LayoutTests/pdf/pdf-in-iframe-scrolling-tree-after-back.html

<!DOCTYPE html> <!-- webkit-test-runner [ UnifiedPDFEnabled=true ] -->
<html>
<head>
    <style>
        iframe {
            width: 300px;
            height: 250px;
        }
    </style>
    <script src="../resources/ui-helper.js"></script>
    <script>
        if (window.testRunner) {
            testRunner.dumpAsText();
            testRunner.waitUntilDone();
        }

        async function doOnFirstLoad()
        {
            await UIHelper.renderingUpdate();

            let iframe = document.getElementsByTagName('iframe')[0];
            if (window.internals)
                document.getElementById('scrollingtree-before-navigate').innerText = internals.scrollingStateTreeAsText();

            iframe.contentWindow.location.href = 'resources/go-back.html';
        }

        let sawFirstLoad = false;
        function iframeLoaded(iframeLocation)
        {
            const path = iframeLocation.pathname;
            const filename = path.substring(path.lastIndexOf('/') + 1)

            if (filename === 'green_rectangle.pdf') {
                if (!sawFirstLoad) {
                    sawFirstLoad = true;
                    doOnFirstLoad();
                    return;
                }
                doAfterBack();
            }
        }

        async function doAfterBack()
        {
            await UIHelper.renderingUpdate();

            if (window.internals)
                document.getElementById('scrollingtree-after-back').innerText = internals.scrollingStateTreeAsText();

            if (window.testRunner)
                testRunner.notifyDone();
        }

    </script>
</head>
<body>
    <iframe onload="iframeLoaded(this.contentWindow.location)" src="../fast/images/resources/green_rectangle.pdf"></iframe>
    <p>Before navigation:</p>
    <pre id="scrollingtree-before-navigate"></pre>
    <p>After back:</p>
    <pre id="scrollingtree-after-back"></pre>
</body>
</html>