go-multiline-ny
This is the readline package supporting multi-lines that extends go-readline-ny
The new key-bindings
Key |
Feature |
Ctrl-M or Enter |
Insert a new line |
Ctrl-J or Ctrl-Enter |
Submit all lines |
Ctrl-P or Up |
Move the cursor to the next line |
Ctrl-N or Down |
Move the cursor to the next line |
Alt-P or Ctrl-Up |
Fetch the previous lines-set of the history |
Alt-N or Ctrl-Down |
Fetch the next lines-set of the history |
package main
import (
"context"
"fmt"
"io"
"os"
"strings"
"github.com/hymkor/go-multiline-ny"
"github.com/mattn/go-colorable"
)
func main() {
ctx := context.Background()
fmt.Println("Ctrl-M or Enter : Insert a linefeed")
fmt.Println("Ctrl-N or DOWN : Move to the next line")
fmt.Println("Ctrl-P or UP : Move to the previous line.")
fmt.Println("Ctrl-J or Ctrl-Enter : Submit")
fmt.Println("Ctrl-C : Cancel lines.")
fmt.Println("Ctrl-D with no chars : Quit.")
var editor multiline.Editor
editor.Prompt = func(w io.Writer, lnum int) (int, error) {
return fmt.Fprintf(w, "[%d] ", lnum+1)
}
// To enable escape sequence on Windows.
// (On other operating systems, it can be ommited)
editor.LineEditor.Writer = colorable.NewColorableStdout()
for {
lines, err := editor.Read(ctx)
if err != nil {
fmt.Fprintln(os.Stderr, err.Error())
return
}
fmt.Println("-----")
fmt.Println(strings.Join(lines, "\n"))
fmt.Println("-----")
}
}