Rename playpen to playground. (#1241)

looks good

README.md

@@ -148,7 +148,7 @@ preprocessors are:
   all `README.md` chapters to `index.md` so `foo/README.md` can be accessed via
   the url `foo/` when published to a browser
 - `links` - a built-in preprocessor (enabled by default) for expanding the
-  `{{# playpen}}` and `{{# include}}` helpers in a chapter.
+  `{{# playground}}` and `{{# include}}` helpers in a chapter.
 
 Renderers are given the final book so they can do something with it. This is
 typically used for, as the name suggests, rendering the document in a particular

book-example/book.toml

@@ -10,7 +10,7 @@ edition = "2018"
 [output.html]
 mathjax-support = true
 
-[output.html.playpen]
+[output.html.playground]
 editable = true
 line-numbers = true
 

book-example/src/format/config.md

@@ -100,7 +100,7 @@ This controls the build process of your book.
 
 The following preprocessors are available and included by default:
 
-- `links`: Expand the `{{ #playpen }}`, `{{ #include }}`, and `{{ #rustdoc_include }}` handlebars
+- `links`: Expand the `{{ #playground }}`, `{{ #include }}`, and `{{ #rustdoc_include }}` handlebars
   helpers in a chapter to include the contents of a file.
 - `index`: Convert all chapter files named `README.md` into `index.md`. That is
   to say, all `README.md` would be rendered to an index file `index.html` in the
@@ -191,7 +191,7 @@ The following configuration options are available:
   contents column. For example, "1.", "2.1". Set this option to true to disable
   those labels. Defaults to `false`.
 - **fold:** A subtable for configuring sidebar section-folding behavior.
-- **playpen:** A subtable for configuring various playpen settings.
+- **playground:** A subtable for configuring various playground settings.
 - **search:** A subtable for configuring the in-browser search functionality.
   mdBook must be compiled with the `search` feature enabled (on by default).
 - **git-repository-url:**  A url to the git repository for the book. If provided
@@ -212,7 +212,7 @@ Available configuration options for the `[output.html.fold]` table:
 - **level:** The higher the more folded regions are open. When level is 0, all
   folds are closed. Defaults to `0`.
 
-Available configuration options for the `[output.html.playpen]` table:
+Available configuration options for the `[output.html.playground]` table:
 
 - **editable:** Allow editing the source code. Defaults to `false`.
 - **copyable:** Display the copy button on code snippets. Defaults to `true`.
@@ -271,7 +271,7 @@ git-repository-icon = "fa-github"
 enable = false
 level = 0
 
-[output.html.playpen]
+[output.html.playground]
 editable = false
 copy-js = true
 line-numbers = false

book-example/src/format/mdbook.md

@@ -92,17 +92,17 @@ impl System for MySystem { ... }
 Then in the book, all you have to do is:
 ````hbs
 Here is a component:
-```rust,no_run,noplaypen
+```rust,no_run,noplayground
 \{{#include file.rs:component}}
 ```
 
 Here is a system:
-```rust,no_run,noplaypen
+```rust,no_run,noplayground
 \{{#include file.rs:system}}
 ```
 
 This is the full file.
-```rust,no_run,noplaypen
+```rust,no_run,noplayground
 \{{#include file.rs:all}}
 ```
 ````
@@ -178,17 +178,17 @@ That is, it looks like this (click the "expand" icon to see the rest of the file
 With the following syntax, you can insert runnable Rust files into your book:
 
 ```hbs
-\{{#playpen file.rs}}
+\{{#playground file.rs}}
 ```
 
 The path to the Rust file has to be relative from the current source file.
 
-When play is clicked, the code snippet will be sent to the [Rust Playpen] to be
+When play is clicked, the code snippet will be sent to the [Rust Playground] to be
 compiled and run. The result is sent back and displayed directly underneath the
 code.
 
 Here is what a rendered code snippet looks like:
 
-{{#playpen example.rs}}
+{{#playground example.rs}}
 
-[Rust Playpen]: https://play.rust-lang.org/
+[Rust Playground]: https://play.rust-lang.org/

book-example/src/format/theme/editor.md

@@ -1,11 +1,11 @@
 # Editor
 
-In addition to providing runnable code playpens, mdBook optionally allows them
+In addition to providing runnable code playgrounds, mdBook optionally allows them
 to be editable. In order to enable editable code blocks, the following needs to
 be added to the ***book.toml***:
 
 ```toml
-[output.html.playpen]
+[output.html.playground]
 editable = true
 ```
 
@@ -19,7 +19,7 @@ fn main() {
 }
 ```</code></pre>
 
-The above will result in this editable playpen:
+The above will result in this editable playground:
 
 ```rust,editable
 fn main() {
@@ -28,15 +28,15 @@ fn main() {
 }
 ```
 
-Note the new `Undo Changes` button in the editable playpens.
+Note the new `Undo Changes` button in the editable playgrounds.
 
 ## Customizing the Editor
 
 By default, the editor is the [Ace](https://ace.c9.io/) editor, but, if desired,
 the functionality may be overriden by providing a different folder:
 
 ```toml
-[output.html.playpen]
+[output.html.playground]
 editable = true
 editor = "/path/to/editor"
 ```

src/config.rs

@@ -158,7 +158,7 @@ impl Config {
     /// Fetch an arbitrary item from the `Config` as a `toml::Value`.
     ///
     /// You can use dotted indices to access nested items (e.g.
-    /// `output.html.playpen` will fetch the "playpen" out of the html output
+    /// `output.html.playground` will fetch the "playground" out of the html output
     /// table).
     pub fn get(&self, key: &str) -> Option<&Value> {
         self.rest.read(key)
@@ -451,11 +451,11 @@ impl Default for BuildConfig {
     }
 }
 
-/// Configuration for the Rust compiler(e.g., for playpen)
+/// Configuration for the Rust compiler(e.g., for playground)
 #[derive(Debug, Default, Clone, PartialEq, Serialize, Deserialize)]
 #[serde(default, rename_all = "kebab-case")]
 pub struct RustConfig {
-    /// Rust edition used in playpen
+    /// Rust edition used in playground
     pub edition: Option<RustEdition>,
 }
 
@@ -496,8 +496,9 @@ pub struct HtmlConfig {
     pub additional_js: Vec<PathBuf>,
     /// Fold settings.
     pub fold: Fold,
-    /// Playpen settings.
-    pub playpen: Playpen,
+    /// Playground settings.
+    #[serde(alias = "playpen")]
+    pub playground: Playground,
     /// Don't render section labels.
     pub no_section_label: bool,
     /// Search settings. If `None`, the default will be used.
@@ -533,7 +534,7 @@ impl Default for HtmlConfig {
             additional_css: Vec::new(),
             additional_js: Vec::new(),
             fold: Fold::default(),
-            playpen: Playpen::default(),
+            playground: Playground::default(),
             no_section_label: false,
             search: None,
             git_repository_url: None,
@@ -567,24 +568,24 @@ pub struct Fold {
     pub level: u8,
 }
 
-/// Configuration for tweaking how the the HTML renderer handles the playpen.
+/// Configuration for tweaking how the the HTML renderer handles the playground.
 #[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
 #[serde(default, rename_all = "kebab-case")]
-pub struct Playpen {
-    /// Should playpen snippets be editable? Default: `false`.
+pub struct Playground {
+    /// Should playground snippets be editable? Default: `false`.
     pub editable: bool,
     /// Display the copy button. Default: `true`.
     pub copyable: bool,
     /// Copy JavaScript files for the editor to the output directory?
     /// Default: `true`.
     pub copy_js: bool,
-    /// Display line numbers on playpen snippets. Default: `false`.
+    /// Display line numbers on playground snippets. Default: `false`.
     pub line_numbers: bool,
 }
 
-impl Default for Playpen {
-    fn default() -> Playpen {
-        Playpen {
+impl Default for Playground {
+    fn default() -> Playground {
+        Playground {
             editable: false,
             copyable: true,
             copy_js: true,
@@ -694,7 +695,7 @@ mod tests {
         git-repository-url = "https://foo.com/"
         git-repository-icon = "fa-code-fork"
 
-        [output.html.playpen]
+        [output.html.playground]
         editable = true
         editor = "ace"
 
@@ -725,7 +726,7 @@ mod tests {
             use_default_preprocessors: true,
         };
         let rust_should_be = RustConfig { edition: None };
-        let playpen_should_be = Playpen {
+        let playground_should_be = Playground {
             editable: true,
             copyable: true,
             copy_js: true,
@@ -737,7 +738,7 @@ mod tests {
             additional_css: vec![PathBuf::from("./foo/bar/baz.css")],
             theme: Some(PathBuf::from("./themedir")),
             default_theme: Some(String::from("rust")),
-            playpen: playpen_should_be,
+            playground: playground_should_be,
             git_repository_url: Some(String::from("https://foo.com/")),
             git_repository_icon: Some(String::from("fa-code-fork")),
             redirect: vec![
@@ -854,7 +855,7 @@ mod tests {
         // is happy...
         let src = COMPLEX_CONFIG;
         let mut config = Config::from_str(src).unwrap();
-        let key = "output.html.playpen.editable";
+        let key = "output.html.playground.editable";
 
         assert_eq!(config.get(key).unwrap(), &Value::Boolean(true));
         *config.get_mut(key).unwrap() = Value::Boolean(false);