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_frame.h"
   9 #include "content/public/renderer/render_thread.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]);
  38     if (extension_id.empty())
  39       return;
  40   }
  41
  42   L10nMessagesMap* l10n_messages = GetL10nMessagesMap(extension_id);
  43   if (!l10n_messages) {
  44     content::RenderFrame* render_frame = context()->GetRenderFrame();
  45     if (!render_frame)
  46       return;
  47
  48     L10nMessagesMap messages;
  49     // A sync call to load message catalogs for current extension.
  50     render_frame->Send(
  51         new ExtensionHostMsg_GetMessageBundle(extension_id, &messages));
  52
  53     // Save messages we got.
  54     ExtensionToL10nMessagesMap& l10n_messages_map =
  55         *GetExtensionToL10nMessagesMap();
  56     l10n_messages_map[extension_id] = messages;
  57
  58     l10n_messages = GetL10nMessagesMap(extension_id);
  59   }
  60
  61   std::string message_name = *v8::String::Utf8Value(args[0]);
  62   std::string message =
  63       MessageBundle::GetL10nMessage(message_name, *l10n_messages);
  64
  65   v8::Isolate* isolate = args.GetIsolate();
  66   std::vector<std::string> substitutions;
  67   if (args[1]->IsArray()) {
  68     // chrome.i18n.getMessage("message_name", ["more", "params"]);
  69     v8::Local<v8::Array> placeholders = v8::Local<v8::Array>::Cast(args[1]);
  70     uint32_t count = placeholders->Length();
  71     if (count > 9)
  72       return;
  73     for (uint32_t i = 0; i < count; ++i) {
  74       substitutions.push_back(*v8::String::Utf8Value(placeholders->Get(
  75           v8::Integer::New(isolate, i))));
  76     }
  77   } else if (args[1]->IsString()) {
  78     // chrome.i18n.getMessage("message_name", "one param");
  79     substitutions.push_back(*v8::String::Utf8Value(args[1]));
  80   }
  81
  82   args.GetReturnValue().Set(v8::String::NewFromUtf8(
  83       isolate,
  84       ReplaceStringPlaceholders(message, substitutions, NULL).c_str()));
  85 }
  86
  87 void I18NCustomBindings::GetL10nUILanguage(
  88     const v8::FunctionCallbackInfo<v8::Value>& args) {
  89   args.GetReturnValue().Set(v8::String::NewFromUtf8(
  90       args.GetIsolate(), content::RenderThread::Get()->GetLocale().c_str()));
  91 }
  92
  93 }  // namespace extensions