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

#include <svx/sdr/contact/viewcontactofvirtobj.hxx>
#include <svx/svdovirt.hxx>
#include <basegfx/matrix/b2dhommatrix.hxx>
#include <drawinglayer/primitive2d/transformprimitive2d.hxx>
#include <drawinglayer/primitive2d/sdrdecompositiontools2d.hxx>

namespace sdr::contact {

ViewContactOfVirtObj::ViewContactOfVirtObj(SdrVirtObj& rObj)
:   ViewContactOfSdrObj(rObj)
{
}

ViewContactOfVirtObj::~ViewContactOfVirtObj()
{
}

SdrVirtObj& ViewContactOfVirtObj::GetVirtObj() const
{
    return static_cast<SdrVirtObj&>(mrObject);
}

// Access to possible sub-hierarchy
sal_uInt32 ViewContactOfVirtObj::GetObjectCount() const
{
    // Here, SdrVirtObj's need to return 0L to show that they have no
    // sub-hierarchy, even when they are group objects. This is necessary
    // to avoid that the same VOCs will be added to the draw hierarchy
    // twice which leads to problems.

    // This solution is only a first solution to get things running. Later
    // this needs to be replaced with creating real VOCs for the objects
    // referenced by virtual objects to avoid the 'trick' of setting the
    // offset for painting at the destination OutputDevice.

    // As can be seen, with primitives, the problem will be solved using
    // a transformPrimitive, so this solution can stay with primitives.
    return 0;
}

void ViewContactOfVirtObj::createViewIndependentPrimitive2DSequence(drawinglayer::primitive2d::Primitive2DDecompositionVisitor& rVisitor) const
{
    // create displacement transformation if we have content
    basegfx::B2DHomMatrix aObjectMatrix;
    Point aAnchor(GetVirtObj().GetAnchorPos());

    if(aAnchor.X() || aAnchor.Y())
    {
        aObjectMatrix.set(0, 2, aAnchor.X());
        aObjectMatrix.set(1, 2, aAnchor.Y());
    }

    // use method from referenced object to get the Primitive2DContainer
    drawinglayer::primitive2d::Primitive2DContainer xSequenceVirtual;
    GetVirtObj().GetReferencedObj().GetViewContact().getViewIndependentPrimitive2DContainer(xSequenceVirtual);

    if(!xSequenceVirtual.empty())
    {
        // create transform primitive
        drawinglayer::primitive2d::Primitive2DReference xReference(
            new drawinglayer::primitive2d::TransformPrimitive2D(
                aObjectMatrix,
                drawinglayer::primitive2d::Primitive2DContainer(xSequenceVirtual)));

        rVisitor.visit(xReference);
    }
    else
    {
        // always append an invisible outline for the cases where no visible content exists
        const drawinglayer::primitive2d::Primitive2DReference xReference(
            drawinglayer::primitive2d::createHiddenGeometryPrimitives2D(
                aObjectMatrix));

        rVisitor.visit(xReference);
    }
}

}

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