Bug 166484 – Add the support for ShadowRoot.delegateFocus

• Component: DOM
• Status: RESOLVED FIXED

[Damiaan Dufaux]

Created attachment 297772 [details]
A web page to reproduce the problem

Overview: As specified in the shadow dom specification (http://w3c.github.io/webcomponents/spec/shadow/#focus): "A shadow host can delegate focus to its shadow root by assigning a boolean delegatesFocus flag to be true in ShadowRootInit dictionary". But this feature is not working.

Steps to Reproduce:
 - open the attached file (delegateFocus.html) in the latest nightly build
 - click on the text "Hello world"

Actual Results: nothing happens

Expected Results: The input field should receive focus.

Build date: December 20, 2016 5:14 PM GMT
Platform: macOS Sierra 10.12.2 (16C67)

[Radar WebKit Bug Importer]

<rdar://problem/29816058>

[Ryosuke Niwa]

Created attachment 376241 [details]
WIP

[EWS Watchlist]

Attachment 376241 [details] did not pass style-queue:


ERROR: Source/WebCore/dom/Element.cpp:2837:  'newTarget' is incorrectly named. It should be named 'protectedThis'.  [readability/naming/protected] [4]
Total errors found: 1 in 30 files


If any of these errors are false positives, please file a bug against check-webkit-style.

[Ryosuke Niwa]

Created attachment 380813 [details]
Adds the support

[Antti Koivisto]

Comment on attachment 380813 [details]
Adds the support

View in context: https://bugs.webkit.org/attachment.cgi?id=380813&action=review

> Source/WebCore/dom/ShadowRoot.cpp:59
> +ShadowRoot::ShadowRoot(Document& document, ShadowRootMode type, bool delegatesFocus)

Please use enum in the interface. The member can be bool.

> Source/WebCore/dom/ShadowRoot.h:45
> +    enum class FocusDelegation { Yes, No };

You even have one, you are just not using it!

[Ryosuke Niwa]

(In reply to Antti Koivisto from comment #5)
> Comment on attachment 380813 [details]
> Adds the support
> 
> View in context:
> https://bugs.webkit.org/attachment.cgi?id=380813&action=review
> 
> > Source/WebCore/dom/ShadowRoot.cpp:59
> > +ShadowRoot::ShadowRoot(Document& document, ShadowRootMode type, bool delegatesFocus)
> 
> Please use enum in the interface. The member can be bool.

Yeah, I guess I added enum after I had added this argument!

> 
> > Source/WebCore/dom/ShadowRoot.h:45
> > +    enum class FocusDelegation { Yes, No };
> 
> You even have one, you are just not using it!

Will do. I also forgot to specify the width again (uint8_t) :( Will fix that.

[Ryosuke Niwa]

Committed r251043: <https://trac.webkit.org/changeset/251043>

[Ryosuke Niwa]

Landed the windows build fix in https://trac.webkit.org/changeset/251044.

[Rakina Zata Amni]

FYI there's one new addition for the spec, to keep the focused element if it's a flat-tree descendant of the host: https://github.com/whatwg/html/pull/5039

[Ryosuke Niwa]

(In reply to Rakina Zata Amni from comment #9)
> FYI there's one new addition for the spec, to keep the focused element if
> it's a flat-tree descendant of the host:
> https://github.com/whatwg/html/pull/5039

This kind of already works in WebKit but fixing it fully in https://bugs.webkit.org/show_bug.cgi?id=203869.