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Re: [css3-background] "Margins are always transparent" missing

From: Simon Sapin <simon.sapin@exyr.org>
Date: Thu, 11 Apr 2013 00:56:52 +0200
Message-ID: <5165EE34.30507@exyr.org>
To: www-style@gtalbot.org
CC: W3C www-style mailing list <www-style@w3.org>
Le 11/04/2013 00:06, "Gérard Talbot" a écrit :
>> You can talk about the initial value of background-clip
>> as "the default", but it’s really paraphrasing what’s already defined.
> Where exactly do you see "background-clip" in the following image or flash
> object?
> Where exactly do you see "background painting area" in the following image
> or flash object?
> http://www.hicksdesign.co.uk/journal/3d-css-box-model
> http://www.redmelon.net/tstme/box_model/

Well, that’s kind of my point: The image and flash object are incomplete 
for UAs that support css3-background.

In CSS 2.1, the background painting area (although the concept is not 
named) is always the border area of a box. This is what (among other 
things) the image of flash object describe.

css3-background normatively and unambiguously redefines the concept.

I still think it’s redundant, but would it address your concern to add a 
note like this in the definition of background-clip?

> Note: there is no 'margin-box' value. The background painting area
> never extends into the margins.

Simon Sapin
Received on Wednesday, 10 April 2013 22:57:15 UTC

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