8 files changed, 819 insertions, 0 deletions
diff --git a/addon-sdk/source/lib/sdk/l10n/core.js b/addon-sdk/source/lib/sdk/l10n/core.js
new file mode 100644
index 000000000..2f8f84c04
--- /dev/null
+++ b/addon-sdk/source/lib/sdk/l10n/core.js
@@ -0,0 +1,9 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+"use strict";
+
+const json = require("./json/core");
+const properties = require("./properties/core");
+
+exports.get = json.usingJSON ? json.get : properties.get;
diff --git a/addon-sdk/source/lib/sdk/l10n/html.js b/addon-sdk/source/lib/sdk/l10n/html.js
new file mode 100644
index 000000000..fa2cf9cf0
--- /dev/null
+++ b/addon-sdk/source/lib/sdk/l10n/html.js
@@ -0,0 +1,32 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+"use strict";
+
+module.metadata = {
+  "stability": "unstable"
+};
+
+const { processes, remoteRequire } = require("../remote/parent");
+remoteRequire("sdk/content/l10n-html");
+
+var enabled = false;
+function enable() {
+  if (!enabled) {
+    processes.port.emit("sdk/l10n/html/enable");
+    enabled = true;
+  }
+}
+exports.enable = enable;
+
+function disable() {
+  if (enabled) {
+    processes.port.emit("sdk/l10n/html/disable");
+    enabled = false;
+  }
+}
+exports.disable = disable;
+
+processes.forEvery(process => {
+  process.port.emit(enabled ? "sdk/l10n/html/enable" : "sdk/l10n/html/disable");
+});
diff --git a/addon-sdk/source/lib/sdk/l10n/json/core.js b/addon-sdk/source/lib/sdk/l10n/json/core.js
new file mode 100644
index 000000000..af52f956f
--- /dev/null
+++ b/addon-sdk/source/lib/sdk/l10n/json/core.js
@@ -0,0 +1,36 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+ "use strict";
+
+module.metadata = {
+  "stability": "unstable"
+};
+
+var usingJSON = false;
+var hash = {}, bestMatchingLocale = null;
+try {
+  let data = require("@l10n/data");
+  hash = data.hash;
+  bestMatchingLocale = data.bestMatchingLocale;
+  usingJSON = true;
+}
+catch(e) {}
+
+exports.usingJSON = usingJSON;
+
+// Returns the translation for a given key, if available.
+exports.get = function get(k) {
+  return k in hash ? hash[k] : null;
+}
+
+// Returns the full length locale code: ja-JP-mac, en-US or fr
+exports.locale = function locale() {
+  return bestMatchingLocale;
+}
+
+// Returns the short locale code: ja, en, fr
+exports.language = function language() {
+  return bestMatchingLocale ? bestMatchingLocale.split("-")[0].toLowerCase()
+                            : "en";
+}
diff --git a/addon-sdk/source/lib/sdk/l10n/loader.js b/addon-sdk/source/lib/sdk/l10n/loader.js
new file mode 100644
index 000000000..60e219e44
--- /dev/null
+++ b/addon-sdk/source/lib/sdk/l10n/loader.js
@@ -0,0 +1,70 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+"use strict";
+
+module.metadata = {
+  "stability": "unstable"
+};
+
+const { Cc, Ci } = require("chrome");
+const { getPreferedLocales, findClosestLocale } = require("./locale");
+const { readURI } = require("../net/url");
+const { resolve } = require("../core/promise");
+
+function parseJsonURI(uri) {
+  return readURI(uri).
+    then(JSON.parse).
+    then(null, function (error) {
+      throw Error("Failed to parse locale file:\n" + uri + "\n" + error);
+    });
+}
+
+// Returns the array stored in `locales.json` manifest that list available
+// locales files
+function getAvailableLocales(rootURI) {
+  let uri = rootURI + "locales.json";
+  return parseJsonURI(uri).then(function (manifest) {
+    return "locales" in manifest &&
+           Array.isArray(manifest.locales) ?
+           manifest.locales : [];
+  });
+}
+
+// Returns URI of the best locales file to use from the XPI
+function getBestLocale(rootURI) {
+  // Read localization manifest file that contains list of available languages
+  return getAvailableLocales(rootURI).then(function (availableLocales) {
+    // Retrieve list of prefered locales to use
+    let preferedLocales = getPreferedLocales();
+
+    // Compute the most preferable locale to use by using these two lists
+    return findClosestLocale(availableLocales, preferedLocales);
+  });
+}
+
+/**
+ * Read localization files and returns a promise of data to put in `@l10n/data`
+ * pseudo module, in order to allow l10n/json/core to fetch it.
+ */
+exports.load = function load(rootURI) {
+  // First, search for a locale file:
+  return getBestLocale(rootURI).then(function (bestMatchingLocale) {
+    // It may be null if the addon doesn't have any locale file
+    if (!bestMatchingLocale)
+      return resolve(null);
+
+    let localeURI = rootURI + "locale/" + bestMatchingLocale + ".json";
+
+    // Locale files only contains one big JSON object that is used as
+    // an hashtable of: "key to translate" => "translated key"
+    // TODO: We are likely to change this in order to be able to overload
+    //       a specific key translation. For a specific package, module or line?
+    return parseJsonURI(localeURI).then(function (json) {
+      return {
+        hash: json,
+        bestMatchingLocale: bestMatchingLocale
+      };
+    });
+  });
+}
diff --git a/addon-sdk/source/lib/sdk/l10n/locale.js b/addon-sdk/source/lib/sdk/l10n/locale.js
new file mode 100644
index 000000000..950b33b20
--- /dev/null
+++ b/addon-sdk/source/lib/sdk/l10n/locale.js
@@ -0,0 +1,127 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+"use strict";
+
+module.metadata = {
+  "stability": "unstable"
+};
+
+const prefs = require("../preferences/service");
+const { Cu, Cc, Ci } = require("chrome");
+const { Services } = Cu.import("resource://gre/modules/Services.jsm");
+
+/**
+ * Gets the currently selected locale for display.
+ * Gets all usable locale that we can use sorted by priority of relevance
+ * @return  Array of locales, begins with highest priority
+ */
+const PREF_MATCH_OS_LOCALE  = "intl.locale.matchOS";
+const PREF_SELECTED_LOCALE  = "general.useragent.locale";
+const PREF_ACCEPT_LANGUAGES = "intl.accept_languages";
+
+function getPreferedLocales(caseSensitve) {
+  let locales = [];
+  function addLocale(locale) {
+    locale = locale.trim();
+    if (!caseSensitve)
+      locale = locale.toLowerCase();
+    if (locales.indexOf(locale) === -1)
+      locales.push(locale);
+  }
+
+  // Most important locale is OS one. But we use it, only if
+  // "intl.locale.matchOS" pref is set to `true`.
+  // Currently only used for multi-locales mobile builds.
+  // http://mxr.mozilla.org/mozilla-central/source/mobile/android/installer/Makefile.in#46
+  if (prefs.get(PREF_MATCH_OS_LOCALE, false)) {
+    let localeService = Cc["@mozilla.org/intl/nslocaleservice;1"].
+                        getService(Ci.nsILocaleService);
+    let osLocale = localeService.getLocaleComponentForUserAgent();
+    addLocale(osLocale);
+  }
+
+  // In some cases, mainly on Fennec and on Linux version,
+  // `general.useragent.locale` is a special 'localized' value, like:
+  // "chrome://global/locale/intl.properties"
+  let browserUiLocale = prefs.getLocalized(PREF_SELECTED_LOCALE, "") ||
+                        prefs.get(PREF_SELECTED_LOCALE, "");
+  if (browserUiLocale)
+    addLocale(browserUiLocale);
+
+  // Third priority is the list of locales used for web content
+  let contentLocales = prefs.getLocalized(PREF_ACCEPT_LANGUAGES, "") ||
+                       prefs.get(PREF_ACCEPT_LANGUAGES, "");
+  if (contentLocales) {
+    // This list is a string of locales seperated by commas.
+    // There is spaces after commas, so strip each item
+    for (let locale of contentLocales.split(","))
+      addLocale(locale.replace(/(^\s+)|(\s+$)/g, ""));
+  }
+
+  // Finally, we ensure that en-US is the final fallback if it wasn't added
+  addLocale("en-US");
+
+  return locales;
+}
+exports.getPreferedLocales = getPreferedLocales;
+
+/**
+ * Selects the closest matching locale from a list of locales.
+ *
+ * @param  aLocales
+ *         An array of available locales
+ * @param  aMatchLocales
+ *         An array of prefered locales, ordered by priority. Most wanted first.
+ *         Locales have to be in lowercase.
+ *         If null, uses getPreferedLocales() results
+ * @return the best match for the currently selected locale
+ *
+ * Stolen from http://dxr.mozilla.org/mozilla-central/source/toolkit/mozapps/extensions/internal/XPIProvider.jsm
+ */
+exports.findClosestLocale = function findClosestLocale(aLocales, aMatchLocales) {
+  aMatchLocales = aMatchLocales || getPreferedLocales();
+
+  // Holds the best matching localized resource
+  let bestmatch = null;
+  // The number of locale parts it matched with
+  let bestmatchcount = 0;
+  // The number of locale parts in the match
+  let bestpartcount = 0;
+
+  for (let locale of aMatchLocales) {
+    let lparts = locale.split("-");
+    for (let localized of aLocales) {
+      let found = localized.toLowerCase();
+      // Exact match is returned immediately
+      if (locale == found)
+        return localized;
+
+      let fparts = found.split("-");
+      /* If we have found a possible match and this one isn't any longer
+         then we dont need to check further. */
+      if (bestmatch && fparts.length < bestmatchcount)
+        continue;
+
+      // Count the number of parts that match
+      let maxmatchcount = Math.min(fparts.length, lparts.length);
+      let matchcount = 0;
+      while (matchcount < maxmatchcount &&
+             fparts[matchcount] == lparts[matchcount])
+        matchcount++;
+
+      /* If we matched more than the last best match or matched the same and
+         this locale is less specific than the last best match. */
+      if (matchcount > bestmatchcount ||
+         (matchcount == bestmatchcount && fparts.length < bestpartcount)) {
+        bestmatch = localized;
+        bestmatchcount = matchcount;
+        bestpartcount = fparts.length;
+      }
+    }
+    // If we found a valid match for this locale return it
+    if (bestmatch)
+      return bestmatch;
+  }
+  return null;
+}
diff --git a/addon-sdk/source/lib/sdk/l10n/plural-rules.js b/addon-sdk/source/lib/sdk/l10n/plural-rules.js
new file mode 100644
index 000000000..a3ef48a5e
--- /dev/null
+++ b/addon-sdk/source/lib/sdk/l10n/plural-rules.js
@@ -0,0 +1,407 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+// This file is automatically generated with /python-lib/plural-rules-generator.py
+// Fetching data from: http://unicode.org/repos/cldr/trunk/common/supplemental/plurals.xml
+
+// Mapping of short locale name == to == > rule index in following list
+
+module.metadata = {
+  "stability": "unstable"
+};
+
+const LOCALES_TO_RULES = {
+  "af": 3, 
+  "ak": 4, 
+  "am": 4, 
+  "ar": 1, 
+  "asa": 3, 
+  "az": 0, 
+  "be": 11, 
+  "bem": 3, 
+  "bez": 3, 
+  "bg": 3, 
+  "bh": 4, 
+  "bm": 0, 
+  "bn": 3, 
+  "bo": 0, 
+  "br": 20, 
+  "brx": 3, 
+  "bs": 11, 
+  "ca": 3, 
+  "cgg": 3, 
+  "chr": 3, 
+  "cs": 12, 
+  "cy": 17, 
+  "da": 3, 
+  "de": 3, 
+  "dv": 3, 
+  "dz": 0, 
+  "ee": 3, 
+  "el": 3, 
+  "en": 3, 
+  "eo": 3, 
+  "es": 3, 
+  "et": 3, 
+  "eu": 3, 
+  "fa": 0, 
+  "ff": 5, 
+  "fi": 3, 
+  "fil": 4, 
+  "fo": 3, 
+  "fr": 5, 
+  "fur": 3, 
+  "fy": 3, 
+  "ga": 8, 
+  "gd": 24, 
+  "gl": 3, 
+  "gsw": 3, 
+  "gu": 3, 
+  "guw": 4, 
+  "gv": 23, 
+  "ha": 3, 
+  "haw": 3, 
+  "he": 2, 
+  "hi": 4, 
+  "hr": 11, 
+  "hu": 0, 
+  "id": 0, 
+  "ig": 0, 
+  "ii": 0, 
+  "is": 3, 
+  "it": 3, 
+  "iu": 7, 
+  "ja": 0, 
+  "jmc": 3, 
+  "jv": 0, 
+  "ka": 0, 
+  "kab": 5, 
+  "kaj": 3, 
+  "kcg": 3, 
+  "kde": 0, 
+  "kea": 0, 
+  "kk": 3, 
+  "kl": 3, 
+  "km": 0, 
+  "kn": 0, 
+  "ko": 0, 
+  "ksb": 3, 
+  "ksh": 21, 
+  "ku": 3, 
+  "kw": 7, 
+  "lag": 18, 
+  "lb": 3, 
+  "lg": 3, 
+  "ln": 4, 
+  "lo": 0, 
+  "lt": 10, 
+  "lv": 6, 
+  "mas": 3, 
+  "mg": 4, 
+  "mk": 16, 
+  "ml": 3, 
+  "mn": 3, 
+  "mo": 9, 
+  "mr": 3, 
+  "ms": 0, 
+  "mt": 15, 
+  "my": 0, 
+  "nah": 3, 
+  "naq": 7, 
+  "nb": 3, 
+  "nd": 3, 
+  "ne": 3, 
+  "nl": 3, 
+  "nn": 3, 
+  "no": 3, 
+  "nr": 3, 
+  "nso": 4, 
+  "ny": 3, 
+  "nyn": 3, 
+  "om": 3, 
+  "or": 3, 
+  "pa": 3, 
+  "pap": 3, 
+  "pl": 13, 
+  "ps": 3, 
+  "pt": 3, 
+  "rm": 3, 
+  "ro": 9, 
+  "rof": 3, 
+  "ru": 11, 
+  "rwk": 3, 
+  "sah": 0, 
+  "saq": 3, 
+  "se": 7, 
+  "seh": 3, 
+  "ses": 0, 
+  "sg": 0, 
+  "sh": 11, 
+  "shi": 19, 
+  "sk": 12, 
+  "sl": 14, 
+  "sma": 7, 
+  "smi": 7, 
+  "smj": 7, 
+  "smn": 7, 
+  "sms": 7, 
+  "sn": 3, 
+  "so": 3, 
+  "sq": 3, 
+  "sr": 11, 
+  "ss": 3, 
+  "ssy": 3, 
+  "st": 3, 
+  "sv": 3, 
+  "sw": 3, 
+  "syr": 3, 
+  "ta": 3, 
+  "te": 3, 
+  "teo": 3, 
+  "th": 0, 
+  "ti": 4, 
+  "tig": 3, 
+  "tk": 3, 
+  "tl": 4, 
+  "tn": 3, 
+  "to": 0, 
+  "tr": 0, 
+  "ts": 3, 
+  "tzm": 22, 
+  "uk": 11, 
+  "ur": 3, 
+  "ve": 3, 
+  "vi": 0, 
+  "vun": 3, 
+  "wa": 4, 
+  "wae": 3, 
+  "wo": 0, 
+  "xh": 3, 
+  "xog": 3, 
+  "yo": 0, 
+  "zh": 0, 
+  "zu": 3
+};
+
+// Utility functions for plural rules methods
+function isIn(n, list) {
+  return list.indexOf(n) !== -1;
+}
+function isBetween(n, start, end) {
+  return start <= n && n <= end;
+}
+
+// List of all plural rules methods, that maps an integer to the plural form name to use
+const RULES = {
+  "0": function (n) {
+    
+    return "other"
+  },
+  "1": function (n) {
+    if ((isBetween((n % 100), 3, 10)))
+      return "few";
+    if (n == 0)
+      return "zero";
+    if ((isBetween((n % 100), 11, 99)))
+      return "many";
+    if (n == 2)
+      return "two";
+    if (n == 1)
+      return "one";
+    return "other"
+  },
+  "2": function (n) {
+    if (n != 0 && (n % 10) == 0)
+      return "many";
+    if (n == 2)
+      return "two";
+    if (n == 1)
+      return "one";
+    return "other"
+  },
+  "3": function (n) {
+    if (n == 1)
+      return "one";
+    return "other"
+  },
+  "4": function (n) {
+    if ((isBetween(n, 0, 1)))
+      return "one";
+    return "other"
+  },
+  "5": function (n) {
+    if ((isBetween(n, 0, 2)) && n != 2)
+      return "one";
+    return "other"
+  },
+  "6": function (n) {
+    if (n == 0)
+      return "zero";
+    if ((n % 10) == 1 && (n % 100) != 11)
+      return "one";
+    return "other"
+  },
+  "7": function (n) {
+    if (n == 2)
+      return "two";
+    if (n == 1)
+      return "one";
+    return "other"
+  },
+  "8": function (n) {
+    if ((isBetween(n, 3, 6)))
+      return "few";
+    if ((isBetween(n, 7, 10)))
+      return "many";
+    if (n == 2)
+      return "two";
+    if (n == 1)
+      return "one";
+    return "other"
+  },
+  "9": function (n) {
+    if (n == 0 || n != 1 && (isBetween((n % 100), 1, 19)))
+      return "few";
+    if (n == 1)
+      return "one";
+    return "other"
+  },
+  "10": function (n) {
+    if ((isBetween((n % 10), 2, 9)) && !(isBetween((n % 100), 11, 19)))
+      return "few";
+    if ((n % 10) == 1 && !(isBetween((n % 100), 11, 19)))
+      return "one";
+    return "other"
+  },
+  "11": function (n) {
+    if ((isBetween((n % 10), 2, 4)) && !(isBetween((n % 100), 12, 14)))
+      return "few";
+    if ((n % 10) == 0 || (isBetween((n % 10), 5, 9)) || (isBetween((n % 100), 11, 14)))
+      return "many";
+    if ((n % 10) == 1 && (n % 100) != 11)
+      return "one";
+    return "other"
+  },
+  "12": function (n) {
+    if ((isBetween(n, 2, 4)))
+      return "few";
+    if (n == 1)
+      return "one";
+    return "other"
+  },
+  "13": function (n) {
+    if ((isBetween((n % 10), 2, 4)) && !(isBetween((n % 100), 12, 14)))
+      return "few";
+    if (n != 1 && (isBetween((n % 10), 0, 1)) || (isBetween((n % 10), 5, 9)) || (isBetween((n % 100), 12, 14)))
+      return "many";
+    if (n == 1)
+      return "one";
+    return "other"
+  },
+  "14": function (n) {
+    if ((isBetween((n % 100), 3, 4)))
+      return "few";
+    if ((n % 100) == 2)
+      return "two";
+    if ((n % 100) == 1)
+      return "one";
+    return "other"
+  },
+  "15": function (n) {
+    if (n == 0 || (isBetween((n % 100), 2, 10)))
+      return "few";
+    if ((isBetween((n % 100), 11, 19)))
+      return "many";
+    if (n == 1)
+      return "one";
+    return "other"
+  },
+  "16": function (n) {
+    if ((n % 10) == 1 && n != 11)
+      return "one";
+    return "other"
+  },
+  "17": function (n) {
+    if (n == 3)
+      return "few";
+    if (n == 0)
+      return "zero";
+    if (n == 6)
+      return "many";
+    if (n == 2)
+      return "two";
+    if (n == 1)
+      return "one";
+    return "other"
+  },
+  "18": function (n) {
+    if (n == 0)
+      return "zero";
+    if ((isBetween(n, 0, 2)) && n != 0 && n != 2)
+      return "one";
+    return "other"
+  },
+  "19": function (n) {
+    if ((isBetween(n, 2, 10)))
+      return "few";
+    if ((isBetween(n, 0, 1)))
+      return "one";
+    return "other"
+  },
+  "20": function (n) {
+    if ((isBetween((n % 10), 3, 4) || ((n % 10) == 9)) && !(isBetween((n % 100), 10, 19) || isBetween((n % 100), 70, 79) || isBetween((n % 100), 90, 99)))
+      return "few";
+    if ((n % 1000000) == 0 && n != 0)
+      return "many";
+    if ((n % 10) == 2 && !isIn((n % 100), [12, 72, 92]))
+      return "two";
+    if ((n % 10) == 1 && !isIn((n % 100), [11, 71, 91]))
+      return "one";
+    return "other"
+  },
+  "21": function (n) {
+    if (n == 0)
+      return "zero";
+    if (n == 1)
+      return "one";
+    return "other"
+  },
+  "22": function (n) {
+    if ((isBetween(n, 0, 1)) || (isBetween(n, 11, 99)))
+      return "one";
+    return "other"
+  },
+  "23": function (n) {
+    if ((isBetween((n % 10), 1, 2)) || (n % 20) == 0)
+      return "one";
+    return "other"
+  },
+  "24": function (n) {
+    if ((isBetween(n, 3, 10) || isBetween(n, 13, 19)))
+      return "few";
+    if (isIn(n, [2, 12]))
+      return "two";
+    if (isIn(n, [1, 11]))
+      return "one";
+    return "other"
+  },
+};
+
+/**
+  * Return a function that gives the plural form name for a given integer
+  * for the specified `locale`
+  *   let fun = getRulesForLocale('en');
+  *   fun(1)    -> 'one'
+  *   fun(0)    -> 'other'
+  *   fun(1000) -> 'other'
+  */
+exports.getRulesForLocale = function getRulesForLocale(locale) {
+  let index = LOCALES_TO_RULES[locale];
+  if (!(index in RULES)) {
+    console.warn('Plural form unknown for locale "' + locale + '"');
+    return function () { return "other"; };
+  }
+  return RULES[index];
+}
+
diff --git a/addon-sdk/source/lib/sdk/l10n/prefs.js b/addon-sdk/source/lib/sdk/l10n/prefs.js
new file mode 100644
index 000000000..8ee26fc5b
--- /dev/null
+++ b/addon-sdk/source/lib/sdk/l10n/prefs.js
@@ -0,0 +1,51 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+"use strict";
+
+const { on } = require("../system/events");
+const core = require("./core");
+const { id: jetpackId } = require('../self');
+
+const OPTIONS_DISPLAYED = "addon-options-displayed";
+
+function enable() {
+  on(OPTIONS_DISPLAYED, onOptionsDisplayed);  
+}
+exports.enable = enable;
+
+function onOptionsDisplayed({ subject: document, data: addonId }) {
+  if (addonId !== jetpackId)
+    return;
+  localizeInlineOptions(document);
+}
+
+function localizeInlineOptions(document) {
+  let query = 'setting[data-jetpack-id="' + jetpackId + '"][pref-name], ' +
+              'button[data-jetpack-id="' + jetpackId + '"][pref-name]';
+  let nodes = document.querySelectorAll(query);
+  for (let node of nodes) {
+    let name = node.getAttribute("pref-name");
+    if (node.tagName == "setting") {
+      let desc = core.get(name + "_description");
+      if (desc)
+        node.setAttribute("desc", desc);
+      let title = core.get(name + "_title");
+      if (title)
+        node.setAttribute("title", title);
+
+      for (let item of node.querySelectorAll("menuitem, radio")) {
+          let key = name + "_options." + item.getAttribute("label");
+          let label = core.get(key);
+          if (label)
+            item.setAttribute("label", label);
+      }
+    }
+    else if (node.tagName == "button") {
+      let label = core.get(name + "_label");
+      if (label)
+        node.setAttribute("label", label);
+    }
+  }
+}
+exports.localizeInlineOptions = localizeInlineOptions;
diff --git a/addon-sdk/source/lib/sdk/l10n/properties/core.js b/addon-sdk/source/lib/sdk/l10n/properties/core.js
new file mode 100644
index 000000000..7a9081d0b
--- /dev/null
+++ b/addon-sdk/source/lib/sdk/l10n/properties/core.js
@@ -0,0 +1,87 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+"use strict";
+
+const { Cu } = require("chrome");
+const { newURI } = require('../../url/utils')
+const { getRulesForLocale } = require("../plural-rules");
+const { getPreferedLocales } = require('../locale');
+const { rootURI } = require("@loader/options");
+const { Services } = Cu.import("resource://gre/modules/Services.jsm", {});
+
+const baseURI = rootURI + "locale/";
+const preferedLocales = getPreferedLocales(true);
+
+// Make sure we don't get stale data after an update
+// (See Bug 1300735 for rationale).
+Services.strings.flushBundles();
+
+function getLocaleURL(locale) {
+  // if the locale is a valid chrome URI, return it
+  try {
+    let uri = newURI(locale);
+    if (uri.scheme == 'chrome')
+      return uri.spec;
+  }
+  catch(_) {}
+  // otherwise try to construct the url
+  return baseURI + locale + ".properties";
+}
+
+function getKey(locale, key) {
+  let bundle = Services.strings.createBundle(getLocaleURL(locale));
+  try {
+    return bundle.GetStringFromName(key) + "";
+  }
+  catch (_) {}
+  return undefined;
+}
+
+function get(key, n, locales) {
+  // try this locale
+  let locale = locales.shift();
+  let localized;
+
+  if (typeof n == 'number') {
+    if (n == 0) {
+      localized = getKey(locale, key + '[zero]');
+    }
+    else if (n == 1) {
+      localized = getKey(locale, key + '[one]');
+    }
+    else if (n == 2) {
+      localized = getKey(locale, key + '[two]');
+    }
+
+    if (!localized) {
+      // Retrieve the plural mapping function
+      let pluralForm = (getRulesForLocale(locale.split("-")[0].toLowerCase()) ||
+                        getRulesForLocale("en"))(n);
+      localized = getKey(locale, key + '[' + pluralForm + ']');
+    }
+
+    if (!localized) {
+      localized = getKey(locale, key + '[other]');
+    }
+  }
+
+  if (!localized) {
+    localized = getKey(locale, key);
+  }
+
+  if (!localized) {
+    localized = getKey(locale, key + '[other]');
+  }
+
+  if (localized) {
+    return localized;
+  }
+
+  // try next locale
+  if (locales.length)
+    return get(key, n, locales);
+
+  return undefined;
+}
+exports.get = (k, n) => get(k, n, Array.slice(preferedLocales));