add modifyAnchors option (#24)

* add modifyAnchors option

* fix small bug and add tests for new feature

* fix style problem

README.md

@@ -26,6 +26,7 @@ marked:
   breaks: true
   smartLists: true
   smartypants: true
+  modifyAnchors: ''
 ```
 
 - **gfm** - Enables [GitHub flavored markdown](https://help.github.com/articles/github-flavored-markdown)
@@ -35,6 +36,7 @@ marked:
 - **breaks** - Enable GFM [line breaks](https://help.github.com/articles/github-flavored-markdown#newlines). This option requires the `gfm` option to be true.
 - **smartLists** - Use smarter list behavior than the original markdown.
 - **smartypants** - Use "smart" typograhic punctuation for things like quotes and dashes.
+- **modifyAnchors** - Use for transform anchorIds. if 1 to lowerCase and if 2 to upperCase.
 
 [Markdown]: http://daringfireball.net/projects/markdown/
 [marked]: https://github.com/chjj/marked

index.js

@@ -12,7 +12,8 @@ hexo.config.marked = assign({
   tables: true,
   breaks: true,
   smartLists: true,
-  smartypants: true
+  smartypants: true,
+  modifyAnchors: ''
 }, hexo.config.marked);
 
 hexo.extend.renderer.register('md', 'html', renderer, true);

lib/renderer.js

@@ -19,7 +19,8 @@ require('util').inherits(Renderer, MarkedRenderer);
 
 // Add id attribute to headings
 Renderer.prototype.heading = function(text, level) {
-  var id = anchorId(stripHTML(text));
+  var transformOption = this.options.modifyAnchors;
+  var id = anchorId(stripHTML(text), transformOption);
   var headingId = this._headingId;
 
   // Add a number after id if repeated
@@ -32,8 +33,8 @@ Renderer.prototype.heading = function(text, level) {
   return '<h' + level + ' id="' + id + '"><a href="#' + id + '" class="headerlink" title="' + stripHTML(text) + '"></a>' + text + '</h' + level + '>';
 };
 
-function anchorId(str) {
-  return util.slugize(str.trim());
+function anchorId(str, transformOption) {
+  return util.slugize(str.trim(), {transform: transformOption});
 }
 
 marked.setOptions({

test/index.js

@@ -58,4 +58,60 @@ describe('Marked renderer', function() {
 
     result.should.eql('<h1 id="中文"><a href="#中文" class="headerlink" title="中文"></a>中文</h1>');
   });
+
+  describe('modifyAnchors option tests', function() {
+    var body = [
+      '- [Example](#example)',
+      '',
+      '# Example'
+    ].join('\n');
+
+    var renderer = require('../lib/renderer');
+
+    var ctx = {
+      config: {
+        marked: {
+          modifyAnchors: ''
+        }
+      }
+    };
+
+    it('should not modify anchors with default options', function() {
+      var r = renderer.bind(ctx);
+      var result = r({text: body});
+
+      result.should.eql([
+        '<ul>',
+        '<li><a href=\"#example\">Example</a></li>',
+        '</ul>',
+        '<h1 id=\"Example\"><a href=\"#Example\" class=\"headerlink\" title=\"Example\"></a>Example</h1>'
+      ].join('\n'));
+    });
+
+    it('should set anchors to upperCase in case of modifyAnchors option is 2', function() {
+      ctx.config.marked.modifyAnchors = 2;
+      var r = renderer.bind(ctx);
+      var result = r({text: body});
+
+      result.should.eql([
+        '<ul>',
+        '<li><a href=\"#example\">Example</a></li>',
+        '</ul>',
+        '<h1 id=\"EXAMPLE\"><a href=\"#EXAMPLE\" class=\"headerlink\" title=\"Example\"></a>Example</h1>'
+      ].join('\n'));
+    });
+
+    it('should set anchors to lowerCase in case of modifyAnchors option is 1', function() {
+      ctx.config.marked.modifyAnchors = 1;
+      var r = renderer.bind(ctx);
+      var result = r({text: body});
+
+      result.should.eql([
+        '<ul>',
+        '<li><a href=\"#example\">Example</a></li>',
+        '</ul>',
+        '<h1 id=\"example\"><a href=\"#example\" class=\"headerlink\" title=\"Example\"></a>Example</h1>'
+      ].join('\n'));
+    });
+  });
 });