70 lines
2.1 KiB
Go
70 lines
2.1 KiB
Go
package device
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import (
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"encoding/binary"
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"fmt"
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"time"
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)
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// Touch immediately forwards an event on the persistent scrcpy connection.
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// It never launches an adb shell or waits for a complete gesture.
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func (s *Service) Touch(req TouchRequest) error {
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if req.Action < 0 || req.Action > 3 || req.Width < 1 || req.Height < 1 || req.Width > 65535 || req.Height > 65535 || req.X < 0 || req.Y < 0 || req.X >= req.Width || req.Y >= req.Height {
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return fmt.Errorf("触摸事件或画面坐标无效")
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}
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st := s.ensureStream()
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st.mu.Lock()
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defer st.mu.Unlock()
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if !st.running || st.serial != req.DeviceID || st.controlConn == nil {
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return fmt.Errorf("控制通道未连接，请重新开始预览")
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}
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if req.Action != 0 && !st.touchDown {
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return nil
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}
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if req.Action == 0 && st.touchDown {
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cancel := st.lastTouch
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cancel.Action = 3
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if err := st.writeTouchLocked(cancel); err != nil {
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return err
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}
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}
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if err := st.writeTouchLocked(req); err != nil {
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return fmt.Errorf("发送触摸事件失败，请重新开始预览: %w", err)
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}
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st.lastTouch = req
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st.touchDown = req.Action == 0 || req.Action == 2
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return nil
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}
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// scrcpy 5 INJECT_TOUCH_EVENT: 32 bytes, big endian. Generic finger id=-2.
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func encodeTouch(req TouchRequest) []byte {
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packet := make([]byte, 32)
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packet[0] = 2
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packet[1] = byte(req.Action)
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binary.BigEndian.PutUint64(packet[2:10], ^uint64(1))
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binary.BigEndian.PutUint32(packet[10:14], uint32(req.X))
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binary.BigEndian.PutUint32(packet[14:18], uint32(req.Y))
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binary.BigEndian.PutUint16(packet[18:20], uint16(req.Width))
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binary.BigEndian.PutUint16(packet[20:22], uint16(req.Height))
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if req.Action == 0 || req.Action == 2 {
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binary.BigEndian.PutUint16(packet[22:24], 65535)
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}
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return packet
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}
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func (st *previewStream) writeTouchLocked(req TouchRequest) error {
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_ = st.controlConn.SetWriteDeadline(time.Now().Add(500 * time.Millisecond))
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data := encodeTouch(req)
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for len(data) > 0 {
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n, err := st.controlConn.Write(data)
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if err != nil {
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return err
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}
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if n == 0 {
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return fmt.Errorf("控制通道写入中断")
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}
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data = data[n:]
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}
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return nil
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}
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