src/extensions/renderer/i18n_custom_bindings.cc

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