2 files changed, 20 insertions, 15 deletions

diff --git a/lib/backbone/summary.js b/lib/backbone/summary.js
index a1caae7..405c192 100644
--- a/lib/backbone/summary.js
+++ b/lib/backbone/summary.js
@@ -11,29 +11,35 @@ var BackboneFile = require('./file');
 An article represent an entry in the Summary.
 It's defined by a title, a reference, and children articles, the reference (ref) can be a filename + anchor or an external file (optional)
 */
-function TOCArticle(summary, title, ref, articles, parent) {
-    this.summary = summary;
-    this.title = title;
+function TOCArticle(def, parent) {
+    // Title
+    this.title = def.title;
+
+    // Parent TOCPart or TOCArticle
     this.parent = parent;
 
-    if (ref && location.isExternal(ref)) {
+    // As string indicating the overall position
+    // ex: '1.0.0'
+    this.level = def.level;
+
+    if (def.path && location.isExternal(def.path)) {
         throw error.ParsingError(new Error('SUMMARY can only contains relative locations'));
     }
-    if (!title) {
+    if (!def.title) {
         throw error.ParsingError(new Error('SUMMARY entries should have an non-empty title'));
     }
 
-    var parts = url.parse(ref);
-    this.ref = ref;
+    var parts = url.parse(def.path);
+    this.ref = def.path;
 
     if (!this.isExternal()) {
         this.path = parts.pathname;
         this.anchor = parts.hash;
     }
 
-    this.articles = _.map(articles || [], function(article) {
+    this.articles = _.map(def.articles || [], function(article) {
         if (article instanceof TOCArticle) return article;
-        return new TOCArticle(article.title, article.ref, article.articles, this);
+        return new TOCArticle(article, this);
     }, this);
 }
 
@@ -48,6 +54,7 @@ TOCArticle.prototype.walk = function(iter) {
 // Return templating context for an article
 TOCArticle.prototype.getContext = function() {
     return {
+        level: this.level,
         title: this.title,
         path: this.isExternal()? undefined : this.path,
         anchor: this.isExternal()? undefined : this.anchor,
@@ -118,12 +125,9 @@ TOCArticle.prototype.map = function(iter) {
 /*
 A part of a ToC is a composed of a tree of articles.
 */
-function TOCPart(summary, part) {
-    var that = this;
-
-    this.summary = summary;
+function TOCPart(part) {
     this.articles = _.map(part.articles || part.chapters, function(article) {
-        return new TOCArticle(that.summary, article.title, article.path, article.articles, this);
+        return new TOCArticle(article, this);
     }, this);
 }
 
@@ -164,7 +168,7 @@ Summary.prototype.parse = function(content) {
 
     // TODO: update GitBook's parsers to return a list of parts
     .then(function(part) {
-        that.parts = [new TOCPart(that, part)];
+        that.parts = [new TOCPart(part)];
 
         // Update count of articles
         that._length = 0;
diff --git a/lib/page/index.js b/lib/page/index.js
index c92bdfa..51ed2aa 100644
--- a/lib/page/index.js
+++ b/lib/page/index.js
@@ -102,6 +102,7 @@ Page.prototype.getContext = function() {
             title: article? article.title : null,
             next: next? next.getContext() : null,
             previous: prev? prev.getContext() : null,
+            level: article? article.level : null,
             content: this.content
         }
     };