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RE: [css3-text-layout] New editor's draft - margin-before/after/start/end etc.

From: Ishii Koji <kojiishi@gluesoft.co.jp>
Date: Thu, 10 Jun 2010 17:55:40 -0400
To: John Daggett <jdaggett@mozilla.com>, "MURATA Makoto (FAMILY Given)" <eb2m-mrt@asahi-net.or.jp>
CC: "www-style@w3.org" <www-style@w3.org>
Message-ID: <A592E245B36A8949BDB0A302B375FB4E09E611D7BD@MAILR001.mail.lan>
I'm new to this ML, so please forgive me if I miss something already discussed.

I tried to follow this thread as much as possible, but I just don't understand the need for these things. I also don't understand why margin-top is for top even in vertical text flow. Could anyone point me where this is defined?

I could find some reference for block-flow property at:

and this mentions that:
LR layout '*-left' is analogous to TB's '*-top'

This behavior matches to what I expect. But it sounds like we're doing opposite for writing-mode if I understand correctly.

I would vote the writing-mode should be consistent with the block-flow property. Could someone please tell me what I'm missing?

-----Original Message-----
From: www-style-request@w3.org [mailto:www-style-request@w3.org] On Behalf Of John Daggett
Sent: Wednesday, June 09, 2010 1:47 PM
To: MURATA Makoto (FAMILY Given)
Cc: www-style@w3.org
Subject: Re: [css3-text-layout] New editor's draft - margin-before/after/start/end etc.

> > I strongly suggest that rather than simply add features to CSS3 Text 
> > Layout we first consider the potential impact that vertical text 
> > modes will have on the whole of CSS.
> Although your approach would provide a better balance and consistent 
> design eventually, I am very worried about the wide scope of such an 
> approach and very significant delays that might caused by it.
> "The Requirements for Japanese Text Layout" (W3C Note) was started as 
> a reply to questions and requests similar to yours.  The project dates 
> back to 2005.  Members of the project has spent enourmous amount of 
> time.

Right, the "The Requirements for Japanese Text Layout" is a fantastic description of the rules of Japanese layout.  But it's clear to me that vertical text layout isn't a simple *addition* to CSS, it's a reworking of CSS; very basic properties need to be rethought, adjusted, tweaked, etc.

That's why I think it's important to try and understand the full scope of how vertical text affects CSS, to simply list existing properties and how they might be affected. Doesn't need to be a PhD thesis, just a simple methodical analysis that covers CSS 2.1 and additions proposed for CSS3.

John Daggett

Received on Thursday, 10 June 2010 23:13:52 UTC

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