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  (EvSidebarPageInterface  *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 void
 117 get_thumbnail_size_for_page (EvDocument *document,
 118                              guint       page,
 119                              gint       *width,
 120                              gint       *height)
 121 {
 122         gdouble scale;
 123         gdouble w, h;
 124
 125         ev_document_get_page_size (document, page, &w, &h);
 126         scale = (gdouble)THUMBNAIL_WIDTH / w;
 127
 128         *width = MAX ((gint)(w * scale + 0.5), 1);
 129         *height = MAX ((gint)(h * scale + 0.5), 1);
 130 }
 131
 132 static EvThumbsSizeCache *
 133 ev_thumbnails_size_cache_new (EvDocument *document)
 134 {
 135         EvThumbsSizeCache *cache;
 136         gint               i, n_pages;
 137         EvThumbsSize      *thumb_size;
 138
 139         cache = g_new0 (EvThumbsSizeCache, 1);
 140
 141         if (ev_document_is_page_size_uniform (document)) {
 142                 cache->uniform = TRUE;
 143                 get_thumbnail_size_for_page (document, 0,
 144                                              &cache->uniform_width,
 145                                              &cache->uniform_height);
 146                 return cache;
 147         }
 148
 149         n_pages = ev_document_get_n_pages (document);
 150         cache->sizes = g_new0 (EvThumbsSize, n_pages);
 151
 152         for (i = 0; i < n_pages; i++) {
 153                 thumb_size = &(cache->sizes[i]);
 154                 get_thumbnail_size_for_page (document, i,
 155                                              &thumb_size->width,
 156                                              &thumb_size->height);
 157         }
 158
 159         return cache;
 160 }
 161
 162 static void
 163 ev_thumbnails_size_cache_get_size (EvThumbsSizeCache *cache,
 164                                    gint               page,
 165                                    gint               rotation,
 166                                    gint              *width,
 167                                    gint              *height)
 168 {
 169         gint w, h;
 170
 171         if (cache->uniform) {
 172                 w = cache->uniform_width;
 173                 h = cache->uniform_height;
 174         } else {
 175                 EvThumbsSize *thumb_size;
 176
 177                 thumb_size = &(cache->sizes[page]);
 178
 179                 w = thumb_size->width;
 180                 h = thumb_size->height;
 181         }
 182
 183         if (rotation == 0 || rotation == 180) {
 184                 if (width) *width = w;
 185                 if (height) *height = h;
 186         } else {
 187                 if (width) *width = h;
 188                 if (height) *height = w;
 189         }
 190 }
 191
 192 static void
 193 ev_thumbnails_size_cache_free (EvThumbsSizeCache *cache)
 194 {
 195         if (cache->sizes) {
 196                 g_free (cache->sizes);
 197                 cache->sizes = NULL;
 198         }
 199
 200         g_free (cache);
 201 }
 202
 203 static EvThumbsSizeCache *
 204 ev_thumbnails_size_cache_get (EvDocument *document)
 205 {
 206         EvThumbsSizeCache *cache;
 207
 208         cache = g_object_get_data (G_OBJECT (document), EV_THUMBNAILS_SIZE_CACHE_KEY);
 209         if (!cache) {
 210                 cache = ev_thumbnails_size_cache_new (document);
 211                 g_object_set_data_full (G_OBJECT (document),
 212                                         EV_THUMBNAILS_SIZE_CACHE_KEY,
 213                                         cache,
 214                                         (GDestroyNotify)ev_thumbnails_size_cache_free);
 215         }
 216
 217         return cache;
 218 }
 219
 220
 221 static void
 222 ev_sidebar_thumbnails_dispose (GObject *object)
 223 {
 224         EvSidebarThumbnails *sidebar_thumbnails = EV_SIDEBAR_THUMBNAILS (object);
 225
 226         if (sidebar_thumbnails->priv->loading_icons) {
 227                 g_hash_table_destroy (sidebar_thumbnails->priv->loading_icons);
 228                 sidebar_thumbnails->priv->loading_icons = NULL;
 229         }
 230
 231         if (sidebar_thumbnails->priv->list_store) {
 232                 ev_sidebar_thumbnails_clear_model (sidebar_thumbnails);
 233                 g_object_unref (sidebar_thumbnails->priv->list_store);
 234                 sidebar_thumbnails->priv->list_store = NULL;
 235         }
 236
 237         G_OBJECT_CLASS (ev_sidebar_thumbnails_parent_class)->dispose (object);
 238 }
 239
 240 static void
 241 ev_sidebar_thumbnails_get_property (GObject    *object,
 242                                     guint       prop_id,
 243                                     GValue     *value,
 244                                     GParamSpec *pspec)
 245 {
 246         EvSidebarThumbnails *sidebar = EV_SIDEBAR_THUMBNAILS (object);
 247
 248         switch (prop_id) {
 249         case PROP_WIDGET:
 250                 if (sidebar->priv->tree_view)
 251                         g_value_set_object (value, sidebar->priv->tree_view);
 252                 else
 253                         g_value_set_object (value, sidebar->priv->icon_view);
 254                 break;
 255         default:
 256                 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 257                 break;
 258         }
 259 }
 260
 261 static void
 262 ev_sidebar_thumbnails_map (GtkWidget *widget)
 263 {
 264         EvSidebarThumbnails *sidebar;
 265
 266         sidebar = EV_SIDEBAR_THUMBNAILS (widget);
 267
 268         GTK_WIDGET_CLASS (ev_sidebar_thumbnails_parent_class)->map (widget);
 269
 270         adjustment_changed_cb (sidebar);
 271 }
 272
 273 static void
 274 ev_sidebar_thumbnails_class_init (EvSidebarThumbnailsClass *ev_sidebar_thumbnails_class)
 275 {
 276         GObjectClass *g_object_class;
 277         GtkObjectClass *gtk_object_class;
 278         GtkWidgetClass *widget_class;
 279
 280         g_object_class = G_OBJECT_CLASS (ev_sidebar_thumbnails_class);
 281         gtk_object_class = GTK_OBJECT_CLASS (ev_sidebar_thumbnails_class);
 282         widget_class = GTK_WIDGET_CLASS (ev_sidebar_thumbnails_class);
 283
 284         g_object_class->dispose = ev_sidebar_thumbnails_dispose;
 285         g_object_class->get_property = ev_sidebar_thumbnails_get_property;
 286         widget_class->map = ev_sidebar_thumbnails_map;
 287
 288         g_object_class_override_property (g_object_class,
 289                                           PROP_WIDGET,
 290                                           "main-widget");
 291
 292         g_type_class_add_private (g_object_class, sizeof (EvSidebarThumbnailsPrivate));
 293 }
 294
 295 GtkWidget *
 296 ev_sidebar_thumbnails_new (void)
 297 {
 298         GtkWidget *ev_sidebar_thumbnails;
 299
 300         ev_sidebar_thumbnails = g_object_new (EV_TYPE_SIDEBAR_THUMBNAILS, NULL);
 301
 302         return ev_sidebar_thumbnails;
 303 }
 304
 305 static GdkPixbuf *
 306 ev_sidebar_thumbnails_get_loading_icon (EvSidebarThumbnails *sidebar_thumbnails,
 307                                         gint                 width,
 308                                         gint                 height)
 309 {
 310         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 311         GdkPixbuf *icon;
 312         gchar     *key;
 313
 314         key = g_strdup_printf ("%dx%d", width, height);
 315         icon = g_hash_table_lookup (priv->loading_icons, key);
 316         if (!icon) {
 317                 gboolean inverted_colors;
 318
 319                 inverted_colors = ev_document_model_get_inverted_colors (priv->model);
 320                 icon = ev_document_misc_get_loading_thumbnail (width, height, inverted_colors);
 321                 g_hash_table_insert (priv->loading_icons, key, icon);
 322         } else {
 323                 g_free (key);
 324         }
 325
 326         return icon;
 327 }
 328
 329 static void
 330 clear_range (EvSidebarThumbnails *sidebar_thumbnails,
 331              gint                 start_page,
 332              gint                 end_page)
 333 {
 334         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 335         GtkTreePath *path;
 336         GtkTreeIter iter;
 337         gboolean result;
 338         gint prev_width = -1;
 339         gint prev_height = -1;
 340
 341         g_assert (start_page <= end_page);
 342
 343         path = gtk_tree_path_new_from_indices (start_page, -1);
 344         for (result = gtk_tree_model_get_iter (GTK_TREE_MODEL (priv->list_store), &iter, path);
 345              result && start_page <= end_page;
 346              result = gtk_tree_model_iter_next (GTK_TREE_MODEL (priv->list_store), &iter), start_page ++) {
 347                 EvJobThumbnail *job;
 348                 GdkPixbuf *loading_icon = NULL;
 349                 gint width, height;
 350
 351                 gtk_tree_model_get (GTK_TREE_MODEL (priv->list_store),
 352                                     &iter,
 353                                     COLUMN_JOB, &job,
 354                                     -1);
 355
 356                 if (job) {
 357                         g_signal_handlers_disconnect_by_func (job, thumbnail_job_completed_callback, sidebar_thumbnails);
 358                         ev_job_cancel (EV_JOB (job));
 359                         g_object_unref (job);
 360                 }
 361
 362                 ev_thumbnails_size_cache_get_size (priv->size_cache, start_page,
 363                                                   priv->rotation,
 364                                                   &width, &height);
 365                 if (!loading_icon || (width != prev_width && height != prev_height)) {
 366                         loading_icon =
 367                                 ev_sidebar_thumbnails_get_loading_icon (sidebar_thumbnails,
 368                                                                         width, height);
 369                 }
 370
 371                 prev_width = width;
 372                 prev_height = height;
 373
 374                 gtk_list_store_set (priv->list_store, &iter,
 375                                     COLUMN_JOB, NULL,
 376                                     COLUMN_THUMBNAIL_SET, FALSE,
 377                                     COLUMN_PIXBUF, loading_icon,
 378                                     -1);
 379         }
 380         gtk_tree_path_free (path);
 381 }
 382
 383 static gdouble
 384 get_scale_for_page (EvSidebarThumbnails *sidebar_thumbnails,
 385                     gint                 page)
 386 {
 387         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 388         gdouble width;
 389
 390         ev_document_get_page_size (priv->document, page, &width, NULL);
 391
 392         return (gdouble)THUMBNAIL_WIDTH / width;
 393 }
 394
 395 static void
 396 add_range (EvSidebarThumbnails *sidebar_thumbnails,
 397            gint                 start_page,
 398            gint                 end_page)
 399 {
 400         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 401         GtkTreePath *path;
 402         GtkTreeIter iter;
 403         gboolean result;
 404         gint page = start_page;
 405
 406         g_assert (start_page <= end_page);
 407
 408         path = gtk_tree_path_new_from_indices (start_page, -1);
 409         for (result = gtk_tree_model_get_iter (GTK_TREE_MODEL (priv->list_store), &iter, path);
 410              result && page <= end_page;
 411              result = gtk_tree_model_iter_next (GTK_TREE_MODEL (priv->list_store), &iter), page ++) {
 412                 EvJob *job;
 413                 gboolean thumbnail_set;
 414
 415                 gtk_tree_model_get (GTK_TREE_MODEL (priv->list_store), &iter,
 416                                     COLUMN_JOB, &job,
 417                                     COLUMN_THUMBNAIL_SET, &thumbnail_set,
 418                                     -1);
 419
 420                 if (job == NULL && !thumbnail_set) {
 421                         job = ev_job_thumbnail_new (priv->document,
 422                                                     page, priv->rotation,
 423                                                     get_scale_for_page (sidebar_thumbnails, page));
 424                         ev_job_scheduler_push_job (EV_JOB (job), EV_JOB_PRIORITY_HIGH);
 425
 426                         g_object_set_data_full (G_OBJECT (job), "tree_iter",
 427                                                 gtk_tree_iter_copy (&iter),
 428                                                 (GDestroyNotify) gtk_tree_iter_free);
 429                         g_signal_connect (job, "finished",
 430                                           G_CALLBACK (thumbnail_job_completed_callback),
 431                                           sidebar_thumbnails);
 432                         gtk_list_store_set (priv->list_store, &iter,
 433                                             COLUMN_JOB, job,
 434                                             -1);
 435
 436                         /* The queue and the list own a ref to the job now */
 437                         g_object_unref (job);
 438                 } else if (job) {
 439                         g_object_unref (job);
 440                 }
 441         }
 442         gtk_tree_path_free (path);
 443 }
 444
 445 /* This modifies start */
 446 static void
 447 update_visible_range (EvSidebarThumbnails *sidebar_thumbnails,
 448                       gint                 start_page,
 449                       gint                 end_page)
 450 {
 451         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 452         int old_start_page, old_end_page;
 453
 454         old_start_page = priv->start_page;
 455         old_end_page = priv->end_page;
 456
 457         if (start_page == old_start_page &&
 458             end_page == old_end_page)
 459                 return;
 460
 461         /* Clear the areas we no longer display */
 462         if (old_start_page >= 0 && old_start_page < start_page)
 463                 clear_range (sidebar_thumbnails, old_start_page, MIN (start_page - 1, old_end_page));
 464
 465         if (old_end_page > 0 && old_end_page > end_page)
 466                 clear_range (sidebar_thumbnails, MAX (end_page + 1, old_start_page), old_end_page);
 467
 468         add_range (sidebar_thumbnails, start_page, end_page);
 469
 470         priv->start_page = start_page;
 471         priv->end_page = end_page;
 472 }
 473
 474 static void
 475 adjustment_changed_cb (EvSidebarThumbnails *sidebar_thumbnails)
 476 {
 477         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 478         GtkTreePath *path = NULL;
 479         GtkTreePath *path2 = NULL;
 480         gdouble page_size;
 481         gdouble value;
 482         gint wy1;
 483         gint wy2;
 484
 485         /* Widget is not currently visible */
 486         if (!gtk_widget_get_mapped (GTK_WIDGET (sidebar_thumbnails)))
 487                 return;
 488
 489         page_size = gtk_adjustment_get_page_size (priv->vadjustment);
 490
 491         if (page_size == 0)
 492                 return;
 493
 494         value = gtk_adjustment_get_value (priv->vadjustment);
 495
 496         if (priv->tree_view) {
 497                 if (! gtk_widget_get_realized (priv->tree_view))
 498                         return;
 499
 500                 gtk_tree_view_convert_tree_to_bin_window_coords (GTK_TREE_VIEW (priv->tree_view),
 501                                                                  0, (int) value,
 502                                                                  NULL, &wy1);
 503                 gtk_tree_view_convert_tree_to_bin_window_coords (GTK_TREE_VIEW (priv->tree_view),
 504                                                                  0, (int) (value + page_size),
 505                                                                  NULL, &wy2);
 506                 gtk_tree_view_get_path_at_pos (GTK_TREE_VIEW (priv->tree_view),
 507                                                1, wy1 + 1, &path,
 508                                                NULL, NULL, NULL);
 509                 gtk_tree_view_get_path_at_pos (GTK_TREE_VIEW (priv->tree_view),
 510                                                1, wy2 -1, &path2,
 511                                                NULL, NULL, NULL);
 512         } else if (priv->icon_view) {
 513                 if (! gtk_widget_get_realized (priv->icon_view))
 514                         return;
 515                 if (! gtk_icon_view_get_visible_range (GTK_ICON_VIEW (priv->icon_view), &path, &path2))
 516                         return;
 517         } else {
 518                 return;
 519         }
 520
 521         if (path && path2) {
 522                 update_visible_range (sidebar_thumbnails,
 523                                       gtk_tree_path_get_indices (path)[0],
 524                                       gtk_tree_path_get_indices (path2)[0]);
 525         }
 526
 527         gtk_tree_path_free (path);
 528         gtk_tree_path_free (path2);
 529 }
 530
 531 static void
 532 ev_sidebar_thumbnails_fill_model (EvSidebarThumbnails *sidebar_thumbnails)
 533 {
 534         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 535         GtkTreeIter iter;
 536         int i;
 537         gint prev_width = -1;
 538         gint prev_height = -1;
 539
 540         for (i = 0; i < sidebar_thumbnails->priv->n_pages; i++) {
 541                 gchar     *page_label;
 542                 gchar     *page_string;
 543                 GdkPixbuf *loading_icon = NULL;
 544                 gint       width, height;
 545
 546                 page_label = ev_document_get_page_label (priv->document, i);
 547                 page_string = g_markup_printf_escaped ("<i>%s</i>", page_label);
 548                 ev_thumbnails_size_cache_get_size (sidebar_thumbnails->priv->size_cache, i,
 549                                                   sidebar_thumbnails->priv->rotation,
 550                                                   &width, &height);
 551                 if (!loading_icon || (width != prev_width && height != prev_height)) {
 552                         loading_icon =
 553                                 ev_sidebar_thumbnails_get_loading_icon (sidebar_thumbnails,
 554                                                                         width, height);
 555                 }
 556
 557                 prev_width = width;
 558                 prev_height = height;
 559
 560                 gtk_list_store_append (priv->list_store, &iter);
 561                 gtk_list_store_set (priv->list_store, &iter,
 562                                     COLUMN_PAGE_STRING, page_string,
 563                                     COLUMN_PIXBUF, loading_icon,
 564                                     COLUMN_THUMBNAIL_SET, FALSE,
 565                                     -1);
 566                 g_free (page_label);
 567                 g_free (page_string);
 568         }
 569 }
 570
 571 static void
 572 ev_sidebar_tree_selection_changed (GtkTreeSelection *selection,
 573                                    EvSidebarThumbnails *ev_sidebar_thumbnails)
 574 {
 575         EvSidebarThumbnailsPrivate *priv = ev_sidebar_thumbnails->priv;
 576         GtkTreePath *path;
 577         GtkTreeIter iter;
 578         int page;
 579
 580         if (!gtk_tree_selection_get_selected (selection, NULL, &iter))
 581                 return;
 582
 583         path = gtk_tree_model_get_path (GTK_TREE_MODEL (priv->list_store),
 584                                         &iter);
 585         page = gtk_tree_path_get_indices (path)[0];
 586         gtk_tree_path_free (path);
 587
 588         ev_document_model_set_page (priv->model, page);
 589 }
 590
 591 static void
 592 ev_sidebar_icon_selection_changed (GtkIconView         *icon_view,
 593                                    EvSidebarThumbnails *ev_sidebar_thumbnails)
 594 {
 595         EvSidebarThumbnailsPrivate *priv = ev_sidebar_thumbnails->priv;
 596         GtkTreePath *path;
 597         GList *selected;
 598         int page;
 599
 600         selected = gtk_icon_view_get_selected_items (icon_view);
 601         if (selected == NULL)
 602                 return;
 603
 604         /* We don't handle or expect multiple selection. */
 605         g_assert (selected->next == NULL);
 606
 607         path = selected->data;
 608         page = gtk_tree_path_get_indices (path)[0];
 609
 610         gtk_tree_path_free (path);
 611         g_list_free (selected);
 612
 613         ev_document_model_set_page (priv->model, page);
 614 }
 615
 616 static void
 617 ev_sidebar_init_tree_view (EvSidebarThumbnails *ev_sidebar_thumbnails)
 618 {
 619         EvSidebarThumbnailsPrivate *priv;
 620         GtkTreeSelection *selection;
 621         GtkCellRenderer *renderer;
 622
 623         priv = ev_sidebar_thumbnails->priv;
 624         priv->tree_view = gtk_tree_view_new_with_model (GTK_TREE_MODEL (priv->list_store));
 625
 626         selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (priv->tree_view));
 627         g_signal_connect (selection, "changed",
 628                           G_CALLBACK (ev_sidebar_tree_selection_changed), ev_sidebar_thumbnails);
 629         gtk_tree_view_set_headers_visible (GTK_TREE_VIEW (priv->tree_view), FALSE);
 630         renderer = g_object_new (GTK_TYPE_CELL_RENDERER_PIXBUF,
 631                                  "xpad", 2,
 632                                  "ypad", 2,
 633                                  NULL);
 634         gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (priv->tree_view), -1,
 635                                                      NULL, renderer,
 636                                                      "pixbuf", 1,
 637                                                      NULL);
 638         gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (priv->tree_view), -1,
 639                                                      NULL, gtk_cell_renderer_text_new (),
 640                                                      "markup", 0, NULL);
 641         gtk_container_add (GTK_CONTAINER (priv->swindow), priv->tree_view);
 642         gtk_widget_show (priv->tree_view);
 643 }
 644
 645 static void
 646 ev_sidebar_init_icon_view (EvSidebarThumbnails *ev_sidebar_thumbnails)
 647 {
 648         EvSidebarThumbnailsPrivate *priv;
 649
 650         priv = ev_sidebar_thumbnails->priv;
 651
 652         priv->icon_view = gtk_icon_view_new_with_model (GTK_TREE_MODEL (priv->list_store));
 653         gtk_icon_view_set_markup_column (GTK_ICON_VIEW (priv->icon_view), 0);
 654         gtk_icon_view_set_pixbuf_column (GTK_ICON_VIEW (priv->icon_view), 1);
 655         g_signal_connect (priv->icon_view, "selection-changed",
 656                           G_CALLBACK (ev_sidebar_icon_selection_changed), ev_sidebar_thumbnails);
 657
 658         gtk_container_add (GTK_CONTAINER (priv->swindow), priv->icon_view);
 659         gtk_widget_show (priv->icon_view);
 660 }
 661
 662 static gboolean
 663 ev_sidebar_thumbnails_use_icon_view (EvSidebarThumbnails *sidebar_thumbnails)
 664 {
 665         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 666
 667         return (ev_document_get_n_pages (priv->document) <= MAX_ICON_VIEW_PAGE_COUNT);
 668 }
 669
 670 static void
 671 ev_sidebar_thumbnails_init (EvSidebarThumbnails *ev_sidebar_thumbnails)
 672 {
 673         EvSidebarThumbnailsPrivate *priv;
 674
 675         priv = ev_sidebar_thumbnails->priv = EV_SIDEBAR_THUMBNAILS_GET_PRIVATE (ev_sidebar_thumbnails);
 676
 677         priv->list_store = gtk_list_store_new (NUM_COLUMNS,
 678                                                G_TYPE_STRING,
 679                                                GDK_TYPE_PIXBUF,
 680                                                G_TYPE_BOOLEAN,
 681                                                EV_TYPE_JOB_THUMBNAIL);
 682
 683         priv->swindow = gtk_scrolled_window_new (NULL, NULL);
 684
 685         /* We actually don't want GTK_POLICY_AUTOMATIC for horizontal scrollbar here
 686          * it's just a workaround for bug #449462
 687          */
 688         gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (priv->swindow),
 689                                         GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);
 690         gtk_scrolled_window_set_shadow_type (GTK_SCROLLED_WINDOW (priv->swindow),
 691                                              GTK_SHADOW_IN);
 692         priv->vadjustment = gtk_scrolled_window_get_vadjustment (GTK_SCROLLED_WINDOW (priv->swindow));
 693         g_signal_connect_data (priv->vadjustment, "value-changed",
 694                                G_CALLBACK (adjustment_changed_cb),
 695                                ev_sidebar_thumbnails, NULL,
 696                                G_CONNECT_SWAPPED | G_CONNECT_AFTER);
 697         g_signal_connect_swapped (priv->swindow, "size-allocate",
 698                                   G_CALLBACK (adjustment_changed_cb),
 699                                   ev_sidebar_thumbnails);
 700         gtk_box_pack_start (GTK_BOX (ev_sidebar_thumbnails), priv->swindow, TRUE, TRUE, 0);
 701
 702         /* Put it all together */
 703         gtk_widget_show_all (priv->swindow);
 704 }
 705
 706 static void
 707 ev_sidebar_thumbnails_set_current_page (EvSidebarThumbnails *sidebar,
 708                                         gint                 page)
 709 {
 710         GtkTreeView *tree_view;
 711         GtkTreePath *path;
 712
 713         path = gtk_tree_path_new_from_indices (page, -1);
 714
 715         if (sidebar->priv->tree_view) {
 716                 tree_view = GTK_TREE_VIEW (sidebar->priv->tree_view);
 717                 gtk_tree_view_set_cursor (tree_view, path, NULL, FALSE);
 718                 gtk_tree_view_scroll_to_cell (tree_view, path, NULL, FALSE, 0.0, 0.0);
 719         } else if (sidebar->priv->icon_view) {
 720
 721                 g_signal_handlers_block_by_func
 722                         (sidebar->priv->icon_view,
 723                          G_CALLBACK (ev_sidebar_icon_selection_changed), sidebar);
 724
 725                 gtk_icon_view_select_path (GTK_ICON_VIEW (sidebar->priv->icon_view), path);
 726
 727                 g_signal_handlers_unblock_by_func
 728                         (sidebar->priv->icon_view,
 729                          G_CALLBACK (ev_sidebar_icon_selection_changed), sidebar);
 730
 731                 gtk_icon_view_set_cursor (GTK_ICON_VIEW (sidebar->priv->icon_view), path, NULL, FALSE);
 732         }
 733
 734         gtk_tree_path_free (path);
 735 }
 736
 737 static void
 738 page_changed_cb (EvSidebarThumbnails *sidebar,
 739                  gint                 old_page,
 740                  gint                 new_page)
 741 {
 742         ev_sidebar_thumbnails_set_current_page (sidebar, new_page);
 743 }
 744
 745 static gboolean
 746 refresh (EvSidebarThumbnails *sidebar_thumbnails)
 747 {
 748         adjustment_changed_cb (sidebar_thumbnails);
 749         return FALSE;
 750 }
 751
 752 static void
 753 ev_sidebar_thumbnails_reload (EvSidebarThumbnails *sidebar_thumbnails)
 754 {
 755         EvDocumentModel *model;
 756
 757         if (sidebar_thumbnails->priv->loading_icons)
 758                 g_hash_table_remove_all (sidebar_thumbnails->priv->loading_icons);
 759
 760         if (sidebar_thumbnails->priv->document == NULL ||
 761             sidebar_thumbnails->priv->n_pages <= 0)
 762                 return;
 763
 764         model = sidebar_thumbnails->priv->model;
 765
 766         ev_sidebar_thumbnails_clear_model (sidebar_thumbnails);
 767         ev_sidebar_thumbnails_fill_model (sidebar_thumbnails);
 768
 769         /* Trigger a redraw */
 770         sidebar_thumbnails->priv->start_page = -1;
 771         sidebar_thumbnails->priv->end_page = -1;
 772         ev_sidebar_thumbnails_set_current_page (sidebar_thumbnails,
 773                                                 ev_document_model_get_page (model));
 774         g_idle_add ((GSourceFunc)refresh, sidebar_thumbnails);
 775 }
 776
 777 static void
 778 ev_sidebar_thumbnails_rotation_changed_cb (EvDocumentModel     *model,
 779                                            GParamSpec          *pspec,
 780                                            EvSidebarThumbnails *sidebar_thumbnails)
 781 {
 782         gint rotation = ev_document_model_get_rotation (model);
 783
 784         sidebar_thumbnails->priv->rotation = rotation;
 785         ev_sidebar_thumbnails_reload (sidebar_thumbnails);
 786 }
 787
 788 static void
 789 ev_sidebar_thumbnails_inverted_colors_changed_cb (EvDocumentModel     *model,
 790                                                   GParamSpec          *pspec,
 791                                                   EvSidebarThumbnails *sidebar_thumbnails)
 792 {
 793         gboolean inverted_colors = ev_document_model_get_inverted_colors (model);
 794
 795         sidebar_thumbnails->priv->inverted_colors = inverted_colors;
 796         ev_sidebar_thumbnails_reload (sidebar_thumbnails);
 797 }
 798
 799 static void
 800 thumbnail_job_completed_callback (EvJobThumbnail      *job,
 801                                   EvSidebarThumbnails *sidebar_thumbnails)
 802 {
 803         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 804         GtkTreeIter *iter;
 805
 806         iter = (GtkTreeIter *) g_object_get_data (G_OBJECT (job), "tree_iter");
 807         if (priv->inverted_colors)
 808                 ev_document_misc_invert_pixbuf (job->thumbnail);
 809         gtk_list_store_set (priv->list_store,
 810                             iter,
 811                             COLUMN_PIXBUF, job->thumbnail,
 812                             COLUMN_THUMBNAIL_SET, TRUE,
 813                             COLUMN_JOB, NULL,
 814                             -1);
 815 }
 816
 817 static void
 818 ev_sidebar_thumbnails_document_changed_cb (EvDocumentModel     *model,
 819                                            GParamSpec          *pspec,
 820                                            EvSidebarThumbnails *sidebar_thumbnails)
 821 {
 822         EvDocument *document = ev_document_model_get_document (model);
 823         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 824
 825         if (!EV_IS_DOCUMENT_THUMBNAILS (document) ||
 826             ev_document_get_n_pages (document) <= 0 ||
 827             !ev_document_check_dimensions (document)) {
 828                 return;
 829         }
 830
 831         priv->size_cache = ev_thumbnails_size_cache_get (document);
 832         priv->document = document;
 833         priv->n_pages = ev_document_get_n_pages (document);
 834         priv->rotation = ev_document_model_get_rotation (model);
 835         priv->inverted_colors = ev_document_model_get_inverted_colors (model);
 836         priv->loading_icons = g_hash_table_new_full (g_str_hash,
 837                                                      g_str_equal,
 838                                                      (GDestroyNotify)g_free,
 839                                                      (GDestroyNotify)g_object_unref);
 840
 841         ev_sidebar_thumbnails_clear_model (sidebar_thumbnails);
 842         ev_sidebar_thumbnails_fill_model (sidebar_thumbnails);
 843
 844         /* Create the view widget, and remove the old one, if needed */
 845         if (ev_sidebar_thumbnails_use_icon_view (sidebar_thumbnails)) {
 846                 if (priv->tree_view) {
 847                         gtk_container_remove (GTK_CONTAINER (priv->swindow), priv->tree_view);
 848                         priv->tree_view = NULL;
 849                 }
 850
 851                 if (! priv->icon_view) {
 852                         ev_sidebar_init_icon_view (sidebar_thumbnails);
 853                         g_object_notify (G_OBJECT (sidebar_thumbnails), "main_widget");
 854                 } else {
 855                         gtk_widget_queue_resize (priv->icon_view);
 856                 }
 857         } else {
 858                 if (priv->icon_view) {
 859                         gtk_container_remove (GTK_CONTAINER (priv->swindow), priv->icon_view);
 860                         priv->icon_view = NULL;
 861                 }
 862
 863                 if (! priv->tree_view) {
 864                         ev_sidebar_init_tree_view (sidebar_thumbnails);
 865                         g_object_notify (G_OBJECT (sidebar_thumbnails), "main_widget");
 866                 }
 867         }
 868
 869         /* Connect to the signal and trigger a fake callback */
 870         g_signal_connect_swapped (priv->model, "page-changed",
 871                                   G_CALLBACK (page_changed_cb),
 872                                   sidebar_thumbnails);
 873         g_signal_connect (priv->model, "notify::rotation",
 874                           G_CALLBACK (ev_sidebar_thumbnails_rotation_changed_cb),
 875                           sidebar_thumbnails);
 876         g_signal_connect (priv->model, "notify::inverted-colors",
 877                           G_CALLBACK (ev_sidebar_thumbnails_inverted_colors_changed_cb),
 878                           sidebar_thumbnails);
 879         sidebar_thumbnails->priv->start_page = -1;
 880         sidebar_thumbnails->priv->end_page = -1;
 881         ev_sidebar_thumbnails_set_current_page (sidebar_thumbnails,
 882                                                 ev_document_model_get_page (model));
 883         adjustment_changed_cb (sidebar_thumbnails);
 884 }
 885
 886 static void
 887 ev_sidebar_thumbnails_set_model (EvSidebarPage   *sidebar_page,
 888                                  EvDocumentModel *model)
 889 {
 890         EvSidebarThumbnails *sidebar_thumbnails = EV_SIDEBAR_THUMBNAILS (sidebar_page);
 891         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 892
 893         if (priv->model == model)
 894                 return;
 895
 896         priv->model = model;
 897         g_signal_connect (model, "notify::document",
 898                           G_CALLBACK (ev_sidebar_thumbnails_document_changed_cb),
 899                           sidebar_page);
 900 }
 901
 902 static gboolean
 903 ev_sidebar_thumbnails_clear_job (GtkTreeModel *model,
 904                                  GtkTreePath *path,
 905                                  GtkTreeIter *iter,
 906                                  gpointer data)
 907 {
 908         EvJob *job;
 909
 910         gtk_tree_model_get (model, iter, COLUMN_JOB, &job, -1);
 911
 912         if (job != NULL) {
 913                 ev_job_cancel (job);
 914                 g_signal_handlers_disconnect_by_func (job, thumbnail_job_completed_callback, data);
 915                 g_object_unref (job);
 916         }
 917
 918         return FALSE;
 919 }
 920
 921 static void
 922 ev_sidebar_thumbnails_clear_model (EvSidebarThumbnails *sidebar_thumbnails)
 923 {
 924         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 925
 926         gtk_tree_model_foreach (GTK_TREE_MODEL (priv->list_store), ev_sidebar_thumbnails_clear_job, sidebar_thumbnails);
 927         gtk_list_store_clear (priv->list_store);
 928 }
 929
 930 static gboolean
 931 ev_sidebar_thumbnails_support_document (EvSidebarPage   *sidebar_page,
 932                                         EvDocument *document)
 933 {
 934         return (EV_IS_DOCUMENT_THUMBNAILS (document));
 935 }
 936
 937 static const gchar*
 938 ev_sidebar_thumbnails_get_label (EvSidebarPage *sidebar_page)
 939 {
 940         return _("Thumbnails");
 941 }
 942
 943 static void
 944 ev_sidebar_thumbnails_page_iface_init (EvSidebarPageInterface *iface)
 945 {
 946         iface->support_document = ev_sidebar_thumbnails_support_document;
 947         iface->set_model = ev_sidebar_thumbnails_set_model;
 948         iface->get_label = ev_sidebar_thumbnails_get_label;
 949 }