<!DOCTYPE html>
<html>
    <head>
        <script src="../../resources/js-test-pre.js" type="text/javascript"></script>
    </head>
    <body>
        <script type="text/javascript">
            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.");

                testRunner.notifyDone();
            }

            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) {
                    testRunner.dumpAsText();
                    testRunner.waitUntilDone();

                    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>
        <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 style="position: absolute; top: 0">TOP TOP TOP TOP TOP TOP TOP TOP TOP TOP TOP TOP TOP TOP</div>
               <div style="position: absolute; bottom: 0">END END END END END END END END END END END END END</div>
            </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>