| /******************************************************************************* |
| * Copyright (c) 2000, 2008 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.swt.dnd; |
| |
| import org.eclipse.swt.internal.wpf.*; |
| |
| /** |
| * The class <code>FileTransfer</code> provides a platform specific mechanism |
| * for converting a list of files represented as a java <code>String[]</code> to a |
| * platform specific representation of the data and vice versa. |
| * Each <code>String</code> in the array contains the absolute path for a single |
| * file or directory. |
| * |
| * <p>An example of a java <code>String[]</code> containing a list of files is shown |
| * below:</p> |
| * |
| * <code><pre> |
| * File file1 = new File("C:\temp\file1"); |
| * File file2 = new File("C:\temp\file2"); |
| * String[] fileData = new String[2]; |
| * fileData[0] = file1.getAbsolutePath(); |
| * fileData[1] = file2.getAbsolutePath(); |
| * </code></pre> |
| * |
| * @see Transfer |
| */ |
| public class FileTransfer extends ByteArrayTransfer { |
| |
| private static FileTransfer _instance = new FileTransfer(); |
| private static int TYPEID = getTypeId(); |
| |
| /** |
| * Returns the singleton instance of the FileTransfer class. |
| * |
| * @return the singleton instance of the FileTransfer class |
| */ |
| public static FileTransfer getInstance () { |
| return _instance; |
| } |
| |
| static int getTypeId() { |
| int format = OS.DataFormats_FileDrop(); |
| String name = createJavaString(format); |
| OS.GCHandle_Free(format); |
| return registerType(name); |
| } |
| |
| private FileTransfer() {} |
| |
| boolean checkFile(Object object) { |
| if (object == null || !(object instanceof String[]) || ((String[])object).length == 0) return false; |
| String[] strings = (String[])object; |
| for (int i = 0; i < strings.length; i++) { |
| if (strings[i] == null || strings[i].length() == 0) return false; |
| } |
| return true; |
| } |
| |
| protected int[] getTypeIds(){ |
| return new int[]{TYPEID}; |
| } |
| |
| /** |
| * This implementation of <code>javaToNative</code> converts a list of file names |
| * represented by a java <code>String[]</code> to a platform specific representation. |
| * Each <code>String</code> in the array contains the absolute path for a single |
| * file or directory. |
| * |
| * @param object a java <code>String[]</code> containing the file names to be converted |
| * @param transferData an empty <code>TransferData</code> object that will |
| * be filled in on return with the platform specific format of the data |
| * |
| * @see Transfer#nativeToJava |
| */ |
| public void javaToNative(Object object, TransferData transferData) { |
| if (!checkFile(object) || !isSupportedType(transferData)) { |
| DND.error(DND.ERROR_INVALID_DATA); |
| } |
| String[] fileNames = (String[]) object; |
| int length = fileNames.length; |
| int pStringId = OS.String_typeid(); |
| int pStringArray = OS.Array_CreateInstance(pStringId, length); |
| for (int i = 0; i < length; i++) { |
| int pString = createDotNetString(fileNames[i]); |
| OS.Array_SetValue(pStringArray, pString, i); |
| OS.GCHandle_Free(pString); |
| } |
| transferData.pValue = pStringArray; |
| OS.GCHandle_Free(pStringId); |
| } |
| |
| /** |
| * This implementation of <code>nativeToJava</code> converts a platform specific |
| * representation of a list of file names to a java <code>String[]</code>. |
| * Each String in the array contains the absolute path for a single file or directory. |
| * |
| * @param transferData the platform specific representation of the data to be converted |
| * @return a java <code>String[]</code> containing a list of file names if the conversion |
| * was successful; otherwise null |
| * |
| * @see Transfer#javaToNative |
| */ |
| |
| public Object nativeToJava(TransferData transferData) { |
| if (!isSupportedType(transferData) || transferData.pValue == 0) return null; |
| |
| int pStringArray = transferData.pValue; |
| int length = OS.Array_GetLength(pStringArray, 0); |
| String[] fileNames = new String [length]; |
| for (int i = 0; i < length; i++) { |
| int pString = OS.Array_GetValue(pStringArray, i); |
| fileNames[i] = createJavaString(pString); |
| OS.GCHandle_Free(pString); |
| } |
| return fileNames; |
| } |
| } |