Carlos Garnacho d15c6953d8 backends: Distinguish "no EDID" from "any EDID" mapping tablets
Since the Wacom panel rewrite, the "output" setting is handled as
a kind of tri-state for display-integrated tablets:
- If the setting is unset, the device is automatically mapped
  to an output
- If the setting is set and not empty, the device is mapped to
  the output defined by the EDID data
- If the setting is ['', '', ''], the device is mapped to the
  span of all displays, like opaque tablets do.

This distinction for the unset setting fell through the cracks,
so both "Automatic" and "All displays" options were handled as
the former.

Add this distinction, so that display-integrated tablets can
be used like opaque tablets of sorts with no limitations.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2767>
2022-12-17 11:31:26 +00:00
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