[Webkit-unassigned] [Bug 158629] Focus event dispatched in iframe causes parent document to scroll incorrectly

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=158629

Simon Fraser (smfr) <simon.fraser at apple.com> changed:

           What    |Removed                     |Added
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                 CC|                            |simon.fraser at apple.com

--- Comment #1 from Simon Fraser (smfr) <simon.fraser at apple.com> ---
We do have code that tries to suppress scrolling:

#if PLATFORM(IOS)
    // Focusing a form element triggers animation in UIKit to scroll to the right position.
    // Calling updateFocusAppearance() would generate an unnecessary call to ScrollView::setScrollPosition(),
    // which would jump us around during this animation. See <rdar://problem/6699741>.
    FrameView* view = document().view();
    bool isFormControl = view && is<HTMLFormControlElement>(*this);
    if (isFormControl)
        view->setProhibitsScrolling(true);
#endif
    updateFocusAppearance(restorePreviousSelection ? SelectionRestorationMode::Restore : SelectionRestorationMode::SetDefault);
#if PLATFORM(IOS)
    if (isFormControl)
        view->setProhibitsScrolling(false);
#endif

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