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 /* Public Functions */
 459
 460 GtkWidget *
 461 ev_sidebar_links_new (void)
 462 {
 463         GtkWidget *ev_sidebar_links;
 464
 465         ev_sidebar_links = g_object_new (EV_TYPE_SIDEBAR_LINKS, NULL);
 466
 467         return ev_sidebar_links;
 468 }
 469
 470 static gboolean
 471 update_page_callback_foreach (GtkTreeModel *model,
 472                               GtkTreePath  *path,
 473                               GtkTreeIter  *iter,
 474                               gpointer      data)
 475 {
 476         EvSidebarLinks *sidebar_links = (data);
 477         EvLink *link;
 478
 479         gtk_tree_model_get (model, iter,
 480                             EV_DOCUMENT_LINKS_COLUMN_LINK, &link,
 481                             -1);
 482
 483         if (link) {
 484                 int current_page;
 485                 int dest_page;
 486                 EvDocumentLinks *document_links = EV_DOCUMENT_LINKS (sidebar_links->priv->document);
 487
 488                 dest_page = ev_document_links_get_link_page (document_links, link);
 489                 g_object_unref (link);
 490
 491                 current_page = ev_document_model_get_page (sidebar_links->priv->doc_model);
 492
 493                 if (dest_page == current_page) {
 494                         gtk_tree_view_expand_to_path (GTK_TREE_VIEW (sidebar_links->priv->tree_view),
 495                                                       path);
 496                         gtk_tree_view_set_cursor (GTK_TREE_VIEW (sidebar_links->priv->tree_view),
 497                                                   path, NULL, FALSE);
 498
 499                         return TRUE;
 500                 }
 501         }
 502
 503         return FALSE;
 504 }
 505
 506 static void
 507 ev_sidebar_links_set_current_page (EvSidebarLinks *sidebar_links,
 508                                    gint            current_page)
 509 {
 510         GtkTreeSelection *selection;
 511         GtkTreeModel *model;
 512         GtkTreeIter iter;
 513
 514         /* Widget is not currently visible */
 515         if (!gtk_widget_get_mapped (GTK_WIDGET (sidebar_links)))
 516                 return;
 517
 518         selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (sidebar_links->priv->tree_view));
 519
 520         if (gtk_tree_selection_get_selected (selection, &model, &iter)) {
 521                 EvLink *link;
 522
 523                 gtk_tree_model_get (model, &iter,
 524                                     EV_DOCUMENT_LINKS_COLUMN_LINK, &link,
 525                                     -1);
 526                 if (link) {
 527                         gint dest_page;
 528                         EvDocumentLinks *document_links = EV_DOCUMENT_LINKS (sidebar_links->priv->document);
 529
 530                         dest_page = ev_document_links_get_link_page (document_links, link);
 531                         g_object_unref (link);
 532
 533                         if (dest_page == current_page)
 534                                 return;
 535                 }
 536         }
 537
 538         /* We go through the tree linearly looking for the first page that
 539          * matches.  This is pretty inefficient.  We can do something neat with
 540          * a GtkTreeModelSort here to make it faster, if it turns out to be
 541          * slow.
 542          */
 543         g_signal_handler_block (selection, sidebar_links->priv->selection_id);
 544         g_signal_handler_block (sidebar_links->priv->tree_view, sidebar_links->priv->row_activated_id);
 545
 546         gtk_tree_model_foreach (model,
 547                                 update_page_callback_foreach,
 548                                 sidebar_links);
 549
 550         g_signal_handler_unblock (selection, sidebar_links->priv->selection_id);
 551         g_signal_handler_unblock (sidebar_links->priv->tree_view, sidebar_links->priv->row_activated_id);
 552 }
 553
 554 static void
 555 update_page_callback (EvSidebarLinks *sidebar_links,
 556                       gint            old_page,
 557                       gint            new_page)
 558 {
 559         ev_sidebar_links_set_current_page (sidebar_links, new_page);
 560 }
 561
 562 static void
 563 row_activated_callback (GtkTreeView       *treeview,
 564                         GtkTreePath       *arg1,
 565                         GtkTreeViewColumn *arg2,
 566                         gpointer           user_data)
 567 {
 568         if (gtk_tree_view_row_expanded (GTK_TREE_VIEW (treeview), arg1)) {
 569                 gtk_tree_view_collapse_row (GTK_TREE_VIEW (treeview), arg1);
 570         } else {
 571                 gtk_tree_view_expand_row (GTK_TREE_VIEW (treeview), arg1, FALSE);
 572         }
 573 }
 574
 575 static void
 576 expand_open_links (GtkTreeView *tree_view, GtkTreeModel *model, GtkTreeIter *parent)
 577 {
 578         GtkTreeIter iter;
 579         gboolean expand;
 580
 581         if (gtk_tree_model_iter_children (model, &iter, parent)) {
 582                 do {
 583                         gtk_tree_model_get (model, &iter,
 584                                             EV_DOCUMENT_LINKS_COLUMN_EXPAND, &expand,
 585                                             -1);
 586                         if (expand) {
 587                                 GtkTreePath *path;
 588
 589                                 path = gtk_tree_model_get_path (model, &iter);
 590                                 gtk_tree_view_expand_row (tree_view, path, FALSE);
 591                                 gtk_tree_path_free (path);
 592                         }
 593
 594                         expand_open_links (tree_view, model, &iter);
 595                 } while (gtk_tree_model_iter_next (model, &iter));
 596         }
 597 }
 598
 599 static void
 600 ev_sidebar_links_set_links_model (EvSidebarLinks *sidebar_links,
 601                                   GtkTreeModel   *model)
 602 {
 603         EvSidebarLinksPrivate *priv = sidebar_links->priv;
 604
 605         if (priv->model == model)
 606                 return;
 607
 608         if (priv->model)
 609                 g_object_unref (priv->model);
 610         priv->model = g_object_ref (model);
 611
 612         g_object_notify (G_OBJECT (sidebar_links), "model");
 613 }
 614
 615 static void
 616 job_finished_callback (EvJobLinks     *job,
 617                        EvSidebarLinks *sidebar_links)
 618 {
 619         EvSidebarLinksPrivate *priv = sidebar_links->priv;
 620         GtkTreeSelection *selection;
 621
 622         ev_sidebar_links_set_links_model (sidebar_links, job->model);
 623
 624         gtk_tree_view_set_model (GTK_TREE_VIEW (priv->tree_view), job->model);
 625
 626         g_object_unref (job);
 627         priv->job = NULL;
 628
 629         expand_open_links (GTK_TREE_VIEW (priv->tree_view), priv->model, NULL);
 630
 631         selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (priv->tree_view));
 632         gtk_tree_selection_set_mode (selection, GTK_SELECTION_SINGLE);
 633
 634         if (priv->selection_id <= 0) {
 635                 priv->selection_id =
 636                         g_signal_connect (selection, "changed",
 637                                           G_CALLBACK (selection_changed_callback),
 638                                           sidebar_links);
 639         }
 640         priv->page_changed_id =
 641                 g_signal_connect_swapped (priv->doc_model, "page-changed",
 642                                           G_CALLBACK (update_page_callback),
 643                                           sidebar_links);
 644         if (priv->row_activated_id <= 0) {
 645                 priv->row_activated_id =
 646                         g_signal_connect (priv->tree_view, "row-activated",
 647                                           G_CALLBACK (row_activated_callback),
 648                                           sidebar_links);
 649         }
 650
 651         ev_sidebar_links_set_current_page (sidebar_links,
 652                                            ev_document_model_get_page (priv->doc_model));
 653 }
 654
 655 static void
 656 ev_sidebar_links_document_changed_cb (EvDocumentModel *model,
 657                                       GParamSpec      *pspec,
 658                                       EvSidebarLinks  *sidebar_links)
 659 {
 660         EvDocument *document = ev_document_model_get_document (model);
 661         EvSidebarLinksPrivate *priv = sidebar_links->priv;
 662
 663         if (!EV_IS_DOCUMENT_LINKS (document))
 664                 return;
 665
 666         if (!ev_document_links_has_document_links (EV_DOCUMENT_LINKS (document)))
 667                 return;
 668
 669         if (priv->document) {
 670                 gtk_tree_view_set_model (GTK_TREE_VIEW (priv->tree_view), NULL);
 671                 g_object_unref (priv->document);
 672         }
 673
 674         priv->document = g_object_ref (document);
 675
 676         if (priv->job) {
 677                 g_signal_handlers_disconnect_by_func (priv->job,
 678                                                       job_finished_callback,
 679                                                       sidebar_links);
 680                 g_object_unref (priv->job);
 681         }
 682
 683         priv->job = ev_job_links_new (document);
 684         g_signal_connect (priv->job,
 685                           "finished",
 686                           G_CALLBACK (job_finished_callback),
 687                           sidebar_links);
 688         /* The priority doesn't matter for this job */
 689         ev_job_scheduler_push_job (priv->job, EV_JOB_PRIORITY_NONE);
 690 }
 691
 692 static void
 693 ev_sidebar_links_set_model (EvSidebarPage   *sidebar_page,
 694                             EvDocumentModel *model)
 695 {
 696         EvSidebarLinks *sidebar_links = EV_SIDEBAR_LINKS (sidebar_page);
 697         EvSidebarLinksPrivate *priv = sidebar_links->priv;
 698
 699         if (priv->doc_model == model)
 700                 return;
 701
 702         priv->doc_model = model;
 703         g_signal_connect (model, "notify::document",
 704                           G_CALLBACK (ev_sidebar_links_document_changed_cb),
 705                           sidebar_page);
 706 }
 707
 708 static gboolean
 709 ev_sidebar_links_support_document (EvSidebarPage  *sidebar_page,
 710                                    EvDocument *document)
 711 {
 712         return (EV_IS_DOCUMENT_LINKS (document) &&
 713                     ev_document_links_has_document_links (EV_DOCUMENT_LINKS (document)));
 714 }
 715
 716 static const gchar*
 717 ev_sidebar_links_get_label (EvSidebarPage *sidebar_page)
 718 {
 719     return _("Index");
 720 }
 721
 722 static void
 723 ev_sidebar_links_page_iface_init (EvSidebarPageInterface *iface)
 724 {
 725         iface->support_document = ev_sidebar_links_support_document;
 726         iface->set_model = ev_sidebar_links_set_model;
 727         iface->get_label = ev_sidebar_links_get_label;
 728 }
 729