/* -*- 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 <svx/sdr/animation/animationstate.hxx>

#include <svx/sdr/contact/viewobjectcontact.hxx>

#include <svx/sdr/animation/objectanimator.hxx>

#include <svx/sdr/contact/objectcontact.hxx>

#include <drawinglayer/primitive2d/animatedprimitive2d.hxx>

#include <drawinglayer/animation/animationtiming.hxx>

#include <comphelper/lok.hxx>

namespace sdr::animation

{

        double PrimitiveAnimation::getSmallestNextTime(double fCurrentTime)

        {

            double fRetval(0.0);

            if(!maAnimatedPrimitives.empty())

            {

                for(const drawinglayer::primitive2d::Primitive2DReference & xRef : maAnimatedPrimitives)

                {

                    const drawinglayer::primitive2d::AnimatedSwitchPrimitive2D* pCandidate = static_cast< const drawinglayer::primitive2d::AnimatedSwitchPrimitive2D* >(xRef.get());

                    const drawinglayer::animation::AnimationEntry& rAnimEntry = pCandidate->getAnimationEntry();

                    const double fNextTime(rAnimEntry.getNextEventTime(fCurrentTime));

                    if(!::basegfx::fTools::equalZero(fNextTime))

                    {

                        if(::basegfx::fTools::equalZero(fRetval))

                        {

                            fRetval = fNextTime;

                        }

                        else if(::basegfx::fTools::less(fNextTime, fRetval))

                        {

                            fRetval = fNextTime;

                        }

                    }

                }

            }

            return fRetval;

        }

        void PrimitiveAnimation::prepareNextEvent()

        {

            const double fCurrentTime(mrVOContact.GetObjectContact().getPrimitiveAnimator().GetTime());

            const double fNextTime(getSmallestNextTime(fCurrentTime));

            // getSmallestNextTime will be zero when animation ended. If not zero, a next step

            // exists

            if(::basegfx::fTools::equalZero(fNextTime))

                return;

            // next time point exists, use it

            sal_uInt32 nNextTime;

            if(fNextTime >= double(0xffffff00))

            {

                // take care for very late points in time, e.g. when a text animation stops

                // in a defined AnimationEntryFixed with endless (0xffffffff) duration

                nNextTime = GetTime() + (1000 * 60 * 60); // one hour, works with vcl timers, 0xffffff00 was too much...

            }

            else

            {

                nNextTime = static_cast<sal_uInt32>(fNextTime);

            }

            // ensure step forward in integer timing, the floating step difference maybe smaller than 1.0. Use

            // at least 25ms for next step

            const sal_uInt32 nMinimumStepTime(static_cast<sal_uInt32>(fCurrentTime) + 25);

            if(nNextTime <= nMinimumStepTime)

            {

                nNextTime = nMinimumStepTime;

            }

            // set time and reactivate by re-adding to the scheduler

            SetTime(nNextTime);

            mrVOContact.GetObjectContact().getPrimitiveAnimator().InsertEvent(*this);

        }

        PrimitiveAnimation::PrimitiveAnimation(sdr::contact::ViewObjectContact& rVOContact, drawinglayer::primitive2d::Primitive2DContainer&& rAnimatedPrimitives)

        :   mrVOContact(rVOContact),

            maAnimatedPrimitives(std::move(rAnimatedPrimitives))

        {

            if (!comphelper::LibreOfficeKit::isActive())

                // setup initially

                prepareNextEvent();

        }

        PrimitiveAnimation::~PrimitiveAnimation()

        {

            // ensure that Event member is removed from PrimitiveAnimator

            mrVOContact.GetObjectContact().getPrimitiveAnimator().RemoveEvent(this);

        }

        // execute event, from base class Event

        void PrimitiveAnimation::Trigger(sal_uInt32 /*nTime*/)

        {

            // schedule a repaint of associated object

            mrVOContact.ActionChanged();

            if (!comphelper::LibreOfficeKit::isActive())

                // re-setup

                prepareNextEvent();

        }

} // end of namespace

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