From 3b181c6754d675656c2624103de584d2a28defb0 Mon Sep 17 00:00:00 2001
From: Hans de Goede <hdegoede@redhat.com>
Date: Thu, 15 Oct 2020 15:23:38 +0200
Subject: [PATCH] clutter: Add ClutterSeat::clutter_seat_has_touchscreen()
 helper function

Add a helper function to determine if a seat has a (physical)
touchscreen associated with it.

Currently src/backends/meta-backend.c has a private version of this
(check_has_physical_touchscreen) and further patches in this patch-set
need the same functionality. So add a generic helper for this to
avoid code duplication.

https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1506
---
 clutter/clutter/clutter-seat.c | 27 +++++++++++++++++++++++++++
 clutter/clutter/clutter-seat.h |  3 +++
 2 files changed, 30 insertions(+)

diff --git a/clutter/clutter/clutter-seat.c b/clutter/clutter/clutter-seat.c
index 13a862bf4..96bb0e930 100644
--- a/clutter/clutter/clutter-seat.c
+++ b/clutter/clutter/clutter-seat.c
@@ -749,3 +749,30 @@ clutter_seat_get_touch_mode (ClutterSeat *seat)
 
   return touch_mode;
 }
+
+/**
+ * clutter_seat_has_touchscreen: (skip)
+ **/
+gboolean
+clutter_seat_has_touchscreen (ClutterSeat *seat)
+{
+  gboolean has_touchscreen;
+  const GList *devices, *l;
+
+  g_return_val_if_fail (CLUTTER_IS_SEAT (seat), FALSE);
+
+  devices = clutter_seat_peek_devices (seat);
+  for (l = devices; l; l = l->next)
+    {
+      ClutterInputDevice *device = l->data;
+
+      if (clutter_input_device_get_device_mode (device) != CLUTTER_INPUT_MODE_LOGICAL &&
+          clutter_input_device_get_device_type (device) == CLUTTER_TOUCHSCREEN_DEVICE)
+        {
+          has_touchscreen = TRUE;
+          break;
+        }
+    }
+
+  return has_touchscreen;
+}
diff --git a/clutter/clutter/clutter-seat.h b/clutter/clutter/clutter-seat.h
index aa88d7300..33497a43f 100644
--- a/clutter/clutter/clutter-seat.h
+++ b/clutter/clutter/clutter-seat.h
@@ -194,4 +194,7 @@ void clutter_seat_warp_pointer (ClutterSeat *seat,
 CLUTTER_EXPORT
 gboolean clutter_seat_get_touch_mode (ClutterSeat *seat);
 
+CLUTTER_EXPORT
+gboolean clutter_seat_has_touchscreen (ClutterSeat *seat);
+
 #endif /* CLUTTER_SEAT_H */