protected override void OnKeyPressed(ConsoleKeyInfo key)
{
if (key.Modifiers.HasFlag(ConsoleModifiers.Control) || key.Modifiers.HasFlag(ConsoleModifiers.Alt))
{
return;
}
if (_caretPos > Text.Length)
{
_caretPos = Text.Length;
}
if (_caretPos < 0)
{
_caretPos = 0;
}
var prevPos = _caretPos;
switch (key.Key)
{
case ConsoleKey.Backspace:
if (_caretPos > 0)
{
_caretPos--;
Text = Text.Remove(_caretPos, 1);
}
break;
case ConsoleKey.LeftArrow:
if (_caretPos > 0)
{
_caretPos--;
}
break;
case ConsoleKey.RightArrow:
if (_caretPos < Text.Length)
{
_caretPos++;
}
break;
case ConsoleKey.DownArrow:
_caretPos = _measurement.MoveCaretDown(_caretPos);
break;
case ConsoleKey.UpArrow:
_caretPos = _measurement.MoveCaretUp(_caretPos);
break;
case ConsoleKey.Delete:
if (_caretPos < Text.Length)
{
Text = Text.Remove(_caretPos, 1);
if (_caretPos > Text.Length)
{
_caretPos = Text.Length;
}
}
break;
case ConsoleKey.Enter:
Text = Text.Insert(_caretPos++, "\n");
break;
default:
if (!char.IsControl(key.KeyChar))
{
Text = Text.Insert(_caretPos++, key.KeyChar.ToString());
}
break;
}
if (_caretPos != prevPos)
{
var point = _measurement.CaretPosition(_caretPos);
var prevPoint = _measurement.CaretPosition(prevPos);
var indent = Math.Min(2, Math.Max(0, prevPoint.X - point.X - ActualWidth + 3));
if (ActualWidth - point.X > 0)
{
indent = 0;
}
if (point.X + _scrollX < 0)
{
_scrollX = -point.X;
}
if (point.X + _scrollX >= ActualWidth)
{
_scrollX = ActualWidth - point.X - 1;
}
_scrollX += indent;
if (point.Y + _scrollY < 0)
{
_scrollY = -point.Y;
}
if (point.Y + _scrollY >= ActualHeight)
{
_scrollY = ActualHeight - point.Y - 1;
}
}
Invalidate();
}
