On Fri, Jul 17, 2009 at 11:30:12AM +0300, Marko Mäkelä wrote:
> There will be a combinatorial explosion if there is no way to write
> this kind of rules:
>
> name += ref
> name += operator
I thought that it would be nice to translate shelter=yes and shelter=no
as well, by appending a '+' or '-' to the name. This could be useful
when you are bicycling or walking, and you are looking for the nearest
shelter to have a break or to escape from a rain shower.
To avoid messy rules, I tried to introduce two auxiliary variables,
name_ref and name_ref_op:
name=* & ref=* { set name_ref='${name} (${ref})' }
name=* & ref!=* { set name_ref='${name}' }
ref=* & name!=* { set name_ref='${ref}' }
name_ref=* & operator=* { set name_ref_op='${name_ref} - ${operator}' }
name_ref=* & operator!=* { set name_ref_op='${name_ref}' }
operator=* & name_ref!=* { set name_ref_op='${operator}' }
No matter if I use 'set' or 'add', the action { name '${name_ref_op}' }
will be ignored. Any ideas?
While working on this, I mistyped =!* instead of !=*, and the style parser
threw an exception.
The ugly patch (which does not use any auxiliary variables) is attached.
Marko
Index: resources/styles/default/points
===================================================================
--- resources/styles/default/points (revision 1106)
+++ resources/styles/default/points (working copy)
@@ -85,7 +85,10 @@
amenity=university [0x2c05 resolution 21]
amenity=zoo [0x2c07 resolution 21]
-highway=bus_stop [0x2f08 resolution 21]
+(highway=bus_stop | railway=tram_stop | railway=halt | railway=station) & shelter=yes { name '${name} ${ref} - ${operator}+' | '${name} ${ref}+' | '${name} - ${operator}+' | '${ref} ${operator}+' | '${name}+' | '${ref}+' | '${operator}+' }
+(highway=bus_stop | railway=tram_stop | railway=halt | railway=station) & shelter=no { name '${name} ${ref} - ${operator}-' | '${name} ${ref}-' | '${name} - ${operator}-' | '${ref} ${operator}-' | '${name}-' | '${ref}-' | '${operator}-' }
+highway=bus_stop | railway=tram_stop | railway=halt | railway=station { name '${name} ${ref} - ${operator}' | '${name} ${ref}' | '${name} - ${operator}' | '${ref} ${operator}' | '${name}' | '${ref}' | '${operator}' }
+highway=bus_stop [0x2f17 resolution 20]
highway=motorway_junction { name '${ref} ${name}' | '${ref}' | '${name}' }
highway=motorway_junction [0x2000 resolution 16]
@@ -133,7 +136,7 @@
railway=halt [0x2f08 resolution 21]
railway=station [0x2f08 resolution 20]
-railway=tram_stop [0x2f08 resolution 21]
+railway=tram_stop [0x2f17 resolution 21]
shop=bakers [0x2e02 resolution 20]
shop=bakery [0x2e02 resolution 20]
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