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 #include <gtk/gtk.h>
  31
  32 #include "ev-sidebar-thumbnails.h"
  33 #include "ev-document-thumbnails.h"
  34 #include "ev-document-misc.h"
  35 #include "ev-window.h"
  36 #include "ev-utils.h"
  37
  38 #define THUMBNAIL_WIDTH 75
  39 /* Amount of time we devote to each iteration of the idle, in microseconds */
  40 #define IDLE_WORK_LENGTH 5000
  41
  42 struct _EvSidebarThumbnailsPrivate {
  43         GtkWidget *tree_view;
  44         GtkAdjustment *vadjustment;
  45         GtkListStore *list_store;
  46         EvDocument *document;
  47
  48         guint idle_id;
  49         gint current_page, n_pages, pages_done;
  50         GtkTreeIter current_page_iter;
  51 };
  52
  53 enum {
  54         COLUMN_PAGE_STRING,
  55         COLUMN_PIXBUF,
  56         COLUMN_THUMBNAIL_SET,
  57         NUM_COLUMNS
  58 };
  59
  60 static GtkVBoxClass *parent_class;
  61
  62 G_DEFINE_TYPE (EvSidebarThumbnails, ev_sidebar_thumbnails, GTK_TYPE_VBOX);
  63
  64 #define EV_SIDEBAR_THUMBNAILS_GET_PRIVATE(object) \
  65         (G_TYPE_INSTANCE_GET_PRIVATE ((object), EV_TYPE_SIDEBAR_THUMBNAILS, EvSidebarThumbnailsPrivate));
  66
  67 static void
  68 ev_sidebar_thumbnails_destroy (GtkObject *object)
  69 {
  70         EvSidebarThumbnails *ev_sidebar_thumbnails = EV_SIDEBAR_THUMBNAILS (object);
  71         EvSidebarThumbnailsPrivate *priv = ev_sidebar_thumbnails->priv;
  72
  73         if (priv->idle_id != 0) {
  74                 g_source_remove (priv->idle_id);
  75
  76                 priv->idle_id = 0;
  77         }
  78
  79         GTK_OBJECT_CLASS (parent_class)->destroy (object);
  80 }
  81
  82 static void
  83 ev_sidebar_thumbnails_class_init (EvSidebarThumbnailsClass *ev_sidebar_thumbnails_class)
  84 {
  85         GObjectClass *g_object_class;
  86         GtkObjectClass *gtk_object_class;
  87
  88         g_object_class = G_OBJECT_CLASS (ev_sidebar_thumbnails_class);
  89         gtk_object_class = GTK_OBJECT_CLASS (ev_sidebar_thumbnails_class);
  90
  91         parent_class = g_type_class_peek_parent (ev_sidebar_thumbnails_class);
  92
  93         gtk_object_class->destroy = ev_sidebar_thumbnails_destroy;
  94
  95         g_type_class_add_private (g_object_class, sizeof (EvSidebarThumbnailsPrivate));
  96
  97 }
  98
  99 static void
 100 adjustment_changed_cb (GtkAdjustment       *adjustment,
 101                        EvSidebarThumbnails *ev_sidebar_thumbnails)
 102 {
 103         EvSidebarThumbnailsPrivate *priv;
 104         GtkTreePath *path;
 105         GtkTreeIter iter;
 106         int page;
 107         gboolean thumbnail_set;
 108
 109         priv = ev_sidebar_thumbnails->priv = EV_SIDEBAR_THUMBNAILS_GET_PRIVATE (ev_sidebar_thumbnails);
 110
 111         gtk_tree_view_get_path_at_pos (GTK_TREE_VIEW (priv->tree_view),
 112                                        1, 1, &path,
 113                                        NULL, NULL, NULL);
 114         if (!path)
 115                 return;
 116
 117         page = gtk_tree_path_get_indices (path)[0];
 118         if (page == priv->current_page)
 119                 return;
 120         gtk_tree_model_get_iter (GTK_TREE_MODEL (priv->list_store),
 121                                  &iter, path);
 122         gtk_tree_model_get (GTK_TREE_MODEL (priv->list_store), &iter,
 123                             COLUMN_THUMBNAIL_SET, &thumbnail_set,
 124                             -1);
 125         if (! thumbnail_set) {
 126                 priv->current_page = page;
 127                 priv->current_page_iter = iter;
 128
 129         }
 130 }
 131
 132 static void
 133 ev_sidebar_tree_selection_changed (GtkTreeSelection *selection,
 134                                    EvSidebarThumbnails *ev_sidebar_thumbnails)
 135 {
 136         EvSidebarThumbnailsPrivate *priv;
 137         GtkWidget *window;
 138         GtkTreePath *path;
 139         GtkTreeIter iter;
 140         int page;
 141
 142         priv = ev_sidebar_thumbnails->priv = EV_SIDEBAR_THUMBNAILS_GET_PRIVATE (ev_sidebar_thumbnails);
 143
 144         if (!gtk_tree_selection_get_selected (selection, NULL, &iter))
 145                 return;
 146
 147         path = gtk_tree_model_get_path (GTK_TREE_MODEL (priv->list_store),
 148                                         &iter);
 149
 150         page = gtk_tree_path_get_indices (path)[0] + 1;
 151
 152         gtk_tree_path_free (path);
 153
 154         window = gtk_widget_get_ancestor (GTK_WIDGET (ev_sidebar_thumbnails),
 155                                           EV_TYPE_WINDOW);
 156         if (window && ev_document_get_page (priv->document) != page) {
 157                 ev_window_open_page (EV_WINDOW (window), page);
 158         }
 159 }
 160
 161 static void
 162 ev_sidebar_thumbnails_init (EvSidebarThumbnails *ev_sidebar_thumbnails)
 163 {
 164         GtkWidget *swindow;
 165         EvSidebarThumbnailsPrivate *priv;
 166         GtkCellRenderer *renderer;
 167         GtkTreeSelection *selection;
 168
 169         priv = ev_sidebar_thumbnails->priv = EV_SIDEBAR_THUMBNAILS_GET_PRIVATE (ev_sidebar_thumbnails);
 170
 171         priv->list_store = gtk_list_store_new (NUM_COLUMNS, G_TYPE_STRING, GDK_TYPE_PIXBUF, G_TYPE_BOOLEAN);
 172         priv->tree_view = gtk_tree_view_new_with_model (GTK_TREE_MODEL (priv->list_store));
 173
 174         selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (priv->tree_view));
 175         g_signal_connect (selection, "changed",
 176                           G_CALLBACK (ev_sidebar_tree_selection_changed), ev_sidebar_thumbnails);
 177         gtk_tree_view_set_headers_visible (GTK_TREE_VIEW (priv->tree_view), FALSE);
 178         renderer = g_object_new (GTK_TYPE_CELL_RENDERER_PIXBUF,
 179                                  "xpad", 2,
 180                                  "ypad", 2,
 181                                  NULL);
 182         gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (priv->tree_view), -1,
 183                                                      NULL, renderer,
 184                                                      "pixbuf", 1,
 185                                                      NULL);
 186         gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (priv->tree_view), -1,
 187                                                      NULL, gtk_cell_renderer_text_new (),
 188                                                      "markup", 0, NULL);
 189
 190         g_object_unref (priv->list_store);
 191
 192         swindow = gtk_scrolled_window_new (NULL, NULL);
 193         gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (swindow),
 194                                         GTK_POLICY_NEVER, GTK_POLICY_AUTOMATIC);
 195         gtk_scrolled_window_set_shadow_type (GTK_SCROLLED_WINDOW (swindow),
 196                                              GTK_SHADOW_IN);
 197         priv->vadjustment = gtk_scrolled_window_get_vadjustment (GTK_SCROLLED_WINDOW (swindow));
 198         g_signal_connect (G_OBJECT (priv->vadjustment), "value-changed",
 199                           G_CALLBACK (adjustment_changed_cb),
 200                           ev_sidebar_thumbnails);
 201         gtk_container_add (GTK_CONTAINER (swindow), priv->tree_view);
 202         gtk_box_pack_start (GTK_BOX (ev_sidebar_thumbnails), swindow, TRUE, TRUE, 0);
 203
 204         gtk_widget_show_all (swindow);
 205 }
 206
 207 GtkWidget *
 208 ev_sidebar_thumbnails_new (void)
 209 {
 210         GtkWidget *ev_sidebar_thumbnails;
 211
 212         ev_sidebar_thumbnails = g_object_new (EV_TYPE_SIDEBAR_THUMBNAILS, NULL);
 213
 214         return ev_sidebar_thumbnails;
 215 }
 216
 217 static gboolean
 218 do_one_iteration (EvSidebarThumbnails *ev_sidebar_thumbnails)
 219 {
 220         EvSidebarThumbnailsPrivate *priv = ev_sidebar_thumbnails->priv;
 221         GdkPixbuf *pixbuf;
 222         gboolean thumbnail_set;
 223
 224         gtk_tree_model_get (GTK_TREE_MODEL (priv->list_store),
 225                             &(priv->current_page_iter),
 226                             COLUMN_THUMBNAIL_SET, &thumbnail_set,
 227                             -1);
 228         if (!thumbnail_set) {
 229                 pixbuf = ev_document_thumbnails_get_thumbnail (EV_DOCUMENT_THUMBNAILS (priv->document),
 230                                                                priv->current_page, THUMBNAIL_WIDTH);
 231
 232                 gtk_list_store_set (priv->list_store,
 233                                     &(priv->current_page_iter),
 234                                     COLUMN_PIXBUF, pixbuf,
 235                                     -1);
 236
 237                 g_object_unref (pixbuf);
 238                 priv->pages_done ++;
 239         }
 240
 241         priv->current_page++;
 242
 243         if (priv->current_page == priv->n_pages) {
 244                 priv->current_page = 0;
 245                 gtk_tree_model_get_iter_first (GTK_TREE_MODEL (priv->list_store),
 246                                                &(priv->current_page_iter));
 247         } else {
 248                 gtk_tree_model_iter_next (GTK_TREE_MODEL (priv->list_store),
 249                                           &(priv->current_page_iter));
 250         }
 251
 252         if (priv->pages_done == priv->n_pages)
 253                 return FALSE;
 254         else
 255                 return TRUE;
 256 }
 257
 258 static gboolean
 259 populate_thumbnails_idle (gpointer data)
 260 {
 261         GTimer *timer;
 262         int i;
 263         gdouble time_elapsed = 0;
 264
 265         EvSidebarThumbnails *ev_sidebar_thumbnails = EV_SIDEBAR_THUMBNAILS (data);
 266         EvSidebarThumbnailsPrivate *priv = ev_sidebar_thumbnails->priv;
 267
 268 #if PROFILE_THUMB == 1
 269         static GTimer *total_timer;
 270         static gboolean first_time = TRUE;
 271
 272         if (first_time) {
 273                 total_timer = g_timer_new ();
 274                 first_time = FALSE;
 275                 g_timer_start (total_timer);
 276         }
 277 #endif
 278
 279         /* undo the thumbnailing idle and handler */
 280         if (priv->pages_done == priv->n_pages) {
 281                 priv->idle_id = 0;
 282                 g_signal_handlers_disconnect_by_func (priv->vadjustment,
 283                                                       adjustment_changed_cb,
 284                                                       ev_sidebar_thumbnails);
 285 #if PROFILE_THUMB == 1
 286                 time_elapsed = g_timer_elapsed (total_timer, NULL);
 287                 g_timer_destroy (total_timer);
 288                 g_print ("%d rows done in %f seconds\n",
 289                          gtk_tree_model_iter_n_children (GTK_TREE_MODEL (priv->list_store), NULL),
 290                          time_elapsed);
 291 #endif
 292                 return FALSE;
 293         }
 294
 295         timer = g_timer_new ();
 296         i = 0;
 297         g_timer_start (timer);
 298         while (do_one_iteration (ev_sidebar_thumbnails)) {
 299                 i++;
 300                 time_elapsed = g_timer_elapsed (timer, NULL);
 301                 if (time_elapsed > IDLE_WORK_LENGTH/1000000)
 302                         break;
 303         }
 304         g_timer_destroy (timer);
 305 #if PROFILE_THUMB == 2
 306         g_print ("%d rows done this idle in %f seconds\n", i, time_elapsed);
 307 #endif
 308
 309         return TRUE;
 310 }
 311
 312 void
 313 ev_sidebar_thumbnails_select_page (EvSidebarThumbnails *sidebar,
 314                                    int                  page)
 315 {
 316         GtkTreePath *path;
 317         GtkTreeSelection *selection;
 318
 319         path = gtk_tree_path_new_from_indices (page - 1, -1);
 320         selection = gtk_tree_view_get_selection
 321                         (GTK_TREE_VIEW (sidebar->priv->tree_view));
 322
 323         if (path) {
 324                 gtk_tree_selection_select_path (selection, path);
 325                 gtk_tree_path_free (path);
 326         }
 327 }
 328
 329
 330 void
 331 ev_sidebar_thumbnails_set_document (EvSidebarThumbnails *sidebar_thumbnails,
 332                                     EvDocument          *document)
 333 {
 334         GdkPixbuf *loading_icon;
 335         gint i, n_pages;
 336         GtkTreeIter iter;
 337         gchar *page;
 338         gint width = THUMBNAIL_WIDTH;
 339         gint height = THUMBNAIL_WIDTH;
 340
 341         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 342
 343         g_return_if_fail (EV_IS_DOCUMENT_THUMBNAILS (document));
 344
 345         if (priv->idle_id != 0) {
 346                 g_source_remove (priv->idle_id);
 347         }
 348         n_pages = ev_document_get_n_pages (document);
 349
 350         priv->document = document;
 351         priv->idle_id = g_idle_add (populate_thumbnails_idle, sidebar_thumbnails);
 352         priv->n_pages = n_pages;
 353
 354         /* We get the dimensions of the first doc so that we can make a blank
 355          * icon.  */
 356         ev_document_thumbnails_get_dimensions (EV_DOCUMENT_THUMBNAILS (priv->document),
 357                                                0, THUMBNAIL_WIDTH, &width, &height);
 358         loading_icon = ev_document_misc_get_thumbnail_frame (width, height, NULL);
 359
 360         for (i = 0; i < n_pages; i++) {
 361                 page = g_strdup_printf ("<i>%d</i>", i + 1);
 362                 gtk_list_store_append (priv->list_store, &iter);
 363                 gtk_list_store_set (priv->list_store, &iter,
 364                                     COLUMN_PAGE_STRING, page,
 365                                     COLUMN_PIXBUF, loading_icon,
 366                                     COLUMN_THUMBNAIL_SET, FALSE,
 367                                     -1);
 368                 g_free (page);
 369         }
 370
 371         g_object_unref (loading_icon);
 372         gtk_tree_model_get_iter_first (GTK_TREE_MODEL (priv->list_store),
 373                                        &(priv->current_page_iter));
 374         priv->current_page = 0;
 375         priv->pages_done = 0;
 376 }
 377