Share code between Mac and Linux in ResourceBundle.

app/resource_bundle_posix.cc

+// Copyright (c) 2009 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "app/resource_bundle.h"
+
+#include "app/gfx/font.h"
+#include "base/data_pack.h"
+#include "base/logging.h"
+#include "base/string16.h"
+#include "base/string_piece.h"
+
+namespace {
+
+base::DataPack* LoadResourcesDataPak(FilePath resources_pak_path) {
+  base::DataPack* resources_pak = new base::DataPack;
+  bool success = resources_pak->Load(resources_pak_path);
+  if (!success) {
+    delete resources_pak;
+    resources_pak = NULL;
+  }
+  return resources_pak;
+}
+
+}  // namespace
+
+ResourceBundle::~ResourceBundle() {
+  FreeImages();
+#if defined(OS_LINUX)
+  FreeGdkPixBufs();
+#endif
+  delete locale_resources_data_;
+  locale_resources_data_ = NULL;
+  delete resources_data_;
+  resources_data_ = NULL;
+}
+
+// static
+RefCountedStaticMemory* ResourceBundle::LoadResourceBytes(
+    DataHandle module, int resource_id) {
+  DCHECK(module);
+  return module->GetStaticMemory(resource_id);
+}
+
+base::StringPiece ResourceBundle::GetRawDataResource(int resource_id) {
+  DCHECK(resources_data_);
+  base::StringPiece data;
+  if (!resources_data_->GetStringPiece(resource_id, &data)) {
+    if (!locale_resources_data_->GetStringPiece(resource_id, &data)) {
+      return base::StringPiece();
+    }
+  }
+  return data;
+}
+
+string16 ResourceBundle::GetLocalizedString(int message_id) {
+  // If for some reason we were unable to load a resource pak, return an empty
+  // string (better than crashing).
+  if (!locale_resources_data_) {
+    LOG(WARNING) << "locale resources are not loaded";
+    return string16();
+  }
+
+  base::StringPiece data;
+  if (!locale_resources_data_->GetStringPiece(message_id, &data)) {
+    // Fall back on the main data pack (shouldn't be any strings here except in
+    // unittests).
+    data = GetRawDataResource(message_id);
+    if (data.empty()) {
+      NOTREACHED() << "unable to find resource: " << message_id;
+      return string16();
+    }
+  }
+
+  // Data pack encodes strings as UTF16.
+  DCHECK_EQ(data.length() % 2, 0U);
+  string16 msg(reinterpret_cast<const char16*>(data.data()),
+               data.length() / 2);
+  return msg;
+}
+
+void ResourceBundle::LoadResources(const std::wstring& pref_locale) {
+  DCHECK(!resources_data_) << "chrome.pak already loaded";
+  FilePath resources_file_path = GetResourcesFilePath();
+  DCHECK(!resources_file_path.empty()) << "chrome.pak not found";
+  resources_data_ = LoadResourcesDataPak(resources_file_path);
+  DCHECK(resources_data_) << "failed to load chrome.pak";
+
+  DCHECK(!locale_resources_data_) << "locale.pak already loaded";
+  FilePath locale_file_path = GetLocaleFilePath(pref_locale);
+  if (locale_file_path.empty()) {
+    // It's possible that there is no locale.pak.
+    NOTREACHED();
+    return;
+  }
+  locale_resources_data_ = LoadResourcesDataPak(locale_file_path);
+  DCHECK(locale_resources_data_) << "failed to load locale.pak";
+}