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Re: Negative percentages for ACSS pause properties

From: Chris Lilley <Chris.Lilley@sophia.inria.fr>
Date: Mon, 4 Aug 1997 22:14:04 +0200 (MET)
Message-Id: <9708042214.ZM13078@grommit.inria.fr>
To: Liam Quinn <liam@htmlhelp.com>, www-style@w3.org
On Aug 4,  4:02pm, Liam Quinn wrote:

> The current ACSS Working Draft [1] does not forbid negative percentages
> for pause-before, pause-after, and pause.  However, these properties take
> either a percentage or a time, and time values cannot be negative.

Good catch. The intention was not to allow negative values, because
in a time-based layout dimension negative values tend to require new
laws of physics, or excessive buffering; both are bad.

> It
> seems as if the intention is for non-negative percentages for the pause
> properties, though I could imagine negative percentages being used to
> overlap two portions of a document.  (Then again, user agents could not
> properly handle an overlap and still render a document while loading it...
>  I guess this would make negative percentages a Bad Thing.)

I guess it would. Anyone with a real good case for negative percentages
in ACSS pause-before, pause-after, and pause, make it now, or else a
clarification limiting them to non-negative values goes into the next

> [1] http://www.w3.org/Style/Group/WD-acss-970630

Er, actually


is not only world readable, it also has a shorter URL ;-)

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 Monday, 4 August 1997 16:14:43 UTC

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