wayland: Implement support for 'cursor-visible' stage property

This will allow clutter Wayland clients to either not draw any pointer
cursor or draw its own.

Signed-off-by: Jonas Ådahl <jadahl@gmail.com>

https://bugzilla.gnome.org/show_bug.cgi?id=709590

clutter/wayland/clutter-backend-wayland-priv.h

@@ -62,6 +62,8 @@ struct _ClutterBackendWayland
   GTimer *event_timer;
 };
 
+void _clutter_backend_wayland_ensure_cursor (ClutterBackendWayland *backend_wayland);
+
 G_END_DECLS
 
 #endif /* __CLUTTER_BACKEND_WAYLAND_PRIV_H__ */

clutter/wayland/clutter-backend-wayland.c

@@ -63,8 +63,6 @@ G_DEFINE_TYPE (ClutterBackendWayland, clutter_backend_wayland, CLUTTER_TYPE_BACK
 static struct wl_display *_foreign_display = NULL;
 static gboolean _no_event_dispatch = FALSE;
 
-static void clutter_backend_wayland_load_cursor (ClutterBackendWayland *backend_wayland);
-
 static void
 clutter_backend_wayland_dispose (GObject *gobject)
 {
@@ -224,9 +222,6 @@ clutter_backend_wayland_post_parse (ClutterBackend  *backend,
            backend_wayland->wayland_shell))
     wl_display_roundtrip (backend_wayland->wayland_display);
 
-  /* We need the shm object before we can create the cursor */
-  clutter_backend_wayland_load_cursor (backend_wayland);
-
   return TRUE;
 }
 
@@ -296,8 +291,8 @@ clutter_backend_wayland_class_init (ClutterBackendWaylandClass *klass)
   backend_class->get_display = clutter_backend_wayland_get_display;
 }
 
-static void
+void
-clutter_backend_wayland_load_cursor (ClutterBackendWayland *backend_wayland)
+_clutter_backend_wayland_ensure_cursor (ClutterBackendWayland *backend_wayland)
 {
   struct wl_cursor *cursor;
 

clutter/wayland/clutter-input-device-wayland.c

@@ -44,6 +44,7 @@
 #include "clutter-backend-wayland.h"
 #include "clutter-backend-wayland-priv.h"
 #include "clutter-stage-private.h"
+#include "clutter-stage-wayland.h"
 #include "clutter-wayland.h"
 
 #include "cogl/clutter-stage-cogl.h"
@@ -351,15 +352,17 @@ clutter_wayland_handle_pointer_enter (void *data,
                                       wl_fixed_t x, wl_fixed_t y)
 {
   ClutterInputDeviceWayland *device = data;
+  ClutterStageWayland       *stage_wayland;
   ClutterStageCogl          *stage_cogl;
   ClutterEvent              *event;
   ClutterBackend            *backend;
   ClutterBackendWayland     *backend_wayland;
 
-  if (!CLUTTER_IS_STAGE_COGL (wl_surface_get_user_data (surface)))
+  stage_wayland = wl_surface_get_user_data (surface);
-    return;
 
-  stage_cogl = wl_surface_get_user_data (surface);
+  if (!CLUTTER_IS_STAGE_COGL (stage_wayland))
+    return;
+  stage_cogl = CLUTTER_STAGE_COGL (stage_wayland);
 
   device->pointer_focus = stage_cogl;
   _clutter_input_device_set_stage (CLUTTER_INPUT_DEVICE (device),
@@ -378,26 +381,35 @@ clutter_wayland_handle_pointer_enter (void *data,
 
   _clutter_event_push (event, FALSE);
 
-  /* Set the cursor to the cursor loaded at backend initialisation */
+  if (stage_wayland->cursor_visible)
-  backend = clutter_get_default_backend ();
+    {
-  backend_wayland = CLUTTER_BACKEND_WAYLAND (backend);
+      /* Set the cursor to the cursor loaded at backend initialisation */
+      backend = clutter_get_default_backend ();
+      backend_wayland = CLUTTER_BACKEND_WAYLAND (backend);
 
-  wl_pointer_set_cursor (pointer,
+      _clutter_backend_wayland_ensure_cursor (backend_wayland);
-                         serial,
-                         backend_wayland->cursor_surface,
-                         backend_wayland->cursor_x,
-                         backend_wayland->cursor_y);
-  wl_surface_attach (backend_wayland->cursor_surface,
-                     backend_wayland->cursor_buffer,
-                     0,
-                     0);
-  wl_surface_damage (backend_wayland->cursor_surface,
-                     0,
-                     0,
-                     32, /* XXX: FFS */
-                     32);
 
-  wl_surface_commit (backend_wayland->cursor_surface);
+      wl_pointer_set_cursor (pointer,
+                             serial,
+                             backend_wayland->cursor_surface,
+                             backend_wayland->cursor_x,
+                             backend_wayland->cursor_y);
+      wl_surface_attach (backend_wayland->cursor_surface,
+                         backend_wayland->cursor_buffer,
+                         0,
+                         0);
+      wl_surface_damage (backend_wayland->cursor_surface,
+                         0,
+                         0,
+                         32, /* XXX: FFS */
+                         32);
+
+      wl_surface_commit (backend_wayland->cursor_surface);
+    }
+  else
+    {
+      wl_pointer_set_cursor (pointer, serial, NULL, 0, 0);
+    }
 }
 
 static void

clutter/wayland/clutter-stage-wayland.c

@@ -153,6 +153,15 @@ clutter_stage_wayland_show (ClutterStageWindow *stage_window,
   clutter_actor_queue_redraw (CLUTTER_ACTOR (stage_cogl->wrapper));
 }
 
+static void
+clutter_stage_wayland_set_cursor_visible (ClutterStageWindow *stage_window,
+                                          gboolean            cursor_visible)
+{
+  ClutterStageWayland *stage_wayland = CLUTTER_STAGE_WAYLAND (stage_window);
+
+  stage_wayland->cursor_visible = cursor_visible;
+}
+
 static void
 clutter_stage_wayland_set_fullscreen (ClutterStageWindow *stage_window,
                                       gboolean            fullscreen)
@@ -223,6 +232,7 @@ clutter_stage_wayland_resize (ClutterStageWindow *stage_window,
 static void
 clutter_stage_wayland_init (ClutterStageWayland *stage_wayland)
 {
+  stage_wayland->cursor_visible = TRUE;
 }
 
 static void
@@ -233,6 +243,7 @@ clutter_stage_window_iface_init (ClutterStageWindowIface *iface)
   iface->realize = clutter_stage_wayland_realize;
   iface->show = clutter_stage_wayland_show;
   iface->set_fullscreen = clutter_stage_wayland_set_fullscreen;
+  iface->set_cursor_visible = clutter_stage_wayland_set_cursor_visible;
   iface->resize = clutter_stage_wayland_resize;
 }
 

clutter/wayland/clutter-stage-wayland.h

@@ -55,6 +55,7 @@ struct _ClutterStageWayland
   gboolean fullscreen;
   gboolean foreign_wl_surface;
   gboolean shown;
+  gboolean cursor_visible;
 };
 
 struct _ClutterStageWaylandClass