/*

 * Copyright (c) 2011, 2012, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code 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

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

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

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

package apple.laf;

public class JRSUIFocus {

    private static final int SUCCESS = 0;

    private static final int NULL_PTR = -1;

    private static final int NULL_CG_REF = -2;

    // from HITheme.h

    public static final int RING_ONLY = 0;

    public static final int RING_ABOVE = 1;

    public static final int RING_BELOW = 2;

    private static native int beginNativeFocus(final long cgContext, final int ringStyle);

    private static native int endNativeFocus(final long cgContext);

    final long cgContext;

    public JRSUIFocus(final long cgContext) {

        this.cgContext = cgContext;

    }

    public void beginFocus(final int ringStyle) {

        testForFailure(beginNativeFocus(cgContext, ringStyle));

    }

    public void endFocus() {

        testForFailure(endNativeFocus(cgContext));

    }

    static void testForFailure(final int status) {

        if (status == SUCCESS) return;

        switch(status) {

            case NULL_PTR: throw new RuntimeException("Null pointer exception in native JRSUI");

            case NULL_CG_REF: throw new RuntimeException("Null CG reference in native JRSUI");

            default: throw new RuntimeException("JRSUI draw focus problem: " + status);

        }

    }

}