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wayland: Only send full sequences of touch events to clients
If input happens to be grabbed somewhere along the shell, and ungrabbed while a touch operation is ongoing, the wayland bits will happily start sending wl_touch.update events from an undeterminate point, without clients having ever received wl_touch.down for that id. Consider those touches grabbed for the entirety of their lifetime, if wl_touch.down wasn't received by the client, no other events will. https://bugzilla.gnome.org/show_bug.cgi?id=776220
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@ -56,6 +56,7 @@ struct _MetaWaylandTouchInfo
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gfloat x;
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gfloat y;
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guint updated : 1;
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guint begin_delivered : 1;
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};
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static void
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@ -278,6 +279,8 @@ handle_touch_begin (MetaWaylandTouch *touch,
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wl_fixed_from_double (touch_info->x),
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wl_fixed_from_double (touch_info->y));
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}
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touch_info->begin_delivered = TRUE;
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}
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static void
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@ -292,7 +295,7 @@ handle_touch_update (MetaWaylandTouch *touch,
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sequence = clutter_event_get_event_sequence (event);
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touch_info = touch_get_info (touch, sequence, FALSE);
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if (!touch_info)
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if (!touch_info || !touch_info->begin_delivered)
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return;
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l = &touch_info->touch_surface->resource_list;
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@ -321,12 +324,15 @@ handle_touch_end (MetaWaylandTouch *touch,
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if (!touch_info)
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return;
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l = &touch_info->touch_surface->resource_list;
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wl_resource_for_each(resource, l)
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if (touch_info->begin_delivered)
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{
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wl_touch_send_up (resource, touch_info->slot_serial,
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clutter_event_get_time (event),
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touch_info->slot);
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l = &touch_info->touch_surface->resource_list;
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wl_resource_for_each(resource, l)
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{
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wl_touch_send_up (resource, touch_info->slot_serial,
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clutter_event_get_time (event),
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touch_info->slot);
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}
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}
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g_hash_table_remove (touch->touches, sequence);
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