From d40721ef34128005663d5da2961f61966d4ac872 Mon Sep 17 00:00:00 2001
From: Maxim Slipenko <no-reply@maxim.slipenko.com>
Date: Wed, 9 Nov 2022 11:39:49 +0000
Subject: [PATCH] =?UTF-8?q?=D0=B4=D0=BE=D0=B1=D0=B0=D0=B2=D0=BB=D1=8F?=
 =?UTF-8?q?=D0=B5=D1=82=20IsChanged()=20=D0=B8=20ResetWithoutValue()?=
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---
 textarea/textarea.go | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/textarea/textarea.go b/textarea/textarea.go
index d552719..5c0cd6b 100644
--- a/textarea/textarea.go
+++ b/textarea/textarea.go
@@ -212,6 +212,8 @@ type Model struct {
 	// viewport is the vertically-scrollable viewport of the multi-line text
 	// input.
 	viewport *viewport.Model
+
+	isChanged bool
 }
 
 // New creates a new model with default settings.
@@ -281,6 +283,12 @@ func (m *Model) SetValue(s string) {
 	m.InsertString(s)
 }
 
+func (m *Model) SetValueAndReset(s string) {
+	m.Reset()
+	m.InsertString(s)
+	m.ResetWithoutValue()
+}
+
 // InsertString inserts a string at the cursor position.
 func (m *Model) InsertString(s string) {
 	lines := strings.Split(s, "\n")
@@ -320,6 +328,10 @@ func (m Model) Value() string {
 	return strings.TrimSuffix(v.String(), "\n")
 }
 
+func (m Model) IsChanged() bool {
+	return m.isChanged
+}
+
 // Length returns the number of characters currently in the text input.
 func (m *Model) Length() int {
 	var l int
@@ -450,10 +462,15 @@ func (m *Model) Blur() {
 // Reset sets the input to its default state with no input.
 func (m *Model) Reset() {
 	m.value = make([][]rune, minHeight, maxHeight)
+	m.ResetWithoutValue()
+}
+
+func (m *Model) ResetWithoutValue() {
 	m.col = 0
 	m.row = 0
 	m.viewport.GotoTop()
 	m.SetCursor(0)
+	m.isChanged = false
 }
 
 // handle a clipboard paste event, if supported.
@@ -940,6 +957,8 @@ func (m Model) Update(msg tea.Msg) (Model, tea.Cmd) {
 				break
 			}
 
+			m.isChanged = true
+
 			m.col = min(m.col, len(m.value[m.row]))
 			m.value[m.row] = append(m.value[m.row][:m.col], append(msg.Runes, m.value[m.row][m.col:]...)...)
 			m.SetCursor(m.col + len(msg.Runes))