1 /*

     2 * Copyright (c) 2006 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 the License "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:  Recognizer for the widget supported MIME types.

    15 *

    16 */

    17 

    18 #include "WidgetRecognizer.h"

    19 #include "ImplementationProxy.h"

    20 

    21 // CONSTANTS

    22 _LIT(KWidgetExtension, ".wgz");

    23 _LIT8(KWidgetMimeType,"application/x-nokia-widget");

    24 

    25 //

    26 // CWidgetsRecognizer

    27 //

    28 

    29 // ====================== MEMBER FUNCTIONS =============================

    30 

    31 // ============================================================================

    32 // CWidgetRecognizer::CWidgetRecognizer()

    33 // Default constructor

    34 //

    35 // @since 3.1

    36 // ============================================================================

    37 CWidgetRecognizer::CWidgetRecognizer()

    38 :CApaDataRecognizerType( KUidMimeWidgetRecognizer, CApaDataRecognizerType::EHigh )

    39     {

    40     iCountDataTypes = 1;

    41     }

    42 

    43 // ============================================================================

    44 // From CApaDataRecognizerType

    45 // Gets the size of buffer preferred for the purpose of recognizing the data type.

    46 // @return The preferred data size.

    47 // @since 3.1

    48 // ============================================================================

    49 TUint CWidgetRecognizer::PreferredBufSize()

    50     {

    51     return 0x80;

    52     }

    53 

    54 // ============================================================================

    55 // From CApaDataRecognizerType

    56 // Gets one of the data (MIME) types that the recognizer can recognize.

    57 // @param aIndex - An index that identifies the data type. Typically,

    58 //        the minimum value is zero and the maximum value is the value of MimeTypesCount() - 1.

    59 //

    60 // @return The data (MIME) type.

    61 // @since 3.1

    62 // ============================================================================

    63 TDataType CWidgetRecognizer::SupportedDataTypeL( TInt /*aIndex*/ ) const

    64     {

    65     // only support one widget mime type

    66     return TDataType( KWidgetMimeType() );

    67     }

    68 

    69 // ============================================================================

    70 // From CApaDataRecognizerType

    71 // This implements recognition behaviour -- called by RecognizeL()

    72 // @param aName - The name of the data; typically this is a file name

    73 //                containing the data to be recognized.

    74 // @param aBuffer - A buffer containing data to be recognized; typically,

    75 //                  this is read from the start of the file containing the data.

    76 //

    77 // @return void.

    78 // @since 3.1

    79 // ============================================================================

    80 void CWidgetRecognizer::DoRecognizeL( const TDesC& aName, const TDesC8& /*aBuffer*/ )

    81     {

    82     iConfidence = ENotRecognized;

    83 

    84     if ( aName.Length() >= 4 )

    85         {

    86         TInt dotPos = aName.LocateReverse( '.' );

    87         if ( dotPos != KErrNotFound )

    88             {

    89             TInt extLength = aName.Length() - dotPos;

    90             HBufC* ext = aName.Right( extLength ).AllocL();

    91             CleanupStack::PushL( ext );

    92 

    93             // recognize .wgz extensions.

    94             if (ext->CompareF( KWidgetExtension ) == 0)

    95                 {

    96                 iDataType = TDataType( KWidgetMimeType );

    97                 iConfidence = ECertain;

    98                 }

    99             CleanupStack::PopAndDestroy();  // ext

   100             }

   101         }

   102     }

   103 

   104 // ============================================================================

   105 // CWidgetRecognizer::CreateRecognizerL

   106 // Create CWidgetRecognizer instance

   107 // ============================================================================

   108 //

   109 CApaDataRecognizerType* CWidgetRecognizer::CreateRecognizerL()

   110     {

   111     return new (ELeave) CWidgetRecognizer();

   112     }

   113 

   114 // Implementation table contains only one entry for widget recognizer

   115 const TImplementationProxy ImplementationTable[] =

   116     {

   117     IMPLEMENTATION_PROXY_ENTRY(KWidgetRecognizerImplUIDValue, CWidgetRecognizer::CreateRecognizerL)

   118     };

   119 

   120 // ========================== OTHER EXPORTED FUNCTIONS =========================

   121 

   122 // ============================================================================

   123 // ImplementationGroupProxy

   124 // Returns the filters implemented in this DLL

   125 // Returns: The filters implemented in this DLL

   126 // ============================================================================

   127 //

   128 EXPORT_C const TImplementationProxy* ImplementationGroupProxy(TInt& aTableCount)

   129     {

   130     aTableCount = sizeof(ImplementationTable) / sizeof(TImplementationProxy);

   131     return ImplementationTable;

   132     }