1 /*
2  * Copyright (c) 2020-2021 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 #ifndef GRAPHIC_LITE_INPUT_EVENT_HUB_H
17 #define GRAPHIC_LITE_INPUT_EVENT_HUB_H
18 
19 #include <map>
20 #include "gfx_utils/input_event_info.h"
21 #include "input-event-codes.h"
22 #include "input_manager.h"
23 #include "securec.h"
24 
25 namespace OHOS {
26 /**
27  * @brief Hub of input event.
28  */
29 class InputEventHub {
30 using ReadCallback = void (*)(const RawEvent*);
31 public:
32     static InputEventHub* GetInstance();
33 
34     /**
35      * @brief SetUp hub. This operation will open all input devices.
36      *
37      */
38     void SetUp();
39 
40     /**
41      * @brief TearDown hub. This operation will close all input devices.
42      *
43      */
44     void TearDown();
45 
46     /**
47      * @brief Registration read callback.
48      *
49      * @param [in] callback callback of read callback.
50      *
51      * @returns return -1: register callback failed; return 0: register success.
52      */
RegisterReadCallback(const ReadCallback & callback)53     static int32_t RegisterReadCallback(const ReadCallback &callback)
54     {
55         if (callback == nullptr) {
56             return -1;
57         }
58         readCallback_ = callback;
59         return 0;
60     }
61 
62 private:
63     static InputDevType GetDeviceType(uint32_t devIndex);
64     static void EventCallback(const InputEventPackage **pkgs, uint32_t count, uint32_t devIndex);
65     uint8_t ScanInputDevice();
66     InputEventHub();
~InputEventHub()67     ~InputEventHub() {}
68 
69     InputEventHub(const InputEventHub&) = delete;
70     InputEventHub& operator=(const InputEventHub&) = delete;
71     InputEventHub(InputEventHub&&) = delete;
72     InputEventHub& operator=(InputEventHub&&) = delete;
73 
74     uint32_t mountDevIndex_[MAX_INPUT_DEVICE_NUM];
75     uint32_t openDev_;
76     RawEvent data_;
77 
78     static IInputInterface* inputInterface_;
79     static InputEventCb callback_;
80     static ReadCallback readCallback_;
81 };
82 } // namespace OHOS
83 #endif
84