--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/photosgallery/viewframework/medialists/src/glxthumbnailutility.cpp	Thu Dec 17 08:45:44 2009 +0200
@@ -0,0 +1,144 @@
+/*
+* Copyright (c) 2008-2009 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:    Common utility for thumbnail attributes
+*
+*/
+
+
+
+
+// my include
+#include "glxthumbnailutility.h"
+
+// system includes
+#include <glxtracer.h>
+
+// user includes
+#include "glxmedia.h"
+#include "glxthumbnailattributeinfo.h"
+
+// ---------------------------------------------------------------------------
+// ClosestThumbnail
+// ---------------------------------------------------------------------------
+//
+EXPORT_C /*static*/ TInt GlxThumbnailUtility::ClosestThumbnail(
+        const TSize& aDesiredSize, const CGlxMedia& aMedia, TBool aDrmValid )
+    {
+    TRACER("GlxThumbnailUtility::ClosestThumbnail");
+    
+    TInt selectedIndex = KErrNotFound;
+    TInt selectedQuality = 0;
+    TSize selectedSize;     // Default constructor sets to zero
+    TInt count = aMedia.Count();
+
+    for ( TInt i = 0; i < count; i++ )
+        {
+        const TMPXAttribute& attr( aMedia.Attribute( i ) );
+
+        // is it a thumbnail
+        if ( GlxThumbnailUtility::IsFullThumbnail( attr ))
+            {
+            const CGlxThumbnailAttribute* thumbnail
+                    = static_cast<const CGlxThumbnailAttribute*>(
+                                                aMedia.ValueCObject( attr ) );
+
+            if ( thumbnail )
+                {
+                // Check to see if this is to be the preferred attribute
+                TBool preferThis = ETrue;
+                TInt quality = thumbnail->iThumbnailQuality;
+                TSize size( thumbnail->iDimensions );
+
+                // Compare aspect ratios of required size and
+                // this size to decide if using heights or widths
+                if ( size.iHeight * aDesiredSize.iWidth
+                        >= aDesiredSize.iHeight * size.iWidth )
+                    {
+                    // using heights
+                    preferThis = PreferThisAttribute( size.iHeight,
+                            selectedSize.iHeight, aDesiredSize.iHeight,
+                            quality, selectedQuality, aDrmValid );
+                    }
+                else
+                    {
+                    // using widths
+                    preferThis = PreferThisAttribute( size.iWidth,
+                            selectedSize.iWidth, aDesiredSize.iWidth,
+                            quality, selectedQuality, aDrmValid );
+                    }
+
+                if ( preferThis )
+                    {
+                    // Set this one as preferred so far
+                    selectedIndex = i;
+                    selectedQuality = quality;
+                    selectedSize = size;
+                    }
+                }
+            }
+        }
+
+    return selectedIndex;
+    }
+
+
+// -----------------------------------------------------------------------------
+// IsFullThumbnail
+// -----------------------------------------------------------------------------
+//
+EXPORT_C /*static*/ TBool GlxThumbnailUtility::IsFullThumbnail(const TMPXAttribute& aAttr)
+	{
+	TRACER("GlxThumbnailUtility::IsFullThumbnail");
+	
+	return ((KGlxMediaIdThumbnail == aAttr.ContentId()) 
+    			&& GlxIsFullThumbnailAttribute(aAttr.AttributeId()));
+	}
+
+	
+// -----------------------------------------------------------------------------
+// PreferThisAttribute
+// -----------------------------------------------------------------------------
+//
+/*static*/ TBool GlxThumbnailUtility::PreferThisAttribute(
+                TInt aThisDimen, TInt aSelectedDimen, TInt aReqDimen,
+                TInt aThisQuality, TInt aSelectedQuality, TBool aDrmValid )
+    {
+    TRACER("GlxThumbnailUtility::PreferThisAttribute");
+    
+    TBool preferThis = ETrue;
+
+    if ( aThisDimen == aSelectedDimen )
+        {
+        // Only interested if better quality 
+        preferThis = ( aThisQuality > aSelectedQuality );
+        }
+    else if ( aThisDimen < aReqDimen )
+        {
+        // Only interested if this one is larger than the selected one
+        preferThis = ( aSelectedDimen < aThisDimen );
+        }
+    else if ( aThisDimen > aReqDimen )
+        {
+        // Only interested if the selected one is smaller than requested
+        // or this one is smaller than the selected one
+        preferThis = ( aDrmValid &&
+            ( aSelectedDimen < aReqDimen || aThisDimen < aSelectedDimen ) );
+        }
+    else    // aThisDimen == aReqDimen
+        {
+        // The right size, so choose it
+        }
+
+    return preferThis;
+    }