From abf68a2399d8895c26dd6ca7a82c54dd516fa0ba Mon Sep 17 00:00:00 2001
From: Susko3 <Susko3@protonmail.com>
Date: Mon, 18 Jul 2022 12:02:35 +0200
Subject: [PATCH] Fix zero width textbox throwing

Math.Clamp could fail if the usable text area was considered negative.
---
 osu.Framework/Graphics/UserInterface/TextBox.cs | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/osu.Framework/Graphics/UserInterface/TextBox.cs b/osu.Framework/Graphics/UserInterface/TextBox.cs
index ad4142618a..6e2a9cfbe3 100644
--- a/osu.Framework/Graphics/UserInterface/TextBox.cs
+++ b/osu.Framework/Graphics/UserInterface/TextBox.cs
@@ -1570,8 +1570,17 @@ private void updateImeWindowPosition()
             float start = getPositionAt(startIndex) - textContainerPosX + LeftRightPadding;
             float end = getPositionAt(endIndex) - textContainerPosX + LeftRightPadding;
 
-            start = Math.Clamp(start, LeftRightPadding, DrawWidth - LeftRightPadding);
-            end = Math.Clamp(end, LeftRightPadding, DrawWidth - LeftRightPadding);
+            if (LeftRightPadding <= DrawWidth - LeftRightPadding)
+            {
+                start = Math.Clamp(start, LeftRightPadding, DrawWidth - LeftRightPadding);
+                end = Math.Clamp(end, LeftRightPadding, DrawWidth - LeftRightPadding);
+            }
+            else
+            {
+                // DrawWidth is probably zero/invalid, sane fallback instead of throwing in Math.Clamp
+                start = 0;
+                end = 0;
+            }
 
             var compositionTextRectangle = new RectangleF
             {