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<!DOCTYPE HTML>
<html>
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width">
  <title>Hittest position:fixed zoomed scroll</title>
  <script type="application/javascript" src="apz_test_utils.js"></script>
  <script type="application/javascript" src="apz_test_native_event_utils.js"></script>
  <script src="/tests/SimpleTest/paint_listener.js"></script>
  <style>
    html {
      position: fixed;
    }
    body {
      margin: 0;
    }
    #fixed {
      position: fixed;
      top: 100px;
      left: 100px;
    }
  </style>
</head>
<body>
  <div id="fixed"><input type="button" value="Button" /></div>
  <script>
    async function test() {
      // Create an offset between the visual and layout viewports.
      // The offset is 50 CSS pixels = 100 screen pixels at 2x zoom
      // in either direction.
      let transformEndPromise = promiseTransformEnd();
      await synthesizeNativeTouchDrag(document.body, 10, 10, -50, -50);
      await transformEndPromise;
      await promiseApzFlushedRepaints();
      let clickPromise = new Promise(resolve => {
        window.addEventListener("click", resolve);
      });
      let input = document.querySelector("input");
      // Provide the input in window-relative coordinates,
      // otherwise coordinatesRelativeToScreen() will run into the
      // same bug as the hit-test, and the two bugs cancel out.
      await synthesizeNativeMouseEventWithAPZ({
        type: "click",
        target: window,
        // The visual viewport is already offset (50, 50) CSS pixels
        // into the layout viewport. An additional (50, 50) CSS pixels
        // gives us (100, 100), the offset of #fixed, in total.
        offsetX: 55,
        offsetY: 55
      });
      let e = await clickPromise;
      is(e.target, input, "got click");
    }
    SpecialPowers.getDOMWindowUtils(window).setResolutionAndScaleTo(2.0);
    waitUntilApzStable().then(test).then(subtestDone, subtestFailed);
  </script>
</body>
</html>