<!DOCTYPE html> <!-- webkit-test-runner [ internal:AsyncOverflowScrollingEnabled=true ] -->
<html>
<head>
    <title>Test scrolling tree stucture with various positioning and clipping configurations</title>
    <style>
        .scroller {
            margin: 10px;
            background-color: silver;
            border: 1px solid black;
            padding: 10px;
            width: 200px;
            height: 150px;
            overflow: scroll;
        }
        
        .stacking-containing {
            position: relative;
            z-index: 0;
        }

        .stacking {
            opacity: 0.75;
        }
        
        .box {
            width: 100px;
            height: 100px;
            background-color: blue;
        }

        .absolute {
            position: absolute;
            left: 100px;
        }
        
        .composited {
            transform: translateZ(0);
            background-color: orange;
        }

        .scrolling-content {
            height: 1000px;
        }
    </style>
    <script>
        if (window.testRunner)
            testRunner.dumpAsText();

        function doTest() {
            if (window.internals)
                document.getElementById('scrollingTree').innerText = window.internals.scrollingStateTreeAsText() + "\n";
        }

        window.addEventListener('load', doTest, false);
    </script>
</head>
<body>
    <div class="scroller">
        <div class="scrolling-content">
            Scrolling content
            <div class="absolute box"></div>
            <div class="composited box"></div>
        </div>
    </div>

    <div class="scroller">
        <div class="scrolling-content">
            Scrolling content
            <div class="scroller">
                <div class="scrolling-content">
                    Scrolling content
                    <div class="absolute box"></div>
                </div>
            </div>
        </div>
    </div>

    <div class="scroller stacking-containing">
        <div class="scrolling-content">
            Scrolling content
            <div class="absolute box"></div>
            <div class="composited box"></div>
        </div>
    </div>

    <div class="scroller stacking">
        <div class="scrolling-content">
            Scrolling content
            <div class="absolute box"></div>
            <div class="composited box"></div>
        </div>
    </div>

    <pre id="scrollingTree"></pre>
</body>
</html>