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| 1 // Copyright (c) 2011 The Native Client 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 #ifndef CALLBACK_H_ | |
| 6 #define CALLBACK_H_ | |
| 7 | |
| 8 #include <map> | |
| 9 #include <string> | |
| 10 #include <vector> | |
| 11 #include "ppapi/cpp/var.h" | |
| 12 | |
| 13 namespace scripting { | |
| 14 | |
| 15 class ScriptingBridge; | |
| 16 | |
| 17 // Templates used to support method call-backs when a method or property is | |
| 18 // accessed from the browser code. | |
| 19 | |
| 20 // Class suite used to publish a method name to Javascript. Typical use is | |
| 21 // like this: | |
| 22 // photo::MethodCallback<Calculator>* calculate_callback_; | |
| 23 // calculate_callback_ = | |
| 24 // new scripting::MethodCallback<Calculator>(this, | |
| 25 // &Calculator::Calculate); | |
| 26 // bridge->AddMethodNamed("calculate", calculate_callback_); | |
| 27 // ... | |
| 28 // delete calculate_callback_; | |
| 29 // | |
| 30 // The caller must delete the callback. | |
| 31 | |
| 32 // Methods get parameters as a dictionary that maps parameter names to values. | |
| 33 typedef std::map<std::string, std::string> MethodParameter; | |
| 34 | |
| 35 // Pure virtual class used in STL containers. | |
| 36 class MethodCallbackExecutor { | |
| 37 public: | |
| 38 virtual ~MethodCallbackExecutor() {} | |
| 39 virtual void Execute( | |
| 40 const ScriptingBridge& bridge, | |
| 41 const MethodParameter& parameters) = 0; | |
| 42 }; | |
| 43 | |
| 44 template <class T> | |
| 45 class MethodCallback : public MethodCallbackExecutor { | |
| 46 public: | |
| 47 typedef void (T::*Method)( | |
| 48 const ScriptingBridge& bridge, | |
| 49 const MethodParameter& parameters); | |
| 50 | |
| 51 MethodCallback(T* instance, Method method) | |
| 52 : instance_(instance), method_(method) {} | |
| 53 virtual ~MethodCallback() {} | |
| 54 virtual void Execute( | |
| 55 const ScriptingBridge& bridge, | |
| 56 const MethodParameter& parameters) { | |
| 57 // Use "this->" to force C++ to look inside our templatized base class; see | |
| 58 // Effective C++, 3rd Ed, item 43, p210 for details. | |
| 59 ((this->instance_)->*(this->method_))(bridge, parameters); | |
| 60 } | |
| 61 | |
| 62 private: | |
| 63 T* instance_; | |
| 64 Method method_; | |
| 65 }; | |
| 66 | |
| 67 template <class T> | |
| 68 class ConstMethodCallback : public MethodCallbackExecutor { | |
| 69 public: | |
| 70 typedef void (T::*ConstMethod)( | |
| 71 const ScriptingBridge& bridge, | |
| 72 const MethodParameter& parameters) const; | |
| 73 | |
| 74 ConstMethodCallback(const T* instance, ConstMethod method) | |
| 75 : instance_(instance), const_method_(method) {} | |
| 76 virtual ~ConstMethodCallback() {} | |
| 77 virtual void Execute( | |
| 78 const ScriptingBridge& bridge, | |
| 79 const MethodParameter& parameters) { | |
| 80 // Use "this->" to force C++ to look inside our templatized base class; see | |
| 81 // Effective C++, 3rd Ed, item 43, p210 for details. | |
| 82 ((this->instance_)->*(this->const_method_))(bridge, parameters); | |
| 83 } | |
| 84 | |
| 85 private: | |
| 86 const T* instance_; | |
| 87 ConstMethod const_method_; | |
| 88 }; | |
| 89 | |
| 90 } // namespace scripting | |
| 91 | |
| 92 #endif // CALLBACK_H_ | |
| 93 | |
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Chromium Code Reviews
Issue 10928195:
First round of dead file removal (Closed)
Base URL: https://github.com/samclegg/nativeclient-sdk.git@master