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evdev: sync the keyboard state when releasing and reclaiming devices

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When we release a device, we lose all the events after that point,
so our state can become stale. Similarly, we need to sync the
state with the effectively pressed keys when we reclaim.
This ensures that modifier keys don't get stuck when switching
VTs using a keybinding.

https://bugzilla.gnome.org/show_bug.cgi?id=706494
This commit is contained in:
Giovanni Campagna 2013-09-06 15:59:21 +02:00
parent 59f1e531f9
commit 19536c8835
1 changed files with 69 additions and 9 deletions
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78
clutter/evdev/clutter-device-manager-evdev.c
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@ -188,12 +188,12 @@ remove_key (GArray *keys,
}
static void
notify_key (ClutterEventSource *source,
guint32 time_,
guint32 key,
guint32 state)
notify_key_device (ClutterInputDevice *input_device,
guint32 time_,
guint32 key,
guint32 state,
gboolean update_keys)
{
ClutterInputDevice *input_device = (ClutterInputDevice *) source->device;
ClutterDeviceManagerEvdev *manager_evdev;
ClutterStage *stage;
ClutterEvent *event = NULL;
@ -223,16 +223,29 @@ notify_key (ClutterEventSource *source,
{
xkb_state_update_key (manager_evdev->priv->xkb, event->key.hardware_keycode, state ? XKB_KEY_DOWN : XKB_KEY_UP);
if (state)
add_key (manager_evdev->priv->keys, event->key.hardware_keycode);
else
remove_key (manager_evdev->priv->keys, event->key.hardware_keycode);
if (update_keys)
{
if (state)
add_key (manager_evdev->priv->keys, event->key.hardware_keycode);
else
remove_key (manager_evdev->priv->keys, event->key.hardware_keycode);
}
}
queue_event (event);
}
}
static void
notify_key (ClutterEventSource *source,
guint32 time_,
guint32 key,
guint32 state)
{
ClutterInputDevice *input_device = (ClutterInputDevice *) source->device;
notify_key_device (input_device, time_, key, state, TRUE);
}
static void
notify_relative_motion (ClutterEventSource *source,
@ -1197,6 +1210,8 @@ clutter_evdev_release_devices (void)
ClutterDeviceManagerEvdev *evdev_manager;
ClutterDeviceManagerEvdevPrivate *priv;
GSList *l, *next;
uint32_t time_;
unsigned i;
if (!manager)
{
@ -1218,6 +1233,13 @@ clutter_evdev_release_devices (void)
return;
}
/* Fake release events for all currently pressed keys */
time_ = g_get_monotonic_time () / 1000;
for (i = 0; i < priv->keys->len; i++)
notify_key_device (priv->core_keyboard, time_,
g_array_index (priv->keys, uint32_t, i) - 8, 0, FALSE);
g_array_set_size (priv->keys, 0);
for (l = priv->devices; l; l = next)
{
ClutterInputDevice *device = l->data;
@ -1251,6 +1273,13 @@ clutter_evdev_reclaim_devices (void)
ClutterDeviceManager *manager = clutter_device_manager_get_default ();
ClutterDeviceManagerEvdev *evdev_manager;
ClutterDeviceManagerEvdevPrivate *priv;
#define LONG_BITS (sizeof(long) * 8)
#define NLONGS(x) (((x) + LONG_BITS - 1) / LONG_BITS)
unsigned long key_bits[NLONGS(KEY_CNT)];
unsigned long source_key_bits[NLONGS(KEY_CNT)];
GSList *iter;
int i, j, rc;
guint32 time_;
if (!manager)
{
@ -1273,6 +1302,37 @@ clutter_evdev_reclaim_devices (void)
priv->released = FALSE;
clutter_device_manager_evdev_probe_devices (evdev_manager);
memset (key_bits, 0, sizeof (key_bits));
for (iter = priv->event_sources; iter; iter++)
{
ClutterEventSource *source = iter->data;
ClutterInputDevice *slave = CLUTTER_INPUT_DEVICE (source->device);
if (clutter_input_device_get_device_type (slave) == CLUTTER_KEYBOARD_DEVICE)
{
rc = ioctl (source->event_poll_fd.fd, EVIOCGBIT(EV_KEY, sizeof (source_key_bits)), source_key_bits);
if (rc < 0)
continue;
for (i = 0; i < NLONGS(KEY_CNT); i++)
key_bits[i] |= source_key_bits[i];
}
}
/* Fake press events for all currently pressed keys */
time_ = g_get_monotonic_time () / 1000;
for (i = 0; i < NLONGS(KEY_CNT); i++)
{
for (j = 0; j < 8; j++)
{
if (key_bits[i] & (1 << j))
notify_key_device (priv->core_keyboard, time_, i * 8 + j, 1, TRUE);
}
}
#undef LONG_BITS
#undef NLONGS
}
/**