[josm-dev] Can I style by user in mappaint?

[Ulf Lamping]

Am 15.01.2010 09:05, schrieb Jiri Klement:
> I think it would be nice to use search patterns in mappaint. The style
> information is cached in OsmPrimitive so it shouldn't have impact on
> overall performance.  And there are probably other usecases when
> key=value matching is not sufficient.
>
> Actually I was planning to do some prototype to see if performance
> really isn't a problem

Might be a problem for initial reading of large datasets, but you cannot 
say wether it's acceptable or not until you've really tried it.

That's the conclusion I've got when doing the first round of mappaint 
performance improvements a lot of time ago :-)

> and then ask here if it is really a good idea
> to switch to search patterns. But when avar brought it up, we can
> start the discussion now. So are there any other usecases when search
> patterns would be usefull in mappaint or any objections agains search
> patterns?

Avar was the first one I've seen to come up with "show me stuff from 
user xy in a special way". I'm unsure if this is really a common use case.

Personally, I'd like to keep things simple here - so even none 
developers have at least a chance to write their own rendering rules.

Otherwise complexity grows and grows and ends up like the mapnik 
rendering rules with embedded SQL statements - the learning curve is now 
really high :-(


Today, elemstyles.xml format is pretty simple and I like it that way.

Regards, ULFL