Re: Org 9.5 broke the rendering of my SVG images

[Chris Clark <cfclrk@gmail.com>]

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Would the HTML <svg> tag be appropriate in this case?

For example, here's a tiny example of using the <svg> tag with an external
CSS stylesheet: https://plnkr.co/edit/i8RFDW?preview


On Fri, Oct 14, 2022 at 4:32 AM Ihor Radchenko <yantar92@gmail.com> wrote:

> Alexandre Duret-Lutz <adl@lrde.epita.fr> writes:
>
> > In Org 9.5, SVG images started being exported by the HTML exporter as
> > <img> rather than <object>.
> >
> > The patch causing that was
> >   https://list.orgmode.org/87k0pemj6d.fsf@gmail.com/T/
> > with two arguments:
> > 1) <object> do not have an alt attribute
> > 2) <object> will not render some SVG file correctly if it has no viewBox
> >    (I'm assuming that the issue shown in that message is a missing
> viewBox).
> >
> > The reason I've noticed this change is that it broke my web pages.  On
> > my pages, I use SVG to display many automata, and they all share a
> > common stylesheet.  That stylesheet is not inlined into the SVG, rather,
> > it is a separate file included in the SVG files with
> >   <?xml-stylesheet href="filename.css" type="text/css"?>
> > so that the browser only need to download it once.
> >
> > Infortunately, <img> does not allow external stylesheets to be
> > processed, so my stylesheets are now ignored.  Note that one can also
> > build SVG images that include other SVG images, or SVG images that have
> > animations that start when you hover on some elements.  All those
> > usages would break with <img>.
> >
> > I've seen that very issue was discussed back in 2016
> > https://list.orgmode.org/871t2iq353.fsf@iki.fi/T/
> > where Christian Moe pointed out exactly this:
> >
> >> (2) You can also do other things with <object> that you cannot with
> >> <img>, like manipulating the SVG with Javascript and styling it with
> >> an external stylesheet (linked from the SVG, not the web page).
> >
> > So in the interest of allowing users to build documents where SVG
> > files are not static, self-contained images, it seems to me that Org
> > probably needs some way to specify whether SVG images should be
> > exported as <img> or <object> (or maybe even inlined).
>
> Confirmed.
> This is clearly a regression and should be fixed.
>
> --
> Ihor Radchenko // yantar92,
> Org mode contributor,
> Learn more about Org mode at <https://orgmode.org/>.
> Support Org development at <https://liberapay.com/org-mode>,
> or support my work at <https://liberapay.com/yantar92>
>
>

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