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<!DOCTYPE HTML>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, minimum-scale=1.0">
<title>Tests that the (internal) visual smooth scrolling API is not restricted to the layout scroll range</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>
div {
position: absolute;
}
</style>
</head>
<body>
<div style="width: 100%; height: 200%; background-color: green"></div>
<div style="width: 100%; height: 100%; background-color: blue"></div>
<script type="application/javascript">
const utils = SpecialPowers.getDOMWindowUtils(window);
async function test() {
// Pick a destination to scroll to that's outside the layout scroll range
// but within the visual scroll range.
const destY = window.scrollMaxY + 100;
// Register a TransformEnd observer so we can tell when the smooth scroll
// animation stops.
let transformEndPromise = promiseTransformEnd();
// Use scrollToVisual() to smooth-scroll to the destination.
utils.scrollToVisual(0, destY, utils.UPDATE_TYPE_MAIN_THREAD,
utils.SCROLL_MODE_SMOOTH);
// Wait for the TransformEnd.
await transformEndPromise;
// Give scroll offsets a chance to sync.
await promiseApzFlushedRepaints();
// Check that the visual viewport scrolled to the desired destination.
is(visualViewport.pageTop, destY,
"The visual viewport should have scrolled past the layout scroll range");
}
SpecialPowers.getDOMWindowUtils(window).setResolutionAndScaleTo(2.0);
waitUntilApzStable()
.then(test)
.then(subtestDone, subtestFailed);
</script>
</body>
</html>
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