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