shell/ev-history.c

   1 /*
   2  *  Copyright (C) 2005 Marco Pesenti Gritti
   3  *
   4  *  This program is free software; you can redistribute it and/or modify
   5  *  it under the terms of the GNU General Public License as published by
   6  *  the Free Software Foundation; either version 2, or (at your option)
   7  *  any later version.
   8  *
   9  *  This program is distributed in the hope that it will be useful,
  10  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  *  GNU General Public License for more details.
  13  *
  14  *  You should have received a copy of the GNU General Public License
  15  *  along with this program; if not, write to the Free Software
  16  *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  17  *
  18  */
  19
  20 #include "config.h"
  21
  22 #include <glib/gi18n.h>
  23 #include <string.h>
  24
  25 #include "ev-history.h"
  26
  27 struct _EvHistoryPrivate
  28 {
  29         GList *links;
  30 };
  31
  32 static void ev_history_init       (EvHistory *history);
  33 static void ev_history_class_init (EvHistoryClass *class);
  34
  35 G_DEFINE_TYPE (EvHistory, ev_history, G_TYPE_OBJECT)
  36
  37 #define EV_HISTORY_GET_PRIVATE(object)(G_TYPE_INSTANCE_GET_PRIVATE ((object), EV_TYPE_HISTORY, EvHistoryPrivate))
  38
  39 static void
  40 ev_history_init (EvHistory *history)
  41 {
  42         history->priv = EV_HISTORY_GET_PRIVATE (history);
  43
  44         history->priv->links = NULL;
  45 }
  46
  47 static void
  48 free_links_list (GList *l)
  49 {
  50         g_list_foreach (l, (GFunc)g_object_unref, NULL);
  51         g_list_free (l);
  52 }
  53
  54 static void
  55 ev_history_finalize (GObject *object)
  56 {
  57         EvHistory *history = EV_HISTORY (object);
  58
  59         free_links_list (history->priv->links);
  60
  61         G_OBJECT_CLASS (ev_history_parent_class)->finalize (object);
  62 }
  63
  64 static void
  65 ev_history_class_init (EvHistoryClass *class)
  66 {
  67         GObjectClass *object_class = G_OBJECT_CLASS (class);
  68
  69         object_class->finalize = ev_history_finalize;
  70
  71         g_type_class_add_private (object_class, sizeof (EvHistoryPrivate));
  72 }
  73
  74 #define HISTORY_LENGTH   7
  75
  76 void
  77 ev_history_add_link (EvHistory *history, EvLink *link)
  78 {
  79         GList *l;
  80
  81         g_return_if_fail (EV_IS_HISTORY (history));
  82         g_return_if_fail (EV_IS_LINK (link));
  83
  84         for (l = history->priv->links; l; l = l->next) {
  85                 if (!strcmp (ev_link_get_title (EV_LINK (l->data)), ev_link_get_title (link))) {
  86                         g_object_unref (G_OBJECT (l->data));
  87                         history->priv->links = g_list_delete_link (history->priv->links, l);
  88                         break;
  89                 }
  90         }
  91
  92         g_object_ref (link);
  93         history->priv->links = g_list_append (history->priv->links,
  94                                               link);
  95
  96         if (g_list_length (history->priv->links) > HISTORY_LENGTH) {
  97                 g_object_unref (G_OBJECT (history->priv->links->data));
  98                 history->priv->links = g_list_delete_link (history->priv->links,
  99                                                            history->priv->links);
 100         }
 101 }
 102
 103 EvLink *
 104 ev_history_get_link_nth (EvHistory *history, int index)
 105 {
 106         GList *l;
 107
 108         g_return_val_if_fail (EV_IS_HISTORY (history), NULL);
 109
 110         l = g_list_nth (history->priv->links, index);
 111
 112         return EV_LINK (l->data);
 113 }
 114
 115 int
 116 ev_history_get_n_links (EvHistory *history)
 117 {
 118         g_return_val_if_fail (EV_IS_HISTORY (history), -1);
 119
 120         return g_list_length (history->priv->links);
 121 }
 122
 123 EvHistory *
 124 ev_history_new (void)
 125 {
 126         return EV_HISTORY (g_object_new (EV_TYPE_HISTORY, NULL));
 127 }
 128