- From: r12a <ishida@w3.org>
- Date: Mon, 20 Mar 2017 18:32:01 +0000
- To: "Badral S." <badral@bolorsoft.com>, public-i18n-mongolian@w3.org
On 20/03/2017 17:54, Badral S. wrote: > I am trying to understand the mentioned inconsistency in this issue. Are > the overlines defined to be right in CSS? Can you send me the CSS spec > for vertical text decoration? The CSS spec makes a distinction in the Writing Modes spec between 'before'/'after' and 'over'/'under' (or perhaps better named 'line-over'/'line-under') at https://drafts.csswg.org/css-writing-modes-3/#over 'line-over' and 'line-under' are the opposite of 'before' and 'after' locations when text is in writing-mode vertical-lr, but the same for vertical-rl. For CSS text-emphasis-position the default is 'over right'. The terms are used slightly differently here, but the word 'right' is the important one for vertical text. The table below indicates that the expectation is that text-emphasis will appear in vertical orientations to the right by default, even where Chinese favours under for horizontal text. See https://drafts.csswg.org/css-text-decor-3/#text-emphasis-position-property For CSS text-underline-position the word 'under' has a slightly different meaning again (signifying a position that is unlikely to cut through descenders), and the default value (auto) doesn't seem to clearly address the expectation for vertical text defaults. The example in that section for CJK text implies, however, that CSS expects that by default user agents will position underlines to the right for Japanese and Korean, but to the left for Chinese text. There is no mention of Mongolian. Overlines appear on the opposite side of the text from the underline. See https://drafts.csswg.org/css-text-decor-3/#text-underline-position-property For CSS ruby-position in the current draft the default is 'over' (in the sense defined for writing modes), ie. ruby appears to the right, whether the text is vertical-lr or vertical-rl. See https://drafts.csswg.org/css-ruby-1/#rubypos hope that helps, ri
Received on Monday, 20 March 2017 18:32:14 UTC