[css-fonts] <font> links incorrectly

[annevk]

In https://drafts.csswg.org/css-fonts-4/#absolute-size-mapping links to SVG rather than HTML.

Discovered while working on whatwg/html#4695.

[tabatkins]

Hm, that's because Bikeshed only sees that definition.

Looking in the HTML spec, it looks like all of the "legacy" elements are marked up as plain dfn, with no additional markup. Those'll all need data-dfn-type=element to expose them to Bikeshed properly.

[plinss]

Shepherd's spec parser has a heuristic to mark all the element dfns in the HTML as elements without the data-dfn-type (they all have anchors matching the pattern 'the-<name>-element'). I think the issue here is that HTML doesn't define the font element any more...

[tabatkins]

It does (https://html.spec.whatwg.org/multipage/obsolete.html#font), it's just off in a different section and doesn't have any of the indicators of being an element dfn.

[annevk]

Okay, I'll create a PR and you can review it to see if it fits the bill.

[annevk]

whatwg/html#4701

[svgeesus]

(also I guess it links to the font element in SVG 1.1 because font was removed in SVG2.)

[plinss]

Ok, bikeshed now sees the font element in HTML, but is still linking to SVG here. Bikeshed is producing the warning:

LINK ERROR: Multiple possible 'font' element refs.
Arbitrarily chose https://www.w3.org/TR/SVG11/fonts.html#FontElement
To auto-select one of the following refs, insert one of these lines into a <pre class=link-defaults> block:
spec:html; type:element; text:font
spec:svg; type:element; text:font
<{font}>