From 0735764a34b7c7d88fe29b5ff6f3cb9719c11c16 Mon Sep 17 00:00:00 2001
From: Le Tan <tamlokveer@gmail.com>
Date: Tue, 22 Dec 2020 19:54:25 +0800
Subject: [PATCH] remove heading sequence in header ID

---
 src/data/extra/web/js/markdownit.js     | 5 ++++-
 src/data/extra/web/js/nodelinemapper.js | 2 +-
 src/data/extra/web/js/utils.js          | 4 ++++
 3 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/src/data/extra/web/js/markdownit.js b/src/data/extra/web/js/markdownit.js
index 7248227e..30d11f0a 100644
--- a/src/data/extra/web/js/markdownit.js
+++ b/src/data/extra/web/js/markdownit.js
@@ -317,7 +317,10 @@ class MarkdownIt extends VxWorker {
     }
 
     generateHeaderId(p_headerIds, p_str) {
-        let idBase = p_str.replace(/\s/g, '-').toLowerCase();
+        // Remove leading heading sequence.
+        let regExp = Utils.headingSequenceRegExp();
+        let idBase = p_str.replace(regExp, '');
+        idBase = idBase.replace(/\s/g, '-').toLowerCase();
         let id = idBase;
         let idx = 1;
         while (p_headerIds.has(id)) {
diff --git a/src/data/extra/web/js/nodelinemapper.js b/src/data/extra/web/js/nodelinemapper.js
index f509a907..fe9702a0 100644
--- a/src/data/extra/web/js/nodelinemapper.js
+++ b/src/data/extra/web/js/nodelinemapper.js
@@ -46,7 +46,7 @@ class NodeLineMapper {
         this.headingNodes = this.container.querySelectorAll("h1, h2, h3, h4, h5, h6");
         let headings = [];
         let needSectionNumber = window.vxOptions.sectionNumberEnabled;
-        let regExp = /^\d(?:\.\d)*\.? /;
+        let regExp = Utils.headingSequenceRegExp();
         for (let i = 0; i < this.headingNodes.length; ++i) {
             let node = this.headingNodes[i];
             let headingContent = this.getHeadingContent(node);
diff --git a/src/data/extra/web/js/utils.js b/src/data/extra/web/js/utils.js
index 9f733676..4eaee62d 100644
--- a/src/data/extra/web/js/utils.js
+++ b/src/data/extra/web/js/utils.js
@@ -109,4 +109,8 @@ class Utils {
         }
         return true;
     }
+
+    static headingSequenceRegExp() {
+        return /^\d(?:\.\d)*\.? /;
+    }
 }