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 enum {
  59         LINK_ACTIVATED,
  60         N_SIGNALS
  61 };
  62
  63 static void links_page_num_func                         (GtkTreeViewColumn *tree_column,
  64                                                          GtkCellRenderer   *cell,
  65                                                          GtkTreeModel      *tree_model,
  66                                                          GtkTreeIter       *iter,
  67                                                          EvSidebarLinks    *sidebar_links);
  68 static void update_page_callback                        (EvPageCache       *page_cache,
  69                                                          gint               current_page,
  70                                                          EvSidebarLinks    *sidebar_links);
  71 static void row_activated_callback                      (GtkTreeView *treeview,
  72                                                          GtkTreePath *arg1,
  73                                                          GtkTreeViewColumn *arg2,
  74                                                          gpointer user_data);
  75 static void job_finished_callback                       (EvJobLinks     *job,
  76                                                          EvSidebarLinks *sidebar_links);
  77 static void ev_sidebar_links_page_iface_init            (EvSidebarPageIface *iface);
  78 static void ev_sidebar_links_set_document               (EvSidebarPage  *sidebar_page,
  79                                                          EvDocument     *document);
  80 static gboolean ev_sidebar_links_support_document       (EvSidebarPage  *sidebar_page,
  81                                                          EvDocument     *document);
  82 static const gchar* ev_sidebar_links_get_label          (EvSidebarPage *sidebar_page);
  83
  84 static guint signals[N_SIGNALS];
  85
  86 G_DEFINE_TYPE_EXTENDED (EvSidebarLinks,
  87                         ev_sidebar_links,
  88                         GTK_TYPE_VBOX,
  89                         0,
  90                         G_IMPLEMENT_INTERFACE (EV_TYPE_SIDEBAR_PAGE,
  91                                                ev_sidebar_links_page_iface_init))
  92
  93
  94 #define EV_SIDEBAR_LINKS_GET_PRIVATE(object) \
  95         (G_TYPE_INSTANCE_GET_PRIVATE ((object), EV_TYPE_SIDEBAR_LINKS, EvSidebarLinksPrivate))
  96
  97 static void
  98 ev_sidebar_links_set_property (GObject      *object,
  99                                guint         prop_id,
 100                                const GValue *value,
 101                                GParamSpec   *pspec)
 102 {
 103         EvSidebarLinks *ev_sidebar_links;
 104         GtkTreeModel *model;
 105
 106         ev_sidebar_links = EV_SIDEBAR_LINKS (object);
 107
 108         switch (prop_id)
 109         {
 110         case PROP_MODEL:
 111                 model = ev_sidebar_links->priv->model;
 112                 ev_sidebar_links->priv->model = GTK_TREE_MODEL (g_value_dup_object (value));
 113                 if (model)
 114                         g_object_unref (model);
 115                 break;
 116         default:
 117                 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 118                 break;
 119         }
 120 }
 121
 122 static void
 123 ev_sidebar_links_get_property (GObject    *object,
 124                                guint       prop_id,
 125                                GValue     *value,
 126                                GParamSpec *pspec)
 127 {
 128         EvSidebarLinks *ev_sidebar_links;
 129
 130         ev_sidebar_links = EV_SIDEBAR_LINKS (object);
 131
 132         switch (prop_id)
 133         {
 134         case PROP_MODEL:
 135                 g_value_set_object (value, ev_sidebar_links->priv->model);
 136                 break;
 137         case PROP_WIDGET:
 138                 g_value_set_object (value, ev_sidebar_links->priv->tree_view);
 139                 break;
 140         default:
 141                 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 142                 break;
 143         }
 144 }
 145
 146 static void
 147 ev_sidebar_links_dispose (GObject *object)
 148 {
 149         EvSidebarLinks *sidebar = EV_SIDEBAR_LINKS (object);
 150
 151         if (sidebar->priv->job) {
 152                 g_signal_handlers_disconnect_by_func (sidebar->priv->job,
 153                                                       job_finished_callback, sidebar);
 154                 ev_job_queue_remove_job (sidebar->priv->job);
 155                 g_object_unref (sidebar->priv->job);
 156                 sidebar->priv->job = NULL;
 157         }
 158
 159         if (sidebar->priv->model) {
 160                 g_object_unref (sidebar->priv->model);
 161                 sidebar->priv->model = NULL;
 162         }
 163
 164         if (sidebar->priv->document) {
 165                 g_object_unref (sidebar->priv->document);
 166                 sidebar->priv->document = NULL;
 167                 sidebar->priv->page_cache = NULL;
 168         }
 169
 170
 171         G_OBJECT_CLASS (ev_sidebar_links_parent_class)->dispose (object);
 172 }
 173
 174 static void
 175 ev_sidebar_links_class_init (EvSidebarLinksClass *ev_sidebar_links_class)
 176 {
 177         GObjectClass *g_object_class;
 178
 179         g_object_class = G_OBJECT_CLASS (ev_sidebar_links_class);
 180
 181         g_object_class->set_property = ev_sidebar_links_set_property;
 182         g_object_class->get_property = ev_sidebar_links_get_property;
 183         g_object_class->dispose = ev_sidebar_links_dispose;
 184
 185         signals[LINK_ACTIVATED] = g_signal_new ("link-activated",
 186                          G_TYPE_FROM_CLASS (g_object_class),
 187                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
 188                          G_STRUCT_OFFSET (EvSidebarLinksClass, link_activated),
 189                          NULL, NULL,
 190                          g_cclosure_marshal_VOID__OBJECT,
 191                          G_TYPE_NONE, 1, G_TYPE_OBJECT);
 192
 193         g_object_class_install_property (g_object_class,
 194                                          PROP_MODEL,
 195                                          g_param_spec_object ("model",
 196                                                               "Model",
 197                                                               "Current Model",
 198                                                               GTK_TYPE_TREE_MODEL,
 199                                                               G_PARAM_READWRITE));
 200         g_object_class_override_property (g_object_class,
 201                                           PROP_WIDGET,
 202                                           "main-widget");
 203
 204         g_type_class_add_private (g_object_class, sizeof (EvSidebarLinksPrivate));
 205 }
 206
 207 static void
 208 selection_changed_callback (GtkTreeSelection   *selection,
 209                             EvSidebarLinks     *ev_sidebar_links)
 210 {
 211         EvDocument *document;
 212         GtkTreeModel *model;
 213         GtkTreeIter iter;
 214
 215         g_return_if_fail (EV_IS_SIDEBAR_LINKS (ev_sidebar_links));
 216
 217         document = EV_DOCUMENT (ev_sidebar_links->priv->document);
 218         g_return_if_fail (ev_sidebar_links->priv->document != NULL);
 219
 220         if (gtk_tree_selection_get_selected (selection, &model, &iter)) {
 221                 EvLink *link;
 222
 223                 gtk_tree_model_get (model, &iter,
 224                                     EV_DOCUMENT_LINKS_COLUMN_LINK, &link,
 225                                     -1);
 226
 227                 if (link == NULL)
 228                         return;
 229
 230                 g_signal_handler_block (ev_sidebar_links->priv->page_cache,
 231                                         ev_sidebar_links->priv->page_changed_id);
 232                 g_signal_emit (ev_sidebar_links, signals[LINK_ACTIVATED], 0, link);
 233                 g_signal_handler_unblock (ev_sidebar_links->priv->page_cache,
 234                                           ev_sidebar_links->priv->page_changed_id);
 235
 236                 g_object_unref (link);
 237         }
 238 }
 239
 240 static GtkTreeModel *
 241 create_loading_model (void)
 242 {
 243         GtkTreeModel *retval;
 244         GtkTreeIter iter;
 245         gchar *markup;
 246
 247         /* Creates a fake model to indicate that we're loading */
 248         retval = (GtkTreeModel *)gtk_list_store_new (EV_DOCUMENT_LINKS_COLUMN_NUM_COLUMNS,
 249                                                      G_TYPE_STRING,
 250                                                      G_TYPE_OBJECT,
 251                                                      G_TYPE_BOOLEAN);
 252
 253         gtk_list_store_append (GTK_LIST_STORE (retval), &iter);
 254         markup = g_strdup_printf ("<span size=\"larger\" style=\"italic\">%s</span>", _("Loading..."));
 255         gtk_list_store_set (GTK_LIST_STORE (retval), &iter,
 256                             EV_DOCUMENT_LINKS_COLUMN_MARKUP, markup,
 257                             EV_DOCUMENT_LINKS_COLUMN_EXPAND, FALSE,
 258                             EV_DOCUMENT_LINKS_COLUMN_LINK, NULL,
 259                             -1);
 260         g_free (markup);
 261
 262         return retval;
 263 }
 264
 265 static gint
 266 get_page_from_link (EvLink *link)
 267 {
 268         EvLinkAction *action;
 269         EvLinkDest *dest;
 270
 271         action = ev_link_get_action (link);
 272         if (!action)
 273                 return -1;
 274
 275         if (ev_link_action_get_action_type (action) !=
 276             EV_LINK_ACTION_TYPE_GOTO_DEST)
 277                 return -1;
 278
 279         dest = ev_link_action_get_dest (action);
 280         if (dest)
 281                 return ev_link_dest_get_page (dest);
 282
 283         return -1;
 284 }
 285
 286 static void
 287 print_section_cb (GtkWidget *menuitem, EvSidebarLinks *sidebar)
 288 {
 289         GtkWidget *window;
 290         GtkTreeSelection *selection;
 291         GtkTreeModel *model;
 292         GtkTreeIter iter;
 293
 294         selection = gtk_tree_view_get_selection
 295                 (GTK_TREE_VIEW (sidebar->priv->tree_view));
 296
 297         if (gtk_tree_selection_get_selected (selection, &model, &iter)) {
 298                 EvLink *link;
 299                 int first_page, last_page = -1;
 300
 301                 gtk_tree_model_get (model, &iter,
 302                                     EV_DOCUMENT_LINKS_COLUMN_LINK, &link,
 303                                     -1);
 304
 305                 if (!link)
 306                         return;
 307
 308                 first_page = get_page_from_link (link);
 309                 if (first_page == -1) {
 310                         g_object_unref (link);
 311                         return;
 312                 }
 313
 314                 first_page++;
 315                 g_object_unref (link);
 316
 317                 if (gtk_tree_model_iter_next (model, &iter)) {
 318                         gtk_tree_model_get (model, &iter,
 319                                             EV_DOCUMENT_LINKS_COLUMN_LINK, &link,
 320                                             -1);
 321
 322                         if (link) {
 323                                 last_page = get_page_from_link (link);
 324                                 g_object_unref (link);
 325                         }
 326                 } else {
 327                         last_page = ev_page_cache_get_n_pages (sidebar->priv->page_cache);
 328                 }
 329
 330                 if (last_page == -1)
 331                         last_page = ev_page_cache_get_n_pages (sidebar->priv->page_cache);
 332
 333                 window = gtk_widget_get_toplevel (GTK_WIDGET (sidebar));
 334                 if (EV_IS_WINDOW (window)) {
 335 #ifdef WITH_PRINT
 336                         ev_window_print_range (EV_WINDOW (window),
 337                                                first_page, last_page);
 338 #endif
 339                 }
 340         }
 341 }
 342
 343 static GtkMenu *
 344 build_popup_menu (EvSidebarLinks *sidebar)
 345 {
 346         GtkWidget *menu;
 347         GtkWidget *item;
 348
 349         menu = gtk_menu_new ();
 350         item = gtk_image_menu_item_new_from_stock (GTK_STOCK_PRINT, NULL);
 351         gtk_label_set_label (GTK_LABEL (GTK_BIN (item)->child), _("Print..."));
 352         gtk_widget_show (item);
 353         gtk_menu_shell_append (GTK_MENU_SHELL (menu), item);
 354         g_signal_connect (item, "activate",
 355                           G_CALLBACK (print_section_cb), sidebar);
 356
 357         return GTK_MENU (menu);
 358 }
 359
 360 static void
 361 popup_menu_cb (GtkWidget *treeview, EvSidebarLinks *sidebar)
 362 {
 363         GtkMenu *menu = build_popup_menu (sidebar);
 364
 365         gtk_menu_popup (menu, NULL, NULL,
 366                         ev_gui_menu_position_tree_selection,
 367                         sidebar->priv->tree_view, 0,
 368                         gtk_get_current_event_time ());
 369         gtk_menu_shell_select_first (GTK_MENU_SHELL (menu), FALSE);
 370 }
 371
 372 static gboolean
 373 button_press_cb (GtkWidget *treeview,
 374                  GdkEventButton *event,
 375                  EvSidebarLinks *sidebar)
 376 {
 377         GtkTreePath *path = NULL;
 378
 379         if (event->button == 3) {
 380                 if (gtk_tree_view_get_path_at_pos (GTK_TREE_VIEW (treeview),
 381                                                    event->x,
 382                                                    event->y,
 383                                                    &path,
 384                                                    NULL, NULL, NULL)) {
 385                         gtk_tree_view_set_cursor (GTK_TREE_VIEW (treeview),
 386                                                   path, NULL, FALSE);
 387                         gtk_menu_popup (build_popup_menu (sidebar), NULL,
 388                                         NULL, NULL, NULL, event->button,
 389                                         gtk_get_current_event_time ());
 390                         gtk_tree_path_free (path);
 391
 392                         return TRUE;
 393                 }
 394         }
 395
 396         return FALSE;
 397 }
 398
 399
 400 static void
 401 ev_sidebar_links_construct (EvSidebarLinks *ev_sidebar_links)
 402 {
 403         EvSidebarLinksPrivate *priv;
 404         GtkWidget *swindow;
 405         GtkTreeViewColumn *column;
 406         GtkCellRenderer *renderer;
 407         GtkTreeSelection *selection;
 408         GtkTreeModel *loading_model;
 409
 410         priv = ev_sidebar_links->priv;
 411
 412         swindow = gtk_scrolled_window_new (NULL, NULL);
 413
 414         gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (swindow),
 415                                         GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);
 416         gtk_scrolled_window_set_shadow_type (GTK_SCROLLED_WINDOW (swindow),
 417                                              GTK_SHADOW_IN);
 418
 419         /* Create tree view */
 420         loading_model = create_loading_model ();
 421         priv->tree_view = gtk_tree_view_new_with_model (loading_model);
 422         g_object_unref (loading_model);
 423
 424         selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (priv->tree_view));
 425         gtk_tree_selection_set_mode (selection, GTK_SELECTION_NONE);
 426         gtk_tree_view_set_headers_visible (GTK_TREE_VIEW (priv->tree_view), FALSE);
 427         gtk_container_add (GTK_CONTAINER (swindow), priv->tree_view);
 428
 429         gtk_box_pack_start (GTK_BOX (ev_sidebar_links), swindow, TRUE, TRUE, 0);
 430         gtk_widget_show_all (GTK_WIDGET (ev_sidebar_links));
 431
 432         column = gtk_tree_view_column_new ();
 433         gtk_tree_view_column_set_expand (GTK_TREE_VIEW_COLUMN (column), TRUE);
 434         gtk_tree_view_append_column (GTK_TREE_VIEW (priv->tree_view), column);
 435
 436         renderer = (GtkCellRenderer*)
 437                 g_object_new (GTK_TYPE_CELL_RENDERER_TEXT,
 438                               "ellipsize", PANGO_ELLIPSIZE_END,
 439                               NULL);
 440         gtk_tree_view_column_pack_start (GTK_TREE_VIEW_COLUMN (column), renderer, TRUE);
 441         gtk_tree_view_column_set_attributes (GTK_TREE_VIEW_COLUMN (column), renderer,
 442                                              "markup", EV_DOCUMENT_LINKS_COLUMN_MARKUP,
 443                                              NULL);
 444
 445
 446         renderer = gtk_cell_renderer_text_new ();
 447         gtk_tree_view_column_pack_end (GTK_TREE_VIEW_COLUMN (column), renderer, FALSE);
 448         gtk_tree_view_column_set_cell_data_func (GTK_TREE_VIEW_COLUMN (column), renderer,
 449                                                  (GtkTreeCellDataFunc) links_page_num_func,
 450                                                  ev_sidebar_links, NULL);
 451
 452         g_signal_connect (GTK_TREE_VIEW (priv->tree_view),
 453                           "button_press_event",
 454                           G_CALLBACK (button_press_cb),
 455                           ev_sidebar_links);
 456         g_signal_connect (GTK_TREE_VIEW (priv->tree_view),
 457                           "popup_menu",
 458                           G_CALLBACK (popup_menu_cb),
 459                           ev_sidebar_links);
 460 }
 461
 462 static void
 463 ev_sidebar_links_init (EvSidebarLinks *ev_sidebar_links)
 464 {
 465         ev_sidebar_links->priv = EV_SIDEBAR_LINKS_GET_PRIVATE (ev_sidebar_links);
 466
 467         ev_sidebar_links_construct (ev_sidebar_links);
 468 }
 469
 470 static void
 471 links_page_num_func (GtkTreeViewColumn *tree_column,
 472                      GtkCellRenderer   *cell,
 473                      GtkTreeModel      *tree_model,
 474                      GtkTreeIter       *iter,
 475                      EvSidebarLinks    *sidebar_links)
 476 {
 477         EvLink *link;
 478         gint page;
 479
 480         gtk_tree_model_get (tree_model, iter,
 481                             EV_DOCUMENT_LINKS_COLUMN_LINK, &link,
 482                             -1);
 483
 484         if (!link) {
 485                 g_object_set (cell,
 486                               "visible", FALSE,
 487                               NULL);
 488                 return;
 489         }
 490
 491         page = get_page_from_link (link);
 492
 493         if (page >= 0) {
 494                 gchar *page_label;
 495                 gchar *page_string;
 496
 497                 page_label = ev_page_cache_get_page_label (sidebar_links->priv->page_cache,
 498                                                            page);
 499                 page_string = g_markup_printf_escaped ("<i>%s</i>", page_label);
 500
 501                 g_object_set (cell,
 502                               "markup", page_string,
 503                               "visible", TRUE,
 504                               NULL);
 505
 506                 g_free (page_label);
 507                 g_free (page_string);
 508         } else {
 509                 g_object_set (cell,
 510                               "visible", FALSE,
 511                               NULL);
 512         }
 513
 514         g_object_unref (link);
 515 }
 516
 517 /* Public Functions */
 518
 519 GtkWidget *
 520 ev_sidebar_links_new (void)
 521 {
 522         GtkWidget *ev_sidebar_links;
 523
 524         ev_sidebar_links = g_object_new (EV_TYPE_SIDEBAR_LINKS, NULL);
 525
 526         return ev_sidebar_links;
 527 }
 528
 529 static gboolean
 530 update_page_callback_foreach (GtkTreeModel *model,
 531                               GtkTreePath  *path,
 532                               GtkTreeIter  *iter,
 533                               gpointer      data)
 534 {
 535         EvSidebarLinks *sidebar_links = (data);
 536         EvLink *link;
 537
 538         gtk_tree_model_get (model, iter,
 539                             EV_DOCUMENT_LINKS_COLUMN_LINK, &link,
 540                             -1);
 541
 542         if (link) {
 543                 int current_page;
 544                 int dest_page;
 545
 546                 dest_page = get_page_from_link (link);
 547                 g_object_unref (link);
 548
 549                 current_page = ev_page_cache_get_current_page (sidebar_links->priv->page_cache);
 550
 551                 if (dest_page == current_page) {
 552                         GtkTreeSelection *selection;
 553
 554                         selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (sidebar_links->priv->tree_view));
 555                         gtk_tree_view_expand_to_path (GTK_TREE_VIEW (sidebar_links->priv->tree_view),
 556                                                       path);
 557                         gtk_tree_selection_select_path (selection, path);
 558
 559                         return TRUE;
 560                 }
 561         }
 562
 563         return FALSE;
 564 }
 565
 566 static void
 567 update_page_callback (EvPageCache    *page_cache,
 568                       gint            current_page,
 569                       EvSidebarLinks *sidebar_links)
 570 {
 571         GtkTreeSelection *selection;
 572         GtkTreeModel *model;
 573         GtkTreeIter iter;
 574
 575         selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (sidebar_links->priv->tree_view));
 576
 577         if (gtk_tree_selection_get_selected (selection, &model, &iter)) {
 578                 EvLink *link;
 579
 580                 gtk_tree_model_get (model, &iter,
 581                                     EV_DOCUMENT_LINKS_COLUMN_LINK, &link,
 582                                     -1);
 583                 if (link) {
 584                         gint current_page;
 585                         gint dest_page;
 586
 587                         dest_page = get_page_from_link (link);
 588                         g_object_unref (link);
 589
 590                         current_page = ev_page_cache_get_current_page (sidebar_links->priv->page_cache);
 591                         if (dest_page == current_page)
 592                                 return;
 593                 }
 594         }
 595
 596         /* We go through the tree linearly looking for the first page that
 597          * matches.  This is pretty inefficient.  We can do something neat with
 598          * a GtkTreeModelSort here to make it faster, if it turns out to be
 599          * slow.
 600          */
 601         g_signal_handler_block (selection, sidebar_links->priv->selection_id);
 602         g_signal_handler_block (sidebar_links->priv->tree_view, sidebar_links->priv->row_activated_id);
 603
 604         gtk_tree_model_foreach (model,
 605                                 update_page_callback_foreach,
 606                                 sidebar_links);
 607
 608
 609         g_signal_handler_unblock (selection, sidebar_links->priv->selection_id);
 610         g_signal_handler_unblock (sidebar_links->priv->tree_view, sidebar_links->priv->row_activated_id);
 611 }
 612
 613 static void
 614 row_activated_callback                  (GtkTreeView *treeview,
 615                                          GtkTreePath *arg1,
 616                                          GtkTreeViewColumn *arg2,
 617                                          gpointer user_data)
 618 {
 619         if (gtk_tree_view_row_expanded (GTK_TREE_VIEW (treeview), arg1)) {
 620                     gtk_tree_view_collapse_row (GTK_TREE_VIEW (treeview), arg1);
 621         } else {
 622                     gtk_tree_view_expand_row (GTK_TREE_VIEW (treeview), arg1, FALSE);
 623         }
 624
 625         return;
 626 }
 627
 628 static void
 629 expand_open_links (GtkTreeView *tree_view, GtkTreeModel *model, GtkTreeIter *parent)
 630 {
 631         GtkTreeIter iter;
 632         gboolean expand;
 633
 634         if (gtk_tree_model_iter_children (model, &iter, parent)) {
 635                 do {
 636                         gtk_tree_model_get (model, &iter,
 637                                             EV_DOCUMENT_LINKS_COLUMN_EXPAND, &expand,
 638                                             -1);
 639                         if (expand) {
 640                                 GtkTreePath *path;
 641
 642                                 path = gtk_tree_model_get_path (model, &iter);
 643                                 gtk_tree_view_expand_row (tree_view, path, FALSE);
 644                                 gtk_tree_path_free (path);
 645                         }
 646
 647                         expand_open_links (tree_view, model, &iter);
 648                 } while (gtk_tree_model_iter_next (model, &iter));
 649         }
 650 }
 651
 652 static void
 653 job_finished_callback (EvJobLinks     *job,
 654                        EvSidebarLinks *sidebar_links)
 655 {
 656         EvSidebarLinksPrivate *priv;
 657         GtkTreeSelection *selection;
 658
 659         priv = sidebar_links->priv;
 660
 661         priv->model = job->model;
 662         g_object_notify (G_OBJECT (sidebar_links), "model");
 663
 664         gtk_tree_view_set_model (GTK_TREE_VIEW (priv->tree_view), job->model);
 665
 666         g_object_unref (job);
 667         priv->job = NULL;
 668
 669         expand_open_links (GTK_TREE_VIEW (priv->tree_view), priv->model, NULL);
 670
 671         selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (priv->tree_view));
 672         gtk_tree_selection_set_mode (selection, GTK_SELECTION_SINGLE);
 673         priv->selection_id = g_signal_connect (selection, "changed",
 674                                                G_CALLBACK (selection_changed_callback),
 675                                                sidebar_links);
 676         priv->page_changed_id = g_signal_connect (priv->page_cache, "page-changed",
 677                                                   G_CALLBACK (update_page_callback),
 678                                                   sidebar_links);
 679         priv->row_activated_id = g_signal_connect (G_OBJECT (priv->tree_view), "row-activated",
 680                                                     G_CALLBACK (row_activated_callback), sidebar_links);
 681         update_page_callback (priv->page_cache,
 682                               ev_page_cache_get_current_page (priv->page_cache),
 683                               sidebar_links);
 684
 685 }
 686
 687 static void
 688 ev_sidebar_links_set_document (EvSidebarPage  *sidebar_page,
 689                                EvDocument     *document)
 690 {
 691         EvSidebarLinks *sidebar_links;
 692         EvSidebarLinksPrivate *priv;
 693
 694         g_return_if_fail (EV_IS_SIDEBAR_PAGE (sidebar_page));
 695         g_return_if_fail (EV_IS_DOCUMENT (document));
 696
 697         sidebar_links = EV_SIDEBAR_LINKS (sidebar_page);
 698
 699         priv = sidebar_links->priv;
 700
 701         if (priv->document) {
 702                 gtk_tree_view_set_model (GTK_TREE_VIEW (priv->tree_view), NULL);
 703                 g_object_unref (priv->document);
 704         }
 705
 706         priv->document = g_object_ref (document);
 707         priv->page_cache = ev_page_cache_get (document);
 708
 709         if (priv->job) {
 710                 g_signal_handlers_disconnect_by_func (priv->job,
 711                                                       job_finished_callback,
 712                                                       sidebar_links);
 713                 g_object_unref (priv->job);
 714         }
 715
 716         priv->job = ev_job_links_new (document);
 717         g_signal_connect (priv->job,
 718                           "finished",
 719                           G_CALLBACK (job_finished_callback),
 720                           sidebar_links);
 721         /* The priority doesn't matter for this job */
 722         ev_job_queue_add_job (priv->job, EV_JOB_PRIORITY_LOW);
 723 }
 724
 725 static gboolean
 726 ev_sidebar_links_support_document (EvSidebarPage  *sidebar_page,
 727                                    EvDocument *document)
 728 {
 729         return (EV_IS_DOCUMENT_LINKS (document) &&
 730                     ev_document_links_has_document_links (EV_DOCUMENT_LINKS (document)));
 731 }
 732
 733 static const gchar*
 734 ev_sidebar_links_get_label (EvSidebarPage *sidebar_page)
 735 {
 736     return _("Index");
 737 }
 738
 739 static void
 740 ev_sidebar_links_page_iface_init (EvSidebarPageIface *iface)
 741 {
 742         iface->support_document = ev_sidebar_links_support_document;
 743         iface->set_document = ev_sidebar_links_set_document;
 744         iface->get_label = ev_sidebar_links_get_label;
 745 }
 746