1 files changed, 26 insertions, 0 deletions
diff --git a/node_modules/vuepress/lib/markdown/lineNumbers.js b/node_modules/vuepress/lib/markdown/lineNumbers.js
new file mode 100644
index 00000000..bc95d2b0
--- /dev/null
+++ b/node_modules/vuepress/lib/markdown/lineNumbers.js
@@ -0,0 +1,26 @@
+// markdown-it plugin for generating line numbers.
+// It depends on preWrapper plugin.
+
+module.exports = md => {
+  const fence = md.renderer.rules.fence
+  md.renderer.rules.fence = (...args) => {
+    const rawCode = fence(...args)
+    const code = rawCode.slice(
+      rawCode.indexOf('<code>'),
+      rawCode.indexOf('</code>')
+    )
+
+    const lines = code.split('\n')
+    const lineNumbersCode = [...Array(lines.length - 1)]
+      .map((line, index) => `<span class="line-number">${index + 1}</span><br>`).join('')
+
+    const lineNumbersWrapperCode =
+      `<div class="line-numbers-wrapper">${lineNumbersCode}</div>`
+
+    const finalCode = rawCode
+      .replace('<!--beforeend-->', `${lineNumbersWrapperCode}<!--beforeend-->`)
+      .replace('extra-class', 'line-numbers-mode')
+
+    return finalCode
+  }
+}