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 gdouble
 224 get_scale_for_page (EvSidebarThumbnails *sidebar_thumbnails,
 225                     gint                 page)
 226 {
 227         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 228         gint width, height;
 229
 230         ev_page_cache_get_size (priv->page_cache,
 231                                 page, 0,
 232                                 1.0, &width, &height);
 233
 234         return (gdouble)THUMBNAIL_WIDTH / (gdouble)width;
 235 }
 236
 237 static void
 238 add_range (EvSidebarThumbnails *sidebar_thumbnails,
 239            gint                 start_page,
 240            gint                 end_page)
 241 {
 242         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 243         GtkTreePath *path;
 244         GtkTreeIter iter;
 245         gboolean result;
 246         gint page = start_page;
 247
 248         g_assert (start_page <= end_page);
 249
 250         path = gtk_tree_path_new_from_indices (start_page, -1);
 251         for (result = gtk_tree_model_get_iter (GTK_TREE_MODEL (priv->list_store), &iter, path);
 252              result && page <= end_page;
 253              result = gtk_tree_model_iter_next (GTK_TREE_MODEL (priv->list_store), &iter), page ++) {
 254                 EvJob *job;
 255                 gboolean thumbnail_set;
 256
 257                 gtk_tree_model_get (GTK_TREE_MODEL (priv->list_store), &iter,
 258                                     COLUMN_JOB, &job,
 259                                     COLUMN_THUMBNAIL_SET, &thumbnail_set,
 260                                     -1);
 261
 262                 if (job == NULL && !thumbnail_set) {
 263                         EvRenderContext *rc;
 264
 265                         rc = ev_render_context_new (priv->rotation, page,
 266                                                     get_scale_for_page (sidebar_thumbnails, page));
 267                         job = ev_job_thumbnail_new (priv->document, rc);
 268                         ev_job_queue_add_job (EV_JOB (job), EV_JOB_PRIORITY_HIGH);
 269                         g_object_unref (rc);
 270
 271                         g_object_set_data_full (G_OBJECT (job), "tree_iter",
 272                                                 gtk_tree_iter_copy (&iter),
 273                                                 (GDestroyNotify) gtk_tree_iter_free);
 274                         g_signal_connect (job, "finished",
 275                                           G_CALLBACK (thumbnail_job_completed_callback),
 276                                           sidebar_thumbnails);
 277                         gtk_list_store_set (priv->list_store, &iter,
 278                                             COLUMN_JOB, job,
 279                                             -1);
 280
 281                         /* The queue and the list own a ref to the job now */
 282                         g_object_unref (job);
 283                 } else if (job) {
 284                         g_object_unref (job);
 285                 }
 286         }
 287         gtk_tree_path_free (path);
 288 }
 289
 290 /* This modifies start */
 291 static void
 292 update_visible_range (EvSidebarThumbnails *sidebar_thumbnails,
 293                       gint                 start_page,
 294                       gint                 end_page)
 295 {
 296         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 297         int old_start_page, old_end_page;
 298
 299         old_start_page = priv->start_page;
 300         old_end_page = priv->end_page;
 301
 302         if (start_page == old_start_page &&
 303             end_page == old_end_page)
 304                 return;
 305
 306         /* Clear the areas we no longer display */
 307         if (old_start_page >= 0 && old_start_page < start_page)
 308                 clear_range (sidebar_thumbnails, old_start_page, MIN (start_page - 1, old_end_page));
 309
 310         if (old_end_page > 0 && old_end_page > end_page)
 311                 clear_range (sidebar_thumbnails, MAX (end_page + 1, old_start_page), old_end_page);
 312
 313         add_range (sidebar_thumbnails, start_page, end_page);
 314
 315         priv->start_page = start_page;
 316         priv->end_page = end_page;
 317 }
 318
 319 static void
 320 adjustment_changed_cb (EvSidebarThumbnails *sidebar_thumbnails)
 321 {
 322         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 323         GtkTreePath *path = NULL;
 324         GtkTreePath *path2 = NULL;
 325         gint wy1;
 326         gint wy2;
 327
 328         /* Widget is not currently visible */
 329         if (!GTK_WIDGET_MAPPED (sidebar_thumbnails))
 330                 return;
 331
 332         if (priv->tree_view) {
 333                 if (! GTK_WIDGET_REALIZED (priv->tree_view))
 334                         return;
 335
 336 #if GTK_CHECK_VERSION (2, 11, 3)
 337                 gtk_tree_view_convert_widget_to_bin_window_coords (GTK_TREE_VIEW (priv->tree_view),
 338                                                                    0, (int) priv->vadjustment->value,
 339                                                                    NULL, &wy1);
 340                 gtk_tree_view_convert_widget_to_bin_window_coords (GTK_TREE_VIEW (priv->tree_view),
 341                                                                    0, (int) (priv->vadjustment->value + priv->vadjustment->page_size),
 342                                                                    NULL, &wy2);
 343 #else
 344                 gtk_tree_view_tree_to_widget_coords (GTK_TREE_VIEW (priv->tree_view),
 345                                                      0, (int) priv->vadjustment->value,
 346                                                      NULL, &wy1);
 347                 gtk_tree_view_tree_to_widget_coords (GTK_TREE_VIEW (priv->tree_view),
 348                                                      0, (int) (priv->vadjustment->value + priv->vadjustment->page_size),
 349                                                      NULL, &wy2);
 350 #endif /* GTK_CHECK_VERSION (2, 11, 3) */
 351
 352                 gtk_tree_view_get_path_at_pos (GTK_TREE_VIEW (priv->tree_view),
 353                                                1, wy1 + 1, &path,
 354                                                NULL, NULL, NULL);
 355                 gtk_tree_view_get_path_at_pos (GTK_TREE_VIEW (priv->tree_view),
 356                                                1, wy2 -1, &path2,
 357                                                NULL, NULL, NULL);
 358         } else if (priv->icon_view) {
 359                 if (! GTK_WIDGET_REALIZED (priv->icon_view))
 360                         return;
 361                 if (! gtk_icon_view_get_visible_range (GTK_ICON_VIEW (priv->icon_view), &path, &path2))
 362                         return;
 363         } else {
 364                 return;
 365         }
 366
 367         if (path && path2) {
 368                 update_visible_range (sidebar_thumbnails,
 369                                       gtk_tree_path_get_indices (path)[0],
 370                                       gtk_tree_path_get_indices (path2)[0]);
 371         }
 372
 373         gtk_tree_path_free (path);
 374         gtk_tree_path_free (path2);
 375 }
 376
 377 static void
 378 ev_sidebar_thumbnails_fill_model (EvSidebarThumbnails *sidebar_thumbnails)
 379 {
 380         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 381         GtkTreeIter iter;
 382         int i;
 383
 384         for (i = 0; i < sidebar_thumbnails->priv->n_pages; i++) {
 385                 gchar *page_label;
 386                 gchar *page_string;
 387
 388                 page_label = ev_page_cache_get_page_label (priv->page_cache, i);
 389                 page_string = g_markup_printf_escaped ("<i>%s</i>", page_label);
 390
 391                 gtk_list_store_append (priv->list_store, &iter);
 392                 gtk_list_store_set (priv->list_store, &iter,
 393                                     COLUMN_PAGE_STRING, page_string,
 394                                     COLUMN_PIXBUF, priv->loading_icon,
 395                                     COLUMN_THUMBNAIL_SET, FALSE,
 396                                     -1);
 397                 g_free (page_label);
 398                 g_free (page_string);
 399         }
 400 }
 401
 402
 403 static void
 404 ev_sidebar_thumbnails_set_loading_icon (EvSidebarThumbnails *sidebar_thumbnails)
 405 {
 406         if (sidebar_thumbnails->priv->loading_icon)
 407                 g_object_unref (sidebar_thumbnails->priv->loading_icon);
 408
 409         if (sidebar_thumbnails->priv->document) {
 410                 gint width, height;
 411
 412                 /* We get the dimensions of the first page so that we can make a blank
 413                  * icon.  */
 414                 ev_page_cache_get_thumbnail_size (sidebar_thumbnails->priv->page_cache, 0,
 415                                                   sidebar_thumbnails->priv->rotation,
 416                                                   &width, &height);
 417
 418                 sidebar_thumbnails->priv->loading_icon =
 419                         ev_document_misc_get_thumbnail_frame (width, height, NULL);
 420         } else {
 421                 sidebar_thumbnails->priv->loading_icon = NULL;
 422         }
 423
 424 }
 425
 426 static gboolean
 427 refresh (EvSidebarThumbnails *sidebar_thumbnails)
 428 {
 429         adjustment_changed_cb (sidebar_thumbnails);
 430         return FALSE;
 431 }
 432
 433 void
 434 ev_sidebar_thumbnails_refresh (EvSidebarThumbnails *sidebar_thumbnails,
 435                                int                  rotation)
 436 {
 437         sidebar_thumbnails->priv->rotation = rotation;
 438         ev_sidebar_thumbnails_set_loading_icon (sidebar_thumbnails);
 439
 440         if (sidebar_thumbnails->priv->document == NULL)
 441                 return;
 442
 443         ev_sidebar_thumbnails_clear_model (sidebar_thumbnails);
 444         ev_sidebar_thumbnails_fill_model (sidebar_thumbnails);
 445
 446         /* Trigger a redraw */
 447         sidebar_thumbnails->priv->start_page = -1;
 448         sidebar_thumbnails->priv->end_page = -1;
 449         g_idle_add ((GSourceFunc)refresh, sidebar_thumbnails);
 450 }
 451
 452 static void
 453 ev_sidebar_tree_selection_changed (GtkTreeSelection *selection,
 454                                    EvSidebarThumbnails *ev_sidebar_thumbnails)
 455 {
 456         EvSidebarThumbnailsPrivate *priv = ev_sidebar_thumbnails->priv;
 457         GtkTreePath *path;
 458         GtkTreeIter iter;
 459         int page;
 460
 461         if (!gtk_tree_selection_get_selected (selection, NULL, &iter))
 462                 return;
 463
 464         path = gtk_tree_model_get_path (GTK_TREE_MODEL (priv->list_store),
 465                                         &iter);
 466         page = gtk_tree_path_get_indices (path)[0];
 467         gtk_tree_path_free (path);
 468
 469         ev_page_cache_set_current_page_history (priv->page_cache, page);
 470 }
 471
 472 static void
 473 ev_sidebar_icon_selection_changed (GtkIconView         *icon_view,
 474                                    EvSidebarThumbnails *ev_sidebar_thumbnails)
 475 {
 476         EvSidebarThumbnailsPrivate *priv = ev_sidebar_thumbnails->priv;
 477         GtkTreePath *path;
 478         GList *selected;
 479         int page;
 480
 481         selected = gtk_icon_view_get_selected_items (icon_view);
 482         if (selected == NULL)
 483                 return;
 484
 485         /* We don't handle or expect multiple selection. */
 486         g_assert (selected->next == NULL);
 487
 488         path = selected->data;
 489         page = gtk_tree_path_get_indices (path)[0];
 490
 491         gtk_tree_path_free (path);
 492         g_list_free (selected);
 493
 494         ev_page_cache_set_current_page_history (priv->page_cache, page);
 495 }
 496
 497 static void
 498 ev_sidebar_init_tree_view (EvSidebarThumbnails *ev_sidebar_thumbnails)
 499 {
 500         EvSidebarThumbnailsPrivate *priv;
 501         GtkTreeSelection *selection;
 502         GtkCellRenderer *renderer;
 503
 504         priv = ev_sidebar_thumbnails->priv;
 505         priv->tree_view = gtk_tree_view_new_with_model (GTK_TREE_MODEL (priv->list_store));
 506
 507         selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (priv->tree_view));
 508         g_signal_connect (selection, "changed",
 509                           G_CALLBACK (ev_sidebar_tree_selection_changed), ev_sidebar_thumbnails);
 510         gtk_tree_view_set_headers_visible (GTK_TREE_VIEW (priv->tree_view), FALSE);
 511         renderer = g_object_new (GTK_TYPE_CELL_RENDERER_PIXBUF,
 512                                  "xpad", 2,
 513                                  "ypad", 2,
 514                                  NULL);
 515         gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (priv->tree_view), -1,
 516                                                      NULL, renderer,
 517                                                      "pixbuf", 1,
 518                                                      NULL);
 519         gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (priv->tree_view), -1,
 520                                                      NULL, gtk_cell_renderer_text_new (),
 521                                                      "markup", 0, NULL);
 522         gtk_container_add (GTK_CONTAINER (priv->swindow), priv->tree_view);
 523         gtk_widget_show (priv->tree_view);
 524 }
 525
 526 static void
 527 ev_sidebar_init_icon_view (EvSidebarThumbnails *ev_sidebar_thumbnails)
 528 {
 529         EvSidebarThumbnailsPrivate *priv;
 530
 531         priv = ev_sidebar_thumbnails->priv;
 532
 533         priv->icon_view = gtk_icon_view_new_with_model (GTK_TREE_MODEL (priv->list_store));
 534         gtk_icon_view_set_markup_column (GTK_ICON_VIEW (priv->icon_view), 0);
 535         gtk_icon_view_set_pixbuf_column (GTK_ICON_VIEW (priv->icon_view), 1);
 536         g_signal_connect (priv->icon_view, "selection-changed",
 537                           G_CALLBACK (ev_sidebar_icon_selection_changed), ev_sidebar_thumbnails);
 538
 539         gtk_container_add (GTK_CONTAINER (priv->swindow), priv->icon_view);
 540         gtk_widget_show (priv->icon_view);
 541 }
 542
 543 static gboolean
 544 ev_sidebar_thumbnails_use_icon_view (EvSidebarThumbnails *sidebar_thumbnails)
 545 {
 546         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 547         if (ev_page_cache_get_n_pages (priv->page_cache) > MAX_ICON_VIEW_PAGE_COUNT)
 548                 return FALSE;
 549         return TRUE;
 550 }
 551
 552 static void
 553 ev_sidebar_thumbnails_init (EvSidebarThumbnails *ev_sidebar_thumbnails)
 554 {
 555         EvSidebarThumbnailsPrivate *priv;
 556
 557         priv = ev_sidebar_thumbnails->priv = EV_SIDEBAR_THUMBNAILS_GET_PRIVATE (ev_sidebar_thumbnails);
 558
 559         priv->list_store = gtk_list_store_new (NUM_COLUMNS,
 560                                                G_TYPE_STRING,
 561                                                GDK_TYPE_PIXBUF,
 562                                                G_TYPE_BOOLEAN,
 563                                                EV_TYPE_JOB_THUMBNAIL);
 564
 565         priv->swindow = gtk_scrolled_window_new (NULL, NULL);
 566
 567         /* We actually don't want GTK_POLICY_AUTOMATIC for horizontal scrollbar here
 568          * it's just a workaround for bug #449462
 569          */
 570         gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (priv->swindow),
 571                                         GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);
 572         gtk_scrolled_window_set_shadow_type (GTK_SCROLLED_WINDOW (priv->swindow),
 573                                              GTK_SHADOW_IN);
 574         priv->vadjustment = gtk_scrolled_window_get_vadjustment (GTK_SCROLLED_WINDOW (priv->swindow));
 575         g_signal_connect_data (G_OBJECT (priv->vadjustment), "value-changed",
 576                                G_CALLBACK (adjustment_changed_cb),
 577                                ev_sidebar_thumbnails, NULL,
 578                                G_CONNECT_SWAPPED | G_CONNECT_AFTER);
 579         g_signal_connect_swapped (G_OBJECT (priv->swindow), "size-allocate",
 580                                   G_CALLBACK (adjustment_changed_cb),
 581                                   ev_sidebar_thumbnails);
 582         gtk_box_pack_start (GTK_BOX (ev_sidebar_thumbnails), priv->swindow, TRUE, TRUE, 0);
 583
 584         /* Put it all together */
 585         gtk_widget_show_all (priv->swindow);
 586 }
 587
 588 static void
 589 page_changed_cb (EvPageCache         *page_cache,
 590                  int                  page,
 591                  EvSidebarThumbnails *sidebar)
 592 {
 593         GtkTreeView *tree_view;
 594         GtkTreePath *path;
 595
 596         path = gtk_tree_path_new_from_indices (page, -1);
 597
 598         if (sidebar->priv->tree_view) {
 599                 tree_view = GTK_TREE_VIEW (sidebar->priv->tree_view);
 600                 gtk_tree_view_set_cursor (tree_view, path, NULL, FALSE);
 601                 gtk_tree_view_scroll_to_cell (tree_view, path, NULL, FALSE, 0.0, 0.0);
 602         } else if (sidebar->priv->icon_view) {
 603
 604                 g_signal_handlers_block_by_func
 605                         (sidebar->priv->icon_view,
 606                          G_CALLBACK (ev_sidebar_icon_selection_changed), sidebar);
 607
 608                 gtk_icon_view_select_path (GTK_ICON_VIEW (sidebar->priv->icon_view), path);
 609
 610                 g_signal_handlers_unblock_by_func
 611                         (sidebar->priv->icon_view,
 612                          G_CALLBACK (ev_sidebar_icon_selection_changed), sidebar);
 613
 614                 gtk_icon_view_set_cursor (GTK_ICON_VIEW (sidebar->priv->icon_view), path, NULL, FALSE);
 615         }
 616
 617         gtk_tree_path_free (path);
 618 }
 619
 620 static void
 621 thumbnail_job_completed_callback (EvJobThumbnail      *job,
 622                                   EvSidebarThumbnails *sidebar_thumbnails)
 623 {
 624         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 625         GtkTreeIter *iter;
 626
 627         iter = (GtkTreeIter *) g_object_get_data (G_OBJECT (job), "tree_iter");
 628         gtk_list_store_set (priv->list_store,
 629                             iter,
 630                             COLUMN_PIXBUF, job->thumbnail,
 631                             COLUMN_THUMBNAIL_SET, TRUE,
 632                             COLUMN_JOB, NULL,
 633                             -1);
 634 }
 635
 636 static void
 637 ev_sidebar_thumbnails_set_document (EvSidebarPage       *sidebar_page,
 638                                     EvDocument          *document)
 639 {
 640         EvSidebarThumbnails *sidebar_thumbnails = EV_SIDEBAR_THUMBNAILS (sidebar_page);
 641
 642         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 643
 644         g_return_if_fail (EV_IS_DOCUMENT_THUMBNAILS (document));
 645
 646         priv->page_cache = ev_page_cache_get (document);
 647         priv->document = document;
 648         priv->n_pages = ev_page_cache_get_n_pages (priv->page_cache);
 649
 650         ev_sidebar_thumbnails_set_loading_icon (sidebar_thumbnails);
 651
 652         ev_sidebar_thumbnails_clear_model (sidebar_thumbnails);
 653         ev_sidebar_thumbnails_fill_model (sidebar_thumbnails);
 654
 655         /* Create the view widget, and remove the old one, if needed */
 656         if (ev_sidebar_thumbnails_use_icon_view (sidebar_thumbnails)) {
 657                 if (priv->tree_view) {
 658                         gtk_container_remove (GTK_CONTAINER (priv->swindow), priv->tree_view);
 659                         priv->tree_view = NULL;
 660                 }
 661
 662                 if (! priv->icon_view) {
 663                         ev_sidebar_init_icon_view (sidebar_thumbnails);
 664                         g_object_notify (G_OBJECT (sidebar_thumbnails), "main_widget");
 665                 } else {
 666                         gtk_widget_queue_resize (priv->icon_view);
 667                 }
 668         } else {
 669                 if (priv->icon_view) {
 670                         gtk_container_remove (GTK_CONTAINER (priv->swindow), priv->icon_view);
 671                         priv->icon_view = NULL;
 672                 }
 673
 674                 if (! priv->tree_view) {
 675                         ev_sidebar_init_tree_view (sidebar_thumbnails);
 676                         g_object_notify (G_OBJECT (sidebar_thumbnails), "main_widget");
 677                 }
 678         }
 679
 680         /* Connect to the signal and trigger a fake callback */
 681         g_signal_connect (priv->page_cache, "page-changed", G_CALLBACK (page_changed_cb), sidebar_thumbnails);
 682         sidebar_thumbnails->priv->start_page = -1;
 683         sidebar_thumbnails->priv->end_page = -1;
 684         page_changed_cb (priv->page_cache,
 685                          ev_page_cache_get_current_page (priv->page_cache),
 686                          sidebar_thumbnails);
 687         adjustment_changed_cb (sidebar_thumbnails);
 688 }
 689
 690 static gboolean
 691 ev_sidebar_thumbnails_clear_job (GtkTreeModel *model,
 692                                  GtkTreePath *path,
 693                                  GtkTreeIter *iter,
 694                                  gpointer data)
 695 {
 696         EvJob *job;
 697
 698         gtk_tree_model_get (model, iter, COLUMN_JOB, &job, -1);
 699
 700         if (job != NULL) {
 701                 ev_job_queue_remove_job (job);
 702                 g_signal_handlers_disconnect_by_func (job, thumbnail_job_completed_callback, data);
 703                 g_object_unref (job);
 704         }
 705
 706         return FALSE;
 707 }
 708
 709 static void
 710 ev_sidebar_thumbnails_clear_model (EvSidebarThumbnails *sidebar_thumbnails)
 711 {
 712         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 713
 714         gtk_tree_model_foreach (GTK_TREE_MODEL (priv->list_store), ev_sidebar_thumbnails_clear_job, sidebar_thumbnails);
 715         gtk_list_store_clear (priv->list_store);
 716 }
 717
 718 static gboolean
 719 ev_sidebar_thumbnails_support_document (EvSidebarPage   *sidebar_page,
 720                                         EvDocument *document)
 721 {
 722         return (EV_IS_DOCUMENT_THUMBNAILS (document));
 723 }
 724
 725 static const gchar*
 726 ev_sidebar_thumbnails_get_label (EvSidebarPage *sidebar_page)
 727 {
 728         return _("Thumbnails");
 729 }
 730
 731 static void
 732 ev_sidebar_thumbnails_page_iface_init (EvSidebarPageIface *iface)
 733 {
 734         iface->support_document = ev_sidebar_thumbnails_support_document;
 735         iface->set_document = ev_sidebar_thumbnails_set_document;
 736         iface->get_label = ev_sidebar_thumbnails_get_label;
 737 }
 738