<!DOCTYPE HTML>
<html>
<head>
<title>Test for Bug 1778486</title>
<script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
<script src="chrome://mochikit/content/tests/SimpleTest/EventUtils.js"></script>
<script src="chrome://mochikit/content/tests/SimpleTest/paint_listener.js"></script>
<script src="chrome://mochitests/content/browser/gfx/layers/apz/test/mochitest/apz_test_utils.js"></script>
<link rel="stylesheet" type="text/css" href="chrome://mochikit/content/tests/SimpleTest/test.css" />
<style>
div {
  width: 50px;
  height: 50px;
};
</style>
</head>
<body>
<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1778486">Mozilla Bug 1778486</a>
<p id="display"></p>
<div id="target_mouse" style="background: red;"></div>
<div id="target_touch" style="background: green;"></div>
<script>

function waitForEvent(aTarget, aEvent) {
  return new Promise(resolve => {
    aTarget.addEventListener(aEvent, resolve, { once: true });
  });
}

function getLastOverWindowPointerLocationScreenOffset() {
  let x = {};
  let y = {};
  let topWindow = window.browsingContext.topChromeWindow;
  topWindow.windowUtils.getLastOverWindowPointerLocationInCSSPixels(x, y);
  return {
    x: Math.trunc(x.value + topWindow.mozInnerScreenX),
    y: Math.trunc(y.value + topWindow.mozInnerScreenY),
  };
}

function getElementScreenOffsetAtCentral(aElement) {
  let rect = aElement.getBoundingClientRect();
  return {
    x: Math.trunc(rect.width / 2 + rect.left + mozInnerScreenX),
    y: Math.trunc(rect.height / 2 + rect.top + mozInnerScreenY),
  };
}

add_setup(async function() {
  await SpecialPowers.pushPrefEnv({ set: [["test.events.async.enabled", true]] });
  await waitUntilApzStable();
});

/** Test for Bug 1778486 **/
add_task(async function test_mouse() {
  let target = document.getElementById("target_mouse");
  let promise = waitForEvent(target, "click");
  synthesizeMouseAtCenter(target, {});
  await promise;

  isDeeply(
    getLastOverWindowPointerLocationScreenOffset(),
    getElementScreenOffsetAtCentral(target),
    "check last pointer location");
});

add_task(async function test_touch() {
  let target = document.getElementById("target_touch");
  let promise = waitForEvent(target, "pointerup");
  synthesizeTouchAtCenter(target, { type: "touchstart" });
  synthesizeTouchAtCenter(target, { type: "touchend" });
  await promise;

  isDeeply(
    getLastOverWindowPointerLocationScreenOffset(),
    getElementScreenOffsetAtCentral(target),
    "check last pointer location");
});

</script>
</pre>
</body>
</html>
