shell/ev-sidebar-links.c

   1 /* this file is part of evince, a gnome document viewer
   2  *
   3  *  Copyright (C) 2004 Red Hat, Inc.
   4  *
   5  *  Author:
   6  *    Jonathan Blandford <jrb@alum.mit.edu>
   7  *
   8  * Evince is free software; you can redistribute it and/or modify it
   9  * under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * Evince is distributed in the hope that it will be useful, but
  14  * WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
  21  */
  22
  23 #ifdef HAVE_CONFIG_H
  24 #include "config.h"
  25 #endif
  26
  27 #include <string.h>
  28 #include <glib/gi18n.h>
  29 #include <gtk/gtk.h>
  30
  31 #include "ev-sidebar-page.h"
  32 #include "ev-sidebar-links.h"
  33 #include "ev-job-queue.h"
  34 #include "ev-document-links.h"
  35 #include "ev-window.h"
  36 #include "ev-gui.h"
  37
  38 struct _EvSidebarLinksPrivate {
  39         GtkWidget *tree_view;
  40
  41         /* Keep these ids around for blocking */
  42         guint selection_id;
  43         guint page_changed_id;
  44         guint row_activated_id;
  45
  46         EvJob *job;
  47         GtkTreeModel *model;
  48         EvDocument *document;
  49         EvPageCache *page_cache;
  50 };
  51
  52 enum {
  53         PROP_0,
  54         PROP_MODEL,
  55 };
  56
  57
  58 static void links_page_num_func                         (GtkTreeViewColumn *tree_column,
  59                                                          GtkCellRenderer   *cell,
  60                                                          GtkTreeModel      *tree_model,
  61                                                          GtkTreeIter       *iter,
  62                                                          EvSidebarLinks    *sidebar_links);
  63 static void update_page_callback                        (EvPageCache       *page_cache,
  64                                                          gint               current_page,
  65                                                          EvSidebarLinks    *sidebar_links);
  66 static void row_activated_callback                      (GtkTreeView *treeview,
  67                                                          GtkTreePath *arg1,
  68                                                          GtkTreeViewColumn *arg2,
  69                                                          gpointer user_data);
  70 static void job_finished_callback                       (EvJobLinks     *job,
  71                                                          EvSidebarLinks *sidebar_links);
  72 static void ev_sidebar_links_page_iface_init            (EvSidebarPageIface *iface);
  73 static void ev_sidebar_links_set_document               (EvSidebarPage  *sidebar_page,
  74                                                          EvDocument     *document);
  75 static gboolean ev_sidebar_links_support_document       (EvSidebarPage  *sidebar_page,
  76                                                          EvDocument     *document);
  77 static const gchar* ev_sidebar_links_get_label          (EvSidebarPage *sidebar_page);
  78
  79
  80 G_DEFINE_TYPE_EXTENDED (EvSidebarLinks,
  81                         ev_sidebar_links,
  82                         GTK_TYPE_VBOX,
  83                         0,
  84                         G_IMPLEMENT_INTERFACE (EV_TYPE_SIDEBAR_PAGE,
  85                                                ev_sidebar_links_page_iface_init))
  86
  87
  88 #define EV_SIDEBAR_LINKS_GET_PRIVATE(object) \
  89         (G_TYPE_INSTANCE_GET_PRIVATE ((object), EV_TYPE_SIDEBAR_LINKS, EvSidebarLinksPrivate))
  90
  91 static void
  92 ev_sidebar_links_set_property (GObject      *object,
  93                                guint         prop_id,
  94                                const GValue *value,
  95                                GParamSpec   *pspec)
  96 {
  97         EvSidebarLinks *ev_sidebar_links;
  98         GtkTreeModel *model;
  99
 100         ev_sidebar_links = EV_SIDEBAR_LINKS (object);
 101
 102         switch (prop_id)
 103         {
 104         case PROP_MODEL:
 105                 model = ev_sidebar_links->priv->model;
 106                 ev_sidebar_links->priv->model = GTK_TREE_MODEL (g_value_dup_object (value));
 107                 if (model)
 108                         g_object_unref (model);
 109                 break;
 110         default:
 111                 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 112                 break;
 113         }
 114 }
 115
 116 static void
 117 ev_sidebar_links_get_property (GObject    *object,
 118                                guint       prop_id,
 119                                GValue     *value,
 120                                GParamSpec *pspec)
 121 {
 122         EvSidebarLinks *ev_sidebar_links;
 123
 124         ev_sidebar_links = EV_SIDEBAR_LINKS (object);
 125
 126         switch (prop_id)
 127         {
 128         case PROP_MODEL:
 129                 g_value_set_object (value, ev_sidebar_links->priv->model);
 130                 break;
 131         default:
 132                 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 133                 break;
 134         }
 135 }
 136
 137 static void
 138 ev_sidebar_links_dispose (GObject *object)
 139 {
 140         EvSidebarLinks *sidebar = EV_SIDEBAR_LINKS (object);
 141
 142         if (sidebar->priv->document) {
 143                 g_object_unref (sidebar->priv->document);
 144                 sidebar->priv->document = NULL;
 145                 sidebar->priv->page_cache = NULL;
 146         }
 147
 148         if (sidebar->priv->job) {
 149                 g_signal_handlers_disconnect_by_func (sidebar->priv->job,
 150                                                       job_finished_callback, sidebar);
 151                 ev_job_queue_remove_job (sidebar->priv->job);
 152                 g_object_unref (sidebar->priv->job);
 153                 sidebar->priv->job = NULL;
 154         }
 155
 156         G_OBJECT_CLASS (ev_sidebar_links_parent_class)->dispose (object);
 157 }
 158
 159 static void
 160 ev_sidebar_links_class_init (EvSidebarLinksClass *ev_sidebar_links_class)
 161 {
 162         GObjectClass *g_object_class;
 163
 164         g_object_class = G_OBJECT_CLASS (ev_sidebar_links_class);
 165
 166         g_object_class->set_property = ev_sidebar_links_set_property;
 167         g_object_class->get_property = ev_sidebar_links_get_property;
 168         g_object_class->dispose = ev_sidebar_links_dispose;
 169
 170         g_object_class_install_property (g_object_class,
 171                                          PROP_MODEL,
 172                                          g_param_spec_object ("model",
 173                                                               "Model",
 174                                                               "Current Model",
 175                                                               GTK_TYPE_TREE_MODEL,
 176                                                               G_PARAM_READWRITE));
 177
 178         g_type_class_add_private (g_object_class, sizeof (EvSidebarLinksPrivate));
 179 }
 180
 181 static void
 182 selection_changed_callback (GtkTreeSelection   *selection,
 183                             EvSidebarLinks     *ev_sidebar_links)
 184 {
 185         EvDocument *document;
 186         GtkTreeModel *model;
 187         GtkTreeIter iter;
 188
 189         g_return_if_fail (EV_IS_SIDEBAR_LINKS (ev_sidebar_links));
 190
 191         document = EV_DOCUMENT (ev_sidebar_links->priv->document);
 192         g_return_if_fail (ev_sidebar_links->priv->document != NULL);
 193
 194         if (gtk_tree_selection_get_selected (selection, &model, &iter)) {
 195                 EvLink *link;
 196
 197                 gtk_tree_model_get (model, &iter,
 198                                     EV_DOCUMENT_LINKS_COLUMN_LINK, &link,
 199                                     -1);
 200
 201                 if (link == NULL)
 202                         return;
 203
 204                 g_signal_handler_block (ev_sidebar_links->priv->page_cache,
 205                                         ev_sidebar_links->priv->page_changed_id);
 206                 /* FIXME: we should handle this better.  This breaks w/ URLs */
 207                 ev_page_cache_set_link (ev_sidebar_links->priv->page_cache, link);
 208                 g_signal_handler_unblock (ev_sidebar_links->priv->page_cache,
 209                                           ev_sidebar_links->priv->page_changed_id);
 210         }
 211 }
 212
 213 static GtkTreeModel *
 214 create_loading_model (void)
 215 {
 216         GtkTreeModel *retval;
 217         GtkTreeIter iter;
 218         gchar *markup;
 219
 220         /* Creates a fake model to indicate that we're loading */
 221         retval = (GtkTreeModel *)gtk_list_store_new (EV_DOCUMENT_LINKS_COLUMN_NUM_COLUMNS,
 222                                                      G_TYPE_STRING,
 223                                                      G_TYPE_OBJECT);
 224
 225         gtk_list_store_append (GTK_LIST_STORE (retval), &iter);
 226         markup = g_strdup_printf ("<span size=\"larger\" style=\"italic\">%s</span>", _("Loading..."));
 227         gtk_list_store_set (GTK_LIST_STORE (retval), &iter,
 228                             EV_DOCUMENT_LINKS_COLUMN_MARKUP, markup,
 229                             EV_DOCUMENT_LINKS_COLUMN_LINK, NULL,
 230                             -1);
 231         g_free (markup);
 232
 233         return retval;
 234 }
 235
 236 static void
 237 print_section_cb (GtkWidget *menuitem, EvSidebarLinks *sidebar)
 238 {
 239         GtkWidget *window;
 240         GtkTreeSelection *selection;
 241         GtkTreeModel *model;
 242         GtkTreeIter iter;
 243
 244         selection = gtk_tree_view_get_selection
 245                 (GTK_TREE_VIEW (sidebar->priv->tree_view));
 246
 247         if (gtk_tree_selection_get_selected (selection, &model, &iter)) {
 248                 EvLink *link;
 249                 int first_page, last_page;
 250
 251                 gtk_tree_model_get (model, &iter,
 252                                     EV_DOCUMENT_LINKS_COLUMN_LINK, &link,
 253                                     -1);
 254                 first_page = ev_link_get_page (link) + 1;
 255
 256                 if (gtk_tree_model_iter_next (model, &iter)) {
 257                         gtk_tree_model_get (model, &iter,
 258                                             EV_DOCUMENT_LINKS_COLUMN_LINK, &link,
 259                                             -1);
 260                         last_page = ev_link_get_page (link);
 261                 } else {
 262                         last_page = -1;
 263                 }
 264
 265                 window = gtk_widget_get_toplevel (GTK_WIDGET (sidebar));
 266                 if (EV_IS_WINDOW (window)) {
 267                         ev_window_print_range (EV_WINDOW (window),
 268                                                first_page, last_page);
 269                 }
 270         }
 271 }
 272
 273 static GtkMenu *
 274 build_popup_menu (EvSidebarLinks *sidebar)
 275 {
 276         GtkWidget *menu;
 277         GtkWidget *item;
 278
 279         menu = gtk_menu_new ();
 280         item = gtk_image_menu_item_new_from_stock (GTK_STOCK_PRINT, NULL);
 281         gtk_label_set_label (GTK_LABEL (GTK_BIN (item)->child), _("Print..."));
 282         gtk_widget_show (item);
 283         gtk_menu_shell_append (GTK_MENU_SHELL (menu), item);
 284         g_signal_connect (item, "activate",
 285                           G_CALLBACK (print_section_cb), sidebar);
 286
 287         return GTK_MENU (menu);
 288 }
 289
 290 static void
 291 popup_menu_cb (GtkWidget *treeview, EvSidebarLinks *sidebar)
 292 {
 293         GtkMenu *menu = build_popup_menu (sidebar);
 294
 295         gtk_menu_popup (menu, NULL, NULL,
 296                         ev_gui_menu_position_tree_selection,
 297                         sidebar->priv->tree_view, 0,
 298                         gtk_get_current_event_time ());
 299         gtk_menu_shell_select_first (GTK_MENU_SHELL (menu), FALSE);
 300 }
 301
 302 static gboolean
 303 button_press_cb (GtkWidget *treeview,
 304                  GdkEventButton *event,
 305                  EvSidebarLinks *sidebar)
 306 {
 307         GtkTreePath *path = NULL;
 308
 309         if (event->button == 3) {
 310                 if (gtk_tree_view_get_path_at_pos (GTK_TREE_VIEW (treeview),
 311                                                    event->x,
 312                                                    event->y,
 313                                                    &path,
 314                                                    NULL, NULL, NULL)) {
 315                         gtk_tree_view_set_cursor (GTK_TREE_VIEW (treeview),
 316                                                   path, NULL, FALSE);
 317                         gtk_menu_popup (build_popup_menu (sidebar), NULL,
 318                                         NULL, NULL, NULL, event->button,
 319                                         gtk_get_current_event_time ());
 320                         gtk_tree_path_free (path);
 321
 322                         return TRUE;
 323                 }
 324         }
 325
 326         return FALSE;
 327 }
 328
 329
 330 static void
 331 ev_sidebar_links_construct (EvSidebarLinks *ev_sidebar_links)
 332 {
 333         EvSidebarLinksPrivate *priv;
 334         GtkWidget *swindow;
 335         GtkTreeViewColumn *column;
 336         GtkCellRenderer *renderer;
 337         GtkTreeSelection *selection;
 338         GtkTreeModel *loading_model;
 339
 340         priv = ev_sidebar_links->priv;
 341
 342         swindow = gtk_scrolled_window_new (NULL, NULL);
 343
 344         gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (swindow),
 345                                         GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);
 346         gtk_scrolled_window_set_shadow_type (GTK_SCROLLED_WINDOW (swindow),
 347                                              GTK_SHADOW_IN);
 348
 349         /* Create tree view */
 350         loading_model = create_loading_model ();
 351         priv->tree_view = gtk_tree_view_new_with_model (loading_model);
 352         g_object_unref (loading_model);
 353
 354         selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (priv->tree_view));
 355         gtk_tree_selection_set_mode (selection, GTK_SELECTION_NONE);
 356         gtk_tree_view_set_headers_visible (GTK_TREE_VIEW (priv->tree_view), FALSE);
 357         gtk_container_add (GTK_CONTAINER (swindow), priv->tree_view);
 358
 359         gtk_box_pack_start (GTK_BOX (ev_sidebar_links), swindow, TRUE, TRUE, 0);
 360         gtk_widget_show_all (GTK_WIDGET (ev_sidebar_links));
 361
 362         column = gtk_tree_view_column_new ();
 363         gtk_tree_view_column_set_expand (GTK_TREE_VIEW_COLUMN (column), TRUE);
 364         gtk_tree_view_append_column (GTK_TREE_VIEW (priv->tree_view), column);
 365
 366         renderer = (GtkCellRenderer*)
 367                 g_object_new (GTK_TYPE_CELL_RENDERER_TEXT,
 368                               "ellipsize", PANGO_ELLIPSIZE_END,
 369                               NULL);
 370         gtk_tree_view_column_pack_start (GTK_TREE_VIEW_COLUMN (column), renderer, TRUE);
 371         gtk_tree_view_column_set_attributes (GTK_TREE_VIEW_COLUMN (column), renderer,
 372                                              "markup", EV_DOCUMENT_LINKS_COLUMN_MARKUP,
 373                                              NULL);
 374
 375
 376         renderer = gtk_cell_renderer_text_new ();
 377         gtk_tree_view_column_pack_end (GTK_TREE_VIEW_COLUMN (column), renderer, FALSE);
 378         gtk_tree_view_column_set_cell_data_func (GTK_TREE_VIEW_COLUMN (column), renderer,
 379                                                  (GtkTreeCellDataFunc) links_page_num_func,
 380                                                  ev_sidebar_links, NULL);
 381
 382         g_signal_connect (GTK_TREE_VIEW (priv->tree_view),
 383                           "button_press_event",
 384                           G_CALLBACK (button_press_cb),
 385                           ev_sidebar_links);
 386         g_signal_connect (GTK_TREE_VIEW (priv->tree_view),
 387                           "popup_menu",
 388                           G_CALLBACK (popup_menu_cb),
 389                           ev_sidebar_links);
 390 }
 391
 392 static void
 393 ev_sidebar_links_init (EvSidebarLinks *ev_sidebar_links)
 394 {
 395         ev_sidebar_links->priv = EV_SIDEBAR_LINKS_GET_PRIVATE (ev_sidebar_links);
 396
 397         ev_sidebar_links_construct (ev_sidebar_links);
 398 }
 399
 400 static void
 401 links_page_num_func (GtkTreeViewColumn *tree_column,
 402                      GtkCellRenderer   *cell,
 403                      GtkTreeModel      *tree_model,
 404                      GtkTreeIter       *iter,
 405                      EvSidebarLinks    *sidebar_links)
 406 {
 407         EvLink *link;
 408
 409         gtk_tree_model_get (tree_model, iter,
 410                             EV_DOCUMENT_LINKS_COLUMN_LINK, &link,
 411                             -1);
 412
 413         if (link != NULL &&
 414             ev_link_get_link_type (link) == EV_LINK_TYPE_PAGE) {
 415                 gchar *page_label;
 416                 gchar *page_string;
 417
 418                 page_label = ev_page_cache_get_page_label (sidebar_links->priv->page_cache, ev_link_get_page (link));
 419                 page_string = g_markup_printf_escaped ("<i>%s</i>", page_label);
 420
 421                 g_object_set (cell,
 422                               "markup", page_string,
 423                               "visible", TRUE,
 424                               NULL);
 425
 426                 g_free (page_label);
 427                 g_free (page_string);
 428         } else {
 429                 g_object_set (cell,
 430                               "visible", FALSE,
 431                               NULL);
 432         }
 433 }
 434
 435 /* Public Functions */
 436
 437 GtkWidget *
 438 ev_sidebar_links_new (void)
 439 {
 440         GtkWidget *ev_sidebar_links;
 441
 442         ev_sidebar_links = g_object_new (EV_TYPE_SIDEBAR_LINKS, NULL);
 443
 444         return ev_sidebar_links;
 445 }
 446
 447 static gboolean
 448 update_page_callback_foreach (GtkTreeModel *model,
 449                               GtkTreePath  *path,
 450                               GtkTreeIter  *iter,
 451                               gpointer      data)
 452 {
 453         EvSidebarLinks *sidebar_links = (data);
 454         EvLink *link;
 455
 456         gtk_tree_model_get (model, iter,
 457                             EV_DOCUMENT_LINKS_COLUMN_LINK, &link,
 458                             -1);
 459
 460         if (link && ev_link_get_link_type (link) == EV_LINK_TYPE_PAGE) {
 461                 int current_page;
 462
 463                 current_page = ev_page_cache_get_current_page (sidebar_links->priv->page_cache);
 464                 if (ev_link_get_page (link) == current_page) {
 465                         GtkTreeSelection *selection;
 466
 467                         selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (sidebar_links->priv->tree_view));
 468
 469                         gtk_tree_selection_select_path (selection, path);
 470
 471                         return TRUE;
 472                 }
 473         }
 474
 475         return FALSE;
 476 }
 477
 478 static void
 479 update_page_callback (EvPageCache    *page_cache,
 480                       gint            current_page,
 481                       EvSidebarLinks *sidebar_links)
 482 {
 483         GtkTreeSelection *selection;
 484         /* We go through the tree linearly looking for the first page that
 485          * matches.  This is pretty inefficient.  We can do something neat with
 486          * a GtkTreeModelSort here to make it faster, if it turns out to be
 487          * slow.
 488          */
 489
 490         selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (sidebar_links->priv->tree_view));
 491
 492         g_signal_handler_block (selection, sidebar_links->priv->selection_id);
 493         g_signal_handler_block (sidebar_links->priv->tree_view, sidebar_links->priv->row_activated_id);
 494
 495         gtk_tree_selection_unselect_all (selection);
 496         gtk_tree_model_foreach (sidebar_links->priv->model,
 497                                 update_page_callback_foreach,
 498                                 sidebar_links);
 499
 500         g_signal_handler_unblock (selection, sidebar_links->priv->selection_id);
 501         g_signal_handler_unblock (sidebar_links->priv->tree_view, sidebar_links->priv->row_activated_id);
 502 }
 503
 504 static void
 505 row_activated_callback                  (GtkTreeView *treeview,
 506                                          GtkTreePath *arg1,
 507                                          GtkTreeViewColumn *arg2,
 508                                          gpointer user_data)
 509 {
 510         if (gtk_tree_view_row_expanded (GTK_TREE_VIEW (treeview), arg1)) {
 511                     gtk_tree_view_collapse_row (GTK_TREE_VIEW (treeview), arg1);
 512         } else {
 513                     gtk_tree_view_expand_row (GTK_TREE_VIEW (treeview), arg1, FALSE);
 514         }
 515
 516         return;
 517 }
 518
 519 static void
 520 job_finished_callback (EvJobLinks     *job,
 521                        EvSidebarLinks *sidebar_links)
 522 {
 523         EvSidebarLinksPrivate *priv;
 524         GtkTreeSelection *selection;
 525         GtkTreeIter iter;
 526         GtkTreePath *path;
 527         gboolean result;
 528
 529         priv = sidebar_links->priv;
 530
 531         priv->model = g_object_ref (job->model);
 532         g_object_notify (G_OBJECT (sidebar_links), "model");
 533
 534         gtk_tree_view_set_model (GTK_TREE_VIEW (priv->tree_view), job->model);
 535         g_object_unref (job);
 536         priv->job = NULL;
 537
 538         /* Expand one level of the tree */
 539         path = gtk_tree_path_new_first ();
 540         for (result = gtk_tree_model_get_iter_first (priv->model, &iter);
 541              result;
 542              result = gtk_tree_model_iter_next (priv->model, &iter)) {
 543                 gtk_tree_view_expand_row (GTK_TREE_VIEW (priv->tree_view), path, FALSE);
 544                 gtk_tree_path_next (path);
 545         }
 546         gtk_tree_path_free (path);
 547
 548         selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (priv->tree_view));
 549         gtk_tree_selection_set_mode (selection, GTK_SELECTION_SINGLE);
 550         priv->selection_id = g_signal_connect (selection, "changed",
 551                                                G_CALLBACK (selection_changed_callback),
 552                                                sidebar_links);
 553         priv->page_changed_id = g_signal_connect (priv->page_cache, "page-changed",
 554                                                   G_CALLBACK (update_page_callback),
 555                                                   sidebar_links);
 556         priv->row_activated_id = g_signal_connect (G_OBJECT (priv->tree_view), "row-activated",
 557                                                     G_CALLBACK (row_activated_callback), sidebar_links);
 558         update_page_callback (priv->page_cache,
 559                               ev_page_cache_get_current_page (priv->page_cache),
 560                               sidebar_links);
 561
 562 }
 563
 564 static void
 565 ev_sidebar_links_set_document (EvSidebarPage  *sidebar_page,
 566                                EvDocument     *document)
 567 {
 568         EvSidebarLinks *sidebar_links;
 569         EvSidebarLinksPrivate *priv;
 570
 571         g_return_if_fail (EV_IS_SIDEBAR_PAGE (sidebar_page));
 572         g_return_if_fail (EV_IS_DOCUMENT (document));
 573
 574         sidebar_links = EV_SIDEBAR_LINKS (sidebar_page);
 575
 576         priv = sidebar_links->priv;
 577
 578         if (priv->document) {
 579                 gtk_tree_view_set_model (GTK_TREE_VIEW (priv->tree_view), NULL);
 580                 g_object_unref (priv->document);
 581         }
 582
 583         priv->document = g_object_ref (document);
 584         priv->page_cache = ev_page_cache_get (document);
 585
 586         if (priv->job) {
 587                 g_signal_handlers_disconnect_by_func (priv->job,
 588                                                       job_finished_callback,
 589                                                       sidebar_links);
 590                 g_object_unref (priv->job);
 591         }
 592
 593         priv->job = ev_job_links_new (document);
 594         g_signal_connect (priv->job,
 595                           "finished",
 596                           G_CALLBACK (job_finished_callback),
 597                           sidebar_links);
 598         /* The priority doesn't matter for this job */
 599         ev_job_queue_add_job (priv->job, EV_JOB_PRIORITY_LOW);
 600 }
 601
 602 static gboolean
 603 ev_sidebar_links_support_document (EvSidebarPage  *sidebar_page,
 604                                    EvDocument *document)
 605 {
 606         return (EV_IS_DOCUMENT_LINKS (document) &&
 607                     ev_document_links_has_document_links (EV_DOCUMENT_LINKS (document)));
 608 }
 609
 610 static const gchar*
 611 ev_sidebar_links_get_label (EvSidebarPage *sidebar_page)
 612 {
 613     return _("Index");
 614 }
 615
 616 GtkWidget *
 617 ev_sidebar_links_get_treeview (EvSidebarLinks *sidebar)
 618 {
 619         return sidebar->priv->tree_view;
 620 }
 621
 622 static void
 623 ev_sidebar_links_page_iface_init (EvSidebarPageIface *iface)
 624 {
 625         iface->support_document = ev_sidebar_links_support_document;
 626         iface->set_document = ev_sidebar_links_set_document;
 627         iface->get_label = ev_sidebar_links_get_label;
 628 }
 629