W3C home > Mailing lists > Public > www-style@w3.org > January 2011

Re: set <bg-size> in 'background' shorthand property, syntax of forward slash '/'

From: fantasai <fantasai.lists@inkedblade.net>
Date: Thu, 20 Jan 2011 11:40:46 -0800
Message-ID: <4D388FBE.8040904@inkedblade.net>
To: Brad Kemper <brad.kemper@gmail.com>
CC: "tao.yu@nokia.com> <tao.yu@nokia.com" <tao.yu@nokia.com>, www-style@w3.org
On 01/20/2011 09:30 AM, Brad Kemper wrote:
>
> On Jan 20, 2011, at 7:36 AM, <tao.yu@nokia.com <mailto:tao.yu@nokia.com>> <tao.yu@nokia.com <mailto:tao.yu@nokia.com>> wrote:
>
>> Hi,
>> I was looking at the CSS3 Backgrounds & Borders spec for ‘background’ shorthand property. The <bg-layer> syntax is:
>> <bg-layer> = <bg-image> || <bg-position> [/ <bg-size>]? || <repeat-style> || <attachment> || <box>{1,2}
>> My question here is: if <bg-size> is specified (via a forward slash ‘/’), should it follow a valid <bg-position> immediately?
>> Two examples (Example XV & XVI) in spec NOT set <bg-size> after <bg-position> immediately, like Example XVI:
>> E { background: #CCC top left url("metal.jpg") / 100% auto no-repeat}
>> Is this correct?
>> Thanks,
>> -Tao
>
> The <bg-position> is required if you specify <bg-size> in the shorthand. This was a big argument for a while, and was resolved
> in the April 2010 face-to-face meeting:
>
> fantasai: Disallow "/size position", definitely.
> fantasai: Allow "position url /size" and "/size url position"?
> fantasai: Or restrict it to *only* "position/size"?
> RESOLVED: Change background shorthand to have "<bg-position> [/ <bg-size>]".
> (Position is required if you specify size.)
>
> http://lists.w3.org/Archives/Public/www-style/2010Apr/0273.html
>
> So, based on all that, it looks like "position url /size" is not allowed, and the examples do need updating.

Examples updated. Please let me know if I missed any others:
   http://dev.w3.org/csswg/css3-background/

~fantasai
Received on Thursday, 20 January 2011 19:41:23 GMT

This archive was generated by hypermail 2.3.1 : Tuesday, 26 March 2013 17:20:36 GMT