Mercurial > projects > dwt-win
annotate dwt/dnd/FileTransfer.d @ 212:ab60f3309436
reverted the char[] to String and use the an alias.
author | Frank Benoit <benoit@tionex.de> |
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date | Mon, 05 May 2008 00:12:38 +0200 |
parents | b479f7e2f431 |
children | fd9c62a2998e |
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1 /******************************************************************************* |
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2 * Copyright (c) 2000, 2006 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 * Port to the D programming language: |
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11 * Frank Benoit <benoit@tionex.de> |
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12 *******************************************************************************/ |
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13 module dwt.dnd.FileTransfer; |
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14 |
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15 import dwt.internal.ole.win32.COM; |
138 | 16 import dwt.internal.ole.win32.OBJIDL; |
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17 import dwt.internal.win32.OS; |
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18 |
138 | 19 import dwt.dnd.ByteArrayTransfer; |
20 import dwt.dnd.TransferData; | |
21 import dwt.dnd.DND; | |
22 | |
23 import dwt.dwthelper.utils; | |
24 static import tango.text.Text; | |
25 alias tango.text.Text.Text!(char) StringBuffer; | |
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26 |
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27 /** |
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28 * The class <code>FileTransfer</code> provides a platform specific mechanism |
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29 * for converting a list of files represented as a java <code>String[]</code> to a |
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30 * platform specific representation of the data and vice versa. |
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31 * Each <code>String</code> in the array contains the absolute path for a single |
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32 * file or directory. |
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33 * See <code>Transfer</code> for additional information. |
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34 * |
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35 * <p>An example of a java <code>String[]</code> containing a list of files is shown |
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36 * below:</p> |
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37 * |
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38 * <code><pre> |
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39 * File file1 = new File("C:\temp\file1"); |
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40 * File file2 = new File("C:\temp\file2"); |
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41 * String[] fileData = new String[2]; |
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42 * fileData[0] = file1.getAbsolutePath(); |
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43 * fileData[1] = file2.getAbsolutePath(); |
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44 * </code></pre> |
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45 */ |
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46 public class FileTransfer : ByteArrayTransfer { |
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47 |
138 | 48 private static FileTransfer _instance; |
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49 private static final String CF_HDROP = "CF_HDROP "; //$NON-NLS-1$ |
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50 private static final int CF_HDROPID = COM.CF_HDROP; |
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51 private static final String CF_HDROP_SEPARATOR = "\0"; //$NON-NLS-1$ |
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52 |
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53 private this() {} |
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54 |
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55 /** |
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56 * Returns the singleton instance of the FileTransfer class. |
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57 * |
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58 * @return the singleton instance of the FileTransfer class |
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59 */ |
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60 public static FileTransfer getInstance () { |
138 | 61 if( _instance is null ){ |
62 synchronized { | |
63 if( _instance is null ){ | |
64 _instance = new FileTransfer(); | |
65 } | |
66 } | |
67 } | |
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68 return _instance; |
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69 } |
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70 |
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71 /** |
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72 * This implementation of <code>javaToNative</code> converts a list of file names |
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73 * represented by a java <code>String[]</code> to a platform specific representation. |
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74 * Each <code>String</code> in the array contains the absolute path for a single |
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75 * file or directory. For additional information see |
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76 * <code>Transfer#javaToNative</code>. |
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77 * |
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78 * @param object a java <code>String[]</code> containing the file names to be |
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79 * converted |
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80 * @param transferData an empty <code>TransferData</code> object; this |
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81 * object will be filled in on return with the platform specific format of the data |
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82 */ |
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83 public void javaToNative(Object object, TransferData transferData) { |
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84 if (!checkFile(object) || !isSupportedType(transferData)) { |
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85 DND.error(DND.ERROR_INVALID_DATA); |
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86 } |
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87 String[] fileNames; |
138 | 88 if( auto strs = cast(ArrayWrapperString2) object ){ |
89 fileNames = strs.array; | |
90 } | |
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91 StringBuffer allFiles = new StringBuffer(); |
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92 for (int i = 0; i < fileNames.length; i++) { |
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93 allFiles.append(fileNames[i]); |
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94 allFiles.append(CF_HDROP_SEPARATOR); // each name is null terminated |
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95 } |
138 | 96 TCHAR[] buffer = StrToTCHARs(0, allFiles.toString(), true); // there is an extra null terminator at the very end |
97 DROPFILES dropfiles; | |
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98 dropfiles.pFiles = DROPFILES.sizeof; |
138 | 99 dropfiles.pt.x = dropfiles.pt.y = 0; |
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100 dropfiles.fNC = 0; |
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101 dropfiles.fWide = OS.IsUnicode ? 1 : 0; |
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102 // Allocate the memory because the caller (DropTarget) has not handed it in |
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103 // The caller of this method must release the data when it is done with it. |
138 | 104 int byteCount = buffer.length * TCHAR.sizeof; |
105 auto newPtr = OS.GlobalAlloc(COM.GMEM_FIXED | COM.GMEM_ZEROINIT, DROPFILES.sizeof + byteCount); | |
106 OS.MoveMemory(newPtr, &dropfiles, DROPFILES.sizeof); | |
107 OS.MoveMemory(newPtr + DROPFILES.sizeof, buffer.ptr, byteCount); | |
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108 transferData.stgmedium = new STGMEDIUM(); |
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109 transferData.stgmedium.tymed = COM.TYMED_HGLOBAL; |
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110 transferData.stgmedium.unionField = newPtr; |
138 | 111 transferData.stgmedium.pUnkForRelease = null; |
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112 transferData.result = COM.S_OK; |
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113 } |
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114 |
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115 /** |
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116 * This implementation of <code>nativeToJava</code> converts a platform specific |
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117 * representation of a list of file names to a java <code>String[]</code>. |
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118 * Each String in the array contains the absolute path for a single file or directory. |
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119 * For additional information see <code>Transfer#nativeToJava</code>. |
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120 * |
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121 * @param transferData the platform specific representation of the data to be |
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122 * been converted |
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123 * @return a java <code>String[]</code> containing a list of file names if the |
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124 * conversion was successful; otherwise null |
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125 */ |
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126 public Object nativeToJava(TransferData transferData) { |
138 | 127 if (!isSupportedType(transferData) || transferData.pIDataObject is null) return null; |
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128 |
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129 // get file names from IDataObject |
138 | 130 IDataObject dataObject = transferData.pIDataObject; |
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131 dataObject.AddRef(); |
138 | 132 FORMATETC* formatetc = new FORMATETC(); |
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133 formatetc.cfFormat = COM.CF_HDROP; |
138 | 134 formatetc.ptd = null; |
135
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135 formatetc.dwAspect = COM.DVASPECT_CONTENT; |
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136 formatetc.lindex = -1; |
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137 formatetc.tymed = COM.TYMED_HGLOBAL; |
138 | 138 STGMEDIUM* stgmedium = new STGMEDIUM(); |
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139 stgmedium.tymed = COM.TYMED_HGLOBAL; |
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140 transferData.result = dataObject.GetData(formatetc, stgmedium); |
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141 dataObject.Release(); |
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142 if (transferData.result !is COM.S_OK) return null; |
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143 // How many files are there? |
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144 int count = OS.DragQueryFile(stgmedium.unionField, 0xFFFFFFFF, null, 0); |
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145 String[] fileNames = new String[](count); |
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146 for (int i = 0; i < count; i++) { |
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147 // How long is the name ? |
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148 int size = OS.DragQueryFile(stgmedium.unionField, i, null, 0) + 1; |
138 | 149 TCHAR[] lpszFile = NewTCHARs(0, size); |
135
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150 // Get file name and append it to string |
138 | 151 OS.DragQueryFile(stgmedium.unionField, i, lpszFile.ptr, size); |
152 fileNames[i] = TCHARzToStr(lpszFile.ptr); | |
135
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153 } |
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154 OS.DragFinish(stgmedium.unionField); // frees data associated with HDROP data |
138 | 155 return new ArrayWrapperString2(fileNames); |
135
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156 } |
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157 |
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158 protected int[] getTypeIds(){ |
138 | 159 return [CF_HDROPID]; |
135
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160 } |
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161 |
212
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162 protected String[] getTypeNames(){ |
138 | 163 return [CF_HDROP]; |
135
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164 } |
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165 bool checkFile(Object object) { |
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166 String[] strings; |
138 | 167 if( auto strs = cast(ArrayWrapperString2)object ){ |
168 strings = strs.array; | |
169 } | |
170 if (!strings) return false; | |
135
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171 for (int i = 0; i < strings.length; i++) { |
138 | 172 if (strings[i] is null || strings[i].length is 0) return false; |
135
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173 } |
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174 return true; |
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175 } |
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176 |
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177 protected bool validate(Object object) { |
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178 return checkFile(object); |
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179 } |
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180 } |