mutter/SOURCES/0001-backends-Check-both-input-settings-and-mapper-for-ta.patch

From 20fcc3e045287c1ca591f3e795b19e120479a89a Mon Sep 17 00:00:00 2001
From: Carlos Garnacho <carlosg@gnome.org>
Date: Wed, 12 Feb 2020 20:26:56 +0100
Subject: [PATCH 1/2] backends/x11: Implement is_grouped for X11

If the devices have a wacom description, compare those. Otherwise,
look up the devices' VID:PID, if they match they should also be
grouped.

https://gitlab.gnome.org/GNOME/mutter/merge_requests/971
---
 .../clutter/x11/clutter-input-device-xi2.c    | 25 +++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/clutter/clutter/x11/clutter-input-device-xi2.c b/clutter/clutter/x11/clutter-input-device-xi2.c
index ae2fa27..9eca34d 100644
--- a/clutter/clutter/x11/clutter-input-device-xi2.c
+++ b/clutter/clutter/x11/clutter-input-device-xi2.c
@@ -98,6 +98,31 @@ static gboolean
 clutter_input_device_xi2_is_grouped (ClutterInputDevice *device,
                                      ClutterInputDevice *other_device)
 {
+#ifdef HAVE_LIBWACOM
+  ClutterInputDeviceXI2 *device_x11 = CLUTTER_INPUT_DEVICE_XI2 (device);
+  ClutterInputDeviceXI2 *other_device_x11 = CLUTTER_INPUT_DEVICE_XI2 (other_device);
+
+  if (device_x11->wacom_device &&
+      other_device_x11->wacom_device &&
+      libwacom_compare (device_x11->wacom_device,
+                        other_device_x11->wacom_device,
+                        WCOMPARE_NORMAL) == 0)
+    return TRUE;
+#endif
+
+  /* Devices with the same VID:PID get grouped together */
+  if (clutter_input_device_get_vendor_id (device) &&
+      clutter_input_device_get_product_id (device) &&
+      clutter_input_device_get_vendor_id (other_device) &&
+      clutter_input_device_get_product_id (other_device))
+    {
+      if (strcmp (clutter_input_device_get_vendor_id (device),
+                  clutter_input_device_get_vendor_id (other_device)) == 0 &&
+          strcmp (clutter_input_device_get_product_id (device),
+                  clutter_input_device_get_product_id (other_device)) == 0)
+        return TRUE;
+    }
+
   return FALSE;
 }
 
-- 
2.24.1


From 5914ab9ac79ce42da054036c4a8f118a3a868cc0 Mon Sep 17 00:00:00 2001
From: Carlos Garnacho <carlosg@gnome.org>
Date: Fri, 13 Dec 2019 15:26:05 +0100
Subject: [PATCH 2/2] backends: Check both input settings and mapper for tablet
 monitors

The upper layers (OSDs basically) want to know the monitor that a
tablet is currently assigned to, not the monitor just as configured
through settings.

This broke proper OSD positioning for display-attached tablets since
commit 87858a4e01d9, as the MetaInputMapper kicks in precisely when
there is no configured monitor for the given device.

Consulting both about the assigned output will make OSDs pop up
again in the right place.

https://gitlab.gnome.org/GNOME/mutter/merge_requests/971
---
 src/backends/meta-input-mapper-private.h |  3 ++
 src/backends/meta-input-mapper.c         | 26 ++++++++++++
 src/backends/meta-input-settings.c       | 54 +++++++++++++++++++++++-
 3 files changed, 81 insertions(+), 2 deletions(-)

diff --git a/src/backends/meta-input-mapper-private.h b/src/backends/meta-input-mapper-private.h
index 3431457..cdfdccd 100644
--- a/src/backends/meta-input-mapper-private.h
+++ b/src/backends/meta-input-mapper-private.h
@@ -42,5 +42,8 @@ ClutterInputDevice *
 meta_input_mapper_get_logical_monitor_device (MetaInputMapper        *mapper,
                                               MetaLogicalMonitor     *logical_monitor,
                                               ClutterInputDeviceType  device_type);
+MetaLogicalMonitor *
+meta_input_mapper_get_device_logical_monitor (MetaInputMapper *mapper,
+                                              ClutterInputDevice *device);
 
 #endif /* META_INPUT_MAPPER_H */
diff --git a/src/backends/meta-input-mapper.c b/src/backends/meta-input-mapper.c
index fc4f3bd..fe02ab8 100644
--- a/src/backends/meta-input-mapper.c
+++ b/src/backends/meta-input-mapper.c
@@ -675,3 +675,29 @@ meta_input_mapper_get_logical_monitor_device (MetaInputMapper        *mapper,
 
   return NULL;
 }
+
+MetaLogicalMonitor *
+meta_input_mapper_get_device_logical_monitor (MetaInputMapper    *mapper,
+                                              ClutterInputDevice *device)
+{
+  MetaMapperOutputInfo *output;
+  MetaLogicalMonitor *logical_monitor;
+  GHashTableIter iter;
+  GList *l;
+
+  g_hash_table_iter_init (&iter, mapper->output_devices);
+
+  while (g_hash_table_iter_next (&iter, (gpointer *) &logical_monitor,
+                                 (gpointer *) &output))
+    {
+      for (l = output->input_devices; l; l = l->next)
+        {
+          MetaMapperInputInfo *input = l->data;
+
+          if (input->device == device)
+            return logical_monitor;
+        }
+    }
+
+  return NULL;
+}
diff --git a/src/backends/meta-input-settings.c b/src/backends/meta-input-settings.c
index b84595e..ab80bee 100644
--- a/src/backends/meta-input-settings.c
+++ b/src/backends/meta-input-settings.c
@@ -1937,6 +1937,42 @@ meta_input_settings_get_tablet_settings (MetaInputSettings  *settings,
   return info ? g_object_ref (info->settings) : NULL;
 }
 
+static ClutterInputDevice *
+find_grouped_pen (MetaInputSettings  *settings,
+                  ClutterInputDevice *device)
+{
+  MetaInputSettingsPrivate *priv;
+  GSList *l, *devices;
+  ClutterInputDeviceType device_type;
+  ClutterInputDevice *pen = NULL;
+
+  device_type = clutter_input_device_get_device_type (device);
+
+  if (device_type == CLUTTER_TABLET_DEVICE ||
+      device_type == CLUTTER_PEN_DEVICE)
+    return device;
+
+  priv = meta_input_settings_get_instance_private (settings);
+  devices = clutter_device_manager_peek_devices (priv->device_manager);
+
+  for (l = devices; l; l = l->next)
+    {
+      ClutterInputDevice *device = l->data;
+
+      device_type = clutter_input_device_get_device_type (l->data);
+
+      if ((device_type == CLUTTER_TABLET_DEVICE ||
+           device_type == CLUTTER_PEN_DEVICE) &&
+          clutter_input_device_is_grouped (device, l->data))
+        {
+          pen = l->data;
+          break;
+        }
+    }
+
+  return pen;
+}
+
 MetaLogicalMonitor *
 meta_input_settings_get_tablet_logical_monitor (MetaInputSettings  *settings,
                                                 ClutterInputDevice *device)
@@ -1948,13 +1984,27 @@ meta_input_settings_get_tablet_logical_monitor (MetaInputSettings  *settings,
   g_return_val_if_fail (META_IS_INPUT_SETTINGS (settings), NULL);
   g_return_val_if_fail (CLUTTER_IS_INPUT_DEVICE (device), NULL);
 
+  if (clutter_input_device_get_device_type (device) == CLUTTER_PAD_DEVICE)
+    {
+      device = find_grouped_pen (settings, device);
+      if (!device)
+        return NULL;
+    }
+
   priv = meta_input_settings_get_instance_private (settings);
   info = g_hash_table_lookup (priv->mappable_devices, device);
   if (!info)
     return NULL;
 
-  meta_input_settings_find_monitor (settings, info->settings, device,
-                                    NULL, &logical_monitor);
+  logical_monitor =
+    meta_input_mapper_get_device_logical_monitor (priv->input_mapper, device);
+
+  if (!logical_monitor)
+    {
+      meta_input_settings_find_monitor (settings, info->settings, device,
+                                        NULL, &logical_monitor);
+    }
+
   return logical_monitor;
 }
 
-- 
2.24.1