Unexpect behavior for referencing external packages

[rocco8773]

Over at plasmapy we're trying to configure sphinx-hoverxref for our package (PlasmaPy/PlasmaPy#1437). In our documentation we liberally use intersphinx so we can provide link backs for our users. In setting up hoverxref I've noticed it doesn't provide tooltips for all valid sphinx syntax. For example, for all the following syntax intersphinx/sphinx will generate the proper links, but hoverxref will only work with the last set. For this I do have default_role = "obj".

.. no tooltip generated
`astropy.units.Quantity`
`~astropy.units.Quantity`
`Quantity <astropy.units.Quantity>`

.. tooltip generated
:class:`astropy.units.Quantity`
:class:`~astropy.units.Quantity`
:class:`Quantity <astropy.units.Quantity>`
:py:class:`Quantity <astropy.units.Quantity>`

Is this designed behavior? My expectation is that, if intersphinx can find the link, then hoverxref should be able to as well.

[humitos]

Thanks for opening this issue.

I think I've never tested this use case. So, I wouldn't say it's an intended behavior ☺️

I'll create a sample project to reproduce it when using a default role and check if it's possible to implement it.

[rocco8773]

That would be great! Thank you.