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MetaWaylandTouch: fix running without touch hardware

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Refuse to create a touch resource if we don't have the capability
(for misbehaving clients), and don't attempt to use touch data
structures that are not initialized.
This commit is contained in:
Giovanni Campagna 2014-07-30 15:45:18 +02:00
parent 65a8f9100c
commit e56f963574
1 changed files with 11 additions and 0 deletions
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11
src/wayland/meta-wayland-touch.c
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@ -452,6 +452,9 @@ meta_wayland_touch_cancel (MetaWaylandTouch *touch)
{
GList *surfaces, *s;
if (touch->display == NULL)
return;
surfaces = s = touch_get_surfaces (touch, FALSE);
for (s = surfaces; s; s = s->next)
@ -533,6 +536,7 @@ meta_wayland_touch_release (MetaWaylandTouch *touch)
clutter_evdev_remove_filter (evdev_filter_func, touch);
g_clear_pointer (&touch->touch_surfaces, (GDestroyNotify) g_hash_table_unref);
g_clear_pointer (&touch->touches, (GDestroyNotify) g_hash_table_unref);
touch->display = NULL;
}
void
@ -543,6 +547,13 @@ meta_wayland_touch_create_new_resource (MetaWaylandTouch *touch,
{
struct wl_resource *cr;
if (touch->display == NULL)
{
wl_resource_post_error (seat_resource, WL_DISPLAY_ERROR_INVALID_METHOD,
"Cannot retrieve touch interface without touch capability");
return;
}
cr = wl_resource_create (client, &wl_touch_interface,
MIN (META_WL_TOUCH_VERSION, wl_resource_get_version (seat_resource)), id);
wl_resource_set_implementation (cr, &touch_interface, touch, unbind_resource);