xref: /aoo41x/main/svgio/source/svgreader/svgcharacternode.cxx (revision ddde725d)

/**************************************************************
 *
 * 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
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 *
 *************************************************************/

// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_svgio.hxx"

#include <svgio/svgreader/svgcharacternode.hxx>
#include <svgio/svgreader/svgstyleattributes.hxx>
#include <drawinglayer/attribute/fontattribute.hxx>
#include <drawinglayer/primitive2d/textprimitive2d.hxx>
#include <drawinglayer/primitive2d/textlayoutdevice.hxx>
#include <drawinglayer/primitive2d/textbreakuphelper.hxx>
#include <drawinglayer/primitive2d/groupprimitive2d.hxx>
#include <drawinglayer/primitive2d/textdecoratedprimitive2d.hxx>

//////////////////////////////////////////////////////////////////////////////

namespace svgio
{
    namespace svgreader
    {
        SvgTextPositions::SvgTextPositions()
        :   maX(),
            maY(),
            maDx(),
            maDy(),
            maRotate(),
            maTextLength(),
            mbLengthAdjust(true)
        {
        }

        void SvgTextPositions::parseTextPositionAttributes(const rtl::OUString& rTokenName, SVGToken aSVGToken, const rtl::OUString& aContent)
        {
            // parse own
            switch(aSVGToken)
            {
                case SVGTokenX:
                {
                    if(aContent.getLength())
                    {
                        SvgNumberVector aVector;

                        if(readSvgNumberVector(aContent, aVector))
                        {
                            setX(aVector);
                        }
                    }
                    break;
                }
                case SVGTokenY:
                {
                    if(aContent.getLength())
                    {
                        SvgNumberVector aVector;

                        if(readSvgNumberVector(aContent, aVector))
                        {
                            setY(aVector);
                        }
                    }
                    break;
                }
                case SVGTokenDx:
                {
                    if(aContent.getLength())
                    {
                        SvgNumberVector aVector;

                        if(readSvgNumberVector(aContent, aVector))
                        {
                            setDx(aVector);
                        }
                    }
                    break;
                }
                case SVGTokenDy:
                {
                    if(aContent.getLength())
                    {
                        SvgNumberVector aVector;

                        if(readSvgNumberVector(aContent, aVector))
                        {
                            setDy(aVector);
                        }
                    }
                    break;
                }
                case SVGTokenRotate:
                {
                    if(aContent.getLength())
                    {
                        SvgNumberVector aVector;

                        if(readSvgNumberVector(aContent, aVector))
                        {
                            setRotate(aVector);
                        }
                    }
                    break;
                }
                case SVGTokenTextLength:
                {
                    SvgNumber aNum;

                    if(readSingleNumber(aContent, aNum))
                    {
                        if(aNum.isPositive())
                        {
                            setTextLength(aNum);
                        }
                    }
                    break;
                }
                case SVGTokenLengthAdjust:
                {
                    if(aContent.getLength())
                    {
                        static rtl::OUString aStrSpacing(rtl::OUString::createFromAscii("spacing"));
                        static rtl::OUString aStrSpacingAndGlyphs(rtl::OUString::createFromAscii("spacingAndGlyphs"));

                        if(aContent.match(aStrSpacing))
                        {
                            setLengthAdjust(true);
                        }
                        else if(aContent.match(aStrSpacingAndGlyphs))
                        {
                            setLengthAdjust(false);
                        }
                    }
                    break;
                }
            }
        }

    } // end of namespace svgreader
} // end of namespace svgio

//////////////////////////////////////////////////////////////////////////////

namespace svgio
{
    namespace svgreader
    {
        class localTextBreakupHelper : public drawinglayer::primitive2d::TextBreakupHelper
        {
        private:
            SvgTextPosition&                    mrSvgTextPosition;

        protected:
            /// allow user callback to allow changes to the new TextTransformation. Default
            /// does nothing.
            virtual bool allowChange(sal_uInt32 nCount, basegfx::B2DHomMatrix& rNewTransform, sal_uInt32 nIndex, sal_uInt32 nLength);

        public:
            localTextBreakupHelper(
                const drawinglayer::primitive2d::Primitive2DReference& rxSource,
                SvgTextPosition& rSvgTextPosition)
            :   drawinglayer::primitive2d::TextBreakupHelper(rxSource),
                mrSvgTextPosition(rSvgTextPosition)
            {
            }
        };

        bool localTextBreakupHelper::allowChange(sal_uInt32 nCount, basegfx::B2DHomMatrix& rNewTransform, sal_uInt32 nIndex, sal_uInt32 nLength)
        {
            const double fRotation(mrSvgTextPosition.consumeRotation());

            if(0.0 != fRotation)
            {
                const basegfx::B2DPoint aBasePoint(rNewTransform * basegfx::B2DPoint(0.0, 0.0));

                rNewTransform.translate(-aBasePoint.getX(), -aBasePoint.getY());
                rNewTransform.rotate(fRotation);
                rNewTransform.translate(aBasePoint.getX(), aBasePoint.getY());
            }

            return true;
        }

    } // end of namespace svgreader
} // end of namespace svgio

//////////////////////////////////////////////////////////////////////////////

namespace svgio
{
    namespace svgreader
    {
        SvgCharacterNode::SvgCharacterNode(
            SvgDocument& rDocument,
            SvgNode* pParent,
            const rtl::OUString& rText)
        :   SvgNode(SVGTokenCharacter, rDocument, pParent),
            maText(rText)
        {
        }

        SvgCharacterNode::~SvgCharacterNode()
        {
        }

        const SvgStyleAttributes* SvgCharacterNode::getSvgStyleAttributes() const
        {
            // no own style, use parent's
            if(getParent())
            {
                return getParent()->getSvgStyleAttributes();
            }
            else
            {
                return 0;
            }
        }

        drawinglayer::primitive2d::TextSimplePortionPrimitive2D* SvgCharacterNode::createSimpleTextPrimitive(
            SvgTextPosition& rSvgTextPosition,
            const SvgStyleAttributes& rSvgStyleAttributes) const
        {
            // prepare retval, index and length
            drawinglayer::primitive2d::TextSimplePortionPrimitive2D* pRetval = 0;
            sal_uInt32 nIndex(0);
            sal_uInt32 nLength(getText().getLength());

            if(nLength)
            {
                // prepare FontAttribute
                const rtl::OUString aFontFamily = rSvgStyleAttributes.getFontFamily().empty() ?
                    rtl::OUString(rtl::OUString::createFromAscii("Times New Roman")) :
                    rSvgStyleAttributes.getFontFamily()[0];
                const ::FontWeight nFontWeight(getVclFontWeight(rSvgStyleAttributes.getFontWeight()));
                bool bSymbol(false);
                bool bVertical(false);
                bool bItalic(FontStyle_italic == rSvgStyleAttributes.getFontStyle() || FontStyle_oblique == rSvgStyleAttributes.getFontStyle());
                bool bMonospaced(false);
                bool bOutline(false);
                bool bRTL(false);
                bool bBiDiStrong(false);

                const drawinglayer::attribute::FontAttribute aFontAttribute(
                    aFontFamily,
                    rtl::OUString(),
                    nFontWeight,
                    bSymbol,
                    bVertical,
                    bItalic,
                    bMonospaced,
                    bOutline,
                    bRTL,
                    bBiDiStrong);

                // prepare FontSize
                double fFontWidth(rSvgStyleAttributes.getFontSize().solve(*this, length));
                double fFontHeight(fFontWidth);

                // prepare locale
                ::com::sun::star::lang::Locale aLocale;

                // prepare TextLayouterDevice
                drawinglayer::primitive2d::TextLayouterDevice aTextLayouterDevice;
                aTextLayouterDevice.setFontAttribute(aFontAttribute, fFontWidth, fFontHeight, aLocale);

                // prepare TextArray
                ::std::vector< double > aTextArray(rSvgTextPosition.getX());

                if(!aTextArray.empty() && aTextArray.size() < nLength)
                {
                    const sal_uInt32 nArray(aTextArray.size());

                    if(nArray < nLength)
                    {
                        double fStartX(0.0);

                        if(rSvgTextPosition.getParent() && rSvgTextPosition.getParent()->getAbsoluteX())
                        {
                            fStartX = rSvgTextPosition.getParent()->getPosition().getX();
                        }
                        else
                        {
                            fStartX = aTextArray[nArray - 1];
                        }

                        ::std::vector< double > aExtendArray(aTextLayouterDevice.getTextArray(getText(), nArray, nLength - nArray));
                        aTextArray.reserve(nLength);

                        for(sal_uInt32 a(0); a < aExtendArray.size(); a++)
                        {
                            aTextArray.push_back(aExtendArray[a] + fStartX);
                        }
                    }
                }

                // get current TextPosition and TextWidth in units
                basegfx::B2DPoint aPosition(rSvgTextPosition.getPosition());
                double fTextWidth(aTextLayouterDevice.getTextWidth(getText(), nIndex, nLength));

                // check for user-given TextLength
                if(0.0 != rSvgTextPosition.getTextLength()
                    && !basegfx::fTools::equal(fTextWidth, rSvgTextPosition.getTextLength()))
                {
                    const double fFactor(rSvgTextPosition.getTextLength() / fTextWidth);

                    if(rSvgTextPosition.getLengthAdjust())
                    {
                        // spacing, need to create and expand TextArray
                        if(aTextArray.empty())
                        {
                            aTextArray = aTextLayouterDevice.getTextArray(getText(), nIndex, nLength);
                        }

                        for(sal_uInt32 a(0); a < aTextArray.size(); a++)
                        {
                            aTextArray[a] *= fFactor;
                        }
                    }
                    else
                    {
                        // spacing and glyphs, just apply to FontWidth
                        fFontWidth *= fFactor;
                    }

                    fTextWidth = rSvgTextPosition.getTextLength();
                }

                // get TextAlign
                TextAlign aTextAlign(rSvgStyleAttributes.getTextAlign());

                // map TextAnchor to TextAlign, there seems not to be a difference
                if(TextAnchor_notset != rSvgStyleAttributes.getTextAnchor())
                {
                    switch(rSvgStyleAttributes.getTextAnchor())
                    {
                        case TextAnchor_start:
                        {
                            aTextAlign = TextAlign_left;
                            break;
                        }
                        case TextAnchor_middle:
                        {
                            aTextAlign = TextAlign_center;
                            break;
                        }
                        case TextAnchor_end:
                        {
                            aTextAlign = TextAlign_right;
                            break;
                        }
                    }
                }

                // apply TextAlign
                switch(aTextAlign)
                {
                    case TextAlign_right:
                    {
                        aPosition.setX(aPosition.getX() - fTextWidth);
                        break;
                    }
                    case TextAlign_center:
                    {
                        aPosition.setX(aPosition.getX() - (fTextWidth * 0.5));
                        break;
                    }
                    case TextAlign_notset:
                    case TextAlign_left:
                    case TextAlign_justify:
                    {
                        // TextAlign_notset, TextAlign_left: nothing to do
                        // TextAlign_justify is not clear currently; handle as TextAlign_left
                        break;
                    }
                }

                // get fill color
                const basegfx::BColor aFill(rSvgStyleAttributes.getFill()
                    ? *rSvgStyleAttributes.getFill()
                    : basegfx::BColor(0.0, 0.0, 0.0));

                // prepare TextTransformation
                basegfx::B2DHomMatrix aTextTransform;

                aTextTransform.scale(fFontWidth, fFontHeight);
                aTextTransform.translate(aPosition.getX(), aPosition.getY());

                // check TextDecoration and if TextDecoratedPortionPrimitive2D is needed
                const TextDecoration aDeco(rSvgStyleAttributes.getTextDecoration());

                if(TextDecoration_underline == aDeco
                    || TextDecoration_overline == aDeco
                    || TextDecoration_line_through == aDeco)
                {
                    // get the fill for decroation as described by SVG. We cannot
                    // have different stroke colors/definitions for those, though
                    const SvgStyleAttributes* pDecoDef = rSvgStyleAttributes.getTextDecorationDefiningSvgStyleAttributes();
                    const basegfx::BColor aDecoColor(pDecoDef && pDecoDef->getFill() ? *pDecoDef->getFill() : aFill);

                    // create decorated text primitive
                    pRetval = new drawinglayer::primitive2d::TextDecoratedPortionPrimitive2D(
                        aTextTransform,
                        getText(),
                        nIndex,
                        nLength,
                        aTextArray,
                        aFontAttribute,
                        aLocale,
                        aFill,

                        // extra props for decorated
                        aDecoColor,
                        aDecoColor,
                        TextDecoration_overline == aDeco ? drawinglayer::primitive2d::TEXT_LINE_SINGLE : drawinglayer::primitive2d::TEXT_LINE_NONE,
                        TextDecoration_underline == aDeco ? drawinglayer::primitive2d::TEXT_LINE_SINGLE : drawinglayer::primitive2d::TEXT_LINE_NONE,
                        false,
                        TextDecoration_line_through == aDeco ? drawinglayer::primitive2d::TEXT_STRIKEOUT_SINGLE : drawinglayer::primitive2d::TEXT_STRIKEOUT_NONE,
                        false,
                        drawinglayer::primitive2d::TEXT_EMPHASISMARK_NONE,
                        true,
                        false,
                        drawinglayer::primitive2d::TEXT_RELIEF_NONE,
                        false);
                }
                else
                {
                    // create text primitive
                    pRetval = new drawinglayer::primitive2d::TextSimplePortionPrimitive2D(
                        aTextTransform,
                        getText(),
                        nIndex,
                        nLength,
                        aTextArray,
                        aFontAttribute,
                        aLocale,
                        aFill);
                }

                // advance current TextPosition
                rSvgTextPosition.setPosition(rSvgTextPosition.getPosition() + basegfx::B2DVector(fTextWidth, 0.0));
            }

            return pRetval;
        }

        void SvgCharacterNode::decomposeTextWithStyle(
            drawinglayer::primitive2d::Primitive2DSequence& rTarget,
            SvgTextPosition& rSvgTextPosition,
            const SvgStyleAttributes& rSvgStyleAttributes) const
        {
            const drawinglayer::primitive2d::Primitive2DReference xRef(
                createSimpleTextPrimitive(
                    rSvgTextPosition,
                    rSvgStyleAttributes));

            if(xRef.is())
            {
                if(!rSvgTextPosition.isRotated())
                {
                    drawinglayer::primitive2d::appendPrimitive2DReferenceToPrimitive2DSequence(rTarget, xRef);
                }
                else
                {
                    // need to apply rotations to each character as given
                    localTextBreakupHelper alocalTextBreakupHelper(xRef, rSvgTextPosition);
                    const drawinglayer::primitive2d::Primitive2DSequence aResult(
                        alocalTextBreakupHelper.getResult(drawinglayer::primitive2d::BreakupUnit_character));

                    if(aResult.hasElements())
                    {
                        drawinglayer::primitive2d::appendPrimitive2DSequenceToPrimitive2DSequence(rTarget, aResult);
                    }

                    // also consume for the implied single space
                    rSvgTextPosition.consumeRotation();
                }
            }
        }

        void SvgCharacterNode::whiteSpaceHandling()
        {
            if(XmlSpace_default == getXmlSpace())
            {
                maText = whiteSpaceHandlingDefault(maText);
            }
            else
            {
                maText = whiteSpaceHandlingPreserve(maText);
            }
        }

        void SvgCharacterNode::addGap()
        {
            maText += rtl::OUString(sal_Unicode(' '));
        }

        void SvgCharacterNode::concatenate(const rtl::OUString& rText)
        {
            maText += rText;
        }

        void SvgCharacterNode::decomposeText(drawinglayer::primitive2d::Primitive2DSequence& rTarget, SvgTextPosition& rSvgTextPosition) const
        {
            if(getText().getLength())
            {
                const SvgStyleAttributes* pSvgStyleAttributes = getSvgStyleAttributes();

                if(pSvgStyleAttributes)
                {
                    decomposeTextWithStyle(rTarget, rSvgTextPosition, *pSvgStyleAttributes);
                }
            }
        }

    } // end of namespace svgreader
} // end of namespace svgio

//////////////////////////////////////////////////////////////////////////////

namespace svgio
{
    namespace svgreader
    {
        SvgTextPosition::SvgTextPosition(
            SvgTextPosition* pParent,
            const InfoProvider& rInfoProvider,
            const SvgTextPositions& rSvgTextPositions)
        :   mpParent(pParent),
            maX(), // computed below
            maY(), // computed below
            maRotate(solveSvgNumberVector(rSvgTextPositions.getRotate(), rInfoProvider, length)),
            mfTextLength(0.0),
            maPosition(), // computed below
            mnRotationIndex(0),
            mbLengthAdjust(rSvgTextPositions.getLengthAdjust()),
            mbAbsoluteX(false),
            mbAbsoluteY(false)
        {
            // get TextLength if provided
            if(rSvgTextPositions.getTextLength().isSet())
            {
                mfTextLength = rSvgTextPositions.getTextLength().solve(rInfoProvider, length);
            }

            // SVG does not really define in which units a �rotate� for Text/TSpan is given,
            // but it seems to be degrees. Convert here to radians
            if(!maRotate.empty())
            {
                const double fFactor(F_PI / 180.0);

                for(sal_uInt32 a(0); a < maRotate.size(); a++)
                {
                    maRotate[a] *= fFactor;
                }
            }

            // get text positions X
            const sal_uInt32 nSizeX(rSvgTextPositions.getX().size());

            if(nSizeX)
            {
                // we have absolute positions, get first one as current text position X
                maPosition.setX(rSvgTextPositions.getX()[0].solve(rInfoProvider, xcoordinate));
                mbAbsoluteX = true;

                if(nSizeX > 1)
                {
                    // fill deltas to maX
                    maX.reserve(nSizeX);

                    for(sal_uInt32 a(1); a < nSizeX; a++)
                    {
                        maX.push_back(rSvgTextPositions.getX()[a].solve(rInfoProvider, xcoordinate) - maPosition.getX());
                    }
                }
            }
            else
            {
                // no absolute position, get from parent
                if(pParent)
                {
                    maPosition.setX(pParent->getPosition().getX());
                }

                const sal_uInt32 nSizeDx(rSvgTextPositions.getDx().size());

                if(nSizeDx)
                {
                    // relative positions given, translate position derived from parent
                    maPosition.setX(maPosition.getX() + rSvgTextPositions.getDx()[0].solve(rInfoProvider, xcoordinate));

                    if(nSizeDx > 1)
                    {
                        // fill deltas to maX
                        maX.reserve(nSizeDx);

                        for(sal_uInt32 a(1); a < nSizeDx; a++)
                        {
                            maX.push_back(rSvgTextPositions.getDx()[a].solve(rInfoProvider, xcoordinate));
                        }
                    }
                }
            }

            // get text positions Y
            const sal_uInt32 nSizeY(rSvgTextPositions.getY().size());

            if(nSizeY)
            {
                // we have absolute positions, get first one as current text position Y
                maPosition.setY(rSvgTextPositions.getY()[0].solve(rInfoProvider, ycoordinate));
                mbAbsoluteX = true;

                if(nSizeY > 1)
                {
                    // fill deltas to maY
                    maY.reserve(nSizeY);

                    for(sal_uInt32 a(1); a < nSizeY; a++)
                    {
                        maY.push_back(rSvgTextPositions.getY()[a].solve(rInfoProvider, ycoordinate) - maPosition.getY());
                    }
                }
            }
            else
            {
                // no absolute position, get from parent
                if(pParent)
                {
                    maPosition.setY(pParent->getPosition().getY());
                }

                const sal_uInt32 nSizeDy(rSvgTextPositions.getDy().size());

                if(nSizeDy)
                {
                    // relative positions given, translate position derived from parent
                    maPosition.setY(maPosition.getY() + rSvgTextPositions.getDy()[0].solve(rInfoProvider, ycoordinate));

                    if(nSizeDy > 1)
                    {
                        // fill deltas to maY
                        maY.reserve(nSizeDy);

                        for(sal_uInt32 a(1); a < nSizeDy; a++)
                        {
                            maY.push_back(rSvgTextPositions.getDy()[a].solve(rInfoProvider, ycoordinate));
                        }
                    }
                }
            }
        }

        bool SvgTextPosition::isRotated() const
        {
            if(maRotate.empty())
            {
                if(getParent())
                {
                    return getParent()->isRotated();
                }
                else
                {
                    return false;
                }
            }
            else
            {
                return true;
            }
        }

        double SvgTextPosition::consumeRotation()
        {
            double fRetval(0.0);

            if(maRotate.empty())
            {
                if(getParent())
                {
                    fRetval = mpParent->consumeRotation();
                }
                else
                {
                    fRetval = 0.0;
                }
            }
            else
            {
                const sal_uInt32 nSize(maRotate.size());

                if(mnRotationIndex < nSize)
                {
                    fRetval = maRotate[mnRotationIndex++];
                }
                else
                {
                    fRetval = maRotate[nSize - 1];
                }
            }

            return fRetval;
        }

    } // end of namespace svgreader
} // end of namespace svgio

//////////////////////////////////////////////////////////////////////////////
// eof