gistfile1.h

- (void)updateFrame {
  NSRect frame = _docView.frame;

  // When in landscape mode, flip around the width/height.
  if ([_docView frameRotation] == 90.) {
    CGFloat t = frame.size.width;
    frame.size.width = frame.size.height;
    frame.size.height = t;
  }

  // Scale the frame.
  frame.size.width = frame.size.width * _scale;
  frame.size.height = frame.size.height * _scale;

  self.frame = frame;
}