From d8b5fc5dd9542e011974803ae5bdc0190baed774 Mon Sep 17 00:00:00 2001
From: Zufu Liu <unknown>
Date: Sat, 23 Mar 2024 09:08:06 +1100
Subject: Feature [feature-requests:#1512]. Simplify ScaledVector::PushBack.
 Prefer UndoActions::Length to UndoActions::lengths.ValueAt.

---
 src/UndoHistory.cxx | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/src/UndoHistory.cxx b/src/UndoHistory.cxx
index 929c8743e..c4b241103 100644
--- a/src/UndoHistory.cxx
+++ b/src/UndoHistory.cxx
@@ -120,7 +120,7 @@ void ScaledVector::ReSize(size_t length) {
 }
 
 void ScaledVector::PushBack() {
-	ReSize(Size() + 1);
+	bytes.resize(bytes.size() + element.size);
 }
 
 size_t ScaledVector::SizeInBytes() const noexcept {
@@ -496,9 +496,9 @@ std::string_view UndoHistory::Text(int action) noexcept {
 		position = memory->position;
 	}
 	for (; act < action; act++) {
-		position += actions.lengths.ValueAt(act);
+		position += actions.Length(act);
 	}
-	const size_t length = actions.lengths.ValueAt(action);
+	const size_t length = actions.Length(action);
 	const char *scrap = scraps->TextAt(position);
 	memory = {action, position};
 	return {scrap, length};
@@ -581,7 +581,7 @@ Action UndoHistory::GetUndoStep() const noexcept {
 }
 
 void UndoHistory::CompletedUndoStep() noexcept {
-	scraps->MoveBack(actions.lengths.ValueAt(PreviousAction()));
+	scraps->MoveBack(actions.Length(PreviousAction()));
 	currentAction--;
 }
 
@@ -624,7 +624,7 @@ Action UndoHistory::GetRedoStep() const noexcept {
 }
 
 void UndoHistory::CompletedRedoStep() noexcept {
-	scraps->MoveForward(actions.lengths.ValueAt(currentAction));
+	scraps->MoveForward(actions.Length(currentAction));
 	currentAction++;
 }
 
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