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