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https://gitlab.gnome.org/GNOME/evince
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196 lines
4.7 KiB
C
196 lines
4.7 KiB
C
/*
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* ev-module.c
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* This file is part of Evince
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*
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* Copyright (C) 2005 - Paolo Maggi
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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/* This is a modified version of ephy-module.c from Epiphany source code.
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* Here the original copyright assignment:
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*
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* Copyright (C) 2003 Marco Pesenti Gritti
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* Copyright (C) 2003, 2004 Christian Persch
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*
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*/
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/*
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* Modified by the gedit Team, 2005. See the AUTHORS file for a
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* list of people on the gedit Team.
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* See the ChangeLog files for a list of changes.
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*
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* $Id: gedit-module.c 5367 2006-12-17 14:29:49Z pborelli $
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*/
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/* Modified by evince team */
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#include "config.h"
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#include "ev-module.h"
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#include <gmodule.h>
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typedef struct _EvModuleClass EvModuleClass;
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struct _EvModuleClass {
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GTypeModuleClass parent_class;
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};
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struct _EvModule {
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GTypeModule parent_instance;
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GModule *library;
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gboolean resident;
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gchar *path;
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GType type;
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};
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typedef GType (*EvModuleRegisterFunc) (GTypeModule *);
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static void ev_module_init (EvModule *action);
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static void ev_module_class_init (EvModuleClass *class);
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#define ev_module_get_type _ev_module_get_type
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G_DEFINE_TYPE (EvModule, ev_module, G_TYPE_TYPE_MODULE)
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static gboolean
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ev_module_load (GTypeModule *gmodule)
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{
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EvModule *module = EV_MODULE (gmodule);
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EvModuleRegisterFunc register_func;
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module->library = g_module_open (module->path, 0);
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if (!module->library) {
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g_warning ("%s", g_module_error ());
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return FALSE;
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}
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/* extract symbols from the lib */
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if (!g_module_symbol (module->library, "register_evince_backend",
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(void *) ®ister_func)) {
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g_warning ("%s", g_module_error ());
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g_module_close (module->library);
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return FALSE;
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}
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/* symbol can still be NULL even though g_module_symbol
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* returned TRUE */
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if (!register_func) {
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g_warning ("Symbol 'register_evince_backend' should not be NULL");
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g_module_close (module->library);
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return FALSE;
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}
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module->type = register_func (gmodule);
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if (module->type == 0) {
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g_warning ("Invalid evince backend contained by module %s", module->path);
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return FALSE;
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}
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if (module->resident)
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g_module_make_resident (module->library);
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return TRUE;
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}
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static void
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ev_module_unload (GTypeModule *gmodule)
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{
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EvModule *module = EV_MODULE (gmodule);
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g_module_close (module->library);
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module->library = NULL;
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}
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const gchar *
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_ev_module_get_path (EvModule *module)
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{
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g_return_val_if_fail (EV_IS_MODULE (module), NULL);
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return module->path;
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}
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GObject *
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_ev_module_new_object (EvModule *module)
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{
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g_return_val_if_fail (EV_IS_MODULE (module), NULL);
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if (module->type == 0)
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return NULL;
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return g_object_new (module->type, NULL);
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}
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GType
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_ev_module_get_object_type (EvModule *module)
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{
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g_return_val_if_fail (EV_IS_MODULE (module), 0);
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return module->type;
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}
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static void
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ev_module_init (EvModule *module)
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{
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}
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static void
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ev_module_finalize (GObject *object)
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{
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EvModule *module = EV_MODULE (object);
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g_free (module->path);
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G_OBJECT_CLASS (ev_module_parent_class)->finalize (object);
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}
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static void
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ev_module_class_init (EvModuleClass *class)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (class);
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GTypeModuleClass *module_class = G_TYPE_MODULE_CLASS (class);
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object_class->finalize = ev_module_finalize;
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module_class->load = ev_module_load;
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module_class->unload = ev_module_unload;
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}
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EvModule *
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_ev_module_new (const gchar *path,
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gboolean resident)
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{
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EvModule *result;
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g_return_val_if_fail (path != NULL && path[0] != '\0', NULL);
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result = g_object_new (EV_TYPE_MODULE, NULL);
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g_type_module_set_name (G_TYPE_MODULE (result), path);
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result->path = g_strdup (path);
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result->resident = resident;
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return result;
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}
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