[mutter] window: do not force placing window if it is not mapped

[Jonas Ådahl <jadahl src gnome org>]

commit 99c0b82b15fb85471cf36f43c10f26dedaf0aa13
Author: Marek Chalupa <mchqwerty gmail com>
Date:   Fri Jul 10 17:24:55 2015 +0200

    window: do not force placing window if it is not mapped
    
    When managing window, we queue showing the window.
    Under wayland, if we commit surface quickly enough,
    the showing is unqueued and commit procedure takes care
    of mapping and placing the window. In the oposite case,
    queue is processed before client sets all we need and
    then we have wrong size of window, which leads to broken placement.
    Therefore force placement in queue only if the window should already
    be mapped. If it is not mapped, we don't care where it is anyway.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=751887

 src/core/window.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)
---
diff --git a/src/core/window.c b/src/core/window.c
index 69ea968..9604a7d 100644
--- a/src/core/window.c
+++ b/src/core/window.c
@@ -1579,8 +1579,10 @@ implement_showing (MetaWindow *window,
        * windows we might want to know where they are on the screen,
        * so we should place the window even if we're hiding it rather
        * than showing it.
+       * Force placing windows only when they should be already mapped,
+       * see #751887
        */
-      if (!window->placed)
+      if (!window->placed && client_window_should_be_mapped (window))
         meta_window_force_placement (window);
 
       meta_window_hide (window);