From edeacd809cbbce3c5c82932edb0914db4de9d05b Mon Sep 17 00:00:00 2001
From: Space Walker <spacedoesrs@gmail.com>
Date: Sat, 23 Dec 2023 14:56:54 +0100
Subject: [PATCH] fix scroll capping

---
 .../gui/widget/entries/EntryListWidget.java   | 18 ++++++++++++++-
 .../modmenu/mixin/MixinListWidget.java        | 23 +++++++++++++++++++
 .../modmenu/util/ListWidgetHelper.java        |  7 ++++++
 3 files changed, 47 insertions(+), 1 deletion(-)
 create mode 100644 src/main/java/com/terraformersmc/modmenu/mixin/MixinListWidget.java
 create mode 100644 src/main/java/com/terraformersmc/modmenu/util/ListWidgetHelper.java

diff --git a/src/main/java/com/terraformersmc/modmenu/gui/widget/entries/EntryListWidget.java b/src/main/java/com/terraformersmc/modmenu/gui/widget/entries/EntryListWidget.java
index 6eede5d5..ee53b2c7 100644
--- a/src/main/java/com/terraformersmc/modmenu/gui/widget/entries/EntryListWidget.java
+++ b/src/main/java/com/terraformersmc/modmenu/gui/widget/entries/EntryListWidget.java
@@ -4,13 +4,15 @@
 import org.lwjgl.opengl.GL11;
 
 import com.mojang.blaze3d.vertex.BufferBuilder;
+
 import com.terraformersmc.modmenu.util.GlUtil;
+import com.terraformersmc.modmenu.util.ListWidgetHelper;
 import com.terraformersmc.modmenu.util.MathUtil;
 
 import net.minecraft.client.Minecraft;
 import net.minecraft.client.gui.widget.ListWidget;
 
-public abstract class EntryListWidget extends ListWidget {
+public abstract class EntryListWidget extends ListWidget implements ListWidgetHelper {
 
 	protected double scrollAmount;
 	private boolean scrolling;
@@ -295,6 +297,20 @@ public void setScrollAmount(double amount) {
 		this.scrollAmount = amount;
 	}
 
+	@Override
+	public void doCapScrolling() {
+		int max = this.getHeight() - (this.maxY - this.minY - 4);
+		if (max < 0) {
+			max /= 2;
+		}
+		if (this.scrollAmount < 0.0F) {
+			this.scrollAmount = 0.0F;
+		}
+		if (this.scrollAmount > max) {
+			this.scrollAmount = max;
+		}
+	}
+
 	protected int getMaxScroll() {
 		return Math.max(0, this.getHeight() - (this.maxY - this.minY - 4));
 	}
diff --git a/src/main/java/com/terraformersmc/modmenu/mixin/MixinListWidget.java b/src/main/java/com/terraformersmc/modmenu/mixin/MixinListWidget.java
new file mode 100644
index 00000000..c0a417ba
--- /dev/null
+++ b/src/main/java/com/terraformersmc/modmenu/mixin/MixinListWidget.java
@@ -0,0 +1,23 @@
+package com.terraformersmc.modmenu.mixin;
+
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
+
+import com.terraformersmc.modmenu.util.ListWidgetHelper;
+
+import net.minecraft.client.gui.widget.ListWidget;
+
+@Mixin(ListWidget.class)
+public class MixinListWidget implements ListWidgetHelper {
+
+	@Inject(method = "capScrolling", at = @At("HEAD"))
+	private void modmenu$capScrolling(CallbackInfo ci) {
+		this.doCapScrolling();
+	}
+
+	@Override
+	public void doCapScrolling() {
+	}
+}
diff --git a/src/main/java/com/terraformersmc/modmenu/util/ListWidgetHelper.java b/src/main/java/com/terraformersmc/modmenu/util/ListWidgetHelper.java
new file mode 100644
index 00000000..f3790630
--- /dev/null
+++ b/src/main/java/com/terraformersmc/modmenu/util/ListWidgetHelper.java
@@ -0,0 +1,7 @@
+package com.terraformersmc.modmenu.util;
+
+public interface ListWidgetHelper {
+
+	void doCapScrolling();
+
+}