Cleanup: avoid the term old when storing/restoring context variables

source/blender/editors/interface/interface_handlers.c

@@ -8432,10 +8432,10 @@ void ui_but_activate_event(bContext *C, ARegion *ar, uiBut *but)
   event.customdata = but;
   event.customdatafree = false;
 
-  ARegion *old_ar = CTX_wm_region(C);
+  ARegion *ar_ctx = CTX_wm_region(C);
   CTX_wm_region_set(C, ar);
   ui_do_button(C, but->block, but, &event);
-  CTX_wm_region_set(C, old_ar);
+  CTX_wm_region_set(C, ar_ctx);
 }
 
 /**

source/blender/editors/screen/screen_edit.c

@@ -687,7 +687,7 @@ void ED_screen_set_active_region(bContext *C, wmWindow *win, const int xy[2])
 
   ScrArea *sa = NULL;
   ARegion *ar;
-  ARegion *old_ar = scr->active_region;
+  ARegion *ar_prev = scr->active_region;
 
   ED_screen_areas_iter(win, scr, area_iter)
   {
@@ -714,7 +714,7 @@ void ED_screen_set_active_region(bContext *C, wmWindow *win, const int xy[2])
   }
 
   /* Check for redraw headers. */
-  if (old_ar != scr->active_region) {
+  if (ar_prev != scr->active_region) {
 
     ED_screen_areas_iter(win, scr, area_iter)
     {
@@ -723,20 +723,20 @@ void ED_screen_set_active_region(bContext *C, wmWindow *win, const int xy[2])
       for (ar = area_iter->regionbase.first; ar; ar = ar->next) {
 
         /* Call old area's deactivate if assigned. */
-        if (ar == old_ar && area_iter->type->deactivate) {
+        if (ar == ar_prev && area_iter->type->deactivate) {
           area_iter->type->deactivate(area_iter);
         }
 
-        if (ar == old_ar && ar != scr->active_region) {
-          wmGizmoMap *gzmap = old_ar->gizmo_map;
+        if (ar == ar_prev && ar != scr->active_region) {
+          wmGizmoMap *gzmap = ar_prev->gizmo_map;
           if (gzmap) {
             if (WM_gizmo_highlight_set(gzmap, NULL)) {
-              ED_region_tag_redraw_no_rebuild(old_ar);
+              ED_region_tag_redraw_no_rebuild(ar_prev);
             }
           }
         }
 
-        if (ar == old_ar || ar == scr->active_region) {
+        if (ar == ar_prev || ar == scr->active_region) {
           do_draw = true;
         }
       }
@@ -758,9 +758,9 @@ void ED_screen_set_active_region(bContext *C, wmWindow *win, const int xy[2])
   }
   else {
     /* Notifier invokes freeing the buttons... causing a bit too much redraws. */
-    region_cursor_set_ex(win, sa, scr->active_region, old_ar != scr->active_region);
+    region_cursor_set_ex(win, sa, scr->active_region, ar_prev != scr->active_region);
 
-    if (old_ar != scr->active_region) {
+    if (ar_prev != scr->active_region) {
       /* This used to be a notifier, but needs to be done immediate
        * because it can undo setting the right button as active due
        * to delayed notifier handling. */

source/blender/editors/space_file/file_ops.c

@@ -1722,7 +1722,7 @@ static int file_smoothscroll_invoke(bContext *C, wmOperator *UNUSED(op), const w
 {
   ScrArea *sa = CTX_wm_area(C);
   SpaceFile *sfile = CTX_wm_space_file(C);
-  ARegion *ar, *oldar = CTX_wm_region(C);
+  ARegion *ar, *ar_ctx = CTX_wm_region(C);
   const bool is_horizontal = (sfile->layout->flag & FILE_LAYOUT_HOR) != 0;
   int i;
 
@@ -1886,7 +1886,7 @@ static int file_smoothscroll_invoke(bContext *C, wmOperator *UNUSED(op), const w
   ED_region_tag_redraw(ar);
 
   /* and restore context */
-  CTX_wm_region_set(C, oldar);
+  CTX_wm_region_set(C, ar_ctx);
 
   return OPERATOR_FINISHED;
 }

source/blender/windowmanager/intern/wm_event_system.c

@@ -3101,9 +3101,9 @@ void wm_event_do_handlers(bContext *C)
 
           if (((is_playing_sound == 1) && (is_playing_screen == 0)) ||
               ((is_playing_sound == 0) && (is_playing_screen == 1))) {
-            wmWindow *context_old_win = CTX_wm_window(C);
-            bScreen *context_screen_win = CTX_wm_screen(C);
-            Scene *context_scene_win = CTX_data_scene(C);
+            wmWindow *win_ctx = CTX_wm_window(C);
+            bScreen *screen_stx = CTX_wm_screen(C);
+            Scene *scene_ctx = CTX_data_scene(C);
 
             CTX_wm_window_set(C, win);
             CTX_wm_screen_set(C, screen);
@@ -3111,9 +3111,9 @@ void wm_event_do_handlers(bContext *C)
 
             ED_screen_animation_play(C, -1, 1);
 
-            CTX_data_scene_set(C, context_scene_win);
-            CTX_wm_screen_set(C, context_screen_win);
-            CTX_wm_window_set(C, context_old_win);
+            CTX_data_scene_set(C, scene_ctx);
+            CTX_wm_screen_set(C, screen_stx);
+            CTX_wm_window_set(C, win_ctx);
           }
 
           if (is_playing_sound == 0) {