[webkit-dev] Constructors for DOM4 Events

[Kentaro Hara]

At TPAC there was no objection for DOM4 Event constructors (e.g. new
MouseEvent()).

Now DOM4 Event constructors are on editor's draft:
http://html5labs.interoperabilitybridges.com/dom4events/
https://dvcs.w3.org/hg/d4e/raw-file/tip/source_respec.htm

Given the above, I am planning to implement them in WebKit (without
any flag). If you have any concern, please let me know.

Best Regards


On Mon, Oct 1, 2012 at 7:44 AM, Kentaro Hara <haraken at chromium.org> wrote:
>> Since TPAC is less than a month away, I don't understand why we can't wait for that discussion.
>
> Sounds reasonable. I'll wait for TPAC.
>
>> I do support the idea in general, and I plan to be at TPAC and will advocate for it.
>
> I'll be also going to TPAC. I would appreciate your support.
>
>
>
> On Mon, Oct 1, 2012 at 2:11 PM, Maciej Stachowiak <mjs at apple.com> wrote:
>>
>> Since TPAC is less than a month away, I don't understand why we can't wait for that discussion. I do support the idea in general, and I plan to be at TPAC and will advocate for it.
>>
>> I understand that sometimes we need to move ahead of the spec. If there's a reason not to wait a few extra weeks in this case, then please at least use a prefix.
>>
>> Cheers,
>> Maciej
>>
>> On Sep 30, 2012, at 6:32 PM, Kentaro Hara <haraken at chromium.org> wrote:
>>
>>> TL;DR: Would it be OK to implement constructors for DOM4 Events in
>>> WebKit without waiting for the spec?
>>>
>>>
>>> == Background ==
>>>
>>> Events should have constructors. 'new XXXEvent()' is much easier than
>>> 'e = document.createEvent(...); e.initXXXEvent(_a_lot_of_arguments_)'.
>>> We have already implemented constructors for a bunch of Events such as
>>> Event, CustomEvent, ProgressEvent, etc [5]. However, we have not yet
>>> implemented constructors for DOM4 Events (i.e. UIEvent, MouseEvent,
>>> KeyboardEvent, WheelEvent, TextEvent, CompositionEvent) because they
>>> are not yet speced.
>>>
>>> Recently PointerEvent was speced with [Constructor] [2]. Considering
>>> that PointerEvent inherits MouseEvent, now we want to support
>>> [Constructor] on MouseEvent
>>> too. In terms of implementation, it is possible to implement
>>> [Constructor] on PointerEvent without implementing [Constructor] on
>>> MouseEvent. However, implementing [Constructor] on both PointerEvent
>>> and MouseEvent would be best.
>>>
>>> == Rationale for implementing constructors for DOM4 Events ==
>>>
>>> I have been discussing this topic for one year, in www-dom@ [4] and a
>>> www.w3.org bug [3]. It looks like there is a consensus on introducing
>>> constructors for DOM4 Events. However, the spec is still a draft [1]
>>> and the www.w3.org bug [3] is marked as LATER. Last week I discussed
>>> the timeline of the spec with Jacob Rossi (a.k.a. a spec author of
>>> PointerEvent and DOM4 Events). According to him:
>>>
>>> - Their primary focus is on finishing DOM3 Events first.
>>> - With DOM3 Events in Candidate Recommendation, they are going to
>>> start working on the DOM4 Events. They will discuss it in TPAC.
>>> - They will introduce constructors to DOM4 Events.
>>>
>>> In summary, constructors for DOM4 Events are going to be speced, but
>>> it will take time. So I would like to implement them in WebKit a bit
>>> ahead of the spec (and thus implement PointerEvent constructors too).
>>> If you have any concern, please let me know.
>>>
>>>
>>> == References ==
>>> [1] The spec draft by Jacob Rossi:
>>> http://html5labs.interoperabilitybridges.com/dom4events/
>>>
>>> [2] The spec of Pointer Events:
>>> http://www.w3.org/Submission/pointer-events/
>>>
>>> [3] www.w3.org bug:
>>> https://www.w3.org/Bugs/Public/show_bug.cgi?id=14051
>>>
>>> [4] Discussion on www-dom@:
>>> http://lists.w3.org/Archives/Public/www-dom/2011OctDec/0081.html
>>> http://lists.w3.org/Archives/Public/www-dom/2012JanMar/0025.html
>>>
>>> [5] WebKit bug:
>>> https://bugs.webkit.org/show_bug.cgi?id=67824
>>>
>>>
>>> --
>>> Kentaro Hara, Tokyo, Japan (http://haraken.info)
>>> _______________________________________________
>>> webkit-dev mailing list
>>> webkit-dev at lists.webkit.org
>>> http://lists.webkit.org/mailman/listinfo/webkit-dev
>>
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>
>
>
> --
> Kentaro Hara, Tokyo, Japan (http://haraken.info)



-- 
Kentaro Hara, Tokyo, Japan