More powerful custom legend entries

[SolidTux]

Currently, add-legend only supports a custom preview function. It would be nice to be able to use the available marks more easily. I got around it by adding this manually, but it seems a bit verbose:

(
  (
    type: "legend-item",
    label: name,
    style: (stroke: none),
    mark: mark,
    mark-size: 0.2,
    mark-style: (fill: black.lighten(75%), stroke: black),
    axes: ("x", "y"),
    data: (),
    preview: auto,
  ),
)

[johannes-wolf]

So you want to be able to give all the styling keys you can give to add(...) to add-legend(...)?

[SolidTux]

That would be ideal, yes.