From ab1e611fccb7362503783fa1821e67c44e5d591a Mon Sep 17 00:00:00 2001
From: Keith Chu <cqroot@outlook.com>
Date: Wed, 12 Apr 2023 05:05:22 +0800
Subject: [PATCH] feat: enable ==mark== syntax (#79)

---
 .github/workflows/test.yml  |  2 ++
 package-lock.json           | 11 +++++++++++
 package.json                |  1 +
 src/markdownHeaders.test.ts | 14 ++++++++++++++
 src/markdownHeaders.ts      |  3 ++-
 test/markdownHeaders_79.md  |  1 +
 6 files changed, 31 insertions(+), 1 deletion(-)
 create mode 100644 test/markdownHeaders_79.md

diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index f000ee4..debf6c7 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -23,6 +23,8 @@ jobs:
 
       - name: Setup Node
         uses: actions/setup-node@v3
+        with:
+          node-version: '16.x'
 
       - run: npm install
 
diff --git a/package-lock.json b/package-lock.json
index c3d4fb2..ebb8054 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -12,6 +12,7 @@
       "dependencies": {
         "katex": "^0.16.2",
         "markdown-it": "^13.0.1",
+        "markdown-it-mark": "^3.0.1",
         "uslug": "git+https://github.com/laurent22/uslug.git#emoji-support"
       },
       "devDependencies": {
@@ -6743,6 +6744,11 @@
         "markdown-it": "bin/markdown-it.js"
       }
     },
+    "node_modules/markdown-it-mark": {
+      "version": "3.0.1",
+      "resolved": "https://registry.npmmirror.com/markdown-it-mark/-/markdown-it-mark-3.0.1.tgz",
+      "integrity": "sha512-HyxjAu6BRsdt6Xcv6TKVQnkz/E70TdGXEFHRYBGLncRE9lBFwDNLVtFojKxjJWgJ+5XxUwLaHXy+2sGBbDn+4A=="
+    },
     "node_modules/markdown-it/node_modules/argparse": {
       "version": "2.0.1",
       "resolved": "https://registry.npmjs.org/argparse/-/argparse-2.0.1.tgz",
@@ -16579,6 +16585,11 @@
         }
       }
     },
+    "markdown-it-mark": {
+      "version": "3.0.1",
+      "resolved": "https://registry.npmmirror.com/markdown-it-mark/-/markdown-it-mark-3.0.1.tgz",
+      "integrity": "sha512-HyxjAu6BRsdt6Xcv6TKVQnkz/E70TdGXEFHRYBGLncRE9lBFwDNLVtFojKxjJWgJ+5XxUwLaHXy+2sGBbDn+4A=="
+    },
     "md5.js": {
       "version": "1.3.5",
       "resolved": "https://registry.npmjs.org/md5.js/-/md5.js-1.3.5.tgz",
diff --git a/package.json b/package.json
index 5a401ce..6e72f3f 100644
--- a/package.json
+++ b/package.json
@@ -43,6 +43,7 @@
   "dependencies": {
     "katex": "^0.16.2",
     "markdown-it": "^13.0.1",
+    "markdown-it-mark": "^3.0.1",
     "uslug": "git+https://github.com/laurent22/uslug.git#emoji-support"
   },
   "files": [
diff --git a/src/markdownHeaders.test.ts b/src/markdownHeaders.test.ts
index 28af469..0fc3404 100644
--- a/src/markdownHeaders.test.ts
+++ b/src/markdownHeaders.test.ts
@@ -51,3 +51,17 @@ test('headers after code highlighting', () => {
     slug: 'header-3',
   });
 });
+
+test('headers after code highlighting', () => {
+  const headers = markdownHeaders(
+    readFileSync('./test/markdownHeaders_79.md', 'utf-8'),
+  );
+  expect(headers.length).toBe(1);
+  expect(headers[0]).toEqual({
+    html: '<mark>Like <strong>this</strong></mark>',
+    level: 1,
+    lineno: 0,
+    number: '1',
+    slug: 'like-this',
+  });
+});
diff --git a/src/markdownHeaders.ts b/src/markdownHeaders.ts
index 429c5ae..b256277 100644
--- a/src/markdownHeaders.ts
+++ b/src/markdownHeaders.ts
@@ -1,7 +1,8 @@
 import getSlug from './markdownSlug';
 
 const katex = require('katex');
-const markdownit = require('markdown-it')({ html: true });
+const markdownit = require('markdown-it')({ html: true })
+  .use(require('markdown-it-mark'));
 
 function isHeader(line: string, context: any) {
   // check code block
diff --git a/test/markdownHeaders_79.md b/test/markdownHeaders_79.md
new file mode 100644
index 0000000..976ff32
--- /dev/null
+++ b/test/markdownHeaders_79.md
@@ -0,0 +1 @@
+# ==Like **this**==