[mutter/wip/carlosg/tablet-mapping-fixes: 2/3] backends: Only default to builtin panel on touchscreen devices

[Carlos Garnacho <carlosg src gnome org>]

commit 737ddd56a2f6e3d15aea288c7f801b2227f1c5d4
Author: Carlos Garnacho <carlosg gnome org>
Date:   Wed Nov 24 18:34:31 2021 +0100

    backends: Only default to builtin panel on touchscreen devices
    
    Non-display-attached tablets (e.g. Intuos) may find no match, which
    should mean "use the span of all monitors", not "pick one for me".
    Reserve this fallback to touchscreen devices, since these might
    still benefit from it.

 src/backends/meta-input-mapper.c | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)
---
diff --git a/src/backends/meta-input-mapper.c b/src/backends/meta-input-mapper.c
index 9760bacc2d..826552b071 100644
--- a/src/backends/meta-input-mapper.c
+++ b/src/backends/meta-input-mapper.c
@@ -536,13 +536,16 @@ guess_candidates (MetaInputMapper     *mapper,
 
   if (info->matches->len == 0)
     {
-      DeviceMatch match = { 0 };
+      if (clutter_input_device_get_device_type (input->device) == CLUTTER_TOUCHSCREEN_DEVICE)
+        {
+          DeviceMatch match = { 0 };
 
-      match.monitor =
-        meta_monitor_manager_get_laptop_panel (mapper->monitor_manager);
+          match.monitor =
+            meta_monitor_manager_get_laptop_panel (mapper->monitor_manager);
 
-      if (match.monitor != NULL)
-        g_array_append_val (info->matches, match);
+          if (match.monitor != NULL)
+            g_array_append_val (info->matches, match);
+        }
 
       info->best = 0;
     }