MCL/sf/app/commonemail: comparison emailservices/emailclientapi/src/messageiterator.cpp

equal deleted inserted replaced

-:dcf0eedfc1a3
+:d189ee25cf9d
 /*
-* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).
+* Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies).
 * All rights reserved.
 * This component and the accompanying materials are made available
 * under the terms of "Eclipse Public License v1.0"
 * which accompanies this distribution, and is available
 * at the URL "http://www.eclipse.org/legal/epl-v10.html".
 */
 #include "emailmessage.h"
 #include "messageiterator.h"
 #include "emailapiutils.h"
-#include "cfsmailplugin.h"
+#include "CFSMailPlugin.h"
 #include "emailapiutils.h"
 #include "emailclientapi.hrh"
-#include "mfsmailiterator.h"
+#include "MFSMailIterator.h"
 // number of messages in chunk to retrive from protocol plugin. Actual chunk
 // size is one less because last element is used for reference to next chunk
 // retrieval. See ReadNextChunkL() for details.
 const TInt KMessageChunkSize = 5;
 const TInt KUndefined = -1;
 // -----------------------------------------------------------------------------
 //
 // -----------------------------------------------------------------------------
 CMessageIterator* CMessageIterator::NewL(
 MFSMailIterator* aIterator,
 CMessageIterator::~CMessageIterator()
 {
 iPluginData.ReleaseInstance();
 TInt count = iMessageArray.Count();
 iMessageArray.ResetAndDestroy();
-for (TInt i = count; i < iFsMessageArray.Count(); i++)
+for ( TInt i = count; i < iFsMessageArray.Count(); i++ )
 {
 delete iFsMessageArray[i];
 }
 iFsMessageArray.Reset();
 delete iIterator;
 // -----------------------------------------------------------------------------
 void CMessageIterator::Release()
 {
 delete this;
 }
 // -----------------------------------------------------------------------------
 // Returns next message
 // Messages are retrieved from protocol plugin in chunks of x messages and
 // when NextL has be called for x times, next chunk is retrieved. This
 // is trade-off between RAM consumption and speed.
 if ( !ReadNextChunkL() )
 {
 // No messages found,
 // Reset the cursor and return NULL
 iCursor = KUndefined;
 iStartMsgId = TFSMailMsgId();
 return NULL;
 }
 // Items found, return the first item in the buffer
 iCursor = 0;
 }
 // -----------------------------------------------------------------------------
 MEmailMessage* CMessageIterator::PreviousL()
 {
 if ( iCursor == KUndefined )
 {
 iStartMsgId = TFSMailMsgId();
 // Buffer empty, client should first call NextL
 return NULL;
 }
 // Iterate to the previous item
 iCursor--;
 return ReadFromChunkL();
 }
 // -----------------------------------------------------------------------------
 //
 // -----------------------------------------------------------------------------
-TBool CMessageIterator::ReadNextChunkL( )
+TBool CMessageIterator::ReadNextChunkL()
 {
+User::LeaveIfNull( iIterator );
 TBool chunkFound = EFalse;
 // Delete previous items if exist
 CleanCache();
 iHasMoreNextItems = iIterator->NextL(
 iStartMsgId,
 KMessageChunkSize,
 iFsMessageArray );
-if ( iFsMessageArray.Count() > 0)
+if ( iFsMessageArray.Count() > 0 )
 {
 chunkFound = ETrue;
 // Set the cursor to the first item
 iCursor = 0;
 iHasMorePrevItems = ETrue;
 }
 // -----------------------------------------------------------------------------
 //
 // -----------------------------------------------------------------------------
-TBool CMessageIterator::ReadPreviousChunkL( )
+TBool CMessageIterator::ReadPreviousChunkL()
 {
+User::LeaveIfNull( iIterator );
 TBool chunkFound = EFalse;
 // Delete previous items if exist
 CleanCache();
 RPointerArray<CFSMailMessage> tmp;
 iHasMorePrevItems = iIterator->PreviousL(
 iStartMsgId,
 KMessageChunkSize,
 tmp );
 TInt count = tmp.Count();
-if ( count > 0)
+if ( count > 0 )
 {
 // It seems that items have been found
 // Set the cursor to the end of array
 iCursor = count - 1;
 iHasMoreNextItems = ETrue;
 chunkFound = ETrue;
 // Revise the order of the buffer.
 // Create complete cache, so it is easier to iterate,
 // as now we have to start from the end of cache
-for (TInt i = count; i > 0; i--)
+for ( TInt i = count; i > 0; i-- )
 {
 CFSMailMessage* msg = tmp[i-1];
 iFsMessageArray.AppendL( msg );
 AddToCacheL( msg );
 }
 }
 return chunkFound;
 }
 // -----------------------------------------------------------------------------
 //
 // -----------------------------------------------------------------------------
 MEmailMessage* CMessageIterator::ReadFromChunkL()
 // set the cursor to the previous item,
 // and return NULL.
 iCursor--;
 return NULL;
 }
 }
 else if ( iCursor < 0 )
 {
 iStartMsgId = iFsMessageArray[0]->GetMessageId();
 if ( iHasMorePrevItems )
 {
 if ( !ReadPreviousChunkL() )
 {
 // Buffer is empty now, client should call nextL,
 // and start reading from the start of the buffer
 iCursor = KUndefined;
 return NULL;
 }
 }
 else
 {
 // Buffer is empty now, client should call nextL,
 // and start reading from the start of the buffer
 iCursor = KUndefined;
 return NULL;
 }
 }
 if ( iCursor < iFsMessageArray.Count() )
 {
 /* There are items to read in the cache */
 if ( iCursor >= iMessageArray.Count() )
 {
 AddToCacheL( iFsMessageArray[iCursor] );
 }
 return iMessageArray[iCursor];
 }
 else
 {
 // No more items found,
 // set the cursor to the previous item,
 // and return NULL.
 iCursor--;
 return NULL;
 }
 }
 // -----------------------------------------------------------------------------
 //
 // -----------------------------------------------------------------------------
 void CMessageIterator::AddToCacheL( CFSMailMessage* aFsMsg )
 {
 CEmailMessage* message = CEmailMessage::NewL( iPluginData, aFsMsg, EAPIOwns );
-iMessageArray.AppendL(message);
+iMessageArray.AppendL( message );
 }
 // -----------------------------------------------------------------------------
 //
 // -----------------------------------------------------------------------------
 void CMessageIterator::CleanCache()
 {
 // This is strange loop indeed
 // Both arrays has items that are deleted, iMessageArray has objects that point to iFsMessageArray
 // Index in both arrays goes syncronously
 // To prevent double destruction, first delete iMessageArray onjects and then the rest of the iFsMessageArray
 TInt count = iMessageArray.Count();
 iMessageArray.ResetAndDestroy();
-for (TInt i = count; i < iFsMessageArray.Count(); i++)
+for ( TInt i = count; i < iFsMessageArray.Count(); i++ )
 {
-iFsMessageArray.Remove(count);
+iFsMessageArray.Remove( count );
 }
 iFsMessageArray.Reset();
 }
 // -----------------------------------------------------------------------------
 //
 // -----------------------------------------------------------------------------
 //
 // -----------------------------------------------------------------------------
 CMessageIterator::CMessageIterator(
 MFSMailIterator* aIterator,
 CPluginData& aPluginData,
 TUint aCount ) :
 iIterator( aIterator ),
 iPluginData( aPluginData ),
 iStartMsgId( TFSMailMsgId() ),
 iState( EReadNextMessageChunk ),
 iFsMessageArray( KMessageChunkSize ),
 iCount( aCount ),
 iCursor ( KUndefined ),
 iFirstMsgId( TFSMailMsgId() ),
 iHasMoreNextItems( ETrue ),
 iHasMorePrevItems( ETrue )
 {
 }
-// End of file.
+// End of file

branch	RCL_3
changeset 24	d189ee25cf9d
parent 8	e1b6206813b4
child 25	3533d4323edc