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, 6 insertions, 6 deletions

diff --git a/source/blender/draw/DRW_select_buffer.h b/source/blender/draw/DRW_select_buffer.h
index 0ad13af81ba..6ebc30d0382 100644
--- a/source/blender/draw/DRW_select_buffer.h
+++ b/source/blender/draw/DRW_select_buffer.h
@@ -90,34 +90,34 @@ uint DRW_select_buffer_context_offset_for_object_elem(struct Depsgraph *depsgrap
                                                       struct Object *object,
                                                       char elem_type);
 uint *DRW_select_buffer_read(struct Depsgraph *depsgraph,
-                             struct ARegion *ar,
+                             struct ARegion *region,
                              struct View3D *v3d,
                              const rcti *rect,
                              uint *r_buf_len);
 uint *DRW_select_buffer_bitmap_from_rect(struct Depsgraph *depsgraph,
-                                         struct ARegion *ar,
+                                         struct ARegion *region,
                                          struct View3D *v3d,
                                          const struct rcti *rect,
                                          uint *r_bitmap_len);
 uint *DRW_select_buffer_bitmap_from_circle(struct Depsgraph *depsgraph,
-                                           struct ARegion *ar,
+                                           struct ARegion *region,
                                            struct View3D *v3d,
                                            const int center[2],
                                            const int radius,
                                            uint *r_bitmap_len);
 uint *DRW_select_buffer_bitmap_from_poly(struct Depsgraph *depsgraph,
-                                         struct ARegion *ar,
+                                         struct ARegion *region,
                                          struct View3D *v3d,
                                          const int poly[][2],
                                          const int poly_len,
                                          const struct rcti *rect,
                                          uint *r_bitmap_len);
 uint DRW_select_buffer_sample_point(struct Depsgraph *depsgraph,
-                                    struct ARegion *ar,
+                                    struct ARegion *region,
                                     struct View3D *v3d,
                                     const int center[2]);
 uint DRW_select_buffer_find_nearest_to_point(struct Depsgraph *depsgraph,
-                                             struct ARegion *ar,
+                                             struct ARegion *region,
                                              struct View3D *v3d,
                                              const int center[2],
                                              const uint id_min,