From 8624776d4572078ae6ff098d454c719047f9eb83 Mon Sep 17 00:00:00 2001
From: Mikael Fangel <34864484+MikaelFangel@users.noreply.github.com>
Date: Thu, 5 Dec 2024 22:40:33 +0100
Subject: [PATCH] fix(textinput): slicing outside cap (#532)

* textinput: fix slicing outside cap

* textinput: add test that makes slicing outside cap occur

* chore: tidy with gofmt

---------

Co-authored-by: bashbunni <bunni@bashbunni.dev>
---
 textinput/textinput.go      | 4 +++-
 textinput/textinput_test.go | 7 +++++++
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/textinput/textinput.go b/textinput/textinput.go
index d1abf1247..66e451859 100644
--- a/textinput/textinput.go
+++ b/textinput/textinput.go
@@ -700,10 +700,12 @@ func (m Model) View() string {
 func (m Model) placeholderView() string {
 	var (
 		v     string
-		p     = []rune(m.Placeholder)
 		style = m.PlaceholderStyle.Inline(true).Render
 	)
 
+	p := make([]rune, m.Width+1)
+	copy(p, []rune(m.Placeholder))
+
 	m.Cursor.TextStyle = m.PlaceholderStyle
 	m.Cursor.SetChar(string(p[:1]))
 	v += m.Cursor.View()
diff --git a/textinput/textinput_test.go b/textinput/textinput_test.go
index 27a7640a8..95ef0c616 100644
--- a/textinput/textinput_test.go
+++ b/textinput/textinput_test.go
@@ -30,3 +30,10 @@ func Test_CurrentSuggestion(t *testing.T) {
 		t.Fatalf("Error: expected first suggestion but was %s", suggestion)
 	}
 }
+
+func Test_SlicingOutsideCap(t *testing.T) {
+	textinput := New()
+	textinput.Placeholder = "作業ディレクトリを指定してください"
+	textinput.Width = 32
+	textinput.View()
+}