Lack of support for applying extra spacing between Japanese and Western text

w3c / jlreq

Text Layout Requirements for Japanese

https://w3c.github.io/jlreq/

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Lack of support for applying extra spacing between Japanese and Western text #312

Open xfq opened 2 years ago

xfq commented 2 years ago

This issue is applicable to Chinese and Japanese.

In Japanese composition, it is usually recommended to apply extra spacing between Japanese and Western text to increase the recognition of Western text.

Currently, browsers do not support this feature, so content authors have to work around the problem by adding spaces manually.

For more details, see this GitHub issue, which is being used to track this gap. Please discuss this issue there.

xfq commented 2 years ago

The first comment in this issue contains text that will automatically appear in one or more gap-analysis documents as a subsection with the same title as this issue. Any edits made to that comment will be immediately available in the document. Proposals for changes or discussion of the content can be made in comments below this point.

Relevant gap analysis documents include: _Chinese • Japanese_

frivoal commented 2 years ago

There exists a css-property to deal with that in css-text-4: https://drafts.csswg.org/css-text-4/#text-spacing-property

text-spacing: ideograph-alpha ideograph-numeric

I don't believe it to be implemented anywhere yet, though.

xfq commented 2 years ago

@frivoal Yeah, I also mentioned it in https://github.com/w3c/clreq/issues/401 (although I didn't mention ideograph-numeric). I think the current CSS spec has at least two potential issues:

First, this spacing is currently not customizable. See https://github.com/w3c/jlreq/issues/163 for more details.
Second, text-spacing does not currently support non-CJK languages. See the thread in https://github.com/w3c/clreq/issues/401#issuecomment-947220001

r12a commented 2 years ago

Hmm. This discussion would be better held at https://github.com/w3c/clreq/issues/401, since it is the issue which is being tracked by the gap pipeline. Implementers using the pipeline may not see this thread.

(Perhaps the boilerplate text should indicate where to hold discussions.)

MurakamiShinyu commented 2 years ago

FYI,

There exists a css-property to deal with that in css-text-4: https://drafts.csswg.org/css-text-4/#text-spacing-property

text-spacing: ideograph-alpha ideograph-numeric

I don't believe it to be implemented anywhere yet, though.

text-spacing: ideograph-alpha ideograph-numeric is being implemented in Vivliostyle very recently.

https://github.com/vivliostyle/vivliostyle.js/pull/814