--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/ncdengine/provider/server/src/ncdnodepreviewimpl.cpp Thu Dec 17 08:51:10 2009 +0200
@@ -0,0 +1,444 @@
+/*
+* Copyright (c) 2006 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".
+*
+* Initial Contributors:
+* Nokia Corporation - initial contribution.
+*
+* Contributors:
+*
+* Description: Implements CNcdNodePreview class
+*
+*/
+
+
+#include "ncdnodepreviewimpl.h"
+#include "ncdnodemetadataimpl.h"
+#include "ncdnodeidentifier.h"
+#include "catalogssession.h"
+#include "catalogsbasemessage.h"
+#include "ncdnodefunctionids.h"
+#include "ncdnodeclassids.h"
+#include "catalogsconstants.h"
+#include "ncd_pp_dataentity.h"
+#include "ncd_cp_query.h"
+#include "catalogsutils.h"
+#include "catalogsdebug.h"
+#include "ncd_pp_download.h"
+#include "ncdnodemanager.h"
+#include "ncdproviderdefines.h"
+#include "ncdpreviewmanager.h"
+#include "ncderrors.h"
+
+
+CNcdNodePreview::CNcdNodePreview( const NcdNodeClassIds::TNcdNodeClassId aClassId,
+ CNcdNodeMetaData& aParentMetaData,
+ CNcdNodeManager& aNodeManager )
+: CNcdCommunicable(),
+ iClassId( aClassId ),
+ iParentMetaData( aParentMetaData ),
+ iNodeManager( aNodeManager )
+ {
+ }
+
+void CNcdNodePreview::ConstructL()
+ {
+ }
+
+
+CNcdNodePreview* CNcdNodePreview::NewL( CNcdNodeMetaData& aParentMetaData,
+ CNcdNodeManager& aNodeManager )
+ {
+ CNcdNodePreview* self =
+ CNcdNodePreview::NewLC( aParentMetaData, aNodeManager );
+ CleanupStack::Pop( self );
+ return self;
+ }
+
+CNcdNodePreview* CNcdNodePreview::NewLC( CNcdNodeMetaData& aParentMetaData,
+ CNcdNodeManager& aNodeManager )
+ {
+ CNcdNodePreview* self =
+ new( ELeave ) CNcdNodePreview(
+ NcdNodeClassIds::ENcdNodePreviewClassId,
+ aParentMetaData,
+ aNodeManager );
+ CleanupClosePushL( *self );
+ self->ConstructL();
+ return self;
+ }
+
+
+CNcdNodePreview::~CNcdNodePreview()
+ {
+ DLTRACEIN((""));
+
+ iPreviewMimeTypes.ResetAndDestroy();
+ iUris.ResetAndDestroy();
+
+ DLTRACEOUT((""));
+ }
+
+NcdNodeClassIds::TNcdNodeClassId CNcdNodePreview::ClassId() const
+ {
+ return iClassId;
+ }
+
+
+// Internalization from the protocol
+
+void CNcdNodePreview::InternalizeL( MNcdPreminetProtocolDataEntity& aData )
+ {
+ DLTRACEIN((""));
+
+ iFileCount = aData.PreviewCount();
+
+ HBufC* mimetype;
+ HBufC* uri;
+ iPreviewMimeTypes.ResetAndDestroy();
+ iUris.ResetAndDestroy();
+
+ for( int i = 0; i < iFileCount; i++ )
+ {
+ mimetype = aData.PreviewL( i ).Mime().AllocLC();
+ iPreviewMimeTypes.AppendL( mimetype );
+ CleanupStack::Pop( mimetype );
+ mimetype = 0;
+
+ uri = aData.PreviewL( i ).Uri().AllocLC();
+ iUris.AppendL( uri );
+ CleanupStack::Pop( uri );
+ uri = 0;
+ }
+
+ // Try to update mime types from already downloaded previews
+ // if the server didn't send any for this
+ UpdateMimesFromPreviewManagerL();
+ DLTRACEOUT((""));
+ }
+
+
+// Internalization from and externalization to the database
+
+void CNcdNodePreview::ExternalizeL( RWriteStream& aStream )
+ {
+ DLTRACEIN((""));
+
+ // Set all the membervariable values to the stream. So,
+ // that the stream may be used later to create a new
+ // object.
+
+ // First insert data that the creator of this class object will use to
+ // create this class object. Class id informs what class object
+ // will be created.
+
+ aStream.WriteInt32L( ClassId() );
+
+ aStream.WriteInt16L( iFileCount );
+
+ for( int i = 0; i < iFileCount; i++ )
+ {
+ ExternalizeDesL( *iPreviewMimeTypes[i], aStream );
+ }
+
+ for( int i = 0; i < iFileCount; i++ )
+ {
+ ExternalizeDesL( *iUris[i], aStream );
+ }
+
+ DLTRACEOUT((""));
+ }
+
+
+void CNcdNodePreview::InternalizeL( RReadStream& aStream )
+ {
+ DLTRACEIN((""));
+
+ // Read the class id first because it is set to the stream in internalize
+ // function and it is not read from the stream anywhere else.
+ TInt classId( aStream.ReadInt32L() );
+ if ( classId != ClassId() )
+ {
+ DLERROR(("Wrong class id"));
+ DASSERT( EFalse );
+ // Leave because the stream does not match this class object
+ User::Leave( KErrCorrupt );
+ }
+
+ iFileCount = aStream.ReadInt16L();
+
+ HBufC* previewMimeType = 0;
+ iPreviewMimeTypes.ResetAndDestroy();
+ for( int i = 0; i < iFileCount; i++ )
+ {
+ InternalizeDesL( previewMimeType, aStream );
+ CleanupStack::PushL( previewMimeType );
+ iPreviewMimeTypes.AppendL( previewMimeType );
+ CleanupStack::Pop( previewMimeType );
+ }
+
+ HBufC* uri = 0;
+ iUris.ResetAndDestroy();
+ for( int i = 0; i < iFileCount; i++ )
+ {
+ InternalizeDesL( uri, aStream );
+ CleanupStack::PushL( uri );
+ iUris.AppendL( uri );
+ CleanupStack::Pop( uri );
+ }
+
+ // Try to update MIME from downloaded previews
+ UpdateMimesFromPreviewManagerL();
+ DLTRACEOUT((""));
+ }
+
+
+void CNcdNodePreview::ReceiveMessage( MCatalogsBaseMessage* aMessage,
+ TInt aFunctionNumber )
+ {
+ DLTRACEIN((""));
+
+ DASSERT( aMessage );
+
+ // Now, we can be sure that rest of the time iMessage exists.
+ // This member variable is set for the CounterPartLost function.
+ iMessage = aMessage;
+
+ TInt trapError( KErrNone );
+
+ // Check which function is called by the proxy side object.
+ // Function number are located in ncdnodefunctinoids.h file.
+ switch( aFunctionNumber )
+ {
+ case NcdNodeFunctionIds::ENcdInternalize:
+ // Internalize the proxy side according to the data
+ // of this object.
+ TRAP( trapError, InternalizeRequestL( *aMessage ) );
+ break;
+
+ case NcdNodeFunctionIds::ENcdPreviewOpenFile:
+ TRAP( trapError, OpenPreviewFileL( *aMessage ) );
+ break;
+
+ case NcdNodeFunctionIds::ENcdRelease:
+ // The proxy does not want to use this object anymore.
+ // So, release the handle from the session.
+ ReleaseRequest( *aMessage );
+ break;
+
+ case NcdNodeFunctionIds::ENcdIsPreviewLoaded:
+ TRAP( trapError, IsPreviewLoadedL( *aMessage ));
+ break;
+
+ default:
+ DLERROR(("Unidentified function request"));
+ DASSERT( EFalse );
+ break;
+ }
+
+ if ( trapError != KErrNone )
+ {
+ // Because something went wrong, the complete has not been
+ // yet called for the message.
+ // So, inform the client about the error if the
+ // message is still available.
+ aMessage->CompleteAndRelease( trapError );
+ }
+
+ // Because the message should not be used after this, set it NULL.
+ // So, CounterPartLost function will know that no messages are
+ // waiting the response at the moment.
+ iMessage = NULL;
+
+ DLTRACEOUT((""));
+ }
+
+void CNcdNodePreview::CounterPartLost( const MCatalogsSession& aSession )
+ {
+ // This function may be called whenever -- when the message is waiting
+ // response or when the message does not exist.
+ // iMessage may be NULL here, because in the end of the
+ // ReceiveMessage it is set to NULL. The life time of the message
+ // ends shortly after CompleteAndRelease is called.
+ if ( iMessage != NULL )
+ {
+ iMessage->CounterPartLost( aSession );
+ }
+ }
+
+
+void CNcdNodePreview::InternalizeRequestL( MCatalogsBaseMessage& aMessage )
+ {
+ DLTRACEIN((""));
+
+ CBufBase* buf = CBufFlat::NewL( KBufExpandSize );
+ CleanupStack::PushL( buf );
+
+ RBufWriteStream stream( *buf );
+ CleanupClosePushL( stream );
+
+
+ // Include all the necessary node data to the stream
+ ExternalizeDataForRequestL( stream );
+
+
+ // Commits data to the stream when closing.
+ CleanupStack::PopAndDestroy( &stream );
+
+
+ // If this leaves, ReceiveMessage will complete the message.
+ // NOTE: that here we expect that the buffer contains at least
+ // some data. So, make sure that ExternalizeDataForRequestL inserts
+ // something to the buffer.
+ aMessage.CompleteAndReleaseL( buf->Ptr( 0 ), KErrNone );
+
+
+ DLINFO(("Deleting the buf"));
+ CleanupStack::PopAndDestroy( buf );
+
+ DLTRACEOUT((""));
+ }
+
+
+void CNcdNodePreview::ExternalizeDataForRequestL( RWriteStream& aStream )
+ {
+ DLTRACEIN((""));
+
+ if ( IsObsolete() )
+ {
+ DLINFO(("Set as obsolete. This means that server has removed the object."));
+ User::Leave( KNcdErrorObsolete );
+ }
+
+ aStream.WriteInt32L( ClassId() );
+
+ aStream.WriteInt16L( iFileCount );
+
+ for( int i = 0; i < iFileCount; i++ )
+ {
+ ExternalizeDesL( *iPreviewMimeTypes[i], aStream );
+ }
+
+ DLTRACEOUT((""));
+ }
+
+void CNcdNodePreview::ReleaseRequest( MCatalogsBaseMessage& aMessage ) const
+ {
+ DLTRACEIN((""));
+
+ // Decrease the reference count for this object.
+ // When the reference count reaches zero, this object will be destroyed
+ // and removed from the session.
+ MCatalogsSession& requestSession( aMessage.Session() );
+ TInt handle( aMessage.Handle() );
+
+ // Send complete information back to proxy.
+ aMessage.CompleteAndRelease( KErrNone );
+
+ // Remove this object from the session.
+ requestSession.RemoveObject( handle );
+
+ DLTRACEOUT((""));
+ }
+
+void CNcdNodePreview::OpenPreviewFileL( MCatalogsBaseMessage& aMessage )
+ {
+ DLTRACEIN((""));
+ RBuf8 buf;
+ buf.CreateL( aMessage.InputLength() );
+ CleanupClosePushL( buf );
+ User::LeaveIfError( aMessage.ReadInput( buf ) );
+
+ // Read the requested file index
+ TInt fileIndex = Des8ToInt( buf );
+
+ // Open a new file server session because using the same session
+ // for shared and non-shared files is a security risk
+ RFs fs;
+ CleanupClosePushL( fs );
+ User::LeaveIfError( fs.Connect() );
+
+ // Share the file server session
+ User::LeaveIfError( fs.ShareProtected() );
+
+ DLTRACE(("Open preview file"));
+ RFile openFile = iNodeManager.PreviewManager().PreviewL(
+ fs,
+ iParentMetaData.Identifier(),
+ *iUris[fileIndex] );
+
+ CleanupClosePushL( openFile );
+
+ DLINFO(("File open, transferring to client"));
+ aMessage.CompleteAndReleaseL( fs,
+ openFile );
+
+ // a shared file must be closed on the server side too
+ // also the shared file session must be closed
+ CleanupStack::PopAndDestroy( 2, &fs ); // openFile, fs
+
+ CleanupStack::PopAndDestroy( &buf );
+
+ DLTRACEOUT((""));
+ }
+
+
+TInt CNcdNodePreview::UriCount() const
+ {
+ return iUris.Count();
+ }
+
+
+const TDesC& CNcdNodePreview::Uri( TInt aIndex ) const
+ {
+ return *(iUris[aIndex]);
+ }
+
+
+void CNcdNodePreview::UpdateMimesFromPreviewManagerL()
+ {
+ DLTRACEIN((""));
+ CNcdPreviewManager& previewManager( iNodeManager.PreviewManager() );
+ const CNcdNodeIdentifier& metaId( iParentMetaData.Identifier() );
+
+ TInt count = iFileCount; // use iFileCount since it's the "real" count
+ while ( count-- )
+ {
+ if ( !iPreviewMimeTypes[ count ]->Length() )
+ {
+ const TDesC& mime( previewManager.PreviewMimeType(
+ metaId,
+ *iUris[ count ] ) );
+
+ // assign only if there's something to assign
+ if ( mime.Length() )
+ {
+ AssignDesL( iPreviewMimeTypes[ count ], mime );
+ }
+ }
+ }
+ }
+
+
+void CNcdNodePreview::IsPreviewLoadedL( MCatalogsBaseMessage& aMessage )
+ {
+ RBuf8 buf;
+ buf.CreateL( aMessage.InputLength() );
+ CleanupClosePushL( buf );
+ User::LeaveIfError( aMessage.ReadInput( buf ) );
+
+ TInt fileIndex = Des8ToInt( buf );
+
+ TInt isLoaded = iNodeManager.PreviewManager().PreviewExists(
+ iParentMetaData.Identifier(),
+ *iUris[fileIndex] );
+
+ CleanupStack::PopAndDestroy( &buf );
+
+ aMessage.CompleteAndReleaseL( isLoaded, KErrNone );
+
+ }