path: root/src/ephy-lockdown.c

/*
 *  Copyright © 2000, 2001, 2002, 2003, 2004 Marco Pesenti Gritti
 *  Copyright © 2003, 2004, 2005 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 *  $Id$
 */

#include "config.h"

#include "ephy-lockdown.h"
#include "ephy-extension.h"
#include "ephy-action-helper.h"
#include "ephy-toolbar.h"
#include "ephy-prefs.h"
#include "eel-gconf-extensions.h"
#include "ephy-debug.h"

#include <gtk/gtkactiongroup.h>
#include <gtk/gtkuimanager.h>

#include <string.h>

/* Make sure these don't overlap with those in ephy-window.c and ephy-toolbar.c */
enum
{
    LOCKDOWN_FLAG = 1 << 31
};

static const char * const keys [] =
{
    CONF_LOCKDOWN_DISABLE_ARBITRARY_URL,
    CONF_LOCKDOWN_DISABLE_BOOKMARK_EDITING,
    CONF_LOCKDOWN_DISABLE_COMMAND_LINE,
    CONF_LOCKDOWN_DISABLE_HISTORY,
    CONF_LOCKDOWN_DISABLE_PRINTING,
    CONF_LOCKDOWN_DISABLE_PRINT_SETUP,
    CONF_LOCKDOWN_DISABLE_SAVE_TO_DISK,
    CONF_LOCKDOWN_DISABLE_TOOLBAR_EDITING,
    CONF_LOCKDOWN_FULLSCREEN
};

#define EPHY_LOCKDOWN_GET_PRIVATE(object)(G_TYPE_INSTANCE_GET_PRIVATE ((object), EPHY_TYPE_LOCKDOWN, EphyLockdownPrivate))

struct _EphyLockdownPrivate
{
    guint notifier_id[G_N_ELEMENTS (keys)];
    GList *windows;
};

static GObjectClass *parent_class = NULL;

static int
find_name (GtkActionGroup *action_group,
       const char *name)
{
    return strcmp (gtk_action_group_get_name (action_group), name);
}

static GtkActionGroup *
find_action_group (GtkUIManager *manager,
           const char *name)
{
    GList *list, *element;

    list = gtk_ui_manager_get_action_groups (manager);
    element = g_list_find_custom (list, name, (GCompareFunc) find_name);
    g_return_val_if_fail (element != NULL, NULL);

    return GTK_ACTION_GROUP (element->data);
}

static void
update_location_editable (EphyWindow *window,
              GtkAction *action,
              gboolean editable)
{
    EphyTab *tab;
    EphyEmbed *embed;
    GtkWidget *toolbar;
    char *address;

    g_object_set (action, "editable", editable, NULL);

    /* Restore the real web page address when disabling entry */
    if (editable == FALSE)
    {
        toolbar = ephy_window_get_toolbar (window);
        tab = ephy_window_get_active_tab (window);
        /* embed is NULL on startup */
        if (tab != NULL)
        {
            embed = ephy_tab_get_embed (tab);
            g_return_if_fail (embed != NULL);

            address = ephy_embed_get_location (embed, TRUE);
            ephy_toolbar_set_location (EPHY_TOOLBAR (toolbar), address, NULL);
            ephy_tab_set_typed_address (tab, NULL,
                            EPHY_TAB_ADDRESS_EXPIRE_CURRENT);
            g_free (address);
        }
    }
}

/* NOTE: If you bring more actions under lockdown control, make sure
 * that all sensitivity updates on them are done using the helpers!
 */
static void
update_window (EphyWindow *window,
           EphyLockdown *lockdown)
{
    GtkUIManager *manager;
    GtkActionGroup *action_group, *popups_action_group, *toolbar_action_group;
    GtkAction *action;
    gboolean disabled, fullscreen, print_setup_disabled, writable;

    LOG ("Updating window %p", window);

    manager = GTK_UI_MANAGER (ephy_window_get_ui_manager (window));
    action_group = find_action_group (manager, "WindowActions");
    popups_action_group = find_action_group (manager, "PopupsActions");
    toolbar_action_group = find_action_group (manager, "SpecialToolbarActions");
    g_return_if_fail (action_group != NULL && popups_action_group != NULL && toolbar_action_group != NULL);

    disabled = eel_gconf_get_boolean (CONF_LOCKDOWN_DISABLE_PRINTING);
    print_setup_disabled = eel_gconf_get_boolean (CONF_LOCKDOWN_DISABLE_PRINT_SETUP) ||
                   eel_gconf_get_boolean (CONF_LOCKDOWN_DISABLE_COMMAND_LINE);
    action = gtk_action_group_get_action (action_group, "FilePrintSetup");
    ephy_action_change_sensitivity_flags (action, LOCKDOWN_FLAG, disabled || print_setup_disabled);
    action = gtk_action_group_get_action (action_group, "FilePrintPreview");
    ephy_action_change_sensitivity_flags (action, LOCKDOWN_FLAG, disabled);
    action = gtk_action_group_get_action (action_group, "FilePrint");
    ephy_action_change_sensitivity_flags (action, LOCKDOWN_FLAG, disabled);

    writable = eel_gconf_key_is_writable (CONF_WINDOWS_SHOW_TOOLBARS);
    action = gtk_action_group_get_action (action_group, "ViewToolbar");
    ephy_action_change_sensitivity_flags (action, LOCKDOWN_FLAG, !writable);

    writable = eel_gconf_key_is_writable (CONF_WINDOWS_SHOW_STATUSBAR);
    action = gtk_action_group_get_action (action_group, "ViewStatusbar");
    ephy_action_change_sensitivity_flags (action, LOCKDOWN_FLAG, !writable);

    disabled = eel_gconf_get_boolean (CONF_LOCKDOWN_DISABLE_ARBITRARY_URL);
    action = gtk_action_group_get_action (action_group, "GoLocation");
    ephy_action_change_sensitivity_flags (action, LOCKDOWN_FLAG, disabled);
    action = gtk_action_group_get_action (toolbar_action_group, "Location");
    update_location_editable (window, action, !disabled);
    action = gtk_action_group_get_action (toolbar_action_group, "NavigationUp");
    ephy_action_change_sensitivity_flags (action, LOCKDOWN_FLAG, disabled);

    disabled = eel_gconf_get_boolean (CONF_LOCKDOWN_DISABLE_HISTORY);
    action = gtk_action_group_get_action (action_group, "GoHistory");
    ephy_action_change_sensitivity_flags (action, LOCKDOWN_FLAG, disabled);
    action = gtk_action_group_get_action (toolbar_action_group, "NavigationBack");
    ephy_action_change_sensitivity_flags (action, LOCKDOWN_FLAG, disabled);
    action = gtk_action_group_get_action (toolbar_action_group, "NavigationForward");
    ephy_action_change_sensitivity_flags (action, LOCKDOWN_FLAG, disabled);

    disabled = eel_gconf_get_boolean (CONF_LOCKDOWN_DISABLE_BOOKMARK_EDITING);
    action = gtk_action_group_get_action (action_group, "GoBookmarks");
    ephy_action_change_sensitivity_flags (action, LOCKDOWN_FLAG, disabled);
    action = gtk_action_group_get_action (action_group, "FileBookmarkPage");
    ephy_action_change_sensitivity_flags (action, LOCKDOWN_FLAG, disabled);
    action = gtk_action_group_get_action (popups_action_group, "ContextBookmarkPage");
    ephy_action_change_sensitivity_flags (action, LOCKDOWN_FLAG, disabled);
    action = gtk_action_group_get_action (popups_action_group, "BookmarkLink");
    ephy_action_change_sensitivity_flags (action, LOCKDOWN_FLAG, disabled);

    disabled = eel_gconf_get_boolean (CONF_LOCKDOWN_DISABLE_SAVE_TO_DISK);
    action = gtk_action_group_get_action (action_group, "FileSaveAs");
    ephy_action_change_sensitivity_flags (action, LOCKDOWN_FLAG, disabled);
    action = gtk_action_group_get_action (popups_action_group, "DownloadLink");
    ephy_action_change_sensitivity_flags (action, LOCKDOWN_FLAG, disabled);
    action = gtk_action_group_get_action (popups_action_group, "DownloadLinkAs");
    ephy_action_change_sensitivity_flags (action, LOCKDOWN_FLAG, disabled);
    action = gtk_action_group_get_action (popups_action_group, "SaveImageAs");
    ephy_action_change_sensitivity_flags (action, LOCKDOWN_FLAG, disabled);
    action = gtk_action_group_get_action (popups_action_group, "OpenImage");
    ephy_action_change_sensitivity_flags (action, LOCKDOWN_FLAG, disabled);
    writable = eel_gconf_key_is_writable (CONF_DESKTOP_BG_PICTURE);
    action = gtk_action_group_get_action (popups_action_group, "SetImageAsBackground");
    ephy_action_change_sensitivity_flags (action, LOCKDOWN_FLAG, disabled || !writable);

    disabled = eel_gconf_get_boolean (CONF_LOCKDOWN_DISABLE_TOOLBAR_EDITING);
    action = gtk_action_group_get_action (action_group, "ViewToolbarEditor");
    ephy_action_change_sensitivity_flags (action, LOCKDOWN_FLAG, disabled);

    fullscreen = eel_gconf_get_boolean (CONF_LOCKDOWN_FULLSCREEN);
    action = gtk_action_group_get_action (toolbar_action_group, "FileNewWindow");
    ephy_action_change_sensitivity_flags (action, LOCKDOWN_FLAG, fullscreen);
    action = gtk_action_group_get_action (action_group, "ViewFullscreen");
    ephy_action_change_sensitivity_flags (action, LOCKDOWN_FLAG, fullscreen);

    if (fullscreen)
    {
        gtk_window_fullscreen (GTK_WINDOW (window));
    }
}

static void
notifier (GConfClient *client,
      guint cnxn_id,
      GConfEntry *entry,
      EphyLockdown *lockdown)
{
    EphyLockdownPrivate *priv = lockdown->priv;

    LOG ("Key %s changed", entry->key);

    g_list_foreach (priv->windows, (GFunc) update_window, lockdown);
}

static void
ephy_lockdown_init (EphyLockdown *lockdown)
{
    EphyLockdownPrivate *priv;
    guint i;

    lockdown->priv = priv = EPHY_LOCKDOWN_GET_PRIVATE (lockdown);

    LOG ("EphyLockdown initialising");

    for (i = 0; i < G_N_ELEMENTS (keys); i++)
    {
        priv->notifier_id[i] =eel_gconf_notification_add
            (keys[i], (GConfClientNotifyFunc) notifier, lockdown);
    }
    /* We know that no windows are open yet,
     * so we don't need to do notify here.
     */

    eel_gconf_monitor_add ("/apps/epiphany/lockdown");
    eel_gconf_monitor_add ("/desktop/gnome/lockdown");
}

static void
ephy_lockdown_finalize (GObject *object)
{
    EphyLockdown *lockdown = EPHY_LOCKDOWN (object);
    EphyLockdownPrivate *priv = lockdown->priv;
    guint i;

    LOG ("EphyLockdown finalising");

    eel_gconf_monitor_remove ("/apps/epiphany/lockdown");
    eel_gconf_monitor_remove ("/desktop/gnome/lockdown");

    for (i = 0; i < G_N_ELEMENTS (keys); i++)
    {
        eel_gconf_notification_remove (priv->notifier_id[i]);
    }

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

static void
impl_attach_window (EphyExtension *extension,
            EphyWindow *window)
{
    EphyLockdown *lockdown = EPHY_LOCKDOWN (extension);
    EphyLockdownPrivate *priv = lockdown->priv;

    priv->windows = g_list_prepend (priv->windows, window);

    update_window (window, lockdown);
}

static void
impl_detach_window (EphyExtension *extension,
            EphyWindow *window)
{
    EphyLockdown *lockdown = EPHY_LOCKDOWN (extension);
    EphyLockdownPrivate *priv = lockdown->priv;

    priv->windows = g_list_remove (priv->windows, window);

    /* Since we know that the window closes now, we don't have to
     * undo anything.
     */
}

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

static void
ephy_lockdown_class_init (EphyLockdownClass *klass)
{
    GObjectClass *object_class = G_OBJECT_CLASS (klass);

    parent_class = (GObjectClass *) g_type_class_peek_parent (klass);

    object_class->finalize = ephy_lockdown_finalize;

    g_type_class_add_private (object_class, sizeof (EphyLockdownPrivate));
}

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

    if (G_UNLIKELY (type == 0))
    {
        const GTypeInfo our_info =
        {
            sizeof (EphyLockdownClass),
            NULL, /* base_init */
            NULL, /* base_finalize */
            (GClassInitFunc) ephy_lockdown_class_init,
            NULL,
            NULL, /* class_data */
            sizeof (EphyLockdown),
            0, /* n_preallocs */
            (GInstanceInitFunc) ephy_lockdown_init
        };
        const GInterfaceInfo extension_info =
        {
            (GInterfaceInitFunc) ephy_lockdown_iface_init,
            NULL,
            NULL
        };

        type = g_type_register_static (G_TYPE_OBJECT,
                           "EphyLockdown",
                           &our_info, 0);
        g_type_add_interface_static (type,
                         EPHY_TYPE_EXTENSION,
                         &extension_info);
    }

    return type;
}