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         PROP_LEFT,
  34         PROP_TOP,
  35         PROP_ZOOM
  36 };
  37
  38
  39 struct _EvLink {
  40         GObject base_instance;
  41         EvLinkPrivate *priv;
  42 };
  43
  44 struct _EvLinkClass {
  45         GObjectClass base_class;
  46 };
  47
  48 struct _EvLinkPrivate {
  49         char *title;
  50         char *uri;
  51         EvLinkType type;
  52         int page;
  53         double top;
  54         double left;
  55         double zoom;
  56 };
  57
  58 G_DEFINE_TYPE (EvLink, ev_link, G_TYPE_OBJECT)
  59
  60 #define EV_LINK_GET_PRIVATE(object) \
  61         (G_TYPE_INSTANCE_GET_PRIVATE ((object), EV_TYPE_LINK, EvLinkPrivate))
  62
  63 GType
  64 ev_link_type_get_type (void)
  65 {
  66         static GType type = 0;
  67
  68         if (G_UNLIKELY (type == 0)) {
  69                 static const GEnumValue values[] = {
  70                         { EV_LINK_TYPE_TITLE, "EV_LINK_TYPE_TITLE", "title" },
  71                         { EV_LINK_TYPE_PAGE, "EV_LINK_TYPE_PAGE", "page" },
  72                         { EV_LINK_TYPE_PAGE_XYZ, "EV_LINK_TYPE_PAGE_XYZ", "page-xyz" },
  73                         { EV_LINK_TYPE_EXTERNAL_URI, "EV_LINK_TYPE_EXTERNAL_URI", "external" },
  74                         { 0, NULL, NULL }
  75                 };
  76
  77                 type = g_enum_register_static ("EvLinkType", values);
  78         }
  79
  80         return type;
  81 }
  82
  83 const char *
  84 ev_link_get_title (EvLink *self)
  85 {
  86         g_return_val_if_fail (EV_IS_LINK (self), NULL);
  87
  88         return self->priv->title;
  89 }
  90
  91 const char *
  92 ev_link_get_uri (EvLink *self)
  93 {
  94         g_return_val_if_fail (EV_IS_LINK (self), NULL);
  95
  96         return self->priv->uri;
  97 }
  98
  99 EvLinkType
 100 ev_link_get_link_type (EvLink *self)
 101 {
 102         g_return_val_if_fail (EV_IS_LINK (self), 0);
 103
 104         return self->priv->type;
 105 }
 106
 107 int
 108 ev_link_get_page (EvLink *self)
 109 {
 110         g_return_val_if_fail (EV_IS_LINK (self), 0);
 111
 112         return self->priv->page;
 113 }
 114
 115 double
 116 ev_link_get_top (EvLink *self)
 117 {
 118         g_return_val_if_fail (EV_IS_LINK (self), 0);
 119
 120         return self->priv->top;
 121 }
 122
 123 double
 124 ev_link_get_left (EvLink *self)
 125 {
 126         g_return_val_if_fail (EV_IS_LINK (self), 0);
 127
 128         return self->priv->left;
 129 }
 130
 131 double
 132 ev_link_get_zoom (EvLink *self)
 133 {
 134         g_return_val_if_fail (EV_IS_LINK (self), 0);
 135
 136         return self->priv->zoom;
 137 }
 138
 139 static void
 140 ev_link_get_property (GObject *object, guint prop_id, GValue *value,
 141                       GParamSpec *param_spec)
 142 {
 143         EvLink *self;
 144
 145         self = EV_LINK (object);
 146
 147         switch (prop_id) {
 148         case PROP_TITLE:
 149                 g_value_set_string (value, self->priv->title);
 150                 break;
 151         case PROP_URI:
 152                 g_value_set_string (value, self->priv->uri);
 153                 break;
 154         case PROP_TYPE:
 155                 g_value_set_enum (value, self->priv->type);
 156                 break;
 157         case PROP_PAGE:
 158                 g_value_set_int (value, self->priv->page);
 159                 break;
 160         case PROP_TOP:
 161                 g_value_set_double (value, self->priv->top);
 162                 break;
 163         case PROP_LEFT:
 164                 g_value_set_double (value, self->priv->left);
 165                 break;
 166         case PROP_ZOOM:
 167                 g_value_set_double (value, self->priv->zoom);
 168                 break;
 169         default:
 170                 G_OBJECT_WARN_INVALID_PROPERTY_ID (object,
 171                                                    prop_id,
 172                                                    param_spec);
 173                 break;
 174         }
 175 }
 176
 177 static void
 178 ev_link_set_property (GObject *object, guint prop_id, const GValue *value,
 179                       GParamSpec *param_spec)
 180 {
 181         EvLink *link = EV_LINK (object);
 182
 183         switch (prop_id) {
 184         case PROP_TITLE:
 185                 link->priv->title = g_strdup (g_value_get_string (value));
 186                 break;
 187         case PROP_URI:
 188                 link->priv->uri = g_strdup (g_value_get_string (value));
 189                 break;
 190         case PROP_TYPE:
 191                 link->priv->type = g_value_get_enum (value);
 192                 break;
 193         case PROP_PAGE:
 194                 link->priv->page = g_value_get_int (value);
 195                 break;
 196         case PROP_TOP:
 197                 link->priv->top = g_value_get_double (value);
 198                 break;
 199         case PROP_LEFT:
 200                 link->priv->left = g_value_get_double (value);
 201                 break;
 202         case PROP_ZOOM:
 203                 link->priv->zoom = g_value_get_double (value);
 204                 break;
 205
 206         default:
 207                 G_OBJECT_WARN_INVALID_PROPERTY_ID (object,
 208                                                    prop_id,
 209                                                    param_spec);
 210                 break;
 211         }
 212 }
 213
 214 static void
 215 ev_window_dispose (GObject *object)
 216 {
 217         EvLinkPrivate *priv;
 218
 219         g_return_if_fail (EV_IS_LINK (object));
 220
 221         priv = EV_LINK (object)->priv;
 222
 223         if (priv->title) {
 224                 g_free (priv->title);
 225                 priv->title = NULL;
 226         }
 227
 228         if (priv->uri) {
 229                 g_free (priv->uri);
 230                 priv->uri = NULL;
 231         }
 232
 233         G_OBJECT_CLASS (ev_link_parent_class)->dispose (object);
 234 }
 235
 236 static void
 237 ev_link_init (EvLink *ev_link)
 238 {
 239         ev_link->priv = EV_LINK_GET_PRIVATE (ev_link);
 240
 241         ev_link->priv->type = EV_LINK_TYPE_TITLE;
 242 }
 243
 244 static void
 245 ev_link_class_init (EvLinkClass *ev_window_class)
 246 {
 247         GObjectClass *g_object_class;
 248
 249         g_object_class = G_OBJECT_CLASS (ev_window_class);
 250         g_object_class->dispose = ev_window_dispose;
 251         g_object_class->set_property = ev_link_set_property;
 252         g_object_class->get_property = ev_link_get_property;
 253
 254         g_type_class_add_private (g_object_class, sizeof (EvLinkPrivate));
 255
 256         g_object_class_install_property (g_object_class,
 257                                          PROP_TITLE,
 258                                          g_param_spec_string ("title",
 259                                                               "Link Title",
 260                                                               "The link title",
 261                                                               NULL,
 262                                                               G_PARAM_READWRITE |
 263                                                               G_PARAM_CONSTRUCT_ONLY));
 264         g_object_class_install_property (g_object_class,
 265                                          PROP_URI,
 266                                          g_param_spec_string ("uri",
 267                                                               "Link URI",
 268                                                               "The link URI",
 269                                                               NULL,
 270                                                               G_PARAM_READWRITE |
 271                                                               G_PARAM_CONSTRUCT_ONLY));
 272         g_object_class_install_property (g_object_class,
 273                                          PROP_TYPE,
 274                                          g_param_spec_enum  ("type",
 275                                                              "Link Type",
 276                                                              "The link type",
 277                                                              EV_TYPE_LINK_TYPE,
 278                                                              EV_LINK_TYPE_TITLE,
 279                                                              G_PARAM_READWRITE |
 280                                                              G_PARAM_CONSTRUCT_ONLY));
 281         g_object_class_install_property (g_object_class,
 282                                          PROP_PAGE,
 283                                          g_param_spec_int ("page",
 284                                                            "Link Page",
 285                                                            "The link page",
 286                                                             -1,
 287                                                             G_MAXINT,
 288                                                             0,
 289                                                             G_PARAM_READWRITE |
 290                                                             G_PARAM_CONSTRUCT_ONLY));
 291         g_object_class_install_property (g_object_class,
 292                                          PROP_LEFT,
 293                                          g_param_spec_double ("left",
 294                                                               "Left coordinate",
 295                                                               "The left coordinate",
 296                                                               0,
 297                                                               G_MAXDOUBLE,
 298                                                               0,
 299                                                               G_PARAM_READWRITE |
 300                                                               G_PARAM_CONSTRUCT_ONLY));
 301         g_object_class_install_property (g_object_class,
 302                                          PROP_TOP,
 303                                          g_param_spec_double ("top",
 304                                                               "Top coordinate",
 305                                                               "The top coordinate",
 306                                                               0,
 307                                                               G_MAXDOUBLE,
 308                                                               0,
 309                                                               G_PARAM_READWRITE |
 310                                                               G_PARAM_CONSTRUCT_ONLY));
 311         g_object_class_install_property (g_object_class,
 312                                          PROP_ZOOM,
 313                                          g_param_spec_double ("zoom",
 314                                                               "Zoom",
 315                                                               "Zoom",
 316                                                               0,
 317                                                               G_MAXDOUBLE,
 318                                                               0,
 319                                                               G_PARAM_READWRITE |
 320                                                               G_PARAM_CONSTRUCT_ONLY));
 321 }
 322
 323 EvLink *
 324 ev_link_new_title (const char *title)
 325 {
 326         return EV_LINK (g_object_new (EV_TYPE_LINK,
 327                                       "title", title,
 328                                       "type", EV_LINK_TYPE_TITLE,
 329                                       NULL));
 330 }
 331
 332 EvLink *
 333 ev_link_new_page (const char *title, int page)
 334 {
 335         return EV_LINK (g_object_new (EV_TYPE_LINK,
 336                                       "title", title,
 337                                       "page", page,
 338                                       "type", EV_LINK_TYPE_PAGE,
 339                                       NULL));
 340 }
 341
 342 EvLink *
 343 ev_link_new_page_xyz (const char *title,
 344                       int         page,
 345                       double      left,
 346                       double      top,
 347                       double      zoom)
 348 {
 349         return EV_LINK (g_object_new (EV_TYPE_LINK,
 350                                       "title", title,
 351                                       "page", page,
 352                                       "type", EV_LINK_TYPE_PAGE_XYZ,
 353                                       "left", left,
 354                                       "top", top,
 355                                       "zoom", zoom,
 356                                       NULL));
 357 }
 358
 359 EvLink *
 360 ev_link_new_external (const char *title, const char *uri)
 361 {
 362         return EV_LINK (g_object_new (EV_TYPE_LINK,
 363                                       "title", title,
 364                                       "uri", uri,
 365                                       "type", EV_LINK_TYPE_EXTERNAL_URI,
 366                                       NULL));
 367 }
 368
 369
 370
 371 static void
 372 ev_link_mapping_free_foreach (EvLinkMapping *mapping)
 373 {
 374         g_object_unref (G_OBJECT (mapping->link));
 375         g_free (mapping);
 376 }
 377
 378 void
 379 ev_link_mapping_free (GList *link_mapping)
 380 {
 381         if (link_mapping == NULL)
 382                 return;
 383
 384         g_list_foreach (link_mapping, (GFunc) (ev_link_mapping_free_foreach), NULL);
 385         g_list_free (link_mapping);
 386 }
 387
 388
 389 EvLink *
 390 ev_link_mapping_find (GList   *link_mapping,
 391                       gdouble  x,
 392                       gdouble  y)
 393 {
 394         GList *list;
 395         EvLink *link = NULL;
 396         int i;
 397
 398         i = 0;
 399
 400         for (list = link_mapping; list; list = list->next) {
 401                 EvLinkMapping *mapping = list->data;
 402
 403                 i++;
 404                 if ((x >= mapping->x1) &&
 405                     (y >= mapping->y1) &&
 406                     (x <= mapping->x2) &&
 407                     (y <= mapping->y2)) {
 408                         link = mapping->link;
 409                         break;
 410                 }
 411         }
 412
 413         return link;
 414 }
 415