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Re: Widget instances and widget invocations

From: Marcos Caceres <marcosc@opera.com>
Date: Fri, 1 May 2009 18:06:36 +0200
Message-ID: <b21a10670905010906q5bcd76b3oe64250894ca58431@mail.gmail.com>
To: Scott Wilson <scott.bradley.wilson@gmail.com>
Cc: Robin Berjon <robin@berjon.com>, public-webapps WG <public-webapps@w3.org>
On Fri, May 1, 2009 at 11:36 AM, Scott Wilson
<scott.bradley.wilson@gmail.com> wrote:
> Hi Robin,
> I think you're missing a scenario, which is where your multiple instances
> are for different users. In which case "A" is the only viable option. "C"
> would mean that User A gets User B's preferences for their widget.
> I imagine for most if not every UA that invoking a widget involves
> instantiating a containing object  which has a persistent local identifier,
> so the issue you raise on the "A" option is a non-issue for existing UAs.
> Note that the issue largely arises because of this "Kill widget" behaviour
> which is not one which is defined in the specification:


> - If you try this out now in Apple Dashboard, for example, you'll find that
> "Kill Widget" (i.e. remove from dashboard) also deletes all information
> associated with the instance, so the issue would not arise.


> - In our implementation (Wookie), if you delete an instance from the page
> (i.e. remove a widget block from a user profile page in a social app), then
> add another instance of the same widget, the original preferences have been
> removed in the same manner as in the Apple Dashboard example, as each widget
> block is a unique context as far as the web application and Wookie are
> concerned. However, if you just close down the browser window, and then
> reopen the same page in a new browser window, then the server supplies the
> persisted instance ids on re-rendering the page, so instances retain the
> same preferences keyed on their original context.

Right. The above is what I would expect as the appropriate behavior
for widget instances.

Marcos Caceres
Received on Friday, 1 May 2009 16:07:36 UTC

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