From 34facd87699c3a65b0b8bfbe1590dc339997d6a4 Mon Sep 17 00:00:00 2001
From: Chandler Cox <mr.chandlercox@gmail.com>
Date: Thu, 5 Sep 2024 18:54:03 -0500
Subject: [PATCH] Add Shift+End for textboxbase

---
 Source/Engine/UI/GUI/Common/TextBoxBase.cs | 20 +++++++++++++++++++-
 1 file changed, 19 insertions(+), 1 deletion(-)

diff --git a/Source/Engine/UI/GUI/Common/TextBoxBase.cs b/Source/Engine/UI/GUI/Common/TextBoxBase.cs
index 95b49850b..c22899c7b 100644
--- a/Source/Engine/UI/GUI/Common/TextBoxBase.cs
+++ b/Source/Engine/UI/GUI/Common/TextBoxBase.cs
@@ -924,6 +924,19 @@ namespace FlaxEngine.GUI
             return newLineLoc;
         }
 
+        private int FindNextLineBegin()
+        {
+            int caretPos = CaretPosition;
+            if (caretPos + 2 > TextLength)
+                return TextLength;
+            int newLineLoc = _text.IndexOf('\n', caretPos + 2);
+            if (newLineLoc == -1)
+                newLineLoc = TextLength;
+            else
+                newLineLoc++;
+            return newLineLoc;
+        }
+
         private int FindLineDownChar(int index)
         {
             if (!IsMultiline)
@@ -1491,8 +1504,13 @@ namespace FlaxEngine.GUI
                 return true;
             case KeyboardKeys.End:
             {
+                // Select text from the current cursor point to the beginning of a new line
+                if (shiftDown && _selectionStart != -1)
+                    SetSelection(_selectionStart, FindNextLineBegin());
                 // Move caret after last character
-                SetSelection(TextLength);
+                else
+                    SetSelection(TextLength);
+                
                 return true;
             }
             case KeyboardKeys.Tab: