<!DOCTYPE html>
<html>
<head>
    <script src="../../../resources/js-test-pre.js"></script>
    <script>
        jsTestIsAsync = true;

        var iframeTarget;
        var pageScrollPositionBefore;
        var iframeScrollPositionBefore;

        function checkForScroll()
        {
            // The iframe should not have scrolled at all.
            var pageScrollPositionAfter = document.scrollingElement.scrollTop;
            var iframeScrollPositionAfter = window.frames['target'].document.scrollingElement.scrollTop;

            if (pageScrollPositionBefore != pageScrollPositionAfter)
                testFailed("Page received wheel events.");
            else
                testPassed("Page did not receive wheel events.");

            finishJSTest();
        }

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

            iframeTarget = document.getElementById('target');

            var iframeScrollingElement = window.frames['target'].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 + iframeTarget.clientHeight - 42; // One wheel turn before end.

            eventSender.monitorWheelEvents();
            eventSender.mouseMoveTo(startPosX, startPosY); // Make sure we are just outside the iFrame

            debug("Mouse moved to (" + 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() 
        {
            description("Tests that iframe doesn't pass wheel events to main frame when scrolling at bottom");
            if (window.eventSender) {
                setTimeout(scrollTest, 0);
                return;
            }
            
            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);
            finishJSTest();
        }
        
    </script>

</head>
<body>
<div id="parent" style="height: 2000px">
    <div id="source" style="height: 100px">
        Put mouse here and flick downwards
    </div>
    <iframe id="target" name="target" style="border:solid 1px green; height: 500px; width: 500px;" 
     src= "data:text/html,
     <div style='height: 1000px; width: 1000px;'>
     TOP TOP TOP TOP TOP TOP TOP TOP TOP TOP TOP TOP TOP TOP<br/><br/>
     This should still be visible inside the frame after you scroll down
     <br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/>
     <br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/>
     <br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/>
     This should NOT be visible inside the frame after you scroll down<br/>
     <br/>
     END END END END END END END END END END END END END
     </div>
     "
     onload="setupTopLevel();"
     >
    </iframe>
</div>
<div id="console"></div>
<script src="../../../resources/js-test-post.js"></script>
</body>
</html>