[evince] sidebar: select correct page after reloading

[Carlos Garcia Campos <carlosgc src gnome org>]

commit 65877a01ec9b8326176d9cd3f1e25ec338bbd754
Author: Giselle Machado <giselle mnr gmail com>
Date:   Wed Apr 30 00:33:59 2014 +0200

    sidebar: select correct page after reloading
    
    Once a document is reloaded, if the current
    sidebar page is no longer supported, it should
    change to the first supported page. Otherwise, it
    does not change pages.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=628617

 shell/ev-sidebar.c |   24 +++++++++++++++++++-----
 1 files changed, 19 insertions(+), 5 deletions(-)
---
diff --git a/shell/ev-sidebar.c b/shell/ev-sidebar.c
index cc2a00e..c9f72c1 100644
--- a/shell/ev-sidebar.c
+++ b/shell/ev-sidebar.c
@@ -484,6 +484,16 @@ ev_sidebar_add_page (EvSidebar   *ev_sidebar,
        g_free (label_title);
 }
 
+static gboolean
+ev_sidebar_current_page_support_document (EvSidebar  *sidebar,
+                                          EvDocument *document)
+{
+       GtkWidget *current_page = ev_sidebar_get_current_page (sidebar);
+
+       return ev_sidebar_page_support_document (EV_SIDEBAR_PAGE (current_page), document);
+}
+
+
 static void
 ev_sidebar_document_changed_cb (EvDocumentModel *model,
                                GParamSpec      *pspec,
@@ -493,7 +503,7 @@ ev_sidebar_document_changed_cb (EvDocumentModel *model,
        EvDocument *document = ev_document_model_get_document (model);
        GtkTreeIter iter;
        gboolean valid;
-       gboolean has_pages = FALSE;
+       GtkWidget *first_supported_page = NULL;
 
        for (valid = gtk_tree_model_get_iter_first (priv->page_model, &iter);
             valid;
@@ -507,8 +517,9 @@ ev_sidebar_document_changed_cb (EvDocumentModel *model,
                                    -1);
 
                if (ev_sidebar_page_support_document (EV_SIDEBAR_PAGE (widget), document)) {
-                       has_pages = TRUE;
                        gtk_widget_set_sensitive (menu_widget, TRUE);
+                       if (!first_supported_page)
+                                first_supported_page = widget;
                } else {
                        gtk_widget_set_sensitive (menu_widget, FALSE);
                }
@@ -516,11 +527,14 @@ ev_sidebar_document_changed_cb (EvDocumentModel *model,
                g_object_unref (menu_widget);
        }
 
-       if (!has_pages) {
-               gtk_widget_hide (GTK_WIDGET (sidebar));
-       } else {
+       if (first_supported_page != NULL) {
+               if (!ev_sidebar_current_page_support_document (sidebar, document)) {
+                       ev_sidebar_set_page (sidebar, first_supported_page);
+               }
                gtk_widget_set_sensitive (GTK_WIDGET (sidebar->priv->notebook), TRUE);
                gtk_widget_set_sensitive (GTK_WIDGET (sidebar->priv->select_button), TRUE);
+       } else {
+               gtk_widget_hide (GTK_WIDGET (sidebar));
        }
 }