Launcher.java

// 
//  Copyright 2012 MultiMC Contributors
// 
//    Licensed under the Apache License, Version 2.0 (the "License");
//    you may not use this file except in compliance with the License.
//    You may obtain a copy of the License at
// 
//        http://www.apache.org/licenses/LICENSE-2.0
// 
//    Unless required by applicable law or agreed to in writing, software
//    distributed under the License is distributed on an "AS IS" BASIS,
//    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
//    See the License for the specific language governing permissions and
//    limitations under the License.
//

package net.minecraft;

import java.applet.Applet;
import java.applet.AppletStub;
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.Graphics;
import java.net.URL;
import java.util.Map;
import java.util.TreeMap;

public class Launcher extends Applet implements AppletStub {
    private static final long serialVersionUID = 650301905124333449L;
    private Applet wrappedApplet;
    private URL documentBase;
    private boolean active = false;
    private final Map<String, String> params;

    public Launcher(Applet applet, URL documentBase) {
        params = new TreeMap<String, String>();

        this.setLayout(new BorderLayout());
        this.add(applet, "Center");
        this.wrappedApplet = applet;
        this.documentBase = documentBase;
    }

    public void setParameter(String name, String value) {
        params.put(name, value);
    }

    public void replace(Applet applet) {
        this.wrappedApplet = applet;

        applet.setStub(this);
        applet.setSize(getWidth(), getHeight());

        this.setLayout(new BorderLayout());
        this.add(applet, "Center");

        applet.init();
        active = true;
        applet.start();
        validate();
    }

    @Override
    public String getParameter(String name) {
        String param = params.get(name);
        if (param != null) {
            return param;
        }
        try {
            return super.getParameter(name);
        } catch (Exception ignore) {
        }
        return null;
    }

    @Override
    public boolean isActive() {
        return active;
    }

    @Override
    public void appletResize(int width, int height) {
        wrappedApplet.resize(width, height);
    }

    @Override
    public void resize(int width, int height) {
        wrappedApplet.resize(width, height);
    }

    @Override
    public void resize(Dimension d) {
        wrappedApplet.resize(d);
    }

    @Override
    public void init() {
        if (wrappedApplet != null) {
            wrappedApplet.init();
        }
    }

    @Override
    public void start() {
        wrappedApplet.start();
        active = true;
    }

    @Override
    public void stop() {
        wrappedApplet.stop();
        active = false;
    }

    public void destroy() {
        wrappedApplet.destroy();
    }

    @Override
    public URL getCodeBase() {
        return wrappedApplet.getCodeBase();
    }

    @Override
    public URL getDocumentBase() {
        return documentBase;
    }

    @Override
    public void setVisible(boolean b) {
        super.setVisible(b);
        wrappedApplet.setVisible(b);
    }

    public void update(Graphics paramGraphics) {
    }

    public void paint(Graphics paramGraphics) {
    }
}