From 04da32e0e74bc2c3749ca82853a475b4e99b11ca Mon Sep 17 00:00:00 2001
From: MarcinZiabek <marcin@ziabek.com>
Date: Tue, 16 Aug 2022 16:32:53 +0200
Subject: [PATCH] Stability improvements for text wrapping

---
 QuestPDF/Drawing/TextShaper.cs                | 3 +++
 QuestPDF/Elements/Text/Items/TextBlockSpan.cs | 2 +-
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/QuestPDF/Drawing/TextShaper.cs b/QuestPDF/Drawing/TextShaper.cs
index 85b4f5e..d04612e 100644
--- a/QuestPDF/Drawing/TextShaper.cs
+++ b/QuestPDF/Drawing/TextShaper.cs
@@ -129,6 +129,9 @@ namespace QuestPDF.Drawing
         {
             if (Glyphs.Length == 0)
                 return null;
+
+            if (startIndex > endIndex)
+                return null;
             
             using var skTextBlobBuilder = new SKTextBlobBuilder();
             
diff --git a/QuestPDF/Elements/Text/Items/TextBlockSpan.cs b/QuestPDF/Elements/Text/Items/TextBlockSpan.cs
index ee65d73..033931e 100644
--- a/QuestPDF/Elements/Text/Items/TextBlockSpan.cs
+++ b/QuestPDF/Elements/Text/Items/TextBlockSpan.cs
@@ -66,7 +66,7 @@ namespace QuestPDF.Elements.Text.Items
             // start breaking text from requested position
             var endIndex = TextShapingResult.BreakText(startIndex, request.AvailableWidth);
 
-            if (endIndex < 0)
+            if (endIndex < startIndex)
                 return null;
   
             // break text only on spaces