libdocument/ev-link.c

   1 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8; c-indent-level: 8 -*- */
   2 /* this file is part of evince, a gnome document viewer
   3  *
   4  *  Copyright (C) 2005 Red Hat, Inc.
   5  *
   6  * Evince is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * Evince is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
  19  */
  20
  21 #include "ev-link.h"
  22
  23 enum {
  24         PROP_0,
  25         PROP_TITLE,
  26         PROP_ACTION
  27 };
  28
  29 struct _EvLink {
  30         GObject base_instance;
  31         EvLinkPrivate *priv;
  32 };
  33
  34 struct _EvLinkClass {
  35         GObjectClass base_class;
  36 };
  37
  38 struct _EvLinkPrivate {
  39         gchar        *title;
  40         EvLinkAction *action;
  41 };
  42
  43 G_DEFINE_TYPE (EvLink, ev_link, G_TYPE_OBJECT)
  44
  45 #define EV_LINK_GET_PRIVATE(object) \
  46         (G_TYPE_INSTANCE_GET_PRIVATE ((object), EV_TYPE_LINK, EvLinkPrivate))
  47
  48 const gchar *
  49 ev_link_get_title (EvLink *self)
  50 {
  51         g_return_val_if_fail (EV_IS_LINK (self), NULL);
  52
  53         return self->priv->title;
  54 }
  55
  56 EvLinkAction *
  57 ev_link_get_action (EvLink *self)
  58 {
  59         g_return_val_if_fail (EV_IS_LINK (self), NULL);
  60
  61         return self->priv->action;
  62 }
  63
  64 static void
  65 ev_link_get_property (GObject    *object,
  66                       guint       prop_id,
  67                       GValue     *value,
  68                       GParamSpec *param_spec)
  69 {
  70         EvLink *self;
  71
  72         self = EV_LINK (object);
  73
  74         switch (prop_id) {
  75                 case PROP_TITLE:
  76                         g_value_set_string (value, self->priv->title);
  77                         break;
  78                 case PROP_ACTION:
  79                         g_value_set_pointer (value, self->priv->action);
  80                         break;
  81                 default:
  82                         G_OBJECT_WARN_INVALID_PROPERTY_ID (object,
  83                                                            prop_id,
  84                                                            param_spec);
  85                         break;
  86         }
  87 }
  88
  89 static void
  90 ev_link_set_property (GObject      *object,
  91                       guint         prop_id,
  92                       const GValue *value,
  93                       GParamSpec   *param_spec)
  94 {
  95         EvLink *self = EV_LINK (object);
  96
  97         switch (prop_id) {
  98                 case PROP_TITLE:
  99                         self->priv->title = g_value_dup_string (value);
 100                         break;
 101                 case PROP_ACTION:
 102                         self->priv->action = g_value_get_pointer (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_link_finalize (GObject *object)
 114 {
 115         EvLinkPrivate *priv;
 116
 117         priv = EV_LINK (object)->priv;
 118
 119         if (priv->title) {
 120                 g_free (priv->title);
 121                 priv->title = NULL;
 122         }
 123
 124         if (priv->action) {
 125                 g_object_unref (priv->action);
 126                 priv->action = NULL;
 127         }
 128
 129         G_OBJECT_CLASS (ev_link_parent_class)->finalize (object);
 130 }
 131
 132 static void
 133 ev_link_init (EvLink *ev_link)
 134 {
 135         ev_link->priv = EV_LINK_GET_PRIVATE (ev_link);
 136
 137         ev_link->priv->title = NULL;
 138         ev_link->priv->action = NULL;
 139 }
 140
 141 static void
 142 ev_link_class_init (EvLinkClass *ev_window_class)
 143 {
 144         GObjectClass *g_object_class;
 145
 146         g_object_class = G_OBJECT_CLASS (ev_window_class);
 147
 148         g_object_class->set_property = ev_link_set_property;
 149         g_object_class->get_property = ev_link_get_property;
 150
 151         g_object_class->finalize = ev_link_finalize;
 152
 153         g_type_class_add_private (g_object_class, sizeof (EvLinkPrivate));
 154
 155         g_object_class_install_property (g_object_class,
 156                                          PROP_TITLE,
 157                                          g_param_spec_string ("title",
 158                                                               "Link Title",
 159                                                               "The link title",
 160                                                               NULL,
 161                                                               G_PARAM_READWRITE |
 162                                                               G_PARAM_CONSTRUCT_ONLY));
 163         g_object_class_install_property (g_object_class,
 164                                          PROP_ACTION,
 165                                          g_param_spec_pointer ("action",
 166                                                                "Link Action",
 167                                                                "The link action",
 168                                                                G_PARAM_READWRITE |
 169                                                                G_PARAM_CONSTRUCT_ONLY));
 170 }
 171
 172 EvLink *
 173 ev_link_new (const char   *title,
 174              EvLinkAction *action)
 175 {
 176         return EV_LINK (g_object_new (EV_TYPE_LINK,
 177                                       "title", title,
 178                                       "action", action,
 179                                       NULL));
 180 }
 181
 182 /* Link Mapping stuff */
 183 static void
 184 ev_link_mapping_free_foreach (EvLinkMapping *mapping)
 185 {
 186         g_object_unref (G_OBJECT (mapping->link));
 187         g_free (mapping);
 188 }
 189
 190 void
 191 ev_link_mapping_free (GList *link_mapping)
 192 {
 193         if (link_mapping == NULL)
 194                 return;
 195
 196         g_list_foreach (link_mapping, (GFunc) (ev_link_mapping_free_foreach), NULL);
 197         g_list_free (link_mapping);
 198 }
 199
 200 EvLink *
 201 ev_link_mapping_find (GList   *link_mapping,
 202                       gdouble  x,
 203                       gdouble  y)
 204 {
 205         GList *list;
 206         EvLink *link = NULL;
 207         int i;
 208
 209         i = 0;
 210
 211         for (list = link_mapping; list; list = list->next) {
 212                 EvLinkMapping *mapping = list->data;
 213
 214                 i++;
 215                 if ((x >= mapping->x1) &&
 216                     (y >= mapping->y1) &&
 217                     (x <= mapping->x2) &&
 218                     (y <= mapping->y2)) {
 219                         link = mapping->link;
 220                         break;
 221                 }
 222         }
 223
 224         return link;
 225 }
 226
 227 gint
 228 ev_link_get_page (EvLink *link)
 229 {
 230         EvLinkAction *action;
 231         EvLinkDest *dest;
 232
 233         action = ev_link_get_action (link);
 234         if (!action)
 235                 return -1;
 236
 237         if (ev_link_action_get_action_type (action) !=
 238             EV_LINK_ACTION_TYPE_GOTO_DEST)
 239                 return -1;
 240
 241         dest = ev_link_action_get_dest (action);
 242         if (dest)
 243                 return ev_link_dest_get_page (dest);
 244
 245         return -1;
 246 }