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