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[virt-tools-list] [PATCH 3/3] virt-viewer-display-spice: Use display monitor property for fullscreen size

When a display is pinned to a certain monitor for fullscreen, it will be moved
there when going fullscreen. Currently we use gdk_screen_get_monitor_at_window
to determine which monitor we are on and get the size from that monitor.

But this is racy, sometimes the size_allocate function runs before the move
has finished and we get the size from the wrong monitor:

Since if the display is pinned to a certain monitor, the display will always
end up on that monitor we can avoid the race by simply using that monitors

Signed-off-by: Hans de Goede <hdegoede redhat com>
 src/virt-viewer-display-spice.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/virt-viewer-display-spice.c b/src/virt-viewer-display-spice.c
index 1e17ca5..9fadcc6 100644
--- a/src/virt-viewer-display-spice.c
+++ b/src/virt-viewer-display-spice.c
@@ -201,7 +201,9 @@ virt_viewer_display_spice_size_allocate(VirtViewerDisplaySpice *self,
     if (self->priv->auto_resize == AUTO_RESIZE_FULLSCREEN) {
         GdkRectangle monitor;
         GdkScreen *screen = gtk_widget_get_screen(GTK_WIDGET(self));
-        int n = gdk_screen_get_monitor_at_window(screen,
+        int n = virt_viewer_display_get_monitor(VIRT_VIEWER_DISPLAY(self));
+        if (n == -1)
+            n = gdk_screen_get_monitor_at_window(screen,
         gdk_screen_get_monitor_geometry(screen, n, &monitor);
         disable_display_position = FALSE;

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