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 FM_IMMS_PROJECT_MESSAGEHANDLER_H 18 #define FM_IMMS_PROJECT_MESSAGEHANDLER_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_LOCK, // a user locked 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_START_INPUT, // start input 45 MSG_ID_STOP_INPUT, // stop input 46 MSG_ID_RELEASE_INPUT, // release input 47 MSG_ID_SET_CORE_AND_AGENT, 48 MSG_HIDE_CURRENT_INPUT, 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_ADVANCE_TO_NEXT, // switch to next 58 MSG_ID_SET_DISPLAY_MODE, // set display mode 59 60 MSG_ID_SHELL_COMMAND, // shell command 61 MSG_ID_EXIT_SERVICE, // exit service 62 63 // the request from IMSA to IMC 64 MSG_ID_INSERT_CHAR, 65 MSG_ID_DELETE_FORWARD, 66 MSG_ID_DELETE_BACKWARD, 67 MSG_ID_CLOSE, 68 MSG_ID_ON_INPUT_READY, 69 MSG_ID_SEND_KEYBOARD_STATUS, 70 MSG_ID_SEND_FUNCTION_KEY, 71 MSG_ID_MOVE_CURSOR, 72 73 // the request from IMSA to IMA 74 MSG_ID_SET_CLIENT_STATE, 75 MSG_ID_SHOW_KEYBOARD, 76 MSG_ID_INITIALIZE_INPUT, 77 MSG_ID_HIDE_KEYBOARD, 78 MSG_ID_SET_KEYBOARD_TYPE, 79 MSG_ID_START_INPUT_SERVICE, 80 MSG_ID_STOP_INPUT_SERVICE, 81 MSG_ID_GET_KEYBOARD_WINDOW_HEIGHT, 82 MSG_ID_INIT_INPUT_CONTROL_CHANNEL, 83 84 // the request from IMC to IMA 85 MSG_ID_ON_CURSOR_UPDATE, 86 MSG_ID_ON_SELECTION_CHANGE, 87 }; 88 } 89 90 class MessageHandler { 91 public: 92 MessageHandler(); 93 ~MessageHandler(); 94 void SendMessage(Message *msg); 95 Message *GetMessage(); 96 static MessageHandler *Instance(); 97 98 private: 99 std::mutex mMutex; // a mutex to guard message queue 100 std::condition_variable mCV; // condition variable to work with mMutex 101 std::queue<Message*> mQueue; // Message queue, guarded by mMutex; 102 103 MessageHandler(const MessageHandler&); 104 MessageHandler& operator =(const MessageHandler&); 105 MessageHandler(const MessageHandler&&); 106 MessageHandler& operator =(const MessageHandler&&); 107 }; 108 } 109 } 110 #endif // FM_IMMS_PROJECT_MESSAGEHANDLER_H 111