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// 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_
#pragma once
#include <map>
#include <string>
#include <vector>
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() {
factories_[T::function_name()] = &NewExtensionFunction<T>;
}
private:
typedef std::map<std::string, ExtensionFunctionFactory> FactoryMap;
FactoryMap factories_;
};
#endif // CHROME_BROWSER_EXTENSIONS_EXTENSION_FUNCTION_REGISTRY_H_
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