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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  21  */
  22
  23 #ifdef HAVE_CONFIG_H
  24 #include "config.h"
  25 #endif
  26
  27 #include <string.h>
  28
  29 #include <glib/gi18n.h>
  30 #include <gtk/gtk.h>
  31
  32 #include "ev-document-links.h"
  33 #include "ev-job-scheduler.h"
  34 #include "ev-sidebar-links.h"
  35 #include "ev-sidebar-page.h"
  36 #include "ev-window.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         EvDocumentModel *doc_model;
  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 update_page_callback                        (EvSidebarLinks    *sidebar_links,
  64                                                          gint               old_page,
  65                                                          gint               current_page);
  66 static void row_activated_callback                      (GtkTreeView *treeview,
  67                                                          GtkTreePath *arg1,
  68                                                          GtkTreeViewColumn *arg2,
  69                                                          gpointer user_data);
  70 static void ev_sidebar_links_set_links_model            (EvSidebarLinks *links,
  71                                                          GtkTreeModel   *model);
  72 static void job_finished_callback                       (EvJobLinks     *job,
  73                                                          EvSidebarLinks *sidebar_links);
  74 static void ev_sidebar_links_set_current_page           (EvSidebarLinks *sidebar_links,
  75                                                          gint            current_page);
  76 static void ev_sidebar_links_page_iface_init            (EvSidebarPageInterface *iface);
  77 static gboolean ev_sidebar_links_support_document       (EvSidebarPage  *sidebar_page,
  78                                                          EvDocument     *document);
  79 static const gchar* ev_sidebar_links_get_label          (EvSidebarPage *sidebar_page);
  80
  81 static guint signals[N_SIGNALS];
  82
  83 G_DEFINE_TYPE_EXTENDED (EvSidebarLinks,
  84                         ev_sidebar_links,
  85                         GTK_TYPE_VBOX,
  86                         0,
  87                         G_IMPLEMENT_INTERFACE (EV_TYPE_SIDEBAR_PAGE,
  88                                                ev_sidebar_links_page_iface_init))
  89
  90
  91 #define EV_SIDEBAR_LINKS_GET_PRIVATE(object) \
  92         (G_TYPE_INSTANCE_GET_PRIVATE ((object), EV_TYPE_SIDEBAR_LINKS, EvSidebarLinksPrivate))
  93
  94 static void
  95 ev_sidebar_links_set_property (GObject      *object,
  96                                guint         prop_id,
  97                                const GValue *value,
  98                                GParamSpec   *pspec)
  99 {
 100         EvSidebarLinks *ev_sidebar_links = EV_SIDEBAR_LINKS (object);
 101
 102         switch (prop_id)
 103         {
 104         case PROP_MODEL:
 105                 ev_sidebar_links_set_links_model (ev_sidebar_links, g_value_get_object (value));
 106                 break;
 107         default:
 108                 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 109                 break;
 110         }
 111 }
 112
 113 static void
 114 ev_sidebar_links_get_property (GObject    *object,
 115                                guint       prop_id,
 116                                GValue     *value,
 117                                GParamSpec *pspec)
 118 {
 119         EvSidebarLinks *ev_sidebar_links;
 120
 121         ev_sidebar_links = EV_SIDEBAR_LINKS (object);
 122
 123         switch (prop_id)
 124         {
 125         case PROP_MODEL:
 126                 g_value_set_object (value, ev_sidebar_links->priv->model);
 127                 break;
 128         case PROP_WIDGET:
 129                 g_value_set_object (value, ev_sidebar_links->priv->tree_view);
 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->job) {
 143                 g_signal_handlers_disconnect_by_func (sidebar->priv->job,
 144                                                       job_finished_callback, sidebar);
 145                 ev_job_cancel (sidebar->priv->job);
 146                 g_object_unref (sidebar->priv->job);
 147                 sidebar->priv->job = NULL;
 148         }
 149
 150         if (sidebar->priv->model) {
 151                 g_object_unref (sidebar->priv->model);
 152                 sidebar->priv->model = NULL;
 153         }
 154
 155         if (sidebar->priv->document) {
 156                 g_object_unref (sidebar->priv->document);
 157                 sidebar->priv->document = NULL;
 158                 sidebar->priv->doc_model = NULL;
 159         }
 160
 161         G_OBJECT_CLASS (ev_sidebar_links_parent_class)->dispose (object);
 162 }
 163
 164 static void
 165 ev_sidebar_links_map (GtkWidget *widget)
 166 {
 167         EvSidebarLinks *links;
 168
 169         links = EV_SIDEBAR_LINKS (widget);
 170
 171         GTK_WIDGET_CLASS (ev_sidebar_links_parent_class)->map (widget);
 172
 173         if (links->priv->model) {
 174                 ev_sidebar_links_set_current_page (links,
 175                                                    ev_document_model_get_page (links->priv->doc_model));
 176         }
 177 }
 178
 179 static void
 180 ev_sidebar_links_class_init (EvSidebarLinksClass *ev_sidebar_links_class)
 181 {
 182         GObjectClass   *g_object_class;
 183         GtkWidgetClass *widget_class;
 184
 185         g_object_class = G_OBJECT_CLASS (ev_sidebar_links_class);
 186         widget_class = GTK_WIDGET_CLASS (ev_sidebar_links_class);
 187
 188         g_object_class->set_property = ev_sidebar_links_set_property;
 189         g_object_class->get_property = ev_sidebar_links_get_property;
 190         g_object_class->dispose = ev_sidebar_links_dispose;
 191
 192         widget_class->map = ev_sidebar_links_map;
 193
 194         signals[LINK_ACTIVATED] = g_signal_new ("link-activated",
 195                          G_TYPE_FROM_CLASS (g_object_class),
 196                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
 197                          G_STRUCT_OFFSET (EvSidebarLinksClass, link_activated),
 198                          NULL, NULL,
 199                          g_cclosure_marshal_VOID__OBJECT,
 200                          G_TYPE_NONE, 1, G_TYPE_OBJECT);
 201
 202         g_object_class_install_property (g_object_class,
 203                                          PROP_MODEL,
 204                                          g_param_spec_object ("model",
 205                                                               "Model",
 206                                                               "Current Model",
 207                                                               GTK_TYPE_TREE_MODEL,
 208                                                               G_PARAM_READWRITE));
 209         g_object_class_override_property (g_object_class,
 210                                           PROP_WIDGET,
 211                                           "main-widget");
 212
 213         g_type_class_add_private (g_object_class, sizeof (EvSidebarLinksPrivate));
 214 }
 215
 216 static void
 217 selection_changed_callback (GtkTreeSelection   *selection,
 218                             EvSidebarLinks     *ev_sidebar_links)
 219 {
 220         EvDocument *document;
 221         GtkTreeModel *model;
 222         GtkTreeIter iter;
 223
 224         document = EV_DOCUMENT (ev_sidebar_links->priv->document);
 225         g_return_if_fail (ev_sidebar_links->priv->document != NULL);
 226
 227         if (gtk_tree_selection_get_selected (selection, &model, &iter)) {
 228                 EvLink *link;
 229
 230                 gtk_tree_model_get (model, &iter,
 231                                     EV_DOCUMENT_LINKS_COLUMN_LINK, &link,
 232                                     -1);
 233
 234                 if (link == NULL)
 235                         return;
 236
 237                 g_signal_handler_block (ev_sidebar_links->priv->doc_model,
 238                                         ev_sidebar_links->priv->page_changed_id);
 239                 g_signal_emit (ev_sidebar_links, signals[LINK_ACTIVATED], 0, link);
 240                 g_signal_handler_unblock (ev_sidebar_links->priv->doc_model,
 241                                           ev_sidebar_links->priv->page_changed_id);
 242
 243                 g_object_unref (link);
 244         }
 245 }
 246
 247 static GtkTreeModel *
 248 create_loading_model (void)
 249 {
 250         GtkTreeModel *retval;
 251         GtkTreeIter iter;
 252         gchar *markup;
 253
 254         /* Creates a fake model to indicate that we're loading */
 255         retval = (GtkTreeModel *)gtk_list_store_new (EV_DOCUMENT_LINKS_COLUMN_NUM_COLUMNS,
 256                                                      G_TYPE_STRING,
 257                                                      G_TYPE_OBJECT,
 258                                                      G_TYPE_BOOLEAN,
 259                                                      G_TYPE_STRING);
 260
 261         gtk_list_store_append (GTK_LIST_STORE (retval), &iter);
 262         markup = g_strdup_printf ("<span size=\"larger\" style=\"italic\">%s</span>", _("Loading…"));
 263         gtk_list_store_set (GTK_LIST_STORE (retval), &iter,
 264                             EV_DOCUMENT_LINKS_COLUMN_MARKUP, markup,
 265                             EV_DOCUMENT_LINKS_COLUMN_EXPAND, FALSE,
 266                             EV_DOCUMENT_LINKS_COLUMN_LINK, NULL,
 267                             -1);
 268         g_free (markup);
 269
 270         return retval;
 271 }
 272
 273 static void
 274 print_section_cb (GtkWidget *menuitem, EvSidebarLinks *sidebar)
 275 {
 276         GtkWidget *window;
 277         GtkTreeSelection *selection;
 278         GtkTreeModel *model;
 279         GtkTreeIter iter;
 280
 281         selection = gtk_tree_view_get_selection
 282                 (GTK_TREE_VIEW (sidebar->priv->tree_view));
 283
 284         if (gtk_tree_selection_get_selected (selection, &model, &iter)) {
 285                 EvLink *link;
 286                 int first_page, last_page = -1;
 287                 EvDocumentLinks *document_links;
 288
 289                 gtk_tree_model_get (model, &iter,
 290                                     EV_DOCUMENT_LINKS_COLUMN_LINK, &link,
 291                                     -1);
 292
 293                 if (!link)
 294                         return;
 295
 296                 document_links = EV_DOCUMENT_LINKS (sidebar->priv->document);
 297
 298                 first_page = ev_document_links_get_link_page (document_links, link);
 299                 if (first_page == -1) {
 300                         g_object_unref (link);
 301                         return;
 302                 }
 303
 304                 first_page++;
 305                 g_object_unref (link);
 306
 307                 if (gtk_tree_model_iter_next (model, &iter)) {
 308                         gtk_tree_model_get (model, &iter,
 309                                             EV_DOCUMENT_LINKS_COLUMN_LINK, &link,
 310                                             -1);
 311
 312                         if (link) {
 313                                 last_page = ev_document_links_get_link_page (document_links, link);;
 314                                 g_object_unref (link);
 315                         }
 316                 } else {
 317                         last_page = ev_document_get_n_pages (sidebar->priv->document);
 318                 }
 319
 320                 if (last_page == -1)
 321                         last_page = ev_document_get_n_pages (sidebar->priv->document);
 322
 323                 window = gtk_widget_get_toplevel (GTK_WIDGET (sidebar));
 324                 if (EV_IS_WINDOW (window)) {
 325                         ev_window_print_range (EV_WINDOW (window), first_page, last_page);
 326                 }
 327         }
 328 }
 329
 330 static GtkMenu *
 331 build_popup_menu (EvSidebarLinks *sidebar)
 332 {
 333         GtkWidget *menu;
 334         GtkWidget *item;
 335
 336         menu = gtk_menu_new ();
 337         item = gtk_image_menu_item_new_from_stock (GTK_STOCK_PRINT, NULL);
 338         gtk_label_set_label (GTK_LABEL (gtk_bin_get_child (GTK_BIN (item))), _("Print…"));
 339         gtk_widget_show (item);
 340         gtk_menu_shell_append (GTK_MENU_SHELL (menu), item);
 341         g_signal_connect (item, "activate",
 342                           G_CALLBACK (print_section_cb), sidebar);
 343
 344         return GTK_MENU (menu);
 345 }
 346
 347 static void
 348 popup_menu_cb (GtkWidget *treeview, EvSidebarLinks *sidebar)
 349 {
 350         GtkMenu *menu = build_popup_menu (sidebar);
 351
 352         gtk_menu_popup (menu, NULL, NULL,
 353                         ev_gui_menu_position_tree_selection,
 354                         sidebar->priv->tree_view, 0,
 355                         gtk_get_current_event_time ());
 356         gtk_menu_shell_select_first (GTK_MENU_SHELL (menu), FALSE);
 357 }
 358
 359 static gboolean
 360 button_press_cb (GtkWidget *treeview,
 361                  GdkEventButton *event,
 362                  EvSidebarLinks *sidebar)
 363 {
 364         GtkTreePath *path = NULL;
 365
 366         if (event->button == 3) {
 367                 if (gtk_tree_view_get_path_at_pos (GTK_TREE_VIEW (treeview),
 368                                                    event->x,
 369                                                    event->y,
 370                                                    &path,
 371                                                    NULL, NULL, NULL)) {
 372                         gtk_tree_view_set_cursor (GTK_TREE_VIEW (treeview),
 373                                                   path, NULL, FALSE);
 374                         gtk_menu_popup (build_popup_menu (sidebar), NULL,
 375                                         NULL, NULL, NULL, event->button,
 376                                         gtk_get_current_event_time ());
 377                         gtk_tree_path_free (path);
 378
 379                         return TRUE;
 380                 }
 381         }
 382
 383         return FALSE;
 384 }
 385
 386
 387 static void
 388 ev_sidebar_links_construct (EvSidebarLinks *ev_sidebar_links)
 389 {
 390         EvSidebarLinksPrivate *priv;
 391         GtkWidget *swindow;
 392         GtkTreeViewColumn *column;
 393         GtkCellRenderer *renderer;
 394         GtkTreeSelection *selection;
 395         GtkTreeModel *loading_model;
 396
 397         priv = ev_sidebar_links->priv;
 398
 399         swindow = gtk_scrolled_window_new (NULL, NULL);
 400
 401         gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (swindow),
 402                                         GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);
 403         gtk_scrolled_window_set_shadow_type (GTK_SCROLLED_WINDOW (swindow),
 404                                              GTK_SHADOW_IN);
 405
 406         /* Create tree view */
 407         loading_model = create_loading_model ();
 408         priv->tree_view = gtk_tree_view_new_with_model (loading_model);
 409         g_object_unref (loading_model);
 410
 411         selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (priv->tree_view));
 412         gtk_tree_selection_set_mode (selection, GTK_SELECTION_NONE);
 413         gtk_tree_view_set_headers_visible (GTK_TREE_VIEW (priv->tree_view), FALSE);
 414         gtk_container_add (GTK_CONTAINER (swindow), priv->tree_view);
 415
 416         gtk_box_pack_start (GTK_BOX (ev_sidebar_links), swindow, TRUE, TRUE, 0);
 417         gtk_widget_show_all (GTK_WIDGET (ev_sidebar_links));
 418
 419         column = gtk_tree_view_column_new ();
 420         gtk_tree_view_column_set_expand (GTK_TREE_VIEW_COLUMN (column), TRUE);
 421         gtk_tree_view_append_column (GTK_TREE_VIEW (priv->tree_view), column);
 422
 423         renderer = (GtkCellRenderer*)
 424                 g_object_new (GTK_TYPE_CELL_RENDERER_TEXT,
 425                               "ellipsize", PANGO_ELLIPSIZE_END,
 426                               NULL);
 427         gtk_tree_view_column_pack_start (GTK_TREE_VIEW_COLUMN (column), renderer, TRUE);
 428         gtk_tree_view_column_set_attributes (GTK_TREE_VIEW_COLUMN (column), renderer,
 429                                              "markup", EV_DOCUMENT_LINKS_COLUMN_MARKUP,
 430                                              NULL);
 431
 432
 433         renderer = gtk_cell_renderer_text_new ();
 434         gtk_tree_view_column_pack_end (GTK_TREE_VIEW_COLUMN (column), renderer, FALSE);
 435         gtk_tree_view_column_set_attributes (GTK_TREE_VIEW_COLUMN (column), renderer,
 436                                              "text", EV_DOCUMENT_LINKS_COLUMN_PAGE_LABEL,
 437                                              NULL);
 438         g_object_set (G_OBJECT (renderer), "style", PANGO_STYLE_ITALIC, NULL);
 439
 440         g_signal_connect (priv->tree_view,
 441                           "button_press_event",
 442                           G_CALLBACK (button_press_cb),
 443                           ev_sidebar_links);
 444         g_signal_connect (priv->tree_view,
 445                           "popup_menu",
 446                           G_CALLBACK (popup_menu_cb),
 447                           ev_sidebar_links);
 448 }
 449
 450 static void
 451 ev_sidebar_links_init (EvSidebarLinks *ev_sidebar_links)
 452 {
 453         ev_sidebar_links->priv = EV_SIDEBAR_LINKS_GET_PRIVATE (ev_sidebar_links);
 454
 455         ev_sidebar_links_construct (ev_sidebar_links);
 456 }
 457
 458 static gboolean
 459 fill_page_labels (GtkTreeModel   *tree_model,
 460                   GtkTreePath    *path,
 461                   GtkTreeIter    *iter,
 462                   EvSidebarLinks *sidebar_links)
 463 {
 464         EvDocumentLinks *document_links;
 465         EvLink          *link;
 466         gchar           *page_label;
 467
 468         gtk_tree_model_get (tree_model, iter,
 469                             EV_DOCUMENT_LINKS_COLUMN_LINK, &link,
 470                             -1);
 471
 472         if (!link)
 473                 return FALSE;
 474
 475         document_links = EV_DOCUMENT_LINKS (sidebar_links->priv->document);
 476         page_label = ev_document_links_get_link_page_label (document_links, link);
 477         if (!page_label)
 478                 return FALSE;
 479
 480         gtk_tree_store_set (GTK_TREE_STORE (tree_model), iter,
 481                             EV_DOCUMENT_LINKS_COLUMN_PAGE_LABEL, page_label,
 482                             -1);
 483
 484         g_free (page_label);
 485         g_object_unref (link);
 486
 487         return FALSE;
 488 }
 489
 490 /* Public Functions */
 491
 492 GtkWidget *
 493 ev_sidebar_links_new (void)
 494 {
 495         GtkWidget *ev_sidebar_links;
 496
 497         ev_sidebar_links = g_object_new (EV_TYPE_SIDEBAR_LINKS, NULL);
 498
 499         return ev_sidebar_links;
 500 }
 501
 502 static gboolean
 503 update_page_callback_foreach (GtkTreeModel *model,
 504                               GtkTreePath  *path,
 505                               GtkTreeIter  *iter,
 506                               gpointer      data)
 507 {
 508         EvSidebarLinks *sidebar_links = (data);
 509         EvLink *link;
 510
 511         gtk_tree_model_get (model, iter,
 512                             EV_DOCUMENT_LINKS_COLUMN_LINK, &link,
 513                             -1);
 514
 515         if (link) {
 516                 int current_page;
 517                 int dest_page;
 518                 EvDocumentLinks *document_links = EV_DOCUMENT_LINKS (sidebar_links->priv->document);
 519
 520                 dest_page = ev_document_links_get_link_page (document_links, link);
 521                 g_object_unref (link);
 522
 523                 current_page = ev_document_model_get_page (sidebar_links->priv->doc_model);
 524
 525                 if (dest_page == current_page) {
 526                         gtk_tree_view_expand_to_path (GTK_TREE_VIEW (sidebar_links->priv->tree_view),
 527                                                       path);
 528                         gtk_tree_view_set_cursor (GTK_TREE_VIEW (sidebar_links->priv->tree_view),
 529                                                   path, NULL, FALSE);
 530
 531                         return TRUE;
 532                 }
 533         }
 534
 535         return FALSE;
 536 }
 537
 538 static void
 539 ev_sidebar_links_set_current_page (EvSidebarLinks *sidebar_links,
 540                                    gint            current_page)
 541 {
 542         GtkTreeSelection *selection;
 543         GtkTreeModel *model;
 544         GtkTreeIter iter;
 545
 546         /* Widget is not currently visible */
 547         if (!gtk_widget_get_mapped (GTK_WIDGET (sidebar_links)))
 548                 return;
 549
 550         selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (sidebar_links->priv->tree_view));
 551
 552         if (gtk_tree_selection_get_selected (selection, &model, &iter)) {
 553                 EvLink *link;
 554
 555                 gtk_tree_model_get (model, &iter,
 556                                     EV_DOCUMENT_LINKS_COLUMN_LINK, &link,
 557                                     -1);
 558                 if (link) {
 559                         gint dest_page;
 560                         EvDocumentLinks *document_links = EV_DOCUMENT_LINKS (sidebar_links->priv->document);
 561
 562                         dest_page = ev_document_links_get_link_page (document_links, link);
 563                         g_object_unref (link);
 564
 565                         if (dest_page == current_page)
 566                                 return;
 567                 }
 568         }
 569
 570         /* We go through the tree linearly looking for the first page that
 571          * matches.  This is pretty inefficient.  We can do something neat with
 572          * a GtkTreeModelSort here to make it faster, if it turns out to be
 573          * slow.
 574          */
 575         g_signal_handler_block (selection, sidebar_links->priv->selection_id);
 576         g_signal_handler_block (sidebar_links->priv->tree_view, sidebar_links->priv->row_activated_id);
 577
 578         gtk_tree_model_foreach (model,
 579                                 update_page_callback_foreach,
 580                                 sidebar_links);
 581
 582         g_signal_handler_unblock (selection, sidebar_links->priv->selection_id);
 583         g_signal_handler_unblock (sidebar_links->priv->tree_view, sidebar_links->priv->row_activated_id);
 584 }
 585
 586 static void
 587 update_page_callback (EvSidebarLinks *sidebar_links,
 588                       gint            old_page,
 589                       gint            new_page)
 590 {
 591         ev_sidebar_links_set_current_page (sidebar_links, new_page);
 592 }
 593
 594 static void
 595 row_activated_callback (GtkTreeView       *treeview,
 596                         GtkTreePath       *arg1,
 597                         GtkTreeViewColumn *arg2,
 598                         gpointer           user_data)
 599 {
 600         if (gtk_tree_view_row_expanded (GTK_TREE_VIEW (treeview), arg1)) {
 601                 gtk_tree_view_collapse_row (GTK_TREE_VIEW (treeview), arg1);
 602         } else {
 603                 gtk_tree_view_expand_row (GTK_TREE_VIEW (treeview), arg1, FALSE);
 604         }
 605 }
 606
 607 static void
 608 expand_open_links (GtkTreeView *tree_view, GtkTreeModel *model, GtkTreeIter *parent)
 609 {
 610         GtkTreeIter iter;
 611         gboolean expand;
 612
 613         if (gtk_tree_model_iter_children (model, &iter, parent)) {
 614                 do {
 615                         gtk_tree_model_get (model, &iter,
 616                                             EV_DOCUMENT_LINKS_COLUMN_EXPAND, &expand,
 617                                             -1);
 618                         if (expand) {
 619                                 GtkTreePath *path;
 620
 621                                 path = gtk_tree_model_get_path (model, &iter);
 622                                 gtk_tree_view_expand_row (tree_view, path, FALSE);
 623                                 gtk_tree_path_free (path);
 624                         }
 625
 626                         expand_open_links (tree_view, model, &iter);
 627                 } while (gtk_tree_model_iter_next (model, &iter));
 628         }
 629 }
 630
 631 static void
 632 ev_sidebar_links_set_links_model (EvSidebarLinks *sidebar_links,
 633                                   GtkTreeModel   *model)
 634 {
 635         EvSidebarLinksPrivate *priv = sidebar_links->priv;
 636
 637         if (priv->model == model)
 638                 return;
 639
 640         if (priv->model)
 641                 g_object_unref (priv->model);
 642         priv->model = g_object_ref (model);
 643
 644         g_object_notify (G_OBJECT (sidebar_links), "model");
 645 }
 646
 647 static void
 648 job_finished_callback (EvJobLinks     *job,
 649                        EvSidebarLinks *sidebar_links)
 650 {
 651         EvSidebarLinksPrivate *priv = sidebar_links->priv;
 652         GtkTreeSelection *selection;
 653
 654         ev_sidebar_links_set_links_model (sidebar_links, job->model);
 655
 656         gtk_tree_model_foreach (priv->model, (GtkTreeModelForeachFunc)fill_page_labels, sidebar_links);
 657
 658         gtk_tree_view_set_model (GTK_TREE_VIEW (priv->tree_view), job->model);
 659
 660         g_object_unref (job);
 661         priv->job = NULL;
 662
 663         expand_open_links (GTK_TREE_VIEW (priv->tree_view), priv->model, NULL);
 664
 665         selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (priv->tree_view));
 666         gtk_tree_selection_set_mode (selection, GTK_SELECTION_SINGLE);
 667
 668         if (priv->selection_id <= 0) {
 669                 priv->selection_id =
 670                         g_signal_connect (selection, "changed",
 671                                           G_CALLBACK (selection_changed_callback),
 672                                           sidebar_links);
 673         }
 674         priv->page_changed_id =
 675                 g_signal_connect_swapped (priv->doc_model, "page-changed",
 676                                           G_CALLBACK (update_page_callback),
 677                                           sidebar_links);
 678         if (priv->row_activated_id <= 0) {
 679                 priv->row_activated_id =
 680                         g_signal_connect (priv->tree_view, "row-activated",
 681                                           G_CALLBACK (row_activated_callback),
 682                                           sidebar_links);
 683         }
 684
 685         ev_sidebar_links_set_current_page (sidebar_links,
 686                                            ev_document_model_get_page (priv->doc_model));
 687 }
 688
 689 static void
 690 ev_sidebar_links_document_changed_cb (EvDocumentModel *model,
 691                                       GParamSpec      *pspec,
 692                                       EvSidebarLinks  *sidebar_links)
 693 {
 694         EvDocument *document = ev_document_model_get_document (model);
 695         EvSidebarLinksPrivate *priv = sidebar_links->priv;
 696
 697         if (!EV_IS_DOCUMENT_LINKS (document))
 698                 return;
 699
 700         if (!ev_document_links_has_document_links (EV_DOCUMENT_LINKS (document)))
 701                 return;
 702
 703         if (priv->document) {
 704                 gtk_tree_view_set_model (GTK_TREE_VIEW (priv->tree_view), NULL);
 705                 g_object_unref (priv->document);
 706         }
 707
 708         priv->document = g_object_ref (document);
 709
 710         if (priv->job) {
 711                 g_signal_handlers_disconnect_by_func (priv->job,
 712                                                       job_finished_callback,
 713                                                       sidebar_links);
 714                 g_object_unref (priv->job);
 715         }
 716
 717         priv->job = ev_job_links_new (document);
 718         g_signal_connect (priv->job,
 719                           "finished",
 720                           G_CALLBACK (job_finished_callback),
 721                           sidebar_links);
 722         /* The priority doesn't matter for this job */
 723         ev_job_scheduler_push_job (priv->job, EV_JOB_PRIORITY_NONE);
 724 }
 725
 726 static void
 727 ev_sidebar_links_set_model (EvSidebarPage   *sidebar_page,
 728                             EvDocumentModel *model)
 729 {
 730         EvSidebarLinks *sidebar_links = EV_SIDEBAR_LINKS (sidebar_page);
 731         EvSidebarLinksPrivate *priv = sidebar_links->priv;
 732
 733         if (priv->doc_model == model)
 734                 return;
 735
 736         priv->doc_model = model;
 737         g_signal_connect (model, "notify::document",
 738                           G_CALLBACK (ev_sidebar_links_document_changed_cb),
 739                           sidebar_page);
 740 }
 741
 742 static gboolean
 743 ev_sidebar_links_support_document (EvSidebarPage  *sidebar_page,
 744                                    EvDocument *document)
 745 {
 746         return (EV_IS_DOCUMENT_LINKS (document) &&
 747                     ev_document_links_has_document_links (EV_DOCUMENT_LINKS (document)));
 748 }
 749
 750 static const gchar*
 751 ev_sidebar_links_get_label (EvSidebarPage *sidebar_page)
 752 {
 753     return _("Index");
 754 }
 755
 756 static void
 757 ev_sidebar_links_page_iface_init (EvSidebarPageInterface *iface)
 758 {
 759         iface->support_document = ev_sidebar_links_support_document;
 760         iface->set_model = ev_sidebar_links_set_model;
 761         iface->get_label = ev_sidebar_links_get_label;
 762 }
 763