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compositor: Sync pointer after begin/end modal on X11

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Ensure we issue a motion event for the current pointer position,
as there might be situations where compositor modals get X grabs
from other clients stacked on top, or missed events in between
otherwise.

Ensure the Clutter state is still up-to-date afterwards here. This
replaces some sync_pointer() calls done in GNOME Shell code, always
done after modality changes.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1659>
This commit is contained in:
Carlos Garnacho 2020-12-18 14:59:17 +01:00 committed by Marge Bot
parent 00c7f45a0f
commit 437f5d1c66
3 changed files with 33 additions and 0 deletions
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25
src/backends/x11/meta-backend-x11.c
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@ -921,3 +921,28 @@ meta_backend_x11_reload_cursor (MetaBackendX11 *x11)
meta_cursor_renderer_force_update (cursor_renderer);
}
void
meta_backend_x11_sync_pointer (MetaBackendX11 *backend_x11)
{
MetaBackend *backend = META_BACKEND (backend_x11);
ClutterBackend *clutter_backend = meta_backend_get_clutter_backend (backend);
ClutterSeat *seat = clutter_backend_get_default_seat (clutter_backend);
ClutterInputDevice *pointer = clutter_seat_get_pointer (seat);
ClutterStage *stage = CLUTTER_STAGE (meta_backend_get_stage (backend));
ClutterModifierType modifiers;
ClutterEvent *event;
graphene_point_t pos;
event = clutter_event_new (CLUTTER_MOTION);
clutter_seat_query_state (seat, pointer, NULL, &pos, &modifiers);
clutter_event_set_flags (event, CLUTTER_EVENT_FLAG_SYNTHETIC);
clutter_event_set_coords (event, pos.x, pos.y);
clutter_event_set_device (event, pointer);
clutter_event_set_state (event, modifiers);
clutter_event_set_source_device (event, NULL);
clutter_event_set_stage (event, stage);
clutter_event_put (event);
clutter_event_free (event);
}

2
src/backends/x11/meta-backend-x11.h
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@ -58,4 +58,6 @@ uint8_t meta_backend_x11_get_xkb_event_base (MetaBackendX11 *x11);
void meta_backend_x11_reload_cursor (MetaBackendX11 *x11);
void meta_backend_x11_sync_pointer (MetaBackendX11 *backend_x11);
#endif /* META_BACKEND_X11_H */

6
src/compositor/meta-compositor-x11.c
View File

@ -442,11 +442,17 @@ meta_compositor_x11_monotonic_to_high_res_xserver_time (MetaCompositor *composit
static void
meta_compositor_x11_grab_begin (MetaCompositor *compositor)
{
MetaBackendX11 *backend_x11 = META_BACKEND_X11 (meta_get_backend ());
meta_backend_x11_sync_pointer (backend_x11);
}
static void
meta_compositor_x11_grab_end (MetaCompositor *compositor)
{
MetaBackendX11 *backend_x11 = META_BACKEND_X11 (meta_get_backend ());
meta_backend_x11_sync_pointer (backend_x11);
}
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