From d029f8e09a62330162484440b102b9cd372ab772 Mon Sep 17 00:00:00 2001
From: extio-de <github@extio.de>
Date: Sat, 16 May 2026 17:10:57 +0200
Subject: [PATCH] fix(CustomMultiLineTextArea): recalculate scroll offset on
 text change and scale factor update

---
 pom.xml                                                |  2 +-
 .../control/components/CustomMultiLineTextArea.java    | 10 ++++++++++
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/pom.xml b/pom.xml
index e0f2d62..172a824 100644
--- a/pom.xml
+++ b/pom.xml
@@ -4,7 +4,7 @@
     <modelVersion>4.0.0</modelVersion>
     <groupId>de.extio</groupId>
     <artifactId>game-engine</artifactId>
-    <version>1.0.16</version>
+    <version>1.0.17</version>
 
     <properties>
         <java.version>25</java.version>
diff --git a/src/main/java/de/extio/game_engine/renderer/g2d/control/components/CustomMultiLineTextArea.java b/src/main/java/de/extio/game_engine/renderer/g2d/control/components/CustomMultiLineTextArea.java
index eb9e518..5cc4016 100644
--- a/src/main/java/de/extio/game_engine/renderer/g2d/control/components/CustomMultiLineTextArea.java
+++ b/src/main/java/de/extio/game_engine/renderer/g2d/control/components/CustomMultiLineTextArea.java
@@ -101,6 +101,7 @@ public class CustomMultiLineTextArea extends Component {
 		this.caretPosition = Math.min(this.caretPosition, this.text.length());
 		this.selectionAnchor = this.caretPosition;
 		this.cachedWrappedLines = null;
+		this.recalculateScrollOffset();
 		this.dirty = true;
 	}
 	
@@ -123,6 +124,7 @@ public class CustomMultiLineTextArea extends Component {
 	public void setScaleFactor(final double scaleFactor) {
 		this.scaleFactor = scaleFactor;
 		this.cachedWrappedLines = null;
+		this.recalculateScrollOffset();
 		this.dirty = true;
 	}
 	
@@ -446,10 +448,18 @@ public class CustomMultiLineTextArea extends Component {
 	}
 	
 	private void notifyTextChanged() {
+		this.recalculateScrollOffset();
 		if (this.onTextChanged != null) {
 			this.onTextChanged.accept(this.text);
 		}
 	}
+
+	private void recalculateScrollOffset() {
+		final var lineHeight = this.getLineHeight();
+		final var totalContentHeight = this.getWrappedLines().size() * lineHeight;
+		final var maxScroll = Math.max(0, totalContentHeight - this.getVisibleHeight());
+		this.scrollOffsetY = Math.max(0, Math.min(maxScroll, this.scrollOffsetY));
+	}
 	
 	private void moveCaretUp() {
 		final List<String> wrappedLines = getWrappedLines();