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      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 // This file defines utility functions for fetching localized resources.
      6 
      7 #include "chrome/installer/util/l10n_string_util.h"
      8 
      9 #include <atlbase.h>
     10 
     11 #include <algorithm>
     12 
     13 #include "base/logging.h"
     14 #include "base/memory/scoped_ptr.h"
     15 #include "base/strings/string_util.h"
     16 #include "base/strings/stringprintf.h"
     17 #include "chrome/installer/util/language_selector.h"
     18 
     19 namespace {
     20 
     21 const installer::LanguageSelector& GetLanguageSelector() {
     22   static const installer::LanguageSelector instance;
     23 
     24   return instance;
     25 }
     26 
     27 installer::TranslationDelegate* g_translation_delegate = NULL;
     28 
     29 }  // namespace
     30 
     31 namespace installer {
     32 
     33 TranslationDelegate::~TranslationDelegate() {
     34 }
     35 
     36 void SetTranslationDelegate(TranslationDelegate* delegate) {
     37   g_translation_delegate = delegate;
     38 }
     39 
     40 std::wstring GetLocalizedString(int base_message_id) {
     41   if (g_translation_delegate)
     42     return g_translation_delegate->GetLocalizedString(base_message_id);
     43 
     44   std::wstring localized_string;
     45 
     46   int message_id = base_message_id + GetLanguageSelector().offset();
     47   const ATLSTRINGRESOURCEIMAGE* image = AtlGetStringResourceImage(
     48       _AtlBaseModule.GetModuleInstance(), message_id);
     49   if (image) {
     50     localized_string = std::wstring(image->achString, image->nLength);
     51   } else {
     52     NOTREACHED() << "Unable to find resource id " << message_id;
     53   }
     54 
     55   return localized_string;
     56 }
     57 
     58 // Here we generate the url spec with the Microsoft res:// scheme which is
     59 // explained here : http://support.microsoft.com/kb/220830
     60 std::wstring GetLocalizedEulaResource() {
     61   wchar_t full_exe_path[MAX_PATH];
     62   int len = ::GetModuleFileName(NULL, full_exe_path, MAX_PATH);
     63   if (len == 0 || len == MAX_PATH)
     64     return L"";
     65 
     66   // The resource names are more or less the upcased language names.
     67   std::wstring language(GetLanguageSelector().selected_translation());
     68   std::replace(language.begin(), language.end(), L'-', L'_');
     69   StringToUpperASCII(&language);
     70 
     71   std::wstring resource(L"IDR_OEMPG_");
     72   resource.append(language).append(L".HTML");
     73 
     74   // Fall back on "en" if we don't have a resource for this language.
     75   if (NULL == FindResource(NULL, resource.c_str(), RT_HTML))
     76     resource = L"IDR_OEMPG_EN.HTML";
     77 
     78   // Spaces and DOS paths must be url encoded.
     79   std::wstring url_path =
     80       base::StringPrintf(L"res://%ls/#23/%ls", full_exe_path, resource.c_str());
     81 
     82   // The cast is safe because url_path has limited length
     83   // (see the definition of full_exe_path and resource).
     84   DCHECK(kuint32max > (url_path.size() * 3));
     85   DWORD count = static_cast<DWORD>(url_path.size() * 3);
     86   scoped_ptr<wchar_t[]> url_canon(new wchar_t[count]);
     87   HRESULT hr = ::UrlCanonicalizeW(url_path.c_str(), url_canon.get(),
     88                                   &count, URL_ESCAPE_UNSAFE);
     89   if (SUCCEEDED(hr))
     90     return std::wstring(url_canon.get());
     91   return url_path;
     92 }
     93 
     94 std::wstring GetCurrentTranslation() {
     95   return GetLanguageSelector().selected_translation();
     96 }
     97 
     98 }  // namespace installer
     99