<!DOCTYPE html>

<html>
<head>
    <style>
        body {
            width: 2000px;
            height: 3000px;
        }
        .box {
            height: 100px;
            width: 100px;
            background-color: blue;
            pointer-events: none;
        }
        #client {
            position: fixed;
            background-color: red;
            width: 28px;
            height: 28px;
        }
        #clientrects {
            position: absolute;
            background-color: green;
            width: 25px;
            height: 25px;
        }
        #clientscroll {
            position: absolute;
            background-color: orange;
            width: 22px;
            height: 22px;
        }
        #page {
            position: absolute;
            background-color: blue;
            width: 16px;
            height: 16px;
        }
    </style>
    <script src="../../resources/ui-helper.js"></script>
    <script>
        if (window.testRunner)
            testRunner.waitUntilDone();

        if (window.internals)
            internals.settings.setVisualViewportEnabled(true);

        function getUIScript()
        {
            return `(function() {
                uiController.zoomToScale(2, function() {
                    uiController.uiScriptComplete();
                });
            })();`;
        }
        
        function doAfterZooming()
        {
            window.scrollTo(120, 123);
            eventSender.mouseMoveTo(345, 234);
            eventSender.mouseDown();
            eventSender.mouseUp();
        }
        
        function doTest()
        {
            document.addEventListener('click', clickHandler);

            if (!window.testRunner)
                return;

            testRunner.runUIScript(getUIScript(), function(zoomScale) {
                doAfterZooming();
            });
        }
        
        function clickHandler(event)
        {
            document.getElementById('click-location').textContent = 'clicked at ' + event.clientX + ', ' + event.clientY;
            var clientBox = document.getElementById('client');
            var clientRect = clientBox.getBoundingClientRect();
            clientBox.style.left = (event.clientX - clientRect.width / 2) + 'px';
            clientBox.style.top = (event.clientY - clientRect.height / 2) + 'px';

            var clientRectsBox = document.getElementById('clientrects');
            clientRect = clientRectsBox.getBoundingClientRect();
            var pageViewport = document.documentElement.getClientRects()[0];
            clientRectsBox.style.left = (event.clientX - clientRect.width / 2) - pageViewport.left + 'px';
            clientRectsBox.style.top = (event.clientY - clientRect.height / 2) - pageViewport.top + 'px';

            var clientScrollBox = document.getElementById('clientscroll');
            clientRect = clientScrollBox.getBoundingClientRect();
            var pageViewport = document.documentElement.getBoundingClientRect();
            clientRect = clientScrollBox.getBoundingClientRect();
            clientScrollBox.style.left = (event.clientX - clientRect.width / 2) - pageViewport.left + 'px';
            clientScrollBox.style.top = (event.clientY - clientRect.height / 2) - pageViewport.top + 'px';

            var pageBox = document.getElementById('page');
            clientRect = pageBox.getBoundingClientRect();
            pageBox.style.left = (event.clientX - clientRect.width / 2) + 'px';
            pageBox.style.top = (event.clientY - clientRect.height / 2) + 'px';
            
            if (window.testRunner)
                testRunner.notifyDone();
        }
        
        window.addEventListener('load', doTest, false);
    </script>
</head>
<body>
    <div id="client" class="box"></div>
    <div id="clientrects" class="box"></div>
    <div id="clientscroll" class="box"></div>
    <div id="page" class="box"></div>
    <p>Got click at <span id="click-location"></span></p>
</body>
</html>