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Re: [Vibration] Proposed update and next steps

From: Mounir Lamouri <mounir@lamouri.fr>
Date: Fri, 06 Jun 2014 19:46:17 +1000
Message-Id: <1402047977.20784.125861405.5C13F13C@webmail.messagingengine.com>
To: frederick.hirsch@nokia.com, public-device-apis@w3.org
On Fri, 6 Jun 2014, at 0:10, frederick.hirsch@nokia.com wrote:
> We’ve had some discussion on the list regarding the Vibration API and
> alignment of implementations.
> The only item of concern at this point appears to be step #5 [1]:
> “5. If the length of pattern is even and is not zero, then remove the
> last entry in pattern."
> Anssi provided an example to highlight the issue, as well as a pointer to
> chromium code [2]
> To reiterate, if the pattern is even, then the last item is a pause,
> which should have no effect since there is no vibrate time following. In
> addition, as Mounir points out, a subsequent API invocation will cancel
> the previous one so the pause should have no effect. it is generally
> agreed that this step is not testable.
> Thus I propose the following change:
> [[
> Remove step 5.
> In its place add a Note “Note: if the length of the pattern is even and
> not zero then the last entry in the pattern will have no effect so an
> implementation can remove it from the pattern.”
> ]]
> I suggest we stay away from RFC normative language for step 5 (e.g. MAY)
> given the testability concern.
> Given we are changing normative language, I suggest we have another Last
> Call (currently Vibration is in LC), and publish this along with the
> other LC specifications (after a CfC)
> Am I missing any other implementation alignment concerns?
> Please comment on list, otherwise can the editors go ahead and update the
> editors draft so we can see this in place (along with an update to the
> status section)?

The change sounds good to me. Hopefully, Firefox Android and Chrome
Android will both pass the test suite now and we will be able to move
forward. Exciting! :)

-- Mounir
Received on Friday, 6 June 2014 09:46:49 UTC

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