On Wed, 24 Oct 2007 01:53:56 +0200, Jonas Sicking <[EMAIL PROTECTED]> wrote:

fantasai wrote:
Robert O'Callahan wrote:

A related question is whether display:none audio and video elements should produce sound.
 No. "display: none" is defined to affect all media, and that certainly
should not change for <audio> and <video>.

I think this is different than screen readers not speaking display:none text. Both hiding layout frames and silencing screen readers only affect the 'rendering' of the contained text, it doesn't otherwise deactivate the contained display:none elements:

What matters is how display: none is defined [1], and as fantasai mentioned display is media: all, with special processing to boot:

  This value causes an element to generate no boxes in the
  formatting structure (i.e., the element has no effect on
  layout). Descendant elements do not generate any boxes
  either; this behavior cannot be overridden by setting the
  'display' property on the descendants.

  Please note that a display of 'none' does not create an
  invisible box; it creates no box at all.


Other properties like 'visibility' are defined as visual [2] and wouldn't affect audio rendering. With the caveat that it is a working draft that hasn't been updated for a long time, the CSS3 Speech property 'voice-volume' [3] and voice-volume: silent can be seen as analogous to visibility: hidden.

[1] <http://www.w3.org/TR/CSS21/visuren.html#display-prop>
[2] <http://www.w3.org/TR/CSS21/visufx.html#propdef-visibility>
[3] <http://www.w3.org/TR/css3-speech/#voice-volume>

--
Jonny Axelsson, Core Technology, Opera Software AS

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