Re: [css-ruby] Add "text-orientation: upright" for bopomofo annotation

On 08/25/2015 02:59 PM, Xidorn Quan wrote:
> Hi,
> I propose that we should add "text-orientation: upright" to the
> "rt:lang(zh-TW)" rule.
> The reason is that, all the tone marks in bopomofo (U+02CA, U+02C7,
> U+02CB, U+02D9) have Vertical_Orientation property "R" while the
> bopomofo characters are all "U". It means, without explicitly setting
> text-orientation to upright, the text run would break between them,
> which makes it impossible to use font feature to place the tone mark
> properly.

I think it would make more sense to have Unicode update UTR50 to make
these characters upright in mixed-orientation text (or otherwise tailor
it within CSS as a whole). It's not just a problem with ruby.


Received on Tuesday, 25 August 2015 14:16:29 UTC