move server to server directory.

server/pkg/xinput/xinput.go

@@ -0,0 +1,122 @@
+/* custom xf86 input driver communication protocol */
+package xinput
+
+import (
+	"fmt"
+	"net"
+	"sync"
+	"time"
+)
+
+type driver struct {
+	mu     sync.Mutex
+	socket string
+	conn   net.Conn
+
+	debounceTouchIds map[uint32]time.Time
+}
+
+func NewDriver(socket string) Driver {
+	return &driver{
+		socket: socket,
+
+		debounceTouchIds: make(map[uint32]time.Time),
+	}
+}
+
+func (d *driver) Connect() error {
+	c, err := net.Dial("unix", d.socket)
+	if err != nil {
+		return err
+	}
+	d.conn = c
+	return nil
+}
+
+func (d *driver) Close() error {
+	return d.conn.Close()
+}
+
+func (d *driver) Debounce(duration time.Duration) {
+	d.mu.Lock()
+	defer d.mu.Unlock()
+
+	t := time.Now()
+	for touchId, start := range d.debounceTouchIds {
+		if t.Sub(start) < duration {
+			continue
+		}
+
+		msg := Message{
+			_type:   XI_TouchEnd,
+			touchId: touchId,
+			x:       -1,
+			y:       -1,
+		}
+		_, _ = d.conn.Write(msg.Pack())
+		delete(d.debounceTouchIds, touchId)
+	}
+}
+
+func (d *driver) TouchBegin(touchId uint32, x, y int, pressure uint8) error {
+	d.mu.Lock()
+	defer d.mu.Unlock()
+
+	if _, ok := d.debounceTouchIds[touchId]; ok {
+		return fmt.Errorf("debounced touch id %v", touchId)
+	}
+
+	d.debounceTouchIds[touchId] = time.Now()
+
+	msg := Message{
+		_type:    XI_TouchBegin,
+		touchId:  touchId,
+		x:        int32(x),
+		y:        int32(y),
+		pressure: pressure,
+	}
+	_, err := d.conn.Write(msg.Pack())
+	return err
+}
+
+func (d *driver) TouchUpdate(touchId uint32, x, y int, pressure uint8) error {
+	d.mu.Lock()
+	defer d.mu.Unlock()
+
+	if _, ok := d.debounceTouchIds[touchId]; !ok {
+		return fmt.Errorf("unknown touch id %v", touchId)
+	}
+
+	d.debounceTouchIds[touchId] = time.Now()
+
+	msg := Message{
+		_type:    XI_TouchUpdate,
+		touchId:  touchId,
+		x:        int32(x),
+		y:        int32(y),
+		pressure: pressure,
+	}
+	_, err := d.conn.Write(msg.Pack())
+	return err
+}
+
+func (d *driver) TouchEnd(touchId uint32, x, y int, pressure uint8) error {
+	d.mu.Lock()
+	defer d.mu.Unlock()
+
+	if _, ok := d.debounceTouchIds[touchId]; !ok {
+		return fmt.Errorf("unknown touch id %v", touchId)
+	}
+
+	delete(d.debounceTouchIds, touchId)
+
+	msg := Message{
+		_type:    XI_TouchEnd,
+		touchId:  touchId,
+		x:        int32(x),
+		y:        int32(y),
+		pressure: pressure,
+	}
+	_, err := d.conn.Write(msg.Pack())
+	return err
+}