<!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>
    <style>
    iframe {
        width: 800px;
        height: 1000px;
    }
    </style>
</head>
<body>
<script>

var iframeTarget;
var pageScrollPositionBefore;
var iFrameScrollPositionBefore;
var continueCount = 5;

function checkForScroll() {

    // The IFrame should not have scrolled at all.
    var pageScrollPositionAfter = document.scrollingElement.scrollTop;
    var iFrameScrollPositionAfter = window.frames['scrollable_iframe'].document.scrollingElement.scrollTop;

    if (iFrameScrollPositionBefore != iFrameScrollPositionAfter)
        testPassed("iframe did scroll.");
    else
        testFailed("iframe did NOT scroll.");

    testRunner.notifyDone();
}

function scrollTest() {
    // See where our IFrame lives:
    pageScrollPositionBefore = document.scrollingElement.scrollTop;

    iframeTarget = document.getElementById('scrollable_iframe');

    var iFrameScrollingElement = window.frames['scrollable_iframe'].document.scrollingElement;
    iFrameScrollingElement.scrollTop = iFrameScrollingElement.scrollHeight - iframeTarget.clientHeight - 100;

    iFrameScrollPositionBefore = iFrameScrollingElement.scrollTop;

    // Scroll the #source until we reach the #target.
    var startPosX = iframeTarget.offsetLeft + 20;
    debug("IFrame display height = " + iframeTarget.clientHeight);
    var startPosY = iframeTarget.offsetTop + 60; // One wheel turn before end.
    eventSender.mouseMoveTo(startPosX, startPosY); // Make sure we are just outside the iFrame
    debug("Mouse moved to (" + startPosX + ", " + startPosY + ")");
    eventSender.mouseScrollByWithWheelAndMomentumPhases(0, -1, 'began', 'none', true);
    eventSender.mouseScrollByWithWheelAndMomentumPhases(0, -1, 'changed', 'none', true);
    eventSender.mouseScrollByWithWheelAndMomentumPhases(0, -1, 'changed', 'none', true);
    eventSender.mouseScrollByWithWheelAndMomentumPhases(0, 0, 'ended', 'none', true);
    eventSender.mouseScrollByWithWheelAndMomentumPhases(0, -1, 'none', 'begin', true);
    eventSender.mouseScrollByWithWheelAndMomentumPhases(0, -1, 'none', 'continue', true);
    eventSender.mouseScrollByWithWheelAndMomentumPhases(0, 0, 'none', 'end', true);
    setTimeout(checkForScroll, 100);
}

function setupTopLevel() {

    if (window.eventSender) {
        testRunner.waitUntilDone();

        setTimeout(scrollTest, 1000);
    } 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>
    <iframe id="scrollable_iframe" name="scrollable_iframe" src="resources/scroll_nested_iframe_test_outer.html" onload="setupTopLevel();">
    </iframe>
</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>