firefox-main/gfx/layers/apz/test/mochitest/test_wheel_scroll.html (file symbol)

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Test Info: Warnings

<!DOCTYPE HTML>
<html>
<!--
-->
<head>
<title>Test for Bug 1013412 and 1168182</title>
<script src="/tests/SimpleTest/SimpleTest.js"></script>
<script src="/tests/SimpleTest/EventUtils.js"></script>
<script src="/tests/SimpleTest/paint_listener.js"></script>
<script type="application/javascript" src="apz_test_utils.js"></script>
<script type="application/javascript" src="apz_test_native_event_utils.js"></script>
<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
<style>
#content {
height: 800px;
overflow: scroll;
}
#scroller {
height: 2000px;
background: repeating-linear-gradient(#EEE, #EEE 100px, #DDD 100px, #DDD 200px);
}
#scrollbox {
margin-top: 200px;
width: 500px;
height: 500px;
border-radius: 250px;
box-shadow: inset 0 0 0 60px #555;
background: #777;
}
#circle {
position: relative;
left: 240px;
top: 20px;
border: 10px solid white;
border-radius: 10px;
width: 0px;
height: 0px;
transform-origin: 10px 230px;
will-change: transform;
}
</style>
</head>
<body>
<p id="display"></p>
<div id="content">
<p>Scrolling the page should be async, but scrolling over the dark circle should not scroll the page and instead rotate the white ball.</p>
<div id="scroller">
<div id="scrollbox">
<div id="circle"></div>
</div>
</div>
</div>
<pre id="test">
<script type="application/javascript">
var rotation = 0;
var rotationAdjusted = false;
var incrementForMode = function(mode) {
switch (mode) {
case WheelEvent.DOM_DELTA_PIXEL: return 1;
case WheelEvent.DOM_DELTA_LINE: return 15;
case WheelEvent.DOM_DELTA_PAGE: return 400;
}
return 0;
};
document.getElementById("scrollbox").addEventListener("wheel", function(e) {
rotation += e.deltaY * incrementForMode(e.deltaMode) * 0.2;
document.getElementById("circle").style.transform = "rotate(" + rotation + "deg)";
rotationAdjusted = true;
e.preventDefault();
});
async function test() {
var content = document.getElementById("content");
// enough iterations that we would scroll to the bottom of 'content'
for (let i = 0; i < 600 && content.scrollTop != content.scrollTopMax; i++) {
await promiseNativeWheelAndWaitForWheelEvent(content, 100, 150, 0, -5);
}
is(content.scrollTop > 0, true, "We should have scrolled down somewhat");
is(content.scrollTop, content.scrollTopMax, "We should have scrolled to the bottom of the scrollframe");
is(rotationAdjusted, false, "The rotation should not have been adjusted");
}
SimpleTest.waitForExplicitFinish();
// If we allow smooth scrolling the "smooth" scrolling may cause the page to
// glide past the scrollbox (which is supposed to stop the scrolling) and so
// we might end up at the bottom of the page.
pushPrefs([["general.smoothScroll", false],
["mousewheel.transaction.timeout", 100000],
["dom.event.wheel-event-groups.enabled", true]])
.then(waitUntilApzStable)
.then(test)
.then(SimpleTest.finish, SimpleTest.finishWithFailure);
</script>
</pre>
</body>
</html>