backend/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 #ifdef HAVE_CONFIG_H
  22 #include "config.h"
  23 #endif
  24
  25 #include "ev-link.h"
  26
  27 enum {
  28         PROP_0,
  29         PROP_TITLE,
  30         PROP_TYPE,
  31         PROP_PAGE,
  32         PROP_URI
  33 };
  34
  35
  36 struct _EvLink {
  37         GObject base_instance;
  38         EvLinkPrivate *priv;
  39 };
  40
  41 struct _EvLinkClass {
  42         GObjectClass base_class;
  43 };
  44
  45 struct _EvLinkPrivate {
  46         char *title;
  47         char *uri;
  48         EvLinkType type;
  49         int page;
  50 };
  51
  52 G_DEFINE_TYPE (EvLink, ev_link, G_TYPE_OBJECT)
  53
  54 #define EV_LINK_GET_PRIVATE(object) \
  55         (G_TYPE_INSTANCE_GET_PRIVATE ((object), EV_TYPE_LINK, EvLinkPrivate))
  56
  57 GType
  58 ev_link_type_get_type (void)
  59 {
  60         static GType type = 0;
  61
  62         if (G_UNLIKELY (type == 0)) {
  63                 static const GEnumValue values[] = {
  64                         { EV_LINK_TYPE_TITLE, "EV_LINK_TYPE_TITLE", "title" },
  65                         { EV_LINK_TYPE_PAGE, "EV_LINK_TYPE_PAGE", "page" },
  66                         { EV_LINK_TYPE_EXTERNAL_URI, "EV_LINK_TYPE_EXTERNAL_URI", "external" },
  67                         { 0, NULL, NULL }
  68                 };
  69
  70                 type = g_enum_register_static ("EvLinkType", values);
  71         }
  72
  73         return type;
  74 }
  75
  76 const char *
  77 ev_link_get_title (EvLink *self)
  78 {
  79         g_return_val_if_fail (EV_IS_LINK (self), NULL);
  80
  81         return self->priv->title;
  82 }
  83
  84 void
  85 ev_link_set_title (EvLink* self, const char *title)
  86 {
  87         g_assert (EV_IS_LINK (self));
  88
  89         if (self->priv->title != NULL) {
  90                 g_free (self->priv->title);
  91         }
  92         if (title)
  93                 self->priv->title = g_strdup (title);
  94         else
  95                 self->priv->title = NULL;
  96
  97         g_object_notify (G_OBJECT (self), "title");
  98 }
  99
 100 const char *
 101 ev_link_get_uri (EvLink *self)
 102 {
 103         g_return_val_if_fail (EV_IS_LINK (self), NULL);
 104
 105         return self->priv->uri;
 106 }
 107
 108 void
 109 ev_link_set_uri (EvLink* self, const char *uri)
 110 {
 111         g_assert (EV_IS_LINK (self));
 112         g_assert (uri != NULL);
 113
 114         if (self->priv->uri != NULL) {
 115                 g_free (self->priv->uri);
 116         }
 117
 118         self->priv->uri = g_strdup (uri);
 119
 120         g_object_notify (G_OBJECT (self), "uri");
 121 }
 122
 123 EvLinkType
 124 ev_link_get_link_type (EvLink *self)
 125 {
 126         g_return_val_if_fail (EV_IS_LINK (self), 0);
 127
 128         return self->priv->type;
 129 }
 130
 131 void
 132 ev_link_set_link_type (EvLink* self, EvLinkType type)
 133 {
 134         g_assert (EV_IS_LINK (self));
 135
 136         self->priv->type = type;
 137
 138         g_object_notify (G_OBJECT (self), "type");
 139 }
 140
 141 int
 142 ev_link_get_page (EvLink *self)
 143 {
 144         g_return_val_if_fail (EV_IS_LINK (self), 0);
 145
 146         return self->priv->page;
 147 }
 148
 149 void
 150 ev_link_set_page (EvLink* self, int page)
 151 {
 152         g_assert (EV_IS_LINK (self));
 153
 154         self->priv->page = page;
 155
 156         g_object_notify (G_OBJECT (self), "page");
 157 }
 158
 159 static void
 160 ev_link_get_property (GObject *object, guint prop_id, GValue *value,
 161                       GParamSpec *param_spec)
 162 {
 163         EvLink *self;
 164
 165         self = EV_LINK (object);
 166
 167         switch (prop_id) {
 168         case PROP_TITLE:
 169                 g_value_set_string (value, self->priv->title);
 170                 break;
 171         case PROP_URI:
 172                 g_value_set_string (value, self->priv->uri);
 173                 break;
 174         case PROP_TYPE:
 175                 g_value_set_enum (value, self->priv->type);
 176                 break;
 177         case PROP_PAGE:
 178                 g_value_set_int (value, self->priv->page);
 179                 break;
 180         default:
 181                 G_OBJECT_WARN_INVALID_PROPERTY_ID (object,
 182                                                    prop_id,
 183                                                    param_spec);
 184                 break;
 185         }
 186 }
 187
 188 static void
 189 ev_link_set_property (GObject *object, guint prop_id, const GValue *value,
 190                       GParamSpec *param_spec)
 191 {
 192         EvLink *self;
 193
 194         self = EV_LINK (object);
 195
 196         switch (prop_id) {
 197         case PROP_TITLE:
 198                 ev_link_set_title (self, g_value_get_string (value));
 199                 break;
 200         case PROP_URI:
 201                 ev_link_set_uri (self, g_value_get_string (value));
 202                 break;
 203         case PROP_TYPE:
 204                 ev_link_set_link_type (self, g_value_get_enum (value));
 205                 break;
 206         case PROP_PAGE:
 207                 ev_link_set_page (self, g_value_get_int (value));
 208                 break;
 209         default:
 210                 G_OBJECT_WARN_INVALID_PROPERTY_ID (object,
 211                                                    prop_id,
 212                                                    param_spec);
 213                 break;
 214         }
 215 }
 216
 217 static void
 218 ev_window_dispose (GObject *object)
 219 {
 220         EvLinkPrivate *priv;
 221
 222         g_return_if_fail (EV_IS_LINK (object));
 223
 224         priv = EV_LINK (object)->priv;
 225
 226         if (priv->title) {
 227                 g_free (priv->title);
 228                 priv->title = NULL;
 229         }
 230
 231         G_OBJECT_CLASS (ev_link_parent_class)->dispose (object);
 232 }
 233
 234 static void
 235 ev_link_init (EvLink *ev_link)
 236 {
 237         ev_link->priv = EV_LINK_GET_PRIVATE (ev_link);
 238
 239         ev_link->priv->type = EV_LINK_TYPE_TITLE;
 240 }
 241
 242 static void
 243 ev_link_class_init (EvLinkClass *ev_window_class)
 244 {
 245         GObjectClass *g_object_class;
 246
 247         g_object_class = G_OBJECT_CLASS (ev_window_class);
 248         g_object_class->dispose = ev_window_dispose;
 249         g_object_class->set_property = ev_link_set_property;
 250         g_object_class->get_property = ev_link_get_property;
 251
 252         g_type_class_add_private (g_object_class, sizeof (EvLinkPrivate));
 253
 254         g_object_class_install_property (g_object_class,
 255                                          PROP_TITLE,
 256                                          g_param_spec_string ("title",
 257                                                               "Link Title",
 258                                                               "The link title",
 259                                                               NULL,
 260                                                               G_PARAM_READWRITE));
 261
 262         g_object_class_install_property (g_object_class,
 263                                          PROP_URI,
 264                                          g_param_spec_string ("uri",
 265                                                               "Link URI",
 266                                                               "The link URI",
 267                                                               NULL,
 268                                                               G_PARAM_READWRITE));
 269
 270         g_object_class_install_property (g_object_class,
 271                                          PROP_TYPE,
 272                                          g_param_spec_enum  ("type",
 273                                                              "Link Type",
 274                                                              "The link type",
 275                                                              EV_TYPE_LINK_TYPE,
 276                                                              EV_LINK_TYPE_TITLE,
 277                                                              G_PARAM_READWRITE));
 278
 279         g_object_class_install_property (g_object_class,
 280                                          PROP_PAGE,
 281                                          g_param_spec_int ("page",
 282                                                            "Link Page",
 283                                                            "The link page",
 284                                                             -1,
 285                                                             G_MAXINT,
 286                                                             0,
 287                                                             G_PARAM_READWRITE));
 288 }
 289
 290 EvLink *
 291 ev_link_new_title (const char *title)
 292 {
 293         return EV_LINK (g_object_new (EV_TYPE_LINK,
 294                                       "title", title,
 295                                       "type", EV_LINK_TYPE_TITLE,
 296                                       NULL));
 297 }
 298
 299 EvLink *
 300 ev_link_new_page (const char *title, int page)
 301 {
 302         return EV_LINK (g_object_new (EV_TYPE_LINK,
 303                                       "title", title,
 304                                       "page", page,
 305                                       "type", EV_LINK_TYPE_PAGE,
 306                                       NULL));
 307 }
 308
 309 EvLink *
 310 ev_link_new_external (const char *title, const char *uri)
 311 {
 312         return EV_LINK (g_object_new (EV_TYPE_LINK,
 313                                       "title", title,
 314                                       "uri", uri,
 315                                       "type", EV_LINK_TYPE_EXTERNAL_URI,
 316                                       NULL));
 317 }
 318
 319
 320
 321 static void
 322 ev_link_mapping_free_foreach (EvLinkMapping *mapping)
 323 {
 324         g_object_unref (G_OBJECT (mapping->link));
 325         g_free (mapping);
 326 }
 327
 328 void
 329 ev_link_mapping_free (GList *link_mapping)
 330 {
 331         if (link_mapping == NULL)
 332                 return;
 333
 334         g_list_foreach (link_mapping, (GFunc) (ev_link_mapping_free_foreach), NULL);
 335         g_list_free (link_mapping);
 336 }
 337
 338
 339 EvLink *
 340 ev_link_mapping_find (GList   *link_mapping,
 341                       gdouble  x,
 342                       gdouble  y)
 343 {
 344         GList *list;
 345         EvLink *link = NULL;
 346         int i;
 347
 348         i = 0;
 349
 350         for (list = link_mapping; list; list = list->next) {
 351                 EvLinkMapping *mapping = list->data;
 352
 353                 i++;
 354                 if ((x >= mapping->x1) &&
 355                     (y >= mapping->y1) &&
 356                     (x <= mapping->x2) &&
 357                     (y <= mapping->y2)) {
 358                         link = mapping->link;
 359                         break;
 360                 }
 361         }
 362
 363         return link;
 364 }
 365