ID Duplicate: uniformize Action duplication.

Previously, object (and sub-data) actions would be controlled by the
user preferences flag, collections actions would never be duplicted, and
scenes actions were always duplicated...

Now they all follow the user preferences settings.

source/blender/blenkernel/intern/anim_data.c

@@ -399,6 +399,8 @@ void BKE_animdata_copy_id_action(Main *bmain, ID *id, const bool set_newid)
   if (ntree) {
     BKE_animdata_copy_id_action(bmain, &ntree->id, set_newid);
   }
+  /* Note that collections are not animatable currently, so no need to handle scenes' master
+   * collection here. */
 }
 
 /* Merge copies of the data from the src AnimData into the destination AnimData */

source/blender/blenkernel/intern/collection.c

@@ -28,6 +28,7 @@
 #include "BLI_threads.h"
 #include "BLT_translation.h"
 
+#include "BKE_anim_data.h"
 #include "BKE_collection.h"
 #include "BKE_icons.h"
 #include "BKE_idprop.h"
@@ -350,6 +351,11 @@ static Collection *collection_duplicate_recursive(Main *bmain,
     id_us_min(&collection_new->id);
 
     ID_NEW_SET(collection_old, collection_new);
+
+    if (duplicate_flags & USER_DUP_ACT) {
+      BKE_animdata_copy_id_action(bmain, &collection_new->id, true);
+    }
+
     do_full_process = true;
   }
   else {

source/blender/blenkernel/intern/object.c

@@ -1771,7 +1771,7 @@ Object *BKE_object_duplicate(Main *bmain,
   }
 
   Material ***matarar;
-  ID *id, *id_new;
+  ID *id, *id_new = NULL;
   int a;
   const bool is_object_liboverride = ID_IS_OVERRIDE_LIBRARY(ob);
 
@@ -1958,6 +1958,8 @@ Object *BKE_object_duplicate(Main *bmain,
 
   /* Check if obdata is copied. */
   if (duplicated_obdata) {
+    BLI_assert(id_new != NULL);
+
     Key *key = BKE_key_from_object(obn);
 
     Key *oldkey = BKE_key_from_object(ob);

source/blender/blenkernel/intern/scene.c

@@ -822,10 +822,16 @@ Scene *BKE_scene_duplicate(Main *bmain, Scene *sce, eSceneCopyMethod type)
     return sce_copy;
   }
   else {
-    BKE_id_copy_ex(bmain, (ID *)sce, (ID **)&sce_copy, LIB_ID_COPY_ACTIONS);
+    const eDupli_ID_Flags duplicate_flags = U.dupflag | USER_DUP_OBJECT;
+
+    BKE_id_copy(bmain, (ID *)sce, (ID **)&sce_copy);
     id_us_min(&sce_copy->id);
     id_us_ensure_real(&sce_copy->id);
 
+    if (duplicate_flags & USER_DUP_ACT) {
+      BKE_animdata_copy_id_action(bmain, &sce_copy->id, true);
+    }
+
     /* Extra actions, most notably SCE_FULL_COPY also duplicates several 'children' datablocks. */
 
     if (type == SCE_COPY_FULL) {
@@ -847,9 +853,12 @@ Scene *BKE_scene_duplicate(Main *bmain, Scene *sce, eSceneCopyMethod type)
             if (is_scene_liboverride && ID_IS_LINKED(id)) {
               continue;
             }
-            BKE_id_copy_ex(bmain, id, &id_new, LIB_ID_COPY_ACTIONS);
+            BKE_id_copy(bmain, id, &id_new);
             id_us_min(id_new);
             ID_NEW_SET(id, id_new);
+            if (duplicate_flags & USER_DUP_ACT) {
+              BKE_animdata_copy_id_action(bmain, id_new, true);
+            }
           }
         }
       }
@@ -858,9 +867,12 @@ Scene *BKE_scene_duplicate(Main *bmain, Scene *sce, eSceneCopyMethod type)
       id = &sce->world->id;
       if (id && id->newid == NULL) {
         if (!is_scene_liboverride || !ID_IS_LINKED(id)) {
-          BKE_id_copy_ex(bmain, id, &id_new, LIB_ID_COPY_ACTIONS);
+          BKE_id_copy(bmain, id, &id_new);
           id_us_min(id_new);
           ID_NEW_SET(id, id_new);
+          if (duplicate_flags & USER_DUP_ACT) {
+            BKE_animdata_copy_id_action(bmain, id_new, true);
+          }
         }
       }
 
@@ -868,9 +880,12 @@ Scene *BKE_scene_duplicate(Main *bmain, Scene *sce, eSceneCopyMethod type)
       id = &sce->gpd->id;
       if (id && id->newid == NULL) {
         if (!is_scene_liboverride || !ID_IS_LINKED(id)) {
-          BKE_id_copy_ex(bmain, id, &id_new, LIB_ID_COPY_ACTIONS);
+          BKE_id_copy(bmain, id, &id_new);
           id_us_min(id_new);
           ID_NEW_SET(id, id_new);
+          if (duplicate_flags & USER_DUP_ACT) {
+            BKE_animdata_copy_id_action(bmain, id_new, true);
+          }
         }
       }
 
@@ -879,7 +894,7 @@ Scene *BKE_scene_duplicate(Main *bmain, Scene *sce, eSceneCopyMethod type)
       BKE_collection_duplicate(bmain,
                                NULL,
                                sce_copy->master_collection,
-                               USER_DUP_OBJECT | U.dupflag,
+                               duplicate_flags,
                                LIB_ID_DUPLICATE_IS_SUBPROCESS);
 
       if (!is_subprocess) {

source/blender/makesrna/intern/rna_userdef.c

@@ -5044,7 +5044,7 @@ static void rna_def_userdef_edit(BlenderRNA *brna)
   prop = RNA_def_property(srna, "use_duplicate_action", PROP_BOOLEAN, PROP_NONE);
   RNA_def_property_boolean_sdna(prop, NULL, "dupflag", USER_DUP_ACT);
   RNA_def_property_ui_text(
-      prop, "Duplicate Action", "Causes actions to be duplicated with the object");
+      prop, "Duplicate Action", "Causes actions to be duplicated with the data-blocks");
 
   prop = RNA_def_property(srna, "use_duplicate_particle", PROP_BOOLEAN, PROP_NONE);
   RNA_def_property_boolean_sdna(prop, NULL, "dupflag", USER_DUP_PSYS);