more simple language declaration in book.toml

src/book/bookconfig.rs

@@ -109,7 +109,9 @@ impl BookConfig {
     /// name = "Marcus Aurelius Antoninus"
     /// ```
     ///
-    pub fn parse_from_btreemap(&mut self, config: &BTreeMap<String, toml::Value>) -> &mut Self {
+    pub fn parse_from_btreemap(&mut self,
+                               default_language_code: String,
+                               config: &BTreeMap<String, toml::Value>) -> &mut Self {
 
         // Paths
 
@@ -134,6 +136,8 @@ impl BookConfig {
                 .collect::<Vec<Author>>()
         };
 
+        self.language = Language::new(&default_language_code);
+
         if let Some(a) = config.get("title") {
             self.title = a.to_string().replace("\"", "");
         }
@@ -152,6 +156,14 @@ impl BookConfig {
             }
         }
 
+        if let Some(a) = config.get("language_code") {
+            self.language.code = a.to_string().replace("\"", "");
+        }
+
+        if let Some(a) = config.get("language_name") {
+            self.language.name = Some(a.to_string().replace("\"", ""));
+        }
+
         // Author name as a hash key.
         if let Some(a) = config.get("author") {
             if let Some(b) = a.as_str() {
@@ -286,24 +298,31 @@ impl From<toml::Table> for Author {
 
 #[derive(Debug, Clone)]
 pub struct Language {
-    pub name: String,
     pub code: String,
+    pub name: Option<String>,
 }
 
 impl Default for Language {
     fn default() -> Self {
         Language {
-            name: String::from("English"),
             code: String::from("en"),
+            name: Some(String::from("English")),
         }
     }
 }
 
 impl Language {
-    pub fn new(name: &str, code: &str) -> Language {
+    pub fn new(code: &str) -> Language {
         Language{
-            name: name.to_string(),
             code: code.to_string(),
+            name: None,
+        }
+    }
+
+    pub fn new_with_name(code: &str, name: &str) -> Language {
+        Language{
+            code: code.to_string(),
+            name: Some(name.to_string()),
         }
     }
 }
@@ -311,12 +330,14 @@ impl Language {
 impl From<toml::Table> for Language {
     fn from(data: toml::Table) -> Language {
         let mut language = Language::default();
-        if let Some(x) = data.get("name") {
-            language.name = x.to_string().replace("\"", "");
-        }
         if let Some(x) = data.get("code") {
             language.code = x.to_string().replace("\"", "");
         }
+        if let Some(x) = data.get("name") {
+            language.name = Some(x.to_string().replace("\"", ""));
+        } else {
+            language.name = None;
+        }
         language
     }
 }

src/book/mod.rs

@@ -321,7 +321,10 @@ impl MDBook {
                                 book.config.dest = book.config.dest.join(key);
                             }
                             book.config.is_multilang = is_multilang;
-                            book.config.parse_from_btreemap(&d);
+                            book.config.parse_from_btreemap(key.to_owned(), &d);
+                            // the language code and translation key must agree
+                            // even after parsing the user's settings
+                            book.config.language.code = key.to_owned();
                             if book.config.is_main_book {
                                 has_main_book_already = true;
                             }
@@ -379,7 +382,8 @@ impl MDBook {
         } else {
             let mut book = Book::new(&self.project_root);
 
-            book.config.parse_from_btreemap(&config);
+            // take "en" as default code, will override if user sets it
+            book.config.parse_from_btreemap("en".to_owned(), &config);
             let key = book.config.language.code.clone();
             self.translations.insert(key, book);
         }

src/renderer/html_handlebars/hbs_renderer.rs

@@ -356,7 +356,7 @@ fn make_data(book: &Book,
 
     // Book data
 
-    data.insert("language".to_owned(), "en".to_json());
+    data.insert("language".to_owned(), book.config.language.code.to_json());
     data.insert("page-title".to_owned(), format!("{} - {}", chapter.title, book.config.title).to_json());
     data.insert("chapter-title".to_owned(), chapter.title.to_json());
     data.insert("description".to_owned(), book.config.description.to_json());

src/tests/book-wonderland-multilang/book.toml

@@ -1,16 +1,19 @@
 # Source: https://en.wikisource.org/wiki/Alice%27s_Adventures_in_Wonderland_(1866)"
 
+# The language code will be the translation key.
+
 [[translations.en]]
 title = "Alice's Adventures in Wonderland"
 author = "Lewis Carroll"
-language = { name = "English", code = "en" }
 
 [[translations.fr]]
 title = "Alice au pays des merveilles"
 author = "Lewis Carroll"
-language = { name = "Français", code = "fr" }
+
+# Optionally you can provide the language name.
+
+language_name = "Français"
 
 [[translations.hu]]
 title = "Alice Csodaországban"
 author = "Lewis Carroll"
-language = { name = "Magyar", code = "hu" }

src/tests/hbs_renderer_multilang.rs

@@ -35,6 +35,7 @@ fn it_renders_multilanguage_book() {
 
     chapter_path = book_path.join("tears.html");
     s = utils::fs::file_to_string(&chapter_path).unwrap();
+    assert!(s.contains("<html lang=\"en\">"));
     assert!(s.contains("<h1>The Pool of Tears</h1>"));
     assert!(s.contains("<base href=\"../\">"));
     assert!(s.contains("li><a href=\"en/tears.html\" class=\"active\"><strong>2.</strong> The Pool of Tears</a></li>"));
@@ -42,12 +43,14 @@ fn it_renders_multilanguage_book() {
     book_path = proj.translations.get("fr").unwrap().config.get_dest();
     chapter_path = book_path.join("tears.html");
     s = utils::fs::file_to_string(&chapter_path).unwrap();
+    assert!(s.contains("<html lang=\"fr\">"));
     assert!(s.contains("<h1>La mare aux larmes</h1>"));
     assert!(s.contains("<base href=\"../\">"));
 
     book_path = proj.translations.get("hu").unwrap().config.get_dest();
     chapter_path = book_path.join("tears.html");
     s = utils::fs::file_to_string(&chapter_path).unwrap();
+    assert!(s.contains("<html lang=\"hu\">"));
     assert!(s.contains("<h1>Könnytó</h1>"));
     assert!(s.contains("<base href=\"../\">"));
 

src/tests/mdbook_test.rs

@@ -10,8 +10,7 @@ use serde_json;
 use utils;
 use book::MDBook;
 use book::book::Book;
-use book::bookconfig::BookConfig;
-use book::bookconfig::Author;
+use book::bookconfig::{BookConfig, Author, Language};
 use book::chapter::Chapter;
 use book::toc::{TocItem, TocContent};
 
@@ -36,6 +35,7 @@ fn it_parses_simple_json_config() {
         book.config.title =  "mdBook Documentation".to_string();
         book.config.description =  Some("Create books from markdown files.".to_string());
         book.config.authors = vec![Author::new("Mathieu David")];
+        book.config.language = Language::new("en");
 
         expected.translations.insert("en".to_string(), book);
     }
@@ -63,6 +63,7 @@ author = "Mathieu David"
         book.config.title =  "mdBook Documentation".to_string();
         book.config.description =  Some("Create books from markdown files.".to_string());
         book.config.authors = vec![Author::new("Mathieu David")];
+        book.config.language = Language::new("en");
 
         expected.translations.insert("en".to_string(), book);
     }
@@ -92,6 +93,7 @@ name = "Mathieu David"
         book.config.title =  "mdBook Documentation".to_string();
         book.config.description =  Some("Create books from markdown files.".to_string());
         book.config.authors = vec![Author::new("Mathieu David")];
+        book.config.language = Language::new("en");
 
         expected.translations.insert("en".to_string(), book);
     }
@@ -144,6 +146,7 @@ name = "Kosztolányi Dezső"
         conf.dest = expected.get_project_root().join("book").join("en");
         conf.is_multilang = true;
         conf.is_main_book = true;
+        conf.language = Language::new("en");
 
         let mut book = Book::default();
         book.config = conf;
@@ -160,6 +163,7 @@ name = "Kosztolányi Dezső"
         conf.dest = expected.get_project_root().join("book").join("hu");
         conf.is_multilang = true;
         conf.is_main_book = false;
+        conf.language = Language::new("hu");
 
         let mut book = Book::default();
         book.config = conf;
@@ -219,7 +223,7 @@ name = "Kosztolányi Dezső"
         book.config.title = "Alice Csodaországban".to_string();
         book.config.authors = vec![Author::new("Lewis Carroll")];
         book.config.translators = Some(vec![Author::new("Kosztolányi Dezső")]);
-        book.config.language.name = "Hungarian".to_string();
+        book.config.language.name = Some("Hungarian".to_string());
         book.config.language.code = "hu".to_string();
 
         expected.translations.insert("hu".to_string(), book);