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-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         EvDocumentModel *model;
  70         EvThumbsSizeCache *size_cache;
  71
  72         gint n_pages, pages_done;
  73
  74         int rotation;
  75         gboolean inverted_colors;
  76
  77         /* Visible pages */
  78         gint start_page, end_page;
  79 };
  80
  81 enum {
  82         COLUMN_PAGE_STRING,
  83         COLUMN_PIXBUF,
  84         COLUMN_THUMBNAIL_SET,
  85         COLUMN_JOB,
  86         NUM_COLUMNS
  87 };
  88
  89 enum {
  90         PROP_0,
  91         PROP_WIDGET,
  92 };
  93
  94 static void         ev_sidebar_thumbnails_clear_model      (EvSidebarThumbnails *sidebar);
  95 static gboolean     ev_sidebar_thumbnails_support_document (EvSidebarPage       *sidebar_page,
  96                                                             EvDocument          *document);
  97 static void         ev_sidebar_thumbnails_page_iface_init  (EvSidebarPageIface  *iface);
  98 static const gchar* ev_sidebar_thumbnails_get_label        (EvSidebarPage       *sidebar_page);
  99 static void         thumbnail_job_completed_callback       (EvJobThumbnail      *job,
 100                                                             EvSidebarThumbnails *sidebar_thumbnails);
 101 static void         adjustment_changed_cb                  (EvSidebarThumbnails *sidebar_thumbnails);
 102
 103 G_DEFINE_TYPE_EXTENDED (EvSidebarThumbnails,
 104                         ev_sidebar_thumbnails,
 105                         GTK_TYPE_VBOX,
 106                         0,
 107                         G_IMPLEMENT_INTERFACE (EV_TYPE_SIDEBAR_PAGE,
 108                                                ev_sidebar_thumbnails_page_iface_init))
 109
 110 #define EV_SIDEBAR_THUMBNAILS_GET_PRIVATE(object) \
 111         (G_TYPE_INSTANCE_GET_PRIVATE ((object), EV_TYPE_SIDEBAR_THUMBNAILS, EvSidebarThumbnailsPrivate));
 112
 113 /* Thumbnails dimensions cache */
 114 #define EV_THUMBNAILS_SIZE_CACHE_KEY "ev-thumbnails-size-cache"
 115
 116 static EvThumbsSizeCache *
 117 ev_thumbnails_size_cache_new (EvDocument *document)
 118 {
 119         EvThumbsSizeCache *cache;
 120         EvRenderContext *rc = NULL;
 121         gint i, n_pages;
 122         EvThumbsSize *thumb_size;
 123
 124         cache = g_new0 (EvThumbsSizeCache, 1);
 125
 126         n_pages = ev_document_get_n_pages (document);
 127
 128         /* Assume all pages are the same size until proven otherwise */
 129         cache->uniform = TRUE;
 130
 131         for (i = 0; i < n_pages; i++) {
 132                 EvPage *page;
 133                 gdouble page_width, page_height;
 134                 gint    thumb_width = 0;
 135                 gint    thumb_height = 0;
 136
 137                 page = ev_document_get_page (document, i);
 138
 139                 ev_document_get_page_size (document, i, &page_width, &page_height);
 140
 141                 if (!rc) {
 142                         rc = ev_render_context_new (page, 0, (gdouble)THUMBNAIL_WIDTH / page_width);
 143                 } else {
 144                         ev_render_context_set_page (rc, page);
 145                         ev_render_context_set_scale (rc, (gdouble)THUMBNAIL_WIDTH / page_width);
 146                 }
 147
 148                 ev_document_thumbnails_get_dimensions (EV_DOCUMENT_THUMBNAILS (document),
 149                                                        rc, &thumb_width, &thumb_height);
 150
 151                 if (i == 0) {
 152                         cache->uniform_width = thumb_width;
 153                         cache->uniform_height = thumb_height;
 154                 } else if (cache->uniform &&
 155                            (cache->uniform_width != thumb_width ||
 156                             cache->uniform_height != thumb_height)) {
 157                         /* It's a different thumbnail size.  Backfill the array. */
 158                         int j;
 159
 160                         cache->sizes = g_new0 (EvThumbsSize, n_pages);
 161
 162                         for (j = 0; j < i; j++) {
 163                                 thumb_size = &(cache->sizes[j]);
 164                                 thumb_size->width = cache->uniform_width;
 165                                 thumb_size->height = cache->uniform_height;
 166                         }
 167                         cache->uniform = FALSE;
 168                 }
 169
 170                 if (! cache->uniform) {
 171                         thumb_size = &(cache->sizes[i]);
 172
 173                         thumb_size->width = thumb_width;
 174                         thumb_size->height = thumb_height;
 175                 }
 176
 177                 g_object_unref (page);
 178         }
 179
 180         if (rc) {
 181                 g_object_unref (rc);
 182         }
 183
 184         return cache;
 185 }
 186
 187 static void
 188 ev_thumbnails_size_cache_get_size (EvThumbsSizeCache *cache,
 189                                    gint               page,
 190                                    gint               rotation,
 191                                    gint              *width,
 192                                    gint              *height)
 193 {
 194         gint w, h;
 195
 196         if (cache->uniform) {
 197                 w = cache->uniform_width;
 198                 h = cache->uniform_height;
 199         } else {
 200                 EvThumbsSize *thumb_size;
 201
 202                 thumb_size = &(cache->sizes[page]);
 203
 204                 w = thumb_size->width;
 205                 h = thumb_size->height;
 206         }
 207
 208         if (rotation == 0 || rotation == 180) {
 209                 if (width) *width = w;
 210                 if (height) *height = h;
 211         } else {
 212                 if (width) *width = h;
 213                 if (height) *height = w;
 214         }
 215 }
 216
 217 static void
 218 ev_thumbnails_size_cache_free (EvThumbsSizeCache *cache)
 219 {
 220         if (cache->sizes) {
 221                 g_free (cache->sizes);
 222                 cache->sizes = NULL;
 223         }
 224
 225         g_free (cache);
 226 }
 227
 228 static EvThumbsSizeCache *
 229 ev_thumbnails_size_cache_get (EvDocument *document)
 230 {
 231         EvThumbsSizeCache *cache;
 232
 233         cache = g_object_get_data (G_OBJECT (document), EV_THUMBNAILS_SIZE_CACHE_KEY);
 234         if (!cache) {
 235                 cache = ev_thumbnails_size_cache_new (document);
 236                 g_object_set_data_full (G_OBJECT (document),
 237                                         EV_THUMBNAILS_SIZE_CACHE_KEY,
 238                                         cache,
 239                                         (GDestroyNotify)ev_thumbnails_size_cache_free);
 240         }
 241
 242         return cache;
 243 }
 244
 245
 246 static void
 247 ev_sidebar_thumbnails_dispose (GObject *object)
 248 {
 249         EvSidebarThumbnails *sidebar_thumbnails = EV_SIDEBAR_THUMBNAILS (object);
 250
 251         if (sidebar_thumbnails->priv->loading_icons) {
 252                 g_hash_table_destroy (sidebar_thumbnails->priv->loading_icons);
 253                 sidebar_thumbnails->priv->loading_icons = NULL;
 254         }
 255
 256         if (sidebar_thumbnails->priv->list_store) {
 257                 ev_sidebar_thumbnails_clear_model (sidebar_thumbnails);
 258                 g_object_unref (sidebar_thumbnails->priv->list_store);
 259                 sidebar_thumbnails->priv->list_store = NULL;
 260         }
 261
 262         G_OBJECT_CLASS (ev_sidebar_thumbnails_parent_class)->dispose (object);
 263 }
 264
 265 static void
 266 ev_sidebar_thumbnails_get_property (GObject    *object,
 267                                     guint       prop_id,
 268                                     GValue     *value,
 269                                     GParamSpec *pspec)
 270 {
 271         EvSidebarThumbnails *sidebar = EV_SIDEBAR_THUMBNAILS (object);
 272
 273         switch (prop_id) {
 274         case PROP_WIDGET:
 275                 if (sidebar->priv->tree_view)
 276                         g_value_set_object (value, sidebar->priv->tree_view);
 277                 else
 278                         g_value_set_object (value, sidebar->priv->icon_view);
 279                 break;
 280         default:
 281                 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 282                 break;
 283         }
 284 }
 285
 286 static void
 287 ev_sidebar_thumbnails_map (GtkWidget *widget)
 288 {
 289         EvSidebarThumbnails *sidebar;
 290
 291         sidebar = EV_SIDEBAR_THUMBNAILS (widget);
 292
 293         GTK_WIDGET_CLASS (ev_sidebar_thumbnails_parent_class)->map (widget);
 294
 295         adjustment_changed_cb (sidebar);
 296 }
 297
 298 static void
 299 ev_sidebar_thumbnails_class_init (EvSidebarThumbnailsClass *ev_sidebar_thumbnails_class)
 300 {
 301         GObjectClass *g_object_class;
 302         GtkObjectClass *gtk_object_class;
 303         GtkWidgetClass *widget_class;
 304
 305         g_object_class = G_OBJECT_CLASS (ev_sidebar_thumbnails_class);
 306         gtk_object_class = GTK_OBJECT_CLASS (ev_sidebar_thumbnails_class);
 307         widget_class = GTK_WIDGET_CLASS (ev_sidebar_thumbnails_class);
 308
 309         g_object_class->dispose = ev_sidebar_thumbnails_dispose;
 310         g_object_class->get_property = ev_sidebar_thumbnails_get_property;
 311         widget_class->map = ev_sidebar_thumbnails_map;
 312
 313         g_object_class_override_property (g_object_class,
 314                                           PROP_WIDGET,
 315                                           "main-widget");
 316
 317         g_type_class_add_private (g_object_class, sizeof (EvSidebarThumbnailsPrivate));
 318 }
 319
 320 GtkWidget *
 321 ev_sidebar_thumbnails_new (void)
 322 {
 323         GtkWidget *ev_sidebar_thumbnails;
 324
 325         ev_sidebar_thumbnails = g_object_new (EV_TYPE_SIDEBAR_THUMBNAILS, NULL);
 326
 327         return ev_sidebar_thumbnails;
 328 }
 329
 330 static GdkPixbuf *
 331 ev_sidebar_thumbnails_get_loading_icon (EvSidebarThumbnails *sidebar_thumbnails,
 332                                         gint                 width,
 333                                         gint                 height)
 334 {
 335         GdkPixbuf *icon;
 336         gchar     *key;
 337
 338         key = g_strdup_printf ("%dx%d", width, height);
 339         icon = g_hash_table_lookup (sidebar_thumbnails->priv->loading_icons, key);
 340         if (!icon) {
 341                 icon = ev_document_misc_get_thumbnail_frame (width, height, NULL);
 342                 g_hash_table_insert (sidebar_thumbnails->priv->loading_icons,
 343                                      key, icon);
 344         } else {
 345                 g_free (key);
 346         }
 347
 348         return icon;
 349 }
 350
 351 static void
 352 clear_range (EvSidebarThumbnails *sidebar_thumbnails,
 353              gint                 start_page,
 354              gint                 end_page)
 355 {
 356         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 357         GtkTreePath *path;
 358         GtkTreeIter iter;
 359         gboolean result;
 360         gint prev_width = -1;
 361         gint prev_height = -1;
 362
 363         g_assert (start_page <= end_page);
 364
 365         path = gtk_tree_path_new_from_indices (start_page, -1);
 366         for (result = gtk_tree_model_get_iter (GTK_TREE_MODEL (priv->list_store), &iter, path);
 367              result && start_page <= end_page;
 368              result = gtk_tree_model_iter_next (GTK_TREE_MODEL (priv->list_store), &iter), start_page ++) {
 369                 EvJobThumbnail *job;
 370                 GdkPixbuf *loading_icon = NULL;
 371                 gint width, height;
 372
 373                 gtk_tree_model_get (GTK_TREE_MODEL (priv->list_store),
 374                                     &iter,
 375                                     COLUMN_JOB, &job,
 376                                     -1);
 377
 378                 if (job) {
 379                         g_signal_handlers_disconnect_by_func (job, thumbnail_job_completed_callback, sidebar_thumbnails);
 380                         ev_job_cancel (EV_JOB (job));
 381                         g_object_unref (job);
 382                 }
 383
 384                 ev_thumbnails_size_cache_get_size (priv->size_cache, start_page,
 385                                                   priv->rotation,
 386                                                   &width, &height);
 387                 if (!loading_icon || (width != prev_width && height != prev_height)) {
 388                         loading_icon =
 389                                 ev_sidebar_thumbnails_get_loading_icon (sidebar_thumbnails,
 390                                                                         width, height);
 391                 }
 392
 393                 prev_width = width;
 394                 prev_height = height;
 395
 396                 gtk_list_store_set (priv->list_store, &iter,
 397                                     COLUMN_JOB, NULL,
 398                                     COLUMN_THUMBNAIL_SET, FALSE,
 399                                     COLUMN_PIXBUF, loading_icon,
 400                                     -1);
 401         }
 402         gtk_tree_path_free (path);
 403 }
 404
 405 static gdouble
 406 get_scale_for_page (EvSidebarThumbnails *sidebar_thumbnails,
 407                     gint                 page)
 408 {
 409         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 410         gdouble width;
 411
 412         ev_document_get_page_size (priv->document, page, &width, NULL);
 413
 414         return (gdouble)THUMBNAIL_WIDTH / width;
 415 }
 416
 417 static void
 418 add_range (EvSidebarThumbnails *sidebar_thumbnails,
 419            gint                 start_page,
 420            gint                 end_page)
 421 {
 422         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 423         GtkTreePath *path;
 424         GtkTreeIter iter;
 425         gboolean result;
 426         gint page = start_page;
 427
 428         g_assert (start_page <= end_page);
 429
 430         path = gtk_tree_path_new_from_indices (start_page, -1);
 431         for (result = gtk_tree_model_get_iter (GTK_TREE_MODEL (priv->list_store), &iter, path);
 432              result && page <= end_page;
 433              result = gtk_tree_model_iter_next (GTK_TREE_MODEL (priv->list_store), &iter), page ++) {
 434                 EvJob *job;
 435                 gboolean thumbnail_set;
 436
 437                 gtk_tree_model_get (GTK_TREE_MODEL (priv->list_store), &iter,
 438                                     COLUMN_JOB, &job,
 439                                     COLUMN_THUMBNAIL_SET, &thumbnail_set,
 440                                     -1);
 441
 442                 if (job == NULL && !thumbnail_set) {
 443                         job = ev_job_thumbnail_new (priv->document,
 444                                                     page, priv->rotation,
 445                                                     get_scale_for_page (sidebar_thumbnails, page));
 446                         ev_job_scheduler_push_job (EV_JOB (job), EV_JOB_PRIORITY_HIGH);
 447
 448                         g_object_set_data_full (G_OBJECT (job), "tree_iter",
 449                                                 gtk_tree_iter_copy (&iter),
 450                                                 (GDestroyNotify) gtk_tree_iter_free);
 451                         g_signal_connect (job, "finished",
 452                                           G_CALLBACK (thumbnail_job_completed_callback),
 453                                           sidebar_thumbnails);
 454                         gtk_list_store_set (priv->list_store, &iter,
 455                                             COLUMN_JOB, job,
 456                                             -1);
 457
 458                         /* The queue and the list own a ref to the job now */
 459                         g_object_unref (job);
 460                 } else if (job) {
 461                         g_object_unref (job);
 462                 }
 463         }
 464         gtk_tree_path_free (path);
 465 }
 466
 467 /* This modifies start */
 468 static void
 469 update_visible_range (EvSidebarThumbnails *sidebar_thumbnails,
 470                       gint                 start_page,
 471                       gint                 end_page)
 472 {
 473         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 474         int old_start_page, old_end_page;
 475
 476         old_start_page = priv->start_page;
 477         old_end_page = priv->end_page;
 478
 479         if (start_page == old_start_page &&
 480             end_page == old_end_page)
 481                 return;
 482
 483         /* Clear the areas we no longer display */
 484         if (old_start_page >= 0 && old_start_page < start_page)
 485                 clear_range (sidebar_thumbnails, old_start_page, MIN (start_page - 1, old_end_page));
 486
 487         if (old_end_page > 0 && old_end_page > end_page)
 488                 clear_range (sidebar_thumbnails, MAX (end_page + 1, old_start_page), old_end_page);
 489
 490         add_range (sidebar_thumbnails, start_page, end_page);
 491
 492         priv->start_page = start_page;
 493         priv->end_page = end_page;
 494 }
 495
 496 static void
 497 adjustment_changed_cb (EvSidebarThumbnails *sidebar_thumbnails)
 498 {
 499         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 500         GtkTreePath *path = NULL;
 501         GtkTreePath *path2 = NULL;
 502         gdouble page_size;
 503         gdouble value;
 504         gint wy1;
 505         gint wy2;
 506
 507         /* Widget is not currently visible */
 508         if (!gtk_widget_get_mapped (GTK_WIDGET (sidebar_thumbnails)))
 509                 return;
 510
 511         page_size = gtk_adjustment_get_page_size (priv->vadjustment);
 512
 513         if (page_size == 0)
 514                 return;
 515
 516         value = gtk_adjustment_get_value (priv->vadjustment);
 517
 518         if (priv->tree_view) {
 519                 if (! gtk_widget_get_realized (priv->tree_view))
 520                         return;
 521
 522                 gtk_tree_view_convert_tree_to_bin_window_coords (GTK_TREE_VIEW (priv->tree_view),
 523                                                                  0, (int) value,
 524                                                                  NULL, &wy1);
 525                 gtk_tree_view_convert_tree_to_bin_window_coords (GTK_TREE_VIEW (priv->tree_view),
 526                                                                  0, (int) (value + page_size),
 527                                                                  NULL, &wy2);
 528                 gtk_tree_view_get_path_at_pos (GTK_TREE_VIEW (priv->tree_view),
 529                                                1, wy1 + 1, &path,
 530                                                NULL, NULL, NULL);
 531                 gtk_tree_view_get_path_at_pos (GTK_TREE_VIEW (priv->tree_view),
 532                                                1, wy2 -1, &path2,
 533                                                NULL, NULL, NULL);
 534         } else if (priv->icon_view) {
 535                 if (! gtk_widget_get_realized (priv->icon_view))
 536                         return;
 537                 if (! gtk_icon_view_get_visible_range (GTK_ICON_VIEW (priv->icon_view), &path, &path2))
 538                         return;
 539         } else {
 540                 return;
 541         }
 542
 543         if (path && path2) {
 544                 update_visible_range (sidebar_thumbnails,
 545                                       gtk_tree_path_get_indices (path)[0],
 546                                       gtk_tree_path_get_indices (path2)[0]);
 547         }
 548
 549         gtk_tree_path_free (path);
 550         gtk_tree_path_free (path2);
 551 }
 552
 553 static void
 554 ev_sidebar_thumbnails_fill_model (EvSidebarThumbnails *sidebar_thumbnails)
 555 {
 556         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 557         GtkTreeIter iter;
 558         int i;
 559         gint prev_width = -1;
 560         gint prev_height = -1;
 561
 562         for (i = 0; i < sidebar_thumbnails->priv->n_pages; i++) {
 563                 gchar     *page_label;
 564                 gchar     *page_string;
 565                 GdkPixbuf *loading_icon = NULL;
 566                 gint       width, height;
 567
 568                 page_label = ev_document_get_page_label (priv->document, i);
 569                 page_string = g_markup_printf_escaped ("<i>%s</i>", page_label);
 570                 ev_thumbnails_size_cache_get_size (sidebar_thumbnails->priv->size_cache, i,
 571                                                   sidebar_thumbnails->priv->rotation,
 572                                                   &width, &height);
 573                 if (!loading_icon || (width != prev_width && height != prev_height)) {
 574                         loading_icon =
 575                                 ev_sidebar_thumbnails_get_loading_icon (sidebar_thumbnails,
 576                                                                         width, height);
 577                 }
 578
 579                 prev_width = width;
 580                 prev_height = height;
 581
 582                 gtk_list_store_append (priv->list_store, &iter);
 583                 gtk_list_store_set (priv->list_store, &iter,
 584                                     COLUMN_PAGE_STRING, page_string,
 585                                     COLUMN_PIXBUF, loading_icon,
 586                                     COLUMN_THUMBNAIL_SET, FALSE,
 587                                     -1);
 588                 g_free (page_label);
 589                 g_free (page_string);
 590         }
 591 }
 592
 593 static void
 594 ev_sidebar_tree_selection_changed (GtkTreeSelection *selection,
 595                                    EvSidebarThumbnails *ev_sidebar_thumbnails)
 596 {
 597         EvSidebarThumbnailsPrivate *priv = ev_sidebar_thumbnails->priv;
 598         GtkTreePath *path;
 599         GtkTreeIter iter;
 600         int page;
 601
 602         if (!gtk_tree_selection_get_selected (selection, NULL, &iter))
 603                 return;
 604
 605         path = gtk_tree_model_get_path (GTK_TREE_MODEL (priv->list_store),
 606                                         &iter);
 607         page = gtk_tree_path_get_indices (path)[0];
 608         gtk_tree_path_free (path);
 609
 610         ev_document_model_set_page (priv->model, page);
 611 }
 612
 613 static void
 614 ev_sidebar_icon_selection_changed (GtkIconView         *icon_view,
 615                                    EvSidebarThumbnails *ev_sidebar_thumbnails)
 616 {
 617         EvSidebarThumbnailsPrivate *priv = ev_sidebar_thumbnails->priv;
 618         GtkTreePath *path;
 619         GList *selected;
 620         int page;
 621
 622         selected = gtk_icon_view_get_selected_items (icon_view);
 623         if (selected == NULL)
 624                 return;
 625
 626         /* We don't handle or expect multiple selection. */
 627         g_assert (selected->next == NULL);
 628
 629         path = selected->data;
 630         page = gtk_tree_path_get_indices (path)[0];
 631
 632         gtk_tree_path_free (path);
 633         g_list_free (selected);
 634
 635         ev_document_model_set_page (priv->model, page);
 636 }
 637
 638 static void
 639 ev_sidebar_init_tree_view (EvSidebarThumbnails *ev_sidebar_thumbnails)
 640 {
 641         EvSidebarThumbnailsPrivate *priv;
 642         GtkTreeSelection *selection;
 643         GtkCellRenderer *renderer;
 644
 645         priv = ev_sidebar_thumbnails->priv;
 646         priv->tree_view = gtk_tree_view_new_with_model (GTK_TREE_MODEL (priv->list_store));
 647
 648         selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (priv->tree_view));
 649         g_signal_connect (selection, "changed",
 650                           G_CALLBACK (ev_sidebar_tree_selection_changed), ev_sidebar_thumbnails);
 651         gtk_tree_view_set_headers_visible (GTK_TREE_VIEW (priv->tree_view), FALSE);
 652         renderer = g_object_new (GTK_TYPE_CELL_RENDERER_PIXBUF,
 653                                  "xpad", 2,
 654                                  "ypad", 2,
 655                                  NULL);
 656         gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (priv->tree_view), -1,
 657                                                      NULL, renderer,
 658                                                      "pixbuf", 1,
 659                                                      NULL);
 660         gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (priv->tree_view), -1,
 661                                                      NULL, gtk_cell_renderer_text_new (),
 662                                                      "markup", 0, NULL);
 663         gtk_container_add (GTK_CONTAINER (priv->swindow), priv->tree_view);
 664         gtk_widget_show (priv->tree_view);
 665 }
 666
 667 static void
 668 ev_sidebar_init_icon_view (EvSidebarThumbnails *ev_sidebar_thumbnails)
 669 {
 670         EvSidebarThumbnailsPrivate *priv;
 671
 672         priv = ev_sidebar_thumbnails->priv;
 673
 674         priv->icon_view = gtk_icon_view_new_with_model (GTK_TREE_MODEL (priv->list_store));
 675         gtk_icon_view_set_markup_column (GTK_ICON_VIEW (priv->icon_view), 0);
 676         gtk_icon_view_set_pixbuf_column (GTK_ICON_VIEW (priv->icon_view), 1);
 677         g_signal_connect (priv->icon_view, "selection-changed",
 678                           G_CALLBACK (ev_sidebar_icon_selection_changed), ev_sidebar_thumbnails);
 679
 680         gtk_container_add (GTK_CONTAINER (priv->swindow), priv->icon_view);
 681         gtk_widget_show (priv->icon_view);
 682 }
 683
 684 static gboolean
 685 ev_sidebar_thumbnails_use_icon_view (EvSidebarThumbnails *sidebar_thumbnails)
 686 {
 687         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 688
 689         return (ev_document_get_n_pages (priv->document) <= MAX_ICON_VIEW_PAGE_COUNT);
 690 }
 691
 692 static void
 693 ev_sidebar_thumbnails_init (EvSidebarThumbnails *ev_sidebar_thumbnails)
 694 {
 695         EvSidebarThumbnailsPrivate *priv;
 696
 697         priv = ev_sidebar_thumbnails->priv = EV_SIDEBAR_THUMBNAILS_GET_PRIVATE (ev_sidebar_thumbnails);
 698
 699         priv->list_store = gtk_list_store_new (NUM_COLUMNS,
 700                                                G_TYPE_STRING,
 701                                                GDK_TYPE_PIXBUF,
 702                                                G_TYPE_BOOLEAN,
 703                                                EV_TYPE_JOB_THUMBNAIL);
 704
 705         priv->swindow = gtk_scrolled_window_new (NULL, NULL);
 706
 707         /* We actually don't want GTK_POLICY_AUTOMATIC for horizontal scrollbar here
 708          * it's just a workaround for bug #449462
 709          */
 710         gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (priv->swindow),
 711                                         GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);
 712         gtk_scrolled_window_set_shadow_type (GTK_SCROLLED_WINDOW (priv->swindow),
 713                                              GTK_SHADOW_IN);
 714         priv->vadjustment = gtk_scrolled_window_get_vadjustment (GTK_SCROLLED_WINDOW (priv->swindow));
 715         g_signal_connect_data (priv->vadjustment, "value-changed",
 716                                G_CALLBACK (adjustment_changed_cb),
 717                                ev_sidebar_thumbnails, NULL,
 718                                G_CONNECT_SWAPPED | G_CONNECT_AFTER);
 719         g_signal_connect_swapped (priv->swindow, "size-allocate",
 720                                   G_CALLBACK (adjustment_changed_cb),
 721                                   ev_sidebar_thumbnails);
 722         gtk_box_pack_start (GTK_BOX (ev_sidebar_thumbnails), priv->swindow, TRUE, TRUE, 0);
 723
 724         /* Put it all together */
 725         gtk_widget_show_all (priv->swindow);
 726 }
 727
 728 static void
 729 ev_sidebar_thumbnails_set_current_page (EvSidebarThumbnails *sidebar,
 730                                         gint                 page)
 731 {
 732         GtkTreeView *tree_view;
 733         GtkTreePath *path;
 734
 735         path = gtk_tree_path_new_from_indices (page, -1);
 736
 737         if (sidebar->priv->tree_view) {
 738                 tree_view = GTK_TREE_VIEW (sidebar->priv->tree_view);
 739                 gtk_tree_view_set_cursor (tree_view, path, NULL, FALSE);
 740                 gtk_tree_view_scroll_to_cell (tree_view, path, NULL, FALSE, 0.0, 0.0);
 741         } else if (sidebar->priv->icon_view) {
 742
 743                 g_signal_handlers_block_by_func
 744                         (sidebar->priv->icon_view,
 745                          G_CALLBACK (ev_sidebar_icon_selection_changed), sidebar);
 746
 747                 gtk_icon_view_select_path (GTK_ICON_VIEW (sidebar->priv->icon_view), path);
 748
 749                 g_signal_handlers_unblock_by_func
 750                         (sidebar->priv->icon_view,
 751                          G_CALLBACK (ev_sidebar_icon_selection_changed), sidebar);
 752
 753                 gtk_icon_view_set_cursor (GTK_ICON_VIEW (sidebar->priv->icon_view), path, NULL, FALSE);
 754         }
 755
 756         gtk_tree_path_free (path);
 757 }
 758
 759 static void
 760 page_changed_cb (EvSidebarThumbnails *sidebar,
 761                  gint                 old_page,
 762                  gint                 new_page)
 763 {
 764         ev_sidebar_thumbnails_set_current_page (sidebar, new_page);
 765 }
 766
 767 static gboolean
 768 refresh (EvSidebarThumbnails *sidebar_thumbnails)
 769 {
 770         adjustment_changed_cb (sidebar_thumbnails);
 771         return FALSE;
 772 }
 773
 774 static void
 775 ev_sidebar_thumbnails_reload (EvSidebarThumbnails *sidebar_thumbnails)
 776 {
 777         EvDocumentModel *model;
 778
 779         if (sidebar_thumbnails->priv->loading_icons)
 780                 g_hash_table_remove_all (sidebar_thumbnails->priv->loading_icons);
 781
 782         if (sidebar_thumbnails->priv->document == NULL ||
 783             sidebar_thumbnails->priv->n_pages <= 0)
 784                 return;
 785
 786         model = sidebar_thumbnails->priv->model;
 787
 788         ev_sidebar_thumbnails_clear_model (sidebar_thumbnails);
 789         ev_sidebar_thumbnails_fill_model (sidebar_thumbnails);
 790
 791         /* Trigger a redraw */
 792         sidebar_thumbnails->priv->start_page = -1;
 793         sidebar_thumbnails->priv->end_page = -1;
 794         ev_sidebar_thumbnails_set_current_page (sidebar_thumbnails,
 795                                                 ev_document_model_get_page (model));
 796         g_idle_add ((GSourceFunc)refresh, sidebar_thumbnails);
 797 }
 798
 799 static void
 800 ev_sidebar_thumbnails_rotation_changed_cb (EvDocumentModel     *model,
 801                                            GParamSpec          *pspec,
 802                                            EvSidebarThumbnails *sidebar_thumbnails)
 803 {
 804         gint rotation = ev_document_model_get_rotation (model);
 805
 806         sidebar_thumbnails->priv->rotation = rotation;
 807         ev_sidebar_thumbnails_reload (sidebar_thumbnails);
 808 }
 809
 810 static void
 811 ev_sidebar_thumbnails_inverted_colors_changed_cb (EvDocumentModel     *model,
 812                                                   GParamSpec          *pspec,
 813                                                   EvSidebarThumbnails *sidebar_thumbnails)
 814 {
 815         gboolean inverted_colors = ev_document_model_get_inverted_colors (model);
 816
 817         sidebar_thumbnails->priv->inverted_colors = inverted_colors;
 818         ev_sidebar_thumbnails_reload (sidebar_thumbnails);
 819 }
 820
 821 static void
 822 thumbnail_job_completed_callback (EvJobThumbnail      *job,
 823                                   EvSidebarThumbnails *sidebar_thumbnails)
 824 {
 825         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 826         GtkTreeIter *iter;
 827
 828         iter = (GtkTreeIter *) g_object_get_data (G_OBJECT (job), "tree_iter");
 829         if (priv->inverted_colors)
 830                 ev_document_misc_invert_pixbuf (job->thumbnail);
 831         gtk_list_store_set (priv->list_store,
 832                             iter,
 833                             COLUMN_PIXBUF, job->thumbnail,
 834                             COLUMN_THUMBNAIL_SET, TRUE,
 835                             COLUMN_JOB, NULL,
 836                             -1);
 837 }
 838
 839 static void
 840 ev_sidebar_thumbnails_document_changed_cb (EvDocumentModel     *model,
 841                                            GParamSpec          *pspec,
 842                                            EvSidebarThumbnails *sidebar_thumbnails)
 843 {
 844         EvDocument *document = ev_document_model_get_document (model);
 845         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 846
 847         if (!EV_IS_DOCUMENT_THUMBNAILS (document) ||
 848             ev_document_get_n_pages (document) <= 0 ||
 849             !ev_document_check_dimensions (document)) {
 850                 return;
 851         }
 852
 853         priv->size_cache = ev_thumbnails_size_cache_get (document);
 854         priv->document = document;
 855         priv->n_pages = ev_document_get_n_pages (document);
 856         priv->rotation = ev_document_model_get_rotation (model);
 857         priv->inverted_colors = ev_document_model_get_inverted_colors (model);
 858         priv->loading_icons = g_hash_table_new_full (g_str_hash,
 859                                                      g_str_equal,
 860                                                      (GDestroyNotify)g_free,
 861                                                      (GDestroyNotify)g_object_unref);
 862
 863         ev_sidebar_thumbnails_clear_model (sidebar_thumbnails);
 864         ev_sidebar_thumbnails_fill_model (sidebar_thumbnails);
 865
 866         /* Create the view widget, and remove the old one, if needed */
 867         if (ev_sidebar_thumbnails_use_icon_view (sidebar_thumbnails)) {
 868                 if (priv->tree_view) {
 869                         gtk_container_remove (GTK_CONTAINER (priv->swindow), priv->tree_view);
 870                         priv->tree_view = NULL;
 871                 }
 872
 873                 if (! priv->icon_view) {
 874                         ev_sidebar_init_icon_view (sidebar_thumbnails);
 875                         g_object_notify (G_OBJECT (sidebar_thumbnails), "main_widget");
 876                 } else {
 877                         gtk_widget_queue_resize (priv->icon_view);
 878                 }
 879         } else {
 880                 if (priv->icon_view) {
 881                         gtk_container_remove (GTK_CONTAINER (priv->swindow), priv->icon_view);
 882                         priv->icon_view = NULL;
 883                 }
 884
 885                 if (! priv->tree_view) {
 886                         ev_sidebar_init_tree_view (sidebar_thumbnails);
 887                         g_object_notify (G_OBJECT (sidebar_thumbnails), "main_widget");
 888                 }
 889         }
 890
 891         /* Connect to the signal and trigger a fake callback */
 892         g_signal_connect_swapped (priv->model, "page-changed",
 893                                   G_CALLBACK (page_changed_cb),
 894                                   sidebar_thumbnails);
 895         g_signal_connect (priv->model, "notify::rotation",
 896                           G_CALLBACK (ev_sidebar_thumbnails_rotation_changed_cb),
 897                           sidebar_thumbnails);
 898         g_signal_connect (priv->model, "notify::inverted-colors",
 899                           G_CALLBACK (ev_sidebar_thumbnails_inverted_colors_changed_cb),
 900                           sidebar_thumbnails);
 901         sidebar_thumbnails->priv->start_page = -1;
 902         sidebar_thumbnails->priv->end_page = -1;
 903         ev_sidebar_thumbnails_set_current_page (sidebar_thumbnails,
 904                                                 ev_document_model_get_page (model));
 905         adjustment_changed_cb (sidebar_thumbnails);
 906 }
 907
 908 static void
 909 ev_sidebar_thumbnails_set_model (EvSidebarPage   *sidebar_page,
 910                                  EvDocumentModel *model)
 911 {
 912         EvSidebarThumbnails *sidebar_thumbnails = EV_SIDEBAR_THUMBNAILS (sidebar_page);
 913         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 914
 915         if (priv->model == model)
 916                 return;
 917
 918         priv->model = model;
 919         g_signal_connect (model, "notify::document",
 920                           G_CALLBACK (ev_sidebar_thumbnails_document_changed_cb),
 921                           sidebar_page);
 922 }
 923
 924 static gboolean
 925 ev_sidebar_thumbnails_clear_job (GtkTreeModel *model,
 926                                  GtkTreePath *path,
 927                                  GtkTreeIter *iter,
 928                                  gpointer data)
 929 {
 930         EvJob *job;
 931
 932         gtk_tree_model_get (model, iter, COLUMN_JOB, &job, -1);
 933
 934         if (job != NULL) {
 935                 ev_job_cancel (job);
 936                 g_signal_handlers_disconnect_by_func (job, thumbnail_job_completed_callback, data);
 937                 g_object_unref (job);
 938         }
 939
 940         return FALSE;
 941 }
 942
 943 static void
 944 ev_sidebar_thumbnails_clear_model (EvSidebarThumbnails *sidebar_thumbnails)
 945 {
 946         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 947
 948         gtk_tree_model_foreach (GTK_TREE_MODEL (priv->list_store), ev_sidebar_thumbnails_clear_job, sidebar_thumbnails);
 949         gtk_list_store_clear (priv->list_store);
 950 }
 951
 952 static gboolean
 953 ev_sidebar_thumbnails_support_document (EvSidebarPage   *sidebar_page,
 954                                         EvDocument *document)
 955 {
 956         return (EV_IS_DOCUMENT_THUMBNAILS (document));
 957 }
 958
 959 static const gchar*
 960 ev_sidebar_thumbnails_get_label (EvSidebarPage *sidebar_page)
 961 {
 962         return _("Thumbnails");
 963 }
 964
 965 static void
 966 ev_sidebar_thumbnails_page_iface_init (EvSidebarPageIface *iface)
 967 {
 968         iface->support_document = ev_sidebar_thumbnails_support_document;
 969         iface->set_model = ev_sidebar_thumbnails_set_model;
 970         iface->get_label = ev_sidebar_thumbnails_get_label;
 971 }