runelite-api: allow running scripts with a widget source

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

@@ -1337,11 +1337,21 @@ public interface Client extends GameEngine
 	 *
 	 * This method must be ran on the client thread and is not reentrant
 	 *
+	 * This method is shorthand for {@code client.createScriptEvent(args).run()}
+	 *
 	 * @param args the script id, then any additional arguments to execute the script with
 	 * @see ScriptID
 	 */
 	void runScript(Object... args);
 
+	/**
+	 * Creates a blank ScriptEvent for executing a ClientScript2 script
+	 *
+	 * @param args the script id, then any additional arguments to execute the script with
+	 * @see ScriptID
+	 */
+	ScriptEvent createScriptEvent(Object ...args);
+
 	/**
 	 * Checks whether or not there is any active hint arrow.
 	 *

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

@@ -40,13 +40,19 @@ public interface ScriptEvent
 	String NAME = "event_opbase";
 
 	/**
-	 * Gets the widget of the event.
+	 * Gets the widget the {@link #WIDGET_ID} and {@link #WIDGET_INDEX} args
-	 *
+	 * are substituted with
-	 * @return the widget
-	 * @see net.runelite.api.widgets.Widget
 	 */
 	Widget getSource();
 
+	/**
+	 * Sets the widget the {@link #WIDGET_ID} and {@link #WIDGET_INDEX} args
+	 * are substituted with. This is useful for running widget listeners
+	 *
+	 * @see Widget#getOnLoadListener()
+	 */
+	ScriptEvent setSource(Widget widget);
+
 	/**
 	 * Gets the menu index of the event
 	 *
@@ -80,4 +86,11 @@ public interface ScriptEvent
 	 * @return
 	 */
 	int getTypedKeyChar();
+
+	/**
+	 * Executes a cs2 script specified by this event
+	 *
+	 * This method must be ran on the client thread and is not reentrant
+	 */
+	void run();
 }