Add support for localisation in generated files

lang/en.yaml

@@ -0,0 +1,4 @@
+menu: Menu
+
+display_all: Display all chapters
+display_one: Display one chapter

lang/fr.yaml

@@ -0,0 +1,4 @@
+menu: Menu
+
+display_all: Afficher tous les chapitres
+display_one: "N'afficher qu'un chapitre"

src/lib/html.rs

@@ -24,6 +24,7 @@ use toc::Toc;
 use resource_handler::ResourceHandler;
 use std::borrow::Cow;
 use templates::html;
+use lang::localize;
 
 use mustache;
 use rustc_serialize::base64::{self, ToBase64};
@@ -206,6 +207,10 @@ impl<'a> HtmlRenderer<'a> {
             .insert_str("book_svg", &book_svg)
             .insert_str("pages_svg", &pages_svg)
             .insert_bool("display_chapter", self.book.options.get_bool("html.display_chapter").unwrap())
+            .insert_str("loc_display_one", localize(self.book.options.get_str("lang").unwrap(),
+                                                          "display_one"))
+            .insert_str("loc_display_all", localize(self.book.options.get_str("lang").unwrap(),
+                                                          "display_all"))
             .build();
         let mut res:Vec<u8> = vec!();
         template_js.render_data(&mut res, &data);
@@ -223,6 +228,10 @@ impl<'a> HtmlRenderer<'a> {
             .insert_str("menu_svg", menu_svg)
             .insert_str("book_svg", book_svg)
             .insert_str("pages_svg", pages_svg)
+            .insert_str("loc_display_one", localize(self.book.options.get_str("lang").unwrap(),
+                                                          "display_one"))
+            .insert_str("loc_display_all", localize(self.book.options.get_str("lang").unwrap(),
+                                                          "display_all"))
             .build();
         let template = mustache::compile_str(try!(self.book.get_template("html.template")).as_ref());        
         let mut res = vec!();

src/lib/lang.rs

@@ -0,0 +1,18 @@
+use yaml_rust::{YamlLoader, Yaml};
+
+static EN:&'static str = include_str!("../../lang/en.yaml");
+static FR:&'static str = include_str!("../../lang/fr.yaml");
+
+/// Localize a string in a given language
+pub fn localize(lang: &str, s: &str) -> String {
+    let docs = match lang {
+        "fr" => YamlLoader::load_from_str(FR).unwrap(),
+        _ => YamlLoader::load_from_str(EN).unwrap(),
+    };
+    let hash = docs[0].as_hash().unwrap();
+
+    String::from(hash.get(&Yaml::from_str(s))
+                 .unwrap()
+                 .as_str()
+                 .unwrap())
+}

src/lib/lib.rs

@@ -136,6 +136,7 @@ mod number;
 mod resource_handler;
 mod logger;
 mod bookoptions;
+mod lang;
 
 mod escape;
 mod toc;

templates/script.js

@@ -47,15 +47,15 @@ function switchAll() {
         }
         displayAllSwitcher = document.getElementById("book-button");
         displayAllSwitcher.src="{{{pages_svg}}}";
-        displayAllSwitcher.alt="Display one chapter";
-        displayAllSwitcher.title="Display one chapter";
+        displayAllSwitcher.alt="{{{loc_display_one}}}";
+        displayAllSwitcher.title="{{{loc_display_one}}}";
     }else{
         displayAll = false;
         showChapter(0);
         displayAllSwitcher = document.getElementById("book-button");
         displayAllSwitcher.src="{{{book_svg}}}";
-        displayAllSwitcher.alt="Display all chapters";
-        displayAllSwitcher.title="Display all chapters";
+        displayAllSwitcher.alt="{{{loc_display_all}}}";
+        displayAllSwitcher.title="{{{loc_display_all}}}";
     }
 }
 

templates/template.html

@@ -22,7 +22,7 @@
     <nav id = "nav">
       <div id="toolbar">
         <img id="book-button" alt="Display mode"
-             title = "Display all chapters"
+             title = "{{{loc_display_all}}}"
              src="{{{book_svg}}}"
              onclick="javascript:switchAll()">
       </div>