Mercurial > projects > dwt-win
annotate dwt/dnd/RTFTransfer.d @ 237:e2affbeb686d
Making tango.sys.win32.Types and dwt.internal.win32.WINTYPES to match common declaration. Make ansi charactars of type ubyte.
author | Frank Benoit <benoit@tionex.de> |
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date | Thu, 19 Jun 2008 03:25:36 +0200 |
parents | ab60f3309436 |
children | fd9c62a2998e |
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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.RTFTransfer; |
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14 |
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15 import dwt.internal.ole.win32.COM; |
141 | 16 import dwt.internal.ole.win32.OBJIDL; |
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17 import dwt.internal.win32.OS; |
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18 |
141 | 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; | |
26 | |
27 | |
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28 /** |
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29 * The class <code>RTFTransfer</code> provides a platform specific mechanism |
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30 * for converting text in RTF format represented as a java <code>String</code> |
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31 * to a platform specific representation of the data and vice versa. See |
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32 * <code>Transfer</code> for additional information. |
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33 * |
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34 * <p>An example of a java <code>String</code> containing RTF text is shown |
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35 * below:</p> |
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36 * |
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37 * <code><pre> |
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38 * String rtfData = "{\\rtf1{\\colortbl;\\red255\\green0\\blue0;}\\uc1\\b\\i Hello World}"; |
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39 * </code></pre> |
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40 */ |
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41 public class RTFTransfer : ByteArrayTransfer { |
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42 |
141 | 43 private static RTFTransfer _instance; |
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44 private static const String CF_RTF = "Rich Text Format"; //$NON-NLS-1$ |
141 | 45 private static const int CF_RTFID; |
46 | |
47 static this(){ | |
48 CF_RTFID = registerType(CF_RTF); | |
49 } | |
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50 |
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51 private this() {} |
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52 |
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53 /** |
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54 * Returns the singleton instance of the RTFTransfer class. |
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55 * |
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56 * @return the singleton instance of the RTFTransfer class |
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57 */ |
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58 public static RTFTransfer getInstance () { |
141 | 59 if( _instance is null ){ |
60 synchronized { | |
61 if( _instance is null ){ | |
62 _instance = new RTFTransfer(); | |
63 } | |
64 } | |
65 } | |
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66 return _instance; |
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67 } |
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68 |
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69 /** |
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70 * This implementation of <code>javaToNative</code> converts RTF-formatted text |
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71 * represented by a java <code>String</code> to a platform specific representation. |
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72 * For additional information see <code>Transfer#javaToNative</code>. |
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73 * |
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74 * @param object a java <code>String</code> containing RTF text |
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75 * @param transferData an empty <code>TransferData</code> object; this |
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76 * object will be filled in on return with the platform specific format of the data |
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77 */ |
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78 public void javaToNative (Object object, TransferData transferData){ |
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79 if (!checkRTF(object) || !isSupportedType(transferData)) { |
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80 DND.error(DND.ERROR_INVALID_DATA); |
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81 } |
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82 // CF_RTF is stored as a null terminated byte array |
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83 String string = (cast(ArrayWrapperString)object).array; |
141 | 84 wchar* chars = StrToWCHARz(string); |
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85 int codePage = OS.GetACP(); |
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86 int cchMultiByte = OS.WideCharToMultiByte(codePage, 0, chars, -1, null, 0, null, null); |
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87 if (cchMultiByte is 0) { |
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88 transferData.stgmedium = new STGMEDIUM(); |
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89 transferData.result = COM.DV_E_STGMEDIUM; |
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90 return; |
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91 } |
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92 auto lpMultiByteStr = cast(CHAR*)OS.GlobalAlloc(COM.GMEM_FIXED | COM.GMEM_ZEROINIT, cchMultiByte); |
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93 OS.WideCharToMultiByte(codePage, 0, chars, -1, lpMultiByteStr, cchMultiByte, null, null); |
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94 transferData.stgmedium = new STGMEDIUM(); |
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95 transferData.stgmedium.tymed = COM.TYMED_HGLOBAL; |
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96 transferData.stgmedium.unionField = lpMultiByteStr; |
141 | 97 transferData.stgmedium.pUnkForRelease = null; |
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98 transferData.result = COM.S_OK; |
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99 return; |
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100 } |
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101 |
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102 /** |
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103 * This implementation of <code>nativeToJava</code> converts a platform specific |
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104 * representation of RTF text to a java <code>String</code>. |
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105 * For additional information see <code>Transfer#nativeToJava</code>. |
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106 * |
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107 * @param transferData the platform specific representation of the data to be |
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108 * been converted |
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109 * @return a java <code>String</code> containing RTF text if the |
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110 * conversion was successful; otherwise null |
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111 */ |
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112 public Object nativeToJava(TransferData transferData){ |
141 | 113 if (!isSupportedType(transferData) || transferData.pIDataObject is null) return null; |
114 IDataObject data = transferData.pIDataObject; | |
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115 data.AddRef(); |
141 | 116 STGMEDIUM* stgmedium = new STGMEDIUM(); |
117 FORMATETC* formatetc = transferData.formatetc; | |
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118 stgmedium.tymed = COM.TYMED_HGLOBAL; |
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119 transferData.result = data.GetData(formatetc, stgmedium); |
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120 data.Release(); |
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121 if (transferData.result !is COM.S_OK) return null; |
141 | 122 auto hMem = stgmedium.unionField; |
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123 try { |
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124 auto lpMultiByteStr = cast(CHAR*) OS.GlobalLock(hMem); |
141 | 125 if (lpMultiByteStr is null) return null; |
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126 try { |
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127 int codePage = OS.GetACP(); |
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128 int cchWideChar = OS.MultiByteToWideChar (codePage, OS.MB_PRECOMPOSED, lpMultiByteStr, -1, null, 0); |
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129 if (cchWideChar is 0) return null; |
141 | 130 wchar[] lpWideCharStr = new wchar [cchWideChar - 1]; |
131 OS.MultiByteToWideChar (codePage, OS.MB_PRECOMPOSED, lpMultiByteStr, -1, lpWideCharStr.ptr, lpWideCharStr.length); | |
132 return new ArrayWrapperString( WCHARzToStr(lpWideCharStr.ptr)); | |
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133 } finally { |
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134 OS.GlobalUnlock(hMem); |
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135 } |
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136 } finally { |
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137 OS.GlobalFree(hMem); |
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138 } |
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139 } |
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140 |
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141 protected int[] getTypeIds(){ |
141 | 142 return [CF_RTFID]; |
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143 } |
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144 |
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145 protected String[] getTypeNames(){ |
141 | 146 return [CF_RTF]; |
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147 } |
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148 |
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149 bool checkRTF(Object object) { |
141 | 150 if( auto s = cast(ArrayWrapperString)object ){ |
151 return s.array.length > 0 ; | |
152 } | |
153 return false; | |
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154 } |
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155 |
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156 protected bool validate(Object object) { |
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157 return checkRTF(object); |
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158 } |
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159 } |