/* -*- 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 #include #include #include #include #include #include #include #include #include #include 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 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 // ) 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: */