[Webkit-unassigned] [Bug 79754] New: [Forms] Spin button sometimes ignores Indeterminate of m_upDownState

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=79754

           Summary: [Forms] Spin button sometimes ignores Indeterminate of
                    m_upDownState
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Forms
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: yosin at chromium.org


SpinButton implementation contains code like below:
  input->stepUpFromRenderer(m_upDownState == Up ? 1 : -1);

Member variable m_upDownState is type of enum UpDownState which has three values, Indeterminate, Down, and Up.
Above code can pass -1 to input->setUpFromRenderer if m_upDownState is Down or Indeterminate. We should not call input->setUpFromRenderer if m_upDownState is Indeterminate.

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