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         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 336         GdkPixbuf *icon;
 337         gchar     *key;
 338
 339         key = g_strdup_printf ("%dx%d", width, height);
 340         icon = g_hash_table_lookup (priv->loading_icons, key);
 341         if (!icon) {
 342                 gboolean inverted_colors;
 343
 344                 inverted_colors = ev_document_model_get_inverted_colors (priv->model);
 345                 icon = ev_document_misc_get_loading_thumbnail (width, height, inverted_colors);
 346                 g_hash_table_insert (priv->loading_icons, key, icon);
 347         } else {
 348                 g_free (key);
 349         }
 350
 351         return icon;
 352 }
 353
 354 static void
 355 clear_range (EvSidebarThumbnails *sidebar_thumbnails,
 356              gint                 start_page,
 357              gint                 end_page)
 358 {
 359         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 360         GtkTreePath *path;
 361         GtkTreeIter iter;
 362         gboolean result;
 363         gint prev_width = -1;
 364         gint prev_height = -1;
 365
 366         g_assert (start_page <= end_page);
 367
 368         path = gtk_tree_path_new_from_indices (start_page, -1);
 369         for (result = gtk_tree_model_get_iter (GTK_TREE_MODEL (priv->list_store), &iter, path);
 370              result && start_page <= end_page;
 371              result = gtk_tree_model_iter_next (GTK_TREE_MODEL (priv->list_store), &iter), start_page ++) {
 372                 EvJobThumbnail *job;
 373                 GdkPixbuf *loading_icon = NULL;
 374                 gint width, height;
 375
 376                 gtk_tree_model_get (GTK_TREE_MODEL (priv->list_store),
 377                                     &iter,
 378                                     COLUMN_JOB, &job,
 379                                     -1);
 380
 381                 if (job) {
 382                         g_signal_handlers_disconnect_by_func (job, thumbnail_job_completed_callback, sidebar_thumbnails);
 383                         ev_job_cancel (EV_JOB (job));
 384                         g_object_unref (job);
 385                 }
 386
 387                 ev_thumbnails_size_cache_get_size (priv->size_cache, start_page,
 388                                                   priv->rotation,
 389                                                   &width, &height);
 390                 if (!loading_icon || (width != prev_width && height != prev_height)) {
 391                         loading_icon =
 392                                 ev_sidebar_thumbnails_get_loading_icon (sidebar_thumbnails,
 393                                                                         width, height);
 394                 }
 395
 396                 prev_width = width;
 397                 prev_height = height;
 398
 399                 gtk_list_store_set (priv->list_store, &iter,
 400                                     COLUMN_JOB, NULL,
 401                                     COLUMN_THUMBNAIL_SET, FALSE,
 402                                     COLUMN_PIXBUF, loading_icon,
 403                                     -1);
 404         }
 405         gtk_tree_path_free (path);
 406 }
 407
 408 static gdouble
 409 get_scale_for_page (EvSidebarThumbnails *sidebar_thumbnails,
 410                     gint                 page)
 411 {
 412         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 413         gdouble width;
 414
 415         ev_document_get_page_size (priv->document, page, &width, NULL);
 416
 417         return (gdouble)THUMBNAIL_WIDTH / width;
 418 }
 419
 420 static void
 421 add_range (EvSidebarThumbnails *sidebar_thumbnails,
 422            gint                 start_page,
 423            gint                 end_page)
 424 {
 425         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 426         GtkTreePath *path;
 427         GtkTreeIter iter;
 428         gboolean result;
 429         gint page = start_page;
 430
 431         g_assert (start_page <= end_page);
 432
 433         path = gtk_tree_path_new_from_indices (start_page, -1);
 434         for (result = gtk_tree_model_get_iter (GTK_TREE_MODEL (priv->list_store), &iter, path);
 435              result && page <= end_page;
 436              result = gtk_tree_model_iter_next (GTK_TREE_MODEL (priv->list_store), &iter), page ++) {
 437                 EvJob *job;
 438                 gboolean thumbnail_set;
 439
 440                 gtk_tree_model_get (GTK_TREE_MODEL (priv->list_store), &iter,
 441                                     COLUMN_JOB, &job,
 442                                     COLUMN_THUMBNAIL_SET, &thumbnail_set,
 443                                     -1);
 444
 445                 if (job == NULL && !thumbnail_set) {
 446                         job = ev_job_thumbnail_new (priv->document,
 447                                                     page, priv->rotation,
 448                                                     get_scale_for_page (sidebar_thumbnails, page));
 449                         ev_job_scheduler_push_job (EV_JOB (job), EV_JOB_PRIORITY_HIGH);
 450
 451                         g_object_set_data_full (G_OBJECT (job), "tree_iter",
 452                                                 gtk_tree_iter_copy (&iter),
 453                                                 (GDestroyNotify) gtk_tree_iter_free);
 454                         g_signal_connect (job, "finished",
 455                                           G_CALLBACK (thumbnail_job_completed_callback),
 456                                           sidebar_thumbnails);
 457                         gtk_list_store_set (priv->list_store, &iter,
 458                                             COLUMN_JOB, job,
 459                                             -1);
 460
 461                         /* The queue and the list own a ref to the job now */
 462                         g_object_unref (job);
 463                 } else if (job) {
 464                         g_object_unref (job);
 465                 }
 466         }
 467         gtk_tree_path_free (path);
 468 }
 469
 470 /* This modifies start */
 471 static void
 472 update_visible_range (EvSidebarThumbnails *sidebar_thumbnails,
 473                       gint                 start_page,
 474                       gint                 end_page)
 475 {
 476         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 477         int old_start_page, old_end_page;
 478
 479         old_start_page = priv->start_page;
 480         old_end_page = priv->end_page;
 481
 482         if (start_page == old_start_page &&
 483             end_page == old_end_page)
 484                 return;
 485
 486         /* Clear the areas we no longer display */
 487         if (old_start_page >= 0 && old_start_page < start_page)
 488                 clear_range (sidebar_thumbnails, old_start_page, MIN (start_page - 1, old_end_page));
 489
 490         if (old_end_page > 0 && old_end_page > end_page)
 491                 clear_range (sidebar_thumbnails, MAX (end_page + 1, old_start_page), old_end_page);
 492
 493         add_range (sidebar_thumbnails, start_page, end_page);
 494
 495         priv->start_page = start_page;
 496         priv->end_page = end_page;
 497 }
 498
 499 static void
 500 adjustment_changed_cb (EvSidebarThumbnails *sidebar_thumbnails)
 501 {
 502         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 503         GtkTreePath *path = NULL;
 504         GtkTreePath *path2 = NULL;
 505         gdouble page_size;
 506         gdouble value;
 507         gint wy1;
 508         gint wy2;
 509
 510         /* Widget is not currently visible */
 511         if (!gtk_widget_get_mapped (GTK_WIDGET (sidebar_thumbnails)))
 512                 return;
 513
 514         page_size = gtk_adjustment_get_page_size (priv->vadjustment);
 515
 516         if (page_size == 0)
 517                 return;
 518
 519         value = gtk_adjustment_get_value (priv->vadjustment);
 520
 521         if (priv->tree_view) {
 522                 if (! gtk_widget_get_realized (priv->tree_view))
 523                         return;
 524
 525                 gtk_tree_view_convert_tree_to_bin_window_coords (GTK_TREE_VIEW (priv->tree_view),
 526                                                                  0, (int) value,
 527                                                                  NULL, &wy1);
 528                 gtk_tree_view_convert_tree_to_bin_window_coords (GTK_TREE_VIEW (priv->tree_view),
 529                                                                  0, (int) (value + page_size),
 530                                                                  NULL, &wy2);
 531                 gtk_tree_view_get_path_at_pos (GTK_TREE_VIEW (priv->tree_view),
 532                                                1, wy1 + 1, &path,
 533                                                NULL, NULL, NULL);
 534                 gtk_tree_view_get_path_at_pos (GTK_TREE_VIEW (priv->tree_view),
 535                                                1, wy2 -1, &path2,
 536                                                NULL, NULL, NULL);
 537         } else if (priv->icon_view) {
 538                 if (! gtk_widget_get_realized (priv->icon_view))
 539                         return;
 540                 if (! gtk_icon_view_get_visible_range (GTK_ICON_VIEW (priv->icon_view), &path, &path2))
 541                         return;
 542         } else {
 543                 return;
 544         }
 545
 546         if (path && path2) {
 547                 update_visible_range (sidebar_thumbnails,
 548                                       gtk_tree_path_get_indices (path)[0],
 549                                       gtk_tree_path_get_indices (path2)[0]);
 550         }
 551
 552         gtk_tree_path_free (path);
 553         gtk_tree_path_free (path2);
 554 }
 555
 556 static void
 557 ev_sidebar_thumbnails_fill_model (EvSidebarThumbnails *sidebar_thumbnails)
 558 {
 559         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 560         GtkTreeIter iter;
 561         int i;
 562         gint prev_width = -1;
 563         gint prev_height = -1;
 564
 565         for (i = 0; i < sidebar_thumbnails->priv->n_pages; i++) {
 566                 gchar     *page_label;
 567                 gchar     *page_string;
 568                 GdkPixbuf *loading_icon = NULL;
 569                 gint       width, height;
 570
 571                 page_label = ev_document_get_page_label (priv->document, i);
 572                 page_string = g_markup_printf_escaped ("<i>%s</i>", page_label);
 573                 ev_thumbnails_size_cache_get_size (sidebar_thumbnails->priv->size_cache, i,
 574                                                   sidebar_thumbnails->priv->rotation,
 575                                                   &width, &height);
 576                 if (!loading_icon || (width != prev_width && height != prev_height)) {
 577                         loading_icon =
 578                                 ev_sidebar_thumbnails_get_loading_icon (sidebar_thumbnails,
 579                                                                         width, height);
 580                 }
 581
 582                 prev_width = width;
 583                 prev_height = height;
 584
 585                 gtk_list_store_append (priv->list_store, &iter);
 586                 gtk_list_store_set (priv->list_store, &iter,
 587                                     COLUMN_PAGE_STRING, page_string,
 588                                     COLUMN_PIXBUF, loading_icon,
 589                                     COLUMN_THUMBNAIL_SET, FALSE,
 590                                     -1);
 591                 g_free (page_label);
 592                 g_free (page_string);
 593         }
 594 }
 595
 596 static void
 597 ev_sidebar_tree_selection_changed (GtkTreeSelection *selection,
 598                                    EvSidebarThumbnails *ev_sidebar_thumbnails)
 599 {
 600         EvSidebarThumbnailsPrivate *priv = ev_sidebar_thumbnails->priv;
 601         GtkTreePath *path;
 602         GtkTreeIter iter;
 603         int page;
 604
 605         if (!gtk_tree_selection_get_selected (selection, NULL, &iter))
 606                 return;
 607
 608         path = gtk_tree_model_get_path (GTK_TREE_MODEL (priv->list_store),
 609                                         &iter);
 610         page = gtk_tree_path_get_indices (path)[0];
 611         gtk_tree_path_free (path);
 612
 613         ev_document_model_set_page (priv->model, page);
 614 }
 615
 616 static void
 617 ev_sidebar_icon_selection_changed (GtkIconView         *icon_view,
 618                                    EvSidebarThumbnails *ev_sidebar_thumbnails)
 619 {
 620         EvSidebarThumbnailsPrivate *priv = ev_sidebar_thumbnails->priv;
 621         GtkTreePath *path;
 622         GList *selected;
 623         int page;
 624
 625         selected = gtk_icon_view_get_selected_items (icon_view);
 626         if (selected == NULL)
 627                 return;
 628
 629         /* We don't handle or expect multiple selection. */
 630         g_assert (selected->next == NULL);
 631
 632         path = selected->data;
 633         page = gtk_tree_path_get_indices (path)[0];
 634
 635         gtk_tree_path_free (path);
 636         g_list_free (selected);
 637
 638         ev_document_model_set_page (priv->model, page);
 639 }
 640
 641 static void
 642 ev_sidebar_init_tree_view (EvSidebarThumbnails *ev_sidebar_thumbnails)
 643 {
 644         EvSidebarThumbnailsPrivate *priv;
 645         GtkTreeSelection *selection;
 646         GtkCellRenderer *renderer;
 647
 648         priv = ev_sidebar_thumbnails->priv;
 649         priv->tree_view = gtk_tree_view_new_with_model (GTK_TREE_MODEL (priv->list_store));
 650
 651         selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (priv->tree_view));
 652         g_signal_connect (selection, "changed",
 653                           G_CALLBACK (ev_sidebar_tree_selection_changed), ev_sidebar_thumbnails);
 654         gtk_tree_view_set_headers_visible (GTK_TREE_VIEW (priv->tree_view), FALSE);
 655         renderer = g_object_new (GTK_TYPE_CELL_RENDERER_PIXBUF,
 656                                  "xpad", 2,
 657                                  "ypad", 2,
 658                                  NULL);
 659         gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (priv->tree_view), -1,
 660                                                      NULL, renderer,
 661                                                      "pixbuf", 1,
 662                                                      NULL);
 663         gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (priv->tree_view), -1,
 664                                                      NULL, gtk_cell_renderer_text_new (),
 665                                                      "markup", 0, NULL);
 666         gtk_container_add (GTK_CONTAINER (priv->swindow), priv->tree_view);
 667         gtk_widget_show (priv->tree_view);
 668 }
 669
 670 static void
 671 ev_sidebar_init_icon_view (EvSidebarThumbnails *ev_sidebar_thumbnails)
 672 {
 673         EvSidebarThumbnailsPrivate *priv;
 674
 675         priv = ev_sidebar_thumbnails->priv;
 676
 677         priv->icon_view = gtk_icon_view_new_with_model (GTK_TREE_MODEL (priv->list_store));
 678         gtk_icon_view_set_markup_column (GTK_ICON_VIEW (priv->icon_view), 0);
 679         gtk_icon_view_set_pixbuf_column (GTK_ICON_VIEW (priv->icon_view), 1);
 680         g_signal_connect (priv->icon_view, "selection-changed",
 681                           G_CALLBACK (ev_sidebar_icon_selection_changed), ev_sidebar_thumbnails);
 682
 683         gtk_container_add (GTK_CONTAINER (priv->swindow), priv->icon_view);
 684         gtk_widget_show (priv->icon_view);
 685 }
 686
 687 static gboolean
 688 ev_sidebar_thumbnails_use_icon_view (EvSidebarThumbnails *sidebar_thumbnails)
 689 {
 690         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 691
 692         return (ev_document_get_n_pages (priv->document) <= MAX_ICON_VIEW_PAGE_COUNT);
 693 }
 694
 695 static void
 696 ev_sidebar_thumbnails_init (EvSidebarThumbnails *ev_sidebar_thumbnails)
 697 {
 698         EvSidebarThumbnailsPrivate *priv;
 699
 700         priv = ev_sidebar_thumbnails->priv = EV_SIDEBAR_THUMBNAILS_GET_PRIVATE (ev_sidebar_thumbnails);
 701
 702         priv->list_store = gtk_list_store_new (NUM_COLUMNS,
 703                                                G_TYPE_STRING,
 704                                                GDK_TYPE_PIXBUF,
 705                                                G_TYPE_BOOLEAN,
 706                                                EV_TYPE_JOB_THUMBNAIL);
 707
 708         priv->swindow = gtk_scrolled_window_new (NULL, NULL);
 709
 710         /* We actually don't want GTK_POLICY_AUTOMATIC for horizontal scrollbar here
 711          * it's just a workaround for bug #449462
 712          */
 713         gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (priv->swindow),
 714                                         GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);
 715         gtk_scrolled_window_set_shadow_type (GTK_SCROLLED_WINDOW (priv->swindow),
 716                                              GTK_SHADOW_IN);
 717         priv->vadjustment = gtk_scrolled_window_get_vadjustment (GTK_SCROLLED_WINDOW (priv->swindow));
 718         g_signal_connect_data (priv->vadjustment, "value-changed",
 719                                G_CALLBACK (adjustment_changed_cb),
 720                                ev_sidebar_thumbnails, NULL,
 721                                G_CONNECT_SWAPPED | G_CONNECT_AFTER);
 722         g_signal_connect_swapped (priv->swindow, "size-allocate",
 723                                   G_CALLBACK (adjustment_changed_cb),
 724                                   ev_sidebar_thumbnails);
 725         gtk_box_pack_start (GTK_BOX (ev_sidebar_thumbnails), priv->swindow, TRUE, TRUE, 0);
 726
 727         /* Put it all together */
 728         gtk_widget_show_all (priv->swindow);
 729 }
 730
 731 static void
 732 ev_sidebar_thumbnails_set_current_page (EvSidebarThumbnails *sidebar,
 733                                         gint                 page)
 734 {
 735         GtkTreeView *tree_view;
 736         GtkTreePath *path;
 737
 738         path = gtk_tree_path_new_from_indices (page, -1);
 739
 740         if (sidebar->priv->tree_view) {
 741                 tree_view = GTK_TREE_VIEW (sidebar->priv->tree_view);
 742                 gtk_tree_view_set_cursor (tree_view, path, NULL, FALSE);
 743                 gtk_tree_view_scroll_to_cell (tree_view, path, NULL, FALSE, 0.0, 0.0);
 744         } else if (sidebar->priv->icon_view) {
 745
 746                 g_signal_handlers_block_by_func
 747                         (sidebar->priv->icon_view,
 748                          G_CALLBACK (ev_sidebar_icon_selection_changed), sidebar);
 749
 750                 gtk_icon_view_select_path (GTK_ICON_VIEW (sidebar->priv->icon_view), path);
 751
 752                 g_signal_handlers_unblock_by_func
 753                         (sidebar->priv->icon_view,
 754                          G_CALLBACK (ev_sidebar_icon_selection_changed), sidebar);
 755
 756                 gtk_icon_view_set_cursor (GTK_ICON_VIEW (sidebar->priv->icon_view), path, NULL, FALSE);
 757         }
 758
 759         gtk_tree_path_free (path);
 760 }
 761
 762 static void
 763 page_changed_cb (EvSidebarThumbnails *sidebar,
 764                  gint                 old_page,
 765                  gint                 new_page)
 766 {
 767         ev_sidebar_thumbnails_set_current_page (sidebar, new_page);
 768 }
 769
 770 static gboolean
 771 refresh (EvSidebarThumbnails *sidebar_thumbnails)
 772 {
 773         adjustment_changed_cb (sidebar_thumbnails);
 774         return FALSE;
 775 }
 776
 777 static void
 778 ev_sidebar_thumbnails_reload (EvSidebarThumbnails *sidebar_thumbnails)
 779 {
 780         EvDocumentModel *model;
 781
 782         if (sidebar_thumbnails->priv->loading_icons)
 783                 g_hash_table_remove_all (sidebar_thumbnails->priv->loading_icons);
 784
 785         if (sidebar_thumbnails->priv->document == NULL ||
 786             sidebar_thumbnails->priv->n_pages <= 0)
 787                 return;
 788
 789         model = sidebar_thumbnails->priv->model;
 790
 791         ev_sidebar_thumbnails_clear_model (sidebar_thumbnails);
 792         ev_sidebar_thumbnails_fill_model (sidebar_thumbnails);
 793
 794         /* Trigger a redraw */
 795         sidebar_thumbnails->priv->start_page = -1;
 796         sidebar_thumbnails->priv->end_page = -1;
 797         ev_sidebar_thumbnails_set_current_page (sidebar_thumbnails,
 798                                                 ev_document_model_get_page (model));
 799         g_idle_add ((GSourceFunc)refresh, sidebar_thumbnails);
 800 }
 801
 802 static void
 803 ev_sidebar_thumbnails_rotation_changed_cb (EvDocumentModel     *model,
 804                                            GParamSpec          *pspec,
 805                                            EvSidebarThumbnails *sidebar_thumbnails)
 806 {
 807         gint rotation = ev_document_model_get_rotation (model);
 808
 809         sidebar_thumbnails->priv->rotation = rotation;
 810         ev_sidebar_thumbnails_reload (sidebar_thumbnails);
 811 }
 812
 813 static void
 814 ev_sidebar_thumbnails_inverted_colors_changed_cb (EvDocumentModel     *model,
 815                                                   GParamSpec          *pspec,
 816                                                   EvSidebarThumbnails *sidebar_thumbnails)
 817 {
 818         gboolean inverted_colors = ev_document_model_get_inverted_colors (model);
 819
 820         sidebar_thumbnails->priv->inverted_colors = inverted_colors;
 821         ev_sidebar_thumbnails_reload (sidebar_thumbnails);
 822 }
 823
 824 static void
 825 thumbnail_job_completed_callback (EvJobThumbnail      *job,
 826                                   EvSidebarThumbnails *sidebar_thumbnails)
 827 {
 828         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 829         GtkTreeIter *iter;
 830
 831         iter = (GtkTreeIter *) g_object_get_data (G_OBJECT (job), "tree_iter");
 832         if (priv->inverted_colors)
 833                 ev_document_misc_invert_pixbuf (job->thumbnail);
 834         gtk_list_store_set (priv->list_store,
 835                             iter,
 836                             COLUMN_PIXBUF, job->thumbnail,
 837                             COLUMN_THUMBNAIL_SET, TRUE,
 838                             COLUMN_JOB, NULL,
 839                             -1);
 840 }
 841
 842 static void
 843 ev_sidebar_thumbnails_document_changed_cb (EvDocumentModel     *model,
 844                                            GParamSpec          *pspec,
 845                                            EvSidebarThumbnails *sidebar_thumbnails)
 846 {
 847         EvDocument *document = ev_document_model_get_document (model);
 848         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 849
 850         if (!EV_IS_DOCUMENT_THUMBNAILS (document) ||
 851             ev_document_get_n_pages (document) <= 0 ||
 852             !ev_document_check_dimensions (document)) {
 853                 return;
 854         }
 855
 856         priv->size_cache = ev_thumbnails_size_cache_get (document);
 857         priv->document = document;
 858         priv->n_pages = ev_document_get_n_pages (document);
 859         priv->rotation = ev_document_model_get_rotation (model);
 860         priv->inverted_colors = ev_document_model_get_inverted_colors (model);
 861         priv->loading_icons = g_hash_table_new_full (g_str_hash,
 862                                                      g_str_equal,
 863                                                      (GDestroyNotify)g_free,
 864                                                      (GDestroyNotify)g_object_unref);
 865
 866         ev_sidebar_thumbnails_clear_model (sidebar_thumbnails);
 867         ev_sidebar_thumbnails_fill_model (sidebar_thumbnails);
 868
 869         /* Create the view widget, and remove the old one, if needed */
 870         if (ev_sidebar_thumbnails_use_icon_view (sidebar_thumbnails)) {
 871                 if (priv->tree_view) {
 872                         gtk_container_remove (GTK_CONTAINER (priv->swindow), priv->tree_view);
 873                         priv->tree_view = NULL;
 874                 }
 875
 876                 if (! priv->icon_view) {
 877                         ev_sidebar_init_icon_view (sidebar_thumbnails);
 878                         g_object_notify (G_OBJECT (sidebar_thumbnails), "main_widget");
 879                 } else {
 880                         gtk_widget_queue_resize (priv->icon_view);
 881                 }
 882         } else {
 883                 if (priv->icon_view) {
 884                         gtk_container_remove (GTK_CONTAINER (priv->swindow), priv->icon_view);
 885                         priv->icon_view = NULL;
 886                 }
 887
 888                 if (! priv->tree_view) {
 889                         ev_sidebar_init_tree_view (sidebar_thumbnails);
 890                         g_object_notify (G_OBJECT (sidebar_thumbnails), "main_widget");
 891                 }
 892         }
 893
 894         /* Connect to the signal and trigger a fake callback */
 895         g_signal_connect_swapped (priv->model, "page-changed",
 896                                   G_CALLBACK (page_changed_cb),
 897                                   sidebar_thumbnails);
 898         g_signal_connect (priv->model, "notify::rotation",
 899                           G_CALLBACK (ev_sidebar_thumbnails_rotation_changed_cb),
 900                           sidebar_thumbnails);
 901         g_signal_connect (priv->model, "notify::inverted-colors",
 902                           G_CALLBACK (ev_sidebar_thumbnails_inverted_colors_changed_cb),
 903                           sidebar_thumbnails);
 904         sidebar_thumbnails->priv->start_page = -1;
 905         sidebar_thumbnails->priv->end_page = -1;
 906         ev_sidebar_thumbnails_set_current_page (sidebar_thumbnails,
 907                                                 ev_document_model_get_page (model));
 908         adjustment_changed_cb (sidebar_thumbnails);
 909 }
 910
 911 static void
 912 ev_sidebar_thumbnails_set_model (EvSidebarPage   *sidebar_page,
 913                                  EvDocumentModel *model)
 914 {
 915         EvSidebarThumbnails *sidebar_thumbnails = EV_SIDEBAR_THUMBNAILS (sidebar_page);
 916         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 917
 918         if (priv->model == model)
 919                 return;
 920
 921         priv->model = model;
 922         g_signal_connect (model, "notify::document",
 923                           G_CALLBACK (ev_sidebar_thumbnails_document_changed_cb),
 924                           sidebar_page);
 925 }
 926
 927 static gboolean
 928 ev_sidebar_thumbnails_clear_job (GtkTreeModel *model,
 929                                  GtkTreePath *path,
 930                                  GtkTreeIter *iter,
 931                                  gpointer data)
 932 {
 933         EvJob *job;
 934
 935         gtk_tree_model_get (model, iter, COLUMN_JOB, &job, -1);
 936
 937         if (job != NULL) {
 938                 ev_job_cancel (job);
 939                 g_signal_handlers_disconnect_by_func (job, thumbnail_job_completed_callback, data);
 940                 g_object_unref (job);
 941         }
 942
 943         return FALSE;
 944 }
 945
 946 static void
 947 ev_sidebar_thumbnails_clear_model (EvSidebarThumbnails *sidebar_thumbnails)
 948 {
 949         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 950
 951         gtk_tree_model_foreach (GTK_TREE_MODEL (priv->list_store), ev_sidebar_thumbnails_clear_job, sidebar_thumbnails);
 952         gtk_list_store_clear (priv->list_store);
 953 }
 954
 955 static gboolean
 956 ev_sidebar_thumbnails_support_document (EvSidebarPage   *sidebar_page,
 957                                         EvDocument *document)
 958 {
 959         return (EV_IS_DOCUMENT_THUMBNAILS (document));
 960 }
 961
 962 static const gchar*
 963 ev_sidebar_thumbnails_get_label (EvSidebarPage *sidebar_page)
 964 {
 965         return _("Thumbnails");
 966 }
 967
 968 static void
 969 ev_sidebar_thumbnails_page_iface_init (EvSidebarPageIface *iface)
 970 {
 971         iface->support_document = ev_sidebar_thumbnails_support_document;
 972         iface->set_model = ev_sidebar_thumbnails_set_model;
 973         iface->get_label = ev_sidebar_thumbnails_get_label;
 974 }