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Extract magic number in X10 mouse parser

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This commit is contained in:
Christian Rocha 2021-05-31 10:27:20 -04:00
parent 3256fae4d4
commit 955ce5c82c
1 changed files with 5 additions and 3 deletions
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8
mouse.go
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@ -64,7 +64,9 @@ func parseX10MouseEvent(buf []byte) (m MouseEvent, err error) {
return m, errors.New("not an X10 mouse event") return m, errors.New("not an X10 mouse event")
} }
e := buf[3] - 32 const byteOffset = 32
e := buf[3] - byteOffset
const ( const (
bitShift = 0b0000_0100 bitShift = 0b0000_0100
@ -119,8 +121,8 @@ func parseX10MouseEvent(buf []byte) (m MouseEvent, err error) {
} }
// (1,1) is the upper left. We subtract 1 to normalize it to (0,0). // (1,1) is the upper left. We subtract 1 to normalize it to (0,0).
m.X = int(buf[4]) - 32 - 1 m.X = int(buf[4]) - byteOffset - 1
m.Y = int(buf[5]) - 32 - 1 m.Y = int(buf[5]) - byteOffset - 1
return m, nil return m, nil
} }