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         gdouble width;
 267
 268         ev_document_get_page_size (priv->document, page, &width, NULL);
 269
 270         return (gdouble)THUMBNAIL_WIDTH / width;
 271 }
 272
 273 static void
 274 add_range (EvSidebarThumbnails *sidebar_thumbnails,
 275            gint                 start_page,
 276            gint                 end_page)
 277 {
 278         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 279         GtkTreePath *path;
 280         GtkTreeIter iter;
 281         gboolean result;
 282         gint page = start_page;
 283
 284         g_assert (start_page <= end_page);
 285
 286         path = gtk_tree_path_new_from_indices (start_page, -1);
 287         for (result = gtk_tree_model_get_iter (GTK_TREE_MODEL (priv->list_store), &iter, path);
 288              result && page <= end_page;
 289              result = gtk_tree_model_iter_next (GTK_TREE_MODEL (priv->list_store), &iter), page ++) {
 290                 EvJob *job;
 291                 gboolean thumbnail_set;
 292
 293                 gtk_tree_model_get (GTK_TREE_MODEL (priv->list_store), &iter,
 294                                     COLUMN_JOB, &job,
 295                                     COLUMN_THUMBNAIL_SET, &thumbnail_set,
 296                                     -1);
 297
 298                 if (job == NULL && !thumbnail_set) {
 299                         job = ev_job_thumbnail_new (priv->document,
 300                                                     page, priv->rotation,
 301                                                     get_scale_for_page (sidebar_thumbnails, page));
 302                         ev_job_scheduler_push_job (EV_JOB (job), EV_JOB_PRIORITY_HIGH);
 303
 304                         g_object_set_data_full (G_OBJECT (job), "tree_iter",
 305                                                 gtk_tree_iter_copy (&iter),
 306                                                 (GDestroyNotify) gtk_tree_iter_free);
 307                         g_signal_connect (job, "finished",
 308                                           G_CALLBACK (thumbnail_job_completed_callback),
 309                                           sidebar_thumbnails);
 310                         gtk_list_store_set (priv->list_store, &iter,
 311                                             COLUMN_JOB, job,
 312                                             -1);
 313
 314                         /* The queue and the list own a ref to the job now */
 315                         g_object_unref (job);
 316                 } else if (job) {
 317                         g_object_unref (job);
 318                 }
 319         }
 320         gtk_tree_path_free (path);
 321 }
 322
 323 /* This modifies start */
 324 static void
 325 update_visible_range (EvSidebarThumbnails *sidebar_thumbnails,
 326                       gint                 start_page,
 327                       gint                 end_page)
 328 {
 329         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 330         int old_start_page, old_end_page;
 331
 332         old_start_page = priv->start_page;
 333         old_end_page = priv->end_page;
 334
 335         if (start_page == old_start_page &&
 336             end_page == old_end_page)
 337                 return;
 338
 339         /* Clear the areas we no longer display */
 340         if (old_start_page >= 0 && old_start_page < start_page)
 341                 clear_range (sidebar_thumbnails, old_start_page, MIN (start_page - 1, old_end_page));
 342
 343         if (old_end_page > 0 && old_end_page > end_page)
 344                 clear_range (sidebar_thumbnails, MAX (end_page + 1, old_start_page), old_end_page);
 345
 346         add_range (sidebar_thumbnails, start_page, end_page);
 347
 348         priv->start_page = start_page;
 349         priv->end_page = end_page;
 350 }
 351
 352 static void
 353 adjustment_changed_cb (EvSidebarThumbnails *sidebar_thumbnails)
 354 {
 355         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 356         GtkTreePath *path = NULL;
 357         GtkTreePath *path2 = NULL;
 358         gint wy1;
 359         gint wy2;
 360
 361         /* Widget is not currently visible */
 362         if (!GTK_WIDGET_MAPPED (sidebar_thumbnails))
 363                 return;
 364
 365         if (priv->vadjustment->page_size == 0)
 366                 return;
 367
 368         if (priv->tree_view) {
 369                 if (! GTK_WIDGET_REALIZED (priv->tree_view))
 370                         return;
 371
 372                 gtk_tree_view_convert_tree_to_bin_window_coords (GTK_TREE_VIEW (priv->tree_view),
 373                                                                  0, (int) priv->vadjustment->value,
 374                                                                  NULL, &wy1);
 375                 gtk_tree_view_convert_tree_to_bin_window_coords (GTK_TREE_VIEW (priv->tree_view),
 376                                                                  0, (int) (priv->vadjustment->value + priv->vadjustment->page_size),
 377                                                                  NULL, &wy2);
 378                 gtk_tree_view_get_path_at_pos (GTK_TREE_VIEW (priv->tree_view),
 379                                                1, wy1 + 1, &path,
 380                                                NULL, NULL, NULL);
 381                 gtk_tree_view_get_path_at_pos (GTK_TREE_VIEW (priv->tree_view),
 382                                                1, wy2 -1, &path2,
 383                                                NULL, NULL, NULL);
 384         } else if (priv->icon_view) {
 385                 if (! GTK_WIDGET_REALIZED (priv->icon_view))
 386                         return;
 387                 if (! gtk_icon_view_get_visible_range (GTK_ICON_VIEW (priv->icon_view), &path, &path2))
 388                         return;
 389         } else {
 390                 return;
 391         }
 392
 393         if (path && path2) {
 394                 update_visible_range (sidebar_thumbnails,
 395                                       gtk_tree_path_get_indices (path)[0],
 396                                       gtk_tree_path_get_indices (path2)[0]);
 397         }
 398
 399         gtk_tree_path_free (path);
 400         gtk_tree_path_free (path2);
 401 }
 402
 403 static void
 404 ev_sidebar_thumbnails_fill_model (EvSidebarThumbnails *sidebar_thumbnails)
 405 {
 406         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 407         GtkTreeIter iter;
 408         int i;
 409         gint prev_width = -1;
 410         gint prev_height = -1;
 411
 412         for (i = 0; i < sidebar_thumbnails->priv->n_pages; i++) {
 413                 gchar     *page_label;
 414                 gchar     *page_string;
 415                 GdkPixbuf *loading_icon = NULL;
 416                 gint       width, height;
 417
 418                 page_label = ev_document_get_page_label (priv->document, i);
 419                 page_string = g_markup_printf_escaped ("<i>%s</i>", page_label);
 420                 ev_page_cache_get_thumbnail_size (sidebar_thumbnails->priv->page_cache, i,
 421                                                   sidebar_thumbnails->priv->rotation,
 422                                                   &width, &height);
 423                 if (!loading_icon || (width != prev_width && height != prev_height)) {
 424                         loading_icon =
 425                                 ev_sidebar_thumbnails_get_loading_icon (sidebar_thumbnails,
 426                                                                         width, height);
 427                 }
 428
 429                 prev_width = width;
 430                 prev_height = height;
 431
 432                 gtk_list_store_append (priv->list_store, &iter);
 433                 gtk_list_store_set (priv->list_store, &iter,
 434                                     COLUMN_PAGE_STRING, page_string,
 435                                     COLUMN_PIXBUF, loading_icon,
 436                                     COLUMN_THUMBNAIL_SET, FALSE,
 437                                     -1);
 438                 g_free (page_label);
 439                 g_free (page_string);
 440         }
 441 }
 442
 443 static gboolean
 444 refresh (EvSidebarThumbnails *sidebar_thumbnails)
 445 {
 446         adjustment_changed_cb (sidebar_thumbnails);
 447         return FALSE;
 448 }
 449
 450 void
 451 ev_sidebar_thumbnails_refresh (EvSidebarThumbnails *sidebar_thumbnails,
 452                                int                  rotation)
 453 {
 454         sidebar_thumbnails->priv->rotation = rotation;
 455         if (sidebar_thumbnails->priv->loading_icons)
 456                 g_hash_table_remove_all (sidebar_thumbnails->priv->loading_icons);
 457
 458         if (sidebar_thumbnails->priv->document == NULL ||
 459             sidebar_thumbnails->priv->n_pages <= 0)
 460                 return;
 461
 462         ev_sidebar_thumbnails_clear_model (sidebar_thumbnails);
 463         ev_sidebar_thumbnails_fill_model (sidebar_thumbnails);
 464
 465         /* Trigger a redraw */
 466         sidebar_thumbnails->priv->start_page = -1;
 467         sidebar_thumbnails->priv->end_page = -1;
 468         g_idle_add ((GSourceFunc)refresh, sidebar_thumbnails);
 469 }
 470
 471 static void
 472 ev_sidebar_tree_selection_changed (GtkTreeSelection *selection,
 473                                    EvSidebarThumbnails *ev_sidebar_thumbnails)
 474 {
 475         EvSidebarThumbnailsPrivate *priv = ev_sidebar_thumbnails->priv;
 476         GtkTreePath *path;
 477         GtkTreeIter iter;
 478         int page;
 479
 480         if (!gtk_tree_selection_get_selected (selection, NULL, &iter))
 481                 return;
 482
 483         path = gtk_tree_model_get_path (GTK_TREE_MODEL (priv->list_store),
 484                                         &iter);
 485         page = gtk_tree_path_get_indices (path)[0];
 486         gtk_tree_path_free (path);
 487
 488         ev_page_cache_set_current_page_history (priv->page_cache, page);
 489 }
 490
 491 static void
 492 ev_sidebar_icon_selection_changed (GtkIconView         *icon_view,
 493                                    EvSidebarThumbnails *ev_sidebar_thumbnails)
 494 {
 495         EvSidebarThumbnailsPrivate *priv = ev_sidebar_thumbnails->priv;
 496         GtkTreePath *path;
 497         GList *selected;
 498         int page;
 499
 500         selected = gtk_icon_view_get_selected_items (icon_view);
 501         if (selected == NULL)
 502                 return;
 503
 504         /* We don't handle or expect multiple selection. */
 505         g_assert (selected->next == NULL);
 506
 507         path = selected->data;
 508         page = gtk_tree_path_get_indices (path)[0];
 509
 510         gtk_tree_path_free (path);
 511         g_list_free (selected);
 512
 513         ev_page_cache_set_current_page_history (priv->page_cache, page);
 514 }
 515
 516 static void
 517 ev_sidebar_init_tree_view (EvSidebarThumbnails *ev_sidebar_thumbnails)
 518 {
 519         EvSidebarThumbnailsPrivate *priv;
 520         GtkTreeSelection *selection;
 521         GtkCellRenderer *renderer;
 522
 523         priv = ev_sidebar_thumbnails->priv;
 524         priv->tree_view = gtk_tree_view_new_with_model (GTK_TREE_MODEL (priv->list_store));
 525
 526         selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (priv->tree_view));
 527         g_signal_connect (selection, "changed",
 528                           G_CALLBACK (ev_sidebar_tree_selection_changed), ev_sidebar_thumbnails);
 529         gtk_tree_view_set_headers_visible (GTK_TREE_VIEW (priv->tree_view), FALSE);
 530         renderer = g_object_new (GTK_TYPE_CELL_RENDERER_PIXBUF,
 531                                  "xpad", 2,
 532                                  "ypad", 2,
 533                                  NULL);
 534         gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (priv->tree_view), -1,
 535                                                      NULL, renderer,
 536                                                      "pixbuf", 1,
 537                                                      NULL);
 538         gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (priv->tree_view), -1,
 539                                                      NULL, gtk_cell_renderer_text_new (),
 540                                                      "markup", 0, NULL);
 541         gtk_container_add (GTK_CONTAINER (priv->swindow), priv->tree_view);
 542         gtk_widget_show (priv->tree_view);
 543 }
 544
 545 static void
 546 ev_sidebar_init_icon_view (EvSidebarThumbnails *ev_sidebar_thumbnails)
 547 {
 548         EvSidebarThumbnailsPrivate *priv;
 549
 550         priv = ev_sidebar_thumbnails->priv;
 551
 552         priv->icon_view = gtk_icon_view_new_with_model (GTK_TREE_MODEL (priv->list_store));
 553         gtk_icon_view_set_markup_column (GTK_ICON_VIEW (priv->icon_view), 0);
 554         gtk_icon_view_set_pixbuf_column (GTK_ICON_VIEW (priv->icon_view), 1);
 555         g_signal_connect (priv->icon_view, "selection-changed",
 556                           G_CALLBACK (ev_sidebar_icon_selection_changed), ev_sidebar_thumbnails);
 557
 558         gtk_container_add (GTK_CONTAINER (priv->swindow), priv->icon_view);
 559         gtk_widget_show (priv->icon_view);
 560 }
 561
 562 static gboolean
 563 ev_sidebar_thumbnails_use_icon_view (EvSidebarThumbnails *sidebar_thumbnails)
 564 {
 565         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 566
 567         return (ev_document_get_n_pages (priv->document) <= MAX_ICON_VIEW_PAGE_COUNT);
 568 }
 569
 570 static void
 571 ev_sidebar_thumbnails_init (EvSidebarThumbnails *ev_sidebar_thumbnails)
 572 {
 573         EvSidebarThumbnailsPrivate *priv;
 574
 575         priv = ev_sidebar_thumbnails->priv = EV_SIDEBAR_THUMBNAILS_GET_PRIVATE (ev_sidebar_thumbnails);
 576
 577         priv->list_store = gtk_list_store_new (NUM_COLUMNS,
 578                                                G_TYPE_STRING,
 579                                                GDK_TYPE_PIXBUF,
 580                                                G_TYPE_BOOLEAN,
 581                                                EV_TYPE_JOB_THUMBNAIL);
 582
 583         priv->swindow = gtk_scrolled_window_new (NULL, NULL);
 584
 585         /* We actually don't want GTK_POLICY_AUTOMATIC for horizontal scrollbar here
 586          * it's just a workaround for bug #449462
 587          */
 588         gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (priv->swindow),
 589                                         GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);
 590         gtk_scrolled_window_set_shadow_type (GTK_SCROLLED_WINDOW (priv->swindow),
 591                                              GTK_SHADOW_IN);
 592         priv->vadjustment = gtk_scrolled_window_get_vadjustment (GTK_SCROLLED_WINDOW (priv->swindow));
 593         g_signal_connect_data (priv->vadjustment, "value-changed",
 594                                G_CALLBACK (adjustment_changed_cb),
 595                                ev_sidebar_thumbnails, NULL,
 596                                G_CONNECT_SWAPPED | G_CONNECT_AFTER);
 597         g_signal_connect_swapped (priv->swindow, "size-allocate",
 598                                   G_CALLBACK (adjustment_changed_cb),
 599                                   ev_sidebar_thumbnails);
 600         gtk_box_pack_start (GTK_BOX (ev_sidebar_thumbnails), priv->swindow, TRUE, TRUE, 0);
 601
 602         /* Put it all together */
 603         gtk_widget_show_all (priv->swindow);
 604 }
 605
 606 static void
 607 page_changed_cb (EvPageCache         *page_cache,
 608                  int                  page,
 609                  EvSidebarThumbnails *sidebar)
 610 {
 611         GtkTreeView *tree_view;
 612         GtkTreePath *path;
 613
 614         path = gtk_tree_path_new_from_indices (page, -1);
 615
 616         if (sidebar->priv->tree_view) {
 617                 tree_view = GTK_TREE_VIEW (sidebar->priv->tree_view);
 618                 gtk_tree_view_set_cursor (tree_view, path, NULL, FALSE);
 619                 gtk_tree_view_scroll_to_cell (tree_view, path, NULL, FALSE, 0.0, 0.0);
 620         } else if (sidebar->priv->icon_view) {
 621
 622                 g_signal_handlers_block_by_func
 623                         (sidebar->priv->icon_view,
 624                          G_CALLBACK (ev_sidebar_icon_selection_changed), sidebar);
 625
 626                 gtk_icon_view_select_path (GTK_ICON_VIEW (sidebar->priv->icon_view), path);
 627
 628                 g_signal_handlers_unblock_by_func
 629                         (sidebar->priv->icon_view,
 630                          G_CALLBACK (ev_sidebar_icon_selection_changed), sidebar);
 631
 632                 gtk_icon_view_set_cursor (GTK_ICON_VIEW (sidebar->priv->icon_view), path, NULL, FALSE);
 633         }
 634
 635         gtk_tree_path_free (path);
 636 }
 637
 638 static void
 639 thumbnail_job_completed_callback (EvJobThumbnail      *job,
 640                                   EvSidebarThumbnails *sidebar_thumbnails)
 641 {
 642         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 643         GtkTreeIter *iter;
 644
 645         iter = (GtkTreeIter *) g_object_get_data (G_OBJECT (job), "tree_iter");
 646         gtk_list_store_set (priv->list_store,
 647                             iter,
 648                             COLUMN_PIXBUF, job->thumbnail,
 649                             COLUMN_THUMBNAIL_SET, TRUE,
 650                             COLUMN_JOB, NULL,
 651                             -1);
 652 }
 653
 654 static void
 655 ev_sidebar_thumbnails_set_document (EvSidebarPage *sidebar_page,
 656                                     EvDocument    *document)
 657 {
 658         EvSidebarThumbnails *sidebar_thumbnails = EV_SIDEBAR_THUMBNAILS (sidebar_page);
 659
 660         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 661
 662         priv->page_cache = ev_page_cache_get (document);
 663
 664         if (!EV_IS_DOCUMENT_THUMBNAILS (document) ||
 665             ev_document_get_n_pages (document) <= 0 ||
 666             !ev_page_cache_check_dimensions (priv->page_cache)) {
 667                 return;
 668         }
 669
 670         priv->document = document;
 671         priv->n_pages = ev_document_get_n_pages (document);
 672         priv->loading_icons = g_hash_table_new_full (g_str_hash,
 673                                                      g_str_equal,
 674                                                      (GDestroyNotify)g_free,
 675                                                      (GDestroyNotify)g_object_unref);
 676
 677         ev_sidebar_thumbnails_clear_model (sidebar_thumbnails);
 678         ev_sidebar_thumbnails_fill_model (sidebar_thumbnails);
 679
 680         /* Create the view widget, and remove the old one, if needed */
 681         if (ev_sidebar_thumbnails_use_icon_view (sidebar_thumbnails)) {
 682                 if (priv->tree_view) {
 683                         gtk_container_remove (GTK_CONTAINER (priv->swindow), priv->tree_view);
 684                         priv->tree_view = NULL;
 685                 }
 686
 687                 if (! priv->icon_view) {
 688                         ev_sidebar_init_icon_view (sidebar_thumbnails);
 689                         g_object_notify (G_OBJECT (sidebar_thumbnails), "main_widget");
 690                 } else {
 691                         gtk_widget_queue_resize (priv->icon_view);
 692                 }
 693         } else {
 694                 if (priv->icon_view) {
 695                         gtk_container_remove (GTK_CONTAINER (priv->swindow), priv->icon_view);
 696                         priv->icon_view = NULL;
 697                 }
 698
 699                 if (! priv->tree_view) {
 700                         ev_sidebar_init_tree_view (sidebar_thumbnails);
 701                         g_object_notify (G_OBJECT (sidebar_thumbnails), "main_widget");
 702                 }
 703         }
 704
 705         /* Connect to the signal and trigger a fake callback */
 706         g_signal_connect (priv->page_cache, "page-changed", G_CALLBACK (page_changed_cb), sidebar_thumbnails);
 707         sidebar_thumbnails->priv->start_page = -1;
 708         sidebar_thumbnails->priv->end_page = -1;
 709         page_changed_cb (priv->page_cache,
 710                          ev_page_cache_get_current_page (priv->page_cache),
 711                          sidebar_thumbnails);
 712         adjustment_changed_cb (sidebar_thumbnails);
 713 }
 714
 715 static gboolean
 716 ev_sidebar_thumbnails_clear_job (GtkTreeModel *model,
 717                                  GtkTreePath *path,
 718                                  GtkTreeIter *iter,
 719                                  gpointer data)
 720 {
 721         EvJob *job;
 722
 723         gtk_tree_model_get (model, iter, COLUMN_JOB, &job, -1);
 724
 725         if (job != NULL) {
 726                 ev_job_cancel (job);
 727                 g_signal_handlers_disconnect_by_func (job, thumbnail_job_completed_callback, data);
 728                 g_object_unref (job);
 729         }
 730
 731         return FALSE;
 732 }
 733
 734 static void
 735 ev_sidebar_thumbnails_clear_model (EvSidebarThumbnails *sidebar_thumbnails)
 736 {
 737         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 738
 739         gtk_tree_model_foreach (GTK_TREE_MODEL (priv->list_store), ev_sidebar_thumbnails_clear_job, sidebar_thumbnails);
 740         gtk_list_store_clear (priv->list_store);
 741 }
 742
 743 static gboolean
 744 ev_sidebar_thumbnails_support_document (EvSidebarPage   *sidebar_page,
 745                                         EvDocument *document)
 746 {
 747         return (EV_IS_DOCUMENT_THUMBNAILS (document));
 748 }
 749
 750 static const gchar*
 751 ev_sidebar_thumbnails_get_label (EvSidebarPage *sidebar_page)
 752 {
 753         return _("Thumbnails");
 754 }
 755
 756 static void
 757 ev_sidebar_thumbnails_page_iface_init (EvSidebarPageIface *iface)
 758 {
 759         iface->support_document = ev_sidebar_thumbnails_support_document;
 760         iface->set_document = ev_sidebar_thumbnails_set_document;
 761         iface->get_label = ev_sidebar_thumbnails_get_label;
 762 }
 763