EventXmlFormat.java

/*
 * Copyright (C) 2010 Medo <smaxein@googlemail.com>
 * Copyright (C) 2006 Clam <clamisgood@gmail.com>
 * 
 * This file is part of GmkSplitter.
 * GmkSplitter is free software and comes with ABSOLUTELY NO WARRANTY.
 * See LICENSE for details.
 */
package com.ganggarrison.gmdec.xml;

import org.lateralgm.file.GmFile;
import org.lateralgm.resources.GmObject;
import org.lateralgm.resources.sub.Action;
import org.lateralgm.resources.sub.Event;
import org.lateralgm.resources.sub.MainEvent;

import com.ganggarrison.easyxml.XmlReader;
import com.ganggarrison.easyxml.XmlWriter;
import com.ganggarrison.gmdec.DeferredReferenceCreator;
import com.ganggarrison.gmdec.DeferredReferenceCreatorNotifier;
import com.ganggarrison.gmdec.LgmConst;

public class EventXmlFormat extends XmlFormat<Event> {
	@Override
	public void write(Event event, XmlWriter out) {
		out.startElement("event");
		{
			out.putAttribute("category", LgmConst.toString((byte) event.mainId, MainEventType.class));
			// TODO: Trigger events need special attention too.
			if (event.mainId == MainEvent.EV_COLLISION) {
				out.putAttribute("with", getRefStr(event.other));
			} else {
				out.putAttribute("id", event.id);
			}
			out.startElement("actions");
			for (Action act : event.actions) {
				new ActionXmlFormat().write(act, out);
			}
			out.endElement();
		}
		out.endElement();
	}

	@Override
	public Event read(XmlReader reader, DeferredReferenceCreatorNotifier notifier) {
		Event event = new Event();

		reader.enterElement("event");
		{
			int category = LgmConst.fromString(reader.getStringAttribute("category"), MainEventType.class);
			event.mainId = category;

			if (event.mainId == MainEvent.EV_COLLISION) {
				ReferenceCreator rc = new ReferenceCreator(event);
				rc.setRef(reader.getStringAttribute("with"));
				notifier.addDeferredReferenceCreator(rc);
			} else {
				event.id = reader.getIntAttribute("id");
			}

			reader.enterElement("actions");
			while (reader.hasNextElement()) {
				event.actions.add(new ActionXmlFormat().read(reader, notifier));
			}
			reader.leaveElement();
		}
		reader.leaveElement();
		return event;
	}

	private static enum MainEventType implements LgmConst.Provider {
		CREATE(MainEvent.EV_CREATE),
		DESTROY(MainEvent.EV_DESTROY),
		ALARM(MainEvent.EV_ALARM),
		STEP(MainEvent.EV_STEP),
		COLLISION(MainEvent.EV_COLLISION),
		KEYBOARD(MainEvent.EV_KEYBOARD),
		MOUSE(MainEvent.EV_MOUSE),
		OTHER(MainEvent.EV_OTHER),
		DRAW(MainEvent.EV_DRAW),
		KEYPRESS(MainEvent.EV_KEYPRESS),
		KEYRELEASE(MainEvent.EV_KEYRELEASE),
		TRIGGER(MainEvent.EV_TRIGGER);

		public final byte lgmconst;

		private MainEventType(byte lgmconst) {
			this.lgmconst = lgmconst;
		}

		@Override
		public byte getLgmConst() {
			return lgmconst;
		}
	}

	private static class ReferenceCreator implements DeferredReferenceCreator {
		private Event event;
		private String name;

		public ReferenceCreator(Event event) {
			this.event = event;
		}

		public void setRef(String name) {
			this.name = name;
		}

		@Override
		public void createReferences(GmFile gmf) {
			GmObject collisionObject = gmf.resMap.getList(GmObject.class).get(name);
			if (collisionObject != null) {
				event.other = collisionObject.reference;
				event.id = collisionObject.getId();
			} else {
				System.err.println("Warning: GM-Event references unknown "
						+ "collision object " + name);
			}
		}
	}
}