cursor: Don't access the cursor tracker from the screen directly

Go through the get_for_screen getter.

src/core/display.c

@@ -1768,6 +1768,7 @@ meta_display_set_grab_op_cursor (MetaDisplay *display,
 {
   unsigned char mask_bits[XIMaskLen (XI_LASTEVENT)] = { 0 };
   XIEventMask mask = { XIAllMasterDevices, sizeof (mask_bits), mask_bits };
+  MetaCursorTracker *tracker = meta_cursor_tracker_get_for_screen (screen);
   MetaCursor cursor = meta_cursor_for_grab_op (op);
   MetaCursorReference *cursor_ref;
 
@@ -1803,8 +1804,8 @@ meta_display_set_grab_op_cursor (MetaDisplay *display,
 
   meta_error_trap_pop (display);
 
-  cursor_ref = meta_cursor_reference_from_theme (screen->cursor_tracker, cursor);
-  meta_cursor_tracker_set_grab_cursor (screen->cursor_tracker, cursor_ref);
+  cursor_ref = meta_cursor_reference_from_theme (tracker, cursor);
+  meta_cursor_tracker_set_grab_cursor (tracker, cursor_ref);
   meta_cursor_reference_unref (cursor_ref);
 }
 
@@ -1980,9 +1981,11 @@ void
 meta_display_end_grab_op (MetaDisplay *display,
                           guint32      timestamp)
 {
+  MetaCursorTracker *tracker;
+
   meta_topic (META_DEBUG_WINDOW_OPS,
               "Ending grab op %u at time %u\n", display->grab_op, timestamp);
-  
+
   if (display->grab_op == META_GRAB_OP_NONE)
     return;
 
@@ -2025,7 +2028,8 @@ meta_display_end_grab_op (MetaDisplay *display,
         meta_screen_ungrab_all_keys (display->screen, timestamp);
     }
 
-  meta_cursor_tracker_set_grab_cursor (display->screen->cursor_tracker, NULL);
+  tracker = meta_cursor_tracker_get_for_screen (display->screen);
+  meta_cursor_tracker_set_grab_cursor (tracker, NULL);
 
   display->grab_timestamp = 0;
   display->grab_window = NULL;

src/core/screen.c

@@ -1388,9 +1388,10 @@ meta_screen_update_cursor (MetaScreen *screen)
   MetaCursor cursor = screen->current_cursor;
   Cursor xcursor;
   MetaCursorReference *cursor_ref;
+  MetaCursorTracker *tracker = meta_cursor_tracker_get_for_screen (screen);
 
-  cursor_ref = meta_cursor_reference_from_theme (screen->cursor_tracker, cursor);
-  meta_cursor_tracker_set_root_cursor (screen->cursor_tracker, cursor_ref);
+  cursor_ref = meta_cursor_reference_from_theme (tracker, cursor);
+  meta_cursor_tracker_set_root_cursor (tracker, cursor_ref);
   meta_cursor_reference_unref (cursor_ref);
 
   /* Set a cursor for X11 applications that don't specify their own */
@@ -1498,6 +1499,7 @@ MetaWindow*
 meta_screen_get_mouse_window (MetaScreen  *screen,
                               MetaWindow  *not_this_one)
 {
+  MetaCursorTracker *tracker = meta_cursor_tracker_get_for_screen (screen);
   MetaWindow *window;
   int x, y;
 
@@ -1505,8 +1507,7 @@ meta_screen_get_mouse_window (MetaScreen  *screen,
     meta_topic (META_DEBUG_FOCUS,
                 "Focusing mouse window excluding %s\n", not_this_one->desc);
 
-  meta_cursor_tracker_get_pointer (screen->cursor_tracker,
-                                   &x, &y, NULL);
+  meta_cursor_tracker_get_pointer (tracker, &x, &y, NULL);
 
   window = meta_stack_get_default_focus_window_at_point (screen->stack,
                                                          screen->active_workspace,
@@ -1785,6 +1786,8 @@ meta_screen_get_current_monitor_for_pos (MetaScreen *screen,
 int
 meta_screen_get_current_monitor (MetaScreen *screen)
 {
+  MetaCursorTracker *tracker = meta_cursor_tracker_get_for_screen (screen);
+
   if (screen->n_monitor_infos == 1)
     return 0;
   
@@ -1795,8 +1798,7 @@ meta_screen_get_current_monitor (MetaScreen *screen)
     {
       int x, y;
 
-      meta_cursor_tracker_get_pointer (screen->cursor_tracker,
-                                       &x, &y, NULL);
+      meta_cursor_tracker_get_pointer (tracker, &x, &y, NULL);
       meta_screen_get_current_monitor_for_pos (screen, x, y);
     }
 
@@ -3311,7 +3313,9 @@ gboolean
 meta_screen_handle_xevent (MetaScreen *screen,
                            XEvent     *xevent)
 {
-  if (meta_cursor_tracker_handle_xevent (screen->cursor_tracker, xevent))
+  MetaCursorTracker *tracker = meta_cursor_tracker_get_for_screen (screen);
+
+  if (meta_cursor_tracker_handle_xevent (tracker, xevent))
     return TRUE;
 
   return FALSE;

src/core/window.c

@@ -9220,6 +9220,7 @@ window_focus_on_pointer_rest_callback (gpointer data)
   MetaWindow *window = focus_data->window;
   MetaDisplay *display = window->display;
   MetaScreen *screen = window->screen;
+  MetaCursorTracker *tracker = meta_cursor_tracker_get_for_screen (screen);
   int root_x, root_y;
   guint32 timestamp;
   ClutterActor *child;
@@ -9227,8 +9228,7 @@ window_focus_on_pointer_rest_callback (gpointer data)
   if (meta_prefs_get_focus_mode () == G_DESKTOP_FOCUS_MODE_CLICK)
     goto out;
 
-  meta_cursor_tracker_get_pointer (screen->cursor_tracker,
-                                   &root_x, &root_y, NULL);
+  meta_cursor_tracker_get_pointer (tracker, &root_x, &root_y, NULL);
 
   if (root_x != focus_data->pointer_x ||
       root_y != focus_data->pointer_y)

src/x11/window-x11.c

@@ -1560,11 +1560,11 @@ meta_window_x11_property_notify (MetaWindow *window,
 static int
 query_pressed_buttons (MetaWindow *window)
 {
+  MetaCursorTracker *tracker = meta_cursor_tracker_get_for_screen (window->screen);
   ClutterModifierType mods;
   int button = 0;
 
-  meta_cursor_tracker_get_pointer (window->screen->cursor_tracker,
-                                   NULL, NULL, &mods);
+  meta_cursor_tracker_get_pointer (tracker, NULL, NULL, &mods);
 
   if (mods & CLUTTER_BUTTON1_MASK)
     button |= 1 << 1;