/**

 * Back 2 Browser Bytecode Translator

 * Copyright (C) 2012 Jaroslav Tulach <jaroslav.tulach@apidesign.org>

 *

 * This program is free software: you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation, version 2 of the License.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program. Look for COPYING file in the top folder.

 * If not, see http://opensource.org/licenses/GPL-2.0.

 */

package org.apidesign.vm4brwsr;

import net.java.html.js.JavaScriptBody;

import net.java.html.js.JavaScriptResource;

/**

 *

 * @author Jaroslav Tulach <jtulach@netbeans.org>

 */

@JavaScriptResource("htmlannotations.js")

public class HtmlAnnotations {

    private Object callback;

    @JavaScriptBody(args = {}, body = "return 42;")

    public static int fourtyTwo() {

        return -1;

    }

    @JavaScriptBody(args = { "x", "y" }, body = "return mul(x, y);")

    public static native int useExternalMul(int x, int y);

    public static int callback() {

        final int[] arr = { 0 };

        callback(new Runnable() {

            @Override

            public void run() {

                arr[0]++;

            }

        });

        return arr[0];

    }

    @JavaScriptBody(args = { "r" }, javacall=true, body = "r.@java.lang.Runnable::run()()")

    private static native void callback(Runnable r);

    @JavaScriptBody(args = {  }, javacall = true, body = "return @org.apidesign.vm4brwsr.HtmlAnnotations::callback()();")

    public static native int staticCallback();

    protected long chooseLong(boolean takeFirst, boolean takeSecond, long first, long second) {

        long l = 0;

        if (takeFirst) l += first;

        if (takeSecond) l += second;

        return l;

    }

    protected void onError(Object obj) throws Exception {

        callback = obj;

    }

    Object getError() {

        return callback;

    }

    public static Object create() {

        return new HtmlAnnotations();

    }

    @JavaScriptBody(args = { "impl", "a", "b" }, javacall = true, body = 

        "return impl.@org.apidesign.vm4brwsr.HtmlAnnotations::chooseLong(ZZJJ)(true, false, a, b);"

    )

    public static native long first(Object impl, long a, long b);

    @JavaScriptBody(args = { "impl", "d" }, javacall = true, body = 

        "impl.@org.apidesign.vm4brwsr.HtmlAnnotations::onError(Ljava/lang/Object;)(d);" +

        "return impl.@org.apidesign.vm4brwsr.HtmlAnnotations::getError()();"

    )

    public static native Double onError(Object impl, Double d);

}