Add item container changed event

runelite-api/src/main/java/net/runelite/api/ItemContainer.java

@@ -24,11 +24,11 @@
  */
 package net.runelite.api;
 
-public interface ItemContainer
+public interface ItemContainer extends Node
 {
 	/**
 	 * Get the items from the container
-	 * @return
+	 * @return items
 	 */
 	Item[] getItems();
 }

runelite-api/src/main/java/net/runelite/api/events/ItemContainerChanged.java

@@ -0,0 +1,34 @@
+/*
+ * Copyright (c) 2018, Adam <Adam@sigterm.info>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+package net.runelite.api.events;
+
+import lombok.Value;
+import net.runelite.api.ItemContainer;
+
+@Value
+public class ItemContainerChanged
+{
+	private final ItemContainer itemContainer;
+}

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

@@ -25,9 +25,12 @@
 package net.runelite.mixins;
 
 import net.runelite.api.Item;
+import net.runelite.api.events.ItemContainerChanged;
+import net.runelite.api.mixins.FieldHook;
 import net.runelite.api.mixins.Inject;
 import net.runelite.api.mixins.Mixin;
 import net.runelite.api.mixins.Shadow;
+import static net.runelite.client.callback.Hooks.deferredEventBus;
 import net.runelite.rs.api.RSClient;
 import net.runelite.rs.api.RSItem;
 import net.runelite.rs.api.RSItemContainer;
@@ -38,6 +41,9 @@ public abstract class RSItemContainerMixin implements RSItemContainer
 	@Shadow("clientInstance")
 	private static RSClient client;
 
+	@Inject
+	private int rl$lastCycle;
+
 	@Inject
 	@Override
 	public Item[] getItems()
@@ -57,4 +63,22 @@ public abstract class RSItemContainerMixin implements RSItemContainer
 		return items;
 	}
 
+	@FieldHook("stackSizes")
+	@Inject
+	public void stackSizesChanged(int idx)
+	{
+		int cycle = client.getGameCycle();
+		if (rl$lastCycle == cycle)
+		{
+			// Limit item container updates to one per cycle
+			return;
+		}
+
+		rl$lastCycle = cycle;
+
+		ItemContainerChanged event = new ItemContainerChanged();
+		event.setItemContainer(this);
+		deferredEventBus.post(event);
+	}
+
 }