Add support for ctrl-space key

Close #825

src/options.go

@@ -393,6 +393,8 @@ func parseKeyChords(str string, message string) map[int]string {
 			chord = tui.AltZ + int(' ')
 		case "bspace", "bs":
 			chord = tui.BSpace
+		case "ctrl-space":
+			chord = tui.CtrlSpace
 		case "alt-enter", "alt-return":
 			chord = tui.AltEnter
 		case "alt-space":

src/tui/light.go

@@ -322,6 +322,8 @@ func (r *LightRenderer) GetChar() Event {
 		return Event{CtrlQ, 0, nil}
 	case 127:
 		return Event{BSpace, 0, nil}
+	case 0:
+		return Event{CtrlSpace, 0, nil}
 	case ESC:
 		ev := r.escSequence(&sz)
 		// Second chance

src/tui/ncurses.go

@@ -475,6 +475,8 @@ func (r *FullscreenRenderer) GetChar() Event {
 		return escSequence()
 	case 127:
 		return Event{BSpace, 0, nil}
+	case 0:
+		return Event{CtrlSpace, 0, nil}
 	}
 	// CTRL-A ~ CTRL-Z
 	if c >= CtrlA && c <= CtrlZ {

src/tui/tcell.go

@@ -270,6 +270,8 @@ func (r *FullscreenRenderer) GetChar() Event {
 			return Event{CtrlY, 0, nil}
 		case tcell.KeyCtrlZ:
 			return Event{CtrlZ, 0, nil}
+		case tcell.KeyCtrlSpace:
+			return Event{CtrlSpace, 0, nil}
 		case tcell.KeyBackspace, tcell.KeyBackspace2:
 			if alt {
 				return Event{AltBS, 0, nil}

src/tui/tui.go

@@ -38,6 +38,7 @@ const (
 	CtrlY
 	CtrlZ
 	ESC
+	CtrlSpace
 
 	Invalid
 	Resize