From f39367fc4c7af72caef8e20b1e9b1a038e242b0a Mon Sep 17 00:00:00 2001
From: Neil <nyamatongwe@gmail.com>
Date: Fri, 16 Feb 2024 09:52:43 +1100
Subject: Implement detach point access with SCI_SETUNDODETACH and
 SCI_GETUNDODETACH. Write more documentation for undo history.

---
 src/UndoHistory.cxx | 12 ++++++++++++
 1 file changed, 12 insertions(+)

(limited to 'src/UndoHistory.cxx')

diff --git a/src/UndoHistory.cxx b/src/UndoHistory.cxx
index 62f871a60..810cd9a14 100644
--- a/src/UndoHistory.cxx
+++ b/src/UndoHistory.cxx
@@ -395,6 +395,18 @@ bool UndoHistory::AfterSavePoint() const noexcept {
 	return (savePoint >= 0) && (savePoint <= currentAction);
 }
 
+void UndoHistory::SetDetachPoint(int action) noexcept {
+	if (action == -1) {
+		detach = {};
+	} else {
+		detach = action;
+	}
+}
+
+int UndoHistory::DetachPoint() const noexcept {
+	return detach.value_or(-1);
+}
+
 bool UndoHistory::AfterDetachPoint() const noexcept {
 	return detach && (*detach < currentAction);
 }
-- 
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