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, 5 insertions, 5 deletions

diff --git a/source/blender/editors/interface/interface_region_popover.c b/source/blender/editors/interface/interface_region_popover.c
index 5e88d48a787..4e4854c8209 100644
--- a/source/blender/editors/interface/interface_region_popover.c
+++ b/source/blender/editors/interface/interface_region_popover.c
@@ -172,21 +172,21 @@ static uiBlock *ui_block_func_POPOVER(bContext *C, uiPopupBlockHandle *handle, v
 
     if (!slideout) {
       ScrArea *sa = CTX_wm_area(C);
-      ARegion *ar = CTX_wm_region(C);
+      ARegion *region = CTX_wm_region(C);
 
-      if (ar && ar->panels.first) {
+      if (region && region->panels.first) {
         /* For regions with panels, prefer to open to top so we can
          * see the values of the buttons below changing. */
         UI_block_direction_set(block, UI_DIR_UP | UI_DIR_CENTER_X);
       }
       /* Prefer popover from header to be positioned into the editor. */
-      else if (sa && ar) {
-        if (ELEM(ar->regiontype, RGN_TYPE_HEADER, RGN_TYPE_TOOL_HEADER)) {
+      else if (sa && region) {
+        if (ELEM(region->regiontype, RGN_TYPE_HEADER, RGN_TYPE_TOOL_HEADER)) {
           if (RGN_ALIGN_ENUM_FROM_MASK(ED_area_header_alignment(sa)) == RGN_ALIGN_BOTTOM) {
             UI_block_direction_set(block, UI_DIR_UP | UI_DIR_CENTER_X);
           }
         }
-        if (ar->regiontype == RGN_TYPE_FOOTER) {
+        if (region->regiontype == RGN_TYPE_FOOTER) {
           if (RGN_ALIGN_ENUM_FROM_MASK(ED_area_footer_alignment(sa)) == RGN_ALIGN_BOTTOM) {
             UI_block_direction_set(block, UI_DIR_UP | UI_DIR_CENTER_X);
           }