110 lines
3.9 KiB
C
110 lines
3.9 KiB
C
/*
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* ***** BEGIN GPL LICENSE BLOCK *****
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* The Original Code is Copyright (C) 2014 by Blender Foundation.
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* All rights reserved.
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*
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* Contributor(s): Sergey SHarybin.
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*
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* ***** END GPL LICENSE BLOCK *****
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*/
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#ifndef __BKE_LIBRARY_QUERY_H__
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#define __BKE_LIBRARY_QUERY_H__
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/** \file BKE_library_query.h
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* \ingroup bke
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* \since March 2014
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* \author sergey
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*/
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struct ID;
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struct Main;
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/* Tips for the callback for cases it's gonna to modify the pointer. */
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enum {
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IDWALK_CB_NOP = 0,
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IDWALK_CB_NEVER_NULL = (1 << 0),
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IDWALK_CB_NEVER_SELF = (1 << 1),
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/**
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* Indicates whether this is direct (i.e. by local data) or indirect (i.e. by linked data) usage.
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* \note Object proxies are half-local, half-linked...
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*/
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IDWALK_CB_INDIRECT_USAGE = (1 << 2),
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/** That ID is used as mere sub-data by its owner
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* (only case currently: those f***ing nodetrees in materials etc.).
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* This means callback shall not *do* anything, only use this as informative data if it needs it. */
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IDWALK_CB_PRIVATE = (1 << 3),
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/** That ID is not really used by its owner, it's just an internal hint/helper.
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* This addresses Their Highest Ugliness the 'from' pointers: Object->from_proxy and Key->from.
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* How to handle that kind of cases totally depends on what caller code is doing... */
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IDWALK_CB_LOOPBACK = (1 << 4),
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/** That ID is used as static override's reference by its owner. */
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IDWALK_CB_STATIC_OVERRIDE_REFERENCE = (1 << 5),
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/**
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* Adjusts #ID.us reference-count.
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* \note keep in sync with 'newlibadr_us' use in readfile.c
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*/
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IDWALK_CB_USER = (1 << 8),
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/** Ensure #ID.us is at least 1 on use. */
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IDWALK_CB_USER_ONE = (1 << 9),
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};
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enum {
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IDWALK_RET_NOP = 0,
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IDWALK_RET_STOP_ITER = 1 << 0, /* Completly stop iteration. */
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IDWALK_RET_STOP_RECURSION = 1 << 1, /* Stop recursion, that is, do not loop over ID used by current one. */
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};
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/**
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* Call a callback for each ID link which the given ID uses.
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*
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* \return a set of flags to control further iteration (0 to keep going).
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*/
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typedef int (*LibraryIDLinkCallback) (void *user_data, struct ID *id_self, struct ID **id_pointer, int cb_flag);
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/* Flags for the foreach function itself. */
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enum {
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IDWALK_NOP = 0,
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IDWALK_READONLY = (1 << 0),
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IDWALK_RECURSE = (1 << 1), /* Also implies IDWALK_READONLY. */
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IDWALK_NO_INDIRECT_PROXY_DATA_USAGE = (1 << 8), /* Ugly special case :(((( */
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};
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/* Loop over all of the ID's this datablock links to. */
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void BKE_library_foreach_ID_link(
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struct Main *bmain, struct ID *id, LibraryIDLinkCallback callback, void *user_data, int flag);
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void BKE_library_update_ID_link_user(struct ID *id_dst, struct ID *id_src, const int cb_flag);
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int BKE_library_ID_use_ID(struct ID *id_user, struct ID *id_used);
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bool BKE_library_id_can_use_idtype(struct ID *id_owner, const short id_type_used);
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bool BKE_library_ID_is_locally_used(struct Main *bmain, void *idv);
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bool BKE_library_ID_is_indirectly_used(struct Main *bmain, void *idv);
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void BKE_library_ID_test_usages(struct Main *bmain, void *idv, bool *is_used_local, bool *is_used_linked);
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void BKE_library_unused_linked_data_set_tag(struct Main *bmain, const bool do_init_tag);
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void BKE_library_indirectly_used_data_tag_clear(struct Main *bmain);
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#endif /* __BKE_LIBRARY_QUERY_H__ */
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