1a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)// Copyright 2014 The Chromium Authors. All rights reserved. 25821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Use of this source code is governed by a BSD-style license that can be 35821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// found in the LICENSE file. 45821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 5a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)#ifndef EXTENSIONS_BROWSER_EXTENSION_FUNCTION_REGISTRY_H_ 6a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)#define EXTENSIONS_BROWSER_EXTENSION_FUNCTION_REGISTRY_H_ 75821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 85821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <map> 95821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <string> 105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <vector> 115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 12a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)#include "extensions/browser/extension_function_histogram_value.h" 132a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)class ExtensionFunction; 155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// A factory function for creating new ExtensionFunction instances. 175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)typedef ExtensionFunction* (*ExtensionFunctionFactory)(); 185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Template for defining ExtensionFunctionFactory. 20a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)template <class T> 215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)ExtensionFunction* NewExtensionFunction() { 225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return new T(); 235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Contains a list of all known extension functions and allows clients to 265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// create instances of them. 275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)class ExtensionFunctionRegistry { 285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) public: 295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) static ExtensionFunctionRegistry* GetInstance(); 305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) explicit ExtensionFunctionRegistry(); 315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) virtual ~ExtensionFunctionRegistry(); 325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Adds all function names to 'names'. 345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) void GetAllNames(std::vector<std::string>* names); 355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Allows overriding of specific functions (e.g. for testing). Functions 375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // must be previously registered. Returns true if successful. 385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bool OverrideFunction(const std::string& name, 395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ExtensionFunctionFactory factory); 405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Factory method for the ExtensionFunction registered as 'name'. 425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ExtensionFunction* NewFunction(const std::string& name); 435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 44a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) template <class T> 455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) void RegisterFunction() { 462a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) ExtensionFunctionFactory factory = &NewExtensionFunction<T>; 472a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) factories_[T::function_name()] = 482a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) FactoryEntry(factory, T::histogram_value()); 495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 512a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) struct FactoryEntry { 522a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) public: 532a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) explicit FactoryEntry(); 54a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) explicit FactoryEntry( 55a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) ExtensionFunctionFactory factory, 56a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) extensions::functions::HistogramValue histogram_value); 572a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 582a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) ExtensionFunctionFactory factory_; 592a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) extensions::functions::HistogramValue histogram_value_; 602a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) }; 612a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 622a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) typedef std::map<std::string, FactoryEntry> FactoryMap; 635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) FactoryMap factories_; 645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)}; 655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 66a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)#endif // EXTENSIONS_BROWSER_EXTENSION_FUNCTION_REGISTRY_H_ 67