Re: Proposal for 2.11 Action-518

Excellent. Just to clarify this proposal is a merging of 2.11.2, 2.11.3,
and 2.11.4.

Jim

On Thu, Jun 28, 2012 at 11:44 AM, Jeanne Spellman <jeanne@w3.org> wrote:

> ACTION-518: Combine 2.11.2-4 (auto and executable content) into 1 sc with
> IER
>
> Proposed
>
> 2.11.2  Control of Autoplay:  The user controls the autoplay of time-based
> media such that all the following are true:
> * the user can override autoplay on load
> * a placeholder provided by either the author or the user agent is
> displayed to the user
> * the user can toggle play function for the media.
>
> IER:
> Users who need to avoid signals that may trigger seizures, users who are
> easily distracted, and users who have difficulty interacting with the
> controls provided for playing media need to be able to load media in a
> paused state by default. The user agent provides a global control that sets
> a state equivalent to "paused waiting for user interaction" for all
> recognized media when a page loads. As an opt-in user setting, autoplay for
> media is off/paused, until the user activates 'play'. The user agent
> provides a visual or auditory (as appropriate) indicator that the video is
> in paused state and needs user interaction to start. This prevents media
> from playing without explicit request from the user.
>
> Note: Some web applications and document may be essentially empty until
> scripts are run. However, it is still important for users to have this
> level of control.
>
> There may times when media doesn't have a native control in the page. That
> is, the media is not in the actual document, but rather has simply been
> created with document.createElement('audio'**). Here, the user agent does
> not recognize that the media exists. The user agent cannot give a visual
> indication by default, as it wouldn't be clear where that indication should
> appear in the page. At that stage, it will be up to the author to provide
> the controls See WCAG in resources below.
>
> Examples:
> Evan is blind. He sets the option in his browser so that when a web page
> loads it does not automatically run an executable object, so that any or
> music or speech they play won't interfere with his ability to hear his
> screen reader. When he is ready to start it playing he navigates to the
> placeholder and presses the Enter key to activate it.
>
> Jane has difficulty concentrating. In order to concentrate on the text of
> a document she wants to prevent any animations, media, or dynamic content
> from executing until she is ready. She clicks on the placeholder image when
> she wants to start the content.  She can pause the content when she wants
> to go back to reading the text.
>
>


-- 
Jim Allan, Accessibility Coordinator & Webmaster
Texas School for the Blind and Visually Impaired
1100 W. 45th St., Austin, Texas 78756
voice 512.206.9315    fax: 512.206.9264  http://www.tsbvi.edu/
"We shape our tools and thereafter our tools shape us." McLuhan, 1964