/*

* Copyright (c) 2005 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: 

*       Static utility class for manipulating SMIL DOM

*

*

*/

#include <e32std.h>

#include <gdi.h>

#include <gmxmldocument.h>

#include <gmxmlnode.h>

#include <gmxmlelement.h>

#include <ConformanceChecker.h>

#include "UniSmilUtils.h"

// ---------------------------------------------------------

// UniSmilUtils::StringToIntValue

// Convert a descriptor to TInt

// ---------------------------------------------------------

//

EXPORT_C TInt UniSmilUtils::StringToIntValue( const TDesC& aString, 

                                                    TInt aDefault )

    {

    TInt value = aDefault;

    if( aString.Length() != 0 )

        {

        TChar c = aString[0];

        if( c.IsDigit() )

            {

            TLex luthor( aString );

            luthor.Val( value );

            }

        else

            {

            value = aDefault;

            }

        }

    return value;

    }

// ---------------------------------------------------------

// UniSmilUtils::IsMediaElem

// ---------------------------------------------------------

EXPORT_C TBool UniSmilUtils::IsMediaElem( CMDXMLNode* aNodePtr )

{

    TBool ret = EFalse;

    if ( aNodePtr->NodeType() == CMDXMLNode::EElementNode &&

         UniSmilUtils::MediaElemType( aNodePtr) != EMsgMediaUnknown )

        {

        ret = ETrue;

        }

    return ret;

}

// ---------------------------------------------------------

// UniSmilUtils::NextNode

// ---------------------------------------------------------

EXPORT_C CMDXMLNode* UniSmilUtils::NextNode(CMDXMLNode* aRefNode)

{

    if( aRefNode->FirstChild() )

        {

        aRefNode = aRefNode->FirstChild();

        }

    else

        {

        if( aRefNode->NextSibling() )

            {

            // move to the next sibling if exists

            aRefNode = aRefNode->NextSibling();

            }

        else

            {

            // No siblings at this level. Go up to parent.

            // might need to go up several layers so WHILE rather than IF

            while ( aRefNode && !aRefNode->NextSibling() )

                {

                // no siblings, move back to parent.

                aRefNode = aRefNode->ParentNode();

                }

            // Check if we stopped because node has siblings.

            if ( aRefNode && aRefNode->NextSibling() )

                {

                aRefNode = aRefNode->NextSibling();

                }

            }

        }

    return aRefNode;

}

// ---------------------------------------------------------

// UniSmilUtils::RemoveChildren

// ---------------------------------------------------------

EXPORT_C void UniSmilUtils::RemoveChildren(

    CMDXMLNode* aParent )

    {

    CMDXMLNode* child = NULL;

    if ( aParent )

        {

        child = aParent->FirstChild();

        }

    while ( child )

        {

        if ( child->HasChildNodes() )

            {

            UniSmilUtils::RemoveChildren( child );

            }

        else

            {

            CMDXMLNode* n = child;

            child = child->NextSibling();

            aParent->RemoveChild( n );

            delete n;

            }

        }

    }

// ---------------------------------------------------------

// UniSmilUtils::ElemType

// ---------------------------------------------------------

EXPORT_C TMsgMediaType UniSmilUtils::MediaElemType(CMDXMLNode* aNodePtr) 

{

    TMsgMediaType type(EMsgMediaUnknown);

    if ( aNodePtr )

        {

        TPtrC nName;

        nName.Set(aNodePtr->NodeName());

        if ( nName.Compare(KSMILWREleAnimation) == 0 )

            {

            type = EMsgMediaAnimation;

            }

        else if (nName.Compare(KSMILWREleAudio) == 0 )

            {

            type = EMsgMediaAudio;

            }

        // SVG included. No special SVG element tag exist.

        else if (nName.Compare(KSMILWREleImg) == 0 )

            {

            type = EMsgMediaImage;

            }

        else if (nName.Compare(KSMILWREleRef) == 0 )

            {

            type = EMsgMediaRef;

            }

        else if ( nName.Compare(KSMILWREleText) == 0 )

            {

            type = EMsgMediaText;

            }

        else if ( nName.Compare(KSMILWREleTextstream) == 0 )

            {

            type = EMsgMediaTextStream;

            }

        else if ( nName.Compare(KSMILWREleVideo) == 0 )

            {

            type = EMsgMediaVideo;

            }

        }

    return type;

}

// ---------------------------------------------------------

// UniSmilUtils::GetId

// ---------------------------------------------------------

EXPORT_C TInt UniSmilUtils::GetId( CMDXMLNode* aNodePtr, TPtrC& aId )

    {

    TInt ret = KErrNotSupported;

    if( aNodePtr && aNodePtr->NodeType() == CMDXMLNode::EElementNode )

        {

        CMDXMLElement* e =(CMDXMLElement*) aNodePtr;

        if ( e->IsAttributeSpecified( KSMILWRParaId ))

            {

            e->GetAttribute(KSMILWRParaId, aId);

            ret = KErrNone;

            }

        else

            {

            ret = KErrNotFound;

            }

        }

    return ret;

    }

// ---------------------------------------------------------

// UniSmilUtils::GetMetaTag

// ---------------------------------------------------------

EXPORT_C TInt UniSmilUtils::GetMetaTag( CMDXMLNode* aNodePtr, 

                                   TPtrC& aName, 

                                   TPtrC& aContent )

    {

    TInt ret = KErrNotFound;

    if( aNodePtr &&

        aNodePtr->NodeType() == CMDXMLNode::EElementNode &&

        aNodePtr->NodeName().Compare(KSMILWREleMeta) == 0)

        {

        CMDXMLElement* e = (CMDXMLElement*) aNodePtr;

        if ( e->IsAttributeSpecified( KSMILWRParaName ) &&

             e->IsAttributeSpecified( KSMILWRParaContent ))

            {

            if (!e->GetAttribute(KSMILWRParaName, aName) &&

                !e->GetAttribute(KSMILWRParaContent, aContent))

                {

                ret = KErrNone;

                }

            }

        }

    return ret;

    }

// ---------------------------------------------------------

// UniSmilUtils::RegionId

// ---------------------------------------------------------

EXPORT_C TInt UniSmilUtils::GetRegionId( CMDXMLNode* aNodePtr, TPtrC& aId )

    {

    TInt ret = KErrNotSupported;

    if ( aNodePtr )

        {

        if ( UniSmilUtils::IsMediaElem( aNodePtr ) )

            {

            ret = ((CMDXMLElement*)aNodePtr)->GetAttribute(KSMILWRParaRegion, aId);

            }

        }

    return ret;

    }

// ---------------------------------------------------------

// UniSmilUtils::GetSrc

// ---------------------------------------------------------

EXPORT_C TPtrC UniSmilUtils::GetSrcL( CMDXMLNode* aNodePtr )

{

    TPtrC src = TPtrC();

    if ( aNodePtr )

            {

        CMDXMLElement* e = (CMDXMLElement*) aNodePtr;

        if ( e && e->IsAttributeSpecified(KSMILWRParaSrc) )

            {

            User::LeaveIfError( e->GetAttribute(KSMILWRParaSrc, src) );

            }

        else

            {

            // Ok not to have src i.e. no default content.

            }

        }

    return src;

}

// ---------------------------------------------------------

// UniSmilUtils::GetSmilTypeL

//

// ---------------------------------------------------------

EXPORT_C TUniSmilType UniSmilUtils::GetSmilTypeL( CMDXMLDocument* aDom )

    {

	if (!aDom)

		{

		return ENoSmil;

		}

    if ( UniSmilUtils::IsTemplateSmil( aDom ) )

        {

        return ETemplateSmil;

        }

    else if ( !aDom->DocumentElement() ||

              !aDom->DocumentElement()->FirstChild() )

        {

        return ENoSmil;

        }

    else

        {

        CConformanceChecker* checker = CConformanceChecker::NewL();

        CleanupStack::PushL( checker );

        TBool isConf( EFalse );

        isConf = checker->Check( aDom, EMmsSmil_v2_0,

            EAllowVideoTag |

            EAllowNonMilliseconds |

            EAllowAllAttributes |

            EAllowMixedRegionDimensions |

            EAllowAnyRegionNames );

        CleanupStack::PopAndDestroy( checker );

        if( isConf )

            {

            return EMmsSmil;

            }

        }

    return E3GPPSmil;

    }

// ---------------------------------------------------------

// UniSmilUtils::IsTemplateSmil

//

// ---------------------------------------------------------

EXPORT_C TBool UniSmilUtils::IsTemplateSmil( CMDXMLDocument* aDom )

    {

    TBool ret( EFalse );

    CMDXMLNode* n = aDom->DocumentElement()->FirstChild();

    while ( n )

        {

        if ( n->NodeName().Compare( KSMILWREleMeta ) == 0)

            {

            TPtrC v1, v2;

            if ( !UniSmilUtils::GetMetaTag( n, v1, v2 ) )

                {

                if ( v1.Compare( KSMILMetaSmilProfile ) == 0 &&

                     v2.Compare( KSMILMetaSmilProfileValue ) == 0)

                    {

                    ret = ETrue;

                    break;

                    }

                }

            }

        else if ( n->NodeName().Compare( KSMILWREleBody ) == 0 )

            {

            // Cannot anymore have metatags

            break;

            }

        n = UniSmilUtils::NextNode( n );

        }

    return ret;

    }

// EOF