On Mon, Jun 29, 2015 at 7:44 AM, Xidorn Quan <quanxunzhen@gmail.com> wrote: > > Masayuki-san mentioned another issue in Twitter: > https://twitter.com/d_toybox/status/615061112019513344 > > This does seem to be an issue. > > In our current spec, the positions of underline and ruby annotation are: > * if underline position is right, the underline is put to the right of the > text content [1] > * the margin box of rbc and rtc are put without intervening space [2] > > This means, if both underline and ruby annotation are specified, and > author doesn't add any space to either the base or the annotation, the > underline and annotation may overlap each other in some fonts. > > I have no idea how this issue could be solved. If we want to change the > position of underline, the only option is to move it inwards, which may > make it overlap with the base text. Hence we cannot do that. > Yeah, that's a tough one. We need to invent something to make a good compromise, because paper-printed materials solve this issue by relying on its high DPI, but screens do not have that luxury yet. Changing position of ruby annotation isn't quite a good option either, > since it could break interop. But given the interop has already been broken > due to the height of inline box being UA-defined [3], we probably can do > something there? > > [1] http://dev.w3.org/csswg/css-text-decor-3/#underline-right > [2] http://dev.w3.org/csswg/css-ruby/#ruby-layout > [3] https://lists.w3.org/Archives/Public/www-style/2015May/0276.html > I'm leaning not to define the positioning too much in details in this level, so UA-dependent looks good to me. /koji
Received on Monday, 29 June 2015 08:11:58 UTC