Re: Work around unsupported baseline-shift

On 07/31/2013 11:45 AM, Wulf Berschin wrote:
> Hi batik cracks,
>
> as far I found out the CSS property baseline-shift is neither supported
> by IE 9.0 nor yet by Firefox. Unfortunately I'm now not only exposed
> these exotic (behaving) SVG renderers but mathematical formulas with
> lots of superscripts and subscripts on the SVG side as well.
>
> I'm now considering to create a small converter which transforms
> "baseline-shift" CSS attributes into "dy" attributes. With some efforts
> I could solve this in XML, but since I am lazy and eager to use Batik
> I'd prefer some higher level API to use.
>
> Could someone please light me the way how to do this with Batik?
> Is my impression correct that I will need to use the GVT API?

I am not giving you a complete solution because I don't know GVT 
internals, but I have used the Batik CSS engine for other kind of 
document type (forms for line printer based documents, think ESC/P, 
ESC/POS, Proprinter languages, etc) and I was already using Batik so the 
internal CSS engine was available and I avoided another CSS engine 
dependency.

You can try to extend the Batik CSSEngine implementations like 
SVGCSSEngine and SVG12CSSEngine and add some new ValueManagers. I think 
you should check what other ValueManagers do to their work on the document.

In my case, as it was an entirely new CSSEngine implementation for my 
document type, I don't know how to interact with the GVT tree form it 
because I was doing my drawing outside SVG

>
> Thank you!
>
> Wulf
>
>
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