App Settings: Edge Resize

This prevents both editor resize as well as regions (e.g., the toolbar).

Note: This option is not visible in the UI.

Differential Revision: D12516

source/blender/editors/screen/area.c

@@ -1062,6 +1062,10 @@ static bool region_azone_edge_poll(const ARegion *region, const bool is_fullscre
     return false;
   }
 
+  if (!is_hidden && (U.app_flag & USER_APP_LOCK_EDGE_RESIZE)) {
+    return false;
+  }
+
   return true;
 }
 

source/blender/editors/screen/screen_geometry.c

@@ -130,6 +130,10 @@ ScrEdge *screen_geom_find_active_scredge(const wmWindow *win,
                                          const int mx,
                                          const int my)
 {
+  if (U.app_flag & USER_APP_LOCK_EDGE_RESIZE) {
+    return NULL;
+  }
+
   /* Use layout size (screen excluding global areas) for screen-layout area edges */
   rcti screen_rect;
   WM_window_screen_rect_calc(win, &screen_rect);

source/blender/makesdna/DNA_userdef_types.h

@@ -1137,6 +1137,7 @@ typedef enum eUserpref_TableAPI {
 typedef enum eUserpref_APP_Flag {
   USER_APP_LOCK_CORNER_SPLIT = (1 << 0),
   USER_APP_HIDE_REGION_TOGGLE = (1 << 1),
+  USER_APP_LOCK_EDGE_RESIZE = (1 << 2),
 } eUserpref_APP_Flag;
 
 /** #UserDef.statusbar_flag */

source/blender/makesrna/intern/rna_userdef.c

@@ -6246,6 +6246,11 @@ static void rna_def_userdef_apps(BlenderRNA *brna)
       prop, "Corner Splitting", "Split and join editors by dragging from corners");
   RNA_def_property_update(prop, 0, "rna_userdef_screen_update");
 
+  prop = RNA_def_property(srna, "show_edge_resize", PROP_BOOLEAN, PROP_NONE);
+  RNA_def_property_boolean_negative_sdna(prop, NULL, "app_flag", USER_APP_LOCK_EDGE_RESIZE);
+  RNA_def_property_ui_text(prop, "Edge Resize", "Resize editors by dragging from the edges");
+  RNA_def_property_update(prop, 0, "rna_userdef_screen_update");
+
   prop = RNA_def_property(srna, "show_regions_visibility_toggle", PROP_BOOLEAN, PROP_NONE);
   RNA_def_property_boolean_negative_sdna(prop, NULL, "app_flag", USER_APP_HIDE_REGION_TOGGLE);
   RNA_def_property_ui_text(