path: root/src/ephy-extensions-manager.c

/*
 *  Copyright (C) 2003 Marco Pesenti Gritti
 *  Copyright (C) 2003 Christian Persch
 *
 *  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.
 *
 *  $Id$
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include "ephy-extensions-manager.h"

#include "ephy-module-loader.h"
#include "ephy-debug.h"

#include <gmodule.h>
#include <dirent.h>

#define EPHY_EXTENSIONS_MANAGER_GET_PRIVATE(object)(G_TYPE_INSTANCE_GET_PRIVATE ((object), EPHY_TYPE_EXTENSIONS_MANAGER, EphyExtensionsManagerPrivate))

struct EphyExtensionsManagerPrivate
{
    GSList *loaders;
    GSList *extensions;
};

static GObjectClass *parent_class = NULL;

static void ephy_extensions_manager_class_init  (EphyExtensionsManagerClass *klass);
static void ephy_extensions_manager_iface_init  (EphyExtensionClass *iface);
static void ephy_extensions_manager_init    (EphyExtensionsManager *manager);

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

    if (type == 0)
    {
        static const GTypeInfo our_info =
        {
            sizeof (EphyExtensionsManagerClass),
            NULL, /* base_init */
            NULL, /* base_finalize */
            (GClassInitFunc) ephy_extensions_manager_class_init,
            NULL,
            NULL, /* class_data */
            sizeof (EphyExtensionsManager),
            0, /* n_preallocs */
            (GInstanceInitFunc) ephy_extensions_manager_init
        };

        static const GInterfaceInfo extension_info =
        {
            (GInterfaceInitFunc) ephy_extensions_manager_iface_init,
            NULL,
            NULL
        };

        type = g_type_register_static (G_TYPE_OBJECT,
                           "EphyExtensionsManager",
                           &our_info, 0);

        g_type_add_interface_static (type,
                         EPHY_TYPE_EXTENSION,
                         &extension_info);
    }

    return type;
}

static EphyExtension *
ephy_extensions_manager_instantiate_extension (EphyExtensionsManager *manager,
                           EphyModuleLoader *loader)
{
    EphyExtension *extension;

    extension = EPHY_EXTENSION (ephy_module_loader_factory (loader));

    if (EPHY_IS_EXTENSION (extension))
    {
        manager->priv->extensions =
            g_slist_append (manager->priv->extensions, extension);

        return extension;
    }

    return NULL;
}

EphyExtension *
ephy_extensions_manager_load (EphyExtensionsManager *manager,
                  const char *filename)
{
    EphyExtension *extension = NULL;

    if (g_str_has_suffix (filename, G_MODULE_SUFFIX))
    {
        EphyModuleLoader *loader;

        loader = ephy_module_loader_new (filename);

        if (loader != NULL)
        {
            manager->priv->loaders =
                g_slist_prepend (manager->priv->loaders, loader);

            extension = ephy_extensions_manager_instantiate_extension
                (manager, loader);

            g_type_module_unuse (G_TYPE_MODULE (loader));
        }
    }

    return extension;
}

static void
ephy_extensions_manager_load_dir (EphyExtensionsManager *manager,
                  const char *path)
{
    DIR *d;
    struct dirent *e;

    d = opendir (path);
    if (d == NULL)
    {
        return;
    }

    while ((e = readdir (d)) != NULL)
    {
        char *filename;

        filename = g_build_filename (path, e->d_name, NULL);

        ephy_extensions_manager_load (manager, filename);

        g_free (filename);
    }
    closedir (d);
}

EphyExtension *
ephy_extensions_manager_add (EphyExtensionsManager *manager,
                 GType type)
{
    EphyExtension *extension;

    LOG ("adding extensions of type %s", g_type_name (type))

    extension = EPHY_EXTENSION (g_object_new (type, NULL));
    if (!EPHY_IS_EXTENSION (extension))
    {
        g_object_unref (extension);

        return NULL;
    }

    manager->priv->extensions =
        g_slist_append (manager->priv->extensions, extension);

    return extension;
}

static void
ephy_extensions_manager_init (EphyExtensionsManager *manager)
{
    manager->priv = EPHY_EXTENSIONS_MANAGER_GET_PRIVATE (manager);

    LOG ("EphyExtensionsManager initialising")

    manager->priv->loaders = NULL;
    manager->priv->extensions = NULL;

    ephy_extensions_manager_load_dir (manager, EXTENSIONS_DIR);
}

static void
ephy_extensions_manager_finalize (GObject *object)
{
    EphyExtensionsManager *manager = EPHY_EXTENSIONS_MANAGER (object);

    LOG ("EphyExtensionsManager finalising")

    g_slist_foreach (manager->priv->extensions, (GFunc) g_object_unref, NULL);
    g_slist_free (manager->priv->extensions);

    g_slist_free (manager->priv->loaders);

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

static void
impl_attach_window (EphyExtension *extension,
            EphyWindow *window)
{
    EphyExtensionsManager *manager = EPHY_EXTENSIONS_MANAGER (extension);

    LOG ("multiplexing attach_window")

    g_slist_foreach (manager->priv->extensions,
             (GFunc) ephy_extension_attach_window, window);
}

static void
impl_detach_window (EphyExtension *extension,
            EphyWindow *window)
{
    EphyExtensionsManager *manager = EPHY_EXTENSIONS_MANAGER (extension);

    LOG ("multiplexing detach_window")

    g_object_ref (window);

    g_slist_foreach (manager->priv->extensions,
             (GFunc) ephy_extension_detach_window, window);

    g_object_unref (window);
}

static void
ephy_extensions_manager_iface_init (EphyExtensionClass *iface)
{
    iface->attach_window = impl_attach_window;
    iface->detach_window = impl_detach_window;
}

static void
ephy_extensions_manager_class_init (EphyExtensionsManagerClass *class)
{
    GObjectClass *object_class = G_OBJECT_CLASS (class);

    parent_class = (GObjectClass *) g_type_class_peek_parent (class);

    object_class->finalize = ephy_extensions_manager_finalize;

    g_type_class_add_private (object_class, sizeof (EphyExtensionsManagerPrivate));
}

EphyExtensionsManager *
ephy_extensions_manager_new (void)
{
    return EPHY_EXTENSIONS_MANAGER (g_object_new (EPHY_TYPE_EXTENSIONS_MANAGER, NULL));
}