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comparison org.eclipse.swt.win32.win32.x86/src/org/eclipse/swt/dnd/FileTransfer.d @ 0:6dd524f61e62

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add dwt win and basic java stuff
author Frank Benoit <benoit@tionex.de>
date Mon, 02 Mar 2009 14:44:16 +0100
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-1:000000000000 0:6dd524f61e62
1 /*******************************************************************************
2 * Copyright (c) 2000, 2008 IBM Corporation and others.
3 * All rights reserved. This program and the accompanying materials
4 * are made available under the terms of the Eclipse Public License v1.0
5 * which accompanies this distribution, and is available at
6 * http://www.eclipse.org/legal/epl-v10.html
7 *
8 * Contributors:
9 * IBM Corporation - initial API and implementation
10 * Port to the D programming language:
11 * Frank Benoit <benoit@tionex.de>
12 *******************************************************************************/
13 module org.eclipse.swt.dnd.FileTransfer;
14
15 import org.eclipse.swt.internal.ole.win32.COM;
16 import org.eclipse.swt.internal.ole.win32.OBJIDL;
17 import org.eclipse.swt.internal.win32.OS;
18
19 import org.eclipse.swt.dnd.ByteArrayTransfer;
20 import org.eclipse.swt.dnd.TransferData;
21 import org.eclipse.swt.dnd.DND;
22
23 import java.lang.all;
24 static import tango.text.Text;
25 alias tango.text.Text.Text!(char) StringBuffer;
26
27 /**
28 * The class <code>FileTransfer</code> provides a platform specific mechanism
29 * for converting a list of files represented as a java <code>String[]</code> to a
30 * platform specific representation of the data and vice versa.
31 * Each <code>String</code> in the array contains the absolute path for a single
32 * file or directory.
33 *
34 * <p>An example of a java <code>String[]</code> containing a list of files is shown
35 * below:</p>
36 *
37 * <code><pre>
38 * File file1 = new File("C:\temp\file1");
39 * File file2 = new File("C:\temp\file2");
40 * String[] fileData = new String[2];
41 * fileData[0] = file1.getAbsolutePath();
42 * fileData[1] = file2.getAbsolutePath();
43 * </code></pre>
44 *
45 * @see Transfer
46 */
47 public class FileTransfer : ByteArrayTransfer {
48
49 private static FileTransfer _instance;
50 private static final String CF_HDROP = "CF_HDROP "; //$NON-NLS-1$
51 private static final int CF_HDROPID = COM.CF_HDROP;
52 private static final String CF_HDROP_SEPARATOR = "\0"; //$NON-NLS-1$
53
54 private this() {}
55
56 /**
57 * Returns the singleton instance of the FileTransfer class.
58 *
59 * @return the singleton instance of the FileTransfer class
60 */
61 public static FileTransfer getInstance () {
62 if( _instance is null ){
63 synchronized {
64 if( _instance is null ){
65 _instance = new FileTransfer();
66 }
67 }
68 }
69 return _instance;
70 }
71
72 /**
73 * This implementation of <code>javaToNative</code> converts a list of file names
74 * represented by a java <code>String[]</code> to a platform specific representation.
75 * Each <code>String</code> in the array contains the absolute path for a single
76 * file or directory.
77 *
78 * @param object a java <code>String[]</code> containing the file names to be converted
79 * @param transferData an empty <code>TransferData</code> object that will
80 * be filled in on return with the platform specific format of the data
81 *
82 * @see Transfer#nativeToJava
83 */
84 public void javaToNative(Object object, TransferData transferData) {
85 if (!checkFile(object) || !isSupportedType(transferData)) {
86 DND.error(DND.ERROR_INVALID_DATA);
87 }
88 String[] fileNames;
89 if( auto strs = cast(ArrayWrapperString2) object ){
90 fileNames = strs.array;
91 }
92 StringBuffer allFiles = new StringBuffer();
93 for (int i = 0; i < fileNames.length; i++) {
94 allFiles.append(fileNames[i]);
95 allFiles.append(CF_HDROP_SEPARATOR); // each name is null terminated
96 }
97 TCHAR[] buffer = StrToTCHARs(0, allFiles.toString(), true); // there is an extra null terminator at the very end
98 DROPFILES dropfiles;
99 dropfiles.pFiles = DROPFILES.sizeof;
100 dropfiles.pt.x = dropfiles.pt.y = 0;
101 dropfiles.fNC = 0;
102 dropfiles.fWide = OS.IsUnicode ? 1 : 0;
103 // Allocate the memory because the caller (DropTarget) has not handed it in
104 // The caller of this method must release the data when it is done with it.
105 int byteCount = buffer.length * TCHAR.sizeof;
106 auto newPtr = OS.GlobalAlloc(COM.GMEM_FIXED | COM.GMEM_ZEROINIT, DROPFILES.sizeof + byteCount);
107 OS.MoveMemory(newPtr, &dropfiles, DROPFILES.sizeof);
108 OS.MoveMemory(newPtr + DROPFILES.sizeof, buffer.ptr, byteCount);
109 transferData.stgmedium = new STGMEDIUM();
110 transferData.stgmedium.tymed = COM.TYMED_HGLOBAL;
111 transferData.stgmedium.unionField = newPtr;
112 transferData.stgmedium.pUnkForRelease = null;
113 transferData.result = COM.S_OK;
114 }
115
116 /**
117 * This implementation of <code>nativeToJava</code> converts a platform specific
118 * representation of a list of file names to a java <code>String[]</code>.
119 * Each String in the array contains the absolute path for a single file or directory.
120 *
121 * @param transferData the platform specific representation of the data to be converted
122 * @return a java <code>String[]</code> containing a list of file names if the conversion
123 * was successful; otherwise null
124 *
125 * @see Transfer#javaToNative
126 */
127 public Object nativeToJava(TransferData transferData) {
128 if (!isSupportedType(transferData) || transferData.pIDataObject is null) return null;
129
130 // get file names from IDataObject
131 IDataObject dataObject = transferData.pIDataObject;
132 dataObject.AddRef();
133 FORMATETC* formatetc = new FORMATETC();
134 formatetc.cfFormat = COM.CF_HDROP;
135 formatetc.ptd = null;
136 formatetc.dwAspect = COM.DVASPECT_CONTENT;
137 formatetc.lindex = -1;
138 formatetc.tymed = COM.TYMED_HGLOBAL;
139 STGMEDIUM* stgmedium = new STGMEDIUM();
140 stgmedium.tymed = COM.TYMED_HGLOBAL;
141 transferData.result = getData(dataObject, formatetc, stgmedium);
142 dataObject.Release();
143 if (transferData.result !is COM.S_OK) return null;
144 // How many files are there?
145 int count = OS.DragQueryFile(stgmedium.unionField, 0xFFFFFFFF, null, 0);
146 String[] fileNames = new String[](count);
147 for (int i = 0; i < count; i++) {
148 // How long is the name ?
149 int size = OS.DragQueryFile(stgmedium.unionField, i, null, 0) + 1;
150 TCHAR[] lpszFile = NewTCHARs(0, size);
151 // Get file name and append it to string
152 OS.DragQueryFile(stgmedium.unionField, i, lpszFile.ptr, size);
153 fileNames[i] = TCHARzToStr(lpszFile.ptr);
154 }
155 OS.DragFinish(stgmedium.unionField); // frees data associated with HDROP data
156 return new ArrayWrapperString2(fileNames);
157 }
158
159 protected int[] getTypeIds(){
160 return [CF_HDROPID];
161 }
162
163 protected String[] getTypeNames(){
164 return [CF_HDROP];
165 }
166 bool checkFile(Object object) {
167 String[] strings;
168 if( auto strs = cast(ArrayWrapperString2)object ){
169 strings = strs.array;
170 }
171 if (!strings) return false;
172 for (int i = 0; i < strings.length; i++) {
173 if (strings[i] is null || strings[i].length is 0) return false;
174 }
175 return true;
176 }
177
178 protected bool validate(Object object) {
179 return checkFile(object);
180 }
181 }