[mutter/wip/xinput2r: 22/68] core: Add device map object



commit ffc101278d147304a83a410fe9de1e5c73e95155
Author: Carlos Garnacho <carlosg gnome org>
Date:   Sat Jun 11 22:14:17 2011 +0200

    core: Add device map object
    
    It will contain the input devices available

 src/Makefile.am            |    4 +
 src/core/device-map-core.c |  134 ++++++++++++++++++++
 src/core/device-map-core.h |   56 ++++++++
 src/core/device-map.c      |  302 ++++++++++++++++++++++++++++++++++++++++++++
 src/core/device-map.h      |  119 +++++++++++++++++
 src/core/display-private.h |    4 +
 src/core/display.c         |    2 +
 7 files changed, 621 insertions(+), 0 deletions(-)
---
diff --git a/src/Makefile.am b/src/Makefile.am
index 7049848..a1f321e 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -81,6 +81,10 @@ libmutter_la_SOURCES =				\
 	core/device-keyboard.h			\
 	core/device-pointer.c			\
 	core/device-pointer.h			\
+	core/device-map.c			\
+	core/device-map.h			\
+	core/device-map-core.c			\
+	core/device-map-core.h			\
 	core/devices-core.c			\
 	core/devices-core.h			\
 	core/display.c				\
diff --git a/src/core/device-map-core.c b/src/core/device-map-core.c
new file mode 100644
index 0000000..ea34f28
--- /dev/null
+++ b/src/core/device-map-core.c
@@ -0,0 +1,134 @@
+/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
+
+/* Input device map, core protocol implementation */
+
+/*
+ * Copyright (C) 2011 Carlos Garnacho
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program 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
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ */
+
+#include "config.h"
+#include "device-map-core.h"
+#include "devices-core.h"
+
+G_DEFINE_TYPE (MetaDeviceMapCore, meta_device_map_core, META_TYPE_DEVICE_MAP)
+
+static gboolean
+meta_device_map_core_grab_key (MetaDeviceMap *device_map,
+                               Window         xwindow,
+                               guint          keycode,
+                               guint          modifiers,
+                               gboolean       sync)
+{
+  MetaDisplay *display;
+  gint retval;
+
+  display = meta_device_map_get_display (device_map);
+  retval = XGrabKey (display->xdisplay, keycode, modifiers,
+                     xwindow, True,
+                     GrabModeAsync, /* Never care about the other device */
+                     (sync) ? GrabModeSync : GrabModeAsync);
+
+  return (retval == Success);
+}
+
+static void
+meta_device_map_core_ungrab_key (MetaDeviceMap *device_map,
+                                 Window         xwindow,
+                                 guint          keycode,
+                                 guint          modifiers)
+{
+  MetaDisplay *display;
+
+  display = meta_device_map_get_display (device_map);
+  XUngrabKey (display->xdisplay, keycode, modifiers, xwindow);
+}
+
+static gboolean
+meta_device_map_core_grab_button (MetaDeviceMap *device_map,
+                                  Window         xwindow,
+                                  guint          n_button,
+                                  guint          modifiers,
+                                  guint          evmask,
+                                  gboolean       sync)
+{
+  MetaDisplay *display;
+  gint retval;
+
+  display = meta_device_map_get_display (device_map);
+  retval = XGrabButton (display->xdisplay, n_button,
+                        modifiers, xwindow, False,
+                        evmask,
+                        (sync) ? GrabModeSync : GrabModeAsync,
+                        GrabModeAsync, /* Never care about the other device */
+                        None, None);
+
+  return (retval == Success);
+}
+
+static void
+meta_device_map_core_ungrab_button (MetaDeviceMap *device_map,
+                                    Window         xwindow,
+                                    guint          n_button,
+                                    guint          modifiers)
+{
+  MetaDisplay *display;
+
+  display = meta_device_map_get_display (device_map);
+  XUngrabButton (display->xdisplay, n_button, modifiers, xwindow);
+}
+
+static void
+meta_device_map_core_constructed (GObject *object)
+{
+  MetaDeviceMap *device_map = META_DEVICE_MAP (object);
+  MetaDevice *pointer, *keyboard;
+  MetaDisplay *display;
+
+  display = meta_device_map_get_display (device_map);
+
+  /* Insert core devices */
+  pointer = meta_device_pointer_core_new (display);
+  meta_device_map_add_device (device_map, pointer);
+
+  keyboard = meta_device_keyboard_core_new (display);
+  meta_device_map_add_device (device_map, keyboard);
+
+  meta_device_pair_devices (pointer, keyboard);
+
+  g_object_unref (pointer);
+  g_object_unref (keyboard);
+}
+
+static void
+meta_device_map_core_class_init (MetaDeviceMapCoreClass *klass)
+{
+  MetaDeviceMapClass *device_map_class = META_DEVICE_MAP_CLASS (klass);
+  GObjectClass *object_class = G_OBJECT_CLASS (klass);
+
+  object_class->constructed = meta_device_map_core_constructed;
+
+  device_map_class->grab_key = meta_device_map_core_grab_key;
+  device_map_class->ungrab_key = meta_device_map_core_ungrab_key;
+  device_map_class->grab_button = meta_device_map_core_grab_button;
+  device_map_class->ungrab_button = meta_device_map_core_ungrab_button;
+}
+
+static void
+meta_device_map_core_init (MetaDeviceMapCore *device_map)
+{
+}
diff --git a/src/core/device-map-core.h b/src/core/device-map-core.h
new file mode 100644
index 0000000..d9773de
--- /dev/null
+++ b/src/core/device-map-core.h
@@ -0,0 +1,56 @@
+/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
+
+/**
+ * \file device-map-core.h  device map for core devices
+ *
+ * Input devices.
+ * This file contains the core protocol implementation of the device map
+ */
+
+/*
+ * Copyright (C) 2011 Carlos Garnacho
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program 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
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ */
+
+#ifndef META_DEVICE_MAP_CORE_H
+#define META_DEVICE_MAP_CORE_H
+
+typedef struct _MetaDeviceMapCore MetaDeviceMapCore;
+typedef struct _MetaDeviceMapCoreClass MetaDeviceMapCoreClass;
+
+#include "device-map.h"
+
+#define META_TYPE_DEVICE_MAP_CORE            (meta_device_map_core_get_type ())
+#define META_DEVICE_MAP_CORE(obj)            (G_TYPE_CHECK_INSTANCE_CAST ((obj), META_TYPE_DEVICE_MAP_CORE, MetaDeviceMapCore))
+#define META_DEVICE_MAP_CORE_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass),  META_TYPE_DEVICE_MAP_CORE, MetaDeviceMapCoreClass))
+#define META_IS_DEVICE_MAP_CORE(obj)         (G_TYPE_CHECK_INSTANCE_TYPE ((obj), META_TYPE_DEVICE_MAP_CORE))
+#define META_IS_DEVICE_MAP_CORE_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass),  META_TYPE_DEVICE_MAP_CORE))
+#define META_DEVICE_MAP_CORE_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj),  META_TYPE_DEVICE_MAP_CORE, MetaDeviceMapCoreClass))
+
+struct _MetaDeviceMapCore
+{
+  MetaDeviceMap parent_instance;
+};
+
+struct _MetaDeviceMapCoreClass
+{
+  MetaDeviceMapClass parent_class;
+};
+
+GType           meta_device_map_core_get_type (void) G_GNUC_CONST;
+
+#endif /* META_DEVICE_MAP_CORE_H */
diff --git a/src/core/device-map.c b/src/core/device-map.c
new file mode 100644
index 0000000..1f28ed4
--- /dev/null
+++ b/src/core/device-map.c
@@ -0,0 +1,302 @@
+/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
+
+/* Input device map */
+
+/*
+ * Copyright (C) 2011 Carlos Garnacho
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program 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
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ */
+
+#include "config.h"
+#include "device-map.h"
+#include "device-map-core.h"
+
+G_DEFINE_TYPE (MetaDeviceMap, meta_device_map, G_TYPE_OBJECT)
+
+typedef struct MetaDeviceMapPrivate MetaDeviceMapPrivate;
+
+struct MetaDeviceMapPrivate
+{
+  MetaDisplay *display;
+  GHashTable *devices;
+};
+
+enum {
+  PROP_0,
+  PROP_DISPLAY
+};
+
+enum {
+  DEVICE_ADDED,
+  DEVICE_REMOVED,
+  LAST_SIGNAL
+};
+
+static guint signals[LAST_SIGNAL] = { 0 };
+
+static void
+meta_device_map_get_property (GObject    *object,
+                              guint       param_id,
+                              GValue     *value,
+                              GParamSpec *pspec)
+{
+  MetaDeviceMapPrivate *priv;
+
+  priv = META_DEVICE_MAP (object)->priv;
+
+  switch (param_id)
+    {
+    case PROP_DISPLAY:
+      g_value_set_object (value, priv->display);
+      break;
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
+      break;
+    }
+}
+
+static void
+meta_device_map_set_property (GObject      *object,
+                              guint         param_id,
+                              const GValue *value,
+                              GParamSpec   *pspec)
+{
+  MetaDeviceMapPrivate *priv;
+
+  priv = META_DEVICE_MAP (object)->priv;
+
+  switch (param_id)
+    {
+    case PROP_DISPLAY:
+      priv->display = g_value_get_object (value);
+      break;
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
+      break;
+    }
+}
+
+static void
+meta_device_map_finalize (GObject *object)
+{
+  MetaDeviceMapPrivate *priv;
+  GHashTableIter iter;
+  MetaDevice *device;
+
+  priv = META_DEVICE_MAP (object)->priv;
+  g_hash_table_iter_init (&iter, priv->devices);
+
+  while (g_hash_table_iter_next (&iter, NULL, (gpointer *) &device))
+    {
+      /* Detach the device */
+      g_hash_table_iter_steal (&iter);
+
+      g_signal_emit (object, signals[DEVICE_REMOVED], 0, device);
+      g_object_unref (device);
+    }
+
+  g_hash_table_destroy (priv->devices);
+  G_OBJECT_CLASS (meta_device_map_parent_class)->finalize (object);
+}
+
+static void
+meta_device_map_class_init (MetaDeviceMapClass *klass)
+{
+  GObjectClass *object_class = G_OBJECT_CLASS (klass);
+
+  object_class->get_property = meta_device_map_get_property;
+  object_class->set_property = meta_device_map_set_property;
+  object_class->finalize = meta_device_map_finalize;
+
+  g_object_class_install_property (object_class,
+                                   PROP_DISPLAY,
+                                   g_param_spec_object ("display",
+                                                        "Display",
+                                                        "Display",
+                                                        META_TYPE_DISPLAY,
+                                                        G_PARAM_READWRITE |
+                                                        G_PARAM_CONSTRUCT_ONLY));
+  signals[DEVICE_ADDED] =
+    g_signal_new ("device-added",
+                  G_TYPE_FROM_CLASS (klass),
+                  G_SIGNAL_RUN_LAST,
+                  0,
+                  NULL, NULL,
+                  g_cclosure_marshal_VOID__OBJECT,
+                  G_TYPE_NONE, 1, META_TYPE_DEVICE);
+  signals[DEVICE_REMOVED] =
+    g_signal_new ("device-removed",
+                  G_TYPE_FROM_CLASS (klass),
+                  G_SIGNAL_RUN_LAST,
+                  0,
+                  NULL, NULL,
+                  g_cclosure_marshal_VOID__OBJECT,
+                  G_TYPE_NONE, 1, META_TYPE_DEVICE);
+
+  g_type_class_add_private (klass, sizeof (MetaDeviceMapPrivate));
+}
+
+static void
+meta_device_map_init (MetaDeviceMap *device_map)
+{
+  MetaDeviceMapPrivate *priv;
+
+  priv = device_map->priv = G_TYPE_INSTANCE_GET_PRIVATE (device_map,
+                                                         META_TYPE_DEVICE_MAP,
+                                                         MetaDeviceMapPrivate);
+  priv->devices = g_hash_table_new_full (NULL, NULL, NULL,
+                                         (GDestroyNotify) g_object_unref);
+}
+
+void
+meta_device_map_add_device (MetaDeviceMap *device_map,
+                            MetaDevice    *device)
+{
+  MetaDeviceMapPrivate *priv;
+
+  priv = device_map->priv;
+  g_hash_table_insert (priv->devices,
+                       GINT_TO_POINTER (meta_device_get_id (device)),
+                       g_object_ref (device));
+
+  g_signal_emit (device_map, signals[DEVICE_ADDED], 0, device);
+}
+
+void
+meta_device_map_remove_device (MetaDeviceMap *device_map,
+                               MetaDevice    *device)
+{
+  MetaDeviceMapPrivate *priv;
+
+  priv = device_map->priv;
+
+  if (g_hash_table_steal (priv->devices,
+                          GINT_TO_POINTER (meta_device_get_id (device))))
+    {
+      g_signal_emit (device_map, signals[DEVICE_REMOVED], 0, device);
+      g_object_unref (device);
+    }
+}
+
+MetaDeviceMap *
+meta_device_map_new (MetaDisplay *display,
+                     gboolean     force_core)
+{
+  return g_object_new (META_TYPE_DEVICE_MAP_CORE,
+                       "display", display,
+                       NULL);
+}
+
+MetaDevice *
+meta_device_map_lookup (MetaDeviceMap *device_map,
+                        gint           device_id)
+{
+  MetaDeviceMapPrivate *priv;
+
+  g_return_val_if_fail (META_IS_DEVICE_MAP (device_map), NULL);
+
+  priv = device_map->priv;
+  return g_hash_table_lookup (priv->devices,
+                              GINT_TO_POINTER (device_id));
+}
+
+MetaDisplay *
+meta_device_map_get_display (MetaDeviceMap *device_map)
+{
+  MetaDeviceMapPrivate *priv;
+
+  g_return_val_if_fail (META_IS_DEVICE_MAP (device_map), NULL);
+
+  priv = device_map->priv;
+  return priv->display;
+}
+
+gboolean
+meta_device_map_grab_key (MetaDeviceMap *device_map,
+                          Window         xwindow,
+                          guint          keycode,
+                          guint          modifiers,
+                          gboolean       sync)
+{
+  MetaDeviceMapClass *klass;
+
+  g_return_val_if_fail (META_IS_DEVICE_MAP (device_map), FALSE);
+  g_return_val_if_fail (xwindow != None, FALSE);
+
+  klass = META_DEVICE_MAP_GET_CLASS (device_map);
+
+  if (!klass->grab_key)
+    return FALSE;
+
+  return (klass->grab_key) (device_map, xwindow, keycode, modifiers, sync);
+}
+
+void
+meta_device_map_ungrab_key (MetaDeviceMap *device_map,
+                            Window         xwindow,
+                            guint          keycode,
+                            guint          modifiers)
+{
+  MetaDeviceMapClass *klass;
+
+  g_return_if_fail (META_IS_DEVICE_MAP (device_map));
+  g_return_if_fail (xwindow != None);
+
+  klass = META_DEVICE_MAP_GET_CLASS (device_map);
+
+  if (klass->ungrab_key)
+    (klass->ungrab_key) (device_map, xwindow, keycode, modifiers);
+}
+
+gboolean
+meta_device_map_grab_button (MetaDeviceMap *device_map,
+                             Window         xwindow,
+                             guint          n_button,
+                             guint          modifiers,
+                             guint          evmask,
+                             gboolean       sync)
+{
+  MetaDeviceMapClass *klass;
+
+  g_return_val_if_fail (META_IS_DEVICE_MAP (device_map), FALSE);
+  g_return_val_if_fail (xwindow != None, FALSE);
+
+  klass = META_DEVICE_MAP_GET_CLASS (device_map);
+
+  if (!klass->grab_button)
+    return FALSE;
+
+  return (klass->grab_button) (device_map, xwindow, n_button,
+                               modifiers, evmask, sync);
+}
+
+void
+meta_device_map_ungrab_button (MetaDeviceMap *device_map,
+                               Window         xwindow,
+                               guint          n_button,
+                               guint          modifiers)
+{
+  MetaDeviceMapClass *klass;
+
+  g_return_if_fail (META_IS_DEVICE_MAP (device_map));
+  g_return_if_fail (xwindow != None);
+
+  klass = META_DEVICE_MAP_GET_CLASS (device_map);
+
+  if (klass->ungrab_button)
+    (klass->ungrab_button) (device_map, xwindow, n_button, modifiers);
+}
diff --git a/src/core/device-map.h b/src/core/device-map.h
new file mode 100644
index 0000000..b0e31f9
--- /dev/null
+++ b/src/core/device-map.h
@@ -0,0 +1,119 @@
+/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
+
+/**
+ * \file device-map.h  object containing input devices
+ *
+ * Input devices.
+ * This file contains the device map, used to find out the device behind
+ * XInput2/core events.
+ */
+
+/*
+ * Copyright (C) 2011 Carlos Garnacho
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program 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
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ */
+
+#ifndef META_DEVICE_MAP_H
+#define META_DEVICE_MAP_H
+
+typedef struct _MetaDeviceMap MetaDeviceMap;
+typedef struct _MetaDeviceMapClass MetaDeviceMapClass;
+
+#include "display-private.h"
+#include "device.h"
+
+#define META_TYPE_DEVICE_MAP            (meta_device_map_get_type ())
+#define META_DEVICE_MAP(obj)            (G_TYPE_CHECK_INSTANCE_CAST ((obj), META_TYPE_DEVICE_MAP, MetaDeviceMap))
+#define META_DEVICE_MAP_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass),  META_TYPE_DEVICE_MAP, MetaDeviceMapClass))
+#define META_IS_DEVICE_MAP(obj)         (G_TYPE_CHECK_INSTANCE_TYPE ((obj), META_TYPE_DEVICE_MAP))
+#define META_IS_DEVICE_MAP_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass),  META_TYPE_DEVICE_MAP))
+#define META_DEVICE_MAP_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj),  META_TYPE_DEVICE_MAP, MetaDeviceMapClass))
+
+struct _MetaDeviceMap
+{
+  GObject parent_instance;
+  gpointer priv;
+};
+
+struct _MetaDeviceMapClass
+{
+  GObjectClass parent_instance;
+
+  void (* device_added)   (MetaDeviceMap *device_map,
+                           MetaDevice    *device);
+  void (* device_removed) (MetaDeviceMap *device_map,
+                           MetaDevice    *device);
+
+  gboolean (* grab_key)       (MetaDeviceMap *device_map,
+                               Window         xwindow,
+                               guint          keycode,
+                               guint          modifiers,
+                               gboolean       sync);
+  void     (* ungrab_key)     (MetaDeviceMap *device_map,
+                               Window         xwindow,
+                               guint          keycode,
+                               guint          modifiers);
+
+  gboolean (* grab_button)    (MetaDeviceMap *device_map,
+                               Window         xwindow,
+                               guint          n_button,
+                               guint          modifiers,
+                               guint          evmask,
+                               gboolean       sync);
+  void     (* ungrab_button)  (MetaDeviceMap *pointer,
+                               Window         xwindow,
+                               guint          n_button,
+                               guint          modifiers);
+};
+
+GType           meta_device_map_get_type (void) G_GNUC_CONST;
+
+MetaDeviceMap * meta_device_map_new    (MetaDisplay   *display,
+                                        gboolean       force_core);
+
+void            meta_device_map_add_device    (MetaDeviceMap *device_map,
+                                               MetaDevice    *device);
+void            meta_device_map_remove_device (MetaDeviceMap *device_map,
+                                               MetaDevice    *device);
+
+MetaDevice *    meta_device_map_lookup (MetaDeviceMap *device_map,
+                                        gint           device_id);
+
+MetaDisplay *   meta_device_map_get_display (MetaDeviceMap *device_map);
+
+gboolean meta_device_map_grab_key        (MetaDeviceMap      *device_map,
+                                          Window              xwindow,
+                                          guint               keycode,
+                                          guint               modifiers,
+                                          gboolean            sync);
+void     meta_device_map_ungrab_key      (MetaDeviceMap      *device_map,
+                                          Window              xwindow,
+                                          guint               keycode,
+                                          guint               modifiers);
+gboolean meta_device_map_grab_button     (MetaDeviceMap      *device_map,
+                                          Window              xwindow,
+                                          guint               n_button,
+                                          guint               modifiers,
+                                          guint               evmask,
+                                          gboolean            sync);
+void     meta_device_map_ungrab_button   (MetaDeviceMap      *device_map,
+                                          Window              xwindow,
+                                          guint               n_button,
+                                          guint               modifiers);
+
+
+#endif /* META_DEVICE_MAP_H */
diff --git a/src/core/display-private.h b/src/core/display-private.h
index 078afcb..67a8c43 100644
--- a/src/core/display-private.h
+++ b/src/core/display-private.h
@@ -38,6 +38,7 @@
 #include <meta/boxes.h>
 #include <meta/display.h>
 #include "keybindings-private.h"
+#include "device-map.h"
 #include <meta/prefs.h>
 
 #ifdef HAVE_STARTUP_NOTIFICATION
@@ -272,6 +273,9 @@ struct _MetaDisplay
   /* Managed by compositor.c */
   MetaCompositor *compositor;
 
+  /* Managed by device-map.c */
+  MetaDeviceMap *device_map;
+
   int render_event_base;
   int render_error_base;
 
diff --git a/src/core/display.c b/src/core/display.c
index 5a3caf7..afcdffc 100644
--- a/src/core/display.c
+++ b/src/core/display.c
@@ -49,6 +49,7 @@
 #include "xprops.h"
 #include "workspace-private.h"
 #include "bell.h"
+#include "device.h"
 #include "input-events.h"
 #include <meta/compositor.h>
 #include <meta/compositor-mutter.h>
@@ -542,6 +543,7 @@ meta_display_open (void)
   the_display->static_gravity_works = g_getenv ("MUTTER_USE_STATIC_GRAVITY") != NULL;
   
   meta_bell_init (the_display);
+  the_display->device_map = meta_device_map_new (the_display, TRUE);
 
   meta_display_init_keys (the_display);
 



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