/*

* 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:  Series 60 layout font constructed from a font specification or a 

*  combination of font specification plus typeface or typeface alias

*

*/

// INCLUDE FILES

#include <eikdef.h>

#include <eikenv.h>

#include <aknenv.h>

#include "AknPanic.h"

#include "AknFontSpecificationLayoutFont.h"

#include <AknFontSpecification.h>

#include <AknFontProvider.h>

#include <AknFontProviderSuppliedMetrics.h>

// CONSTANTS

enum TAknFontSpecificationLayoutFontFlags

	{

	EUseTypeface = 0

	};

// ============================ MEMBER FUNCTIONS ===============================

CAknFontSpecificationLayoutFont* CAknFontSpecificationLayoutFont::NewL( 

    CBitmapDevice& aScreenDevice, 

    const TAknFontSpecification& aSpec )

    {

    CAknFontSpecificationLayoutFont* self = 

        new (ELeave) CAknFontSpecificationLayoutFont( aScreenDevice, aSpec);

    CleanupStack::PushL(self);

    self->ConstructL();

    CleanupStack::Pop(); //self

    return self;

    }

CAknFontSpecificationLayoutFont* CAknFontSpecificationLayoutFont::NewL( 

    CBitmapDevice& aScreenDevice, 

    const TTypeface& aTypeface,

    const TAknFontSpecification& aSpec )

    {

	CAknFontSpecificationLayoutFont* self = 

        new (ELeave) CAknFontSpecificationLayoutFont( aScreenDevice, aTypeface, aSpec);

	CleanupStack::PushL(self);

	self->ConstructL();

	CleanupStack::Pop(); //self

	return self;

    }

CAknFontSpecificationLayoutFont::~CAknFontSpecificationLayoutFont()

    {

    }

void CAknFontSpecificationLayoutFont::ConstructL()

    {

    CAknLayoutFont::Update();

    }

/** 

* Implementation of the framework method for this class

*

*/

CFbsFont* CAknFontSpecificationLayoutFont::SupplyFont()

    {

    TAknFontProviderSuppliedMetrics info;

    CFbsFont* font;

    // Use Font provisioning.

    if ( iFlags[EUseTypeface] )

        {       

        font = AknFontProvider::CreateFontFromTypefaceAndMetrics( BitmapDevice(), iTypeface, iSpec, info, iFontProviderId );

        }

    else

        {

        // Use category matching. There is no ID

        font = AknFontProvider::CreateFontFromMetrics( BitmapDevice(), 0, iSpec, info, iFontProviderId );       

        }

    SetExcessAscent( info.ExcessAscent() );

    SetExcessDescent( info.ExcessDescent() );

    SetBottomShortfall( info.MaxDescentToTextPaneBottom() );

    return font;

    }

TAknTextDecorationMetrics CAknFontSpecificationLayoutFont::DoTextDecorationMetrics() const

    {

    return TAknTextDecorationMetrics( iSpec );

    }

TAknFontSpecification CAknFontSpecificationLayoutFont::DoFontSpecification() const

    {

    return TAknFontSpecification( iSpec );

    }

TInt CAknFontSpecificationLayoutFont::DoAscentForCharacter( TChar aCharacter ) const

    {

    TInt ascent = AscentInPixels();

    if ( AknFontProvider::HasBaselineCorrection( iFontProviderId ) )

        {

        TInt baselineLift;

        TInt denominatorIfFractional;

        TInt err = AknFontProvider::BaselineDeltaForCharacter( iFontProviderId, 

                                                     aCharacter, 

                                                     baselineLift, 

                                                     denominatorIfFractional );

        if ( err == KErrNone )

            {

            if ( denominatorIfFractional > 0)

                {

                ascent -= ( baselineLift * ascent ) / denominatorIfFractional;

                }

            else

                {

                ascent -= baselineLift;

                }

            }

        }

    __ASSERT_DEBUG( ascent > 0, Panic( EAknPanicInvalidValue ) );

    return ascent;

    }

/**

* C++ Constructors.

*/

CAknFontSpecificationLayoutFont::CAknFontSpecificationLayoutFont( 

    CBitmapDevice& aScreenDevice, 

    const TTypeface& aTypeface, 

    const TAknFontSpecification& aSpec ) : 

    CAknLayoutFont(aScreenDevice), iSpec(aSpec), iTypeface(aTypeface) 

    {

    // When constructed from typeface and metrics, the typeface information replaces the role of category

    // completely. Set it to "undefined"

    iSpec.SetFontCategory( EAknFontCategoryUndefined);

    iFlags.Set(EUseTypeface);    

    // Keep versions of text pane height in step

    __ASSERT_ALWAYS(iSpec.Units() == TAknFontSpecification::EPixels, Panic(EAknPanicInconsistentUnits) );

    SetTextPaneHeight( iSpec.TextPaneHeight() );

    }

CAknFontSpecificationLayoutFont::CAknFontSpecificationLayoutFont( 

    CBitmapDevice& aScreenDevice, 

    const TAknFontSpecification& aSpec) : 

    CAknLayoutFont(aScreenDevice), iSpec(aSpec) 

    {

    // Keep versions of text pane height in step

    __ASSERT_ALWAYS(iSpec.Units() == TAknFontSpecification::EPixels, Panic(EAknPanicInconsistentUnits) );

    SetTextPaneHeight( iSpec.TextPaneHeight() ); 

    }

void CAknFontSpecificationLayoutFont::Reserved_1()

    {}

//  End of File