planning

node_modules/hast-util-to-mdast/lib/handlers/code.js

@@ -0,0 +1,48 @@
+'use strict'
+
+module.exports = code
+
+var has = require('hast-util-has-property')
+var convert = require('hast-util-is-element/convert')
+var toText = require('hast-util-to-text')
+var trim = require('trim-trailing-lines')
+var wrapText = require('../util/wrap-text')
+
+var prefix = 'language-'
+
+var pre = convert('pre')
+var isCode = convert('code')
+
+function code(h, node) {
+  var children = node.children
+  var index = -1
+  var classList
+  var lang
+
+  if (pre(node)) {
+    while (++index < children.length) {
+      if (isCode(children[index]) && has(children[index], 'className')) {
+        classList = children[index].properties.className
+        break
+      }
+    }
+  }
+
+  if (classList) {
+    index = -1
+
+    while (++index < classList.length) {
+      if (classList[index].slice(0, prefix.length) === prefix) {
+        lang = classList[index].slice(prefix.length)
+        break
+      }
+    }
+  }
+
+  return h(
+    node,
+    'code',
+    {lang: lang || null, meta: null},
+    trim(wrapText(h, toText(node)))
+  )
+}