From d76e7c054e51471c908707634f5dbdcd3422b8d9 Mon Sep 17 00:00:00 2001
From: Armand Philippot <git@armandphilippot.com>
Date: Mon, 3 Jan 2022 15:32:01 +0100
Subject: chore: add line numbers to all prism blocks and translate copy button

---
 src/utils/helpers/prism.ts | 51 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 51 insertions(+)
 create mode 100644 src/utils/helpers/prism.ts

(limited to 'src/utils/helpers/prism.ts')

diff --git a/src/utils/helpers/prism.ts b/src/utils/helpers/prism.ts
new file mode 100644
index 0000000..86c8f7d
--- /dev/null
+++ b/src/utils/helpers/prism.ts
@@ -0,0 +1,51 @@
+import { t } from '@lingui/macro';
+
+/**
+ * Check if the current block has a defined language.
+ * @param classList - A list of class.
+ * @returns {boolean} - True if a class starts with "language-".
+ */
+const isLanguageBlock = (classList: DOMTokenList) => {
+  const classes = Array.from(classList);
+  return classes.some((className) => /language-.*/.test(className));
+};
+
+/**
+ * Add automatically some classes and attributes for PrismJs.
+ *
+ * These classes and attributes are needed by Prism or to customize comments.
+ */
+export const addPrismClasses = () => {
+  const preTags = document.getElementsByTagName('pre');
+
+  Array.from(preTags).forEach((preTag) => {
+    if (
+      isLanguageBlock(preTag.classList) &&
+      !preTag.classList.contains('command-line') &&
+      !preTag.classList.contains('language-diff')
+    ) {
+      preTag.classList.add('line-numbers', 'match-braces');
+    }
+
+    if (
+      preTag.classList.contains('command-line') &&
+      preTag.classList.contains('filter-output')
+    ) {
+      preTag.setAttribute('data-filter-output', '#output#');
+    }
+  });
+};
+
+/**
+ * Translate the PrismJS Copy to clipboard button.
+ */
+export const translateCopyButton = (locale: string) => {
+  const articles = document.getElementsByTagName('article');
+
+  Array.from(articles).forEach((article) => {
+    article.setAttribute('lang', locale);
+    article.setAttribute('data-prismjs-copy', t`Copy`);
+    article.setAttribute('data-prismjs-copy-success', t`Copied!`);
+    article.setAttribute('data-prismjs-copy-error', t`Use Ctrl+c to copy`);
+  });
+};
-- 
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