--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ncdengine/provider/protocol/src/ncdparserimpl.cpp	Thu Dec 17 08:51:10 2009 +0200
@@ -0,0 +1,335 @@
+/*
+* 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:   CNcdParserImpl implementation
+*
+*/
+
+
+#include <xml/parser.h>
+#include <xml/documentparameters.h>
+#include <xml/taginfo.h>
+#include <xml/attribute.h>
+
+#include <s32file.h>
+
+#include "ncdparserimpl.h"
+#include "ncdparserobserverbundleimpl.h"
+#include "ncdtoplevelparser.h"
+#include "ncdprotocolutils.h"
+#include "catalogsdebug.h"
+#include "ncdprotocoldefaultobserver.h"
+
+
+// Input buffer grow size for CBufSeg when appending new xml data in async mode
+const TInt KInputBufferGrowSize( 4096 );
+
+// Size of the buffer for the data to be processed in one async step.
+// This is an important figure as it determines the time used in the parser
+// in each step. Too big -> too unresponsive a system, too small --> too slow
+// a parsing operation.
+const TInt KFeedBufferSize( 1024 );
+
+CNcdParserImpl* CNcdParserImpl::NewL( 
+    MNcdProtocolDefaultObserver* aDefaultObserver )
+    {
+    CNcdParserImpl* self = new(ELeave) CNcdParserImpl( aDefaultObserver );
+    CleanupStack::PushL( self );
+    self->ConstructL();
+    CleanupStack::Pop( self );
+    return self;
+    }
+
+
+CNcdParserImpl::CNcdParserImpl( 
+    MNcdProtocolDefaultObserver* aDefaultObserver  )
+    : CActive( EPriorityStandard ), 
+      iDefaultObserver( aDefaultObserver )
+    {
+    CActiveScheduler::Add( this );
+    }
+
+CNcdParserImpl::~CNcdParserImpl()
+    {
+    DLTRACEIN((""));
+    CancelParsing();
+    
+    delete iXmlParser;
+    
+    DLINFO((""));
+    delete iSubParser;
+    
+    DLINFO((""));
+    delete iInputBuffer;
+    DLINFO((""));
+    delete iFeedBuffer;
+    DLINFO((""));
+    delete iObservers;
+    DLINFO((""));
+    delete iDefaultObserver;
+    DLTRACEOUT((""));
+    }
+
+void CNcdParserImpl::ConstructL()
+    {
+    iObservers = CNcdParserObserverBundleImpl::NewL( iDefaultObserver );
+    }
+
+
+
+MNcdParserObserverBundle& CNcdParserImpl::Observers() const
+    {
+    return *iObservers;
+    }
+
+MNcdProtocolDefaultObserver& CNcdParserImpl::DefaultObserver() const
+    {
+    return *iDefaultObserver;
+    }
+
+
+void CNcdParserImpl::BeginSyncL()
+    {
+    DLTRACEIN((""));    
+    BeginSyncL( NULL );
+    }
+
+
+void CNcdParserImpl::BeginSyncL( CNcdSubParser* aSubParser )
+    {
+    DLTRACEIN((""));
+    iSynchronous = ETrue;
+    BeginL( aSubParser );
+    }
+
+
+void CNcdParserImpl::BeginAsyncL()
+    {
+    DLTRACEIN((""));
+    BeginAsyncL( NULL );
+    }
+    
+    
+void CNcdParserImpl::BeginAsyncL( CNcdSubParser* aSubParser )
+    {
+    DLTRACEIN((""));
+    iSynchronous = EFalse;
+    iPleaseFinish = EFalse;
+    CleanupStack::PushL( aSubParser );
+    delete iFeedBuffer;
+    iFeedBuffer = 0;
+    iFeedBuffer = HBufC8::NewL( KFeedBufferSize );
+    CleanupStack::Pop( aSubParser );
+    
+    BeginL( aSubParser );
+    }
+    
+    
+void CNcdParserImpl::BeginL( CNcdSubParser* aSubParser )
+    {
+    DLTRACEIN(("begin"));
+
+    DASSERT( iObservers->ParserObserver() );
+
+    iCancelled = EFalse;
+
+    delete iSubParser;
+    iSubParser = 0;
+    
+    if ( aSubParser ) 
+        {
+        DLTRACE(("Using given subparser"));
+        iSubParser = aSubParser;
+        }
+    else 
+        {   
+        DLTRACE(("Using toplevel parser"));     
+        iSubParser = CNcdTopLevelParser::NewL( 
+            *iObservers, *this, 0 /*initial depth=0*/ );
+        }
+
+    delete iInputBuffer;
+    iInputBuffer = 0;
+    iInputBuffer = CBufSeg::NewL( KInputBufferGrowSize );
+
+    delete iXmlParser;
+    iXmlParser = 0;
+
+    _LIT8( KXmlType, "text/xml" );
+    iXmlParser = Xml::CParser::NewL( KXmlType, *iSubParser );
+    iXmlParser->ParseBeginL();
+    }
+
+void CNcdParserImpl::EndL()
+    {
+    DLTRACEIN(("data left=%d",iInputBuffer->Size()));
+
+    if( iSynchronous || ( !IsActive() && iInputBuffer->Size() == 0 ) )
+        {
+        DLINFO(("sync end"));
+        // After ParseEndL() OnError() call may come if the end of the data
+        // is screwed.
+        iXmlParser->ParseEndL();
+
+        // Cancel callback removed according to users' wishes.
+        if ( !iCancelled ) 
+            iObservers->ParserObserver()->ParseCompleteL( KErrNone );
+        }
+    else
+        {
+        DLINFO(("please finish"));
+        iPleaseFinish = ETrue;
+        }
+    DLTRACEOUT((""));
+    }
+
+void CNcdParserImpl::SetOriginL( const TDesC& aOrigin )
+    {
+    iObservers->SetSessionOriginL( aOrigin );
+    }
+
+void CNcdParserImpl::ParseL( const TDesC8& aData )
+    {
+    DLTRACEIN(("8-bit parse, length=%d",aData.Length()));
+    DLINFO(("data=%S",&aData));
+
+    if( iSynchronous )
+        {
+        iXmlParser->ParseL( aData );
+        }
+    else
+        {
+        DLINFO(("inserting, buffer size=%d",iInputBuffer->Size()));
+        // Compress to free some memory if possible.
+        iInputBuffer->Compress();
+        iInputBuffer->InsertL( iInputBuffer->Size(), aData );
+        if( ! IsActive() )
+            {
+            DLINFO(("activating"));
+            iStatus = KRequestPending;
+            SetActive();
+            TRequestStatus* status = &iStatus;
+            User::RequestComplete( status, KErrNone );
+            }
+        }
+    }
+
+void CNcdParserImpl::ParseL( const TDesC16& aData )
+    {
+    DLTRACEIN(("16-bit parse, length=%d",aData.Length()));
+    HBufC8* utf8 = NcdProtocolUtils::ConvertUnicodeToUtf8L( aData );
+    CleanupStack::PushL( utf8 );
+    ParseL( *utf8 );
+    CleanupStack::PopAndDestroy( utf8 );
+    }
+
+
+void CNcdParserImpl::SubParserFinishedL( const TDesC8& /*aTag*/, TInt /*aErrorCode*/ )
+    {
+    DLTRACE((""));
+    }
+
+
+void CNcdParserImpl::CancelParsing()
+    {
+    DLTRACE(("active=%d", IsActive() ));
+    if( !IsActive() )
+        {
+        iCancelled = ETrue;
+        }
+    
+    // Prevent another Cancel-call while handling the first one
+    if ( !iCancelled ) 
+        {
+        Cancel();
+        }
+    }
+
+void CNcdParserImpl::DoCancel()
+    {
+    DLTRACE(("iCancelled=%d", iCancelled ));
+
+    // iCancelled is never ETrue when coming here unless someone
+    // errorneously calls CNcdParserImpl::Cancel() from outside this class
+    iCancelled = ETrue;
+    TRAP_IGNORE( 
+        {
+        // this usually causes a parse error callback to the observer
+        iXmlParser->ParseEndL();
+        } );
+    }
+
+TInt CNcdParserImpl::RunError( TInt aError )
+    {
+    DLERROR(("Fatal parser error %d",aError));
+    iObservers->ParserObserver()->ParseError( aError );
+    return KErrNone;
+    }
+
+void CNcdParserImpl::RunL()
+    {
+    TRequestStatus* status = &iStatus;
+    DLTRACEIN(("data left=%d status=%d",iInputBuffer->Size(),status->Int()));
+
+    if( iCancelled )
+        {
+        DLINFO(("user cancelled!"));
+        return;
+        }
+
+    // @ Is it even possible to get != KErrNone here?
+    if( status->Int() != KErrNone )
+        {
+        DLERROR(("RunL() error, canceling!"));
+        CancelParsing();
+        return;
+        }
+
+    if( iInputBuffer->Size() == 0 )
+        {
+        // All done.
+        DLINFO(("all done"));
+        if( iPleaseFinish )
+            {
+            EndL();
+            }
+        return;
+        }
+
+    TPtr8 buf = iFeedBuffer->Des();
+    TInt length = buf.MaxSize();
+    if( iInputBuffer->Size() < length )
+        {
+        length = iInputBuffer->Size();
+        }
+    iInputBuffer->Read( 0, buf, length );
+    iInputBuffer->Delete( 0, buf.Length() );
+    iXmlParser->ParseL( buf );
+
+    // Next step
+    
+    // Check again if the parser is cancelled. It is possible since callbacks occur
+    // as consequence of calling ParseL.
+    if ( iCancelled ) 
+        {
+        return;
+        }
+        
+    iStatus = KRequestPending;
+    SetActive();
+    User::RequestComplete( status, KErrNone );
+
+    }
+
+
+