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Prabir Pradhane0105c92019-12-26 12:32:13 -08001/*
2 * Copyright (C) 2020 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#include "UinputDevice.h"
18
19#include <android-base/stringprintf.h>
20
21namespace android {
22
23// --- UinputDevice ---
24
25UinputDevice::UinputDevice(const char* name) : mName(name) {}
26
27UinputDevice::~UinputDevice() {
28 if (ioctl(mDeviceFd, UI_DEV_DESTROY)) {
29 ALOGE("Error while destroying uinput device: %s", strerror(errno));
30 }
31 mDeviceFd.reset();
32}
33
34void UinputDevice::init() {
35 mDeviceFd = android::base::unique_fd(open("/dev/uinput", O_WRONLY | O_NONBLOCK));
36 if (mDeviceFd < 0) {
37 FAIL() << "Can't open /dev/uinput :" << strerror(errno);
38 }
39
40 struct uinput_user_dev device = {};
41 strlcpy(device.name, mName, UINPUT_MAX_NAME_SIZE);
42 device.id.bustype = BUS_USB;
43 device.id.vendor = 0x01;
44 device.id.product = 0x01;
45 device.id.version = 1;
46
Siarhei Vishniakoue5b5e452020-04-02 17:59:16 -070047 ASSERT_NO_FATAL_FAILURE(configureDevice(mDeviceFd, &device));
Prabir Pradhane0105c92019-12-26 12:32:13 -080048
49 if (write(mDeviceFd, &device, sizeof(device)) < 0) {
50 FAIL() << "Could not write uinput_user_dev struct into uinput file descriptor: "
51 << strerror(errno);
52 }
53
54 if (ioctl(mDeviceFd, UI_DEV_CREATE)) {
55 FAIL() << "Error in ioctl : UI_DEV_CREATE: " << strerror(errno);
56 }
57}
58
59void UinputDevice::injectEvent(uint16_t type, uint16_t code, int32_t value) {
60 struct input_event event = {};
61 event.type = type;
62 event.code = code;
63 event.value = value;
64 event.time = {}; // uinput ignores the timestamp
65
66 if (write(mDeviceFd, &event, sizeof(input_event)) < 0) {
67 std::string msg = base::StringPrintf("Could not write event %" PRIu16 " %" PRIu16
68 " with value %" PRId32 " : %s",
69 type, code, value, strerror(errno));
70 ALOGE("%s", msg.c_str());
Siarhei Vishniakoue5b5e452020-04-02 17:59:16 -070071 FAIL() << msg.c_str();
Prabir Pradhane0105c92019-12-26 12:32:13 -080072 }
73}
74
75// --- UinputKeyboard ---
76
77UinputKeyboard::UinputKeyboard(std::initializer_list<int> keys)
78 : UinputDevice(UinputKeyboard::KEYBOARD_NAME), mKeys(keys.begin(), keys.end()) {}
79
80void UinputKeyboard::configureDevice(int fd, uinput_user_dev* device) {
81 // enable key press/release event
82 if (ioctl(fd, UI_SET_EVBIT, EV_KEY)) {
Siarhei Vishniakoue5b5e452020-04-02 17:59:16 -070083 FAIL() << "Error in ioctl : UI_SET_EVBIT : EV_KEY: " << strerror(errno);
Prabir Pradhane0105c92019-12-26 12:32:13 -080084 }
85
86 // enable set of KEY events
87 std::for_each(mKeys.begin(), mKeys.end(), [fd](int key) {
88 if (ioctl(fd, UI_SET_KEYBIT, key)) {
Siarhei Vishniakoue5b5e452020-04-02 17:59:16 -070089 FAIL() << "Error in ioctl : UI_SET_KEYBIT : " << key << " : " << strerror(errno);
Prabir Pradhane0105c92019-12-26 12:32:13 -080090 }
91 });
92
93 // enable synchronization event
94 if (ioctl(fd, UI_SET_EVBIT, EV_SYN)) {
Siarhei Vishniakoue5b5e452020-04-02 17:59:16 -070095 FAIL() << "Error in ioctl : UI_SET_EVBIT : EV_SYN: " << strerror(errno);
Prabir Pradhane0105c92019-12-26 12:32:13 -080096 }
97}
98
99void UinputKeyboard::pressKey(int key) {
100 if (mKeys.find(key) == mKeys.end()) {
Siarhei Vishniakoue5b5e452020-04-02 17:59:16 -0700101 FAIL() << mName << ": Cannot inject key press: Key not found: " << key;
Prabir Pradhane0105c92019-12-26 12:32:13 -0800102 }
Siarhei Vishniakoue5b5e452020-04-02 17:59:16 -0700103 injectEvent(EV_KEY, key, 1);
104 injectEvent(EV_SYN, SYN_REPORT, 0);
Prabir Pradhane0105c92019-12-26 12:32:13 -0800105}
106
107void UinputKeyboard::releaseKey(int key) {
108 if (mKeys.find(key) == mKeys.end()) {
Siarhei Vishniakoue5b5e452020-04-02 17:59:16 -0700109 FAIL() << mName << ": Cannot inject key release: Key not found: " << key;
Prabir Pradhane0105c92019-12-26 12:32:13 -0800110 }
Siarhei Vishniakoue5b5e452020-04-02 17:59:16 -0700111 injectEvent(EV_KEY, key, 0);
112 injectEvent(EV_SYN, SYN_REPORT, 0);
Prabir Pradhane0105c92019-12-26 12:32:13 -0800113}
114
115void UinputKeyboard::pressAndReleaseKey(int key) {
Siarhei Vishniakoue5b5e452020-04-02 17:59:16 -0700116 pressKey(key);
117 releaseKey(key);
Prabir Pradhane0105c92019-12-26 12:32:13 -0800118}
119
Arthur Hungaab25622020-01-16 11:22:11 +0800120// --- UinputHomeKey ---
Prabir Pradhane0105c92019-12-26 12:32:13 -0800121
122UinputHomeKey::UinputHomeKey() : UinputKeyboard({KEY_HOME}) {}
123
124void UinputHomeKey::pressAndReleaseHomeKey() {
Siarhei Vishniakoue5b5e452020-04-02 17:59:16 -0700125 pressAndReleaseKey(KEY_HOME);
Prabir Pradhane0105c92019-12-26 12:32:13 -0800126}
127
Arthur Hungaab25622020-01-16 11:22:11 +0800128// --- UinputTouchScreen ---
129UinputTouchScreen::UinputTouchScreen(const Rect* size)
130 : UinputDevice(UinputTouchScreen::DEVICE_NAME), mSize(*size) {}
131
132void UinputTouchScreen::configureDevice(int fd, uinput_user_dev* device) {
133 // Setup the touch screen device
134 ioctl(fd, UI_SET_EVBIT, EV_KEY);
135 ioctl(fd, UI_SET_EVBIT, EV_REL);
136 ioctl(fd, UI_SET_EVBIT, EV_ABS);
137 ioctl(fd, UI_SET_ABSBIT, ABS_MT_SLOT);
138 ioctl(fd, UI_SET_ABSBIT, ABS_MT_TOUCH_MAJOR);
139 ioctl(fd, UI_SET_ABSBIT, ABS_MT_POSITION_X);
140 ioctl(fd, UI_SET_ABSBIT, ABS_MT_POSITION_Y);
141 ioctl(fd, UI_SET_ABSBIT, ABS_MT_TRACKING_ID);
142 ioctl(fd, UI_SET_ABSBIT, ABS_MT_TOOL_TYPE);
143 ioctl(fd, UI_SET_PROPBIT, INPUT_PROP_DIRECT);
144 ioctl(fd, UI_SET_KEYBIT, BTN_TOUCH);
145
146 device->absmin[ABS_MT_SLOT] = RAW_SLOT_MIN;
147 device->absmax[ABS_MT_SLOT] = RAW_SLOT_MAX;
148 device->absmin[ABS_MT_TOUCH_MAJOR] = RAW_TOUCH_MIN;
149 device->absmax[ABS_MT_TOUCH_MAJOR] = RAW_TOUCH_MAX;
150 device->absmin[ABS_MT_POSITION_X] = mSize.left;
151 device->absmax[ABS_MT_POSITION_X] = mSize.right - 1;
152 device->absmin[ABS_MT_POSITION_Y] = mSize.top;
153 device->absmax[ABS_MT_POSITION_Y] = mSize.bottom - 1;
154 device->absmin[ABS_MT_TRACKING_ID] = RAW_ID_MIN;
155 device->absmax[ABS_MT_TRACKING_ID] = RAW_ID_MAX;
156}
157
158void UinputTouchScreen::sendSlot(int32_t slot) {
Siarhei Vishniakoue5b5e452020-04-02 17:59:16 -0700159 injectEvent(EV_ABS, ABS_MT_SLOT, slot);
Arthur Hungaab25622020-01-16 11:22:11 +0800160}
161
162void UinputTouchScreen::sendTrackingId(int32_t trackingId) {
Siarhei Vishniakoue5b5e452020-04-02 17:59:16 -0700163 injectEvent(EV_ABS, ABS_MT_TRACKING_ID, trackingId);
Arthur Hungaab25622020-01-16 11:22:11 +0800164}
165
166void UinputTouchScreen::sendDown(const Point& point) {
Siarhei Vishniakoue5b5e452020-04-02 17:59:16 -0700167 injectEvent(EV_KEY, BTN_TOUCH, 1);
168 injectEvent(EV_ABS, ABS_MT_POSITION_X, point.x);
169 injectEvent(EV_ABS, ABS_MT_POSITION_Y, point.y);
170 injectEvent(EV_SYN, SYN_REPORT, 0);
Arthur Hungaab25622020-01-16 11:22:11 +0800171}
172
173void UinputTouchScreen::sendMove(const Point& point) {
Siarhei Vishniakoue5b5e452020-04-02 17:59:16 -0700174 injectEvent(EV_ABS, ABS_MT_POSITION_X, point.x);
175 injectEvent(EV_ABS, ABS_MT_POSITION_Y, point.y);
176 injectEvent(EV_SYN, SYN_REPORT, 0);
Arthur Hungaab25622020-01-16 11:22:11 +0800177}
178
179void UinputTouchScreen::sendUp() {
180 sendTrackingId(0xffffffff);
Siarhei Vishniakoue5b5e452020-04-02 17:59:16 -0700181 injectEvent(EV_KEY, BTN_TOUCH, 0);
182 injectEvent(EV_SYN, SYN_REPORT, 0);
Arthur Hungaab25622020-01-16 11:22:11 +0800183}
184
185void UinputTouchScreen::sendToolType(int32_t toolType) {
Siarhei Vishniakoue5b5e452020-04-02 17:59:16 -0700186 injectEvent(EV_ABS, ABS_MT_TOOL_TYPE, toolType);
187 injectEvent(EV_SYN, SYN_REPORT, 0);
Arthur Hungaab25622020-01-16 11:22:11 +0800188}
189
190// Get the center x, y base on the range definition.
191const Point UinputTouchScreen::getCenterPoint() {
192 return Point(mSize.left + mSize.width() / 2, mSize.top + mSize.height() / 2);
193}
194
Prabir Pradhane0105c92019-12-26 12:32:13 -0800195} // namespace android