[clutter] evdev: Allow to retrieve the input.h event code from ClutterEvents

[Carlos Garnacho <carlosg src gnome org>]

commit f1ad702309486ff4bd32b7f0456a132893f2c17a
Author: Carlos Garnacho <carlosg gnome org>
Date:   Tue Nov 17 17:42:44 2015 +0100

    evdev: Allow to retrieve the input.h event code from ClutterEvents
    
    This is now stored as platform data in the ClutterEvent, so can
    be retrieved with the clutter_evdev_event_get_event_code() call
    that's been added to the evdev backend.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=758238

 clutter/Makefile.am                          |    1 +
 clutter/evdev/clutter-device-manager-evdev.c |   10 +++
 clutter/evdev/clutter-evdev.h                |    3 +
 clutter/evdev/clutter-event-evdev.c          |  101 ++++++++++++++++++++++++++
 clutter/evdev/clutter-input-device-evdev.h   |    8 ++
 5 files changed, 123 insertions(+), 0 deletions(-)
---
diff --git a/clutter/Makefile.am b/clutter/Makefile.am
index a2c0465..c285f43 100644
--- a/clutter/Makefile.am
+++ b/clutter/Makefile.am
@@ -598,6 +598,7 @@ endif # SUPPORT_TSLIB
 evdev_c_priv = \
        evdev/clutter-device-manager-evdev.c    \
        evdev/clutter-input-device-evdev.c      \
+       evdev/clutter-event-evdev.c             \
        $(NULL)
 evdev_h_priv = \
        evdev/clutter-device-manager-evdev.h    \
diff --git a/clutter/evdev/clutter-device-manager-evdev.c b/clutter/evdev/clutter-device-manager-evdev.c
index 50df6f5..ccc923e 100644
--- a/clutter/evdev/clutter-device-manager-evdev.c
+++ b/clutter/evdev/clutter-device-manager-evdev.c
@@ -188,12 +188,22 @@ clutter_device_manager_evdev_copy_event_data (ClutterEventExtender *event_extend
                                               const ClutterEvent   *src,
                                               ClutterEvent         *dest)
 {
+  ClutterEventEvdev *event_evdev;
+
+  event_evdev = _clutter_event_get_platform_data (src);
+  if (event_evdev != NULL)
+    _clutter_event_set_platform_data (dest, _clutter_event_evdev_copy (event_evdev));
 }
 
 static void
 clutter_device_manager_evdev_free_event_data (ClutterEventExtender *event_extender,
                                               ClutterEvent         *event)
 {
+  ClutterEventEvdev *event_evdev;
+
+  event_evdev = _clutter_event_get_platform_data (event);
+  if (event_evdev != NULL)
+    _clutter_event_evdev_free (event_evdev);
 }
 
 static void
diff --git a/clutter/evdev/clutter-evdev.h b/clutter/evdev/clutter-evdev.h
index 27aa33c..1e79630 100644
--- a/clutter/evdev/clutter-evdev.h
+++ b/clutter/evdev/clutter-evdev.h
@@ -131,6 +131,9 @@ void clutter_evdev_warp_pointer (ClutterInputDevice   *pointer_device,
                                  int                   x,
                                  int                   y);
 
+CLUTTER_AVAILABLE_IN_1_26
+guint32 clutter_evdev_event_get_event_code (const ClutterEvent *event);
+
 G_END_DECLS
 
 #endif /* __CLUTTER_EVDEV_H__ */
diff --git a/clutter/evdev/clutter-event-evdev.c b/clutter/evdev/clutter-event-evdev.c
new file mode 100644
index 0000000..b2f115e
--- /dev/null
+++ b/clutter/evdev/clutter-event-evdev.c
@@ -0,0 +1,101 @@
+/* Clutter.
+ * An OpenGL based 'interactive canvas' library.
+ *
+ * Copyright (C) 2015 Red Hat
+ *
+ * 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/>.
+ *
+ * Authored by:
+ *      Carlos Garnacho <carlosg gnome org>
+ */
+
+#include "config.h"
+
+#include "clutter/clutter-device-manager-private.h"
+#include "clutter/clutter-event-private.h"
+#include "clutter-input-device-evdev.h"
+#include "clutter-evdev.h"
+
+typedef struct _ClutterEventEvdev ClutterEventEvdev;
+
+struct _ClutterEventEvdev
+{
+  guint32 evcode;
+};
+
+static ClutterEventEvdev *
+_clutter_event_evdev_new (void)
+{
+  return g_slice_new0 (ClutterEventEvdev);
+}
+
+ClutterEventEvdev *
+_clutter_event_evdev_copy (ClutterEventEvdev *event_evdev)
+{
+  if (event_evdev != NULL)
+    return g_slice_dup (ClutterEventEvdev, event_evdev);
+
+  return NULL;
+}
+
+void
+_clutter_event_evdev_free (ClutterEventEvdev *event_evdev)
+{
+  if (event_evdev != NULL)
+    g_slice_free (ClutterEventEvdev, event_evdev);
+}
+
+static ClutterEventEvdev *
+clutter_evdev_event_ensure_platform_data (ClutterEvent *event)
+{
+  ClutterEventEvdev *event_evdev = _clutter_event_get_platform_data (event);
+
+  if (!event_evdev)
+    {
+      event_evdev = _clutter_event_evdev_new ();
+      _clutter_event_set_platform_data (event, event_evdev);
+    }
+
+  return event_evdev;
+}
+
+void
+_clutter_evdev_event_set_event_code (ClutterEvent *event,
+                                     guint32       evcode)
+{
+  ClutterEventEvdev *event_evdev;
+
+  event_evdev = clutter_evdev_event_ensure_platform_data (event);
+  event_evdev->evcode = evcode;
+}
+
+/**
+ * clutter_evdev_event_get_event_code:
+ * @event: a #ClutterEvent
+ *
+ * Returns the event code of the original event. See linux/input.h for more
+ * information.
+ *
+ * Returns: The event code.
+ **/
+guint32
+clutter_evdev_event_get_event_code (const ClutterEvent *event)
+{
+  ClutterEventEvdev *event_evdev = _clutter_event_get_platform_data (event);
+
+  if (event_evdev)
+    return event_evdev->evcode;
+
+  return 0;
+}
diff --git a/clutter/evdev/clutter-input-device-evdev.h b/clutter/evdev/clutter-input-device-evdev.h
index 06f3d86..1302a2c 100644
--- a/clutter/evdev/clutter-input-device-evdev.h
+++ b/clutter/evdev/clutter-input-device-evdev.h
@@ -57,6 +57,7 @@ G_BEGIN_DECLS
 
 typedef struct _ClutterInputDeviceEvdev ClutterInputDeviceEvdev;
 typedef struct _ClutterSeatEvdev ClutterSeatEvdev;
+typedef struct _ClutterEventEvdev ClutterEventEvdev;
 
 struct _ClutterInputDeviceEvdev
 {
@@ -83,6 +84,13 @@ void                      _clutter_input_device_evdev_update_leds     (ClutterIn
 
 ClutterInputDeviceType    _clutter_input_device_evdev_determine_type  (struct libinput_device  
*libinput_device);
 
+
+ClutterEventEvdev *       _clutter_event_evdev_copy                   (ClutterEventEvdev *event_evdev);
+void                      _clutter_event_evdev_free                   (ClutterEventEvdev *event_evdev);
+
+void                      _clutter_evdev_event_set_event_code         (ClutterEvent      *event,
+                                                                       guint32            evcode);
+
 G_END_DECLS
 
 #endif /* __CLUTTER_INPUT_DEVICE_EVDEV_H__ */