[evince] sidebar-thumbnails: fix unwanted move to start after fullscreen

[Nelson Benítez León <nbenitez src gnome org>]

commit 2bfb8fa7c2b253a2aa3cb161a694b95ef84c4b31
Author: Nelson Benítez León <nbenitezl+gnome gmail com>
Date:   Sun Jun 4 18:08:29 2017 +0500

    sidebar-thumbnails: fix unwanted move to start after fullscreen
    
    After activating or deactivating fullscreen mode, the sidebar
    window is automatically moved to its start, while scroll bar
    stays in its original position.
    
    The sidebar window move is unwanted and unsolicited, and it's
    most probably caused by GtkIconView or GtkScrolledWindow bug.
    
    Workaround this by having the sidebar sync its window with the
    current scroll position after a fullscreen operation, do that by
    just emitting a "value-changed" on the current scroll adjustment.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=783404

 shell/ev-sidebar-thumbnails.c |   20 ++++++++++++++++++++
 1 files changed, 20 insertions(+), 0 deletions(-)
---
diff --git a/shell/ev-sidebar-thumbnails.c b/shell/ev-sidebar-thumbnails.c
index 7822c27..339769c 100644
--- a/shell/ev-sidebar-thumbnails.c
+++ b/shell/ev-sidebar-thumbnails.c
@@ -323,6 +323,23 @@ ev_sidebar_thumbnails_map (GtkWidget *widget)
 }
 
 static void
+ev_sidebar_fullscreen_cb (EvSidebarThumbnails *sidebar)
+{
+       /* After activating or deactivating fullscreen mode, the sidebar
+        * window is automatically moved to its start, while scroll bar
+        * stays in its original position.
+        *
+        * The sidebar window move is unwanted and unsolicited, and it's
+        * most probably caused by GtkIconView or GtkScrolledWindow bug.
+        *
+        * Workaround this by having the sidebar sync its window with the
+        * current scroll position after a fullscreen operation, do that by
+        * just emitting a "value-changed" on the current scroll adjustment.
+        * Fixes https://bugzilla.gnome.org/show_bug.cgi?id=783404 */
+       g_signal_emit_by_name (sidebar->priv->vadjustment, "value-changed");
+}
+
+static void
 ev_sidebar_thumbnails_size_allocate (GtkWidget     *widget,
                                      GtkAllocation *allocation)
 {
@@ -1051,6 +1068,9 @@ ev_sidebar_thumbnails_document_changed_cb (EvDocumentModel     *model,
        g_signal_connect (priv->model, "notify::inverted-colors",
                          G_CALLBACK (ev_sidebar_thumbnails_inverted_colors_changed_cb),
                          sidebar_thumbnails);
+       g_signal_connect_swapped (priv->model, "notify::fullscreen",
+                                 G_CALLBACK (ev_sidebar_fullscreen_cb),
+                                 sidebar_thumbnails);
        sidebar_thumbnails->priv->start_page = -1;
        sidebar_thumbnails->priv->end_page = -1;
        ev_sidebar_thumbnails_set_current_page (sidebar_thumbnails,