extensions/browser/extension_function_registry.cc

   1 // Copyright 2014 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 "extensions/browser/extension_function_registry.h"
   6
   7 #include "base/memory/singleton.h"
   8 #include "extensions/browser/extension_function.h"
   9 #include "extensions/browser/extensions_browser_client.h"
  10
  11 // static
  12 ExtensionFunctionRegistry* ExtensionFunctionRegistry::GetInstance() {
  13   return base::Singleton<ExtensionFunctionRegistry>::get();
  14 }
  15
  16 ExtensionFunctionRegistry::ExtensionFunctionRegistry() {
  17   extensions::ExtensionsBrowserClient* client =
  18       extensions::ExtensionsBrowserClient::Get();
  19   if (client) {
  20     client->RegisterExtensionFunctions(this);
  21   }
  22 }
  23
  24 ExtensionFunctionRegistry::~ExtensionFunctionRegistry() {}
  25
  26 bool ExtensionFunctionRegistry::OverrideFunction(
  27     const std::string& name,
  28     ExtensionFunctionFactory factory) {
  29   FactoryMap::iterator iter = factories_.find(name);
  30   if (iter == factories_.end()) {
  31     return false;
  32   } else {
  33     iter->second.factory_ = factory;
  34     return true;
  35   }
  36 }
  37
  38 ExtensionFunction* ExtensionFunctionRegistry::NewFunction(
  39     const std::string& name) {
  40   FactoryMap::iterator iter = factories_.find(name);
  41   if (iter == factories_.end()) {
  42     return NULL;
  43   }
  44   ExtensionFunction* function = iter->second.factory_();
  45   function->set_name(iter->second.function_name_);
  46   function->set_histogram_value(iter->second.histogram_value_);
  47   return function;
  48 }
  49
  50 ExtensionFunctionRegistry::FactoryEntry::FactoryEntry()
  51     : factory_(0),
  52       function_name_(nullptr),
  53       histogram_value_(extensions::functions::UNKNOWN) {
  54 }
  55
  56 ExtensionFunctionRegistry::FactoryEntry::FactoryEntry(
  57     ExtensionFunctionFactory factory,
  58     const char* function_name,
  59     extensions::functions::HistogramValue histogram_value)
  60     : factory_(factory),
  61       function_name_(function_name),
  62       histogram_value_(histogram_value) {
  63 }