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      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
     97