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
  31 #include <glib/gi18n.h>
  32 #include <gtk/gtk.h>
  33
  34 #include "ev-document-misc.h"
  35 #include "ev-document-thumbnails.h"
  36 #include "ev-job-scheduler.h"
  37 #include "ev-sidebar-page.h"
  38 #include "ev-sidebar-thumbnails.h"
  39 #include "ev-utils.h"
  40 #include "ev-window.h"
  41
  42 #define THUMBNAIL_WIDTH 100
  43
  44 /* The IconView doesn't scale nearly as well as the TreeView, so we arbitrarily
  45  * limit its use */
  46 #define MAX_ICON_VIEW_PAGE_COUNT 1500
  47
  48
  49 struct _EvSidebarThumbnailsPrivate {
  50         GtkWidget *swindow;
  51         GtkWidget *icon_view;
  52         GtkWidget *tree_view;
  53         GtkAdjustment *vadjustment;
  54         GtkListStore *list_store;
  55         GHashTable *loading_icons;
  56         EvDocument *document;
  57         EvPageCache *page_cache;
  58
  59         gint n_pages, pages_done;
  60
  61         int rotation;
  62
  63         /* Visible pages */
  64         gint start_page, end_page;
  65 };
  66
  67 enum {
  68         COLUMN_PAGE_STRING,
  69         COLUMN_PIXBUF,
  70         COLUMN_THUMBNAIL_SET,
  71         COLUMN_JOB,
  72         NUM_COLUMNS
  73 };
  74
  75 enum {
  76         PROP_0,
  77         PROP_WIDGET,
  78 };
  79
  80 static void         ev_sidebar_thumbnails_clear_model      (EvSidebarThumbnails *sidebar);
  81 static gboolean     ev_sidebar_thumbnails_support_document (EvSidebarPage       *sidebar_page,
  82                                                             EvDocument          *document);
  83 static void         ev_sidebar_thumbnails_page_iface_init  (EvSidebarPageIface  *iface);
  84 static void         ev_sidebar_thumbnails_set_document     (EvSidebarPage       *sidebar_page,
  85                                                             EvDocument          *document);
  86 static const gchar* ev_sidebar_thumbnails_get_label        (EvSidebarPage       *sidebar_page);
  87 static void         thumbnail_job_completed_callback       (EvJobThumbnail      *job,
  88                                                             EvSidebarThumbnails *sidebar_thumbnails);
  89 static void         adjustment_changed_cb                  (EvSidebarThumbnails *sidebar_thumbnails);
  90
  91 G_DEFINE_TYPE_EXTENDED (EvSidebarThumbnails,
  92                         ev_sidebar_thumbnails,
  93                         GTK_TYPE_VBOX,
  94                         0,
  95                         G_IMPLEMENT_INTERFACE (EV_TYPE_SIDEBAR_PAGE,
  96                                                ev_sidebar_thumbnails_page_iface_init))
  97
  98 #define EV_SIDEBAR_THUMBNAILS_GET_PRIVATE(object) \
  99         (G_TYPE_INSTANCE_GET_PRIVATE ((object), EV_TYPE_SIDEBAR_THUMBNAILS, EvSidebarThumbnailsPrivate));
 100
 101
 102 static void
 103 ev_sidebar_thumbnails_dispose (GObject *object)
 104 {
 105         EvSidebarThumbnails *sidebar_thumbnails = EV_SIDEBAR_THUMBNAILS (object);
 106
 107         if (sidebar_thumbnails->priv->loading_icons) {
 108                 g_hash_table_destroy (sidebar_thumbnails->priv->loading_icons);
 109                 sidebar_thumbnails->priv->loading_icons = NULL;
 110         }
 111
 112         if (sidebar_thumbnails->priv->list_store) {
 113                 ev_sidebar_thumbnails_clear_model (sidebar_thumbnails);
 114                 g_object_unref (sidebar_thumbnails->priv->list_store);
 115                 sidebar_thumbnails->priv->list_store = NULL;
 116         }
 117
 118         G_OBJECT_CLASS (ev_sidebar_thumbnails_parent_class)->dispose (object);
 119 }
 120
 121 static void
 122 ev_sidebar_thumbnails_get_property (GObject    *object,
 123                                     guint       prop_id,
 124                                     GValue     *value,
 125                                     GParamSpec *pspec)
 126 {
 127         EvSidebarThumbnails *sidebar = EV_SIDEBAR_THUMBNAILS (object);
 128
 129         switch (prop_id) {
 130         case PROP_WIDGET:
 131                 if (sidebar->priv->tree_view)
 132                         g_value_set_object (value, sidebar->priv->tree_view);
 133                 else
 134                         g_value_set_object (value, sidebar->priv->icon_view);
 135                 break;
 136         default:
 137                 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 138                 break;
 139         }
 140 }
 141
 142 static void
 143 ev_sidebar_thumbnails_map (GtkWidget *widget)
 144 {
 145         EvSidebarThumbnails *sidebar;
 146
 147         sidebar = EV_SIDEBAR_THUMBNAILS (widget);
 148
 149         GTK_WIDGET_CLASS (ev_sidebar_thumbnails_parent_class)->map (widget);
 150
 151         adjustment_changed_cb (sidebar);
 152 }
 153
 154 static void
 155 ev_sidebar_thumbnails_class_init (EvSidebarThumbnailsClass *ev_sidebar_thumbnails_class)
 156 {
 157         GObjectClass *g_object_class;
 158         GtkObjectClass *gtk_object_class;
 159         GtkWidgetClass *widget_class;
 160
 161         g_object_class = G_OBJECT_CLASS (ev_sidebar_thumbnails_class);
 162         gtk_object_class = GTK_OBJECT_CLASS (ev_sidebar_thumbnails_class);
 163         widget_class = GTK_WIDGET_CLASS (ev_sidebar_thumbnails_class);
 164
 165         g_object_class->dispose = ev_sidebar_thumbnails_dispose;
 166         g_object_class->get_property = ev_sidebar_thumbnails_get_property;
 167         widget_class->map = ev_sidebar_thumbnails_map;
 168
 169         g_object_class_override_property (g_object_class,
 170                                           PROP_WIDGET,
 171                                           "main-widget");
 172
 173         g_type_class_add_private (g_object_class, sizeof (EvSidebarThumbnailsPrivate));
 174 }
 175
 176 GtkWidget *
 177 ev_sidebar_thumbnails_new (void)
 178 {
 179         GtkWidget *ev_sidebar_thumbnails;
 180
 181         ev_sidebar_thumbnails = g_object_new (EV_TYPE_SIDEBAR_THUMBNAILS, NULL);
 182
 183         return ev_sidebar_thumbnails;
 184 }
 185
 186 static GdkPixbuf *
 187 ev_sidebar_thumbnails_get_loading_icon (EvSidebarThumbnails *sidebar_thumbnails,
 188                                         gint                 width,
 189                                         gint                 height)
 190 {
 191         GdkPixbuf *icon;
 192         gchar     *key;
 193
 194         key = g_strdup_printf ("%dx%d", width, height);
 195         icon = g_hash_table_lookup (sidebar_thumbnails->priv->loading_icons, key);
 196         if (!icon) {
 197                 icon = ev_document_misc_get_thumbnail_frame (width, height, NULL);
 198                 g_hash_table_insert (sidebar_thumbnails->priv->loading_icons,
 199                                      key, icon);
 200         } else {
 201                 g_free (key);
 202         }
 203
 204         return icon;
 205 }
 206
 207 static void
 208 clear_range (EvSidebarThumbnails *sidebar_thumbnails,
 209              gint                 start_page,
 210              gint                 end_page)
 211 {
 212         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 213         GtkTreePath *path;
 214         GtkTreeIter iter;
 215         gboolean result;
 216         gint prev_width = -1;
 217         gint prev_height = -1;
 218
 219         g_assert (start_page <= end_page);
 220
 221         path = gtk_tree_path_new_from_indices (start_page, -1);
 222         for (result = gtk_tree_model_get_iter (GTK_TREE_MODEL (priv->list_store), &iter, path);
 223              result && start_page <= end_page;
 224              result = gtk_tree_model_iter_next (GTK_TREE_MODEL (priv->list_store), &iter), start_page ++) {
 225                 EvJobThumbnail *job;
 226                 GdkPixbuf *loading_icon = NULL;
 227                 gint width, height;
 228
 229                 gtk_tree_model_get (GTK_TREE_MODEL (priv->list_store),
 230                                     &iter,
 231                                     COLUMN_JOB, &job,
 232                                     -1);
 233
 234                 if (job) {
 235                         g_signal_handlers_disconnect_by_func (job, thumbnail_job_completed_callback, sidebar_thumbnails);
 236                         ev_job_cancel (EV_JOB (job));
 237                         g_object_unref (job);
 238                 }
 239
 240                 ev_page_cache_get_thumbnail_size (priv->page_cache, start_page,
 241                                                   priv->rotation,
 242                                                   &width, &height);
 243                 if (!loading_icon || (width != prev_width && height != prev_height)) {
 244                         loading_icon =
 245                                 ev_sidebar_thumbnails_get_loading_icon (sidebar_thumbnails,
 246                                                                         width, height);
 247                 }
 248
 249                 prev_width = width;
 250                 prev_height = height;
 251
 252                 gtk_list_store_set (priv->list_store, &iter,
 253                                     COLUMN_JOB, NULL,
 254                                     COLUMN_THUMBNAIL_SET, FALSE,
 255                                     COLUMN_PIXBUF, loading_icon,
 256                                     -1);
 257         }
 258         gtk_tree_path_free (path);
 259 }
 260
 261 static gdouble
 262 get_scale_for_page (EvSidebarThumbnails *sidebar_thumbnails,
 263                     gint                 page)
 264 {
 265         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 266         gint width, height;
 267
 268         ev_page_cache_get_size (priv->page_cache,
 269                                 page, 0,
 270                                 1.0, &width, &height);
 271
 272         return (gdouble)THUMBNAIL_WIDTH / (gdouble)width;
 273 }
 274
 275 static void
 276 add_range (EvSidebarThumbnails *sidebar_thumbnails,
 277            gint                 start_page,
 278            gint                 end_page)
 279 {
 280         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 281         GtkTreePath *path;
 282         GtkTreeIter iter;
 283         gboolean result;
 284         gint page = start_page;
 285
 286         g_assert (start_page <= end_page);
 287
 288         path = gtk_tree_path_new_from_indices (start_page, -1);
 289         for (result = gtk_tree_model_get_iter (GTK_TREE_MODEL (priv->list_store), &iter, path);
 290              result && page <= end_page;
 291              result = gtk_tree_model_iter_next (GTK_TREE_MODEL (priv->list_store), &iter), page ++) {
 292                 EvJob *job;
 293                 gboolean thumbnail_set;
 294
 295                 gtk_tree_model_get (GTK_TREE_MODEL (priv->list_store), &iter,
 296                                     COLUMN_JOB, &job,
 297                                     COLUMN_THUMBNAIL_SET, &thumbnail_set,
 298                                     -1);
 299
 300                 if (job == NULL && !thumbnail_set) {
 301                         job = ev_job_thumbnail_new (priv->document,
 302                                                     page, priv->rotation,
 303                                                     get_scale_for_page (sidebar_thumbnails, page));
 304                         ev_job_scheduler_push_job (EV_JOB (job), EV_JOB_PRIORITY_HIGH);
 305
 306                         g_object_set_data_full (G_OBJECT (job), "tree_iter",
 307                                                 gtk_tree_iter_copy (&iter),
 308                                                 (GDestroyNotify) gtk_tree_iter_free);
 309                         g_signal_connect (job, "finished",
 310                                           G_CALLBACK (thumbnail_job_completed_callback),
 311                                           sidebar_thumbnails);
 312                         gtk_list_store_set (priv->list_store, &iter,
 313                                             COLUMN_JOB, job,
 314                                             -1);
 315
 316                         /* The queue and the list own a ref to the job now */
 317                         g_object_unref (job);
 318                 } else if (job) {
 319                         g_object_unref (job);
 320                 }
 321         }
 322         gtk_tree_path_free (path);
 323 }
 324
 325 /* This modifies start */
 326 static void
 327 update_visible_range (EvSidebarThumbnails *sidebar_thumbnails,
 328                       gint                 start_page,
 329                       gint                 end_page)
 330 {
 331         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 332         int old_start_page, old_end_page;
 333
 334         old_start_page = priv->start_page;
 335         old_end_page = priv->end_page;
 336
 337         if (start_page == old_start_page &&
 338             end_page == old_end_page)
 339                 return;
 340
 341         /* Clear the areas we no longer display */
 342         if (old_start_page >= 0 && old_start_page < start_page)
 343                 clear_range (sidebar_thumbnails, old_start_page, MIN (start_page - 1, old_end_page));
 344
 345         if (old_end_page > 0 && old_end_page > end_page)
 346                 clear_range (sidebar_thumbnails, MAX (end_page + 1, old_start_page), old_end_page);
 347
 348         add_range (sidebar_thumbnails, start_page, end_page);
 349
 350         priv->start_page = start_page;
 351         priv->end_page = end_page;
 352 }
 353
 354 static void
 355 adjustment_changed_cb (EvSidebarThumbnails *sidebar_thumbnails)
 356 {
 357         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 358         GtkTreePath *path = NULL;
 359         GtkTreePath *path2 = NULL;
 360         gint wy1;
 361         gint wy2;
 362
 363         /* Widget is not currently visible */
 364         if (!GTK_WIDGET_MAPPED (sidebar_thumbnails))
 365                 return;
 366
 367         if (priv->vadjustment->page_size == 0)
 368                 return;
 369
 370         if (priv->tree_view) {
 371                 if (! GTK_WIDGET_REALIZED (priv->tree_view))
 372                         return;
 373
 374 #if GTK_CHECK_VERSION (2, 11, 3)
 375                 gtk_tree_view_convert_tree_to_bin_window_coords (GTK_TREE_VIEW (priv->tree_view),
 376                                                                  0, (int) priv->vadjustment->value,
 377                                                                  NULL, &wy1);
 378                 gtk_tree_view_convert_tree_to_bin_window_coords (GTK_TREE_VIEW (priv->tree_view),
 379                                                                  0, (int) (priv->vadjustment->value + priv->vadjustment->page_size),
 380                                                                  NULL, &wy2);
 381 #else
 382                 gtk_tree_view_tree_to_widget_coords (GTK_TREE_VIEW (priv->tree_view),
 383                                                      0, (int) priv->vadjustment->value,
 384                                                      NULL, &wy1);
 385                 gtk_tree_view_tree_to_widget_coords (GTK_TREE_VIEW (priv->tree_view),
 386                                                      0, (int) (priv->vadjustment->value + priv->vadjustment->page_size),
 387                                                      NULL, &wy2);
 388 #endif /* GTK_CHECK_VERSION (2, 11, 3) */
 389
 390                 gtk_tree_view_get_path_at_pos (GTK_TREE_VIEW (priv->tree_view),
 391                                                1, wy1 + 1, &path,
 392                                                NULL, NULL, NULL);
 393                 gtk_tree_view_get_path_at_pos (GTK_TREE_VIEW (priv->tree_view),
 394                                                1, wy2 -1, &path2,
 395                                                NULL, NULL, NULL);
 396         } else if (priv->icon_view) {
 397                 if (! GTK_WIDGET_REALIZED (priv->icon_view))
 398                         return;
 399                 if (! gtk_icon_view_get_visible_range (GTK_ICON_VIEW (priv->icon_view), &path, &path2))
 400                         return;
 401         } else {
 402                 return;
 403         }
 404
 405         if (path && path2) {
 406                 update_visible_range (sidebar_thumbnails,
 407                                       gtk_tree_path_get_indices (path)[0],
 408                                       gtk_tree_path_get_indices (path2)[0]);
 409         }
 410
 411         gtk_tree_path_free (path);
 412         gtk_tree_path_free (path2);
 413 }
 414
 415 static void
 416 ev_sidebar_thumbnails_fill_model (EvSidebarThumbnails *sidebar_thumbnails)
 417 {
 418         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 419         GtkTreeIter iter;
 420         int i;
 421         gint prev_width = -1;
 422         gint prev_height = -1;
 423
 424         for (i = 0; i < sidebar_thumbnails->priv->n_pages; i++) {
 425                 gchar     *page_label;
 426                 gchar     *page_string;
 427                 GdkPixbuf *loading_icon = NULL;
 428                 gint       width, height;
 429
 430                 page_label = ev_page_cache_get_page_label (priv->page_cache, i);
 431                 page_string = g_markup_printf_escaped ("<i>%s</i>", page_label);
 432                 ev_page_cache_get_thumbnail_size (sidebar_thumbnails->priv->page_cache, i,
 433                                                   sidebar_thumbnails->priv->rotation,
 434                                                   &width, &height);
 435                 if (!loading_icon || (width != prev_width && height != prev_height)) {
 436                         loading_icon =
 437                                 ev_sidebar_thumbnails_get_loading_icon (sidebar_thumbnails,
 438                                                                         width, height);
 439                 }
 440
 441                 prev_width = width;
 442                 prev_height = height;
 443
 444                 gtk_list_store_append (priv->list_store, &iter);
 445                 gtk_list_store_set (priv->list_store, &iter,
 446                                     COLUMN_PAGE_STRING, page_string,
 447                                     COLUMN_PIXBUF, loading_icon,
 448                                     COLUMN_THUMBNAIL_SET, FALSE,
 449                                     -1);
 450                 g_free (page_label);
 451                 g_free (page_string);
 452         }
 453 }
 454
 455 static gboolean
 456 refresh (EvSidebarThumbnails *sidebar_thumbnails)
 457 {
 458         adjustment_changed_cb (sidebar_thumbnails);
 459         return FALSE;
 460 }
 461
 462 void
 463 ev_sidebar_thumbnails_refresh (EvSidebarThumbnails *sidebar_thumbnails,
 464                                int                  rotation)
 465 {
 466         sidebar_thumbnails->priv->rotation = rotation;
 467         if (sidebar_thumbnails->priv->loading_icons)
 468                 g_hash_table_remove_all (sidebar_thumbnails->priv->loading_icons);
 469
 470         if (sidebar_thumbnails->priv->document == NULL ||
 471             sidebar_thumbnails->priv->n_pages <= 0)
 472                 return;
 473
 474         ev_sidebar_thumbnails_clear_model (sidebar_thumbnails);
 475         ev_sidebar_thumbnails_fill_model (sidebar_thumbnails);
 476
 477         /* Trigger a redraw */
 478         sidebar_thumbnails->priv->start_page = -1;
 479         sidebar_thumbnails->priv->end_page = -1;
 480         g_idle_add ((GSourceFunc)refresh, sidebar_thumbnails);
 481 }
 482
 483 static void
 484 ev_sidebar_tree_selection_changed (GtkTreeSelection *selection,
 485                                    EvSidebarThumbnails *ev_sidebar_thumbnails)
 486 {
 487         EvSidebarThumbnailsPrivate *priv = ev_sidebar_thumbnails->priv;
 488         GtkTreePath *path;
 489         GtkTreeIter iter;
 490         int page;
 491
 492         if (!gtk_tree_selection_get_selected (selection, NULL, &iter))
 493                 return;
 494
 495         path = gtk_tree_model_get_path (GTK_TREE_MODEL (priv->list_store),
 496                                         &iter);
 497         page = gtk_tree_path_get_indices (path)[0];
 498         gtk_tree_path_free (path);
 499
 500         ev_page_cache_set_current_page_history (priv->page_cache, page);
 501 }
 502
 503 static void
 504 ev_sidebar_icon_selection_changed (GtkIconView         *icon_view,
 505                                    EvSidebarThumbnails *ev_sidebar_thumbnails)
 506 {
 507         EvSidebarThumbnailsPrivate *priv = ev_sidebar_thumbnails->priv;
 508         GtkTreePath *path;
 509         GList *selected;
 510         int page;
 511
 512         selected = gtk_icon_view_get_selected_items (icon_view);
 513         if (selected == NULL)
 514                 return;
 515
 516         /* We don't handle or expect multiple selection. */
 517         g_assert (selected->next == NULL);
 518
 519         path = selected->data;
 520         page = gtk_tree_path_get_indices (path)[0];
 521
 522         gtk_tree_path_free (path);
 523         g_list_free (selected);
 524
 525         ev_page_cache_set_current_page_history (priv->page_cache, page);
 526 }
 527
 528 static void
 529 ev_sidebar_init_tree_view (EvSidebarThumbnails *ev_sidebar_thumbnails)
 530 {
 531         EvSidebarThumbnailsPrivate *priv;
 532         GtkTreeSelection *selection;
 533         GtkCellRenderer *renderer;
 534
 535         priv = ev_sidebar_thumbnails->priv;
 536         priv->tree_view = gtk_tree_view_new_with_model (GTK_TREE_MODEL (priv->list_store));
 537
 538         selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (priv->tree_view));
 539         g_signal_connect (selection, "changed",
 540                           G_CALLBACK (ev_sidebar_tree_selection_changed), ev_sidebar_thumbnails);
 541         gtk_tree_view_set_headers_visible (GTK_TREE_VIEW (priv->tree_view), FALSE);
 542         renderer = g_object_new (GTK_TYPE_CELL_RENDERER_PIXBUF,
 543                                  "xpad", 2,
 544                                  "ypad", 2,
 545                                  NULL);
 546         gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (priv->tree_view), -1,
 547                                                      NULL, renderer,
 548                                                      "pixbuf", 1,
 549                                                      NULL);
 550         gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (priv->tree_view), -1,
 551                                                      NULL, gtk_cell_renderer_text_new (),
 552                                                      "markup", 0, NULL);
 553         gtk_container_add (GTK_CONTAINER (priv->swindow), priv->tree_view);
 554         gtk_widget_show (priv->tree_view);
 555 }
 556
 557 static void
 558 ev_sidebar_init_icon_view (EvSidebarThumbnails *ev_sidebar_thumbnails)
 559 {
 560         EvSidebarThumbnailsPrivate *priv;
 561
 562         priv = ev_sidebar_thumbnails->priv;
 563
 564         priv->icon_view = gtk_icon_view_new_with_model (GTK_TREE_MODEL (priv->list_store));
 565         gtk_icon_view_set_markup_column (GTK_ICON_VIEW (priv->icon_view), 0);
 566         gtk_icon_view_set_pixbuf_column (GTK_ICON_VIEW (priv->icon_view), 1);
 567         g_signal_connect (priv->icon_view, "selection-changed",
 568                           G_CALLBACK (ev_sidebar_icon_selection_changed), ev_sidebar_thumbnails);
 569
 570         gtk_container_add (GTK_CONTAINER (priv->swindow), priv->icon_view);
 571         gtk_widget_show (priv->icon_view);
 572 }
 573
 574 static gboolean
 575 ev_sidebar_thumbnails_use_icon_view (EvSidebarThumbnails *sidebar_thumbnails)
 576 {
 577         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 578         if (ev_page_cache_get_n_pages (priv->page_cache) > MAX_ICON_VIEW_PAGE_COUNT)
 579                 return FALSE;
 580         return TRUE;
 581 }
 582
 583 static void
 584 ev_sidebar_thumbnails_init (EvSidebarThumbnails *ev_sidebar_thumbnails)
 585 {
 586         EvSidebarThumbnailsPrivate *priv;
 587
 588         priv = ev_sidebar_thumbnails->priv = EV_SIDEBAR_THUMBNAILS_GET_PRIVATE (ev_sidebar_thumbnails);
 589
 590         priv->list_store = gtk_list_store_new (NUM_COLUMNS,
 591                                                G_TYPE_STRING,
 592                                                GDK_TYPE_PIXBUF,
 593                                                G_TYPE_BOOLEAN,
 594                                                EV_TYPE_JOB_THUMBNAIL);
 595
 596         priv->swindow = gtk_scrolled_window_new (NULL, NULL);
 597
 598         /* We actually don't want GTK_POLICY_AUTOMATIC for horizontal scrollbar here
 599          * it's just a workaround for bug #449462
 600          */
 601         gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (priv->swindow),
 602                                         GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);
 603         gtk_scrolled_window_set_shadow_type (GTK_SCROLLED_WINDOW (priv->swindow),
 604                                              GTK_SHADOW_IN);
 605         priv->vadjustment = gtk_scrolled_window_get_vadjustment (GTK_SCROLLED_WINDOW (priv->swindow));
 606         g_signal_connect_data (G_OBJECT (priv->vadjustment), "value-changed",
 607                                G_CALLBACK (adjustment_changed_cb),
 608                                ev_sidebar_thumbnails, NULL,
 609                                G_CONNECT_SWAPPED | G_CONNECT_AFTER);
 610         g_signal_connect_swapped (G_OBJECT (priv->swindow), "size-allocate",
 611                                   G_CALLBACK (adjustment_changed_cb),
 612                                   ev_sidebar_thumbnails);
 613         gtk_box_pack_start (GTK_BOX (ev_sidebar_thumbnails), priv->swindow, TRUE, TRUE, 0);
 614
 615         /* Put it all together */
 616         gtk_widget_show_all (priv->swindow);
 617 }
 618
 619 static void
 620 page_changed_cb (EvPageCache         *page_cache,
 621                  int                  page,
 622                  EvSidebarThumbnails *sidebar)
 623 {
 624         GtkTreeView *tree_view;
 625         GtkTreePath *path;
 626
 627         path = gtk_tree_path_new_from_indices (page, -1);
 628
 629         if (sidebar->priv->tree_view) {
 630                 tree_view = GTK_TREE_VIEW (sidebar->priv->tree_view);
 631                 gtk_tree_view_set_cursor (tree_view, path, NULL, FALSE);
 632                 gtk_tree_view_scroll_to_cell (tree_view, path, NULL, FALSE, 0.0, 0.0);
 633         } else if (sidebar->priv->icon_view) {
 634
 635                 g_signal_handlers_block_by_func
 636                         (sidebar->priv->icon_view,
 637                          G_CALLBACK (ev_sidebar_icon_selection_changed), sidebar);
 638
 639                 gtk_icon_view_select_path (GTK_ICON_VIEW (sidebar->priv->icon_view), path);
 640
 641                 g_signal_handlers_unblock_by_func
 642                         (sidebar->priv->icon_view,
 643                          G_CALLBACK (ev_sidebar_icon_selection_changed), sidebar);
 644
 645                 gtk_icon_view_set_cursor (GTK_ICON_VIEW (sidebar->priv->icon_view), path, NULL, FALSE);
 646         }
 647
 648         gtk_tree_path_free (path);
 649 }
 650
 651 static void
 652 thumbnail_job_completed_callback (EvJobThumbnail      *job,
 653                                   EvSidebarThumbnails *sidebar_thumbnails)
 654 {
 655         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 656         GtkTreeIter *iter;
 657
 658         iter = (GtkTreeIter *) g_object_get_data (G_OBJECT (job), "tree_iter");
 659         gtk_list_store_set (priv->list_store,
 660                             iter,
 661                             COLUMN_PIXBUF, job->thumbnail,
 662                             COLUMN_THUMBNAIL_SET, TRUE,
 663                             COLUMN_JOB, NULL,
 664                             -1);
 665 }
 666
 667 static void
 668 ev_sidebar_thumbnails_set_document (EvSidebarPage       *sidebar_page,
 669                                     EvDocument          *document)
 670 {
 671         EvSidebarThumbnails *sidebar_thumbnails = EV_SIDEBAR_THUMBNAILS (sidebar_page);
 672
 673         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 674
 675         g_return_if_fail (EV_IS_DOCUMENT_THUMBNAILS (document));
 676
 677         priv->page_cache = ev_page_cache_get (document);
 678         priv->document = document;
 679         priv->n_pages = ev_page_cache_get_n_pages (priv->page_cache);
 680         priv->loading_icons = g_hash_table_new_full (g_str_hash,
 681                                                      g_str_equal,
 682                                                      (GDestroyNotify)g_free,
 683                                                      (GDestroyNotify)g_object_unref);
 684
 685         ev_sidebar_thumbnails_clear_model (sidebar_thumbnails);
 686         ev_sidebar_thumbnails_fill_model (sidebar_thumbnails);
 687
 688         /* Create the view widget, and remove the old one, if needed */
 689         if (ev_sidebar_thumbnails_use_icon_view (sidebar_thumbnails)) {
 690                 if (priv->tree_view) {
 691                         gtk_container_remove (GTK_CONTAINER (priv->swindow), priv->tree_view);
 692                         priv->tree_view = NULL;
 693                 }
 694
 695                 if (! priv->icon_view) {
 696                         ev_sidebar_init_icon_view (sidebar_thumbnails);
 697                         g_object_notify (G_OBJECT (sidebar_thumbnails), "main_widget");
 698                 } else {
 699                         gtk_widget_queue_resize (priv->icon_view);
 700                 }
 701         } else {
 702                 if (priv->icon_view) {
 703                         gtk_container_remove (GTK_CONTAINER (priv->swindow), priv->icon_view);
 704                         priv->icon_view = NULL;
 705                 }
 706
 707                 if (! priv->tree_view) {
 708                         ev_sidebar_init_tree_view (sidebar_thumbnails);
 709                         g_object_notify (G_OBJECT (sidebar_thumbnails), "main_widget");
 710                 }
 711         }
 712
 713         /* Connect to the signal and trigger a fake callback */
 714         g_signal_connect (priv->page_cache, "page-changed", G_CALLBACK (page_changed_cb), sidebar_thumbnails);
 715         sidebar_thumbnails->priv->start_page = -1;
 716         sidebar_thumbnails->priv->end_page = -1;
 717         page_changed_cb (priv->page_cache,
 718                          ev_page_cache_get_current_page (priv->page_cache),
 719                          sidebar_thumbnails);
 720         adjustment_changed_cb (sidebar_thumbnails);
 721 }
 722
 723 static gboolean
 724 ev_sidebar_thumbnails_clear_job (GtkTreeModel *model,
 725                                  GtkTreePath *path,
 726                                  GtkTreeIter *iter,
 727                                  gpointer data)
 728 {
 729         EvJob *job;
 730
 731         gtk_tree_model_get (model, iter, COLUMN_JOB, &job, -1);
 732
 733         if (job != NULL) {
 734                 ev_job_cancel (job);
 735                 g_signal_handlers_disconnect_by_func (job, thumbnail_job_completed_callback, data);
 736                 g_object_unref (job);
 737         }
 738
 739         return FALSE;
 740 }
 741
 742 static void
 743 ev_sidebar_thumbnails_clear_model (EvSidebarThumbnails *sidebar_thumbnails)
 744 {
 745         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 746
 747         gtk_tree_model_foreach (GTK_TREE_MODEL (priv->list_store), ev_sidebar_thumbnails_clear_job, sidebar_thumbnails);
 748         gtk_list_store_clear (priv->list_store);
 749 }
 750
 751 static gboolean
 752 ev_sidebar_thumbnails_support_document (EvSidebarPage   *sidebar_page,
 753                                         EvDocument *document)
 754 {
 755         return (EV_IS_DOCUMENT_THUMBNAILS (document));
 756 }
 757
 758 static const gchar*
 759 ev_sidebar_thumbnails_get_label (EvSidebarPage *sidebar_page)
 760 {
 761         return _("Thumbnails");
 762 }
 763
 764 static void
 765 ev_sidebar_thumbnails_page_iface_init (EvSidebarPageIface *iface)
 766 {
 767         iface->support_document = ev_sidebar_thumbnails_support_document;
 768         iface->set_document = ev_sidebar_thumbnails_set_document;
 769         iface->get_label = ev_sidebar_thumbnails_get_label;
 770 }
 771