author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Fri, 19 Mar 2010 09:28:59 +0200 | |
changeset 23 | 74c9f037fd5d |
child 24 | 99ad1390cd33 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies). |
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* All rights reserved. |
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* This component and the accompanying materials are made available |
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* under the terms of "Eclipse Public License v1.0" |
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* which accompanies this distribution, and is available |
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* at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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* |
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* Initial Contributors: |
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* Nokia Corporation - initial contribution. |
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* |
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* Contributors: |
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* |
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* Description: |
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* |
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*/ |
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#include <mpxcollectionpath.h> |
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#include <mglxmedialist.h> |
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#include <glxcommandfactory.h> |
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#include <GlxCommandHandlerRotate.h> |
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#include <QDebug> |
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#include <ExifRead.h> |
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GlxCommandHandlerRotate::GlxCommandHandlerRotate() |
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{ |
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qDebug("GlxCommandHandlerRotate::GlxCommandHandlerRotate() "); |
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} |
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GlxCommandHandlerRotate::~GlxCommandHandlerRotate() |
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{ |
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qDebug("GlxCommandHandlerRotate::~GlxCommandHandlerRotate() "); |
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} |
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CMPXCommand* GlxCommandHandlerRotate::CreateCommandL(TInt aCommandId, MGlxMediaList& aMediaList, TBool& aConsume) const |
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{ |
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Q_UNUSED(aCommandId); |
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Q_UNUSED(aConsume); |
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qDebug("GlxCommandHandlerRotate::CreateCommandL"); |
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return NULL; |
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} |
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void GlxCommandHandlerRotate::DoExecuteCommandL(TInt aCommandId, MGlxMediaList& aMediaList, TBool& aConsume) |
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{ |
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Q_UNUSED(aCommandId); |
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Q_UNUSED(aConsume); |
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qDebug("GlxCommandHandlerRotate::DoExecuteCommandL"); |
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const TGlxMedia& item = aMediaList.Item( aMediaList.FocusIndex() ); |
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TFileName uri; |
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uri.Copy(item.Uri()); |
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TRAPD(err,RotateImageL(uri)); |
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if(err != KErrNone) { |
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qDebug("GlxCommandHandlerRotate::DoExecuteCommandL Exif Update failed"); |
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} |
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} |
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void GlxCommandHandlerRotate::RotateImageL(TFileName aFileToBeRotated) |
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{ |
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//Start an IFS session |
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//File system |
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User::LeaveIfError(iFs.Connect()); |
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//first initialize the Exif Writer which is responsible for reading and writing the Exif Data |
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//Will leave here itself in cases where the Exif data is absent |
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InitializeExifWriterL(aFileToBeRotated); |
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//read the Orientation tag stored in the Exif Data |
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TUint16 initialOrientation = ReadImageOrientationL(); |
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//as the image is rotated to 90 degrees clockwise calculate the new orientation by adding that angle |
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TUint16 finalOrientation = CalculateFinalOrientationL(initialOrientation); |
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// Set the Final Orientation on the file |
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SetImageOrientationL(finalOrientation); |
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// Clear the sessions acquired |
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DestroyExifWriter(); |
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//close the File Session |
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iFs.Close(); |
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} |
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void GlxCommandHandlerRotate::InitializeExifWriterL(TFileName aFileToBeRotated) |
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{ |
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User::LeaveIfError(iFileHandle.Open(iFs, |
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aFileToBeRotated, EFileWrite)); |
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TInt filesize; |
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User::LeaveIfError(iFileHandle.Size(filesize)); |
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iExifData = HBufC8::NewL(filesize); |
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TPtr8 ptr(iExifData->Des()); |
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User::LeaveIfError(iFileHandle.Read(ptr)); |
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iExifWriter = CExifModify::NewL(*iExifData,CExifModify::EModify,CExifModify::ENoJpegParsing); |
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} |
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TUint16 GlxCommandHandlerRotate::ReadImageOrientationL() |
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{ |
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TUint16 initialOrientation; |
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const CExifRead* exifReader = iExifWriter->Reader(); //not owned |
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User::LeaveIfError(exifReader->GetOrientation(initialOrientation)); |
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qDebug("GlxCommandHandlerRotate::ReadImageOrientationL initial orientation = %d", initialOrientation); |
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return (initialOrientation); |
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} |
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TUint16 GlxCommandHandlerRotate::CalculateFinalOrientationL(TUint16 aInitialOrientation) |
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{ |
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/* |
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* possible orientation state with angles for rotation |
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102 |
* Possible Angles 0 - 90 - 180 - 270 |
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103 |
* Possible states 1 - 8 - 3 - 6 without a Flip |
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|
104 |
* Possible states 2 - 7 - 4 - 5 when Flip is on |
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105 |
*/ |
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106 |
TUint16 finalOrientation = aInitialOrientation; |
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|
107 |
if(aInitialOrientation >8 ) { |
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|
108 |
//invalid orientation passed Leave |
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109 |
User::Leave(KErrCorrupt); |
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110 |
} |
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111 |
TInt rotOffset = 1; |
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112 |
TInt isOrientationOdd = aInitialOrientation % 2; |
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|
113 |
TInt initStateIndex = 0; |
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114 |
TInt finalStateIndex = 0; |
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115 |
//Setting the orientation states for the initial unflipped orientation combinations |
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116 |
TInt orientationStateArray[] = {1,8,3,6}; |
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117 |
//Seting the index for current orientation |
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118 |
if(aInitialOrientation < 3) |
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119 |
{ |
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120 |
initStateIndex = 0; |
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121 |
} |
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122 |
else if(aInitialOrientation >= 3 && aInitialOrientation < 5) |
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123 |
{ |
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124 |
initStateIndex = 2; |
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125 |
} |
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126 |
else if(aInitialOrientation >= 5 && aInitialOrientation < 7) |
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127 |
{ |
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128 |
initStateIndex = 3; |
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129 |
} |
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130 |
else if(aInitialOrientation >= 7 && aInitialOrientation <= 8) |
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131 |
{ |
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132 |
initStateIndex = 1; |
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133 |
} |
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134 |
//Calculating the final orientation using the cyclic orientationStateArray. |
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135 |
//folding final index so that it behaves like a cyclic machine |
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136 |
finalStateIndex = (initStateIndex+rotOffset)%4; |
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|
137 |
finalOrientation = orientationStateArray[finalStateIndex]; |
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138 |
//Checking if a Flip was present |
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139 |
if(aInitialOrientation>4 && isOrientationOdd ) |
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140 |
{ |
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141 |
finalOrientation -= 1; |
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142 |
} |
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|
143 |
if(aInitialOrientation<5 && !isOrientationOdd) |
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144 |
{ |
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|
145 |
finalOrientation += 1; |
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|
146 |
} |
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|
147 |
qDebug("GlxCommandHandlerRotate::CalculateFinalOrientationL final orientation = %d", finalOrientation); |
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148 |
return finalOrientation; |
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149 |
} |
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|
150 |
|
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151 |
void GlxCommandHandlerRotate::SetImageOrientationL(TUint16 aFinalOrientation) |
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152 |
{ |
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153 |
iExifWriter->SetOrientationL(aFinalOrientation); |
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|
154 |
HBufC8* modifiedexifData=NULL; |
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155 |
modifiedexifData = iExifWriter->WriteDataL(iExifData->Des()); |
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|
156 |
User::LeaveIfError(iFileHandle.Write(0,modifiedexifData->Des())); |
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|
157 |
delete modifiedexifData; |
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158 |
} |
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|
159 |
|
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Revision: 201007
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|
160 |
void GlxCommandHandlerRotate::DestroyExifWriter() |
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Revision: 201007
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|
161 |
{ |
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|
162 |
iFileHandle.Close(); |
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Revision: 201007
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|
163 |
if(iExifData != NULL) |
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|
164 |
{ |
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Revision: 201007
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|
165 |
delete iExifData; |
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Revision: 201007
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|
166 |
iExifData = NULL; |
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|
167 |
} |
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Revision: 201007
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|
168 |
if(iExifWriter != NULL) |
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Revision: 201007
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|
169 |
{ |
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Revision: 201007
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|
170 |
delete iExifWriter; |
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Revision: 201007
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|
171 |
iExifWriter = NULL; |
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Revision: 201007
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|
172 |
} |
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Revision: 201007
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|
173 |
} |