/*
* Copyright (c) 2007 BUSINESS OBJECTS SOFTWARE LIMITED
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* * Neither the name of Business Objects nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/*
* HtmlTransferable.java
* Created: May 31, 2004
* By: Iulian Radu
*/
package org.openquark.util.html;
import java.awt.datatransfer.DataFlavor;
import java.awt.datatransfer.Transferable;
import java.awt.datatransfer.UnsupportedFlavorException;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.StringReader;
import javax.swing.JEditorPane;
import javax.swing.text.Document;
import javax.swing.text.EditorKit;
import javax.swing.text.html.HTMLEditorKit;
import javax.swing.text.rtf.RTFEditorKit;
import org.openquark.util.TextEncodingUtilities;
/**
* Transferable for HTML text.
* This provides HTML, RTF, and plaintext flavors of the text.
*
* @author Iulian Radu
*/
public class HtmlTransferable implements Transferable {
/** HTML data flavor */
public static final DataFlavor htmlFlavor = new DataFlavor("text/html; class=java.io.InputStream", "HTML Text");
/** RTF data flavor */
public static final DataFlavor rtfFlavor = new DataFlavor("text/rtf; class=java.io.InputStream", "RTF Text");
/** Flavors supported: HTML, RTF, String*/
private static final DataFlavor[] flavors = new DataFlavor[] {
htmlFlavor,
rtfFlavor,
DataFlavor.stringFlavor
};
// String data in the various formats
private final String htmlString;
private final String rtfString;
private final String plainString;
/**
* Constructor
*
* @param htmlString html string to hold
*/
public HtmlTransferable(String htmlString) {
this.htmlString = htmlString;
// Build an HTML document from the string
HTMLEditorKit htmlKit = new HTMLEditorKit();
Document doc = htmlKit.createDefaultDocument();
try {
htmlKit.read(new StringReader(htmlString), doc, 0);
} catch (Exception e) {
throw new IllegalStateException("HtmlTransferable: Error encountered in string conversion: " + e);
}
// Get the RTF version of the string
RTFEditorKit rtfKit = new RTFEditorKit();
ByteArrayOutputStream byteStream = new ByteArrayOutputStream();
try {
rtfKit.write(byteStream, doc, 0, doc.getLength());
} catch (Exception e) {
throw new IllegalStateException("HtmlTransferable: Error encountered in string conversion: " + e);
}
this.rtfString = new String(byteStream.toByteArray());
// Get the plaintext version of the string
JEditorPane conversionPanel = new JEditorPane();
EditorKit plainKit = conversionPanel.getEditorKit();
try {
byteStream.reset();
plainKit.write(byteStream, doc, 0, doc.getLength());
byteStream.close();
} catch (Exception e) {
throw new IllegalStateException("HtmlTransferable: Error encountered in string conversion: " + e);
}
this.plainString = new String(byteStream.toByteArray());
}
/**
* @see java.awt.datatransfer.Transferable#getTransferDataFlavors()
*/
public DataFlavor[] getTransferDataFlavors() {
return flavors.clone();
}
/**
* @see java.awt.datatransfer.Transferable#getTransferData(java.awt.datatransfer.DataFlavor)
*/
public boolean isDataFlavorSupported(DataFlavor flavor) {
for (final DataFlavor element : flavors) {
if (flavor.equals(element)) {
return true;
}
}
return false;
}
/**
* @see java.awt.datatransfer.Transferable#getTransferData(java.awt.datatransfer.DataFlavor)
*/
public Object getTransferData(DataFlavor flavor) throws UnsupportedFlavorException, IOException {
if (flavor.isMimeTypeEqual(flavors[0])) {
return new ByteArrayInputStream(TextEncodingUtilities.getUTF8Bytes(htmlString));
} else if (flavor.isMimeTypeEqual(flavors[1])) {
return new ByteArrayInputStream(TextEncodingUtilities.getUTF8Bytes(rtfString));
} else if (flavor.isMimeTypeEqual(flavors[2])) {
return plainString;
} else {
throw new UnsupportedFlavorException(flavor);
}
}
}