[gtk+] csd: add style classes for tiled and maximized

[Matthias Clasen <matthiasc src gnome org>]

commit d6c866b6e54ecc23417359a07b6f825c6b80eeee
Author: Matthias Clasen <mclasen redhat com>
Date:   Sun Oct 6 00:35:05 2013 -0400

    csd: add style classes for tiled and maximized
    
    This lets us change the border radius when the window is
    in one of these states.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=709215

 gtk/gtkwindow.c |   20 ++++++++++++++++++++
 1 files changed, 20 insertions(+), 0 deletions(-)
---
diff --git a/gtk/gtkwindow.c b/gtk/gtkwindow.c
index 8686079..19ec2a4 100644
--- a/gtk/gtkwindow.c
+++ b/gtk/gtkwindow.c
@@ -6253,6 +6253,25 @@ add_window_frame_style_class (GtkStyleContext *context)
 }
 
 static void
+update_window_style_classes (GtkWindow *window)
+{
+  GtkWindowPrivate *priv = window->priv;
+  GtkStyleContext *context;
+
+  context = gtk_widget_get_style_context (GTK_WIDGET (window));
+
+  if (priv->tiled)
+    gtk_style_context_add_class (context, "tiled");
+  else
+    gtk_style_context_remove_class (context, "tiled");
+
+  if (gtk_window_get_maximized (window))
+    gtk_style_context_add_class (context, "maximized");
+  else
+    gtk_style_context_remove_class (context, "maximized");
+}
+
+static void
 get_decoration_size (GtkWidget *widget,
                      GtkBorder *decorations)
 {
@@ -6878,6 +6897,7 @@ gtk_window_state_event (GtkWidget           *widget,
 
   if (event->changed_mask & (GDK_WINDOW_STATE_FULLSCREEN | GDK_WINDOW_STATE_MAXIMIZED | 
GDK_WINDOW_STATE_TILED))
     {
+      update_window_style_classes (window);
       update_window_buttons (window);
       gtk_widget_queue_resize (widget);
     }