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-rw-r--r--plugins/python/python-plugin-loader.c191
1 files changed, 191 insertions, 0 deletions
diff --git a/plugins/python/python-plugin-loader.c b/plugins/python/python-plugin-loader.c
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+++ b/plugins/python/python-plugin-loader.c
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+ /* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*-
+ *
+ * Author: Johnny Jacob <jjohnny@novell.com>
+ *
+ * Copyright 2008 Novell, Inc. (www.novell.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * 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.
+ *
+ */
+
+#include <sys/types.h>
+#include <string.h>
+#include <Python.h>
+
+#include "python-plugin-loader.h"
+
+#define d(x)
+
+static void *epp_parent_class;
+
+typedef struct _EPluginPythonPrivate {
+ PyObject *pModule;
+ PyObject *pClass;
+ PyObject *pFunc;
+ PyObject *pDict;
+ GHashTable *methods;
+} EPluginPythonPrivate;
+
+#define epp ((EPluginPython *)ep)
+
+void * load_plugin_type_register_function (void *a, void *b);
+
+static char *
+get_xml_prop(xmlNodePtr node, const char *id)
+{
+ char *p = xmlGetProp(node, id);
+ char *out = NULL;
+
+ if (p) {
+ out = g_strdup(p);
+ xmlFree(p);
+ }
+
+ return out;
+}
+
+static void *
+epp_invoke(EPlugin *ep, const char *name, void *data)
+{
+ EPluginPythonPrivate *p = epp->priv;
+ PyObject *pModuleName, *pFunc;
+ PyObject *pInstance, *pValue = NULL;
+
+ /* we need to do this every time since we may be called from any thread for some uses */
+ Py_Initialize();
+
+ if (p->pModule == NULL) {
+ pModuleName = PyString_FromString(epp->module_name);
+
+ PyRun_SimpleString(g_strdup_printf ("import sys ; sys.path.insert(0, '%s')", epp->location));
+
+ p->pModule = PyImport_Import(pModuleName);
+
+ Py_DECREF(pModuleName); //Free
+
+ if (p->pModule == NULL) {
+ PyErr_Print();
+ g_warning("can't load python module '%s'", epp->location);
+ return NULL;
+ }
+
+ p->pDict = PyModule_GetDict(p->pModule);
+
+ if (epp->pClass) {
+ p->pClass = PyDict_GetItemString(p->pDict, epp->pClass);
+ }
+ }
+
+ if (p->pClass) {
+
+ if (PyCallable_Check(p->pClass))
+ pInstance = PyObject_CallObject(p->pClass, NULL);
+
+ pValue = PyObject_CallMethod(pInstance, name, NULL);
+
+ } else {
+
+ pFunc = PyDict_GetItemString(p->pDict, name);
+
+ if (pFunc && PyCallable_Check(pFunc))
+ pValue = PyObject_CallObject(pFunc, NULL);
+ else
+ PyErr_Print();
+ }
+
+ if (pValue) {
+ d(printf("%s(%d):%s: Result of call: %ld \n", __FILE__, __LINE__, __PRETTY_FUNCTION__, PyInt_AsLong(pValue)));
+ Py_DECREF(pValue);
+ /* Fixme */
+ return NULL;
+ } else
+ return NULL;
+}
+
+static int
+epp_construct(EPlugin *ep, xmlNodePtr root)
+{
+ if (((EPluginClass *)epp_parent_class)->construct(ep, root) == -1)
+ return -1;
+
+ epp->location = get_xml_prop(root, "location");
+ epp->module_name = get_xml_prop (root, "module_name");
+ epp->pClass = get_xml_prop(root, "pClass");
+
+ if (epp->location == NULL)
+ return -1;
+
+ return 0;
+}
+
+static void
+epp_finalise(GObject *o)
+{
+ EPlugin *ep = (EPlugin *)o;
+ EPluginPythonPrivate *p = epp->priv;
+
+ g_free(epp->location);
+ g_free(epp->module_name);
+ g_free(epp->pClass);
+
+ g_hash_table_destroy(p->methods);
+
+ g_free(epp->priv);
+
+ ((GObjectClass *)epp_parent_class)->finalize(o);
+}
+
+static void
+epp_class_init(EPluginClass *klass)
+{
+ ((GObjectClass *)klass)->finalize = epp_finalise;
+ klass->construct = epp_construct;
+ klass->invoke = epp_invoke;
+ klass->type = "python";
+}
+
+static void
+epp_init(GObject *o)
+{
+ EPlugin *ep = (EPlugin *)o;
+
+ epp->priv = g_malloc0(sizeof(*epp->priv));
+ epp->priv->methods = g_hash_table_new_full(
+ g_str_hash, g_str_equal,
+ (GDestroyNotify) g_free,
+ (GDestroyNotify) NULL);
+}
+
+void *
+load_plugin_type_register_function (void *a, void *b)
+{
+ static GType type = 0;
+
+ if (!type) {
+ static const GTypeInfo info = {
+ sizeof(EPluginPythonClass), NULL, NULL, (GClassInitFunc) epp_class_init, NULL, NULL,
+ sizeof(EPluginPython), 0, (GInstanceInitFunc) epp_init,
+ };
+
+ epp_parent_class = g_type_class_ref(e_plugin_get_type());
+ type = g_type_register_static(e_plugin_get_type(), "EPluginPython", &info, 0);
+ e_plugin_register_type (type);
+
+ d(printf("\nType EPluginPython registered from the python-plugin-loader\n"));
+
+ Py_Initialize(); //TODO : Does this mean i can cache the instance of pyobjects ?
+ }
+
+ return GUINT_TO_POINTER(type);
+}