[mutter] Improve debug logging of Wayland windows

[Owen Taylor <otaylor src gnome org>]

commit 1ab8b854dff3452a708189e980ca84aebfc59984
Author: Owen W. Taylor <otaylor fishsoup net>
Date:   Mon Oct 12 08:04:55 2015 -0400

    Improve debug logging of Wayland windows
    
    Displaying all Wayland windows with the XID of 0x0 makes it hard
    to figure out what is going on ... use the recently-added
    window->stamp to show Wayland windows as W1/W2/W3...

 src/core/window.c |   18 +++++++++++++++---
 1 files changed, 15 insertions(+), 3 deletions(-)
---
diff --git a/src/core/window.c b/src/core/window.c
index 8cbbfaf..d075cab 100644
--- a/src/core/window.c
+++ b/src/core/window.c
@@ -763,10 +763,22 @@ meta_window_update_desc (MetaWindow *window)
 {
   g_clear_pointer (&window->desc, g_free);
 
-  if (window->title)
-    window->desc = g_strdup_printf ("0x%lx (%.10s)", window->xwindow, window->title);
+  if (window->client_type == META_WINDOW_CLIENT_TYPE_X11)
+    {
+      if (window->title)
+        window->desc = g_strdup_printf ("0x%lx (%.10s)", window->xwindow, window->title);
+      else
+        window->desc = g_strdup_printf ("0x%lx", window->xwindow);
+    }
   else
-    window->desc = g_strdup_printf ("0x%lx", window->xwindow);
+    {
+      guint64 small_stamp = window->stamp - G_GUINT64_CONSTANT(0x100000000);
+
+      if (window->title)
+        window->desc = g_strdup_printf ("W%" G_GUINT64_FORMAT " (%.10s)", small_stamp, window->title);
+      else
+        window->desc = g_strdup_printf ("W%" G_GUINT64_FORMAT , small_stamp);
+    }
 }
 
 static void