diff options
Diffstat (limited to 'svgio/source/svgreader/svgnode.cxx')
| -rw-r--r-- | svgio/source/svgreader/svgnode.cxx | 688 |
1 files changed, 688 insertions, 0 deletions
diff --git a/svgio/source/svgreader/svgnode.cxx b/svgio/source/svgreader/svgnode.cxx new file mode 100644 index 000000000..72f20c22c --- /dev/null +++ b/svgio/source/svgreader/svgnode.cxx @@ -0,0 +1,688 @@ +/* -*- 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 <svgdocument.hxx> +#include <svgnode.hxx> +#include <svgstyleattributes.hxx> +#include <drawinglayer/primitive2d/objectinfoprimitive2d.hxx> +#include <o3tl/string_view.hxx> +#include <osl/diagnose.h> +#include <tools/urlobj.hxx> + + +namespace svgio::svgreader +{ + /// #i125258# + bool SvgNode::supportsParentStyle() const + { + return true; + } + + const SvgStyleAttributes* SvgNode::getSvgStyleAttributes() const + { + return nullptr; + } + + void SvgNode::fillCssStyleVectorUsingHierarchyAndSelectors( + const OUString& rClassStr, + const SvgNode& rCurrent, + const OUString& aConcatenated) + { + const SvgDocument& rDocument = getDocument(); + + if(!rDocument.hasGlobalCssStyleAttributes()) + return; + + const SvgNode* pParent = rCurrent.getParent(); + + // check for ID (highest priority) + if(rCurrent.getId()) + { + const OUString& rId = *rCurrent.getId(); + + if(rId.getLength()) + { + const OUString aNewConcatenated( + "#" + rId + aConcatenated); + + if(pParent) + { + // check for combined selectors at parent firstso that higher specificity will be in front + fillCssStyleVectorUsingHierarchyAndSelectors(rClassStr, *pParent, aNewConcatenated); + } + + const SvgStyleAttributes* pNew = rDocument.findGlobalCssStyleAttributes(aNewConcatenated); + + if(pNew) + { + // add CssStyle if found + maCssStyleVector.push_back(pNew); + } + } + } + + // check for 'class' references (a list of entries is allowed) + if(rCurrent.getClass()) + { + const OUString& rClassList = *rCurrent.getClass(); + const sal_Int32 nLen(rClassList.getLength()); + + if(nLen) + { + std::vector< OUString > aParts; + sal_Int32 nPos(0); + OUStringBuffer aToken; + + while(nPos < nLen) + { + const sal_Int32 nInitPos(nPos); + copyToLimiter(rClassList, u' ', nPos, aToken, nLen); + skip_char(rClassList, u' ', nPos, nLen); + const OUString aPart(aToken.makeStringAndClear().trim()); + + if(aPart.getLength()) + { + aParts.push_back(aPart); + } + + if(nInitPos == nPos) + { + OSL_ENSURE(false, "Could not interpret on current position (!)"); + nPos++; + } + } + + for(const auto &a : aParts) + { + const OUString aNewConcatenated( + "." + a + aConcatenated); + + if(pParent) + { + // check for combined selectors at parent firstso that higher specificity will be in front + fillCssStyleVectorUsingHierarchyAndSelectors(rClassStr, *pParent, aNewConcatenated); + } + + const SvgStyleAttributes* pNew = rDocument.findGlobalCssStyleAttributes(aNewConcatenated); + + if(pNew) + { + // add CssStyle if found + maCssStyleVector.push_back(pNew); + } + } + } + } + + // check for class-dependent references to CssStyles + if(rClassStr.isEmpty()) + return; + + OUString aNewConcatenated(aConcatenated); + + if(!rCurrent.getId() && !rCurrent.getClass() && 0 == aConcatenated.indexOf(rClassStr)) + { + // no new CssStyle Selector and already starts with rClassStr, do not concatenate; + // we pass an 'empty' node (in the sense of CssStyle Selector) + } + else + { + aNewConcatenated = rClassStr + aConcatenated; + } + + if(pParent) + { + // check for combined selectors at parent firstso that higher specificity will be in front + fillCssStyleVectorUsingHierarchyAndSelectors(rClassStr, *pParent, aNewConcatenated); + } + + const SvgStyleAttributes* pNew = rDocument.findGlobalCssStyleAttributes(aNewConcatenated); + + if(pNew) + { + // add CssStyle if found + maCssStyleVector.push_back(pNew); + } + } + + void SvgNode::fillCssStyleVector(const OUString& rClassStr, const SvgStyleAttributes& rOriginal) + { + OSL_ENSURE(!mbCssStyleVectorBuilt, "OOps, fillCssStyleVector called double ?!?"); + mbCssStyleVectorBuilt = true; + + // #i125293# If we have CssStyles we need to build a linked list of SvgStyleAttributes + // which represent this for the current object. There are various methods to + // specify CssStyles which need to be taken into account in a given order: + // - local CssStyle (independent from global CssStyles at SvgDocument) + // - 'id' CssStyle + // - 'class' CssStyle(s) + // - type-dependent elements (e..g. 'rect' for all rect elements) + // - Css selector '*' + // - local attributes (rOriginal) + // - inherited attributes (up the hierarchy) + // The first four will be collected in maCssStyleVector for the current element + // (once, this will not change) and be linked in the needed order using the + // get/setCssStyleParent at the SvgStyleAttributes which will be used preferred in + // member evaluation over the existing parent hierarchy + + // check for local CssStyle with highest priority + if(mpLocalCssStyle) + { + // if we have one, use as first entry + maCssStyleVector.push_back(mpLocalCssStyle.get()); + } + + // check the hierarchy for concatenated patterns of Selectors + fillCssStyleVectorUsingHierarchyAndSelectors(rClassStr, *this, OUString()); + + // tdf#99115, Add css selector '*' style only if the element is on top of the hierarchy + // meaning its parent is <svg> + const SvgNode* pParent = this->getParent(); + + if(pParent && pParent->getType() == SVGToken::Svg) + { + // #i125329# find Css selector '*', add as last element if found + const SvgStyleAttributes* pNew = getDocument().findGlobalCssStyleAttributes("*"); + + if(pNew) + { + // add CssStyle for selector '*' if found + maCssStyleVector.push_back(pNew); + } + } + + //local attributes + maCssStyleVector.push_back(&rOriginal); + } + + const SvgStyleAttributes* SvgNode::checkForCssStyle(const OUString& rClassStr, const SvgStyleAttributes& rOriginal) const + { + if(!mbCssStyleVectorBuilt) + { + // build needed CssStyleVector for local node + const_cast< SvgNode* >(this)->fillCssStyleVector(rClassStr, rOriginal); + } + + if(maCssStyleVector.empty()) + { + // return given original if no CssStyles found + return &rOriginal; + } + else + { + // #i125293# rOriginal will be the last element in the linked list; use no CssStyleParent + // there (reset it) to ensure that the parent hierarchy will be used when it's base + // is referenced. This new chaining inserts the CssStyles before the original style, + // this makes the whole process much safer since the original style when used will + // be not different to the situation without CssStyles; thus loops which may be caused + // by trying to use the parent hierarchy of the owner of the style will be avoided + // already in this mechanism. It's still good to keep the supportsParentStyle + // from #i125258# in place, though. + // This chain building using pointers will be done every time when checkForCssStyle + // is used (not the search, only the chaining). This is needed since the CssStyles + // themselves will be potentially used multiple times. It is not expensive since it's + // only changing some pointers. + // The alternative would be to create the style hierarchy for every element (or even + // for the element containing the hierarchy) in a vector of pointers and to use that. + // Resetting the CssStyleParent on rOriginal is probably not needed + // but simply safer to do. + + // loop over the existing CssStyles and link them. There is a first one, take + // as current + SvgStyleAttributes* pCurrent = const_cast< SvgStyleAttributes* >(maCssStyleVector[0]); + + for(size_t a(1); a < maCssStyleVector.size(); a++) + { + SvgStyleAttributes* pNext = const_cast< SvgStyleAttributes* >(maCssStyleVector[a]); + + pCurrent->setCssStyleParent(pNext); + pCurrent = pNext; + } + + // return 1st CssStyle as style chain start element (only for the + // local element, still no hierarchy used here) + return maCssStyleVector[0]; + } + } + + SvgNode::SvgNode( + SVGToken aType, + SvgDocument& rDocument, + SvgNode* pParent) + : maType(aType), + mrDocument(rDocument), + mpParent(pParent), + mpAlternativeParent(nullptr), + maXmlSpace(XmlSpace::NotSet), + maDisplay(Display::Inline), + mbDecomposing(false), + mbCssStyleVectorBuilt(false) + { + OSL_ENSURE(SVGToken::Unknown != maType, "SvgNode with unknown type created (!)"); + + if(pParent) + { + pParent->maChildren.emplace_back(this); + } + else + { +#ifdef DBG_UTIL + if(SVGToken::Svg != getType()) + { + OSL_ENSURE(false, "No parent for this node (!)"); + } +#endif + } + } + + SvgNode::~SvgNode() + { + } + + void SvgNode::readLocalCssStyle(const OUString& aContent) + { + if(!mpLocalCssStyle) + { + // create LocalCssStyle if needed but not yet added + mpLocalCssStyle.reset(new SvgStyleAttributes(*this)); + } + else + { + // 2nd fill would be an error + OSL_ENSURE(false, "Svg node has two local CssStyles, this may lead to problems (!)"); + } + + if(mpLocalCssStyle) + { + // parse and set values to it + mpLocalCssStyle->readCssStyle(aContent); + } + else + { + OSL_ENSURE(false, "Could not get/create a local CssStyle for a node (!)"); + } + } + + void SvgNode::parseAttributes(const css::uno::Reference< css::xml::sax::XAttributeList >& xAttribs) + { + // no longer need to pre-sort moving 'style' entries to the back so that + // values get overwritten - that was the previous, not complete solution for + // handling the priorities between svg and Css properties + const sal_uInt32 nAttributes(xAttribs->getLength()); + + for(sal_uInt32 a(0); a < nAttributes; a++) + { + const OUString aTokenName(xAttribs->getNameByIndex(a)); + const SVGToken aSVGToken(StrToSVGToken(aTokenName, false)); + + parseAttribute(aTokenName, aSVGToken, xAttribs->getValueByIndex(a)); + } + } + + Display getDisplayFromContent(std::u16string_view aContent) + { + if(!aContent.empty()) + { + if(o3tl::starts_with(aContent, u"inline")) + { + return Display::Inline; + } + else if(o3tl::starts_with(aContent, u"none")) + { + return Display::None; + } + else if(o3tl::starts_with(aContent, u"inherit")) + { + return Display::Inherit; + } + else if(o3tl::starts_with(aContent, u"block")) + { + return Display::Block; + } + else if(o3tl::starts_with(aContent, u"list-item")) + { + return Display::ListItem; + } + else if(o3tl::starts_with(aContent, u"run-in")) + { + return Display::RunIn; + } + else if(o3tl::starts_with(aContent, u"compact")) + { + return Display::Compact; + } + else if(o3tl::starts_with(aContent, u"marker")) + { + return Display::Marker; + } + else if(o3tl::starts_with(aContent, u"table")) + { + return Display::Table; + } + else if(o3tl::starts_with(aContent, u"inline-table")) + { + return Display::InlineTable; + } + else if(o3tl::starts_with(aContent, u"table-row-group")) + { + return Display::TableRowGroup; + } + else if(o3tl::starts_with(aContent, u"table-header-group")) + { + return Display::TableHeaderGroup; + } + else if(o3tl::starts_with(aContent, u"table-footer-group")) + { + return Display::TableFooterGroup; + } + else if(o3tl::starts_with(aContent, u"table-row")) + { + return Display::TableRow; + } + else if(o3tl::starts_with(aContent, u"table-column-group")) + { + return Display::TableColumnGroup; + } + else if(o3tl::starts_with(aContent, u"table-column")) + { + return Display::TableColumn; + } + else if(o3tl::starts_with(aContent, u"table-cell")) + { + return Display::TableCell; + } + else if(o3tl::starts_with(aContent, u"table-caption")) + { + return Display::TableCaption; + } + } + + // return the default + return Display::Inline; + } + + void SvgNode::parseAttribute(const OUString& /*rTokenName*/, SVGToken aSVGToken, const OUString& aContent) + { + switch(aSVGToken) + { + case SVGToken::Id: + { + if(!aContent.isEmpty()) + { + setId(aContent); + } + break; + } + case SVGToken::Class: + { + if(!aContent.isEmpty()) + { + setClass(aContent); + } + break; + } + case SVGToken::XmlSpace: + { + if(!aContent.isEmpty()) + { + if(aContent.startsWith("default")) + { + setXmlSpace(XmlSpace::Default); + } + else if(aContent.startsWith("preserve")) + { + setXmlSpace(XmlSpace::Preserve); + } + } + break; + } + case SVGToken::Display: + { + if(!aContent.isEmpty()) + { + setDisplay(getDisplayFromContent(aContent)); + } + break; + } + default: + { + break; + } + } + } + + void SvgNode::decomposeSvgNode(drawinglayer::primitive2d::Primitive2DContainer& rTarget, bool bReferenced) const + { + if (mbDecomposing) //guard against infinite recurse + return; + + if(Display::None == getDisplay()) + { + return; + } + + if(!bReferenced) + { + if(SVGToken::Defs == getType() || + SVGToken::Symbol == getType() || + SVGToken::ClipPathNode == getType() || + SVGToken::Mask == getType() || + SVGToken::Marker == getType() || + SVGToken::Pattern == getType()) + { + // do not decompose defs or symbol nodes (these hold only style-like + // objects which may be used by referencing them) except when doing + // so controlled referenced + + // also do not decompose ClipPaths and Masks. These should be embedded + // in a defs node (which gets not decomposed by itself), but you never + // know + + // also not directly used are Markers and Patterns, only indirectly used + // by reference + + // #i121656# also do not decompose nodes which have display="none" set + // as property + return; + } + } + + const auto& rChildren = getChildren(); + + if(rChildren.empty()) + return; + + mbDecomposing = true; + + const sal_uInt32 nCount(rChildren.size()); + + for(sal_uInt32 a(0); a < nCount; a++) + { + SvgNode* pCandidate = rChildren[a].get(); + + if(pCandidate && Display::None != pCandidate->getDisplay()) + { + const auto& rGrandChildren = pCandidate->getChildren(); + const SvgStyleAttributes* pChildStyles = pCandidate->getSvgStyleAttributes(); + // decompose: + // - visible terminal nodes + // - all non-terminal nodes (might contain visible nodes down the hierarchy) + if( !rGrandChildren.empty() || ( pChildStyles && (Visibility::visible == pChildStyles->getVisibility())) ) + { + drawinglayer::primitive2d::Primitive2DContainer aNewTarget; + pCandidate->decomposeSvgNode(aNewTarget, bReferenced); + + if(!aNewTarget.empty()) + { + rTarget.append(aNewTarget); + } + } + } + else if(!pCandidate) + { + OSL_ENSURE(false, "Null-Pointer in child node list (!)"); + } + } + + if(!rTarget.empty()) + { + const SvgStyleAttributes* pStyles = getSvgStyleAttributes(); + if(pStyles) + { + // check if we have Title or Desc + const OUString& rTitle = pStyles->getTitle(); + const OUString& rDesc = pStyles->getDesc(); + + if(!rTitle.isEmpty() || !rDesc.isEmpty()) + { + // default object name is empty + OUString aObjectName; + + // use path as object name when outmost element + if (SVGToken::Svg == getType()) + { + aObjectName = getDocument().getAbsolutePath(); + + if(!aObjectName.isEmpty()) + { + INetURLObject aURL(aObjectName); + + aObjectName = aURL.getName( + INetURLObject::LAST_SEGMENT, + true, + INetURLObject::DecodeMechanism::WithCharset); + } + } + + // pack in ObjectInfoPrimitive2D group + drawinglayer::primitive2d::Primitive2DReference xRef( + new drawinglayer::primitive2d::ObjectInfoPrimitive2D( + std::move(rTarget), + aObjectName, + rTitle, + rDesc)); + + rTarget = drawinglayer::primitive2d::Primitive2DContainer { xRef }; + } + } + } + mbDecomposing = false; + } + + basegfx::B2DRange SvgNode::getCurrentViewPort() const + { + if(getParent()) + { + return getParent()->getCurrentViewPort(); + } + else + { + return basegfx::B2DRange(); // return empty B2DRange + } + } + + double SvgNode::getCurrentFontSizeInherited() const + { + if(getParent()) + { + return getParent()->getCurrentFontSize(); + } + else + { + return 0.0; + } + } + + double SvgNode::getCurrentFontSize() const + { + if(getSvgStyleAttributes()) + return getSvgStyleAttributes()->getFontSizeNumber().solve(*this, NumberType::xcoordinate); + + return getCurrentFontSizeInherited(); + } + + double SvgNode::getCurrentXHeightInherited() const + { + if(getParent()) + { + return getParent()->getCurrentXHeight(); + } + else + { + return 0.0; + } + } + + double SvgNode::getCurrentXHeight() const + { + if(getSvgStyleAttributes()) + // for XHeight, use FontSize currently + return getSvgStyleAttributes()->getFontSizeNumber().solve(*this, NumberType::ycoordinate); + + return getCurrentXHeightInherited(); + } + + void SvgNode::setId(OUString const & rId) + { + if(mpId) + { + mrDocument.removeSvgNodeFromMapper(*mpId); + mpId.reset(); + } + + mpId = rId; + mrDocument.addSvgNodeToMapper(*mpId, *this); + } + + void SvgNode::setClass(OUString const & rClass) + { + if(mpClass) + { + mrDocument.removeSvgNodeFromMapper(*mpClass); + mpClass.reset(); + } + + mpClass = rClass; + mrDocument.addSvgNodeToMapper(*mpClass, *this); + } + + XmlSpace SvgNode::getXmlSpace() const + { + if(maXmlSpace != XmlSpace::NotSet) + { + return maXmlSpace; + } + + if(getParent()) + { + return getParent()->getXmlSpace(); + } + + // default is XmlSpace::Default + return XmlSpace::Default; + } + + void SvgNode::accept(Visitor & rVisitor) + { + rVisitor.visit(*this); + } +} // end of namespace svgio + + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |