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            (EvSidebarPageIface *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
 288                 gtk_tree_model_get (model, &iter,
 289                                     EV_DOCUMENT_LINKS_COLUMN_LINK, &link,
 290                                     -1);
 291
 292                 if (!link)
 293                         return;
 294
 295                 first_page = ev_link_get_page (link);
 296                 if (first_page == -1) {
 297                         g_object_unref (link);
 298                         return;
 299                 }
 300
 301                 first_page++;
 302                 g_object_unref (link);
 303
 304                 if (gtk_tree_model_iter_next (model, &iter)) {
 305                         gtk_tree_model_get (model, &iter,
 306                                             EV_DOCUMENT_LINKS_COLUMN_LINK, &link,
 307                                             -1);
 308
 309                         if (link) {
 310                                 last_page = ev_link_get_page (link);
 311                                 g_object_unref (link);
 312                         }
 313                 } else {
 314                         last_page = ev_document_get_n_pages (sidebar->priv->document);
 315                 }
 316
 317                 if (last_page == -1)
 318                         last_page = ev_document_get_n_pages (sidebar->priv->document);
 319
 320                 window = gtk_widget_get_toplevel (GTK_WIDGET (sidebar));
 321                 if (EV_IS_WINDOW (window)) {
 322                         ev_window_print_range (EV_WINDOW (window), first_page, last_page);
 323                 }
 324         }
 325 }
 326
 327 static GtkMenu *
 328 build_popup_menu (EvSidebarLinks *sidebar)
 329 {
 330         GtkWidget *menu;
 331         GtkWidget *item;
 332
 333         menu = gtk_menu_new ();
 334         item = gtk_image_menu_item_new_from_stock (GTK_STOCK_PRINT, NULL);
 335         gtk_label_set_label (GTK_LABEL (gtk_bin_get_child (GTK_BIN (item))), _("Print…"));
 336         gtk_widget_show (item);
 337         gtk_menu_shell_append (GTK_MENU_SHELL (menu), item);
 338         g_signal_connect (item, "activate",
 339                           G_CALLBACK (print_section_cb), sidebar);
 340
 341         return GTK_MENU (menu);
 342 }
 343
 344 static void
 345 popup_menu_cb (GtkWidget *treeview, EvSidebarLinks *sidebar)
 346 {
 347         GtkMenu *menu = build_popup_menu (sidebar);
 348
 349         gtk_menu_popup (menu, NULL, NULL,
 350                         ev_gui_menu_position_tree_selection,
 351                         sidebar->priv->tree_view, 0,
 352                         gtk_get_current_event_time ());
 353         gtk_menu_shell_select_first (GTK_MENU_SHELL (menu), FALSE);
 354 }
 355
 356 static gboolean
 357 button_press_cb (GtkWidget *treeview,
 358                  GdkEventButton *event,
 359                  EvSidebarLinks *sidebar)
 360 {
 361         GtkTreePath *path = NULL;
 362
 363         if (event->button == 3) {
 364                 if (gtk_tree_view_get_path_at_pos (GTK_TREE_VIEW (treeview),
 365                                                    event->x,
 366                                                    event->y,
 367                                                    &path,
 368                                                    NULL, NULL, NULL)) {
 369                         gtk_tree_view_set_cursor (GTK_TREE_VIEW (treeview),
 370                                                   path, NULL, FALSE);
 371                         gtk_menu_popup (build_popup_menu (sidebar), NULL,
 372                                         NULL, NULL, NULL, event->button,
 373                                         gtk_get_current_event_time ());
 374                         gtk_tree_path_free (path);
 375
 376                         return TRUE;
 377                 }
 378         }
 379
 380         return FALSE;
 381 }
 382
 383
 384 static void
 385 ev_sidebar_links_construct (EvSidebarLinks *ev_sidebar_links)
 386 {
 387         EvSidebarLinksPrivate *priv;
 388         GtkWidget *swindow;
 389         GtkTreeViewColumn *column;
 390         GtkCellRenderer *renderer;
 391         GtkTreeSelection *selection;
 392         GtkTreeModel *loading_model;
 393
 394         priv = ev_sidebar_links->priv;
 395
 396         swindow = gtk_scrolled_window_new (NULL, NULL);
 397
 398         gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (swindow),
 399                                         GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);
 400         gtk_scrolled_window_set_shadow_type (GTK_SCROLLED_WINDOW (swindow),
 401                                              GTK_SHADOW_IN);
 402
 403         /* Create tree view */
 404         loading_model = create_loading_model ();
 405         priv->tree_view = gtk_tree_view_new_with_model (loading_model);
 406         g_object_unref (loading_model);
 407
 408         selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (priv->tree_view));
 409         gtk_tree_selection_set_mode (selection, GTK_SELECTION_NONE);
 410         gtk_tree_view_set_headers_visible (GTK_TREE_VIEW (priv->tree_view), FALSE);
 411         gtk_container_add (GTK_CONTAINER (swindow), priv->tree_view);
 412
 413         gtk_box_pack_start (GTK_BOX (ev_sidebar_links), swindow, TRUE, TRUE, 0);
 414         gtk_widget_show_all (GTK_WIDGET (ev_sidebar_links));
 415
 416         column = gtk_tree_view_column_new ();
 417         gtk_tree_view_column_set_expand (GTK_TREE_VIEW_COLUMN (column), TRUE);
 418         gtk_tree_view_append_column (GTK_TREE_VIEW (priv->tree_view), column);
 419
 420         renderer = (GtkCellRenderer*)
 421                 g_object_new (GTK_TYPE_CELL_RENDERER_TEXT,
 422                               "ellipsize", PANGO_ELLIPSIZE_END,
 423                               NULL);
 424         gtk_tree_view_column_pack_start (GTK_TREE_VIEW_COLUMN (column), renderer, TRUE);
 425         gtk_tree_view_column_set_attributes (GTK_TREE_VIEW_COLUMN (column), renderer,
 426                                              "markup", EV_DOCUMENT_LINKS_COLUMN_MARKUP,
 427                                              NULL);
 428
 429
 430         renderer = gtk_cell_renderer_text_new ();
 431         gtk_tree_view_column_pack_end (GTK_TREE_VIEW_COLUMN (column), renderer, FALSE);
 432         gtk_tree_view_column_set_attributes (GTK_TREE_VIEW_COLUMN (column), renderer,
 433                                              "text", EV_DOCUMENT_LINKS_COLUMN_PAGE_LABEL,
 434                                              NULL);
 435         g_object_set (G_OBJECT (renderer), "style", PANGO_STYLE_ITALIC, NULL);
 436
 437         g_signal_connect (priv->tree_view,
 438                           "button_press_event",
 439                           G_CALLBACK (button_press_cb),
 440                           ev_sidebar_links);
 441         g_signal_connect (priv->tree_view,
 442                           "popup_menu",
 443                           G_CALLBACK (popup_menu_cb),
 444                           ev_sidebar_links);
 445 }
 446
 447 static void
 448 ev_sidebar_links_init (EvSidebarLinks *ev_sidebar_links)
 449 {
 450         ev_sidebar_links->priv = EV_SIDEBAR_LINKS_GET_PRIVATE (ev_sidebar_links);
 451
 452         ev_sidebar_links_construct (ev_sidebar_links);
 453 }
 454
 455 static gboolean
 456 fill_page_labels (GtkTreeModel *tree_model,
 457                   GtkTreePath *path,
 458                   GtkTreeIter *iter,
 459                   EvSidebarLinks    *sidebar_links)
 460 {
 461         EvLink *link;
 462         gint page;
 463         gchar *page_label;
 464
 465         gtk_tree_model_get (tree_model, iter,
 466                             EV_DOCUMENT_LINKS_COLUMN_LINK, &link,
 467                             -1);
 468
 469         if (!link)
 470                 return FALSE;
 471
 472         page = ev_link_get_page (link);
 473
 474         if (page < 0)
 475                 return FALSE;
 476
 477         page_label = ev_document_get_page_label (sidebar_links->priv->document,
 478                                                  page);
 479         gtk_tree_store_set (GTK_TREE_STORE (tree_model), iter,
 480                             EV_DOCUMENT_LINKS_COLUMN_PAGE_LABEL, page_label,
 481                             -1);
 482
 483         g_free (page_label);
 484
 485         g_object_unref (link);
 486         return FALSE;
 487 }
 488
 489 /* Public Functions */
 490
 491 GtkWidget *
 492 ev_sidebar_links_new (void)
 493 {
 494         GtkWidget *ev_sidebar_links;
 495
 496         ev_sidebar_links = g_object_new (EV_TYPE_SIDEBAR_LINKS, NULL);
 497
 498         return ev_sidebar_links;
 499 }
 500
 501 static gboolean
 502 update_page_callback_foreach (GtkTreeModel *model,
 503                               GtkTreePath  *path,
 504                               GtkTreeIter  *iter,
 505                               gpointer      data)
 506 {
 507         EvSidebarLinks *sidebar_links = (data);
 508         EvLink *link;
 509
 510         gtk_tree_model_get (model, iter,
 511                             EV_DOCUMENT_LINKS_COLUMN_LINK, &link,
 512                             -1);
 513
 514         if (link) {
 515                 int current_page;
 516                 int dest_page;
 517
 518                 dest_page = ev_link_get_page (link);
 519                 g_object_unref (link);
 520
 521                 current_page = ev_document_model_get_page (sidebar_links->priv->doc_model);
 522
 523                 if (dest_page == current_page) {
 524                         gtk_tree_view_expand_to_path (GTK_TREE_VIEW (sidebar_links->priv->tree_view),
 525                                                       path);
 526                         gtk_tree_view_set_cursor (GTK_TREE_VIEW (sidebar_links->priv->tree_view),
 527                                                   path, NULL, FALSE);
 528
 529                         return TRUE;
 530                 }
 531         }
 532
 533         return FALSE;
 534 }
 535
 536 static void
 537 ev_sidebar_links_set_current_page (EvSidebarLinks *sidebar_links,
 538                                    gint            current_page)
 539 {
 540         GtkTreeSelection *selection;
 541         GtkTreeModel *model;
 542         GtkTreeIter iter;
 543
 544         /* Widget is not currently visible */
 545         if (!gtk_widget_get_mapped (GTK_WIDGET (sidebar_links)))
 546                 return;
 547
 548         selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (sidebar_links->priv->tree_view));
 549
 550         if (gtk_tree_selection_get_selected (selection, &model, &iter)) {
 551                 EvLink *link;
 552
 553                 gtk_tree_model_get (model, &iter,
 554                                     EV_DOCUMENT_LINKS_COLUMN_LINK, &link,
 555                                     -1);
 556                 if (link) {
 557                         gint dest_page;
 558
 559                         dest_page = ev_link_get_page (link);
 560                         g_object_unref (link);
 561
 562                         if (dest_page == current_page)
 563                                 return;
 564                 }
 565         }
 566
 567         /* We go through the tree linearly looking for the first page that
 568          * matches.  This is pretty inefficient.  We can do something neat with
 569          * a GtkTreeModelSort here to make it faster, if it turns out to be
 570          * slow.
 571          */
 572         g_signal_handler_block (selection, sidebar_links->priv->selection_id);
 573         g_signal_handler_block (sidebar_links->priv->tree_view, sidebar_links->priv->row_activated_id);
 574
 575         gtk_tree_model_foreach (model,
 576                                 update_page_callback_foreach,
 577                                 sidebar_links);
 578
 579         g_signal_handler_unblock (selection, sidebar_links->priv->selection_id);
 580         g_signal_handler_unblock (sidebar_links->priv->tree_view, sidebar_links->priv->row_activated_id);
 581 }
 582
 583 static void
 584 update_page_callback (EvSidebarLinks *sidebar_links,
 585                       gint            old_page,
 586                       gint            new_page)
 587 {
 588         ev_sidebar_links_set_current_page (sidebar_links, new_page);
 589 }
 590
 591 static void
 592 row_activated_callback (GtkTreeView       *treeview,
 593                         GtkTreePath       *arg1,
 594                         GtkTreeViewColumn *arg2,
 595                         gpointer           user_data)
 596 {
 597         if (gtk_tree_view_row_expanded (GTK_TREE_VIEW (treeview), arg1)) {
 598                 gtk_tree_view_collapse_row (GTK_TREE_VIEW (treeview), arg1);
 599         } else {
 600                 gtk_tree_view_expand_row (GTK_TREE_VIEW (treeview), arg1, FALSE);
 601         }
 602 }
 603
 604 static void
 605 expand_open_links (GtkTreeView *tree_view, GtkTreeModel *model, GtkTreeIter *parent)
 606 {
 607         GtkTreeIter iter;
 608         gboolean expand;
 609
 610         if (gtk_tree_model_iter_children (model, &iter, parent)) {
 611                 do {
 612                         gtk_tree_model_get (model, &iter,
 613                                             EV_DOCUMENT_LINKS_COLUMN_EXPAND, &expand,
 614                                             -1);
 615                         if (expand) {
 616                                 GtkTreePath *path;
 617
 618                                 path = gtk_tree_model_get_path (model, &iter);
 619                                 gtk_tree_view_expand_row (tree_view, path, FALSE);
 620                                 gtk_tree_path_free (path);
 621                         }
 622
 623                         expand_open_links (tree_view, model, &iter);
 624                 } while (gtk_tree_model_iter_next (model, &iter));
 625         }
 626 }
 627
 628 static void
 629 ev_sidebar_links_set_links_model (EvSidebarLinks *sidebar_links,
 630                                   GtkTreeModel   *model)
 631 {
 632         EvSidebarLinksPrivate *priv = sidebar_links->priv;
 633
 634         if (priv->model == model)
 635                 return;
 636
 637         if (priv->model)
 638                 g_object_unref (priv->model);
 639         priv->model = g_object_ref (model);
 640
 641         g_object_notify (G_OBJECT (sidebar_links), "model");
 642 }
 643
 644 static void
 645 job_finished_callback (EvJobLinks     *job,
 646                        EvSidebarLinks *sidebar_links)
 647 {
 648         EvSidebarLinksPrivate *priv = sidebar_links->priv;
 649         GtkTreeSelection *selection;
 650
 651         ev_sidebar_links_set_links_model (sidebar_links, job->model);
 652
 653         gtk_tree_model_foreach (priv->model, (GtkTreeModelForeachFunc)fill_page_labels, sidebar_links);
 654
 655         gtk_tree_view_set_model (GTK_TREE_VIEW (priv->tree_view), job->model);
 656
 657         g_object_unref (job);
 658         priv->job = NULL;
 659
 660         expand_open_links (GTK_TREE_VIEW (priv->tree_view), priv->model, NULL);
 661
 662         selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (priv->tree_view));
 663         gtk_tree_selection_set_mode (selection, GTK_SELECTION_SINGLE);
 664
 665         if (priv->selection_id <= 0) {
 666                 priv->selection_id =
 667                         g_signal_connect (selection, "changed",
 668                                           G_CALLBACK (selection_changed_callback),
 669                                           sidebar_links);
 670         }
 671         priv->page_changed_id =
 672                 g_signal_connect_swapped (priv->doc_model, "page-changed",
 673                                           G_CALLBACK (update_page_callback),
 674                                           sidebar_links);
 675         if (priv->row_activated_id <= 0) {
 676                 priv->row_activated_id =
 677                         g_signal_connect (priv->tree_view, "row-activated",
 678                                           G_CALLBACK (row_activated_callback),
 679                                           sidebar_links);
 680         }
 681
 682         ev_sidebar_links_set_current_page (sidebar_links,
 683                                            ev_document_model_get_page (priv->doc_model));
 684 }
 685
 686 static void
 687 ev_sidebar_links_document_changed_cb (EvDocumentModel *model,
 688                                       GParamSpec      *pspec,
 689                                       EvSidebarLinks  *sidebar_links)
 690 {
 691         EvDocument *document = ev_document_model_get_document (model);
 692         EvSidebarLinksPrivate *priv = sidebar_links->priv;
 693
 694         if (!EV_IS_DOCUMENT_LINKS (document))
 695                 return;
 696
 697         if (!ev_document_links_has_document_links (EV_DOCUMENT_LINKS (document)))
 698                 return;
 699
 700         if (priv->document) {
 701                 gtk_tree_view_set_model (GTK_TREE_VIEW (priv->tree_view), NULL);
 702                 g_object_unref (priv->document);
 703         }
 704
 705         priv->document = g_object_ref (document);
 706
 707         if (priv->job) {
 708                 g_signal_handlers_disconnect_by_func (priv->job,
 709                                                       job_finished_callback,
 710                                                       sidebar_links);
 711                 g_object_unref (priv->job);
 712         }
 713
 714         priv->job = ev_job_links_new (document);
 715         g_signal_connect (priv->job,
 716                           "finished",
 717                           G_CALLBACK (job_finished_callback),
 718                           sidebar_links);
 719         /* The priority doesn't matter for this job */
 720         ev_job_scheduler_push_job (priv->job, EV_JOB_PRIORITY_NONE);
 721 }
 722
 723 static void
 724 ev_sidebar_links_set_model (EvSidebarPage   *sidebar_page,
 725                             EvDocumentModel *model)
 726 {
 727         EvSidebarLinks *sidebar_links = EV_SIDEBAR_LINKS (sidebar_page);
 728         EvSidebarLinksPrivate *priv = sidebar_links->priv;
 729
 730         if (priv->doc_model == model)
 731                 return;
 732
 733         priv->doc_model = model;
 734         g_signal_connect (model, "notify::document",
 735                           G_CALLBACK (ev_sidebar_links_document_changed_cb),
 736                           sidebar_page);
 737 }
 738
 739 static gboolean
 740 ev_sidebar_links_support_document (EvSidebarPage  *sidebar_page,
 741                                    EvDocument *document)
 742 {
 743         return (EV_IS_DOCUMENT_LINKS (document) &&
 744                     ev_document_links_has_document_links (EV_DOCUMENT_LINKS (document)));
 745 }
 746
 747 static const gchar*
 748 ev_sidebar_links_get_label (EvSidebarPage *sidebar_page)
 749 {
 750     return _("Index");
 751 }
 752
 753 static void
 754 ev_sidebar_links_page_iface_init (EvSidebarPageIface *iface)
 755 {
 756         iface->support_document = ev_sidebar_links_support_document;
 757         iface->set_model = ev_sidebar_links_set_model;
 758         iface->get_label = ev_sidebar_links_get_label;
 759 }
 760