From adac97f9a985bf878c1825e1d7b822fe72f862c0 Mon Sep 17 00:00:00 2001
From: lisongmin <lisongmin@protonmail.com>
Date: Sun, 9 May 2021 19:52:23 +0800
Subject: [PATCH] use last section name on previous pages if current page do
 not have a section name

---
 src/lib/outline.cc | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/lib/outline.cc b/src/lib/outline.cc
index 353938c4c..8c2eba74b 100644
--- a/src/lib/outline.cc
+++ b/src/lib/outline.cc
@@ -275,12 +275,16 @@ void Outline::addEmptyWebPage() {
 void OutlinePrivate::buildHFCache(OutlineItem * i, int level) {
 	buildPrefixSum();
 	if (level >= hfCache.size()) return;
+
+	OutlineItem * latest = 0;
 	foreach (OutlineItem * j, i->children) {
 		int page = j->page + prefixSum[j->document];
 		while (hfCache[level].size() < page)
-			hfCache[level].push_back(hfCache[level].back());
+			hfCache[level].push_back(latest ? latest : hfCache[level].back());
 		if (hfCache[level].size() == page)
 			hfCache[level].push_back(j);
+
+		latest = j;
 		buildHFCache(j, level+1);
 	}
 }