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Diffstat (limited to 'svgio/source/svgreader/svgcharacternode.cxx')
| -rw-r--r-- | svgio/source/svgreader/svgcharacternode.cxx | 551 |
1 files changed, 551 insertions, 0 deletions
diff --git a/svgio/source/svgreader/svgcharacternode.cxx b/svgio/source/svgreader/svgcharacternode.cxx new file mode 100644 index 0000000000..7d5a2fcb9f --- /dev/null +++ b/svgio/source/svgreader/svgcharacternode.cxx @@ -0,0 +1,551 @@ +/* -*- 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 <svgcharacternode.hxx> +#include <svgstyleattributes.hxx> +#include <drawinglayer/primitive2d/textprimitive2d.hxx> +#include <drawinglayer/primitive2d/textlayoutdevice.hxx> +#include <drawinglayer/primitive2d/textbreakuphelper.hxx> +#include <drawinglayer/primitive2d/textdecoratedprimitive2d.hxx> +#include <drawinglayer/primitive2d/unifiedtransparenceprimitive2d.hxx> +#include <utility> +#include <o3tl/string_view.hxx> +#include <osl/diagnose.h> + +using namespace drawinglayer::primitive2d; + +namespace svgio::svgreader +{ + namespace { + + class localTextBreakupHelper : public 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) override; + + public: + localTextBreakupHelper( + const TextSimplePortionPrimitive2D& rSource, + SvgTextPosition& rSvgTextPosition) + : TextBreakupHelper(rSource), + 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; + } + + SvgCharacterNode::SvgCharacterNode( + SvgDocument& rDocument, + SvgNode* pParent, + OUString aText) + : SvgNode(SVGToken::Character, rDocument, pParent), + maText(std::move(aText)), + mpParentLine(nullptr) + { + } + + SvgCharacterNode::~SvgCharacterNode() + { + } + + const SvgStyleAttributes* SvgCharacterNode::getSvgStyleAttributes() const + { + // no own style, use parent's + if(getParent()) + { + return getParent()->getSvgStyleAttributes(); + } + else + { + return nullptr; + } + } + + drawinglayer::attribute::FontAttribute SvgCharacterNode::getFontAttribute( + const SvgStyleAttributes& rSvgStyleAttributes) + { + const SvgStringVector& rFontFamilyVector = rSvgStyleAttributes.getFontFamily(); + OUString aFontFamily("Times New Roman"); + if(!rFontFamilyVector.empty()) + aFontFamily=rFontFamilyVector[0]; + + // #i122324# if the FontFamily name ends on ' embedded' it is probably a re-import + // of a SVG export with font embedding. Remove this to make font matching work. This + // is pretty safe since there should be no font family names ending on ' embedded'. + // Remove again when FontEmbedding is implemented in SVG import + if(aFontFamily.endsWith(" embedded")) + { + aFontFamily = aFontFamily.copy(0, aFontFamily.getLength() - 9); + } + + const ::FontWeight nFontWeight(getVclFontWeight(rSvgStyleAttributes.getFontWeight())); + bool bItalic(FontStyle::italic == rSvgStyleAttributes.getFontStyle() || FontStyle::oblique == rSvgStyleAttributes.getFontStyle()); + + return drawinglayer::attribute::FontAttribute( + aFontFamily, + OUString(), + nFontWeight, + false/*bSymbol*/, + false/*bVertical*/, + bItalic, + false/*bMonospaced*/, + false/*bOutline*/, + false/*bRTL*/, + false/*bBiDiStrong*/); + } + + rtl::Reference<BasePrimitive2D> SvgCharacterNode::createSimpleTextPrimitive( + SvgTextPosition& rSvgTextPosition, + const SvgStyleAttributes& rSvgStyleAttributes) const + { + // prepare retval, index and length + rtl::Reference<BasePrimitive2D> pRetval; + sal_uInt32 nLength(getText().getLength()); + + if(nLength) + { + sal_uInt32 nIndex(0); + + // prepare FontAttribute + const drawinglayer::attribute::FontAttribute aFontAttribute(getFontAttribute(rSvgStyleAttributes)); + + // prepare FontSizeNumber + double fFontWidth(rSvgStyleAttributes.getFontSizeNumber().solve(*this)); + double fFontHeight(fFontWidth); + + // prepare locale + css::lang::Locale aLocale; + + // prepare TextLayouterDevice + TextLayouterDevice aTextLayouterDevice; + aTextLayouterDevice.setFontAttribute(aFontAttribute, fFontWidth, fFontHeight, aLocale); + + // prepare TextArray + ::std::vector< double > aTextArray(rSvgTextPosition.getX()); + ::std::vector< double > aDxArray(rSvgTextPosition.getDx()); + + // Do nothing when X and Dx arrays are empty + if((!aTextArray.empty() || !aDxArray.empty()) && aTextArray.size() < nLength) + { + const sal_uInt32 nArray(aTextArray.size()); + + double fStartX(0.0); + if (!aTextArray.empty()) + { + 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)); + double fComulativeDx(0.0); + + aTextArray.reserve(nLength); + for(size_t a = 0; a < aExtendArray.size(); ++a) + { + if (a < aDxArray.size()) + { + fComulativeDx += aDxArray[a]; + } + aTextArray.push_back(aExtendArray[a] + fStartX + fComulativeDx); + } + } + + // 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(auto &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; + } + default: + { + break; + } + } + } + + // apply TextAlign + switch(aTextAlign) + { + case TextAlign::right: + { + aPosition.setX(aPosition.getX() - mpParentLine->getTextLineWidth()); + break; + } + case TextAlign::center: + { + aPosition.setX(aPosition.getX() - (mpParentLine->getTextLineWidth() * 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 DominantBaseline + const DominantBaseline aDominantBaseline(rSvgStyleAttributes.getDominantBaseline()); + + basegfx::B2DRange aRange(aTextLayouterDevice.getTextBoundRect(getText(), nIndex, nLength)); + // apply DominantBaseline + switch(aDominantBaseline) + { + case DominantBaseline::Middle: + { + aPosition.setY(aPosition.getY() - aRange.getCenterY()); + break; + } + case DominantBaseline::Hanging: + { + aPosition.setY(aPosition.getY() - aRange.getMinY()); + break; + } + default: // DominantBaseline::Auto + { + // nothing to do + break; + } + } + + // get BaselineShift + const BaselineShift aBaselineShift(rSvgStyleAttributes.getBaselineShift()); + + // apply BaselineShift + switch(aBaselineShift) + { + case BaselineShift::Sub: + { + aPosition.setY(aPosition.getY() + aTextLayouterDevice.getUnderlineOffset()); + break; + } + case BaselineShift::Super: + { + aPosition.setY(aPosition.getY() + aTextLayouterDevice.getOverlineOffset()); + break; + } + case BaselineShift::Percentage: + case BaselineShift::Length: + { + const SvgNumber aNumber(rSvgStyleAttributes.getBaselineShiftNumber()); + const double mfBaselineShift(aNumber.solve(*this)); + + aPosition.setY(aPosition.getY() - mfBaselineShift); + break; + } + default: // BaselineShift::Baseline + { + // nothing to do + break; + } + } + + // get fill color + basegfx::BColor aFill(0, 0, 0); + if(rSvgStyleAttributes.getFill()) + aFill = *rSvgStyleAttributes.getFill(); + + // get fill opacity + double fFillOpacity = 1.0; + if (rSvgStyleAttributes.getFillOpacity().isSet()) + { + fFillOpacity = rSvgStyleAttributes.getFillOpacity().getNumber(); + } + + // 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 decoration as described by SVG. We cannot + // have different stroke colors/definitions for those, though + const SvgStyleAttributes* pDecoDef = rSvgStyleAttributes.getTextDecorationDefiningSvgStyleAttributes(); + + basegfx::BColor aDecoColor(aFill); + if(pDecoDef && pDecoDef->getFill()) + aDecoColor = *pDecoDef->getFill(); + + TextLine eFontOverline = TEXT_LINE_NONE; + if(TextDecoration::overline == aDeco) + eFontOverline = TEXT_LINE_SINGLE; + + TextLine eFontUnderline = TEXT_LINE_NONE; + if(TextDecoration::underline == aDeco) + eFontUnderline = TEXT_LINE_SINGLE; + + TextStrikeout eTextStrikeout = TEXT_STRIKEOUT_NONE; + if(TextDecoration::line_through == aDeco) + eTextStrikeout = TEXT_STRIKEOUT_SINGLE; + + // create decorated text primitive + pRetval = new TextDecoratedPortionPrimitive2D( + aTextTransform, + getText(), + nIndex, + nLength, + std::move(aTextArray), + {}, + aFontAttribute, + aLocale, + aFill, + COL_TRANSPARENT, + + // extra props for decorated + aDecoColor, + aDecoColor, + eFontOverline, + eFontUnderline, + false, + eTextStrikeout, + false, + TEXT_FONT_EMPHASIS_MARK_NONE, + true, + false, + TEXT_RELIEF_NONE, + false); + } + else + { + // create text primitive + pRetval = new TextSimplePortionPrimitive2D( + aTextTransform, + getText(), + nIndex, + nLength, + std::move(aTextArray), + {}, + aFontAttribute, + aLocale, + aFill); + } + + if (fFillOpacity != 1.0) + { + pRetval = new UnifiedTransparencePrimitive2D( + drawinglayer::primitive2d::Primitive2DContainer{ pRetval }, + 1.0 - fFillOpacity); + } + + // advance current TextPosition + rSvgTextPosition.setPosition(rSvgTextPosition.getPosition() + basegfx::B2DVector(fTextWidth, 0.0)); + } + + return pRetval; + } + + void SvgCharacterNode::decomposeTextWithStyle( + Primitive2DContainer& rTarget, + SvgTextPosition& rSvgTextPosition, + const SvgStyleAttributes& rSvgStyleAttributes) const + { + const Primitive2DReference xRef( + createSimpleTextPrimitive( + rSvgTextPosition, + rSvgStyleAttributes)); + + if(!(xRef.is() && (Visibility::visible == rSvgStyleAttributes.getVisibility()))) + return; + + if(!rSvgTextPosition.isRotated()) + { + rTarget.push_back(xRef); + } + else + { + // need to apply rotations to each character as given + const TextSimplePortionPrimitive2D* pCandidate = + dynamic_cast< const TextSimplePortionPrimitive2D* >(xRef.get()); + + if(pCandidate) + { + localTextBreakupHelper alocalTextBreakupHelper(*pCandidate, rSvgTextPosition); + Primitive2DContainer aResult = alocalTextBreakupHelper.extractResult(); + + if(!aResult.empty()) + { + rTarget.append(std::move(aResult)); + } + + // also consume for the implied single space + rSvgTextPosition.consumeRotation(); + } + else + { + OSL_ENSURE(false, "Used primitive is not a text primitive (!)"); + } + } + } + + void SvgCharacterNode::whiteSpaceHandling() + { + bool bIsDefault(XmlSpace::Default == getXmlSpace()); + // if xml:space="default" then remove all newline characters, otherwise convert them to space + // convert tab to space too + maText = maTextBeforeSpaceHandling = maText.replaceAll(u"\n", bIsDefault ? u"" : u" ").replaceAll(u"\t", u" "); + + if(bIsDefault) + { + // strip of all leading and trailing spaces + // and consolidate contiguous space + maText = consolidateContiguousSpace(maText.trim()); + } + } + + SvgCharacterNode* SvgCharacterNode::addGap(SvgCharacterNode* pPreviousCharacterNode) + { + // maText may have lost all text. If that's the case, ignore as invalid character node + // Also ignore if maTextBeforeSpaceHandling just have spaces + if(!maText.isEmpty() && !o3tl::trim(maTextBeforeSpaceHandling).empty()) + { + if(pPreviousCharacterNode) + { + bool bAddGap(true); + + // Do not add a gap if last node doesn't end with a space and + // current note doesn't start with a space + const sal_uInt32 nLastLength(pPreviousCharacterNode->maTextBeforeSpaceHandling.getLength()); + if(pPreviousCharacterNode->maTextBeforeSpaceHandling[nLastLength - 1] != ' ' && maTextBeforeSpaceHandling[0] != ' ') + bAddGap = false; + + // Do not add a gap if this node and last node are in different lines + if(pPreviousCharacterNode->mpParentLine != mpParentLine) + bAddGap = false; + + // add in-between whitespace (single space) to the beginning of the current character node + if(bAddGap) + { + maText = " " + maText; + } + } + + // this becomes the previous character node + return this; + } + + return pPreviousCharacterNode; + } + + void SvgCharacterNode::concatenate(std::u16string_view rText) + { + maText += rText; + } + + void SvgCharacterNode::decomposeText(Primitive2DContainer& rTarget, SvgTextPosition& rSvgTextPosition) const + { + if(!getText().isEmpty()) + { + const SvgStyleAttributes* pSvgStyleAttributes = getSvgStyleAttributes(); + + if(pSvgStyleAttributes) + { + decomposeTextWithStyle(rTarget, rSvgTextPosition, *pSvgStyleAttributes); + } + } + } + +} // end of namespace svgio + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |