- add sources.
[platform/framework/web/crosswalk.git] / src / chrome / browser / resources_util.cc
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 #include "chrome/browser/resources_util.h"
6
7 #include <utility>
8
9 #include "base/containers/hash_tables.h"
10 #include "base/lazy_instance.h"
11 #include "grit/theme_resources_map.h"
12 #include "grit/ui_resources_map.h"
13
14 namespace {
15
16 // A wrapper class that holds a hash_map between resource strings and resource
17 // ids.  This is done so we can use base::LazyInstance which takes care of
18 // thread safety in initializing the hash_map for us.
19 class ThemeMap {
20  public:
21   typedef base::hash_map<std::string, int> StringIntMap;
22
23   ThemeMap() {
24     for (size_t i = 0; i < kThemeResourcesSize; ++i)
25       id_map_[kThemeResources[i].name] = kThemeResources[i].value;
26     for (size_t i = 0; i < kUiResourcesSize; ++i)
27       id_map_[kUiResources[i].name] = kUiResources[i].value;
28   }
29
30   int GetId(const std::string& resource_name) {
31     StringIntMap::const_iterator it = id_map_.find(resource_name);
32     if (it == id_map_.end())
33       return -1;
34     return it->second;
35   }
36
37  private:
38   StringIntMap id_map_;
39 };
40
41 static base::LazyInstance<ThemeMap> g_theme_ids = LAZY_INSTANCE_INITIALIZER;
42
43 }  // namespace
44
45 int ResourcesUtil::GetThemeResourceId(const std::string& resource_name) {
46   return g_theme_ids.Get().GetId(resource_name);
47 }