/*-- $Id: SVGAngleImpl.java,v 1.3 2000/11/16 00:29:33 keiron Exp $ --

 ============================================================================
                   The Apache Software License, Version 1.1
 ============================================================================

    Copyright (C) 1999 The Apache Software Foundation. All rights reserved.

 Redistribution and use in source and binary forms, with or without modifica-
 tion, are permitted provided that the following conditions are met:

 1. Redistributions of  source code must  retain the above copyright  notice,
    this list of conditions and the following disclaimer.

 2. Redistributions in binary form must reproduce the above copyright notice,
    this list of conditions and the following disclaimer in the documentation
    and/or other materials provided with the distribution.

 3. The end-user documentation included with the redistribution, if any, must
    include  the following  acknowledgment:  "This product includes  software
    developed  by the  Apache Software Foundation  (http://www.apache.org/)."
    Alternately, this  acknowledgment may  appear in the software itself,  if
    and wherever such third-party acknowledgments normally appear.

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    endorse  or promote  products derived  from this  software without  prior
    written permission. For written permission, please contact
    apache@apache.org.

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 INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 FITNESS  FOR A PARTICULAR  PURPOSE ARE  DISCLAIMED.  IN NO  EVENT SHALL  THE
 APACHE SOFTWARE  FOUNDATION  OR ITS CONTRIBUTORS  BE LIABLE FOR  ANY DIRECT,
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 THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 This software  consists of voluntary contributions made  by many individuals
 on  behalf of the Apache Software  Foundation and was  originally created by
 James Tauber <jtauber@jtauber.com>. For more  information on the Apache
 Software Foundation, please see <http://www.apache.org/>.

 */
package org.apache.fop.dom.svg;

import org.apache.fop.fo.Property;

import java.util.*;
import java.text.*;

import org.w3c.dom.svg.*;

/**
 * SVG Angle.
 *
 * @author Keiron Liddle <keiron@aftexsw.com>
 * modified Nov 14,2000 Mike Crowe <crowe@psilongbeach.com>, Fop internal
 * representation of angles is in degrees, added convert before doing any trig
 * function
 */
public class SVGAngleImpl implements SVGAngle {
    float value = 0;
    short unitType = SVG_ANGLETYPE_UNKNOWN;

    public SVGAngleImpl() {
    }

    public short getUnitType() {
        return unitType;
    }

    public float getValue() {
        return value;
    }

    public void setValue(float value) {
        this.value = value;
    }

    public float getValueInSpecifiedUnits() {
        switch (unitType) {
            case SVG_ANGLETYPE_UNKNOWN:
                throw new SVGExceptionImpl(
                  SVGException.SVG_WRONG_TYPE_ERR, "unknown unit type");
                //			break;
            case SVG_ANGLETYPE_UNSPECIFIED:
                throw new SVGExceptionImpl(
                  SVGException.SVG_WRONG_TYPE_ERR, "unknown unit type");
                //			break;
            case SVG_ANGLETYPE_DEG:
                break;
            case SVG_ANGLETYPE_RAD:
                break;
            case SVG_ANGLETYPE_GRAD:
                break;
        }
        return 0;
    }

    public void setValueInSpecifiedUnits(float valueInSpecifiedUnits) {
        switch (unitType) {
            case SVG_ANGLETYPE_UNKNOWN:
                throw new SVGExceptionImpl(
                  SVGException.SVG_WRONG_TYPE_ERR, "unknown unit type");
                //			break;
            case SVG_ANGLETYPE_UNSPECIFIED:
                throw new SVGExceptionImpl(
                  SVGException.SVG_WRONG_TYPE_ERR, "unknown unit type");
                //			break;
            case SVG_ANGLETYPE_DEG:
                break;
            case SVG_ANGLETYPE_RAD:
                break;
            case SVG_ANGLETYPE_GRAD:
                break;
        }
    }

    public String getValueAsString() {
        NumberFormat nf = NumberFormat.getInstance();
        return nf.format(value);
    }

    /**
     *The following is from CR-SVG-20000802 4.1 Basic Data Types;
     * <angle>: An angle value is a <number> optionally followed
     * immediately with an angle unit identifier. Angle unit identifiers are:
     * deg: degrees m
     * grad: grads m
     * rad: radians m
     * For properties defined in [CSS2], an angle unit identifier must be
     * provided. For SVG-specific attributes and properties, the angle unit
     * identifier is optional. If not provided, the angle value is assumed to be
     * in degrees.
     */
    public void setValueAsString(String valueAsString) {
        NumberFormat nf = NumberFormat.getInstance();
        try {
            value = nf.parse(valueAsString).floatValue();
            if (valueAsString.indexOf("grad") != -1) {
                value = (float)(value * 360.0 / 400.0);
            } else if (valueAsString.indexOf("rad") != -1) {
                value = (float)(value * 180.0 / Math.PI);
            }
        } catch (ParseException pe) {
            value = 0;
        }
    }

    public float getAnimatedValue() {
        return 0;
    }

    public void newValueSpecifiedUnits (short unitType,
                                        float valueInSpecifiedUnits) throws SVGException {
        switch (unitType) {
            case SVG_ANGLETYPE_UNKNOWN:
                throw new SVGExceptionImpl(
                  SVGException.SVG_WRONG_TYPE_ERR, "unknown unit type");
                //			break;
            case SVG_ANGLETYPE_UNSPECIFIED:
                throw new SVGExceptionImpl(
                  SVGException.SVG_WRONG_TYPE_ERR, "unknown unit type");
                //			break;
            case SVG_ANGLETYPE_DEG:
                value = (float)(valueInSpecifiedUnits * Math.PI / 90.0);
                break;
            case SVG_ANGLETYPE_RAD:
                value = valueInSpecifiedUnits;
                break;
            case SVG_ANGLETYPE_GRAD:
                value = (float)(valueInSpecifiedUnits * Math.PI / 90.0);
                break;
        }
        this.unitType = unitType;
    }

    public void convertToSpecifiedUnits (short unitType)
    throws SVGException {
        switch (unitType) {
            case SVG_ANGLETYPE_UNKNOWN:
                throw new SVGExceptionImpl(
                  SVGException.SVG_WRONG_TYPE_ERR, "unknown unit type");
                //			break;
            case SVG_ANGLETYPE_UNSPECIFIED:
                throw new SVGExceptionImpl(
                  SVGException.SVG_WRONG_TYPE_ERR, "unknown unit type");
                //			break;
            case SVG_ANGLETYPE_DEG:
                break;
            case SVG_ANGLETYPE_RAD:
                break;
            case SVG_ANGLETYPE_GRAD:
                break;
        }
        this.unitType = unitType;
    }
}
