Remove 'is_pointer_on_this_screen'

The tracking bit-field for determining where the pointer is on different
screens is no longer used.

Fixes #333

fvwm/events.c

@@ -2143,26 +2143,7 @@ ENTER_DBG((stderr, "en: exit: found LeaveNotify\n"));
 	{
 		FvwmWindow *lf = get_last_screen_focus_window();
 
-		if (!Scr.flags.is_pointer_on_this_screen)
-		{
-			Scr.flags.is_pointer_on_this_screen = 1;
-			if (lf && lf != &Scr.FvwmRoot &&
-			    !FP_DO_UNFOCUS_LEAVE(FW_FOCUS_POLICY(lf)))
-			{
-				SetFocusWindow(lf, True, FOCUS_SET_FORCE);
-			}
-			else if (lf != &Scr.FvwmRoot)
-			{
-				ForceDeleteFocus();
-			}
-			else
-			{
-				/* This was the first EnterNotify event for the
-				 * root window - ignore */
-			}
-			set_last_screen_focus_window(NULL);
-		}
-		else if (!(sf = get_focus_window()) ||
+		if (!(sf = get_focus_window()) ||
 			 FP_DO_UNFOCUS_LEAVE(FW_FOCUS_POLICY(sf)))
 		{
 			DeleteFocus(True);
@@ -2180,10 +2161,6 @@ ENTER_DBG((stderr, "en: exit: found LeaveNotify\n"));
 		focus_grab_buttons(lf);
 		return;
 	}
-	else
-	{
-		Scr.flags.is_pointer_on_this_screen = 1;
-	}
 
 	/* An EnterEvent in one of the PanFrameWindows activates the Paging or
 	   an EdgeCommand. */
@@ -2238,7 +2215,6 @@ ENTER_DBG((stderr, "en: exit: found LeaveNotify\n"));
 				m = fw->m;
 
 			/* this was in the HandleMotionNotify before, HEDU */
-			Scr.flags.is_pointer_on_this_screen = 1;
 			e = *te;
 			int p = HandlePaging(
 				&e, m->virtual_scr.EdgeScrollX,

fvwm/focus.c

@@ -253,27 +253,6 @@ static void __update_windowlist(
 	return;
 }
 
-static Bool __try_other_screen_focus(const FvwmWindow *fw)
-{
-	if (fw == NULL && !Scr.flags.is_pointer_on_this_screen)
-	{
-		FvwmWindow *sf;
-
-		sf = get_focus_window();
-		set_focus_window(NULL);
-		if (sf != NULL)
-		{
-			focus_grab_buttons(sf);
-		}
-		/* DV (25-Nov-2000): Don't give the Scr.NoFocusWin the focus
-		 * here. This would steal the focus from the other screen's
-		 * root window again. */
-		return True;
-	}
-
-	return False;
-}
-
 /*
  * Sets the input focus to the indicated window.
  */
@@ -293,10 +272,6 @@ static void __set_focus_to_fwin(
 		return;
 	}
 	__update_windowlist(fw, args->set_by, args->is_focus_by_flip_focus_cmd);
-	if (__try_other_screen_focus(fw) == True)
-	{
-		return;
-	}
 
 	if (fw && !args->do_forbid_warp)
 	{

fvwm/fvwm3.c

@@ -1207,10 +1207,6 @@ static void InitVariables(void)
 	/* Not the right place for this, should only be called once
 	 * somewhere .. */
 
-	Scr.flags.is_pointer_on_this_screen = !!FQueryPointer(
-		dpy, Scr.Root, &JunkRoot, &JunkChild, &JunkX, &JunkY, &JunkX,
-		&JunkY, &JunkMask);
-
 	/* make sure colorset 0 exists */
 	alloc_colorset(0);
 

fvwm/screen.h

@@ -460,8 +460,6 @@ typedef struct ScreenInfo
 		unsigned is_executing_complex_function : 1;
 		unsigned is_executing_menu_function : 1;
 		unsigned is_map_desk_in_progress : 1;
-		unsigned is_pointer_on_this_screen : 1;
-		unsigned is_single_screen : 1;
 		unsigned is_window_scheduled_for_destroy : 1;
 		unsigned is_wire_frame_displayed : 1;
 	} flags;