feat(toc_helper): add min_depth option

Author: SukkaW

lib/plugins/helper/toc.js

@@ -4,12 +4,13 @@ const { tocObj } = require('hexo-util');
 
 function tocHelper(str, options = {}) {
   options = Object.assign({
+    min_depth: 1,
     max_depth: 6,
     class: 'toc',
     list_number: true
   }, options);
 
-  const data = tocObj(str, { max_depth: options.max_depth });
+  const data = tocObj(str, { min_depth: options.min_depth, max_depth: options.max_depth });
 
   if (!data.length) return '';
 

test/scripts/helpers/toc.js

@@ -311,4 +311,54 @@ describe('toc', () => {
 
     toc(html, { max_depth: 2 }).should.eql(expected);
   });
+
+  it('min_depth', () => {
+    const className = 'toc';
+    const expected = [
+      '<ol class="' + className + '">',
+      '<li class="' + className + '-item toc-level-2">',
+      '<a class="' + className + '-link" href="#title_1_1">',
+      '<span class="' + className + '-number">1.</span> ',
+      '<span class="' + className + '-text">Title 1.1</span>',
+      '</a>',
+      '<ol class="' + className + '-child">',
+      '<li class="' + className + '-item toc-level-3">',
+      '<a class="' + className + '-link" href="#title_1_1_1">',
+      '<span class="' + className + '-number">1.1.</span> ',
+      '<span class="' + className + '-text">Title 1.1.1</span>',
+      '</a>',
+      '</li>',
+      '</ol>',
+      '</li>',
+      '<li class="' + className + '-item toc-level-2">',
+      '<a class="' + className + '-link" href="#title_1_2">',
+      '<span class="' + className + '-number">2.</span> ',
+      '<span class="' + className + '-text">Title 1.2</span>',
+      '</a>',
+      '</li>',
+      '<li class="' + className + '-item toc-level-2">',
+      '<a class="' + className + '-link" href="#title_1_3">',
+      '<span class="' + className + '-number">3.</span> ',
+      '<span class="' + className + '-text">Title 1.3</span>',
+      '</a>',
+      '<ol class="' + className + '-child">',
+      '<li class="' + className + '-item toc-level-3">',
+      '<a class="' + className + '-link" href="#title_1_3_1">',
+      '<span class="' + className + '-number">3.1.</span> ',
+      '<span class="' + className + '-text">Title 1.3.1</span>',
+      '</a>',
+      '</li>',
+      '</ol>',
+      '</li>',
+      '<li class="' + className + '-item toc-level-2">',
+      '<a class="' + className + '-link" href="#title_2_1">',
+      '<span class="' + className + '-number">4.</span> ',
+      '<span class="' + className + '-text">Title 2.1</span>',
+      '</a>',
+      '</li>',
+      '</ol>'
+    ].join('');
+
+    toc(html, { min_depth: 2 }).should.eql(expected);
+  });
 });