<!DOCTYPE html>
<html>
<head>
<script src="../../resources/js-test-pre.js" type="text/javascript"></script>
<style>
    #parent {
        background-color: #eee;
    }
    #target {
        background-color: silver;
    }
</style>
<script>
    window.jsTestIsAsync = true;

    var pageScrollPositionBefore;
    var pageScrollHeightBefore;
    var continueCount = 5;

    function checkForScrollOffset()
    {
        var pageScrollPositionAfter = document.scrollingElement.scrollTop;
        var pageScrollHeightAfter = document.scrollingElement.scrollHeight;

        if (pageScrollPositionAfter + 100 >= pageScrollPositionBefore)
            testFailed("Page did not properly handle rubber banding state.");
        else
            testPassed("Page properly handled rubber banding state.");

        finishJSTest();
    }

    var zoomOutCount = 0;
    function zoomPageOut()
    {
        if (!zoomOutCount) {
            pageScrollPositionBefore = document.scrollingElement.scrollTop;
            pageScrollHeightBefore = document.scrollingElement.scrollHeight;
        }

        eventSender.zoomPageOut();
        zoomOutCount = zoomOutCount + 1;
        if (zoomOutCount >= 2)
            setTimeout(checkForScrollOffset, 100);
        else
            setTimeout(zoomPageOut, 100);
    }

    function scrollDown()
    {
        // Scroll the #source until we reach the #target.
        var selectTarget = document.getElementById('target');
        var startPosX = Math.round(selectTarget.offsetLeft) + 20;
        var startPosY = Math.round(selectTarget.offsetTop) - 42; // Slightly more than one wheel scroll away from the target div
        eventSender.mouseMoveTo(startPosX, startPosY); // Make sure we are just outside the target div
        eventSender.mouseScrollByWithWheelAndMomentumPhases(0, -1, 'began', 'none');
        for (var i = 0; i < 40; ++i) {
            eventSender.mouseScrollByWithWheelAndMomentumPhases(0, -10, 'changed', 'none');
        }
        eventSender.mouseScrollByWithWheelAndMomentumPhases(0, 0, 'ended', 'none');
         
        setTimeout(zoomPageOut, 700);
    }

    var zoomInCount = 0;
    function zoomPageIn()
    {
        eventSender.zoomPageIn();
        zoomInCount = zoomInCount + 1;
        if (zoomInCount >= 2)
            setTimeout(scrollDown, 100);
        else
            setTimeout(zoomPageIn, 100);
    }

    function startTest()
    {
        if (window.eventSender) {
            setTimeout(zoomPageIn, 0);
        } else {
            var messageLocation = document.getElementById('parent');
            var message = document.createElement('div');
            message.innerHTML = "<p>This test is better run under DumpRenderTree. To manually test it, place the mouse pointer<br/>"
                + "at the top of the page, perform two text zooms, scroll to the bottom of the page, then zoom back out.<br/>"
            + "The bottom of the test page should not be offset from the bottom of the web view.<\/p>";
            messageLocation.appendChild(message);
        }
    }

    window.addEventListener('load', startTest, false);        
</script>
</head>
<body>
    <div id="parent" style="height: 2000px;">
        <div id="source" style="height: 100px">
            Put mouse here and do the following:
            <ol>
                <li>Perform two text zooms (in). (Command+ in Safari)</li>
                <li>Scroll down to the bottom. Be sure to scroll far enough that a rubberband animation is triggered.</li>
                <li>Perform two text zooms (out).  (Commmand- in Safari)</li>
            </ol>
        </div>
        <div id="target" style="height: 1000px; position: relative">
        </div>
    </div>
    <div id="console"></div><script type="text/javascript">
        description("Tests that scroll dimensions return to correct size after rubber banding while zoomed.");
    </script>
    <div id="bottom">This should be at the very bottom of the page.</div>
    <script src="../../resources/js-test-post.js" type="text/javascript"></script>
</body>
</html>