'users of ID' py API.

This mainly adds bpy.data.user_map() method, which goes over the whole Main database
to build a mapping (dict) {ID: {users_of_that_ID}}.

Very handy to check and debug ID usages, but could also be really valuable for py addons
creating temporary scenes, or some exporters, etc.

Note: current code in master's libquery misses some IDs (and reports some it should not,
like nodetrees), this is fixed in id-remap but still needs serious review before going to master.
This basically means that current bpy.data.user_map() **will not** report a complete and exhaustive
state of dependencies between IDs. Should work OK in most cases though.

Original work/idea comes from id-remap branch, was heavily reworked by @campbellbarton
and myself for master.

Reviewers: campbellbarton, sergey

Differential Revision: https://developer.blender.org/D1678

1 files changed, 32 insertions, 0 deletions

diff --git a/source/blender/python/intern/bpy_rna_id_collection.h b/source/blender/python/intern/bpy_rna_id_collection.h
new file mode 100644
index 00000000000..c293289c821
--- /dev/null
+++ b/source/blender/python/intern/bpy_rna_id_collection.h
@@ -0,0 +1,32 @@
+/*
+ * ***** BEGIN GPL LICENSE BLOCK *****
+ *
+ * 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.
+ *
+ * Contributor(s): Bastien Montagne
+ *
+ * ***** END GPL LICENSE BLOCK *****
+ */
+
+/** \file blender/python/intern/bpy_rna_id_collection.h
+ *  \ingroup pythonintern
+ */
+
+#ifndef __BPY_RNA_ID_COLLECTION_H__
+#define __BPY_RNA_ID_COLLECTION_H__
+
+int BPY_rna_id_collection_module(PyObject *);
+
+#endif  /* __BPY_RNA_ID_COLLECTION_H__ */