Federico Mena Quintero

I agree! One thing I really want to do is to make La Mapería use libchamplain to download/cache tiles, instead of talking to tile providers directly.

FWIW, in librsvg I ended up with this: ```rust pub trait CssParserExt { fn expect_finite_number(&mut self) -> Result; } impl CssParserExt for Parser { fn expect_finite_number(&mut self) -> Result {...

I guess the question is, should encountering a non-finite number just yield an UnexpectedToken error? I don't know the details of the CSS spec well enough :)

[Section 5.1 says](https://drafts.csswg.org/css-values/#numeric-ranges): > If the value is outside the allowed range, then unless otherwise specified, the declaration is invalid and must be ignored. So, "too large" -> "parse error"...