W3C home > Mailing lists > Public > www-style@w3.org > August 1997

Re: Negative percentages for ACSS pause properties

From: Chris Lilley <Chris.Lilley@sophia.inria.fr>
Date: Wed, 6 Aug 1997 17:47:38 +0200 (MET)
Message-Id: <9708061747.ZM18922@grommit.inria.fr>
To: Liam Quinn <liam@htmlhelp.com>, raman@Adobe.COM, www-style@w3.org
On Aug 4,  6:38pm, Liam Quinn wrote:

>   If a UA is to handle negative pauses of any amount, it must
> process the entire document before rendering any of it.  While specifying -
> 1000s is silly, UAs will need to be aware of some kind of minimum value (-
> 5s?) to allow rendering while the document is loaded.

I don't think that requiring buffering is going to add much value. I would
be glad of arguments for and against.

> If ACSS allows negative pauses, I think it should give a suggested minimum
> that UAs should consider, or (probably better) specify that UAs can
> arbitrarily set negative pauses to any larger amount up to zero.

That would make the stylesheets somewhat less interoperable, I suspect.

>  With the
> latter option, UAs could set their own threshold (perhaps based on the
> amount of buffering the UA does), and could change extremely small values
> like -1000s to something more reasonable, like -5s or 0.

Note that setting buffering to 5s means accepting an additional 5s
delay between clicking on a link and getting any of the content, compared
to the situation where negative values are not allowed.

There are probably better ways to synchronise different media.

Chris Lilley, W3C                          [ http://www.w3.org/ ]
Graphics and Fonts Guy            The World Wide Web Consortium
http://www.w3.org/people/chris/              INRIA,  Projet W3C
chris@w3.org                       2004 Rt des Lucioles / BP 93
+33 (0)4 93 65 79 87       06902 Sophia Antipolis Cedex, France
Received on Wednesday, 6 August 1997 11:47:55 UTC

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