/*

 * Copyright (c) 2006, 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 java.awt;

/**

 * The {@code GridBagLayoutInfo} is an utility class for

 * {@code GridBagLayout} layout manager.

 * It stores align, size and baseline parameters for every component within a container.

 *

 * @see       java.awt.GridBagLayout

 * @see       java.awt.GridBagConstraints

 * @since 1.6

 */

public class GridBagLayoutInfo implements java.io.Serializable {

    /*

     * serialVersionUID

     */

    private static final long serialVersionUID = -4899416460737170217L;

    int width, height;          /* number of  cells: horizontal and vertical */

    int startx, starty;         /* starting point for layout */

    int minWidth[];             /* largest minWidth in each column */

    int minHeight[];            /* largest minHeight in each row */

    double weightX[];           /* largest weight in each column */

    double weightY[];           /* largest weight in each row */

    boolean hasBaseline;        /* Whether or not baseline layout has been

                                 * requested and one of the components

                                 * has a valid baseline. */

    // These are only valid if hasBaseline is true and are indexed by

    // row.

    short baselineType[];       /* The type of baseline for a particular

                                 * row.  A mix of the BaselineResizeBehavior

                                 * constants (1 << ordinal()) */

    int maxAscent[];            /* Max ascent (baseline). */

    int maxDescent[];           /* Max descent (height - baseline) */

    /**

     * Creates an instance of GridBagLayoutInfo representing {@code GridBagLayout}

     * grid cells with it's own parameters.

     * @param width the columns

     * @param height the rows

     * @since 1.6

     */

    GridBagLayoutInfo(int width, int height) {

        this.width = width;

        this.height = height;

    }

    /**

     * Returns true if the specified row has any component aligned on the

     * baseline with a baseline resize behavior of CONSTANT_DESCENT.

     */

    boolean hasConstantDescent(int row) {

        return ((baselineType[row] & (1 << Component.BaselineResizeBehavior.

                                      CONSTANT_DESCENT.ordinal())) != 0);

    }

    /**

     * Returns true if there is a baseline for the specified row.

     */

    boolean hasBaseline(int row) {

        return (hasBaseline && baselineType[row] != 0);

    }

}