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
