1 /* 2 * Copyright (C) 2021-2025 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 #ifndef INPUTMETHOD_MESSAGE_HANDLER_H 17 #define INPUTMETHOD_MESSAGE_HANDLER_H 18 19 #include <condition_variable> 20 #include <mutex> 21 #include <queue> 22 23 #include "global.h" 24 #include "message.h" 25 #include "message_parcel.h" 26 27 namespace OHOS { 28 namespace MiscServices { 29 namespace MessageID { 30 enum { 31 MSG_ID_USER_START = 0, // a user started 32 MSG_ID_USER_REMOVED, // a user removed 33 MSG_ID_PACKAGE_REMOVED, // a package is removed 34 MSG_ID_BUNDLE_SCAN_FINISHED, // bundle scan finished 35 MSG_ID_DATA_SHARE_READY, // datashare ready, ready to create data share helper 36 MSG_ID_PACKAGE_ADDED, 37 MSG_ID_PACKAGE_CHANGED, 38 MSG_ID_SYS_LANGUAGE_CHANGED, 39 MSG_ID_OS_ACCOUNT_STARTED, 40 MSG_ID_BOOT_COMPLETED, 41 MSG_ID_USER_UNLOCKED, 42 MSG_ID_SELECT_BY_RANGE, 43 MSG_ID_SELECT_BY_MOVEMENT, 44 MSG_ID_HANDLE_EXTEND_ACTION, 45 MSG_ID_USER_STOP, 46 47 MSG_ID_HIDE_KEYBOARD_SELF, // hide the current keyboard 48 49 // the request from IMSA to IMC 50 MSG_ID_INSERT_CHAR, 51 MSG_ID_DELETE_FORWARD, 52 MSG_ID_DELETE_BACKWARD, 53 MSG_ID_ON_INPUT_STOP, 54 MSG_ID_SEND_KEYBOARD_STATUS, 55 MSG_ID_SEND_FUNCTION_KEY, 56 MSG_ID_MOVE_CURSOR, 57 MSG_ID_ON_SWITCH_INPUT, 58 MSG_ID_GET_TEXT_INDEX_AT_CURSOR, 59 MSG_ID_GET_TEXT_BEFORE_CURSOR, 60 MSG_ID_GET_TEXT_AFTER_CURSOR, 61 MSG_ID_ON_PANEL_STATUS_CHANGE, 62 63 // the request from IMSA to IMA 64 MSG_ID_INIT_INPUT_CONTROL_CHANNEL, 65 MSG_ID_SET_SUBTYPE, 66 67 // the request from IMC to IMA 68 MSG_ID_ON_CURSOR_UPDATE, 69 MSG_ID_ON_SELECTION_CHANGE, 70 MSG_ID_ON_CONFIGURATION_CHANGE, 71 MSG_ID_ON_ATTRIBUTE_CHANGE, 72 MSG_ID_QUIT_WORKER_THREAD, 73 MSG_ID_SET_COREANDANGENT, 74 }; 75 } 76 77 class MessageHandler { 78 public: 79 MessageHandler(); 80 ~MessageHandler(); 81 void SendMessage(Message *msg); 82 Message *GetMessage(); 83 static MessageHandler *Instance(); 84 static std::mutex handlerMutex_; 85 86 private: 87 std::mutex mMutex; // a mutex to guard message queue 88 std::condition_variable mCV; // condition variable to work with mMutex 89 std::queue<Message *> mQueue; // Message queue, guarded by mMutex; 90 91 MessageHandler(const MessageHandler &); 92 MessageHandler &operator=(const MessageHandler &); 93 MessageHandler(const MessageHandler &&); 94 MessageHandler &operator=(const MessageHandler &&); 95 }; 96 } // namespace MiscServices 97 } // namespace OHOS 98 #endif // INPUTMETHOD_MESSAGE_HANDLER_H 99