ash/display/display_pref_util.h

   1 // Copyright (c) 2013 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 #ifndef ASH_DISPLAY_DISPLAY_PREF_UTIL_H
   6 #define ASH_DISPLAY_DISPLAY_PREF_UTIL_H
   7
   8 #include <map>
   9 #include <string>
  10
  11 #include "base/strings/string_piece.h"
  12
  13 namespace ash {
  14
  15 // Utility templates to create enum to string map and
  16 // a function to find an enum value from a string.
  17 template<typename T>
  18 std::map<T, std::string>* CreateToStringMap(T k1, const std::string& v1,
  19                                             T k2, const std::string& v2,
  20                                             T k3, const std::string& v3,
  21                                             T k4, const std::string& v4) {
  22   std::map<T, std::string>* map = new std::map<T, std::string>();
  23   (*map)[k1] = v1;
  24   (*map)[k2] = v2;
  25   (*map)[k3] = v3;
  26   (*map)[k4] = v4;
  27   return map;
  28 }
  29
  30 template<typename T>
  31 std::map<T, std::string>* CreateToStringMap(T k1, const std::string& v1,
  32                                             T k2, const std::string& v2,
  33                                             T k3, const std::string& v3) {
  34   std::map<T, std::string>* map = new std::map<T, std::string>();
  35   (*map)[k1] = v1;
  36   (*map)[k2] = v2;
  37   (*map)[k3] = v3;
  38   return map;
  39 }
  40
  41 template<typename T>
  42 bool ReverseFind(const std::map<T, std::string>* map,
  43                  const base::StringPiece& value,
  44                  T* key) {
  45   typename std::map<T, std::string>::const_iterator iter = map->begin();
  46   for (;
  47        iter != map->end();
  48        ++iter) {
  49     if (iter->second == value) {
  50       *key = iter->first;
  51       return true;
  52     }
  53   }
  54   return false;
  55 }
  56
  57 }  // namespace ash
  58
  59 #endif  // ASH_DISPLAY_DISPLAY_PREF_UTIL_H