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/*
* $Id$
*
* ***** 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): Campbell Barton
*
* ***** END GPL LICENSE BLOCK *****
*/
/** \file blender/python/intern/bpy_app_handlers.c
* \ingroup pythonintern
*/
#include <Python.h>
#include "BLI_utildefines.h"
#include "BLI_callbacks.h"
#include "RNA_types.h"
#include "RNA_access.h"
#include "bpy_rna.h"
#include "bpy_app_handlers.h"
void bpy_app_generic_callback(struct Main *main, struct ID *id, void *arg);
static PyTypeObject BlenderAppCbType;
static PyStructSequence_Field app_cb_info_fields[]= {
{(char *)"render_pre", NULL},
{(char *)"render_post", NULL},
{(char *)"render_stats", NULL},
{(char *)"load_pre", NULL},
{(char *)"load_post", NULL},
{(char *)"save_pre", NULL},
{(char *)"save_post", NULL},
{NULL}
};
static PyStructSequence_Desc app_cb_info_desc= {
(char *)"bpy.app.handlers", /* name */
(char *)"This module contains callbacks", /* doc */
app_cb_info_fields, /* fields */
(sizeof(app_cb_info_fields)/sizeof(PyStructSequence_Field)) - 1
};
/*
#if (BLI_CB_EVT_TOT != ((sizeof(app_cb_info_fields)/sizeof(PyStructSequence_Field))))
# error "Callbacks are out of sync"
#endif
*/
static PyObject *py_cb_array[BLI_CB_EVT_TOT]= {0};
static PyObject *make_app_cb_info(void)
{
PyObject *app_cb_info;
int pos= 0;
app_cb_info= PyStructSequence_New(&BlenderAppCbType);
if (app_cb_info == NULL) {
return NULL;
}
for(pos= 0; pos < BLI_CB_EVT_TOT; pos++) {
if(app_cb_info_fields[pos].name == NULL) {
Py_FatalError("invalid callback slots 1");
}
PyStructSequence_SET_ITEM(app_cb_info, pos, (py_cb_array[pos]= PyList_New(0)));
}
if(app_cb_info_fields[pos].name != NULL) {
Py_FatalError("invalid callback slots 2");
}
return app_cb_info;
}
PyObject *BPY_app_handlers_struct(void)
{
PyObject *ret;
PyStructSequence_InitType(&BlenderAppCbType, &app_cb_info_desc);
ret= make_app_cb_info();
/* prevent user from creating new instances */
BlenderAppCbType.tp_init= NULL;
BlenderAppCbType.tp_new= NULL;
/* assign the C callbacks */
if(ret) {
static bCallbackFuncStore funcstore_array[BLI_CB_EVT_TOT]= {{0}};
bCallbackFuncStore *funcstore;
int pos= 0;
for(pos= 0; pos < BLI_CB_EVT_TOT; pos++) {
funcstore= &funcstore_array[pos];
funcstore->func= bpy_app_generic_callback;
funcstore->alloc= 0;
funcstore->arg= SET_INT_IN_POINTER(pos);
BLI_add_cb(funcstore, pos);
}
}
return ret;
}
void BPY_app_handlers_reset(void)
{
int pos= 0;
for(pos= 0; pos < BLI_CB_EVT_TOT; pos++) {
PyList_SetSlice(py_cb_array[pos], 0, PY_SSIZE_T_MAX, NULL);
}
}
/* the actual callback - not necessarily called from py */
void bpy_app_generic_callback(struct Main *UNUSED(main), struct ID *id, void *arg)
{
PyObject *cb_list= py_cb_array[GET_INT_FROM_POINTER(arg)];
Py_ssize_t cb_list_len;
if((cb_list_len= PyList_GET_SIZE(cb_list)) > 0) {
PyGILState_STATE gilstate= PyGILState_Ensure();
PyObject* args= PyTuple_New(1); // save python creating each call
PyObject* func;
PyObject* ret;
Py_ssize_t pos;
/* setup arguments */
if(id) {
PointerRNA id_ptr;
RNA_id_pointer_create(id, &id_ptr);
PyTuple_SET_ITEM(args, 0, pyrna_struct_CreatePyObject(&id_ptr));
}
else {
PyTuple_SET_ITEM(args, 0, Py_None);
Py_INCREF(Py_None);
}
// Iterate the list and run the callbacks
for (pos=0; pos < cb_list_len; pos++) {
func= PyList_GET_ITEM(cb_list, pos);
ret= PyObject_Call(func, args, NULL);
if (ret==NULL) {
PyErr_Print();
PyErr_Clear();
}
else {
Py_DECREF(ret);
}
}
Py_DECREF(args);
PyGILState_Release(gilstate);
}
}
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