[mutter] cursor-tracker: Add API to get whether the pointer is visible

[Carlos Garnacho <carlosg src gnome org>]

commit faa7b2d4e508fe36a80b22d13f668ee99fa810e8
Author: Jonas Dreßler <verdre v0yd nl>
Date:   Wed Apr 10 21:28:05 2019 +0200

    cursor-tracker: Add API to get whether the pointer is visible
    
    Allow checking whether the pointer is visible without accessing the
    trackers internal is_showing property. While we don't need this just yet
    for reading the visibility inside meta-wayland-pointer, it's useful when
    implementing the logic to remove Clutter's focus when the cursor goes
    hidden later.
    
    https://gitlab.gnome.org/GNOME/mutter/merge_requests/448

 src/backends/meta-cursor-tracker.c | 6 ++++++
 src/meta/meta-cursor-tracker.h     | 3 +++
 2 files changed, 9 insertions(+)
---
diff --git a/src/backends/meta-cursor-tracker.c b/src/backends/meta-cursor-tracker.c
index 6b7849d55..88607bf4d 100644
--- a/src/backends/meta-cursor-tracker.c
+++ b/src/backends/meta-cursor-tracker.c
@@ -418,6 +418,12 @@ meta_cursor_tracker_get_pointer (MetaCursorTracker   *tracker,
     get_pointer_position_gdk (x, y, (int*)mods);
 }
 
+gboolean
+meta_cursor_tracker_get_pointer_visible (MetaCursorTracker *tracker)
+{
+  return tracker->is_showing;
+}
+
 void
 meta_cursor_tracker_set_pointer_visible (MetaCursorTracker *tracker,
                                          gboolean           visible)
diff --git a/src/meta/meta-cursor-tracker.h b/src/meta/meta-cursor-tracker.h
index 29b1aab5a..2f51115e4 100644
--- a/src/meta/meta-cursor-tracker.h
+++ b/src/meta/meta-cursor-tracker.h
@@ -55,6 +55,9 @@ void           meta_cursor_tracker_get_pointer (MetaCursorTracker   *tracker,
                                                 int                 *y,
                                                 ClutterModifierType *mods);
 
+META_EXPORT
+gboolean       meta_cursor_tracker_get_pointer_visible (MetaCursorTracker *tracker);
+
 META_EXPORT
 void           meta_cursor_tracker_set_pointer_visible (MetaCursorTracker *tracker,
                                                         gboolean           visible);