<!DOCTYPE html>
<html>
<head>
<link rel="help" href="http://www.w3.org/TR/DOM-Level-3-Events/#events-WheelEvent">
<script src="../../../resources/js-test-pre.js"></script>
</head>
<body>
<script>

var divTarget;
var pageScrollPositionBefore;
var divScrollPositionBefore;

function locationInWindowCoordinates(element)
{
    var position = {};
    position.x = element.offsetLeft;
    position.y = element.offsetTop;

    while (element.offsetParent) {
        position.x = position.x + element.offsetParent.offsetLeft;
        position.y = position.y + element.offsetParent.offsetTop;
        if (element == document.getElementsByTagName("body")[0])
            break;

        element = element.offsetParent;
    }

    return position;
}

function finishTest()
{
    finishJSTest();
    testRunner.notifyDone();            
}

function checkForScroll()
{
    var pageScrollPositionAfter = document.scrollingElement.scrollTop;
    var divScrollPositionAfter = divTarget.scrollTop;

    if (divScrollPositionBefore != divScrollPositionAfter)
        testPassed("div did scroll.");
    else
        testFailed("div did NOT scroll.");

    if (pageScrollPositionBefore == pageScrollPositionAfter)
        testPassed("Page did NOT scroll.");
    else
        testFailed("Page DID scroll.");

    finishTest();
}

function scrollTest()
{
    pageScrollPositionBefore = document.scrollingElement.scrollTop;

    divTarget = document.getElementById('scrollable_div');

    var windowPosition = locationInWindowCoordinates(divTarget);

    var startPosX = windowPosition.x + 0.5 * divTarget.clientWidth;
    var startPosY = windowPosition.y + 0.5 * divTarget.clientHeight;

    divScrollPositionBefore = divTarget.scrollTop;

    eventSender.mouseMoveTo(startPosX, startPosY);
    eventSender.mouseScrollByWithWheelAndMomentumPhases(0, -1, 'began', 'none');
    eventSender.mouseScrollByWithWheelAndMomentumPhases(0, -1, 'changed', 'none');
    eventSender.mouseScrollByWithWheelAndMomentumPhases(0, -1, 'changed', 'none');
    eventSender.mouseScrollByWithWheelAndMomentumPhases(0, 0, 'ended', 'none');
    eventSender.mouseScrollByWithWheelAndMomentumPhases(0, -1, 'none', 'begin');
    eventSender.mouseScrollByWithWheelAndMomentumPhases(0, -1, 'none', 'continue');
    eventSender.mouseScrollByWithWheelAndMomentumPhases(0, 0, 'none', 'end');
    eventSender.callAfterScrollingCompletes(checkForScroll);
}

function setupTopLevel()
{
    if (window.eventSender) {
        jsTestIsAsync = true;
        testRunner.waitUntilDone();

        eventSender.monitorWheelEvents();
        setTimeout(scrollTest, 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/>"
            + "inside the IFrame, then use the mouse wheel or a two-finger swipe to scroll the IFrame to the bottom (and beyond).<br/>"
            + "<br/><br/>"
            + "The test passes if you scroll far enough to see the row of END labels but the main page does not scroll.</p>";
        messageLocation.appendChild(message);
    }
}

</script>
<div id="parent" style="height: 2000px">
    <div id="source" style="height: 20px">
        Put mouse inside the iframe (below) and flick downwards
    </div>
    <div id="scrollable_div" style="height: 400px; width: 430px; overflow-y:auto; padding: 0;">
        <iframe id="non_scrollable_iframe" src="resources/background.html" style="height: 2100px; width:410px; overflow:hidden; scrolling: no" onload="setupTopLevel();">
        </iframe>
    </div>
</div>
<div id="console"></div>
<script>
description("Tests that iframe does scroll when inner iframe is NOT scrollable.");
</script>
<script src="../../../resources/js-test-post.js"></script>
</body>
</html>