1 // Copyright (c) 2010 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 "chrome/browser/resources_util.h" 6 7 #include <utility> 8 9 #include "base/hash_tables.h" 10 #include "base/lazy_instance.h" 11 #include "grit/theme_resources_map.h" 12 13 namespace { 14 15 // A wrapper class that holds a hash_map between resource strings and resource 16 // ids. This is done so we can use base::LazyInstance which takes care of 17 // thread safety in initializing the hash_map for us. 18 class ThemeMap { 19 public: 20 typedef base::hash_map<std::string, int> StringIntMap; 21 22 ThemeMap() { 23 for (size_t i = 0; i < kThemeResourcesSize; ++i) { 24 id_map_[kThemeResources[i].name] = kThemeResources[i].value; 25 } 26 } 27 28 int GetId(const std::string& resource_name) { 29 StringIntMap::const_iterator it = id_map_.find(resource_name); 30 if (it == id_map_.end()) 31 return -1; 32 return it->second; 33 } 34 35 private: 36 StringIntMap id_map_; 37 }; 38 39 static base::LazyInstance<ThemeMap> g_theme_ids(base::LINKER_INITIALIZED); 40 41 } // namespace 42 43 int ResourcesUtil::GetThemeResourceId(const std::string& resource_name) { 44 return g_theme_ids.Get().GetId(resource_name); 45 } 46
