[Webkit-unassigned] [Bug 105497] New: [EFL][WK2] Optimize zooming and scrolling/

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=105497

           Summary: [EFL][WK2] Optimize zooming and scrolling/
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: luxtella at company100.net


Qt can make fast scrolling and fast zooming. However, efl always make zooming and scrolling when receiving didRenderFrame mesage from Web Process. It makes big UI responsibility latency.
Refer to Bug 78602

In detail, PageViewportControllerClientQt calls movementStarted() and contentXChanged() if needed.

PageViewportControllerClientQt::PageViewportControllerClientQt(QQuickWebView* viewportItem, QQuickWebPage* pageItem)
    ...
{
    ...
    connect(m_viewportItem, SIGNAL(movementStarted()), SLOT(flickMoveStarted()), Qt::DirectConnection);
    connect(m_viewportItem, SIGNAL(movementEnded()), SLOT(flickMoveEnded()), Qt::DirectConnection);
    connect(m_viewportItem, SIGNAL(contentXChanged()), SLOT(pageItemPositionChanged()));
    connect(m_viewportItem, SIGNAL(contentYChanged()), SLOT(pageItemPositionChanged()));


    connect(m_scaleAnimation, SIGNAL(stateChanged(QAbstractAnimation::State, QAbstractAnimation::State)),
            SLOT(scaleAnimationStateChanged(QAbstractAnimation::State, QAbstractAnimation::State)));
}

I does not have enough knowledge of efl UI toolkit framework. It is good if someone fix this bug before I study efl framework :)

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