Cleanup: minor changes to scrollbar checks

Remove some redundant comments & declare vars in for loops.

2 files changed, 36 insertions, 58 deletions

diff --git a/source/blender/editors/interface/interface_query.c b/source/blender/editors/interface/interface_query.c
index db60e967d6d..e1f91be1631 100644
--- a/source/blender/editors/interface/interface_query.c
+++ b/source/blender/editors/interface/interface_query.c
@@ -209,14 +209,11 @@ bool ui_but_contains_rect(const uiBut *but, const rctf *rect)
 bool ui_but_contains_point_px(const uiBut *but, const ARegion *ar, int x, int y)
 {
   uiBlock *block = but->block;
-  float mx, my;
   if (!ui_region_contains_point_px(ar, x, y)) {
     return false;
   }
 
-  mx = x;
-  my = y;
-
+  float mx = x, my = y;
   ui_window_to_block_fl(ar, block, &mx, &my);
 
   if (but->pie_dir != UI_RADIAL_NONE) {
@@ -258,23 +255,16 @@ bool ui_but_contains_point_px_icon(const uiBut *but, ARegion *ar, const wmEvent
 /* x and y are only used in case event is NULL... */
 uiBut *ui_but_find_mouse_over_ex(ARegion *ar, const int x, const int y, const bool labeledit)
 {
-  uiBlock *block;
-  uiBut *but, *butover = NULL;
-  float mx, my;
+  uiBut *butover = NULL;
 
-  //  if (!win->active) {
-  //      return NULL;
-  //  }
   if (!ui_region_contains_point_px(ar, x, y)) {
     return NULL;
   }
-
-  for (block = ar->uiblocks.first; block; block = block->next) {
-    mx = x;
-    my = y;
+  for (uiBlock *block = ar->uiblocks.first; block; block = block->next) {
+    float mx = x, my = y;
     ui_window_to_block_fl(ar, block, &mx, &my);
 
-    for (but = block->buttons.last; but; but = but->prev) {
+    for (uiBut *but = block->buttons.last; but; but = but->prev) {
       if (ui_but_is_interactive(but, labeledit)) {
         if (but->pie_dir != UI_RADIAL_NONE) {
           if (ui_but_isect_pie_seg(block, but)) {
@@ -346,20 +336,13 @@ uiBut *ui_but_find_rect_over(const struct ARegion *ar, const rcti *rect_px)
 
 uiBut *ui_list_find_mouse_over_ex(ARegion *ar, int x, int y)
 {
-  uiBlock *block;
-  uiBut *but;
-  float mx, my;
-
   if (!ui_region_contains_point_px(ar, x, y)) {
     return NULL;
   }
-
-  for (block = ar->uiblocks.first; block; block = block->next) {
-    mx = x;
-    my = y;
+  for (uiBlock *block = ar->uiblocks.first; block; block = block->next) {
+    float mx = x, my = y;
     ui_window_to_block_fl(ar, block, &mx, &my);
-
-    for (but = block->buttons.last; but; but = but->prev) {
+    for (uiBut *but = block->buttons.last; but; but = but->prev) {
       if (but->type == UI_BTYPE_LISTBOX && ui_but_contains_pt(but, mx, my)) {
         return but;
       }
@@ -498,11 +481,8 @@ bool UI_block_is_empty(const uiBlock *block)
 
 uiBut *ui_region_find_active_but(ARegion *ar)
 {
-  uiBlock *block;
-  uiBut *but;
-
-  for (block = ar->uiblocks.first; block; block = block->next) {
-    for (but = block->buttons.first; but; but = but->next) {
+  for (uiBlock *block = ar->uiblocks.first; block; block = block->next) {
+    for (uiBut *but = block->buttons.first; but; but = but->next) {
       if (but->active) {
         return but;
       }
diff --git a/source/blender/editors/interface/view2d.c b/source/blender/editors/interface/view2d.c
index 096ea230bbe..952778cfc6d 100644
--- a/source/blender/editors/interface/view2d.c
+++ b/source/blender/editors/interface/view2d.c
@@ -2629,25 +2629,24 @@ char UI_view2d_mouse_in_scrollers_ex(
   const int scroll = view2d_scroll_mapped(v2d->scroll);
   *r_scroll = scroll;
 
-  /* clamp x,y to region-coordinates first */
-  const int co[2] = {
-      x - ar->winrct.xmin,
-      y - ar->winrct.ymin,
-  };
-
-  /* check if within scrollbars */
-  if (scroll & V2D_SCROLL_HORIZONTAL) {
-    if (IN_2D_HORIZ_SCROLL(v2d, co)) {
-      return 'h';
+  if (scroll) {
+    /* Move to region-coordinates. */
+    const int co[2] = {
+        x - ar->winrct.xmin,
+        y - ar->winrct.ymin,
+    };
+    if (scroll & V2D_SCROLL_HORIZONTAL) {
+      if (IN_2D_HORIZ_SCROLL(v2d, co)) {
+        return 'h';
+      }
     }
-  }
-  if (scroll & V2D_SCROLL_VERTICAL) {
-    if (IN_2D_VERT_SCROLL(v2d, co)) {
-      return 'v';
+    if (scroll & V2D_SCROLL_VERTICAL) {
+      if (IN_2D_VERT_SCROLL(v2d, co)) {
+        return 'v';
+      }
     }
   }
 
-  /* not found */
   return 0;
 }
 
@@ -2659,23 +2658,22 @@ char UI_view2d_rect_in_scrollers_ex(const ARegion *ar,
   const int scroll = view2d_scroll_mapped(v2d->scroll);
   *r_scroll = scroll;
 
-  /* clamp x,y to region-coordinates first */
-  rcti rect_region = *rect;
-  BLI_rcti_translate(&rect_region, -ar->winrct.xmin, ar->winrct.ymin);
-
-  /* check if within scrollbars */
-  if (scroll & V2D_SCROLL_HORIZONTAL) {
-    if (IN_2D_HORIZ_SCROLL_RECT(v2d, &rect_region)) {
-      return 'h';
+  if (scroll) {
+    /* Move to region-coordinates. */
+    rcti rect_region = *rect;
+    BLI_rcti_translate(&rect_region, -ar->winrct.xmin, ar->winrct.ymin);
+    if (scroll & V2D_SCROLL_HORIZONTAL) {
+      if (IN_2D_HORIZ_SCROLL_RECT(v2d, &rect_region)) {
+        return 'h';
+      }
     }
-  }
-  if (scroll & V2D_SCROLL_VERTICAL) {
-    if (IN_2D_VERT_SCROLL_RECT(v2d, &rect_region)) {
-      return 'v';
+    if (scroll & V2D_SCROLL_VERTICAL) {
+      if (IN_2D_VERT_SCROLL_RECT(v2d, &rect_region)) {
+        return 'v';
+      }
     }
   }
 
-  /* not found */
   return 0;
 }