- From: Jonas Sicking <jonas@sicking.cc>
- Date: Tue, 20 Apr 2010 16:22:55 -0700
- To: Jian Li <jianli@chromium.org>
- Cc: Web Applications Working Group WG <public-webapps@w3.org>
On Tue, Apr 20, 2010 at 3:51 PM, Jian Li <jianli@chromium.org> wrote:
> According to the spec, we will dispatch a progress event for a read method.
> But per the "Progress Events 1.0" spec, the attributes "loaded" and "total"
> are defined as "unsigned long".
> interface ProgressEvent : events::Event {
> ...
> readonly attribute unsigned long loaded;
> readonly attribute unsigned long total;
> ...
> The type "unsigned long" is not enough to represent the file size. Do we
> want to update the Progress Event spec to use "unsigned long long"? Or we
> could limit the FileReader to only read from the file with size less than
> MAX_UINT.
I think the progress events spec needs to be amended here yes. Though
one complication is that ECMAScript can't represent all values of a
unsigned long long.
Ideally webidl would define an integer type with 53 bits (which iirc
is the largest size you can precisely represent in an ECMAScript
value).
/ Jonas
Received on Tuesday, 20 April 2010 23:23:48 UTC