wayland: Add accessor API to permit access to underlying Wayland structures

* clutter_wayland_input_device_get_wl_input_device for the input device
* clutter_wayland_stage_get_wl_surface for the Wayland surface
* clutter_wayland_stage_get_wl_shell_surface for the shell surface

clutter/Makefile.am

@@ -603,6 +603,10 @@ backend_source_c += \
        $(srcdir)/wayland/clutter-input-device-wayland.c        \
        $(srcdir)/wayland/clutter-device-manager-wayland.c
 
+
+clutterwayland_includedir = $(clutter_includedir)/wayland
+clutterwayland_include_HEADERS = $(srcdir)/wayland/clutter-wayland.h
+
 clutter-wayland-$(CLUTTER_API_VERSION).pc: clutter-$(CLUTTER_API_VERSION).pc
 	$(QUIET_GEN)cp -f $< $(@F)
 

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

@@ -256,3 +256,32 @@ static void
 clutter_input_device_wayland_init (ClutterInputDeviceWayland *self)
 {
 }
+
+/**
+ * clutter_wayland_input_device_get_wl_input_device: (skip)
+ *
+ * @device: a #ClutterInputDevice
+ *
+ * Access the underlying data structure representing the Wayland device that is
+ * backing this #ClutterInputDevice.
+ *
+ * Note: this function can only be called when running on the Wayland platform.
+ * Calling this function at any other time will return %NULL.
+ *
+ * Returns: (transfer none): the Wayland input device associated with the
+ * @device
+ *
+ * Since: 1.10
+ */
+struct wl_input_device *
+clutter_wayland_input_device_get_wl_input_device (ClutterInputDevice *device)
+{
+  ClutterInputDeviceWayland *wayland_device;
+
+  if (!CLUTTER_INPUT_DEVICE_WAYLAND (device))
+    return NULL;
+
+  wayland_device = CLUTTER_INPUT_DEVICE_WAYLAND (device);
+
+  return wayland_device->input_device;
+}

clutter/wayland/clutter-stage-wayland.c

@@ -183,3 +183,61 @@ static void
 clutter_stage_wayland_class_init (ClutterStageWaylandClass *klass)
 {
 }
+
+/**
+ * clutter_wayland_stage_get_wl_shell_surface: (skip)
+ *
+ * @stage: a #ClutterStage
+ *
+ * Access the underlying data structure representing the shell surface that is
+ * backing the #ClutterStage
+ *
+ * Note: this function can only be called when running on the Wayland
+ * platform. Calling this function at any other time will return %NULL.
+ *
+ * Returns: (transfer non): the Wayland shell surface associated with
+ * @stage
+ *
+ * Since: 1.10
+ */
+struct wl_shell_surface *
+clutter_wayland_stage_get_wl_shell_surface (ClutterStage *stage)
+{
+  ClutterStageWindow *stage_window = _clutter_stage_get_window (stage);
+  ClutterStageWayland *stage_wayland;
+
+  if (!CLUTTER_IS_STAGE_WAYLAND (stage_window))
+    return NULL;
+
+  stage_wayland = CLUTTER_STAGE_WAYLAND (stage_window);
+
+  return stage_wayland->wayland_shell_surface;
+}
+
+/**
+ * clutter_wayland_stage_get_wl_surface: (skip)
+ *
+ * @stage: a #ClutterStage
+ *
+ * Access the underlying data structure representing the surface that is
+ * backing the #ClutterStage
+ *
+ * Note: this function can only be called when running on the Wayland
+ * platform. Calling this function at any other time will return %NULL.
+ *
+ * Returns: (transfer none): the Wayland surface associated with @stage
+ */
+struct wl_surface *
+clutter_wayland_stage_get_wl_surface (ClutterStage *stage)
+{
+  ClutterStageWindow *stage_window = _clutter_stage_get_window (stage);
+  ClutterStageWayland *stage_wayland;
+
+  if (!CLUTTER_IS_STAGE_WAYLAND (stage_window))
+    return NULL;
+
+  stage_wayland = CLUTTER_STAGE_WAYLAND (stage_window);
+
+  return stage_wayland->wayland_surface;
+
+}

clutter/wayland/clutter-wayland.h

@@ -0,0 +1,48 @@
+/*
+ * Clutter.
+ *
+ * An OpenGL based 'interactive canvas' library.
+ *
+ * Copyright (C) 2012 Intel Corporation
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library. If not, see <http://www.gnu.org/licenses/>.
+ *
+ *
+ */
+
+/**
+ * SECTION:clutter-wayland
+ * @short_description: Wayland specific API
+ *
+ * The Wayland backend for Clutter provides some specific API, allowing
+ * integration with the Wayland client API for acessing the underlying data
+ * structures
+ *
+ * The Clutter Wayland API is available since Clutter 1.10
+ */
+
+#ifndef __CLUTTER_WAYLAND_H__
+#define __CLUTTER_WAYLAND_H__
+
+#include <glib.h>
+#include <wayland-client.h>
+#include <clutter/clutter.h>
+G_BEGIN_DECLS
+
+struct wl_input_device *clutter_wayland_input_device_get_wl_input_device (ClutterInputDevice *device);
+struct wl_shell_surface *clutter_wayland_stage_get_wl_shell_surface (ClutterStage *stage);
+struct wl_surface *clutter_wayland_stage_get_wl_surface (ClutterStage *stage);
+G_END_DECLS
+
+#endif /* __CLUTTER_WAYLAND_H__ */