[Webkit-unassigned] [Bug 90508] New: [Shadow] Events fired on distributed nodes should not be stopped at shadow boundary of the parent shadow host.

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=90508

           Summary: [Shadow] Events fired on distributed nodes should not
                    be stopped at shadow boundary of the parent shadow
                    host.
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Event Handling
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: hayato at chromium.org
                CC: dglazkov at chromium.org, dominicc at chromium.org,
                    morrita at google.com, shinyak at chromium.org,
                    tasak at google.com
            Blocks: 59805


Suppose the following DOM tree:

  <div id='host'>
    [shadow-root]
       <content></content>
    <div id='distributed-node'></div>
  </div>

Then, an event of 'selectstart', which is one of the events which mut always be stopped at the nearest shadow boundary [*1], is dispatched on #distributed-node. Let's assume it is bubbling up.

In that case, #host should receive the event. But the event is wrongly stopped at the shadow boundary of #host. #host won't receive the event.

*1) spec https://dvcs.w3.org/hg/webcomponents/raw-file/tip/spec/shadow/index.html#events-that-are-always-stopped), i

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