markers in linestyles

Hi there,

the linestyle mechanism of on-off inks is pretty flexible but still limited to
dash dot combinations. It would be a nice feature if you could simply use a
marker inside a linestyle instead of a dot for example. This would decouple
vertices and markers and add a completely new dimension to linestyles.

I have highly resolved, unregularly spaced data which look rather ugly using
markers or skipped markers at vertices.

Evaluating the complexity to implement this feature I got lost in the code
when it comes down to the backend stuff. Which object actually calculates the
arc lengths to draw the linestyles?

Could that feature be feasible in MPL?