project structure refactoring

hid/mouse.go

@@ -0,0 +1,102 @@
+package hid
+
+import (
+	"encoding/binary"
+	"errors"
+	"os"
+	"time"
+
+	log "github.com/sirupsen/logrus"
+)
+
+func (h *Hid) Mouse(queue <-chan []int) {
+	for event := range queue {
+		h.mouseMutex.Lock()
+		switch event[0] {
+		case MouseDown:
+			h.mouseDown(event)
+		case MouseUp:
+			h.mouseUp()
+		case MouseMoveAbsolute:
+			h.mouseMoveAbsolute(event)
+		case MouseMoveRelative:
+			h.mouseMoveRelative(event)
+		case MouseScroll:
+			h.scroll(event)
+		default:
+			log.Debugf("invalid mouse event: %+v", event)
+		}
+		h.mouseMutex.Unlock()
+	}
+}
+
+func (h *Hid) mouseDown(event []int) {
+	var button byte
+
+	switch event[1] {
+	case MouseLeft:
+		button = HidMouseLeft
+	case MouseRight:
+		button = HidMouseRight
+	case MouseWheel:
+		button = HidMouseWheel
+	default:
+		log.Debugf("invalid mouse button: %+v", event)
+		return
+	}
+
+	data := []byte{button, 0, 0, 0}
+	h.writeWithTimeout(h.g1, data)
+}
+
+func (h *Hid) mouseUp() {
+	data := []byte{0, 0, 0, 0}
+	h.writeWithTimeout(h.g1, data)
+}
+
+func (h *Hid) scroll(event []int) {
+	direction := 0x01
+	if event[3] > 0 {
+		direction = -0x1
+	}
+
+	data := []byte{0, 0, 0, byte(direction)}
+	h.writeWithTimeout(h.g1, data)
+}
+
+func (h *Hid) mouseMoveAbsolute(event []int) {
+	x := make([]byte, 2)
+	y := make([]byte, 2)
+	binary.LittleEndian.PutUint16(x, uint16(event[2]))
+	binary.LittleEndian.PutUint16(y, uint16(event[3]))
+
+	data := []byte{0, x[0], x[1], y[0], y[1], 0}
+	h.writeWithTimeout(h.g2, data)
+}
+
+func (h *Hid) mouseMoveRelative(event []int) {
+	data := []byte{byte(event[1]), byte(event[2]), byte(event[3]), 0}
+	h.writeWithTimeout(h.g1, data)
+}
+
+func (h *Hid) writeWithTimeout(file *os.File, data []byte) {
+	deadline := time.Now().Add(8 * time.Millisecond)
+	_ = file.SetWriteDeadline(deadline)
+
+	_, err := file.Write(data)
+	if err != nil {
+		switch {
+		case errors.Is(err, os.ErrClosed):
+			log.Tracef("hid already closed, reopen it...")
+			h.OpenNoLock()
+		case errors.Is(err, os.ErrDeadlineExceeded):
+			log.Tracef("write to hid timeout")
+		default:
+			log.Errorf("write to hid failed: %s", err)
+		}
+
+		return
+	}
+
+	log.Tracef("write to hid: %+v", data)
+}