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                                                      G_TYPE_BOOLEAN);
 225
 226         gtk_list_store_append (GTK_LIST_STORE (retval), &iter);
 227         markup = g_strdup_printf ("<span size=\"larger\" style=\"italic\">%s</span>", _("Loading..."));
 228         gtk_list_store_set (GTK_LIST_STORE (retval), &iter,
 229                             EV_DOCUMENT_LINKS_COLUMN_MARKUP, markup,
 230                             EV_DOCUMENT_LINKS_COLUMN_EXPAND, FALSE,
 231                             EV_DOCUMENT_LINKS_COLUMN_LINK, NULL,
 232                             -1);
 233         g_free (markup);
 234
 235         return retval;
 236 }
 237
 238 static void
 239 print_section_cb (GtkWidget *menuitem, EvSidebarLinks *sidebar)
 240 {
 241         GtkWidget *window;
 242         GtkTreeSelection *selection;
 243         GtkTreeModel *model;
 244         GtkTreeIter iter;
 245
 246         selection = gtk_tree_view_get_selection
 247                 (GTK_TREE_VIEW (sidebar->priv->tree_view));
 248
 249         if (gtk_tree_selection_get_selected (selection, &model, &iter)) {
 250                 EvLink *link;
 251                 int first_page, last_page;
 252
 253                 gtk_tree_model_get (model, &iter,
 254                                     EV_DOCUMENT_LINKS_COLUMN_LINK, &link,
 255                                     -1);
 256                 first_page = ev_link_get_page (link) + 1;
 257
 258                 if (gtk_tree_model_iter_next (model, &iter)) {
 259                         gtk_tree_model_get (model, &iter,
 260                                             EV_DOCUMENT_LINKS_COLUMN_LINK, &link,
 261                                             -1);
 262                         last_page = ev_link_get_page (link);
 263                 } else {
 264                         last_page = -1;
 265                 }
 266
 267                 window = gtk_widget_get_toplevel (GTK_WIDGET (sidebar));
 268                 if (EV_IS_WINDOW (window)) {
 269                         ev_window_print_range (EV_WINDOW (window),
 270                                                first_page, last_page);
 271                 }
 272         }
 273 }
 274
 275 static GtkMenu *
 276 build_popup_menu (EvSidebarLinks *sidebar)
 277 {
 278         GtkWidget *menu;
 279         GtkWidget *item;
 280
 281         menu = gtk_menu_new ();
 282         item = gtk_image_menu_item_new_from_stock (GTK_STOCK_PRINT, NULL);
 283         gtk_label_set_label (GTK_LABEL (GTK_BIN (item)->child), _("Print..."));
 284         gtk_widget_show (item);
 285         gtk_menu_shell_append (GTK_MENU_SHELL (menu), item);
 286         g_signal_connect (item, "activate",
 287                           G_CALLBACK (print_section_cb), sidebar);
 288
 289         return GTK_MENU (menu);
 290 }
 291
 292 static void
 293 popup_menu_cb (GtkWidget *treeview, EvSidebarLinks *sidebar)
 294 {
 295         GtkMenu *menu = build_popup_menu (sidebar);
 296
 297         gtk_menu_popup (menu, NULL, NULL,
 298                         ev_gui_menu_position_tree_selection,
 299                         sidebar->priv->tree_view, 0,
 300                         gtk_get_current_event_time ());
 301         gtk_menu_shell_select_first (GTK_MENU_SHELL (menu), FALSE);
 302 }
 303
 304 static gboolean
 305 button_press_cb (GtkWidget *treeview,
 306                  GdkEventButton *event,
 307                  EvSidebarLinks *sidebar)
 308 {
 309         GtkTreePath *path = NULL;
 310
 311         if (event->button == 3) {
 312                 if (gtk_tree_view_get_path_at_pos (GTK_TREE_VIEW (treeview),
 313                                                    event->x,
 314                                                    event->y,
 315                                                    &path,
 316                                                    NULL, NULL, NULL)) {
 317                         gtk_tree_view_set_cursor (GTK_TREE_VIEW (treeview),
 318                                                   path, NULL, FALSE);
 319                         gtk_menu_popup (build_popup_menu (sidebar), NULL,
 320                                         NULL, NULL, NULL, event->button,
 321                                         gtk_get_current_event_time ());
 322                         gtk_tree_path_free (path);
 323
 324                         return TRUE;
 325                 }
 326         }
 327
 328         return FALSE;
 329 }
 330
 331
 332 static void
 333 ev_sidebar_links_construct (EvSidebarLinks *ev_sidebar_links)
 334 {
 335         EvSidebarLinksPrivate *priv;
 336         GtkWidget *swindow;
 337         GtkTreeViewColumn *column;
 338         GtkCellRenderer *renderer;
 339         GtkTreeSelection *selection;
 340         GtkTreeModel *loading_model;
 341
 342         priv = ev_sidebar_links->priv;
 343
 344         swindow = gtk_scrolled_window_new (NULL, NULL);
 345
 346         gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (swindow),
 347                                         GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);
 348         gtk_scrolled_window_set_shadow_type (GTK_SCROLLED_WINDOW (swindow),
 349                                              GTK_SHADOW_IN);
 350
 351         /* Create tree view */
 352         loading_model = create_loading_model ();
 353         priv->tree_view = gtk_tree_view_new_with_model (loading_model);
 354         g_object_unref (loading_model);
 355
 356         selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (priv->tree_view));
 357         gtk_tree_selection_set_mode (selection, GTK_SELECTION_NONE);
 358         gtk_tree_view_set_headers_visible (GTK_TREE_VIEW (priv->tree_view), FALSE);
 359         gtk_container_add (GTK_CONTAINER (swindow), priv->tree_view);
 360
 361         gtk_box_pack_start (GTK_BOX (ev_sidebar_links), swindow, TRUE, TRUE, 0);
 362         gtk_widget_show_all (GTK_WIDGET (ev_sidebar_links));
 363
 364         column = gtk_tree_view_column_new ();
 365         gtk_tree_view_column_set_expand (GTK_TREE_VIEW_COLUMN (column), TRUE);
 366         gtk_tree_view_append_column (GTK_TREE_VIEW (priv->tree_view), column);
 367
 368         renderer = (GtkCellRenderer*)
 369                 g_object_new (GTK_TYPE_CELL_RENDERER_TEXT,
 370                               "ellipsize", PANGO_ELLIPSIZE_END,
 371                               NULL);
 372         gtk_tree_view_column_pack_start (GTK_TREE_VIEW_COLUMN (column), renderer, TRUE);
 373         gtk_tree_view_column_set_attributes (GTK_TREE_VIEW_COLUMN (column), renderer,
 374                                              "markup", EV_DOCUMENT_LINKS_COLUMN_MARKUP,
 375                                              NULL);
 376
 377
 378         renderer = gtk_cell_renderer_text_new ();
 379         gtk_tree_view_column_pack_end (GTK_TREE_VIEW_COLUMN (column), renderer, FALSE);
 380         gtk_tree_view_column_set_cell_data_func (GTK_TREE_VIEW_COLUMN (column), renderer,
 381                                                  (GtkTreeCellDataFunc) links_page_num_func,
 382                                                  ev_sidebar_links, NULL);
 383
 384         g_signal_connect (GTK_TREE_VIEW (priv->tree_view),
 385                           "button_press_event",
 386                           G_CALLBACK (button_press_cb),
 387                           ev_sidebar_links);
 388         g_signal_connect (GTK_TREE_VIEW (priv->tree_view),
 389                           "popup_menu",
 390                           G_CALLBACK (popup_menu_cb),
 391                           ev_sidebar_links);
 392 }
 393
 394 static void
 395 ev_sidebar_links_init (EvSidebarLinks *ev_sidebar_links)
 396 {
 397         ev_sidebar_links->priv = EV_SIDEBAR_LINKS_GET_PRIVATE (ev_sidebar_links);
 398
 399         ev_sidebar_links_construct (ev_sidebar_links);
 400 }
 401
 402 static void
 403 links_page_num_func (GtkTreeViewColumn *tree_column,
 404                      GtkCellRenderer   *cell,
 405                      GtkTreeModel      *tree_model,
 406                      GtkTreeIter       *iter,
 407                      EvSidebarLinks    *sidebar_links)
 408 {
 409         EvLink *link;
 410
 411         gtk_tree_model_get (tree_model, iter,
 412                             EV_DOCUMENT_LINKS_COLUMN_LINK, &link,
 413                             -1);
 414
 415         if (link != NULL &&
 416             ev_link_get_link_type (link) == EV_LINK_TYPE_PAGE) {
 417                 gchar *page_label;
 418                 gchar *page_string;
 419
 420                 page_label = ev_page_cache_get_page_label (sidebar_links->priv->page_cache, ev_link_get_page (link));
 421                 page_string = g_markup_printf_escaped ("<i>%s</i>", page_label);
 422
 423                 g_object_set (cell,
 424                               "markup", page_string,
 425                               "visible", TRUE,
 426                               NULL);
 427
 428                 g_free (page_label);
 429                 g_free (page_string);
 430         } else {
 431                 g_object_set (cell,
 432                               "visible", FALSE,
 433                               NULL);
 434         }
 435 }
 436
 437 /* Public Functions */
 438
 439 GtkWidget *
 440 ev_sidebar_links_new (void)
 441 {
 442         GtkWidget *ev_sidebar_links;
 443
 444         ev_sidebar_links = g_object_new (EV_TYPE_SIDEBAR_LINKS, NULL);
 445
 446         return ev_sidebar_links;
 447 }
 448
 449 static gboolean
 450 update_page_callback_foreach (GtkTreeModel *model,
 451                               GtkTreePath  *path,
 452                               GtkTreeIter  *iter,
 453                               gpointer      data)
 454 {
 455         EvSidebarLinks *sidebar_links = (data);
 456         EvLink *link;
 457
 458         gtk_tree_model_get (model, iter,
 459                             EV_DOCUMENT_LINKS_COLUMN_LINK, &link,
 460                             -1);
 461
 462         if (link && ev_link_get_link_type (link) == EV_LINK_TYPE_PAGE) {
 463                 int current_page;
 464
 465                 current_page = ev_page_cache_get_current_page (sidebar_links->priv->page_cache);
 466                 if (ev_link_get_page (link) == current_page) {
 467                         GtkTreeSelection *selection;
 468
 469                         selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (sidebar_links->priv->tree_view));
 470
 471                         gtk_tree_selection_select_path (selection, path);
 472
 473                         return TRUE;
 474                 }
 475         }
 476
 477         return FALSE;
 478 }
 479
 480 static void
 481 update_page_callback (EvPageCache    *page_cache,
 482                       gint            current_page,
 483                       EvSidebarLinks *sidebar_links)
 484 {
 485         GtkTreeSelection *selection;
 486         /* We go through the tree linearly looking for the first page that
 487          * matches.  This is pretty inefficient.  We can do something neat with
 488          * a GtkTreeModelSort here to make it faster, if it turns out to be
 489          * slow.
 490          */
 491
 492         selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (sidebar_links->priv->tree_view));
 493
 494         g_signal_handler_block (selection, sidebar_links->priv->selection_id);
 495         g_signal_handler_block (sidebar_links->priv->tree_view, sidebar_links->priv->row_activated_id);
 496
 497         gtk_tree_selection_unselect_all (selection);
 498         gtk_tree_model_foreach (sidebar_links->priv->model,
 499                                 update_page_callback_foreach,
 500                                 sidebar_links);
 501
 502         g_signal_handler_unblock (selection, sidebar_links->priv->selection_id);
 503         g_signal_handler_unblock (sidebar_links->priv->tree_view, sidebar_links->priv->row_activated_id);
 504 }
 505
 506 static void
 507 row_activated_callback                  (GtkTreeView *treeview,
 508                                          GtkTreePath *arg1,
 509                                          GtkTreeViewColumn *arg2,
 510                                          gpointer user_data)
 511 {
 512         if (gtk_tree_view_row_expanded (GTK_TREE_VIEW (treeview), arg1)) {
 513                     gtk_tree_view_collapse_row (GTK_TREE_VIEW (treeview), arg1);
 514         } else {
 515                     gtk_tree_view_expand_row (GTK_TREE_VIEW (treeview), arg1, FALSE);
 516         }
 517
 518         return;
 519 }
 520
 521 static void
 522 expand_open_links (GtkTreeView *tree_view, GtkTreeModel *model, GtkTreeIter *parent)
 523 {
 524         GtkTreeIter iter;
 525         EvLink *link;
 526         gboolean expand;
 527
 528         if (gtk_tree_model_iter_children (model, &iter, parent)) {
 529                 do {
 530                         gtk_tree_model_get (model, &iter,
 531                                             EV_DOCUMENT_LINKS_COLUMN_LINK, &link,
 532                                             EV_DOCUMENT_LINKS_COLUMN_EXPAND, &expand,
 533                                             -1);
 534                         if (expand) {
 535                                 GtkTreePath *path;
 536
 537                                 path = gtk_tree_model_get_path (model, &iter);
 538                                 gtk_tree_view_expand_row (tree_view, path, FALSE);
 539                                 gtk_tree_path_free (path);
 540                         }
 541
 542                         expand_open_links (tree_view, model, &iter);
 543                 } while (gtk_tree_model_iter_next (model, &iter));
 544         }
 545 }
 546
 547 static void
 548 job_finished_callback (EvJobLinks     *job,
 549                        EvSidebarLinks *sidebar_links)
 550 {
 551         EvSidebarLinksPrivate *priv;
 552         GtkTreeSelection *selection;
 553
 554         priv = sidebar_links->priv;
 555
 556         priv->model = g_object_ref (job->model);
 557         g_object_notify (G_OBJECT (sidebar_links), "model");
 558
 559         gtk_tree_view_set_model (GTK_TREE_VIEW (priv->tree_view), job->model);
 560         g_object_unref (job);
 561         priv->job = NULL;
 562
 563         expand_open_links (GTK_TREE_VIEW (priv->tree_view), priv->model, NULL);
 564
 565         selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (priv->tree_view));
 566         gtk_tree_selection_set_mode (selection, GTK_SELECTION_SINGLE);
 567         priv->selection_id = g_signal_connect (selection, "changed",
 568                                                G_CALLBACK (selection_changed_callback),
 569                                                sidebar_links);
 570         priv->page_changed_id = g_signal_connect (priv->page_cache, "page-changed",
 571                                                   G_CALLBACK (update_page_callback),
 572                                                   sidebar_links);
 573         priv->row_activated_id = g_signal_connect (G_OBJECT (priv->tree_view), "row-activated",
 574                                                     G_CALLBACK (row_activated_callback), sidebar_links);
 575         update_page_callback (priv->page_cache,
 576                               ev_page_cache_get_current_page (priv->page_cache),
 577                               sidebar_links);
 578
 579 }
 580
 581 static void
 582 ev_sidebar_links_set_document (EvSidebarPage  *sidebar_page,
 583                                EvDocument     *document)
 584 {
 585         EvSidebarLinks *sidebar_links;
 586         EvSidebarLinksPrivate *priv;
 587
 588         g_return_if_fail (EV_IS_SIDEBAR_PAGE (sidebar_page));
 589         g_return_if_fail (EV_IS_DOCUMENT (document));
 590
 591         sidebar_links = EV_SIDEBAR_LINKS (sidebar_page);
 592
 593         priv = sidebar_links->priv;
 594
 595         if (priv->document) {
 596                 gtk_tree_view_set_model (GTK_TREE_VIEW (priv->tree_view), NULL);
 597                 g_object_unref (priv->document);
 598         }
 599
 600         priv->document = g_object_ref (document);
 601         priv->page_cache = ev_page_cache_get (document);
 602
 603         if (priv->job) {
 604                 g_signal_handlers_disconnect_by_func (priv->job,
 605                                                       job_finished_callback,
 606                                                       sidebar_links);
 607                 g_object_unref (priv->job);
 608         }
 609
 610         priv->job = ev_job_links_new (document);
 611         g_signal_connect (priv->job,
 612                           "finished",
 613                           G_CALLBACK (job_finished_callback),
 614                           sidebar_links);
 615         /* The priority doesn't matter for this job */
 616         ev_job_queue_add_job (priv->job, EV_JOB_PRIORITY_LOW);
 617 }
 618
 619 static gboolean
 620 ev_sidebar_links_support_document (EvSidebarPage  *sidebar_page,
 621                                    EvDocument *document)
 622 {
 623         return (EV_IS_DOCUMENT_LINKS (document) &&
 624                     ev_document_links_has_document_links (EV_DOCUMENT_LINKS (document)));
 625 }
 626
 627 static const gchar*
 628 ev_sidebar_links_get_label (EvSidebarPage *sidebar_page)
 629 {
 630     return _("Index");
 631 }
 632
 633 GtkWidget *
 634 ev_sidebar_links_get_treeview (EvSidebarLinks *sidebar)
 635 {
 636         return sidebar->priv->tree_view;
 637 }
 638
 639 static void
 640 ev_sidebar_links_page_iface_init (EvSidebarPageIface *iface)
 641 {
 642         iface->support_document = ev_sidebar_links_support_document;
 643         iface->set_document = ev_sidebar_links_set_document;
 644         iface->get_label = ev_sidebar_links_get_label;
 645 }
 646