For #17 support to do list

- support [ ]
- support [x]

need to change the style and allow config class

doc/README.md

@@ -26,6 +26,11 @@ var y = 3
 | ---- | ---- | ------- |
 | id   | int  | test    |
 
+#### I am check list
+
+- [ ] a
+- [x] b
+
 ## Contribute
 
 make a pr, and then ...

lib/renderer/toc-renderer.js

@@ -18,4 +18,16 @@ TocRenderer.prototype.heading = function (text, level) {
     return '<h' + level + ' id="' + text + '">' + text + '</h' + level + '>';
 };
 
+// TODO: move the to do list render to another file
+TocRenderer.prototype.listitem = function(text) {
+    if (/^\s*\[[x ]\]\s*/.test(text)) {
+        text = text
+            .replace(/^\s*\[ \]\s*/, '<input type="checkbox" disabled>')
+            .replace(/^\s*\[x\]\s*/, '<input type="checkbox" checked disabled>');
+        return '<li class="check-list-item">' + text + '</li>';
+    } else {
+        return '<li>' + text + '</li>';
+    }
+};
+
 module.exports = TocRenderer;