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e1ec23e64d
This is server side so we don't need to worry about bundle size anyway. It'll be best if every language is available to use, so we can't forget about adding one.
66 lines
2 KiB
JavaScript
66 lines
2 KiB
JavaScript
/* global hexo */
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const Prism = require('prismjs')
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const entities = require('he')
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const { promisify } = require('util')
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const readFile = promisify(require('fs').readFile)
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const path = require('path')
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// oof
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// I think this is the way to add Prism components that it doesn't include
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// in the default build?
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global.Prism = Prism
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// the / is needed to force it to resolve to the directory
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require('prismjs/components/')()
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delete global.Prism
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const unhighlightedCodeRx = /<pre><code class="(.*)?">([\s\S]*?)<\/code><\/pre>/igm
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function highlight (lang, code) {
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const startTag = `<figure class="highlight ${lang}"><table><tr><td class="code"><pre>`
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const endTag = `</pre></td></tr></table></figure>`
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let parsedCode = ''
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if (Prism.languages[lang]) {
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parsedCode = Prism.highlight(code, Prism.languages[lang])
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} else {
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parsedCode = code
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}
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return startTag + parsedCode + endTag
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}
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function prismify (data) {
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data.content = data.content.replace(unhighlightedCodeRx,
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(_, lang, code) => highlight(lang, entities.decode(code)))
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return data
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}
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function code (args, content) {
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let lang = ''
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if (args[0].startsWith('lang:')) {
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lang = args.shift().replace(/^lang:/, '')
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}
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return highlight(lang, content)
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}
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function includeCode (args) {
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let lang = ''
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if (args[0].startsWith('lang:')) {
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lang = args.shift().replace(/^lang:/, '')
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}
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const file = path.join(hexo.source_dir, hexo.config.code_dir, args.join(' '))
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return readFile(file, 'utf8').then((code) => highlight(lang, code.trim()))
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}
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// Highlight as many things as we possibly can
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hexo.extend.tag.register('code', code, true)
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hexo.extend.tag.register('codeblock', code, true)
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hexo.extend.tag.register('include_code', includeCode, { async: true })
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hexo.extend.tag.register('include-code', includeCode, { async: true })
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// Hexo includes its own code block handling by default which may
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// cause the above to miss some things, so do another pass when the page
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// is done rendering to pick up any code blocks we may have missed.
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hexo.extend.filter.register('after_post_render', prismify)
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