Cleanup: Rename ARegion variables from ar to region

The old convention was easy to confuse with ScrArea.
Part of https://developer.blender.org/T74432.

This is mostly a batch rename with some manual fixing. Only single word
variable names are changed, no prefixed/suffixed names.

Brecht van Lommel and Campbell Barton both gave me a green light for
this convention change.

Also ran clan clang format on affected files.

1 files changed, 10 insertions, 10 deletions

diff --git a/source/blender/editors/render/render_update.c b/source/blender/editors/render/render_update.c
index 3918737d560..e494bd90d65 100644
--- a/source/blender/editors/render/render_update.c
+++ b/source/blender/editors/render/render_update.c
@@ -107,7 +107,7 @@ void ED_render_scene_update(const DEGEditorUpdateContext *update_ctx, int update
   for (win = wm->windows.first; win; win = win->next) {
     bScreen *sc = WM_window_get_active_screen(win);
     ScrArea *sa;
-    ARegion *ar;
+    ARegion *region;
 
     CTX_wm_window_set(C, win);
 
@@ -116,11 +116,11 @@ void ED_render_scene_update(const DEGEditorUpdateContext *update_ctx, int update
         continue;
       }
       View3D *v3d = sa->spacedata.first;
-      for (ar = sa->regionbase.first; ar; ar = ar->next) {
-        if (ar->regiontype != RGN_TYPE_WINDOW) {
+      for (region = sa->regionbase.first; region; region = region->next) {
+        if (region->regiontype != RGN_TYPE_WINDOW) {
           continue;
         }
-        RegionView3D *rv3d = ar->regiondata;
+        RegionView3D *rv3d = region->regiondata;
         RenderEngine *engine = rv3d->render_engine;
         /* call update if the scene changed, or if the render engine
          * tagged itself for update (e.g. because it was busy at the
@@ -129,7 +129,7 @@ void ED_render_scene_update(const DEGEditorUpdateContext *update_ctx, int update
 
           CTX_wm_screen_set(C, sc);
           CTX_wm_area_set(C, sa);
-          CTX_wm_region_set(C, ar);
+          CTX_wm_region_set(C, region);
 
           engine->flag &= ~RE_ENGINE_DO_UPDATE;
           /* NOTE: Important to pass non-updated depsgraph, This is because this function is called
@@ -145,7 +145,7 @@ void ED_render_scene_update(const DEGEditorUpdateContext *update_ctx, int update
                 .depsgraph = update_ctx->depsgraph,
                 .scene = scene,
                 .view_layer = view_layer,
-                .ar = ar,
+                .region = region,
                 .v3d = (View3D *)sa->spacedata.first,
                 .engine_type = engine_type,
             }));
@@ -163,18 +163,18 @@ void ED_render_scene_update(const DEGEditorUpdateContext *update_ctx, int update
 void ED_render_engine_area_exit(Main *bmain, ScrArea *sa)
 {
   /* clear all render engines in this area */
-  ARegion *ar;
+  ARegion *region;
   wmWindowManager *wm = bmain->wm.first;
 
   if (sa->spacetype != SPACE_VIEW3D) {
     return;
   }
 
-  for (ar = sa->regionbase.first; ar; ar = ar->next) {
-    if (ar->regiontype != RGN_TYPE_WINDOW || !(ar->regiondata)) {
+  for (region = sa->regionbase.first; region; region = region->next) {
+    if (region->regiontype != RGN_TYPE_WINDOW || !(region->regiondata)) {
       continue;
     }
-    ED_view3d_stop_render_preview(wm, ar);
+    ED_view3d_stop_render_preview(wm, region);
   }
 }