initial import from Mate-Extra repo

1 files changed, 403 insertions, 0 deletions

diff --git a/src/caja-python.c b/src/caja-python.c
new file mode 100644
index 0000000..ac6d18b
--- /dev/null
+++ b/src/caja-python.c
@@ -0,0 +1,403 @@
+/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 4; tab-width: 4 -*- */
+/*
+ *  Copyright (C) 2004,2005 Johan Dahlin
+ *
+ *  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.
+ */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include <Python.h>
+#include <pygobject.h>
+#include <pygtk/pygtk.h>
+
+#include "caja-python.h"
+#include "caja-python-object.h"
+
+#include <libcaja-extension/caja-extension-types.h>
+
+static const GDebugKey caja_python_debug_keys[] = {
+	{"misc", CAJA_PYTHON_DEBUG_MISC},
+};
+static const guint caja_python_ndebug_keys = sizeof (caja_python_debug_keys) / sizeof (GDebugKey);
+CajaPythonDebug caja_python_debug;
+
+static gboolean caja_python_init_python(void);
+
+static GArray *all_types = NULL;
+
+
+static inline gboolean 
+np_init_pygobject(void)
+{
+    PyObject *gobject = PyImport_ImportModule("gobject");
+    if (gobject != NULL)
+    {
+        PyObject *mdict = PyModule_GetDict(gobject);
+        PyObject *cobject = PyDict_GetItemString(mdict, "_PyGObject_API");
+        if (PyCObject_Check(cobject))
+        {
+            _PyGObject_API = (struct _PyGObject_Functions *)PyCObject_AsVoidPtr(cobject);
+        }
+        else
+        {
+            PyErr_SetString(PyExc_RuntimeError,
+                            "could not find _PyGObject_API object");
+			PyErr_Print();
+			return FALSE;
+        }
+    }
+    else
+    {
+        PyErr_Print();
+        g_warning("could not import gobject");
+        return FALSE;
+    }
+	return TRUE;
+}
+
+static inline gboolean 
+np_init_pygtk(void)
+{
+    PyObject *pygtk = PyImport_ImportModule("gtk._gtk");
+    if (pygtk != NULL)
+    {
+#ifdef Py_CAPSULE_H
+		void *capsule = PyCapsule_Import("gtk._gtk._PyGtk_API", 0);
+		if (capsule)
+		{
+			_PyGtk_API = (struct _PyGtk_FunctionStruct*)capsule;
+		}
+#endif
+		if (!_PyGtk_API)
+		{
+			PyObject *module_dict = PyModule_GetDict(pygtk);
+			PyObject *cobject = PyDict_GetItemString(module_dict, "_PyGtk_API");
+			if (PyCObject_Check(cobject))
+			{
+				_PyGtk_API = (struct _PyGtk_FunctionStruct*)
+					PyCObject_AsVoidPtr(cobject);
+			}
+			else
+			{
+				PyErr_SetString(PyExc_RuntimeError,
+				                "could not find _PyGtk_API object");
+				PyErr_Print();
+				return FALSE;
+			}
+		}
+    }
+    else
+    {
+        PyErr_Print();
+        g_warning("could not import gtk._gtk");
+        return FALSE;
+    }
+	return TRUE;
+}
+
+
+static void
+caja_python_load_file(GTypeModule *type_module, 
+						  const gchar *filename)
+{
+	PyObject *main_module, *main_locals, *locals, *key, *value;
+	PyObject *module;
+	GType gtype;
+	Py_ssize_t pos = 0;
+	
+	debug_enter_args("filename=%s", filename);
+	
+	main_module = PyImport_AddModule("__main__");
+	if (main_module == NULL)
+	{
+		g_warning("Could not get __main__.");
+		return;
+	}
+	
+	main_locals = PyModule_GetDict(main_module);
+	module = PyImport_ImportModuleEx((char *) filename, main_locals, main_locals, NULL);
+	if (!module)
+	{
+		PyErr_Print();
+		return;
+	}
+	
+	locals = PyModule_GetDict(module);
+	
+	while (PyDict_Next(locals, &pos, &key, &value))
+	{
+		if (!PyType_Check(value))
+			continue;
+
+		if (PyObject_IsSubclass(value, (PyObject*)&PyCajaColumnProvider_Type) ||
+			PyObject_IsSubclass(value, (PyObject*)&PyCajaInfoProvider_Type) ||
+			PyObject_IsSubclass(value, (PyObject*)&PyCajaLocationWidgetProvider_Type) ||
+			PyObject_IsSubclass(value, (PyObject*)&PyCajaMenuProvider_Type) ||
+			PyObject_IsSubclass(value, (PyObject*)&PyCajaPropertyPageProvider_Type))
+		{
+			gtype = caja_python_object_get_type(type_module, value);
+			g_array_append_val(all_types, gtype);
+		}
+	}
+	
+	debug("Loaded python modules");
+}
+
+static void
+caja_python_load_dir (GTypeModule *module, 
+						  const char  *dirname)
+{
+	GDir *dir;
+	const char *name;
+	gboolean initialized = FALSE;
+
+	debug_enter_args("dirname=%s", dirname);
+	
+	dir = g_dir_open(dirname, 0, NULL);
+	if (!dir)
+		return;
+			
+	while ((name = g_dir_read_name(dir)))
+	{
+		if (g_str_has_suffix(name, ".py"))
+		{
+			char *modulename;
+			int len;
+
+			len = strlen(name) - 3;
+			modulename = g_new0(char, len + 1 );
+			strncpy(modulename, name, len);
+
+			if (!initialized)
+			{
+				PyObject *sys_path, *py_path;
+				
+				/* n-p python part is initialized on demand (or not
+				* at all if no extensions are found) */
+				if (!caja_python_init_python())
+				{
+					g_warning("caja_python_init_python failed");
+					g_dir_close(dir);
+				}
+				
+				/* sys.path.insert(0, dirname) */
+				sys_path = PySys_GetObject("path");
+				py_path = PyString_FromString(dirname);
+				PyList_Insert(sys_path, 0, py_path);
+				Py_DECREF(py_path);
+			}
+			caja_python_load_file(module, modulename);
+		}
+	}	
+}
+
+static gboolean
+caja_python_init_python (void)
+{
+	PyObject *pygtk, *mdict, *require;
+	PyObject *sys_path, *tmp, *caja, *gtk, *pygtk_version, *pygtk_required_version;
+	GModule *libpython;
+	char *argv[] = { "caja", NULL };
+
+	if (Py_IsInitialized())
+		return TRUE;
+
+  	debug("g_module_open " PY_LIB_LOC "/libpython" PYTHON_VERSION "." G_MODULE_SUFFIX ".1.0");
+	libpython = g_module_open(PY_LIB_LOC "/libpython" PYTHON_VERSION "." G_MODULE_SUFFIX ".1.0", 0);
+	if (!libpython)
+		g_warning("g_module_open libpython failed: %s", g_module_error());
+
+	debug("Py_Initialize");
+	Py_Initialize();
+	if (PyErr_Occurred())
+	{
+		PyErr_Print();
+		return FALSE;
+	}
+	
+	debug("PySys_SetArgv");
+	PySys_SetArgv(1, argv);
+	if (PyErr_Occurred())
+	{
+		PyErr_Print();
+		return FALSE;
+	}
+	
+	debug("Sanitize the python search path");
+	PyRun_SimpleString("import sys; sys.path = filter(None, sys.path)");
+	if (PyErr_Occurred())
+	{
+		PyErr_Print();
+		return FALSE;
+	}
+
+	/* pygtk.require("2.0") */
+	debug("pygtk.require(\"2.0\")");
+	pygtk = PyImport_ImportModule("pygtk");
+	if (!pygtk)
+	{
+		PyErr_Print();
+		return FALSE;
+	}
+	mdict = PyModule_GetDict(pygtk);
+	require = PyDict_GetItemString(mdict, "require");
+	PyObject_CallObject(require, Py_BuildValue("(S)", PyString_FromString("2.0")));
+	if (PyErr_Occurred())
+	{
+		PyErr_Print();
+		return FALSE;
+	}
+
+	/* import gobject */
+  	debug("init_pygobject");
+	if (!np_init_pygobject())
+	{
+		g_warning("pygobject initialization failed");
+		return FALSE;
+	}
+	
+	/* import gtk */
+	debug("init_pygtk");
+	if (!np_init_pygtk())
+	{
+		g_warning("pygtk initialization failed");
+		return FALSE;
+	}
+	
+	/* gobject.threads_init() */
+    debug("pyg_enable_threads");
+	setenv("PYGTK_USE_GIL_STATE_API", "", 0);
+	pyg_enable_threads();
+
+	/* gtk.pygtk_version < (2, 4, 0) */
+	gtk = PyImport_ImportModule("gtk");
+	mdict = PyModule_GetDict(gtk);
+	pygtk_version = PyDict_GetItemString(mdict, "pygtk_version");
+	pygtk_required_version = Py_BuildValue("(iii)", 2, 4, 0);
+	if (PyObject_Compare(pygtk_version, pygtk_required_version) == -1)
+	{
+		g_warning("PyGTK %s required, but %s found.",
+				  PyString_AsString(PyObject_Repr(pygtk_required_version)),
+				  PyString_AsString(PyObject_Repr(pygtk_version)));
+		Py_DECREF(pygtk_required_version);
+		return FALSE;
+	}
+	Py_DECREF(pygtk_required_version);
+	
+	/* sys.path.insert(., ...) */
+	debug("sys.path.insert(0, ...)");
+	sys_path = PySys_GetObject("path");
+	PyList_Insert(sys_path, 0,
+				  (tmp = PyString_FromString(CAJA_LIBDIR "/caja-python")));
+	Py_DECREF(tmp);
+	
+	/* import caja */
+	g_setenv("INSIDE_CAJA_PYTHON", "", FALSE);
+	debug("import caja");
+	caja = PyImport_ImportModule("caja");
+	if (!caja)
+	{
+		PyErr_Print();
+		return FALSE;
+	}
+
+	/* Extract types and interfaces from caja */
+	mdict = PyModule_GetDict(caja);
+	
+	_PyGtkWidget_Type = pygobject_lookup_class(GTK_TYPE_WIDGET);
+	g_assert(_PyGtkWidget_Type != NULL);
+
+#define IMPORT(x, y) \
+    _PyCaja##x##_Type = (PyTypeObject *)PyDict_GetItemString(mdict, y); \
+	if (_PyCaja##x##_Type == NULL) { \
+		PyErr_Print(); \
+		return FALSE; \
+	}
+
+	IMPORT(Column, "Column");
+	IMPORT(ColumnProvider, "ColumnProvider");
+	IMPORT(InfoProvider, "InfoProvider");
+	IMPORT(LocationWidgetProvider, "LocationWidgetProvider");
+	IMPORT(Menu, "Menu");
+	IMPORT(MenuItem, "MenuItem");
+	IMPORT(MenuProvider, "MenuProvider");
+	IMPORT(PropertyPage, "PropertyPage");
+	IMPORT(PropertyPageProvider, "PropertyPageProvider");
+
+#undef IMPORT
+	
+	return TRUE;
+}
+
+void
+caja_module_initialize(GTypeModule *module)
+{
+	gchar *user_extensions_dir;
+	const gchar *env_string;
+
+	env_string = g_getenv("CAJA_PYTHON_DEBUG");
+	if (env_string != NULL)
+	{
+		caja_python_debug = g_parse_debug_string(env_string,
+													 caja_python_debug_keys,
+													 caja_python_ndebug_keys);
+		env_string = NULL;
+    }
+	
+	debug_enter();
+
+	all_types = g_array_new(FALSE, FALSE, sizeof(GType));
+
+	// Look in the new global path, $DATADIR/caja-python/extensions
+	caja_python_load_dir(module, DATADIR "/caja-python/extensions");
+
+	// Look in XDG_DATA_DIR, ~/.local/share/caja-python/extensions
+	user_extensions_dir = g_build_filename(g_get_user_data_dir(), 
+		"caja-python", "extensions", NULL);
+	caja_python_load_dir(module, user_extensions_dir);
+
+	// Look in the old local path, ~/.caja/python-extensions
+	user_extensions_dir = g_build_filename(g_get_home_dir(),
+		".caja", "python-extensions", NULL);
+	caja_python_load_dir(module, user_extensions_dir);
+	g_free(user_extensions_dir);
+
+	// Look in the old global path, /usr/lib(64)/caja/extensions-2.0/python
+	caja_python_load_dir(module, CAJA_EXTENSION_DIR "/python");
+}
+ 
+void
+caja_module_shutdown(void)
+{
+	debug_enter();
+
+	if (Py_IsInitialized())
+		Py_Finalize();
+
+	g_array_free(all_types, TRUE);
+}
+
+void 
+caja_module_list_types(const GType **types,
+						   int          *num_types)
+{
+	debug_enter();
+	
+	*types = (GType*)all_types->data;
+	*num_types = all_types->len;
+}