1 files changed, 151 insertions, 0 deletions
diff --git a/browser/extensions/pdfjs/content/web/l10n.js b/browser/extensions/pdfjs/content/web/l10n.js
new file mode 100644
index 000000000..2e0684e06
--- /dev/null
+++ b/browser/extensions/pdfjs/content/web/l10n.js
@@ -0,0 +1,151 @@
+
+'use strict';
+
+// Small subset of the webL10n API by Fabien Cazenave for pdf.js extension.
+(function(window) {
+  var gLanguage = '';
+  var gExternalLocalizerServices = null;
+
+  // fetch an l10n objects
+  function getL10nData(key) {
+    var response = gExternalLocalizerServices.getStrings(key);
+    var data = JSON.parse(response);
+    if (!data) {
+      console.warn('[l10n] #' + key + ' missing for [' + gLanguage + ']');
+    }
+    return data;
+  }
+
+  // replace {{arguments}} with their values
+  function substArguments(text, args) {
+    if (!args) {
+      return text;
+    }
+    return text.replace(/\{\{\s*(\w+)\s*\}\}/g, function(all, name) {
+      return (name in args ? args[name] : '{{' + name + '}}');
+    });
+  }
+
+  // translate a string
+  function translateString(key, args, fallback) {
+    var i = key.lastIndexOf('.');
+    var name, property;
+    if (i >= 0) {
+      name = key.substring(0, i);
+      property = key.substring(i + 1);
+    } else {
+      name = key;
+      property = 'textContent';
+    }
+    var data = getL10nData(name);
+    var value = (data && data[property]) || fallback;
+    if (!value) {
+      return '{{' + key + '}}';
+    }
+    return substArguments(value, args);
+  }
+
+  // translate an HTML element
+  function translateElement(element) {
+    if (!element || !element.dataset) {
+      return;
+    }
+
+    // get the related l10n object
+    var key = element.dataset.l10nId;
+    var data = getL10nData(key);
+    if (!data) {
+      return;
+    }
+
+    // get arguments (if any)
+    // TODO: more flexible parser?
+    var args;
+    if (element.dataset.l10nArgs) {
+      try {
+        args = JSON.parse(element.dataset.l10nArgs);
+      } catch (e) {
+        console.warn('[l10n] could not parse arguments for #' + key + '');
+      }
+    }
+
+    // translate element
+    // TODO: security check?
+    for (var k in data) {
+      element[k] = substArguments(data[k], args);
+    }
+  }
+
+
+  // translate an HTML subtree
+  function translateFragment(element) {
+    element = element || document.querySelector('html');
+
+    // check all translatable children (= w/ a `data-l10n-id' attribute)
+    var children = element.querySelectorAll('*[data-l10n-id]');
+    var elementCount = children.length;
+    for (var i = 0; i < elementCount; i++) {
+      translateElement(children[i]);
+    }
+
+    // translate element itself if necessary
+    if (element.dataset.l10nId) {
+      translateElement(element);
+    }
+  }
+
+  function translateDocument() {
+    gLanguage = gExternalLocalizerServices.getLocale();
+
+    translateFragment();
+
+    // fire a 'localized' DOM event
+    var evtObject = document.createEvent('Event');
+    evtObject.initEvent('localized', false, false);
+    evtObject.language = gLanguage;
+    window.dispatchEvent(evtObject);
+  }
+
+  window.addEventListener('DOMContentLoaded', function() {
+    if (gExternalLocalizerServices) {
+      translateDocument();
+    }
+    // ... else see setExternalLocalizerServices below
+  });
+
+  // Public API
+  document.mozL10n = {
+    // get a localized string
+    get: translateString,
+
+    // get the document language
+    getLanguage: function() {
+      return gLanguage;
+    },
+
+    // get the direction (ltr|rtl) of the current language
+    getDirection: function() {
+      // http://www.w3.org/International/questions/qa-scripts
+      // Arabic, Hebrew, Farsi, Pashto, Urdu
+      var rtlList = ['ar', 'he', 'fa', 'ps', 'ur'];
+
+      // use the short language code for "full" codes like 'ar-sa' (issue 5440)
+      var shortCode = gLanguage.split('-')[0];
+
+      return (rtlList.indexOf(shortCode) >= 0) ? 'rtl' : 'ltr';
+    },
+
+    setExternalLocalizerServices: function (externalLocalizerServices) {
+      gExternalLocalizerServices = externalLocalizerServices;
+
+      // ... in case if we missed DOMContentLoaded above.
+      if (window.document.readyState === 'interactive' ||
+          window.document.readyState === 'complete') {
+        translateDocument();
+      }
+    },
+
+    // translate an element or document fragment
+    translate: translateFragment
+  };
+})(this);