W3C home > Mailing lists > Public > www-svg@w3.org > May 2010

Re: SVG views in values lists

From: Jack Jansen <Jack.Jansen@cwi.nl>
Date: Thu, 6 May 2010 22:49:27 +0200
Cc: www-smil@w3.org, www-svg@w3.org
Message-Id: <772DAFBD-6EA9-4517-9003-044082B68EE2@cwi.nl>
To: "Dr. Olaf Hoffmann" <Dr.O.Hoffmann@gmx.de>
from the SMIL Animation side of the picture escaping can be done with percent-encoding.
But that leaves the question of when the SVG renderer will decode the percent escapes. The URI definition <http://tools.ietf.org/html/rfc3986#section-2.4> suggests that it is done after splitting the URL on delims and subdelims, so that would mean it would be too late.

In SMIL there may be a workaround using SMIL State, but I don't think that's allowed in SVG. And, indeed, in SMIL the href attribute isn't animatable (but it may contain SMIL State {attribute value template} constructs). But in SMIL you could also break open the values animation into a sequence of <set> animations.

On  6-May-2010, at 17:34 , Dr. Olaf Hoffmann wrote:

> Hello www-smil and www-svg,
> within SVG documents so called SVG views are possible, for example
> 'ex.svg#svgView(viewBox(0,0,200,200);preserveAspectRatio(none)))'
> (note the semicolon as separator...)
> see:
> http://www.w3.org/TR/SVG11/linking.html#SVGFragmentIdentifiers
> Such a construction can for example appear as a value of the href 
> attribute from XLink within an a or image element (and it can appear
> in similar constructions in the src attribute of SMIL media object 
> elements of course).
> This href attribute is indicated to be animatable in SVG (not sure, if
> the src attributes from media object elements in SMIL are animatable)
> Therefore such constructions can appear within animation 
> values lists as well:
> values=
> "
> e1.svg#svgView(viewBox(0,0,200,200);preserveAspectRatio(none));
> e2.svg#svgView(viewBox(100,100,100,100);viewTarget(ID));
> e1.svg#svgView(viewBox(-100,-100,400,400);zoomAndPan(disable));
> e3.svg#svgView(transform(skewX(-10));viewBox(0,0,200,200);transform(rotate(37,100,100)));
> e2.svg#svgView(viewTarget(ID))
> "
> I would like to know, whether this semicolon within the SVG view does create
> a conflict with the values list separator or not?
> I could not find any information about such a situation in SMIL 3 or SVG.
> Is it mentioned somewhere?
> If it conflicts, do authors have to mask such a semicolon within a list item
> of a values list?
> If yes - how?
> Olaf

Jack Jansen, <Jack.Jansen@cwi.nl>, http://www.cwi.nl/~jack
If I can't dance I don't want to be part of your revolution -- Emma Goldman
Received on Thursday, 6 May 2010 20:50:02 UTC

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