Template
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# latex
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功能：渲染 *latex* 公式
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大小：**≈300KB**
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作者：[@Zeng-J](https://github.com/Zeng-J)
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支持平台：
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| 微信小程序 | QQ 小程序 | 百度小程序 | 支付宝小程序 | 头条小程序 | uni-app |
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|:---:|:---:|:---:|:---:|:---:|:---:|
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| √ | √ | √ | √ | √ | √ |
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说明：
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引入本插件后，会将 *$xxx$* 的文本内容按照 *latex* 规则进行解析和渲染
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> 与 *editable* 插件共用时，编辑状态下，公式不会渲染，可以直接修改公式文本
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> 本插件通过 [katex-mini](https://github.com/rojer95/katex-mini) 解析 *latex* 文本，[字体文件](https://github.com/KaTeX/KaTeX/tree/main/fonts) 建议自行转存
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module.exports = {
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import: 'katex.css',
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handler (file) {
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if (file.isBuffer()) {
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let content = file.contents.toString()
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if (file.basename === 'node.wxml') {
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content = content.replace(/(n.?)\.name==='a'\|\|/g, "$1.name==='a'||$1.l||")
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} else if (file.basename === 'node.vue') {
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content = content.replace(/!handler.isInline\((.*?)\)/, '(n.l||!handler.isInline($1))')
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}
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file.contents = Buffer.from(content)
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}
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}
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}
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/**
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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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+1070
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function t(){return function(e){var t={};function r(n){if(t[n])return t[n].exports;var a=t[n]={i:n,l:!1,exports:{}};return e[n].call(a.exports,a,a.exports,r),a.l=!0,a.exports}return r.m=e,r.c=t,r.d=function(e,t,n){r.o(e,t)||Object.defineProperty(e,t,{enumerable:!0,get:n})},r.r=function(e){"undefined"!=typeof Symbol&&Symbol.toStringTag&&Object.defineProperty(e,Symbol.toStringTag,{value:"Module"}),Object.defineProperty(e,"__esModule",{value:!0})},r.t=function(e,t){if(1&t&&(e=r(e)),8&t)return e;if(4&t&&"object"==typeof e&&e&&e.__esModule)return e;var n=Object.create(null);if(r.r(n),Object.defineProperty(n,"default",{enumerable:!0,value:e}),2&t&&"string"!=typeof e)for(var a in e)r.d(n,a,function(t){return e[t]}.bind(null,a));return n},r.n=function(e){var t=e&&e.__esModule?function(){return e.default}:function(){return e};return r.d(t,"a",t),t},r.o=function(e,t){return Object.prototype.hasOwnProperty.call(e,t)},r.p="",r(r.s=0)}([function(e,t,r){"use strict";var n=this&&this.__assign||function(){return(n=Object.assign||function(e){for(var t,r=1,n=arguments.length;r<n;r++)for(var a in t=arguments[r])Object.prototype.hasOwnProperty.call(t,a)&&(e[a]=t[a]);return e}).apply(this,arguments)},a=this&&this.__importDefault||function(e){return e&&e.__esModule?e:{default:e}};Object.defineProperty(t,"__esModule",{value:!0}),t.createClass=void 0;var i=a(r(1));r(2);var o=/([A-Z])/g,s={"&":"&",">":">","<":"<",'"':""","'":"'"},l=/[&><"']/g;function h(e){return String(e).replace(l,(function(e){return s[e]}))}var c=function(e){return"data:image/svg+xml,"+encodeURIComponent(e.replace(/\s+/g," "))};t.createClass=function(e){var t;return null!==(t=null==e?void 0:e.filter((function(e){return e})).join(" "))&&void 0!==t?t:""};var m=function(e,r){return e.map((function(e){var n,a=r;(null===(n=null==e?void 0:e.style)||void 0===n?void 0:n.color)&&(a=e.style.color);var s=void 0;e instanceof i.default.__domTree.Span&&(s="span"),e instanceof i.default.__domTree.Anchor&&(s="anchor"),e instanceof i.default.__domTree.LineNode&&(s="line"),e instanceof i.default.__domTree.PathNode&&(s="path"),e instanceof i.default.__domTree.SvgNode&&(s="svg",a&&(e.attributes.fill=a)),e instanceof i.default.__domTree.SymbolNode&&(s="text");var l=e.children&&e.children.length>0?m(e.children,a):[];return s?function(e,r,n){var a=!1;r.classes&&r.classes.length>0&&(a=!0);var i,s=h((0,t.createClass)(r.classes)),l="";for(var m in"text"===e&&r.italic>0&&(l+="margin-right:"+r.italic+"em;"),r.style)r.style.hasOwnProperty(m)&&(l+="".concat((i=m,i.replace(o,"-$1").toLowerCase()),":").concat(r.style[m],";"));l&&(a=!0);var u={};for(var p in r.attributes)r.attributes.hasOwnProperty(p)&&(u[p]=h(r.attributes[p]));if("span"===e)return{name:"span",attrs:{class:s+" katex-span",style:l},children:n};if("text"===e){var d=h(r.text);return a?{name:"span",attrs:{class:s,style:l},children:[{type:"text",text:d}]}:{type:"text",text:d}}if("svg"===e){var f=r.toMarkup();return{name:"img",attrs:{src:c(f),class:"katex-svg"}}}return null}(s,e,l):l})).reduce((function(e,t){return Array.isArray(t)?e.push.apply(e,t):e.push(t),e}),[]).filter((function(e){return!!e}))};t.default=function(e,t){void 0===t&&(t={});try{var r=i.default.__renderToDomTree(e,n(n({},t),{output:"html"}));return m([r])}catch(e){return[{name:"span",attrs:{style:"color:red;"},children:[{type:"text",text:e.message}]}]}}},function(e,t,r){var n;"undefined"!=typeof self&&self,n=function(){return function(){"use strict";var e={d:function(t,r){for(var n in r)e.o(r,n)&&!e.o(t,n)&&Object.defineProperty(t,n,{enumerable:!0,get:r[n]})},o:function(e,t){return Object.prototype.hasOwnProperty.call(e,t)}},t={};e.d(t,{default:function(){return Fn}});var r=function e(t,r){this.position=void 0;var n,a="KaTeX parse error: "+t,i=r&&r.loc;if(i&&i.start<=i.end){var o=i.lexer.input;n=i.start;var s=i.end;n===o.length?a+=" at end of input: ":a+=" at position "+(n+1)+": ";var l=o.slice(n,s).replace(/[^]/g,"$&̲");a+=(n>15?"…"+o.slice(n-15,n):o.slice(0,n))+l+(s+15<o.length?o.slice(s,s+15)+"…":o.slice(s))}var h=new Error(a);return h.name="ParseError",h.__proto__=e.prototype,h.position=n,h};r.prototype.__proto__=Error.prototype;var n=r,a=/([A-Z])/g,i={"&":"&",">":">","<":"<",'"':""","'":"'"},o=/[&><"']/g,s=function e(t){return"ordgroup"===t.type||"color"===t.type?1===t.body.length?e(t.body[0]):t:"font"===t.type?e(t.body):t},l={contains:function(e,t){return-1!==e.indexOf(t)},deflt:function(e,t){return void 0===e?t:e},escape:function(e){return String(e).replace(o,(function(e){return i[e]}))},hyphenate:function(e){return e.replace(a,"-$1").toLowerCase()},getBaseElem:s,isCharacterBox:function(e){var t=s(e);return"mathord"===t.type||"textord"===t.type||"atom"===t.type},protocolFromUrl:function(e){var t=/^\s*([^\\/#]*?)(?::|�*58|�*3a)/i.exec(e);return null!=t?t[1]:"_relative"}},h={displayMode:{type:"boolean",description:"Render math in display mode, which puts the math in display style (so \\int and \\sum are large,
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