- From: Koji Ishii <kojiishi@gmail.com>
- Date: Sat, 17 Jan 2015 19:53:24 +0900
- To: "www-style@w3.org" <www-style@w3.org>
- Cc: CJK discussion <public-i18n-cjk@w3.org>, Henrik Andersson <henke@henke37.cjb.net>
I’m revising the proposal after discussed with Unicode experts. 1. Change the 5th bullet of 5.1 Line Breaking Details[1] to force a soft wrap opportunity both before and after a replaced element and other atomic inline for web-compatibility, but not by changing the behavior of U+FFFC nor the rule orders of UAX#14. 2. Add ‘line-break-string’ property. When this property is set to a string of 1 character length, the element looks as if its text is the character to line breakers and justification algorithms. TL;DR; changing the order of rules are usually not allowed in libraries such as ICU, and therefore makes implementations hard. It’s better to handle application specific behavior outside of the UAX#14 if desired for backward compatibilities or for any other reasons. One of the experts recommended ID (Ideographic) class[2] for inline images such as Emoji. One idea is to have a boolean property to opt-in to this behavior. Another idea was to for authors to specify UAX#14 class. Among the three options, I think the 1 character length string gives the best flexibility. I’ll try edits to the ED and will let you know, but any feedback are appreciated anytime. [1] http://dev.w3.org/csswg/css-text-3/#line-break-details [2] http://unicode.org/reports/tr14/#ID /koji On Jan 15, 2015, at 12:53 PM, Koji Ishii <kojiishi@gmail.com> wrote: > On Thu, Jan 15, 2015 at 12:36 AM, Henrik Andersson > <henke@henke37.cjb.net> wrote: >> Koji Ishii skrev: >> >> I vote "pass the bucket". "Can" does not mean "should" or "must". Let a >> higher level line breaking deal with it. > > I was ambiguous, "Can break" here means that it's a break opportunity, > and therefore lines break if Emoji is at the end of line but no > otherwise. > > It's a MUST to break before and after Emoji (and any other replaced > elements) from the spec perspective. > > One idea that came up in my mind is to add the "line-break-string" > property, that can set a string to use to determine line-breaking and > justification opportunity purposes. > > What do you think? > > /koji
Received on Saturday, 17 January 2015 10:52:33 UTC