Add layers support.

2008-11-15  Carlos Garcia Campos  <carlosgc@gnome.org>

	* shell/Makefile.am:
	* shell/ev-jobs.[ch]: (ev_job_layers_init),
	(ev_job_layers_dispose), (ev_job_layers_run),
	(ev_job_layers_class_init), (ev_job_layers_new):
	* shell/ev-sidebar-layers.[ch]:
	* shell/ev-view.[ch]: (ev_view_form_field_button_create_widget),
	(ev_view_form_field_text_save), (ev_view_form_field_choice_save),
	(ev_view_reload_page), (ev_view_reload):
	* shell/ev-window.c: (setup_sidebar_from_metadata),
	(ev_window_sidebar_current_page_changed_cb),
	(sidebar_layers_visibility_changed), (ev_window_init):

	Add layers support.

svn path=/trunk/; revision=3268

8 files changed, 653 insertions, 50 deletions

diff --git a/shell/Makefile.am b/shell/Makefile.am
index 3dc7e15..b1dafd7 100644
--- a/shell/Makefile.am
+++ b/shell/Makefile.am
@@ -1,18 +1,19 @@
-INCLUDES=						\
-	-DDATADIR=\"$(pkgdatadir)\"			\
-	-DGNOMEDATADIR=\"$(datadir)\"			\
-	-I$(top_srcdir)/cut-n-paste/zoom-control/	\
-	-I$(top_srcdir)/cut-n-paste/toolbar-editor/	\
-	-I$(top_srcdir)/cut-n-paste/totem-screensaver/	\
-	-I$(top_srcdir)/cut-n-paste/gedit-message-area/	\
-	-I$(top_srcdir)/cut-n-paste/evmountoperation/	\
-	-I$(top_srcdir)/cut-n-paste/smclient/		\
-	-I$(top_srcdir)/libdocument			\
-	-I$(top_srcdir)/properties			\
-	-DGNOMELOCALEDIR=\"$(datadir)/locale\"		\
-	-DGNOMEICONDIR=\""$(datadir)/pixmaps"\" 	\
-	$(SHELL_CFLAGS)					\
-	$(WARN_CFLAGS)					\
+INCLUDES=							\
+	-DDATADIR=\"$(pkgdatadir)\"				\
+	-DGNOMEDATADIR=\"$(datadir)\"				\
+	-I$(top_srcdir)/cut-n-paste/zoom-control/		\
+	-I$(top_srcdir)/cut-n-paste/toolbar-editor/		\
+	-I$(top_srcdir)/cut-n-paste/totem-screensaver/		\
+	-I$(top_srcdir)/cut-n-paste/gedit-message-area/		\
+	-I$(top_srcdir)/cut-n-paste/gimpcellrenderertoggle/	\
+	-I$(top_srcdir)/cut-n-paste/evmountoperation/		\
+	-I$(top_srcdir)/cut-n-paste/smclient/			\
+	-I$(top_srcdir)/libdocument				\
+	-I$(top_srcdir)/properties				\
+	-DGNOMELOCALEDIR=\"$(datadir)/locale\"			\
+	-DGNOMEICONDIR=\""$(datadir)/pixmaps"\" 		\
+	$(SHELL_CFLAGS)						\
+	$(WARN_CFLAGS)						\
 	$(DISABLE_DEPRECATED)
 
 bin_PROGRAMS=evince
@@ -81,6 +82,8 @@ evince_SOURCES=				\
 	ev-sidebar.h			\
 	ev-sidebar-attachments.c	\
 	ev-sidebar-attachments.h	\
+	ev-sidebar-layers.c		\
+	ev-sidebar-layers.h		\
 	ev-sidebar-links.c		\
 	ev-sidebar-links.h		\
 	ev-sidebar-page.c		\
@@ -95,15 +98,16 @@ evince_SOURCES=				\
 	ev-transition-animation.h	\
 	main.c
 
-evince_LDADD=									\
-	$(top_builddir)/cut-n-paste/zoom-control/libephyzoom.la			\
-	$(top_builddir)/cut-n-paste/toolbar-editor/libtoolbareditor.la		\
-	$(top_builddir)/cut-n-paste/totem-screensaver/libtotemscrsaver.la	\
-	$(top_builddir)/cut-n-paste/gedit-message-area/libgeditmsgarea.la	\
-	$(top_builddir)/cut-n-paste/evmountoperation/libevmountoperation.la	\
-	$(top_builddir)/cut-n-paste/smclient/libsmclient.la			\
-	$(top_builddir)/properties/libevproperties.la				\
-	$(top_builddir)/libdocument/libevbackend.la				\
+evince_LDADD=										\
+	$(top_builddir)/cut-n-paste/zoom-control/libephyzoom.la				\
+	$(top_builddir)/cut-n-paste/toolbar-editor/libtoolbareditor.la			\
+	$(top_builddir)/cut-n-paste/totem-screensaver/libtotemscrsaver.la		\
+	$(top_builddir)/cut-n-paste/gedit-message-area/libgeditmsgarea.la		\
+	$(top_builddir)/cut-n-paste/gimpcellrenderertoggle/libgimpcellrenderertoggle.la	\
+	$(top_builddir)/cut-n-paste/evmountoperation/libevmountoperation.la		\
+	$(top_builddir)/cut-n-paste/smclient/libsmclient.la				\
+	$(top_builddir)/properties/libevproperties.la					\
+	$(top_builddir)/libdocument/libevbackend.la					\
 	$(SHELL_LIBS)
 
 BUILT_SOURCES = ev-marshal.h ev-marshal.c
diff --git a/shell/ev-jobs.c b/shell/ev-jobs.c
index dee23b8..1a5dd47 100644
--- a/shell/ev-jobs.c
+++ b/shell/ev-jobs.c
@@ -32,6 +32,7 @@
 #include "ev-document-fonts.h"
 #include "ev-document-security.h"
 #include "ev-document-find.h"
+#include "ev-document-layers.h"
 #include "ev-debug.h"
 
 #include <errno.h>
@@ -57,6 +58,8 @@ static void ev_job_print_init             (EvJobPrint            *job);
 static void ev_job_print_class_init       (EvJobPrintClass       *class);
 static void ev_job_find_init              (EvJobFind             *job);
 static void ev_job_find_class_init        (EvJobFindClass        *class);
+static void ev_job_layers_init            (EvJobLayers           *job);
+static void ev_job_layers_class_init      (EvJobLayersClass      *class);
 
 enum {
 	CANCELLED,
@@ -94,6 +97,7 @@ G_DEFINE_TYPE (EvJobLoad, ev_job_load, EV_TYPE_JOB)
 G_DEFINE_TYPE (EvJobSave, ev_job_save, EV_TYPE_JOB)
 G_DEFINE_TYPE (EvJobPrint, ev_job_print, EV_TYPE_JOB)
 G_DEFINE_TYPE (EvJobFind, ev_job_find, EV_TYPE_JOB)
+G_DEFINE_TYPE (EvJobLayers, ev_job_layers, EV_TYPE_JOB)
 
 /* EvJob */
 static void
@@ -1536,3 +1540,66 @@ ev_job_find_get_results (EvJobFind *job)
 	return job->pages;
 }
 
+/* EvJobLayers */
+static void
+ev_job_layers_init (EvJobLayers *job)
+{
+	EV_JOB (job)->run_mode = EV_JOB_RUN_THREAD;
+}
+
+static void
+ev_job_layers_dispose (GObject *object)
+{
+	EvJobLayers *job;
+
+	ev_debug_message (DEBUG_JOBS, NULL);
+	
+	job = EV_JOB_LAYERS (object);
+
+	if (job->model) {
+		g_object_unref (job->model);
+		job->model = NULL;
+	}
+
+	(* G_OBJECT_CLASS (ev_job_layers_parent_class)->dispose) (object);
+}
+
+static gboolean
+ev_job_layers_run (EvJob *job)
+{
+	EvJobLayers *job_layers = EV_JOB_LAYERS (job);
+
+	ev_debug_message (DEBUG_JOBS, NULL);
+	ev_profiler_start (EV_PROFILE_JOBS, "%s (%p)", EV_GET_TYPE_NAME (job), job);
+	
+	ev_document_doc_mutex_lock ();
+	job_layers->model = ev_document_layers_get_layers (EV_DOCUMENT_LAYERS (job->document));
+	ev_document_doc_mutex_unlock ();
+	
+	ev_job_succeeded (job);
+	
+	return FALSE;
+}
+
+static void
+ev_job_layers_class_init (EvJobLayersClass *class)
+{
+	GObjectClass *oclass = G_OBJECT_CLASS (class);
+	EvJobClass   *job_class = EV_JOB_CLASS (class);
+
+	oclass->dispose = ev_job_layers_dispose;
+	job_class->run = ev_job_layers_run;
+}
+
+EvJob *
+ev_job_layers_new (EvDocument *document)
+{
+	EvJob *job;
+
+	ev_debug_message (DEBUG_JOBS, NULL);
+
+	job = g_object_new (EV_TYPE_JOB_LAYERS, NULL);
+	job->document = g_object_ref (document);
+	
+	return job;
+}
diff --git a/shell/ev-jobs.h b/shell/ev-jobs.h
index 188759e..6d6581a 100644
--- a/shell/ev-jobs.h
+++ b/shell/ev-jobs.h
@@ -60,6 +60,9 @@ typedef struct _EvJobPrintClass EvJobPrintClass;
 typedef struct _EvJobFind EvJobFind;
 typedef struct _EvJobFindClass EvJobFindClass;
 
+typedef struct _EvJobLayers EvJobLayers;
+typedef struct _EvJobLayersClass EvJobLayersClass;
+
 #define EV_TYPE_JOB		     	     (ev_job_get_type())
 #define EV_JOB(object)		             (G_TYPE_CHECK_INSTANCE_CAST((object), EV_TYPE_JOB, EvJob))
 #define EV_JOB_CLASS(klass)	             (G_TYPE_CHECK_CLASS_CAST((klass), EV_TYPE_JOB, EvJobClass))
@@ -106,10 +109,15 @@ typedef struct _EvJobFindClass EvJobFindClass;
 #define EV_JOB_PRINT_CLASS(klass)            (G_TYPE_CHECK_CLASS_CAST((klass), EV_TYPE_JOB_PRINT, EvJobPrintClass))
 #define EV_IS_JOB_PRINT(object)              (G_TYPE_CHECK_INSTANCE_TYPE((object), EV_TYPE_JOB_PRINT))
 
-#define EV_TYPE_JOB_FIND                    (ev_job_find_get_type())
-#define EV_JOB_FIND(object)                 (G_TYPE_CHECK_INSTANCE_CAST((object), EV_TYPE_JOB_FIND, EvJobFind))
-#define EV_JOB_FIND_CLASS(klass)            (G_TYPE_CHECK_CLASS_CAST((klass), EV_TYPE_JOB_FIND, EvJobFindClass))
-#define EV_IS_JOB_FIND(object)              (G_TYPE_CHECK_INSTANCE_TYPE((object), EV_TYPE_JOB_FIND))
+#define EV_TYPE_JOB_FIND                     (ev_job_find_get_type())
+#define EV_JOB_FIND(object)                  (G_TYPE_CHECK_INSTANCE_CAST((object), EV_TYPE_JOB_FIND, EvJobFind))
+#define EV_JOB_FIND_CLASS(klass)             (G_TYPE_CHECK_CLASS_CAST((klass), EV_TYPE_JOB_FIND, EvJobFindClass))
+#define EV_IS_JOB_FIND(object)               (G_TYPE_CHECK_INSTANCE_TYPE((object), EV_TYPE_JOB_FIND))
+
+#define EV_TYPE_JOB_LAYERS                   (ev_job_layers_get_type())
+#define EV_JOB_LAYERS(object)                (G_TYPE_CHECK_INSTANCE_CAST((object), EV_TYPE_JOB_LAYERS, EvJobLayers))
+#define EV_JOB_LAYERS_CLASS(klass)           (G_TYPE_CHECK_CLASS_CAST((klass), EV_TYPE_JOB_LAYERS, EvJobLayersClass))
+#define EV_IS_JOB_LAYERS(object)             (G_TYPE_CHECK_INSTANCE_TYPE((object), EV_TYPE_JOB_LAYERS))
 
 typedef enum {
 	EV_JOB_RUN_THREAD,
@@ -320,6 +328,18 @@ struct _EvJobFindClass
 			   gint       page);
 };
 
+struct _EvJobLayers
+{
+	EvJob parent;
+
+	GtkTreeModel *model;
+};
+
+struct _EvJobLayersClass
+{
+	EvJobClass parent_class;
+};
+
 /* Base job class */
 GType           ev_job_get_type           (void) G_GNUC_CONST;
 gboolean        ev_job_run                (EvJob          *job);
@@ -414,6 +434,10 @@ gdouble         ev_job_find_get_progress  (EvJobFind       *job);
 gboolean        ev_job_find_has_results   (EvJobFind       *job);
 GList         **ev_job_find_get_results   (EvJobFind       *job);
 
+/* EvJobLayers */
+GType           ev_job_layers_get_type    (void) G_GNUC_CONST;
+EvJob          *ev_job_layers_new         (EvDocument     *document);
+
 G_END_DECLS
 
 #endif /* __EV_JOBS_H__ */
diff --git a/shell/ev-sidebar-layers.c b/shell/ev-sidebar-layers.c
new file mode 100644
index 0000000..cebd96d
--- /dev/null
+++ b/shell/ev-sidebar-layers.c
@@ -0,0 +1,405 @@
+/* ev-sidebar-layers.c
+ *  this file is part of evince, a gnome document viewer
+ *
+ * Copyright (C) 2008 Carlos Garcia Campos  <carlosgc@gnome.org>
+ *
+ * Evince is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * Evince is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#include "config.h"
+
+#include <glib/gi18n.h>
+#include "gimpcellrenderertoggle.h"
+
+#include "ev-document-layers.h"
+#include "ev-sidebar-page.h"
+#include "ev-jobs.h"
+#include "ev-job-scheduler.h"
+#include "ev-stock-icons.h"
+#include "ev-sidebar-layers.h"
+
+struct _EvSidebarLayersPrivate {
+	GtkTreeView  *tree_view;
+
+	EvDocument   *document;
+	EvJob        *job;
+};
+
+enum {
+	PROP_0,
+	PROP_WIDGET
+};
+
+enum {
+	LAYERS_VISIBILITY_CHANGED,
+	N_SIGNALS
+};
+
+static void ev_sidebar_layers_page_iface_init (EvSidebarPageIface *iface);
+static void job_finished_callback             (EvJobLayers        *job,
+					       EvSidebarLayers    *sidebar_layers);
+
+static guint signals[N_SIGNALS];
+
+G_DEFINE_TYPE_EXTENDED (EvSidebarLayers,
+                        ev_sidebar_layers,
+                        GTK_TYPE_VBOX,
+                        0, 
+                        G_IMPLEMENT_INTERFACE (EV_TYPE_SIDEBAR_PAGE, 
+					       ev_sidebar_layers_page_iface_init))
+
+#define EV_SIDEBAR_LAYERS_GET_PRIVATE(object) \
+	(G_TYPE_INSTANCE_GET_PRIVATE ((object), EV_TYPE_SIDEBAR_LAYERS, EvSidebarLayersPrivate))
+
+static void
+ev_sidebar_layers_dispose (GObject *object)
+{
+	EvSidebarLayers *sidebar = EV_SIDEBAR_LAYERS (object);
+
+	if (sidebar->priv->job) {
+		g_signal_handlers_disconnect_by_func (sidebar->priv->job,
+						      job_finished_callback,
+						      sidebar);
+		ev_job_cancel (sidebar->priv->job);						      
+		g_object_unref (sidebar->priv->job);
+		sidebar->priv->job = NULL;
+	}
+
+	if (sidebar->priv->document) {
+		g_object_unref (sidebar->priv->document);
+		sidebar->priv->document = NULL;
+	}
+
+	G_OBJECT_CLASS (ev_sidebar_layers_parent_class)->dispose (object);
+}
+
+static void
+ev_sidebar_layers_get_property (GObject    *object,
+				guint       prop_id,
+				GValue     *value,
+				GParamSpec *pspec)
+{
+	EvSidebarLayers *ev_sidebar_layers;
+  
+	ev_sidebar_layers = EV_SIDEBAR_LAYERS (object);
+
+	switch (prop_id) {
+	        case PROP_WIDGET:
+			g_value_set_object (value, ev_sidebar_layers->priv->tree_view);
+			break;
+	        default:
+			G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+			break;
+	}
+}
+
+static GtkTreeModel *
+ev_sidebar_layers_create_loading_model (void)
+{
+	GtkTreeModel *retval;
+	GtkTreeIter   iter;
+	gchar        *markup;
+
+	/* Creates a fake model to indicate that we're loading */
+	retval = (GtkTreeModel *)gtk_list_store_new (EV_DOCUMENT_LAYERS_N_COLUMNS,
+						     G_TYPE_STRING,
+						     G_TYPE_OBJECT,
+						     G_TYPE_BOOLEAN,
+						     G_TYPE_BOOLEAN,
+						     G_TYPE_BOOLEAN,
+						     G_TYPE_INT);
+
+	gtk_list_store_append (GTK_LIST_STORE (retval), &iter);
+	markup = g_strdup_printf ("<span size=\"larger\" style=\"italic\">%s</span>", _("Loading..."));
+	gtk_list_store_set (GTK_LIST_STORE (retval), &iter,
+			    EV_DOCUMENT_LAYERS_COLUMN_TITLE, markup,
+			    EV_DOCUMENT_LAYERS_COLUMN_VISIBLE, FALSE,
+			    EV_DOCUMENT_LAYERS_COLUMN_ENABLED, TRUE,
+			    EV_DOCUMENT_LAYERS_COLUMN_SHOWTOGGLE, FALSE,
+			    EV_DOCUMENT_LAYERS_COLUMN_RBGROUP, -1,
+			    EV_DOCUMENT_LAYERS_COLUMN_LAYER, NULL,
+			    -1);
+	g_free (markup);
+
+	return retval;
+}
+
+static gboolean
+update_kids (GtkTreeModel *model,
+	     GtkTreePath  *path,
+	     GtkTreeIter  *iter,
+	     GtkTreeIter  *parent)
+{
+	if (gtk_tree_store_is_ancestor (GTK_TREE_STORE (model), parent, iter)) {
+		gboolean visible;
+
+		gtk_tree_model_get (model, parent,
+				    EV_DOCUMENT_LAYERS_COLUMN_VISIBLE, &visible,
+				    -1);
+		gtk_tree_store_set (GTK_TREE_STORE (model), iter,
+				    EV_DOCUMENT_LAYERS_COLUMN_ENABLED, visible,
+				    -1);
+	}
+
+	return FALSE;
+}
+
+static gboolean
+clear_rb_group (GtkTreeModel *model,
+		GtkTreePath  *path,
+		GtkTreeIter  *iter,
+		gint         *rb_group)
+{
+	gint group;
+
+	gtk_tree_model_get (model, iter,
+			    EV_DOCUMENT_LAYERS_COLUMN_RBGROUP, &group,
+			    -1);
+
+	if (group == *rb_group) {
+		gtk_tree_store_set (GTK_TREE_STORE (model), iter,
+				    EV_DOCUMENT_LAYERS_COLUMN_VISIBLE, FALSE,
+				    -1);
+	}
+
+	return FALSE;
+}
+
+static void
+ev_sidebar_layers_visibility_changed (GtkCellRendererToggle *cell,
+				      gchar                 *path_str,
+				      EvSidebarLayers       *ev_layers)
+{
+	GtkTreeModel *model;
+	GtkTreePath  *path;
+	GtkTreeIter   iter;
+	gboolean      visible;
+	EvLayer      *layer;
+
+	model = gtk_tree_view_get_model (ev_layers->priv->tree_view);
+	
+	path = gtk_tree_path_new_from_string (path_str);
+	gtk_tree_model_get_iter (model, &iter, path);
+	gtk_tree_model_get (model, &iter,
+			    EV_DOCUMENT_LAYERS_COLUMN_VISIBLE, &visible,
+			    EV_DOCUMENT_LAYERS_COLUMN_LAYER, &layer, 
+			    -1);
+	
+	visible = !visible;
+	if (visible) {
+		gint rb_group;
+		
+		ev_document_layers_show_layer (EV_DOCUMENT_LAYERS (ev_layers->priv->document),
+					       layer);
+
+		rb_group = ev_layer_get_rb_group (layer);
+		if (rb_group) {
+			gtk_tree_model_foreach (model,
+						(GtkTreeModelForeachFunc)clear_rb_group,
+						&rb_group);
+		}
+	} else {
+		ev_document_layers_hide_layer (EV_DOCUMENT_LAYERS (ev_layers->priv->document),
+					       layer);
+	}
+	
+	gtk_tree_store_set (GTK_TREE_STORE (model), &iter,
+			    EV_DOCUMENT_LAYERS_COLUMN_VISIBLE, visible,
+			    -1);
+
+	if (ev_layer_is_parent (layer)) {
+		gtk_tree_model_foreach (model,
+					(GtkTreeModelForeachFunc)update_kids,
+					&iter);
+	}
+	
+	gtk_tree_path_free (path);
+
+	g_signal_emit (ev_layers, signals[LAYERS_VISIBILITY_CHANGED], 0);
+}
+
+static GtkTreeView *
+ev_sidebar_layers_create_tree_view (EvSidebarLayers *ev_layers)
+{
+	GtkTreeView       *tree_view;
+	GtkTreeViewColumn *column;
+	GtkCellRenderer   *renderer;
+	
+	tree_view = GTK_TREE_VIEW (gtk_tree_view_new ());
+	gtk_tree_view_set_headers_visible (tree_view, FALSE);
+	gtk_tree_selection_set_mode (gtk_tree_view_get_selection (tree_view),
+				     GTK_SELECTION_NONE);
+
+
+	column = gtk_tree_view_column_new ();
+
+	renderer = gimp_cell_renderer_toggle_new (EV_STOCK_VISIBLE);
+	gtk_tree_view_column_pack_start (column, renderer, FALSE);
+	gtk_tree_view_column_set_attributes (column, renderer,
+					     "active", EV_DOCUMENT_LAYERS_COLUMN_VISIBLE,
+					     "activatable", EV_DOCUMENT_LAYERS_COLUMN_ENABLED,
+					     "visible", EV_DOCUMENT_LAYERS_COLUMN_SHOWTOGGLE,
+					     "sensitive", EV_DOCUMENT_LAYERS_COLUMN_ENABLED,
+					     NULL);
+	g_object_set (G_OBJECT (renderer),
+		      "xpad", 0,
+		      "ypad", 0,
+		      NULL);
+	g_signal_connect (renderer, "toggled",
+			  G_CALLBACK (ev_sidebar_layers_visibility_changed),
+			  (gpointer)ev_layers);
+
+	renderer = gtk_cell_renderer_text_new ();
+	gtk_tree_view_column_pack_start (column, renderer, TRUE);
+	gtk_tree_view_column_set_attributes (column, renderer,
+					     "markup", EV_DOCUMENT_LAYERS_COLUMN_TITLE,
+					     "sensitive", EV_DOCUMENT_LAYERS_COLUMN_ENABLED,
+					     NULL);
+	g_object_set (G_OBJECT (renderer), "ellipsize", PANGO_ELLIPSIZE_END, NULL);
+	
+	gtk_tree_view_append_column (tree_view, column);
+
+	return tree_view;
+}
+
+static void
+ev_sidebar_layers_init (EvSidebarLayers *ev_layers)
+{
+	GtkWidget    *swindow;
+	GtkTreeModel *model;
+	
+	ev_layers->priv = EV_SIDEBAR_LAYERS_GET_PRIVATE (ev_layers);
+
+	swindow = gtk_scrolled_window_new (NULL, NULL);
+	gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (swindow),
+					GTK_POLICY_NEVER,
+					GTK_POLICY_AUTOMATIC);
+	gtk_scrolled_window_set_shadow_type (GTK_SCROLLED_WINDOW (swindow),
+					     GTK_SHADOW_IN);
+	/* Data Model */
+	model = ev_sidebar_layers_create_loading_model ();
+
+	/* Layers list */
+	ev_layers->priv->tree_view = ev_sidebar_layers_create_tree_view (ev_layers);
+	gtk_tree_view_set_model (ev_layers->priv->tree_view, model);
+	g_object_unref (model);
+
+	gtk_container_add (GTK_CONTAINER (swindow),
+			   GTK_WIDGET (ev_layers->priv->tree_view));
+
+	gtk_container_add (GTK_CONTAINER (ev_layers), swindow);
+	gtk_widget_show_all (GTK_WIDGET (ev_layers));
+}
+
+static void
+ev_sidebar_layers_class_init (EvSidebarLayersClass *ev_layers_class)
+{
+	GObjectClass *g_object_class = G_OBJECT_CLASS (ev_layers_class);
+
+	g_object_class->get_property = ev_sidebar_layers_get_property;
+	g_object_class->dispose = ev_sidebar_layers_dispose;
+
+	g_type_class_add_private (g_object_class, sizeof (EvSidebarLayersPrivate));
+
+	g_object_class_override_property (g_object_class, PROP_WIDGET, "main-widget");
+
+	signals[LAYERS_VISIBILITY_CHANGED] =
+		g_signal_new ("layers_visibility_changed",
+			      G_TYPE_FROM_CLASS (g_object_class),
+			      G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
+			      G_STRUCT_OFFSET (EvSidebarLayersClass, layers_visibility_changed),
+			      NULL, NULL,
+			      g_cclosure_marshal_VOID__VOID,
+			      G_TYPE_NONE, 0, G_TYPE_NONE);
+}
+
+GtkWidget *
+ev_sidebar_layers_new (void)
+{
+	return GTK_WIDGET (g_object_new (EV_TYPE_SIDEBAR_LAYERS, NULL));
+}
+
+static void
+job_finished_callback (EvJobLayers     *job,
+		       EvSidebarLayers *sidebar_layers)
+{
+	EvSidebarLayersPrivate *priv;
+
+	priv = sidebar_layers->priv;
+
+	gtk_tree_view_set_model (GTK_TREE_VIEW (priv->tree_view), job->model);
+	
+	g_object_unref (job);
+	priv->job = NULL;
+}
+
+static void
+ev_sidebar_layers_set_document (EvSidebarPage  *sidebar_page,
+				EvDocument     *document)
+{
+	EvSidebarLayers *sidebar_layers;
+	EvSidebarLayersPrivate *priv;
+
+	g_return_if_fail (EV_IS_SIDEBAR_PAGE (sidebar_page));
+	g_return_if_fail (EV_IS_DOCUMENT (document));
+	
+	sidebar_layers = EV_SIDEBAR_LAYERS (sidebar_page);
+
+	priv = sidebar_layers->priv;
+
+	if (priv->document) {
+		gtk_tree_view_set_model (GTK_TREE_VIEW (priv->tree_view), NULL);
+		g_object_unref (priv->document);
+	}
+
+	priv->document = g_object_ref (document);
+
+	if (priv->job) {
+		g_signal_handlers_disconnect_by_func (priv->job,
+						      job_finished_callback,
+						      sidebar_layers);
+		g_object_unref (priv->job);
+	}
+
+	priv->job = ev_job_layers_new (document);
+	g_signal_connect (priv->job, "finished",
+			  G_CALLBACK (job_finished_callback),
+			  sidebar_layers);
+	/* The priority doesn't matter for this job */
+	ev_job_scheduler_push_job (priv->job, EV_JOB_PRIORITY_NONE);
+}
+
+static gboolean
+ev_sidebar_layers_support_document (EvSidebarPage *sidebar_page,
+				    EvDocument    *document)
+{
+	return (EV_IS_DOCUMENT_LAYERS (document) &&
+		ev_document_layers_has_layers (EV_DOCUMENT_LAYERS (document)));
+}
+
+static const gchar*
+ev_sidebar_layers_get_label (EvSidebarPage *sidebar_page)
+{
+	return _("Layers");
+}
+
+static void
+ev_sidebar_layers_page_iface_init (EvSidebarPageIface *iface)
+{
+	iface->support_document = ev_sidebar_layers_support_document;
+	iface->set_document = ev_sidebar_layers_set_document;
+	iface->get_label = ev_sidebar_layers_get_label;
+}
+
diff --git a/shell/ev-sidebar-layers.h b/shell/ev-sidebar-layers.h
new file mode 100644
index 0000000..f974d79
--- /dev/null
+++ b/shell/ev-sidebar-layers.h
@@ -0,0 +1,58 @@
+/* ev-sidebar-layers.h
+ *  this file is part of evince, a gnome document viewer
+ *
+ * Copyright (C) 2008 Carlos Garcia Campos  <carlosgc@gnome.org>
+ *
+ * Evince is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * Evince is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#ifndef __EV_SIDEBAR_LAYERS_H__
+#define __EV_SIDEBAR_LAYERS_H__
+
+#include <gtk/gtk.h>
+#include <glib-object.h>
+
+G_BEGIN_DECLS
+
+typedef struct _EvSidebarLayers        EvSidebarLayers;
+typedef struct _EvSidebarLayersClass   EvSidebarLayersClass;
+typedef struct _EvSidebarLayersPrivate EvSidebarLayersPrivate;
+
+#define EV_TYPE_SIDEBAR_LAYERS              (ev_sidebar_layers_get_type())
+#define EV_SIDEBAR_LAYERS(object)           (G_TYPE_CHECK_INSTANCE_CAST((object), EV_TYPE_SIDEBAR_LAYERS, EvSidebarLayers))
+#define EV_SIDEBAR_LAYERS_CLASS(klass)      (G_TYPE_CHECK_CLASS_CAST((klass), EV_TYPE_SIDEBAR_LAYERS, EvSidebarLayersClass))
+#define EV_IS_SIDEBAR_LAYERS(object)        (G_TYPE_CHECK_INSTANCE_TYPE((object), EV_TYPE_SIDEBAR_LAYERS))
+#define EV_IS_SIDEBAR_LAYERS_CLASS(klass)   (G_TYPE_CHECK_CLASS_TYPE((klass), EV_TYPE_SIDEBAR_LAYERS))
+#define EV_SIDEBAR_LAYERS_GET_CLASS(object) (G_TYPE_INSTANCE_GET_CLASS((object), EV_TYPE_SIDEBAR_LAYERS, EvSidebarLayersClass))
+
+struct _EvSidebarLayers {
+	GtkVBox base_instance;
+
+	EvSidebarLayersPrivate *priv;
+};
+
+struct _EvSidebarLayersClass {
+	GtkVBoxClass base_class;
+
+	/* Signals */
+	void (* layers_visibility_changed) (EvSidebarLayers *ev_layers);
+};
+
+GType      ev_sidebar_layers_get_type (void) G_GNUC_CONST;
+GtkWidget *ev_sidebar_layers_new      (void);
+
+G_END_DECLS
+
+#endif /* __EV_SIDEBAR_LAYERS_H__ */
diff --git a/shell/ev-view.c b/shell/ev-view.c
index 41efa33..9c575d2 100644
--- a/shell/ev-view.c
+++ b/shell/ev-view.c
@@ -220,6 +220,9 @@ static void       draw_one_page                              (EvView
 static void	  draw_loading_text 			     (EvView             *view,
 							      GdkRectangle       *page_area,
 							      GdkRectangle       *expose_area);
+static void       ev_view_reload_page                        (EvView             *view,
+							      gint                page,
+							      GdkRegion          *region);
 
 /*** Callbacks ***/
 static void       job_finished_cb                            (EvPixbufCache      *pixbuf_cache,
@@ -1703,11 +1706,7 @@ ev_view_form_field_button_create_widget (EvView      *view,
 			break;
 	}
 
-	ev_pixbuf_cache_reload_page (view->pixbuf_cache,
-				     field_region,
-				     field->page->index,
-				     view->rotation,
-				     view->scale);
+	ev_view_reload_page (view, field->page->index, field_region);
 	gdk_region_destroy (field_region);
 	
 	return NULL;
@@ -1733,11 +1732,7 @@ ev_view_form_field_text_save (EvView    *view,
 		ev_document_forms_form_field_text_set_text (EV_DOCUMENT_FORMS (view->document),
 							    field, field_text->text);
 		field->changed = FALSE;
-		ev_pixbuf_cache_reload_page (view->pixbuf_cache,
-					     field_region,
-					     field->page->index,
-					     view->rotation,
-					     view->scale);
+		ev_view_reload_page (view, field->page->index, field_region);
 		gdk_region_destroy (field_region);
 	}
 }
@@ -1854,11 +1849,7 @@ ev_view_form_field_choice_save (EvView    *view,
 			}
 		}
 		field->changed = FALSE;
-		ev_pixbuf_cache_reload_page (view->pixbuf_cache,
-					     field_region,
-					     field->page->index,
-					     view->rotation,
-					     view->scale);
+		ev_view_reload_page (view, field->page->index, field_region);
 		gdk_region_destroy (field_region);
 	}
 }
@@ -4471,6 +4462,25 @@ ev_view_set_document (EvView     *view,
 	}
 }
 
+static void
+ev_view_reload_page (EvView    *view,
+		     gint       page,
+		     GdkRegion *region)
+{
+	ev_pixbuf_cache_reload_page (view->pixbuf_cache,
+				     region,
+				     page,
+				     view->rotation,
+				     view->scale);
+}
+
+void
+ev_view_reload (EvView *view)
+{
+	ev_pixbuf_cache_clear (view->pixbuf_cache);
+	view_update_range_and_current_page (view);
+}
+
 /*** Zoom and sizing mode ***/
 
 #define EPSILON 0.0000001
@@ -5871,7 +5881,7 @@ ev_view_previous_page (EvView *view)
 		return FALSE;
 	}
 }
-
+		
 /*** Enum description for usage in signal ***/
 
 GType
diff --git a/shell/ev-view.h b/shell/ev-view.h
index 424cecc..d41edd1 100644
--- a/shell/ev-view.h
+++ b/shell/ev-view.h
@@ -58,6 +58,8 @@ void		ev_view_set_document	  (EvView         *view,
 			   		   EvDocument     *document);
 void 		ev_view_set_loading       (EvView 	  *view,
 				           gboolean        loading);
+void            ev_view_reload            (EvView         *view);
+
 /* Clipboard */
 void		ev_view_copy		  (EvView         *view);
 void            ev_view_copy_link_address (EvView         *view,
diff --git a/shell/ev-window.c b/shell/ev-window.c
index 2e2e1bc..ef96dce 100644
--- a/shell/ev-window.c
+++ b/shell/ev-window.c
@@ -81,6 +81,7 @@
 #include "ev-sidebar-links.h"
 #include "ev-sidebar-page.h"
 #include "ev-sidebar-thumbnails.h"
+#include "ev-sidebar-layers.h"
 #include "ev-stock-icons.h"
 #include "ev-utils.h"
 #include "ev-view.h"
@@ -129,6 +130,7 @@ struct _EvWindowPrivate {
 	GtkWidget *sidebar_thumbs;
 	GtkWidget *sidebar_links;
 	GtkWidget *sidebar_attachments;
+	GtkWidget *sidebar_layers;
 
 	/* Dialogs */
 	GtkWidget *properties;
@@ -211,6 +213,7 @@ struct _EvWindowPrivate {
 #define LINKS_SIDEBAR_ID "links"
 #define THUMBNAILS_SIDEBAR_ID "thumbnails"
 #define ATTACHMENTS_SIDEBAR_ID "attachments"
+#define LAYERS_SIDEBAR_ID "layers"
 
 static const gchar *document_print_settings[] = {
 	GTK_PRINT_SETTINGS_N_COPIES,
@@ -906,6 +909,7 @@ setup_sidebar_from_metadata (EvWindow *window, EvDocument *document)
 	GtkWidget *links = window->priv->sidebar_links;
 	GtkWidget *thumbs = window->priv->sidebar_thumbs;
 	GtkWidget *attachments = window->priv->sidebar_attachments;
+	GtkWidget *layers = window->priv->sidebar_layers;
 	GValue sidebar_size = { 0, };
 	GValue sidebar_page = { 0, };
 	GValue sidebar_visibility = { 0, };
@@ -916,19 +920,29 @@ setup_sidebar_from_metadata (EvWindow *window, EvDocument *document)
 		g_value_unset(&sidebar_size);
 	}
 	
-	if (document && ev_metadata_manager_get (uri, "sidebar_page", &sidebar_page, FALSE)) {
+	if (document && ev_metadata_manager_get (uri, "sidebar_page", &sidebar_page, TRUE)) {
 		const char *page_id = g_value_get_string (&sidebar_page);
-		
+
 		if (strcmp (page_id, LINKS_SIDEBAR_ID) == 0 && ev_sidebar_page_support_document (EV_SIDEBAR_PAGE (links), document)) {
 			ev_sidebar_set_page (EV_SIDEBAR (sidebar), links);
-		} else if (strcmp (page_id, THUMBNAILS_SIDEBAR_ID) && ev_sidebar_page_support_document (EV_SIDEBAR_PAGE (thumbs), document)) {
+		} else if (strcmp (page_id, THUMBNAILS_SIDEBAR_ID) == 0 && ev_sidebar_page_support_document (EV_SIDEBAR_PAGE (thumbs), document)) {
 			ev_sidebar_set_page (EV_SIDEBAR (sidebar), thumbs);
-		} else if (strcmp (page_id, ATTACHMENTS_SIDEBAR_ID) && ev_sidebar_page_support_document (EV_SIDEBAR_PAGE (attachments), document)) {
+		} else if (strcmp (page_id, ATTACHMENTS_SIDEBAR_ID) == 0 && ev_sidebar_page_support_document (EV_SIDEBAR_PAGE (attachments), document)) {
 			ev_sidebar_set_page (EV_SIDEBAR (sidebar), attachments);
+		} else if (strcmp (page_id, LAYERS_SIDEBAR_ID) == 0 && ev_sidebar_page_support_document (EV_SIDEBAR_PAGE (layers), document)) {
+			ev_sidebar_set_page (EV_SIDEBAR (sidebar), layers);
 		}
 		g_value_unset (&sidebar_page);
-	} else if (document && ev_sidebar_page_support_document (EV_SIDEBAR_PAGE (links), document)) {
-		ev_sidebar_set_page (EV_SIDEBAR (sidebar), links);
+	} else if (document) {
+		if (ev_sidebar_page_support_document (EV_SIDEBAR_PAGE (links), document)) {
+			ev_sidebar_set_page (EV_SIDEBAR (sidebar), links);
+		} else if (ev_sidebar_page_support_document (EV_SIDEBAR_PAGE (thumbs), document)) {
+			ev_sidebar_set_page (EV_SIDEBAR (sidebar), thumbs);
+		} else if (ev_sidebar_page_support_document (EV_SIDEBAR_PAGE (attachments), document)) {
+			ev_sidebar_set_page (EV_SIDEBAR (sidebar), attachments);
+		} else if (ev_sidebar_page_support_document (EV_SIDEBAR_PAGE (layers), document)) {
+			ev_sidebar_set_page (EV_SIDEBAR (sidebar), layers);
+		}
 	}
 
 	if (ev_metadata_manager_get (uri, "sidebar_visibility", &sidebar_visibility, FALSE)) {
@@ -3819,6 +3833,8 @@ ev_window_sidebar_current_page_changed_cb (EvSidebar  *ev_sidebar,
 		id = THUMBNAILS_SIDEBAR_ID;
 	} else if (current_page == ev_window->priv->sidebar_attachments) {
 		id = ATTACHMENTS_SIDEBAR_ID;
+	} else if (current_page == ev_window->priv->sidebar_layers) {
+		id = LAYERS_SIDEBAR_ID;
 	} else {
 		g_assert_not_reached();
 	}
@@ -4593,6 +4609,13 @@ navigation_action_activate_link_cb (EvNavigationAction *action, EvLink *link, Ev
 }
 
 static void
+sidebar_layers_visibility_changed (EvSidebarLayers *layers,
+				   EvWindow        *window)
+{
+	ev_view_reload (EV_VIEW (window->priv->view));
+}
+
+static void
 register_custom_actions (EvWindow *window, GtkActionGroup *group)
 {
 	GtkAction *action;
@@ -5493,6 +5516,16 @@ ev_window_init (EvWindow *ev_window)
 	ev_sidebar_add_page (EV_SIDEBAR (ev_window->priv->sidebar),
 			     sidebar_widget);
 
+	sidebar_widget = ev_sidebar_layers_new ();
+	ev_window->priv->sidebar_layers = sidebar_widget;
+	g_signal_connect (sidebar_widget,
+			  "layers_visibility_changed",
+			  G_CALLBACK (sidebar_layers_visibility_changed),
+			  ev_window);
+	gtk_widget_show (sidebar_widget);
+	ev_sidebar_add_page (EV_SIDEBAR (ev_window->priv->sidebar),
+			     sidebar_widget);
+
 	ev_window->priv->view_box = gtk_vbox_new (FALSE, 0);
 	ev_window->priv->scrolled_window =
 		GTK_WIDGET (g_object_new (GTK_TYPE_SCROLLED_WINDOW,