[Libreoffice-bugs] [Bug 49549] FILESAVE PPT PPTX Overlining lost after saving & reopening file

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=49549

--- Comment #18 from Valek Filippov <frob at df.ru> ---
(In reply to NISZ LibreOffice Team from comment #17)
> (In reply to Buovjaga from comment #16)
> > The same also happens when saving as PPTX.
> > 
> > Is this a limitation in PPT (or even present-day PPTX)? It is hard to find
> > out this type of historical information.
> 
> Even current MSO 2019 does not support overline character formatting, only
> underline and strikethrough.

This looks similar to tdf#56080 -- both are asking to do something which is not
natively supported by destination format.

When one saves into non-native format LO shows a message:
"This document may contain formatting or content that cannot be saved in the
currently selected file format <...>".
So... if this warning is ignored... then... whose fault is that?

I don't think this is "major, because of the data loss", unless it fails to
save overlines in The Good Format.
It looks more like "Enhancement".

Possible implementation could add one line with proper style in the right
position per line of text and probably group it.
However, that will not work well on opening the file unless LO is allowed to
store some "vendor extension" to read it back.

Let me stop here before it started to sound as "WONTFIX"... ;)

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