Five _x11_raw accesses in shared event.c (the worst architectural leak)
removed by widening vtable signatures and moving X11-only logic into
the X11 backend:
WME_SELECTION_REQUEST / WME_SELECTION_CLEAR
* handle_selection_request/clear functions deleted from event.c
* Reimplemented in x11_backend.c as x11_handle_selection_request/clear
where they read _x11_raw internally and call XChangeProperty etc.
* New vtable slots handle_selection_request / handle_selection_clear
(WMEvent*). Wayland: no-ops (wmaker UI does not own a WM_Sn
selection on the X server).
WME_CONFIGURE
* event_randr_update vtable widened to (WMEvent*).
* Root-window check (DefaultRootWindow) moved into x11 impl.
WME_MAPPING
* Dropped the if (xev) guard — keyboard_mapping_refresh already
took WMEvent*.
WME_SELECTION
* xdnd_process_selection vtable widened to (WMEvent*).
Net: event.c is X11-free except for DefaultRootWindow uses elsewhere
that will be cleaned up in subsequent tasks.
Window Maker
Levi Neely