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"}; | |
} | |
} |