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package com.sun.star.report.pentaho.styles;
import org.jfree.layouting.input.style.values.CSSNumericType;
import org.jfree.layouting.input.style.values.CSSNumericValue;
/**
* A helper class that sums up various CSS-length. The various unit types are
* kept separate until the final result is computed to minimize the computation
* inaccuracy.
*
* @author Thomas Morgner
* @since 15.03.2007
*/
public class LengthCalculator
{
// and centimeter (x10)
private double millimeter;
// and pica (x12) and inch(x72). Px is assumed to be in 96dpi.
private double point;
private double pixel;
public LengthCalculator()
{
}
public void add (final CSSNumericValue value)
{
if (value == null)
{
return;
}
final CSSNumericType numericType = value.getType();
if (numericType == CSSNumericType.CM)
{
millimeter += value.getValue() * 10;
}
else if (numericType == CSSNumericType.MM)
{
millimeter += value.getValue();
}
else if (numericType == CSSNumericType.PT)
{
point += value.getValue();
}
else if (numericType == CSSNumericType.PC)
{
point += 12 * value.getValue();
}
else if (numericType == CSSNumericType.INCH)
{
point += 72 * value.getValue();
}
else if (numericType == CSSNumericType.PX)
{
pixel += value.getValue();
}
// LOGGER.debug ("Adding " + value + " [mm: " + millimeter + "] [pt: " + point + "] px: [" + pixel + "]");
}
public CSSNumericValue getResult ()
{
if (pixel == 0 && point == 0)
{
return CSSNumericValue.createValue(CSSNumericType.MM, millimeter);
}
if (pixel == 0 && millimeter == 0)
{
return CSSNumericValue.createValue(CSSNumericType.PT, point);
}
if (point == 0 && millimeter == 0)
{
return CSSNumericValue.createValue(CSSNumericType.PX, pixel);
}
// else convert it.
double result = point;
result += (millimeter * 10 * 72 / 254);
result += pixel * 72 / 96;
return CSSNumericValue.createValue(CSSNumericType.PT, result);
}
}