Idea: sowa1980
Coding: Alexander-II

meta{
  title: "Building Levels Labels";
  author: "sowa1980, Alexander-II";
  version: "1.[[revision]]_[[date]]";
  description: "Explicitly shows such tags as roof:levels, building:levels, building:levels:underground, building:min_level in the center of building/building part.";
}

meta[lang=ru] {
  title: "Отображение этажей зданий";
  description: "Выводит значение значение тегов roof:levels, building:levels, building:levels:underground, building:min_level в центре полигона здания/части";
}

/* Building */
area[building][roof:levels]::t {
  text: eval(concat("roof:levels = ", tag("roof:levels")));
  text-color: #357c23;
  font-size: 10;
  text-offset-y: 45;
  text-position: center;
  text-halo-radius: 1.5;
  text-halo-color: white;
}

area[building][building:levels]::tt {
  text: eval(concat("building:levels = ", tag("building:levels")));
  text-color: #357c23;
  font-size: 10;
  text-offset-y: 34;
  text-position: center;
  text-halo-radius: 1.5;
  text-halo-color: white;
}

area[building][building:levels:underground]::ttt {
  text: eval(concat("building:levels:underground = ", tag("building:levels:underground")));
  text-color: #357c23;
  font-size: 10;
  text-offset-y: 23;
  text-position: center;
  text-halo-radius: 1.5;
  text-halo-color: white;
}

area[building][building:min_level]::tttt {
  text: eval(concat("building:min_level = ", tag("building:min_level")));
  text-color: #357c23;
  font-size: 10;
  text-offset-y: 12;
  text-position: center;
  text-halo-radius: 1.5;
  text-halo-color: white;
}

/* Building Part */
area[building:part][roof:levels]::t {
  text: eval(concat("roof:levels = ", tag("roof:levels")));
  text-color: #1d82df;
  font-size: 10;
  text-offset-y: -12;
  text-position: center;
  text-halo-radius: 1.5;
  text-halo-color: white;
}

area[building:part][building:levels]::tt {
  text: eval(concat("building:levels = ", tag("building:levels")));
  text-color: #1d82df;
  font-size: 10;
  text-offset-y: -23;
  text-position: center;
  text-halo-radius: 1.5;
  text-halo-color: white;
}

area[building:part][building:levels:underground]::ttt {
  text: eval(concat("building:levels:underground = ", tag("building:levels:underground")));
  text-color: #1d82df;
  font-size: 10;
  text-offset-y: -34;
  text-position: center;
  text-halo-radius: 1.5;
  text-halo-color: white;
}

area[building:part][building:min_level]::tttt {
  text: eval(concat("building:min_level = ", tag("building:min_level")));
  text-color: #1d82df;
  font-size: 10;
  text-offset-y: -45;
  text-position: center;
  text-halo-radius: 1.5;
  text-halo-color: white;
}