);
inputState.TabCompletedBuffer = action.FullText;
}
break;
case ConsoleKey.Enter:
// We need a newline regardless of what the next action is
Console.WriteLine();
var selectedAction = GetAction(inputState);
if (selectedAction != null)
{
selectedAction.Execute();
return;
}
else
{
ConsoleHelpers.WriteRedLine("No action with that name recognized, try again or ask for `help`");
}
inputState = new InputState();
break;
case ConsoleKey.Escape:
inputState = new InputState();
ClearCurrentConsoleLine();
break;
case ConsoleKey.Backspace:
Console.Write("\b \b");
inputState.Backspace();
break;
default:
inputState.Append(input.KeyChar);
Console.Write(input.KeyChar);
break;
}
}
}