<html>
<head>
    <script src="../../resources/js-test-pre.js"></script>
    <style>
        #scrolloffsetcontainer {
            position: absolute;
            top: 500px;
            height: 1000px;
        }
        body {
            margin: 0px;
        }
    </style>
</head>
<body onload="runTests()">

<div id=scrolloffsetcontainer>
    <iframe frameborder='0px' src='data:text/html,
        <html>
        <head>
            <style>
                #div0 { position: absolute; left: 50px; top: 50px; width: 300px; height: 300px; box-sizing: border-box; }
                #div1 { position: absolute; left: 50px; top: 50px; width: 200px; height: 100px; box-sizing: border-box; }
            </style>
        </head>
        <body>
            <div id=div0>
                <div id=div1></div>
            </div>
        </body>
        </html>'>
    </iframe>
    <p id='description'></p>
    <div id='console'></div>
</div>

<script>
    function testRoundTouch(x, y, radius)
    {
        var x = x - radius;
        var y = y - radius;
        var width = radius * 2;
        var height = radius * 2;
        var zoomableRect = internals.bestZoomableAreaForTouchPoint(x, y, width, height);
        return zoomableRect;
    }

    function testDirectTouches()
    {
        zoomableArea = testRoundTouch(100, 600, 10);
        shouldEvaluateTo('zoomableArea.top', 600);
        shouldEvaluateTo('zoomableArea.left', 100);
        shouldEvaluateTo('zoomableArea.width', 200);
        shouldEvaluateTo('zoomableArea.height', 100);
    }

    function runTests()
    {
        if (window.testRunner && window.internals && internals.touchNodeAdjustedToBestClickableNode && internals.setDelegatesScrolling) {
            description('Test iframe with main frame scroll offset case of tap-to-zoom mechanics.');
            window.scrollBy(0,500);
            internals.setDelegatesScrolling(true);
            testRunner.dumpAsText();
            testRunner.waitUntilDone();
            testDirectTouches();
            isSuccessfullyParsed();
            testRunner.notifyDone();
        }
    }
</script>
</body>
</html>