runelite-client: add anti drag plugin

runelite-mixins/src/main/java/net/runelite/mixins/RSClientMixin.java

@@ -123,6 +123,12 @@ public abstract class RSClientMixin implements RSClient
 	@Inject
 	private static RSNPC[] oldNpcs = new RSNPC[32768];
 
+	@Inject
+	private static int itemPressedDurationBuffer;
+
+	@Inject
+	private static int inventoryDragDelay;
+
 	@Inject
 	@Override
 	public boolean isInterpolatePlayerAnimations()
@@ -165,6 +171,13 @@ public abstract class RSClientMixin implements RSClient
 		interpolateObjectAnimations = interpolate;
 	}
 
+	@Inject
+	@Override
+	public void setInventoryDragDelay(int delay)
+	{
+		inventoryDragDelay = delay;
+	}
+
 	@Inject
 	@Override
 	public AccountType getAccountType()
@@ -633,6 +646,28 @@ public abstract class RSClientMixin implements RSClient
 		}
 	}
 
+	@FieldHook("itemPressedDuration")
+	@Inject
+	public static void itemPressedDurationChanged(int idx)
+	{
+		if (client.getItemPressedDuration() > 0)
+		{
+			itemPressedDurationBuffer++;
+			if (itemPressedDurationBuffer >= inventoryDragDelay)
+			{
+				client.setItemPressedDuration(itemPressedDurationBuffer);
+			}
+			else
+			{
+				client.setItemPressedDuration(0);
+			}
+		}
+		else
+		{
+			itemPressedDurationBuffer = 0;
+		}
+	}
+
 	@FieldHook("skillExperiences")
 	@Inject
 	public static void experiencedChanged(int idx)