W3C home > Mailing lists > Public > www-style@w3.org > January 2012

We can't center vertically if we don't know the height of the box and container

From: Matthew Wilcox <elvendil@gmail.com>
Date: Thu, 5 Jan 2012 11:40:49 +0000
Message-ID: <CAMCRKiL5mNwc8qJ8nqnetG1424dFUWh0ehsfsujEW8w6xOkCRQ@mail.gmail.com>
To: www-style@w3.org
Is this being looked at?

To quote from a blog post I wrote on the topic recently:

For the love of all that is good in the world, I can not see why this
is still a problem in CSS. We get hardware-accelerated CSS filters,
but we still can’t get a box to centre vertically if we don’t know the
box height and container height. Evidently no designers want to do
that or no cows have wandered down that path, or all the one’s that
did walked off a cliff and were never heard of by the CSS-WG. You
might expect vertical-align:middle; to work. Well, don’t we all.

There’s a hack to do it, but the problem with using display:table is
that accessible agents derive a semantic meaning from the CSS
declaration and read it out as a table. Yes, I agree that sounds
pretty backward to me too, but that’s what happens. Which means the
hack is harmful to accessibility. Why the CSS-WG don’t just allow
vertical-align:middle; on non-cell properties I don’t know.

So, now I ballsed up and joined the list - can someone please explain
this, and can we fix it?
Received on Thursday, 5 January 2012 11:44:11 UTC

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