api: add overhead text changed event and setOverheadText

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

@@ -239,4 +239,11 @@ public interface Actor extends Renderable
 	 * @return the overhead text
 	 */
 	String getOverheadText();
+
+	/**
+	 * Sets the overhead text that is displayed above the actor
+	 *
+	 * @param overheadText the overhead text
+	 */
+	void setOverheadText(String overheadText);
 }

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

@@ -0,0 +1,39 @@
+/*
+ * Copyright (c) 2018, Magic fTail
+ * 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.Actor;
+
+/**
+ * Event fired when an actors overhead text is changed.
+ */
+@Value
+public class OverheadTextChanged
+{
+	private final Actor actor;
+
+	private final String overheadText;
+}

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

@@ -43,6 +43,7 @@ import net.runelite.api.events.GraphicChanged;
 import net.runelite.api.events.HitsplatApplied;
 import net.runelite.api.events.InteractingChanged;
 import net.runelite.api.events.LocalPlayerDeath;
+import net.runelite.api.events.OverheadTextChanged;
 import net.runelite.api.mixins.FieldHook;
 import net.runelite.api.mixins.Inject;
 import net.runelite.api.mixins.MethodHook;
@@ -208,6 +209,18 @@ public abstract class RSActorMixin implements RSActor
 		client.getCallbacks().post(interactingChanged);
 	}
 
+	@FieldHook("overhead")
+	@Inject
+	public void overheadTextChanged(int idx)
+	{
+		String overheadText = getOverheadText();
+		if (overheadText != null)
+		{
+			OverheadTextChanged overheadTextChanged = new OverheadTextChanged(this, overheadText);
+			client.getCallbacks().post(overheadTextChanged);
+		}
+	}
+
 	@Inject
 	@Override
 	public Polygon getConvexHull()

runescape-api/src/main/java/net/runelite/rs/api/RSActor.java

@@ -36,6 +36,10 @@ public interface RSActor extends RSRenderable, Actor
 	@Override
 	String getOverheadText();
 
+	@Import("overhead")
+	@Override
+	void setOverheadText(String overheadText);
+
 	@Import("x")
 	int getX();