/* -*- 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 .

 */

#pragma once

#include <drawinglayer/primitive2d/groupprimitive2d.hxx>

#include <basegfx/matrix/b2dhommatrix.hxx>

namespace drawinglayer::primitive2d

    {

        /** CropPrimitive2D class

            Caution: Due to old constraints (old core definitions) the

            crop distances describe how the uncropped content is defined

            relative to the current object size. This means that maTransformation

            describes the current object size (the part of the object visible

            with the crop applied). To get the original size and orientation

            of the uncropped content it is necessary to calc back from the

            current situation (maTransformation) using the crop values

            to get to the uncropped original content.

            Thus a transformation has to be calculated which will be applied

            to the already existing content to get it to the uncropped state

            and then this is masked with the current state (mask polygon

            created from unit polygon and maTransformation).

            At least in this primitive the units of the crop values are

            already in the local coordinate system; in the core these distances

            are defined relative to the object content size (PrefMapMode

            and PrefSize of the content)...

            Of course this is a primitive, so feel free to just ignore all that

            stuff and use the automatically generated decomposition. Sigh.

        */

        class CropPrimitive2D final : public GroupPrimitive2D

        {

        private:

            // the transformation already applied to the child geometry

            basegfx::B2DHomMatrix           maTransformation;

            // the crop offsets relative to the range of the unrotated content

            double                          mfCropLeft;

            double                          mfCropTop;

            double                          mfCropRight;

            double                          mfCropBottom;

        public:

            /// constructor

            CropPrimitive2D(

                Primitive2DContainer&& aChildren,

                basegfx::B2DHomMatrix aTransformation,

                double fCropLeft,

                double fCropTop,

                double fCropRight,

                double fCropBottom);

            /// data read access

            const basegfx::B2DHomMatrix& getTransformation() const { return maTransformation; }

            double getCropLeft() const { return mfCropLeft; }

            double getCropTop() const { return mfCropTop; }

            double getCropRight() const { return mfCropRight; }

            double getCropBottom() const { return mfCropBottom; }

            /// compare operator

            virtual bool operator==(const BasePrimitive2D& rPrimitive) const override;

            /// local decomposition

            virtual void get2DDecomposition(Primitive2DDecompositionVisitor& rVisitor, const geometry::ViewInformation2D& rViewInformation) const override;

            /// provide unique ID

            virtual sal_uInt32 getPrimitive2DID() const override;

        };

} // end of namespace drawinglayer::primitive2d

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