/* -*- 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 <com/sun/star/animations/AnimationColorSpace.hpp>

#include <coloranimation.hxx>
#include <hslcoloranimation.hxx>
#include "animationcolornode.hxx"
#include <animationfactory.hxx>
#include <activitiesfactory.hxx>

using namespace com::sun::star;

namespace slideshow::internal {

namespace {
/** Little wrapper for HSL to RGB mapping.

    This class implements the HSLColorAnimation interface,
    internally converting to RGB and forwarding to
    ColorAnimation.
*/
class HSLWrapper : public HSLColorAnimation
{
public:
    explicit HSLWrapper( const ColorAnimationSharedPtr& rAnimation )
        : mpAnimation( rAnimation )
    {
        ENSURE_OR_THROW(
            mpAnimation,
            "HSLWrapper::HSLWrapper(): Invalid color animation delegate" );
    }

    virtual void prefetch() override
    {}

    virtual void start( const AnimatableShapeSharedPtr&     rShape,
                        const ShapeAttributeLayerSharedPtr& rAttrLayer ) override
    {
        mpAnimation->start( rShape, rAttrLayer );
    }

    virtual void end() override
    {
        mpAnimation->end();
    }

    virtual bool operator()( const HSLColor& rColor ) override
    {
        return (*mpAnimation)( RGBColor( rColor ) );
    }

    virtual HSLColor getUnderlyingValue() const override
    {
        return HSLColor( mpAnimation->getUnderlyingValue() );
    }

private:
    ColorAnimationSharedPtr mpAnimation;
};

} // anon namespace

AnimationActivitySharedPtr AnimationColorNode::createActivity() const
{
    ActivitiesFactory::CommonParameters aParms( fillCommonParameters() );

    switch( mxColorNode->getColorInterpolation() )
    {
    case animations::AnimationColorSpace::RGB:
        return ActivitiesFactory::createAnimateActivity(
            aParms,
            AnimationFactory::createColorPropertyAnimation(
                mxColorNode->getAttributeName(),
                getShape(),
                getContext().mpSubsettableShapeManager,
                getSlideSize() ),
            getXAnimateNode() );

    case animations::AnimationColorSpace::HSL:
        // Wrap a plain ColorAnimation with the HSL
        // wrapper, which implements the HSLColorAnimation
        // interface, and internally converts HSL to RGB color
        return ActivitiesFactory::createAnimateActivity(
            aParms,
            std::make_shared<HSLWrapper>(
                    AnimationFactory::createColorPropertyAnimation(
                        mxColorNode->getAttributeName(),
                        getShape(),
                        getContext().mpSubsettableShapeManager,
                        getSlideSize() )),
            mxColorNode );

    default:
        ENSURE_OR_THROW( false, "AnimationColorNode::createColorActivity(): "
                          "Unexpected color space" );
    }

    return AnimationActivitySharedPtr();
}

} // namespace slideshow::internal

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