[Webkit-unassigned] [Bug 116925] New: A focused element should lose focus when it becomes unfocusable

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=116925

           Summary: A focused element should lose focus when it becomes
                    unfocusable
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Keywords: BlinkMergeCandidate
          Severity: Normal
          Priority: P2
         Component: HTML DOM
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: rniwa at webkit.org
                CC: darin at apple.com, ap at webkit.org, tkent at chromium.org,
                    benjamin at webkit.org


Consider merging https://chromium.googlesource.com/chromium/blink/+/c58f636fd18fc27944c42e27d6a92a36867c57e1

According to the specification, we should remove focus when a focused element
becomes unforcusable, and Internet Explorer follows it.

We check focusable state after layout asynchronously because setFocusedNode(0)
dispatches synchronous events and callers of Document::updateLayout don't expect
DOM state changes. Also, we introduce m_didPostCheckFocusedNodeTask flag to avoid
duplicated tasks in the pending task queue.

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