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Re: [css3-writing-modes] before/after terminology alternative?

From: MURAKAMI Shinyu <murakami@antenna.co.jp>
Date: Tue, 09 Oct 2012 11:43:54 +0900
To: Sylvain Galineau <sylvaing@microsoft.com>
Cc: "Martin J. Dürst" <duerst@it.aoyama.ac.jp>, "liam@w3.org" <liam@w3.org>, Tab Atkins Jr. <jackalmage@gmail.com>, koba <koba@antenna.co.jp>, Koji Ishii <kojiishi@gluesoft.co.jp>, "www-style@w3.org" <www-style@w3.org>, Glenn Adams <glenn@skynav.com>, fantasai <fantasai.lists@inkedblade.net>, "public-i18n-cjk@w3.org" <public-i18n-cjk@w3.org>
Message-Id: <20121009114353.AB53.C598BCD7@antenna.co.jp>
Sylvain Galineau <sylvaing@microsoft.com> wrote on 2012/10/05 4:19:57
> ["Martin J. Dürst":]
> > 
> > Just an additional datapoint in this discussion:
> > 
> > I just noticed that CSS already has properties page-break-before and page-
> > break-after (see http://www.w3.org/TR/CSS2/page.html#page-break-props).
> > Rather obviously, these indicate the same directions as the -before and -
> > after relative direction properties already in XSL-FO, but are orthogonal
> > to the :before and :after pseudo-elements.
> > 
> > These seem not to have caused any significant confusion up to now.
> That it does not seem to have caused confusion may mostly reflect that one
> is much better known than the other.
> Also, when preceded and qualified with the word 'page' I don't see how they 
> could be confusing. As stand-alone directional words before and after are 
> imo potentially confusing for anyone familiar with ::before/::after which is
> to say a very large proportion of CSS authors. 

I'd like to repeat this[1] - 
	I don't think the logical direction before/after conflicts 
	with existing CSS specification, the pseudo elements ::before and ::after.
	The pseudo elements ::before and ::after are for 
	"before the element's content" and "after the element's content" 
	in the DOM tree, and do not mean directions in layout.
	People can easily distinguish them.

[1] http://lists.w3.org/Archives/Public/www-style/2012Sep/0385.html

In addition, I understand that if the actual directions of ::before/::after
pseudo elements are always orthogonal to the before/after logical 
directions, people will be confused easily, but this is not true;
when the ::before/::after pseudo elements have 'display: block' or 
the target elements have block content, the directions are same as 
before/after logical directions. Consider the following example:

	h1::before {
	  display: block;
	  content: "[BEFORE]";
	h1::after {
	  display: block;
	  content: "[AFTER]";

The result will be:



Shinyu Murakami
Antenna House
Received on Tuesday, 9 October 2012 02:44:20 UTC

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