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Re: animate-elem-46-t.svg

From: Daniel Holbert <dholbert@mozilla.com>
Date: Mon, 07 Jun 2010 13:32:54 -0700
Message-ID: <4C0D5776.5090901@mozilla.com>
To: Chris Lilley <chris@w3.org>
CC: Robert Longson <longsonr@gmail.com>, www-svg@w3.org, Jeff Schiller <codedread@gmail.com>
On 06/07/2010 04:48 AM, Chris Lilley wrote:
 > RL>  and the
 > RL>  default value for attributeType is "auto" which means use CSS if
 > RL>  possible.
CL> Not quite accurate either.
[...]
CL> So 'auto' here means 'is there is a property of that name, use it'.

Right, I think that's basically what Robert said/meant. :)

CL> There is indeed a property called 'font-size' so that is what is
CL> being animated;

Agreed so far...

CL> and it is being animated with legal values for that
CL> property.

I don't think that's correct. "30" and "12" are *not* legal values for 
that property.

Those values would be legal for the font-size *presentational attribute* 
(which would be selected if attributeType="XML" were added).  But 
they're not legal for the font-size *CSS property*.  As Boris mentioned 
earlier in this thread, CSS properties require units for all nonzero 
<length>s (including font-size values).

Note that http://www.w3.org/TR/SVG11/animate.html says attributeType 
"specifies the namespace in which the target attribute and its 
associated values are defined".  In this case, attributeType="auto" 
makes us choose the CSS namespace (as you described above), and within 
that namespace, "30" and "12" are not valid values for 'font-size'.

 > RL>  Can the three animations of font-size in the test be changed so 
that either
 > RL>  a) they specify attributeType="XML"
 >
CL> That doesn't do what you seem to think it does.

I don't understand your response here -- can you elaborate?  IIUC, that 
change would indeed fix the test (or, at worst, leave the rendering 
unchanged, in browsers that accept unitless values for [effectively] 
attributeType="CSS" animations)

~Daniel
Received on Monday, 7 June 2010 20:34:00 GMT

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