1 files changed, 6 insertions, 0 deletions
diff --git a/lib/backbone/summary.js b/lib/backbone/summary.js
index 439546b..4ae3453 100644
--- a/lib/backbone/summary.js
+++ b/lib/backbone/summary.js
@@ -74,6 +74,7 @@ TOCArticle.prototype.getContext = function() {
     return {
         level: this.level,
         title: this.title,
+        depth: this.depth(),
         path: this.isExternal()? undefined : this.path,
         anchor: this.isExternal()? undefined : this.anchor,
         url: this.isExternal()? this.ref : undefined
@@ -105,6 +106,11 @@ TOCArticle.prototype.hasParent = function() {
     return !(this.parent instanceof TOCPart);
 };
 
+// Return depth of this article
+TOCArticle.prototype.depth = function() {
+    return this.level.split('.').length;
+};
+
 // Return next article in the TOC
 TOCArticle.prototype.next = function() {
     return this._next;