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Re: How is it possible to devise such a feeble system?

From: Tantek Celik <tantek@cs.stanford.edu>
Date: Thu, 25 Oct 2001 10:43:10 -0700
To: "Håkon Wium Lie" <howcome@opera.com>, Andrew McFarland <andrew.mcfarland@unite.net>
CC: "www-style@w3.org" <www-style@w3.org>
Message-ID: <SMARTHOST2b4AH1ATIT00005cdf@smarthost.redmond.corp.microsoft.com>
From: Håkon Wium Lie <howcome@opera.com>
Subject: Re: Re:Re: How is it possible to devise such a feeble system?
Date: Wed, Oct 24, 2001, 4:51 PM

> Also sprach Andrew McFarland:
>
>  > What you are wanting to do is center the text vertically in the middle of
>  > the screen (or window). I don't think CSS `knows' what size the screen (or
>  > window) is.
>
> MOst of the CSS formatting model deals with elements (and their
> associated boxes) and not the viewport (a.k.a. window). There is one
> exeption, though. "Fixed positioning" lets you place elements w.r.t
> the viewport. Here is a simple example on how to "center" content in
> the window:
>
>   <HTML>
>   <STYLE>
>   #foo {
>     position: fixed;
>     top: 40%;
>     height: 20%;
>     width: 100%;
>     text-align: center;
>   }
>   </STYLE>
>   <BODY>
>   <DIV id="foo">
>   bar
>   </DIV>
>   </BODY>
>
> "Fixed positioning is supported by Opera and Mozilla.

And IE5/Mac of course. ;-)

Tantek

P.S. In answer to the rhetorical question in the subject line which started
this thread - it is possible to devise such a feeble system (I presume this
is referring to CSS2's lack of vertical block centering) when version two of
a standard becomes a recommendation before version one is even fully
implemented.  The "web developer" audience who would choose to point out
that the emperor had no clothes in this case were too busy with working with
what little CSS1 they could work with to bother giving CSS2 a critical look.

This is another reason why no draft should exit CR without _at_least_ two
interoperable (passing the respective test suite in the same way)
implementations (available, shipping, not experimental) for every feature in
that draft.  Just look at http://w3.org/TR/ to see how many RECs there are
that never met this criteria.

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Received on Thursday, 25 October 2001 14:04:27 GMT

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