[gnome-shell/wip/wayland: 50/53] ShellGlobal: use a different window for IBus when running on wayland

[Giovanni Campagna <gcampagna src gnome org>]

commit 228cf0293f32f649337527dd4c9093bbdd46095e
Author: Giovanni Campagna <gcampagn redhat com>
Date:   Wed Sep 11 17:53:58 2013 +0200

    ShellGlobal: use a different window for IBus when running on wayland
    
    When running as a wayland compositor, the clutter stage doesn't
    have an usable window for IPC, so just create another one.
    
    Also, disable freezing the keyboard when running on wayland, as
    we can't do it really.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=707467

 src/shell-global.c |   36 ++++++++++++++++++++++++++++++++----
 1 files changed, 32 insertions(+), 4 deletions(-)
---
diff --git a/src/shell-global.c b/src/shell-global.c
index 65994ec..97cdebd 100644
--- a/src/shell-global.c
+++ b/src/shell-global.c
@@ -847,9 +847,36 @@ _shell_global_set_plugin (ShellGlobal *global,
                                                meta_screen_get_screen_number (global->meta_screen));
 
   global->stage = CLUTTER_STAGE (meta_get_stage_for_screen (global->meta_screen));
-  global->stage_xwindow = clutter_x11_get_stage_window (global->stage);
-  global->ibus_window = gdk_x11_window_foreign_new_for_display (global->gdk_display,
-                                                                global->stage_xwindow);
+
+#ifdef HAVE_WAYLAND
+  if (meta_is_wayland_compositor ())
+    {
+      /* When Mutter is acting as its own display server then the
+         stage does not have a window, so create a different window
+         which we use to communicate with IBus, and leave stage_xwindow
+         as None.
+      */
+
+      GdkWindowAttr attributes;
+
+      attributes.wclass = GDK_INPUT_OUTPUT;
+      attributes.width = 100;
+      attributes.height = 100;
+      attributes.window_type = GDK_WINDOW_TOPLEVEL;
+
+      global->ibus_window = gdk_window_new (NULL,
+                                            &attributes,
+                                            0 /* attributes_mask */);
+      global->stage_xwindow = None;
+    }
+  else
+#endif
+    {
+      global->stage_xwindow = clutter_x11_get_stage_window (global->stage);
+      global->ibus_window = gdk_x11_window_foreign_new_for_display (global->gdk_display,
+                                                                    global->stage_xwindow);
+    }
+
   st_im_text_set_event_window (global->ibus_window);
 
   g_signal_connect (global->stage, "notify::width",
@@ -954,7 +981,8 @@ void
 shell_global_freeze_keyboard (ShellGlobal *global,
                               guint32      timestamp)
 {
-  meta_display_freeze_keyboard (global->meta_display, global->stage_xwindow, timestamp);
+  if (global->stage_xwindow != None)
+    meta_display_freeze_keyboard (global->meta_display, global->stage_xwindow, timestamp);
 }
 
 /* Code to close all file descriptors before we exec; copied from gspawn.c in GLib.