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blender-archive/source/blender/python/BPY_interface.c
Campbell Barton 6142ae3785 ==Python API== 
Bugfix, Space Handlers could crash blender when used with armatures.
also fixed some possible bugs in other areas.
2007-11-06 13:44:26 +00:00

2664 lines
70 KiB
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/*
* $Id$
*
* ***** BEGIN GPL/BL DUAL 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. The Blender
* Foundation also sells licenses for use in proprietary software under
* the Blender License. See http://www.blender.org/BL/ for information
* about this.
*
* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
* All rights reserved.
*
* This is a new part of Blender.
*
* Contributor(s): Michel Selten, Willian P. Germano, Stephen Swaney,
* Chris Keith, Chris Want, Ken Hughes
*
* ***** END GPL/BL DUAL LICENSE BLOCK *****
*/
#include <Python.h>
#include "compile.h" /* for the PyCodeObject */
#include "eval.h" /* for PyEval_EvalCode */
#include "BLI_blenlib.h" /* for BLI_last_slash() */
#include "BIF_interface.h" /* for pupmenu() */
#include "BIF_space.h"
#include "BIF_screen.h"
#include "BIF_toolbox.h"
#include "BKE_action.h" /* for get_pose_channel() */
#include "BKE_library.h"
#include "BKE_object.h" /* during_scriptlink() */
#include "BKE_text.h"
#include "BKE_constraint.h" /* for bConstraintOb */
#include "BKE_idprop.h"
#include "DNA_curve_types.h" /* for struct IpoDriver */
#include "DNA_ID.h" /* ipo driver */
#include "DNA_object_types.h" /* ipo driver */
#include "DNA_constraint_types.h" /* for pyconstraint */
#include "DNA_screen_types.h"
#include "DNA_userdef_types.h" /* for U.pythondir */
#include "MEM_guardedalloc.h"
#include "BPY_extern.h"
#include "BPY_menus.h"
#include "BPI_script.h"
#include "BKE_global.h"
#include "BKE_main.h"
#include "BKE_armature.h"
#include "api2_2x/EXPP_interface.h"
#include "api2_2x/constant.h"
#include "api2_2x/gen_utils.h"
#include "api2_2x/gen_library.h" /* GetPyObjectFromID */
#include "api2_2x/BGL.h"
#include "api2_2x/Blender.h"
#include "api2_2x/Camera.h"
#include "api2_2x/Draw.h"
#include "api2_2x/Object.h"
#include "api2_2x/Registry.h"
#include "api2_2x/Pose.h"
#include "api2_2x/bpy.h" /* for the new "bpy" module */
/*these next two are for pyconstraints*/
#include "api2_2x/IDProp.h"
#include "api2_2x/matrix.h"
/* for scriptlinks */
#include "DNA_lamp_types.h"
#include "DNA_camera_types.h"
#include "DNA_world_types.h"
#include "DNA_scene_types.h"
#include "DNA_material_types.h"
/* bpy_registryDict is declared in api2_2x/Registry.h and defined
* in api2_2x/Registry.c
* This Python dictionary will be used to store data that scripts
* choose to preserve after they are executed, so user changes can be
* restored next time the script is used. Check the Blender.Registry module.
*/
/*#include "api2_2x/Registry.h" */
/* for pydrivers (ipo drivers defined by one-line Python expressions) */
PyObject *bpy_pydriver_Dict = NULL;
/*
* set up a weakref list for Armatures
* creates list in __main__ module dict
*/
int setup_armature_weakrefs()
{
PyObject *maindict;
PyObject *main_module;
char *list_name = ARM_WEAKREF_LIST_NAME;
main_module = PyImport_AddModule( "__main__");
if(main_module){
PyObject *weakreflink;
maindict= PyModule_GetDict(main_module);
/* check if there is already a dict entry for the armature weakrefs,
* and delete if so before making another one */
weakreflink= PyDict_GetItemString(maindict,list_name);
if( weakreflink != NULL ) {
PyDict_DelItemString(maindict,list_name);
Py_XDECREF( weakreflink );
}
if (PyDict_SetItemString(maindict,
list_name,
PyList_New(0)) == -1){
printf("Oops - setup_armature_weakrefs()\n");
return 0;
}
}
return 1;
}
/* Declares the modules and their initialization functions
* These are TOP-LEVEL modules e.g. import `module` - there is no
* support for packages here e.g. import `package.module` */
static struct _inittab BPy_Inittab_Modules[] = {
{"Blender", M_Blender_Init},
{"bpy", m_bpy_init},
{NULL, NULL}
};
/*************************************************************************
* Structure definitions
**************************************************************************/
#define FILENAME_LENGTH 24
typedef struct _ScriptError {
char filename[FILENAME_LENGTH];
int lineno;
} ScriptError;
/****************************************************************************
* Global variables
****************************************************************************/
ScriptError g_script_error;
/***************************************************************************
* Function prototypes
***************************************************************************/
PyObject *RunPython( Text * text, PyObject * globaldict );
char *GetName( Text * text );
PyObject *CreateGlobalDictionary( void );
void ReleaseGlobalDictionary( PyObject * dict );
void DoAllScriptsFromList( ListBase * list, short event );
PyObject *importText( char *name );
void init_ourImport( void );
void init_ourReload( void );
PyObject *blender_import( PyObject * self, PyObject * args );
PyObject *RunPython2( Text * text, PyObject * globaldict, PyObject *localdict );
void BPY_Err_Handle( char *script_name );
PyObject *traceback_getFilename( PyObject * tb );
/****************************************************************************
* Description: This function will start the interpreter and load all modules
* as well as search for a python installation.
****************************************************************************/
void BPY_start_python( int argc, char **argv )
{
static int argc_copy = 0;
static char **argv_copy = NULL;
int first_time = argc;
/* we keep a copy of the values of argc and argv so that the game engine
* can call BPY_start_python(0, NULL) whenever a game ends, without having
* to know argc and argv there (in source/blender/src/space.c) */
if( first_time ) {
argc_copy = argc;
argv_copy = argv;
}
//stuff for Registry module
bpy_registryDict = PyDict_New( );/* check comment at start of this file */
if( !bpy_registryDict )
printf( "Error: Couldn't create the Registry Python Dictionary!" );
Py_SetProgramName( "blender" );
/* Py_Initialize() will attempt to import the site module and
* print an error if not found. See init_syspath() for the
* rest of our init msgs.
*/
/* print Python version
* Py_GetVersion() returns a ptr to a static string "9.9.9 (aaaa..."
*/
{
int count = 3; /* a nice default for major.minor. example 2.5 */
const char *version = Py_GetVersion();
/* we know a blank is there somewhere! */
char *blank_ptr = strchr( version, ' ');
if(blank_ptr)
count = blank_ptr - version;
printf( "Compiled with Python version %.*s.\n", count, version );
}
//Initialize the TOP-LEVEL modules
PyImport_ExtendInittab(BPy_Inittab_Modules);
//Start the interpreter
Py_Initialize( );
PySys_SetArgv( argc_copy, argv_copy );
//Overrides __import__
init_ourImport( );
init_ourReload( );
//init a global dictionary
g_blenderdict = NULL;
//Look for a python installation
init_syspath( first_time ); /* not first_time: some msgs are suppressed */
return;
}
/*****************************************************************************/
/* Description: This function will terminate the Python interpreter */
/*****************************************************************************/
void BPY_end_python( void )
{
Script *script = NULL;
if( bpy_registryDict ) {
Py_DECREF( bpy_registryDict );
bpy_registryDict = NULL;
}
if( bpy_pydriver_Dict ) {
Py_DECREF( bpy_pydriver_Dict );
bpy_pydriver_Dict = NULL;
}
/* Freeing all scripts here prevents problems with the order in which
* Python is finalized and G.main is freed in exit_usiblender() */
for (script = G.main->script.first; script; script = script->id.next) {
BPY_clear_script(script);
free_libblock( &G.main->script, script );
}
Py_Finalize( );
BPyMenu_RemoveAllEntries( ); /* freeing bpymenu mem */
/* a script might've opened a .blend file but didn't close it, so: */
EXPP_Library_Close( );
return;
}
void syspath_append( char *dirname )
{
PyObject *mod_sys= NULL, *dict= NULL, *path= NULL, *dir= NULL;
short ok=1;
PyErr_Clear( );
dir = Py_BuildValue( "s", dirname );
mod_sys = PyImport_ImportModule( "sys" ); /* new ref */
if (mod_sys) {
dict = PyModule_GetDict( mod_sys ); /* borrowed ref */
path = PyDict_GetItemString( dict, "path" ); /* borrowed ref */
if ( !PyList_Check( path ) ) {
ok = 0;
}
} else {
/* cant get the sys module */
ok = 0;
}
if (ok && PyList_Append( path, dir ) != 0)
ok = 0; /* append failed */
if( (ok==0) || PyErr_Occurred( ) )
Py_FatalError( "could import or build sys.path, can't continue" );
Py_XDECREF( mod_sys );
}
void init_syspath( int first_time )
{
PyObject *path;
PyObject *mod, *d;
char *progname;
char execdir[FILE_MAXDIR]; /*defines from DNA_space_types.h */
int n;
path = Py_BuildValue( "s", bprogname );
mod = PyImport_ImportModule( "Blender.sys" );
if( mod ) {
d = PyModule_GetDict( mod );
EXPP_dict_set_item_str( d, "progname", path );
Py_DECREF( mod );
} else
printf( "Warning: could not set Blender.sys.progname\n" );
progname = BLI_last_slash( bprogname ); /* looks for the last dir separator */
n = progname - bprogname;
if( n > 0 ) {
strncpy( execdir, bprogname, n );
if( execdir[n - 1] == '.' )
n--; /*fix for when run as ./blender */
execdir[n] = '\0';
syspath_append( execdir ); /* append to module search path */
} else
printf( "Warning: could not determine argv[0] path\n" );
/*
attempt to import 'site' module as a check for valid
python install found.
*/
printf("Checking for installed Python... "); /* appears after msg "Compiled with Python 2.x" */
mod = PyImport_ImportModule( "site" ); /* new ref */
if( mod ) {
printf("got it!\n");
Py_DECREF( mod );
} else { /* import 'site' failed */
PyErr_Clear( );
if( first_time ) {
printf( "No installed Python found.\n" );
printf( "Only built-in modules are available. Some scripts may not run.\n" );
printf( "Continuing happily.\n" );
}
}
/*
* initialize the sys module
* set sys.executable to the Blender exe
*/
mod = PyImport_ImportModule( "sys" ); /* new ref */
if( mod ) {
d = PyModule_GetDict( mod ); /* borrowed ref */
EXPP_dict_set_item_str( d, "executable",
Py_BuildValue( "s", bprogname ) );
Py_DECREF( mod );
} else{
printf("import of sys module failed\n");
}
}
/****************************************************************************
* Description: This function finishes Python initialization in Blender.
Because U.pythondir (user defined dir for scripts) isn't
initialized when BPY_start_Python needs to be executed, we
postpone adding U.pythondir to sys.path and also BPyMenus
(mechanism to register scripts in Blender menus) for when
that dir info is available.
****************************************************************************/
void BPY_post_start_python( void )
{
char dirpath[FILE_MAX];
char *sdir = NULL;
if(U.pythondir[0] != '\0' ) {
char modpath[FILE_MAX];
int upyslen = strlen(U.pythondir);
/* check if user pydir ends with a slash and, if so, remove the slash
* (for eventual implementations of c library's stat function that might
* not like it) */
if (upyslen > 2) { /* avoids doing anything if dir == '//' */
char ending = U.pythondir[upyslen - 1];
if (ending == '/' || ending == '\\')
U.pythondir[upyslen - 1] = '\0';
}
BLI_strncpy(dirpath, U.pythondir, FILE_MAX);
BLI_convertstringcode(dirpath, G.sce, 0);
syspath_append(dirpath); /* append to module search path */
BLI_make_file_string("/", modpath, dirpath, "bpymodules");
if (BLI_exists(modpath)) syspath_append(modpath);
}
sdir = bpy_gethome(1);
if (sdir) {
syspath_append(sdir);
BLI_make_file_string("/", dirpath, sdir, "bpymodules");
if (BLI_exists(dirpath)) syspath_append(dirpath);
}
BPyMenu_Init( 0 ); /* get dynamic menus (registered scripts) data */
return;
}
/****************************************************************************
* Description: This function will return the linenumber on which an error
* has occurred in the Python script.
****************************************************************************/
int BPY_Err_getLinenumber( void )
{
return g_script_error.lineno;
}
/*****************************************************************************/
/* Description: This function will return the filename of the python script. */
/*****************************************************************************/
const char *BPY_Err_getFilename( void )
{
return g_script_error.filename;
}
/*****************************************************************************/
/* Description: Return PyString filename from a traceback object */
/*****************************************************************************/
PyObject *traceback_getFilename( PyObject * tb )
{
PyObject *v = NULL;
/* co_filename is in f_code, which is in tb_frame, which is in tb */
v = PyObject_GetAttrString( tb, "tb_frame" );
if (v) {
Py_DECREF( v );
v = PyObject_GetAttrString( v, "f_code" );
if (v) {
Py_DECREF( v );
v = PyObject_GetAttrString( v, "co_filename" );
}
}
if (v) return v;
else return PyString_FromString("unknown");
}
/****************************************************************************
* Description: Blender Python error handler. This catches the error and
* stores filename and line number in a global
*****************************************************************************/
void BPY_Err_Handle( char *script_name )
{
PyObject *exception, *err, *tb, *v;
if( !script_name ) {
printf( "Error: script has NULL name\n" );
return;
}
PyErr_Fetch( &exception, &err, &tb );
if (!script_name) script_name = "untitled";
//if( !exception && !tb ) {
// printf( "FATAL: spurious exception\n" );
// return;
//}
strcpy( g_script_error.filename, script_name );
if( exception
&& PyErr_GivenExceptionMatches( exception, PyExc_SyntaxError ) ) {
/* no traceback available when SyntaxError */
PyErr_Restore( exception, err, tb ); /* takes away reference! */
PyErr_Print( );
v = PyObject_GetAttrString( err, "lineno" );
if( v ) {
g_script_error.lineno = PyInt_AsLong( v );
Py_DECREF( v );
} else {
g_script_error.lineno = -1;
}
/* this avoids an abort in Python 2.3's garbage collecting: */
PyErr_Clear( );
return;
} else {
PyErr_NormalizeException( &exception, &err, &tb );
PyErr_Restore( exception, err, tb ); /* takes away reference! */
PyErr_Print( );
tb = PySys_GetObject( "last_traceback" );
if( !tb ) {
printf( "\nCan't get traceback\n" );
return;
}
Py_INCREF( tb );
/* From old bpython BPY_main.c:
* 'check traceback objects and look for last traceback in the
* same text file. This is used to jump to the line of where the
* error occured. "If the error occured in another text file or module,
* the last frame in the current file is adressed."'
*/
for(;;) {
v = PyObject_GetAttrString( tb, "tb_next" );
if( !v || v == Py_None ||
strcmp(PyString_AsString(traceback_getFilename(v)), script_name)) {
break;
}
Py_DECREF( tb );
tb = v;
}
v = PyObject_GetAttrString( tb, "tb_lineno" );
if (v) {
g_script_error.lineno = PyInt_AsLong(v);
Py_DECREF(v);
}
v = traceback_getFilename( tb );
if (v) {
strncpy( g_script_error.filename, PyString_AsString( v ),
FILENAME_LENGTH );
Py_DECREF(v);
}
Py_DECREF( tb );
}
return;
}
/****************************************************************************
* Description: This function executes the script passed by st.
* Notes: It is called by blender/src/drawtext.c when a Blender user
* presses ALT+PKEY in the script's text window.
*****************************************************************************/
int BPY_txt_do_python_Text( struct Text *text )
{
PyObject *py_dict, *py_result;
BPy_constant *info;
char textname[24];
Script *script = G.main->script.first;
if( !text )
return 0;
/* check if this text is already running */
while( script ) {
if( !strcmp( script->id.name + 2, text->id.name + 2 ) ) {
/* if this text is already a running script,
* just move to it: */
SpaceScript *sc;
newspace( curarea, SPACE_SCRIPT );
sc = curarea->spacedata.first;
sc->script = script;
return 1;
}
script = script->id.next;
}
/* Create a new script structure and initialize it: */
script = alloc_libblock( &G.main->script, ID_SCRIPT, GetName( text ) );
if( !script ) {
printf( "couldn't allocate memory for Script struct!" );
return 0;
}
/* if in the script Blender.Load(blendfile) is not the last command,
* an error after it will call BPY_Err_Handle below, but the text struct
* will have been deallocated already, so we need to copy its name here.
*/
BLI_strncpy( textname, GetName( text ),
strlen( GetName( text ) ) + 1 );
script->id.us = 1;
script->flags = SCRIPT_RUNNING;
script->py_draw = NULL;
script->py_event = NULL;
script->py_button = NULL;
script->py_browsercallback = NULL;
py_dict = CreateGlobalDictionary( );
if( !setup_armature_weakrefs()){
printf("Oops - weakref dict\n");
return 0;
}
script->py_globaldict = py_dict;
info = ( BPy_constant * ) PyConstant_New( );
if( info ) {
PyConstant_Insert( info, "name",
PyString_FromString( script->id.name + 2 ) );
Py_INCREF( Py_None );
PyConstant_Insert( info, "arg", Py_None );
EXPP_dict_set_item_str( py_dict, "__script__",
( PyObject * ) info );
}
py_result = RunPython( text, py_dict ); /* Run the script */
if( !py_result ) { /* Failed execution of the script */
BPY_Err_Handle( textname );
ReleaseGlobalDictionary( py_dict );
script->py_globaldict = NULL;
if( G.main->script.first )
free_libblock( &G.main->script, script );
return 0;
} else {
Py_DECREF( py_result );
script->flags &= ~SCRIPT_RUNNING;
if( !script->flags ) {
ReleaseGlobalDictionary( py_dict );
script->py_globaldict = NULL;
free_libblock( &G.main->script, script );
}
}
return 1; /* normal return */
}
/****************************************************************************
* Description: Called from command line to run a Python script
* automatically. The script can be a file or a Blender Text in the current
* .blend.
****************************************************************************/
void BPY_run_python_script( char *fn )
{
Text *text = NULL;
int is_blender_text = 0;
if (!BLI_exists(fn)) { /* if there's no such filename ... */
text = G.main->text.first; /* try an already existing Blender Text */
while (text) {
if (!strcmp(fn, text->id.name + 2)) break;
text = text->id.next;
}
if (text == NULL) {
printf("\nError: no such file or Blender text -- %s.\n", fn);
return;
}
else is_blender_text = 1; /* fn is already a Blender Text */
}
else {
text = add_text(fn);
if (text == NULL) {
printf("\nError in BPY_run_python_script:\n"
"couldn't create Blender text from %s\n", fn);
/* Chris: On Windows if I continue I just get a segmentation
* violation. To get a baseline file I exit here. */
exit(2);
/* return; */
}
}
if (BPY_txt_do_python_Text(text) != 1) {
printf("\nError executing Python script from command-line:\n"
"%s (at line %d).\n", fn, BPY_Err_getLinenumber());
}
if (!is_blender_text) {
/* We can't simply free the text, since the script might have called
* Blender.Load() to load a new .blend, freeing previous data.
* So we check if the pointer is still valid. */
Text *txtptr = G.main->text.first;
while (txtptr) {
if (txtptr == text) {
free_libblock(&G.main->text, text);
break;
}
txtptr = txtptr->id.next;
}
}
}
/****************************************************************************
* Description: This function executes the script chosen from a menu.
* Notes: It is called by the ui code in src/header_???.c when a user
* clicks on a menu entry that refers to a script.
* Scripts are searched in the BPyMenuTable, using the given
* menutype and event values to know which one was chosen.
*****************************************************************************/
int BPY_menu_do_python( short menutype, int event )
{
PyObject *py_dict, *py_res, *pyarg = NULL;
BPy_constant *info;
BPyMenu *pym;
BPySubMenu *pysm;
FILE *fp = NULL;
char *buffer, *s;
char filestr[FILE_MAXDIR + FILE_MAXFILE];
char scriptname[21];
Script *script = NULL;
int len;
pym = BPyMenu_GetEntry( menutype, ( short ) event );
if( !pym )
return 0;
if( pym->version > G.version )
notice( "Version mismatch: script was written for Blender %d. "
"It may fail with yours: %d.", pym->version,
G.version );
/* if there are submenus, let the user choose one from a pupmenu that we
* create here.*/
pysm = pym->submenus;
if( pysm ) {
char *pupstr;
int arg;
pupstr = BPyMenu_CreatePupmenuStr( pym, menutype );
if( pupstr ) {
arg = pupmenu( pupstr );
MEM_freeN( pupstr );
if( arg >= 0 ) {
while( arg-- )
pysm = pysm->next;
pyarg = PyString_FromString( pysm->arg );
} else
return 0;
}
}
if( !pyarg ) { /* no submenus */
Py_INCREF( Py_None );
pyarg = Py_None;
}
if( pym->dir ) { /* script is in U.pythondir */
char upythondir[FILE_MAXDIR];
/* dirs in Blender can be "//", which has a special meaning */
BLI_strncpy(upythondir, U.pythondir, FILE_MAXDIR);
BLI_convertstringcode(upythondir, G.sce, 0); /* if so, this expands it */
BLI_make_file_string( "/", filestr, upythondir, pym->filename );
}
else { /* script is in default scripts dir */
char *scriptsdir = bpy_gethome(1);
if (!scriptsdir) {
printf("Error loading script: can't find default scripts dir!");
return 0;
}
BLI_make_file_string( "/", filestr, scriptsdir, pym->filename );
}
fp = fopen( filestr, "rb" );
if( !fp ) {
printf( "Error loading script: couldn't open file %s\n",
filestr );
return 0;
}
BLI_strncpy(scriptname, pym->name, 21);
len = strlen(scriptname) - 1;
/* by convention, scripts that open the file browser or have submenus
* display '...'. Here we remove them from the datablock name */
while ((len > 0) && scriptname[len] == '.') {
scriptname[len] = '\0';
len--;
}
/* Create a new script structure and initialize it: */
script = alloc_libblock( &G.main->script, ID_SCRIPT, scriptname );
if( !script ) {
printf( "couldn't allocate memory for Script struct!" );
fclose( fp );
return 0;
}
/* let's find a proper area for an eventual script gui:
* (still experimenting here, need definition on which win
* each group will be put to code this properly) */
switch ( menutype ) {
case PYMENU_IMPORT: /* first 4 were handled in header_info.c */
case PYMENU_EXPORT:
case PYMENU_HELP:
case PYMENU_RENDER:
case PYMENU_WIZARDS:
case PYMENU_SCRIPTTEMPLATE:
case PYMENU_MESHFACEKEY:
break;
default:
if( curarea->spacetype != SPACE_SCRIPT ) {
ScrArea *sa = NULL;
sa = find_biggest_area_of_type( SPACE_BUTS );
if( sa ) {
if( ( 1.5 * sa->winx ) < sa->winy )
sa = NULL; /* too narrow? */
}
if( !sa )
sa = find_biggest_area_of_type( SPACE_SCRIPT );
if( !sa )
sa = find_biggest_area_of_type( SPACE_TEXT );
if( !sa )
sa = find_biggest_area_of_type( SPACE_IMAGE ); /* group UV */
if( !sa )
sa = find_biggest_area_of_type( SPACE_VIEW3D );
if( !sa )
sa = find_biggest_area( );
areawinset( sa->win );
}
break;
}
script->id.us = 1;
script->flags = SCRIPT_RUNNING;
script->py_draw = NULL;
script->py_event = NULL;
script->py_button = NULL;
script->py_browsercallback = NULL;
py_dict = CreateGlobalDictionary( );
script->py_globaldict = py_dict;
info = ( BPy_constant * ) PyConstant_New( );
if( info ) {
PyConstant_Insert( info, "name",
PyString_FromString( script->id.name + 2 ) );
PyConstant_Insert( info, "arg", pyarg );
EXPP_dict_set_item_str( py_dict, "__script__",
( PyObject * ) info );
}
/* Previously we used PyRun_File to run directly the code on a FILE
* object, but as written in the Python/C API Ref Manual, chapter 2,
* 'FILE structs for different C libraries can be different and
* incompatible'.
* So now we load the script file data to a buffer */
fseek( fp, 0L, SEEK_END );
len = ftell( fp );
fseek( fp, 0L, SEEK_SET );
buffer = MEM_mallocN( len + 2, "pyfilebuf" ); /* len+2 to add '\n\0' */
len = fread( buffer, 1, len, fp );
buffer[len] = '\n'; /* fix syntax error in files w/o eol */
buffer[len + 1] = '\0';
/* fast clean-up of dos cr/lf line endings: change '\r' to space */
/* we also have to check for line splitters: '\\' */
/* to avoid possible syntax errors on dos files on win */
/**/
/* but first make sure we won't disturb memory below &buffer[0]: */
if( *buffer == '\r' )
*buffer = ' ';
/* now handle the whole buffer */
for( s = buffer + 1; *s != '\0'; s++ ) {
if( *s == '\r' ) {
if( *( s - 1 ) == '\\' ) { /* special case: long lines split with '\': */
*( s - 1 ) = ' '; /* we write ' \', because '\ ' is a syntax error */
*s = '\\';
} else
*s = ' '; /* not a split line, just replace '\r' with ' ' */
}
}
fclose( fp );
if( !setup_armature_weakrefs()){
printf("Oops - weakref dict\n");
MEM_freeN( buffer );
return 0;
}
/* run the string buffer */
py_res = PyRun_String( buffer, Py_file_input, py_dict, py_dict );
MEM_freeN( buffer );
if( !py_res ) { /* Failed execution of the script */
BPY_Err_Handle( script->id.name + 2 );
ReleaseGlobalDictionary( py_dict );
script->py_globaldict = NULL;
if( G.main->script.first )
free_libblock( &G.main->script, script );
error( "Python script error: check console" );
return 0;
} else {
Py_DECREF( py_res );
script->flags &= ~SCRIPT_RUNNING;
if( !script->flags ) {
ReleaseGlobalDictionary( py_dict );
script->py_globaldict = NULL;
free_libblock( &G.main->script, script );
/* special case: called from the menu in the Scripts window
* we have to change sc->script pointer, since it'll be freed here.*/
if( curarea->spacetype == SPACE_SCRIPT ) {
SpaceScript *sc = curarea->spacedata.first;
sc->script = G.main->script.first; /* can be null, which is ok ... */
/* ... meaning no other script is running right now. */
}
}
}
return 1; /* normal return */
}
/*****************************************************************************
* Description:
* Notes:
*****************************************************************************/
void BPY_free_compiled_text( struct Text *text )
{
if( !text->compiled )
return;
Py_DECREF( ( PyObject * ) text->compiled );
text->compiled = NULL;
return;
}
/*****************************************************************************
* Description: This function frees a finished (flags == 0) script.
*****************************************************************************/
void BPY_free_finished_script( Script * script )
{
if( !script )
return;
if( PyErr_Occurred( ) ) { /* if script ended after filesel */
PyErr_Print( ); /* eventual errors are handled now */
error( "Python script error: check console" );
}
free_libblock( &G.main->script, script );
return;
}
static void unlink_script( Script * script )
{ /* copied from unlink_text in drawtext.c */
bScreen *scr;
ScrArea *area;
SpaceLink *sl;
for( scr = G.main->screen.first; scr; scr = scr->id.next ) {
for( area = scr->areabase.first; area; area = area->next ) {
for( sl = area->spacedata.first; sl; sl = sl->next ) {
if( sl->spacetype == SPACE_SCRIPT ) {
SpaceScript *sc = ( SpaceScript * ) sl;
if( sc->script == script ) {
sc->script = NULL;
if( sc ==
area->spacedata.first ) {
scrarea_queue_redraw
( area );
}
}
}
}
}
}
}
void BPY_clear_script( Script * script )
{
PyObject *dict;
if( !script )
return;
if (!Py_IsInitialized()) {
printf("\nError: trying to free script data after finalizing Python!");
printf("\nScript name: %s\n", script->id.name+2);
return;
}
Py_XDECREF( ( PyObject * ) script->py_draw );
Py_XDECREF( ( PyObject * ) script->py_event );
Py_XDECREF( ( PyObject * ) script->py_button );
Py_XDECREF( ( PyObject * ) script->py_browsercallback );
script->py_draw = NULL;
script->py_event = NULL;
script->py_button = NULL;
script->py_browsercallback = NULL;
dict = script->py_globaldict;
if( dict ) {
PyDict_Clear( dict );
Py_DECREF( dict ); /* Release dictionary. */
script->py_globaldict = NULL;
}
unlink_script( script );
}
/* PyDrivers */
/* PyDrivers are Ipo Drivers governed by expressions written in Python.
* Expressions here are one-liners that evaluate to a float value. */
/* For faster execution we keep a special dictionary for pydrivers, with
* the needed modules and aliases. */
static int bpy_pydriver_create_dict(void)
{
PyObject *d, *mod;
if (bpy_pydriver_Dict) return -1;
d = PyDict_New();
if (!d) return -1;
bpy_pydriver_Dict = d;
/* import some modules: builtins, Blender, math, Blender.noise */
PyDict_SetItemString(d, "__builtins__", PyEval_GetBuiltins());
mod = PyImport_ImportModule("Blender");
if (mod) {
PyDict_SetItemString(d, "Blender", mod);
PyDict_SetItemString(d, "b", mod);
Py_DECREF(mod);
}
mod = PyImport_ImportModule("math");
if (mod) {
PyDict_SetItemString(d, "math", mod);
PyDict_SetItemString(d, "m", mod);
Py_DECREF(mod);
}
mod = PyImport_ImportModule("Blender.Noise");
if (mod) {
PyDict_SetItemString(d, "noise", mod);
PyDict_SetItemString(d, "n", mod);
Py_DECREF(mod);
}
/* If there's a Blender text called pydrivers.py, import it.
* Users can add their own functions to this module. */
mod = importText("pydrivers"); /* can also use PyImport_Import() */
if (mod) {
PyDict_SetItemString(d, "pydrivers", mod);
PyDict_SetItemString(d, "p", mod);
Py_DECREF(mod);
}
else
PyErr_Clear();
/* short aliases for some Get() functions: */
/* ob(obname) == Blender.Object.Get(obname) */
mod = PyImport_ImportModule("Blender.Object");
if (mod) {
PyObject *fcn = PyObject_GetAttrString(mod, "Get");
Py_DECREF(mod);
if (fcn) {
PyDict_SetItemString(d, "ob", fcn);
Py_DECREF(fcn);
}
}
/* me(meshname) == Blender.Mesh.Get(meshname) */
mod = PyImport_ImportModule("Blender.Mesh");
if (mod) {
PyObject *fcn = PyObject_GetAttrString(mod, "Get");
Py_DECREF(mod);
if (fcn) {
PyDict_SetItemString(d, "me", fcn);
Py_DECREF(fcn);
}
}
/* ma(matname) == Blender.Material.Get(matname) */
mod = PyImport_ImportModule("Blender.Material");
if (mod) {
PyObject *fcn = PyObject_GetAttrString(mod, "Get");
Py_DECREF(mod);
if (fcn) {
PyDict_SetItemString(d, "ma", fcn);
Py_DECREF(fcn);
}
}
return 0;
}
/* error return function for BPY_eval_pydriver */
static float pydriver_error(IpoDriver *driver) {
if (bpy_pydriver_oblist)
bpy_pydriver_freeList();
if (bpy_pydriver_Dict) { /* free the global dict used by pydrivers */
PyDict_Clear(bpy_pydriver_Dict);
Py_DECREF(bpy_pydriver_Dict);
bpy_pydriver_Dict = NULL;
}
driver->flag |= IPO_DRIVER_FLAG_INVALID; /* py expression failed */
if (driver->ob)
fprintf(stderr, "\nError in Ipo Driver: Object %s\nThis is the failed Python expression:\n'%s'\n\n", driver->ob->id.name+2, driver->name);
else
fprintf(stderr, "\nError in Ipo Driver: No Object\nThis is the failed Python expression:\n'%s'\n\n", driver->name);
PyErr_Print();
return 0.0f;
}
/********PyConstraints*********/
/* This function checks whether a text-buffer is a PyConstraint candidate.
* It uses simple text parsing that could be easily confused!
*/
int BPY_is_pyconstraint(Text *text)
{
TextLine *tline = text->lines.first;
if (tline && (tline->len > 10)) {
char *line = tline->line;
/* Expected format: #BPYCONSTRAINT
* The actual checks are forgiving, so slight variations also work. */
if (line && line[0] == '#' && strstr(line, "BPYCONSTRAINT")) return 1;
}
return 0;
}
/* This function is called to update PyConstraint data so that it is compatible with the script.
* Some of the allocating/freeing of memory for constraint targets occurs here, espcially
* if the number of targets changes.
*/
void BPY_pyconstraint_update(Object *owner, bConstraint *con)
{
bPythonConstraint *data= con->data;
if (data->text) {
/* script does exist. it is assumed that this is a valid pyconstraint script */
PyObject *globals;
PyObject *retval, *gval;
int num, i;
/* clear the relevant flags first */
data->flag = 0;
/* populate globals dictionary */
globals = CreateGlobalDictionary();
retval = RunPython(data->text, globals);
if (retval == NULL) {
BPY_Err_Handle(data->text->id.name);
ReleaseGlobalDictionary(globals);
data->flag |= PYCON_SCRIPTERROR;
return;
}
Py_XDECREF(retval);
retval = NULL;
/* try to find NUM_TARGETS */
gval = PyDict_GetItemString(globals, "NUM_TARGETS");
if ( (gval) && (num= PyInt_AsLong(gval)) ) {
/* NUM_TARGETS is defined... and non-zero */
bConstraintTarget *ct;
/* check if it is valid (just make sure it is not negative)
* TODO: PyInt_AsLong may return -1 as sign of invalid input...
*/
num = abs(num);
data->flag |= PYCON_USETARGETS;
/* check if the number of targets has changed */
if (num < data->tarnum) {
/* free a few targets */
num= data->tarnum - num;
for (i = 0; i < num; i++, data->tarnum--) {
ct= data->targets.last;
BLI_freelinkN(&data->targets, ct);
}
}
else if (num > data->tarnum) {
/* add a few targets */
num = num - data->tarnum;
for (i = 0; i < num; i++, data->tarnum++) {
ct= MEM_callocN(sizeof(bConstraintTarget), "PyConTarget");
BLI_addtail(&data->targets, ct);
}
}
/* validate targets */
con->flag &= ~CONSTRAINT_DISABLE;
for (ct= data->targets.first; ct; ct= ct->next) {
if (!exist_object(ct->tar)) {
ct->tar = NULL;
con->flag |= CONSTRAINT_DISABLE;
break;
}
if ((ct->tar == owner) && (ct->subtarget[0] != 0)) {
if (get_named_bone(get_armature(owner), ct->subtarget) == NULL) {
con->flag |= CONSTRAINT_DISABLE;
break;
}
}
}
/* clear globals */
ReleaseGlobalDictionary(globals);
}
else {
/* NUM_TARGETS is not defined or equals 0 */
ReleaseGlobalDictionary(globals);
/* free all targets */
BLI_freelistN(&data->targets);
data->tarnum = 0;
data->flag &= ~PYCON_USETARGETS;
return;
}
}
else {
/* no script, so clear any settings/data now */
data->tarnum = 0;
data->flag = 0;
con->flag &= ~CONSTRAINT_DISABLE;
BLI_freelistN(&data->targets);
/* supposedly this should still leave the base struct... */
IDP_FreeProperty(data->prop);
}
}
/* PyConstraints Evaluation Function (only called from evaluate_constraint)
* This function is responsible for modifying the ownermat that it is passed.
*/
void BPY_pyconstraint_eval(bPythonConstraint *con, bConstraintOb *cob, ListBase *targets)
{
PyObject *srcmat, *tarmat, *tarmats, *idprop;
PyObject *globals;
PyObject *gval;
PyObject *pyargs, *retval;
bConstraintTarget *ct;
MatrixObject *retmat;
int row, col, index;
if (!con->text) return;
if (con->flag & PYCON_SCRIPTERROR) return;
globals = CreateGlobalDictionary();
/* wrap blender-data as PyObjects for evaluation
* - we expose the owner's matrix as pymatrix
* - id-properties are wrapped using the id-properties pyapi
* - targets are presented as a list of matrices
*/
srcmat = newMatrixObject((float *)cob->matrix, 4, 4, Py_NEW);
idprop = BPy_Wrap_IDProperty(NULL, con->prop, NULL);
tarmats= PyList_New(con->tarnum);
for (ct=targets->first, index=0; ct; ct=ct->next, index++) {
tarmat = newMatrixObject((float *)ct->matrix, 4, 4, Py_NEW);
PyList_SetItem(tarmats, index, tarmat);
}
/* since I can't remember what the armature weakrefs do, I'll just leave this here
commented out. This function was based on pydrivers, and it might still be relevent.
if( !setup_armature_weakrefs()){
fprintf( stderr, "Oops - weakref dict setup\n");
return result;
}
*/
retval = RunPython(con->text, globals);
if (retval == NULL) {
BPY_Err_Handle(con->text->id.name);
con->flag |= PYCON_SCRIPTERROR;
/* free temp objects */
Py_XDECREF(idprop);
Py_XDECREF(srcmat);
Py_XDECREF(tarmats);
ReleaseGlobalDictionary(globals);
return;
}
if (retval) {Py_XDECREF( retval );}
retval = NULL;
gval = PyDict_GetItemString(globals, "doConstraint");
if (!gval) {
printf("ERROR: no doConstraint function in constraint!\n");
/* free temp objects */
Py_XDECREF(idprop);
Py_XDECREF(srcmat);
Py_XDECREF(tarmats);
ReleaseGlobalDictionary(globals);
return;
}
/* Now for the fun part! Try and find the functions we need. */
if (PyFunction_Check(gval)) {
pyargs = Py_BuildValue("OOO", srcmat, tarmats, idprop);
retval = PyObject_CallObject(gval, pyargs);
Py_XDECREF(pyargs);
}
else {
printf("ERROR: doConstraint is supposed to be a function!\n");
con->flag |= PYCON_SCRIPTERROR;
Py_XDECREF(idprop);
Py_XDECREF(srcmat);
Py_XDECREF(tarmats);
ReleaseGlobalDictionary(globals);
return;
}
if (!retval) {
BPY_Err_Handle(con->text->id.name);
con->flag |= PYCON_SCRIPTERROR;
/* free temp objects */
Py_XDECREF(idprop);
Py_XDECREF(srcmat);
Py_XDECREF(tarmats);
ReleaseGlobalDictionary(globals);
return;
}
if (!PyObject_TypeCheck(retval, &matrix_Type)) {
printf("Error in PyConstraint - doConstraint: Function not returning a matrix!\n");
con->flag |= PYCON_SCRIPTERROR;
Py_XDECREF(idprop);
Py_XDECREF(srcmat);
Py_XDECREF(tarmats);
Py_XDECREF(retval);
ReleaseGlobalDictionary(globals);
return;
}
retmat = (MatrixObject *)retval;
if (retmat->rowSize != 4 || retmat->colSize != 4) {
printf("Error in PyConstraint - doConstraint: Matrix returned is the wrong size!\n");
con->flag |= PYCON_SCRIPTERROR;
Py_XDECREF(idprop);
Py_XDECREF(srcmat);
Py_XDECREF(tarmats);
Py_XDECREF(retval);
ReleaseGlobalDictionary(globals);
return;
}
/* this is the reverse of code taken from newMatrix() */
for(row = 0; row < 4; row++) {
for(col = 0; col < 4; col++) {
cob->matrix[row][col] = retmat->contigPtr[row*4+col];
}
}
/* free temp objects */
Py_XDECREF(idprop);
Py_XDECREF(srcmat);
Py_XDECREF(tarmats);
Py_XDECREF(retval);
/* clear globals */
ReleaseGlobalDictionary(globals);
}
/* This evaluates the target matrix for each target the PyConstraint uses.
* NOTE: it only does one target at a time!
*/
void BPY_pyconstraint_target(bPythonConstraint *con, bConstraintTarget *ct)
{
PyObject *tar, *subtar;
PyObject *tarmat, *idprop;
PyObject *globals;
PyObject *gval;
PyObject *pyargs, *retval;
MatrixObject *retmat;
int row, col;
if (!con->text) return;
if (con->flag & PYCON_SCRIPTERROR) return;
if (!ct) return;
globals = CreateGlobalDictionary();
tar = Object_CreatePyObject(ct->tar);
if ((ct->tar) && (ct->tar->type==OB_ARMATURE)) {
bPoseChannel *pchan;
pchan = get_pose_channel(ct->tar->pose, ct->subtarget);
subtar = PyPoseBone_FromPosechannel(pchan);
}
else
subtar = PyString_FromString(ct->subtarget);
tarmat = newMatrixObject((float *)ct->matrix, 4, 4, Py_NEW);
idprop = BPy_Wrap_IDProperty( NULL, con->prop, NULL);
/* since I can't remember what the armature weakrefs do, I'll just leave this here
commented out. This function was based on pydrivers, and it might still be relevent.
if( !setup_armature_weakrefs()){
fprintf( stderr, "Oops - weakref dict setup\n");
return result;
}
*/
retval = RunPython(con->text, globals);
if (retval == NULL) {
BPY_Err_Handle(con->text->id.name);
con->flag |= PYCON_SCRIPTERROR;
/* free temp objects */
Py_XDECREF(tar);
Py_XDECREF(subtar);
Py_XDECREF(idprop);
Py_XDECREF(tarmat);
ReleaseGlobalDictionary(globals);
return;
}
Py_XDECREF(retval);
retval = NULL;
/* try to find doTarget function to set the target matrix */
gval = PyDict_GetItemString(globals, "doTarget");
if (!gval) {
/* free temp objects */
Py_XDECREF(tar);
Py_XDECREF(subtar);
Py_XDECREF(idprop);
Py_XDECREF(tarmat);
ReleaseGlobalDictionary(globals);
return;
}
/* Now for the fun part! Try and find the functions we need.*/
if (PyFunction_Check(gval)) {
pyargs = Py_BuildValue("OOOO", tar, subtar, tarmat, idprop);
retval = PyObject_CallObject(gval, pyargs);
Py_XDECREF(pyargs);
}
else {
printf("ERROR: doTarget is supposed to be a function!\n");
con->flag |= PYCON_SCRIPTERROR;
Py_XDECREF(tar);
Py_XDECREF(subtar);
Py_XDECREF(idprop);
Py_XDECREF(tarmat);
ReleaseGlobalDictionary(globals);
return;
}
if (!retval) {
BPY_Err_Handle(con->text->id.name);
con->flag |= PYCON_SCRIPTERROR;
/* free temp objects */
Py_XDECREF(tar);
Py_XDECREF(subtar);
Py_XDECREF(idprop);
Py_XDECREF(tarmat);
ReleaseGlobalDictionary(globals);
return;
}
if (!PyObject_TypeCheck(retval, &matrix_Type)) {
con->flag |= PYCON_SCRIPTERROR;
Py_XDECREF(tar);
Py_XDECREF(subtar);
Py_XDECREF(idprop);
Py_XDECREF(tarmat);
Py_XDECREF(retval);
ReleaseGlobalDictionary(globals);
return;
}
retmat = (MatrixObject *)retval;
if (retmat->rowSize != 4 || retmat->colSize != 4) {
printf("Error in PyConstraint - doTarget: Matrix returned is the wrong size!\n");
con->flag |= PYCON_SCRIPTERROR;
Py_XDECREF(tar);
Py_XDECREF(subtar);
Py_XDECREF(idprop);
Py_XDECREF(tarmat);
Py_XDECREF(retval);
ReleaseGlobalDictionary(globals);
return;
}
/* this is the reverse of code taken from newMatrix() */
for(row = 0; row < 4; row++) {
for(col = 0; col < 4; col++) {
ct->matrix[row][col] = retmat->contigPtr[row*4+col];
}
}
/* free temp objects */
Py_XDECREF(tar);
Py_XDECREF(subtar);
Py_XDECREF(idprop);
Py_XDECREF(tarmat);
Py_XDECREF(retval);
/* clear globals */
ReleaseGlobalDictionary(globals);
}
/* This draws+handles the user-defined interface for editing pyconstraints idprops */
void BPY_pyconstraint_settings(void *arg1, void *arg2)
{
bPythonConstraint *con= (bPythonConstraint *)arg1;
PyObject *idprop;
PyObject *globals;
PyObject *gval;
PyObject *retval;
if (!con->text) return;
if (con->flag & PYCON_SCRIPTERROR) return;
globals = CreateGlobalDictionary();
idprop = BPy_Wrap_IDProperty( NULL, con->prop, NULL);
retval = RunPython(con->text, globals);
if (retval == NULL) {
BPY_Err_Handle(con->text->id.name);
ReleaseGlobalDictionary(globals);
con->flag |= PYCON_SCRIPTERROR;
/* free temp objects */
Py_XDECREF(idprop);
return;
}
if (retval) {Py_XDECREF( retval );}
retval = NULL;
gval = PyDict_GetItemString(globals, "getSettings");
if (!gval) {
printf("ERROR: no getSettings function in constraint!\n");
/* free temp objects */
ReleaseGlobalDictionary( globals );
Py_XDECREF(idprop);
return;
}
/* Now for the fun part! Try and find the functions we need. */
if (PyFunction_Check(gval)) {
retval = PyObject_CallFunction(gval, "O", idprop);
}
else {
printf("ERROR: getSettings is supposed to be a function!\n");
ReleaseGlobalDictionary( globals );
Py_XDECREF(idprop);
return;
}
if (!retval) {
BPY_Err_Handle(con->text->id.name);
con->flag |= PYCON_SCRIPTERROR;
/* free temp objects */
ReleaseGlobalDictionary(globals);
Py_XDECREF(idprop);
return;
}
else {
/* clear globals */
ReleaseGlobalDictionary(globals);
/* free temp objects */
Py_XDECREF(idprop);
Py_DECREF(retval);
return;
}
}
/* Update function, it gets rid of pydrivers global dictionary, forcing
* BPY_pydriver_eval to recreate it. This function is used to force
* reloading the Blender text module "pydrivers.py", if available, so
* updates in it reach pydriver evaluation. */
void BPY_pydriver_update(void)
{
if (bpy_pydriver_Dict) { /* free the global dict used by pydrivers */
PyDict_Clear(bpy_pydriver_Dict);
Py_DECREF(bpy_pydriver_Dict);
bpy_pydriver_Dict = NULL;
}
return;
}
/* for depsgraph.c, runs py expr once to collect all refs. made
* to objects (self refs. to the object that owns the py driver
* are not allowed). */
struct Object **BPY_pydriver_get_objects(IpoDriver *driver)
{
/*if (!driver || !driver->ob || driver->name[0] == '\0')
return NULL;*/
/*PyErr_Clear();*/
/* clear the flag that marks invalid python expressions */
driver->flag &= ~IPO_DRIVER_FLAG_INVALID;
/* tell we're running a pydriver, so Get() functions know they need
* to add the requested obj to our list */
bpy_pydriver_running(1);
/* append driver owner object as the 1st ob in the list;
* we put it there to make sure it is not itself referenced in
* its pydriver expression */
bpy_pydriver_appendToList(driver->ob);
/* this will append any other ob referenced in expr (driver->name)
* or set the driver's error flag if driver's py expression fails */
BPY_pydriver_eval(driver);
bpy_pydriver_running(0); /* ok, we're done */
return bpy_pydriver_obArrayFromList(); /* NULL if eval failed */
}
/* This evals py driver expressions, 'expr' is a Python expression that
* should evaluate to a float number, which is returned. */
float BPY_pydriver_eval(IpoDriver *driver)
{
char *expr = NULL;
PyObject *retval, *floatval, *bpy_ob = NULL;
float result = 0.0f; /* default return */
int setitem_retval;
if (!driver) return result;
expr = driver->name; /* the py expression to be evaluated */
if (!expr || expr[0]=='\0') return result;
if (!bpy_pydriver_Dict) {
if (bpy_pydriver_create_dict() != 0) {
fprintf(stderr, "Pydriver error: couldn't create Python dictionary");
return result;
}
}
if (driver->ob)
bpy_ob = Object_CreatePyObject(driver->ob);
if (!bpy_ob) {
Py_INCREF(Py_None);
bpy_ob = Py_None;
}
setitem_retval = EXPP_dict_set_item_str(bpy_pydriver_Dict, "self", bpy_ob);
if( !setup_armature_weakrefs()){
fprintf( stderr, "Oops - weakref dict setup\n");
return result;
}
retval = PyRun_String(expr, Py_eval_input, bpy_pydriver_Dict,
bpy_pydriver_Dict);
if (retval == NULL) {
return pydriver_error(driver);
}
floatval = PyNumber_Float(retval);
Py_DECREF(retval);
if (floatval == NULL)
return pydriver_error(driver);
result = (float)PyFloat_AsDouble(floatval);
Py_DECREF(floatval);
/* remove 'self', since this dict is also used by py buttons */
if (setitem_retval == 0) PyDict_DelItemString(bpy_pydriver_Dict, "self");
/* all fine, make sure the "invalid expression" flag is cleared */
driver->flag &= ~IPO_DRIVER_FLAG_INVALID;
return result;
}
/* Button Python Evaluation */
/* Python evaluation for gui buttons:
* users can write any valid Python expression (that evals to an int or float)
* inside Blender's gui number buttons and have them evaluated to their
* actual int or float value.
*
* The global dict used for pydrivers is also used here, so all imported
* modules for pydrivers (including the pydrivers.py Blender text) are
* available for button py eval, too. */
static int bpy_button_eval_error(char *expr) {
if (bpy_pydriver_oblist)
bpy_pydriver_freeList();
if (bpy_pydriver_Dict) { /* free the persistent global dict */
/* it's the same dict used by pydrivers */
PyDict_Clear(bpy_pydriver_Dict);
Py_DECREF(bpy_pydriver_Dict);
bpy_pydriver_Dict = NULL;
}
fprintf(stderr, "\nError in button evaluation:\nThis is the failed Python expression:\n'%s'\n\n", expr);
PyErr_Print();
return -1;
}
int BPY_button_eval(char *expr, double *value)
{
PyObject *retval, *floatval;
if (!value || !expr || expr[0]=='\0') return -1;
*value = 0.0; /* default value */
if (!bpy_pydriver_Dict) {
if (bpy_pydriver_create_dict() != 0) {
fprintf(stderr,
"Button Python Eval error: couldn't create Python dictionary");
return -1;
}
}
if( !setup_armature_weakrefs()){
fprintf(stderr, "Oops - weakref dict\n");
return -1;
}
retval = PyRun_String(expr, Py_eval_input, bpy_pydriver_Dict,
bpy_pydriver_Dict);
if (retval == NULL) {
return bpy_button_eval_error(expr);
}
else {
floatval = PyNumber_Float(retval);
Py_DECREF(retval);
}
if (floatval == NULL)
return bpy_button_eval_error(expr);
else {
*value = (float)PyFloat_AsDouble(floatval);
Py_DECREF(floatval);
}
return 0; /* successful exit */
}
/*****************************************************************************/
/* ScriptLinks */
/*****************************************************************************/
/*****************************************************************************/
/* Description: */
/* Notes: Not implemented yet */
/*****************************************************************************/
void BPY_clear_bad_scriptlinks( struct Text *byebye )
{
/*
BPY_clear_bad_scriptlist(getObjectList(), byebye);
BPY_clear_bad_scriptlist(getLampList(), byebye);
BPY_clear_bad_scriptlist(getCameraList(), byebye);
BPY_clear_bad_scriptlist(getMaterialList(), byebye);
BPY_clear_bad_scriptlist(getWorldList(), byebye);
BPY_clear_bad_scriptlink(&scene_getCurrent()->id, byebye);
allqueue(REDRAWBUTSSCRIPT, 0);
*/
return;
}
/*****************************************************************************
* Description: Loop through all scripts of a list of object types, and
* execute these scripts.
* For the scene, only the current active scene the scripts are
* executed (if any).
*****************************************************************************/
void BPY_do_all_scripts( short event )
{
DoAllScriptsFromList( &( G.main->object ), event );
DoAllScriptsFromList( &( G.main->lamp ), event );
DoAllScriptsFromList( &( G.main->camera ), event );
DoAllScriptsFromList( &( G.main->mat ), event );
DoAllScriptsFromList( &( G.main->world ), event );
BPY_do_pyscript( &( G.scene->id ), event );
return;
}
/*****************************************************************************
* Description: Execute a Python script when an event occurs. The following
* events are possible: frame changed, load script and redraw.
* Only events happening to one of the following object types
* are handled: Object, Lamp, Camera, Material, World and
* Scene.
*****************************************************************************/
static ScriptLink *ID_getScriptlink( ID * id )
{
switch ( MAKE_ID2( id->name[0], id->name[1] ) ) {
case ID_OB:
return &( ( Object * ) id )->scriptlink;
case ID_LA:
return &( ( Lamp * ) id )->scriptlink;
case ID_CA:
return &( ( Camera * ) id )->scriptlink;
case ID_MA:
return &( ( Material * ) id )->scriptlink;
case ID_WO:
return &( ( World * ) id )->scriptlink;
case ID_SCE:
return &( ( Scene * ) id )->scriptlink;
default:
return NULL;
}
}
int BPY_has_onload_script( void )
{
ScriptLink *slink = &G.scene->scriptlink;
int i;
if( !slink || !slink->totscript )
return 0;
for( i = 0; i < slink->totscript; i++ ) {
if( ( slink->flag[i] == SCRIPT_ONLOAD )
&& ( slink->scripts[i] != NULL ) )
return 1;
}
return 0;
}
void BPY_do_pyscript( ID * id, short event )
{
ScriptLink *scriptlink;
if( !id ) return;
scriptlink = ID_getScriptlink( id );
if( scriptlink && scriptlink->totscript ) {
PyObject *value;
PyObject *dict;
PyObject *ret;
int index, during_slink = during_scriptlink( );
/* invalid scriptlinks (new .blend was just loaded), return */
if( during_slink < 0 )
return;
if( !setup_armature_weakrefs()){
printf("Oops - weakref dict, this is a bug\n");
return;
}
value = GetPyObjectFromID( id );
if( !value){
printf("Oops - could not get a valid python object for Blender.link, this is a bug\n");
return;
}
/* tell we're running a scriptlink. The sum also tells if this script
* is running nested inside another. Blender.Load needs this info to
* avoid trouble with invalid slink pointers. */
during_slink++;
disable_where_scriptlink( (short)during_slink );
/* set globals in Blender module to identify scriptlink */
EXPP_dict_set_item_str( g_blenderdict, "bylink", EXPP_incr_ret_True() );
EXPP_dict_set_item_str( g_blenderdict, "link", value );
EXPP_dict_set_item_str( g_blenderdict, "event",
PyString_FromString( event_to_name
( event ) ) );
if (event == SCRIPT_POSTRENDER) event = SCRIPT_RENDER;
for( index = 0; index < scriptlink->totscript; index++ ) {
if( ( scriptlink->flag[index] == event ) &&
( scriptlink->scripts[index] != NULL ) ) {
dict = CreateGlobalDictionary( );
ret = RunPython( ( Text * ) scriptlink->
scripts[index], dict );
ReleaseGlobalDictionary( dict );
if( !ret ) {
/* Failed execution of the script */
BPY_Err_Handle( scriptlink->
scripts[index]->name +
2 );
//BPY_end_python ();
//BPY_start_python ();
} else {
Py_DECREF( ret );
}
/* If a scriptlink has just loaded a new .blend file, the
* scriptlink pointer became invalid (see api2_2x/Blender.c),
* so we stop here. */
if( during_scriptlink( ) == -1 ) {
during_slink = 1;
break;
}
}
}
disable_where_scriptlink( (short)(during_slink - 1) );
/* cleanup bylink flag and clear link so PyObject
* can be released
*/
EXPP_dict_set_item_str( g_blenderdict, "bylink", EXPP_incr_ret_False() );
PyDict_SetItemString( g_blenderdict, "link", Py_None );
EXPP_dict_set_item_str( g_blenderdict, "event",
PyString_FromString( "" ) );
}
}
/* SPACE HANDLERS */
/* These are special script links that can be assigned to ScrArea's to
* (EVENT type) receive events sent to a given space (and use or ignore them) or
* (DRAW type) be called after the space is drawn, to draw anything on top of
* the space area. */
/* How to add space handlers to other spaces:
* - add the space event defines to DNA_scriptlink_types.h, as done for
* 3d view: SPACEHANDLER_VIEW3D_EVENT, for example;
* - add the new defines to Blender.SpaceHandler dictionary in Blender.c;
* - check space.c for how to call the event handlers;
* - check drawview.c for how to call the draw handlers;
* - check header_view3d.c for how to add the "Space Handler Scripts" menu.
* Note: DRAW handlers should be called with 'event = 0', chech drawview.c */
int BPY_has_spacehandler(Text *text, ScrArea *sa)
{
ScriptLink *slink;
int index;
if (!sa || !text) return 0;
slink = &sa->scriptlink;
for (index = 0; index < slink->totscript; index++) {
if (slink->scripts[index] && (slink->scripts[index] == (ID *)text))
return 1;
}
return 0;
}
int BPY_is_spacehandler(Text *text, char spacetype)
{
TextLine *tline = text->lines.first;
unsigned short type = 0;
if (tline && (tline->len > 10)) {
char *line = tline->line;
/* Expected format: # SPACEHANDLER.SPACE.TYPE
* Ex: # SPACEHANDLER.VIEW3D.DRAW
* The actual checks are forgiving, so slight variations also work. */
if (line && line[0] == '#' && strstr(line, "HANDLER")) {
line++; /* skip '#' */
/* only done for 3D View right now, trivial to add for others: */
switch (spacetype) {
case SPACE_VIEW3D:
if (strstr(line, "3D")) { /* VIEW3D, 3DVIEW */
if (strstr(line, "DRAW")) type = SPACEHANDLER_VIEW3D_DRAW;
else if (strstr(line, "EVENT")) type = SPACEHANDLER_VIEW3D_EVENT;
}
break;
}
}
}
return type; /* 0 if not a space handler */
}
int BPY_del_spacehandler(Text *text, ScrArea *sa)
{
ScriptLink *slink;
int i, j;
if (!sa || !text) return -1;
slink = &sa->scriptlink;
if (slink->totscript < 1) return -1;
for (i = 0; i < slink->totscript; i++) {
if (text == (Text *)slink->scripts[i]) {
for (j = i; j < slink->totscript - 1; j++) {
slink->flag[j] = slink->flag[j+1];
slink->scripts[j] = slink->scripts[j+1];
}
slink->totscript--;
/* like done in buttons_script.c we just free memory
* if all slinks have been removed -- less fragmentation,
* these should be quite small arrays */
if (slink->totscript == 0) {
if (slink->scripts) MEM_freeN(slink->scripts);
if (slink->flag) MEM_freeN(slink->flag);
break;
}
}
}
return 0;
}
int BPY_add_spacehandler(Text *text, ScrArea *sa, char spacetype)
{
unsigned short handlertype;
if (!sa || !text) return -1;
handlertype = (unsigned short)BPY_is_spacehandler(text, spacetype);
if (handlertype) {
ScriptLink *slink = &sa->scriptlink;
void *stmp, *ftmp;
unsigned short space_event = SPACEHANDLER_VIEW3D_EVENT;
/* extend slink */
stmp= slink->scripts;
slink->scripts= MEM_mallocN(sizeof(ID*)*(slink->totscript+1),
"spacehandlerscripts");
ftmp= slink->flag;
slink->flag= MEM_mallocN(sizeof(short*)*(slink->totscript+1),
"spacehandlerflags");
if (slink->totscript) {
memcpy(slink->scripts, stmp, sizeof(ID*)*(slink->totscript));
MEM_freeN(stmp);
memcpy(slink->flag, ftmp, sizeof(short)*(slink->totscript));
MEM_freeN(ftmp);
}
switch (spacetype) {
case SPACE_VIEW3D:
if (handlertype == 1) space_event = SPACEHANDLER_VIEW3D_EVENT;
else space_event = SPACEHANDLER_VIEW3D_DRAW;
break;
default:
break;
}
slink->scripts[slink->totscript] = (ID *)text;
slink->flag[slink->totscript]= space_event;
slink->totscript++;
slink->actscript = slink->totscript;
}
return 0;
}
int BPY_do_spacehandlers( ScrArea *sa, unsigned short event,
unsigned short space_event )
{
ScriptLink *scriptlink;
int retval = 0;
if (!sa || !(G.f & G_DOSCRIPTLINKS)) return 0;
scriptlink = &sa->scriptlink;
if (scriptlink->totscript > 0) {
PyObject *dict;
PyObject *ret;
int index, during_slink = during_scriptlink();
/* invalid scriptlinks (new .blend was just loaded), return */
if (during_slink < 0) return 0;
/* tell we're running a scriptlink. The sum also tells if this script
* is running nested inside another. Blender.Load needs this info to
* avoid trouble with invalid slink pointers.
* Update (test): allow EVENT space handlers to call file/image selectors,
* still disabled for DRAW space handlers: */
if (event == 0) { /* event = 0: DRAW space handler */
during_slink++;
disable_where_scriptlink( (short)during_slink );
}
if( !setup_armature_weakrefs()){
printf("Oops - weakref dict, this is a bug\n");
return 0;
}
/* set globals in Blender module to identify space handler scriptlink */
EXPP_dict_set_item_str(g_blenderdict, "bylink", EXPP_incr_ret_True());
/* unlike normal scriptlinks, here Blender.link is int (space event type) */
EXPP_dict_set_item_str(g_blenderdict, "link", PyInt_FromLong(space_event));
/* note: DRAW space_events set event to 0 */
EXPP_dict_set_item_str(g_blenderdict, "event", PyInt_FromLong(event));
/* now run all assigned space handlers for this space and space_event */
for( index = 0; index < scriptlink->totscript; index++ ) {
/* for DRAW handlers: */
if (event == 0) {
glPushAttrib(GL_ALL_ATTRIB_BITS);
glMatrixMode(GL_PROJECTION);
glPushMatrix();
glMatrixMode(GL_MODELVIEW);
glPushMatrix();
}
if( ( scriptlink->flag[index] == space_event ) &&
( scriptlink->scripts[index] != NULL ) ) {
dict = CreateGlobalDictionary();
ret = RunPython( ( Text * ) scriptlink->scripts[index], dict );
ReleaseGlobalDictionary( dict );
if (!ret) { /* Failed execution of the script */
BPY_Err_Handle( scriptlink->scripts[index]->name+2 );
} else {
Py_DECREF(ret);
/* an EVENT type (event != 0) script can either accept an event or
* ignore it:
* if the script sets Blender.event to None it accepted it;
* otherwise the space's event handling callback that called us
* can go on processing the event */
if (event && (PyDict_GetItemString(g_blenderdict,"event") == Py_None))
retval = 1; /* event was swallowed */
}
/* If a scriptlink has just loaded a new .blend file, the
* scriptlink pointer became invalid (see api2_2x/Blender.c),
* so we stop here. */
if( during_scriptlink( ) == -1 ) {
during_slink = 1;
if (event == 0) glPopAttrib();
break;
}
}
/* for DRAW handlers: */
if (event == 0) {
glMatrixMode(GL_PROJECTION);
glPopMatrix();
glMatrixMode(GL_MODELVIEW);
glPopMatrix();
glPopAttrib();
disable_where_scriptlink( (short)(during_slink - 1) );
}
}
EXPP_dict_set_item_str(g_blenderdict, "bylink", EXPP_incr_ret_False());
PyDict_SetItemString(g_blenderdict, "link", Py_None );
EXPP_dict_set_item_str(g_blenderdict, "event", PyString_FromString(""));
}
/* retval:
* space_event is of type EVENT:
* 0 - event was returned,
* 1 - event was processed;
* space_event is of type DRAW:
* 0 always */
return retval;
}
/*****************************************************************************
* Description:
* Notes:
*****************************************************************************/
void BPY_free_scriptlink( struct ScriptLink *slink )
{
if( slink->totscript ) {
if( slink->flag ) {
MEM_freeN( slink->flag );
slink->flag= NULL;
}
if( slink->scripts ) {
MEM_freeN( slink->scripts );
slink->scripts= NULL;
}
}
return;
}
static int CheckAllSpaceHandlers(Text *text)
{
bScreen *screen;
ScrArea *sa;
ScriptLink *slink;
int fixed = 0;
for (screen = G.main->screen.first; screen; screen = screen->id.next) {
for (sa = screen->areabase.first; sa; sa = sa->next) {
slink = &sa->scriptlink;
if (!slink->totscript) continue;
if (BPY_del_spacehandler(text, sa) == 0) fixed++;
}
}
return fixed;
}
static int CheckAllScriptsFromList( ListBase * list, Text * text )
{
ID *id;
ScriptLink *scriptlink;
int index;
int fixed = 0;
id = list->first;
while( id != NULL ) {
scriptlink = ID_getScriptlink( id );
if( scriptlink && scriptlink->totscript ) {
for( index = 0; index < scriptlink->totscript; index++) {
if ((Text *)scriptlink->scripts[index] == text) {
scriptlink->scripts[index] = NULL;
fixed++;
}
}
}
id = id->next;
}
return fixed;
}
/* When a Text is deleted, we need to unlink it from eventual scriptlinks */
int BPY_check_all_scriptlinks( Text * text )
{
int fixed = 0;
fixed += CheckAllScriptsFromList( &( G.main->object ), text );
fixed += CheckAllScriptsFromList( &( G.main->lamp ), text );
fixed += CheckAllScriptsFromList( &( G.main->camera ), text );
fixed += CheckAllScriptsFromList( &( G.main->mat ), text );
fixed += CheckAllScriptsFromList( &( G.main->world ), text );
fixed += CheckAllScriptsFromList( &( G.main->scene ), text );
fixed += CheckAllSpaceHandlers(text);
return fixed;
}
/*****************************************************************************
* Description:
* Notes:
*****************************************************************************/
void BPY_copy_scriptlink( struct ScriptLink *scriptlink )
{
void *tmp;
if( scriptlink->totscript ) {
tmp = scriptlink->scripts;
scriptlink->scripts =
MEM_mallocN( sizeof( ID * ) * scriptlink->totscript,
"scriptlistL" );
memcpy( scriptlink->scripts, tmp,
sizeof( ID * ) * scriptlink->totscript );
tmp = scriptlink->flag;
scriptlink->flag =
MEM_mallocN( sizeof( short ) * scriptlink->totscript,
"scriptlistF" );
memcpy( scriptlink->flag, tmp,
sizeof( short ) * scriptlink->totscript );
}
return;
}
/****************************************************************************
* Description:
* Notes: Not implemented yet
*****************************************************************************/
int BPY_call_importloader( char *name )
{ /* XXX Should this function go away from Blender? */
printf( "In BPY_call_importloader(name=%s)\n", name );
return ( 0 );
}
/*****************************************************************************
* Private functions
*****************************************************************************/
/*****************************************************************************
* Description: This function executes the python script passed by text.
* The Python dictionary containing global variables needs to
* be passed in globaldict.
*****************************************************************************/
PyObject *RunPython( Text * text, PyObject * globaldict )
{
char *buf = NULL;
/* The script text is compiled to Python bytecode and saved at text->compiled
* to speed-up execution if the user executes the script multiple times */
if( !text->compiled ) { /* if it wasn't already compiled, do it now */
buf = txt_to_buf( text );
text->compiled =
Py_CompileString( buf, GetName( text ),
Py_file_input );
MEM_freeN( buf );
if( PyErr_Occurred( ) ) {
BPY_free_compiled_text( text );
return NULL;
}
}
return PyEval_EvalCode( text->compiled, globaldict, globaldict );
}
/*****************************************************************************
* Description: This function returns the value of the name field of the
* given Text struct.
*****************************************************************************/
char *GetName( Text * text )
{
return ( text->id.name + 2 );
}
/*****************************************************************************
* Description: This function creates a new Python dictionary object.
*****************************************************************************/
PyObject *CreateGlobalDictionary( void )
{
PyObject *dict = PyDict_New( );
PyDict_SetItemString( dict, "__builtins__", PyEval_GetBuiltins( ) );
EXPP_dict_set_item_str( dict, "__name__",
PyString_FromString( "__main__" ) );
return dict;
}
/*****************************************************************************
* Description: This function deletes a given Python dictionary object.
*****************************************************************************/
void ReleaseGlobalDictionary( PyObject * dict )
{
PyDict_Clear( dict );
Py_DECREF( dict ); /* Release dictionary. */
return;
}
/***************************************************************************
* Description: This function runs all scripts (if any) present in the
* list argument. The event by which the function has been
* called, is passed in the event argument.
*****************************************************************************/
void DoAllScriptsFromList( ListBase * list, short event )
{
ID *id;
id = list->first;
while( id != NULL ) {
BPY_do_pyscript( id, event );
id = id->next;
}
return;
}
PyObject *importText( char *name )
{
Text *text;
char *txtname;
char *buf = NULL;
int namelen = strlen( name );
txtname = malloc( namelen + 3 + 1 );
if( !txtname )
return NULL;
memcpy( txtname, name, namelen );
memcpy( &txtname[namelen], ".py", 4 );
text = ( Text * ) & ( G.main->text.first );
while( text ) {
if( !strcmp( txtname, GetName( text ) ) )
break;
text = text->id.next;
}
if( !text ) {
free( txtname );
return NULL;
}
if( !text->compiled ) {
buf = txt_to_buf( text );
text->compiled =
Py_CompileString( buf, GetName( text ),
Py_file_input );
MEM_freeN( buf );
if( PyErr_Occurred( ) ) {
PyErr_Print( );
BPY_free_compiled_text( text );
free( txtname );
return NULL;
}
}
free( txtname );
return PyImport_ExecCodeModule( name, text->compiled );
}
static PyMethodDef bimport[] = {
{"blimport", blender_import, METH_VARARGS, "our own import"}
};
PyObject *blender_import( PyObject * self, PyObject * args )
{
PyObject *exception, *err, *tb;
char *name;
PyObject *globals = NULL, *locals = NULL, *fromlist = NULL;
PyObject *m;
if( !PyArg_ParseTuple( args, "s|OOO:bimport",
&name, &globals, &locals, &fromlist ) )
return NULL;
m = PyImport_ImportModuleEx( name, globals, locals, fromlist );
if( m )
return m;
else
PyErr_Fetch( &exception, &err, &tb ); /*restore for probable later use */
m = importText( name );
if( m ) { /* found module, ignore above exception */
PyErr_Clear( );
Py_XDECREF( exception );
Py_XDECREF( err );
Py_XDECREF( tb );
printf( "imported from text buffer...\n" );
} else {
PyErr_Restore( exception, err, tb );
}
return m;
}
void init_ourImport( void )
{
PyObject *m, *d;
PyObject *import = PyCFunction_New( bimport, NULL );
m = PyImport_AddModule( "__builtin__" );
d = PyModule_GetDict( m );
EXPP_dict_set_item_str( d, "__import__", import );
}
/*
* find in-memory module and recompile
*/
static PyObject *reimportText( PyObject *module )
{
Text *text;
char *txtname;
char *name;
char *buf = NULL;
/* get name, filename from the module itself */
txtname = PyModule_GetFilename( module );
name = PyModule_GetName( module );
if( !txtname || !name)
return NULL;
/* look up the text object */
text = ( Text * ) & ( G.main->text.first );
while( text ) {
if( !strcmp( txtname, GetName( text ) ) )
break;
text = text->id.next;
}
/* uh-oh.... didn't find it */
if( !text )
return NULL;
/* if previously compiled, free the object */
/* (can't see how could be NULL, but check just in case) */
if( text->compiled ){
Py_DECREF( (PyObject *)text->compiled );
}
/* compile the buffer */
buf = txt_to_buf( text );
text->compiled = Py_CompileString( buf, GetName( text ),
Py_file_input );
MEM_freeN( buf );
/* if compile failed.... return this error */
if( PyErr_Occurred( ) ) {
PyErr_Print( );
BPY_free_compiled_text( text );
return NULL;
}
/* make into a module */
return PyImport_ExecCodeModule( name, text->compiled );
}
/*
* our reload() module, to handle reloading in-memory scripts
*/
static PyObject *blender_reload( PyObject * self, PyObject * args )
{
PyObject *exception, *err, *tb;
PyObject *module = NULL;
PyObject *newmodule = NULL;
/* check for a module arg */
if( !PyArg_ParseTuple( args, "O:breload", &module ) )
return NULL;
/* try reimporting from file */
newmodule = PyImport_ReloadModule( module );
if( newmodule )
return newmodule;
/* no file, try importing from memory */
PyErr_Fetch( &exception, &err, &tb ); /*restore for probable later use */
newmodule = reimportText( module );
if( newmodule ) { /* found module, ignore above exception */
PyErr_Clear( );
Py_XDECREF( exception );
Py_XDECREF( err );
Py_XDECREF( tb );
} else
PyErr_Restore( exception, err, tb );
return newmodule;
}
static PyMethodDef breload[] = {
{"blreload", blender_reload, METH_VARARGS, "our own reload"}
};
void init_ourReload( void )
{
PyObject *m, *d;
PyObject *reload = PyCFunction_New( breload, NULL );
m = PyImport_AddModule( "__builtin__" );
d = PyModule_GetDict( m );
EXPP_dict_set_item_str( d, "reload", reload );
}
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