planning

node_modules/mdast-util-to-markdown/lib/util/format-link-as-autolink.js

@@ -0,0 +1,26 @@
+module.exports = formatLinkAsAutolink
+
+var toString = require('mdast-util-to-string')
+
+function formatLinkAsAutolink(node, context) {
+  var raw = toString(node)
+
+  return (
+    !context.options.resourceLink &&
+    // If there’s a url…
+    node.url &&
+    // And there’s a no title…
+    !node.title &&
+    // And the content of `node` is a single text node…
+    node.children &&
+    node.children.length === 1 &&
+    node.children[0].type === 'text' &&
+    // And if the url is the same as the content…
+    (raw === node.url || 'mailto:' + raw === node.url) &&
+    // And that starts w/ a protocol…
+    /^[a-z][a-z+.-]+:/i.test(node.url) &&
+    // And that doesn’t contain ASCII control codes (character escapes and
+    // references don’t work) or angle brackets…
+    !/[\0- <>\u007F]/.test(node.url)
+  )
+}