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Re: [svg2] paint-order (more a CSS syntax question)

From: Dirk Schulze <dschulze@adobe.com>
Date: Mon, 7 Jan 2013 07:04:08 -0800
To: Erik Dahlstrom <ed@opera.com>
CC: "www-svg@w3.org" <www-svg@w3.org>
Message-ID: <3B256C07-4248-4026-94DD-07B5CD1F5C06@adobe.com>

On Jan 7, 2013, at 7:02 AM, "Erik Dahlstrom" <ed@opera.com> wrote:

> On Mon, 07 Jan 2013 15:37:51 +0100, Dirk Schulze <dschulze@adobe.com>  
> wrote:
> 
>> 
>> On Jan 7, 2013, at 4:17 AM, Erik Dahlstrom <ed@opera.com> wrote:
>> 
>>> A question about the 'paint-order' property [1]:
>>> 
>>> the double bars, ||, that separate the values in 'paint-order'. Does CSS
>>> say what is the expected result is when a value keyword is repeated more
>>> than once? I'm looking at CSS3 Syntax, and I don't see a clear  
>>> answer[2].
>>> 
>>> Consider the following cases:
>>> 
>>>  paint-order: fill fill;
>>>  paint-order: stroke markers stroke;
>>> 
>> 
>> The proper spec is CSS Values and Units [1]:
>> 
>> ""
>> A double bar (||) separates two or more options: one or more of them  
>> must occur, in any order.
>> ""
> 
> Same as in the CSS3 Syntax spec then.
> 
>> In your case it is exclusive. A value does not occur more then once,  
>> like for the 'background' shorthand [2].
> 
> Perhaps I'm interpreting this the wrong way, but where in the CSS spec(s)  
> does it say it is exclusive?
> 
> "one or more of them must occur" makes it seem as though "fill fill" is  
> valid, but I agree that that's not what we want here.
> 
> How about adding something to clarify that options can only occur once in  
> the given set? E.g:
> 
> "A double bar (||) separates two or more options: one or more of them must  
> occur, in any order. Each option can occur at most one time."

Can you post this request to www-style please?

Greetings,
Dirk


> 
> 
> -- 
> Erik Dahlstrom, Core Technology Developer, Opera Software
> Co-Chair, W3C SVG Working Group
> Personal blog: http://my.opera.com/macdev_ed
Received on Monday, 7 January 2013 15:04:54 GMT

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