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/*
* 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., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, 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;
gboolean resident;
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 ("%s", g_module_error ());
return FALSE;
}
/* extract symbols from the lib */
if (!g_module_symbol (module->library, "register_evince_backend",
(void *) ®ister_func)) {
g_warning ("%s", 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;
}
if (module->resident)
g_module_make_resident (module->library);
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,
gboolean resident)
{
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);
result->resident = resident;
return result;
}
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