Add tomorrow night as dark code highlighting theme

src/renderer/html_handlebars/hbs_renderer.rs

@@ -179,6 +179,8 @@ impl Renderer for HtmlHandlebars {
         // syntax highlighting
         let mut highlight_css = try!(File::create(book.get_dest().join("highlight.css")));
         try!(highlight_css.write_all(&theme.highlight_css));
+        let mut tomorrow_night_css = try!(File::create(book.get_dest().join("tomorrow-night.css")));
+        try!(tomorrow_night_css.write_all(&theme.tomorrow_night_css));
         let mut highlight_js = try!(File::create(book.get_dest().join("highlight.js")));
         try!(highlight_js.write_all(&theme.highlight_js));
 

src/theme/index.hbs

@@ -16,6 +16,7 @@
         <link rel="stylesheet" href="http://maxcdn.bootstrapcdn.com/font-awesome/4.3.0/css/font-awesome.min.css">
 
         <link rel="stylesheet" href="highlight.css">
+        <link rel="stylesheet" href="tomorrow-night.css">
 
         <!-- MathJax -->
         <script type="text/javascript" src="https://cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML"></script>

src/theme/mod.rs

@@ -8,6 +8,7 @@ pub static INDEX: &'static [u8] = include_bytes!("index.hbs");
 pub static CSS: &'static [u8] = include_bytes!("book.css");
 pub static JS: &'static [u8] = include_bytes!("book.js");
 pub static HIGHLIGHT_JS: &'static [u8] = include_bytes!("highlight.js");
+pub static TOMORROW_NIGHT_CSS: &'static [u8] = include_bytes!("tomorrow-night.css");
 pub static HIGHLIGHT_CSS: &'static [u8] = include_bytes!("highlight.css");
 pub static JQUERY: &'static [u8] = include_bytes!("jquery-2.1.4.min.js");
 pub static FONT_AWESOME: &'static [u8] = include_bytes!("_FontAwesome/css/font-awesome.min.css");
@@ -29,6 +30,7 @@ pub struct Theme {
     pub css: Vec<u8>,
     pub js: Vec<u8>,
     pub highlight_css: Vec<u8>,
+    pub tomorrow_night_css: Vec<u8>,
     pub highlight_js: Vec<u8>,
     pub jquery: Vec<u8>,
 }
@@ -42,6 +44,7 @@ impl Theme {
             css: CSS.to_owned(),
             js: JS.to_owned(),
             highlight_css: HIGHLIGHT_CSS.to_owned(),
+            tomorrow_night_css: TOMORROW_NIGHT_CSS.to_owned(),
             highlight_js: HIGHLIGHT_JS.to_owned(),
             jquery: JQUERY.to_owned(),
         };
@@ -89,6 +92,12 @@ impl Theme {
             let _ = f.read_to_end(&mut theme.highlight_css);
         }
 
+        // tomorrow-night.css
+        if let Ok(mut f) = File::open(&src.join("tomorrow-night.css")) {
+            theme.tomorrow_night_css.clear();
+            let _ = f.read_to_end(&mut theme.tomorrow_night_css);
+        }
+
         theme
     }
 }

src/theme/tomorrow-night.css

@@ -0,0 +1,96 @@
+/* Tomorrow Night Theme */
+/* http://jmblog.github.com/color-themes-for-google-code-highlightjs */
+/* Original theme - https://github.com/chriskempson/tomorrow-theme */
+/* http://jmblog.github.com/color-themes-for-google-code-highlightjs */
+
+/* Tomorrow Comment */
+.hljs-comment {
+  color: #969896;
+}
+
+/* Tomorrow Red */
+.hljs-variable,
+.hljs-attribute,
+.hljs-tag,
+.hljs-regexp,
+.ruby .hljs-constant,
+.xml .hljs-tag .hljs-title,
+.xml .hljs-pi,
+.xml .hljs-doctype,
+.html .hljs-doctype,
+.css .hljs-id,
+.css .hljs-class,
+.css .hljs-pseudo {
+  color: #cc6666;
+}
+
+/* Tomorrow Orange */
+.hljs-number,
+.hljs-preprocessor,
+.hljs-pragma,
+.hljs-built_in,
+.hljs-literal,
+.hljs-params,
+.hljs-constant {
+  color: #de935f;
+}
+
+/* Tomorrow Yellow */
+.ruby .hljs-class .hljs-title,
+.css .hljs-rule .hljs-attribute {
+  color: #f0c674;
+}
+
+/* Tomorrow Green */
+.hljs-string,
+.hljs-value,
+.hljs-inheritance,
+.hljs-header,
+.hljs-name,
+.ruby .hljs-symbol,
+.xml .hljs-cdata {
+  color: #b5bd68;
+}
+
+/* Tomorrow Aqua */
+.hljs-title,
+.css .hljs-hexcolor {
+  color: #8abeb7;
+}
+
+/* Tomorrow Blue */
+.hljs-function,
+.python .hljs-decorator,
+.python .hljs-title,
+.ruby .hljs-function .hljs-title,
+.ruby .hljs-title .hljs-keyword,
+.perl .hljs-sub,
+.javascript .hljs-title,
+.coffeescript .hljs-title {
+  color: #81a2be;
+}
+
+/* Tomorrow Purple */
+.hljs-keyword,
+.javascript .hljs-function {
+  color: #b294bb;
+}
+
+.hljs {
+  display: block;
+  overflow-x: auto;
+  background: #1d1f21;
+  color: #c5c8c6;
+  padding: 0.5em;
+  -webkit-text-size-adjust: none;
+}
+
+.coffeescript .javascript,
+.javascript .xml,
+.tex .hljs-formula,
+.xml .javascript,
+.xml .vbscript,
+.xml .css,
+.xml .hljs-cdata {
+  opacity: 0.5;
+}