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         GtkObjectClass *gtk_object_class;
 277         GtkWidgetClass *widget_class;
 278
 279         g_object_class = G_OBJECT_CLASS (ev_sidebar_thumbnails_class);
 280         gtk_object_class = GTK_OBJECT_CLASS (ev_sidebar_thumbnails_class);
 281         widget_class = GTK_WIDGET_CLASS (ev_sidebar_thumbnails_class);
 282
 283         g_object_class->dispose = ev_sidebar_thumbnails_dispose;
 284         g_object_class->get_property = ev_sidebar_thumbnails_get_property;
 285         widget_class->map = ev_sidebar_thumbnails_map;
 286
 287         g_object_class_override_property (g_object_class,
 288                                           PROP_WIDGET,
 289                                           "main-widget");
 290
 291         g_type_class_add_private (g_object_class, sizeof (EvSidebarThumbnailsPrivate));
 292 }
 293
 294 GtkWidget *
 295 ev_sidebar_thumbnails_new (void)
 296 {
 297         GtkWidget *ev_sidebar_thumbnails;
 298
 299         ev_sidebar_thumbnails = g_object_new (EV_TYPE_SIDEBAR_THUMBNAILS, NULL);
 300
 301         return ev_sidebar_thumbnails;
 302 }
 303
 304 static GdkPixbuf *
 305 ev_sidebar_thumbnails_get_loading_icon (EvSidebarThumbnails *sidebar_thumbnails,
 306                                         gint                 width,
 307                                         gint                 height)
 308 {
 309         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 310         GdkPixbuf *icon;
 311         gchar     *key;
 312
 313         key = g_strdup_printf ("%dx%d", width, height);
 314         icon = g_hash_table_lookup (priv->loading_icons, key);
 315         if (!icon) {
 316                 gboolean inverted_colors;
 317
 318                 inverted_colors = ev_document_model_get_inverted_colors (priv->model);
 319                 icon = ev_document_misc_get_loading_thumbnail (width, height, inverted_colors);
 320                 g_hash_table_insert (priv->loading_icons, key, icon);
 321         } else {
 322                 g_free (key);
 323         }
 324
 325         return icon;
 326 }
 327
 328 static void
 329 clear_range (EvSidebarThumbnails *sidebar_thumbnails,
 330              gint                 start_page,
 331              gint                 end_page)
 332 {
 333         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 334         GtkTreePath *path;
 335         GtkTreeIter iter;
 336         gboolean result;
 337         gint prev_width = -1;
 338         gint prev_height = -1;
 339
 340         g_assert (start_page <= end_page);
 341
 342         path = gtk_tree_path_new_from_indices (start_page, -1);
 343         for (result = gtk_tree_model_get_iter (GTK_TREE_MODEL (priv->list_store), &iter, path);
 344              result && start_page <= end_page;
 345              result = gtk_tree_model_iter_next (GTK_TREE_MODEL (priv->list_store), &iter), start_page ++) {
 346                 EvJobThumbnail *job;
 347                 GdkPixbuf *loading_icon = NULL;
 348                 gint width, height;
 349
 350                 gtk_tree_model_get (GTK_TREE_MODEL (priv->list_store),
 351                                     &iter,
 352                                     COLUMN_JOB, &job,
 353                                     -1);
 354
 355                 if (job) {
 356                         g_signal_handlers_disconnect_by_func (job, thumbnail_job_completed_callback, sidebar_thumbnails);
 357                         ev_job_cancel (EV_JOB (job));
 358                         g_object_unref (job);
 359                 }
 360
 361                 ev_thumbnails_size_cache_get_size (priv->size_cache, start_page,
 362                                                   priv->rotation,
 363                                                   &width, &height);
 364                 if (!loading_icon || (width != prev_width && height != prev_height)) {
 365                         loading_icon =
 366                                 ev_sidebar_thumbnails_get_loading_icon (sidebar_thumbnails,
 367                                                                         width, height);
 368                 }
 369
 370                 prev_width = width;
 371                 prev_height = height;
 372
 373                 gtk_list_store_set (priv->list_store, &iter,
 374                                     COLUMN_JOB, NULL,
 375                                     COLUMN_THUMBNAIL_SET, FALSE,
 376                                     COLUMN_PIXBUF, loading_icon,
 377                                     -1);
 378         }
 379         gtk_tree_path_free (path);
 380 }
 381
 382 static gdouble
 383 get_scale_for_page (EvSidebarThumbnails *sidebar_thumbnails,
 384                     gint                 page)
 385 {
 386         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 387         gdouble width;
 388
 389         ev_document_get_page_size (priv->document, page, &width, NULL);
 390
 391         return (gdouble)THUMBNAIL_WIDTH / width;
 392 }
 393
 394 static void
 395 add_range (EvSidebarThumbnails *sidebar_thumbnails,
 396            gint                 start_page,
 397            gint                 end_page)
 398 {
 399         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 400         GtkTreePath *path;
 401         GtkTreeIter iter;
 402         gboolean result;
 403         gint page = start_page;
 404
 405         g_assert (start_page <= end_page);
 406
 407         path = gtk_tree_path_new_from_indices (start_page, -1);
 408         for (result = gtk_tree_model_get_iter (GTK_TREE_MODEL (priv->list_store), &iter, path);
 409              result && page <= end_page;
 410              result = gtk_tree_model_iter_next (GTK_TREE_MODEL (priv->list_store), &iter), page ++) {
 411                 EvJob *job;
 412                 gboolean thumbnail_set;
 413
 414                 gtk_tree_model_get (GTK_TREE_MODEL (priv->list_store), &iter,
 415                                     COLUMN_JOB, &job,
 416                                     COLUMN_THUMBNAIL_SET, &thumbnail_set,
 417                                     -1);
 418
 419                 if (job == NULL && !thumbnail_set) {
 420                         job = ev_job_thumbnail_new (priv->document,
 421                                                     page, priv->rotation,
 422                                                     get_scale_for_page (sidebar_thumbnails, page));
 423                         ev_job_scheduler_push_job (EV_JOB (job), EV_JOB_PRIORITY_HIGH);
 424
 425                         g_object_set_data_full (G_OBJECT (job), "tree_iter",
 426                                                 gtk_tree_iter_copy (&iter),
 427                                                 (GDestroyNotify) gtk_tree_iter_free);
 428                         g_signal_connect (job, "finished",
 429                                           G_CALLBACK (thumbnail_job_completed_callback),
 430                                           sidebar_thumbnails);
 431                         gtk_list_store_set (priv->list_store, &iter,
 432                                             COLUMN_JOB, job,
 433                                             -1);
 434
 435                         /* The queue and the list own a ref to the job now */
 436                         g_object_unref (job);
 437                 } else if (job) {
 438                         g_object_unref (job);
 439                 }
 440         }
 441         gtk_tree_path_free (path);
 442 }
 443
 444 /* This modifies start */
 445 static void
 446 update_visible_range (EvSidebarThumbnails *sidebar_thumbnails,
 447                       gint                 start_page,
 448                       gint                 end_page)
 449 {
 450         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 451         int old_start_page, old_end_page;
 452
 453         old_start_page = priv->start_page;
 454         old_end_page = priv->end_page;
 455
 456         if (start_page == old_start_page &&
 457             end_page == old_end_page)
 458                 return;
 459
 460         /* Clear the areas we no longer display */
 461         if (old_start_page >= 0 && old_start_page < start_page)
 462                 clear_range (sidebar_thumbnails, old_start_page, MIN (start_page - 1, old_end_page));
 463
 464         if (old_end_page > 0 && old_end_page > end_page)
 465                 clear_range (sidebar_thumbnails, MAX (end_page + 1, old_start_page), old_end_page);
 466
 467         add_range (sidebar_thumbnails, start_page, end_page);
 468
 469         priv->start_page = start_page;
 470         priv->end_page = end_page;
 471 }
 472
 473 static void
 474 adjustment_changed_cb (EvSidebarThumbnails *sidebar_thumbnails)
 475 {
 476         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 477         GtkTreePath *path = NULL;
 478         GtkTreePath *path2 = NULL;
 479         gdouble page_size;
 480         gdouble value;
 481         gint wy1;
 482         gint wy2;
 483
 484         /* Widget is not currently visible */
 485         if (!gtk_widget_get_mapped (GTK_WIDGET (sidebar_thumbnails)))
 486                 return;
 487
 488         page_size = gtk_adjustment_get_page_size (priv->vadjustment);
 489
 490         if (page_size == 0)
 491                 return;
 492
 493         value = gtk_adjustment_get_value (priv->vadjustment);
 494
 495         if (priv->tree_view) {
 496                 if (! gtk_widget_get_realized (priv->tree_view))
 497                         return;
 498
 499                 gtk_tree_view_convert_tree_to_bin_window_coords (GTK_TREE_VIEW (priv->tree_view),
 500                                                                  0, (int) value,
 501                                                                  NULL, &wy1);
 502                 gtk_tree_view_convert_tree_to_bin_window_coords (GTK_TREE_VIEW (priv->tree_view),
 503                                                                  0, (int) (value + page_size),
 504                                                                  NULL, &wy2);
 505                 gtk_tree_view_get_path_at_pos (GTK_TREE_VIEW (priv->tree_view),
 506                                                1, wy1 + 1, &path,
 507                                                NULL, NULL, NULL);
 508                 gtk_tree_view_get_path_at_pos (GTK_TREE_VIEW (priv->tree_view),
 509                                                1, wy2 -1, &path2,
 510                                                NULL, NULL, NULL);
 511         } else if (priv->icon_view) {
 512                 if (! gtk_widget_get_realized (priv->icon_view))
 513                         return;
 514                 if (! gtk_icon_view_get_visible_range (GTK_ICON_VIEW (priv->icon_view), &path, &path2))
 515                         return;
 516         } else {
 517                 return;
 518         }
 519
 520         if (path && path2) {
 521                 update_visible_range (sidebar_thumbnails,
 522                                       gtk_tree_path_get_indices (path)[0],
 523                                       gtk_tree_path_get_indices (path2)[0]);
 524         }
 525
 526         gtk_tree_path_free (path);
 527         gtk_tree_path_free (path2);
 528 }
 529
 530 static void
 531 ev_sidebar_thumbnails_fill_model (EvSidebarThumbnails *sidebar_thumbnails)
 532 {
 533         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 534         GtkTreeIter iter;
 535         int i;
 536         gint prev_width = -1;
 537         gint prev_height = -1;
 538
 539         for (i = 0; i < sidebar_thumbnails->priv->n_pages; i++) {
 540                 gchar     *page_label;
 541                 gchar     *page_string;
 542                 GdkPixbuf *loading_icon = NULL;
 543                 gint       width, height;
 544
 545                 page_label = ev_document_get_page_label (priv->document, i);
 546                 page_string = g_markup_printf_escaped ("<i>%s</i>", page_label);
 547                 ev_thumbnails_size_cache_get_size (sidebar_thumbnails->priv->size_cache, i,
 548                                                   sidebar_thumbnails->priv->rotation,
 549                                                   &width, &height);
 550                 if (!loading_icon || (width != prev_width && height != prev_height)) {
 551                         loading_icon =
 552                                 ev_sidebar_thumbnails_get_loading_icon (sidebar_thumbnails,
 553                                                                         width, height);
 554                 }
 555
 556                 prev_width = width;
 557                 prev_height = height;
 558
 559                 gtk_list_store_append (priv->list_store, &iter);
 560                 gtk_list_store_set (priv->list_store, &iter,
 561                                     COLUMN_PAGE_STRING, page_string,
 562                                     COLUMN_PIXBUF, loading_icon,
 563                                     COLUMN_THUMBNAIL_SET, FALSE,
 564                                     -1);
 565                 g_free (page_label);
 566                 g_free (page_string);
 567         }
 568 }
 569
 570 static void
 571 ev_sidebar_tree_selection_changed (GtkTreeSelection *selection,
 572                                    EvSidebarThumbnails *ev_sidebar_thumbnails)
 573 {
 574         EvSidebarThumbnailsPrivate *priv = ev_sidebar_thumbnails->priv;
 575         GtkTreePath *path;
 576         GtkTreeIter iter;
 577         int page;
 578
 579         if (!gtk_tree_selection_get_selected (selection, NULL, &iter))
 580                 return;
 581
 582         path = gtk_tree_model_get_path (GTK_TREE_MODEL (priv->list_store),
 583                                         &iter);
 584         page = gtk_tree_path_get_indices (path)[0];
 585         gtk_tree_path_free (path);
 586
 587         ev_document_model_set_page (priv->model, page);
 588 }
 589
 590 static void
 591 ev_sidebar_icon_selection_changed (GtkIconView         *icon_view,
 592                                    EvSidebarThumbnails *ev_sidebar_thumbnails)
 593 {
 594         EvSidebarThumbnailsPrivate *priv = ev_sidebar_thumbnails->priv;
 595         GtkTreePath *path;
 596         GList *selected;
 597         int page;
 598
 599         selected = gtk_icon_view_get_selected_items (icon_view);
 600         if (selected == NULL)
 601                 return;
 602
 603         /* We don't handle or expect multiple selection. */
 604         g_assert (selected->next == NULL);
 605
 606         path = selected->data;
 607         page = gtk_tree_path_get_indices (path)[0];
 608
 609         gtk_tree_path_free (path);
 610         g_list_free (selected);
 611
 612         ev_document_model_set_page (priv->model, page);
 613 }
 614
 615 static void
 616 ev_sidebar_init_tree_view (EvSidebarThumbnails *ev_sidebar_thumbnails)
 617 {
 618         EvSidebarThumbnailsPrivate *priv;
 619         GtkTreeSelection *selection;
 620         GtkCellRenderer *renderer;
 621
 622         priv = ev_sidebar_thumbnails->priv;
 623         priv->tree_view = gtk_tree_view_new_with_model (GTK_TREE_MODEL (priv->list_store));
 624
 625         selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (priv->tree_view));
 626         g_signal_connect (selection, "changed",
 627                           G_CALLBACK (ev_sidebar_tree_selection_changed), ev_sidebar_thumbnails);
 628         gtk_tree_view_set_headers_visible (GTK_TREE_VIEW (priv->tree_view), FALSE);
 629         renderer = g_object_new (GTK_TYPE_CELL_RENDERER_PIXBUF,
 630                                  "xpad", 2,
 631                                  "ypad", 2,
 632                                  NULL);
 633         gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (priv->tree_view), -1,
 634                                                      NULL, renderer,
 635                                                      "pixbuf", 1,
 636                                                      NULL);
 637         gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (priv->tree_view), -1,
 638                                                      NULL, gtk_cell_renderer_text_new (),
 639                                                      "markup", 0, NULL);
 640         gtk_container_add (GTK_CONTAINER (priv->swindow), priv->tree_view);
 641         gtk_widget_show (priv->tree_view);
 642 }
 643
 644 static void
 645 ev_sidebar_init_icon_view (EvSidebarThumbnails *ev_sidebar_thumbnails)
 646 {
 647         EvSidebarThumbnailsPrivate *priv;
 648
 649         priv = ev_sidebar_thumbnails->priv;
 650
 651         priv->icon_view = gtk_icon_view_new_with_model (GTK_TREE_MODEL (priv->list_store));
 652         gtk_icon_view_set_markup_column (GTK_ICON_VIEW (priv->icon_view), 0);
 653         gtk_icon_view_set_pixbuf_column (GTK_ICON_VIEW (priv->icon_view), 1);
 654         g_signal_connect (priv->icon_view, "selection-changed",
 655                           G_CALLBACK (ev_sidebar_icon_selection_changed), ev_sidebar_thumbnails);
 656
 657         gtk_container_add (GTK_CONTAINER (priv->swindow), priv->icon_view);
 658         gtk_widget_show (priv->icon_view);
 659 }
 660
 661 static gboolean
 662 ev_sidebar_thumbnails_use_icon_view (EvSidebarThumbnails *sidebar_thumbnails)
 663 {
 664         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 665
 666         return (ev_document_get_n_pages (priv->document) <= MAX_ICON_VIEW_PAGE_COUNT);
 667 }
 668
 669 static void
 670 ev_sidebar_thumbnails_init (EvSidebarThumbnails *ev_sidebar_thumbnails)
 671 {
 672         EvSidebarThumbnailsPrivate *priv;
 673
 674         priv = ev_sidebar_thumbnails->priv = EV_SIDEBAR_THUMBNAILS_GET_PRIVATE (ev_sidebar_thumbnails);
 675
 676         priv->list_store = gtk_list_store_new (NUM_COLUMNS,
 677                                                G_TYPE_STRING,
 678                                                GDK_TYPE_PIXBUF,
 679                                                G_TYPE_BOOLEAN,
 680                                                EV_TYPE_JOB_THUMBNAIL);
 681
 682         priv->swindow = gtk_scrolled_window_new (NULL, NULL);
 683
 684         /* We actually don't want GTK_POLICY_AUTOMATIC for horizontal scrollbar here
 685          * it's just a workaround for bug #449462
 686          */
 687         gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (priv->swindow),
 688                                         GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);
 689         gtk_scrolled_window_set_shadow_type (GTK_SCROLLED_WINDOW (priv->swindow),
 690                                              GTK_SHADOW_IN);
 691         priv->vadjustment = gtk_scrolled_window_get_vadjustment (GTK_SCROLLED_WINDOW (priv->swindow));
 692         g_signal_connect_data (priv->vadjustment, "value-changed",
 693                                G_CALLBACK (adjustment_changed_cb),
 694                                ev_sidebar_thumbnails, NULL,
 695                                G_CONNECT_SWAPPED | G_CONNECT_AFTER);
 696         g_signal_connect_swapped (priv->swindow, "size-allocate",
 697                                   G_CALLBACK (adjustment_changed_cb),
 698                                   ev_sidebar_thumbnails);
 699         gtk_box_pack_start (GTK_BOX (ev_sidebar_thumbnails), priv->swindow, TRUE, TRUE, 0);
 700
 701         /* Put it all together */
 702         gtk_widget_show_all (priv->swindow);
 703 }
 704
 705 static void
 706 ev_sidebar_thumbnails_set_current_page (EvSidebarThumbnails *sidebar,
 707                                         gint                 page)
 708 {
 709         GtkTreeView *tree_view;
 710         GtkTreePath *path;
 711
 712         path = gtk_tree_path_new_from_indices (page, -1);
 713
 714         if (sidebar->priv->tree_view) {
 715                 tree_view = GTK_TREE_VIEW (sidebar->priv->tree_view);
 716                 gtk_tree_view_set_cursor (tree_view, path, NULL, FALSE);
 717                 gtk_tree_view_scroll_to_cell (tree_view, path, NULL, FALSE, 0.0, 0.0);
 718         } else if (sidebar->priv->icon_view) {
 719
 720                 g_signal_handlers_block_by_func
 721                         (sidebar->priv->icon_view,
 722                          G_CALLBACK (ev_sidebar_icon_selection_changed), sidebar);
 723
 724                 gtk_icon_view_select_path (GTK_ICON_VIEW (sidebar->priv->icon_view), path);
 725
 726                 g_signal_handlers_unblock_by_func
 727                         (sidebar->priv->icon_view,
 728                          G_CALLBACK (ev_sidebar_icon_selection_changed), sidebar);
 729
 730                 gtk_icon_view_set_cursor (GTK_ICON_VIEW (sidebar->priv->icon_view), path, NULL, FALSE);
 731         }
 732
 733         gtk_tree_path_free (path);
 734 }
 735
 736 static void
 737 page_changed_cb (EvSidebarThumbnails *sidebar,
 738                  gint                 old_page,
 739                  gint                 new_page)
 740 {
 741         ev_sidebar_thumbnails_set_current_page (sidebar, new_page);
 742 }
 743
 744 static gboolean
 745 refresh (EvSidebarThumbnails *sidebar_thumbnails)
 746 {
 747         adjustment_changed_cb (sidebar_thumbnails);
 748         return FALSE;
 749 }
 750
 751 static void
 752 ev_sidebar_thumbnails_reload (EvSidebarThumbnails *sidebar_thumbnails)
 753 {
 754         EvDocumentModel *model;
 755
 756         if (sidebar_thumbnails->priv->loading_icons)
 757                 g_hash_table_remove_all (sidebar_thumbnails->priv->loading_icons);
 758
 759         if (sidebar_thumbnails->priv->document == NULL ||
 760             sidebar_thumbnails->priv->n_pages <= 0)
 761                 return;
 762
 763         model = sidebar_thumbnails->priv->model;
 764
 765         ev_sidebar_thumbnails_clear_model (sidebar_thumbnails);
 766         ev_sidebar_thumbnails_fill_model (sidebar_thumbnails);
 767
 768         /* Trigger a redraw */
 769         sidebar_thumbnails->priv->start_page = -1;
 770         sidebar_thumbnails->priv->end_page = -1;
 771         ev_sidebar_thumbnails_set_current_page (sidebar_thumbnails,
 772                                                 ev_document_model_get_page (model));
 773         g_idle_add ((GSourceFunc)refresh, sidebar_thumbnails);
 774 }
 775
 776 static void
 777 ev_sidebar_thumbnails_rotation_changed_cb (EvDocumentModel     *model,
 778                                            GParamSpec          *pspec,
 779                                            EvSidebarThumbnails *sidebar_thumbnails)
 780 {
 781         gint rotation = ev_document_model_get_rotation (model);
 782
 783         sidebar_thumbnails->priv->rotation = rotation;
 784         ev_sidebar_thumbnails_reload (sidebar_thumbnails);
 785 }
 786
 787 static void
 788 ev_sidebar_thumbnails_inverted_colors_changed_cb (EvDocumentModel     *model,
 789                                                   GParamSpec          *pspec,
 790                                                   EvSidebarThumbnails *sidebar_thumbnails)
 791 {
 792         gboolean inverted_colors = ev_document_model_get_inverted_colors (model);
 793
 794         sidebar_thumbnails->priv->inverted_colors = inverted_colors;
 795         ev_sidebar_thumbnails_reload (sidebar_thumbnails);
 796 }
 797
 798 static void
 799 thumbnail_job_completed_callback (EvJobThumbnail      *job,
 800                                   EvSidebarThumbnails *sidebar_thumbnails)
 801 {
 802         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 803         GtkTreeIter *iter;
 804
 805         iter = (GtkTreeIter *) g_object_get_data (G_OBJECT (job), "tree_iter");
 806         if (priv->inverted_colors)
 807                 ev_document_misc_invert_pixbuf (job->thumbnail);
 808         gtk_list_store_set (priv->list_store,
 809                             iter,
 810                             COLUMN_PIXBUF, job->thumbnail,
 811                             COLUMN_THUMBNAIL_SET, TRUE,
 812                             COLUMN_JOB, NULL,
 813                             -1);
 814 }
 815
 816 static void
 817 ev_sidebar_thumbnails_document_changed_cb (EvDocumentModel     *model,
 818                                            GParamSpec          *pspec,
 819                                            EvSidebarThumbnails *sidebar_thumbnails)
 820 {
 821         EvDocument *document = ev_document_model_get_document (model);
 822         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 823
 824         if (ev_document_get_n_pages (document) <= 0 ||
 825             !ev_document_check_dimensions (document)) {
 826                 return;
 827         }
 828
 829         priv->size_cache = ev_thumbnails_size_cache_get (document);
 830         priv->document = document;
 831         priv->n_pages = ev_document_get_n_pages (document);
 832         priv->rotation = ev_document_model_get_rotation (model);
 833         priv->inverted_colors = ev_document_model_get_inverted_colors (model);
 834         priv->loading_icons = g_hash_table_new_full (g_str_hash,
 835                                                      g_str_equal,
 836                                                      (GDestroyNotify)g_free,
 837                                                      (GDestroyNotify)g_object_unref);
 838
 839         ev_sidebar_thumbnails_clear_model (sidebar_thumbnails);
 840         ev_sidebar_thumbnails_fill_model (sidebar_thumbnails);
 841
 842         /* Create the view widget, and remove the old one, if needed */
 843         if (ev_sidebar_thumbnails_use_icon_view (sidebar_thumbnails)) {
 844                 if (priv->tree_view) {
 845                         gtk_container_remove (GTK_CONTAINER (priv->swindow), priv->tree_view);
 846                         priv->tree_view = NULL;
 847                 }
 848
 849                 if (! priv->icon_view) {
 850                         ev_sidebar_init_icon_view (sidebar_thumbnails);
 851                         g_object_notify (G_OBJECT (sidebar_thumbnails), "main_widget");
 852                 } else {
 853                         gtk_widget_queue_resize (priv->icon_view);
 854                 }
 855         } else {
 856                 if (priv->icon_view) {
 857                         gtk_container_remove (GTK_CONTAINER (priv->swindow), priv->icon_view);
 858                         priv->icon_view = NULL;
 859                 }
 860
 861                 if (! priv->tree_view) {
 862                         ev_sidebar_init_tree_view (sidebar_thumbnails);
 863                         g_object_notify (G_OBJECT (sidebar_thumbnails), "main_widget");
 864                 }
 865         }
 866
 867         /* Connect to the signal and trigger a fake callback */
 868         g_signal_connect_swapped (priv->model, "page-changed",
 869                                   G_CALLBACK (page_changed_cb),
 870                                   sidebar_thumbnails);
 871         g_signal_connect (priv->model, "notify::rotation",
 872                           G_CALLBACK (ev_sidebar_thumbnails_rotation_changed_cb),
 873                           sidebar_thumbnails);
 874         g_signal_connect (priv->model, "notify::inverted-colors",
 875                           G_CALLBACK (ev_sidebar_thumbnails_inverted_colors_changed_cb),
 876                           sidebar_thumbnails);
 877         sidebar_thumbnails->priv->start_page = -1;
 878         sidebar_thumbnails->priv->end_page = -1;
 879         ev_sidebar_thumbnails_set_current_page (sidebar_thumbnails,
 880                                                 ev_document_model_get_page (model));
 881         adjustment_changed_cb (sidebar_thumbnails);
 882 }
 883
 884 static void
 885 ev_sidebar_thumbnails_set_model (EvSidebarPage   *sidebar_page,
 886                                  EvDocumentModel *model)
 887 {
 888         EvSidebarThumbnails *sidebar_thumbnails = EV_SIDEBAR_THUMBNAILS (sidebar_page);
 889         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 890
 891         if (priv->model == model)
 892                 return;
 893
 894         priv->model = model;
 895         g_signal_connect (model, "notify::document",
 896                           G_CALLBACK (ev_sidebar_thumbnails_document_changed_cb),
 897                           sidebar_page);
 898 }
 899
 900 static gboolean
 901 ev_sidebar_thumbnails_clear_job (GtkTreeModel *model,
 902                                  GtkTreePath *path,
 903                                  GtkTreeIter *iter,
 904                                  gpointer data)
 905 {
 906         EvJob *job;
 907
 908         gtk_tree_model_get (model, iter, COLUMN_JOB, &job, -1);
 909
 910         if (job != NULL) {
 911                 ev_job_cancel (job);
 912                 g_signal_handlers_disconnect_by_func (job, thumbnail_job_completed_callback, data);
 913                 g_object_unref (job);
 914         }
 915
 916         return FALSE;
 917 }
 918
 919 static void
 920 ev_sidebar_thumbnails_clear_model (EvSidebarThumbnails *sidebar_thumbnails)
 921 {
 922         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 923
 924         gtk_tree_model_foreach (GTK_TREE_MODEL (priv->list_store), ev_sidebar_thumbnails_clear_job, sidebar_thumbnails);
 925         gtk_list_store_clear (priv->list_store);
 926 }
 927
 928 static gboolean
 929 ev_sidebar_thumbnails_support_document (EvSidebarPage   *sidebar_page,
 930                                         EvDocument *document)
 931 {
 932         return TRUE;
 933 }
 934
 935 static const gchar*
 936 ev_sidebar_thumbnails_get_label (EvSidebarPage *sidebar_page)
 937 {
 938         return _("Thumbnails");
 939 }
 940
 941 static void
 942 ev_sidebar_thumbnails_page_iface_init (EvSidebarPageInterface *iface)
 943 {
 944         iface->support_document = ev_sidebar_thumbnails_support_document;
 945         iface->set_model = ev_sidebar_thumbnails_set_model;
 946         iface->get_label = ev_sidebar_thumbnails_get_label;
 947 }