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fix: Improve MathML for math operators with subscripts (#2596)

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* Improve MathML for math operators with subscripts

* Add TODO re: MathML spacing

Co-authored-by: Kevin Barabash <kevinb@khanacademy.org>
This commit is contained in:
Ron Kok
2020-12-18 15:14:12 -08:00
committed by GitHub
parent f87c08bb1c
commit ef09291288
3 changed files with 139 additions and 159 deletions
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284
test/__snapshots__/mathml-spec.js.snap
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@@ -308,29 +308,27 @@ exports[`A MathML builder should output \\limsup_{x \\rightarrow \\infty} correc
<math xmlns="http://www.w3.org/1998/Math/MathML">
<semantics>
<mrow>
<mo>
<msub>
<mrow>
<mi mathvariant="normal">
lim sup
</mi>
<mo>
⁡
</mo>
</mrow>
<mrow>
<mi>
x
</mi>
<mo>
→
</mo>
<mi mathvariant="normal">
∞
</mi>
</mrow>
</msub>
</mo>
<msub>
<mrow>
<mi mathvariant="normal">
lim sup
</mi>
<mo>
⁡
</mo>
</mrow>
<mrow>
<mi>
x
</mi>
<mo>
→
</mo>
<mi mathvariant="normal">
∞
</mi>
</mrow>
</msub>
</mrow>
<annotation encoding="application/x-tex">
\\limsup_{x \\rightarrow \\infty}
@@ -345,29 +343,27 @@ exports[`A MathML builder should output \\limsup_{x \\rightarrow \\infty} in dis
>
<semantics>
<mrow>
<mo>
<munder>
<mrow>
<mi mathvariant="normal">
lim sup
</mi>
<mo>
⁡
</mo>
</mrow>
<mrow>
<mi>
x
</mi>
<mo>
→
</mo>
<mi mathvariant="normal">
∞
</mi>
</mrow>
</munder>
</mo>
<munder>
<mrow>
<mi mathvariant="normal">
lim sup
</mi>
<mo>
⁡
</mo>
</mrow>
<mrow>
<mi>
x
</mi>
<mo>
→
</mo>
<mi mathvariant="normal">
∞
</mi>
</mrow>
</munder>
</mrow>
<annotation encoding="application/x-tex">
\\limsup_{x \\rightarrow \\infty}
@@ -424,27 +420,25 @@ exports[`A MathML builder should render mathchoice as if there was nothing 1`] =
displaystyle="true"
>
<mrow>
<mo>
<munderover>
<mo>
∑
</mo>
<mrow>
<mi>
k
</mi>
<mo>
=
</mo>
<mn>
0
</mn>
</mrow>
<mi mathvariant="normal">
∞
<munderover>
<mo>
∑
</mo>
<mrow>
<mi>
k
</mi>
</munderover>
</mo>
<mo>
=
</mo>
<mn>
0
</mn>
</mrow>
<mi mathvariant="normal">
∞
</mi>
</munderover>
<msup>
<mi>
x
@@ -467,27 +461,25 @@ exports[`A MathML builder should render mathchoice as if there was nothing 2`] =
<math xmlns="http://www.w3.org/1998/Math/MathML">
<semantics>
<mrow>
<mo>
<msubsup>
<mo>
∑
</mo>
<mrow>
<mi>
k
</mi>
<mo>
=
</mo>
<mn>
0
</mn>
</mrow>
<mi mathvariant="normal">
∞
<msubsup>
<mo>
∑
</mo>
<mrow>
<mi>
k
</mi>
</msubsup>
</mo>
<mo>
=
</mo>
<mn>
0
</mn>
</mrow>
<mi mathvariant="normal">
∞
</mi>
</msubsup>
<msup>
<mi>
x
@@ -703,51 +695,45 @@ exports[`A MathML builder should use <msupsub> for integrals 1`] = `
<mstyle scriptlevel="0"
displaystyle="true"
>
<mo>
<msubsup>
<mo>
∫
</mo>
<mi>
a
</mi>
<mi>
b
</mi>
</msubsup>
</mo>
<msubsup>
<mo>
∫
</mo>
<mi>
a
</mi>
<mi>
b
</mi>
</msubsup>
<mo>
+
</mo>
<mo>
<msubsup>
<mo>
∯
</mo>
<mi>
a
</mi>
<mi>
b
</mi>
</msubsup>
</mo>
<msubsup>
<mo>
∯
</mo>
<mi>
a
</mi>
<mi>
b
</mi>
</msubsup>
<mo>
+
</mo>
<mo>
<msubsup>
<mo>
∰
</mo>
<mi>
a
</mi>
<mi>
b
</mi>
</msubsup>
</mo>
<msubsup>
<mo>
∰
</mo>
<mi>
a
</mi>
<mi>
b
</mi>
</msubsup>
</mstyle>
</mrow>
<annotation encoding="application/x-tex">
@@ -764,19 +750,17 @@ exports[`A MathML builder should use <msupsub> for regular operators 1`] = `
<mstyle scriptlevel="0"
displaystyle="false"
>
<mo>
<msubsup>
<mo>
∑
</mo>
<mi>
a
</mi>
<mi>
b
</mi>
</msubsup>
</mo>
<msubsup>
<mo>
∑
</mo>
<mi>
a
</mi>
<mi>
b
</mi>
</msubsup>
</mstyle>
</mrow>
<annotation encoding="application/x-tex">
@@ -793,19 +777,17 @@ exports[`A MathML builder should use <munderover> for large operators 1`] = `
<mstyle scriptlevel="0"
displaystyle="true"
>
<mo>
<munderover>
<mo>
∑
</mo>
<mi>
a
</mi>
<mi>
b
</mi>
</munderover>
</mo>
<munderover>
<mo>
∑
</mo>
<mi>
a
</mi>
<mi>
b
</mi>
</munderover>
</mstyle>
</mrow>
<annotation encoding="application/x-tex">