bug#6113: 23.1.97; doc of :box face attibute

[Juanma Barranquero <lekktu@gmail.com>]

On Sun, Jul 3, 2011 at 02:06, Lars Magne Ingebrigtsen <larsi@gnus.org> wrote:

> Could someone who knows what a negative `line-width' in :box means

From xfaces.c:realize_x_face():

          if (EQ (keyword, QCline_width))
            {
              if (INTEGERP (value) && XINT (value) != 0)
                face->box_line_width = XINT (value);
            }
          else
            /* etc. */

and from dispextern.h:

  /* Non-zero means characters in this face have a box that thickness
     around them.  If it is negative, the absolute value indicates the
     thickness, and the horizontal lines of box (top and bottom) are
     drawn inside of characters glyph area.  The vertical lines of box
     (left and right) are drawn as the same way as the case that this
     value is positive.  */
  int box_line_width;

    Juanma