blender-archive/source/blender/blenkernel/BKE_library_remap.h

/*
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 */
#ifndef __BKE_LIBRARY_REMAP_H__
#define __BKE_LIBRARY_REMAP_H__

/** \file
 * \ingroup bke
 */
#ifdef __cplusplus
extern "C" {
#endif

#include "BLI_compiler_attrs.h"

/* BKE_libblock_free, delete are declared in BKE_library.h for convenience. */

/* Also IDRemap->flag. */
enum {
	/* Do not remap indirect usages of IDs (that is, when user is some linked data). */
	ID_REMAP_SKIP_INDIRECT_USAGE    = 1 << 0,
	/* This flag should always be set, *except for 'unlink' scenarios* (only relevant when new_id == NULL).
	 * Basically, when unset, NEVER_NULL ID usages will keep pointing to old_id, but (if needed) old_id user count
	 * will still be decremented. This is mandatory for 'delete ID' case, but in all other situation this would lead
	 * to invalid user counts! */
	ID_REMAP_SKIP_NEVER_NULL_USAGE  = 1 << 1,
	/* This tells the callback func to flag with LIB_DOIT all IDs using target one with a 'never NULL' pointer
	 * (like e.g. Object->data). */
	ID_REMAP_FLAG_NEVER_NULL_USAGE  = 1 << 2,
	/* This tells the callback func to force setting IDs using target one with a 'never NULL' pointer to NULL.
	 * WARNING! Use with extreme care, this will leave database in broken state and can cause crashes very easily! */
	ID_REMAP_FORCE_NEVER_NULL_USAGE = 1 << 3,
	/* Do not consider proxy/_group pointers of local objects as indirect usages...
	 * Our oh-so-beloved proxies again... Do not consider data used by local proxy object as indirect usage.
	 * This is needed e.g. in reload scenario, since we have to ensure remapping of Armature data of local proxy
	 * is also performed. Usual nightmare... */
	ID_REMAP_NO_INDIRECT_PROXY_DATA_USAGE = 1 << 4,
	/* Do not remap static override pointers. */
	ID_REMAP_SKIP_STATIC_OVERRIDE = 1 << 5,
};

/* Note: Requiring new_id to be non-null, this *may* not be the case ultimately, but makes things simpler for now. */
void BKE_libblock_remap_locked(
        struct Main *bmain, void *old_idv, void *new_idv,
        const short remap_flags) ATTR_NONNULL(1, 2);
void BKE_libblock_remap(
        struct Main *bmain, void *old_idv, void *new_idv,
        const short remap_flags) ATTR_NONNULL(1, 2);

void BKE_libblock_unlink(
        struct Main *bmain, void *idv,
        const bool do_flag_never_null, const bool do_skip_indirect) ATTR_NONNULL();

void BKE_libblock_relink_ex(
        struct Main *bmain, void *idv, void *old_idv, void *new_idv,
        const bool us_min_never_null) ATTR_NONNULL(1, 2);

void  BKE_libblock_relink_to_newid(struct ID *id) ATTR_NONNULL();

typedef void (*BKE_library_free_window_manager_cb)(struct bContext *, struct wmWindowManager *);
typedef void (*BKE_library_free_notifier_reference_cb)(const void *);
typedef void (*BKE_library_remap_editor_id_reference_cb)(struct ID *, struct ID *);

void BKE_library_callback_free_window_manager_set(BKE_library_free_window_manager_cb func);
void BKE_library_callback_free_notifier_reference_set(BKE_library_free_notifier_reference_cb func);
void BKE_library_callback_remap_editor_id_reference_set(BKE_library_remap_editor_id_reference_cb func);

#ifdef __cplusplus
}
#endif

#endif  /* __BKE_LIBRARY_REMAP_H__ */