shell/ev-sidebar-thumbnails.c

   1 /* this file is part of evince, a gnome document viewer
   2  *
   3  *  Copyright (C) 2004 Red Hat, Inc.
   4  *  Copyright (C) 2004, 2005 Anders Carlsson <andersca@gnome.org>
   5  *
   6  *  Authors:
   7  *    Jonathan Blandford <jrb@alum.mit.edu>
   8  *    Anders Carlsson <andersca@gnome.org>
   9  *
  10  * Evince is free software; you can redistribute it and/or modify it
  11  * under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * Evince is distributed in the hope that it will be useful, but
  16  * WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  18  * General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
  23  */
  24
  25 #ifdef HAVE_CONFIG_H
  26 #include "config.h"
  27 #endif
  28
  29 #include <string.h>
  30
  31 #include <glib/gi18n.h>
  32 #include <gtk/gtk.h>
  33
  34 #include "ev-document-misc.h"
  35 #include "ev-document-thumbnails.h"
  36 #include "ev-job-scheduler.h"
  37 #include "ev-sidebar-page.h"
  38 #include "ev-sidebar-thumbnails.h"
  39 #include "ev-utils.h"
  40 #include "ev-window.h"
  41
  42 #define THUMBNAIL_WIDTH 100
  43
  44 /* The IconView doesn't scale nearly as well as the TreeView, so we arbitrarily
  45  * limit its use */
  46 #define MAX_ICON_VIEW_PAGE_COUNT 1500
  47
  48 typedef struct _EvThumbsSize
  49 {
  50         gint width;
  51         gint height;
  52 } EvThumbsSize;
  53
  54 typedef struct _EvThumbsSizeCache {
  55         gboolean uniform;
  56         gint uniform_width;
  57         gint uniform_height;
  58         EvThumbsSize *sizes;
  59 } EvThumbsSizeCache;
  60
  61 struct _EvSidebarThumbnailsPrivate {
  62         GtkWidget *swindow;
  63         GtkWidget *icon_view;
  64         GtkWidget *tree_view;
  65         GtkAdjustment *vadjustment;
  66         GtkListStore *list_store;
  67         GHashTable *loading_icons;
  68         EvDocument *document;
  69         EvDocumentModel *model;
  70         EvThumbsSizeCache *size_cache;
  71
  72         gint n_pages, pages_done;
  73
  74         int rotation;
  75
  76         /* Visible pages */
  77         gint start_page, end_page;
  78 };
  79
  80 enum {
  81         COLUMN_PAGE_STRING,
  82         COLUMN_PIXBUF,
  83         COLUMN_THUMBNAIL_SET,
  84         COLUMN_JOB,
  85         NUM_COLUMNS
  86 };
  87
  88 enum {
  89         PROP_0,
  90         PROP_WIDGET,
  91 };
  92
  93 static void         ev_sidebar_thumbnails_clear_model      (EvSidebarThumbnails *sidebar);
  94 static gboolean     ev_sidebar_thumbnails_support_document (EvSidebarPage       *sidebar_page,
  95                                                             EvDocument          *document);
  96 static void         ev_sidebar_thumbnails_page_iface_init  (EvSidebarPageIface  *iface);
  97 static const gchar* ev_sidebar_thumbnails_get_label        (EvSidebarPage       *sidebar_page);
  98 static void         thumbnail_job_completed_callback       (EvJobThumbnail      *job,
  99                                                             EvSidebarThumbnails *sidebar_thumbnails);
 100 static void         adjustment_changed_cb                  (EvSidebarThumbnails *sidebar_thumbnails);
 101
 102 G_DEFINE_TYPE_EXTENDED (EvSidebarThumbnails,
 103                         ev_sidebar_thumbnails,
 104                         GTK_TYPE_VBOX,
 105                         0,
 106                         G_IMPLEMENT_INTERFACE (EV_TYPE_SIDEBAR_PAGE,
 107                                                ev_sidebar_thumbnails_page_iface_init))
 108
 109 #define EV_SIDEBAR_THUMBNAILS_GET_PRIVATE(object) \
 110         (G_TYPE_INSTANCE_GET_PRIVATE ((object), EV_TYPE_SIDEBAR_THUMBNAILS, EvSidebarThumbnailsPrivate));
 111
 112 /* Thumbnails dimensions cache */
 113 #define EV_THUMBNAILS_SIZE_CACHE_KEY "ev-thumbnails-size-cache"
 114
 115 static EvThumbsSizeCache *
 116 ev_thumbnails_size_cache_new (EvDocument *document)
 117 {
 118         EvThumbsSizeCache *cache;
 119         EvRenderContext *rc;
 120         gint i, n_pages;
 121         EvThumbsSize *thumb_size;
 122
 123         cache = g_new0 (EvThumbsSizeCache, 1);
 124
 125         n_pages = ev_document_get_n_pages (document);
 126
 127         /* Assume all pages are the same size until proven otherwise */
 128         cache->uniform = TRUE;
 129
 130         for (i = 0; i < n_pages; i++) {
 131                 EvPage *page;
 132                 gdouble page_width, page_height;
 133                 gint    thumb_width = 0;
 134                 gint    thumb_height = 0;
 135
 136                 page = ev_document_get_page (document, i);
 137
 138                 ev_document_get_page_size (document, i, &page_width, &page_height);
 139
 140                 if (!rc) {
 141                         rc = ev_render_context_new (page, 0, (gdouble)THUMBNAIL_WIDTH / page_width);
 142                 } else {
 143                         ev_render_context_set_page (rc, page);
 144                         ev_render_context_set_scale (rc, (gdouble)THUMBNAIL_WIDTH / page_width);
 145                 }
 146
 147                 ev_document_thumbnails_get_dimensions (EV_DOCUMENT_THUMBNAILS (document),
 148                                                        rc, &thumb_width, &thumb_height);
 149
 150                 if (i == 0) {
 151                         cache->uniform_width = thumb_width;
 152                         cache->uniform_height = thumb_height;
 153                 } else if (cache->uniform &&
 154                            (cache->uniform_width != thumb_width ||
 155                             cache->uniform_height != thumb_height)) {
 156                         /* It's a different thumbnail size.  Backfill the array. */
 157                         int j;
 158
 159                         cache->sizes = g_new0 (EvThumbsSize, n_pages);
 160
 161                         for (j = 0; j < i; j++) {
 162                                 thumb_size = &(cache->sizes[j]);
 163                                 thumb_size->width = cache->uniform_width;
 164                                 thumb_size->height = cache->uniform_height;
 165                         }
 166                         cache->uniform = FALSE;
 167                 }
 168
 169                 if (! cache->uniform) {
 170                         thumb_size = &(cache->sizes[i]);
 171
 172                         thumb_size->width = thumb_width;
 173                         thumb_size->height = thumb_height;
 174                 }
 175
 176                 g_object_unref (page);
 177         }
 178
 179         if (rc) {
 180                 g_object_unref (rc);
 181         }
 182
 183         return cache;
 184 }
 185
 186 static void
 187 ev_thumbnails_size_cache_get_size (EvThumbsSizeCache *cache,
 188                                    gint               page,
 189                                    gint               rotation,
 190                                    gint              *width,
 191                                    gint              *height)
 192 {
 193         gint w, h;
 194
 195         if (cache->uniform) {
 196                 w = cache->uniform_width;
 197                 h = cache->uniform_height;
 198         } else {
 199                 EvThumbsSize *thumb_size;
 200
 201                 thumb_size = &(cache->sizes[page]);
 202
 203                 w = thumb_size->width;
 204                 h = thumb_size->height;
 205         }
 206
 207         if (rotation == 0 || rotation == 180) {
 208                 if (width) *width = w;
 209                 if (height) *height = h;
 210         } else {
 211                 if (width) *width = h;
 212                 if (height) *height = w;
 213         }
 214 }
 215
 216 static void
 217 ev_thumbnails_size_cache_free (EvThumbsSizeCache *cache)
 218 {
 219         if (cache->sizes) {
 220                 g_free (cache->sizes);
 221                 cache->sizes = NULL;
 222         }
 223
 224         g_free (cache);
 225 }
 226
 227 static EvThumbsSizeCache *
 228 ev_thumbnails_size_cache_get (EvDocument *document)
 229 {
 230         EvThumbsSizeCache *cache;
 231
 232         cache = g_object_get_data (G_OBJECT (document), EV_THUMBNAILS_SIZE_CACHE_KEY);
 233         if (!cache) {
 234                 cache = ev_thumbnails_size_cache_new (document);
 235                 g_object_set_data_full (G_OBJECT (document),
 236                                         EV_THUMBNAILS_SIZE_CACHE_KEY,
 237                                         cache,
 238                                         (GDestroyNotify)ev_thumbnails_size_cache_free);
 239         }
 240
 241         return cache;
 242 }
 243
 244
 245 static void
 246 ev_sidebar_thumbnails_dispose (GObject *object)
 247 {
 248         EvSidebarThumbnails *sidebar_thumbnails = EV_SIDEBAR_THUMBNAILS (object);
 249
 250         if (sidebar_thumbnails->priv->loading_icons) {
 251                 g_hash_table_destroy (sidebar_thumbnails->priv->loading_icons);
 252                 sidebar_thumbnails->priv->loading_icons = NULL;
 253         }
 254
 255         if (sidebar_thumbnails->priv->list_store) {
 256                 ev_sidebar_thumbnails_clear_model (sidebar_thumbnails);
 257                 g_object_unref (sidebar_thumbnails->priv->list_store);
 258                 sidebar_thumbnails->priv->list_store = NULL;
 259         }
 260
 261         G_OBJECT_CLASS (ev_sidebar_thumbnails_parent_class)->dispose (object);
 262 }
 263
 264 static void
 265 ev_sidebar_thumbnails_get_property (GObject    *object,
 266                                     guint       prop_id,
 267                                     GValue     *value,
 268                                     GParamSpec *pspec)
 269 {
 270         EvSidebarThumbnails *sidebar = EV_SIDEBAR_THUMBNAILS (object);
 271
 272         switch (prop_id) {
 273         case PROP_WIDGET:
 274                 if (sidebar->priv->tree_view)
 275                         g_value_set_object (value, sidebar->priv->tree_view);
 276                 else
 277                         g_value_set_object (value, sidebar->priv->icon_view);
 278                 break;
 279         default:
 280                 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 281                 break;
 282         }
 283 }
 284
 285 static void
 286 ev_sidebar_thumbnails_map (GtkWidget *widget)
 287 {
 288         EvSidebarThumbnails *sidebar;
 289
 290         sidebar = EV_SIDEBAR_THUMBNAILS (widget);
 291
 292         GTK_WIDGET_CLASS (ev_sidebar_thumbnails_parent_class)->map (widget);
 293
 294         adjustment_changed_cb (sidebar);
 295 }
 296
 297 static void
 298 ev_sidebar_thumbnails_class_init (EvSidebarThumbnailsClass *ev_sidebar_thumbnails_class)
 299 {
 300         GObjectClass *g_object_class;
 301         GtkObjectClass *gtk_object_class;
 302         GtkWidgetClass *widget_class;
 303
 304         g_object_class = G_OBJECT_CLASS (ev_sidebar_thumbnails_class);
 305         gtk_object_class = GTK_OBJECT_CLASS (ev_sidebar_thumbnails_class);
 306         widget_class = GTK_WIDGET_CLASS (ev_sidebar_thumbnails_class);
 307
 308         g_object_class->dispose = ev_sidebar_thumbnails_dispose;
 309         g_object_class->get_property = ev_sidebar_thumbnails_get_property;
 310         widget_class->map = ev_sidebar_thumbnails_map;
 311
 312         g_object_class_override_property (g_object_class,
 313                                           PROP_WIDGET,
 314                                           "main-widget");
 315
 316         g_type_class_add_private (g_object_class, sizeof (EvSidebarThumbnailsPrivate));
 317 }
 318
 319 GtkWidget *
 320 ev_sidebar_thumbnails_new (void)
 321 {
 322         GtkWidget *ev_sidebar_thumbnails;
 323
 324         ev_sidebar_thumbnails = g_object_new (EV_TYPE_SIDEBAR_THUMBNAILS, NULL);
 325
 326         return ev_sidebar_thumbnails;
 327 }
 328
 329 static GdkPixbuf *
 330 ev_sidebar_thumbnails_get_loading_icon (EvSidebarThumbnails *sidebar_thumbnails,
 331                                         gint                 width,
 332                                         gint                 height)
 333 {
 334         GdkPixbuf *icon;
 335         gchar     *key;
 336
 337         key = g_strdup_printf ("%dx%d", width, height);
 338         icon = g_hash_table_lookup (sidebar_thumbnails->priv->loading_icons, key);
 339         if (!icon) {
 340                 icon = ev_document_misc_get_thumbnail_frame (width, height, NULL);
 341                 g_hash_table_insert (sidebar_thumbnails->priv->loading_icons,
 342                                      key, icon);
 343         } else {
 344                 g_free (key);
 345         }
 346
 347         return icon;
 348 }
 349
 350 static void
 351 clear_range (EvSidebarThumbnails *sidebar_thumbnails,
 352              gint                 start_page,
 353              gint                 end_page)
 354 {
 355         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 356         GtkTreePath *path;
 357         GtkTreeIter iter;
 358         gboolean result;
 359         gint prev_width = -1;
 360         gint prev_height = -1;
 361
 362         g_assert (start_page <= end_page);
 363
 364         path = gtk_tree_path_new_from_indices (start_page, -1);
 365         for (result = gtk_tree_model_get_iter (GTK_TREE_MODEL (priv->list_store), &iter, path);
 366              result && start_page <= end_page;
 367              result = gtk_tree_model_iter_next (GTK_TREE_MODEL (priv->list_store), &iter), start_page ++) {
 368                 EvJobThumbnail *job;
 369                 GdkPixbuf *loading_icon = NULL;
 370                 gint width, height;
 371
 372                 gtk_tree_model_get (GTK_TREE_MODEL (priv->list_store),
 373                                     &iter,
 374                                     COLUMN_JOB, &job,
 375                                     -1);
 376
 377                 if (job) {
 378                         g_signal_handlers_disconnect_by_func (job, thumbnail_job_completed_callback, sidebar_thumbnails);
 379                         ev_job_cancel (EV_JOB (job));
 380                         g_object_unref (job);
 381                 }
 382
 383                 ev_thumbnails_size_cache_get_size (priv->size_cache, start_page,
 384                                                   priv->rotation,
 385                                                   &width, &height);
 386                 if (!loading_icon || (width != prev_width && height != prev_height)) {
 387                         loading_icon =
 388                                 ev_sidebar_thumbnails_get_loading_icon (sidebar_thumbnails,
 389                                                                         width, height);
 390                 }
 391
 392                 prev_width = width;
 393                 prev_height = height;
 394
 395                 gtk_list_store_set (priv->list_store, &iter,
 396                                     COLUMN_JOB, NULL,
 397                                     COLUMN_THUMBNAIL_SET, FALSE,
 398                                     COLUMN_PIXBUF, loading_icon,
 399                                     -1);
 400         }
 401         gtk_tree_path_free (path);
 402 }
 403
 404 static gdouble
 405 get_scale_for_page (EvSidebarThumbnails *sidebar_thumbnails,
 406                     gint                 page)
 407 {
 408         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 409         gdouble width;
 410
 411         ev_document_get_page_size (priv->document, page, &width, NULL);
 412
 413         return (gdouble)THUMBNAIL_WIDTH / width;
 414 }
 415
 416 static void
 417 add_range (EvSidebarThumbnails *sidebar_thumbnails,
 418            gint                 start_page,
 419            gint                 end_page)
 420 {
 421         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 422         GtkTreePath *path;
 423         GtkTreeIter iter;
 424         gboolean result;
 425         gint page = start_page;
 426
 427         g_assert (start_page <= end_page);
 428
 429         path = gtk_tree_path_new_from_indices (start_page, -1);
 430         for (result = gtk_tree_model_get_iter (GTK_TREE_MODEL (priv->list_store), &iter, path);
 431              result && page <= end_page;
 432              result = gtk_tree_model_iter_next (GTK_TREE_MODEL (priv->list_store), &iter), page ++) {
 433                 EvJob *job;
 434                 gboolean thumbnail_set;
 435
 436                 gtk_tree_model_get (GTK_TREE_MODEL (priv->list_store), &iter,
 437                                     COLUMN_JOB, &job,
 438                                     COLUMN_THUMBNAIL_SET, &thumbnail_set,
 439                                     -1);
 440
 441                 if (job == NULL && !thumbnail_set) {
 442                         job = ev_job_thumbnail_new (priv->document,
 443                                                     page, priv->rotation,
 444                                                     get_scale_for_page (sidebar_thumbnails, page));
 445                         ev_job_scheduler_push_job (EV_JOB (job), EV_JOB_PRIORITY_HIGH);
 446
 447                         g_object_set_data_full (G_OBJECT (job), "tree_iter",
 448                                                 gtk_tree_iter_copy (&iter),
 449                                                 (GDestroyNotify) gtk_tree_iter_free);
 450                         g_signal_connect (job, "finished",
 451                                           G_CALLBACK (thumbnail_job_completed_callback),
 452                                           sidebar_thumbnails);
 453                         gtk_list_store_set (priv->list_store, &iter,
 454                                             COLUMN_JOB, job,
 455                                             -1);
 456
 457                         /* The queue and the list own a ref to the job now */
 458                         g_object_unref (job);
 459                 } else if (job) {
 460                         g_object_unref (job);
 461                 }
 462         }
 463         gtk_tree_path_free (path);
 464 }
 465
 466 /* This modifies start */
 467 static void
 468 update_visible_range (EvSidebarThumbnails *sidebar_thumbnails,
 469                       gint                 start_page,
 470                       gint                 end_page)
 471 {
 472         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 473         int old_start_page, old_end_page;
 474
 475         old_start_page = priv->start_page;
 476         old_end_page = priv->end_page;
 477
 478         if (start_page == old_start_page &&
 479             end_page == old_end_page)
 480                 return;
 481
 482         /* Clear the areas we no longer display */
 483         if (old_start_page >= 0 && old_start_page < start_page)
 484                 clear_range (sidebar_thumbnails, old_start_page, MIN (start_page - 1, old_end_page));
 485
 486         if (old_end_page > 0 && old_end_page > end_page)
 487                 clear_range (sidebar_thumbnails, MAX (end_page + 1, old_start_page), old_end_page);
 488
 489         add_range (sidebar_thumbnails, start_page, end_page);
 490
 491         priv->start_page = start_page;
 492         priv->end_page = end_page;
 493 }
 494
 495 static void
 496 adjustment_changed_cb (EvSidebarThumbnails *sidebar_thumbnails)
 497 {
 498         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 499         GtkTreePath *path = NULL;
 500         GtkTreePath *path2 = NULL;
 501         gint wy1;
 502         gint wy2;
 503
 504         /* Widget is not currently visible */
 505         if (!GTK_WIDGET_MAPPED (sidebar_thumbnails))
 506                 return;
 507
 508         if (priv->vadjustment->page_size == 0)
 509                 return;
 510
 511         if (priv->tree_view) {
 512                 if (! GTK_WIDGET_REALIZED (priv->tree_view))
 513                         return;
 514
 515                 gtk_tree_view_convert_tree_to_bin_window_coords (GTK_TREE_VIEW (priv->tree_view),
 516                                                                  0, (int) priv->vadjustment->value,
 517                                                                  NULL, &wy1);
 518                 gtk_tree_view_convert_tree_to_bin_window_coords (GTK_TREE_VIEW (priv->tree_view),
 519                                                                  0, (int) (priv->vadjustment->value + priv->vadjustment->page_size),
 520                                                                  NULL, &wy2);
 521                 gtk_tree_view_get_path_at_pos (GTK_TREE_VIEW (priv->tree_view),
 522                                                1, wy1 + 1, &path,
 523                                                NULL, NULL, NULL);
 524                 gtk_tree_view_get_path_at_pos (GTK_TREE_VIEW (priv->tree_view),
 525                                                1, wy2 -1, &path2,
 526                                                NULL, NULL, NULL);
 527         } else if (priv->icon_view) {
 528                 if (! GTK_WIDGET_REALIZED (priv->icon_view))
 529                         return;
 530                 if (! gtk_icon_view_get_visible_range (GTK_ICON_VIEW (priv->icon_view), &path, &path2))
 531                         return;
 532         } else {
 533                 return;
 534         }
 535
 536         if (path && path2) {
 537                 update_visible_range (sidebar_thumbnails,
 538                                       gtk_tree_path_get_indices (path)[0],
 539                                       gtk_tree_path_get_indices (path2)[0]);
 540         }
 541
 542         gtk_tree_path_free (path);
 543         gtk_tree_path_free (path2);
 544 }
 545
 546 static void
 547 ev_sidebar_thumbnails_fill_model (EvSidebarThumbnails *sidebar_thumbnails)
 548 {
 549         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 550         GtkTreeIter iter;
 551         int i;
 552         gint prev_width = -1;
 553         gint prev_height = -1;
 554
 555         for (i = 0; i < sidebar_thumbnails->priv->n_pages; i++) {
 556                 gchar     *page_label;
 557                 gchar     *page_string;
 558                 GdkPixbuf *loading_icon = NULL;
 559                 gint       width, height;
 560
 561                 page_label = ev_document_get_page_label (priv->document, i);
 562                 page_string = g_markup_printf_escaped ("<i>%s</i>", page_label);
 563                 ev_thumbnails_size_cache_get_size (sidebar_thumbnails->priv->size_cache, i,
 564                                                   sidebar_thumbnails->priv->rotation,
 565                                                   &width, &height);
 566                 if (!loading_icon || (width != prev_width && height != prev_height)) {
 567                         loading_icon =
 568                                 ev_sidebar_thumbnails_get_loading_icon (sidebar_thumbnails,
 569                                                                         width, height);
 570                 }
 571
 572                 prev_width = width;
 573                 prev_height = height;
 574
 575                 gtk_list_store_append (priv->list_store, &iter);
 576                 gtk_list_store_set (priv->list_store, &iter,
 577                                     COLUMN_PAGE_STRING, page_string,
 578                                     COLUMN_PIXBUF, loading_icon,
 579                                     COLUMN_THUMBNAIL_SET, FALSE,
 580                                     -1);
 581                 g_free (page_label);
 582                 g_free (page_string);
 583         }
 584 }
 585
 586 static void
 587 ev_sidebar_tree_selection_changed (GtkTreeSelection *selection,
 588                                    EvSidebarThumbnails *ev_sidebar_thumbnails)
 589 {
 590         EvSidebarThumbnailsPrivate *priv = ev_sidebar_thumbnails->priv;
 591         GtkTreePath *path;
 592         GtkTreeIter iter;
 593         int page;
 594
 595         if (!gtk_tree_selection_get_selected (selection, NULL, &iter))
 596                 return;
 597
 598         path = gtk_tree_model_get_path (GTK_TREE_MODEL (priv->list_store),
 599                                         &iter);
 600         page = gtk_tree_path_get_indices (path)[0];
 601         gtk_tree_path_free (path);
 602
 603         ev_document_model_set_page (priv->model, page);
 604 }
 605
 606 static void
 607 ev_sidebar_icon_selection_changed (GtkIconView         *icon_view,
 608                                    EvSidebarThumbnails *ev_sidebar_thumbnails)
 609 {
 610         EvSidebarThumbnailsPrivate *priv = ev_sidebar_thumbnails->priv;
 611         GtkTreePath *path;
 612         GList *selected;
 613         int page;
 614
 615         selected = gtk_icon_view_get_selected_items (icon_view);
 616         if (selected == NULL)
 617                 return;
 618
 619         /* We don't handle or expect multiple selection. */
 620         g_assert (selected->next == NULL);
 621
 622         path = selected->data;
 623         page = gtk_tree_path_get_indices (path)[0];
 624
 625         gtk_tree_path_free (path);
 626         g_list_free (selected);
 627
 628         ev_document_model_set_page (priv->model, page);
 629 }
 630
 631 static void
 632 ev_sidebar_init_tree_view (EvSidebarThumbnails *ev_sidebar_thumbnails)
 633 {
 634         EvSidebarThumbnailsPrivate *priv;
 635         GtkTreeSelection *selection;
 636         GtkCellRenderer *renderer;
 637
 638         priv = ev_sidebar_thumbnails->priv;
 639         priv->tree_view = gtk_tree_view_new_with_model (GTK_TREE_MODEL (priv->list_store));
 640
 641         selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (priv->tree_view));
 642         g_signal_connect (selection, "changed",
 643                           G_CALLBACK (ev_sidebar_tree_selection_changed), ev_sidebar_thumbnails);
 644         gtk_tree_view_set_headers_visible (GTK_TREE_VIEW (priv->tree_view), FALSE);
 645         renderer = g_object_new (GTK_TYPE_CELL_RENDERER_PIXBUF,
 646                                  "xpad", 2,
 647                                  "ypad", 2,
 648                                  NULL);
 649         gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (priv->tree_view), -1,
 650                                                      NULL, renderer,
 651                                                      "pixbuf", 1,
 652                                                      NULL);
 653         gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (priv->tree_view), -1,
 654                                                      NULL, gtk_cell_renderer_text_new (),
 655                                                      "markup", 0, NULL);
 656         gtk_container_add (GTK_CONTAINER (priv->swindow), priv->tree_view);
 657         gtk_widget_show (priv->tree_view);
 658 }
 659
 660 static void
 661 ev_sidebar_init_icon_view (EvSidebarThumbnails *ev_sidebar_thumbnails)
 662 {
 663         EvSidebarThumbnailsPrivate *priv;
 664
 665         priv = ev_sidebar_thumbnails->priv;
 666
 667         priv->icon_view = gtk_icon_view_new_with_model (GTK_TREE_MODEL (priv->list_store));
 668         gtk_icon_view_set_markup_column (GTK_ICON_VIEW (priv->icon_view), 0);
 669         gtk_icon_view_set_pixbuf_column (GTK_ICON_VIEW (priv->icon_view), 1);
 670         g_signal_connect (priv->icon_view, "selection-changed",
 671                           G_CALLBACK (ev_sidebar_icon_selection_changed), ev_sidebar_thumbnails);
 672
 673         gtk_container_add (GTK_CONTAINER (priv->swindow), priv->icon_view);
 674         gtk_widget_show (priv->icon_view);
 675 }
 676
 677 static gboolean
 678 ev_sidebar_thumbnails_use_icon_view (EvSidebarThumbnails *sidebar_thumbnails)
 679 {
 680         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 681
 682         return (ev_document_get_n_pages (priv->document) <= MAX_ICON_VIEW_PAGE_COUNT);
 683 }
 684
 685 static void
 686 ev_sidebar_thumbnails_init (EvSidebarThumbnails *ev_sidebar_thumbnails)
 687 {
 688         EvSidebarThumbnailsPrivate *priv;
 689
 690         priv = ev_sidebar_thumbnails->priv = EV_SIDEBAR_THUMBNAILS_GET_PRIVATE (ev_sidebar_thumbnails);
 691
 692         priv->list_store = gtk_list_store_new (NUM_COLUMNS,
 693                                                G_TYPE_STRING,
 694                                                GDK_TYPE_PIXBUF,
 695                                                G_TYPE_BOOLEAN,
 696                                                EV_TYPE_JOB_THUMBNAIL);
 697
 698         priv->swindow = gtk_scrolled_window_new (NULL, NULL);
 699
 700         /* We actually don't want GTK_POLICY_AUTOMATIC for horizontal scrollbar here
 701          * it's just a workaround for bug #449462
 702          */
 703         gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (priv->swindow),
 704                                         GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);
 705         gtk_scrolled_window_set_shadow_type (GTK_SCROLLED_WINDOW (priv->swindow),
 706                                              GTK_SHADOW_IN);
 707         priv->vadjustment = gtk_scrolled_window_get_vadjustment (GTK_SCROLLED_WINDOW (priv->swindow));
 708         g_signal_connect_data (priv->vadjustment, "value-changed",
 709                                G_CALLBACK (adjustment_changed_cb),
 710                                ev_sidebar_thumbnails, NULL,
 711                                G_CONNECT_SWAPPED | G_CONNECT_AFTER);
 712         g_signal_connect_swapped (priv->swindow, "size-allocate",
 713                                   G_CALLBACK (adjustment_changed_cb),
 714                                   ev_sidebar_thumbnails);
 715         gtk_box_pack_start (GTK_BOX (ev_sidebar_thumbnails), priv->swindow, TRUE, TRUE, 0);
 716
 717         /* Put it all together */
 718         gtk_widget_show_all (priv->swindow);
 719 }
 720
 721 static void
 722 ev_sidebar_thumbnails_set_current_page (EvSidebarThumbnails *sidebar,
 723                                         gint                 page)
 724 {
 725         GtkTreeView *tree_view;
 726         GtkTreePath *path;
 727
 728         path = gtk_tree_path_new_from_indices (page, -1);
 729
 730         if (sidebar->priv->tree_view) {
 731                 tree_view = GTK_TREE_VIEW (sidebar->priv->tree_view);
 732                 gtk_tree_view_set_cursor (tree_view, path, NULL, FALSE);
 733                 gtk_tree_view_scroll_to_cell (tree_view, path, NULL, FALSE, 0.0, 0.0);
 734         } else if (sidebar->priv->icon_view) {
 735
 736                 g_signal_handlers_block_by_func
 737                         (sidebar->priv->icon_view,
 738                          G_CALLBACK (ev_sidebar_icon_selection_changed), sidebar);
 739
 740                 gtk_icon_view_select_path (GTK_ICON_VIEW (sidebar->priv->icon_view), path);
 741
 742                 g_signal_handlers_unblock_by_func
 743                         (sidebar->priv->icon_view,
 744                          G_CALLBACK (ev_sidebar_icon_selection_changed), sidebar);
 745
 746                 gtk_icon_view_set_cursor (GTK_ICON_VIEW (sidebar->priv->icon_view), path, NULL, FALSE);
 747         }
 748
 749         gtk_tree_path_free (path);
 750 }
 751
 752 static void
 753 page_changed_cb (EvSidebarThumbnails *sidebar,
 754                  gint                 old_page,
 755                  gint                 new_page)
 756 {
 757         ev_sidebar_thumbnails_set_current_page (sidebar, new_page);
 758 }
 759
 760 static gboolean
 761 refresh (EvSidebarThumbnails *sidebar_thumbnails)
 762 {
 763         adjustment_changed_cb (sidebar_thumbnails);
 764         return FALSE;
 765 }
 766
 767 static void
 768 ev_sidebar_thumbnails_rotation_changed_cb (EvDocumentModel     *model,
 769                                            GParamSpec          *pspec,
 770                                            EvSidebarThumbnails *sidebar_thumbnails)
 771 {
 772         gint rotation = ev_document_model_get_rotation (model);
 773
 774         sidebar_thumbnails->priv->rotation = rotation;
 775         if (sidebar_thumbnails->priv->loading_icons)
 776                 g_hash_table_remove_all (sidebar_thumbnails->priv->loading_icons);
 777
 778         if (sidebar_thumbnails->priv->document == NULL ||
 779             sidebar_thumbnails->priv->n_pages <= 0)
 780                 return;
 781
 782         ev_sidebar_thumbnails_clear_model (sidebar_thumbnails);
 783         ev_sidebar_thumbnails_fill_model (sidebar_thumbnails);
 784
 785         /* Trigger a redraw */
 786         sidebar_thumbnails->priv->start_page = -1;
 787         sidebar_thumbnails->priv->end_page = -1;
 788         g_idle_add ((GSourceFunc)refresh, sidebar_thumbnails);
 789 }
 790
 791 static void
 792 thumbnail_job_completed_callback (EvJobThumbnail      *job,
 793                                   EvSidebarThumbnails *sidebar_thumbnails)
 794 {
 795         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 796         GtkTreeIter *iter;
 797
 798         iter = (GtkTreeIter *) g_object_get_data (G_OBJECT (job), "tree_iter");
 799         gtk_list_store_set (priv->list_store,
 800                             iter,
 801                             COLUMN_PIXBUF, job->thumbnail,
 802                             COLUMN_THUMBNAIL_SET, TRUE,
 803                             COLUMN_JOB, NULL,
 804                             -1);
 805 }
 806
 807 static void
 808 ev_sidebar_thumbnails_document_changed_cb (EvDocumentModel     *model,
 809                                            GParamSpec          *pspec,
 810                                            EvSidebarThumbnails *sidebar_thumbnails)
 811 {
 812         EvDocument *document = ev_document_model_get_document (model);
 813         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 814
 815         if (!EV_IS_DOCUMENT_THUMBNAILS (document) ||
 816             ev_document_get_n_pages (document) <= 0 ||
 817             !ev_document_check_dimensions (document)) {
 818                 return;
 819         }
 820
 821         priv->size_cache = ev_thumbnails_size_cache_get (document);
 822         priv->document = document;
 823         priv->n_pages = ev_document_get_n_pages (document);
 824         priv->rotation = ev_document_model_get_rotation (model);
 825         priv->loading_icons = g_hash_table_new_full (g_str_hash,
 826                                                      g_str_equal,
 827                                                      (GDestroyNotify)g_free,
 828                                                      (GDestroyNotify)g_object_unref);
 829
 830         ev_sidebar_thumbnails_clear_model (sidebar_thumbnails);
 831         ev_sidebar_thumbnails_fill_model (sidebar_thumbnails);
 832
 833         /* Create the view widget, and remove the old one, if needed */
 834         if (ev_sidebar_thumbnails_use_icon_view (sidebar_thumbnails)) {
 835                 if (priv->tree_view) {
 836                         gtk_container_remove (GTK_CONTAINER (priv->swindow), priv->tree_view);
 837                         priv->tree_view = NULL;
 838                 }
 839
 840                 if (! priv->icon_view) {
 841                         ev_sidebar_init_icon_view (sidebar_thumbnails);
 842                         g_object_notify (G_OBJECT (sidebar_thumbnails), "main_widget");
 843                 } else {
 844                         gtk_widget_queue_resize (priv->icon_view);
 845                 }
 846         } else {
 847                 if (priv->icon_view) {
 848                         gtk_container_remove (GTK_CONTAINER (priv->swindow), priv->icon_view);
 849                         priv->icon_view = NULL;
 850                 }
 851
 852                 if (! priv->tree_view) {
 853                         ev_sidebar_init_tree_view (sidebar_thumbnails);
 854                         g_object_notify (G_OBJECT (sidebar_thumbnails), "main_widget");
 855                 }
 856         }
 857
 858         /* Connect to the signal and trigger a fake callback */
 859         g_signal_connect_swapped (priv->model, "page-changed",
 860                                   G_CALLBACK (page_changed_cb),
 861                                   sidebar_thumbnails);
 862         g_signal_connect (priv->model, "notify::rotation",
 863                           G_CALLBACK (ev_sidebar_thumbnails_rotation_changed_cb),
 864                           sidebar_thumbnails);
 865         sidebar_thumbnails->priv->start_page = -1;
 866         sidebar_thumbnails->priv->end_page = -1;
 867         ev_sidebar_thumbnails_set_current_page (sidebar_thumbnails,
 868                                                 ev_document_model_get_page (model));
 869         adjustment_changed_cb (sidebar_thumbnails);
 870 }
 871
 872 static void
 873 ev_sidebar_thumbnails_set_model (EvSidebarPage   *sidebar_page,
 874                                  EvDocumentModel *model)
 875 {
 876         EvSidebarThumbnails *sidebar_thumbnails = EV_SIDEBAR_THUMBNAILS (sidebar_page);
 877         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 878
 879         if (priv->model == model)
 880                 return;
 881
 882         priv->model = model;
 883         g_signal_connect (model, "notify::document",
 884                           G_CALLBACK (ev_sidebar_thumbnails_document_changed_cb),
 885                           sidebar_page);
 886 }
 887
 888 static gboolean
 889 ev_sidebar_thumbnails_clear_job (GtkTreeModel *model,
 890                                  GtkTreePath *path,
 891                                  GtkTreeIter *iter,
 892                                  gpointer data)
 893 {
 894         EvJob *job;
 895
 896         gtk_tree_model_get (model, iter, COLUMN_JOB, &job, -1);
 897
 898         if (job != NULL) {
 899                 ev_job_cancel (job);
 900                 g_signal_handlers_disconnect_by_func (job, thumbnail_job_completed_callback, data);
 901                 g_object_unref (job);
 902         }
 903
 904         return FALSE;
 905 }
 906
 907 static void
 908 ev_sidebar_thumbnails_clear_model (EvSidebarThumbnails *sidebar_thumbnails)
 909 {
 910         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 911
 912         gtk_tree_model_foreach (GTK_TREE_MODEL (priv->list_store), ev_sidebar_thumbnails_clear_job, sidebar_thumbnails);
 913         gtk_list_store_clear (priv->list_store);
 914 }
 915
 916 static gboolean
 917 ev_sidebar_thumbnails_support_document (EvSidebarPage   *sidebar_page,
 918                                         EvDocument *document)
 919 {
 920         return (EV_IS_DOCUMENT_THUMBNAILS (document));
 921 }
 922
 923 static const gchar*
 924 ev_sidebar_thumbnails_get_label (EvSidebarPage *sidebar_page)
 925 {
 926         return _("Thumbnails");
 927 }
 928
 929 static void
 930 ev_sidebar_thumbnails_page_iface_init (EvSidebarPageIface *iface)
 931 {
 932         iface->support_document = ev_sidebar_thumbnails_support_document;
 933         iface->set_model = ev_sidebar_thumbnails_set_model;
 934         iface->get_label = ev_sidebar_thumbnails_get_label;
 935 }
 936