It's now possible to use a custom theme. Add a theme directory in your src and selectively overwrite the files you want to customize. Closes #6

src/renderer/html_handlebars/hbs_renderer.rs

@@ -2,10 +2,10 @@ extern crate handlebars;
 extern crate rustc_serialize;
 extern crate pulldown_cmark;
 
-use renderer::html_handlebars::helpers;
+use renderer::html_handlebars::{helpers, theme};
 use renderer::Renderer;
 use book::{BookItems, BookConfig};
-use {theme, utils};
+use utils;
 
 use std::path::PathBuf;
 use std::fs::{self, File};
@@ -30,12 +30,12 @@ impl Renderer for HtmlHandlebars {
         debug!("[fn]: render");
         let mut handlebars = Handlebars::new();
 
-        // Load template
-        let t = theme::get_index_hbs();
+        // Load theme
+        let theme = theme::Theme::new(&config.src());
 
         // Register template
         debug!("[*]: Register handlebars template");
-        try!(handlebars.register_template_string("index", t.to_owned()));
+        try!(handlebars.register_template_string("index", theme.index.to_owned()));
 
         // Register helpers
         debug!("[*]: Register handlebars helpers");
@@ -115,11 +115,11 @@ impl Renderer for HtmlHandlebars {
         debug!("[*] Copy static files");
         // JavaScript
         let mut js_file = try!(File::create(config.dest().join("book.js")));
-        try!(js_file.write_all(theme::get_js()));
+        try!(js_file.write_all(&theme.js));
 
         // Css
         let mut css_file = try!(File::create(config.dest().join("book.css")));
-        try!(css_file.write_all(theme::get_css()));
+        try!(css_file.write_all(&theme.css));
 
         Ok(())
     }

src/renderer/html_handlebars/mod.rs

@@ -2,3 +2,4 @@ pub use self::hbs_renderer::HtmlHandlebars;
 
 mod hbs_renderer;
 mod helpers;
+mod theme;

src/renderer/html_handlebars/theme.rs

@@ -0,0 +1,73 @@
+use std::path::Path;
+use std::fs::{File, metadata};
+use std::io::Read;
+use theme;
+
+pub struct Theme {
+    pub index: String,
+    pub css: Vec<u8>,
+    pub js: Vec<u8>,
+}
+
+impl Theme {
+    pub fn new(src: &Path) -> Self{
+
+        // Default theme
+        let mut theme = Theme {
+            index: theme::get_index_hbs().to_owned(),
+            css: theme::get_css().to_owned(),
+            js: theme::get_js().to_owned(),
+        };
+
+        // Check if the given path exists
+        // Hacky way to check if the path exists... Until PathExt moves to stable
+        match metadata(&src) {
+            Err(_) => return theme,
+            Ok(f) => {
+                if !f.is_dir() {
+                    return theme;
+                }
+            },
+        }
+
+        let src = src.join("theme");
+        // If src does exist, check if there is a theme directory in it
+        // Hacky way to check if the path exists... Until PathExt moves to stable
+        match metadata(&src) {
+            Err(_) => return theme,
+            Ok(f) => {
+                if !f.is_dir() {
+                    return theme;
+                }
+            }
+        }
+
+        // Check for individual files if they exist
+
+        // index.hbs
+        match File::open(&src.join("index.hbs")) {
+            Ok(mut f) => {
+                f.read_to_string(&mut theme.index).unwrap();
+            },
+            _ => {},
+        }
+
+        // book.js
+        match File::open(&src.join("book.js")) {
+            Ok(mut f) => {
+                f.read_to_end(&mut theme.js).unwrap();
+            },
+            _ => {},
+        }
+
+        // book.css
+        match File::open(&src.join("book.css")) {
+            Ok(mut f) => {
+                f.read_to_end(&mut theme.css).unwrap();
+            },
+            _ => {},
+        }
+
+        theme
+    }
+}