First stab at showing windows in the overlay

shell-global.[ch]: Add shell_global_get_windows() to get
  the list of all MutterWindow for the  screen
Makefile.am: Include the metacity typelib so that we can
  reference the MutterWindow type
js/ui/overlay.js: Cascade the open windows, scaled down
  in the overlay

svn path=/trunk/; revision=24

src/Makefile.am

@@ -38,6 +38,7 @@ Shell-0.1.gir: libgnome-shell-introspect.la $(libgnome_shell_la_SOURCES)
 		--nsversion=0.1				\
 		--include=GObject-2.0			\
 		--include=Clutter-0.8			\
+		--include=Meta-2.25			\
 		--library=gnome-shell-introspect	\
 		$(libgnome_shell_la_SOURCES)		\
 		$(INCLUDES)				\

src/metacity-symbols.c

@@ -14,6 +14,11 @@ mutter_plugin_get_stage (MutterPlugin *plugin)
   return NULL;
 }
 
+GList *
+mutter_plugin_get_windows (MutterPlugin *plugin)
+{
+}
+
 void
 mutter_plugin_query_screen_size (MutterPlugin *plugin,
                                  int          *width,

src/shell-global.c

@@ -159,6 +159,21 @@ shell_global_set_stage_input_area (ShellGlobal *global,
   mutter_plugin_set_stage_input_area (global->plugin, x, y, width, height);
 }
 
+/**
+ * shell_global_get_windows:
+ *
+ * Gets the list of MutterWindows for the plugin's screen
+ *
+ * Return value: (element-type MutterWindow) (transfer none): the list of windows
+ */
+GList *
+shell_global_get_windows (ShellGlobal *global)
+{
+  g_return_if_fail (SHELL_IS_GLOBAL (global));
+
+  return mutter_plugin_get_windows (global->plugin);
+}
+
 void
 _shell_global_set_plugin (ShellGlobal  *global,
                           MutterPlugin *plugin)

src/shell-global.h

@@ -21,12 +21,13 @@ GType            shell_global_get_type            (void) G_GNUC_CONST;
 
 ShellGlobal *shell_global_get (void);
 
-void
-shell_global_set_stage_input_area (ShellGlobal *global,
-                                   int          x,
-                                   int          y,
-                                   int          width,
-                                   int          height);
+void shell_global_set_stage_input_area (ShellGlobal *global,
+					int          x,
+					int          y,
+					int          width,
+					int          height);
+
+GList *shell_global_get_windows (ShellGlobal *global);
 
 void _shell_global_set_plugin (ShellGlobal  *global,
 			       MutterPlugin *plugin);