/*
* 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/>.
*/
package net.sf.jasperreports.engine.util;
import java.awt.font.TextAttribute;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import javax.swing.JEditorPane;
import javax.swing.text.AbstractDocument;
import javax.swing.text.AttributeSet;
import javax.swing.text.BadLocationException;
import javax.swing.text.Document;
import javax.swing.text.Element;
import javax.swing.text.StyleConstants;
import javax.swing.text.AbstractDocument.LeafElement;
import javax.swing.text.html.HTML;
import javax.swing.text.html.HTML.Tag;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
/**
* @author Teodor Danciu (teodord@users.sourceforge.net)
* @version $Id: JEditorPaneHtmlMarkupProcessor.java 3708 2010-04-07 14:52:09Z lucianc $
*/
public class JEditorPaneHtmlMarkupProcessor extends JEditorPaneMarkupProcessor
{
private static final Log log = LogFactory.getLog(JEditorPaneHtmlMarkupProcessor.class);
private static JEditorPaneHtmlMarkupProcessor instance = null;
/**
*
*/
public static JEditorPaneHtmlMarkupProcessor getInstance()
{
if (instance == null)
{
instance = new JEditorPaneHtmlMarkupProcessor();
}
return instance;
}
/**
*
*/
public String convert(String srcText)
{
JEditorPane editorPane = new JEditorPane("text/html", srcText);
editorPane.setEditable(false);
List elements = new ArrayList();
Document document = editorPane.getDocument();
Element root = document.getDefaultRootElement();
if (root != null)
{
addElements(elements, root);
}
int startOffset = 0;
int endOffset = 0;
int crtOffset = 0;
String chunk = null;
Element element = null;
Element parent = null;
boolean bodyOccurred = false;
int[] orderedListIndex = new int[elements.size()];
String whitespace = " ";
String[] whitespaces = new String[elements.size()];
for(int i = 0; i < elements.size(); i++)
{
whitespaces[i] = "";
}
JRStyledText styledText = new JRStyledText();
for(int i = 0; i < elements.size(); i++)
{
if (bodyOccurred && chunk != null)
{
styledText.append(chunk);
Map styleAttributes = getAttributes(element.getAttributes());
if (!styleAttributes.isEmpty())
{
styledText.addRun(new JRStyledText.Run(styleAttributes,
startOffset + crtOffset, endOffset + crtOffset));
}
}
chunk = null;
element = (Element)elements.get(i);
parent = element.getParentElement();
startOffset = element.getStartOffset();
endOffset = element.getEndOffset();
AttributeSet attrs = element.getAttributes();
Object elementName = attrs.getAttribute(AbstractDocument.ElementNameAttribute);
Object object = (elementName != null) ? null : attrs.getAttribute(StyleConstants.NameAttribute);
if (object instanceof HTML.Tag)
{
HTML.Tag htmlTag = (HTML.Tag) object;
if(htmlTag == Tag.BODY)
{
bodyOccurred = true;
crtOffset = - startOffset;
}
else if(htmlTag == Tag.BR)
{
chunk = "\n";
}
else if(htmlTag == Tag.OL)
{
orderedListIndex[i] = 0;
String parentName = parent.getName().toLowerCase();
whitespaces[i] = whitespaces[elements.indexOf(parent)] + whitespace;
if(parentName.equals("li"))
{
chunk = "";
}
else
{
chunk = "\n";
++crtOffset;
}
}
else if(htmlTag == Tag.UL)
{
whitespaces[i] = whitespaces[elements.indexOf(parent)] + whitespace;
String parentName = parent.getName().toLowerCase();
if(parentName.equals("li"))
{
chunk = "";
}
else
{
chunk = "\n";
++crtOffset;
}
}
else if(htmlTag == Tag.LI)
{
whitespaces[i] = whitespaces[elements.indexOf(parent)];
if(element.getElement(0) != null &&
(element.getElement(0).getName().toLowerCase().equals("ol") || element.getElement(0).getName().toLowerCase().equals("ul"))
)
{
chunk = "";
}
else if(parent.getName().equals("ol"))
{
int index = elements.indexOf(parent);
chunk = whitespaces[index] + String.valueOf(++orderedListIndex[index]) + ". ";
}
else
{
chunk = whitespaces[elements.indexOf(parent)] + "\u2022 ";
}
crtOffset += chunk.length();
}
else if (element instanceof LeafElement)
{
try
{
chunk = document.getText(startOffset, endOffset - startOffset);
}
catch(BadLocationException e)
{
if (log.isDebugEnabled())
{
log.debug("Error converting markup.", e);
}
}
}
}
}
if (chunk != null && !"\n".equals(chunk))
{
styledText.append(chunk);
Map styleAttributes = getAttributes(element.getAttributes());
if (!styleAttributes.isEmpty())
{
styledText.addRun(new JRStyledText.Run(styleAttributes,
startOffset + crtOffset, endOffset + crtOffset));
}
}
styledText.setGlobalAttributes(new HashMap());
return JRStyledTextParser.getInstance().write(styledText);
}
/**
*
*/
protected void addElements(List elements, Element element)
{
//if(element instanceof LeafElement)
{
elements.add(element);
}
for(int i = 0; i < element.getElementCount(); i++)
{
Element child = element.getElement(i);
addElements(elements, child);
}
}
/**
*
*/
protected Map getAttributes(AttributeSet attrSet)
{
Map attrMap = new HashMap();
if (attrSet.isDefined(StyleConstants.FontFamily))
{
attrMap.put(
TextAttribute.FAMILY,
StyleConstants.getFontFamily(attrSet)
);
}
if (attrSet.isDefined(StyleConstants.Bold))
{
attrMap.put(
TextAttribute.WEIGHT,
StyleConstants.isBold(attrSet) ? TextAttribute.WEIGHT_BOLD : TextAttribute.WEIGHT_REGULAR
);
}
if (attrSet.isDefined(StyleConstants.Italic))
{
attrMap.put(
TextAttribute.POSTURE,
StyleConstants.isItalic(attrSet) ? TextAttribute.POSTURE_OBLIQUE : TextAttribute.POSTURE_REGULAR
);
}
if (attrSet.isDefined(StyleConstants.Underline))
{
attrMap.put(
TextAttribute.UNDERLINE,
StyleConstants.isUnderline(attrSet) ? TextAttribute.UNDERLINE_ON : null
);
}
if (attrSet.isDefined(StyleConstants.StrikeThrough))
{
attrMap.put(
TextAttribute.STRIKETHROUGH,
StyleConstants.isStrikeThrough(attrSet) ? TextAttribute.STRIKETHROUGH_ON : null
);
}
if (attrSet.isDefined(StyleConstants.FontSize))
{
attrMap.put(
TextAttribute.SIZE,
new Float(StyleConstants.getFontSize(attrSet))
);
}
if (attrSet.isDefined(StyleConstants.Foreground))
{
attrMap.put(
TextAttribute.FOREGROUND,
StyleConstants.getForeground(attrSet)
);
}
if (attrSet.isDefined(StyleConstants.Background))
{
attrMap.put(
TextAttribute.BACKGROUND,
StyleConstants.getBackground(attrSet)
);
}
//FIXME: why StyleConstants.isSuperscript(attrSet) does return false
if (attrSet.isDefined(StyleConstants.Superscript) && !StyleConstants.isSubscript(attrSet))
{
attrMap.put(
TextAttribute.SUPERSCRIPT,
TextAttribute.SUPERSCRIPT_SUPER
);
}
if (attrSet.isDefined(StyleConstants.Subscript) && StyleConstants.isSubscript(attrSet))
{
attrMap.put(
TextAttribute.SUPERSCRIPT,
TextAttribute.SUPERSCRIPT_SUB
);
}
return attrMap;
}
}