1 /*

     2 * Copyright (c) 2002 Nokia Corporation and/or its subsidiary(-ies).

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

     5 * under the terms of "Eclipse Public License v1.0"

     6 * which accompanies this distribution, and is available

     7 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description: 

    15 *     Implements character converter for application.

    16 *

    17 */

    18 

    19 

    20 // INCLUDE FILES

    21 #include <bldvariant.hrh>

    22 #include <eikenv.h>

    23 #include <miutconv.h>

    24 #ifdef SYMBIAN_ENABLE_SPLIT_HEADERS  

    25 #include <cimconvertcharconv.h>

    26 #endif

    27 #include "MsgMailViewerCharConv.h"

    28 

    29 // CONSTANTS

    30 const TInt KBlockSize = 64;

    31 

    32 

    33 // ================= MEMBER FUNCTIONS =======================

    34 

    35 // Default constructor

    36 CMsgMailViewerCharConv::CMsgMailViewerCharConv()

    37 : iState( CCnvCharacterSetConverter::KStateDefault )

    38     { 

    39     }

    40 

    41 // destructor

    42 CMsgMailViewerCharConv::~CMsgMailViewerCharConv()

    43     {

    44     delete iCharConv;

    45     delete iImCharConv;

    46     delete iTarget8;

    47     delete iTarget16;

    48     }

    49 

    50 // Symbian OS default constructor can leave.

    51 void CMsgMailViewerCharConv::ConstructL( TUint aCharSet )

    52     {

    53     if (aCharSet > 0)

    54         {

    55         iCharConv = CCnvCharacterSetConverter::NewL();

    56         iImCharConv = CImConvertCharconv::NewL(

    57             *iCharConv, CEikonEnv::Static()->FsSession());			// CSI: 27 # Must be used because of iEikEnv 

    58 																	// is not accessible.

    59         TBool found = iImCharConv->PrepareToConvertToFromOurCharsetL(aCharSet);

    60         if (!found)

    61             {

    62             User::Leave( KErrNotFound );

    63             }

    64         }

    65     }

    66 

    67 // Two-phased constructor.

    68 CMsgMailViewerCharConv* CMsgMailViewerCharConv::NewL(

    69         TUint aCharSet )     // CMsgMailViewerApp reference

    70     {

    71     CMsgMailViewerCharConv* self = new (ELeave) CMsgMailViewerCharConv();

    72     CleanupStack::PushL( self );

    73     self->ConstructL( aCharSet );

    74     CleanupStack::Pop();

    75 

    76     return self;

    77     }

    78 

    79 void CMsgMailViewerCharConv::PrepareToConvertFromUnicodeL( const TDesC16& aSource )

    80     {

    81     iSource16.Set( aSource );

    82 

    83     delete iTarget8;

    84     iTarget8 = NULL;

    85     iTarget8 = HBufC8::NewL( iSource16.Length()*2 );		// CSI: 47 # For conversion.

    86 

    87     iFromUnicode = ETrue;

    88     iFailCount = 0;

    89     }

    90 

    91 void CMsgMailViewerCharConv::PrepareToConvertToUnicodeL( const TDesC8& aSource )

    92     {

    93     iSource8.Set( aSource );

    94 

    95     delete iTarget16;

    96     iTarget16 = NULL;

    97     iTarget16 = HBufC16::NewL( iSource8.Length() );

    98 

    99     iFromUnicode = EFalse;

   100     }

   101 

   102 HBufC16* CMsgMailViewerCharConv::GetUnicodeText()

   103     {

   104     HBufC16* result = iTarget16;

   105     iTarget16 = NULL;

   106 

   107     return result;

   108     }

   109     

   110 HBufC8* CMsgMailViewerCharConv::GetForeignText()

   111     {

   112     HBufC8* result = iTarget8;

   113     iTarget8 = NULL;

   114 

   115     return result;

   116     }

   117 

   118 TInt CMsgMailViewerCharConv::GetFailedCount() const

   119     {

   120     return iFailCount;

   121     }

   122     

   123 void CMsgMailViewerCharConv::AppendTextL( const TDesC16& aData )

   124     {

   125     TPtr target( iTarget16->Des() );

   126     TInt length = target.Length() + aData.Length();

   127     if( length > target.MaxLength() )

   128         {

   129         iTarget16 = iTarget16->ReAllocL( length );

   130         target.Set( iTarget16->Des() );

   131         }

   132 

   133     target.Append( aData );

   134     }

   135 

   136 void CMsgMailViewerCharConv::AppendTextL( const TDesC8& aData )

   137     {

   138     TPtr8 target( iTarget8->Des() );

   139     TInt length = target.Length() + aData.Length();

   140     if( length > target.MaxLength() )

   141         {

   142         iTarget8 = iTarget8->ReAllocL( length );

   143         target.Set( iTarget8->Des() );

   144         }

   145 

   146     target.Append( aData );

   147     }

   148 

   149 void CMsgMailViewerCharConv::StepL()

   150     {

   151     if( iFromUnicode )

   152         {

   153         StepFromUnicodeL();

   154         }

   155     else

   156         {

   157         StepToUnicodeL();

   158         }

   159     }

   160 

   161 void CMsgMailViewerCharConv::StepFromUnicodeL()

   162     {

   163     if (iImCharConv)

   164         {

   165         TBuf8<KBlockSize> buf;

   166         TInt firstUnconvertdChar;

   167         TInt numUnconvertedChars;

   168         

   169         TInt length (iImCharConv->ConvertFromOurCharsetL( iSource16, buf, 

   170             numUnconvertedChars, 

   171             firstUnconvertdChar));

   172         

   173         iFailCount += numUnconvertedChars;

   174         User::LeaveIfError( length );

   175         

   176         iSource16.Set( iSource16.Right( length ) );

   177         

   178         AppendTextL( buf );

   179         }

   180     else

   181         {

   182         // No converter, just copy source to target

   183         iTarget8->Des().Copy(iSource16);

   184         iSource16.Set( KNullDesC() );

   185         }

   186     }

   187 

   188 void CMsgMailViewerCharConv::StepToUnicodeL()

   189     {

   190     if (iImCharConv)

   191         {

   192         TBuf16<KBlockSize> buf;

   193         TInt firstUnconvertdChar;

   194         TInt numUnconvertedChars;

   195         

   196         TInt length (iImCharConv->ConvertToOurCharsetL( iSource8, buf, 

   197             numUnconvertedChars, 

   198             firstUnconvertdChar));

   199         

   200         User::LeaveIfError( length );

   201         

   202         iSource8.Set( iSource8.Right( length ) );

   203         

   204         AppendTextL( buf );

   205         }

   206     else

   207         {

   208         // just copy source to target

   209         iTarget16->Des().Copy(iSource8);

   210         iSource8.Set( KNullDesC8() );

   211         }

   212     }

   213 

   214 

   215 TBool CMsgMailViewerCharConv::IsProcessDone() const

   216     {

   217     TBool ret( EFalse );

   218 

   219     if( iFromUnicode )

   220         {

   221         ret = iSource16.Length() == 0;

   222         }

   223     else

   224         {

   225         ret = iSource8.Length() == 0;

   226         }

   227 

   228     return ret;

   229     }

   230 

   231 // End of File