1 /* 2 * Copyright (C) 2021 Huawei Device Co., Ltd. 3 * Licensed under the Apache License, Version 2.0 (the "License"); 4 * you may not use this file except in compliance with the License. 5 * You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software 10 * distributed under the License is distributed on an "AS IS" BASIS, 11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 * See the License for the specific language governing permissions and 13 * limitations under the License. 14 */ 15 16 /*! \file MessageHandler.h */ 17 #ifndef SERVICES_INCLUDE_MESSAGE_HANDLER_H 18 #define SERVICES_INCLUDE_MESSAGE_HANDLER_H 19 20 #include <queue> 21 #include <mutex> 22 #include <condition_variable> 23 #include "global.h" 24 #include "message_parcel.h" 25 #include "message.h" 26 27 namespace OHOS { 28 namespace MiscServices { 29 namespace MessageID { 30 enum { 31 // for system broadcast 32 MSG_ID_SYSTEM_START = 0, // system started 33 MSG_ID_SYSTEM_STOP, // system stopped 34 MSG_ID_USER_START, // a user started 35 MSG_ID_USER_STOP, // a user stopped 36 MSG_ID_USER_UNLOCK, // a user unlocked 37 MSG_ID_USER_REMOVED, // a user removed 38 MSG_ID_PACKAGE_ADDED, // a package is installed 39 MSG_ID_PACKAGE_REMOVED, // a package is removed 40 MSG_ID_SETTING_CHANGED, // input method setting is changed 41 42 // the request from client 43 MSG_ID_PREPARE_INPUT, // prepare input 44 MSG_ID_RELEASE_INPUT, // release input 45 MSG_ID_SET_CORE_AND_AGENT, 46 MSG_HIDE_CURRENT_INPUT, 47 MSG_SHOW_CURRENT_INPUT, 48 MSG_ID_SWITCH_INPUT_METHOD, // switch input method 49 50 // the request to handle the condition that the remote object died 51 MSG_ID_CLIENT_DIED, // input client died 52 MSG_ID_IMS_DIED, // input method service died 53 MSG_ID_DISABLE_IMS, // disable input method service 54 MSG_ID_RESTART_IMS, // restart input method service 55 MSG_ID_HIDE_KEYBOARD_SELF, // hide the current keyboard 56 MSG_ID_DISPLAY_OPTIONAL_INPUT_METHOD, 57 MSG_ID_START_INPUT_SERVICE, 58 59 MSG_ID_SHELL_COMMAND, // shell command 60 MSG_ID_EXIT_SERVICE, // exit service 61 62 // the request from IMSA to IMC 63 MSG_ID_INSERT_CHAR, 64 MSG_ID_DELETE_FORWARD, 65 MSG_ID_DELETE_BACKWARD, 66 MSG_ID_CLOSE, 67 MSG_ID_ON_INPUT_READY, 68 MSG_ID_SEND_KEYBOARD_STATUS, 69 MSG_ID_SEND_FUNCTION_KEY, 70 MSG_ID_MOVE_CURSOR, 71 MSG_ID_ON_SWITCH_INPUT, 72 MSG_ID_HANDLE_SET_SELECTION, 73 MSG_ID_HANDLE_EXTEND_ACTION, 74 MSG_ID_HANDLE_SELECT, 75 MSG_ID_GET_TEXT_BEFORE_CURSOR, 76 MSG_ID_GET_TEXT_AFTER_CURSOR, 77 78 // the request from IMSA to IMA 79 MSG_ID_SHOW_KEYBOARD, 80 MSG_ID_HIDE_KEYBOARD, 81 MSG_ID_STOP_INPUT_SERVICE, 82 MSG_ID_GET_KEYBOARD_WINDOW_HEIGHT, 83 MSG_ID_INIT_INPUT_CONTROL_CHANNEL, 84 MSG_ID_SET_SUBTYPE, 85 86 // the request from IMC to IMA 87 MSG_ID_ON_CURSOR_UPDATE, 88 MSG_ID_ON_SELECTION_CHANGE, 89 90 MSG_ID_QUIT_WORKER_THREAD, 91 }; 92 } 93 94 class MessageHandler { 95 public: 96 MessageHandler(); 97 ~MessageHandler(); 98 void SendMessage(Message *msg); 99 Message *GetMessage(); 100 static MessageHandler *Instance(); 101 102 private: 103 std::mutex mMutex; // a mutex to guard message queue 104 std::condition_variable mCV; // condition variable to work with mMutex 105 std::queue<Message*> mQueue; // Message queue, guarded by mMutex; 106 107 MessageHandler(const MessageHandler&); 108 MessageHandler& operator =(const MessageHandler&); 109 MessageHandler(const MessageHandler&&); 110 MessageHandler& operator =(const MessageHandler&&); 111 }; 112 } // namespace MiscServices 113 } // namespace OHOS 114 #endif // SERVICES_INCLUDE_MESSAGE_HANDLER_H 115