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/*
* SVG Salamander
* Copyright (c) 2004, Mark McKay
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
* - 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.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*
* Mark McKay can be contacted at mark@kitfox.com. Salamander and other
* projects can be found at http://www.kitfox.com
*
* Created on August 15, 2004, 3:31 AM
*/
package com.kitfox.svg.animation;
import java.util.regex.*;
/**
* SVG has a complicated way of specifying time. Potentially, a time could
* be represened as a summation of discrete times and times of other animation
* events. This provides a root for the many elements we will need to define
* time.
*
* @author Mark McKay
* @author <a href="mailto:mark@kitfox.com">Mark McKay</a>
*/
abstract public class TimeBase
{
static final Matcher matchIndefinite = Pattern.compile("\\s*indefinite\\s*").matcher("");
static final Matcher matchUnitTime = Pattern.compile("\\s*([-+]?((\\d*\\.\\d+)|(\\d+))([-+]?[eE]\\d+)?)\\s*(h|min|s|ms)?\\s*").matcher("");
/*
public static TimeBase parseTime(String text)
{
if (text == null) return null;
if (text.indexOf('+') == -1)
{
return parseTimeComponent(text);
}
return new TimeCompound(text);
}
*/
protected static TimeBase parseTimeComponent(String text)
{
matchIndefinite.reset(text);
if (matchIndefinite.matches()) return new TimeIndefinite();
matchUnitTime.reset(text);
if (matchUnitTime.matches())
{
String val = matchUnitTime.group(1);
String units = matchUnitTime.group(6);
double time = 0;
try { time = Double.parseDouble(val); }
catch (Exception e) {}
if (units.equals("ms")) time *= .001;
else if (units.equals("min")) time *= 60;
else if (units.equals("h")) time *= 3600;
return new TimeDiscrete(time);
}
return null;
}
/**
* Calculates the (greater than or equal to 0) time in seconds this
* time represents. If the time cannot be determined, returns
* Double.NaN. If this represents an infinte amount of time, returns
* Double.POSITIVE_INFINITY.
*/
abstract public double evalTime();
/**
* Some time elements need to refer to the animation element that contains
* them to evaluate correctly
*/
public void setParentElement(AnimationElement ele)
{
}
}
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