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<!DOCTYPE HTML>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width; initial-scale=1.0,minimum-scale=1.0">
<title>Ensure layout viewport responds to panning while pinched</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>
body {
margin: 0;
padding: 0;
}
#content {
height: 5000px;
width: 5000px;
background: repeating-linear-gradient(#EEE, #EEE 100px, #DDD 100px, #DDD 200px);
}
</style>
</head>
<body>
<div id="content"></div>
<script type="application/javascript">
const RESOLUTION = 4;
const OFFSET_SCREEN_PX = 50;
const OFFSET_CSS_PX = OFFSET_SCREEN_PX / RESOLUTION;
function computeDelta(visual) {
// Compute the distance from the right/bottom edge of the visual
// viewport to the same edge of the layout viewport and add the desired
// offset to that.
// We can ignore scrollbar width here since the scrollbar is layouted at
// the right/bottom edge of this content, not of this window in the case
// of containerful scrolling.
return visual - (visual / RESOLUTION) + OFFSET_CSS_PX;
}
async function test() {
const cases = [
{
x: 0,
y: 0,
dx: (width) => -computeDelta(width),
dy: () => 0,
expected: {
x: [OFFSET_CSS_PX, "x-offset was adjusted"],
y: [0, "y-offset was not affected"],
},
},
{
x: OFFSET_CSS_PX,
y: 0,
dx: () => 0,
dy: (height) => -computeDelta(height),
expected: {
x: [OFFSET_CSS_PX, "x-offset was not affected"],
y: [OFFSET_CSS_PX, "y-offset was adjusted"],
},
},
];
for (let c of cases) {
await promiseNativeTouchDrag(window,
c.x,
c.y,
c.dx(document.documentElement.clientWidth),
c.dy(document.documentElement.clientHeight));
await promiseApzFlushedRepaints();
is(window.scrollX, c.expected.x[0], c.expected.x[1]);
is(window.scrollY, c.expected.y[0], c.expected.y[1]);
}
}
SpecialPowers.getDOMWindowUtils(window).setResolutionAndScaleTo(RESOLUTION);
waitUntilApzStable().then(test).then(subtestDone, subtestFailed);
</script>
</body>
</html>
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