Bug 186266 – Improve window.event compliance: Should not be set when target is in shadow tree

• Component: DOM
• Status: RESOLVED FIXED

[Anne van Kesteren]

See https://github.com/whatwg/dom/issues/334 for the discussion that led to this, https://github.com/whatwg/dom/pull/407 for the DOM Standard change, and https://github.com/web-platform-tests/wpt/pull/4790 & https://github.com/web-platform-tests/wpt/pull/10329/files for tests that Safari fails.

[Chris Dumez]

Created attachment 344229 [details]
Patch

[Ryosuke Niwa]

Comment on attachment 344229 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=344229&action=review

> Source/WebCore/bindings/js/JSEventListener.cpp:163
> +        if (!isTargetInsideShadowTree)

It probably doesn't matter but maybe we should also avoid calling setCurrentEvent later when we restore the saved event to maintain the symmetry?

[Chris Dumez]

Comment on attachment 344229 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=344229&action=review

>> Source/WebCore/bindings/js/JSEventListener.cpp:163
>> +        if (!isTargetInsideShadowTree)
> 
> It probably doesn't matter but maybe we should also avoid calling setCurrentEvent later when we restore the saved event to maintain the symmetry?

I prefer it this way for a couple of reasons:
- Trying to avoid the setting / restore adds a little bit of code complexity / branching
- Setting the event is cheap
- The current behavior matches the spec exactly (https://dom.spec.whatwg.org/#concept-event-listener-inner-invoke)

I am not opposed to doing it if you feel strongly about it though.

[EWS Watchlist]

Comment on attachment 344229 [details]
Patch

Attachment 344229 [details] did not pass mac-wk2-ews (mac-wk2):
Output: https://webkit-queues.webkit.org/results/8429641

New failing tests:
accessibility/smart-invert-reference.html

[EWS Watchlist]

Created attachment 344240 [details]
Archive of layout-test-results from ews107 for mac-sierra-wk2

The attached test failures were seen while running run-webkit-tests on the mac-wk2-ews.
Bot: ews107  Port: mac-sierra-wk2  Platform: Mac OS X 10.12.6

[Chris Dumez]

Comment on attachment 344240 [details]
Archive of layout-test-results from ews107 for mac-sierra-wk2

Failure does not look related

[WebKit Commit Bot]

Comment on attachment 344229 [details]
Patch

Clearing flags on attachment: 344229

Committed r233489: <https://trac.webkit.org/changeset/233489>

[WebKit Commit Bot]

All reviewed patches have been landed.  Closing bug.

[Radar WebKit Bug Importer]

<rdar://problem/41799255>