[gnome-software] Improve back button behaviour

[Matthias Clasen <matthiasc src gnome org>]

commit ce2bdd002bf9919fb884f34abc0574a67ae50e39
Author: Matthias Clasen <mclasen redhat com>
Date:   Fri Sep 20 17:38:12 2013 -0400

    Improve back button behaviour
    
    Maintain the previous focus when coming back via the back
    button. Keyboard users all over the world love it.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=708492

 src/gs-shell.c |    9 +++++++++
 1 files changed, 9 insertions(+), 0 deletions(-)
---
diff --git a/src/gs-shell.c b/src/gs-shell.c
index d3b2586..ed0f285 100644
--- a/src/gs-shell.c
+++ b/src/gs-shell.c
@@ -39,6 +39,7 @@ static void   gs_shell_finalize       (GObject        *object);
 
 typedef struct {
        GsShellMode      mode;
+       GtkWidget       *focus;
        GsApp           *app;
        GsCategory      *category;
 } BackEntry;
@@ -183,6 +184,7 @@ save_back_entry (GsShell *shell)
 {
        GsShellPrivate *priv = shell->priv;
        BackEntry *entry;
+       GtkWidget *window;
 
        entry = g_new0 (BackEntry, 1);
        entry->mode = priv->mode;
@@ -196,6 +198,9 @@ save_back_entry (GsShell *shell)
                g_object_ref (entry->app);
        }
 
+       window = GTK_WIDGET (gtk_builder_get_object (priv->builder, "window_software"));
+       entry->focus = gtk_window_get_focus (GTK_WINDOW (window));
+
        priv->back_entry_stack = g_slist_prepend (priv->back_entry_stack, entry);
 }
 
@@ -222,6 +227,10 @@ gs_shell_back_button_cb (GtkWidget *widget, GsShell *shell)
 
        gs_shell_change_mode (shell, entry->mode, entry->app, entry->category, FALSE);
 
+       if (entry->focus) {
+               gtk_widget_grab_focus (entry->focus);
+       }
+
        free_back_entry (entry);
 }