Make Attr.value/nodeValue/textContent not nullable

[Ahmad Saleem]

Hi Team,

While going through Blink's commit, I noted another bug where we differ from other browsers:

Test Case - http://software.hixie.ch/utilities/js/live-dom-viewer/?saved=3528

Blink Commit - https://chromium.googlesource.com/chromium/blink/+/a7c3bb9f22401c30e906a3ec53595247e707de83

*** Safari 16.2 / STP 159 ***

log: attr.value=null => getAttribute()=="null"
log: attr.nodeValue=null => getAttribute()==null
log: attr.textContent=null => getAttribute()==null
rendering mode: CSS1Compat
document has no title


*** Chrome Canary 110 & Firefox Nightly 110 ***

log: attr.value=null => getAttribute()=="null"

log: attr.nodeValue=null => getAttribute()==""

log: attr.textContent=null => getAttribute()==""

rendering mode: CSS1Compat

document has no title


_____

Just wanted to raise it for future purposes.

Thanks!

[Ryosuke Niwa]

It seems like a good change to merge.

[Ahmad Saleem]

(In reply to Ryosuke Niwa from comment #1)
> It seems like a good change to merge.

Cool! I will give it a go later today. Thanks for your input! I usually don't touch IDL files (fear of unknown). :-)

[Radar WebKit Bug Importer]

<rdar://problem/103602803>

[Ahmad Saleem]

void Attr::setNodeValue(const String& value)
{
    const AtomString valueWithoutNull = value.isNull() ? emptyAtom() : AtomString(value);
    setValue(valueWithoutNull);
}

^ This fixes failing test case locally. Can do PR later. Thanks!

[EWS]

Committed 265769@main (2da4c96001cf): <https://commits.webkit.org/265769@main>

Reviewed commits have been landed. Closing PR #15550 and removing active labels.