Fix #112618: many Outliner operators crash running without a region

This could happen when e.g. overriding context with just the area.

Now add poll functions that check for an active region when running
operators that require a region.

The fix is similar to 72688791dc

Alternatively, we could have a fix similar to a8892c7264 (getting the
correct region from the area), this would require less setup by
scripters, however for some operators the usage of the region is a
little further down the line, so implementation would be a bit more
involved. Also: for some of the operators, this would have to be done in
both `invoke` and `exec` (so would be more duplicate code changes).

Pull Request: https://projects.blender.org/blender/blender/pulls/119696

source/blender/editors/include/ED_screen.hh

@@ -508,6 +508,7 @@ bool ED_operator_region_gizmo_active(bContext *C);
  */
 bool ED_operator_animview_active(bContext *C);
 bool ED_operator_outliner_active(bContext *C);
+bool ED_operator_region_outliner_active(bContext *C);
 bool ED_operator_outliner_active_no_editobject(bContext *C);
 /**
  * \note Will return true for file spaces in either file or asset browsing mode! See

source/blender/editors/screen/screen_ops.cc

@@ -283,6 +283,20 @@ bool ED_operator_outliner_active(bContext *C)
   return ed_spacetype_test(C, SPACE_OUTLINER);
 }
 
+bool ED_operator_region_outliner_active(bContext *C)
+{
+  if (!ED_operator_outliner_active(C)) {
+    CTX_wm_operator_poll_msg_set(C, "Expected an active Outliner");
+    return false;
+  }
+  const ARegion *region = CTX_wm_region(C);
+  if (!(region && region->regiontype == RGN_TYPE_WINDOW)) {
+    CTX_wm_operator_poll_msg_set(C, "Expected an Outliner region");
+    return false;
+  }
+  return true;
+}
+
 bool ED_operator_outliner_active_no_editobject(bContext *C)
 {
   if (ed_spacetype_test(C, SPACE_OUTLINER)) {

source/blender/editors/space_outliner/outliner_collections.cc

@@ -184,6 +184,17 @@ static bool collection_edit_in_active_scene_poll(bContext *C)
   return true;
 }
 
+static bool collection_new_poll(bContext *C)
+{
+  if (!ED_operator_region_outliner_active(C)) {
+    return false;
+  }
+  if (!collection_edit_in_active_scene_poll(C)) {
+    return false;
+  }
+  return true;
+}
+
 /** \} */
 
 /* -------------------------------------------------------------------- */
@@ -269,7 +280,7 @@ void OUTLINER_OT_collection_new(wmOperatorType *ot)
 
   /* api callbacks */
   ot->exec = collection_new_exec;
-  ot->poll = collection_edit_in_active_scene_poll;
+  ot->poll = collection_new_poll;
 
   /* flags */
   ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;

source/blender/editors/space_outliner/outliner_dragdrop.cc

@@ -451,7 +451,7 @@ void OUTLINER_OT_parent_drop(wmOperatorType *ot)
   /* api callbacks */
   ot->invoke = parent_drop_invoke;
 
-  ot->poll = ED_operator_outliner_active;
+  ot->poll = ED_operator_region_outliner_active;
 
   /* flags */
   ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO | OPTYPE_INTERNAL;
@@ -609,7 +609,7 @@ void OUTLINER_OT_scene_drop(wmOperatorType *ot)
   /* api callbacks */
   ot->invoke = scene_drop_invoke;
 
-  ot->poll = ED_operator_outliner_active;
+  ot->poll = ED_operator_region_outliner_active;
 
   /* flags */
   ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO | OPTYPE_INTERNAL;
@@ -662,7 +662,7 @@ void OUTLINER_OT_material_drop(wmOperatorType *ot)
   /* api callbacks */
   ot->invoke = material_drop_invoke;
 
-  ot->poll = ED_operator_outliner_active;
+  ot->poll = ED_operator_region_outliner_active;
 
   /* flags */
   ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO | OPTYPE_INTERNAL;

source/blender/editors/space_outliner/outliner_edit.cc

@@ -288,7 +288,7 @@ void OUTLINER_OT_item_openclose(wmOperatorType *ot)
   ot->invoke = outliner_item_openclose_invoke;
   ot->modal = outliner_item_openclose_modal;
 
-  ot->poll = ED_operator_outliner_active;
+  ot->poll = ED_operator_region_outliner_active;
 
   RNA_def_boolean(ot->srna, "all", false, "All", "Close or open all items");
 }
@@ -438,7 +438,7 @@ void OUTLINER_OT_item_rename(wmOperatorType *ot)
 
   ot->invoke = outliner_item_rename_invoke;
 
-  ot->poll = ED_operator_outliner_active;
+  ot->poll = ED_operator_region_outliner_active;
 
   /* Flags. */
   ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
@@ -590,7 +590,7 @@ void OUTLINER_OT_id_delete(wmOperatorType *ot)
   ot->description = "Delete the ID under cursor";
 
   ot->invoke = outliner_id_delete_invoke;
-  ot->poll = ED_operator_outliner_active;
+  ot->poll = ED_operator_region_outliner_active;
 
   /* Flags. */
   ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
@@ -729,7 +729,7 @@ void OUTLINER_OT_id_remap(wmOperatorType *ot)
   /* callbacks */
   ot->invoke = outliner_id_remap_invoke;
   ot->exec = outliner_id_remap_exec;
-  ot->poll = ED_operator_outliner_active;
+  ot->poll = ED_operator_region_outliner_active;
 
   /* Flags. */
   ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
@@ -990,7 +990,7 @@ void OUTLINER_OT_lib_relocate(wmOperatorType *ot)
   ot->description = "Relocate the library under cursor";
 
   ot->invoke = outliner_lib_relocate_invoke;
-  ot->poll = ED_operator_outliner_active;
+  ot->poll = ED_operator_region_outliner_active;
 
   /* Flags. */
   ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
@@ -1047,7 +1047,7 @@ void OUTLINER_OT_lib_reload(wmOperatorType *ot)
   ot->description = "Reload the library under cursor";
 
   ot->invoke = outliner_lib_reload_invoke;
-  ot->poll = ED_operator_outliner_active;
+  ot->poll = ED_operator_region_outliner_active;
 
   /* Flags. */
   ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
@@ -1177,7 +1177,7 @@ void OUTLINER_OT_expanded_toggle(wmOperatorType *ot)
 
   /* callbacks */
   ot->exec = outliner_toggle_expanded_exec;
-  ot->poll = ED_operator_outliner_active;
+  ot->poll = ED_operator_region_outliner_active;
 
   /* no undo or registry, UI option */
 }
@@ -1379,7 +1379,7 @@ void OUTLINER_OT_show_active(wmOperatorType *ot)
 
   /* callbacks */
   ot->exec = outliner_show_active_exec;
-  ot->poll = ED_operator_outliner_active;
+  ot->poll = ED_operator_region_outliner_active;
 }
 
 /** \} */
@@ -1418,7 +1418,7 @@ void OUTLINER_OT_scroll_page(wmOperatorType *ot)
 
   /* callbacks */
   ot->exec = outliner_scroll_page_exec;
-  ot->poll = ED_operator_outliner_active;
+  ot->poll = ED_operator_region_outliner_active;
 
   /* properties */
   prop = RNA_def_boolean(ot->srna, "up", false, "Up", "Scroll up one page");
@@ -1490,7 +1490,7 @@ void OUTLINER_OT_show_one_level(wmOperatorType *ot)
 
   /* callbacks */
   ot->exec = outliner_one_level_exec;
-  ot->poll = ED_operator_outliner_active;
+  ot->poll = ED_operator_region_outliner_active;
 
   /* no undo or registry, UI option */
 
@@ -1583,7 +1583,8 @@ void OUTLINER_OT_show_hierarchy(wmOperatorType *ot)
 
   /* callbacks */
   ot->exec = outliner_show_hierarchy_exec;
-  ot->poll = ED_operator_outliner_active; /* TODO: shouldn't be allowed in RNA views... */
+  /* TODO: shouldn't be allowed in RNA views... */
+  ot->poll = ED_operator_region_outliner_active;
 
   /* no undo or registry, UI option */
 }

source/blender/editors/space_outliner/outliner_select.cc

@@ -1900,7 +1900,7 @@ void OUTLINER_OT_item_activate(wmOperatorType *ot)
 
   ot->invoke = outliner_item_activate_invoke;
 
-  ot->poll = ED_operator_outliner_active;
+  ot->poll = ED_operator_region_outliner_active;
 
   ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
 
@@ -2008,7 +2008,7 @@ void OUTLINER_OT_select_box(wmOperatorType *ot)
   ot->modal = WM_gesture_box_modal;
   ot->cancel = WM_gesture_box_cancel;
 
-  ot->poll = ED_operator_outliner_active;
+  ot->poll = ED_operator_region_outliner_active;
 
   /* flags */
   ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;

source/blender/editors/space_outliner/outliner_tools.cc

@@ -3806,7 +3806,7 @@ void OUTLINER_OT_operation(wmOperatorType *ot)
 
   ot->invoke = outliner_operation_invoke;
 
-  ot->poll = ED_operator_outliner_active;
+  ot->poll = ED_operator_region_outliner_active;
 }
 
 /** \} */