forked from sugyan/ttygif
/
play.go
64 lines (60 loc) · 1.03 KB
/
play.go
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package main
import (
"github.com/sugyan/ttyread"
"io"
"os"
"os/exec"
)
// Play reads ttyrecord file and play (write to STDOUT)
func Play(filename string, capture func(ttyread.TimeVal) error) (err error) {
file, err := os.Open(filename)
if err != nil {
return
}
defer file.Close()
defer clearScreen()
var prevTv *ttyread.TimeVal
reader := ttyread.NewTtyReader(file)
for {
// read
var data *ttyread.TtyData
data, err = reader.ReadData()
if err != nil {
if err == io.EOF {
break
} else {
return
}
}
// calc delay
var diff ttyread.TimeVal
if prevTv == nil {
err = clearScreen()
if err != nil {
return
}
} else {
diff = data.TimeVal.Subtract(*prevTv)
}
prevTv = &data.TimeVal
// capture
err = capture(diff)
if err != nil {
return
}
// play
_, err = os.Stdout.Write(*data.Buffer)
if err != nil {
return
}
}
return nil
}
func clearScreen() (err error) {
bytes, err := exec.Command("clear").Output()
if err != nil {
return
}
os.Stdout.Write(bytes)
return nil
}