fix: replace gatsby-remark-auto-headers

2026-09-08 16:06:13 +02:00 · 2020-05-22 00:57:06 -04:00
parent 92c3fe086f
commit 82ac9f0bae
6 changed files with 262 additions and 1 deletions
@@ -0,0 +1,69 @@
+const visit = require(`unist-util-visit`)
+const slugs = require(`github-slugger`)()
+
+function toString(node) {
+  return (
+    valueOf(node) ||
+    (node.children && node.children.map(toString).join("")) ||
+    ""
+  )
+}
+function valueOf(node) {
+  return (
+    (node && node.value ? node.value : node.alt ? node.alt : node.title) || ""
+  )
+}
+
+function patch(context, key, value) {
+  if (!context[key]) {
+    context[key] = value
+  }
+  return context[key]
+}
+
+function stripLeadingNumber(value) {
+  return value.replace(/^(\d*\-)(.*)/, "$2")
+}
+
+const svgIcon = `<svg aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg>`
+
+module.exports = (
+  { markdownAST },
+  { icon = svgIcon, attr = "id", className = "anchor", maintainCase = false }
+) => {
+  slugs.reset()
+  visit(markdownAST, `heading`, (node) => {
+    const id = slugs.slug(toString(node), maintainCase)
+    const strippedId = stripLeadingNumber(id)
+    const data = patch(node, `data`, {})
+
+    patch(data, attr, strippedId)
+    patch(data, `htmlAttributes`, {})
+    patch(data, `hProperties`, {})
+    patch(data.htmlAttributes, attr, strippedId)
+    patch(data.hProperties, attr, strippedId)
+
+    if (icon !== false) {
+      node.children.unshift({
+        type: `link`,
+        url: `#${strippedId}`,
+        title: null,
+        data: {
+          hProperties: {
+            "aria-hidden": true,
+            class: className,
+          },
+          hChildren: [
+            {
+              type: `raw`,
+              // The Octicon link icon is the default. But users can set their own icon via the "icon" option.
+              value: icon,
+            },
+          ],
+        },
+      })
+    }
+  })
+
+  return markdownAST
+}