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package main
import (
"bytes"
"context"
"encoding/binary"
"fmt"
"log"
"os"
"os/signal"
"syscall"
"github.com/mafredri/magic4linux/input"
"github.com/mafredri/magic4linux/m4p"
)
const (
broadcastPort = 42830
)
func main() {
ctx, cancel := signal.NotifyContext(context.Background(), os.Interrupt, syscall.SIGTERM)
defer cancel()
if err := run(ctx); err != nil {
panic(err)
}
}
func createInputs() (input.Keyboard, input.Mouse) {
keyboard, err := input.CreateKeyboard(input.InputType_uinput)
if err != nil {
panic(err)
}
mouse, err := input.CreateMouse(input.InputType_uinput)
if err != nil {
panic(err)
}
return keyboard, mouse
}
func discoverer() *m4p.Discoverer {
discoverer, err := m4p.NewDiscoverer(broadcastPort)
if err != nil {
panic(err)
}
return discoverer
}
func run(ctx context.Context) error {
keyboard, mouse := createInputs()
discoverer := discoverer()
defer discoverer.Close()
defer keyboard.Close()
defer mouse.Close()
for {
select {
case <-ctx.Done():
return nil
case device := <-discoverer.NextDevice():
err := process(ctx, device, keyboard, mouse)
if err != nil {
panic(err)
}
}
}
}
func process(ctx context.Context, dev m4p.DeviceInfo, keyboard input.Keyboard, mouse input.Mouse) error {
addr := fmt.Sprintf("%s:%d", dev.IPAddr, dev.Port)
log.Printf("Starting processing with Device: %s", addr)
client, err := m4p.Dial(ctx, addr)
if err != nil {
return err
}
defer client.Close()
for {
message, err := client.Recv(ctx)
if err != nil {
return err
}
switch message.Type {
case m4p.InputMessage:
processKey(message, keyboard)
case m4p.RemoteUpdateMessage:
processMouseMove(message, mouse)
case m4p.MouseMessage:
processMouseButtons(message, mouse)
case m4p.WheelMessage:
processMouseWheel(message, mouse)
default:
}
}
}
func processKey(message m4p.Message, keyboard input.Keyboard) {
key := message.Input.Parameters.KeyCode
switch key {
case m4p.KeyChannelUp:
key = input.KeyPageup
case m4p.KeyChannelDown:
key = input.KeyPagedown
case m4p.KeyLeft:
key = input.KeyLeft
case m4p.KeyUp:
key = input.KeyUp
case m4p.KeyRight:
key = input.KeyRight
case m4p.KeyDown:
key = input.KeyDown
case m4p.Key0:
key = input.Key0
case m4p.Key1:
key = input.Key1
case m4p.Key2:
key = input.Key2
case m4p.Key3:
key = input.Key3
case m4p.Key4:
key = input.Key4
case m4p.Key5:
key = input.Key5
case m4p.Key6:
key = input.Key6
case m4p.Key7:
key = input.Key7
case m4p.Key8:
key = input.Key8
case m4p.Key9:
key = input.Key9
case m4p.KeyPlay:
case m4p.KeyPause:
key = input.KeyPlaypause
case m4p.KeyBack:
key = input.KeyBackspace
}
if message.Input.Parameters.IsDown {
keyboard.KeyDown(key)
} else {
keyboard.KeyUp(key)
}
}
func processMouseButtons(message m4p.Message, mouse input.Mouse) {
switch message.Mouse.Type {
case "mousedown":
mouse.LeftPress()
case "mouseup":
mouse.LeftRelease()
}
}
func processMouseWheel(message m4p.Message, mouse input.Mouse) {
mouse.Wheel(false, message.Wheel.Delta/100)
}
func processMouseMove(message m4p.Message, mouse input.Mouse) {
r := bytes.NewReader(message.RemoteUpdate.Payload)
var returnValue, deviceID uint8
var coordinate [2]int32
var gyroscope, acceleration [3]float32
var quaternion [4]float32
for _, fn := range []func() error{
func() error { return binary.Read(r, binary.LittleEndian, &returnValue) },
func() error { return binary.Read(r, binary.LittleEndian, &deviceID) },
func() error { return binary.Read(r, binary.LittleEndian, coordinate[:]) },
func() error { return binary.Read(r, binary.LittleEndian, gyroscope[:]) },
func() error { return binary.Read(r, binary.LittleEndian, acceleration[:]) },
func() error { return binary.Read(r, binary.LittleEndian, quaternion[:]) },
} {
if err := fn(); err != nil {
log.Printf("connect: %s decode failed: %v", message.Type, err)
break
}
}
x := coordinate[0]
y := coordinate[1]
mouse.Move(x, y)
}
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