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#if defined(OS_CHROMEOS)
15#include "grit/ui_chromeos_resources_map.h"
16#endif
17
18namespace {
19
20// A wrapper class that holds a hash_map between resource strings and resource
21// ids.  This is done so we can use base::LazyInstance which takes care of
22// thread safety in initializing the hash_map for us.
23class ThemeMap {
24 public:
25  typedef base::hash_map<std::string, int> StringIntMap;
26
27  ThemeMap() {
28    for (size_t i = 0; i < kThemeResourcesSize; ++i)
29      id_map_[kThemeResources[i].name] = kThemeResources[i].value;
30    for (size_t i = 0; i < kUiResourcesSize; ++i)
31      id_map_[kUiResources[i].name] = kUiResources[i].value;
32#if defined(OS_CHROMEOS)
33    for (size_t i = 0; i < kUiChromeosResourcesSize; ++i)
34      id_map_[kUiChromeosResources[i].name] = kUiChromeosResources[i].value;
35#endif
36  }
37
38  int GetId(const std::string& resource_name) {
39    StringIntMap::const_iterator it = id_map_.find(resource_name);
40    if (it == id_map_.end())
41      return -1;
42    return it->second;
43  }
44
45 private:
46  StringIntMap id_map_;
47};
48
49static base::LazyInstance<ThemeMap> g_theme_ids = LAZY_INSTANCE_INITIALIZER;
50
51}  // namespace
52
53int ResourcesUtil::GetThemeResourceId(const std::string& resource_name) {
54  return g_theme_ids.Get().GetId(resource_name);
55}
56