Implement cspreview renderer

Signed-off-by: Yukai Huang <yukaihuangtw@gmail.com>

Author: Yukaii

package-lock.json

@@ -169,6 +169,7 @@
     "mock-require": "~3.0.3",
     "nyc": "~14.0.0",
     "optimize-css-assets-webpack-plugin": "~5.0.0",
+    "papaparse": "^5.2.0",
     "pdfobject": "~2.1.1",
     "plantuml-encoder": "^1.2.5",
     "power-assert": "~1.6.1",

package.json

@@ -25,6 +25,7 @@ import {
 } from './lib/markdown/utils'
 import { renderFretBoard } from './lib/renderer/fretboard/fretboard'
 import './lib/renderer/lightbox'
+import { renderCSVPreview } from './lib/renderer/csvpreview'
 
 import markdownit from 'markdown-it'
 import markdownitContainer from 'markdown-it-container'
@@ -1211,6 +1212,12 @@ md.renderer.rules.fence = (tokens, idx, options, env, self) => {
 
   if (info) {
     langName = info.split(/\s+/g)[0]
+
+    if (langName === 'csvpreview') {
+      const params = parseFenceCodeParams(info)
+      return renderCSVPreview(token.content, params)
+    }
+
     if (/!$/.test(info)) token.attrJoin('class', 'wrap')
     token.attrJoin('class', options.langPrefix + langName.replace(/=$|=\d+$|=\+$|!$|=!$/, ''))
     token.attrJoin('class', 'hljs')

public/js/extra.js

@@ -2786,7 +2786,9 @@ function updateViewInner () {
   var lastMeta = md.meta
   md.meta = {}
   delete md.metaError
-  var rendered = md.render(value)
+  const mdEnv = {}
+  window.mdTokens = md.parse(value, mdEnv)
+  let rendered = md.renderer.render(window.mdTokens, md.options, mdEnv)
   if (md.meta.type && md.meta.type === 'slide') {
     var slideOptions = {
       separator: '^(\r\n?|\n)---(\r\n?|\n)$',

public/js/index.js

@@ -0,0 +1,43 @@
+import Papa from 'papaparse'
+
+const safeParse = d => {
+  try {
+    return JSON.parse(d)
+  } catch (err) {
+    return d
+  }
+}
+
+export function renderCSVPreview (csv, options = {}, attr = '') {
+  const opt = Object.keys(options).reduce((acc, key) => {
+    return Object.assign(acc, {
+      [key]: safeParse(options[key])
+    })
+  }, {})
+
+  const results = Papa.parse(csv.trim(), opt)
+
+  if (opt.header) {
+    const fields = results.meta.fields
+    return `<table ${attr}>
+      <thead>
+        <tr>
+          ${fields.map(f => `<th>${f}</th>`).join('')}
+        </tr>
+      </thead>
+      <tbody>
+        ${results.data.map(d => `<tr>
+          ${fields.map(f => `<td>${d[f]}</td>`).join('')}
+        </tr>`).join('')}
+      </tbody>
+    </table>`
+  } else {
+    return `<table ${attr}>
+      <tbody>
+        ${results.data.map(d => `<tr>
+          ${d.map(f => `<td>${f}</td>`).join('')}
+        </tr>`).join('')}
+      </tbody>
+    </table>`
+  }
+}

public/js/lib/renderer/csvpreview.js

@@ -7,6 +7,8 @@ import markdownitContainer from 'markdown-it-container'
 import { md } from '../extra'
 import modeType from './modeType'
 import appState from './appState'
+import { renderCSVPreview } from './renderer/csvpreview'
+import { parseFenceCodeParams } from './markdown/utils'
 
 function addPart (tokens, idx) {
   if (tokens[idx].map && tokens[idx].level === 0) {
@@ -71,6 +73,18 @@ md.renderer.rules.fence = (tokens, idx, options, env, self) => {
 
   if (info) {
     langName = info.split(/\s+/g)[0]
+
+    if (langName === 'csvpreview') {
+      const params = parseFenceCodeParams(info)
+      let attr = ''
+      if (tokens[idx].map && tokens[idx].level === 0) {
+        const startline = tokens[idx].map[0] + 1
+        const endline = tokens[idx].map[1]
+        attr = `class="part" data-startline="${startline}" data-endline="${endline}"`
+      }
+      return renderCSVPreview(token.content, params, attr)
+    }
+
     if (/!$/.test(info)) token.attrJoin('class', 'wrap')
     token.attrJoin('class', options.langPrefix + langName.replace(/=$|=\d+$|=\+$|!$|=!/, ''))
     token.attrJoin('class', 'hljs')