W3C home > Mailing lists > Public > public-geolocation@w3.org > February 2014

Re: CfC: approve Errata for Geo v1

From: Dominique Hazael-Massieux <dom@w3.org>
Date: Wed, 12 Feb 2014 15:58:34 +0100
Message-ID: <1392217114.20872.37.camel@cumulustier>
To: Michael van Ouwerkerk <mvanouwerkerk@google.com>
Cc: "public-geolocation@w3.org" <public-geolocation@w3.org>
On mer., 2014-02-12 at 11:38 +0000, Michael van Ouwerkerk wrote:

> I think the timeout member of PositionOptions should not have a
> default value. That way, it can be 'not present' to replace the
> previous use of Infinity as default.

Good catch, removed.

> 
> On re-reading, I noticed that for maximumAge the spec already
> specifies a default value of 0, so we actually cannot use the 'not
> present means Infinity' trick.
> 
Hmm… True.

> I'd suggest we cannot rephrase step 2 as I suggested earlier, so I
> withdraw that suggestion.

Removed.

>  However, in section 5.2 for the PositionOptions interface there is
> this sentence:
> "Setting the maximumAge to Infinity must determine the implementation
> to return a cached position regardless of its age."

> Since it is not possible according to WebIDL to set an integer type to
> Infinity, how about just deleting this sentence?

I have added that removal in the proposed errata.

>  Not sure how all browsers have implemented this. In Chrome, I can
> specify Infinity in js, and I get a cached position.

That means that at least Chrome is not bound by the "Infinity"
conversion to 0 that my reading of WebIDL imposes; we probably need to
check what other browsers do to understand what the right approach is,
and document it properly in the errata. I'll take a stab at it.

>  In practice, setting a large number is very likely to have the
> desired effect. Using the unsigned long type, a maximumAge of nearly
> 50 days can be specified. If [Clamp] is used, there should be no
> overflow surprises.

Right; but it remains that the spec says something, and at least one
implementation doesn't do it, so we need to figure how to align them and
document that alignment.

Dom


Received on Wednesday, 12 February 2014 14:58:50 UTC

This archive was generated by hypermail 2.4.0 : Friday, 17 January 2020 19:51:07 UTC