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