81 lines
2.0 KiB
JavaScript
81 lines
2.0 KiB
JavaScript
/**
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* @fileoverview latex 插件
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* katex.min.js来源 https://github.com/rojer95/katex-mini
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*/
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const parse = require('./katex.min')
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function Latex () {
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}
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Latex.prototype.onParse = function (node, vm) {
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// $...$包裹的内容为latex公式
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if (!vm.options.editable && node.type === 'text' && node.text.includes('$')) {
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const part = node.text.split(/(\${1,2})/)
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const children = []
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let status = 0
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for (let i = 0; i < part.length; i++) {
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if (i % 2 === 0) {
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// 文本内容
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if (part[i]) {
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if (status === 0) {
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children.push({
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type: 'text',
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text: part[i]
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})
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} else {
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if (status === 1) {
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// 行内公式
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const nodes = parse.default(part[i])
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children.push({
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name: 'span',
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attrs: {},
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l: 'T',
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f: 'display:inline-block',
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children: nodes
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})
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} else {
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// 块公式
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const nodes = parse.default(part[i], {
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displayMode: true
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})
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children.push({
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name: 'div',
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attrs: {
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style: 'text-align:center'
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},
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children: nodes
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})
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}
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}
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}
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} else {
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// 分隔符
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if (part[i] === '$' && part[i + 2] === '$') {
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// 行内公式
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status = 1
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part[i + 2] = ''
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} else if (part[i] === '$$' && part[i + 2] === '$$') {
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// 块公式
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status = 2
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part[i + 2] = ''
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} else {
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if (part[i] && part[i] !== '$$') {
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// 普通$符号
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part[i + 1] = part[i] + part[i + 1]
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}
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// 重置状态
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status = 0
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}
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}
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}
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delete node.type
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delete node.text
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node.name = 'span'
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node.attrs = {}
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node.children = children
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}
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}
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module.exports = Latex
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