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
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
|
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Embellished operators - tree change and relayout</title>
<link rel="stylesheet" type="text/css" href="/fonts/ahem.css" />
<link rel="help" href="https://w3c.github.io/mathml-core/#embellished-operators">
<link rel="help" href="https://w3c.github.io/mathml-core/#definition-of-space-like-elements">
<link rel="help" href="https://w3c.github.io/mathml-core/#layout-of-mrow">
<link rel="help" href="https://chromium-review.googlesource.com/c/chromium/src/+/3059456">
<meta name="assert" content="Verify relayout of an mrow with a child that has a deeply nested <mo> element.">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/mathml/support/mathml-fragments.js"></script>
<script src="/mathml/support/fonts.js"></script>
<style>
math, math * {
font: 25px/1 Ahem;
}
mn {
color: black;
}
.relative_positioned_and_fixed_size {
position: relative;
height: 0px;
width: 0px;
overflow: scroll;
}
</style>
<script>
setup({ explicit_done: true });
window.addEventListener("load", () => { loadAllFonts().then(runTests); });
function runTests() {
var epsilon = 1;
var emToPx = 25;
function assertCorrectSpacing(container,
zero_size_mrow_is_embellished_op) {
// The container should add lspace/rspace around the zero size mrow
// if and only if that mrow is an embellished operator.
let mnBefore = container.children[0].getBoundingClientRect();
let zeroSizeMrow = container.children[1].getBoundingClientRect();
let mnAfter = container.children[2].getBoundingClientRect();
assert_approx_equals(zeroSizeMrow.left - mnBefore.right,
zero_size_mrow_is_embellished_op ?
emToPx * 1 : 0, epsilon,
"lspace");
assert_approx_equals(mnAfter.left - zeroSizeMrow.right,
zero_size_mrow_is_embellished_op ?
emToPx * 2 : 0, epsilon,
"rspace");
}
let container1 = document.getElementById("container1");
test(function() {
assertCorrectSpacing(container1, true);
}, "container1: Initially an embellished operator");
let container2 = document.getElementById("container2");
test(function() {
assertCorrectSpacing(container2, false);
}, "container2: Initially not an embellished operator");
test(function() {
let mrow1 = document.getElementById("change_to_not_embellished_operator");
mrow1.appendChild(FragmentHelper.createElement("mn"));
assertCorrectSpacing(container1, false);
}, " container1: No longer an embellished operator");
test(function() {
let mrow2 = document.getElementById("change_to_embellished_operator");
mrow2.removeChild(mrow2.lastElementChild);
assertCorrectSpacing(container2, true);
}, "container2: Became an embellished operator");
let container3 = document.getElementById("container3");
test(function() {
assertCorrectSpacing(container3, true);
}, "container3: Initially an embellished operator (testing space-like)");
let container4 = document.getElementById("container4");
test(function() {
assertCorrectSpacing(container4, false);
}, "container4/space-like: Initially not an embellished operator (testing space-like)");
test(function() {
let mrow = document.getElementById("change_to_not_space_like");
mrow.appendChild(FragmentHelper.createElement("mn"));
assertCorrectSpacing(container3, false);
}, " container3: No longer an embellished operator (testing space-like)");
test(function() {
let mrow = document.getElementById("change_to_space_like");
mrow.removeChild(mrow.lastElementChild);
assertCorrectSpacing(container4, true);
}, "container4: Became an embellished operator (testing space-like)");
done();
}
</script>
</head>
<body>
<div id="log"></div>
<div>
<math display="block">
<mrow id="container1">
<mn>1</mn>
<mrow class="relative_positioned_and_fixed_size">
<mrow id="change_to_not_embellished_operator">
<mrow>
<mo lspace="1em" rspace="2em"></mo>
</mrow>
</mrow>
</mrow>
<mn>2</mn>
</mrow>
</math>
</div>
<div>
<math display="block">
<mrow id="container2">
<mn>3</mn>
<mrow class="relative_positioned_and_fixed_size">
<mrow id="change_to_embellished_operator">
<mrow>
<mo lspace="1em" rspace="2em"></mo>
</mrow>
<mn></mn>
</mrow>
</mrow>
<mn>4</mn>
</mrow>
</math>
</div>
<div>
<math display="block">
<mrow id="container3">
<mn>5</mn>
<mrow>
<mrow>
<mrow>
<mo lspace="1em" rspace="2em"></mo>
</mrow>
<mrow class="relative_positioned_and_fixed_size">
<mrow id="change_to_not_space_like">
<mspace></mspace>
<mtext></mtext>
</mrow>
</mrow>
</mrow>
</mrow>
<mn>6</mn>
</mrow>
</math>
</div>
<div>
<math display="block">
<mrow id="container4">
<mn>7</mn>
<mrow>
<mrow>
<mrow>
<mo lspace="1em" rspace="2em"></mo>
</mrow>
<mrow class="relative_positioned_and_fixed_size">
<mrow id="change_to_space_like">
<mspace></mspace>
<mtext></mtext>
<mn></mn>
</mrow>
</mrow>
</mrow>
</mrow>
<mn>8</mn>
</mrow>
</math>
</div>
</body>
</html>
|
