Add chapter title anchors

examples/config.yml

@@ -61,6 +61,7 @@ http:
   <<: *css_classes
   format: html
   relative_urls: true
+  chapter_anchor_prefix: 'chapter-'
 
 rss:
   <<: *paths

examples/full.chapters.json

@@ -1,13 +1,13 @@
 [
   {
-    "slug": "chapter-1",
+    "slug": "1",
     "title": "Chapter 1",
     "chapters": [
 
     ]
   },
   {
-    "slug": "chapter-2",
+    "slug": "2",
     "title": "Chapter 2",
     "chapters": [
 

examples/full.html

@@ -63,13 +63,13 @@ The Rty
 </div>
 </div>
 </div>
-<h2>Chapter 1</h2>
+<h2 id="chapter-1">Chapter 1</h2>
 <p>
 <span>
 Chapter 1 paragraph text
 </span>
 </p>
-<h2>Chapter 2</h2>
+<h2 id="chapter-2">Chapter 2</h2>
 <p>
 <span>
 Chapter 2 paragraph text

examples/full.repub

@@ -33,7 +33,7 @@ end
 
 
 
-article.chapter 'chapter-1', 'Chapter 1' do |chapter|
+article.chapter '1', 'Chapter 1' do |chapter|
   chapter.paragraph do |paragraph|
     paragraph.text 'Chapter 1 paragraph text'
   end
@@ -41,7 +41,7 @@ end
 
 
 
-article.chapter 'chapter-2', 'Chapter 2' do |chapter|
+article.chapter '2', 'Chapter 2' do |chapter|
   chapter.paragraph do |paragraph|
     paragraph.text 'Chapter 2 paragraph text'
   end

lib/repubmark/config.rb

@@ -4,6 +4,7 @@ module Repubmark
   class Config
     OPTIONAL_KEYS = %i[
       base_url
+      chapter_anchor_prefix
       css_class_annotation
       css_class_blockquote_figure
       css_class_blockquote_blockquote

lib/repubmark/elems/chapter.rb

@@ -118,7 +118,9 @@ module Repubmark
       end
 
       def build_title_html
-        "<h#@level>#@title</h#@level>\n" if @level != 1
+        anchor_prefix = String(config[:chapter_anchor_prefix]).strip
+        anchor = %( id="#{anchor_prefix}#@slug") unless anchor_prefix.empty?
+        "<h#@level#{anchor}>#@title</h#@level>\n" if @level != 1
       end
 
       def build_title_gemtext