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/components_scaled_resources.h"
  12 #include "grit/theme_resources.h"
  13
  14 namespace {
  15
  16 typedef std::map<int, int> ResourceMap;
  17 base::LazyInstance<ResourceMap>::Leaky g_id_map = LAZY_INSTANCE_INITIALIZER;
  18
  19 } // namespace
  20
  21 const int ResourceMapper::kMissingId = -1;
  22
  23 int ResourceMapper::MapFromChromiumId(int resource_id) {
  24   if (g_id_map.Get().empty()) {
  25     ConstructMap();
  26   }
  27
  28   ResourceMap::iterator iterator = g_id_map.Get().find(resource_id);
  29   if (iterator != g_id_map.Get().end()) {
  30     return iterator->second;
  31   }
  32
  33   // The resource couldn't be found.
  34   NOTREACHED();
  35   return kMissingId;
  36 }
  37
  38 void ResourceMapper::ConstructMap() {
  39   DCHECK(g_id_map.Get().empty());
  40   int next_id = 0;
  41
  42 #define DEFINE_RESOURCE_ID(c_id,java_id) g_id_map.Get()[c_id] = next_id++;
  43 #include "chrome/browser/android/resource_id.h"
  44 #undef DEFINE_RESOURCE_ID
  45 }