[mutter/issue157: 5/5] backends: Don't center the pointer on initialization

[Ray Strode <halfline src gnome org>]

commit a95cbd0acae15d8c3aeb23da583e4ece60110d87
Author: Mario Sanchez Prada <mario endlessm com>
Date:   Mon Apr 16 21:01:12 2018 +0100

    backends: Don't center the pointer on initialization
    
    Centering the pointer at startup causes undesired behaviour if
    it ends up hovering over reactive elements, that might react
    to that positioning, causing confusion. This is the case of
    the login dialog when a list of different users is shown, as
    centering the pointer at startup in that case will get the
    user in the center of the screen pre-selected, which is not
    the expected behaviour (i.e. pre-selecting the first one).
    
    Fix this by simply moving the pointer out of the way, close
    to the bottom-right corner, during initialization.
    
    Closes: https://gitlab.gnome.org/GNOME/gnome-shell/issues/157

 src/backends/meta-backend.c | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)
---
diff --git a/src/backends/meta-backend.c b/src/backends/meta-backend.c
index 1c44b9c7f..a5d3c9a6c 100644
--- a/src/backends/meta-backend.c
+++ b/src/backends/meta-backend.c
@@ -479,7 +479,18 @@ meta_backend_real_post_init (MetaBackend *backend)
 
   if (!meta_monitor_manager_is_headless (priv->monitor_manager))
     {
-      center_pointer (backend);
+      MetaMonitorManager *monitor_manager = priv->monitor_manager;
+      MetaLogicalMonitor *primary;
+
+      primary =
+        meta_monitor_manager_get_primary_logical_monitor (monitor_manager);
+
+      /* Move the pointer out of the way to avoid hovering over reactive
+       * elements (e.g. users list at login) causing undesired behaviour. */
+      meta_backend_warp_pointer (backend,
+                                 primary->rect.x + primary->rect.width * 0.9,
+                                 primary->rect.y + primary->rect.height * 0.9);
+
       priv->is_pointer_position_initialized = TRUE;
     }
 }