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package main
import (
"bufio"
"encoding/base64"
"flag"
"fmt"
"github.com/gdamore/tcell/v2"
"io"
"log"
"os"
"syscall"
// "golang.org/x/sys/unix"
)
func encode(fname string, encoder io.WriteCloser) {
var f *os.File
var err error
if fname == "-" {
f = os.Stdin
} else {
if f, err = os.Open(fname); err != nil {
log.Fatalf("Failed to open file %v: %v", fname, err)
} else {
defer f.Close()
}
}
if _, err = io.Copy(encoder, f); err != nil {
log.Fatal(err)
}
}
func main() {
var fnames []string
flag.Usage = func() {
template := `Usage:
%s [file1 [...fileN]]
Copies file contents to system clipboard using the ANSI OSC52 escape sequence.
With no arguments, will read from stdin.
`
fmt.Fprintf(flag.CommandLine.Output(), template, os.Args[0])
}
pasteFlag := flag.Bool("paste", false, "paste operation")
flag.Parse()
if !*pasteFlag {
// copy
if len(flag.Args()) > 0 {
fnames = flag.Args()
} else {
fnames = []string{"-"}
}
// Open buffered output, using default max OSC52 length as buffer size
out := bufio.NewWriterSize(os.Stdout, 1000000)
// Start OSC52
fmt.Fprintf(out, "\033]52;c;")
b64 := base64.NewEncoder(base64.StdEncoding, out)
for _, fname := range fnames {
encode(fname, b64)
}
b64.Close()
// End OSC52
fmt.Fprintf(out, "\a")
out.Flush()
} else {
// paste
// Start OSC52
fmt.Printf("\033]52;c;?\a")
readFunc := func() (data []byte) {
var err error
tty, err := tcell.NewDevTty()
if err != nil {
fmt.Fprintln(os.Stderr, "ERROR: tcell.NewDevTty:", err)
return
}
defer func() {
if err = tty.Drain(); err != nil {
fmt.Fprintln(os.Stderr, "Drain error:", err)
}
if err = tty.Stop(); err != nil {
fmt.Fprintln(os.Stderr, "Drain error:", err)
}
if err = tty.Close(); err != nil {
fmt.Fprintln(os.Stderr, "Drain error:", err)
}
}()
if err = tty.Start(); err != nil {
fmt.Fprintln(os.Stderr, "Start error:", err)
}
ttyReader := bufio.NewReader(tty)
data, err = ttyReader.ReadBytes('\a')
if err != nil && err != syscall.EAGAIN {
fmt.Fprintln(os.Stderr, "Read error:", err)
return
}
return
}
buf := readFunc()
// fmt.Fprintln(os.Stderr, "Read", len(buf), "bytes")
fmt.Fprintf(os.Stderr, "Read %d bytes, %x\n", len(buf), buf)
// fmt.Fprintln(os.Stderr, "Read:", string(buf[:]))
// tty, err := os.OpenFile("/dev/tty", os.O_RDONLY, 0)
// if err != nil {
// fmt.Fprintln(os.Stderr, "Error opening /dev/tty:", err)
// return
// }
// defer tty.Close()
// // set nonblocking
// err = unix.SetNonblock(int(tty.Fd()), true)
// if err != nil {
// fmt.Fprintln(os.Stderr, "Error setting nonblock:", err)
// return
// }
// // Create a byte slice to read into
// buf := make([]byte, 1)
// for {
// // Try to read
// n, err := tty.Read(buf)
// if err != nil && err != syscall.EAGAIN {
// fmt.Fprintln(os.Stderr, "Read error:", err)
// return
// }
// // If we got some data, print it
// if n > 0 {
// fmt.Fprintln(os.Stderr, "Read:", string(buf[:n]))
// if buf[0] == byte('\a') {
// fmt.Fprintln(os.Stderr, "END")
// break
// }
// }
// }
}
}
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