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