lib_override_proxy_conversion.cc

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/* SPDX-FileCopyrightText: 2016 Blender Authors
 *
 * SPDX-License-Identifier: GPL-2.0-or-later */
 
#include "CLG_log.h"
 
#include "MEM_guardedalloc.h"
 
#include "BLI_linklist.h"
 
/* Required for proxy to liboverrides conversion code. */
#define DNA_DEPRECATED_ALLOW
 
#include "DNA_ID.h"
#include "DNA_collection_types.h"
#include "DNA_object_types.h"
#include "DNA_scene_types.h"
 
#include "DEG_depsgraph.hh"
 
#include "BKE_collection.hh"
#include "BKE_idtype.hh"
#include "BKE_lib_id.hh"
#include "BKE_lib_override.hh"
#include "BKE_main.hh"
 
#include "BLO_readfile.hh"
 
static CLG_LogRef LOG = {"bke.liboverride_proxy_conversion"};
 
bool BKE_lib_override_library_proxy_convert(Main *bmain,
                                            Scene *scene,
                                            ViewLayer *view_layer,
                                            Object *ob_proxy)
{
  /* `proxy_group`, if defined, is the empty instantiating the collection from which the proxy is
   * coming. */
  Object *ob_proxy_group = ob_proxy->proxy_group;
  const bool is_override_instancing_object = (ob_proxy_group != nullptr) &&
                                             (ob_proxy_group->instance_collection != nullptr);
  ID *id_root = is_override_instancing_object ? &ob_proxy_group->instance_collection->id :
                                                &ob_proxy->proxy->id;
  ID *id_instance_hint = is_override_instancing_object ? &ob_proxy_group->id : &ob_proxy->id;
 
  /* In some cases the instance collection of a proxy object may be local (see e.g. #83875). Not
   * sure this is a valid state, but for now just abort the overriding process. */
  if (!ID_IS_OVERRIDABLE_LIBRARY_HIERARCHY(id_root)) {
    if (ob_proxy->proxy != nullptr) {
      ob_proxy->proxy->proxy_from = nullptr;
    }
    id_us_min((ID *)ob_proxy->proxy);
    ob_proxy->proxy = ob_proxy->proxy_group = nullptr;
    return false;
  }
 
  /* We manually convert the proxy object into a library override, further override handling will
   * then be handled by `BKE_lib_override_library_create()` just as for a regular override
   * creation.
   */
  ob_proxy->proxy->id.tag |= ID_TAG_DOIT;
  ob_proxy->proxy->id.newid = &ob_proxy->id;
  BKE_lib_override_library_init(&ob_proxy->id, &ob_proxy->proxy->id);
  ob_proxy->id.override_library->flag &= ~LIBOVERRIDE_FLAG_SYSTEM_DEFINED;
 
  ob_proxy->proxy->proxy_from = nullptr;
  ob_proxy->proxy = ob_proxy->proxy_group = nullptr;
 
  DEG_id_tag_update(&ob_proxy->id, ID_RECALC_SYNC_TO_EVAL);
 
  /* In case of proxy conversion, remap all local ID usages to linked IDs to their newly created
   * overrides. Also do that for the IDs from the same lib as the proxy in case it is linked.
   * While this might not be 100% the desired behavior, it is likely to be the case most of the
   * time. Ref: #91711. */
  ID *id_iter;
  FOREACH_MAIN_ID_BEGIN (bmain, id_iter) {
    if (!ID_IS_LINKED(id_iter) || id_iter->lib == ob_proxy->id.lib) {
      id_iter->tag |= ID_TAG_DOIT;
    }
  }
  FOREACH_MAIN_ID_END;
 
  return BKE_lib_override_library_create(bmain,
                                         scene,
                                         view_layer,
                                         ob_proxy->id.lib,
                                         id_root,
                                         id_root,
                                         id_instance_hint,
                                         nullptr,
                                         false);
}
 
static void lib_override_library_proxy_convert_do(Main *bmain,
                                                  Scene *scene,
                                                  Object *ob_proxy,
                                                  BlendFileReadReport *reports)
{
  Object *ob_proxy_group = ob_proxy->proxy_group;
  const bool is_override_instancing_object = ob_proxy_group != nullptr;
 
  const bool success = BKE_lib_override_library_proxy_convert(bmain, scene, nullptr, ob_proxy);
 
  if (success) {
    CLOG_INFO(&LOG,
              4,
              "Proxy object '%s' successfully converted to library overrides",
              ob_proxy->id.name);
    /* Remove the instance empty from this scene, the items now have an overridden collection
     * instead. */
    if (is_override_instancing_object) {
      BKE_scene_collections_object_remove(bmain, scene, ob_proxy_group, true);
    }
    reports->count.proxies_to_lib_overrides_success++;
  }
}
 
void BKE_lib_override_library_main_proxy_convert(Main *bmain, BlendFileReadReport *reports)
{
  LISTBASE_FOREACH (Scene *, scene, &bmain->scenes) {
    LinkNodePair proxy_objects = {nullptr};
 
    FOREACH_SCENE_OBJECT_BEGIN (scene, object) {
      if (object->proxy_group != nullptr) {
        BLI_linklist_append(&proxy_objects, object);
      }
    }
    FOREACH_SCENE_OBJECT_END;
 
    FOREACH_SCENE_OBJECT_BEGIN (scene, object) {
      if (object->proxy != nullptr && object->proxy_group == nullptr) {
        BLI_linklist_append(&proxy_objects, object);
      }
    }
    FOREACH_SCENE_OBJECT_END;
 
    for (LinkNode *proxy_object_iter = proxy_objects.list; proxy_object_iter != nullptr;
         proxy_object_iter = proxy_object_iter->next)
    {
      Object *proxy_object = static_cast<Object *>(proxy_object_iter->link);
      lib_override_library_proxy_convert_do(bmain, scene, proxy_object, reports);
    }
 
    BLI_linklist_free(proxy_objects.list, nullptr);
  }
 
  LISTBASE_FOREACH (Object *, object, &bmain->objects) {
    if (object->proxy_group != nullptr || object->proxy != nullptr) {
      if (ID_IS_LINKED(object)) {
        CLOG_WARN(&LOG,
                  "Linked proxy object '%s' from '%s' failed to be converted to library override",
                  object->id.name + 2,
                  object->id.lib->filepath);
      }
      else {
        CLOG_WARN(&LOG,
                  "Proxy object '%s' failed to be converted to library override",
                  object->id.name + 2);
      }
      reports->count.proxies_to_lib_overrides_failures++;
      if (object->proxy != nullptr) {
        object->proxy->proxy_from = nullptr;
      }
      id_us_min((ID *)object->proxy);
      object->proxy = object->proxy_group = nullptr;
    }
  }
}