Refactor getting constraints

This is the refactoring part of D8805 (should be no functional changes).

- exposes pose-related part of former 'get_constraints()' from
interface_templates.c to new ED_object_pose_constraint_list
- rename ED_object_constraint_list_from_context -->
ED_object_constraint_active_list

Also clarify comments on both of these.

ref T80464
ref https://developer.blender.org/D8805

source/blender/editors/include/ED_object.h

@@ -310,7 +310,8 @@ void ED_objects_recalculate_paths(struct bContext *C,
                                   eObjectPathCalcRange range);
 
 /* constraints */
-struct ListBase *ED_object_constraint_list_from_context(struct Object *ob);
+struct ListBase *ED_object_constraint_active_list(struct Object *ob);
+struct ListBase *ED_object_pose_constraint_list(const struct bContext *C);
 struct ListBase *ED_object_constraint_list_from_constraint(struct Object *ob,
                                                            struct bConstraint *con,
                                                            struct bPoseChannel **r_pchan);

source/blender/editors/interface/interface_templates.c

@@ -1950,18 +1950,13 @@ static bool constraint_panel_is_bone(Panel *panel)
  */
 static ListBase *get_constraints(const bContext *C, bool use_bone_constraints)
 {
-  ListBase *constraints = {NULL};
+  ListBase *constraints = NULL;
   if (use_bone_constraints) {
-    bPoseChannel *pose_bone = CTX_data_pointer_get(C, "pose_bone").data;
-    if (pose_bone != NULL) {
-      constraints = &pose_bone->constraints;
-    }
+    constraints = ED_object_pose_constraint_list(C);
   }
   else {
     Object *ob = ED_object_active_context(C);
-    if (ob != NULL) {
-      constraints = &ob->constraints;
-    }
+    constraints = ED_object_constraint_active_list(ob);
   }
   return constraints;
 }
@@ -2043,7 +2038,13 @@ void uiTemplateConstraints(uiLayout *UNUSED(layout), bContext *C, bool use_bone_
   ARegion *region = CTX_wm_region(C);
 
   Object *ob = ED_object_active_context(C);
-  ListBase *constraints = get_constraints(C, use_bone_constraints);
+  ListBase *constraints = {NULL};
+  if (use_bone_constraints) {
+    constraints = ED_object_pose_constraint_list(C);
+  }
+  else {
+    constraints = ED_object_constraint_active_list(ob);
+  }
 
   /* Switch between the bone panel ID function and the object panel ID function. */
   uiListPanelIDFromDataFunc panel_id_func = use_bone_constraints ? bone_constraint_panel_id :

source/blender/editors/object/object_constraint.c

@@ -80,8 +80,9 @@
 /** \name Constraint Data Accessors
  * \{ */
 
-/* if object in posemode, active bone constraints, else object constraints */
-ListBase *ED_object_constraint_list_from_context(Object *ob)
+/* If object is in posemode, return active bone constraints, else object constraints. No
+ * constraints are returned for a bone on an inactive bonelayer. */
+ListBase *ED_object_constraint_active_list(Object *ob)
 {
   if (ob == NULL) {
     return NULL;
@@ -102,6 +103,18 @@ ListBase *ED_object_constraint_list_from_context(Object *ob)
   return NULL;
 }
 
+/* Get the constraints for the active pose bone. Bone may be on an inactive bonelayer (unlike
+ * ED_object_constraint_active_list, such constraints are not excluded here). */
+ListBase *ED_object_pose_constraint_list(const bContext *C)
+{
+  bPoseChannel *pose_bone = CTX_data_pointer_get(C, "pose_bone").data;
+  if (pose_bone == NULL) {
+    return NULL;
+  }
+
+  return &pose_bone->constraints;
+}
+
 /* Find the list that a given constraint belongs to,
  * and/or also get the posechannel this is from (if applicable) */
 ListBase *ED_object_constraint_list_from_constraint(Object *ob,
@@ -147,7 +160,7 @@ ListBase *ED_object_constraint_list_from_constraint(Object *ob,
 /* single constraint */
 bConstraint *ED_object_constraint_active_get(Object *ob)
 {
-  return BKE_constraints_active_get(ED_object_constraint_list_from_context(ob));
+  return BKE_constraints_active_get(ED_object_constraint_active_list(ob));
 }
 
 /** \} */
@@ -813,7 +826,7 @@ static bConstraint *edit_constraint_property_get(wmOperator *op, Object *ob, int
       printf("edit_constraint_property_get: defaulting to getting list in the standard way\n");
     }
 #endif
-    list = ED_object_constraint_list_from_context(ob);
+    list = ED_object_constraint_active_list(ob);
   }
 
   con = BKE_constraints_find_name(list, constraint_name);
@@ -2162,8 +2175,7 @@ static int pose_constraint_add_exec(bContext *C, wmOperator *op)
     with_targets = 1;
   }
 
-  return constraint_add_exec(
-      C, op, ob, ED_object_constraint_list_from_context(ob), type, with_targets);
+  return constraint_add_exec(C, op, ob, ED_object_constraint_active_list(ob), type, with_targets);
 }
 
 /* ------------------ */
@@ -2364,12 +2376,8 @@ static int pose_ik_add_exec(bContext *C, wmOperator *op)
 
   /* add the constraint - all necessary checks should have
    * been done by the invoke() callback already... */
-  return constraint_add_exec(C,
-                             op,
-                             ob,
-                             ED_object_constraint_list_from_context(ob),
-                             CONSTRAINT_TYPE_KINEMATIC,
-                             with_targets);
+  return constraint_add_exec(
+      C, op, ob, ED_object_constraint_active_list(ob), CONSTRAINT_TYPE_KINEMATIC, with_targets);
 }
 
 void POSE_OT_ik_add(wmOperatorType *ot)

source/blender/io/collada/BCAnimationSampler.cpp

@@ -271,7 +271,7 @@ void BCAnimationSampler::find_depending_animated(std::set<Object *> &animated_ob
     std::set<Object *>::iterator it;
     for (it = candidates.begin(); it != candidates.end(); ++it) {
       Object *cob = *it;
-      ListBase *conlist = ED_object_constraint_list_from_context(cob);
+      ListBase *conlist = ED_object_constraint_active_list(cob);
       if (is_animated_by_constraint(cob, conlist, animated_objects)) {
         animated_objects.insert(cob);
         candidates.erase(cob);