package main

import (
    "context"
    "fmt"
    "io"
    "os"
    "strings"

    "github.com/hymkor/go-multiline-ny"
    "github.com/mattn/go-colorable"
    "github.com/nyaosorg/go-readline-ny"
    "github.com/nyaosorg/go-readline-ny/simplehistory"
)

func main() {
    ctx := context.Background()
    fmt.Println("C-m or Enter      : Insert a linefeed")
    fmt.Println("C-p or UP         : Move to the previous line.")
    fmt.Println("C-n or DOWN       : Move to the next line")
    fmt.Println("C-j or Esc Enter  : Submit")
    fmt.Println("C-c               : Abort.")
    fmt.Println("C-D with no chars : Quit.")
    fmt.Println("C-UP   or M-P     : Move to the previous history entry")
    fmt.Println("C-DOWN or M-N     : Move to the next history entry")

    var ed multiline.Editor
    ed.SetPrompt(func(w io.Writer, lnum int) (int, error) {
        return fmt.Fprintf(w, "[%d] ", lnum 1)
    })
    ed.SetPredictColor(readline.PredictColorBlueItalic)

    // To enable escape sequence on Windows.
    // (On other operating systems, it can be ommited)
    ed.SetWriter(colorable.NewColorableStdout())

    history := simplehistory.New()
    ed.SetHistory(history)
    ed.SetHistoryCycling(true)

    for {
        lines, err := ed.Read(ctx)
        if err != nil {
            fmt.Fprintln(os.Stderr, err.Error())
            return
        }
        L := strings.Join(lines, "\n")
        fmt.Println("-----")
        fmt.Println(L)
        fmt.Println("-----")
        history.Add(L)
    }
}

package main

import (
    "context"
    "fmt"
    "io"
    "os"
    "strings"

    "github.com/hymkor/go-multiline-ny"
    "github.com/mattn/go-colorable"
    "github.com/nyaosorg/go-readline-ny/simplehistory"
)

func main() {
    ctx := context.Background()
    fmt.Println("C-m or Enter      : Submit when lines end with `;`")
    fmt.Println("                    Otherwise insert a linefeed.")
    fmt.Println("C-j               : Submit always")
    fmt.Println("C-c               : Abort.")
    fmt.Println("C-D with no chars : Quit.")

    var ed multiline.Editor
    ed.SetPrompt(func(w io.Writer, lnum int) (int, error) {
        return fmt.Fprintf(w, "[%d] ", lnum 1)
    })

    ed.SubmitOnEnterWhen(func(lines []string, _ int) bool {
        return strings.HasSuffix(strings.TrimSpace(lines[len(lines)-1]), ";")
    })

    // To enable escape sequence on Windows.
    // (On other operating systems, it can be ommited)
    ed.SetWriter(colorable.NewColorableStdout())

    history := simplehistory.New()
    ed.SetHistory(history)
    ed.SetHistoryCycling(true)

    for {
        lines, err := ed.Read(ctx)
        if err != nil {
            fmt.Fprintln(os.Stderr, err.Error())
            return
        }
        L := strings.Join(lines, "\n")
        fmt.Println("-----")
        fmt.Println(L)
        fmt.Println("-----")
        history.Add(L)
    }
}