/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */

/*

 * This file is part of the LibreOffice project.

 *

 * This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/.

 *

 * This file incorporates work covered by the following license notice:

 *

 *   Licensed to the Apache Software Foundation (ASF) under one or more

 *   contributor license agreements. See the NOTICE file distributed

 *   with this work for additional information regarding copyright

 *   ownership. The ASF licenses this file to you under the Apache

 *   License, Version 2.0 (the "License"); you may not use this file

 *   except in compliance with the License. You may obtain a copy of

 *   the License at http://www.apache.org/licenses/LICENSE-2.0 .

 */

#include <tools/stream.hxx>

#include <tools/vcompat.hxx>

#include <vcl/bitmap.hxx>

#include <vcl/gradient.hxx>

#include <vcl/wall.hxx>

#include <vcl/svapp.hxx>

#include <vcl/dibtools.hxx>

#include <vcl/settings.hxx>

#include <vcl/TypeSerializer.hxx>

#include <com/sun/star/awt/GradientStyle.hpp>

SvStream& ReadWallpaper( SvStream& rIStm, Wallpaper& rImplWallpaper )

{

    VersionCompatRead  aCompat(rIStm);

    rImplWallpaper.maRect.SetEmpty();

    rImplWallpaper.mpGradient.reset();

    rImplWallpaper.maBitmap.SetEmpty();

    // version 1

    TypeSerializer aSerializer(rIStm);

    aSerializer.readColor(rImplWallpaper.maColor);

    sal_uInt16 nTmp16(0);

    rIStm.ReadUInt16(nTmp16);

    rImplWallpaper.meStyle = static_cast<WallpaperStyle>(nTmp16);

    // version 2

    if( aCompat.GetVersion() >= 2 )

    {

        bool bRect(false), bGrad(false), bBmp(false), bDummy;

        rIStm.ReadCharAsBool( bRect ).ReadCharAsBool( bGrad ).ReadCharAsBool( bBmp ).ReadCharAsBool( bDummy ).ReadCharAsBool( bDummy ).ReadCharAsBool( bDummy );

        if( bRect )

        {

            rImplWallpaper.maRect = tools::Rectangle();

            aSerializer.readRectangle(rImplWallpaper.maRect);

        }

        if( bGrad )

        {

            rImplWallpaper.mpGradient.emplace();

            aSerializer.readGradient(*rImplWallpaper.mpGradient);

        }

        if( bBmp )

        {

            rImplWallpaper.maBitmap.SetEmpty();

            ReadDIBBitmapEx(rImplWallpaper.maBitmap, rIStm);

        }

        // version 3 (new color format)

        if( aCompat.GetVersion() >= 3 )

        {

            sal_uInt32 nTmp;

            rIStm.ReadUInt32(nTmp);

            rImplWallpaper.maColor = ::Color(ColorTransparency, nTmp);

        }

    }

    return rIStm;

}

SvStream& WriteWallpaper( SvStream& rOStm, const Wallpaper& rImplWallpaper )

{

    VersionCompatWrite aCompat(rOStm, 3);

    bool            bRect = !rImplWallpaper.maRect.IsEmpty();

    bool            bGrad = bool(rImplWallpaper.mpGradient);

    bool            bBmp = !rImplWallpaper.maBitmap.IsEmpty();

    bool            bDummy = false;

    // version 1

    TypeSerializer aSerializer(rOStm);

    aSerializer.writeColor(rImplWallpaper.maColor);

    rOStm.WriteUInt16( static_cast<sal_uInt16>(rImplWallpaper.meStyle) );

    // version 2

    rOStm.WriteBool( bRect ).WriteBool( bGrad ).WriteBool( bBmp ).WriteBool( bDummy ).WriteBool( bDummy ).WriteBool( bDummy );

    if( bRect )

    {

        aSerializer.writeRectangle(rImplWallpaper.maRect);

    }

    if (bGrad)

    {

        aSerializer.writeGradient(*rImplWallpaper.mpGradient);

    }

    if( bBmp )

        WriteDIBBitmapEx(rImplWallpaper.maBitmap, rOStm);

    // version 3 (new color format)

    rOStm.WriteUInt32(static_cast<sal_uInt32>(rImplWallpaper.maColor));

    return rOStm;

}

Wallpaper::Wallpaper() :

    maColor( COL_TRANSPARENT ), meStyle( WallpaperStyle::NONE )

{

}

Wallpaper::Wallpaper( const Wallpaper& ) = default;

Wallpaper::Wallpaper( Wallpaper&& ) = default;

Wallpaper::Wallpaper( const Color& rColor )

{

    maColor    = rColor;

    meStyle    = WallpaperStyle::Tile;

}

Wallpaper::Wallpaper( const Bitmap& rBmp )

{

    maBitmap   = rBmp;

    meStyle    = WallpaperStyle::Tile;

}

Wallpaper::~Wallpaper() = default;

void Wallpaper::ImplSetCachedBitmap( const Bitmap& rBmp ) const

{

    maCache = rBmp;

}

const Bitmap* Wallpaper::ImplGetCachedBitmap() const

{

    return maCache.IsEmpty() ? nullptr : &maCache;

}

void Wallpaper::ImplReleaseCachedBitmap() const

{

    maCache.SetEmpty();

}

void Wallpaper::SetColor( const Color& rColor )

{

    maCache.SetEmpty();

    maColor = rColor;

    if( WallpaperStyle::NONE == meStyle || WallpaperStyle::ApplicationGradient == meStyle )

        meStyle = WallpaperStyle::Tile;

}

void Wallpaper::SetStyle( WallpaperStyle eStyle )

{

    if( eStyle == WallpaperStyle::ApplicationGradient )

        // set a dummy gradient, the correct gradient

        // will be created dynamically in GetGradient()

        SetGradient( ImplGetApplicationGradient() );

    meStyle = eStyle;

}

void Wallpaper::SetBitmap( const Bitmap& rBitmap )

{

    maCache.SetEmpty();

    maBitmap = rBitmap;

    if( WallpaperStyle::NONE == meStyle || WallpaperStyle::ApplicationGradient == meStyle)

        meStyle = WallpaperStyle::Tile;

}

const Bitmap & Wallpaper::GetBitmap() const

{

    return maBitmap;

}

bool Wallpaper::IsBitmap() const

{

    return !maBitmap.IsEmpty();

}

void Wallpaper::SetGradient( const Gradient& rGradient )

{

    maCache.SetEmpty();

    mpGradient = rGradient;

    if( WallpaperStyle::NONE == meStyle || WallpaperStyle::ApplicationGradient == meStyle )

        meStyle = WallpaperStyle::Tile;

}

Gradient Wallpaper::GetGradient() const

{

    if( WallpaperStyle::ApplicationGradient == meStyle )

        return ImplGetApplicationGradient();

    else if ( mpGradient )

        return *mpGradient;

    else

        return Gradient();

}

bool Wallpaper::IsGradient() const

{

    return bool(mpGradient);

}

Gradient Wallpaper::ImplGetApplicationGradient()

{

    Gradient g;

    g.SetAngle( 900_deg10 );

    g.SetStyle( css::awt::GradientStyle_LINEAR );

    g.SetStartColor( Application::GetSettings().GetStyleSettings().GetFaceColor() );

    // no 'extreme' gradient when high contrast

    if( Application::GetSettings().GetStyleSettings().GetHighContrastMode() )

        g.SetEndColor( Application::GetSettings().GetStyleSettings().GetFaceColor() );

    else

        g.SetEndColor( Application::GetSettings().GetStyleSettings().GetFaceGradientColor() );

    return g;

}

bool Wallpaper::IsRect() const

{

    return !maRect.IsEmpty();

}

bool Wallpaper::IsFixed() const

{

    if ( meStyle == WallpaperStyle::NONE )

        return false;

    else

        return (maBitmap.IsEmpty() && !mpGradient);

}

bool Wallpaper::IsScrollable() const

{

    if ( meStyle == WallpaperStyle::NONE )

        return false;

    else if ( maBitmap.IsEmpty() && !mpGradient )

        return true;

    else if ( !maBitmap.IsEmpty() )

        return (meStyle == WallpaperStyle::Tile);

    else

        return false;

}

Wallpaper& Wallpaper::operator=( const Wallpaper& ) = default;

Wallpaper& Wallpaper::operator=( Wallpaper&& ) = default;

bool Wallpaper::operator==( const Wallpaper& rOther ) const

{

    return meStyle == rOther.meStyle &&

        maColor == rOther.maColor &&

        maRect == rOther.maRect &&

        maBitmap == rOther.maBitmap &&

        mpGradient == rOther.mpGradient;

}

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