[mutter] window/wayland: Detect client resizes with pending non-resizes

[Marge Bot <marge-bot src gnome org>]

commit d66e3e2d8a0ae5e1fb4a145c7d05148325b6165e
Author: Sebastian Keller <skeller gnome org>
Date:   Mon Nov 22 07:42:08 2021 +0100

    window/wayland: Detect client resizes with pending non-resizes
    
    The previous code was trying to detect client resizes by only
    considering resizes without any pending configurations as client
    resizes. There can however be pending configurations that do not involve
    resizing, such as ones triggered by state changes. These may also stay
    unacknowledged by the client until the next size change. This was
    causing client resizes after showing the window (and therefore changing
    its status to focused) to not be detected as client resize.
    
    Fix this by checking whether the queue has any configuration with size
    changes rather than just whether it is empty.
    
    Fixes: https://gitlab.gnome.org/GNOME/mutter/-/issues/2023
    Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2103>

 src/wayland/meta-window-wayland.c | 18 +++++++++++++++++-
 1 file changed, 17 insertions(+), 1 deletion(-)
---
diff --git a/src/wayland/meta-window-wayland.c b/src/wayland/meta-window-wayland.c
index 0927fabddd..fb7198e8b7 100644
--- a/src/wayland/meta-window-wayland.c
+++ b/src/wayland/meta-window-wayland.c
@@ -861,6 +861,22 @@ acquire_acked_configuration (MetaWindowWayland       *wl_window,
   return NULL;
 }
 
+static gboolean
+has_pending_resize (MetaWindowWayland *wl_window)
+{
+  GList *l;
+
+  for (l = wl_window->pending_configurations; l; l = l->next)
+    {
+      MetaWaylandWindowConfiguration *configuration = l->data;
+
+      if (configuration->has_size)
+        return TRUE;
+    }
+
+  return FALSE;
+}
+
 int
 meta_window_wayland_get_geometry_scale (MetaWindow *window)
 {
@@ -944,7 +960,7 @@ meta_window_wayland_finish_move_resize (MetaWindow              *window,
 
   flags = META_MOVE_RESIZE_WAYLAND_FINISH_MOVE_RESIZE;
 
-  if (!wl_window->pending_configurations)
+  if (!has_pending_resize (wl_window))
     flags |= META_MOVE_RESIZE_WAYLAND_CLIENT_RESIZE;
 
   acked_configuration = acquire_acked_configuration (wl_window, pending);