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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 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-job-scheduler.h"
  36 #include "ev-sidebar-page.h"
  37 #include "ev-sidebar-thumbnails.h"
  38 #include "ev-utils.h"
  39 #include "ev-window.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 typedef struct _EvThumbsSize
  48 {
  49         gint width;
  50         gint height;
  51 } EvThumbsSize;
  52
  53 typedef struct _EvThumbsSizeCache {
  54         gboolean uniform;
  55         gint uniform_width;
  56         gint uniform_height;
  57         EvThumbsSize *sizes;
  58 } EvThumbsSizeCache;
  59
  60 struct _EvSidebarThumbnailsPrivate {
  61         GtkWidget *swindow;
  62         GtkWidget *icon_view;
  63         GtkWidget *tree_view;
  64         GtkAdjustment *vadjustment;
  65         GtkListStore *list_store;
  66         GHashTable *loading_icons;
  67         EvDocument *document;
  68         EvDocumentModel *model;
  69         EvThumbsSizeCache *size_cache;
  70
  71         gint n_pages, pages_done;
  72
  73         int rotation;
  74         gboolean inverted_colors;
  75
  76         /* Visible pages */
  77         gint start_page, end_page;
  78 };
  79
  80 enum {
  81         COLUMN_PAGE_STRING,
  82         COLUMN_PIXBUF,
  83         COLUMN_THUMBNAIL_SET,
  84         COLUMN_JOB,
  85         NUM_COLUMNS
  86 };
  87
  88 enum {
  89         PROP_0,
  90         PROP_WIDGET,
  91 };
  92
  93 static void         ev_sidebar_thumbnails_clear_model      (EvSidebarThumbnails     *sidebar);
  94 static gboolean     ev_sidebar_thumbnails_support_document (EvSidebarPage           *sidebar_page,
  95                                                             EvDocument              *document);
  96 static void         ev_sidebar_thumbnails_page_iface_init  (EvSidebarPageInterface  *iface);
  97 static const gchar* ev_sidebar_thumbnails_get_label        (EvSidebarPage           *sidebar_page);
  98 static void         thumbnail_job_completed_callback       (EvJobThumbnail          *job,
  99                                                             EvSidebarThumbnails     *sidebar_thumbnails);
 100 static void         adjustment_changed_cb                  (EvSidebarThumbnails     *sidebar_thumbnails);
 101
 102 G_DEFINE_TYPE_EXTENDED (EvSidebarThumbnails,
 103                         ev_sidebar_thumbnails,
 104                         GTK_TYPE_VBOX,
 105                         0,
 106                         G_IMPLEMENT_INTERFACE (EV_TYPE_SIDEBAR_PAGE,
 107                                                ev_sidebar_thumbnails_page_iface_init))
 108
 109 #define EV_SIDEBAR_THUMBNAILS_GET_PRIVATE(object) \
 110         (G_TYPE_INSTANCE_GET_PRIVATE ((object), EV_TYPE_SIDEBAR_THUMBNAILS, EvSidebarThumbnailsPrivate));
 111
 112 /* Thumbnails dimensions cache */
 113 #define EV_THUMBNAILS_SIZE_CACHE_KEY "ev-thumbnails-size-cache"
 114
 115 static void
 116 get_thumbnail_size_for_page (EvDocument *document,
 117                              guint       page,
 118                              gint       *width,
 119                              gint       *height)
 120 {
 121         gdouble scale;
 122         gdouble w, h;
 123
 124         ev_document_get_page_size (document, page, &w, &h);
 125         scale = (gdouble)THUMBNAIL_WIDTH / w;
 126
 127         *width = MAX ((gint)(w * scale + 0.5), 1);
 128         *height = MAX ((gint)(h * scale + 0.5), 1);
 129 }
 130
 131 static EvThumbsSizeCache *
 132 ev_thumbnails_size_cache_new (EvDocument *document)
 133 {
 134         EvThumbsSizeCache *cache;
 135         gint               i, n_pages;
 136         EvThumbsSize      *thumb_size;
 137
 138         cache = g_new0 (EvThumbsSizeCache, 1);
 139
 140         if (ev_document_is_page_size_uniform (document)) {
 141                 cache->uniform = TRUE;
 142                 get_thumbnail_size_for_page (document, 0,
 143                                              &cache->uniform_width,
 144                                              &cache->uniform_height);
 145                 return cache;
 146         }
 147
 148         n_pages = ev_document_get_n_pages (document);
 149         cache->sizes = g_new0 (EvThumbsSize, n_pages);
 150
 151         for (i = 0; i < n_pages; i++) {
 152                 thumb_size = &(cache->sizes[i]);
 153                 get_thumbnail_size_for_page (document, i,
 154                                              &thumb_size->width,
 155                                              &thumb_size->height);
 156         }
 157
 158         return cache;
 159 }
 160
 161 static void
 162 ev_thumbnails_size_cache_get_size (EvThumbsSizeCache *cache,
 163                                    gint               page,
 164                                    gint               rotation,
 165                                    gint              *width,
 166                                    gint              *height)
 167 {
 168         gint w, h;
 169
 170         if (cache->uniform) {
 171                 w = cache->uniform_width;
 172                 h = cache->uniform_height;
 173         } else {
 174                 EvThumbsSize *thumb_size;
 175
 176                 thumb_size = &(cache->sizes[page]);
 177
 178                 w = thumb_size->width;
 179                 h = thumb_size->height;
 180         }
 181
 182         if (rotation == 0 || rotation == 180) {
 183                 if (width) *width = w;
 184                 if (height) *height = h;
 185         } else {
 186                 if (width) *width = h;
 187                 if (height) *height = w;
 188         }
 189 }
 190
 191 static void
 192 ev_thumbnails_size_cache_free (EvThumbsSizeCache *cache)
 193 {
 194         if (cache->sizes) {
 195                 g_free (cache->sizes);
 196                 cache->sizes = NULL;
 197         }
 198
 199         g_free (cache);
 200 }
 201
 202 static EvThumbsSizeCache *
 203 ev_thumbnails_size_cache_get (EvDocument *document)
 204 {
 205         EvThumbsSizeCache *cache;
 206
 207         cache = g_object_get_data (G_OBJECT (document), EV_THUMBNAILS_SIZE_CACHE_KEY);
 208         if (!cache) {
 209                 cache = ev_thumbnails_size_cache_new (document);
 210                 g_object_set_data_full (G_OBJECT (document),
 211                                         EV_THUMBNAILS_SIZE_CACHE_KEY,
 212                                         cache,
 213                                         (GDestroyNotify)ev_thumbnails_size_cache_free);
 214         }
 215
 216         return cache;
 217 }
 218
 219
 220 static void
 221 ev_sidebar_thumbnails_dispose (GObject *object)
 222 {
 223         EvSidebarThumbnails *sidebar_thumbnails = EV_SIDEBAR_THUMBNAILS (object);
 224
 225         if (sidebar_thumbnails->priv->loading_icons) {
 226                 g_hash_table_destroy (sidebar_thumbnails->priv->loading_icons);
 227                 sidebar_thumbnails->priv->loading_icons = NULL;
 228         }
 229
 230         if (sidebar_thumbnails->priv->list_store) {
 231                 ev_sidebar_thumbnails_clear_model (sidebar_thumbnails);
 232                 g_object_unref (sidebar_thumbnails->priv->list_store);
 233                 sidebar_thumbnails->priv->list_store = NULL;
 234         }
 235
 236         G_OBJECT_CLASS (ev_sidebar_thumbnails_parent_class)->dispose (object);
 237 }
 238
 239 static void
 240 ev_sidebar_thumbnails_get_property (GObject    *object,
 241                                     guint       prop_id,
 242                                     GValue     *value,
 243                                     GParamSpec *pspec)
 244 {
 245         EvSidebarThumbnails *sidebar = EV_SIDEBAR_THUMBNAILS (object);
 246
 247         switch (prop_id) {
 248         case PROP_WIDGET:
 249                 if (sidebar->priv->tree_view)
 250                         g_value_set_object (value, sidebar->priv->tree_view);
 251                 else
 252                         g_value_set_object (value, sidebar->priv->icon_view);
 253                 break;
 254         default:
 255                 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 256                 break;
 257         }
 258 }
 259
 260 static void
 261 ev_sidebar_thumbnails_map (GtkWidget *widget)
 262 {
 263         EvSidebarThumbnails *sidebar;
 264
 265         sidebar = EV_SIDEBAR_THUMBNAILS (widget);
 266
 267         GTK_WIDGET_CLASS (ev_sidebar_thumbnails_parent_class)->map (widget);
 268
 269         adjustment_changed_cb (sidebar);
 270 }
 271
 272 static void
 273 ev_sidebar_thumbnails_class_init (EvSidebarThumbnailsClass *ev_sidebar_thumbnails_class)
 274 {
 275         GObjectClass *g_object_class;
 276         GtkWidgetClass *widget_class;
 277
 278         g_object_class = G_OBJECT_CLASS (ev_sidebar_thumbnails_class);
 279         widget_class = GTK_WIDGET_CLASS (ev_sidebar_thumbnails_class);
 280
 281         g_object_class->dispose = ev_sidebar_thumbnails_dispose;
 282         g_object_class->get_property = ev_sidebar_thumbnails_get_property;
 283         widget_class->map = ev_sidebar_thumbnails_map;
 284
 285         g_object_class_override_property (g_object_class,
 286                                           PROP_WIDGET,
 287                                           "main-widget");
 288
 289         g_type_class_add_private (g_object_class, sizeof (EvSidebarThumbnailsPrivate));
 290 }
 291
 292 GtkWidget *
 293 ev_sidebar_thumbnails_new (void)
 294 {
 295         GtkWidget *ev_sidebar_thumbnails;
 296
 297         ev_sidebar_thumbnails = g_object_new (EV_TYPE_SIDEBAR_THUMBNAILS, NULL);
 298
 299         return ev_sidebar_thumbnails;
 300 }
 301
 302 static GdkPixbuf *
 303 ev_sidebar_thumbnails_get_loading_icon (EvSidebarThumbnails *sidebar_thumbnails,
 304                                         gint                 width,
 305                                         gint                 height)
 306 {
 307         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 308         GdkPixbuf *icon;
 309         gchar     *key;
 310
 311         key = g_strdup_printf ("%dx%d", width, height);
 312         icon = g_hash_table_lookup (priv->loading_icons, key);
 313         if (!icon) {
 314                 gboolean inverted_colors;
 315
 316                 inverted_colors = ev_document_model_get_inverted_colors (priv->model);
 317                 icon = ev_document_misc_get_loading_thumbnail (width, height, inverted_colors);
 318                 g_hash_table_insert (priv->loading_icons, key, icon);
 319         } else {
 320                 g_free (key);
 321         }
 322
 323         return icon;
 324 }
 325
 326 static void
 327 clear_range (EvSidebarThumbnails *sidebar_thumbnails,
 328              gint                 start_page,
 329              gint                 end_page)
 330 {
 331         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 332         GtkTreePath *path;
 333         GtkTreeIter iter;
 334         gboolean result;
 335         gint prev_width = -1;
 336         gint prev_height = -1;
 337
 338         g_assert (start_page <= end_page);
 339
 340         path = gtk_tree_path_new_from_indices (start_page, -1);
 341         for (result = gtk_tree_model_get_iter (GTK_TREE_MODEL (priv->list_store), &iter, path);
 342              result && start_page <= end_page;
 343              result = gtk_tree_model_iter_next (GTK_TREE_MODEL (priv->list_store), &iter), start_page ++) {
 344                 EvJobThumbnail *job;
 345                 GdkPixbuf *loading_icon = NULL;
 346                 gint width, height;
 347
 348                 gtk_tree_model_get (GTK_TREE_MODEL (priv->list_store),
 349                                     &iter,
 350                                     COLUMN_JOB, &job,
 351                                     -1);
 352
 353                 if (job) {
 354                         g_signal_handlers_disconnect_by_func (job, thumbnail_job_completed_callback, sidebar_thumbnails);
 355                         ev_job_cancel (EV_JOB (job));
 356                         g_object_unref (job);
 357                 }
 358
 359                 ev_thumbnails_size_cache_get_size (priv->size_cache, start_page,
 360                                                   priv->rotation,
 361                                                   &width, &height);
 362                 if (!loading_icon || (width != prev_width && height != prev_height)) {
 363                         loading_icon =
 364                                 ev_sidebar_thumbnails_get_loading_icon (sidebar_thumbnails,
 365                                                                         width, height);
 366                 }
 367
 368                 prev_width = width;
 369                 prev_height = height;
 370
 371                 gtk_list_store_set (priv->list_store, &iter,
 372                                     COLUMN_JOB, NULL,
 373                                     COLUMN_THUMBNAIL_SET, FALSE,
 374                                     COLUMN_PIXBUF, loading_icon,
 375                                     -1);
 376         }
 377         gtk_tree_path_free (path);
 378 }
 379
 380 static gdouble
 381 get_scale_for_page (EvSidebarThumbnails *sidebar_thumbnails,
 382                     gint                 page)
 383 {
 384         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 385         gdouble width;
 386
 387         ev_document_get_page_size (priv->document, page, &width, NULL);
 388
 389         return (gdouble)THUMBNAIL_WIDTH / width;
 390 }
 391
 392 static void
 393 add_range (EvSidebarThumbnails *sidebar_thumbnails,
 394            gint                 start_page,
 395            gint                 end_page)
 396 {
 397         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 398         GtkTreePath *path;
 399         GtkTreeIter iter;
 400         gboolean result;
 401         gint page = start_page;
 402
 403         g_assert (start_page <= end_page);
 404
 405         path = gtk_tree_path_new_from_indices (start_page, -1);
 406         for (result = gtk_tree_model_get_iter (GTK_TREE_MODEL (priv->list_store), &iter, path);
 407              result && page <= end_page;
 408              result = gtk_tree_model_iter_next (GTK_TREE_MODEL (priv->list_store), &iter), page ++) {
 409                 EvJob *job;
 410                 gboolean thumbnail_set;
 411
 412                 gtk_tree_model_get (GTK_TREE_MODEL (priv->list_store), &iter,
 413                                     COLUMN_JOB, &job,
 414                                     COLUMN_THUMBNAIL_SET, &thumbnail_set,
 415                                     -1);
 416
 417                 if (job == NULL && !thumbnail_set) {
 418                         job = ev_job_thumbnail_new (priv->document,
 419                                                     page, priv->rotation,
 420                                                     get_scale_for_page (sidebar_thumbnails, page));
 421                         ev_job_scheduler_push_job (EV_JOB (job), EV_JOB_PRIORITY_HIGH);
 422
 423                         g_object_set_data_full (G_OBJECT (job), "tree_iter",
 424                                                 gtk_tree_iter_copy (&iter),
 425                                                 (GDestroyNotify) gtk_tree_iter_free);
 426                         g_signal_connect (job, "finished",
 427                                           G_CALLBACK (thumbnail_job_completed_callback),
 428                                           sidebar_thumbnails);
 429                         gtk_list_store_set (priv->list_store, &iter,
 430                                             COLUMN_JOB, job,
 431                                             -1);
 432
 433                         /* The queue and the list own a ref to the job now */
 434                         g_object_unref (job);
 435                 } else if (job) {
 436                         g_object_unref (job);
 437                 }
 438         }
 439         gtk_tree_path_free (path);
 440 }
 441
 442 /* This modifies start */
 443 static void
 444 update_visible_range (EvSidebarThumbnails *sidebar_thumbnails,
 445                       gint                 start_page,
 446                       gint                 end_page)
 447 {
 448         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 449         int old_start_page, old_end_page;
 450
 451         old_start_page = priv->start_page;
 452         old_end_page = priv->end_page;
 453
 454         if (start_page == old_start_page &&
 455             end_page == old_end_page)
 456                 return;
 457
 458         /* Clear the areas we no longer display */
 459         if (old_start_page >= 0 && old_start_page < start_page)
 460                 clear_range (sidebar_thumbnails, old_start_page, MIN (start_page - 1, old_end_page));
 461
 462         if (old_end_page > 0 && old_end_page > end_page)
 463                 clear_range (sidebar_thumbnails, MAX (end_page + 1, old_start_page), old_end_page);
 464
 465         add_range (sidebar_thumbnails, start_page, end_page);
 466
 467         priv->start_page = start_page;
 468         priv->end_page = end_page;
 469 }
 470
 471 static void
 472 adjustment_changed_cb (EvSidebarThumbnails *sidebar_thumbnails)
 473 {
 474         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 475         GtkTreePath *path = NULL;
 476         GtkTreePath *path2 = NULL;
 477         gdouble page_size;
 478         gdouble value;
 479         gint wy1;
 480         gint wy2;
 481
 482         /* Widget is not currently visible */
 483         if (!gtk_widget_get_mapped (GTK_WIDGET (sidebar_thumbnails)))
 484                 return;
 485
 486         page_size = gtk_adjustment_get_page_size (priv->vadjustment);
 487
 488         if (page_size == 0)
 489                 return;
 490
 491         value = gtk_adjustment_get_value (priv->vadjustment);
 492
 493         if (priv->tree_view) {
 494                 if (! gtk_widget_get_realized (priv->tree_view))
 495                         return;
 496
 497                 gtk_tree_view_convert_tree_to_bin_window_coords (GTK_TREE_VIEW (priv->tree_view),
 498                                                                  0, (int) value,
 499                                                                  NULL, &wy1);
 500                 gtk_tree_view_convert_tree_to_bin_window_coords (GTK_TREE_VIEW (priv->tree_view),
 501                                                                  0, (int) (value + page_size),
 502                                                                  NULL, &wy2);
 503                 gtk_tree_view_get_path_at_pos (GTK_TREE_VIEW (priv->tree_view),
 504                                                1, wy1 + 1, &path,
 505                                                NULL, NULL, NULL);
 506                 gtk_tree_view_get_path_at_pos (GTK_TREE_VIEW (priv->tree_view),
 507                                                1, wy2 -1, &path2,
 508                                                NULL, NULL, NULL);
 509         } else if (priv->icon_view) {
 510                 if (! gtk_widget_get_realized (priv->icon_view))
 511                         return;
 512                 if (! gtk_icon_view_get_visible_range (GTK_ICON_VIEW (priv->icon_view), &path, &path2))
 513                         return;
 514         } else {
 515                 return;
 516         }
 517
 518         if (path && path2) {
 519                 update_visible_range (sidebar_thumbnails,
 520                                       gtk_tree_path_get_indices (path)[0],
 521                                       gtk_tree_path_get_indices (path2)[0]);
 522         }
 523
 524         gtk_tree_path_free (path);
 525         gtk_tree_path_free (path2);
 526 }
 527
 528 static void
 529 ev_sidebar_thumbnails_fill_model (EvSidebarThumbnails *sidebar_thumbnails)
 530 {
 531         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 532         GtkTreeIter iter;
 533         int i;
 534         gint prev_width = -1;
 535         gint prev_height = -1;
 536
 537         for (i = 0; i < sidebar_thumbnails->priv->n_pages; i++) {
 538                 gchar     *page_label;
 539                 gchar     *page_string;
 540                 GdkPixbuf *loading_icon = NULL;
 541                 gint       width, height;
 542
 543                 page_label = ev_document_get_page_label (priv->document, i);
 544                 page_string = g_markup_printf_escaped ("<i>%s</i>", page_label);
 545                 ev_thumbnails_size_cache_get_size (sidebar_thumbnails->priv->size_cache, i,
 546                                                   sidebar_thumbnails->priv->rotation,
 547                                                   &width, &height);
 548                 if (!loading_icon || (width != prev_width && height != prev_height)) {
 549                         loading_icon =
 550                                 ev_sidebar_thumbnails_get_loading_icon (sidebar_thumbnails,
 551                                                                         width, height);
 552                 }
 553
 554                 prev_width = width;
 555                 prev_height = height;
 556
 557                 gtk_list_store_append (priv->list_store, &iter);
 558                 gtk_list_store_set (priv->list_store, &iter,
 559                                     COLUMN_PAGE_STRING, page_string,
 560                                     COLUMN_PIXBUF, loading_icon,
 561                                     COLUMN_THUMBNAIL_SET, FALSE,
 562                                     -1);
 563                 g_free (page_label);
 564                 g_free (page_string);
 565         }
 566 }
 567
 568 static void
 569 ev_sidebar_tree_selection_changed (GtkTreeSelection *selection,
 570                                    EvSidebarThumbnails *ev_sidebar_thumbnails)
 571 {
 572         EvSidebarThumbnailsPrivate *priv = ev_sidebar_thumbnails->priv;
 573         GtkTreePath *path;
 574         GtkTreeIter iter;
 575         int page;
 576
 577         if (!gtk_tree_selection_get_selected (selection, NULL, &iter))
 578                 return;
 579
 580         path = gtk_tree_model_get_path (GTK_TREE_MODEL (priv->list_store),
 581                                         &iter);
 582         page = gtk_tree_path_get_indices (path)[0];
 583         gtk_tree_path_free (path);
 584
 585         ev_document_model_set_page (priv->model, page);
 586 }
 587
 588 static void
 589 ev_sidebar_icon_selection_changed (GtkIconView         *icon_view,
 590                                    EvSidebarThumbnails *ev_sidebar_thumbnails)
 591 {
 592         EvSidebarThumbnailsPrivate *priv = ev_sidebar_thumbnails->priv;
 593         GtkTreePath *path;
 594         GList *selected;
 595         int page;
 596
 597         selected = gtk_icon_view_get_selected_items (icon_view);
 598         if (selected == NULL)
 599                 return;
 600
 601         /* We don't handle or expect multiple selection. */
 602         g_assert (selected->next == NULL);
 603
 604         path = selected->data;
 605         page = gtk_tree_path_get_indices (path)[0];
 606
 607         gtk_tree_path_free (path);
 608         g_list_free (selected);
 609
 610         ev_document_model_set_page (priv->model, page);
 611 }
 612
 613 static void
 614 ev_sidebar_init_tree_view (EvSidebarThumbnails *ev_sidebar_thumbnails)
 615 {
 616         EvSidebarThumbnailsPrivate *priv;
 617         GtkTreeSelection *selection;
 618         GtkCellRenderer *renderer;
 619
 620         priv = ev_sidebar_thumbnails->priv;
 621         priv->tree_view = gtk_tree_view_new_with_model (GTK_TREE_MODEL (priv->list_store));
 622
 623         selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (priv->tree_view));
 624         g_signal_connect (selection, "changed",
 625                           G_CALLBACK (ev_sidebar_tree_selection_changed), ev_sidebar_thumbnails);
 626         gtk_tree_view_set_headers_visible (GTK_TREE_VIEW (priv->tree_view), FALSE);
 627         renderer = g_object_new (GTK_TYPE_CELL_RENDERER_PIXBUF,
 628                                  "xpad", 2,
 629                                  "ypad", 2,
 630                                  NULL);
 631         gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (priv->tree_view), -1,
 632                                                      NULL, renderer,
 633                                                      "pixbuf", 1,
 634                                                      NULL);
 635         gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (priv->tree_view), -1,
 636                                                      NULL, gtk_cell_renderer_text_new (),
 637                                                      "markup", 0, NULL);
 638         gtk_container_add (GTK_CONTAINER (priv->swindow), priv->tree_view);
 639         gtk_widget_show (priv->tree_view);
 640 }
 641
 642 static void
 643 ev_sidebar_init_icon_view (EvSidebarThumbnails *ev_sidebar_thumbnails)
 644 {
 645         EvSidebarThumbnailsPrivate *priv;
 646
 647         priv = ev_sidebar_thumbnails->priv;
 648
 649         priv->icon_view = gtk_icon_view_new_with_model (GTK_TREE_MODEL (priv->list_store));
 650         gtk_icon_view_set_markup_column (GTK_ICON_VIEW (priv->icon_view), 0);
 651         gtk_icon_view_set_pixbuf_column (GTK_ICON_VIEW (priv->icon_view), 1);
 652         g_signal_connect (priv->icon_view, "selection-changed",
 653                           G_CALLBACK (ev_sidebar_icon_selection_changed), ev_sidebar_thumbnails);
 654
 655         gtk_container_add (GTK_CONTAINER (priv->swindow), priv->icon_view);
 656         gtk_widget_show (priv->icon_view);
 657 }
 658
 659 static gboolean
 660 ev_sidebar_thumbnails_use_icon_view (EvSidebarThumbnails *sidebar_thumbnails)
 661 {
 662         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 663
 664         return (ev_document_get_n_pages (priv->document) <= MAX_ICON_VIEW_PAGE_COUNT);
 665 }
 666
 667 static void
 668 ev_sidebar_thumbnails_init (EvSidebarThumbnails *ev_sidebar_thumbnails)
 669 {
 670         EvSidebarThumbnailsPrivate *priv;
 671
 672         priv = ev_sidebar_thumbnails->priv = EV_SIDEBAR_THUMBNAILS_GET_PRIVATE (ev_sidebar_thumbnails);
 673
 674         priv->list_store = gtk_list_store_new (NUM_COLUMNS,
 675                                                G_TYPE_STRING,
 676                                                GDK_TYPE_PIXBUF,
 677                                                G_TYPE_BOOLEAN,
 678                                                EV_TYPE_JOB_THUMBNAIL);
 679
 680         priv->swindow = gtk_scrolled_window_new (NULL, NULL);
 681
 682         /* We actually don't want GTK_POLICY_AUTOMATIC for horizontal scrollbar here
 683          * it's just a workaround for bug #449462
 684          */
 685         gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (priv->swindow),
 686                                         GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);
 687         gtk_scrolled_window_set_shadow_type (GTK_SCROLLED_WINDOW (priv->swindow),
 688                                              GTK_SHADOW_IN);
 689         priv->vadjustment = gtk_scrolled_window_get_vadjustment (GTK_SCROLLED_WINDOW (priv->swindow));
 690         g_signal_connect_data (priv->vadjustment, "value-changed",
 691                                G_CALLBACK (adjustment_changed_cb),
 692                                ev_sidebar_thumbnails, NULL,
 693                                G_CONNECT_SWAPPED | G_CONNECT_AFTER);
 694         g_signal_connect_swapped (priv->swindow, "size-allocate",
 695                                   G_CALLBACK (adjustment_changed_cb),
 696                                   ev_sidebar_thumbnails);
 697         gtk_box_pack_start (GTK_BOX (ev_sidebar_thumbnails), priv->swindow, TRUE, TRUE, 0);
 698
 699         /* Put it all together */
 700         gtk_widget_show_all (priv->swindow);
 701 }
 702
 703 static void
 704 ev_sidebar_thumbnails_set_current_page (EvSidebarThumbnails *sidebar,
 705                                         gint                 page)
 706 {
 707         GtkTreeView *tree_view;
 708         GtkTreePath *path;
 709
 710         path = gtk_tree_path_new_from_indices (page, -1);
 711
 712         if (sidebar->priv->tree_view) {
 713                 tree_view = GTK_TREE_VIEW (sidebar->priv->tree_view);
 714                 gtk_tree_view_set_cursor (tree_view, path, NULL, FALSE);
 715                 gtk_tree_view_scroll_to_cell (tree_view, path, NULL, FALSE, 0.0, 0.0);
 716         } else if (sidebar->priv->icon_view) {
 717
 718                 g_signal_handlers_block_by_func
 719                         (sidebar->priv->icon_view,
 720                          G_CALLBACK (ev_sidebar_icon_selection_changed), sidebar);
 721
 722                 gtk_icon_view_select_path (GTK_ICON_VIEW (sidebar->priv->icon_view), path);
 723
 724                 g_signal_handlers_unblock_by_func
 725                         (sidebar->priv->icon_view,
 726                          G_CALLBACK (ev_sidebar_icon_selection_changed), sidebar);
 727
 728                 gtk_icon_view_scroll_to_path (GTK_ICON_VIEW (sidebar->priv->icon_view), path, FALSE, 0.0, 0.0);
 729         }
 730
 731         gtk_tree_path_free (path);
 732 }
 733
 734 static void
 735 page_changed_cb (EvSidebarThumbnails *sidebar,
 736                  gint                 old_page,
 737                  gint                 new_page)
 738 {
 739         ev_sidebar_thumbnails_set_current_page (sidebar, new_page);
 740 }
 741
 742 static gboolean
 743 refresh (EvSidebarThumbnails *sidebar_thumbnails)
 744 {
 745         adjustment_changed_cb (sidebar_thumbnails);
 746         return FALSE;
 747 }
 748
 749 static void
 750 ev_sidebar_thumbnails_reload (EvSidebarThumbnails *sidebar_thumbnails)
 751 {
 752         EvDocumentModel *model;
 753
 754         if (sidebar_thumbnails->priv->loading_icons)
 755                 g_hash_table_remove_all (sidebar_thumbnails->priv->loading_icons);
 756
 757         if (sidebar_thumbnails->priv->document == NULL ||
 758             sidebar_thumbnails->priv->n_pages <= 0)
 759                 return;
 760
 761         model = sidebar_thumbnails->priv->model;
 762
 763         ev_sidebar_thumbnails_clear_model (sidebar_thumbnails);
 764         ev_sidebar_thumbnails_fill_model (sidebar_thumbnails);
 765
 766         /* Trigger a redraw */
 767         sidebar_thumbnails->priv->start_page = -1;
 768         sidebar_thumbnails->priv->end_page = -1;
 769         ev_sidebar_thumbnails_set_current_page (sidebar_thumbnails,
 770                                                 ev_document_model_get_page (model));
 771         g_idle_add ((GSourceFunc)refresh, sidebar_thumbnails);
 772 }
 773
 774 static void
 775 ev_sidebar_thumbnails_rotation_changed_cb (EvDocumentModel     *model,
 776                                            GParamSpec          *pspec,
 777                                            EvSidebarThumbnails *sidebar_thumbnails)
 778 {
 779         gint rotation = ev_document_model_get_rotation (model);
 780
 781         sidebar_thumbnails->priv->rotation = rotation;
 782         ev_sidebar_thumbnails_reload (sidebar_thumbnails);
 783 }
 784
 785 static void
 786 ev_sidebar_thumbnails_inverted_colors_changed_cb (EvDocumentModel     *model,
 787                                                   GParamSpec          *pspec,
 788                                                   EvSidebarThumbnails *sidebar_thumbnails)
 789 {
 790         gboolean inverted_colors = ev_document_model_get_inverted_colors (model);
 791
 792         sidebar_thumbnails->priv->inverted_colors = inverted_colors;
 793         ev_sidebar_thumbnails_reload (sidebar_thumbnails);
 794 }
 795
 796 static void
 797 thumbnail_job_completed_callback (EvJobThumbnail      *job,
 798                                   EvSidebarThumbnails *sidebar_thumbnails)
 799 {
 800         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 801         GtkTreeIter *iter;
 802
 803         iter = (GtkTreeIter *) g_object_get_data (G_OBJECT (job), "tree_iter");
 804         if (priv->inverted_colors)
 805                 ev_document_misc_invert_pixbuf (job->thumbnail);
 806         gtk_list_store_set (priv->list_store,
 807                             iter,
 808                             COLUMN_PIXBUF, job->thumbnail,
 809                             COLUMN_THUMBNAIL_SET, TRUE,
 810                             COLUMN_JOB, NULL,
 811                             -1);
 812 }
 813
 814 static void
 815 ev_sidebar_thumbnails_document_changed_cb (EvDocumentModel     *model,
 816                                            GParamSpec          *pspec,
 817                                            EvSidebarThumbnails *sidebar_thumbnails)
 818 {
 819         EvDocument *document = ev_document_model_get_document (model);
 820         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 821
 822         if (ev_document_get_n_pages (document) <= 0 ||
 823             !ev_document_check_dimensions (document)) {
 824                 return;
 825         }
 826
 827         priv->size_cache = ev_thumbnails_size_cache_get (document);
 828         priv->document = document;
 829         priv->n_pages = ev_document_get_n_pages (document);
 830         priv->rotation = ev_document_model_get_rotation (model);
 831         priv->inverted_colors = ev_document_model_get_inverted_colors (model);
 832         priv->loading_icons = g_hash_table_new_full (g_str_hash,
 833                                                      g_str_equal,
 834                                                      (GDestroyNotify)g_free,
 835                                                      (GDestroyNotify)g_object_unref);
 836
 837         ev_sidebar_thumbnails_clear_model (sidebar_thumbnails);
 838         ev_sidebar_thumbnails_fill_model (sidebar_thumbnails);
 839
 840         /* Create the view widget, and remove the old one, if needed */
 841         if (ev_sidebar_thumbnails_use_icon_view (sidebar_thumbnails)) {
 842                 if (priv->tree_view) {
 843                         gtk_container_remove (GTK_CONTAINER (priv->swindow), priv->tree_view);
 844                         priv->tree_view = NULL;
 845                 }
 846
 847                 if (! priv->icon_view) {
 848                         ev_sidebar_init_icon_view (sidebar_thumbnails);
 849                         g_object_notify (G_OBJECT (sidebar_thumbnails), "main_widget");
 850                 } else {
 851                         gtk_widget_queue_resize (priv->icon_view);
 852                 }
 853         } else {
 854                 if (priv->icon_view) {
 855                         gtk_container_remove (GTK_CONTAINER (priv->swindow), priv->icon_view);
 856                         priv->icon_view = NULL;
 857                 }
 858
 859                 if (! priv->tree_view) {
 860                         ev_sidebar_init_tree_view (sidebar_thumbnails);
 861                         g_object_notify (G_OBJECT (sidebar_thumbnails), "main_widget");
 862                 }
 863         }
 864
 865         /* Connect to the signal and trigger a fake callback */
 866         g_signal_connect_swapped (priv->model, "page-changed",
 867                                   G_CALLBACK (page_changed_cb),
 868                                   sidebar_thumbnails);
 869         g_signal_connect (priv->model, "notify::rotation",
 870                           G_CALLBACK (ev_sidebar_thumbnails_rotation_changed_cb),
 871                           sidebar_thumbnails);
 872         g_signal_connect (priv->model, "notify::inverted-colors",
 873                           G_CALLBACK (ev_sidebar_thumbnails_inverted_colors_changed_cb),
 874                           sidebar_thumbnails);
 875         sidebar_thumbnails->priv->start_page = -1;
 876         sidebar_thumbnails->priv->end_page = -1;
 877         ev_sidebar_thumbnails_set_current_page (sidebar_thumbnails,
 878                                                 ev_document_model_get_page (model));
 879         adjustment_changed_cb (sidebar_thumbnails);
 880 }
 881
 882 static void
 883 ev_sidebar_thumbnails_set_model (EvSidebarPage   *sidebar_page,
 884                                  EvDocumentModel *model)
 885 {
 886         EvSidebarThumbnails *sidebar_thumbnails = EV_SIDEBAR_THUMBNAILS (sidebar_page);
 887         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 888
 889         if (priv->model == model)
 890                 return;
 891
 892         priv->model = model;
 893         g_signal_connect (model, "notify::document",
 894                           G_CALLBACK (ev_sidebar_thumbnails_document_changed_cb),
 895                           sidebar_page);
 896 }
 897
 898 static gboolean
 899 ev_sidebar_thumbnails_clear_job (GtkTreeModel *model,
 900                                  GtkTreePath *path,
 901                                  GtkTreeIter *iter,
 902                                  gpointer data)
 903 {
 904         EvJob *job;
 905
 906         gtk_tree_model_get (model, iter, COLUMN_JOB, &job, -1);
 907
 908         if (job != NULL) {
 909                 ev_job_cancel (job);
 910                 g_signal_handlers_disconnect_by_func (job, thumbnail_job_completed_callback, data);
 911                 g_object_unref (job);
 912         }
 913
 914         return FALSE;
 915 }
 916
 917 static void
 918 ev_sidebar_thumbnails_clear_model (EvSidebarThumbnails *sidebar_thumbnails)
 919 {
 920         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 921
 922         gtk_tree_model_foreach (GTK_TREE_MODEL (priv->list_store), ev_sidebar_thumbnails_clear_job, sidebar_thumbnails);
 923         gtk_list_store_clear (priv->list_store);
 924 }
 925
 926 static gboolean
 927 ev_sidebar_thumbnails_support_document (EvSidebarPage   *sidebar_page,
 928                                         EvDocument *document)
 929 {
 930         return TRUE;
 931 }
 932
 933 static const gchar*
 934 ev_sidebar_thumbnails_get_label (EvSidebarPage *sidebar_page)
 935 {
 936         return _("Thumbnails");
 937 }
 938
 939 static void
 940 ev_sidebar_thumbnails_page_iface_init (EvSidebarPageInterface *iface)
 941 {
 942         iface->support_document = ev_sidebar_thumbnails_support_document;
 943         iface->set_model = ev_sidebar_thumbnails_set_model;
 944         iface->get_label = ev_sidebar_thumbnails_get_label;
 945 }