https://bugs.freedesktop.org/show_bug.cgi?id=62355

--- Comment #8 from Yury <[email protected]> ---
Even the simplest use of combining diacritics like {hat A} or {tilde A} *by
means of formula editor "catalog"* might go wrong.

The BIG problem is glyphs accessed via "catalog" (tilde, hat etc.) are taken
from the "Open Symbol" face, included in LibO out-of-the-box (at least on
Linux). And so, certain combinations of glyph heights of body text face and
"Open Symbol" diacritics just go wrong.

E.g., "Open Symbol" diacritics combine well with "Gentium Plus" capitals, but
no so well with "Linux Libertine O" capitals. So not every font face is
actually usable in Formula Editor!

IF one changes the "catalog" face from "Open Symbol" to something else (in
Tools->Options->Fonts dialog), one is not out of the woods yet. There is
another, related problem, which *probably* merits another ticket: formula
renderer assumes (?) the combining diacritics in the "catalog" face do not
actually combine. Or something. The fact is some combinations of faces are
rendered with diacritics far to the left of the glyph over which it ought to be
placed.

I'm attaching the sample doc, all set in "Gentium Plus", and TWO screenshots,
rendered (1) with font substitution "Open Symbol->Gentium Plus" AND (2) without
such substitution.
The doc contains: (1) plain text "A {tilde A}" equivalent (shows the correct
tilde placement); (2.1) formula "A {tilde A}", with "Gentium Plus" tilde (not
so correct placement); (2.2) same formula with "Open Symbol" tilde (not correct
at all).

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