fop/src/org/apache/fop/dom/svg/SVGLengthListImpl.java

/*-- $Id$ -- 

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                   The Apache Software License, Version 1.1
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    include  the following  acknowledgment:  "This product includes  software
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 on  behalf of the Apache Software  Foundation and was  originally created by
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package org.apache.fop.dom.svg;

import org.apache.fop.fo.Property;
import org.apache.fop.messaging.MessageHandler;

import java.util.*;

import org.w3c.dom.svg.*;

/**
 * a length quantity in XSL
 */
public class SVGLengthListImpl extends SVGListImpl implements SVGLengthList {

	protected float millipoints = 0;
	protected Vector valueList = new Vector();

	protected float fontsize = 12;

	public void setValueAsString( String valueAsString )
	{
		convert(valueAsString);
	}

	/**
	 * set the length given a particular String specifying length and units
	 */
	public SVGLengthListImpl (String len) {
		convert(len);
	}

	public SVGLengthListImpl () {
	}

	/**
	 * set the length given a particular String specifying length and units,
	 * and the font-size (necessary for an em)
	 */
	public SVGLengthListImpl (String len, int fontsize)
	{
		this.fontsize = fontsize;
		convert(len);
	}

	protected void convert(String len)
	{
		int l = len.length();

		if (l == 0) {
			MessageHandler.errorln("WARNING: empty length");
			this.millipoints = 0;
		} else {
			// could be an array of points, as in for svg:text
			int pos;
			pos = len.trim().indexOf(" ");
			if(pos != -1) {
				this.millipoints = 0;
				StringTokenizer st = new StringTokenizer(len.trim());
				while(st.hasMoreTokens()) {
					String val = st.nextToken();
					float dvalue = getFloatValue(val, val.length());
					float intValue = dvalue;
					this.valueList.addElement(new Float(intValue));
				}
			} else {
				float dvalue = getFloatValue(len, l);
				this.millipoints = dvalue;
				this.valueList.addElement(new Float(millipoints));
			}
		}
	}

	protected float getFloatValue(String len, int l)
	{
		int assumed_resolution = 1; // points/pixel

		float dvalue;
		try {
			if(len.endsWith("in")) {
				dvalue = Float.valueOf(len.substring(0,(l-2))).floatValue();
				dvalue = dvalue * 72;
			} else if(len.endsWith("cm")) {
				dvalue = Float.valueOf(len.substring(0,(l-2))).floatValue();
				dvalue = dvalue * 28.35f;
			} else if(len.endsWith("mm")) {
				dvalue = Float.valueOf(len.substring(0,(l-2))).floatValue();
				dvalue = dvalue * 2.84f;
			} else if(len.endsWith("pt")) {
				dvalue = Float.valueOf(len.substring(0,(l-2))).floatValue();
				dvalue = dvalue;
			} else if(len.endsWith("pc")) {
				dvalue = Float.valueOf(len.substring(0,(l-2))).floatValue();
				dvalue = dvalue * 12;
			} else if(len.endsWith("em")) {
				dvalue = Float.valueOf(len.substring(0,(l-2))).floatValue();
				dvalue = dvalue * fontsize;
			} else if(len.endsWith("px")) {
				dvalue = Float.valueOf(len.substring(0,(l-2))).floatValue();
				dvalue = dvalue * assumed_resolution;
			} else if(len.endsWith("%")) {
				dvalue = Float.valueOf(len.substring(0,(l-1))).floatValue() / 100f; //??
			} else {
				dvalue = Float.valueOf(len).floatValue();
			}
		} catch (Exception e) {
			dvalue = 0;
			MessageHandler.errorln("ERROR: unknown length units in " + len);
		}
		return dvalue;
	}

	/**
	 * return the length in 1/1000ths of a point
	 */
	public Vector valueList()
	{
		return this.valueList;
	}
}