From e8aa2f922b41864f45749950ab75a86a5d91dc6e Mon Sep 17 00:00:00 2001
From: Chandler Cox <mr.chandlercox@gmail.com>
Date: Fri, 14 Apr 2023 15:00:50 -0500
Subject: [PATCH] Allow word wrapping to wrap on capital letters and
 underscores.

---
 Source/Engine/Render2D/Font.cpp | 41 +++++++++++++++++++++++++++++++++
 1 file changed, 41 insertions(+)

diff --git a/Source/Engine/Render2D/Font.cpp b/Source/Engine/Render2D/Font.cpp
index 0cbc30701..d80f7d19c 100644
--- a/Source/Engine/Render2D/Font.cpp
+++ b/Source/Engine/Render2D/Font.cpp
@@ -122,6 +122,12 @@ void Font::ProcessText(const StringView& text, Array<FontLineCache>& outputLines
     float lastWhitespaceX = 0;
     bool lastMoveLine = false;
 
+    int32 lastUpperIndex = INVALID_INDEX;
+    float lastUpperX = 0;
+    
+    int32 lastUnderscoreIndex = INVALID_INDEX;
+    float lastUnderscoreX = 0;
+
     // Process each character to split text into single lines
     for (int32 currentIndex = 0; currentIndex < textLength;)
     {
@@ -141,6 +147,21 @@ void Font::ProcessText(const StringView& text, Array<FontLineCache>& outputLines
             lastWhitespaceX = cursorX;
         }
 
+        // Check if character is an upper case letter
+        const bool isUpper = StringUtils::IsUpper(currentChar);
+        if (isUpper && currentIndex != 0)
+        {
+            lastUpperIndex = currentIndex;
+            lastUpperX = cursorX;
+        }
+
+        const bool isUnderscore = currentChar == '_';
+        if (isUnderscore)
+        {
+            lastUnderscoreIndex = currentIndex;
+            lastUnderscoreX = cursorX;
+        }
+
         // Check if it's a newline character
         if (currentChar == '\n')
         {
@@ -185,6 +206,20 @@ void Font::ProcessText(const StringView& text, Array<FontLineCache>& outputLines
                     currentIndex = lastWhitespaceIndex + 1;
                     nextCharIndex = currentIndex;
                 }
+                else if (lastUpperIndex != INVALID_INDEX)
+                {
+                    cursorX = lastUpperX;
+                    tmpLine.LastCharIndex = lastUpperIndex - 1;
+                    currentIndex = lastUpperIndex;
+                    nextCharIndex = currentIndex;
+                }
+                else if (lastUnderscoreIndex != INVALID_INDEX)
+                {
+                    cursorX = lastUnderscoreX;
+                    tmpLine.LastCharIndex = lastUnderscoreIndex;
+                    currentIndex = lastUnderscoreIndex + 1;
+                    nextCharIndex = currentIndex;
+                }
                 else
                 {
                     nextCharIndex = currentIndex;
@@ -224,6 +259,12 @@ void Font::ProcessText(const StringView& text, Array<FontLineCache>& outputLines
             lastWhitespaceIndex = INVALID_INDEX;
             lastWhitespaceX = 0;
 
+            lastUpperIndex = INVALID_INDEX;
+            lastUpperX = 0;
+
+            lastUnderscoreIndex = INVALID_INDEX;
+            lastUnderscoreX = 0;
+
             previous.IsValid = false;
         }