/* -*- 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 <sal/config.h>

#include <comphelper/configuration.hxx>

#include <drawinglayer/primitive2d/BufferedDecompositionPrimitive2D.hxx>

#include <drawinglayer/primitive2d/BufferedDecompositionFlusher.hxx>

namespace drawinglayer::primitive2d

{

bool BufferedDecompositionPrimitive2D::hasBuffered2DDecomposition() const

{

    if (!mbFlushOnTimer)

        return maBuffered2DDecomposition.is();

    else

    {

        std::lock_guard Guard(maCallbackLock);

        return maBuffered2DDecomposition.is();

    }

}

void BufferedDecompositionPrimitive2D::setBuffered2DDecomposition(Primitive2DReference rNew)

{

    if (!mbFlushOnTimer)

    {

        // no flush used, just set

        maBuffered2DDecomposition = std::move(rNew);

    }

    else

    {

        // decomposition changed, touch

        maLastAccess = std::chrono::steady_clock::now();

        BufferedDecompositionFlusher::update(this);

        // tdf#158913 need to secure change when flush/multithreading is in use

        std::lock_guard Guard(maCallbackLock);

        maBuffered2DDecomposition = std::move(rNew);

    }

}

BufferedDecompositionPrimitive2D::BufferedDecompositionPrimitive2D()

    : maBuffered2DDecomposition()

    , maCallbackLock()

    , mbFlushOnTimer(false)

{

}

BufferedDecompositionPrimitive2D::~BufferedDecompositionPrimitive2D()

{

    if (mbFlushOnTimer)

        BufferedDecompositionFlusher::remove(this);

}

void BufferedDecompositionPrimitive2D::get2DDecomposition(

    Primitive2DDecompositionVisitor& rVisitor,

    const geometry::ViewInformation2D& rViewInformation) const

{

    if (!mbFlushOnTimer)

    {

        // no flush/multithreading is in use, just call

        if (!maBuffered2DDecomposition)

            maBuffered2DDecomposition = create2DDecomposition(rViewInformation);

        rVisitor.visit(maBuffered2DDecomposition);

    }

    else

    {

        // tdf#158913 need to secure 'visit' when flush/multithreading is in use,

        // so that the local non-ref-Counted instance of the decomposition gets not

        // manipulated (e.g. deleted)

        Primitive2DReference xTmp;

        {

            maLastAccess = std::chrono::steady_clock::now();

            // only hold the lock for long enough to get a valid reference

            std::lock_guard Guard(maCallbackLock);

            if (!maBuffered2DDecomposition)

            {

                maBuffered2DDecomposition = create2DDecomposition(rViewInformation);

                BufferedDecompositionFlusher::update(this);

            }

            xTmp = maBuffered2DDecomposition;

        }

        rVisitor.visit(xTmp);

    }

}

void BufferedDecompositionPrimitive2D::activateFlushOnTimer()

{

    if (comphelper::IsFuzzing())

        return;

    mbFlushOnTimer = true;

}

} // end of namespace drawinglayer::primitive2d

/* vim:set shiftwidth=4 softtabstop=4 expandtab: */