W3C home > Mailing lists > Public > www-style@w3.org > September 2008

Re: border-radius

From: Brad Kemper <brkemper.comcast@gmail.com>
Date: Wed, 3 Sep 2008 09:38:00 -0700
Cc: Nick_Hofstede@inventivegroup.com, www-style@w3.org
Message-Id: <03C21332-4481-462D-B278-EF1B70E22962@gmail.com>
To: fantasai <fantasai.lists@inkedblade.net>

On Aug 14, 2008, at 11:11 AM, fantasai wrote:

> <p>The UA may apply the border-radius properties to <code>table</code>
> and <code>inline-table</code> elements when <code>border-collapse</ 
> code>
> is <code>collapse</code>

Note that even this has implications (not bad ones, IMO). For  
instance, if the table has a non-zero border-radius, and the internal  
table elements all have zero (computed, at least) border-radius, the  
implication is that if we ever DID allow internal table elements to  
have non-zero border-radii, then the following would also be true:

At least if the border-radius of the outer element is larger than the  
inner element, then the outer element's border-radius takes precedence  
over that of the inner element. Thus:

If the TABLE's border-radius takes precedence over the TBODY's border- 
If the TBODY's border-radius takes precedence over the TR's border- 
If the TR's border-radius takes precedence over the TD's border-radius

... or at least in cases where those elements on the left side of the  
above 3 statements are non-zero radii, and those elements on the right  
side are have smaller (or zero) radii.

I think that would work well, and you might want it reversed when the  
the inner elements have radii larger than their ancestors within the  

> but is not required to.

Why not?

> In this case not only
> must the border radii of adjacent corners not intersect, but the radii
> of a single corner may not extend past the boundaries of the cell at  
> that
> corner.

To what end? If I understand correctly, that would seem to prevent the  
following, which seems like it might be useful sometimes:

         XX^^          |          ^^XX
        X^ ____________|_____________^X
       XX              |              XX
       X               |               X
       XX _____________|____________  XX
        Xv             |             vX
         XXvv          |          vvXX

BTW, this calls to mind another issue. Could text within an element  
that has border-radius be allowed to follow the curve? Or does it  
always have to keep a nice square corner? For large radii and small  
text, it would be nice to be able to follow the curve sometimes. But  
not always.
Received on Wednesday, 3 September 2008 16:38:41 UTC

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