blob: 70bb3810e2b7f17afb3b5cf83eef845adc71d1cd (
plain)
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
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
|
<!DOCTYPE html>
<link rel=author href="mailto:jarhar@chromium.org">
<link rel=author href="mailto:falken@chromium.org">
<link rel=help href="https://html.spec.whatwg.org/multipage/interactive-elements.html#the-dialog-element">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<style>
body {
height: 10000px;
}
dialog {
padding: 0;
height: 50px;
width: 50px;
}
#console {
position: fixed;
}
</style>
<dialog id="top-dialog"></dialog>
<dialog id="first-middle-dialog"></dialog>
<dialog id="second-middle-dialog" style="left: 100px"></dialog>
<dialog id="bottom-dialog"></dialog>
<script>
test(() => {
function documentHeight() {
// clientHeight is an integer, but we want the correct floating point
// value. Start a binary search at clientHeight-1 and clientHeight+1.
let min = document.documentElement.clientHeight;
let max = min + 1;
--min;
// binary search with media queries to find the correct height
for (let iter = 0; iter < 10; ++iter) {
let test = (min + max) / 2;
if (window.matchMedia(`(min-height: ${test}px)`).matches)
min = test;
else
max = test;
}
return min;
}
function expectedTop(dialog) {
let height = documentHeight();
return (height - dialog.getBoundingClientRect().height) / 2;
}
function showAndTest(id) {
dialog = document.getElementById(id);
dialog.showModal();
assert_approx_equals(dialog.getBoundingClientRect().top, expectedTop(dialog), 0.05, id);
}
showAndTest('top-dialog');
window.scroll(0, 100);
showAndTest('first-middle-dialog');
showAndTest('second-middle-dialog');
window.scroll(0, 200);
showAndTest('bottom-dialog');
}, 'Test that multiple dialogs are centered properly.');
</script>
|
