[Patch] Multipolygon - Extended functionality

[Gubaer]

JOSM currenly supports the following features regarding multipolygons:

• a member with role outer or with no role at all is considered to be part of a "outer" polygon
• a member with role inner is considered to be part of an "inner" polygon

This patch doesn't change the default behaviour, but it makes the "outer" and "inner"-roles configurable in the preferences. There are four new preference keys:

• mappaint.multipolygon.outer.roles
  preference key for a collection of roles which indicate that the respective member belongs to an outer polygon. Default is outer.

• mappaint.multipolygon.outer.role-prefixes
  preference key for collection of role prefixes which indicate that the respective member belongs to an outer polygon. Default is empty.

• mappaint.multipolygon.inner.roles
  preference key for a collection of roles which indicate that the respective member belongs to an inner polygon. Default is inner

• mappaint.multipolygon.inner.role-prefixes
  preference key for collection of role prefixes which indicate that the respective member belongs to an inner polygon. Default is empty.

The functionality is required in an in-house project managing in-house geodata.

[Gubaer]

Patch

[bastiK]

In [4004/josm]:

applied #6149 - Multipolygon - Extended functionality (patch by Gubaer)