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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 "BLI_array_utils.h"
#include "DNA_defs.h"
#include "DNA_meta_types.h"
#include "DNA_object_types.h"
#include "BKE_context.h"
#include "BKE_depsgraph.h"
#include "BKE_undo_system.h"
#include "ED_object.h"
#include "ED_mball.h"
#include "ED_util.h"
#include "WM_types.h"
#include "WM_api.h"
/* -------------------------------------------------------------------- */
/** \name Undo Conversion
* \{ */
typedef struct UndoMBall {
ListBase editelems;
int lastelem_index;
size_t undo_size;
} 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(UndoMBall *umb, MetaBall *mb)
{
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_from_undomball(UndoMBall *umb, MetaBall *mb)
{
BLI_assert(BLI_array_is_zeroed(umb, 1));
/* allocate memory for undo ListBase */
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;
}
umb->undo_size += sizeof(MetaElem);
}
return umb;
}
/* free undo ListBase of MetaElems */
static void undomball_free_data(UndoMBall *umb)
{
freeMetaElemlist(&umb->editelems);
}
static Object *editmball_object_from_context(bContext *C)
{
Object *obedit = CTX_data_edit_object(C);
if (obedit && obedit->type == OB_MBALL) {
MetaBall *mb = obedit->data;
if (mb->editelems != NULL) {
return obedit;
}
}
return NULL;
}
/** \} */
/* -------------------------------------------------------------------- */
/** \name Implements ED Undo System
* \{ */
typedef struct MBallUndoStep {
UndoStep step;
/* note: will split out into list for multi-object-editmode. */
UndoRefID_Object obedit_ref;
UndoMBall data;
} MBallUndoStep;
static bool mball_undosys_poll(bContext *C)
{
return editmball_object_from_context(C) != NULL;
}
static bool mball_undosys_step_encode(struct bContext *C, UndoStep *us_p)
{
MBallUndoStep *us = (MBallUndoStep *)us_p;
us->obedit_ref.ptr = editmball_object_from_context(C);
MetaBall *mb = us->obedit_ref.ptr->data;
editmball_from_undomball(&us->data, mb);
us->step.data_size = us->data.undo_size;
return true;
}
static void mball_undosys_step_decode(struct bContext *C, UndoStep *us_p, int UNUSED(dir))
{
ED_object_mode_set(C, OB_MODE_EDIT);
MBallUndoStep *us = (MBallUndoStep *)us_p;
Object *obedit = us->obedit_ref.ptr;
MetaBall *mb = obedit->data;
undomball_to_editmball(&us->data, mb);
DAG_id_tag_update(&obedit->id, OB_RECALC_DATA);
WM_event_add_notifier(C, NC_GEOM | ND_DATA, NULL);
}
static void mball_undosys_step_free(UndoStep *us_p)
{
MBallUndoStep *us = (MBallUndoStep *)us_p;
undomball_free_data(&us->data);
}
static void mball_undosys_foreach_ID_ref(
UndoStep *us_p, UndoTypeForEachIDRefFn foreach_ID_ref_fn, void *user_data)
{
MBallUndoStep *us = (MBallUndoStep *)us_p;
foreach_ID_ref_fn(user_data, ((UndoRefID *)&us->obedit_ref));
}
/* Export for ED_undo_sys. */
void ED_mball_undosys_type(UndoType *ut)
{
ut->name = "Edit MBall";
ut->poll = mball_undosys_poll;
ut->step_encode = mball_undosys_step_encode;
ut->step_decode = mball_undosys_step_decode;
ut->step_free = mball_undosys_step_free;
ut->step_foreach_ID_ref = mball_undosys_foreach_ID_ref;
ut->mode = BKE_UNDOTYPE_MODE_STORE;
ut->use_context = true;
ut->step_size = sizeof(MBallUndoStep);
}
/** \} */
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