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         PROP_WIDGET,
  56 };
  57
  58
  59 static void links_page_num_func                         (GtkTreeViewColumn *tree_column,
  60                                                          GtkCellRenderer   *cell,
  61                                                          GtkTreeModel      *tree_model,
  62                                                          GtkTreeIter       *iter,
  63                                                          EvSidebarLinks    *sidebar_links);
  64 static void update_page_callback                        (EvPageCache       *page_cache,
  65                                                          gint               current_page,
  66                                                          EvSidebarLinks    *sidebar_links);
  67 static void row_activated_callback                      (GtkTreeView *treeview,
  68                                                          GtkTreePath *arg1,
  69                                                          GtkTreeViewColumn *arg2,
  70                                                          gpointer user_data);
  71 static void job_finished_callback                       (EvJobLinks     *job,
  72                                                          EvSidebarLinks *sidebar_links);
  73 static void ev_sidebar_links_page_iface_init            (EvSidebarPageIface *iface);
  74 static void ev_sidebar_links_set_document               (EvSidebarPage  *sidebar_page,
  75                                                          EvDocument     *document);
  76 static gboolean ev_sidebar_links_support_document       (EvSidebarPage  *sidebar_page,
  77                                                          EvDocument     *document);
  78 static const gchar* ev_sidebar_links_get_label          (EvSidebarPage *sidebar_page);
  79
  80
  81 G_DEFINE_TYPE_EXTENDED (EvSidebarLinks,
  82                         ev_sidebar_links,
  83                         GTK_TYPE_VBOX,
  84                         0,
  85                         G_IMPLEMENT_INTERFACE (EV_TYPE_SIDEBAR_PAGE,
  86                                                ev_sidebar_links_page_iface_init))
  87
  88
  89 #define EV_SIDEBAR_LINKS_GET_PRIVATE(object) \
  90         (G_TYPE_INSTANCE_GET_PRIVATE ((object), EV_TYPE_SIDEBAR_LINKS, EvSidebarLinksPrivate))
  91
  92 static void
  93 ev_sidebar_links_set_property (GObject      *object,
  94                                guint         prop_id,
  95                                const GValue *value,
  96                                GParamSpec   *pspec)
  97 {
  98         EvSidebarLinks *ev_sidebar_links;
  99         GtkTreeModel *model;
 100
 101         ev_sidebar_links = EV_SIDEBAR_LINKS (object);
 102
 103         switch (prop_id)
 104         {
 105         case PROP_MODEL:
 106                 model = ev_sidebar_links->priv->model;
 107                 ev_sidebar_links->priv->model = GTK_TREE_MODEL (g_value_dup_object (value));
 108                 if (model)
 109                         g_object_unref (model);
 110                 break;
 111         default:
 112                 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 113                 break;
 114         }
 115 }
 116
 117 static void
 118 ev_sidebar_links_get_property (GObject    *object,
 119                                guint       prop_id,
 120                                GValue     *value,
 121                                GParamSpec *pspec)
 122 {
 123         EvSidebarLinks *ev_sidebar_links;
 124
 125         ev_sidebar_links = EV_SIDEBAR_LINKS (object);
 126
 127         switch (prop_id)
 128         {
 129         case PROP_MODEL:
 130                 g_value_set_object (value, ev_sidebar_links->priv->model);
 131                 break;
 132         case PROP_WIDGET:
 133                 g_value_set_object (value, ev_sidebar_links->priv->tree_view);
 134                 break;
 135         default:
 136                 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 137                 break;
 138         }
 139 }
 140
 141 static void
 142 ev_sidebar_links_dispose (GObject *object)
 143 {
 144         EvSidebarLinks *sidebar = EV_SIDEBAR_LINKS (object);
 145
 146         if (sidebar->priv->document) {
 147                 g_object_unref (sidebar->priv->document);
 148                 sidebar->priv->document = NULL;
 149                 sidebar->priv->page_cache = NULL;
 150         }
 151
 152         if (sidebar->priv->job) {
 153                 g_signal_handlers_disconnect_by_func (sidebar->priv->job,
 154                                                       job_finished_callback, sidebar);
 155                 ev_job_queue_remove_job (sidebar->priv->job);
 156                 g_object_unref (sidebar->priv->job);
 157                 sidebar->priv->job = NULL;
 158         }
 159
 160         G_OBJECT_CLASS (ev_sidebar_links_parent_class)->dispose (object);
 161 }
 162
 163 static void
 164 ev_sidebar_links_class_init (EvSidebarLinksClass *ev_sidebar_links_class)
 165 {
 166         GObjectClass *g_object_class;
 167
 168         g_object_class = G_OBJECT_CLASS (ev_sidebar_links_class);
 169
 170         g_object_class->set_property = ev_sidebar_links_set_property;
 171         g_object_class->get_property = ev_sidebar_links_get_property;
 172         g_object_class->dispose = ev_sidebar_links_dispose;
 173
 174         g_object_class_install_property (g_object_class,
 175                                          PROP_MODEL,
 176                                          g_param_spec_object ("model",
 177                                                               "Model",
 178                                                               "Current Model",
 179                                                               GTK_TYPE_TREE_MODEL,
 180                                                               G_PARAM_READWRITE));
 181         g_object_class_override_property (g_object_class,
 182                                           PROP_WIDGET,
 183                                           "main-widget");
 184
 185         g_type_class_add_private (g_object_class, sizeof (EvSidebarLinksPrivate));
 186 }
 187
 188 static void
 189 selection_changed_callback (GtkTreeSelection   *selection,
 190                             EvSidebarLinks     *ev_sidebar_links)
 191 {
 192         EvDocument *document;
 193         GtkTreeModel *model;
 194         GtkTreeIter iter;
 195
 196         g_return_if_fail (EV_IS_SIDEBAR_LINKS (ev_sidebar_links));
 197
 198         document = EV_DOCUMENT (ev_sidebar_links->priv->document);
 199         g_return_if_fail (ev_sidebar_links->priv->document != NULL);
 200
 201         if (gtk_tree_selection_get_selected (selection, &model, &iter)) {
 202                 EvLink *link;
 203
 204                 gtk_tree_model_get (model, &iter,
 205                                     EV_DOCUMENT_LINKS_COLUMN_LINK, &link,
 206                                     -1);
 207
 208                 if (link == NULL)
 209                         return;
 210
 211                 g_signal_handler_block (ev_sidebar_links->priv->page_cache,
 212                                         ev_sidebar_links->priv->page_changed_id);
 213                 /* FIXME: we should handle this better.  This breaks w/ URLs */
 214                 ev_page_cache_set_link (ev_sidebar_links->priv->page_cache, link);
 215                 g_signal_handler_unblock (ev_sidebar_links->priv->page_cache,
 216                                           ev_sidebar_links->priv->page_changed_id);
 217         }
 218 }
 219
 220 static GtkTreeModel *
 221 create_loading_model (void)
 222 {
 223         GtkTreeModel *retval;
 224         GtkTreeIter iter;
 225         gchar *markup;
 226
 227         /* Creates a fake model to indicate that we're loading */
 228         retval = (GtkTreeModel *)gtk_list_store_new (EV_DOCUMENT_LINKS_COLUMN_NUM_COLUMNS,
 229                                                      G_TYPE_STRING,
 230                                                      G_TYPE_OBJECT,
 231                                                      G_TYPE_BOOLEAN);
 232
 233         gtk_list_store_append (GTK_LIST_STORE (retval), &iter);
 234         markup = g_strdup_printf ("<span size=\"larger\" style=\"italic\">%s</span>", _("Loading..."));
 235         gtk_list_store_set (GTK_LIST_STORE (retval), &iter,
 236                             EV_DOCUMENT_LINKS_COLUMN_MARKUP, markup,
 237                             EV_DOCUMENT_LINKS_COLUMN_EXPAND, FALSE,
 238                             EV_DOCUMENT_LINKS_COLUMN_LINK, NULL,
 239                             -1);
 240         g_free (markup);
 241
 242         return retval;
 243 }
 244
 245 static void
 246 print_section_cb (GtkWidget *menuitem, EvSidebarLinks *sidebar)
 247 {
 248         GtkWidget *window;
 249         GtkTreeSelection *selection;
 250         GtkTreeModel *model;
 251         GtkTreeIter iter;
 252
 253         selection = gtk_tree_view_get_selection
 254                 (GTK_TREE_VIEW (sidebar->priv->tree_view));
 255
 256         if (gtk_tree_selection_get_selected (selection, &model, &iter)) {
 257                 EvLink *link;
 258                 int first_page, last_page;
 259
 260                 gtk_tree_model_get (model, &iter,
 261                                     EV_DOCUMENT_LINKS_COLUMN_LINK, &link,
 262                                     -1);
 263                 first_page = ev_link_get_page (link) + 1;
 264
 265                 if (gtk_tree_model_iter_next (model, &iter)) {
 266                         gtk_tree_model_get (model, &iter,
 267                                             EV_DOCUMENT_LINKS_COLUMN_LINK, &link,
 268                                             -1);
 269                         last_page = ev_link_get_page (link);
 270                 } else {
 271                         last_page = -1;
 272                 }
 273
 274                 window = gtk_widget_get_toplevel (GTK_WIDGET (sidebar));
 275                 if (EV_IS_WINDOW (window)) {
 276                         ev_window_print_range (EV_WINDOW (window),
 277                                                first_page, last_page);
 278                 }
 279         }
 280 }
 281
 282 static GtkMenu *
 283 build_popup_menu (EvSidebarLinks *sidebar)
 284 {
 285         GtkWidget *menu;
 286         GtkWidget *item;
 287
 288         menu = gtk_menu_new ();
 289         item = gtk_image_menu_item_new_from_stock (GTK_STOCK_PRINT, NULL);
 290         gtk_label_set_label (GTK_LABEL (GTK_BIN (item)->child), _("Print..."));
 291         gtk_widget_show (item);
 292         gtk_menu_shell_append (GTK_MENU_SHELL (menu), item);
 293         g_signal_connect (item, "activate",
 294                           G_CALLBACK (print_section_cb), sidebar);
 295
 296         return GTK_MENU (menu);
 297 }
 298
 299 static void
 300 popup_menu_cb (GtkWidget *treeview, EvSidebarLinks *sidebar)
 301 {
 302         GtkMenu *menu = build_popup_menu (sidebar);
 303
 304         gtk_menu_popup (menu, NULL, NULL,
 305                         ev_gui_menu_position_tree_selection,
 306                         sidebar->priv->tree_view, 0,
 307                         gtk_get_current_event_time ());
 308         gtk_menu_shell_select_first (GTK_MENU_SHELL (menu), FALSE);
 309 }
 310
 311 static gboolean
 312 button_press_cb (GtkWidget *treeview,
 313                  GdkEventButton *event,
 314                  EvSidebarLinks *sidebar)
 315 {
 316         GtkTreePath *path = NULL;
 317
 318         if (event->button == 3) {
 319                 if (gtk_tree_view_get_path_at_pos (GTK_TREE_VIEW (treeview),
 320                                                    event->x,
 321                                                    event->y,
 322                                                    &path,
 323                                                    NULL, NULL, NULL)) {
 324                         gtk_tree_view_set_cursor (GTK_TREE_VIEW (treeview),
 325                                                   path, NULL, FALSE);
 326                         gtk_menu_popup (build_popup_menu (sidebar), NULL,
 327                                         NULL, NULL, NULL, event->button,
 328                                         gtk_get_current_event_time ());
 329                         gtk_tree_path_free (path);
 330
 331                         return TRUE;
 332                 }
 333         }
 334
 335         return FALSE;
 336 }
 337
 338
 339 static void
 340 ev_sidebar_links_construct (EvSidebarLinks *ev_sidebar_links)
 341 {
 342         EvSidebarLinksPrivate *priv;
 343         GtkWidget *swindow;
 344         GtkTreeViewColumn *column;
 345         GtkCellRenderer *renderer;
 346         GtkTreeSelection *selection;
 347         GtkTreeModel *loading_model;
 348
 349         priv = ev_sidebar_links->priv;
 350
 351         swindow = gtk_scrolled_window_new (NULL, NULL);
 352
 353         gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (swindow),
 354                                         GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);
 355         gtk_scrolled_window_set_shadow_type (GTK_SCROLLED_WINDOW (swindow),
 356                                              GTK_SHADOW_IN);
 357
 358         /* Create tree view */
 359         loading_model = create_loading_model ();
 360         priv->tree_view = gtk_tree_view_new_with_model (loading_model);
 361         g_object_unref (loading_model);
 362
 363         selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (priv->tree_view));
 364         gtk_tree_selection_set_mode (selection, GTK_SELECTION_NONE);
 365         gtk_tree_view_set_headers_visible (GTK_TREE_VIEW (priv->tree_view), FALSE);
 366         gtk_container_add (GTK_CONTAINER (swindow), priv->tree_view);
 367
 368         gtk_box_pack_start (GTK_BOX (ev_sidebar_links), swindow, TRUE, TRUE, 0);
 369         gtk_widget_show_all (GTK_WIDGET (ev_sidebar_links));
 370
 371         column = gtk_tree_view_column_new ();
 372         gtk_tree_view_column_set_expand (GTK_TREE_VIEW_COLUMN (column), TRUE);
 373         gtk_tree_view_append_column (GTK_TREE_VIEW (priv->tree_view), column);
 374
 375         renderer = (GtkCellRenderer*)
 376                 g_object_new (GTK_TYPE_CELL_RENDERER_TEXT,
 377                               "ellipsize", PANGO_ELLIPSIZE_END,
 378                               NULL);
 379         gtk_tree_view_column_pack_start (GTK_TREE_VIEW_COLUMN (column), renderer, TRUE);
 380         gtk_tree_view_column_set_attributes (GTK_TREE_VIEW_COLUMN (column), renderer,
 381                                              "markup", EV_DOCUMENT_LINKS_COLUMN_MARKUP,
 382                                              NULL);
 383
 384
 385         renderer = gtk_cell_renderer_text_new ();
 386         gtk_tree_view_column_pack_end (GTK_TREE_VIEW_COLUMN (column), renderer, FALSE);
 387         gtk_tree_view_column_set_cell_data_func (GTK_TREE_VIEW_COLUMN (column), renderer,
 388                                                  (GtkTreeCellDataFunc) links_page_num_func,
 389                                                  ev_sidebar_links, NULL);
 390
 391         g_signal_connect (GTK_TREE_VIEW (priv->tree_view),
 392                           "button_press_event",
 393                           G_CALLBACK (button_press_cb),
 394                           ev_sidebar_links);
 395         g_signal_connect (GTK_TREE_VIEW (priv->tree_view),
 396                           "popup_menu",
 397                           G_CALLBACK (popup_menu_cb),
 398                           ev_sidebar_links);
 399 }
 400
 401 static void
 402 ev_sidebar_links_init (EvSidebarLinks *ev_sidebar_links)
 403 {
 404         ev_sidebar_links->priv = EV_SIDEBAR_LINKS_GET_PRIVATE (ev_sidebar_links);
 405
 406         ev_sidebar_links_construct (ev_sidebar_links);
 407 }
 408
 409 static void
 410 links_page_num_func (GtkTreeViewColumn *tree_column,
 411                      GtkCellRenderer   *cell,
 412                      GtkTreeModel      *tree_model,
 413                      GtkTreeIter       *iter,
 414                      EvSidebarLinks    *sidebar_links)
 415 {
 416         EvLink *link;
 417
 418         gtk_tree_model_get (tree_model, iter,
 419                             EV_DOCUMENT_LINKS_COLUMN_LINK, &link,
 420                             -1);
 421
 422         if (link != NULL &&
 423             ev_link_get_link_type (link) == EV_LINK_TYPE_PAGE) {
 424                 gchar *page_label;
 425                 gchar *page_string;
 426
 427                 page_label = ev_page_cache_get_page_label (sidebar_links->priv->page_cache, ev_link_get_page (link));
 428                 page_string = g_markup_printf_escaped ("<i>%s</i>", page_label);
 429
 430                 g_object_set (cell,
 431                               "markup", page_string,
 432                               "visible", TRUE,
 433                               NULL);
 434
 435                 g_free (page_label);
 436                 g_free (page_string);
 437         } else {
 438                 g_object_set (cell,
 439                               "visible", FALSE,
 440                               NULL);
 441         }
 442 }
 443
 444 /* Public Functions */
 445
 446 GtkWidget *
 447 ev_sidebar_links_new (void)
 448 {
 449         GtkWidget *ev_sidebar_links;
 450
 451         ev_sidebar_links = g_object_new (EV_TYPE_SIDEBAR_LINKS, NULL);
 452
 453         return ev_sidebar_links;
 454 }
 455
 456 static gboolean
 457 update_page_callback_foreach (GtkTreeModel *model,
 458                               GtkTreePath  *path,
 459                               GtkTreeIter  *iter,
 460                               gpointer      data)
 461 {
 462         EvSidebarLinks *sidebar_links = (data);
 463         EvLink *link;
 464
 465         gtk_tree_model_get (model, iter,
 466                             EV_DOCUMENT_LINKS_COLUMN_LINK, &link,
 467                             -1);
 468
 469         if (link && ev_link_get_link_type (link) == EV_LINK_TYPE_PAGE) {
 470                 int current_page;
 471
 472                 current_page = ev_page_cache_get_current_page (sidebar_links->priv->page_cache);
 473                 if (ev_link_get_page (link) == current_page) {
 474                         GtkTreeSelection *selection;
 475
 476                         selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (sidebar_links->priv->tree_view));
 477
 478                         gtk_tree_selection_select_path (selection, path);
 479
 480                         return TRUE;
 481                 }
 482         }
 483
 484         return FALSE;
 485 }
 486
 487 static void
 488 update_page_callback (EvPageCache    *page_cache,
 489                       gint            current_page,
 490                       EvSidebarLinks *sidebar_links)
 491 {
 492         GtkTreeSelection *selection;
 493         /* We go through the tree linearly looking for the first page that
 494          * matches.  This is pretty inefficient.  We can do something neat with
 495          * a GtkTreeModelSort here to make it faster, if it turns out to be
 496          * slow.
 497          */
 498
 499         selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (sidebar_links->priv->tree_view));
 500
 501         g_signal_handler_block (selection, sidebar_links->priv->selection_id);
 502         g_signal_handler_block (sidebar_links->priv->tree_view, sidebar_links->priv->row_activated_id);
 503
 504         gtk_tree_selection_unselect_all (selection);
 505         gtk_tree_model_foreach (sidebar_links->priv->model,
 506                                 update_page_callback_foreach,
 507                                 sidebar_links);
 508
 509         g_signal_handler_unblock (selection, sidebar_links->priv->selection_id);
 510         g_signal_handler_unblock (sidebar_links->priv->tree_view, sidebar_links->priv->row_activated_id);
 511 }
 512
 513 static void
 514 row_activated_callback                  (GtkTreeView *treeview,
 515                                          GtkTreePath *arg1,
 516                                          GtkTreeViewColumn *arg2,
 517                                          gpointer user_data)
 518 {
 519         if (gtk_tree_view_row_expanded (GTK_TREE_VIEW (treeview), arg1)) {
 520                     gtk_tree_view_collapse_row (GTK_TREE_VIEW (treeview), arg1);
 521         } else {
 522                     gtk_tree_view_expand_row (GTK_TREE_VIEW (treeview), arg1, FALSE);
 523         }
 524
 525         return;
 526 }
 527
 528 static void
 529 expand_open_links (GtkTreeView *tree_view, GtkTreeModel *model, GtkTreeIter *parent)
 530 {
 531         GtkTreeIter iter;
 532         EvLink *link;
 533         gboolean expand;
 534
 535         if (gtk_tree_model_iter_children (model, &iter, parent)) {
 536                 do {
 537                         gtk_tree_model_get (model, &iter,
 538                                             EV_DOCUMENT_LINKS_COLUMN_LINK, &link,
 539                                             EV_DOCUMENT_LINKS_COLUMN_EXPAND, &expand,
 540                                             -1);
 541                         if (expand) {
 542                                 GtkTreePath *path;
 543
 544                                 path = gtk_tree_model_get_path (model, &iter);
 545                                 gtk_tree_view_expand_row (tree_view, path, FALSE);
 546                                 gtk_tree_path_free (path);
 547                         }
 548
 549                         expand_open_links (tree_view, model, &iter);
 550                 } while (gtk_tree_model_iter_next (model, &iter));
 551         }
 552 }
 553
 554 static void
 555 job_finished_callback (EvJobLinks     *job,
 556                        EvSidebarLinks *sidebar_links)
 557 {
 558         EvSidebarLinksPrivate *priv;
 559         GtkTreeSelection *selection;
 560
 561         priv = sidebar_links->priv;
 562
 563         priv->model = g_object_ref (job->model);
 564         g_object_notify (G_OBJECT (sidebar_links), "model");
 565
 566         gtk_tree_view_set_model (GTK_TREE_VIEW (priv->tree_view), job->model);
 567         g_object_unref (job);
 568         priv->job = NULL;
 569
 570         expand_open_links (GTK_TREE_VIEW (priv->tree_view), priv->model, NULL);
 571
 572         selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (priv->tree_view));
 573         gtk_tree_selection_set_mode (selection, GTK_SELECTION_SINGLE);
 574         priv->selection_id = g_signal_connect (selection, "changed",
 575                                                G_CALLBACK (selection_changed_callback),
 576                                                sidebar_links);
 577         priv->page_changed_id = g_signal_connect (priv->page_cache, "page-changed",
 578                                                   G_CALLBACK (update_page_callback),
 579                                                   sidebar_links);
 580         priv->row_activated_id = g_signal_connect (G_OBJECT (priv->tree_view), "row-activated",
 581                                                     G_CALLBACK (row_activated_callback), sidebar_links);
 582         update_page_callback (priv->page_cache,
 583                               ev_page_cache_get_current_page (priv->page_cache),
 584                               sidebar_links);
 585
 586 }
 587
 588 static void
 589 ev_sidebar_links_set_document (EvSidebarPage  *sidebar_page,
 590                                EvDocument     *document)
 591 {
 592         EvSidebarLinks *sidebar_links;
 593         EvSidebarLinksPrivate *priv;
 594
 595         g_return_if_fail (EV_IS_SIDEBAR_PAGE (sidebar_page));
 596         g_return_if_fail (EV_IS_DOCUMENT (document));
 597
 598         sidebar_links = EV_SIDEBAR_LINKS (sidebar_page);
 599
 600         priv = sidebar_links->priv;
 601
 602         if (priv->document) {
 603                 gtk_tree_view_set_model (GTK_TREE_VIEW (priv->tree_view), NULL);
 604                 g_object_unref (priv->document);
 605         }
 606
 607         priv->document = g_object_ref (document);
 608         priv->page_cache = ev_page_cache_get (document);
 609
 610         if (priv->job) {
 611                 g_signal_handlers_disconnect_by_func (priv->job,
 612                                                       job_finished_callback,
 613                                                       sidebar_links);
 614                 g_object_unref (priv->job);
 615         }
 616
 617         priv->job = ev_job_links_new (document);
 618         g_signal_connect (priv->job,
 619                           "finished",
 620                           G_CALLBACK (job_finished_callback),
 621                           sidebar_links);
 622         /* The priority doesn't matter for this job */
 623         ev_job_queue_add_job (priv->job, EV_JOB_PRIORITY_LOW);
 624 }
 625
 626 static gboolean
 627 ev_sidebar_links_support_document (EvSidebarPage  *sidebar_page,
 628                                    EvDocument *document)
 629 {
 630         return (EV_IS_DOCUMENT_LINKS (document) &&
 631                     ev_document_links_has_document_links (EV_DOCUMENT_LINKS (document)));
 632 }
 633
 634 static const gchar*
 635 ev_sidebar_links_get_label (EvSidebarPage *sidebar_page)
 636 {
 637     return _("Index");
 638 }
 639
 640 static void
 641 ev_sidebar_links_page_iface_init (EvSidebarPageIface *iface)
 642 {
 643         iface->support_document = ev_sidebar_links_support_document;
 644         iface->set_document = ev_sidebar_links_set_document;
 645         iface->get_label = ev_sidebar_links_get_label;
 646 }
 647