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RE: How does the svg element handle CSS border and background-color?

From: Patrick Dengler <patd@microsoft.com>
Date: Mon, 23 Aug 2010 23:37:01 +0000
To: Ian Hickson <ian@hixie.ch>, Tony Schreiner <tonyschr@microsoft.com>
CC: Kevin Ar18 <kevinar18@hotmail.com>, "www-svg@w3.org" <www-svg@w3.org>
Message-ID: <4A2DB3AE4504E944AF122BBFBA7FBA1F53A35D81@TK5EX14MBXC112.redmond.corp.microsoft.com>
Hi Ian,

At the last SVG Face to Face, we were debating how and where to answer these questions about SVG embedded in HTML.  I am not sure from your answer below whether you intend to visit this in the HTML working group, or whether you expect us to define this within the SVG Working Group.

At the very least, at the SVG Face-to-Face, a few vendors agreed to push some tests up somewhere so we could make sure we agree on the scenarios to start.

Are there areas in the spec that clearly define the expected behavior as we move forward with SVG in HTML?  I think that we need to think of it beyond foreign content and more like stylable, scriptable, vector graphics integrated into web pages.

Patrick Dengler


-----Original Message-----
From: www-svg-request@w3.org [mailto:www-svg-request@w3.org] On Behalf Of Ian Hickson
Sent: Saturday, August 21, 2010 11:22 AM
To: Tony Schreiner
Cc: Kevin Ar18; www-svg@w3.org
Subject: RE: How does the svg element handle CSS border and background-color?

On Thu, 19 Aug 2010, Tony Schreiner wrote:
>
> I strongly disagree with Jeff's interpretation of the spec. I have yet 
> to find the behavior clearly spelled out in any combination of specs 
> but the HTML5 spec says the following:
> 
> "The svg element from the SVG namespace falls into the embedded 
> content, phrasing content, and flow content categories for the 
> purposes of the content models in this specification."
> 
> Between this, working with our own CSS experts, and working from first 
> principles with the long-term future of SVG in mind, I've understood 
> this to mean that when an <svg> element is embedded in HTML5 or XHTML, 
> that outermost element does participate in the box model, and as such 
> CSS formatting such as backgrounds, borders, margin, and padding 
> should apply to that outermost SVG element, just like it would to a 
> <div>, <img>, <iframe> or any similar element.

The line you cite does not mean that. All it means is that for the purposes of document conformance -- something that only affects authors, validators, and editors (including contenteditable implementations), but does not affect in any way CSS rendering rules or parsing or anything like that -- the <svg> element falls into certain content model categories.

You should never need to read between the lines in the HTML spec; I've tried to make everything very explicit.

-- 
Ian Hickson               U+1047E                )\._.,--....,'``.    fL
http://ln.hixie.ch/       U+263A                /,   _.. \   _\  ;`._ ,.
Things that are impossible just take longer.   `._.-(,_..'--(,_..'`-.;.'
Received on Monday, 23 August 2010 23:37:36 GMT

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