[nautilus] css: fix commit 7f0e1b0c6869eb

[Carlos Soriano Sánchez <csoriano src gnome org>]

commit 10189e9b78af00a3a61457b296b992cd946ce4ab
Author: Carlos Soriano <csoriano gnome org>
Date:   Thu Jan 21 10:54:49 2016 +0100

    css: fix commit 7f0e1b0c6869eb
    
    I pushed the unfinished patch in a wrong checkout.
    Push the faulty bits needed to make it complete.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=760790

 src/nautilus-application.c |   14 ++++++++++----
 1 files changed, 10 insertions(+), 4 deletions(-)
---
diff --git a/src/nautilus-application.c b/src/nautilus-application.c
index f9ae2cf..75de58f 100644
--- a/src/nautilus-application.c
+++ b/src/nautilus-application.c
@@ -1099,6 +1099,7 @@ static void
 theme_changed (GtkSettings *settings)
 {
        static GtkCssProvider *provider = NULL;
+       static GtkCssProvider *permanent_provider = NULL;
        gchar *theme;
        GdkScreen *screen;
        GFile *file;
@@ -1107,10 +1108,15 @@ theme_changed (GtkSettings *settings)
        screen = gdk_screen_get_default ();
 
        /* CSS we want to always load for any theme */
-       provider = gtk_css_provider_new ();
-       file = g_file_new_for_uri ("resource:///org/gnome/nautilus/css/nautilus.css");
-       gtk_css_provider_load_from_file (provider, file, NULL);
-       g_object_unref (file);
+       if (permanent_provider == NULL) {
+               permanent_provider = gtk_css_provider_new ();
+               file = g_file_new_for_uri ("resource:///org/gnome/nautilus/css/nautilus.css");
+               gtk_css_provider_load_from_file (permanent_provider, file, NULL);
+               gtk_style_context_add_provider_for_screen (screen,
+                                                          GTK_STYLE_PROVIDER (permanent_provider),
+                                                          GTK_STYLE_PROVIDER_PRIORITY_APPLICATION);
+               g_object_unref (file);
+       }
 
        /* CSS that themes can override */
        if (g_str_equal (theme, "Adwaita"))