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nautilus-navigation-state.c

/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */

/* Nautilus - Nautilus navigation state
 *
 * Copyright (C) 2011 Red Hat Inc.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library 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
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public
 * License along with this library; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 *
 * Authors: Cosimo Cecchi <cosimoc@redhat.com>
 *
 */

#include <config.h>

#include "nautilus-navigation-state.h"

00030 struct _NautilusNavigationStateDetails {
      GtkActionGroup *slave;
      GtkActionGroup *master;

      GList *groups;

      gchar **action_names;
      GList *active_bindings;
};

enum {
      PROP_SLAVE = 1,
      PROP_MASTER,
      PROP_ACTION_NAMES,
      NUM_PROPERTIES,
};

static GParamSpec *properties[NUM_PROPERTIES] = { NULL, };

G_DEFINE_TYPE (NautilusNavigationState, nautilus_navigation_state, G_TYPE_OBJECT);

static void
clear_bindings (NautilusNavigationState *self)
{
      g_list_free_full (self->priv->active_bindings, g_object_unref);
      self->priv->active_bindings = NULL;
}

static void
update_bindings (NautilusNavigationState *self)
{
      gint length, idx;
      GBinding *binding;
      GtkAction *master_action, *slave_action;

      length = g_strv_length (self->priv->action_names);

      for (idx = 0; idx < length; idx++) {
            master_action = gtk_action_group_get_action (self->priv->master,
                                               self->priv->action_names[idx]);
            slave_action = gtk_action_group_get_action (self->priv->slave,
                                              self->priv->action_names[idx]);
            binding = g_object_bind_property (master_action, "sensitive",
                                      slave_action, "sensitive",
                                      G_BINDING_DEFAULT | G_BINDING_SYNC_CREATE);

            /* bind "active" too for toggle actions */
            if (GTK_IS_TOGGLE_ACTION (master_action)) {
                  binding = g_object_bind_property (master_action, "active",
                                            slave_action, "active",
                                            G_BINDING_BIDIRECTIONAL | G_BINDING_SYNC_CREATE);
            }

            self->priv->active_bindings = g_list_prepend (self->priv->active_bindings, binding);
      }
}

static void
nautilus_navigation_state_init (NautilusNavigationState *self)
{
      self->priv = G_TYPE_INSTANCE_GET_PRIVATE (self, NAUTILUS_TYPE_NAVIGATION_STATE,
                                      NautilusNavigationStateDetails);
}

static void
nautilus_navigation_state_set_property (GObject *object,
                              guint property_id,
                              const GValue *value,
                              GParamSpec *pspec)
{
      NautilusNavigationState *self = NAUTILUS_NAVIGATION_STATE (object);

      switch (property_id) {
      case PROP_SLAVE:
            self->priv->slave = g_value_dup_object (value);
            nautilus_navigation_state_add_group (self, g_value_get_object (value));
            break;
      case PROP_MASTER:
            self->priv->master = g_value_dup_object (value);
            break;
      case PROP_ACTION_NAMES:
            self->priv->action_names = g_value_dup_boxed (value);
            break;
      default:
            G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
            break;
      }
}

static void
nautilus_navigation_state_finalize (GObject *obj)
{
      NautilusNavigationState *self = NAUTILUS_NAVIGATION_STATE (obj);

      g_strfreev (self->priv->action_names);

      G_OBJECT_CLASS (nautilus_navigation_state_parent_class)->finalize (obj);      
}

static void
nautilus_navigation_state_dispose (GObject *obj)
{
      NautilusNavigationState *self = NAUTILUS_NAVIGATION_STATE (obj);

      clear_bindings (self);

      g_clear_object (&self->priv->slave);
      g_clear_object (&self->priv->master);

      if (self->priv->groups != NULL) {
            g_list_free_full (self->priv->groups, g_object_unref);
            self->priv->groups = NULL;
      }

      G_OBJECT_CLASS (nautilus_navigation_state_parent_class)->dispose (obj);
}

static void
nautilus_navigation_state_class_init (NautilusNavigationStateClass *klass)
{
      GObjectClass *oclass = G_OBJECT_CLASS (klass);

      oclass->dispose = nautilus_navigation_state_dispose;
      oclass->finalize = nautilus_navigation_state_finalize;
      oclass->set_property = nautilus_navigation_state_set_property;

      properties[PROP_SLAVE] =
            g_param_spec_object ("slave",
                             "The slave GtkActionGroup",
                             "The GtkActionGroup that will sync with the current master",
                             GTK_TYPE_ACTION_GROUP,
                             G_PARAM_CONSTRUCT_ONLY | G_PARAM_WRITABLE |
                             G_PARAM_STATIC_STRINGS);
      properties[PROP_MASTER] =
            g_param_spec_object ("master",
                             "The master GtkActionGroup",
                             "The GtkActionGroup that will be used to sync the slave",
                             GTK_TYPE_ACTION_GROUP,
                             G_PARAM_WRITABLE | G_PARAM_STATIC_STRINGS);
      properties[PROP_ACTION_NAMES] =
            g_param_spec_boxed ("action-names",
                            "The action names to sync",
                            "The action names to sync",
                            G_TYPE_STRV,
                            G_PARAM_WRITABLE | G_PARAM_STATIC_STRINGS);

      g_object_class_install_properties (oclass, NUM_PROPERTIES, properties);
      g_type_class_add_private (klass, sizeof (NautilusNavigationStateDetails));
}

NautilusNavigationState *
nautilus_navigation_state_new (GtkActionGroup *slave,
                         const gchar **action_names)
{
      return g_object_new (NAUTILUS_TYPE_NAVIGATION_STATE,
                       "slave", slave,
                       "action-names", action_names,
                       NULL);
}

void
nautilus_navigation_state_set_master (NautilusNavigationState *self,
                              GtkActionGroup *master)
{
      if (self->priv->master != master) {
            clear_bindings (self);

            g_clear_object (&self->priv->master);
            self->priv->master = g_object_ref (master);

            update_bindings (self);

            g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_MASTER]);
      }
}

void
nautilus_navigation_state_add_group (NautilusNavigationState *self,
                             GtkActionGroup *group)
{
      self->priv->groups = g_list_prepend (self->priv->groups, g_object_ref (group));
}

void
nautilus_navigation_state_sync_all (NautilusNavigationState *self)
{
      GList *l;
      gint length, idx;
      const gchar *action_name;
      GtkAction *action;
      gboolean master_value;
      GtkActionGroup *group;

      length = g_strv_length (self->priv->action_names);

      for (idx = 0; idx < length; idx++) {
            action_name = self->priv->action_names[idx];
            action = gtk_action_group_get_action (self->priv->master,
                                          action_name);

            master_value = gtk_action_get_sensitive (action);

            for (l = self->priv->groups; l != NULL; l = l->next) {
                  group = l->data;

                  action = gtk_action_group_get_action (group, action_name);
                  gtk_action_set_sensitive (action, master_value);
            }
      }
}

GtkActionGroup *
nautilus_navigation_state_get_master (NautilusNavigationState *self)
{
      return self->priv->master;
}

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