Added local fallback for clipboard.js

src/renderer/html_handlebars/hbs_renderer.rs

@@ -171,6 +171,7 @@ impl Renderer for HtmlHandlebars {
         book.write_file("highlight.css", &theme.highlight_css)?;
         book.write_file("tomorrow-night.css", &theme.tomorrow_night_css)?;
         book.write_file("highlight.js", &theme.highlight_js)?;
+        book.write_file("clipboard.min.js", &theme.clipboard_js)?;
         book.write_file("_FontAwesome/css/font-awesome.css", theme::FONT_AWESOME)?;
         book.write_file("_FontAwesome/fonts/fontawesome-webfont.eot", theme::FONT_AWESOME_EOT)?;
         book.write_file("_FontAwesome/fonts/fontawesome-webfont.svg", theme::FONT_AWESOME_SVG)?;

src/theme/index.hbs

@@ -24,8 +24,13 @@
         <!-- MathJax -->
         <script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.1/MathJax.js?config=TeX-AMS-MML_HTMLorMML"></script>
 
-        <!-- Clipboard.js -->
+        <!-- Fetch Clipboard.js from CDN but have a local fallback -->
         <script src="https://cdn.jsdelivr.net/clipboard.js/1.6.1/clipboard.min.js"></script>
+        <script>
+            if (typeof Clipboard == 'undefined') {
+                document.write(unescape("%3Cscript src='clipboard.min.js'%3E%3C/script%3E"));
+            }
+        </script>
 
         <!-- Fetch JQuery from CDN but have a local fallback -->
         <script src="https://code.jquery.com/jquery-2.1.4.min.js"></script>

src/theme/mod.rs

@@ -11,6 +11,7 @@ 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 CLIPBOARD_JS: &'static [u8] = include_bytes!("clipboard.min.js");
 pub static FONT_AWESOME: &'static [u8] = include_bytes!("_FontAwesome/css/font-awesome.min.css");
 pub static FONT_AWESOME_EOT: &'static [u8] = include_bytes!("_FontAwesome/fonts/fontawesome-webfont.eot");
 pub static FONT_AWESOME_SVG: &'static [u8] = include_bytes!("_FontAwesome/fonts/fontawesome-webfont.svg");
@@ -36,6 +37,7 @@ pub struct Theme {
     pub highlight_css: Vec<u8>,
     pub tomorrow_night_css: Vec<u8>,
     pub highlight_js: Vec<u8>,
+    pub clipboard_js: Vec<u8>,
     pub jquery: Vec<u8>,
 }
 
@@ -51,6 +53,7 @@ impl Theme {
             highlight_css: HIGHLIGHT_CSS.to_owned(),
             tomorrow_night_css: TOMORROW_NIGHT_CSS.to_owned(),
             highlight_js: HIGHLIGHT_JS.to_owned(),
+            clipboard_js: CLIPBOARD_JS.to_owned(),
             jquery: JQUERY.to_owned(),
         };
 
@@ -91,6 +94,12 @@ impl Theme {
             let _ = f.read_to_end(&mut theme.highlight_js);
         }
 
+        // clipboard.js
+        if let Ok(mut f) = File::open(&src.join("clipboard.min.js")) {
+            theme.clipboard_js.clear();
+            let _ = f.read_to_end(&mut theme.clipboard_js);
+        }
+
         // highlight.css
         if let Ok(mut f) = File::open(&src.join("highlight.css")) {
             theme.highlight_css.clear();