1 // Copyright (c) 2011 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 <algorithm> 6 7 #include "ppapi/cpp/instance.h" 8 #include "ppapi/cpp/module.h" 9 #include "ppapi/cpp/var.h" 10 11 // When compiling natively on Windows, PostMessage can be #define-d to 12 // something else. 13 #ifdef PostMessage 14 #undef PostMessage 15 #endif 16 17 // This is a simple C++ Pepper plugin that demonstrates HandleMessage and 18 // PostMessage. 19 20 // This object represents one time the page says <embed>. 21 class MyInstance : public pp::Instance { 22 public: 23 explicit MyInstance(PP_Instance instance) : pp::Instance(instance) {} 24 virtual ~MyInstance() {} 25 virtual void HandleMessage(const pp::Var& message_data); 26 }; 27 28 // HandleMessage gets invoked when postMessage is called on the DOM element 29 // associated with this plugin instance. 30 // In this case, if we are given a string, we'll post a message back to 31 // JavaScript indicating whether or not that string is a palindrome. 32 void MyInstance::HandleMessage(const pp::Var& message_data) { 33 if (message_data.is_string()) { 34 std::string string_copy(message_data.AsString()); 35 std::reverse(string_copy.begin(), string_copy.end()); 36 bool is_palindrome(message_data.AsString() == string_copy); 37 38 PostMessage(pp::Var(is_palindrome)); 39 } 40 } 41 42 // This object is the global object representing this plugin library as long 43 // as it is loaded. 44 class MyModule : public pp::Module { 45 public: 46 MyModule() : pp::Module() {} 47 virtual ~MyModule() {} 48 49 // Override CreateInstance to create your customized Instance object. 50 virtual pp::Instance* CreateInstance(PP_Instance instance) { 51 return new MyInstance(instance); 52 } 53 }; 54 55 namespace pp { 56 57 // Factory function for your specialization of the Module object. 58 Module* CreateModule() { 59 return new MyModule(); 60 } 61 62 } // namespace pp 63 64
