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annotate dwt/dnd/FileTransfer.d @ 45:d8635bb48c7c

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Merge with SWT 3.5
author Jacob Carlborg <doob@me.com>
date Mon, 01 Dec 2008 17:07:00 +0100
parents 1a8b3cb347e0
children e655f9f35342
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1 /*******************************************************************************
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2 * Copyright (c) 2000, 2008 IBM Corporation and others.
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3 * All rights reserved. This program and the accompanying materials
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4 * are made available under the terms of the Eclipse Public License v1.0
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5 * which accompanies this distribution, and is available at
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6 * http://www.eclipse.org/legal/epl-v10.html
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7 *
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8 * Contributors:
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9 * IBM Corporation - initial API and implementation
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10 * Outhink - support for typeFileURL
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11 *******************************************************************************/
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12 module dwt.dnd.FileTransfer;
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14 import dwt.dwthelper.utils;
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15
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16 import dwt.internal.cocoa.NSArray;
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17 import dwt.internal.cocoa.NSMutableArray;
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18 import dwt.internal.cocoa.NSString;
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19 import dwt.internal.cocoa.OS;
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21 /**
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22 * The class <code>FileTransfer</code> provides a platform specific mechanism
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23 * for converting a list of files represented as a java <code>String[]</code> to a
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24 * platform specific representation of the data and vice versa.
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25 * Each <code>String</code> in the array contains the absolute path for a single
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26 * file or directory.
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27 *
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28 * <p>An example of a java <code>String[]</code> containing a list of files is shown
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29 * below:</p>
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30 *
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31 * <code><pre>
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32 * File file1 = new File("C:\temp\file1");
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33 * File file2 = new File("C:\temp\file2");
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34 * String[] fileData = new String[2];
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35 * fileData[0] = file1.getAbsolutePath();
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36 * fileData[1] = file2.getAbsolutePath();
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37 * </code></pre>
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38 *
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39 * @see Transfer
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40 */
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41 public class FileTransfer extends ByteArrayTransfer {
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42
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43 static FileTransfer _instance = new FileTransfer();
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44 static final String ID_NAME = OS.NSFilenamesPboardType.getString();
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45 static final int ID = registerType(ID_NAME);
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47 FileTransfer() {}
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48
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49 /**
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50 * Returns the singleton instance of the FileTransfer class.
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51 *
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52 * @return the singleton instance of the FileTransfer class
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53 */
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54 public static FileTransfer getInstance () {
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55 return _instance;
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56 }
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57
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58 /**
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59 * This implementation of <code>javaToNative</code> converts a list of file names
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60 * represented by a java <code>String[]</code> to a platform specific representation.
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61 * Each <code>String</code> in the array contains the absolute path for a single
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62 * file or directory.
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63 *
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64 * @param object a java <code>String[]</code> containing the file names to be converted
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65 * @param transferData an empty <code>TransferData</code> object that will
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66 * be filled in on return with the platform specific format of the data
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67 *
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68 * @see Transfer#nativeToJava
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69 */
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70 public void javaToNative(Object object, TransferData transferData) {
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71 if (!checkFile(object) || !isSupportedType(transferData)) {
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72 DND.error(DND.ERROR_INVALID_DATA);
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73 }
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74 String[] files = (String[])object;
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75 int length = files.length;
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76 NSMutableArray array = NSMutableArray.arrayWithCapacity(length);
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77 for (int i = 0; i < length; i++) {
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78 String fileName = files[i];
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79 NSString string = NSString.stringWith(fileName);
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80 array.addObject(string);
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81 }
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82 transferData.data = array;
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83 }
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84 /**
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85 * This implementation of <code>nativeToJava</code> converts a platform specific
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86 * representation of a list of file names to a java <code>String[]</code>.
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87 * Each String in the array contains the absolute path for a single file or directory.
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88 *
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89 * @param transferData the platform specific representation of the data to be converted
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90 * @return a java <code>String[]</code> containing a list of file names if the conversion
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91 * was successful; otherwise null
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92 *
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93 * @see Transfer#javaToNative
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94 */
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95 public Object nativeToJava(TransferData transferData) {
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96 if (!isSupportedType(transferData) || transferData.data is null) return null;
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97 NSArray array = (NSArray) transferData.data;
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98 if (array.count() is 0) return null;
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99 int count = (int)/*64*/array.count();
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100 String[] fileNames = new String[count];
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101 for (int i=0; i<count; i++) {
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102 NSString string = new NSString(array.objectAtIndex(i));
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103 fileNames[i] = string.getString();
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104 }
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105 return fileNames;
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106 }
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107
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108 protected int[] getTypeIds(){
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109 return new int[] {ID};
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110 }
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111
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112 protected String[] getTypeNames(){
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113 return new String[] {ID_NAME};
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114 }
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115
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116 bool checkFile(Object object) {
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117 if (object is null || !(object instanceof String[]) || ((String[])object).length is 0) return false;
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118 String[] strings = (String[])object;
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119 for (int i = 0; i < strings.length; i++) {
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120 if (strings[i] is null || strings[i].length() is 0) return false;
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121 }
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122 return true;
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123 }
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124
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125 protected bool validate(Object object) {
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126 return checkFile(object);
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127 }
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128 }