Let prompts receive pasted text in one piece

Like a menu's filter, a prompt takes a single line of text, so treat
pasted text the same way. Before, the prompt ignored pasted newlines.
This joined the lines without a space. It also ran the keybindings for
other keys in the text, so a pasted Esc closed the prompt, and a pasted
tab switched to the suggestions.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

pkg/gui/controllers/helpers/confirmation_helper.go

@@ -53,14 +53,6 @@ func (self *ConfirmationHelper) wrappedPromptConfirmationFunction(
 	preserveWhitespace bool,
 ) func() error {
 	return func() error {
-		if self.c.GocuiGui().IsPasting {
-			// The user is pasting multi-line text into a prompt; we don't want to handle the
-			// line feeds as "confirm" keybindings. Simply ignoring them is the best we can do; this
-			// will cause the entire pasted text to appear as a single line in the prompt. Hopefully
-			// the user knows that ctrl-u allows them to delete it again...
-			return nil
-		}
-
 		response := getResponse()
 		if !preserveWhitespace {
 			response = strings.TrimSpace(response)

pkg/gui/editors.go

@@ -40,6 +40,13 @@ func (gui *Gui) promptEditor(v *gocui.View, key gocui.Key) bool {
 	return matched
 }
 
+func (gui *Gui) pasteIntoPrompt(text string) {
+	v := gui.Views.Prompt
+	if typePastedTextIntoSingleLineView(v, text) {
+		gui.onPromptContentChanged(v)
+	}
+}
+
 func (gui *Gui) onPromptContentChanged(v *gocui.View) {
 	suggestionsContext := gui.State.Contexts.Suggestions
 	// Capture the suggestions function and the input here, on the UI thread; the

pkg/gui/views.go

@@ -140,6 +140,10 @@ func (gui *Gui) createAllViews() error {
 	gui.Views.Prompt.Wrap = false // We don't want wrapping in one-line prompts
 	gui.Views.Prompt.Editable = true
 	gui.Views.Prompt.Editor = gocui.EditorFunc(gui.promptEditor)
+	gui.Views.Prompt.OnPaste = func(text string) error {
+		gui.pasteIntoPrompt(text)
+		return nil
+	}
 
 	gui.Views.Suggestions.Visible = false
 

pkg/integration/components/prompt_driver.go

@@ -31,6 +31,13 @@ func (self *PromptDriver) Type(value string) *PromptDriver {
 	return self
 }
 
+// pastes the text the way a terminal does it
+func (self *PromptDriver) Paste(text string) *PromptDriver {
+	self.t.paste(text)
+
+	return self
+}
+
 func (self *PromptDriver) Clear() *PromptDriver {
 	self.t.press(ClearKey)
 

pkg/integration/tests/misc/paste_into_prompt.go

@@ -0,0 +1,29 @@
+package misc
+
+import (
+	"github.com/jesseduffield/lazygit/pkg/config"
+	. "github.com/jesseduffield/lazygit/pkg/integration/components"
+)
+
+var PasteIntoPrompt = NewIntegrationTest(NewIntegrationTestArgs{
+	Description:  "Paste multi-line text into a prompt",
+	ExtraCmdArgs: []string{},
+	Skip:         false,
+	SetupConfig:  func(config *config.AppConfig) {},
+	SetupRepo: func(shell *Shell) {
+		shell.EmptyCommit("initial commit")
+	},
+	Run: func(t *TestDriver, keys config.KeybindingConfig) {
+		t.Views().Branches().
+			Focus().
+			Press(keys.Universal.New)
+
+		t.ExpectPopup().Prompt().
+			Title(Contains("New branch name")).
+			Paste("\nmy\tnew\nbranch\n")
+
+		t.Views().Prompt().
+			IsFocused().
+			Content(Equals("my new branch"))
+	},
+})

pkg/integration/tests/test_list.go

@@ -580,6 +580,7 @@ var tests = []*components.IntegrationTest{
 	misc.DirenvUnloadsOnBlockedEnvrc,
 	misc.FilterRecentRepos,
 	misc.InitialOpen,
+	misc.PasteIntoPrompt,
 	misc.RecentReposBranchColumn,
 	misc.RecentReposColumnWidths,
 	misc.RecentReposOnLaunch,