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Re: Shared workers - use .source instead of .ports[0] ?

From: Ian Hickson <ian@hixie.ch>
Date: Wed, 11 Apr 2012 17:41:43 +0000 (UTC)
To: Simon Pieters <simonp@opera.com>, Jarred Nicholls <jarred@webkit.org>, Andrew Wilson <atwilson@google.com>, Jonas Sicking <jonas@sicking.cc>, David Levin <levin@google.com>, Travis Leithead <travis.leithead@microsoft.com>
cc: public-webapps@w3.org
Message-ID: <Pine.LNX.4.64.1204111732280.22654@ps20323.dreamhostps.com>

I'm fine with making changes here. The following proposals seem to make 
the most sense, though I'm sure others could work too:

 1. Leave it as is.

 2. Make the .source attribute be of type (MessagePort or WindowProxy)? 
    and add the port to .source, also leaving it in .ports[0].

 3. Make the .source attribute be of type (MessagePort or WindowProxy)? 
    and add the port to .source, making .ports null.

 4. Set the .data attribute to the port, leaving it also in .ports[0].

 5. Set the .data attribute to the port, making .ports null.

 6. Use a new event object instead of MessageEvent.

For back-compat, 1, 2, or 4 seem best.

For similarity with posting things to other windows, 2 or 3 seem best. 
However, I think the similarity is a bit shallow in practice.

For similarity with how messages are handled elsewhere in Workers and when 
using MessagePorts in general, 1 and 4 seem best.

For cleanliness of code, any of 2-6 seem best.

For consistency acros codebases on the Web, 1, 3, 5, or 6 seem best.

If you count each of these considerations as being of equal importance, 
then options 1, 2, 3, and 4 all come out equally good.

Right now the only actual implementation argues for 1, I believe.

I think if I were designing the API from the ground up today I would do 
either 3 or 6. I think with back-compat concerns I would probably 
compromise by going for 2.

Best way to convince me is to ship what you want. :-)

Ian Hickson               U+1047E                )\._.,--....,'``.    fL
http://ln.hixie.ch/       U+263A                /,   _.. \   _\  ;`._ ,.
Things that are impossible just take longer.   `._.-(,_..'--(,_..'`-.;.'
Received on Wednesday, 11 April 2012 17:42:08 UTC

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