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annotate dwt/dnd/URLTransfer.d @ 212:ab60f3309436

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reverted the char[] to String and use the an alias.
author Frank Benoit <benoit@tionex.de>
date Mon, 05 May 2008 00:12:38 +0200
parents 184ab53b7785
children 36f5cb12e1a2
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1 /*******************************************************************************
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2 * Copyright (c) 2000, 2004 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.URLTransfer;
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14
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15 //import java.net.URL;
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16
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17 import dwt.internal.ole.win32.COM;
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18 import dwt.internal.ole.win32.OBJIDL;
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19 import dwt.internal.win32.OS;
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20
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21 import dwt.dnd.ByteArrayTransfer;
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22 import dwt.dnd.TransferData;
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23 import dwt.dnd.DND;
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24
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25 import dwt.dwthelper.utils;
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26 static import tango.text.Text;
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27 alias tango.text.Text.Text!(char) StringBuffer;
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28
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29 /**
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30 * The class <code>URLTransfer</code> provides a platform specific mechanism
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31 * for converting text in URL format represented as a java <code>String[]</code>
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32 * to a platform specific representation of the data and vice versa. See
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33 * <code>Transfer</code> for additional information. The first string in the
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34 * array is mandatory and must contain the fully specified url. The second
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35 * string in the array is optional and if present contains the title for the
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36 * page.
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37 *
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38 * <p>An example of a java <code>String[]</code> containing a URL is shown
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39 * below:</p>
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40 *
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41 * <code><pre>
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42 * String[] urlData = new String[] {"http://www.eclipse.org", "Eclipse.org Main Page"};
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43 * </code></pre>
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44 */
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45 /*public*/ class URLTransfer : ByteArrayTransfer {
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46
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47 static URLTransfer _instance;
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48 static const String CFSTR_INETURL = "UniformResourceLocator"; //$NON-NLS-1$
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49 static const int CFSTR_INETURLID;
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50
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51 static this(){
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52 CFSTR_INETURLID = registerType(CFSTR_INETURL);
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53 }
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54
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55 private this() {}
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56
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57 /**
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58 * Returns the singleton instance of the URLTransfer class.
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59 *
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60 * @return the singleton instance of the URLTransfer class
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61 */
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62 public static URLTransfer getInstance () {
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63 if( _instance is null ){
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64 synchronized {
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65 if( _instance is null ){
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66 _instance = new URLTransfer();
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67 }
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68 }
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69 }
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70 return _instance;
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71 }
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72
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73 /**
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74 * This implementation of <code>javaToNative</code> converts a URL and optionally a title
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75 * represented by a java <code>String[]</code> to a platform specific representation.
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76 * For additional information see <code>Transfer#javaToNative</code>.
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77 *
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78 * @param object a java <code>String[]</code> containing a URL and optionally, a title
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79 * @param transferData an empty <code>TransferData</code> object; this
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80 * object will be filled in on return with the platform specific format of the data
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81 */
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82 public void javaToNative (Object object, TransferData transferData){
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83 if (!checkURL(object) || !isSupportedType(transferData)) {
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84 DND.error(DND.ERROR_INVALID_DATA);
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85 }
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86 transferData.result = COM.E_FAIL;
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87 // URL is stored as a null terminated byte array
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88 String url = (cast(ArrayWrapperString2)object).array[0];
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89 int codePage = OS.GetACP();
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90 wchar[] chars = StrToWCHARs(codePage, url, true );
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91 int cchMultiByte = OS.WideCharToMultiByte(codePage, 0, chars.ptr, -1, null, 0, null, null);
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92 if (cchMultiByte is 0) {
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93 transferData.stgmedium = new STGMEDIUM();
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94 transferData.result = COM.DV_E_STGMEDIUM;
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95 return;
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96 }
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97 auto lpMultiByteStr = cast(char*)OS.GlobalAlloc(OS.GMEM_FIXED | OS.GMEM_ZEROINIT, cchMultiByte);
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98 OS.WideCharToMultiByte(codePage, 0, chars.ptr, -1, lpMultiByteStr, cchMultiByte, null, null);
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99 transferData.stgmedium = new STGMEDIUM();
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100 transferData.stgmedium.tymed = COM.TYMED_HGLOBAL;
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101 transferData.stgmedium.unionField = lpMultiByteStr;
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102 transferData.stgmedium.pUnkForRelease = null;
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103 transferData.result = COM.S_OK;
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104 return;
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105 }
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106
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107 /**
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108 * This implementation of <code>nativeToJava</code> converts a platform specific
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109 * representation of a URL and optionally, a title to a java <code>String[]</code>.
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110 * For additional information see <code>Transfer#nativeToJava</code>.
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111 *
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112 * @param transferData the platform specific representation of the data to be
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113 * been converted
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114 * @return a java <code>String[]</code> containing a URL and optionally a title if the
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115 * conversion was successful; otherwise null
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116 */
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117 public Object nativeToJava(TransferData transferData){
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118 if (!isSupportedType(transferData) || transferData.pIDataObject is null) return null;
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119 IDataObject data = transferData.pIDataObject;
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120 data.AddRef();
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121 STGMEDIUM* stgmedium = new STGMEDIUM();
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122 FORMATETC* formatetc = transferData.formatetc;
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123 stgmedium.tymed = COM.TYMED_HGLOBAL;
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124 transferData.result = data.GetData(formatetc, stgmedium);
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125 data.Release();
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126 if (transferData.result !is COM.S_OK) return null;
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127 auto hMem = stgmedium.unionField;
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128 try {
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129 auto lpMultiByteStr = cast(char*)OS.GlobalLock(hMem);
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130 if (lpMultiByteStr is null) return null;
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131 try {
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132 int codePage = OS.GetACP();
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133 int cchWideChar = OS.MultiByteToWideChar (codePage, OS.MB_PRECOMPOSED, lpMultiByteStr, -1, null, 0);
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134 if (cchWideChar is 0) return null;
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135 wchar[] lpWideCharStr = new wchar [cchWideChar - 1];
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136 OS.MultiByteToWideChar (codePage, OS.MB_PRECOMPOSED, lpMultiByteStr, -1, lpWideCharStr.ptr, lpWideCharStr.length);
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137 return new ArrayWrapperString2( [ WCHARzToStr( lpWideCharStr.ptr) ]);
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138 } finally {
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139 OS.GlobalUnlock(hMem);
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140 }
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141 } finally {
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142 OS.GlobalFree(hMem);
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143 }
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144 }
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145
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146 protected int[] getTypeIds(){
145
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147 return [CFSTR_INETURLID];
135
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148 }
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149
212
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150 protected String[] getTypeNames(){
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151 return [CFSTR_INETURL];
135
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152 }
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153
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154 bool checkURL(Object object) {
145
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155 if( auto s = cast(ArrayWrapperString2)object ){
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156 if( s.array.length is 0 ) return false;
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157 String[] strings = s.array;
145
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158 if (strings[0] is null || strings[0].length is 0) return false;
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159 //PORTING_FIXME: how to validata URL?
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160 /+try {
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161 new URL(strings[0]);
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162 } catch (java.net.MalformedURLException e) {
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163 return false;
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164 }+/
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165 return true;
135
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166 }
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167 return false;
135
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168 }
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169
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170 protected bool validate(Object object) {
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171 return checkURL(object);
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172 }
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173 }