From 9522b4873da0b7872cf033c0762a58a73c1ba517 Mon Sep 17 00:00:00 2001
From: Svjatoslav Agejenko <svjatoslav@svjatoslav.eu>
Date: Tue, 1 Sep 2020 20:07:29 +0300
Subject: [PATCH] Properly handle special case, when list depth decreases and
 depth is misaligned

---
 .../svjatoslav/sixth/core/document/Heading.java | 17 +++++++++++++++--
 .../sixth/core/document/text/FormattedText.java |  4 ++++
 2 files changed, 19 insertions(+), 2 deletions(-)

diff --git a/src/main/java/eu/svjatoslav/sixth/core/document/Heading.java b/src/main/java/eu/svjatoslav/sixth/core/document/Heading.java
index db9f9df..f4a9513 100644
--- a/src/main/java/eu/svjatoslav/sixth/core/document/Heading.java
+++ b/src/main/java/eu/svjatoslav/sixth/core/document/Heading.java
@@ -73,6 +73,7 @@ public class Heading {
         FormattedText title = FormattedText.fromOrg(parseFullListTitle(getPartialTitle(listSections), tm.getTokenizer(), indent));
 
         if (indent > currentListElement.indent){
+            // list dept increases
             ListElement newElement = new ListElement(title, indent, currentListElement, type);
             currentListElement.addContent(newElement);
             currentListElement = newElement;
@@ -80,16 +81,28 @@ public class Heading {
         }
 
         if (indent == currentListElement.indent){
+            // list depth is the same
             ListElement newElement = new ListElement(title, indent, currentListElement.parent, type);
             currentListElement.parent.addContent(newElement);
             currentListElement = newElement;
             return;
         }
 
+        // list dept decreases
         while (true){
             if (currentListElement.parent.indent <= indent){
-                ListElement newElement = new ListElement(title, indent, currentListElement.parent, type);
-                currentListElement.parent.addContent(newElement);
+                if (currentListElement.parent.indent < 0){
+                    // reached first depth level, cannot go any deeper.
+                    // This special situation arisesbb only when lint indents are not properly aligned.
+                    // That is, document structure is incorrect.
+                    ListElement newElement = new ListElement(title, indent, currentListElement.parent, type);
+                    currentListElement.parent.addContent(newElement);
+                    currentListElement = newElement;
+                    return;
+                }
+
+                ListElement newElement = new ListElement(title, indent, currentListElement.parent.parent, type);
+                currentListElement.parent.parent.addContent(newElement);
                 currentListElement = newElement;
                 return;
             }
diff --git a/src/main/java/eu/svjatoslav/sixth/core/document/text/FormattedText.java b/src/main/java/eu/svjatoslav/sixth/core/document/text/FormattedText.java
index ad7d8ca..44af05c 100644
--- a/src/main/java/eu/svjatoslav/sixth/core/document/text/FormattedText.java
+++ b/src/main/java/eu/svjatoslav/sixth/core/document/text/FormattedText.java
@@ -67,4 +67,8 @@ public class FormattedText {
         return tokenizer;
     }
 
+
+    public String toString(){
+        return toMD(0);
+    }
 }
-- 
2.20.1