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Diffstat (limited to 'libdocument/ev-module.c')
| -rw-r--r-- | libdocument/ev-module.c | 190 |
1 files changed, 190 insertions, 0 deletions
diff --git a/libdocument/ev-module.c b/libdocument/ev-module.c new file mode 100644 index 0000000..f2aebe7 --- /dev/null +++ b/libdocument/ev-module.c @@ -0,0 +1,190 @@ +/* + * ev-module.c + * This file is part of Evince + * + * Copyright (C) 2005 - Paolo Maggi + * + * 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. + */ + +/* This is a modified version of ephy-module.c from Epiphany source code. + * Here the original copyright assignment: + * + * Copyright (C) 2003 Marco Pesenti Gritti + * Copyright (C) 2003, 2004 Christian Persch + * + */ + +/* + * Modified by the gedit Team, 2005. See the AUTHORS file for a + * list of people on the gedit Team. + * See the ChangeLog files for a list of changes. + * + * $Id: gedit-module.c 5367 2006-12-17 14:29:49Z pborelli $ + */ + +/* Modified by evince team */ + +#include "config.h" + +#include "ev-module.h" + +#include <gmodule.h> + +typedef struct _EvModuleClass EvModuleClass; + +struct _EvModuleClass { + GTypeModuleClass parent_class; +}; + +struct _EvModule { + GTypeModule parent_instance; + + GModule *library; + + gchar *path; + GType type; +}; + +typedef GType (*EvModuleRegisterFunc) (GTypeModule *); + +static void ev_module_init (EvModule *action); +static void ev_module_class_init (EvModuleClass *class); + +G_DEFINE_TYPE (EvModule, ev_module, G_TYPE_TYPE_MODULE) + +static gboolean +ev_module_load (GTypeModule *gmodule) +{ + EvModule *module = EV_MODULE (gmodule); + EvModuleRegisterFunc register_func; + + module->library = g_module_open (module->path, 0); + + if (!module->library) { + g_warning (g_module_error ()); + + return FALSE; + } + + /* extract symbols from the lib */ + if (!g_module_symbol (module->library, "register_evince_backend", + (void *) ®ister_func)) { + g_warning (g_module_error ()); + g_module_close (module->library); + + return FALSE; + } + + /* symbol can still be NULL even though g_module_symbol + * returned TRUE */ + if (!register_func) { + g_warning ("Symbol 'register_evince_backend' should not be NULL"); + g_module_close (module->library); + + return FALSE; + } + + module->type = register_func (gmodule); + + if (module->type == 0) { + g_warning ("Invalid evince backend contained by module %s", module->path); + + return FALSE; + } + + return TRUE; +} + +static void +ev_module_unload (GTypeModule *gmodule) +{ + EvModule *module = EV_MODULE (gmodule); + + g_module_close (module->library); + + module->library = NULL; + module->type = 0; +} + +const gchar * +ev_module_get_path (EvModule *module) +{ + g_return_val_if_fail (EV_IS_MODULE (module), NULL); + + return module->path; +} + +GObject * +ev_module_new_object (EvModule *module) +{ + g_return_val_if_fail (EV_IS_MODULE (module), NULL); + + if (module->type == 0) + return NULL; + + return g_object_new (module->type, NULL); +} + +GType +ev_module_get_object_type (EvModule *module) +{ + g_return_val_if_fail (EV_IS_MODULE (module), 0); + + return module->type; +} + +static void +ev_module_init (EvModule *module) +{ +} + +static void +ev_module_finalize (GObject *object) +{ + EvModule *module = EV_MODULE (object); + + g_free (module->path); + + G_OBJECT_CLASS (ev_module_parent_class)->finalize (object); +} + +static void +ev_module_class_init (EvModuleClass *class) +{ + GObjectClass *object_class = G_OBJECT_CLASS (class); + GTypeModuleClass *module_class = G_TYPE_MODULE_CLASS (class); + + object_class->finalize = ev_module_finalize; + + module_class->load = ev_module_load; + module_class->unload = ev_module_unload; +} + +EvModule * +ev_module_new (const gchar *path) +{ + EvModule *result; + + g_return_val_if_fail (path != NULL && path[0] != '\0', NULL); + + result = g_object_new (EV_TYPE_MODULE, NULL); + + g_type_module_set_name (G_TYPE_MODULE (result), path); + result->path = g_strdup (path); + + return result; +} |