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/*
* e-plugin-python.c
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) version 3.
*
* 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with the program; if not, see <http://www.gnu.org/licenses/>
*
*
* Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
*
*/
/* Include <Python.h> first to avoid:
* warning: "_POSIX_C_SOURCE" redefined */
#include <Python.h>
#include "e-plugin-python.h"
#include <sys/types.h>
#include <string.h>
#define E_PLUGIN_PYTHON_GET_PRIVATE(obj) \
(G_TYPE_INSTANCE_GET_PRIVATE \
((obj), E_TYPE_PLUGIN_PYTHON, EPluginPythonPrivate))
struct _EPluginPythonPrivate {
PyObject *pModule;
PyObject *pClass;
PyObject *pFunc;
PyObject *pDict;
GHashTable *methods;
};
static gpointer parent_class;
static GType plugin_python_type;
static gchar *
get_xml_prop (xmlNodePtr node, const gchar *id)
{
xmlChar *prop;
gchar *out = NULL;
prop = xmlGetProp (node, (xmlChar *) id);
if (prop != NULL) {
out = g_strdup ((gchar *) prop);
xmlFree (prop);
}
return out;
}
static void
plugin_python_finalize (GObject *object)
{
EPluginPython *plugin_python;
plugin_python = E_PLUGIN_PYTHON (object);
g_free (plugin_python->location);
g_free (plugin_python->module_name);
g_free (plugin_python->pClass);
g_hash_table_destroy (plugin_python->priv->methods);
/* Chain up to parent's finalize() method. */
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static gint
plugin_python_construct (EPlugin *plugin, xmlNodePtr root)
{
EPluginPython *plugin_python;
/* Chain up to parent's construct() method. */
if (E_PLUGIN_CLASS (parent_class)->construct (plugin, root) == -1)
return -1;
plugin_python = E_PLUGIN_PYTHON (plugin);
plugin_python->location = get_xml_prop (root, "location");
plugin_python->module_name = get_xml_prop (root, "module_name");
plugin_python->pClass = get_xml_prop (root, "pClass");
return (plugin_python->location != NULL) ? 0 : -1;
}
static gpointer
plugin_python_invoke (EPlugin *plugin,
const gchar *name,
gpointer data)
{
EPluginPython *plugin_python;
EPluginPythonPrivate *priv;
PyObject *pModuleName, *pFunc;
PyObject *pValue = NULL;
plugin_python = E_PLUGIN_PYTHON (plugin);
priv = plugin_python->priv;
/* We need to do this every time since we may be called
* from any thread for some uses. */
Py_Initialize ();
if (priv->pModule == NULL) {
gchar *string;
pModuleName = PyString_FromString (plugin_python->module_name);
string = g_strdup_printf (
"import sys; "
"sys.path.insert(0, '%s')",
plugin_python->location);
PyRun_SimpleString (string);
g_free (string);
priv->pModule = PyImport_Import (pModuleName);
Py_DECREF (pModuleName); //Free
if (priv->pModule == NULL) {
PyErr_Print ();
g_warning (
"Can't load python module '%s'",
plugin_python->location);
return NULL;
}
priv->pDict = PyModule_GetDict (priv->pModule);
if (plugin_python->pClass != NULL) {
priv->pClass = PyDict_GetItemString (
priv->pDict, plugin_python->pClass);
}
}
if (priv->pClass) {
if (PyCallable_Check (priv->pClass)) {
PyObject *pInstance;
pInstance = PyObject_CallObject (priv->pClass, NULL);
pValue = PyObject_CallMethod (pInstance, (gchar *) name, NULL);
}
} else {
pFunc = PyDict_GetItemString (priv->pDict, name);
if (pFunc && PyCallable_Check (pFunc))
pValue = PyObject_CallObject (pFunc, NULL);
else
PyErr_Print ();
}
if (pValue) {
Py_DECREF (pValue);
/* Fixme */
return NULL;
} else
return NULL;
}
static void
plugin_python_class_init (EPluginPythonClass *class)
{
GObjectClass *object_class;
EPluginClass *plugin_class;
parent_class = g_type_class_peek_parent (class);
g_type_class_add_private (class, sizeof (EPluginPythonPrivate));
object_class = G_OBJECT_CLASS (class);
object_class->finalize = plugin_python_finalize;
plugin_class = E_PLUGIN_CLASS (class);
plugin_class->construct = plugin_python_construct;
plugin_class->invoke = plugin_python_invoke;
plugin_class->type = "python";
}
static void
plugin_python_init (EPluginPython *plugin_python)
{
GHashTable *methods;
methods = g_hash_table_new_full (
g_str_hash, g_str_equal,
(GDestroyNotify) g_free,
(GDestroyNotify) NULL);
plugin_python->priv = E_PLUGIN_PYTHON_GET_PRIVATE (plugin_python);
plugin_python->priv->methods = methods;
}
GType
e_plugin_python_get_type (void)
{
return plugin_python_type;
}
void
e_plugin_python_register_type (GTypeModule *type_module)
{
static const GTypeInfo type_info = {
sizeof (EPluginPythonClass),
(GBaseInitFunc) NULL,
(GBaseFinalizeFunc) NULL,
(GClassInitFunc) plugin_python_class_init,
(GClassFinalizeFunc) NULL,
NULL, /* class_data */
sizeof (EPluginPython),
0, /* n_preallocs */
(GInstanceInitFunc) plugin_python_init,
NULL /* value_table */
};
plugin_python_type = g_type_module_register_type (
type_module, E_TYPE_PLUGIN,
"EPluginPython", &type_info, 0);
/* TODO Does this mean I can cache the instance of pyobjects? */
Py_Initialize ();
}
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