mmappcomponents/harvester/filehandler/src/mpxfolderscanner.cpp
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/*
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* Copyright (c) 2006 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:  Folder scanning class to scan files in the file system
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*
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*/
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#include <e32base.h>
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#include <mpxlog.h>
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#include "mpxfolderscanner.h"
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#include "mpxfileadditionobserver.h"
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#include "mpxfilescanstateobserver.h"
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#include "mpxfhcommon.h"
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// CONSTANTS
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const TInt KFileNumBreakCount = 5;
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_LIT( KTxtBackSlash, "\\" );
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// ======== LOCAL FUNCTIONS ========
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// ---------------------------------------------------------------------------
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// RArray compare function to compare strings
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// ---------------------------------------------------------------------------
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//
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static TInt CompareString(const TPath& aFirst,
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                          const TPath& aSecond)
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    {
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    return aFirst.Compare( aSecond );
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    }
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// ======== MEMBER FUNCTIONS ========
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// ---------------------------------------------------------------------------
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// Constructor
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// ---------------------------------------------------------------------------
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//
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CMPXFolderScanner::CMPXFolderScanner( MMPXFileAdditionObserver& aObserver,
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                                      MMPXFileScanStateObserver& aStateObs,
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                                      RFs& aFs  ) : CActive(EPriorityNull),
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                                                  iObserver( aObserver ),
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                                                  iStateObserver( aStateObs ),
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                                                  iFs( aFs )
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    {
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    CActiveScheduler::Add(this);
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    }
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// ---------------------------------------------------------------------------
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// 2nd Phase Constructor
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// ---------------------------------------------------------------------------
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//
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void CMPXFolderScanner::ConstructL()
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    {
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    }
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// ---------------------------------------------------------------------------
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// Two Phased Constructor
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// ---------------------------------------------------------------------------
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//
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CMPXFolderScanner* CMPXFolderScanner::NewL( MMPXFileAdditionObserver& aObserver,
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                                            MMPXFileScanStateObserver& aStateObs,
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                                            RFs& aFs )
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    {
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    CMPXFolderScanner* self = new( ELeave ) CMPXFolderScanner( aObserver, 
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                                                               aStateObs,
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                                                               aFs );
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    CleanupStack::PushL( self );
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    self->ConstructL();
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    CleanupStack::Pop( self );
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    return self;
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    }
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// ---------------------------------------------------------------------------
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// Destructor
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// ---------------------------------------------------------------------------
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//
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CMPXFolderScanner::~CMPXFolderScanner()
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    {
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    Cancel();
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    iDirQueue.ResetAndDestroy();
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    iDrivesToScan.Close();
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    }
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// ---------------------------------------------------------------------------
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// Scans a list of drives for files
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// ---------------------------------------------------------------------------
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//
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void CMPXFolderScanner::ScanL( RArray<TPath>& aDrives )
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    {
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    MPX_DEBUG1("CMPXFolderScanner::ScanL <---");
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    // Copy all the other drives we want to scan
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    //
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    TInt count( aDrives.Count() );
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    MPX_DEBUG2("CMPXFolderScanner::ScanL aDrives %d",count);
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    for( TInt i=0; i<count; ++i )
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        {
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        // Check if we are already scanning this drive
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        TInt found( iDrivesToScan.FindInOrder( aDrives[i], CompareString ) ); 
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        if( found == KErrNotFound )
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            {
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            iDrivesToScan.Append( aDrives[i] );
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            }
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        }
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    // If we were already scanning, don't do it again
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parents:
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   119
    //
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   120
    if( !iScanning )
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parents:
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   121
        {
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parents:
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   122
        // Setup the next drive to scan
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parents:
diff changeset
   123
        //
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parents:
diff changeset
   124
        if( !SetupNextDriveToScanL() )
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parents:
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   125
            {
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   126
            // Kick off the scanning
58
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            iCurDirQueueEntry = iDirQueue[ 0 ];
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   128
            iCurFullPath = iCurDirQueueEntry->iFullPath;
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   129
            ReadDirEntry();
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   130
0
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parents:
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   131
            // We've started scanning
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            iScanning = ETrue;
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parents:
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   133
            }
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parents:
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        else
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            {
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            // Nothing to scan
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parents:
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   137
            DoScanCompleteL(KErrNone);    
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parents:
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   138
            }        
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parents:
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   139
        }
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parents:
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   140
    MPX_DEBUG1("CMPXFolderScanner::ScanL --->");
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    }
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parents:
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   142
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parents:
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// ---------------------------------------------------------------------------
58
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   144
// Reads dir entries asynchronously
hgs
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diff changeset
   145
// ---------------------------------------------------------------------------
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diff changeset
   146
//
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diff changeset
   147
void CMPXFolderScanner::ReadDirEntry()
hgs
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diff changeset
   148
    {
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   149
    ASSERT( !IsActive() );
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   150
    iCurDirQueueEntry->iDir.Read( iCurDirQueueEntry->iEntryArray, iStatus );
hgs
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   151
    SetActive();
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   152
    }
hgs
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hgs
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   154
// ---------------------------------------------------------------------------
0
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// Continue Scanning for more files
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// ---------------------------------------------------------------------------
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//
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parents:
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   158
TBool CMPXFolderScanner::DoScanL()
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parents:
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   159
    {
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   160
    MPX_DEBUG1("CMPXFolderScanner::DoScanL <---");
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parents:
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   161
    TBool done (EFalse);
58
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diff changeset
   162
    TBool blocked ( EFalse );
hgs
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diff changeset
   163
hgs
parents: 27
diff changeset
   164
    // read successfully
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   165
    if ( iStatus == KErrNone || iStatus == KErrEof )
0
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   166
        {
58
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   167
        TBuf<KMaxFileName> buffer;
hgs
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   168
        const TEntry* entry = NULL;
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diff changeset
   169
        TInt numEntries( iCurDirQueueEntry->iEntryArray.Count() );
hgs
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   170
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   171
        // process the entry one by one
hgs
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   172
        while ( iCurDirQueueEntry->iPos < numEntries )
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   173
            {
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   174
            entry = iCurDirQueueEntry->NextEntry();
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   175
            buffer.Zero();
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   176
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   177
            // Generates the full name of the entry
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   178
            buffer.Append( *iCurFullPath );
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   179
            buffer.Append( entry->iName );
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   180
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   181
            if ( entry->IsDir() ) // entry is a directory
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   182
                {
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   183
                buffer.Append( KTxtBackSlash );
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   184
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   185
                blocked = iObserver.IsPathBlockedL( buffer );
0
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parents:
diff changeset
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58
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   187
                if ( !blocked )
hgs
parents: 27
diff changeset
   188
                    {
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diff changeset
   189
                    CDirQueueEntry* newEntry = CDirQueueEntry::NewL( buffer );
hgs
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   190
                    TInt err = newEntry->iDir.Open( iFs,
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parents: 27
diff changeset
   191
                                                    buffer,
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diff changeset
   192
                                             KEntryAttNormal | KEntryAttDir );
hgs
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   193
                    if ( err == KErrNone )
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   194
                        {
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diff changeset
   195
                        CDirQueueEntry::PushL( iDirQueue, newEntry );
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parents: 27
diff changeset
   196
                        }
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   197
                    else
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   198
                        {
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   199
                        delete newEntry;
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parents: 27
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   200
                        }
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   201
                    }
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parents: 27
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   202
                }
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   203
            else // entry is a file
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   204
                {
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   205
                TInt index = iObserver.IsMediaFileL( buffer );
hgs
parents: 27
diff changeset
   206
                if( KErrNotFound != index )
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parents: 27
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   207
                    {
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   208
                    iObserver.HandleFileAdditionL( buffer, index );
hgs
parents: 27
diff changeset
   209
                    }
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parents: 27
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   210
                }
hgs
parents: 27
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   211
            if ( iCurDirQueueEntry->iPos % KFileNumBreakCount == 0 )
hgs
parents: 27
diff changeset
   212
                {
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   213
                return done;
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parents: 27
diff changeset
   214
                }
0
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parents:
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   215
            }
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parents:
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   216
        }
58
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diff changeset
   217
hgs
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   218
    // this dir has other entries to read
hgs
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   219
    if ( iStatus == KErrNone )
0
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parents:
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   220
        {
58
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diff changeset
   221
        iCurDirQueueEntry->ResetPosition();
hgs
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diff changeset
   222
        ReadDirEntry();
hgs
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diff changeset
   223
        }
hgs
parents: 27
diff changeset
   224
hgs
parents: 27
diff changeset
   225
    // there is nothing to read or some error has occured during reading,
hgs
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diff changeset
   226
    // try to move to next dir
hgs
parents: 27
diff changeset
   227
    else
hgs
parents: 27
diff changeset
   228
        {
hgs
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diff changeset
   229
        CDirQueueEntry::PopAndDestroy( iDirQueue );
hgs
parents: 27
diff changeset
   230
        if ( iDirQueue.Count() || !SetupNextDriveToScanL() )
0
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parents:
diff changeset
   231
            {
58
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diff changeset
   232
            iCurDirQueueEntry = iDirQueue[ 0 ];
hgs
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diff changeset
   233
            iCurFullPath = iCurDirQueueEntry->iFullPath;
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parents: 27
diff changeset
   234
            ReadDirEntry();
0
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parents:
diff changeset
   235
            }
58
hgs
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diff changeset
   236
        else // there is nothing to scan
0
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parents:
diff changeset
   237
            {
58
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diff changeset
   238
            done = ETrue;
0
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parents:
diff changeset
   239
            }
a2952bb97e68 Revision: 200949
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parents:
diff changeset
   240
        }
a2952bb97e68 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   241
        
a2952bb97e68 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   242
    MPX_DEBUG1("CMPXFolderScanner::DoScanL --->");
a2952bb97e68 Revision: 200949
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parents:
diff changeset
   243
    return done;
a2952bb97e68 Revision: 200949
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parents:
diff changeset
   244
    }
a2952bb97e68 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   245
a2952bb97e68 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   246
// ---------------------------------------------------------------------------
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parents:
diff changeset
   247
// Setup the object to scan the next directory
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parents:
diff changeset
   248
// ---------------------------------------------------------------------------
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   249
//
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   250
TBool CMPXFolderScanner::SetupNextDriveToScanL()
a2952bb97e68 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   251
    {
a2952bb97e68 Revision: 200949
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parents:
diff changeset
   252
    MPX_DEBUG1("CMPXFolderScanner::SetupNextDriveToScanL <---");
a2952bb97e68 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   253
    
a2952bb97e68 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   254
    TBool done(EFalse);
a2952bb97e68 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   255
    TBool blocked(EFalse);
a2952bb97e68 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   256
    // Scan next drive
58
hgs
parents: 27
diff changeset
   257
    while( iDrivesToScan.Count() && !iDirQueue.Count() )
0
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parents:
diff changeset
   258
        {
58
hgs
parents: 27
diff changeset
   259
        TPath path = iDrivesToScan[0];
hgs
parents: 27
diff changeset
   260
hgs
parents: 27
diff changeset
   261
        MPX_DEBUG1( "CMPXFolderScanner::SetupNextDriveToScanL path blocked?" );
hgs
parents: 27
diff changeset
   262
        blocked = iObserver.IsPathBlockedL( path );
hgs
parents: 27
diff changeset
   263
        MPX_DEBUG2( "CMPXFolderScanner::SetupNextDriveToScanL path blocked %i",
hgs
parents: 27
diff changeset
   264
                    blocked );
hgs
parents: 27
diff changeset
   265
hgs
parents: 27
diff changeset
   266
        // If there was something to scan
hgs
parents: 27
diff changeset
   267
        if( !blocked )
0
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parents:
diff changeset
   268
            {
58
hgs
parents: 27
diff changeset
   269
            CDirQueueEntry* newEntry = CDirQueueEntry::NewL( path );
hgs
parents: 27
diff changeset
   270
            TInt err = newEntry->iDir.Open( iFs,
hgs
parents: 27
diff changeset
   271
                                            path,
hgs
parents: 27
diff changeset
   272
                                            KEntryAttNormal | KEntryAttDir );
hgs
parents: 27
diff changeset
   273
            if ( err == KErrNone )
0
a2952bb97e68 Revision: 200949
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parents:
diff changeset
   274
                {
58
hgs
parents: 27
diff changeset
   275
                CDirQueueEntry::PushL( iDirQueue, newEntry );
0
a2952bb97e68 Revision: 200949
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parents:
diff changeset
   276
                // Inform Observer of the new drive that we are scanning
58
hgs
parents: 27
diff changeset
   277
                iObserver.HandleOpenDriveL( ::ExtractDrive(iDrivesToScan[0]),
0
a2952bb97e68 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   278
                                            iDrivesToScan[0] );
a2952bb97e68 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   279
                }
58
hgs
parents: 27
diff changeset
   280
            else
hgs
parents: 27
diff changeset
   281
                {
hgs
parents: 27
diff changeset
   282
                delete newEntry;
hgs
parents: 27
diff changeset
   283
                }
0
a2952bb97e68 Revision: 200949
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parents:
diff changeset
   284
            }
58
hgs
parents: 27
diff changeset
   285
hgs
parents: 27
diff changeset
   286
        // Remove the 0th element
hgs
parents: 27
diff changeset
   287
        iDrivesToScan.Remove(0);
hgs
parents: 27
diff changeset
   288
        iDrivesToScan.Compress();
hgs
parents: 27
diff changeset
   289
hgs
parents: 27
diff changeset
   290
        }
hgs
parents: 27
diff changeset
   291
hgs
parents: 27
diff changeset
   292
    if ( !iDirQueue.Count() )
hgs
parents: 27
diff changeset
   293
        {
hgs
parents: 27
diff changeset
   294
        done = ETrue;
0
a2952bb97e68 Revision: 200949
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parents:
diff changeset
   295
        }
a2952bb97e68 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   296
    
a2952bb97e68 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   297
    
a2952bb97e68 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   298
    MPX_DEBUG1("CMPXFolderScanner::SetupNextDriveToScanL --->");
a2952bb97e68 Revision: 200949
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parents:
diff changeset
   299
    return done;
a2952bb97e68 Revision: 200949
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parents:
diff changeset
   300
    }
a2952bb97e68 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   301
    
a2952bb97e68 Revision: 200949
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parents:
diff changeset
   302
// ---------------------------------------------------------------------------
a2952bb97e68 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   303
// Handle when scanning is complete
a2952bb97e68 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   304
// ---------------------------------------------------------------------------
a2952bb97e68 Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   305
//
a2952bb97e68 Revision: 200949
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   306
void CMPXFolderScanner::DoScanCompleteL( TInt aErr )
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    {
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    MPX_DEBUG1("CMPXFolderScanner::DoScanCompleteL <---");
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    // Reset all arrays and data
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    iDrivesToScan.Reset();
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   312
    iDirQueue.ResetAndDestroy();
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0
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    // All done!
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    iScanning = EFalse;
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0
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    // Callback to observer
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    iStateObserver.HandleScanStateCompleteL( MMPXFileScanStateObserver::EScanFiles, 
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                                              aErr );
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   321
    MPX_DEBUG1("CMPXFolderScanner::DoScanCompleteL --->");
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    }
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// ---------------------------------------------------------------------------
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// From CActive
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// ---------------------------------------------------------------------------
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//
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void CMPXFolderScanner::RunL()
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    {
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    MPX_DEBUG1("CMPXFolderScanner::RunL <---");
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    // Do more scanning
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    TBool done(EFalse);
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   334
    TRAPD( err, done = DoScanL() );   
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    // We are all done
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    //
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   338
    if( KErrNone != err || done )
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        {
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        DoScanCompleteL( err );
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   341
        }
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   342
    else if ( iCurDirQueueEntry->iPos ) // if( !done )
0
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   343
        {
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        MPX_DEBUG1("CMPXFolderScanner::RunL -- Run again");
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        iStatus = KRequestPending;
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        SetActive();
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        TRequestStatus* status = &iStatus;
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        User::RequestComplete( status, KErrNone );
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        }
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    }
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// ---------------------------------------------------------------------------
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// From CActive
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// ---------------------------------------------------------------------------
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//
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   356
void CMPXFolderScanner::DoCancel()
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    {
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    if( iScanning )
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   359
        {
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        // Callback to observer with the partial list?
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        TRAP_IGNORE( DoScanCompleteL( KErrCancel ) );
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   362
        }
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   363
    }
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   364
    
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// ----------------------------------------------------------------------------
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// Handles a leave occurring in the request completion event handler RunL()
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// ----------------------------------------------------------------------------
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//
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TInt CMPXFolderScanner::RunError(TInt aError)
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   370
    {
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    MPX_DEBUG2("CMPXFolderScanner::RunError(%d)", aError );
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   372
    
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   373
    TRAP_IGNORE( DoScanCompleteL( aError ) );
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   374
    
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   375
    return KErrNone;
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   376
    }
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   377
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   378
// ---------------------------------------------------------------------------
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   379
// Two Phased Constructor
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   380
// ---------------------------------------------------------------------------
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diff changeset
   381
//
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diff changeset
   382
CMPXFolderScanner::CDirQueueEntry* CMPXFolderScanner::CDirQueueEntry::NewL(
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diff changeset
   383
                                                    const TDesC& aFullPath )
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diff changeset
   384
    {
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   385
    CDirQueueEntry* self = new ( ELeave ) CDirQueueEntry;
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diff changeset
   386
    CleanupStack::PushL( self );
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diff changeset
   387
    self->ConstructL( aFullPath );
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diff changeset
   388
    CleanupStack::Pop( self );
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diff changeset
   389
    return self;
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diff changeset
   390
    }
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diff changeset
   391
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   392
// ---------------------------------------------------------------------------
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diff changeset
   393
// Destructor
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diff changeset
   394
// ---------------------------------------------------------------------------
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diff changeset
   395
//
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diff changeset
   396
CMPXFolderScanner::CDirQueueEntry::~CDirQueueEntry()
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diff changeset
   397
    {
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   398
    iDir.Close();
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diff changeset
   399
    delete iFullPath;
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diff changeset
   400
    }
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diff changeset
   401
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diff changeset
   402
// ---------------------------------------------------------------------------
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diff changeset
   403
// Push a dir entry into a dir entry queue
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diff changeset
   404
// ---------------------------------------------------------------------------
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diff changeset
   405
//
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diff changeset
   406
void CMPXFolderScanner::CDirQueueEntry::PushL(
hgs
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diff changeset
   407
                                     RPointerArray<CDirQueueEntry>& aDirQueue,
hgs
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diff changeset
   408
                                     CDirQueueEntry* aDirEntry )
hgs
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diff changeset
   409
    {
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diff changeset
   410
    aDirQueue.AppendL( aDirEntry );
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diff changeset
   411
    }
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diff changeset
   412
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diff changeset
   413
// ---------------------------------------------------------------------------
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diff changeset
   414
// Pop and destroy a dir entry from a dir entry queue
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diff changeset
   415
// ---------------------------------------------------------------------------
hgs
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diff changeset
   416
//
hgs
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diff changeset
   417
void CMPXFolderScanner::CDirQueueEntry::PopAndDestroy(
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diff changeset
   418
                                  RPointerArray< CDirQueueEntry >& aDirQueue )
hgs
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diff changeset
   419
    {
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diff changeset
   420
    CDirQueueEntry* entry = aDirQueue[ 0 ];
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diff changeset
   421
    delete entry;
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diff changeset
   422
    aDirQueue.Remove( 0 );
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diff changeset
   423
    }
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diff changeset
   424
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diff changeset
   425
// ---------------------------------------------------------------------------
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diff changeset
   426
// CMPXFolderScanner::CDirQueueEntry::NextEntry
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diff changeset
   427
// ---------------------------------------------------------------------------
hgs
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diff changeset
   428
//
hgs
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diff changeset
   429
const TEntry* CMPXFolderScanner::CDirQueueEntry::NextEntry()
hgs
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diff changeset
   430
    {
hgs
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diff changeset
   431
    const TEntry* entry = NULL;
hgs
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diff changeset
   432
    if ( iPos >= 0 && iPos < iEntryArray.Count() )
hgs
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diff changeset
   433
        {
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diff changeset
   434
        entry = &iEntryArray[ iPos++ ];
hgs
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diff changeset
   435
        }
hgs
parents: 27
diff changeset
   436
    return entry;
hgs
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diff changeset
   437
    }
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diff changeset
   438
hgs
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diff changeset
   439
// ---------------------------------------------------------------------------
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diff changeset
   440
// Reset the current position of entry array
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diff changeset
   441
// ---------------------------------------------------------------------------
hgs
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diff changeset
   442
//
hgs
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diff changeset
   443
void CMPXFolderScanner::CDirQueueEntry::ResetPosition()
hgs
parents: 27
diff changeset
   444
    {
hgs
parents: 27
diff changeset
   445
    iPos = 0;
hgs
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diff changeset
   446
    }
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diff changeset
   447
hgs
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diff changeset
   448
// ---------------------------------------------------------------------------
hgs
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diff changeset
   449
// Constructor
hgs
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diff changeset
   450
// ---------------------------------------------------------------------------
hgs
parents: 27
diff changeset
   451
//
hgs
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diff changeset
   452
CMPXFolderScanner::CDirQueueEntry::CDirQueueEntry()
hgs
parents: 27
diff changeset
   453
    {
hgs
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diff changeset
   454
    // Do nothing
hgs
parents: 27
diff changeset
   455
    }
hgs
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diff changeset
   456
hgs
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diff changeset
   457
// ---------------------------------------------------------------------------
hgs
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diff changeset
   458
// 2nd Phase Contructor
hgs
parents: 27
diff changeset
   459
// ---------------------------------------------------------------------------
hgs
parents: 27
diff changeset
   460
//
hgs
parents: 27
diff changeset
   461
void CMPXFolderScanner::CDirQueueEntry::ConstructL( const TDesC& aFullPath )
hgs
parents: 27
diff changeset
   462
    {
hgs
parents: 27
diff changeset
   463
    iFullPath = aFullPath.AllocL();
hgs
parents: 27
diff changeset
   464
    }