1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
|
/*******************************************************************************
* Copyright (c) 2000, 2006 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
* Outhink - support for typeFileURL
*******************************************************************************/
package org.eclipse.swt.dnd;
import java.io.*;
import org.eclipse.swt.internal.carbon.*;
/**
* 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.
* See <code>Transfer</code> for additional information.
*
* <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 <a href="http://www.eclipse.org/swt/">Sample code and further information</a>
*/
public class FileTransfer extends ByteArrayTransfer {
static FileTransfer _instance = new FileTransfer();
static final String HFS = "hfs "; //$NON-NLS-1$
static final String FURL = "furl"; //$NON-NLS-1$
static final int HFSID = registerType(HFS);
static final int FURLID = registerType(FURL);
FileTransfer() {}
/**
* Returns the singleton instance of the FileTransfer class.
*
* @return the singleton instance of the FileTransfer class
*/
public static FileTransfer getInstance () {
return _instance;
}
/**
* 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. For additional information see
* <code>Transfer#javaToNative</code>.
*
* @param object a java <code>String[]</code> containing the file names to be
* converted
* @param transferData an empty <code>TransferData</code> 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 (!checkFile(object) || !isSupportedType(transferData)) {
DND.error(DND.ERROR_INVALID_DATA);
}
String[] files = (String[])object;
transferData.result = -1;
byte[][] data = new byte[files.length][];
for (int i = 0; i < data.length; i++) {
File file = new File(files[i]);
boolean isDirectory = file.isDirectory();
String fileName = files[i];
char [] chars = new char [fileName.length ()];
fileName.getChars (0, chars.length, chars, 0);
int cfstring = OS.CFStringCreateWithCharacters (OS.kCFAllocatorDefault, chars, chars.length);
if (cfstring == 0) return;
try {
int url = OS.CFURLCreateWithFileSystemPath(OS.kCFAllocatorDefault, cfstring, OS.kCFURLPOSIXPathStyle, isDirectory);
if (url == 0) return;
try {
if (transferData.type == HFSID) {
byte[] fsRef = new byte[80];
if (!OS.CFURLGetFSRef(url, fsRef)) return;
byte[] fsSpec = new byte[70];
if (OS.FSGetCatalogInfo(fsRef, 0, null, null, fsSpec, null) != OS.noErr) return;
byte[] hfsflavor = new byte[10 + fsSpec.length];
byte[] finfo = new byte[16];
OS.FSpGetFInfo(fsSpec, finfo);
System.arraycopy(finfo, 0, hfsflavor, 0, 10);
System.arraycopy(fsSpec, 0, hfsflavor, 10, fsSpec.length);
data[i] = hfsflavor;
}
if (transferData.type == FURLID) {
int encoding = OS.CFStringGetSystemEncoding();
int theData = OS.CFURLCreateData(OS.kCFAllocatorDefault, url, encoding, true);
if (theData == 0) return;
try {
int length = OS.CFDataGetLength(theData);
byte[] buffer = new byte[length];
CFRange range = new CFRange();
range.length = length;
OS.CFDataGetBytes(theData, range, buffer);
data[i] = buffer;
} finally {
OS.CFRelease(theData);
}
}
} finally {
OS.CFRelease(url);
}
} finally {
OS.CFRelease(cfstring);
}
}
transferData.data = data;
transferData.result = 0;
}
/**
* 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.
* For additional information see <code>Transfer#nativeToJava</code>.
*
* @param transferData the platform specific representation of the data to be
* been converted
* @return a java <code>String[]</code> containing a list of file names if the
* conversion was successful; otherwise null
*/
public Object nativeToJava(TransferData transferData) {
if (!isSupportedType(transferData) || transferData.data == null) return null;
if (transferData.data.length == 0) return null;
int count = transferData.data.length;
String[] fileNames = new String[count];
for (int i=0; i<count; i++) {
byte[] data = transferData.data[i];
int url = 0;
if (transferData.type == HFSID) {
byte[] fsspec = new byte[data.length - 10];
System.arraycopy(data, 10, fsspec, 0, fsspec.length);
byte[] fsRef = new byte[80];
if (OS.FSpMakeFSRef(fsspec, fsRef) != OS.noErr) return null;
url = OS.CFURLCreateFromFSRef(OS.kCFAllocatorDefault, fsRef);
if (url == 0) return null;
}
if (transferData.type == FURLID) {
int encoding = OS.kCFStringEncodingUTF8;
url = OS.CFURLCreateWithBytes(OS.kCFAllocatorDefault, data, data.length, encoding, 0);
if (url == 0) return null;
}
try {
int path = OS.CFURLCopyFileSystemPath(url, OS.kCFURLPOSIXPathStyle);
if (path == 0) return null;
try {
int length = OS.CFStringGetLength(path);
if (length == 0) return null;
char[] buffer= new char[length];
CFRange range = new CFRange();
range.length = length;
OS.CFStringGetCharacters(path, range, buffer);
fileNames[i] = new String(buffer);
} finally {
OS.CFRelease(path);
}
} finally {
OS.CFRelease(url);
}
}
return fileNames;
}
protected int[] getTypeIds(){
return new int[] {FURLID, HFSID};
}
protected String[] getTypeNames(){
return new String[] {FURL, HFS};
}
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 boolean validate(Object object) {
return checkFile(object);
}
}
|
