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