rust-lang · xrmx · May 12, 2021
diff --git a/guide/src/format/theme/README.md b/guide/src/format/theme/README.md
@@ -14,6 +14,7 @@ Here are the files you can override:
 - **_index.hbs_** is the handlebars template.
 - **_head.hbs_** is appended to the HTML `<head>` section.
 - **_header.hbs_** content is appended on top of every book page.
+- **_before_body_end.hbs_** content is appended before body closing tag.
 - **_css/_** contains the CSS files for styling the book.
     - **_css/chrome.css_** is for UI elements.
     - **_css/general.css_** is the base styles.

diff --git a/src/renderer/html_handlebars/hbs_renderer.rs b/src/renderer/html_handlebars/hbs_renderer.rs
@@ -502,6 +502,9 @@ impl Renderer for HtmlHandlebars {
         debug!("Register the header handlebars template");
         handlebars.register_partial("header", String::from_utf8(theme.header.clone())?)?;
 
+        debug!("Register the before_body_end handlebars template");
+        handlebars.register_partial("before_body_end", String::from_utf8(theme.before_body_end.clone())?)?;
+
         debug!("Register handlebars helpers");
         self.register_hbs_helpers(&mut handlebars, &html_config);
 

diff --git a/src/theme/before_body_end.hbs b/src/theme/before_body_end.hbs
@@ -0,0 +1 @@
+{{!-- Put your before_body_end HTML text here --}}
diff --git a/src/theme/index.hbs b/src/theme/index.hbs
@@ -308,5 +308,7 @@
         {{/if}}
         {{/if}}
 
+        {{> before_body_end}}
+
     </body>
 </html>
diff --git a/src/theme/mod.rs b/src/theme/mod.rs
@@ -17,6 +17,7 @@ pub static INDEX: &[u8] = include_bytes!("index.hbs");
 pub static HEAD: &[u8] = include_bytes!("head.hbs");
 pub static REDIRECT: &[u8] = include_bytes!("redirect.hbs");
 pub static HEADER: &[u8] = include_bytes!("header.hbs");
+pub static BEFORE_BODY_END: &[u8] = include_bytes!("before_body_end.hbs");
 pub static CHROME_CSS: &[u8] = include_bytes!("css/chrome.css");
 pub static GENERAL_CSS: &[u8] = include_bytes!("css/general.css");
 pub static PRINT_CSS: &[u8] = include_bytes!("css/print.css");
@@ -50,6 +51,7 @@ pub struct Theme {
     pub head: Vec<u8>,
     pub redirect: Vec<u8>,
     pub header: Vec<u8>,
+    pub before_body_end: Vec<u8>,
     pub chrome_css: Vec<u8>,
     pub general_css: Vec<u8>,
     pub print_css: Vec<u8>,
@@ -83,6 +85,7 @@ impl Theme {
                 (theme_dir.join("head.hbs"), &mut theme.head),
                 (theme_dir.join("redirect.hbs"), &mut theme.redirect),
                 (theme_dir.join("header.hbs"), &mut theme.header),
+                (theme_dir.join("before_body_end.hbs"), &mut theme.before_body_end),
                 (theme_dir.join("book.js"), &mut theme.js),
                 (theme_dir.join("css/chrome.css"), &mut theme.chrome_css),
                 (theme_dir.join("css/general.css"), &mut theme.general_css),
@@ -149,6 +152,7 @@ impl Default for Theme {
             head: HEAD.to_owned(),
             redirect: REDIRECT.to_owned(),
             header: HEADER.to_owned(),
+            before_body_end: BEFORE_BODY_END.to_owned(),
             chrome_css: CHROME_CSS.to_owned(),
             general_css: GENERAL_CSS.to_owned(),
             print_css: PRINT_CSS.to_owned(),
@@ -206,6 +210,7 @@ mod tests {
             "head.hbs",
             "redirect.hbs",
             "header.hbs",
+            "before_body_end.hbs",
             "favicon.png",
             "favicon.svg",
             "css/chrome.css",
@@ -236,6 +241,7 @@ mod tests {
             head: Vec::new(),
             redirect: Vec::new(),
             header: Vec::new(),
+            before_body_end: Vec::new(),
             chrome_css: Vec::new(),
             general_css: Vec::new(),
             print_css: Vec::new(),
Original file line number	Diff line number	Diff line change
		@@ -0,0 +1 @@
		{{!-- Put your before_body_end HTML text here --}}
-Original file line number
+Diff line change
@@ Expand Up / @@ -308,5 +308,7 @@ @@
             {{/if}}
             {{/if}}
+            {{> before_body_end}}
         </body>
     </html>