Consider using HTML parser to parse SVG

• Component: SVG
• Status: RESOLVED WONTFIX

[Ryosuke Niwa]

https://chromium.googlesource.com/chromium/blink/+/b69618018614278cda72077611adc093f460dc57
Parse SVG as HTML

This change switches the SVG parser to be the HTML parser all the time. This
work is being done behind a flag to gauge the potential compat risk.

This is an interesting experiment.

[Dirk Schulze]

The experiment kind of failed.

HTML parser does not allow entities. There are thousands of SVGs out there which use custom XML entities. (Most exported by Illustrator :(.)

Either the HTML parser allows a legacy mode with entities or we can not proceed with this idea.

[Philip Rogers]

(In reply to comment #1)
> The experiment kind of failed.
> 
> HTML parser does not allow entities. There are thousands of SVGs out there which use custom XML entities. (Most exported by Illustrator :(.)
> 
> Either the HTML parser allows a legacy mode with entities or we can not proceed with this idea.

I discussed this with Kouhei and we don't think a basic level of xml entity support would be too hard to implement in the html parser.

[Dirk Schulze]

(In reply to comment #2)
> (In reply to comment #1)
> > The experiment kind of failed.
> > 
> > HTML parser does not allow entities. There are thousands of SVGs out there which use custom XML entities. (Most exported by Illustrator :(.)
> > 
> > Either the HTML parser allows a legacy mode with entities or we can not proceed with this idea.
> 
> I discussed this with Kouhei and we don't think a basic level of xml entity support would be too hard to implement in the html parser.

Does the HTML parser handle renaming of ns shorthands?

Instead of 
    xmlns:xlink="http://www.w3.org/1999/xlink"

this
    xmlns:l="http://www.w3.org/1999/xlink" and l:href

This was another pattern we saw.

[Ryosuke Niwa]

As far as I know, this experiment failed due to XSLT use.