[MathJax]\mmlToken

hbghlyj

1. \mmlToken{mi}[mathvariant=script]{kuing}

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$$\mmlToken{mi}[mathvariant=script]{kuing}$$来自mathjax.pdf第60页,源代码为

1. /**
2. * The mapping of control sequence to function calls
3. */
4. const MmlMap = new CommandMap('mmlMap', {
5. mi: ['mmlToken', 'mi'],
6. mo: ['mmlToken', 'mo'],
7. mn: ['mmlToken', 'mn'],
8. ms: ['mmlToken', 'ms'],
9. mtext: ['mmlToken', 'mtext']
10. }, {
11. mmlToken(parser, name, type) {
12. const typeClass = parser.configuration.nodeFactory.mmlFactory.
13. ˓→getNodeClass(type);
14. const def = parseAttributes(parser.GetBrackets(name), typeClass);
15. const text = convertEscapes(parser.GetArgument(name));
16. const mml = parser.create('node', type, [parser.create('text', text)], def);
17. if (type === 'mi') mml.setTeXclass = classORD;
18. parser.Push(mml);
19. }
20. });

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语法    \mmlToken{type}[attributes]{text}
(第3个参数text内含的指令不会被处理)

hbghlyj

$\mmlToken{mover}{}$
报错: mover is not a token element
根据MathML文档第3章, token element只有以下六种:

mi		identifier
mn		number
mo		operator, fence, or separator
mtext		text
mspace		space
ms		string literal

hbghlyj

那么怎样使用mover元素呢? MathJax的指令\overset可以做到这一点:

$\overset{\text{top}}{\text{bottom}}$

1. <math xmlns="http://www.w3.org/1998/Math/MathML">
2.   <mover>
3.     <mtext>bottom</mtext>
4.     <mtext>top</mtext>
5.   </mover>
6. </math>

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利用\mmlToken可以把“等号”拉长成为“双上划线”:

$\overset{=}{aaaaaaaa}$

$\overline{\overline{aaaaaaaa}}$

$\def\overscore{\mmlToken{mo}[stretchy="true"]{=}}
\overset{\overscore}{aaaaaaaa}$

$\def\overscore{\mmlToken{mo}[stretchy="true" accent="true"]{=}}
\overset{\overscore}{aaaaaaaa}$

1. $\overset{=}{aaaaaaaa}$
3. $\overline{\overline{aaaaaaaa}}$
5. $\def\overscore{\mmlToken{mo}[stretchy="true"]{=}}
6. \overset{\overscore}{aaaaaaaa}$
8. $\def\overscore{\mmlToken{mo}[stretchy="true" accent="true"]{=}}
9. \overset{\overscore}{aaaaaaaa}$

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注意,最后一个例子中,stretchy和accent属性是用空格分隔的,这是原先的设计,但是为了适应用户习惯,后来加入了对逗号分隔的支持