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device-manager-x11: Ignore events if no source device is set

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There might be some inconsistent event for which we don't have a known
source device.

In the current state we don't handle them and we could crash when getting
the current device tool.

So, add an utility function that retrieves the source device for an event
that warns if no device is found, and use this for Motion, Key and Button
events.

In case we don't have a valid source in such case, just return early instead
of trying to generate invalid clutter events.

https://gitlab.gnome.org/GNOME/mutter/merge_requests/823


(cherry picked from commit 427670cc638d02f84897ae7fa174de4ac995e7dc)
This commit is contained in:
Marco Trevisan (Treviño) 2019-10-02 20:19:34 +00:00 committed by Marco Trevisan
parent 9c372388da
commit 06202c342b
1 changed files with 30 additions and 8 deletions
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38
src/backends/x11/meta-device-manager-x11.c
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@ -1291,6 +1291,22 @@ handle_raw_event (MetaDeviceManagerX11 *manager_xi2,
}
}
static ClutterInputDevice *
get_source_device_checked (MetaDeviceManagerX11 *manager_xi2,
XIDeviceEvent *xev)
{
ClutterInputDevice *source_device;
source_device = g_hash_table_lookup (manager_xi2->devices_by_id,
GINT_TO_POINTER (xev->sourceid));
if (!source_device)
g_warning ("Impossible to get the source device with id %d for event of "
"type %d", xev->sourceid, xev->evtype);
return source_device;
}
gboolean
meta_device_manager_x11_translate_event (MetaDeviceManagerX11 *manager_xi2,
XEvent *xevent,
@ -1379,6 +1395,10 @@ meta_device_manager_x11_translate_event (MetaDeviceManagerX11 *manager_xi2,
char buffer[7] = { 0, };
gunichar n;
source_device = get_source_device_checked (manager_xi2, xev);
if (!source_device)
return FALSE;
event->key.type = event->type = (xev->evtype == XI_KeyPress)
? CLUTTER_KEY_PRESS
: CLUTTER_KEY_RELEASE;
@ -1413,8 +1433,6 @@ meta_device_manager_x11_translate_event (MetaDeviceManagerX11 *manager_xi2,
event_x11->caps_lock_set =
clutter_keymap_get_caps_lock_state (CLUTTER_KEYMAP (keymap_x11));
source_device = g_hash_table_lookup (manager_xi2->devices_by_id,
GINT_TO_POINTER (xev->sourceid));
clutter_event_set_source_device (event, source_device);
device = g_hash_table_lookup (manager_xi2->devices_by_id,
@ -1458,8 +1476,10 @@ meta_device_manager_x11_translate_event (MetaDeviceManagerX11 *manager_xi2,
{
XIDeviceEvent *xev = (XIDeviceEvent *) xi_event;
source_device = g_hash_table_lookup (manager_xi2->devices_by_id,
GINT_TO_POINTER (xev->sourceid));
source_device = get_source_device_checked (manager_xi2, xev);
if (!source_device)
return FALSE;
device = g_hash_table_lookup (manager_xi2->devices_by_id,
GINT_TO_POINTER (xev->deviceid));
@ -1626,7 +1646,7 @@ meta_device_manager_x11_translate_event (MetaDeviceManagerX11 *manager_xi2,
break;
}
if (source_device != NULL && device->stage != NULL)
if (device->stage != NULL)
_clutter_input_device_set_stage (source_device, device->stage);
if (xev->flags & XIPointerEmulated)
@ -1644,8 +1664,10 @@ meta_device_manager_x11_translate_event (MetaDeviceManagerX11 *manager_xi2,
XIDeviceEvent *xev = (XIDeviceEvent *) xi_event;
double delta_x, delta_y;
source_device = g_hash_table_lookup (manager_xi2->devices_by_id,
GINT_TO_POINTER (xev->sourceid));
source_device = get_source_device_checked (manager_xi2, xev);
if (!source_device)
return FALSE;
device = g_hash_table_lookup (manager_xi2->devices_by_id,
GINT_TO_POINTER (xev->deviceid));
@ -1716,7 +1738,7 @@ meta_device_manager_x11_translate_event (MetaDeviceManagerX11 *manager_xi2,
event->motion.y,
&xev->valuators);
if (source_device != NULL && device->stage != NULL)
if (device->stage != NULL)
_clutter_input_device_set_stage (source_device, device->stage);
if (xev->flags & XIPointerEmulated)