shell/ev-sidebar-thumbnails.c

   1 /* this file is part of evince, a gnome document viewer
   2  *
   3  *  Copyright (C) 2004 Red Hat, Inc.
   4  *  Copyright (C) 2004, 2005 Anders Carlsson <andersca@gnome.org>
   5  *
   6  *  Authors:
   7  *    Jonathan Blandford <jrb@alum.mit.edu>
   8  *    Anders Carlsson <andersca@gnome.org>
   9  *
  10  * Evince is free software; you can redistribute it and/or modify it
  11  * under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * Evince is distributed in the hope that it will be useful, but
  16  * WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  18  * General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
  23  */
  24
  25 #ifdef HAVE_CONFIG_H
  26 #include "config.h"
  27 #endif
  28
  29 #include <string.h>
  30 #include <gtk/gtk.h>
  31 #include <glib/gi18n.h>
  32
  33 #include "ev-sidebar-page.h"
  34 #include "ev-sidebar-thumbnails.h"
  35 #include "ev-document-thumbnails.h"
  36 #include "ev-document-misc.h"
  37 #include "ev-job-queue.h"
  38 #include "ev-window.h"
  39 #include "ev-utils.h"
  40
  41 #define THUMBNAIL_WIDTH 100
  42
  43 /* The IconView doesn't scale nearly as well as the TreeView, so we arbitrarily
  44  * limit its use */
  45 #define MAX_ICON_VIEW_PAGE_COUNT 1500
  46
  47
  48 struct _EvSidebarThumbnailsPrivate {
  49         GtkWidget *swindow;
  50         GtkWidget *icon_view;
  51         GtkWidget *tree_view;
  52         GtkAdjustment *vadjustment;
  53         GtkListStore *list_store;
  54         GdkPixbuf *loading_icon;
  55         EvDocument *document;
  56         EvPageCache *page_cache;
  57
  58         gint n_pages, pages_done;
  59
  60         /* Visible pages */
  61         gint start_page, end_page;
  62 };
  63
  64 enum {
  65         COLUMN_PAGE_STRING,
  66         COLUMN_PIXBUF,
  67         COLUMN_THUMBNAIL_SET,
  68         COLUMN_JOB,
  69         NUM_COLUMNS
  70 };
  71
  72 enum {
  73         PROP_0,
  74         PROP_WIDGET,
  75 };
  76
  77 static void         ev_sidebar_thumbnails_clear_model      (EvSidebarThumbnails *sidebar);
  78 static gboolean     ev_sidebar_thumbnails_support_document (EvSidebarPage       *sidebar_page,
  79                                                             EvDocument          *document);
  80 static void         ev_sidebar_thumbnails_page_iface_init  (EvSidebarPageIface  *iface);
  81 static void         ev_sidebar_thumbnails_set_document     (EvSidebarPage       *sidebar_page,
  82                                                             EvDocument          *document);
  83 static const gchar* ev_sidebar_thumbnails_get_label        (EvSidebarPage       *sidebar_page);
  84 static void         thumbnail_job_completed_callback       (EvJobThumbnail      *job,
  85                                                             EvSidebarThumbnails *sidebar_thumbnails);
  86
  87 G_DEFINE_TYPE_EXTENDED (EvSidebarThumbnails,
  88                         ev_sidebar_thumbnails,
  89                         GTK_TYPE_VBOX,
  90                         0,
  91                         G_IMPLEMENT_INTERFACE (EV_TYPE_SIDEBAR_PAGE,
  92                                                ev_sidebar_thumbnails_page_iface_init))
  93
  94 #define EV_SIDEBAR_THUMBNAILS_GET_PRIVATE(object) \
  95         (G_TYPE_INSTANCE_GET_PRIVATE ((object), EV_TYPE_SIDEBAR_THUMBNAILS, EvSidebarThumbnailsPrivate));
  96
  97
  98 static void
  99 ev_sidebar_thumbnails_dispose (GObject *object)
 100 {
 101         EvSidebarThumbnails *sidebar_thumbnails = EV_SIDEBAR_THUMBNAILS (object);
 102
 103         ev_sidebar_thumbnails_clear_model (sidebar_thumbnails);
 104         g_object_unref (sidebar_thumbnails->priv->loading_icon);
 105         g_object_unref (sidebar_thumbnails->priv->list_store);
 106
 107         G_OBJECT_CLASS (ev_sidebar_thumbnails_parent_class)->dispose (object);
 108 }
 109
 110 static void
 111 ev_sidebar_thumbnails_get_property (GObject    *object,
 112                                          guint       prop_id,
 113                                          GValue     *value,
 114                                          GParamSpec *pspec)
 115 {
 116         EvSidebarThumbnails *sidebar = EV_SIDEBAR_THUMBNAILS (object);
 117
 118         switch (prop_id)
 119         {
 120         case PROP_WIDGET:
 121                 if (sidebar->priv->tree_view)
 122                         g_value_set_object (value, sidebar->priv->tree_view);
 123                 else
 124                         g_value_set_object (value, sidebar->priv->icon_view);
 125                 break;
 126         default:
 127                 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 128                 break;
 129         }
 130 }
 131
 132 static void
 133 ev_sidebar_thumbnails_class_init (EvSidebarThumbnailsClass *ev_sidebar_thumbnails_class)
 134 {
 135         GObjectClass *g_object_class;
 136         GtkObjectClass *gtk_object_class;
 137
 138         g_object_class = G_OBJECT_CLASS (ev_sidebar_thumbnails_class);
 139         gtk_object_class = GTK_OBJECT_CLASS (ev_sidebar_thumbnails_class);
 140
 141         g_object_class->dispose = ev_sidebar_thumbnails_dispose;
 142         g_object_class->get_property = ev_sidebar_thumbnails_get_property;
 143
 144         g_object_class_override_property (g_object_class,
 145                                           PROP_WIDGET,
 146                                           "main-widget");
 147
 148         g_type_class_add_private (g_object_class, sizeof (EvSidebarThumbnailsPrivate));
 149 }
 150
 151 GtkWidget *
 152 ev_sidebar_thumbnails_new (void)
 153 {
 154         GtkWidget *ev_sidebar_thumbnails;
 155
 156         ev_sidebar_thumbnails = g_object_new (EV_TYPE_SIDEBAR_THUMBNAILS, NULL);
 157
 158         return ev_sidebar_thumbnails;
 159 }
 160
 161 static void
 162 clear_range (EvSidebarThumbnails *sidebar_thumbnails,
 163              gint                 start_page,
 164              gint                 end_page)
 165 {
 166         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 167         GtkTreePath *path;
 168         GtkTreeIter iter;
 169         gboolean result;
 170
 171         g_assert (start_page <= end_page);
 172
 173         path = gtk_tree_path_new_from_indices (start_page, -1);
 174         for (result = gtk_tree_model_get_iter (GTK_TREE_MODEL (priv->list_store), &iter, path);
 175              result && start_page <= end_page;
 176              result = gtk_tree_model_iter_next (GTK_TREE_MODEL (priv->list_store), &iter), start_page ++) {
 177                 EvJobThumbnail *job;
 178
 179                 gtk_tree_model_get (GTK_TREE_MODEL (priv->list_store),
 180                                     &iter,
 181                                     COLUMN_JOB, &job,
 182                                     -1);
 183
 184                 if (job) {
 185                         g_signal_handlers_disconnect_by_func (job, thumbnail_job_completed_callback, sidebar_thumbnails);
 186                         ev_job_queue_remove_job (EV_JOB (job));
 187                         g_object_unref (job);
 188                 }
 189
 190                 gtk_list_store_set (priv->list_store, &iter,
 191                                     COLUMN_JOB, NULL,
 192                                     COLUMN_THUMBNAIL_SET, FALSE,
 193                                     COLUMN_PIXBUF, priv->loading_icon,
 194                                     -1);
 195         }
 196         gtk_tree_path_free (path);
 197 }
 198
 199 static void
 200 add_range (EvSidebarThumbnails *sidebar_thumbnails,
 201            gint                 start_page,
 202            gint                 end_page)
 203 {
 204         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 205         GtkTreePath *path;
 206         GtkTreeIter iter;
 207         gboolean result;
 208         gint page = start_page;
 209
 210         g_assert (start_page <= end_page);
 211
 212         path = gtk_tree_path_new_from_indices (start_page, -1);
 213         for (result = gtk_tree_model_get_iter (GTK_TREE_MODEL (priv->list_store), &iter, path);
 214              result && page <= end_page;
 215              result = gtk_tree_model_iter_next (GTK_TREE_MODEL (priv->list_store), &iter), page ++) {
 216                 EvJobThumbnail *job;
 217                 gboolean thumbnail_set;
 218
 219                 gtk_tree_model_get (GTK_TREE_MODEL (priv->list_store), &iter,
 220                                     COLUMN_JOB, &job,
 221                                     COLUMN_THUMBNAIL_SET, &thumbnail_set,
 222                                     -1);
 223
 224                 if (job == NULL && !thumbnail_set) {
 225                         job = (EvJobThumbnail *)ev_job_thumbnail_new (priv->document, page, THUMBNAIL_WIDTH);
 226                         ev_job_queue_add_job (EV_JOB (job), EV_JOB_PRIORITY_HIGH);
 227                         g_object_set_data_full (G_OBJECT (job), "tree_iter",
 228                                                 gtk_tree_iter_copy (&iter),
 229                                                 (GDestroyNotify) gtk_tree_iter_free);
 230                         g_signal_connect (job, "finished",
 231                                           G_CALLBACK (thumbnail_job_completed_callback),
 232                                           sidebar_thumbnails);
 233                         gtk_list_store_set (priv->list_store, &iter,
 234                                             COLUMN_JOB, job,
 235                                             -1);
 236                         /* The queue and the list own a ref to the job now */
 237                         g_object_unref (job);
 238                 } else if (job) {
 239                         g_object_unref (job);
 240                 }
 241         }
 242         gtk_tree_path_free (path);
 243 }
 244
 245 /* This modifies start */
 246 static void
 247 update_visible_range (EvSidebarThumbnails *sidebar_thumbnails,
 248                       gint                 start_page,
 249                       gint                 end_page)
 250 {
 251         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 252         int old_start_page, old_end_page;
 253
 254         old_start_page = priv->start_page;
 255         old_end_page = priv->end_page;
 256
 257         if (start_page == old_start_page &&
 258             end_page == old_end_page)
 259                 return;
 260
 261         /* Clear the areas we no longer display */
 262         if (old_start_page < start_page)
 263                 clear_range (sidebar_thumbnails, old_start_page, MIN (start_page - 1, old_end_page));
 264
 265         if (old_end_page > end_page)
 266                 clear_range (sidebar_thumbnails, MAX (end_page + 1, old_start_page), old_end_page);
 267
 268         add_range (sidebar_thumbnails, start_page, end_page);
 269
 270         priv->start_page = start_page;
 271         priv->end_page = end_page;
 272 }
 273
 274 static void
 275 adjustment_changed_cb (EvSidebarThumbnails *sidebar_thumbnails)
 276 {
 277         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 278         GtkTreePath *path = NULL;
 279         GtkTreePath *path2 = NULL;
 280         gint wy1;
 281         gint wy2;
 282
 283         if (priv->tree_view) {
 284                 if (! GTK_WIDGET_REALIZED (priv->tree_view))
 285                         return;
 286
 287                 gtk_tree_view_tree_to_widget_coords (GTK_TREE_VIEW (priv->tree_view),
 288                                                      0, (int) priv->vadjustment->value,
 289                                                      NULL, &wy1);
 290                 gtk_tree_view_tree_to_widget_coords (GTK_TREE_VIEW (priv->tree_view),
 291                                                      0, (int) (priv->vadjustment->value + priv->vadjustment->page_size),
 292                                                      NULL, &wy2);
 293                 gtk_tree_view_get_path_at_pos (GTK_TREE_VIEW (priv->tree_view),
 294                                                1, wy1 + 1, &path,
 295                                                NULL, NULL, NULL);
 296                 gtk_tree_view_get_path_at_pos (GTK_TREE_VIEW (priv->tree_view),
 297                                                1, wy2 -1, &path2,
 298                                                NULL, NULL, NULL);
 299         } else if (priv->icon_view) {
 300 #ifdef HAVE_GTK_ICON_VIEW_GET_VISIBLE_RANGE
 301                 if (! GTK_WIDGET_REALIZED (priv->icon_view))
 302                         return;
 303                 gtk_icon_view_get_visible_range (GTK_ICON_VIEW (priv->icon_view), &path, &path2);
 304 #else
 305                 g_assert_not_reached ();
 306 #endif
 307         } else {
 308                 return;
 309         }
 310
 311         if (path == NULL)
 312                 path = gtk_tree_path_new_first ();
 313         if (path2 == NULL)
 314                 path2 = gtk_tree_path_new_from_indices (priv->n_pages,
 315                                                         -1);
 316         update_visible_range (sidebar_thumbnails,
 317                               gtk_tree_path_get_indices (path)[0],
 318                               gtk_tree_path_get_indices (path2)[0]);
 319
 320         gtk_tree_path_free (path);
 321         gtk_tree_path_free (path2);
 322 }
 323
 324 static void
 325 ev_sidebar_thumbnails_fill_model (EvSidebarThumbnails *sidebar_thumbnails)
 326 {
 327         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 328         GtkTreeIter iter;
 329         int i;
 330
 331         for (i = 0; i < sidebar_thumbnails->priv->n_pages; i++) {
 332                 gchar *page_label;
 333                 gchar *page_string;
 334
 335                 page_label = ev_page_cache_get_page_label (priv->page_cache, i);
 336                 page_string = g_markup_printf_escaped ("<i>%s</i>", page_label);
 337
 338                 gtk_list_store_append (priv->list_store, &iter);
 339                 gtk_list_store_set (priv->list_store, &iter,
 340                                     COLUMN_PAGE_STRING, page_string,
 341                                     COLUMN_PIXBUF, priv->loading_icon,
 342                                     COLUMN_THUMBNAIL_SET, FALSE,
 343                                     -1);
 344                 g_free (page_label);
 345                 g_free (page_string);
 346         }
 347 }
 348
 349 void
 350 ev_sidebar_thumbnails_refresh (EvSidebarThumbnails *sidebar_thumbnails)
 351 {
 352         ev_sidebar_thumbnails_clear_model (sidebar_thumbnails);
 353         ev_sidebar_thumbnails_fill_model (sidebar_thumbnails);
 354         adjustment_changed_cb (sidebar_thumbnails);
 355 }
 356
 357 static void
 358 ev_sidebar_tree_selection_changed (GtkTreeSelection *selection,
 359                                    EvSidebarThumbnails *ev_sidebar_thumbnails)
 360 {
 361         EvSidebarThumbnailsPrivate *priv = ev_sidebar_thumbnails->priv;
 362         GtkTreePath *path;
 363         GtkTreeIter iter;
 364         int page;
 365
 366         if (!gtk_tree_selection_get_selected (selection, NULL, &iter))
 367                 return;
 368
 369         path = gtk_tree_model_get_path (GTK_TREE_MODEL (priv->list_store),
 370                                         &iter);
 371         page = gtk_tree_path_get_indices (path)[0];
 372         gtk_tree_path_free (path);
 373
 374         ev_page_cache_set_current_page (priv->page_cache, page);
 375 }
 376
 377 static void
 378 ev_sidebar_icon_selection_changed (GtkIconView         *icon_view,
 379                                    EvSidebarThumbnails *ev_sidebar_thumbnails)
 380 {
 381         EvSidebarThumbnailsPrivate *priv = ev_sidebar_thumbnails->priv;
 382         GtkTreePath *path;
 383         GList *selected;
 384         int page;
 385
 386         selected = gtk_icon_view_get_selected_items (icon_view);
 387         if (selected == NULL)
 388                 return;
 389
 390         /* We don't handle or expect multiple selection. */
 391         g_assert (selected->next == NULL);
 392
 393         path = selected->data;
 394         page = gtk_tree_path_get_indices (path)[0];
 395
 396         gtk_tree_path_free (path);
 397         g_list_free (selected);
 398
 399         ev_page_cache_set_current_page (priv->page_cache, page);
 400 }
 401
 402 static void
 403 ev_sidebar_init_tree_view (EvSidebarThumbnails *ev_sidebar_thumbnails)
 404 {
 405         EvSidebarThumbnailsPrivate *priv;
 406         GtkTreeSelection *selection;
 407         GtkCellRenderer *renderer;
 408
 409         priv = ev_sidebar_thumbnails->priv;
 410         priv->tree_view = gtk_tree_view_new_with_model (GTK_TREE_MODEL (priv->list_store));
 411
 412         selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (priv->tree_view));
 413         g_signal_connect (selection, "changed",
 414                           G_CALLBACK (ev_sidebar_tree_selection_changed), ev_sidebar_thumbnails);
 415         gtk_tree_view_set_headers_visible (GTK_TREE_VIEW (priv->tree_view), FALSE);
 416         renderer = g_object_new (GTK_TYPE_CELL_RENDERER_PIXBUF,
 417                                  "xpad", 2,
 418                                  "ypad", 2,
 419                                  NULL);
 420         gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (priv->tree_view), -1,
 421                                                      NULL, renderer,
 422                                                      "pixbuf", 1,
 423                                                      NULL);
 424         gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (priv->tree_view), -1,
 425                                                      NULL, gtk_cell_renderer_text_new (),
 426                                                      "markup", 0, NULL);
 427         gtk_container_add (GTK_CONTAINER (priv->swindow), priv->tree_view);
 428         gtk_widget_show (priv->tree_view);
 429 }
 430
 431 static void
 432 ev_sidebar_init_icon_view (EvSidebarThumbnails *ev_sidebar_thumbnails)
 433 {
 434         EvSidebarThumbnailsPrivate *priv;
 435
 436         priv = ev_sidebar_thumbnails->priv;
 437
 438         priv->icon_view = gtk_icon_view_new_with_model (GTK_TREE_MODEL (priv->list_store));
 439         gtk_icon_view_set_markup_column (GTK_ICON_VIEW (priv->icon_view), 0);
 440         gtk_icon_view_set_pixbuf_column (GTK_ICON_VIEW (priv->icon_view), 1);
 441         g_signal_connect (priv->icon_view, "selection-changed",
 442                           G_CALLBACK (ev_sidebar_icon_selection_changed), ev_sidebar_thumbnails);
 443
 444         gtk_container_add (GTK_CONTAINER (priv->swindow), priv->icon_view);
 445         gtk_widget_show (priv->icon_view);
 446 }
 447
 448 static gboolean
 449 ev_sidebar_thumbnails_use_icon_view (EvSidebarThumbnails *sidebar_thumbnails)
 450 {
 451 #ifdef HAVE_GTK_ICON_VIEW_GET_VISIBLE_RANGE
 452         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 453         if (ev_page_cache_get_n_pages (priv->page_cache) > MAX_ICON_VIEW_PAGE_COUNT)
 454                 return FALSE;
 455         return TRUE;
 456 #else
 457         return FALSE;
 458 #endif
 459 }
 460
 461 static void
 462 ev_sidebar_thumbnails_init (EvSidebarThumbnails *ev_sidebar_thumbnails)
 463 {
 464         EvSidebarThumbnailsPrivate *priv;
 465
 466         priv = ev_sidebar_thumbnails->priv = EV_SIDEBAR_THUMBNAILS_GET_PRIVATE (ev_sidebar_thumbnails);
 467
 468         priv->list_store = gtk_list_store_new (NUM_COLUMNS,
 469                                                G_TYPE_STRING,
 470                                                GDK_TYPE_PIXBUF,
 471                                                G_TYPE_BOOLEAN,
 472                                                EV_TYPE_JOB_THUMBNAIL);
 473
 474         priv->swindow = gtk_scrolled_window_new (NULL, NULL);
 475         gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (priv->swindow),
 476                                         GTK_POLICY_NEVER, GTK_POLICY_AUTOMATIC);
 477         gtk_scrolled_window_set_shadow_type (GTK_SCROLLED_WINDOW (priv->swindow),
 478                                              GTK_SHADOW_IN);
 479         priv->vadjustment = gtk_scrolled_window_get_vadjustment (GTK_SCROLLED_WINDOW (priv->swindow));
 480         g_signal_connect_data (G_OBJECT (priv->vadjustment), "value-changed",
 481                                G_CALLBACK (adjustment_changed_cb),
 482                                ev_sidebar_thumbnails, NULL,
 483                                G_CONNECT_SWAPPED | G_CONNECT_AFTER);
 484         g_signal_connect_swapped (G_OBJECT (priv->swindow), "size-allocate",
 485                                   G_CALLBACK (adjustment_changed_cb),
 486                                   ev_sidebar_thumbnails);
 487         gtk_box_pack_start (GTK_BOX (ev_sidebar_thumbnails), priv->swindow, TRUE, TRUE, 0);
 488
 489         /* Put it all together */
 490         gtk_widget_show_all (priv->swindow);
 491 }
 492
 493 static void
 494 page_changed_cb (EvPageCache         *page_cache,
 495                  int                  page,
 496                  EvSidebarThumbnails *sidebar)
 497 {
 498         GtkTreeView *tree_view;
 499         GtkTreePath *path;
 500
 501         path = gtk_tree_path_new_from_indices (page, -1);
 502
 503         if (sidebar->priv->tree_view) {
 504                 tree_view = GTK_TREE_VIEW (sidebar->priv->tree_view);
 505                 gtk_tree_view_set_cursor (tree_view, path, NULL, FALSE);
 506                 gtk_tree_view_scroll_to_cell (tree_view, path, NULL, FALSE, 0.0, 0.0);
 507         } else if (sidebar->priv->icon_view) {
 508                 /* Guard against gtk-2.6 */
 509 #ifdef HAVE_GTK_ICON_VIEW_GET_VISIBLE_RANGE
 510                 gtk_icon_view_select_path (GTK_ICON_VIEW (sidebar->priv->icon_view), path);
 511                 gtk_icon_view_set_cursor (GTK_ICON_VIEW (sidebar->priv->icon_view), path, NULL, FALSE);
 512 #endif
 513         }
 514
 515         gtk_tree_path_free (path);
 516 }
 517
 518 static void
 519 thumbnail_job_completed_callback (EvJobThumbnail      *job,
 520                                   EvSidebarThumbnails *sidebar_thumbnails)
 521 {
 522         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 523         GtkTreeIter *iter;
 524
 525         iter = (GtkTreeIter *) g_object_get_data (G_OBJECT (job), "tree_iter");
 526         gtk_list_store_set (priv->list_store,
 527                             iter,
 528                             COLUMN_PIXBUF, job->thumbnail,
 529                             COLUMN_THUMBNAIL_SET, TRUE,
 530                             COLUMN_JOB, NULL,
 531                             -1);
 532 }
 533
 534 static void
 535 ev_sidebar_thumbnails_set_document (EvSidebarPage       *sidebar_page,
 536                                     EvDocument          *document)
 537 {
 538         EvSidebarThumbnails *sidebar_thumbnails = EV_SIDEBAR_THUMBNAILS (sidebar_page);
 539         gint width = THUMBNAIL_WIDTH;
 540         gint height = THUMBNAIL_WIDTH;
 541
 542         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 543
 544         g_return_if_fail (EV_IS_DOCUMENT_THUMBNAILS (document));
 545
 546         priv->page_cache = ev_page_cache_get (document);
 547         priv->document = document;
 548         priv->n_pages = ev_page_cache_get_n_pages (priv->page_cache);
 549
 550         /* We get the dimensions of the first doc so that we can make a blank
 551          * icon.  */
 552         ev_document_doc_mutex_lock ();
 553         ev_document_thumbnails_get_dimensions (EV_DOCUMENT_THUMBNAILS (priv->document),
 554                                                0, THUMBNAIL_WIDTH, &width, &height);
 555         ev_document_doc_mutex_unlock ();
 556
 557         if (priv->loading_icon)
 558                 g_object_unref (priv->loading_icon);
 559         priv->loading_icon = ev_document_misc_get_thumbnail_frame (width, height, NULL);
 560
 561         ev_sidebar_thumbnails_clear_model (sidebar_thumbnails);
 562         ev_sidebar_thumbnails_fill_model (sidebar_thumbnails);
 563
 564         /* Create the view widget, and remove the old one, if needed */
 565         if (ev_sidebar_thumbnails_use_icon_view (sidebar_thumbnails)) {
 566                 if (priv->tree_view) {
 567                         gtk_container_remove (GTK_CONTAINER (priv->swindow), priv->tree_view);
 568                         priv->tree_view = NULL;
 569                 }
 570
 571                 if (! priv->icon_view) {
 572                         ev_sidebar_init_icon_view (sidebar_thumbnails);
 573                         g_object_notify (G_OBJECT (sidebar_thumbnails), "main_widget");
 574                 }
 575         } else {
 576                 if (priv->icon_view) {
 577                         gtk_container_remove (GTK_CONTAINER (priv->swindow), priv->icon_view);
 578                         priv->icon_view = NULL;
 579                 }
 580
 581                 if (! priv->tree_view) {
 582                         ev_sidebar_init_tree_view (sidebar_thumbnails);
 583                         g_object_notify (G_OBJECT (sidebar_thumbnails), "main_widget");
 584                 }
 585         }
 586
 587         /* Connect to the signal and trigger a fake callback */
 588         g_signal_connect (priv->page_cache, "page-changed", G_CALLBACK (page_changed_cb), sidebar_thumbnails);
 589         adjustment_changed_cb (sidebar_thumbnails);
 590 }
 591
 592 static gboolean
 593 ev_sidebar_thumbnails_clear_job (GtkTreeModel *model,
 594                                  GtkTreePath *path,
 595                                  GtkTreeIter *iter,
 596                                  gpointer data)
 597 {
 598     EvJob *job;
 599
 600     gtk_tree_model_get (model, iter, COLUMN_JOB, &job, -1);
 601
 602     if (job != NULL) {
 603         ev_job_queue_remove_job (job);
 604         g_signal_handlers_disconnect_by_func (job, thumbnail_job_completed_callback, data);
 605         g_object_unref (job);
 606     }
 607
 608     return FALSE;
 609 }
 610
 611 static void
 612 ev_sidebar_thumbnails_clear_model (EvSidebarThumbnails *sidebar_thumbnails)
 613 {
 614     EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 615
 616     gtk_tree_model_foreach (GTK_TREE_MODEL (priv->list_store), ev_sidebar_thumbnails_clear_job, sidebar_thumbnails);
 617     gtk_list_store_clear (priv->list_store);
 618 }
 619
 620 static gboolean
 621 ev_sidebar_thumbnails_support_document (EvSidebarPage   *sidebar_page,
 622                                         EvDocument *document)
 623 {
 624         return (EV_IS_DOCUMENT_THUMBNAILS (document) &&
 625                     (ev_document_get_n_pages (document) > 1));
 626 }
 627
 628 static const gchar*
 629 ev_sidebar_thumbnails_get_label (EvSidebarPage *sidebar_page)
 630 {
 631     return _("Thumbnails");
 632 }
 633
 634 static void
 635 ev_sidebar_thumbnails_page_iface_init (EvSidebarPageIface *iface)
 636 {
 637         iface->support_document = ev_sidebar_thumbnails_support_document;
 638         iface->set_document = ev_sidebar_thumbnails_set_document;
 639         iface->get_label = ev_sidebar_thumbnails_get_label;
 640 }
 641