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/*
* Copyright (C) 2020 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "UinputDevice.h"
#include <android-base/stringprintf.h>
#include <fcntl.h>
namespace android {
// --- UinputDevice ---
UinputDevice::UinputDevice(const char* name) : mName(name) {}
UinputDevice::~UinputDevice() {
if (ioctl(mDeviceFd, UI_DEV_DESTROY)) {
ALOGE("Error while destroying uinput device: %s", strerror(errno));
}
mDeviceFd.reset();
}
void UinputDevice::init() {
mDeviceFd = android::base::unique_fd(open("/dev/uinput", O_WRONLY | O_NONBLOCK | O_CLOEXEC));
if (mDeviceFd < 0) {
FAIL() << "Can't open /dev/uinput :" << strerror(errno);
}
struct uinput_user_dev device = {};
strlcpy(device.name, mName, UINPUT_MAX_NAME_SIZE);
device.id.bustype = BUS_USB;
device.id.vendor = 0x01;
device.id.product = 0x01;
device.id.version = 1;
ASSERT_NO_FATAL_FAILURE(configureDevice(mDeviceFd, &device));
if (write(mDeviceFd, &device, sizeof(device)) < 0) {
FAIL() << "Could not write uinput_user_dev struct into uinput file descriptor: "
<< strerror(errno);
}
if (ioctl(mDeviceFd, UI_DEV_CREATE)) {
FAIL() << "Error in ioctl : UI_DEV_CREATE: " << strerror(errno);
}
}
void UinputDevice::injectEvent(uint16_t type, uint16_t code, int32_t value) {
struct input_event event = {};
event.type = type;
event.code = code;
event.value = value;
event.time = {}; // uinput ignores the timestamp
if (write(mDeviceFd, &event, sizeof(input_event)) < 0) {
std::string msg = base::StringPrintf("Could not write event %" PRIu16 " %" PRIu16
" with value %" PRId32 " : %s",
type, code, value, strerror(errno));
ALOGE("%s", msg.c_str());
FAIL() << msg.c_str();
}
}
// --- UinputKeyboard ---
UinputKeyboard::UinputKeyboard(std::initializer_list<int> keys)
: UinputDevice(UinputKeyboard::KEYBOARD_NAME), mKeys(keys.begin(), keys.end()) {}
void UinputKeyboard::configureDevice(int fd, uinput_user_dev* device) {
// enable key press/release event
if (ioctl(fd, UI_SET_EVBIT, EV_KEY)) {
FAIL() << "Error in ioctl : UI_SET_EVBIT : EV_KEY: " << strerror(errno);
}
// enable set of KEY events
std::for_each(mKeys.begin(), mKeys.end(), [fd](int key) {
if (ioctl(fd, UI_SET_KEYBIT, key)) {
FAIL() << "Error in ioctl : UI_SET_KEYBIT : " << key << " : " << strerror(errno);
}
});
// enable synchronization event
if (ioctl(fd, UI_SET_EVBIT, EV_SYN)) {
FAIL() << "Error in ioctl : UI_SET_EVBIT : EV_SYN: " << strerror(errno);
}
}
void UinputKeyboard::pressKey(int key) {
if (mKeys.find(key) == mKeys.end()) {
FAIL() << mName << ": Cannot inject key press: Key not found: " << key;
}
injectEvent(EV_KEY, key, 1);
injectEvent(EV_SYN, SYN_REPORT, 0);
}
void UinputKeyboard::releaseKey(int key) {
if (mKeys.find(key) == mKeys.end()) {
FAIL() << mName << ": Cannot inject key release: Key not found: " << key;
}
injectEvent(EV_KEY, key, 0);
injectEvent(EV_SYN, SYN_REPORT, 0);
}
void UinputKeyboard::pressAndReleaseKey(int key) {
pressKey(key);
releaseKey(key);
}
// --- UinputHomeKey ---
UinputHomeKey::UinputHomeKey() : UinputKeyboard({KEY_HOME}) {}
void UinputHomeKey::pressAndReleaseHomeKey() {
pressAndReleaseKey(KEY_HOME);
}
// --- UinputSteamController
UinputSteamController::UinputSteamController() : UinputKeyboard({BTN_GEAR_DOWN, BTN_GEAR_UP}) {}
// --- UinputTouchScreen ---
UinputTouchScreen::UinputTouchScreen(const Rect* size)
: UinputDevice(UinputTouchScreen::DEVICE_NAME), mSize(*size) {}
void UinputTouchScreen::configureDevice(int fd, uinput_user_dev* device) {
// Setup the touch screen device
ioctl(fd, UI_SET_EVBIT, EV_KEY);
ioctl(fd, UI_SET_EVBIT, EV_REL);
ioctl(fd, UI_SET_EVBIT, EV_ABS);
ioctl(fd, UI_SET_ABSBIT, ABS_MT_SLOT);
ioctl(fd, UI_SET_ABSBIT, ABS_MT_TOUCH_MAJOR);
ioctl(fd, UI_SET_ABSBIT, ABS_MT_POSITION_X);
ioctl(fd, UI_SET_ABSBIT, ABS_MT_POSITION_Y);
ioctl(fd, UI_SET_ABSBIT, ABS_MT_TRACKING_ID);
ioctl(fd, UI_SET_ABSBIT, ABS_MT_TOOL_TYPE);
ioctl(fd, UI_SET_PROPBIT, INPUT_PROP_DIRECT);
ioctl(fd, UI_SET_KEYBIT, BTN_TOUCH);
device->absmin[ABS_MT_SLOT] = RAW_SLOT_MIN;
device->absmax[ABS_MT_SLOT] = RAW_SLOT_MAX;
device->absmin[ABS_MT_TOUCH_MAJOR] = RAW_TOUCH_MIN;
device->absmax[ABS_MT_TOUCH_MAJOR] = RAW_TOUCH_MAX;
device->absmin[ABS_MT_POSITION_X] = mSize.left;
device->absmax[ABS_MT_POSITION_X] = mSize.right - 1;
device->absmin[ABS_MT_POSITION_Y] = mSize.top;
device->absmax[ABS_MT_POSITION_Y] = mSize.bottom - 1;
device->absmin[ABS_MT_TRACKING_ID] = RAW_ID_MIN;
device->absmax[ABS_MT_TRACKING_ID] = RAW_ID_MAX;
}
void UinputTouchScreen::sendSlot(int32_t slot) {
injectEvent(EV_ABS, ABS_MT_SLOT, slot);
}
void UinputTouchScreen::sendTrackingId(int32_t trackingId) {
injectEvent(EV_ABS, ABS_MT_TRACKING_ID, trackingId);
}
void UinputTouchScreen::sendDown(const Point& point) {
injectEvent(EV_KEY, BTN_TOUCH, 1);
injectEvent(EV_ABS, ABS_MT_POSITION_X, point.x);
injectEvent(EV_ABS, ABS_MT_POSITION_Y, point.y);
}
void UinputTouchScreen::sendMove(const Point& point) {
injectEvent(EV_ABS, ABS_MT_POSITION_X, point.x);
injectEvent(EV_ABS, ABS_MT_POSITION_Y, point.y);
}
void UinputTouchScreen::sendPointerUp() {
sendTrackingId(0xffffffff);
}
void UinputTouchScreen::sendUp() {
sendTrackingId(0xffffffff);
injectEvent(EV_KEY, BTN_TOUCH, 0);
}
void UinputTouchScreen::sendToolType(int32_t toolType) {
injectEvent(EV_ABS, ABS_MT_TOOL_TYPE, toolType);
}
void UinputTouchScreen::sendSync() {
injectEvent(EV_SYN, SYN_REPORT, 0);
}
// Get the center x, y base on the range definition.
const Point UinputTouchScreen::getCenterPoint() {
return Point(mSize.left + mSize.width() / 2, mSize.top + mSize.height() / 2);
}
} // namespace android
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