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/* Python plug-in for dia
* Copyright (C) 1999 James Henstridge
* Copyright (C) 2000 Hans Breuer
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <Python.h>
#include <stdio.h>
#include <glib.h>
#include "intl.h"
#include "plug-ins.h"
#include "dia_dirs.h"
#include "pydia-error.h"
DIA_PLUGIN_CHECK_INIT
void initdia(void);
static gboolean
on_error_report (void)
{
if (PyErr_Occurred()) {
#ifndef G_OS_WIN32
PyErr_Print();
#else
/* On Win32 there is not necessary a console attached to the
* program, so delegate the stack dump to the error object,
* which finally uses g_print()
*/
PyObject *exc, *v, *tb, *ef;
PyErr_Fetch (&exc, &v, &tb);
ef = PyDiaError_New ("Initialization Error:", FALSE);
PyFile_WriteObject (exc, ef, 0);
PyFile_WriteObject (v, ef, 0);
PyTraceBack_Print(tb, ef);
Py_DECREF (ef);
Py_XDECREF (exc);
Py_XDECREF (v);
Py_XDECREF (tb);
#endif
return TRUE;
}
else
return FALSE;
}
static gboolean
dia_py_plugin_can_unload (PluginInfo *info)
{
/* until we can properly clean up the python plugin, it is not safe to
* unload it from a dia */
return FALSE; /* TRUE */
}
static void
dia_py_plugin_unload (PluginInfo *info)
{
/* should call filter_unregister_export () */
Py_Finalize ();
}
PluginInitResult
dia_plugin_init(PluginInfo *info)
{
gchar *python_argv[] = { "dia-python", NULL };
gchar *startup_file;
FILE *fp;
PyObject *__main__, *__file__;
if (Py_IsInitialized ()) {
g_warning ("Dia's Python embedding is not designed for concurrency.");
return DIA_PLUGIN_INIT_ERROR;
}
if (!dia_plugin_info_init(info, "Python",
_("Python scripting support"),
dia_py_plugin_can_unload,
dia_py_plugin_unload))
return DIA_PLUGIN_INIT_ERROR;
Py_SetProgramName("dia");
Py_Initialize();
PySys_SetArgv(1, python_argv);
/* Sanitize sys.path */
PyRun_SimpleString("import sys; sys.path = filter(None, sys.path)");
if (on_error_report())
return DIA_PLUGIN_INIT_ERROR;
initdia();
if (on_error_report())
return DIA_PLUGIN_INIT_ERROR;
#ifdef G_OS_WIN32
PySys_SetObject("stderr", PyDiaError_New (NULL, TRUE));
#endif
if (g_getenv ("DIA_PYTHON_PATH")) {
startup_file = g_build_filename (g_getenv ("DIA_PYTHON_PATH"), "python-startup.py", NULL);
} else {
startup_file = dia_get_data_directory("python-startup.py");
}
if (!startup_file) {
g_warning("could not find python-startup.py");
return DIA_PLUGIN_INIT_ERROR;
}
/* set __file__ in __main__ so that python-startup.py knows where it is */
__main__ = PyImport_AddModule("__main__");
__file__ = PyString_FromString(startup_file);
PyObject_SetAttrString(__main__, "__file__", __file__);
Py_DECREF(__file__);
#if defined(G_OS_WIN32) && (PY_VERSION_HEX >= 0x02040000)
/* this code should work for every supported Python version, but it is needed
* on win32 since Python 2.4 due to mixed runtime issues, i.e.
* crashing in PyRun_SimpleFile for python2(5|6)/msvcr(71|90)
* It is not enabled by default yet, because I could not get PyGtk using
* plug-ins to work at all with 2.5/2.6 */
{
gchar *startup_string = NULL;
gsize i, length = 0;
GError *error = NULL;
if (!g_file_get_contents(startup_file, &startup_string, &length, &error)) {
g_warning("Python: Couldn't find startup file %s\n%s\n",
startup_file, error->message);
g_error_free(error);
g_free(startup_file);
return DIA_PLUGIN_INIT_ERROR;
}
/* PyRun_SimpleString does not like the windows format */
for (i = 0; i < length; ++i)
if (startup_string[i] == '\r')
startup_string[i] = '\n';
if (PyRun_SimpleString(startup_string) != 0) {
g_warning("Python: Couldn't run startup file %s\n", startup_file);
}
g_free(startup_string);
}
#else
fp = fopen(startup_file, "r");
if (!fp) {
g_warning("Python: Couldn't find startup file %s\n", startup_file);
g_free(startup_file);
return DIA_PLUGIN_INIT_ERROR;
}
PyRun_SimpleFile(fp, startup_file);
#endif
g_free(startup_file);
if (on_error_report())
return DIA_PLUGIN_INIT_ERROR;
return DIA_PLUGIN_INIT_OK;
}
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