[Bug 162200] "Text direction" in page style dialog, with Asian+RTL-CTL, is inconsistent, confusing, and doesn't always set the actual direction

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=162200

--- Comment #5 from Regina Henschel <rb.henschel at t-online.de> ---
(In reply to Eyal Rozenberg from comment #4)
> (In reply to Regina Henschel from comment #2)
> > It would become consistent, when the terms of XSL are used
> > lr-tb
> > rl-tb
> > tb-rl
> > tb-lr
> > 
> > But that would not be understandable for users, so no option.
> 
> Even regardless of ease of understanding - this would change the semantics,
> and drop our current support for bottom-to-top vertical.

It would not change semantics. A "bottom-to-top vertical" mode is not
implemented for page styles.
The four terms I mentioned are exactly the terms used in the file markup. Look
in styles.xml in office:automatic-styles > style:page-layout >
style:page-layout-properties > style:writing-mode

The writing-mode tb-lr is used in traditional Mongolian.

More about the writing-modes is in the upcoming ODF 1.4 standard [1], section
20.404 in part 3. There the "bottom-to-top vertical" mode is called
'sideways-lr' with reference to CSS Writing Modes Level 4.

[1] https://github.com/oasis-tcs/odf-tc/tree/master/docs/odf1.4/csd01

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