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Diffstat (limited to '')
| -rw-r--r-- | svgio/source/svgreader/svgsvgnode.cxx | 826 |
1 files changed, 826 insertions, 0 deletions
diff --git a/svgio/source/svgreader/svgsvgnode.cxx b/svgio/source/svgreader/svgsvgnode.cxx new file mode 100644 index 000000000..cd8d25df0 --- /dev/null +++ b/svgio/source/svgreader/svgsvgnode.cxx @@ -0,0 +1,826 @@ +/* -*- 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 <svgsvgnode.hxx> +#include <drawinglayer/geometry/viewinformation2d.hxx> +#include <drawinglayer/primitive2d/transformprimitive2d.hxx> +#include <drawinglayer/primitive2d/maskprimitive2d.hxx> +#include <basegfx/polygon/b2dpolygontools.hxx> +#include <basegfx/polygon/b2dpolygon.hxx> +#include <basegfx/matrix/b2dhommatrixtools.hxx> +#include <drawinglayer/primitive2d/PolygonHairlinePrimitive2D.hxx> +#include <drawinglayer/primitive2d/hiddengeometryprimitive2d.hxx> +#include <o3tl/unit_conversion.hxx> +#include <svgdocument.hxx> + +namespace svgio::svgreader +{ + SvgSvgNode::SvgSvgNode( + SvgDocument& rDocument, + SvgNode* pParent) + : SvgNode(SVGToken::Svg, rDocument, pParent), + maSvgStyleAttributes(*this), + mbStyleAttributesInitialized(false) // #i125258# + { + } + + // #i125258# + void SvgSvgNode::initializeStyleAttributes() + { + if(mbStyleAttributesInitialized) + return; + + // #i125258# determine if initial values need to be initialized with hard values + // for the case that this is the outmost SVG statement and it has no parent + // stale (CssStyle for svg may be defined) + bool bSetInitialValues(true); + + if(getParent()) + { + // #i125258# no initial values when it's a SVG element embedded in SVG + bSetInitialValues = false; + } + + if(bSetInitialValues) + { + const SvgStyleAttributes* pStyles = getSvgStyleAttributes(); + + if(pStyles && pStyles->getParentStyle()) + { + // SVG has a parent style (probably CssStyle), check if fill is set there anywhere + // already. If yes, do not set the default fill (black) + bool bFillSet(false); + const SvgStyleAttributes* pParentStyle = pStyles->getParentStyle(); + + while(pParentStyle && !bFillSet) + { + bFillSet = pParentStyle->isFillSet(); + pParentStyle = pParentStyle->getParentStyle(); + } + + if(bFillSet) + { + // #125258# no initial values when SVG has a parent style at which a fill + // is already set + bSetInitialValues = false; + } + } + } + + if(bSetInitialValues) + { + // #i125258# only set if not yet initialized (SvgSvgNode::parseAttribute is already done, + // just setting may revert an already set valid value) + if(!maSvgStyleAttributes.isFillSet()) + { + // #i125258# initial fill is black (see SVG1.1 spec) + maSvgStyleAttributes.setFill(SvgPaint(basegfx::BColor(0.0, 0.0, 0.0), true, true)); + } + } + + mbStyleAttributesInitialized = true; + } + + SvgSvgNode::~SvgSvgNode() + { + } + + const SvgStyleAttributes* SvgSvgNode::getSvgStyleAttributes() const + { + // #i125258# svg node can have CssStyles, too, so check for it here + return checkForCssStyle("svg", maSvgStyleAttributes); + } + + void SvgSvgNode::parseAttribute(const OUString& rTokenName, SVGToken aSVGToken, const OUString& aContent) + { + // call parent + SvgNode::parseAttribute(rTokenName, aSVGToken, aContent); + + // read style attributes + maSvgStyleAttributes.parseStyleAttribute(aSVGToken, aContent, false); + + // parse own + switch(aSVGToken) + { + case SVGToken::Style: + { + readLocalCssStyle(aContent); + break; + } + case SVGToken::ViewBox: + { + const basegfx::B2DRange aRange(readViewBox(aContent, *this)); + + if(!aRange.isEmpty()) + { + setViewBox(&aRange); + } + break; + } + case SVGToken::PreserveAspectRatio: + { + maSvgAspectRatio = readSvgAspectRatio(aContent); + break; + } + case SVGToken::X: + { + SvgNumber aNum; + + if(readSingleNumber(aContent, aNum)) + { + maX = aNum; + } + break; + } + case SVGToken::Y: + { + SvgNumber aNum; + + if(readSingleNumber(aContent, aNum)) + { + maY = aNum; + } + break; + } + case SVGToken::Width: + { + SvgNumber aNum; + + if(readSingleNumber(aContent, aNum)) + { + if(aNum.isPositive()) + { + maWidth = aNum; + } + } + break; + } + case SVGToken::Height: + { + SvgNumber aNum; + + if(readSingleNumber(aContent, aNum)) + { + if(aNum.isPositive()) + { + maHeight = aNum; + } + } + break; + } + case SVGToken::Version: + { + SvgNumber aNum; + + if(readSingleNumber(aContent, aNum)) + { + maVersion = aNum; + } + break; + } + default: + { + break; + } + } + } + + void SvgSvgNode::seekReferenceWidth(double& fWidth, bool& bHasFound) const + { + if (!getParent() || bHasFound) + { + return; + } + const SvgSvgNode* pParentSvgSvgNode = nullptr; + // enclosing svg might have relative width, need to cumulate them till they are + // resolved somewhere up in the node tree + double fPercentage(1.0); + for(const SvgNode* pParent = getParent(); pParent && !bHasFound; pParent = pParent->getParent()) + { + // dynamic_cast results Null-pointer for not SvgSvgNode and so skips them in if condition + pParentSvgSvgNode = dynamic_cast< const SvgSvgNode* >(pParent); + if (pParentSvgSvgNode) + { + if (pParentSvgSvgNode->getViewBox()) + { + // viewbox values are already in 'user unit'. + fWidth = pParentSvgSvgNode->getViewBox()->getWidth() * fPercentage; + bHasFound = true; + } + else + { + // take absolute value or cumulate percentage + if (pParentSvgSvgNode->getWidth().isSet()) + { + if (SvgUnit::percent == pParentSvgSvgNode->getWidth().getUnit()) + { + fPercentage *= pParentSvgSvgNode->getWidth().getNumber() * 0.01; + } + else + { + fWidth = pParentSvgSvgNode->getWidth().solveNonPercentage(*pParentSvgSvgNode) * fPercentage; + bHasFound = true; + } + } // not set => width=100% => factor 1, no need for else + } + } + } + } + + void SvgSvgNode::seekReferenceHeight(double& fHeight, bool& bHasFound) const + { + if (!getParent() || bHasFound) + { + return; + } + const SvgSvgNode* pParentSvgSvgNode = nullptr; + // enclosing svg might have relative width and height, need to cumulate them till they are + // resolved somewhere up in the node tree + double fPercentage(1.0); + for(const SvgNode* pParent = getParent(); pParent && !bHasFound; pParent = pParent->getParent()) + { + // dynamic_cast results Null-pointer for not SvgSvgNode and so skips them in if condition + pParentSvgSvgNode = dynamic_cast< const SvgSvgNode* >(pParent); + if (pParentSvgSvgNode) + { + if (pParentSvgSvgNode->getViewBox()) + { + // viewbox values are already in 'user unit'. + fHeight = pParentSvgSvgNode->getViewBox()->getHeight() * fPercentage; + bHasFound = true; + } + else + { + // take absolute value or cumulate percentage + if (pParentSvgSvgNode->getHeight().isSet()) + { + if (SvgUnit::percent == pParentSvgSvgNode->getHeight().getUnit()) + { + fPercentage *= pParentSvgSvgNode->getHeight().getNumber() * 0.01; + } + else + { + fHeight = pParentSvgSvgNode->getHeight().solveNonPercentage(*pParentSvgSvgNode) * fPercentage; + bHasFound = true; + } + } // not set => height=100% => factor 1, no need for else + } + } + } + } + +// ToDo: Consider attribute overflow in method decomposeSvgNode + void SvgSvgNode::decomposeSvgNode(drawinglayer::primitive2d::Primitive2DContainer& rTarget, bool bReferenced) const + { + drawinglayer::primitive2d::Primitive2DContainer aSequence; + + // #i125258# check now if we need to init some style settings locally. Do not do this + // in the constructor, there is not yet information e.g. about existing CssStyles. + // Here all nodes are read and interpreted + const_cast< SvgSvgNode* >(this)->initializeStyleAttributes(); + + // decompose children + SvgNode::decomposeSvgNode(aSequence, bReferenced); + + if(!aSequence.empty()) + { + if(getParent()) + { + // #i122594# if width/height is not given, it's 100% (see 5.1.2 The 'svg' element in SVG1.1 spec). + // If it is relative, the question is to what. The previous implementation assumed relative to the + // local ViewBox which is implied by (4.2 Basic data types): + + // "Note that the non-property <length> definition also allows a percentage unit identifier. + // The meaning of a percentage length value depends on the attribute for which the percentage + // length value has been specified. Two common cases are: (a) when a percentage length value + // represents a percentage of the viewport width or height (refer to the section that discusses + // units in general), and (b) when a percentage length value represents a percentage of the + // bounding box width or height on a given object (refer to the section that describes object + // bounding box units)." + + // Comparisons with common browsers show that it's mostly interpreted relative to the viewport + // of the parent, and so does the new implementation. + + // Extract known viewport data + // bXXXIsAbsolute tracks whether relative values could be resolved to absolute values + + // If width or height is not provided, the default 100% is used, see SVG 1.1 section 5.1.2 + // value 0.0 here is only to initialize variable + bool bWidthIsAbsolute(getWidth().isSet() && SvgUnit::percent != getWidth().getUnit()); + double fW( bWidthIsAbsolute ? getWidth().solveNonPercentage(*this) : 0.0); + + bool bHeightIsAbsolute(getHeight().isSet() && SvgUnit::percent != getHeight().getUnit()); + double fH( bHeightIsAbsolute ? getHeight().solveNonPercentage(*this) : 0.0); + + // If x or y not provided, then default 0.0 is used, see SVG 1.1 Section 5.1.2 + bool bXIsAbsolute((getX().isSet() && SvgUnit::percent != getX().getUnit()) || !getX().isSet()); + double fX( bXIsAbsolute && getX().isSet() ? getX().solveNonPercentage(*this) : 0.0); + + bool bYIsAbsolute((getY().isSet() && SvgUnit::percent != getY().getUnit()) || !getY().isSet()); + double fY( bYIsAbsolute && getY().isSet() ? getY().solveNonPercentage(*this) : 0.0); + + if ( !bXIsAbsolute || !bWidthIsAbsolute) + { + // get width of enclosing svg and resolve percentage in x and width; + double fWReference(0.0); + bool bHasFoundWidth(false); + seekReferenceWidth(fWReference, bHasFoundWidth); + if (!bHasFoundWidth) + { + if (getViewBox()) + { + fWReference = getViewBox()->getWidth(); + } + else + { + // Even outermost svg has not all information to resolve relative values, + // I use content itself as fallback to set missing values for viewport + // Any better idea for such ill structured svg documents? + const basegfx::B2DRange aChildRange( + aSequence.getB2DRange( + drawinglayer::geometry::ViewInformation2D())); + fWReference = aChildRange.getWidth(); + } + } + // referenced values are already in 'user unit' + if (!bXIsAbsolute) + { + fX = getX().getNumber() * 0.01 * fWReference; + } + if (!bWidthIsAbsolute) + { + fW = (getWidth().isSet() ? getWidth().getNumber() *0.01 : 1.0) * fWReference; + } + } + + if ( !bYIsAbsolute || !bHeightIsAbsolute) + { + // get height of enclosing svg and resolve percentage in y and height + double fHReference(0.0); + bool bHasFoundHeight(false); + seekReferenceHeight(fHReference, bHasFoundHeight); + if (!bHasFoundHeight) + { + if (getViewBox()) + { + fHReference = getViewBox()->getHeight(); + } + else + { + // Even outermost svg has not all information to resolve relative values, + // I use content itself as fallback to set missing values for viewport + // Any better idea for such ill structured svg documents? + const basegfx::B2DRange aChildRange( + aSequence.getB2DRange( + drawinglayer::geometry::ViewInformation2D())); + fHReference = aChildRange.getHeight(); + } + } + + // referenced values are already in 'user unit' + if (!bYIsAbsolute) + { + fY = getY().getNumber() * 0.01 * fHReference; + } + if (!bHeightIsAbsolute) + { + fH = (getHeight().isSet() ? getHeight().getNumber() *0.01 : 1.0) * fHReference; + } + } + + if(getViewBox()) + { + // SVG 1.1 defines in section 7.7 that a negative value for width or height + // in viewBox is an error and that 0.0 disables rendering + if(basegfx::fTools::more(getViewBox()->getWidth(),0.0) && basegfx::fTools::more(getViewBox()->getHeight(),0.0)) + { + // create target range homing x,y, width and height as calculated above + const basegfx::B2DRange aTarget(fX, fY, fX + fW, fY + fH); + + if(aTarget.equal(*getViewBox())) + { + // no mapping needed, append + rTarget.append(aSequence); + } + else + { + // create mapping + // #i122610 SVG 1.1 defines in section 5.1.2 that if the attribute preserveAspectRatio is not specified, + // then the effect is as if a value of 'xMidYMid meet' were specified. + SvgAspectRatio aRatioDefault(SvgAlign::xMidYMid,true); + const SvgAspectRatio& rRatio = getSvgAspectRatio().isSet()? getSvgAspectRatio() : aRatioDefault; + + // let mapping be created from SvgAspectRatio + const basegfx::B2DHomMatrix aEmbeddingTransform( + rRatio.createMapping(aTarget, *getViewBox())); + + // prepare embedding in transformation + const drawinglayer::primitive2d::Primitive2DReference xRef( + new drawinglayer::primitive2d::TransformPrimitive2D( + aEmbeddingTransform, + drawinglayer::primitive2d::Primitive2DContainer(aSequence))); + + if(rRatio.isMeetOrSlice()) + { + // embed in transformation + rTarget.push_back(xRef); + } + else + { + // need to embed in MaskPrimitive2D, too + const drawinglayer::primitive2d::Primitive2DReference xMask( + new drawinglayer::primitive2d::MaskPrimitive2D( + basegfx::B2DPolyPolygon(basegfx::utils::createPolygonFromRect(aTarget)), + drawinglayer::primitive2d::Primitive2DContainer { xRef })); + + rTarget.push_back(xMask); + } + } + } + } + else // no viewBox attribute + { + // Svg defines that a negative value is an error and that 0.0 disables rendering + if(basegfx::fTools::more(fW, 0.0) && basegfx::fTools::more(fH, 0.0)) + { + if(!basegfx::fTools::equalZero(fX) || !basegfx::fTools::equalZero(fY)) + { + // embed in transform + const drawinglayer::primitive2d::Primitive2DReference xRef( + new drawinglayer::primitive2d::TransformPrimitive2D( + basegfx::utils::createTranslateB2DHomMatrix(fX, fY), + std::move(aSequence))); + + aSequence = drawinglayer::primitive2d::Primitive2DContainer { xRef, }; + } + + // embed in MaskPrimitive2D to clip + const drawinglayer::primitive2d::Primitive2DReference xMask( + new drawinglayer::primitive2d::MaskPrimitive2D( + basegfx::B2DPolyPolygon( + basegfx::utils::createPolygonFromRect( + basegfx::B2DRange(fX, fY, fX + fW, fY + fH))), + drawinglayer::primitive2d::Primitive2DContainer(aSequence))); + + // append + rTarget.push_back(xMask); + } + } + } + else // Outermost SVG element + { + // Svg defines that a negative value is an error and that 0.0 disables rendering + // isPositive() not usable because it allows 0.0 in contrast to mathematical definition of 'positive' + const bool bWidthInvalid(getWidth().isSet() && basegfx::fTools::lessOrEqual(getWidth().getNumber(), 0.0)); + const bool bHeightInvalid(getHeight().isSet() && basegfx::fTools::lessOrEqual(getHeight().getNumber(), 0.0)); + if(!bWidthInvalid && !bHeightInvalid) + { + basegfx::B2DRange aSvgCanvasRange; // viewport + double fW = 0.0; // dummy values + double fH = 0.0; + if (const basegfx::B2DRange* pBox = getViewBox()) + { + // SVG 1.1 defines in section 7.7 that a negative value for width or height + // in viewBox is an error and that 0.0 disables rendering + const double fViewBoxWidth = pBox->getWidth(); + const double fViewBoxHeight = pBox->getHeight(); + if(basegfx::fTools::more(fViewBoxWidth,0.0) && basegfx::fTools::more(fViewBoxHeight,0.0)) + { + // The intrinsic aspect ratio of the svg element is given by absolute values of svg width and svg height + // or by the width and height of the viewBox, if svg width or svg height is relative. + // see SVG 1.1 section 7.12 + bool bNeedsMapping(true); + const bool bWidthIsAbsolute(getWidth().isSet() && SvgUnit::percent != getWidth().getUnit()); + const bool bHeightIsAbsolute(getHeight().isSet() && SvgUnit::percent != getHeight().getUnit()); + const double fViewBoxRatio(fViewBoxWidth/fViewBoxHeight); + if(bWidthIsAbsolute && bHeightIsAbsolute) + { + fW = getWidth().solveNonPercentage(*this); + fH = getHeight().solveNonPercentage(*this); + aSvgCanvasRange = basegfx::B2DRange(0.0, 0.0, fW, fH); + } + else if (bWidthIsAbsolute) + { + fW = getWidth().solveNonPercentage(*this); + fH = fW / fViewBoxRatio ; + aSvgCanvasRange = basegfx::B2DRange(0.0, 0.0, fW, fH); + } + else if (bHeightIsAbsolute) + { + fH = getHeight().solveNonPercentage(*this); + fW = fH * fViewBoxRatio ; + aSvgCanvasRange = basegfx::B2DRange(0.0, 0.0, fW, fH); + } + else + { + // There exists no parent to resolve relative width or height. + // Use child size as fallback and expand to aspect ratio given + // by the viewBox. No mapping. + // We get viewport >= content, therefore no clipping. + bNeedsMapping = false; + + const double fChildWidth(pBox->getWidth()); + const double fChildHeight(pBox->getHeight()); + const double fLeft(pBox->getMinX()); + const double fTop(pBox->getMinY()); + if ( fChildWidth / fViewBoxWidth > fChildHeight / fViewBoxHeight ) + { // expand y + fW = fChildWidth; + fH = fChildWidth / fViewBoxRatio; + } + else + { // expand x + fH = fChildHeight; + fW = fChildHeight * fViewBoxRatio; + } + aSvgCanvasRange = basegfx::B2DRange(fLeft, fTop, fLeft + fW, fTop + fH); + } + + if (bNeedsMapping) + { + // create mapping + // SVG 1.1 defines in section 5.1.2 that if the attribute preserveAspectRatio is not specified, + // then the effect is as if a value of 'xMidYMid meet' were specified. + SvgAspectRatio aRatioDefault(SvgAlign::xMidYMid, true); + const SvgAspectRatio& rRatio = getSvgAspectRatio().isSet()? getSvgAspectRatio() : aRatioDefault; + + basegfx::B2DHomMatrix aViewBoxMapping = rRatio.createMapping(aSvgCanvasRange, *pBox); + // no need to check ratio here for slice, the outermost Svg will + // be clipped anyways (see below) + + // scale content to viewBox definitions + const drawinglayer::primitive2d::Primitive2DReference xTransform( + new drawinglayer::primitive2d::TransformPrimitive2D( + aViewBoxMapping, + std::move(aSequence))); + + aSequence = drawinglayer::primitive2d::Primitive2DContainer { xTransform }; + } + } + } + else // no viewbox => no mapping + { + const bool bWidthIsAbsolute(getWidth().isSet() && SvgUnit::percent != getWidth().getUnit()); + const bool bHeightIsAbsolute(getHeight().isSet() && SvgUnit::percent != getHeight().getUnit()); + if (bWidthIsAbsolute && bHeightIsAbsolute) + { + fW =getWidth().solveNonPercentage(*this); + fH =getHeight().solveNonPercentage(*this); + aSvgCanvasRange = basegfx::B2DRange(0.0, 0.0, fW, fH); + } + else + { + // There exists no parent to resolve relative width or height. + // Use child size as fallback. We get viewport >= content, therefore no clipping. + const basegfx::B2DRange aChildRange( + aSequence.getB2DRange( + drawinglayer::geometry::ViewInformation2D())); + const double fChildWidth(aChildRange.getWidth()); + const double fChildHeight(aChildRange.getHeight()); + const double fChildLeft(aChildRange.getMinX()); + const double fChildTop(aChildRange.getMinY()); + fW = bWidthIsAbsolute ? getWidth().solveNonPercentage(*this) : fChildWidth; + fH = bHeightIsAbsolute ? getHeight().solveNonPercentage(*this) : fChildHeight; + const double fLeft(bWidthIsAbsolute ? 0.0 : fChildLeft); + const double fTop(bHeightIsAbsolute ? 0.0 : fChildTop); + aSvgCanvasRange = basegfx::B2DRange(fLeft, fTop, fLeft+fW, fTop+fH); + } + + } + + // to be completely correct in Svg sense it is necessary to clip + // the whole content to the given canvas. I choose here to do this + // initially despite I found various examples of Svg files out there + // which have no correct values for this clipping. It's correct + // due to the Svg spec. + + // different from Svg we have the possibility with primitives to get + // a correct bounding box for the geometry. Get it for evtl. taking action + const basegfx::B2DRange aContentRange( + aSequence.getB2DRange( + drawinglayer::geometry::ViewInformation2D())); + + if(aSvgCanvasRange.isInside(aContentRange)) + { + // no clip needed, but an invisible HiddenGeometryPrimitive2D + // to allow getting the full Svg range using the primitive mechanisms. + // This is needed since e.g. an SdrObject using this as graphic will + // create a mapping transformation to exactly map the content to its + // real life size + const drawinglayer::primitive2d::Primitive2DReference xLine( + new drawinglayer::primitive2d::PolygonHairlinePrimitive2D( + basegfx::utils::createPolygonFromRect( + aSvgCanvasRange), + basegfx::BColor(0.0, 0.0, 0.0))); + const drawinglayer::primitive2d::Primitive2DReference xHidden( + new drawinglayer::primitive2d::HiddenGeometryPrimitive2D( + drawinglayer::primitive2d::Primitive2DContainer { xLine })); + + aSequence.push_back(xHidden); + } + else if(aSvgCanvasRange.overlaps(aContentRange)) + { + // Clip is necessary. This will make Svg images evtl. smaller + // than wanted from Svg (the free space which may be around it is + // conform to the Svg spec), but avoids an expensive and unnecessary + // clip. Keep the full Svg range here to get the correct mappings + // to objects using this. Optimizations can be done in the processors + const drawinglayer::primitive2d::Primitive2DReference xMask( + new drawinglayer::primitive2d::MaskPrimitive2D( + basegfx::B2DPolyPolygon( + basegfx::utils::createPolygonFromRect( + aSvgCanvasRange)), + std::move(aSequence))); + + aSequence = drawinglayer::primitive2d::Primitive2DContainer { xMask }; + } + else + { + // not inside, no overlap. Empty Svg + aSequence.clear(); + } + + if(!aSequence.empty()) + { + // Another correction: + // If no Width/Height is set (usually done in + // <svg ... width="215.9mm" height="279.4mm" >) which + // is the case for own-Impress-exports, assume that + // the Units are already 100ThMM. + // Maybe only for own-Impress-exports, thus may need to be + // &&ed with getDocument().findSvgNodeById("ooo:meta_slides"), + // but does not need to be. + bool bEmbedInFinalTransformPxTo100ThMM(true); + + if(getDocument().findSvgNodeById("ooo:meta_slides") + && !getWidth().isSet() + && !getHeight().isSet()) + { + bEmbedInFinalTransformPxTo100ThMM = false; + } + + if(bEmbedInFinalTransformPxTo100ThMM) + { + // embed in transform primitive to scale to 1/100th mm + // to get from Svg coordinates (px) to drawinglayer coordinates + constexpr double fScaleTo100thmm(o3tl::convert(1.0, o3tl::Length::px, o3tl::Length::mm100)); + const basegfx::B2DHomMatrix aTransform( + basegfx::utils::createScaleB2DHomMatrix( + fScaleTo100thmm, + fScaleTo100thmm)); + + const drawinglayer::primitive2d::Primitive2DReference xTransform( + new drawinglayer::primitive2d::TransformPrimitive2D( + aTransform, + std::move(aSequence))); + + aSequence = drawinglayer::primitive2d::Primitive2DContainer { xTransform }; + } + + // append to result + rTarget.append(aSequence); + } + } + } + } + + if(!(aSequence.empty() && !getParent() && getViewBox())) + return; + + // tdf#118232 No geometry, Outermost SVG element and we have a ViewBox. + // Create a HiddenGeometry Primitive containing an expanded + // hairline geometry to have the size contained + const drawinglayer::primitive2d::Primitive2DReference xLine( + new drawinglayer::primitive2d::PolygonHairlinePrimitive2D( + basegfx::utils::createPolygonFromRect( + *getViewBox()), + basegfx::BColor(0.0, 0.0, 0.0))); + const drawinglayer::primitive2d::Primitive2DReference xHidden( + new drawinglayer::primitive2d::HiddenGeometryPrimitive2D( + drawinglayer::primitive2d::Primitive2DContainer { xLine })); + + rTarget.push_back(xHidden); + } + + basegfx::B2DRange SvgSvgNode::getCurrentViewPort() const + { + if(getViewBox()) + { + return *(getViewBox()); + } + else // viewport should be given by x, y, width, and height + { + // Extract known viewport data + // bXXXIsAbsolute tracks whether relative values could be resolved to absolute values + if (getParent()) + { + // If width or height is not provided, the default 100% is used, see SVG 1.1 section 5.1.2 + // value 0.0 here is only to initialize variable + bool bWidthIsAbsolute(getWidth().isSet() && SvgUnit::percent != getWidth().getUnit()); + double fW( bWidthIsAbsolute ? getWidth().solveNonPercentage(*this) : 0.0); + bool bHeightIsAbsolute(getHeight().isSet() && SvgUnit::percent != getHeight().getUnit()); + double fH( bHeightIsAbsolute ? getHeight().solveNonPercentage(*this) : 0.0); + + // If x or y not provided, then default 0.0 is used, see SVG 1.1 Section 5.1.2 + bool bXIsAbsolute((getX().isSet() && SvgUnit::percent != getX().getUnit()) || !getX().isSet()); + double fX( bXIsAbsolute && getX().isSet() ? getX().solveNonPercentage(*this) : 0.0); + + bool bYIsAbsolute((getY().isSet() && SvgUnit::percent != getY().getUnit()) || !getY().isSet()); + double fY( bYIsAbsolute && getY().isSet() ? getY().solveNonPercentage(*this) : 0.0); + + if (bXIsAbsolute && bYIsAbsolute && bWidthIsAbsolute && bHeightIsAbsolute) + { + return basegfx::B2DRange(fX, fY, fX+fW, fY+fH); + } + else // try to resolve relative values + { + if (!bXIsAbsolute || !bWidthIsAbsolute) + { + // get width of enclosing svg and resolve percentage in x and width + double fWReference(0.0); + bool bHasFoundWidth(false); + seekReferenceWidth(fWReference, bHasFoundWidth); + // referenced values are already in 'user unit' + if (!bXIsAbsolute && bHasFoundWidth) + { + fX = getX().getNumber() * 0.01 * fWReference; + bXIsAbsolute = true; + } + if (!bWidthIsAbsolute && bHasFoundWidth) + { + fW = (getWidth().isSet() ? getWidth().getNumber() *0.01 : 1.0) * fWReference; + bWidthIsAbsolute = true; + } + } + if (!bYIsAbsolute || !bHeightIsAbsolute) + { + // get height of enclosing svg and resolve percentage in y and height + double fHReference(0.0); + bool bHasFoundHeight(false); + seekReferenceHeight(fHReference, bHasFoundHeight); + // referenced values are already in 'user unit' + if (!bYIsAbsolute && bHasFoundHeight) + { + fY = getY().getNumber() * 0.01 * fHReference; + bYIsAbsolute = true; + } + if (!bHeightIsAbsolute && bHasFoundHeight) + { + fH = (getHeight().isSet() ? getHeight().getNumber() *0.01 : 1.0) * fHReference; + bHeightIsAbsolute = true; + } + } + + if (bXIsAbsolute && bYIsAbsolute && bWidthIsAbsolute && bHeightIsAbsolute) + { + return basegfx::B2DRange(fX, fY, fX+fW, fY+fH); + } + else // relative values could not be resolved, there exists no fallback + { + return SvgNode::getCurrentViewPort(); + } + } + } + else //outermost svg + { + // If width or height is not provided, the default would be 100%, see SVG 1.1 section 5.1.2 + // But here it cannot be resolved and no fallback exists. + // SVG 1.1 defines in section 5.1.2 that x,y has no meaning for the outermost SVG element. + bool bWidthIsAbsolute(getWidth().isSet() && SvgUnit::percent != getWidth().getUnit()); + bool bHeightIsAbsolute(getHeight().isSet() && SvgUnit::percent != getHeight().getUnit()); + if (bWidthIsAbsolute && bHeightIsAbsolute) + { + double fW( getWidth().solveNonPercentage(*this) ); + double fH( getHeight().solveNonPercentage(*this) ); + return basegfx::B2DRange(0.0, 0.0, fW, fH); + } + else // no fallback exists + { + return SvgNode::getCurrentViewPort(); + } + } +// TODO: Is it possible to decompose and use the bounding box of the children, if even the +// outermost svg has no information to resolve percentage? Is it worth, how expensive is it? + + } + } + +} // end of namespace svgio + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |