/*

 * Copyright (c) 2005, 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 sun.swing.text;

import java.util.*;

import java.awt.Graphics;

import java.awt.print.*;

/**

 * Printable to merge multiple printables into one.

 *

 * @author Igor Kushnirskiy

 *

 * @since 1.6

 */

class CompoundPrintable implements CountingPrintable {

    private final Queue<CountingPrintable> printables;

    private int offset = 0;

    public CompoundPrintable(List<CountingPrintable> printables) {

        this.printables = new LinkedList<CountingPrintable>(printables);

    }

    public int print(final Graphics graphics,

                     final PageFormat pf,

                     final int pageIndex) throws PrinterException {

        int ret = NO_SUCH_PAGE;

        while (printables.peek() != null) {

            ret = printables.peek().print(graphics, pf, pageIndex - offset);

            if (ret == PAGE_EXISTS) {

                break;

            } else {

                offset += printables.poll().getNumberOfPages();

            }

        }

        return ret;

    }

    /**

     * Returns the number of pages in this printable.

     * <p>

     * This number is defined only after {@code print} returns NO_SUCH_PAGE.

     *

     * @return the number of pages.

     */

    public int getNumberOfPages() {

        return offset;

    }

}