/*
* This program is free software; you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License, version 2.1 as published by the Free Software
* Foundation.
*
* You should have received a copy of the GNU Lesser General Public License along with this
* program; if not, you can obtain a copy at http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
* or from the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* This program 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 Lesser General Public License for more details.
*
* Copyright (c) 2001 - 2009 Object Refinery Ltd, Pentaho Corporation and Contributors.. All rights reserved.
*/
package org.pentaho.reporting.engine.classic.core.modules.output.table.xls.helper;
import java.awt.Color;
import java.util.HashMap;
import org.apache.poi.ss.usermodel.Font;
import org.apache.poi.ss.usermodel.Workbook;
/**
* This class keeps track of all fonts that we have used so far in our Excel file.
* <p/>
* Excel fonts should never be created directly, as excel does not like the idea of having too many font definitions.
*
* @author Heiko Evermann
*/
public class ExcelFontFactory
{
/**
* The list of fonts that we have used so far.
*/
private HashMap fonts;
/**
* The workbook that is used to create the font.
*/
private final Workbook workbook;
/**
* Constructor for ExcelFontFactory.
*
* @param workbook the workbook.
*/
public ExcelFontFactory(final Workbook workbook,
final ExcelColorProducer colorProducer)
{
if (workbook == null)
{
throw new NullPointerException();
}
if (colorProducer == null)
{
throw new NullPointerException();
}
this.fonts = new HashMap();
this.workbook = workbook;
// read the fonts from the workbook ...
// Funny one: Please note that the layout will be broken if the first
// font is not 'Arial 10'.
final short numberOfFonts = this.workbook.getNumberOfFonts();
for (int i = 0; i < numberOfFonts; i++)
{
final Font font = workbook.getFontAt((short) i);
this.fonts.put(new HSSFFontWrapper(font), font);
}
// add the default font
// this MUST be the first one, that is created.
// oh, I hate Excel ...
final HSSFFontWrapper wrapper = new HSSFFontWrapper
("Arial", (short) 10, false, false, false, false, colorProducer.getNearestColor(Color.black));
getExcelFont(wrapper);
}
/**
* Creates a HSSFFont. The created font is cached and reused later, if a similiar font is requested.
*
* @param wrapper the font information that should be used to produce the excel font
* @return the created or a cached HSSFFont instance
*/
public Font getExcelFont(final HSSFFontWrapper wrapper)
{
if (wrapper == null)
{
throw new NullPointerException();
}
if (fonts.containsKey(wrapper))
{
return (Font) fonts.get(wrapper);
}
// ok, we need a new one ...
final Font excelFont = createFont(wrapper);
fonts.put(wrapper, excelFont);
return excelFont;
}
/**
* Returns the excel font stored in this wrapper.
*
* @param wrapper the font wrapper that holds all font information from the repagination.
* @return the created font.
*/
private Font createFont(final HSSFFontWrapper wrapper)
{
final Font font = workbook.createFont();
if (wrapper.isBold())
{
font.setBoldweight(Font.BOLDWEIGHT_BOLD);
}
else
{
font.setBoldweight(Font.BOLDWEIGHT_NORMAL);
}
font.setColor(wrapper.getColorIndex());
font.setFontName(wrapper.getFontName());
font.setFontHeightInPoints((short) wrapper.getFontHeight());
font.setItalic(wrapper.isItalic());
font.setStrikeout(wrapper.isStrikethrough());
if (wrapper.isUnderline())
{
font.setUnderline(Font.U_SINGLE);
}
else
{
font.setUnderline(Font.U_NONE);
}
return font;
}
}