extensions/renderer/resources/i18n_custom_bindings.js

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 // Custom binding for the i18n API.
   6
   7 var binding = require('binding').Binding.create('i18n');
   8
   9 var i18nNatives = requireNative('i18n');
  10 var GetL10nMessage = i18nNatives.GetL10nMessage;
  11 var GetL10nUILanguage = i18nNatives.GetL10nUILanguage;
  12 var DetectTextLanguage = i18nNatives.DetectTextLanguage;
  13
  14 binding.registerCustomHook(function(bindingsAPI, extensionId) {
  15   var apiFunctions = bindingsAPI.apiFunctions;
  16
  17   apiFunctions.setUpdateArgumentsPreValidate('getMessage', function() {
  18     var args = $Array.slice(arguments);
  19
  20     // The first argument is the message, and should be a string.
  21     var message = args[0];
  22     if (typeof(message) !== 'string') {
  23       console.warn(extensionId + ': the first argument to getMessage should ' +
  24                    'be type "string", was ' + message +
  25                    ' (type "' + typeof(message) + '")');
  26       args[0] = String(message);
  27     }
  28
  29     return args;
  30   });
  31
  32   apiFunctions.setHandleRequest('getMessage',
  33                                 function(messageName, substitutions) {
  34     return GetL10nMessage(messageName, substitutions, extensionId);
  35   });
  36
  37   apiFunctions.setHandleRequest('getUILanguage', function() {
  38     return GetL10nUILanguage();
  39   });
  40
  41   apiFunctions.setHandleRequest('detectLanguage', function(text, callback) {
  42     window.setTimeout(function() {
  43       var response = DetectTextLanguage(text);
  44       callback(response);
  45     }, 0);
  46   });
  47 });
  48
  49 exports.binding = binding.generate();