Resolve with the class used to define the Custom Element

[Andrea Giammarchi]

Accordingly with https://github.com/whatwg/html/issues/5552, `whenDefined` should resolve with the class used to define the custom element in the registry.

[Radar WebKit Bug Importer]

<rdar://problem/67282709>

[Ryosuke Niwa]

Created attachment 406998 [details]
Implements the new behavior

[EWS Watchlist]

This patch modifies the imported WPT tests. Please ensure that any changes on the tests (not coming from a WPT import) are exported to WPT. Please see https://trac.webkit.org/wiki/WPTExportProcess

[Darin Adler]

Comment on attachment 406998 [details]
Implements the new behavior

View in context: https://bugs.webkit.org/attachment.cgi?id=406998&action=review

> Source/WebCore/bindings/js/JSDOMPromiseDeferred.h:80
> +        JSC::JSGlobalObject* lexicalGlobalObject = globalObject();

auto

> Source/WebCore/dom/CustomElementRegistry.cpp:81
>      if (auto promise = m_promiseMap.take(localName))
> -        promise.value()->resolve();
> +        return WTFMove(*promise);
> +    return nullptr;

No if statement needed:

    return m_promiseMap.take(localName);

[Ryosuke Niwa]

(In reply to Darin Adler from comment #4)
> Comment on attachment 406998 [details]
> Implements the new behavior
> 
> View in context:
> https://bugs.webkit.org/attachment.cgi?id=406998&action=review
>
> > Source/WebCore/dom/CustomElementRegistry.cpp:81
> >      if (auto promise = m_promiseMap.take(localName))
> > -        promise.value()->resolve();
> > +        return WTFMove(*promise);
> > +    return nullptr;
> 
> No if statement needed:
> 
>     return m_promiseMap.take(localName);

That's what I thought but I was getting (and still getting) this error:

./dom/CustomElementRegistry.cpp:79:12: error: no viable conversion from returned value of type 'WTF::HashMap<WTF::AtomString, WTF::Ref<WebCore::DeferredPromise, WTF::DumbPtrTraits<WebCore::DeferredPromise> >, WTF::DefaultHash<WTF::AtomString>, WTF::HashTraits<WTF::AtomString>, WTF::HashTraits<WTF::Ref<WebCore::DeferredPromise, WTF::DumbPtrTraits<WebCore::DeferredPromise> > > >::MappedTakeType' (aka 'Optional<Ref<WebCore::DeferredPromise> >') to function return type 'RefPtr<WebCore::DeferredPromise>'
    return m_promiseMap.take(localName);
           ^~~~~~~~~~~~~~~~~~~~~~~~~~~~

[Darin Adler]

I see. You’ll have to write it this way for now, but we should either change RefHashTraits::TakeType to RefPtr in HashTraits.h, or add a constructor for RefPtr that takes Optional<Ref>&& in RefPtr.h, or possibly do both. Then we can come back here and re-simplify this.

[Ryosuke Niwa]

Created attachment 407227 [details]
Patch for landing

[Ryosuke Niwa]

(In reply to Darin Adler from comment #6)
> I see. You’ll have to write it this way for now, but we should either change
> RefHashTraits::TakeType to RefPtr in HashTraits.h, or add a constructor for
> RefPtr that takes Optional<Ref>&& in RefPtr.h, or possibly do both. Then we
> can come back here and re-simplify this.

Yeah, let me work on that next.

[EWS]

Committed r266142: <https://trac.webkit.org/changeset/266142>

All reviewed patches have been landed. Closing bug and clearing flags on attachment 407227 [details].