Dear LyX developers,
The 'accent-*' LFUNs place a combining Unicode behind the to-be-accented
char and normalize them if possible.
Without normalization, the expansion of combining Unicode chars fails for
Cyrillic and Greek letters.
Example: "accent-tilde alpha" becomes \~{\textgreek{a}} which places the
accent before the letter.
(For a LyX test file, see http://www.lyx.org/trac/ticket/6463)
For a generic solution, we would need to
* Revert the application of “combining” and “textgreek” features, so
that the accent markup comes inside the \textgreek definition, e.g.
\~{\textgreek{a}} -> \textgreek{\~{a}}.
* Remove the braces around the argument for Greek (implemented in trunk)
\textgreek{\~{a}} -> \textgreek{\~a}.
Or use a proper accent setup for LGR font encoding
(see http://milde.users.sourceforge.net/ and
http://milde.users.sourceforge.net/lgrenc-accents.def)
For the Greek perispomeni (tilde/circumflex), we could
Define a new LFUN accent-perispomeni (inserting COMBINING GREEK
PERISPOMENI)
resulting in two LFUNS for the same visual effect with different
semantics:
The Greek perispomeni accent
• looks like a tilde,
• has the semantic and etymology of a circumflex accent.
Therefore,
• there is a separate Unicode character, COMBINING GREEK PERISPOMENI (0x0342),
• <Greek letter> + COMBINING TILDE is not normalized to the corresponding
“... WITH PERISPOMENI” letter.
However,
* in LaTeX, the "asciitilde" '~' is used for input of both, the tilde
accent and the Greek perispomeni.
* Two LFUNs would also require two keybindings for a ~-accent on either
Greek or non-Greek characters.
This is why I ask for a consensus on how to proceed.
Günter
