WINDOW_PANES_BORDER_D
mask |= WINDOW_PANES_BORDER_D;
mask = WINDOW_PANES_BORDER_U|WINDOW_PANES_BORDER_D;
WINDOW_PANES_BORDER_U|WINDOW_PANES_BORDER_D:
case WINDOW_PANES_BORDER_L|WINDOW_PANES_BORDER_R|WINDOW_PANES_BORDER_D:
case WINDOW_PANES_BORDER_L|WINDOW_PANES_BORDER_U|WINDOW_PANES_BORDER_D:
case WINDOW_PANES_BORDER_L|WINDOW_PANES_BORDER_D:
case WINDOW_PANES_BORDER_R|WINDOW_PANES_BORDER_U|WINDOW_PANES_BORDER_D:
case WINDOW_PANES_BORDER_R|WINDOW_PANES_BORDER_D:
case WINDOW_PANES_BORDER_U|WINDOW_PANES_BORDER_D:
case WINDOW_PANES_BORDER_D:
return ((mask & (WINDOW_PANES_BORDER_U|WINDOW_PANES_BORDER_D)) != 0);
y - 1, WINDOW_PANES_BORDER_D);
y2 - 1, WINDOW_PANES_BORDER_D);