36 lines
961 B
JavaScript
36 lines
961 B
JavaScript
import {escape} from './utils';
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/*
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* global mermaid
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*/
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const mermaidChart = (code) => {
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try {
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// eslint-disable-next-line
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mermaid.parse(code)
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return `<div class="mermaid">${escape(code)}</div>`
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} catch ({ str, hash }) {
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return `<pre>${str}</pre>`
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}
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}
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const MermaidPlugin = (md) => {
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const origin = md.renderer.rules.fence.bind(md.renderer.rules)
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md.renderer.rules.fence = (tokens, idx, options, env, slf) => {
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const token = tokens[idx]
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const code = token.content.trim()
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if (typeof token.info === 'string' && token.info.trim() === 'mermaid') {
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return mermaidChart(code)
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}
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const firstLine = code.split(/\n/)[0].trim()
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if (firstLine === 'gantt' ||
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firstLine === 'sequenceDiagram' ||
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firstLine === 'erDiagram' ||
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firstLine.match(/^graph (?:TB|BT|RL|LR|TD);?$/)) {
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return mermaidChart(code)
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}
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return origin(tokens, idx, options, env, slf)
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}
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}
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export default MermaidPlugin
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