| package org.eclipse.swt.dnd;
|
|
|
| /*
|
| * (c) Copyright IBM Corp. 2000, 2001.
|
| * All Rights Reserved
|
| */
|
|
|
| /** |
| * The <code>FileTransfer</code> class is used to transfer files in a drag and drop operation. |
| */ |
| public class FileTransfer extends ByteArrayTransfer {
|
|
|
| private static FileTransfer _instance = new FileTransfer();
|
| private static final String TYPENAME = "text/uri-list\0";
|
| private static final int TYPEID = registerType(TYPENAME);
|
|
|
| private FileTransfer() {}
|
| /** |
| * Returns the singleton instance of the FileTransfer class. |
| * |
| * @return the singleton instance of the FileTransfer class |
| */ |
| public static FileTransfer getInstance () {
|
| return _instance;
|
| }
|
| /** |
| * Converts a list of filenames 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 list of file names |
| * @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;
|
|
|
| // build a byte array from data
|
| String[] files = (String[])object;
|
|
|
| // create a string separated by "new lines" to represent list of files
|
| String nativeFormat = "file:";
|
| for (int i = 0, length = files.length; i < length; i++){
|
| nativeFormat += files[i]+"\r";
|
| }
|
| nativeFormat += "\0";
|
| // pass byte array on to super to convert to native
|
| super.javaToNative(nativeFormat.getBytes(), transferData);
|
| }
|
| /** |
| * Converts a platform specific representation of a list of file names to a Java array of String. |
| * |
| * @param transferData the platform specific representation of the data that has been transferred |
| * @return a Java array of String containing a list of file names if the conversion was successful; |
| * otherwise null |
| */ |
| public Object nativeToJava(TransferData transferData) {
|
|
|
| byte[] data = (byte[])super.nativeToJava(transferData);
|
| if (data == null) return null;
|
| String string = new String(data);
|
| // parse data and convert string to array of files
|
| int start = string.indexOf("file:");
|
| if (start == -1) return null;
|
| start += 5;
|
| String[] fileNames = new String[0];
|
| while (start < string.length()) {
|
| int end = string.indexOf("\r", start);
|
| if (end == -1) end = string.length() - 1;
|
|
|
| String fileName = string.substring(start, end);
|
| String[] newFileNames = new String[fileNames.length + 1];
|
| System.arraycopy(fileNames, 0, newFileNames, 0, fileNames.length);
|
| newFileNames[fileNames.length] = fileName;
|
| fileNames = newFileNames;
|
|
|
| start = string.indexOf("file:", end);
|
| if (start == -1) break;
|
| start += 5;
|
| }
|
| return fileNames;
|
| }
|
| protected String[] getTypeNames(){
|
| return new String[]{TYPENAME};
|
| }
|
| protected int[] getTypeIds(){
|
| return new int[]{TYPEID};
|
| }
|
| }
|