[Webkit-unassigned] [Bug 32641] New: The selected property of <option> elements is not always up to date

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=32641

           Summary: The selected property of <option> elements is not
                    always up to date
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: New Bugs
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: jamesr at chromium.org


The 'selected' property of an <option> inside of a <select> is updated by
SelectElement::recalcListItems().  This is called on certain property accesses
of the <select> (like selectedIndex) but when the form is created by normal
document parsing then it is only called as a side effect of recalcStyle() - see
https://bugs.webkit.org/show_bug.cgi?id=15088.

The test that 'selected' is up to date
(fast/forms/HTMLOptionElement_selected.html) passes currently because the test
code runs in a 'load' event handler, which dispatches after the
'DOMContentLoaded' event.  Node::dispatchGenericEvent() makes a call to
Document::updateStyleForAllDocuments() so the 'selected' property of the
<option> element is up to date by the time the test code runs.  If the property
is queried before or during the DOMContentLoaded event dispatch, or if the call
to Document::updateStyleForAllDocuments() in Node::dispatchGenericEvent() is
removed (see https://bugs.webkit.org/show_bug.cgi?id=32580) then this test
fails.

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