Support bracketed paste events

gui.go

@@ -157,6 +157,8 @@ type Gui struct {
 	// If Mouse is true then mouse events will be enabled.
 	Mouse bool
 
+	IsPasting bool
+
 	// If InputEsc is true, when ESC sequence is in the buffer and it doesn't
 	// match any known sequence, ESC means KeyEsc.
 	InputEsc bool
@@ -759,6 +761,7 @@ func (g *Gui) MainLoop() error {
 	}()
 
 	Screen.EnableFocus()
+	Screen.EnablePaste()
 
 	previousEnableMouse := false
 	for {
@@ -847,6 +850,9 @@ func (g *Gui) handleEvent(ev *GocuiEvent) error {
 		return nil
 	case eventFocus:
 		return g.onFocus(ev)
+	case eventPaste:
+		g.IsPasting = ev.Start
+		return nil
 	default:
 		return nil
 	}
@@ -1305,6 +1311,20 @@ func (g *Gui) onKey(ev *GocuiEvent) error {
 	switch ev.Type {
 	case eventKey:
 
+		// When pasting text in Ghostty, it sends us '\r' instead of '\n' for
+		// newlines. I actually don't quite understand why, because from reading
+		// Ghostty's source code (e.g.
+		// https://github.com/ghostty-org/ghostty/commit/010338354a0) it does
+		// this conversion only for non-bracketed paste mode, but I'm seeing it
+		// in bracketed paste mode. Whatever I'm missing here, converting '\r'
+		// back to '\n' fixes pasting multi-line text from Ghostty, and doesn't
+		// seem harmful for other terminal emulators.
+		//
+		// KeyCtrlJ (int value 10) is '\r', and KeyCtrlM (int value 13) is '\n'.
+		if g.IsPasting && ev.Key == KeyCtrlJ {
+			ev.Key = KeyCtrlM
+		}
+
 		err := g.execKeybindings(g.currentView, ev)
 		if err != nil {
 			return err
@@ -1469,6 +1489,10 @@ func (g *Gui) execKeybindings(v *View, ev *GocuiEvent) error {
 	var globalKb *keybinding
 	var matchingParentViewKb *keybinding
 
+	if g.IsPasting && v != nil && !v.Editable {
+		return nil
+	}
+
 	// if we're searching, and we've hit n/N/Esc, we ignore the default keybinding
 	if v != nil && v.IsSearching() && ev.Mod == ModNone {
 		if eventMatchesKey(ev, g.NextSearchMatchKey) {

tcell_driver.go

@@ -155,6 +155,8 @@ type gocuiEventType uint8
 //	The 'MouseX' and 'MouseY' fields are valid if 'Type' is 'eventMouse'.
 //	The 'Width' and 'Height' fields are valid if 'Type' is 'eventResize'.
 //	The 'Focused' field is valid if 'Type' is 'eventFocus'.
+//	The 'Start' field is valid if 'Type' is 'eventPaste'. It is true for the
+//	  beginning of a paste operation, false for the end.
 //	The 'Err' field is valid if 'Type' is 'eventError'.
 type GocuiEvent struct {
 	Type    gocuiEventType
@@ -167,6 +169,7 @@ type GocuiEvent struct {
 	MouseX  int
 	MouseY  int
 	Focused bool
+	Start   bool
 	N       int
 }
 
@@ -178,6 +181,7 @@ const (
 	eventMouse
 	eventMouseMove // only used when no button is down, otherwise it's eventMouse
 	eventFocus
+	eventPaste
 	eventInterrupt
 	eventError
 	eventRaw
@@ -417,6 +421,11 @@ func (g *Gui) pollEvent() GocuiEvent {
 			Type:    eventFocus,
 			Focused: tev.Focused,
 		}
+	case *tcell.EventPaste:
+		return GocuiEvent{
+			Type:  eventPaste,
+			Start: tev.Start(),
+		}
 	default:
 		return GocuiEvent{Type: eventNone}
 	}