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<!DOCTYPE HTML>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=2100"/>
<title>Check that tall element wider than the viewport doesn't scroll to the top</title>
<script type="application/javascript" src="apz_test_native_event_utils.js"></script>
<script type="application/javascript" src="apz_test_utils.js"></script>
<script src="/tests/SimpleTest/paint_listener.js"></script>
<script type="application/javascript">
// Although this test has hscrollable in the name, it does not test any
// horizontal scrolling. Rather it is the mere presence of horizontally
// scrollable content that triggers this bug (it confused the code that
// picked a rect to zoom to).
async function test() {
let useTouchpad = (location.search == "?touchpad");
let resolution = await getResolution();
ok(resolution > 0,
"The initial_resolution is " + resolution + ", which is some sane value");
// instant scroll down
window.scrollTo({
top: window.innerHeight * 2,
left: 0,
behavior: 'auto'
});
await promiseApzFlushedRepaints();
let scrollPos = window.scrollY;
ok(scrollPos > window.innerHeight * 2 - 50, "window scrolled down");
info("window.scrollY " + window.scrollY);
info("window.innerHeight " + window.innerHeight);
info("document.documentElement.scrollHeight " + document.documentElement.scrollHeight);
let target = document.getElementById("target");
let x = 20;
let y = scrollPos + window.innerHeight / 2;
// Check that second double tap does not scroll up
info("sending second double tap");
await doubleTapOn(target, x, y, useTouchpad);
prev_resolution = resolution;
resolution = await getResolution();
ok(resolution == prev_resolution, "After double-tap the resolution is the same: " + resolution);
ok(window.scrollY > window.innerHeight * 2 - 50, "window is still scrolled down");
ok(Math.abs(window.scrollY - scrollPos) < 1, "window didnt scroll");
info("window.scrollY " + window.scrollY);
}
waitUntilApzStable()
.then(test)
.then(subtestDone, subtestFailed);
</script>
<style>
.spacer {
background-color: #eee;
height: 800vh;
width: 200vw;
}
.rect {
width: 90vw;
height: 30px;
background-color: #aaa;
}
</style>
</head>
<body>
<div id="firsttarget" class="rect">
</div>
<div id="target" class="spacer">
</div>
</body>
</html>
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