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/*
* ***** 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.
*
* ***** END GPL LICENSE BLOCK *****
*/
/** \file blender/editors/metaball/editmball_undo.c
* \ingroup edmeta
*/
#include <math.h>
#include <string.h>
#include "MEM_guardedalloc.h"
#include "BLI_utildefines.h"
#include "BLI_listbase.h"
#include "DNA_defs.h"
#include "DNA_meta_types.h"
#include "DNA_object_types.h"
#include "BKE_context.h"
#include "ED_mball.h"
#include "ED_util.h"
typedef struct UndoMBall {
ListBase editelems;
int lastelem_index;
} UndoMBall;
/* free all MetaElems from ListBase */
static void freeMetaElemlist(ListBase *lb)
{
MetaElem *ml;
if (lb == NULL) {
return;
}
while ((ml = BLI_pophead(lb))) {
MEM_freeN(ml);
}
}
static void undoMball_to_editMball(void *umb_v, void *mb_v, void *UNUSED(obdata))
{
MetaBall *mb = mb_v;
UndoMBall *umb = umb_v;
freeMetaElemlist(mb->editelems);
mb->lastelem = NULL;
/* copy 'undo' MetaElems to 'edit' MetaElems */
int index = 0;
for (MetaElem *ml_undo = umb->editelems.first; ml_undo; ml_undo = ml_undo->next, index += 1) {
MetaElem *ml_edit = MEM_dupallocN(ml_undo);
BLI_addtail(mb->editelems, ml_edit);
if (index == umb->lastelem_index) {
mb->lastelem = ml_edit;
}
}
}
static void *editMball_to_undoMball(void *mb_v, void *UNUSED(obdata))
{
MetaBall *mb = mb_v;
UndoMBall *umb;
/* allocate memory for undo ListBase */
umb = MEM_callocN(sizeof(UndoMBall), __func__);
umb->lastelem_index = -1;
/* copy contents of current ListBase to the undo ListBase */
int index = 0;
for (MetaElem *ml_edit = mb->editelems->first; ml_edit; ml_edit = ml_edit->next, index += 1) {
MetaElem *ml_undo = MEM_dupallocN(ml_edit);
BLI_addtail(&umb->editelems, ml_undo);
if (ml_edit == mb->lastelem) {
umb->lastelem_index = index;
}
}
return umb;
}
/* free undo ListBase of MetaElems */
static void free_undoMball(void *umb_v)
{
UndoMBall *umb = umb_v;
freeMetaElemlist(&umb->editelems);
MEM_freeN(umb);
}
static MetaBall *metaball_get_obdata(Object *ob)
{
if (ob && ob->type == OB_MBALL) {
return ob->data;
}
return NULL;
}
static void *get_data(bContext *C)
{
Object *obedit = CTX_data_edit_object(C);
return metaball_get_obdata(obedit);
}
/* this is undo system for MetaBalls */
void undo_push_mball(bContext *C, const char *name)
{
undo_editmode_push(C, name, get_data, free_undoMball, undoMball_to_editMball, editMball_to_undoMball, NULL);
}
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