[webkit-dev] Constructors for DOM4 Events

[Maciej Stachowiak]

+1 on the feature addition.

Please use a feature define so vendors can decide to ship the new functionality at a time of their choosing.

Cheers,
Maciej

On Jan 10, 2013, at 6:36 AM, Kentaro Hara <haraken at chromium.org> wrote:

> 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
>>> 
>>> _______________________________________________
>>> webkit-dev mailing list
>>> webkit-dev at lists.webkit.org
>>> http://lists.webkit.org/mailman/listinfo/webkit-dev
>> 
>> 
>> 
>> --
>> Kentaro Hara, Tokyo, Japan (http://haraken.info)
> 
> 
> 
> -- 
> Kentaro Hara, Tokyo, Japan