Re: FYI: Vertical reading mode in the Vivaldi browser

The issues in the screenshots look like font issues (missing rotations,
incorrect advances, etc), though I agree that vertical text should not be
supported without some sort style sheet solution.There is a reason we added
alternate style sheets for vertical content in epub. As for support in
browsers, it hasn't been great, but is getting better. Basic layout roughly
works these days, though there are still bugs since it isn't very common to
read vertical text on the web.

On Sat, Feb 3, 2018 at 6:10 AM, Jiminy Panoz <jiminy@chapalpanoz.com> wrote:

> Hum, that’s interesting because we were told explicitly to not do that in
> Readium 2 (horizontal/vertical writing switch).
>
> Mind you, I’m no expert in Japanese typography, I just documented how we
> must implement vertical writing, based on:
>
>    - The International text layout and typography index (
>    https://w3c.github.io/typography/);
>    <https://w3c.github.io/typography/);>
>    - The EBPAJ guide (http://ebpaj.jp/counsel/guide)
>    - The Japanese text layout requirements (https://www.w3.org/TR/jlreq/)
>    - Insights and feedbacks from publishers, with Florian Rivoal as our
>    direct contact.
>
> So I know characters and typesetting change depending on the writing-mode,
> that it’s super tricky to switch from one to another if you don’t have
> heuristics or support for alternate stylesheets (http://www.idpf.org/epub/
> altss-tags/) and we deemed we shouldn’t offer such a setting as long as
> we don’t support alternate stylesheets (which is kinda clear when you take
> a look at the EBPAJ guide BTW).
>
> Out of interest, I did a quick test on this page :
> https://ja.wikipedia.org/wiki/日本語
>
> And results were not necessarily great, especially with the sans-serif
> font.
>
> Some characters like "[" and  "]" in headings are not rotated, same for
> latin characters, etc.
>
> It’s a little bit better with the serif font
>
> but I’ll let experts decide if this sample is acceptable or not,
> considering the original page is using an horizontal writing-mode.
>
> As for pagination, we have a huge issue right now in EPUB with vertical
> writing: there’s nothing in CSS multicol, CSS overflow, etc. to deal with
> it. I raised this issue through a compat issue to the spec editors (
> https://github.com/rachelandrew/multicol-wip/issues/5) but is also
> primarily means this is something for which we’ll have to dedicate efforts.
>
> Best,
>
> Jiminy
>
> Le 03.02.2018 13:16, Ivan Herman a écrit :
>
> Just as a point of interest:
>
> https://vivaldi.com/blog/vertical-reader-why-it-matters/
>
> ----
> Ivan Herman, W3C
> Publishing@W3C Technical Lead
> Home: http://www.w3.org/People/Ivan/
> mobile: +31-641044153 <+31%206%2041044153>
> ORCID ID: http://orcid.org/0000-0003-0782-2704
>
>
>