1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
|
<!DOCTYPE HTML>
<html>
<head>
<title>Media Queries with Zoom</title>
<script src="/tests/SimpleTest/SimpleTest.js"></script>
<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css">
</head>
<body>
<div>Testing media queries with different zoom levels</div>
<script type="application/javascript">
const originalDPR = window.devicePixelRatio;
const originalZoom = SpecialPowers.getFullZoom(window);
const zoomsToTest = [
300,
240,
200,
170,
150,
133,
120,
110,
100,
90,
80,
67,
50,
30,
];
for (let i = 0; i < zoomsToTest.length; ++i) {
let zoomPercent = zoomsToTest[i];
let relativeZoom = originalZoom * zoomPercent / 100;
SpecialPowers.setFullZoom(window, relativeZoom);
let actualZoom = SpecialPowers.getDeviceFullZoom(window);
let targetDPR = (originalDPR * actualZoom);
let actualDPR = window.devicePixelRatio;
let mql = window.matchMedia(`(resolution: ${targetDPR}dppx)`);
ok(mql.matches, `At ${zoomPercent}% zoom, target ${targetDPR}dppx matches ${actualDPR}dppx.`);
}
// Reset the zoom when the test is done.
SpecialPowers.setFullZoom(window, originalZoom);
</script>
</body>
</html>
|
