kickoff ioloop only needs, solved #1

operation.go

@@ -10,12 +10,14 @@ type Operation struct {
 	t       *Terminal
 	buf     *RuneBuffer
 	outchan chan []rune
+
 	*opHistory
 	*opSearch
 }
 
 type wrapWriter struct {
 	r      *Operation
+	t      *Terminal
 	target io.Writer
 }
 
@@ -23,7 +25,9 @@ func (w *wrapWriter) Write(b []byte) (int, error) {
 	buf := w.r.buf
 	buf.Clean()
 	n, err := w.target.Write(b)
-	w.r.buf.Refresh()
+	if w.t.IsReading() {
+		w.r.buf.Refresh()
+	}
 	if w.r.IsSearchMode() {
 		w.r.SearchRefresh(-1)
 	}
@@ -135,7 +139,11 @@ func (o *Operation) ioloop() {
 }
 
 func (o *Operation) Stderr() io.Writer {
-	return &wrapWriter{target: os.Stderr, r: o}
+	return &wrapWriter{target: os.Stderr, r: o, t: o.t}
+}
+
+func (o *Operation) Stdout() io.Writer {
+	return &wrapWriter{target: os.Stdout, r: o, t: o.t}
 }
 
 func (o *Operation) String() (string, error) {
@@ -148,6 +156,7 @@ func (o *Operation) String() (string, error) {
 
 func (o *Operation) Runes() ([]rune, error) {
 	o.buf.Refresh() // print prompt
+	o.t.KickRead()
 	r := <-o.outchan
 	if r == nil {
 		return nil, io.EOF

readline.go

@@ -28,6 +28,10 @@ func New(prompt string) (*Instance, error) {
 	return NewEx(&Config{Prompt: prompt})
 }
 
+func (i *Instance) Stdout() io.Writer {
+	return i.o.Stdout()
+}
+
 func (i *Instance) Stderr() io.Writer {
 	return i.o.Stderr()
 }

terminal.go

@@ -4,6 +4,7 @@ import (
 	"bufio"
 	"fmt"
 	"os"
+	"sync"
 	"sync/atomic"
 	"syscall"
 
@@ -11,10 +12,14 @@ import (
 )
 
 type Terminal struct {
-	cfg     *Config
-	state   *terminal.State
-	outchan chan rune
-	closed  int64
+	cfg       *Config
+	state     *terminal.State
+	outchan   chan rune
+	closed    int64
+	stopChan  chan struct{}
+	kickChan  chan struct{}
+	wg        sync.WaitGroup
+	isReading bool
 }
 
 func NewTerminal(cfg *Config) (*Terminal, error) {
@@ -23,9 +28,11 @@ func NewTerminal(cfg *Config) (*Terminal, error) {
 		return nil, err
 	}
 	t := &Terminal{
-		cfg:     cfg,
-		state:   state,
-		outchan: make(chan rune),
+		cfg:      cfg,
+		state:    state,
+		kickChan: make(chan struct{}, 1),
+		outchan:  make(chan rune),
+		stopChan: make(chan struct{}, 1),
 	}
 
 	go t.ioloop()
@@ -52,11 +59,38 @@ func (t *Terminal) ReadRune() rune {
 	return <-t.outchan
 }
 
+func (t *Terminal) IsReading() bool {
+	return t.isReading
+}
+
+func (t *Terminal) KickRead() {
+	select {
+	case t.kickChan <- struct{}{}:
+	default:
+	}
+}
+
 func (t *Terminal) ioloop() {
+	t.wg.Add(1)
+	defer t.wg.Done()
+	var (
+		isEscape       bool
+		isEscapeEx     bool
+		expectNextChar bool
+	)
+
 	buf := bufio.NewReader(os.Stdin)
-	isEscape := false
-	isEscapeEx := false
 	for {
+		if !expectNextChar {
+			t.isReading = false
+			select {
+			case <-t.kickChan:
+				t.isReading = true
+			case <-t.stopChan:
+				return
+			}
+		}
+		expectNextChar = false
 		r, _, err := buf.ReadRune()
 		if err != nil {
 			break
@@ -65,6 +99,7 @@ func (t *Terminal) ioloop() {
 		if isEscape {
 			isEscape = false
 			if r == CharEscapeEx {
+				expectNextChar = true
 				isEscapeEx = true
 				continue
 			}
@@ -80,7 +115,11 @@ func (t *Terminal) ioloop() {
 			goto exit
 		case CharEsc:
 			isEscape = true
+			expectNextChar = true
+		case CharEnter, CharCtrlJ:
+			t.outchan <- r
 		default:
+			expectNextChar = true
 			t.outchan <- r
 		}
 	}
@@ -91,5 +130,7 @@ func (t *Terminal) Close() error {
 	if atomic.SwapInt64(&t.closed, 1) != 0 {
 		return nil
 	}
+	t.stopChan <- struct{}{}
+	t.wg.Wait()
 	return Restore(syscall.Stdin, t.state)
 }

utils.go

@@ -22,7 +22,13 @@ func MakeRaw(fd int) (*terminal.State, error) {
 }
 
 func Restore(fd int, state *terminal.State) error {
-	return terminal.Restore(fd, state)
+	err := terminal.Restore(fd, state)
+	if err != nil {
+		if err.Error() == "errno 0" {
+			err = nil
+		}
+	}
+	return nil
 }
 
 func IsPrintable(key rune) bool {