- From: Andrew Wilson <atwilson@google.com>
- Date: Tue, 10 Apr 2012 13:28:05 -0700
- To: Jonas Sicking <jonas@sicking.cc>
- Cc: Simon Pieters <simonp@opera.com>, Jarred Nicholls <jarred@webkit.org>, "public-webapps@w3c.org" <public-webapps@w3c.org>
- Message-ID: <CAArhhivkiJxO9VeqHH=hEhiS5A3arM+a37iP4kxYAHyRLVefdA@mail.gmail.com>
On Tue, Apr 10, 2012 at 1:06 PM, Jonas Sicking <jonas@sicking.cc> wrote: > On Tue, Apr 10, 2012 at 10:47 AM, Andrew Wilson <atwilson@google.com> > wrote: > > To follow up on Jonas' earlier comment, the postMessage/MessageEvent APIs > > changed to support object transfers after we defined the connect event > > structure, so it's not unreasonable that we should take another look at > the > > connect event to try to make it match the current definition of > > postMessage(). > > > > I think the model of connect event we've used in the past > > (pre-structure-clone-transfer) is as if the creator of the SharedWorker > were > > sending a message like so: > > > > postMessage("", [newPort]); > > > > The recipient then receives a MessageEvent with data="" and > ports=[newPort]. > > > > In the new world where postMessage() supports a transfer object, I think > the > > appropriate analogous connect event would be to result in a MessageEvent > > with both the |data| and |ports| attributes pointing at an array > containing > > a single MessagePort. I don't think putting the MessagePort as the source > > attribute is the right model. > > Why make .data be an array containing a single MessagePort? Why not > just make .data be the MessagePort object itself? > That's fine with me as well. To be honest, I haven't been closely following the Transferable discussion, so I wasn't certain what the semantics of the |data| and |transfer| attributes were ( http://www.whatwg.org/specs/web-apps/current-work/multipage/web-messaging.html#messageport). If it's valid to just have |data| point directly at a Transferable rather than a-map-containing-Transferables then that's fine by me. > > The .ports property is basically a relic of the time before we had > Transferrable objects. Even if we all end up implementing it, I think > we should let authors ignore it once they don't care about down-level > browsers. > > / Jonas >
Received on Tuesday, 10 April 2012 20:28:35 UTC