[webkit-dev] Multiple inheritance in the DOM

[Adam Barth]

On Wed, Aug 1, 2012 at 9:45 AM, Andrei Bucur <abucur at adobe.com> wrote:
> On 7/27/12 1:55 AM, "Adam Barth" <abarth at webkit.org> wrote:
>>Perhaps it would make sense to start with a smaller CSSOM for Regions
>>that uses established patterns and techniques.  That way we can gain
>>experience with these patterns and techniques before jumping into API
>>designs that don't follow existing patterns and introduce complexity
>>across the entire platform.
>
> In the light of the recent discussions I think the best action to take is
> not to add the Region interface in WebKit at this moment. Instead of that,
> we should move the members from the Region interface to the Element
> interface and implement them there. The
> NamedFlow.getRegions()/getRegionsByContent() methods would then return a
> sequence of Elements.
>
> When other types of DOM/CSSOM objects will be able to become regions (such
> as pseudo-elements) we will take another look at implementing the
> supplemental interfaces mechanism.
>
> The downside with taking this path is the region sequences returned by the
> NamedFlow API functions will not contain the pseudo-elements that are
> regions. However, I think this is an issue we can live with :).
>
> Thoughts?

I think that's a wise course of action.  Nothing prevents us from
inventing the Regions interface in the future since nothing observable
will change in JavaScript.

Adam