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
  24 #include "ev-history.h"
  25
  26 struct _EvHistoryPrivate
  27 {
  28         GList *links;
  29         int current_index;
  30 };
  31
  32 enum {
  33         PROP_0,
  34         PROP_INDEX
  35 };
  36
  37 static void ev_history_init       (EvHistory *history);
  38 static void ev_history_class_init (EvHistoryClass *class);
  39
  40 static GObjectClass *parent_class = NULL;
  41
  42 G_DEFINE_TYPE (EvHistory, ev_history, G_TYPE_OBJECT)
  43
  44 #define EV_HISTORY_GET_PRIVATE(object)(G_TYPE_INSTANCE_GET_PRIVATE ((object), EV_TYPE_HISTORY, EvHistoryPrivate))
  45
  46 static void
  47 ev_history_init (EvHistory *history)
  48 {
  49         history->priv = EV_HISTORY_GET_PRIVATE (history);
  50
  51         history->priv->links = NULL;
  52         history->priv->current_index = -1;
  53 }
  54
  55 static void
  56 free_links_list (GList *l)
  57 {
  58         g_list_foreach (l, (GFunc)g_object_unref, NULL);
  59         g_list_free (l);
  60 }
  61
  62 static void
  63 ev_history_finalize (GObject *object)
  64 {
  65         EvHistory *history = EV_HISTORY (object);
  66
  67         free_links_list (history->priv->links);
  68
  69         parent_class->finalize (object);
  70 }
  71
  72 static void
  73 ev_history_get_property (GObject *object, guint prop_id, GValue *value,
  74                          GParamSpec *param_spec)
  75 {
  76         EvHistory *self;
  77
  78         self = EV_HISTORY (object);
  79
  80         switch (prop_id) {
  81         case PROP_INDEX:
  82                 g_value_set_int (value, self->priv->current_index);
  83                 break;
  84         default:
  85                 G_OBJECT_WARN_INVALID_PROPERTY_ID (object,
  86                                                    prop_id,
  87                                                    param_spec);
  88                 break;
  89         }
  90 }
  91
  92 static void
  93 ev_history_set_property (GObject *object, guint prop_id, const GValue *value,
  94                          GParamSpec *param_spec)
  95 {
  96         EvHistory *self;
  97
  98         self = EV_HISTORY (object);
  99
 100         switch (prop_id) {
 101         case PROP_INDEX:
 102                 ev_history_set_current_index (self, g_value_get_int (value));
 103                 break;
 104         default:
 105                 G_OBJECT_WARN_INVALID_PROPERTY_ID (object,
 106                                                    prop_id,
 107                                                    param_spec);
 108                 break;
 109         }
 110 }
 111
 112 static void
 113 ev_history_class_init (EvHistoryClass *class)
 114 {
 115         GObjectClass *object_class = G_OBJECT_CLASS (class);
 116
 117         object_class->finalize = ev_history_finalize;
 118         object_class->set_property = ev_history_set_property;
 119         object_class->get_property = ev_history_get_property;
 120
 121         parent_class = g_type_class_peek_parent (class);
 122
 123         g_object_class_install_property (object_class,
 124                                          PROP_INDEX,
 125                                          g_param_spec_int ("index",
 126                                                            "Current Index",
 127                                                            "The current index",
 128                                                             -1,
 129                                                             G_MAXINT,
 130                                                             0,
 131                                                             G_PARAM_READWRITE));
 132
 133         g_type_class_add_private (object_class, sizeof (EvHistoryPrivate));
 134 }
 135
 136 void
 137 ev_history_add_link (EvHistory *history, EvLink *link)
 138 {
 139         int length;
 140
 141         g_return_if_fail (EV_IS_HISTORY (history));
 142         g_return_if_fail (EV_IS_LINK (link));
 143
 144         length = g_list_length (history->priv->links);
 145         if (history->priv->current_index < length - 1) {
 146                 GList *l = g_list_nth (history->priv->links,
 147                                        history->priv->current_index + 1);
 148
 149                 if (l->prev) {
 150                         l->prev->next = NULL;
 151                         free_links_list (l);
 152                 } else {
 153                         free_links_list (history->priv->links);
 154                         history->priv->links = NULL;
 155                 }
 156         }
 157
 158         g_object_ref (link);
 159         history->priv->links = g_list_append (history->priv->links,
 160                                               link);
 161
 162         length = g_list_length (history->priv->links);
 163         history->priv->current_index = length - 1;
 164 }
 165
 166 void
 167 ev_history_add_page (EvHistory *history, int page)
 168 {
 169         EvLink *link;
 170         EvLinkDest *dest;
 171         EvLinkAction *action;
 172         gchar *title;
 173
 174         g_return_if_fail (EV_IS_HISTORY (history));
 175         title = g_strdup_printf (_("Page: %d"), page);
 176
 177         dest = ev_link_dest_new_page (page);
 178         action = ev_link_action_new_dest (dest);
 179         link = ev_link_new (title, action);
 180         g_free (title);
 181
 182         ev_history_add_link (history, link);
 183 }
 184
 185 EvLink *
 186 ev_history_get_link_nth (EvHistory *history, int index)
 187 {
 188         GList *l;
 189
 190         g_return_val_if_fail (EV_IS_HISTORY (history), NULL);
 191
 192         l = g_list_nth (history->priv->links, index);
 193
 194         return EV_LINK (l->data);
 195 }
 196
 197 int
 198 ev_history_get_n_links (EvHistory *history)
 199 {
 200         g_return_val_if_fail (EV_IS_HISTORY (history), -1);
 201
 202         return g_list_length (history->priv->links);
 203 }
 204
 205 int
 206 ev_history_get_current_index (EvHistory *history)
 207 {
 208         g_return_val_if_fail (EV_IS_HISTORY (history), -1);
 209
 210         return history->priv->current_index;
 211 }
 212
 213 void
 214 ev_history_set_current_index (EvHistory *history, int index)
 215 {
 216         g_return_if_fail (EV_IS_HISTORY (history));
 217
 218         history->priv->current_index = index;
 219
 220         g_object_notify (G_OBJECT (history), "index");
 221 }
 222
 223 EvHistory *
 224 ev_history_new (void)
 225 {
 226         return EV_HISTORY (g_object_new (EV_TYPE_HISTORY, NULL));
 227 }