[mutter/wayland] MetaCursorTracker: add methods for setting the cursor visibility

[Giovanni Campagna <gcampagna src gnome org>]

commit 5b3340e5856b9b90d1c8ad938053a18e0e891c01
Author: Giovanni Campagna <gcampagn redhat com>
Date:   Wed Sep 4 16:56:00 2013 +0200

    MetaCursorTracker: add methods for setting the cursor visibility
    
    clutter_stage_show_cursor()/hide_cursor() only works in the X11
    backend (where someone else is in charge of showing the cursor),
    and even then, it has confusing effects when running nested wayland,
    so an abstraction layer is needed.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=707474

 src/core/meta-cursor-tracker.c |   28 +++++++++++++++++++++++++++-
 src/meta/meta-cursor-tracker.h |    2 ++
 2 files changed, 29 insertions(+), 1 deletions(-)
---
diff --git a/src/core/meta-cursor-tracker.c b/src/core/meta-cursor-tracker.c
index 0ae1786..8c3815e 100644
--- a/src/core/meta-cursor-tracker.c
+++ b/src/core/meta-cursor-tracker.c
@@ -426,7 +426,7 @@ meta_cursor_tracker_paint (MetaCursorTracker *tracker)
 {
   g_assert (meta_is_wayland_compositor ());
 
-  if (tracker->sprite == NULL)
+  if (tracker->sprite == NULL || tracker->is_showing == FALSE)
     return;
 
   /* FIXME: try to use a DRM cursor when possible */
@@ -513,3 +513,29 @@ meta_cursor_tracker_get_pointer (MetaCursorTracker   *tracker,
   else
     get_pointer_position_gdk (x, y, (int*)mods);
 }
+
+void
+meta_cursor_tracker_set_pointer_visible (MetaCursorTracker *tracker,
+                                         gboolean           visible)
+{
+  if (visible == tracker->is_showing)
+    return;
+  tracker->is_showing = visible;
+
+  if (meta_is_wayland_compositor ())
+    {
+      MetaWaylandCompositor *compositor;
+
+      compositor = meta_wayland_compositor_get_default ();
+      meta_cursor_tracker_queue_redraw (tracker, compositor->stage);
+    }
+  else
+    {
+      if (visible)
+        XFixesShowCursor (tracker->screen->display->xdisplay,
+                          tracker->screen->xroot);
+      else
+        XFixesHideCursor (tracker->screen->display->xdisplay,
+                          tracker->screen->xroot);
+    }
+}
diff --git a/src/meta/meta-cursor-tracker.h b/src/meta/meta-cursor-tracker.h
index 8862e43..3920295 100644
--- a/src/meta/meta-cursor-tracker.h
+++ b/src/meta/meta-cursor-tracker.h
@@ -52,5 +52,7 @@ void           meta_cursor_tracker_get_pointer (MetaCursorTracker   *tracker,
                                                 int                 *x,
                                                 int                 *y,
                                                 ClutterModifierType *mods);
+void           meta_cursor_tracker_set_pointer_visible (MetaCursorTracker *tracker,
+                                                        gboolean           visible);
 
 #endif