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Re: css3-selectors Summary of Comment

From: Michael Cooper <cooper@w3.org>
Date: Wed, 18 Nov 2009 12:37:03 -0500
Message-ID: <4B0430BF.5030801@w3.org>
To: fantasai <fantasai.lists@inkedblade.net>
CC: Janina Sajka <janina@rednote.net>, www-style@w3.org, W3C WAI Protocols & Formats <w3c-wai-pf@w3.org>, List WAI Liaison <wai-liaison@w3.org>
Sorry, I forgot to include a URI for our formal acceptance:
http://www.w3.org/2009/11/18-pf-minutes.html#item03 (Member-only)

Again, confirming that PFWG accepts the disposition of the comments on
CSS selectors below.


fantasai wrote:
> Janina Sajka wrote:
>> The Protocols and Formats Wg has the following comments regarding
>> Selectors Level 3 last call at
>> http://www.w3.org/TR/2009/WD-css3-selectors-20090310. PF thanks Cynthia
>> Shelly of Microsoft for leading our review of this draft, and we
>> apologize for our late response to this last call.
> Thank you for your review of the Selectors Level 3 last call.
> The CSS Working Group responds as follows.
>> --------------------------------------------------------------------------------
>> Pseudoclasses:
>> We ask that there be support for ARIA states and properties [1] as
>> pseudoclasses.
>> Many of these are similar to things that are currently supported as
>> pseudoclasses,
>> in that they can be set in multiple ways.  For example, "checked" can
>> be set
>> from an HTML attribute, from aria-checked, or by user action.  It is
>> useful for
>> a CSS author to be able to style all checked things the same,
>> regardless of how
>> they came to be checked.   Ask whether the CSS WG thinks it's better
>> to make that
>> part of the selectors spec, part of the ARIA spec, or something
>> else.  Is there
>> an extensibility mechanism for psudoclasses.
> The CSS Working Group considers this request out-of-scope for Selectors.
> Selectors doesn't define when an element is in the "checked" state, only
> that a ':checked' pseudo-class matches when the element is in a "checked"
> state. It is up to the document language, whether that be defined by the
> DocBook spec or by a combination of HTML5+DOM3+SVG+ARIA, to define when
> an element is in the checked state.
>> Hover, active, focus:  All elements should be able to take those states.
>> Any element that receives focus should be able to make use of those.
>> With ARIA and with HTML 5, any element can be focusable.  Before that,
>> form elements and buttons are also focusable.
> While Selectors recognizes that there may be document language or
> implementation-specific limits on which elements can be :active
> or acquire :focus, it does not impose any such limits. If ARIA+HTML5
> defines all elements to be focusable, then the :focus pseudo-class
> can potentially apply to any element in the document.
>> ::before and ::after may offer a work-around to accessibility issues
>> with generated content not being in the DOM.  PFWG thinks this is a
>> useful feature and wants to see it supported.
> The CSSWG also wants to see ::before and ::after supported. :) (There
> are already multiple implementations of this feature, btw.)
>> What was the ::selection pseudo-element, and why was it removed?  From
>> its name it seems it could be quite useful for ARIA-based applications,
>> which manage their own selection.
> The ::selection pseudo-element allowed the styling of a selection, e.g.
> changing the highlight and text color. It was removed because the details
> of its behavior were poorly defined, and would take significant effort to
> work out; also implementations would then have to converge on those
> details.
> The CSS Working Group felt it was more important to complete Selectors
> Level 3, since all other features in the draft were well-supported,
> and to
> defer ::selection to a future module such as Selectors Level 4. There is
> interest in pursuing this feature, but not in this draft.
> Please let us know if this adequately addresses your comments.
> ~fantasai


Michael Cooper
Web Accessibility Specialist
World Wide Web Consortium, Web Accessibility Initiative
E-mail cooper@w3.org <mailto:cooper@w3.org>
Information Page <http://www.w3.org/People/cooper/>
Received on Wednesday, 18 November 2009 17:37:14 UTC

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