introduce prompt.OptionCloseOnControlC()

option.go

@@ -250,6 +250,14 @@ func OptionShowCompletionAtStart() Option {
 	}
 }
 
+// OptionCloseOnControlC causes prompts to close on ControlC
+func OptionCloseOnControlC() Option {
+	return func(p *Prompt) error {
+		p.renderer.closeOnControlC = true
+		return nil
+	}
+}
+
 // OptionBreakLineCallback to run a callback at every break line
 func OptionBreakLineCallback(fn func(*Document)) Option {
 	return func(p *Prompt) error {

prompt.go

@@ -129,9 +129,14 @@ func (p *Prompt) feed(b []byte) (shouldExit bool, exec *Exec) {
 			p.history.Add(exec.input)
 		}
 	case ControlC:
-		p.renderer.BreakLine(p.buf)
-		p.buf = NewBuffer()
-		p.history.Clear()
+		if p.renderer.closeOnControlC && p.buf.Text() == "" {
+			shouldExit = true
+			return
+		} else {
+			p.renderer.BreakLine(p.buf)
+			p.buf = NewBuffer()
+			p.history.Clear()
+		}
 	case Up, ControlP:
 		if !completing { // Don't use p.completion.Completing() because it takes double operation when switch to selected=-1.
 			if newBuf, changed := p.history.Older(p.buf); changed {

render.go

@@ -13,6 +13,7 @@ type Render struct {
 	prefix             string
 	livePrefixCallback func() (prefix string, useLivePrefix bool)
 	breakLineCallback  func(*Document)
+	closeOnControlC    bool
 	title              string
 	row                uint16
 	col                uint16