[Mapcss] Potlatch 2 stylesheet changes

[Paul Hartmann]

Richard Fairhurst wrote:
> The next version of Potlatch 2 will have a couple of major changes to 
> the MapCSS parser that you need to know about if you're writing custom 
> stylesheets. These are to bring it in line with other software that 
> understands MapCSS.
> 
> The changes are:
> 
> 1. casing-width is now relative to the stroke width.
>     OLD: { width: 5; casing-width; 7; }
>     NEW: { width: 5; casing-width: 1; }
> 
> 2. Separate strokes for the same way (or whatever) should now be given 
> distinct 'subpart' names, rather than relying on z-index to separate 
> them. Subparts are defined by appending '::name' to the selector.
>     OLD:
>         way[highway=primary] { color: red; width: 5; z-index: 2}
>         relation[type=route] way { color: blue; width: 7; z-index: 1}
>     NEW:   
>         way[highway=primary] { color: red; width: 5; z-index: 2}
>         relation[type=route] way::routehighlight { color: blue; width: 
> 7; z-index: 1}
> 
> The code for this is in my refactor branch on github 
> (https://github.com/systemed/potlatch2/tree/refactor) should you want to 
> try it out. Before it goes live I'll make the changes to the bundled 
> styles; the Potlatch style is already mostly adapted.

Great to see things moving for Halcyon! The next item on my personal wish list:

OLD: way[landuse=residential] :area {}
NEW: area[landuse=residential] {}

Cheers, Paul