path: root/src/ephy-plugin.c

/*
 *  Copyright (C) 2003 Marco Pesenti Gritti
 *
 *  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 "ephy-plugin.h"
#include "ephy-file-helpers.h"

#include <gmodule.h>

typedef struct _EphyPluginClass EphyPluginClass;

struct _EphyPluginClass
{
    GTypeModuleClass parent_class;
};

struct _EphyPlugin
{
    GTypeModule parent_instance;

    GModule *library;

    void (*init) (GTypeModule *);
    void (*exit) (void);

    char *name;
};

static void ephy_plugin_init       (EphyPlugin *action);
static void ephy_plugin_class_init (EphyPluginClass *class);
static void ephy_plugin_finalize   (GObject *object);

static GObjectClass *parent_class = NULL;

GType
ephy_plugin_get_type (void)
{
    static GType type = 0;

    if (!type)
    {
        static const GTypeInfo type_info =
        {
            sizeof (EphyPluginClass),
            (GBaseInitFunc) NULL,
            (GBaseFinalizeFunc) NULL,
            (GClassInitFunc) ephy_plugin_class_init,
            (GClassFinalizeFunc) NULL,
            NULL,
            sizeof (EphyPlugin),
            0, /* n_preallocs */
            (GInstanceInitFunc) ephy_plugin_init,
        };

        type = g_type_register_static (G_TYPE_TYPE_MODULE,
                           "EphyPlugin",
                           &type_info, 0);
    }
    return type;
}

EphyPlugin *
ephy_plugin_new (const char *name)
{
    EphyPlugin *result;

    result = g_object_new (EPHY_TYPE_PLUGIN, NULL);

    g_type_module_set_name (G_TYPE_MODULE (result), name);
    result->name = g_strdup (name);

    if (!g_type_module_use (G_TYPE_MODULE (result)))
    {
        return NULL;
    }

    return result;
}

static gboolean
ephy_plugin_load (GTypeModule *module)
{
    EphyPlugin *plugin = EPHY_PLUGIN (module);
    char *module_path;

    module_path = g_strdup (plugin->name);

    if (!module_path)
    {
        g_warning ("Unable to locate theme engine in module_path: \"%s\",",
               plugin->name);
        return FALSE;
    }

    plugin->library = g_module_open (module_path, 0);
    g_free (module_path);

    if (!plugin->library)
    {
        g_warning (g_module_error());
        return FALSE;
    }

    /* extract symbols from the lib */
    if (!g_module_symbol (plugin->library, "plugin_init",
        (gpointer *)&plugin->init) ||
            !g_module_symbol (plugin->library, "plugin_exit",
        (gpointer *)&plugin->exit))
    {
        g_warning (g_module_error());
        g_module_close (plugin->library);

        return FALSE;
    }

    plugin->init (module);

    return TRUE;
}

static void
ephy_plugin_unload (GTypeModule *module)
{
    EphyPlugin *plugin = EPHY_PLUGIN (module);

    plugin->exit();

    g_module_close (plugin->library);

    plugin->library = NULL;
    plugin->init = NULL;
    plugin->exit = NULL;
}

static void
ephy_plugin_class_init (EphyPluginClass *class)
{
    GTypeModuleClass *plugin_class;
    GObjectClass *object_class = G_OBJECT_CLASS (class);

    object_class->finalize = ephy_plugin_finalize;

    parent_class = g_type_class_peek_parent (class);
    plugin_class = G_TYPE_MODULE_CLASS (class);

    plugin_class->load = ephy_plugin_load;
    plugin_class->unload = ephy_plugin_unload;
}

static void
ephy_plugin_init (EphyPlugin *action)
{
}

static void
ephy_plugin_finalize (GObject *object)
{
    g_return_if_fail (EPHY_IS_PLUGIN (object));

    G_OBJECT_CLASS (parent_class)->finalize (object);
}