/*

* Copyright (c) 2004 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:  A scaleable font with layout API

*

*/

// INCLUDE FILES

#include <w32std.h>

#include "AknLayoutFont.h"

#include <AknFontSpecification.h>

#include <aknenv.h>

#include "AknFontRegistry.h"

// CONSTANTS

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

/**

* C++ Constructor.

*/

CAknLayoutFont::CAknLayoutFont( CBitmapDevice& aScreenDevice ) : 

    CFbsFont(), iScreenDevice(aScreenDevice)

    {

    Register();

    }

CAknLayoutFont::~CAknLayoutFont()

    {

    Deregister();

    iScreenDevice.ReleaseFont(iNonDynamicFont);

    }  

EXPORT_C void CAknLayoutFont::Update()

    {

    CFbsFont* newNonDynamicFont = NULL;

    // Ask concrete type for a font

    TRAPD(err, newNonDynamicFont = SupplyFont());

    if (err == KErrNone)

        {

        // Release the old 'real' font ...

        iScreenDevice.ReleaseFont(iNonDynamicFont);

        // Copy this new font into the current object 

        iNonDynamicFont = newNonDynamicFont;

        (void) Duplicate( iNonDynamicFont->Handle() );

        }

    }

EXPORT_C TInt CAknLayoutFont::MaxAscent() const

    {

    return iExcessAscent + AscentInPixels();

    }

EXPORT_C TInt CAknLayoutFont::MaxDescent() const

    {

    return iExcessDescent + DescentInPixels();

    }

EXPORT_C TInt CAknLayoutFont::TextPaneTopToBaseline() const

    {

    return iTextPaneHeight - BaselineToTextPaneBottom();

    }

EXPORT_C TInt CAknLayoutFont::BaselineToTextPaneBottom() const

    {

    return ( iBottomShortfall + MaxDescent() );

    }

EXPORT_C TInt CAknLayoutFont::TextPaneHeight() const

    {

    return iTextPaneHeight;

    }

void CAknLayoutFont::SetExcessAscent( TInt aExcessAscent )

    {

    iExcessAscent = aExcessAscent;

    }

void CAknLayoutFont::SetExcessDescent( TInt aExcessDescent )

    {

    iExcessDescent = aExcessDescent;

    }

void CAknLayoutFont::SetBottomShortfall( TInt aBottomShortfall )

    {

    iBottomShortfall = aBottomShortfall;

    }

void CAknLayoutFont::SetTextPaneHeight( TInt aTextPaneHeight )

    {

    iTextPaneHeight = aTextPaneHeight;

    }

TInt CAknLayoutFont::AscentForCharacter( TChar aCharacter ) const

    {

    return DoAscentForCharacter( aCharacter );

    }

TInt CAknLayoutFont::DoAscentForCharacter( TChar /*aCharacter*/ ) const

    {

    // Default implementation. 

    return AscentInPixels();

    }

EXPORT_C const CAknLayoutFont* CAknLayoutFont::AsCAknLayoutFontOrNull( const CFont* aFont )

    {

    const CAknLayoutFont* layoutFontOrNull = NULL;

    if ( AVKONENV->FontRegistry().IsRegistered( aFont ) )

        {

        layoutFontOrNull = static_cast<const CAknLayoutFont*>( aFont );

        }

    return layoutFontOrNull;

    }

EXPORT_C TAknTextDecorationMetrics CAknLayoutFont::TextDecorationMetrics() const

    {

    return DoTextDecorationMetrics();

    }

EXPORT_C TAknFontSpecification CAknLayoutFont::FontSpecification() const

    {

    return DoFontSpecification();

    }

void CAknLayoutFont::Register()

    {

    AVKONENV->FontRegistry().RegisterFont( this );

    }

void CAknLayoutFont::Deregister()

    {

    AVKONENV->FontRegistry().DeRegisterFont( this );

    }

void CAknLayoutFont::CAknLayoutFont_Reserved_1()

    {}

EXPORT_C TAknFontCategory CAknLayoutFont::FontCategory() const

    {

    TAknFontSpecification spec = FontSpecification();

    return spec.FontCategory();

    }

TFontSpec CAknLayoutFont::DoFontSpecInTwips() const

    {

    // Implementation should be (prior to the iHeight patching at the end):

    //    TFontSpec fontSpec = CFbsFont::DoFontSpecInTwips(); currently private

    // So for now, have copied implementation from CFbsFont:

    TFontSpec fontSpec;

    if (!iHandle)

        return fontSpec;

    fontSpec = Address()->FontSpecInTwips();    

    // Patch up the iHeight for the correct device's twips/pixel ratio

    fontSpec.iHeight = iScreenDevice.VerticalPixelsToTwips( HeightInPixels() );   

    return fontSpec;

    }

CBitmapDevice& CAknLayoutFont::BitmapDevice() const

    {

    return iScreenDevice;

    }

//  End of File