From 0620ef1f472e8242bfa411dba207d15b46a1e29f Mon Sep 17 00:00:00 2001
From: Mathieu David <mathieudavid@mathieudavid.org>
Date: Tue, 29 Dec 2015 12:26:32 +0100
Subject: [PATCH] Hides rust code lines prepended with #

---
 src/theme/book.css            |  3 +++
 src/theme/book.js             | 11 +++++++++--
 src/theme/stylus/general.styl |  4 ++++
 3 files changed, 16 insertions(+), 2 deletions(-)

diff --git a/src/theme/book.css b/src/theme/book.css
index c73eb4a0..df72378b 100644
--- a/src/theme/book.css
+++ b/src/theme/book.css
@@ -9,6 +9,9 @@ body {
 .right {
   float: right;
 }
+.hidden {
+  display: none;
+}
 h2,
 h3 {
   margin-top: 2.5em;
diff --git a/src/theme/book.js b/src/theme/book.js
index 862cb324..b4809118 100644
--- a/src/theme/book.js
+++ b/src/theme/book.js
@@ -119,13 +119,20 @@ $( document ).ready(function() {
 
     $("code.language-rust").each(function(i, block){
         var lines = $(this).html().split("\n");
+        var first_non_hidden_line = false;
 
         for(var n = 0; n < lines.length; n++){
             if($.trim(lines[n])[0] == hiding_character){
-                lines[n] = "<span class=\"hidden\">" + lines[n] + "</span>"
+                lines[n] = "<span class=\"hidden\">" + lines[n] + "</span>";
+            }
+            else if(first_non_hidden_line) {
+                lines[n] = "\n" + lines[n];
+            }
+            else {
+                first_non_hidden_line = true;
             }
         }
-        $(this).html(lines.join());
+        $(this).html(lines.join(""));
     });
 
 
diff --git a/src/theme/stylus/general.styl b/src/theme/stylus/general.styl
index 13f616f6..e798e8e0 100644
--- a/src/theme/stylus/general.styl
+++ b/src/theme/stylus/general.styl
@@ -11,4 +11,8 @@ html, body {
     float: right
 }
 
+.hidden {
+    display: none;
+}
+
 h2, h3 { margin-top: 2.5em }