split TextAsPolygonExtractor2D for more general reuse

Change-Id: I102ccab2a423c38b0414c9565fec349aa6ffb5af
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/163725
Tested-by: Jenkins
Reviewed-by: Caolán McNamara <caolan.mcnamara@collabora.com>
diff --git a/drawinglayer/Library_drawinglayer.mk b/drawinglayer/Library_drawinglayer.mk
index bb36fc2..e5c0248 100644
--- a/drawinglayer/Library_drawinglayer.mk
+++ b/drawinglayer/Library_drawinglayer.mk
@@ -193,6 +193,7 @@ $(eval $(call gb_Library_add_exception_objects,drawinglayer,\
    drawinglayer/source/processor2d/hittestprocessor2d \
    drawinglayer/source/processor2d/linegeometryextractor2d \
    drawinglayer/source/processor2d/objectinfoextractor2d \
    drawinglayer/source/processor2d/textextractor2d \
    drawinglayer/source/processor2d/textaspolygonextractor2d \
    drawinglayer/source/processor2d/vclhelperbufferdevice \
    drawinglayer/source/processor2d/vclmetafileprocessor2d \
diff --git a/drawinglayer/source/processor2d/textaspolygonextractor2d.cxx b/drawinglayer/source/processor2d/textaspolygonextractor2d.cxx
index c98fae6..1a091d0 100644
--- a/drawinglayer/source/processor2d/textaspolygonextractor2d.cxx
+++ b/drawinglayer/source/processor2d/textaspolygonextractor2d.cxx
@@ -28,56 +28,47 @@

namespace drawinglayer::processor2d
{
        void TextAsPolygonExtractor2D::processTextPrimitive2D(const primitive2d::BasePrimitive2D& rCandidate)
        {
            // PRIMITIVE2D_ID_TEXTDECORATEDPORTIONPRIMITIVE2D
            // TextDecoratedPortionPrimitive2D can produce the following primitives
            // when being decomposed:
            //
            // - TextSimplePortionPrimitive2D
            // - PolygonWavePrimitive2D
            //      - PolygonStrokePrimitive2D
            // - PolygonStrokePrimitive2D
            //      - PolyPolygonColorPrimitive2D
            //      - PolyPolygonHairlinePrimitive2D
            //          - PolygonHairlinePrimitive2D
            // - ShadowPrimitive2D
            //      - ModifiedColorPrimitive2D
            //      - TransformPrimitive2D
            // - TextEffectPrimitive2D
            //      - ModifiedColorPrimitive2D
            //      - TransformPrimitive2D
            //      - GroupPrimitive2D

            // PRIMITIVE2D_ID_TEXTSIMPLEPORTIONPRIMITIVE2D
            // TextSimplePortionPrimitive2D can produce the following primitives
            // when being decomposed:
            //
            // - PolyPolygonColorPrimitive2D
            // - TextEffectPrimitive2D
            //      - ModifiedColorPrimitive2D
            //      - TransformPrimitive2D
            //      - GroupPrimitive2D

            // encapsulate with flag and use decomposition
            mnInText++;
            process(rCandidate);
            mnInText--;
        }

        void TextAsPolygonExtractor2D::processBasePrimitive2D(const primitive2d::BasePrimitive2D& rCandidate)
        {
            switch(rCandidate.getPrimitive2DID())
            switch (rCandidate.getPrimitive2DID())
            {
                case PRIMITIVE2D_ID_TEXTDECORATEDPORTIONPRIMITIVE2D :
                {
                    // TextDecoratedPortionPrimitive2D can produce the following primitives
                    // when being decomposed:
                    //
                    // - TextSimplePortionPrimitive2D
                    // - PolygonWavePrimitive2D
                    //      - PolygonStrokePrimitive2D
                    // - PolygonStrokePrimitive2D
                    //      - PolyPolygonColorPrimitive2D
                    //      - PolyPolygonHairlinePrimitive2D
                    //          - PolygonHairlinePrimitive2D
                    // - ShadowPrimitive2D
                    //      - ModifiedColorPrimitive2D
                    //      - TransformPrimitive2D
                    // - TextEffectPrimitive2D
                    //      - ModifiedColorPrimitive2D
                    //      - TransformPrimitive2D
                    //      - GroupPrimitive2D

                    // encapsulate with flag and use decomposition
                    mnInText++;
                    process(rCandidate);
                    mnInText--;

                    break;
                }
                case PRIMITIVE2D_ID_TEXTSIMPLEPORTIONPRIMITIVE2D :
                {
                    // TextSimplePortionPrimitive2D can produce the following primitives
                    // when being decomposed:
                    //
                    // - PolyPolygonColorPrimitive2D
                    // - TextEffectPrimitive2D
                    //      - ModifiedColorPrimitive2D
                    //      - TransformPrimitive2D
                    //      - GroupPrimitive2D

                    // encapsulate with flag and use decomposition
                    mnInText++;
                    process(rCandidate);
                    mnInText--;

                    break;
                }

                // as can be seen from the TextSimplePortionPrimitive2D and the
                // TextDecoratedPortionPrimitive2D, inside of the mnInText marks
                // the following primitives can occur containing geometry data
@@ -190,29 +181,14 @@ namespace drawinglayer::processor2d
                    break;
                }

                // ignorable primitives
                case PRIMITIVE2D_ID_SCENEPRIMITIVE2D :
                case PRIMITIVE2D_ID_WRONGSPELLPRIMITIVE2D :
                case PRIMITIVE2D_ID_MARKERARRAYPRIMITIVE2D :
                case PRIMITIVE2D_ID_POINTARRAYPRIMITIVE2D :
                case PRIMITIVE2D_ID_BITMAPPRIMITIVE2D :
                case PRIMITIVE2D_ID_METAFILEPRIMITIVE2D :
                case PRIMITIVE2D_ID_MASKPRIMITIVE2D :
                {
                default:
                    TextExtractor2D::processBasePrimitive2D(rCandidate);
                    break;
                }

                default :
                {
                    // process recursively
                    process(rCandidate);
                    break;
                }
            }
        }

        TextAsPolygonExtractor2D::TextAsPolygonExtractor2D(const geometry::ViewInformation2D& rViewInformation)
        :   BaseProcessor2D(rViewInformation),
        :   TextExtractor2D(rViewInformation),
            maBColorModifierStack(),
            mnInText(0)
        {
diff --git a/drawinglayer/source/processor2d/textextractor2d.cxx b/drawinglayer/source/processor2d/textextractor2d.cxx
new file mode 100644
index 0000000..105014a
--- /dev/null
+++ b/drawinglayer/source/processor2d/textextractor2d.cxx
@@ -0,0 +1,88 @@
/* -*- 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 <drawinglayer/processor2d/textextractor2d.hxx>
#include <drawinglayer/primitive2d/drawinglayer_primitivetypes2d.hxx>
#include <drawinglayer/primitive2d/transformprimitive2d.hxx>

namespace drawinglayer::processor2d
{
void TextExtractor2D::processBasePrimitive2D(const primitive2d::BasePrimitive2D& rCandidate)
{
    switch (rCandidate.getPrimitive2DID())
    {
        case PRIMITIVE2D_ID_TEXTDECORATEDPORTIONPRIMITIVE2D:
        case PRIMITIVE2D_ID_TEXTSIMPLEPORTIONPRIMITIVE2D:
        {
            processTextPrimitive2D(rCandidate);
            break;
        }

        // usage of transformation stack is needed
        case PRIMITIVE2D_ID_TRANSFORMPRIMITIVE2D:
        {
            // remember current transformation and ViewInformation
            const primitive2d::TransformPrimitive2D& rTransformCandidate(
                static_cast<const primitive2d::TransformPrimitive2D&>(rCandidate));
            const geometry::ViewInformation2D aLastViewInformation2D(getViewInformation2D());

            // create new transformations for CurrentTransformation and for local ViewInformation2D
            geometry::ViewInformation2D aViewInformation2D(getViewInformation2D());
            aViewInformation2D.setObjectTransformation(
                getViewInformation2D().getObjectTransformation()
                * rTransformCandidate.getTransformation());
            updateViewInformation(aViewInformation2D);

            // process content
            process(rTransformCandidate.getChildren());

            // restore transformations
            updateViewInformation(aLastViewInformation2D);

            break;
        }

        // ignorable primitives
        case PRIMITIVE2D_ID_SCENEPRIMITIVE2D:
        case PRIMITIVE2D_ID_WRONGSPELLPRIMITIVE2D:
        case PRIMITIVE2D_ID_MARKERARRAYPRIMITIVE2D:
        case PRIMITIVE2D_ID_POINTARRAYPRIMITIVE2D:
        case PRIMITIVE2D_ID_BITMAPPRIMITIVE2D:
        case PRIMITIVE2D_ID_METAFILEPRIMITIVE2D:
        case PRIMITIVE2D_ID_MASKPRIMITIVE2D:
            break;

        default:
        {
            // process recursively
            process(rCandidate);
            break;
        }
    }
}

TextExtractor2D::TextExtractor2D(const geometry::ViewInformation2D& rViewInformation)
    : BaseProcessor2D(rViewInformation)
{
}

TextExtractor2D::~TextExtractor2D() {}
} // end of namespace

/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/drawinglayer/processor2d/textaspolygonextractor2d.hxx b/include/drawinglayer/processor2d/textaspolygonextractor2d.hxx
index feaea11..a718977 100644
--- a/include/drawinglayer/processor2d/textaspolygonextractor2d.hxx
+++ b/include/drawinglayer/processor2d/textaspolygonextractor2d.hxx
@@ -22,7 +22,7 @@

#include <drawinglayer/drawinglayerdllapi.h>

#include <drawinglayer/processor2d/baseprocessor2d.hxx>
#include <drawinglayer/processor2d/textextractor2d.hxx>
#include <basegfx/polygon/b2dpolypolygon.hxx>
#include <basegfx/color/bcolor.hxx>
#include <basegfx/color/bcolormodifier.hxx>
@@ -64,7 +64,7 @@ namespace drawinglayer::processor2d

            This processor extracts text in the fed primitives to filled polygons
         */
        class DRAWINGLAYER_DLLPUBLIC TextAsPolygonExtractor2D final : public BaseProcessor2D
        class DRAWINGLAYER_DLLPUBLIC TextAsPolygonExtractor2D final : public TextExtractor2D
        {
        private:
            // extraction target
@@ -78,6 +78,7 @@ namespace drawinglayer::processor2d

            // tooling methods
            void processBasePrimitive2D(const primitive2d::BasePrimitive2D& rCandidate) override;
            void processTextPrimitive2D(const primitive2d::BasePrimitive2D& rCandidate) override;

        public:
            explicit TextAsPolygonExtractor2D(const geometry::ViewInformation2D& rViewInformation);
diff --git a/include/drawinglayer/processor2d/textextractor2d.hxx b/include/drawinglayer/processor2d/textextractor2d.hxx
new file mode 100644
index 0000000..8f68f7e
--- /dev/null
+++ b/include/drawinglayer/processor2d/textextractor2d.hxx
@@ -0,0 +1,33 @@
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
/*
 * 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/.
 */

#pragma once

#include <drawinglayer/drawinglayerdllapi.h>
#include <drawinglayer/processor2d/baseprocessor2d.hxx>

namespace drawinglayer::processor2d
{
/** TextExtractor2D class

        This processor extracts text in the fed primitives and calls
        processTextPrimitive2D for those while calling processBasePrimitive2D
        for everything else.
     */
class DRAWINGLAYER_DLLPUBLIC TextExtractor2D : public BaseProcessor2D
{
public:
    explicit TextExtractor2D(const geometry::ViewInformation2D& rViewInformation);
    void processBasePrimitive2D(const primitive2d::BasePrimitive2D& rCandidate) override;
    virtual void processTextPrimitive2D(const primitive2d::BasePrimitive2D& rCandidate) = 0;
    virtual ~TextExtractor2D() override;
};
}

/* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */