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-job-queue.h"
  36 #include "ev-window.h"
  37 #include "ev-utils.h"
  38
  39 #define THUMBNAIL_WIDTH 100
  40
  41 /* Amount of time we devote to each iteration of the idle, in microseconds */
  42 #define IDLE_WORK_LENGTH 5000
  43
  44 struct _EvSidebarThumbnailsPrivate {
  45         GtkWidget *tree_view;
  46         GtkAdjustment *vadjustment;
  47         GtkListStore *list_store;
  48         EvDocument *document;
  49
  50         gint n_pages, pages_done;
  51 };
  52
  53 enum {
  54         COLUMN_PAGE_STRING,
  55         COLUMN_PIXBUF,
  56         COLUMN_THUMBNAIL_SET,
  57         COLUMN_JOB,
  58         NUM_COLUMNS
  59 };
  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_clear_model (EvSidebarThumbnails *sidebar);
  68
  69 static void
  70 ev_sidebar_thumbnails_dispose (GObject *object)
  71 {
  72         EvSidebarThumbnails *sidebar_thumbnails = EV_SIDEBAR_THUMBNAILS (object);
  73
  74         ev_sidebar_thumbnails_clear_model (sidebar_thumbnails);
  75
  76         G_OBJECT_CLASS (ev_sidebar_thumbnails_parent_class)->dispose (object);
  77 }
  78
  79 static void
  80 ev_sidebar_thumbnails_class_init (EvSidebarThumbnailsClass *ev_sidebar_thumbnails_class)
  81 {
  82         GObjectClass *g_object_class;
  83         GtkObjectClass *gtk_object_class;
  84
  85         g_object_class = G_OBJECT_CLASS (ev_sidebar_thumbnails_class);
  86         gtk_object_class = GTK_OBJECT_CLASS (ev_sidebar_thumbnails_class);
  87
  88         g_object_class->dispose = ev_sidebar_thumbnails_dispose;
  89
  90         g_type_class_add_private (g_object_class, sizeof (EvSidebarThumbnailsPrivate));
  91 }
  92
  93 static void
  94 adjustment_changed_cb (GtkAdjustment       *adjustment,
  95                        EvSidebarThumbnails *ev_sidebar_thumbnails)
  96 {
  97         EvSidebarThumbnailsPrivate *priv;
  98         GtkTreePath *path;
  99         GtkTreeIter iter;
 100         int page;
 101         gboolean thumbnail_set;
 102
 103         priv = ev_sidebar_thumbnails->priv = EV_SIDEBAR_THUMBNAILS_GET_PRIVATE (ev_sidebar_thumbnails);
 104
 105         gtk_tree_view_get_path_at_pos (GTK_TREE_VIEW (priv->tree_view),
 106                                        1, 1, &path,
 107                                        NULL, NULL, NULL);
 108         if (!path)
 109                 return;
 110
 111         page = gtk_tree_path_get_indices (path)[0];
 112         gtk_tree_model_get_iter (GTK_TREE_MODEL (priv->list_store),
 113                                  &iter, path);
 114         gtk_tree_model_get (GTK_TREE_MODEL (priv->list_store), &iter,
 115                             COLUMN_THUMBNAIL_SET, &thumbnail_set,
 116                             -1);
 117 }
 118
 119 static void
 120 ev_sidebar_tree_selection_changed (GtkTreeSelection *selection,
 121                                    EvSidebarThumbnails *ev_sidebar_thumbnails)
 122 {
 123         EvSidebarThumbnailsPrivate *priv;
 124         EvPageCache *page_cache;
 125         GtkTreePath *path;
 126         GtkTreeIter iter;
 127         int page;
 128
 129         priv = ev_sidebar_thumbnails->priv = EV_SIDEBAR_THUMBNAILS_GET_PRIVATE (ev_sidebar_thumbnails);
 130
 131         if (!gtk_tree_selection_get_selected (selection, NULL, &iter))
 132                 return;
 133
 134         path = gtk_tree_model_get_path (GTK_TREE_MODEL (priv->list_store),
 135                                         &iter);
 136         page = gtk_tree_path_get_indices (path)[0];
 137         gtk_tree_path_free (path);
 138
 139         page_cache = ev_document_get_page_cache (priv->document);
 140         ev_page_cache_set_current_page (page_cache, page);
 141 }
 142
 143 static void
 144 ev_sidebar_thumbnails_init (EvSidebarThumbnails *ev_sidebar_thumbnails)
 145 {
 146         GtkWidget *swindow;
 147         EvSidebarThumbnailsPrivate *priv;
 148         GtkCellRenderer *renderer;
 149         GtkTreeSelection *selection;
 150
 151         priv = ev_sidebar_thumbnails->priv = EV_SIDEBAR_THUMBNAILS_GET_PRIVATE (ev_sidebar_thumbnails);
 152
 153         priv->list_store = gtk_list_store_new (NUM_COLUMNS, G_TYPE_STRING, GDK_TYPE_PIXBUF, G_TYPE_BOOLEAN, EV_TYPE_JOB_THUMBNAIL);
 154         priv->tree_view = gtk_tree_view_new_with_model (GTK_TREE_MODEL (priv->list_store));
 155
 156         selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (priv->tree_view));
 157         g_signal_connect (selection, "changed",
 158                           G_CALLBACK (ev_sidebar_tree_selection_changed), ev_sidebar_thumbnails);
 159         gtk_tree_view_set_headers_visible (GTK_TREE_VIEW (priv->tree_view), FALSE);
 160         renderer = g_object_new (GTK_TYPE_CELL_RENDERER_PIXBUF,
 161                                  "xpad", 2,
 162                                  "ypad", 2,
 163                                  NULL);
 164         gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (priv->tree_view), -1,
 165                                                      NULL, renderer,
 166                                                      "pixbuf", 1,
 167                                                      NULL);
 168         gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (priv->tree_view), -1,
 169                                                      NULL, gtk_cell_renderer_text_new (),
 170                                                      "markup", 0, NULL);
 171
 172         g_object_unref (priv->list_store);
 173
 174         swindow = gtk_scrolled_window_new (NULL, NULL);
 175         gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (swindow),
 176                                         GTK_POLICY_NEVER, GTK_POLICY_AUTOMATIC);
 177         gtk_scrolled_window_set_shadow_type (GTK_SCROLLED_WINDOW (swindow),
 178                                              GTK_SHADOW_IN);
 179         priv->vadjustment = gtk_scrolled_window_get_vadjustment (GTK_SCROLLED_WINDOW (swindow));
 180         g_signal_connect (G_OBJECT (priv->vadjustment), "value-changed",
 181                           G_CALLBACK (adjustment_changed_cb),
 182                           ev_sidebar_thumbnails);
 183         gtk_container_add (GTK_CONTAINER (swindow), priv->tree_view);
 184         gtk_box_pack_start (GTK_BOX (ev_sidebar_thumbnails), swindow, TRUE, TRUE, 0);
 185
 186         gtk_widget_show_all (swindow);
 187 }
 188
 189 GtkWidget *
 190 ev_sidebar_thumbnails_new (void)
 191 {
 192         GtkWidget *ev_sidebar_thumbnails;
 193
 194         ev_sidebar_thumbnails = g_object_new (EV_TYPE_SIDEBAR_THUMBNAILS, NULL);
 195
 196         return ev_sidebar_thumbnails;
 197 }
 198
 199 static void
 200 page_changed_cb (EvPageCache         *page_cache,
 201                  int                  page,
 202                  EvSidebarThumbnails *sidebar)
 203 {
 204         GtkTreePath *path;
 205         GtkTreeSelection *selection;
 206
 207         path = gtk_tree_path_new_from_indices (page, -1);
 208         selection = gtk_tree_view_get_selection
 209                         (GTK_TREE_VIEW (sidebar->priv->tree_view));
 210
 211         gtk_tree_selection_select_path (selection, path);
 212         gtk_tree_view_scroll_to_cell (GTK_TREE_VIEW (sidebar->priv->tree_view),
 213                                       path, NULL, FALSE, 0.0, 0.0);
 214         gtk_tree_path_free (path);
 215 }
 216
 217 static void
 218 thumbnail_job_completed_callback (EvJobThumbnail      *job,
 219                                   EvSidebarThumbnails *sidebar_thumbnails)
 220 {
 221         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 222         GtkTreeIter *iter;
 223
 224         iter = (GtkTreeIter *) g_object_get_data (G_OBJECT (job), "tree_iter");
 225         gtk_list_store_set (priv->list_store,
 226                             iter,
 227                             COLUMN_PIXBUF, job->thumbnail,
 228                             COLUMN_THUMBNAIL_SET, TRUE,
 229                             COLUMN_JOB, NULL,
 230                             -1);
 231 }
 232
 233 void
 234 ev_sidebar_thumbnails_set_document (EvSidebarThumbnails *sidebar_thumbnails,
 235                                     EvDocument          *document)
 236 {
 237         GdkPixbuf *loading_icon;
 238         gint i, n_pages;
 239         GtkTreeIter iter;
 240         gint width = THUMBNAIL_WIDTH;
 241         gint height = THUMBNAIL_WIDTH;
 242         EvPageCache *page_cache;
 243
 244         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 245
 246         g_return_if_fail (EV_IS_DOCUMENT_THUMBNAILS (document));
 247
 248         page_cache = ev_document_get_page_cache (document);
 249         n_pages = ev_page_cache_get_n_pages (page_cache);
 250
 251         priv->document = document;
 252         priv->n_pages = n_pages;
 253
 254         /* We get the dimensions of the first doc so that we can make a blank
 255          * icon.  */
 256         g_mutex_lock (EV_DOC_MUTEX);
 257         ev_document_thumbnails_get_dimensions (EV_DOCUMENT_THUMBNAILS (priv->document),
 258                                                0, THUMBNAIL_WIDTH, &width, &height);
 259         g_mutex_unlock (EV_DOC_MUTEX);
 260
 261         loading_icon = ev_document_misc_get_thumbnail_frame (width, height, NULL);
 262
 263         ev_sidebar_thumbnails_clear_model (sidebar_thumbnails);
 264         for (i = 0; i < n_pages; i++) {
 265                 EvJob *job;
 266                 gchar *page_label;
 267                 gchar *page_string;
 268
 269                 job = ev_job_thumbnail_new (priv->document, i, THUMBNAIL_WIDTH);
 270                 page_label = ev_page_cache_get_page_label (page_cache, i);
 271                 page_string = g_markup_printf_escaped ("<i>%s</i>", page_label);
 272
 273                 gtk_list_store_append (priv->list_store, &iter);
 274                 gtk_list_store_set (priv->list_store, &iter,
 275                                     COLUMN_PAGE_STRING, page_string,
 276                                     COLUMN_PIXBUF, loading_icon,
 277                                     COLUMN_THUMBNAIL_SET, FALSE,
 278                                     COLUMN_JOB, job,
 279                                     -1);
 280                 g_free (page_label);
 281                 g_free (page_string);
 282                 ev_job_queue_add_job (job, EV_JOB_PRIORITY_LOW);
 283                 g_object_set_data_full (G_OBJECT (job), "tree_iter",
 284                                         gtk_tree_iter_copy (&iter),
 285                                         (GDestroyNotify) gtk_tree_iter_free);
 286                 g_signal_connect (job, "finished",
 287                                   G_CALLBACK (thumbnail_job_completed_callback),
 288                                   sidebar_thumbnails);
 289         }
 290
 291         g_object_unref (loading_icon);
 292
 293         /* Connect to the signal and trigger a fake callback */
 294         g_signal_connect (page_cache, "page-changed", G_CALLBACK (page_changed_cb), sidebar_thumbnails);
 295         page_changed_cb (page_cache, ev_page_cache_get_current_page (page_cache), sidebar_thumbnails);
 296
 297 }
 298
 299 static gboolean
 300 ev_sidebar_thumbnails_clear_job (GtkTreeModel *model,
 301                                  GtkTreePath *path,
 302                                  GtkTreeIter *iter,
 303                                  gpointer data)
 304 {
 305     EvJob *job;
 306
 307     gtk_tree_model_get (model, iter, COLUMN_JOB, &job, -1);
 308
 309     if (job != NULL) {
 310         ev_job_queue_remove_job (job);
 311         g_signal_handlers_disconnect_by_func (job, thumbnail_job_completed_callback, data);
 312         g_object_unref (job);
 313     }
 314
 315     return FALSE;
 316 }
 317
 318 static void
 319 ev_sidebar_thumbnails_clear_model (EvSidebarThumbnails *sidebar_thumbnails)
 320 {
 321     EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 322
 323     gtk_tree_model_foreach (GTK_TREE_MODEL (priv->list_store), ev_sidebar_thumbnails_clear_job, sidebar_thumbnails);
 324     gtk_list_store_clear (priv->list_store);
 325 }
 326
 327