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         int rotation;
  61
  62         /* Visible pages */
  63         gint start_page, end_page;
  64 };
  65
  66 enum {
  67         COLUMN_PAGE_STRING,
  68         COLUMN_PIXBUF,
  69         COLUMN_THUMBNAIL_SET,
  70         COLUMN_JOB,
  71         NUM_COLUMNS
  72 };
  73
  74 enum {
  75         PROP_0,
  76         PROP_WIDGET,
  77 };
  78
  79 static void         ev_sidebar_thumbnails_clear_model      (EvSidebarThumbnails *sidebar);
  80 static gboolean     ev_sidebar_thumbnails_support_document (EvSidebarPage       *sidebar_page,
  81                                                             EvDocument          *document);
  82 static void         ev_sidebar_thumbnails_page_iface_init  (EvSidebarPageIface  *iface);
  83 static void         ev_sidebar_thumbnails_set_document     (EvSidebarPage       *sidebar_page,
  84                                                             EvDocument          *document);
  85 static const gchar* ev_sidebar_thumbnails_get_label        (EvSidebarPage       *sidebar_page);
  86 static void         thumbnail_job_completed_callback       (EvJobThumbnail      *job,
  87                                                             EvSidebarThumbnails *sidebar_thumbnails);
  88 static void         adjustment_changed_cb                  (EvSidebarThumbnails *sidebar_thumbnails);
  89
  90 G_DEFINE_TYPE_EXTENDED (EvSidebarThumbnails,
  91                         ev_sidebar_thumbnails,
  92                         GTK_TYPE_VBOX,
  93                         0,
  94                         G_IMPLEMENT_INTERFACE (EV_TYPE_SIDEBAR_PAGE,
  95                                                ev_sidebar_thumbnails_page_iface_init))
  96
  97 #define EV_SIDEBAR_THUMBNAILS_GET_PRIVATE(object) \
  98         (G_TYPE_INSTANCE_GET_PRIVATE ((object), EV_TYPE_SIDEBAR_THUMBNAILS, EvSidebarThumbnailsPrivate));
  99
 100
 101 static void
 102 ev_sidebar_thumbnails_dispose (GObject *object)
 103 {
 104         EvSidebarThumbnails *sidebar_thumbnails = EV_SIDEBAR_THUMBNAILS (object);
 105
 106         if (sidebar_thumbnails->priv->loading_icon) {
 107                 g_object_unref (sidebar_thumbnails->priv->loading_icon);
 108                 sidebar_thumbnails->priv->loading_icon = NULL;
 109         }
 110
 111         if (sidebar_thumbnails->priv->list_store) {
 112                 ev_sidebar_thumbnails_clear_model (sidebar_thumbnails);
 113                 g_object_unref (sidebar_thumbnails->priv->list_store);
 114                 sidebar_thumbnails->priv->list_store = NULL;
 115         }
 116
 117         G_OBJECT_CLASS (ev_sidebar_thumbnails_parent_class)->dispose (object);
 118 }
 119
 120 static void
 121 ev_sidebar_thumbnails_get_property (GObject    *object,
 122                                     guint       prop_id,
 123                                     GValue     *value,
 124                                     GParamSpec *pspec)
 125 {
 126         EvSidebarThumbnails *sidebar = EV_SIDEBAR_THUMBNAILS (object);
 127
 128         switch (prop_id) {
 129         case PROP_WIDGET:
 130                 if (sidebar->priv->tree_view)
 131                         g_value_set_object (value, sidebar->priv->tree_view);
 132                 else
 133                         g_value_set_object (value, sidebar->priv->icon_view);
 134                 break;
 135         default:
 136                 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 137                 break;
 138         }
 139 }
 140
 141 static void
 142 ev_sidebar_thumbnails_map (GtkWidget *widget)
 143 {
 144         EvSidebarThumbnails *sidebar;
 145
 146         sidebar = EV_SIDEBAR_THUMBNAILS (widget);
 147
 148         GTK_WIDGET_CLASS (ev_sidebar_thumbnails_parent_class)->map (widget);
 149
 150         adjustment_changed_cb (sidebar);
 151 }
 152
 153 static void
 154 ev_sidebar_thumbnails_class_init (EvSidebarThumbnailsClass *ev_sidebar_thumbnails_class)
 155 {
 156         GObjectClass *g_object_class;
 157         GtkObjectClass *gtk_object_class;
 158         GtkWidgetClass *widget_class;
 159
 160         g_object_class = G_OBJECT_CLASS (ev_sidebar_thumbnails_class);
 161         gtk_object_class = GTK_OBJECT_CLASS (ev_sidebar_thumbnails_class);
 162         widget_class = GTK_WIDGET_CLASS (ev_sidebar_thumbnails_class);
 163
 164         g_object_class->dispose = ev_sidebar_thumbnails_dispose;
 165         g_object_class->get_property = ev_sidebar_thumbnails_get_property;
 166         widget_class->map = ev_sidebar_thumbnails_map;
 167
 168         g_object_class_override_property (g_object_class,
 169                                           PROP_WIDGET,
 170                                           "main-widget");
 171
 172         g_type_class_add_private (g_object_class, sizeof (EvSidebarThumbnailsPrivate));
 173 }
 174
 175 GtkWidget *
 176 ev_sidebar_thumbnails_new (void)
 177 {
 178         GtkWidget *ev_sidebar_thumbnails;
 179
 180         ev_sidebar_thumbnails = g_object_new (EV_TYPE_SIDEBAR_THUMBNAILS, NULL);
 181
 182         return ev_sidebar_thumbnails;
 183 }
 184
 185 static void
 186 clear_range (EvSidebarThumbnails *sidebar_thumbnails,
 187              gint                 start_page,
 188              gint                 end_page)
 189 {
 190         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 191         GtkTreePath *path;
 192         GtkTreeIter iter;
 193         gboolean result;
 194
 195         g_assert (start_page <= end_page);
 196
 197         path = gtk_tree_path_new_from_indices (start_page, -1);
 198         for (result = gtk_tree_model_get_iter (GTK_TREE_MODEL (priv->list_store), &iter, path);
 199              result && start_page <= end_page;
 200              result = gtk_tree_model_iter_next (GTK_TREE_MODEL (priv->list_store), &iter), start_page ++) {
 201                 EvJobThumbnail *job;
 202
 203                 gtk_tree_model_get (GTK_TREE_MODEL (priv->list_store),
 204                                     &iter,
 205                                     COLUMN_JOB, &job,
 206                                     -1);
 207
 208                 if (job) {
 209                         g_signal_handlers_disconnect_by_func (job, thumbnail_job_completed_callback, sidebar_thumbnails);
 210                         ev_job_queue_remove_job (EV_JOB (job));
 211                         g_object_unref (job);
 212                 }
 213
 214                 gtk_list_store_set (priv->list_store, &iter,
 215                                     COLUMN_JOB, NULL,
 216                                     COLUMN_THUMBNAIL_SET, FALSE,
 217                                     COLUMN_PIXBUF, priv->loading_icon,
 218                                     -1);
 219         }
 220         gtk_tree_path_free (path);
 221 }
 222
 223 static void
 224 add_range (EvSidebarThumbnails *sidebar_thumbnails,
 225            gint                 start_page,
 226            gint                 end_page)
 227 {
 228         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 229         GtkTreePath *path;
 230         GtkTreeIter iter;
 231         gboolean result;
 232         gint page = start_page;
 233
 234         g_assert (start_page <= end_page);
 235
 236         path = gtk_tree_path_new_from_indices (start_page, -1);
 237         for (result = gtk_tree_model_get_iter (GTK_TREE_MODEL (priv->list_store), &iter, path);
 238              result && page <= end_page;
 239              result = gtk_tree_model_iter_next (GTK_TREE_MODEL (priv->list_store), &iter), page ++) {
 240                 EvJobThumbnail *job;
 241                 gboolean thumbnail_set;
 242
 243                 gtk_tree_model_get (GTK_TREE_MODEL (priv->list_store), &iter,
 244                                     COLUMN_JOB, &job,
 245                                     COLUMN_THUMBNAIL_SET, &thumbnail_set,
 246                                     -1);
 247
 248                 if (job == NULL && !thumbnail_set) {
 249                         /* FIXME: Need rotation */
 250                         job = (EvJobThumbnail *)ev_job_thumbnail_new (priv->document, page, priv->rotation, THUMBNAIL_WIDTH);
 251                         ev_job_queue_add_job (EV_JOB (job), EV_JOB_PRIORITY_HIGH);
 252                         g_object_set_data_full (G_OBJECT (job), "tree_iter",
 253                                                 gtk_tree_iter_copy (&iter),
 254                                                 (GDestroyNotify) gtk_tree_iter_free);
 255                         g_signal_connect (job, "finished",
 256                                           G_CALLBACK (thumbnail_job_completed_callback),
 257                                           sidebar_thumbnails);
 258                         gtk_list_store_set (priv->list_store, &iter,
 259                                             COLUMN_JOB, job,
 260                                             -1);
 261                         /* The queue and the list own a ref to the job now */
 262                         g_object_unref (job);
 263                 } else if (job) {
 264                         g_object_unref (job);
 265                 }
 266         }
 267         gtk_tree_path_free (path);
 268 }
 269
 270 /* This modifies start */
 271 static void
 272 update_visible_range (EvSidebarThumbnails *sidebar_thumbnails,
 273                       gint                 start_page,
 274                       gint                 end_page)
 275 {
 276         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 277         int old_start_page, old_end_page;
 278
 279         old_start_page = priv->start_page;
 280         old_end_page = priv->end_page;
 281
 282         if (start_page == old_start_page &&
 283             end_page == old_end_page)
 284                 return;
 285
 286         /* Clear the areas we no longer display */
 287         if (old_start_page < start_page)
 288                 clear_range (sidebar_thumbnails, old_start_page, MIN (start_page - 1, old_end_page));
 289
 290         if (old_end_page > end_page)
 291                 clear_range (sidebar_thumbnails, MAX (end_page + 1, old_start_page), old_end_page);
 292
 293         add_range (sidebar_thumbnails, start_page, end_page);
 294
 295         priv->start_page = start_page;
 296         priv->end_page = end_page;
 297 }
 298
 299 static void
 300 adjustment_changed_cb (EvSidebarThumbnails *sidebar_thumbnails)
 301 {
 302         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 303         GtkTreePath *path = NULL;
 304         GtkTreePath *path2 = NULL;
 305         gint wy1;
 306         gint wy2;
 307
 308         /* Widget is not currently visible */
 309         if (!GTK_WIDGET_MAPPED (sidebar_thumbnails))
 310                 return;
 311
 312         if (priv->tree_view) {
 313                 if (! GTK_WIDGET_REALIZED (priv->tree_view))
 314                         return;
 315
 316                 gtk_tree_view_tree_to_widget_coords (GTK_TREE_VIEW (priv->tree_view),
 317                                                      0, (int) priv->vadjustment->value,
 318                                                      NULL, &wy1);
 319                 gtk_tree_view_tree_to_widget_coords (GTK_TREE_VIEW (priv->tree_view),
 320                                                      0, (int) (priv->vadjustment->value + priv->vadjustment->page_size),
 321                                                      NULL, &wy2);
 322                 gtk_tree_view_get_path_at_pos (GTK_TREE_VIEW (priv->tree_view),
 323                                                1, wy1 + 1, &path,
 324                                                NULL, NULL, NULL);
 325                 gtk_tree_view_get_path_at_pos (GTK_TREE_VIEW (priv->tree_view),
 326                                                1, wy2 -1, &path2,
 327                                                NULL, NULL, NULL);
 328         } else if (priv->icon_view) {
 329                 if (! GTK_WIDGET_REALIZED (priv->icon_view))
 330                         return;
 331                 if (! gtk_icon_view_get_visible_range (GTK_ICON_VIEW (priv->icon_view), &path, &path2))
 332                         return;
 333         } else {
 334                 return;
 335         }
 336
 337         if (path == NULL)
 338                 path = gtk_tree_path_new_first ();
 339         if (path2 == NULL)
 340                 path2 = gtk_tree_path_new_from_indices (priv->n_pages,
 341                                                         -1);
 342         update_visible_range (sidebar_thumbnails,
 343                               gtk_tree_path_get_indices (path)[0],
 344                               gtk_tree_path_get_indices (path2)[0]);
 345
 346         gtk_tree_path_free (path);
 347         gtk_tree_path_free (path2);
 348 }
 349
 350 static void
 351 ev_sidebar_thumbnails_fill_model (EvSidebarThumbnails *sidebar_thumbnails)
 352 {
 353         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 354         GtkTreeIter iter;
 355         int i;
 356
 357         for (i = 0; i < sidebar_thumbnails->priv->n_pages; i++) {
 358                 gchar *page_label;
 359                 gchar *page_string;
 360
 361                 page_label = ev_page_cache_get_page_label (priv->page_cache, i);
 362                 page_string = g_markup_printf_escaped ("<i>%s</i>", page_label);
 363
 364                 gtk_list_store_append (priv->list_store, &iter);
 365                 gtk_list_store_set (priv->list_store, &iter,
 366                                     COLUMN_PAGE_STRING, page_string,
 367                                     COLUMN_PIXBUF, priv->loading_icon,
 368                                     COLUMN_THUMBNAIL_SET, FALSE,
 369                                     -1);
 370                 g_free (page_label);
 371                 g_free (page_string);
 372         }
 373 }
 374
 375
 376 static void
 377 ev_sidebar_thumbnails_set_loading_icon (EvSidebarThumbnails *sidebar_thumbnails)
 378 {
 379         gint width = THUMBNAIL_WIDTH;
 380         gint height = THUMBNAIL_WIDTH;
 381
 382         if (sidebar_thumbnails->priv->loading_icon)
 383                 g_object_unref (sidebar_thumbnails->priv->loading_icon);
 384
 385         if (sidebar_thumbnails->priv->document) {
 386                 /* We get the dimensions of the first doc so that we can make a blank
 387                  * icon.  */
 388                 ev_document_doc_mutex_lock ();
 389                 ev_document_thumbnails_get_dimensions (EV_DOCUMENT_THUMBNAILS (sidebar_thumbnails->priv->document),
 390                                                        0, THUMBNAIL_WIDTH, &width, &height);
 391                 ev_document_doc_mutex_unlock ();
 392                 sidebar_thumbnails->priv->loading_icon =
 393                         ev_document_misc_get_thumbnail_frame (width, height, sidebar_thumbnails->priv->rotation, NULL);
 394         } else {
 395                 sidebar_thumbnails->priv->loading_icon = NULL;
 396         }
 397
 398 }
 399 void
 400 ev_sidebar_thumbnails_refresh (EvSidebarThumbnails *sidebar_thumbnails,
 401                                int                  rotation)
 402 {
 403         sidebar_thumbnails->priv->rotation = rotation;
 404         ev_sidebar_thumbnails_set_loading_icon (sidebar_thumbnails);
 405
 406         if (sidebar_thumbnails->priv->document == NULL)
 407                 return;
 408
 409         ev_sidebar_thumbnails_clear_model (sidebar_thumbnails);
 410         ev_sidebar_thumbnails_fill_model (sidebar_thumbnails);
 411
 412         /* Trigger a redraw */
 413         sidebar_thumbnails->priv->start_page = 0;
 414         sidebar_thumbnails->priv->end_page = 0;
 415         adjustment_changed_cb (sidebar_thumbnails);
 416 }
 417
 418 static void
 419 ev_sidebar_tree_selection_changed (GtkTreeSelection *selection,
 420                                    EvSidebarThumbnails *ev_sidebar_thumbnails)
 421 {
 422         EvSidebarThumbnailsPrivate *priv = ev_sidebar_thumbnails->priv;
 423         GtkTreePath *path;
 424         GtkTreeIter iter;
 425         int page;
 426
 427         if (!gtk_tree_selection_get_selected (selection, NULL, &iter))
 428                 return;
 429
 430         path = gtk_tree_model_get_path (GTK_TREE_MODEL (priv->list_store),
 431                                         &iter);
 432         page = gtk_tree_path_get_indices (path)[0];
 433         gtk_tree_path_free (path);
 434
 435         ev_page_cache_set_current_page (priv->page_cache, page);
 436 }
 437
 438 static void
 439 ev_sidebar_icon_selection_changed (GtkIconView         *icon_view,
 440                                    EvSidebarThumbnails *ev_sidebar_thumbnails)
 441 {
 442         EvSidebarThumbnailsPrivate *priv = ev_sidebar_thumbnails->priv;
 443         GtkTreePath *path;
 444         GList *selected;
 445         int page;
 446
 447         selected = gtk_icon_view_get_selected_items (icon_view);
 448         if (selected == NULL)
 449                 return;
 450
 451         /* We don't handle or expect multiple selection. */
 452         g_assert (selected->next == NULL);
 453
 454         path = selected->data;
 455         page = gtk_tree_path_get_indices (path)[0];
 456
 457         gtk_tree_path_free (path);
 458         g_list_free (selected);
 459
 460         ev_page_cache_set_current_page (priv->page_cache, page);
 461 }
 462
 463 static void
 464 ev_sidebar_init_tree_view (EvSidebarThumbnails *ev_sidebar_thumbnails)
 465 {
 466         EvSidebarThumbnailsPrivate *priv;
 467         GtkTreeSelection *selection;
 468         GtkCellRenderer *renderer;
 469
 470         priv = ev_sidebar_thumbnails->priv;
 471         priv->tree_view = gtk_tree_view_new_with_model (GTK_TREE_MODEL (priv->list_store));
 472
 473         selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (priv->tree_view));
 474         g_signal_connect (selection, "changed",
 475                           G_CALLBACK (ev_sidebar_tree_selection_changed), ev_sidebar_thumbnails);
 476         gtk_tree_view_set_headers_visible (GTK_TREE_VIEW (priv->tree_view), FALSE);
 477         renderer = g_object_new (GTK_TYPE_CELL_RENDERER_PIXBUF,
 478                                  "xpad", 2,
 479                                  "ypad", 2,
 480                                  NULL);
 481         gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (priv->tree_view), -1,
 482                                                      NULL, renderer,
 483                                                      "pixbuf", 1,
 484                                                      NULL);
 485         gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (priv->tree_view), -1,
 486                                                      NULL, gtk_cell_renderer_text_new (),
 487                                                      "markup", 0, NULL);
 488         gtk_container_add (GTK_CONTAINER (priv->swindow), priv->tree_view);
 489         gtk_widget_show (priv->tree_view);
 490 }
 491
 492 static void
 493 ev_sidebar_init_icon_view (EvSidebarThumbnails *ev_sidebar_thumbnails)
 494 {
 495         EvSidebarThumbnailsPrivate *priv;
 496
 497         priv = ev_sidebar_thumbnails->priv;
 498
 499         priv->icon_view = gtk_icon_view_new_with_model (GTK_TREE_MODEL (priv->list_store));
 500         gtk_icon_view_set_markup_column (GTK_ICON_VIEW (priv->icon_view), 0);
 501         gtk_icon_view_set_pixbuf_column (GTK_ICON_VIEW (priv->icon_view), 1);
 502         g_signal_connect (priv->icon_view, "selection-changed",
 503                           G_CALLBACK (ev_sidebar_icon_selection_changed), ev_sidebar_thumbnails);
 504
 505         gtk_container_add (GTK_CONTAINER (priv->swindow), priv->icon_view);
 506         gtk_widget_show (priv->icon_view);
 507 }
 508
 509 static gboolean
 510 ev_sidebar_thumbnails_use_icon_view (EvSidebarThumbnails *sidebar_thumbnails)
 511 {
 512         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 513         if (ev_page_cache_get_n_pages (priv->page_cache) > MAX_ICON_VIEW_PAGE_COUNT)
 514                 return FALSE;
 515         return TRUE;
 516 }
 517
 518 static void
 519 ev_sidebar_thumbnails_init (EvSidebarThumbnails *ev_sidebar_thumbnails)
 520 {
 521         EvSidebarThumbnailsPrivate *priv;
 522
 523         priv = ev_sidebar_thumbnails->priv = EV_SIDEBAR_THUMBNAILS_GET_PRIVATE (ev_sidebar_thumbnails);
 524
 525         priv->list_store = gtk_list_store_new (NUM_COLUMNS,
 526                                                G_TYPE_STRING,
 527                                                GDK_TYPE_PIXBUF,
 528                                                G_TYPE_BOOLEAN,
 529                                                EV_TYPE_JOB_THUMBNAIL);
 530
 531         priv->swindow = gtk_scrolled_window_new (NULL, NULL);
 532         gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (priv->swindow),
 533                                         GTK_POLICY_NEVER, GTK_POLICY_AUTOMATIC);
 534         gtk_scrolled_window_set_shadow_type (GTK_SCROLLED_WINDOW (priv->swindow),
 535                                              GTK_SHADOW_IN);
 536         priv->vadjustment = gtk_scrolled_window_get_vadjustment (GTK_SCROLLED_WINDOW (priv->swindow));
 537         g_signal_connect_data (G_OBJECT (priv->vadjustment), "value-changed",
 538                                G_CALLBACK (adjustment_changed_cb),
 539                                ev_sidebar_thumbnails, NULL,
 540                                G_CONNECT_SWAPPED | G_CONNECT_AFTER);
 541         g_signal_connect_swapped (G_OBJECT (priv->swindow), "size-allocate",
 542                                   G_CALLBACK (adjustment_changed_cb),
 543                                   ev_sidebar_thumbnails);
 544         gtk_box_pack_start (GTK_BOX (ev_sidebar_thumbnails), priv->swindow, TRUE, TRUE, 0);
 545
 546         /* Put it all together */
 547         gtk_widget_show_all (priv->swindow);
 548 }
 549
 550 static void
 551 page_changed_cb (EvPageCache         *page_cache,
 552                  int                  page,
 553                  EvSidebarThumbnails *sidebar)
 554 {
 555         GtkTreeView *tree_view;
 556         GtkTreePath *path;
 557
 558         path = gtk_tree_path_new_from_indices (page, -1);
 559
 560         if (sidebar->priv->tree_view) {
 561                 tree_view = GTK_TREE_VIEW (sidebar->priv->tree_view);
 562                 gtk_tree_view_set_cursor (tree_view, path, NULL, FALSE);
 563                 gtk_tree_view_scroll_to_cell (tree_view, path, NULL, FALSE, 0.0, 0.0);
 564         } else if (sidebar->priv->icon_view) {
 565                 gtk_icon_view_select_path (GTK_ICON_VIEW (sidebar->priv->icon_view), path);
 566                 gtk_icon_view_set_cursor (GTK_ICON_VIEW (sidebar->priv->icon_view), path, NULL, FALSE);
 567         }
 568
 569         gtk_tree_path_free (path);
 570 }
 571
 572 static void
 573 thumbnail_job_completed_callback (EvJobThumbnail      *job,
 574                                   EvSidebarThumbnails *sidebar_thumbnails)
 575 {
 576         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 577         GtkTreeIter *iter;
 578
 579         iter = (GtkTreeIter *) g_object_get_data (G_OBJECT (job), "tree_iter");
 580         gtk_list_store_set (priv->list_store,
 581                             iter,
 582                             COLUMN_PIXBUF, job->thumbnail,
 583                             COLUMN_THUMBNAIL_SET, TRUE,
 584                             COLUMN_JOB, NULL,
 585                             -1);
 586 }
 587
 588 static void
 589 ev_sidebar_thumbnails_set_document (EvSidebarPage       *sidebar_page,
 590                                     EvDocument          *document)
 591 {
 592         EvSidebarThumbnails *sidebar_thumbnails = EV_SIDEBAR_THUMBNAILS (sidebar_page);
 593
 594         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 595
 596         g_return_if_fail (EV_IS_DOCUMENT_THUMBNAILS (document));
 597
 598         priv->page_cache = ev_page_cache_get (document);
 599         priv->document = document;
 600         priv->n_pages = ev_page_cache_get_n_pages (priv->page_cache);
 601
 602         ev_sidebar_thumbnails_set_loading_icon (sidebar_thumbnails);
 603
 604         ev_sidebar_thumbnails_clear_model (sidebar_thumbnails);
 605         ev_sidebar_thumbnails_fill_model (sidebar_thumbnails);
 606
 607         /* Create the view widget, and remove the old one, if needed */
 608         if (ev_sidebar_thumbnails_use_icon_view (sidebar_thumbnails)) {
 609                 if (priv->tree_view) {
 610                         gtk_container_remove (GTK_CONTAINER (priv->swindow), priv->tree_view);
 611                         priv->tree_view = NULL;
 612                 }
 613
 614                 if (! priv->icon_view) {
 615                         ev_sidebar_init_icon_view (sidebar_thumbnails);
 616                         g_object_notify (G_OBJECT (sidebar_thumbnails), "main_widget");
 617                 } else {
 618                         gtk_widget_queue_resize (priv->icon_view);
 619                 }
 620         } else {
 621                 if (priv->icon_view) {
 622                         gtk_container_remove (GTK_CONTAINER (priv->swindow), priv->icon_view);
 623                         priv->icon_view = NULL;
 624                 }
 625
 626                 if (! priv->tree_view) {
 627                         ev_sidebar_init_tree_view (sidebar_thumbnails);
 628                         g_object_notify (G_OBJECT (sidebar_thumbnails), "main_widget");
 629                 }
 630         }
 631
 632         /* Connect to the signal and trigger a fake callback */
 633         g_signal_connect (priv->page_cache, "page-changed", G_CALLBACK (page_changed_cb), sidebar_thumbnails);
 634         sidebar_thumbnails->priv->start_page = 0;
 635         sidebar_thumbnails->priv->end_page = 0;
 636         adjustment_changed_cb (sidebar_thumbnails);
 637 }
 638
 639 static gboolean
 640 ev_sidebar_thumbnails_clear_job (GtkTreeModel *model,
 641                                  GtkTreePath *path,
 642                                  GtkTreeIter *iter,
 643                                  gpointer data)
 644 {
 645     EvJob *job;
 646
 647     gtk_tree_model_get (model, iter, COLUMN_JOB, &job, -1);
 648
 649     if (job != NULL) {
 650         ev_job_queue_remove_job (job);
 651         g_signal_handlers_disconnect_by_func (job, thumbnail_job_completed_callback, data);
 652         g_object_unref (job);
 653     }
 654
 655     return FALSE;
 656 }
 657
 658 static void
 659 ev_sidebar_thumbnails_clear_model (EvSidebarThumbnails *sidebar_thumbnails)
 660 {
 661     EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 662
 663     gtk_tree_model_foreach (GTK_TREE_MODEL (priv->list_store), ev_sidebar_thumbnails_clear_job, sidebar_thumbnails);
 664     gtk_list_store_clear (priv->list_store);
 665 }
 666
 667 static gboolean
 668 ev_sidebar_thumbnails_support_document (EvSidebarPage   *sidebar_page,
 669                                         EvDocument *document)
 670 {
 671         return (EV_IS_DOCUMENT_THUMBNAILS (document) &&
 672                     (ev_document_get_n_pages (document) > 1));
 673 }
 674
 675 static const gchar*
 676 ev_sidebar_thumbnails_get_label (EvSidebarPage *sidebar_page)
 677 {
 678     return _("Thumbnails");
 679 }
 680
 681 static void
 682 ev_sidebar_thumbnails_page_iface_init (EvSidebarPageIface *iface)
 683 {
 684         iface->support_document = ev_sidebar_thumbnails_support_document;
 685         iface->set_document = ev_sidebar_thumbnails_set_document;
 686         iface->get_label = ev_sidebar_thumbnails_get_label;
 687 }
 688