svgtopt/SVG/SVGImpl/src/SVGImageHashMap.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Thu, 07 Jan 2010 16:19:02 +0200
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/*
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* Copyright (c) 2003 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:  SVG Implementation source file
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 *
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*/
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#include "SVGImageHashMap.h"
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// DECODED IMAGE STORAGE FOR IMAGE ELEMENTS TO SHARE
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// SO IMAGES WITH THE SAME XLINK-HREF don't have to decode twice
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// SVG FONT STORAGE FOR JSR 226 ONLY
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// BECAUSE WE DONT HAVE AN ENGINE AT PARSE TIME
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// FOR SVG FONTS
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// ==========================================================================
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// Need method description
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// ==========================================================================
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CSvgImageHashMap* CSvgImageHashMap::NewL()
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    {
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    CSvgImageHashMap*   self    = new ( ELeave ) CSvgImageHashMap;
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    CleanupStack::PushL( self );
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    self->ConstructL();
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    CleanupStack::Pop();
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    return self;
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    }
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// ==========================================================================
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// Need method description
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// ==========================================================================
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CSvgImageHashMap* CSvgImageHashMap::NewLC()
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    {
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    CSvgImageHashMap*   self    = new ( ELeave ) CSvgImageHashMap;
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    CleanupStack::PushL( self );
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    self->ConstructL();
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    return self;
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    }
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// ==========================================================================
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// Need method description
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// ==========================================================================
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void CSvgImageHashMap::ConstructL()
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    {
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    }
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// ==========================================================================
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// Need method description
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// ==========================================================================
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CSvgImageHashMap::CSvgImageHashMap()
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    {
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    }
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// ==========================================================================
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// Need method description
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// ==========================================================================
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CSvgImageHashMap::~CSvgImageHashMap()
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    {
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    	iSvgImageMapItems.ResetAndDestroy();
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    	iSvgImageMapItems.Close();
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    }
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// ==========================================================================
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// CSvgImageHashMap::AddImageL( CFbsBitmap* aImagePtr,
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//                                 const TDesC& aImageName )
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// return ETrue if image added
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// return EFalse if image was already in map
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// ==========================================================================
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TBool CSvgImageHashMap::AddImageL( CFbsBitmap* aImagePtr,
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                                 const TDesC& aImageName )
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{
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	CSvgImageMapItem* lImageMapItem = GetImageMapItem( aImageName );
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    	if (lImageMapItem)
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    	{
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    		//already a reference to this image in the image map
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    		lImageMapItem->IncrementReferenceCount();
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    		return EFalse;
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    	}
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    	else
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    	{
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    		//didnt find that image in the image map...add it
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			CSvgImageMapItem* lNewSvgImageMapItem = CSvgImageMapItem::NewL( );
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			lNewSvgImageMapItem->SetImagePtr( aImagePtr );
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       		lNewSvgImageMapItem->CopyImageNameL( aImageName );
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       		lNewSvgImageMapItem->IncrementReferenceCount();
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			iSvgImageMapItems.Append(lNewSvgImageMapItem);
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			return ETrue;
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		}
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}
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// --------------------------------------------------------------------------
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// TBool CSvgImageHashMap::HasImageName( const TDesC& aImageName
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// ---------------------------------------------------------------------------
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TBool CSvgImageHashMap::HasImageName( const TDesC& aImageName )
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    {
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        TBool lHaveImage = EFalse;
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		TInt svgImageMapItemsCnt = iSvgImageMapItems.Count();
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        for (TInt i=0; i < svgImageMapItemsCnt; i++)
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        {
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            if ( aImageName == ((CSvgImageMapItem*)iSvgImageMapItems[i])->GetImageName() )
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            {
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                lHaveImage = ETrue;
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            }
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        }
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        return lHaveImage;
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    }
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// --------------------------------------------------------------------------
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// CSvgImageMapItem* CSvgImageHashMap::GetImageMapItem( const TDesC& aImageName
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// ---------------------------------------------------------------------------
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CSvgImageMapItem* CSvgImageHashMap::GetImageMapItem( const TDesC& aImageName )
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{
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	TInt svgImageMapItemsCnt = iSvgImageMapItems.Count();
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	for ( TInt i = 0; i < svgImageMapItemsCnt; i++ )
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            {
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            CSvgImageMapItem* lImageMap = (CSvgImageMapItem*)iSvgImageMapItems[i];
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			TInt result = aImageName.Compare( lImageMap->GetImageName() );
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            if ( result == 0 )
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                {
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					return lImageMap;
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				}
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			}
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	return NULL;
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}
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// --------------------------------------------------------------------------
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// TBool CSvgDocumentImpl::RemoveReferenceFromImageL( const TDesC& aImageName )
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// returns True if there aren't any left
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// returns False if there are references to that image left
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// ---------------------------------------------------------------------------
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TBool CSvgImageHashMap::RemoveReferenceFromImageL( const TDesC& aImageName )
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    {
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		CSvgImageMapItem* lImageMapItem = GetImageMapItem( aImageName );
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		if (lImageMapItem != NULL)
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		{
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			//we have this lImageMapElement
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			TInt aReferenceCount = lImageMapItem->DecrementReferenceCount();
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			if (aReferenceCount <= 0)
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			{
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				//no more references to this image remove it from the map
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				iSvgImageMapItems.Remove(iSvgImageMapItems.Find(lImageMapItem));
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				delete lImageMapItem;
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				return ETrue;
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			}
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		}
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		return EFalse;
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    }
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// --------------------------------------------------------------------------
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// CFbsBitmap* CSvgDocumentImpl::GetImagePtr( const TDesC& aImageName )
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// ---------------------------------------------------------------------------
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CFbsBitmap* CSvgImageHashMap::GetImagePtr( const TDesC& aImageName )
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    {
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    CSvgImageMapItem* lImageMapItem = GetImageMapItem( aImageName );
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    if (lImageMapItem)
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    	{
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    	return (lImageMapItem->GetImagePtr());
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    	}
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    	return NULL;
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    }
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// ==========================================================================
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// Need method description
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// ==========================================================================
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CSvgImageMapItem* CSvgImageMapItem::NewL()
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    {
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    CSvgImageMapItem*   self    = new ( ELeave ) CSvgImageMapItem;
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    CleanupStack::PushL( self );
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    self->ConstructL();
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    CleanupStack::Pop();
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    return self;
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    }
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// ==========================================================================
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// Need method description
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// ==========================================================================
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CSvgImageMapItem* CSvgImageMapItem::NewLC()
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    {
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    CSvgImageMapItem*   self    = new ( ELeave ) CSvgImageMapItem;
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    CleanupStack::PushL( self );
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    self->ConstructL();
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    return self;
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    }
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// ==========================================================================
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// Need method description
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// ==========================================================================
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void CSvgImageMapItem::ConstructL()
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    {
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    }
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// ==========================================================================
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// Need method description
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// ==========================================================================
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CSvgImageMapItem::CSvgImageMapItem(): iImageDecodingStatus(EFalse)
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    {
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    }
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// ==========================================================================
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// Need method description
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// ==========================================================================
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CSvgImageMapItem::~CSvgImageMapItem()
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    {
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    	if (iImageName->Length())
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    	{
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    		//delete the xlink-href (base64 image data
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    		delete iImageName;
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    		iImageName = NULL;
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    	}
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    	/*if (iImagePtr)
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    	{
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    		//delete the bitmap
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    		delete iImagePtr;
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    	}*/
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    }
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// ---------------------------------------------------------------------------
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//
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// ---------------------------------------------------------------------------
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CFbsBitmap* CSvgImageMapItem::GetImagePtr()
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    {
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    return iImagePtr;
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    }
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// ---------------------------------------------------------------------------
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//
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// ---------------------------------------------------------------------------
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const TDesC& CSvgImageMapItem::GetImageName()
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    {
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    return ( const TDesC & ) *iImageName;
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    }
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// ---------------------------------------------------------------------------
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//
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// ---------------------------------------------------------------------------
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void CSvgImageMapItem::SetImagePtr( CFbsBitmap* aImagePtr )
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    {
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    iImagePtr = aImagePtr;
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    }
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// ---------------------------------------------------------------------------
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//
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// ---------------------------------------------------------------------------
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void CSvgImageMapItem::CopyImageNameL( const TDesC& aImageName )
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    {
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    iImageName = aImageName.AllocL();
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    }
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//----------------------------------------------------------------------
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//
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//-----------------------------------------------------------------------
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void CSvgImageMapItem::SetImageDecodingStatus( TBool aThisImageIsDecoding )
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	{
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	iImageDecodingStatus = aThisImageIsDecoding;
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	}
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//----------------------------------------------------------------------
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//
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//----------------------------------------------------------------------
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TBool CSvgImageMapItem::GetImageDecodingStatus( )
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	{
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	return iImageDecodingStatus;
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	}
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//-----------------------------------------------------------------------
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//
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//-----------------------------------------------------------------------
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TInt CSvgImageMapItem::IncrementReferenceCount( )
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	{
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	iImageReferenceCount++;
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	return iImageReferenceCount;
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	}
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//-----------------------------------------------------------------------
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//
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//-----------------------------------------------------------------------
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TInt CSvgImageMapItem::DecrementReferenceCount()
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	{
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	iImageReferenceCount--;
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	return iImageReferenceCount;
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	}
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