| gvSIG desktop 1

/*

 * Copyright 1998 Sun Microsystems, Inc.  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.  Sun designates this

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

 * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

 * CA 95054 USA or visit www.sun.com if you need additional information or

 * have any questions.

 */

package org.gvsig.openjdk.v1_6.sun.awt.geom;

final class CurveLink {

    Curve curve;

    double ytop;

    double ybot;

    int etag;

    CurveLink next;

    CurveLink(Curve curve, double ystart, double yend, int etag) {

        this.curve = curve;

        this.ytop = ystart;

        this.ybot = yend;

        this.etag = etag;

        if (ytop < curve.getYTop() || ybot > curve.getYBot()) {

            throw new InternalError("bad curvelink ["+ytop+"=>"+ybot+"] for "+curve);

        }

    }

    public boolean absorb(CurveLink link) {

        return absorb(link.curve, link.ytop, link.ybot, link.etag);

    }

    public boolean absorb(Curve curve, double ystart, double yend, int etag) {

        if (this.curve != curve || this.etag != etag ||

            ybot < ystart || ytop > yend)

        {

            return false;

        }

        if (ystart < curve.getYTop() || yend > curve.getYBot()) {

            throw new InternalError("bad curvelink ["+ystart+"=>"+yend+"] for "+curve);

        }

        this.ytop = Math.min(ytop, ystart);

        this.ybot = Math.max(ybot, yend);

        return true;

    }

    public boolean isEmpty() {

        return (ytop == ybot);

    }

    public Curve getCurve() {

        return curve;

    }

    public Curve getSubCurve() {

        if (ytop == curve.getYTop() && ybot == curve.getYBot()) {

            return curve.getWithDirection(etag);

        }

        return curve.getSubCurve(ytop, ybot, etag);

    }

    public Curve getMoveto() {

        return new Order0(getXTop(), getYTop());

    }

    public double getXTop() {

        return curve.XforY(ytop);

    }

    public double getYTop() {

        return ytop;

    }

    public double getXBot() {

        return curve.XforY(ybot);

    }

    public double getYBot() {

        return ybot;

    }

    public double getX() {

        return curve.XforY(ytop);

    }

    public int getEdgeTag() {

        return etag;

    }

    public void setNext(CurveLink link) {

        this.next = link;

    }

    public CurveLink getNext() {

        return next;

    }

}