W3C home > Mailing lists > Public > www-svg@w3.org > June 2000

CSSValue creation

From: Steve Dickson <sdickson@savagesoftware.com>
Date: Mon, 05 Jun 2000 13:41:30 -0700
Message-id: <fc.0085846d000078d70085846d000078d7.7923@savagesoftware.com>
To: www-svg@w3.org

I'd like some clarification about the use of CSSValue types in Exchange
SVG.  According to section
24.5 of the SVG spec of 2000/03/03, Exchange SVG defines a number of
attributes of type
CSSValue. e.g. 
		attribute CSSValue fill-opacity;  
Since this is not a read-only attribute, it should have a mutator/set
method as well as an
accessor/get method.  The set method presumably takes a user-created
CSSValue as an
input parameter.  

My question is: how is the user supposed to create a CSSValue object to
pass in to the set
method?  From what I've been able to determine from reading the CSS spec,
there are no factory
methods for CSSValue.  It seems that the only way to get a handle on a
CSSValue object is to do
something like the following:

[Assuming you have a DOMImplementationCSS variable created called "impl".]
CSSStyleSheet s = impl.createCSSStyleSheet("","");
s.insertRule("{fill-opacity: 1.0}");
CSSStyleRule sr = (CSSStyleRule)s.getCSSRules().item(0);
CSSValue fill_opacity = sr.getStyle().getPropertyCSSValue("fill-opacity");

I must be missing something, since this doesn't seem viable in the context
of Exchange SVG for two 
reasons: (1) one of the main purposes of Exchange SVG was to get away from
the need for style 
sheets;  (2) it seems to place an awful burden on the user just to create
a simple object. 

Is there a better (simpler, more lightweight, user-friendly) way to create
a CSSValue object for use
in Exchange SVG?


Received on Monday, 5 June 2000 16:41:25 UTC

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