[mutter] window/wayland: Don't initialize a window as showing

[Florian Müllner <fmuellner src gnome org>]

commit 49780245f4187a438cd311cb2faab0069bd075ba
Author: Jonas Ådahl <jadahl gmail com>
Date:   Fri Oct 5 15:31:46 2018 +0200

    window/wayland: Don't initialize a window as showing
    
    With Wayland, a window is not showing until it's shown. Until this
    patch, the initial state of MetaWindow, on the other hand, was that a
    window is initialized as showing. This means that for a window to
    actually be classified as shown (MetaWindow::hidden set to FALSE),
    something would first have to hide it.
    
    Normally, this wasn't an issue, as normally we'd first create a window,
    determine it shouldn't be visible (due to missing buffer), hide it
    before the next paint, then eventually show it. This doesn't work if
    mutter isn't drawing any frames at the moment (e.g. the user switched
    VT), as we'd miss the hiding before showing as e result of a buffer
    being attached. The most visible side effect is that a window can't be
    moved as the window actor remains frozen.
    
    This commit fixes this issue by correctly classifying a newly created
    Wayland window as "hidden".
    
    Fixes: https://gitlab.gnome.org/GNOME/mutter/issues/331

 src/core/window.c | 16 +++++++++++-----
 1 file changed, 11 insertions(+), 5 deletions(-)
---
diff --git a/src/core/window.c b/src/core/window.c
index 2e24e4ed2..79f0b2e39 100644
--- a/src/core/window.c
+++ b/src/core/window.c
@@ -1045,7 +1045,6 @@ _meta_window_shared_new (MetaDisplay         *display,
   window->tab_unminimized = FALSE;
   window->iconic = FALSE;
   window->mapped = attrs->map_state != IsUnmapped;
-  window->hidden = FALSE;
   window->known_to_compositor = FALSE;
   window->visible_to_compositor = FALSE;
   window->pending_compositor_effect = effect;
@@ -1084,10 +1083,17 @@ _meta_window_shared_new (MetaDisplay         *display,
   window->mwm_has_move_func = TRUE;
   window->mwm_has_resize_func = TRUE;
 
-  if (client_type == META_WINDOW_CLIENT_TYPE_X11)
-    window->decorated = TRUE;
-  else
-    window->decorated = FALSE;
+  switch (client_type)
+    {
+    case META_WINDOW_CLIENT_TYPE_X11:
+      window->decorated = TRUE;
+      window->hidden = FALSE;
+      break;
+    case META_WINDOW_CLIENT_TYPE_WAYLAND:
+      window->decorated = FALSE;
+      window->hidden = TRUE;
+      break;
+    }
 
   window->has_close_func = TRUE;
   window->has_minimize_func = TRUE;