bundles/org.eclipse.swt/Eclipse SWT Drag and Drop/win32/org/eclipse/swt/dnd/RTFTransfer.java

package org.eclipse.swt.dnd;

/*
 * (c) Copyright IBM Corp. 2000, 2001.
 * All Rights Reserved
 */
 
/**
 * The <code>RTFTransfer</code> class is used to transfer text with the RTF format
 * in a drag and drop operation.
 */
public class RTFTransfer extends ByteArrayTransfer {

	private static final String CF_RTF_NAME = "Rich Text Format";
	private static final int CF_RTF = registerType(CF_RTF_NAME);
	private static RTFTransfer _instance = new RTFTransfer();

private RTFTransfer() {}
/**
 * Returns the singleton instance of the RTFTransfer class.
 *
 * @return the singleton instance of the RTFTransfer class
 */
public static RTFTransfer getInstance () {
	return _instance;
}
/**
 * Converts a RTF-formatted Java String to a platform specific representation. 
 * <p>
 * On a successful conversion, the transferData.result field will be set as follows:
 * <ul>
 * <li>Windows: OLE.S_OK
 * <li>Motif: 0
 * </ul>
 * If this transfer agent is unable to perform the conversion,
 * the transferData.result field will be set to a failure value as follows:
 * <ul>
 * <li>Windows: OLE.DV_E_TYMED
 * <li>Motif: 1
 * </ul></p>
 *
 * @param object a Java String containing the data to be transferred
 * @param transferData an empty TransferData object; this object will be filled in on return
 *        with the platform specific format of the data
 */
public void javaToNative (Object object, TransferData transferData){
	if (object == null || !(object instanceof String)) return;
		
	// CF_RTF is stored as a null terminated byte array
	// create a byte array from object
	String text = (String) object+'\0';
	// pass byte array on to super to convert to native
	super.javaToNative(text.getBytes(), transferData);
}
/**
 * Converts a platform specific representation of a string to a Java String.
 *
 * @param transferData the platform specific representation of the data that has been transferred
 * @return a Java String containing the transferred data if the conversion was successful;
 *         otherwise null
 */
public Object nativeToJava(TransferData transferData){
	// get byte array from super
	byte[] buffer = (byte[])super.nativeToJava(transferData);
	if (buffer == null) return null;
	// convert byte array to a string
	String string = new String(buffer);
	// remove null terminator
	int index = string.indexOf("\0");
	string = string.substring(0, index);
	return string;
}
protected int[] getTypeIds(){
	return new int[] {CF_RTF};
}
protected String[] getTypeNames(){
	return new String[] {"CF_RTF"};
}
}