diff options
Diffstat (limited to 'src/ephy-python-extension.c')
| -rw-r--r-- | src/ephy-python-extension.c | 370 |
1 files changed, 370 insertions, 0 deletions
diff --git a/src/ephy-python-extension.c b/src/ephy-python-extension.c new file mode 100644 index 000000000..190327f73 --- /dev/null +++ b/src/ephy-python-extension.c @@ -0,0 +1,370 @@ +/* + * Copyright (C) 2003 Marco Pesenti Gritti + * Copyright (C) 2003 Christian Persch + * Copyright (C) 2004, 2005 Adam Hooper + * + * 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, 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. + * + * $Id$ + */ + +#include "Python.h" + +#include "config.h" + +#include "ephy-python-extension.h" + +#include <pygobject.h> + +#include "ephy-extension.h" +#include "ephy-window.h" +#include "ephy-tab.h" +#include "ephy-file-helpers.h" +#include "ephy-debug.h" + +#define EPHY_PYTHON_EXTENSION_GET_PRIVATE(object) (G_TYPE_INSTANCE_GET_PRIVATE ((object), EPHY_TYPE_PYTHON_EXTENSION, EphyPythonExtensionPrivate)) + +struct _EphyPythonExtensionPrivate +{ + char *filename; + PyObject *module; +}; + +enum +{ + PROP_0, + PROP_FILENAME +}; + +static GObjectClass *parent_class = NULL; + +static int +set_python_search_path (const char *filename) +{ + char *dirname; + char *dot_dir; + int ret = 2; + PyObject *sys_path; + PyObject *pValue; + + sys_path = PySys_GetObject ("path"); + + /* Systems extensions dir */ + pValue = PyString_FromString (EXTENSIONS_DIR); + PyList_Insert (sys_path, 0, pValue); + Py_DECREF (pValue); + + /* Home dir */ + dot_dir = g_strconcat (ephy_dot_dir (), "/extensions", NULL); + pValue = PyString_FromString (dot_dir); + PyList_Insert (sys_path, 0, pValue); + Py_DECREF (pValue); + g_free (dot_dir); + + /* Absolute path specified in .xml file */ + dirname = g_path_get_dirname (filename); + if (g_path_is_absolute (dirname)) + { + pValue = PyString_FromString (dirname); + PyList_Insert (sys_path, 0, pValue); + Py_DECREF (pValue); + ret++; + } + g_free (dirname); + + return ret; +} + +static void +unset_python_search_path (int num_dirs) +{ + PyObject *sys_path = PySys_GetObject ("path"); + + PySequence_DelSlice (sys_path, 0, num_dirs); +} + +static void +ephy_python_extension_init (EphyPythonExtension *extension) +{ + LOG ("EphyPythonExtension initialising"); + + extension->priv = EPHY_PYTHON_EXTENSION_GET_PRIVATE (extension); +} + +static GObject * +ephy_python_extension_constructor (GType type, + guint n_construct_properties, + GObjectConstructParam *construct_params) +{ + GObject *object; + EphyPythonExtension *ext; + char *module_name; /* filename minus optional ".py" */ + /* Note: could equally be a directory */ + PyObject *pModules, *pModule, *pReload; + + int num_temp_paths; + + object = parent_class->constructor (type, n_construct_properties, + construct_params); + + ext = EPHY_PYTHON_EXTENSION (object); + + module_name = g_path_get_basename (ext->priv->filename); + + num_temp_paths = set_python_search_path (ext->priv->filename); + + pModules = PySys_GetObject ("modules"); + g_assert (pModules != NULL); + + pModule = PyDict_GetItemString (pModules, module_name); + + if (pModule == NULL) + { + pModule = PyImport_ImportModule (module_name); + + if (pModule == NULL) + { + PyErr_Print (); + PyErr_Clear (); + g_warning ("Could not initialize Python module '%s'", + module_name); + } + } + else + { + pReload = PyImport_ReloadModule (pModule); + + if (pReload == NULL) + { + PyErr_Print (); + PyErr_Clear (); + g_warning ("Could not reload Python module '%s'\n" + "Falling back to previous version", + module_name); + } + else + { + Py_DECREF (pReload); + } + } + + unset_python_search_path (num_temp_paths); + + ext->priv->module = pModule; + + g_free (module_name); + + return object; +} + +static void +ephy_python_extension_finalize (GObject *object) +{ + EphyPythonExtension *extension = + EPHY_PYTHON_EXTENSION (object); + + LOG ("EphyPythonExtension finalizing"); + + g_free (extension->priv->filename); + Py_XDECREF (extension->priv->module); + + G_OBJECT_CLASS (parent_class)->finalize (object); +} + +static void +call_python_func (EphyExtension *extension, + const char *func_name, + EphyWindow *window, + EphyTab *tab) /* HACK: tab may be NULL */ +{ + PyObject *pDict, *pFunc; + PyObject *pArgs, *pValue, *pTab = NULL, *pWindow; + EphyPythonExtension *py_ext; + + py_ext = EPHY_PYTHON_EXTENSION (extension); + + /* Happens if the module load fails, e.g. python couldn't + * parse it, so be quiet about it, we will have already warned */ + if (py_ext->priv->module == NULL) + { + return; + } + + pDict = PyModule_GetDict (py_ext->priv->module); + pFunc = PyDict_GetItemString (pDict, func_name); + + if (pFunc && PyCallable_Check (pFunc)) + { + pArgs = PyTuple_New (tab == NULL ? 1 : 2); + + pWindow = pygobject_new (G_OBJECT (window)); + PyTuple_SetItem (pArgs, 0, pWindow); + + if (tab != NULL) + { + pTab = pygobject_new (G_OBJECT (tab)); + PyTuple_SetItem (pArgs, 1, pTab); + } + + pValue = PyObject_CallObject (pFunc, pArgs); + if (pValue == NULL) + { + PyErr_Print (); + PyErr_Clear (); + g_warning ("Python code for '%s' failed to execute", + func_name); + } + Py_XDECREF (pValue); + Py_DECREF (pArgs); + } + else + { + if (PyErr_Occurred ()) + { + PyErr_Print (); + PyErr_Clear (); + } + } +} + +static void +impl_attach_tab (EphyExtension *extension, + EphyWindow *window, + EphyTab *tab) +{ + call_python_func (extension, "attach_tab", window, tab); +} + +static void +impl_detach_tab (EphyExtension *extension, + EphyWindow *window, + EphyTab *tab) +{ + call_python_func (extension, "detach_tab", window, tab); + + g_idle_add ((GSourceFunc) PyGC_Collect, NULL); +} + +static void +impl_attach_window (EphyExtension *extension, + EphyWindow *window) +{ + call_python_func (extension, "attach_window", window, NULL); +} + +static void +impl_detach_window (EphyExtension *extension, + EphyWindow *window) +{ + call_python_func (extension, "detach_window", window, NULL); + + g_idle_add ((GSourceFunc) PyGC_Collect, NULL); +} + +static void +ephy_python_extension_iface_init (EphyExtensionIface *iface) +{ + iface->attach_tab = impl_attach_tab; + iface->detach_tab = impl_detach_tab; + iface->attach_window = impl_attach_window; + iface->detach_window = impl_detach_window; +} + +static void +ephy_python_extension_get_property (GObject *object, + guint prop_id, + GValue *value, + GParamSpec *pspec) +{ + /* no readable properties */ + g_return_if_reached (); +} + +static void +ephy_python_extension_set_property (GObject *object, + guint prop_id, + const GValue *value, + GParamSpec *pspec) +{ + EphyPythonExtension *ext = EPHY_PYTHON_EXTENSION (object); + + switch (prop_id) + { + case PROP_FILENAME: + ext->priv->filename = g_value_dup_string (value); + break; + default: + g_return_if_reached (); + } +} + +static void +ephy_python_extension_class_init (EphyPythonExtensionClass *klass) +{ + GObjectClass *object_class = G_OBJECT_CLASS (klass); + + parent_class = g_type_class_peek_parent (klass); + + object_class->finalize = ephy_python_extension_finalize; + object_class->constructor = ephy_python_extension_constructor; + object_class->get_property = ephy_python_extension_get_property; + object_class->set_property = ephy_python_extension_set_property; + + g_object_class_install_property + (object_class, + PROP_FILENAME, + g_param_spec_string ("filename", + "Filename", + "Filename", + NULL, + G_PARAM_WRITABLE | G_PARAM_CONSTRUCT_ONLY)); + + g_type_class_add_private (object_class, sizeof (EphyPythonExtensionPrivate)); +} + +GType +ephy_python_extension_get_type (void) +{ + static GType type = 0; + + if (G_UNLIKELY (type == 0)) + { + static const GTypeInfo our_info = + { + sizeof (EphyPythonExtensionClass), + NULL, /* base_init */ + NULL, /* base_finalize */ + (GClassInitFunc) ephy_python_extension_class_init, + NULL, + NULL, /* class_data */ + sizeof (EphyPythonExtension), + 0, /* n_preallocs */ + (GInstanceInitFunc) ephy_python_extension_init + }; + static const GInterfaceInfo extension_info = + { + (GInterfaceInitFunc) ephy_python_extension_iface_init, + NULL, + NULL + }; + + type = g_type_register_static (G_TYPE_OBJECT, "EphyPythonExtension", + &our_info, 0); + + g_type_add_interface_static (type, EPHY_TYPE_EXTENSION, &extension_info); + } + + return type; +} |