MapCSS: add support for spatial expressions

[simon04]

A good support for a spatial "element of" expression could supersede the BuildingInBuilding test and allow mappers to write specific validators (see #9414, #9311).

[simon04]

In 6607/josm:

see #9516 - MapCSS: add basic support for a "contains" expression

The current syntax is outer ∋ inner, e.g., way[building?] ∋ node[building?].

This implementation is known to be inefficient since, for every match on the right side, it checks all primitives of the dataset for a match.

Nevertheless, this implementation allows mappers to write specific MapCSS-based tests involving this spatial operator.

[simon04]

In 6609/josm:

see #9516 - MapCSS: greatly improve performance of spatial "element of" (was: "contains") expression

The current syntax is inner ∈ outer.

The order plus symbol has been changed since now the left side is matched in the end.

[Don-vip]

The building in building test never really worked, so that's an excellent idea :-)

[mkoniecz]

Is it possible to change this symbol to something that will not require copy-pasting from list of special symbols? Maybe simple "in" or "element of" would be better?

[simon04]

In 6611/josm:

see #9516 - Replace BuildingInBuilding by a corresponding MapCSS test

[simon04]

Replying to Don-vip:

The building in building test never really worked, so that's an excellent idea :-)

Good that the isPolygonInsideMultiPolygon code is taken from the BuildingInBuilding test ;-))

[simon04]

In 6613/josm:

see #9516 - MapCSS: add support for crossing polygon check (area ⧉ area), replace OverlappingAreas test by a corresponding MapCSS test

[Don-vip]

Replying to simon04:

Good that the isPolygonInsideMultiPolygon code is taken from the BuildingInBuilding test ;-))

Hem :) Maybe we could take a look to "building in building" false positive tickets, then. I can only find #9361 right now but I was pretty sure there was another, older ticket with several non-working examples.

[simon04]

#8873 was another issue, which fixed itself in the course of migration to MapCSS. :-)

For now, I got all spatial operations into MapCSS that I wanted.