/*
 * JasperReports - Free Java Reporting Library.
 * Copyright (C) 2001 - 2009 Jaspersoft Corporation. All rights reserved.
 * http://www.jaspersoft.com
 *
 * Unless you have purchased a commercial license agreement from Jaspersoft,
 * the following license terms apply:
 *
 * This program is part of JasperReports.
 *
 * JasperReports is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * JasperReports 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.
 * 
 * You should have received a copy of the GNU Lesser General Public License
 * along with JasperReports. If not, see <http://www.gnu.org/licenses/>.
 */

/*
 * Special thanks to Google 'Summer of Code 2005' program for supporting this development
 *
 * Contributors:
 * Majid Ali Khan - majidkk@users.sourceforge.net
 * Frank Sch�nheit - Frank.Schoenheit@Sun.COM
 */
package net.sf.jasperreports.engine.export.oasis;

import java.awt.Color;
import java.awt.Dimension;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.io.Writer;
import java.text.AttributedCharacterIterator;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;
import java.util.Locale;
import java.util.Map;

import net.sf.jasperreports.engine.JRAbstractExporter;
import net.sf.jasperreports.engine.JRException;
import net.sf.jasperreports.engine.JRExporterParameter;
import net.sf.jasperreports.engine.JRGenericPrintElement;
import net.sf.jasperreports.engine.JRImageRenderer;
import net.sf.jasperreports.engine.JRLineBox;
import net.sf.jasperreports.engine.JRPen;
import net.sf.jasperreports.engine.JRPrintElement;
import net.sf.jasperreports.engine.JRPrintElementIndex;
import net.sf.jasperreports.engine.JRPrintEllipse;
import net.sf.jasperreports.engine.JRPrintFrame;
import net.sf.jasperreports.engine.JRPrintHyperlink;
import net.sf.jasperreports.engine.JRPrintImage;
import net.sf.jasperreports.engine.JRPrintLine;
import net.sf.jasperreports.engine.JRPrintPage;
import net.sf.jasperreports.engine.JRPrintRectangle;
import net.sf.jasperreports.engine.JRPrintText;
import net.sf.jasperreports.engine.JRRenderable;
import net.sf.jasperreports.engine.JRRuntimeException;
import net.sf.jasperreports.engine.JRWrappingSvgRenderer;
import net.sf.jasperreports.engine.JasperPrint;
import net.sf.jasperreports.engine.base.JRBaseLineBox;
import net.sf.jasperreports.engine.export.CutsInfo;
import net.sf.jasperreports.engine.export.ExporterFilter;
import net.sf.jasperreports.engine.export.ExporterNature;
import net.sf.jasperreports.engine.export.JRExportProgressMonitor;
import net.sf.jasperreports.engine.export.JRExporterGridCell;
import net.sf.jasperreports.engine.export.JRGridLayout;
import net.sf.jasperreports.engine.export.JRHyperlinkProducer;
import net.sf.jasperreports.engine.export.zip.ExportZipEntry;
import net.sf.jasperreports.engine.export.zip.FileBufferedZipEntry;
import net.sf.jasperreports.engine.type.ModeEnum;
import net.sf.jasperreports.engine.util.JRStringUtil;
import net.sf.jasperreports.engine.util.JRStyledText;


/**
 * Exports a JasperReports document to ODF format. It has character output type and exports the document to a
 * grid-based layout.
 * @author Teodor Danciu (teodord@users.sourceforge.net)
 * @version $Id: JROpenDocumentExporter.java 3678 2010-04-02 12:13:06Z shertage $
 */
public abstract class JROpenDocumentExporter extends JRAbstractExporter
{
	/**
	 *
	 */
	protected static final String JR_PAGE_ANCHOR_PREFIX = "JR_PAGE_ANCHOR_";

	public static final String IMAGE_NAME_PREFIX = "img_";
	protected static final int IMAGE_NAME_PREFIX_LEGTH = IMAGE_NAME_PREFIX.length();

	/**
	 *
	 */
	protected Writer tempBodyWriter = null;
	protected Writer tempStyleWriter = null;

	protected JRExportProgressMonitor progressMonitor = null;
	protected Map rendererToImagePathMap = null;
	protected Map imageMaps;
	protected List imagesToProcess = null;

	protected int reportIndex = 0;
	protected int pageIndex = 0;
	protected int tableIndex = 0;
	protected boolean startPage;

	/**
	 *
	 */
	protected String encoding = null;


	/**
	 *
	 */
	protected boolean isWrapBreakWord = false;

	/**
	 * @deprecated
	 */
	protected Map fontMap = null;

	protected LinkedList backcolorStack;
	protected Color backcolor;

	protected StyleCache styleCache = null;

	protected ExporterNature nature = null;

	public JROpenDocumentExporter()
	{
		backcolorStack = new LinkedList();
		backcolor = null;
	}


	/**
	 *
	 */
	public void exportReport() throws JRException
	{
		progressMonitor = (JRExportProgressMonitor)parameters.get(JRExporterParameter.PROGRESS_MONITOR);

		/*   */
		setOffset();

		try
		{
			/*   */
			setExportContext();

			/*   */
			setInput();

			if (!parameters.containsKey(JRExporterParameter.FILTER))
			{
				filter = createFilter(getExporterPropertiesPrefix());
			}

			/*   */
			if (!isModeBatch)
			{
				setPageRange();
			}

			encoding =
				getStringParameterOrDefault(
					JRExporterParameter.CHARACTER_ENCODING,
					JRExporterParameter.PROPERTY_CHARACTER_ENCODING
					);

			rendererToImagePathMap = new HashMap();
			imageMaps = new HashMap();
			imagesToProcess = new ArrayList();

			fontMap = (Map) parameters.get(JRExporterParameter.FONT_MAP);

			setHyperlinkProducerFactory();

			nature = getExporterNature(filter);

			OutputStream os = (OutputStream)parameters.get(JRExporterParameter.OUTPUT_STREAM);
			if (os != null)
			{
				try
				{
					exportReportToOasisZip(os);
				}
				catch (IOException e)
				{
					throw new JRException("Error trying to export to output stream : " + jasperPrint.getName(), e);
				}
			}
			else
			{
				File destFile = (File)parameters.get(JRExporterParameter.OUTPUT_FILE);
				if (destFile == null)
				{
					String fileName = (String)parameters.get(JRExporterParameter.OUTPUT_FILE_NAME);
					if (fileName != null)
					{
						destFile = new File(fileName);
					}
					else
					{
						throw new JRException("No output specified for the exporter.");
					}
				}

				try
				{
					os = new FileOutputStream(destFile);
					exportReportToOasisZip(os);
				}
				catch (IOException e)
				{
					throw new JRException("Error trying to export to file : " + destFile, e);
				}
				finally
				{
					if (os != null)
					{
						try
						{
							os.close();
						}
						catch(IOException e)
						{
						}
					}
				}
			}
		}
		finally
		{
			resetExportContext();
		}
	}


	/**
	 *
	 */
	public static JRPrintImage getImage(List jasperPrintList, String imageName)
	{
		return getImage(jasperPrintList, getPrintElementIndex(imageName));
	}


	public static JRPrintImage getImage(List jasperPrintList, JRPrintElementIndex imageIndex)
	{
		JasperPrint report = (JasperPrint)jasperPrintList.get(imageIndex.getReportIndex());
		JRPrintPage page = (JRPrintPage)report.getPages().get(imageIndex.getPageIndex());

		Integer[] elementIndexes = imageIndex.getAddressArray();
		Object element = page.getElements().get(elementIndexes[0].intValue());

		for (int i = 1; i < elementIndexes.length; ++i)
		{
			JRPrintFrame frame = (JRPrintFrame) element;
			element = frame.getElements().get(elementIndexes[i].intValue());
		}

		return (JRPrintImage) element;
	}


	/**
	 *
	 */
	protected void exportReportToOasisZip(OutputStream os) throws JRException, IOException
	{
		OasisZip oasisZip = new FileBufferedOasisZip(((JROpenDocumentExporterNature)nature).getOpenDocumentNature());

		ExportZipEntry tempBodyEntry = new FileBufferedZipEntry(null);
		ExportZipEntry tempStyleEntry = new FileBufferedZipEntry(null);

		tempBodyWriter = tempBodyEntry.getWriter();
		tempStyleWriter = tempStyleEntry.getWriter();

		styleCache = new StyleCache(tempStyleWriter, fontMap, getExporterKey());

		Writer stylesWriter = oasisZip.getStylesEntry().getWriter();

		StyleBuilder styleBuilder = new StyleBuilder(jasperPrintList, stylesWriter);
		styleBuilder.build();

		stylesWriter.close();

		for(reportIndex = 0; reportIndex < jasperPrintList.size(); reportIndex++)
		{
			setJasperPrint((JasperPrint)jasperPrintList.get(reportIndex));

			List pages = jasperPrint.getPages();
			if (pages != null && pages.size() > 0)
			{
				if (isModeBatch)
				{
					startPageIndex = 0;
					endPageIndex = pages.size() - 1;
				}

				JRPrintPage page = null;
				for(pageIndex = startPageIndex; pageIndex <= endPageIndex; pageIndex++)
				{
					if (Thread.interrupted())
					{
						throw new JRException("Current thread interrupted.");
					}

					page = (JRPrintPage)pages.get(pageIndex);

					exportPage(page);
				}
			}
		}


		tempBodyWriter.flush();
		tempStyleWriter.flush();


		tempBodyWriter.close();
		tempStyleWriter.close();


		/*   */
		ContentBuilder contentBuilder =
			new ContentBuilder(
				oasisZip.getContentEntry(),
				tempStyleEntry,
				tempBodyEntry,
				styleCache.getFontFaces(),
				((JROpenDocumentExporterNature)nature).getOpenDocumentNature()
				);
		contentBuilder.build();

		tempStyleEntry.dispose();
		tempBodyEntry.dispose();

		if ((imagesToProcess != null && imagesToProcess.size() > 0))
		{
			for(Iterator it = imagesToProcess.iterator(); it.hasNext();)
			{
				JRPrintElementIndex imageIndex = (JRPrintElementIndex)it.next();

				JRPrintImage image = getImage(jasperPrintList, imageIndex);
				JRRenderable renderer = image.getRenderer();
				if (renderer.getType() == JRRenderable.TYPE_SVG)
				{
					renderer =
						new JRWrappingSvgRenderer(
							renderer,
							new Dimension(image.getWidth(), image.getHeight()),
							ModeEnum.OPAQUE == image.getModeValue() ? image.getBackcolor() : null
							);
				}

				oasisZip.addEntry(//FIXMEODT optimize with a different implementation of entry
					new FileBufferedZipEntry(
						"Pictures/" + getImageName(imageIndex),
						renderer.getImageData()
						)
					);
			}
		}

		oasisZip.zipEntries(os);

		oasisZip.dispose();
	}


	/**
	 *
	 */
	protected void exportPage(JRPrintPage page) throws JRException, IOException
	{
		startPage = true;
		JRGridLayout layout =
			new JRGridLayout(
				nature,
				page.getElements(),
				jasperPrint.getPageWidth(),
				jasperPrint.getPageHeight(),
				globalOffsetX,
				globalOffsetY,
				null //address
				);

		exportGrid(layout, null);

		if (progressMonitor != null)
		{
			progressMonitor.afterPageExport();
		}
	}


	/**
	 *
	 */
	protected void exportGrid(JRGridLayout gridLayout, JRPrintElementIndex frameIndex) throws IOException, JRException
	{
		CutsInfo xCuts = gridLayout.getXCuts();
		JRExporterGridCell[][] grid = gridLayout.getGrid();

		TableBuilder tableBuilder = frameIndex == null
			? new TableBuilder(reportIndex, pageIndex, tempBodyWriter, tempStyleWriter)
			: new TableBuilder(frameIndex.toString(), tempBodyWriter, tempStyleWriter);

		
		tableBuilder.buildTableStyle(gridLayout.getWidth());
		tableBuilder.buildTableHeader();

		for(int col = 1; col < xCuts.size(); col++)
		{
			tableBuilder.buildColumnStyle(
					col - 1,
					xCuts.getCut(col) - xCuts.getCut(col - 1)
					);
			tableBuilder.buildColumnHeader(col - 1);
			tableBuilder.buildColumnFooter();
		}

		JRPrintElement element = null;
		for(int row = 0; row < grid.length; row++)
		{
			int emptyCellColSpan = 0;
			int emptyCellWidth = 0;
			int rowHeight = gridLayout.getRowHeight(row);

			tableBuilder.buildRowStyle(row, rowHeight);
			tableBuilder.buildRowHeader(row);

			for(int col = 0; col < grid[0].length; col++)
			{
				JRExporterGridCell gridCell = grid[row][col];
				if (gridCell.getType() == JRExporterGridCell.TYPE_OCCUPIED_CELL)
				{
					if (emptyCellColSpan > 0)
					{
						//writeEmptyCell(gridCell, emptyCellColSpan, emptyCellWidth, rowHeight);
						emptyCellColSpan = 0;
						emptyCellWidth = 0;
					}

					//writeOccupiedCells(1);
					exportOccupiedCells(1);
//					OccupiedGridCell occupiedGridCell = (OccupiedGridCell)gridCell;
//					ElementGridCell elementGridCell = (ElementGridCell)grid[occupiedGridCell.getRow()][occupiedGridCell.getCol()];
//					exportOccupiedCells(elementGridCell);
//					col += elementGridCell.getColSpan() - 1;
				}
				else if(gridCell.getWrapper() != null)
				{
					if (emptyCellColSpan > 0)
					{
						//writeEmptyCell(gridCell, emptyCellColSpan, emptyCellWidth, rowHeight);
						emptyCellColSpan = 0;
						emptyCellWidth = 0;
					}

					element = gridCell.getWrapper().getElement();

					if (element instanceof JRPrintLine)
					{
						exportLine(tableBuilder, (JRPrintLine)element, gridCell);
					}
					else if (element instanceof JRPrintRectangle)
					{
						exportRectangle(tableBuilder, (JRPrintRectangle)element, gridCell);
					}
					else if (element instanceof JRPrintEllipse)
					{
						exportEllipse(tableBuilder, (JRPrintEllipse)element, gridCell);
					}
					else if (element instanceof JRPrintImage)
					{
						exportImage(tableBuilder, (JRPrintImage)element, gridCell);
					}
					else if (element instanceof JRPrintText)
					{
						exportText(tableBuilder, (JRPrintText)element, gridCell);
					}
					else if (element instanceof JRPrintFrame)
					{
						exportFrame(tableBuilder, (JRPrintFrame)element, gridCell);
					}
					else if (element instanceof JRGenericPrintElement)
					{
						exportGenericElement(tableBuilder, (JRGenericPrintElement)element, gridCell);
					}

					// //x += gridCell.colSpan - 1;
					//col += gridCell.getColSpan() - 1;
				}
				else
				{
					emptyCellColSpan++;
					emptyCellWidth += gridCell.getWidth();
					exportEmptyCell(gridCell, 1);
				}
			}

//			if (emptyCellColSpan > 0)
//			{
//				//writeEmptyCell(null, emptyCellColSpan, emptyCellWidth, rowHeight);
//			}

			tableBuilder.buildRowFooter();
		}

		tableBuilder.buildTableFooter();
	}


//	private void writeEmptyCell(JRExporterGridCell gridCell, int emptyCellColSpan, int emptyCellWidth, int rowHeight) throws IOException
//	{
//		tempBodyWriter.write("<table:table-cell");
//		//tempBodyWriter.write(" office:value-type=\"string\"");
//		tempBodyWriter.write(" table:style-name=\"empty-cell\"");
//		if (emptyCellColSpan > 1)
//		{
//			tempBodyWriter.write(" table:number-columns-spanned=\"" + emptyCellColSpan + "\"");
//		}
//		tempBodyWriter.write("/>\n");
//
//		writeOccupiedCells(emptyCellColSpan - 1);
//	}
//
//
//	private void writeOccupiedCells(int count) throws IOException
//	{
//		for(int i = 0; i < count; i++)
//		{
//			tempBodyWriter.write("<table:covered-table-cell/>\n");
//		}
//	}


	private void exportEmptyCell(JRExporterGridCell gridCell, int emptyCellColSpan) throws IOException
	{
		tempBodyWriter.write("<table:table-cell");
		//tempBodyWriter.write(" office:value-type=\"string\"");
//		if (gridCell == null)
//		{
//			tempBodyWriter.write(" table:style-name=\"empty-cell\"");
//		}
//		else
		{
			tempBodyWriter.write(" table:style-name=\"" + styleCache.getCellStyle(gridCell) + "\"");
		}
		if (emptyCellColSpan > 1)
		{
			tempBodyWriter.write(" table:number-columns-spanned=\"" + emptyCellColSpan + "\"");
		}
		tempBodyWriter.write("/>\n");

		exportOccupiedCells(emptyCellColSpan - 1);
	}


//	private void exportOccupiedCells(JRExporterGridCell gridCell) throws IOException
//	{
//		tempBodyWriter.write("<table:table-cell");
//		//tempBodyWriter.write(" office:value-type=\"string\"");
//		tempBodyWriter.write(" table:style-name=\"" + styleCache.getCellStyle(gridCell.getElement(), gridCell) + "\"");
//		if (gridCell.getColSpan() > 1)
//		{
//			tempBodyWriter.write(" table:number-columns-spanned=\"" + gridCell.getColSpan() + "\"");
//		}
//		tempBodyWriter.write("/>\n");
//
//		exportOccupiedCells(gridCell.getColSpan() - 1);
//	}


//	private void exportOccupiedCells(JRExporterGridCell gridCell) throws IOException
//	{
//		exportOccupiedCells(gridCell.getColSpan());
//	}


	private void exportOccupiedCells(int count) throws IOException
	{
		for(int i = 0; i < count; i++)
		{
			tempBodyWriter.write("<table:covered-table-cell/>\n");
		}
	}


	/**
	 *
	 */
	protected abstract void exportLine(TableBuilder tableBuilder, JRPrintLine line, JRExporterGridCell gridCell) throws IOException;


	/**
	 *
	 */
	protected void exportRectangle(TableBuilder tableBuilder, JRPrintRectangle rectangle, JRExporterGridCell gridCell) throws IOException
	{
		JRLineBox box = new JRBaseLineBox(null);
		JRPen pen = box.getPen();
		pen.setLineColor(rectangle.getLinePen().getLineColor());
		pen.setLineStyle(rectangle.getLinePen().getLineStyleValue());
		pen.setLineWidth(rectangle.getLinePen().getLineWidth());

		gridCell.setBox(box);//CAUTION: only some exporters set the cell box

		tableBuilder.buildCellHeader(styleCache.getCellStyle(gridCell), gridCell.getColSpan(), gridCell.getRowSpan());
		tableBuilder.buildCellFooter();
	}


	/**
	 *
	 */
	protected abstract void exportEllipse(TableBuilder tableBuilder, JRPrintEllipse ellipse, JRExporterGridCell gridCell) throws IOException;


	/**
	 *
	 */
	public void exportText(TableBuilder tableBuilder, JRPrintText text, JRExporterGridCell gridCell) throws IOException
	{
		tableBuilder.buildCellHeader(styleCache.getCellStyle(gridCell), gridCell.getColSpan(), gridCell.getRowSpan());

		JRStyledText styledText = getStyledText(text);

		int textLength = 0;

		if (styledText != null)
		{
			textLength = styledText.length();
		}

//		if (isWrapBreakWord)
//		{
//			styleBuffer.append("width: " + gridCell.width + "; ");
//			styleBuffer.append("word-wrap: break-word; ");
//		}

//		if (text.getLineSpacing() != JRTextElement.LINE_SPACING_SINGLE)
//		{
//			styleBuffer.append("line-height: " + text.getLineSpacingFactor() + "; ");
//		}

//		if (styleBuffer.length() > 0)
//		{
//			writer.write(" style=\"");
//			writer.write(styleBuffer.toString());
//			writer.write("\"");
//		}
//
//		writer.write(">");
		tempBodyWriter.write("<text:p text:style-name=\"");
		tempBodyWriter.write(styleCache.getParagraphStyle(text));
		tempBodyWriter.write("\">");
		insertPageAnchor();
		if (text.getAnchorName() != null)
		{
			exportAnchor(JRStringUtil.xmlEncode(text.getAnchorName()));
		}

		boolean startedHyperlink = startHyperlink(text, true);

		if (textLength > 0)
		{
			exportStyledText(styledText, getTextLocale(text));
		}

		if (startedHyperlink)
		{
			endHyperlink(true);
		}

		tempBodyWriter.write("</text:p>\n");

		tableBuilder.buildCellFooter();
	}


	/**
	 *
	 */
	protected void exportStyledText(JRStyledText styledText, Locale locale) throws IOException
	{
		String text = styledText.getText();

		int runLimit = 0;

		AttributedCharacterIterator iterator = styledText.getAttributedString().getIterator();

		while(runLimit < styledText.length() && (runLimit = iterator.getRunLimit()) <= styledText.length())
		{
			exportStyledTextRun(
				iterator.getAttributes(), 
				text.substring(iterator.getIndex(), runLimit),
				locale
				);

			iterator.setIndex(runLimit);
		}
	}


	/**
	 *
	 */
	protected void exportStyledTextRun(Map attributes, String text, Locale locale) throws IOException
	{
		String textSpanStyleName = styleCache.getTextSpanStyle(attributes, text, locale);

		tempBodyWriter.write("<text:span");
		tempBodyWriter.write(" text:style-name=\"" + textSpanStyleName + "\"");
		tempBodyWriter.write(">");

		if (text != null)
		{
			tempBodyWriter.write(Utility.replaceNewLineWithLineBreak(JRStringUtil.xmlEncode(text)));//FIXMEODT try something nicer for replace
		}

		tempBodyWriter.write("</text:span>");
	}

	/**
	 *
	 */
	protected abstract void exportImage(TableBuilder tableBuilder, JRPrintImage image, JRExporterGridCell gridCell) throws JRException, IOException;


	/**
	 *
	 */
	protected String getImagePath(JRRenderable renderer, boolean isLazy, JRExporterGridCell gridCell)
	{
		String imagePath = null;

		if (renderer != null)
		{
			if (renderer.getType() == JRRenderable.TYPE_IMAGE && rendererToImagePathMap.containsKey(renderer.getId()))
			{
				imagePath = (String)rendererToImagePathMap.get(renderer.getId());
			}
			else
			{
				if (isLazy)
				{
					imagePath = ((JRImageRenderer)renderer).getImageLocation();
				}
				else
				{
					JRPrintElementIndex imageIndex = getElementIndex(gridCell);
					imagesToProcess.add(imageIndex);

					String imageName = getImageName(imageIndex);
					imagePath = "Pictures/" + imageName;
				}

				rendererToImagePathMap.put(renderer.getId(), imagePath);
			}
		}

		return imagePath;
	}


	protected JRPrintElementIndex getElementIndex(JRExporterGridCell gridCell)
	{
		JRPrintElementIndex imageIndex =
			new JRPrintElementIndex(
					reportIndex,
					pageIndex,
					gridCell.getWrapper().getAddress()
					);
		return imageIndex;
	}


	/**
	 *
	 *
	protected void writeImageMap(String imageMapName, JRPrintHyperlink mainHyperlink, List imageMapAreas) throws IOException
	{
		writer.write("<map name=\"" + imageMapName + "\">\n");

		for (Iterator it = imageMapAreas.iterator(); it.hasNext();)
		{
			JRPrintImageAreaHyperlink areaHyperlink = (JRPrintImageAreaHyperlink) it.next();
			JRPrintImageArea area = areaHyperlink.getArea();

			writer.write("  <area shape=\"" + JRPrintImageArea.getHtmlShape(area.getShape()) + "\"");
			writeImageAreaCoordinates(area);
			writeImageAreaHyperlink(areaHyperlink.getHyperlink());
			writer.write("/>\n");
		}

		if (mainHyperlink.getHyperlinkTypeValue() != NONE)
		{
			writer.write("  <area shape=\"default\"");
			writeImageAreaHyperlink(mainHyperlink);
			writer.write("/>\n");
		}

		writer.write("</map>\n");
	}


	protected void writeImageAreaCoordinates(JRPrintImageArea area) throws IOException
	{
		int[] coords = area.getCoordinates();
		if (coords != null && coords.length > 0)
		{
			StringBuffer coordsEnum = new StringBuffer(coords.length * 4);
			coordsEnum.append(coords[0]);
			for (int i = 1; i < coords.length; i++)
			{
				coordsEnum.append(',');
				coordsEnum.append(coords[i]);
			}

			writer.write(" coords=\"" + coordsEnum + "\"");
		}
	}


	protected void writeImageAreaHyperlink(JRPrintHyperlink hyperlink) throws IOException
	{
		String href = getHyperlinkURL(hyperlink);
		if (href == null)
		{
			writer.write(" nohref=\"nohref\"");
		}
		else
		{
			writer.write(" href=\"" + href + "\"");

			String target = getHyperlinkTarget(hyperlink);
			if (target != null)
			{
				writer.write(" target=\"");
				writer.write(target);
				writer.write("\"");
			}
		}

		if (hyperlink.getHyperlinkTooltip() != null)
		{
			writer.write(" title=\"");
			writer.write(JRStringUtil.xmlEncode(hyperlink.getHyperlinkTooltip()));
			writer.write("\"");
		}
	}


	/**
	 *
	 */
	public static String getImageName(JRPrintElementIndex printElementIndex)
	{
		return IMAGE_NAME_PREFIX + printElementIndex.toString();
	}


	/**
	 *
	 */
	public static JRPrintElementIndex getPrintElementIndex(String imageName)
	{
		if (!imageName.startsWith(IMAGE_NAME_PREFIX))
		{
			throw new JRRuntimeException("Invalid image name: " + imageName);
		}

		return JRPrintElementIndex.parsePrintElementIndex(imageName.substring(IMAGE_NAME_PREFIX_LEGTH));
	}


	/**
	 *
	 */
	protected void exportFrame(TableBuilder tableBuilder, JRPrintFrame frame, JRExporterGridCell gridCell) throws IOException, JRException
	{
		tableBuilder.buildCellHeader(styleCache.getCellStyle(gridCell), gridCell.getColSpan(), gridCell.getRowSpan());

		boolean appendBackcolor =
			frame.getModeValue() == ModeEnum.OPAQUE
			&& (backcolor == null || frame.getBackcolor().getRGB() != backcolor.getRGB());

		if (appendBackcolor)
		{
			setBackcolor(frame.getBackcolor());
		}

		try
		{
			JRGridLayout layout = gridCell.getLayout();
			JRPrintElementIndex frameIndex =
				new JRPrintElementIndex(
						reportIndex,
						pageIndex,
						gridCell.getWrapper().getAddress()
						);
			exportGrid(layout, frameIndex);
		}
		finally
		{
			if (appendBackcolor)
			{
				restoreBackcolor();
			}
		}

		tableBuilder.buildCellFooter();
	}


	/**
	 *
	 */
	protected abstract void exportGenericElement(TableBuilder tableBuilder, JRGenericPrintElement element, JRExporterGridCell gridCell) throws IOException, JRException;


	/**
	 *
	 */
	protected void setBackcolor(Color color)
	{
		backcolorStack.addLast(backcolor);

		backcolor = color;
	}


	protected void restoreBackcolor()
	{
		backcolor = (Color) backcolorStack.removeLast();
	}


	protected float getXAlignFactor(JRPrintImage image)
	{
		float xalignFactor = 0f;
		switch (image.getHorizontalAlignmentValue())
		{
			case RIGHT :
			{
				xalignFactor = 1f;
				break;
			}
			case CENTER :
			{
				xalignFactor = 0.5f;
				break;
			}
			case LEFT :
			default :
			{
				xalignFactor = 0f;
				break;
			}
		}
		return xalignFactor;
	}


	protected float getYAlignFactor(JRPrintImage image)
	{
		float yalignFactor = 0f;
		switch (image.getVerticalAlignmentValue())
		{
			case BOTTOM :
			{
				yalignFactor = 1f;
				break;
			}
			case MIDDLE :
			{
				yalignFactor = 0.5f;
				break;
			}
			case TOP :
			default :
			{
				yalignFactor = 0f;
				break;
			}
		}
		return yalignFactor;
	}

	protected boolean startHyperlink(JRPrintHyperlink link, boolean isText) throws IOException
	{
		String href = getHyperlinkURL(link);

		if (href != null)
		{
			if(isText)
			{
				tempBodyWriter.write("<text:a xlink:href=\"");
			}
			else
			{
				tempBodyWriter.write("<draw:a xlink:type=\"simple\" xlink:href=\"");
			}
			tempBodyWriter.write(JRStringUtil.xmlEncode(href));
			tempBodyWriter.write("\"");


			String target = getHyperlinkTarget(link);//FIXMETARGET
			if (target != null)
			{
				tempBodyWriter.write(" office:target-frame-name=\"");
				tempBodyWriter.write(target);
				tempBodyWriter.write("\"");
				if(target.equals("_blank"))
				{
					tempBodyWriter.write(" xlink:show=\"new\"");
				}
			}
/*
 * tooltips are unavailable for the moment
 *
			if (link.getHyperlinkTooltip() != null)
			{
				tempBodyWriter.write(" xlink:title=\"");
				tempBodyWriter.write(JRStringUtil.xmlEncode(link.getHyperlinkTooltip()));
				tempBodyWriter.write("\"");
			}
*/
			tempBodyWriter.write(">");
		}

		return href != null;
	}


	protected String getHyperlinkTarget(JRPrintHyperlink link)
	{
		String target = null;
		switch(link.getHyperlinkTargetValue())
		{
			case SELF :
			{
				target = "_self";
				break;
			}
			case BLANK :
			default :
			{
				target = "_blank";
				break;
			}
		}
		return target;
	}


	protected String getHyperlinkURL(JRPrintHyperlink link)
	{
		String href = null;
		JRHyperlinkProducer customHandler = getCustomHandler(link);
		if (customHandler == null)
		{
			switch(link.getHyperlinkTypeValue())
			{
				case REFERENCE :
				{
					if (link.getHyperlinkReference() != null)
					{
						href = link.getHyperlinkReference();
					}
					break;
				}
				case LOCAL_ANCHOR :
				{
					if (link.getHyperlinkAnchor() != null)
					{
						href = "#" + link.getHyperlinkAnchor();
					}
					break;
				}
				case LOCAL_PAGE :
				{
					if (link.getHyperlinkPage() != null)
					{
						href = "#" + JR_PAGE_ANCHOR_PREFIX + reportIndex + "_" + link.getHyperlinkPage().toString();
					}
					break;
				}
				case REMOTE_ANCHOR :
				{
					if (
						link.getHyperlinkReference() != null &&
						link.getHyperlinkAnchor() != null
						)
					{
						href = link.getHyperlinkReference() + "#" + link.getHyperlinkAnchor();
					}
					break;
				}
				case REMOTE_PAGE :
				{
					if (
						link.getHyperlinkReference() != null &&
						link.getHyperlinkPage() != null
						)
					{
						href = link.getHyperlinkReference() + "#" + JR_PAGE_ANCHOR_PREFIX + "0_" + link.getHyperlinkPage().toString();
					}
					break;
				}
				case NONE :
				default :
				{
					break;
				}
			}
		}
		else
		{
			href = customHandler.getHyperlink(link);
		}

		return href;
	}


	protected void endHyperlink(boolean isText) throws IOException
	{
		if(isText)
		{
			tempBodyWriter.write("</text:a>");
		}
		else
		{
			tempBodyWriter.write("</draw:a>");
		}
	}

	protected void insertPageAnchor() throws IOException
	{
		if(startPage)
		{
			exportAnchor(JR_PAGE_ANCHOR_PREFIX + reportIndex + "_" + (pageIndex + 1));
			startPage = false;
		}
	}
	
	protected abstract void exportAnchor(String anchorName) throws IOException;

	protected abstract ExporterNature getExporterNature(ExporterFilter filter);

	protected abstract String getExporterPropertiesPrefix();

}

