| // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef CHROME_BROWSER_EXTENSIONS_EXTENSION_FUNCTION_REGISTRY_H_ |
| #define CHROME_BROWSER_EXTENSIONS_EXTENSION_FUNCTION_REGISTRY_H_ |
| |
| #include <map> |
| #include <string> |
| #include <vector> |
| |
| #include "chrome/browser/extensions/extension_function_histogram_value.h" |
| |
| class ExtensionFunction; |
| |
| // A factory function for creating new ExtensionFunction instances. |
| typedef ExtensionFunction* (*ExtensionFunctionFactory)(); |
| |
| // Template for defining ExtensionFunctionFactory. |
| template<class T> |
| ExtensionFunction* NewExtensionFunction() { |
| return new T(); |
| } |
| |
| // Contains a list of all known extension functions and allows clients to |
| // create instances of them. |
| class ExtensionFunctionRegistry { |
| public: |
| static ExtensionFunctionRegistry* GetInstance(); |
| explicit ExtensionFunctionRegistry(); |
| virtual ~ExtensionFunctionRegistry(); |
| |
| // Resets all functions to their default values. |
| void ResetFunctions(); |
| |
| // Adds all function names to 'names'. |
| void GetAllNames(std::vector<std::string>* names); |
| |
| // Allows overriding of specific functions (e.g. for testing). Functions |
| // must be previously registered. Returns true if successful. |
| bool OverrideFunction(const std::string& name, |
| ExtensionFunctionFactory factory); |
| |
| // Factory method for the ExtensionFunction registered as 'name'. |
| ExtensionFunction* NewFunction(const std::string& name); |
| |
| template<class T> |
| void RegisterFunction() { |
| ExtensionFunctionFactory factory = &NewExtensionFunction<T>; |
| factories_[T::function_name()] = |
| FactoryEntry(factory, T::histogram_value()); |
| } |
| |
| struct FactoryEntry { |
| public: |
| explicit FactoryEntry(); |
| explicit FactoryEntry(ExtensionFunctionFactory factory, |
| extensions::functions::HistogramValue histogram_value); |
| |
| ExtensionFunctionFactory factory_; |
| extensions::functions::HistogramValue histogram_value_; |
| }; |
| |
| typedef std::map<std::string, FactoryEntry> FactoryMap; |
| FactoryMap factories_; |
| }; |
| |
| #endif // CHROME_BROWSER_EXTENSIONS_EXTENSION_FUNCTION_REGISTRY_H_ |