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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<script src="apz_test_utils.js"></script>
<script src="apz_test_native_event_utils.js"></script>
<script src="/tests/SimpleTest/EventUtils.js"></script>
<script src="/tests/SimpleTest/paint_listener.js"></script>
<style>
html, body { margin: 0; }
body {
height: 10000px;
}
</style>
<script>
const searchParams = new URLSearchParams(location.search);
async function test() {
var scrollendCount = 0;
function onScrollend() {
scrollendCount += 1;
}
switch (searchParams.get("chrome-only")) {
case "true":
// Add chrome-only event listener.
SpecialPowers.addChromeEventListener("scrollend", onScrollend, true);
break;
case "false":
// Add document event listener.
document.addEventListener("scrollend", onScrollend);
break;
default:
ok(false, "Unsupported chrome-only value: " + searchParams.get("chrome-only"));
break;
}
is(scrollendCount, 0, "A scrollend event should not be triggered yet");
await promiseFrame();
let wheelScrollTransformEndPromise = promiseTransformEnd();
await promiseMoveMouseAndScrollWheelOver(document.scrollingElement, 100, 100);
await wheelScrollTransformEndPromise;
await promiseFrame();
is(scrollendCount, 1, "A scrollend event should be triggered after user scroll");
scrollendCount = 0;
// Call the scrollTo function without behavior: smooth to trigger an instant
// programatic scroll.
scrollTo({ top: 500, left: 0 });
// Ensure the refresh driver has ticked.
await promiseFrame();
// A scrollend event should be posted after the refresh driver has ticked.
is(scrollendCount, 1, "A scrollend event should be triggered after instant scroll");
// If smooth scrolls are enabled, repeat the test with a smooth scroll.
if (SpecialPowers.getBoolPref("general.smoothScroll")) {
scrollendCount = 0;
let smoothScrollTransformEndPromise = promiseTransformEnd();
// Call the scrollTo function with behavior: smooth to trigger a programmatic
// scroll that should require some form of async transform.
scrollTo({ top: 1000, left: 0, behavior: "smooth" });
// Ensure the smooth scroll transform has finished.
await smoothScrollTransformEndPromise;
await promiseFrame();
is(scrollendCount, 1, "A scrollend event should be triggered after smooth scroll");
}
}
waitUntilApzStable()
.then(test)
.then(subtestDone, subtestFailed);
</script>
</head>
<body>
</body>
</html>