Config to toggle the run button on codeblocks

guide/src/format/configuration/renderers.md

@@ -207,13 +207,15 @@ editable = false         # allows editing the source code
 copyable = true          # include the copy button for copying code snippets
 copy-js = true           # includes the JavaScript for the code editor
 line-numbers = false     # displays line numbers for editable code
+runnable = true          # displays a run button for rust code
 ```
 
 - **editable:** Allow editing the source code. Defaults to `false`.
 - **copyable:** Display the copy button on code snippets. Defaults to `true`.
 - **copy-js:** Copy JavaScript files for the editor to the output directory.
   Defaults to `true`.
 - **line-numbers** Display line numbers on editable sections of code. Requires both `editable` and `copy-js` to be `true`. Defaults to `false`.
+- **runnable** Displays a run button for rust code snippets. Changing this to `false` will disable the run in playground feature globally. Defaults to `true`.
 
 [Ace]: https://ace.c9.io/
 

guide/src/format/mdbook.md

@@ -41,7 +41,7 @@ println!("Hello, World!");
 
 If there is no `main` function, then the code is automatically wrapped inside one.
 
-If you wish to disable the play button, you can include the `noplayground` option on the code block like this:
+If you wish to disable the play button for a code block, you can include the `noplayground` option on the code block like this:
 
 ~~~markdown
 ```rust,noplayground
@@ -51,6 +51,13 @@ println!("Hello {}!", name);
 ```
 ~~~
 
+Or, if you wish to disable the play button for all code blocks in your book, you can write the config to the `book.toml` like this.
+
+```toml
+[output.html.playground]
+runnable = false
+```
+
 ## Rust code block attributes
 
 Additional attributes can be included in Rust code blocks with comma, space, or tab-separated terms just after the language term. For example:

src/config.rs

@@ -630,6 +630,8 @@ pub struct Playground {
     pub copy_js: bool,
     /// Display line numbers on playground snippets. Default: `false`.
     pub line_numbers: bool,
+    /// Display the run button. Default: `true`
+    pub runnable: bool,
 }
 
 impl Default for Playground {
@@ -639,6 +641,7 @@ impl Default for Playground {
             copyable: true,
             copy_js: true,
             line_numbers: false,
+            runnable: true,
         }
     }
 }
@@ -781,6 +784,7 @@ mod tests {
             copyable: true,
             copy_js: true,
             line_numbers: false,
+            runnable: true,
         };
         let html_should_be = HtmlConfig {
             curly_quotes: true,
@@ -811,6 +815,22 @@ mod tests {
         assert_eq!(got.html_config().unwrap(), html_should_be);
     }
 
+    #[test]
+    fn disable_runnable() {
+        let src = r#"
+        [book]
+        title = "Some Book"
+        description = "book book book"
+        authors = ["Shogo Takata"]
+
+        [output.html.playground]
+        runnable = false
+        "#;
+
+        let got = Config::from_str(src).unwrap();
+        assert_eq!(got.html_config().unwrap().playground.runnable, false);
+    }
+
     #[test]
     fn edition_2015() {
         let src = r#"

src/renderer/html_handlebars/hbs_renderer.rs

@@ -828,7 +828,8 @@ fn add_playground_pre(
             if classes.contains("language-rust") {
                 if (!classes.contains("ignore")
                     && !classes.contains("noplayground")
-                    && !classes.contains("noplaypen"))
+                    && !classes.contains("noplaypen")
+                    && playground_config.runnable)
                     || classes.contains("mdbook-runnable")
                 {
                     let contains_e2015 = classes.contains("edition2015");

tests/rendered_output.rs

@@ -17,6 +17,7 @@ use std::ffi::OsStr;
 use std::fs;
 use std::io::Write;
 use std::path::{Component, Path, PathBuf};
+use std::str::FromStr;
 use tempfile::Builder as TempFileBuilder;
 use walkdir::{DirEntry, WalkDir};
 
@@ -150,6 +151,25 @@ fn rendered_code_has_playground_stuff() {
     assert_contains_strings(book_js, &[".playground"]);
 }
 
+#[test]
+fn rendered_code_does_not_have_playground_stuff_in_html_when_disabled_in_config() {
+    let temp = DummyBook::new().build().unwrap();
+    let config = Config::from_str(
+        "
+    [output.html.playground]
+    runnable = false
+    ",
+    )
+    .unwrap();
+    let md = MDBook::load_with_config(temp.path(), config).unwrap();
+    md.build().unwrap();
+
+    let nested = temp.path().join("book/first/nested.html");
+    let playground_class = vec![r#"class="playground""#];
+
+    assert_doesnt_contain_strings(nested, &playground_class);
+}
+
 #[test]
 fn anchors_include_text_between_but_not_anchor_comments() {
     let temp = DummyBook::new().build().unwrap();