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/*
 *  Copyright © 2005 Peter Harvey
 *
 *  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-related-action.h"

#include "ephy-window.h"
#include "ephy-bookmarks.h"
#include "ephy-shell.h"
#include "ephy-node-common.h"
#include "ephy-stock-icons.h"

#include <gtk/gtk.h>
#include <gtk/gtkaction.h>
#include <gtk/gtkactiongroup.h>
#include <glib/gi18n.h>

static void
node_changed (EphyNode *node,
          guint propertyid,
          EphyTopicAction *action)
{
    ephy_topic_action_updated (action);
}

static void
node_destroyed (EphyNode *node,
        EphyTopicAction *action)
{
    EphyBookmarks *eb;
    EphyNode *favorites;

    eb = ephy_shell_get_bookmarks (ephy_shell_get_default ());
    favorites = ephy_bookmarks_get_favorites (eb);

    ephy_topic_action_set_topic (action, favorites);
}

static EphyEmbed *
open_link (EphyLink *link,
       const char *address,
       EphyEmbed *embed,
       EphyLinkFlags flags)
{
    EphyBookmarks *eb;
    EphyNode *bookmark;
    EphyNode *topic, *chosen = NULL;
    GPtrArray *topics;
    gint i, tmp, best = 0;
    
    eb = ephy_shell_get_bookmarks (ephy_shell_get_default ());
    bookmark = ephy_bookmarks_find_bookmark (eb, address);
    if (bookmark == NULL) return NULL;

    topic = ephy_topic_action_get_topic (EPHY_TOPIC_ACTION (link));
    tmp = ephy_node_get_property_int (topic, EPHY_NODE_KEYWORD_PROP_PRIORITY);                
    if (tmp == EPHY_NODE_NORMAL_PRIORITY &&
        ephy_node_has_child (topic, bookmark))
    {
        return NULL;
    }                
    ephy_node_signal_disconnect_object (topic, EPHY_NODE_CHANGED,
                        (EphyNodeCallback) node_changed,
                        G_OBJECT (link));
    ephy_node_signal_disconnect_object (topic, EPHY_NODE_DESTROY,
                        (EphyNodeCallback) node_destroyed,
                        G_OBJECT (link));

    topics = ephy_node_get_children (ephy_bookmarks_get_keywords (eb));                
    for (i = 0; i < topics->len; i++)
    {
        topic = g_ptr_array_index (topics, i);
        tmp = ephy_node_get_property_int (topic, EPHY_NODE_KEYWORD_PROP_PRIORITY);
        if (tmp == EPHY_NODE_NORMAL_PRIORITY &&
            ephy_node_has_child (topic, bookmark))
        {
            tmp = ephy_node_get_n_children (topic);
            if (chosen == NULL ||
                (tmp >= 10 && tmp <= best))
            {
                chosen = topic;
                best = tmp;
            }
        }
    }

    if (chosen == NULL) chosen = ephy_bookmarks_get_favorites (eb);

    ephy_topic_action_set_topic (EPHY_TOPIC_ACTION (link), chosen);
    ephy_node_signal_connect_object (chosen, EPHY_NODE_CHANGED,
                     (EphyNodeCallback) node_changed,
                     G_OBJECT (link));
    ephy_node_signal_connect_object (chosen, EPHY_NODE_DESTROY,
                     (EphyNodeCallback) node_destroyed,
                     G_OBJECT (link));

    return NULL;
}

static void
iface_init (EphyLinkIface *iface)
{
    iface->open_link = open_link;
}

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

    if (G_UNLIKELY (type == 0))
    {
        const GTypeInfo our_info =
        {
            sizeof (EphyRelatedActionClass),
            NULL, /* base_init */
            NULL, /* base_finalize */
            NULL, /* class_init */
            NULL,
            NULL, /* class_data */
            sizeof (EphyRelatedAction),
            0,   /* n_preallocs */
            NULL /* instance_init */
        };
        const GInterfaceInfo link_info = 
        {
            (GInterfaceInitFunc) iface_init,
            NULL,
            NULL
        };

        type = g_type_register_static (EPHY_TYPE_TOPIC_ACTION,
                           "EphyRelatedAction",
                           &our_info, 0);
        g_type_add_interface_static (type,
                         EPHY_TYPE_LINK,
                         &link_info);
    }

    return type;
}

GtkAction *
ephy_related_action_new (EphyLink *link,
             GtkUIManager *manager,
             char * name)
{
    EphyBookmarks *eb;
    EphyNode *favorites;
    EphyRelatedAction *action;
 
    eb = ephy_shell_get_bookmarks (ephy_shell);
    favorites = ephy_bookmarks_get_favorites (eb);

    action = (EphyRelatedAction *) (g_object_new (EPHY_TYPE_RELATED_ACTION,
                              "name", name,
                              "topic", favorites,
                              "short_label", _("Related"),
                              "stock-id", GTK_STOCK_INDEX,
                              "manager", manager,
                              NULL));
    
    g_signal_connect_object (link, "open-link",
                 G_CALLBACK (ephy_link_open), action,
                 G_CONNECT_SWAPPED);
    
    return (GtkAction *) action;
}