chrome/browser/android/resource_mapper.cc

   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 #include "chrome/browser/android/resource_mapper.h"
   6
   7 #include <map>
   8
   9 #include "base/lazy_instance.h"
  10 #include "base/logging.h"
  11 #include "grit/theme_resources.h"
  12
  13 namespace {
  14
  15 typedef std::map<int, int> ResourceMap;
  16 base::LazyInstance<ResourceMap>::Leaky g_id_map = LAZY_INSTANCE_INITIALIZER;
  17
  18 } // namespace
  19
  20 const int ResourceMapper::kMissingId = -1;
  21
  22 int ResourceMapper::MapFromChromiumId(int resource_id) {
  23   if (g_id_map.Get().empty()) {
  24     ConstructMap();
  25   }
  26
  27   ResourceMap::iterator iterator = g_id_map.Get().find(resource_id);
  28   if (iterator != g_id_map.Get().end()) {
  29     return iterator->second;
  30   }
  31
  32   // The resource couldn't be found.
  33   NOTREACHED();
  34   return kMissingId;
  35 }
  36
  37 void ResourceMapper::ConstructMap() {
  38   DCHECK(g_id_map.Get().empty());
  39   int next_id = 0;
  40
  41 #define DEFINE_RESOURCE_ID(c_id,java_id) g_id_map.Get()[c_id] = next_id++;
  42 #include "chrome/browser/android/resource_id.h"
  43 #undef DEFINE_RESOURCE_ID
  44 }