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Re: [widgets] test suite, the width/height attribute

From: Cyril Concolato <cyril.concolato@enst.fr>
Date: Tue, 15 Dec 2009 09:57:25 +0100
Message-ID: <4B274F75.3020905@enst.fr>
To: marcosc@opera.com
CC: public-webapps <public-webapps@w3.org>
Hi Marcos,

Le 14/12/2009 16:49, Marcos Caceres a écrit :
> On Fri, Dec 4, 2009 at 5:04 PM, Cyril Concolato<cyril.concolato@enst.fr>  wrote:
>> Dear Widgets-experts,
>>
>> While checking some of the tests, I found some unclear processing with
>> regards to the width and height attribute of widget element. The spec says:
>>
>> "If the width attribute is used, then let normalized width be the result of
>> applying the rule for parsing a non-negative integer to the value of the
>> attribute. If the normalized width is not in error  and greater than 0, then
>> let widget width be the value of normalized width. If the width attribute is
>> in error, then the user agent must ignore the attribute."
>>
>> It explicitely says "greater than 0" which means that 0 should not be
>> allowed, but the test suite says for c9.wgt that the result should be 0.
>
> Argh. Right.
>
>> This seems inconsistent. On top of that, the spec seems to make the
>> distinction between 'null' (when in error) and '0' (not specified). From an
>> implementation point of view, I would prefer two cases:
>> - specified, not in error, greater than 0, width = the specified value
>> - in error or not specified, width = null, empty or 0.
>> Actually, I would prefer 0 since then the attribute can be implemented as an
>> integer not as a string.
>>
>> What do you think ?
>
> Given that a number of UAs have implemented support for getting back
> the value "0", I think we should just say "greater than or equal to
> 0".
>
> So:
>
> <widget width/height="">  = Error. value remains null.
>
> <widget width/height="             ">  = Error, value remains null.
>
> <widget width/height="abc">  returns 0, value is 0.
>
> <widget width/height="100abc">  returns 100, value is 100.
>
> <widget width/height="000100abc">  returns 100, value is 100.
>
> However, I'm open to just saying return 0 upon error.
That's what I would prefer.

Cyril


-- 
Cyril Concolato
Maître de Conférences/Associate Professor
Groupe Mutimedia/Multimedia Group
Telecom ParisTech
46 rue Barrault
75 013 Paris, France
http://concolato.blog.telecom-paristech.fr/
Received on Tuesday, 15 December 2009 08:57:57 GMT

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