localization of ui

[Khaled Hosny]

On Fri, Oct 28, 2016 at 01:24:42PM +0200, Eike Rathke wrote:
> > My recent goal is showing traditional mongolian horizontally left to
> > right (in UI) just like english is OK, so I think vcl should already
> > OK to handle this .?
> 
> I don't know what happens if you use characters of a right-to-left (RTL)
> script and try to display them left-to-right instead. Some part of the
> glyph layout might be confused at the end..

AFAIK, traditional Mongolian has no history of being written
horizontally, it is one of the vertical-only scripts. But if it must be
written horizontally, then it seems the current practice is to write it
from left to right. Mongolian OpenType fonts are also designed to be
left to right when the text is laid out horizontally.

When laid out vertically, Mongolian lines start from the left side of
the page not the write side as CJK scripts. LibreOffice seems to support
this internally, but we have no UI to enable it:
https://bugs.documentfoundation.org/show_bug.cgi?id=61846
https://bugs.documentfoundation.org/show_bug.cgi?id=33278

Regards,
Khaled
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