chrome/renderer/extensions/i18n_custom_bindings.cc

   1 // Copyright (c) 2012 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 #include "chrome/renderer/extensions/i18n_custom_bindings.h"
   6
   7 #include "base/bind.h"
   8 #include "chrome/common/extensions/message_bundle.h"
   9 #include "content/public/renderer/render_thread.h"
  10 #include "content/public/renderer/render_view.h"
  11 #include "extensions/common/extension_messages.h"
  12 #include "grit/renderer_resources.h"
  13 #include "v8/include/v8.h"
  14
  15 namespace extensions {
  16
  17 I18NCustomBindings::I18NCustomBindings(Dispatcher* dispatcher,
  18                                        ChromeV8Context* context)
  19     : ChromeV8Extension(dispatcher, context) {
  20   RouteFunction("GetL10nMessage",
  21       base::Bind(&I18NCustomBindings::GetL10nMessage, base::Unretained(this)));
  22   RouteFunction("GetL10nUILanguage",
  23                 base::Bind(&I18NCustomBindings::GetL10nUILanguage,
  24                            base::Unretained(this)));
  25 }
  26
  27 void I18NCustomBindings::GetL10nMessage(
  28     const v8::FunctionCallbackInfo<v8::Value>& args) {
  29   if (args.Length() != 3 || !args[0]->IsString()) {
  30     NOTREACHED() << "Bad arguments";
  31     return;
  32   }
  33
  34   std::string extension_id;
  35   if (args[2]->IsNull() || !args[2]->IsString()) {
  36     return;
  37   } else {
  38     extension_id = *v8::String::Utf8Value(args[2]->ToString());
  39     if (extension_id.empty())
  40       return;
  41   }
  42
  43   L10nMessagesMap* l10n_messages = GetL10nMessagesMap(extension_id);
  44   if (!l10n_messages) {
  45     // Get the current RenderView so that we can send a routed IPC message
  46     // from the correct source.
  47     content::RenderView* renderview = GetRenderView();
  48     if (!renderview)
  49       return;
  50
  51     L10nMessagesMap messages;
  52     // A sync call to load message catalogs for current extension.
  53     renderview->Send(new ExtensionHostMsg_GetMessageBundle(
  54         extension_id, &messages));
  55
  56     // Save messages we got.
  57     ExtensionToL10nMessagesMap& l10n_messages_map =
  58         *GetExtensionToL10nMessagesMap();
  59     l10n_messages_map[extension_id] = messages;
  60
  61     l10n_messages = GetL10nMessagesMap(extension_id);
  62   }
  63
  64   std::string message_name = *v8::String::Utf8Value(args[0]);
  65   std::string message =
  66       MessageBundle::GetL10nMessage(message_name, *l10n_messages);
  67
  68   v8::Isolate* isolate = args.GetIsolate();
  69   std::vector<std::string> substitutions;
  70   if (args[1]->IsArray()) {
  71     // chrome.i18n.getMessage("message_name", ["more", "params"]);
  72     v8::Local<v8::Array> placeholders = v8::Local<v8::Array>::Cast(args[1]);
  73     uint32_t count = placeholders->Length();
  74     if (count > 9)
  75       return;
  76     for (uint32_t i = 0; i < count; ++i) {
  77       substitutions.push_back(
  78           *v8::String::Utf8Value(
  79               placeholders->Get(v8::Integer::New(isolate, i))->ToString()));
  80     }
  81   } else if (args[1]->IsString()) {
  82     // chrome.i18n.getMessage("message_name", "one param");
  83     substitutions.push_back(*v8::String::Utf8Value(args[1]->ToString()));
  84   }
  85
  86   args.GetReturnValue().Set(
  87       v8::String::NewFromUtf8(isolate, ReplaceStringPlaceholders(
  88         message, substitutions, NULL).c_str()));
  89 }
  90
  91 void I18NCustomBindings::GetL10nUILanguage(
  92     const v8::FunctionCallbackInfo<v8::Value>& args) {
  93   args.GetReturnValue().Set(v8::String::NewFromUtf8(
  94       args.GetIsolate(), content::RenderThread::Get()->GetLocale().c_str()));
  95 }
  96
  97 }  // namespace extensions