b24064f2b7
See tdf#42949 for motivation Change-Id: I42475b8e75951d5dcae2fe6b0ad0bca64441e7f5 Reviewed-on: https://gerrit.libreoffice.org/c/core/+/126837 Tested-by: Jenkins Reviewed-by: Miklos Vajna <vmiklos@collabora.com>
643 lines
24 KiB
C++
643 lines
24 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* This file incorporates work covered by the following license notice:
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.apache.org/licenses/LICENSE-2.0 .
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*/
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#include <svgdocumenthandler.hxx>
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#include <svgtoken.hxx>
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#include <svgsvgnode.hxx>
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#include <svggnode.hxx>
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#include <svganode.hxx>
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#include <svgnode.hxx>
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#include <svgpathnode.hxx>
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#include <svgrectnode.hxx>
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#include <svggradientnode.hxx>
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#include <svggradientstopnode.hxx>
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#include <svgsymbolnode.hxx>
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#include <svgusenode.hxx>
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#include <svgcirclenode.hxx>
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#include <svgellipsenode.hxx>
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#include <svglinenode.hxx>
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#include <svgpolynode.hxx>
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#include <svgtextnode.hxx>
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#include <svgcharacternode.hxx>
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#include <svgtspannode.hxx>
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#include <svgtrefnode.hxx>
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#include <svgtextpathnode.hxx>
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#include <svgstylenode.hxx>
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#include <svgimagenode.hxx>
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#include <svgclippathnode.hxx>
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#include <svgmasknode.hxx>
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#include <svgmarkernode.hxx>
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#include <svgpatternnode.hxx>
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#include <svgtitledescnode.hxx>
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#include <sal/log.hxx>
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#include <osl/diagnose.h>
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using namespace com::sun::star;
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namespace svgio::svgreader
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{
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namespace
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{
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svgio::svgreader::SvgCharacterNode* whiteSpaceHandling(svgio::svgreader::SvgNode const * pNode, svgio::svgreader::SvgCharacterNode* pLast)
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{
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if(pNode)
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{
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const auto& rChilds = pNode->getChildren();
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const sal_uInt32 nCount(rChilds.size());
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for(sal_uInt32 a(0); a < nCount; a++)
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{
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svgio::svgreader::SvgNode* pCandidate = rChilds[a].get();
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if(pCandidate)
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{
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switch(pCandidate->getType())
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{
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case SVGToken::Character:
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{
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// clean whitespace in text span
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svgio::svgreader::SvgCharacterNode* pCharNode = static_cast< svgio::svgreader::SvgCharacterNode* >(pCandidate);
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pCharNode->whiteSpaceHandling();
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// pCharNode may have lost all text. If that's the case, ignore
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// as invalid character node
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if(!pCharNode->getText().isEmpty())
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{
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if(pLast)
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{
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bool bAddGap(true);
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static bool bNoGapsForBaselineShift(true); // loplugin:constvars:ignore
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if(bNoGapsForBaselineShift)
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{
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// With this option a baseline shift between two char parts ('words')
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// will not add a space 'gap' to the end of the (non-last) word. This
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// seems to be the standard behaviour, see last bugdoc attached #122524#
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const svgio::svgreader::SvgStyleAttributes* pStyleLast = pLast->getSvgStyleAttributes();
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const svgio::svgreader::SvgStyleAttributes* pStyleCurrent = pCandidate->getSvgStyleAttributes();
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if(pStyleLast && pStyleCurrent && pStyleLast->getBaselineShift() != pStyleCurrent->getBaselineShift())
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{
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bAddGap = false;
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}
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}
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// add in-between whitespace (single space) to last
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// known character node
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if(bAddGap)
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{
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pLast->addGap();
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}
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}
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// remember new last corrected character node
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pLast = pCharNode;
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}
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break;
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}
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case SVGToken::Tspan:
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case SVGToken::TextPath:
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case SVGToken::Tref:
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{
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// recursively clean whitespaces in subhierarchy
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pLast = whiteSpaceHandling(pCandidate, pLast);
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break;
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}
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default:
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{
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OSL_ENSURE(false, "Unexpected token inside SVGTokenText (!)");
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break;
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}
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}
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}
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}
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}
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return pLast;
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}
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} // end anonymous namespace
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SvgDocHdl::SvgDocHdl(const OUString& aAbsolutePath)
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: maDocument(aAbsolutePath),
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mpTarget(nullptr),
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bSkip(false)
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{
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}
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SvgDocHdl::~SvgDocHdl()
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{
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if (mpTarget)
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{
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OSL_ENSURE(false, "SvgDocHdl destructed with active target (!)");
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while (mpTarget->getParent())
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mpTarget = const_cast< SvgNode* >(mpTarget->getParent());
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const SvgNodeVector& rOwnedTopLevels = maDocument.getSvgNodeVector();
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if (std::none_of(rOwnedTopLevels.begin(), rOwnedTopLevels.end(),
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[&](std::unique_ptr<SvgNode> const & p) { return p.get() == mpTarget; }))
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delete mpTarget;
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}
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OSL_ENSURE(maCssContents.empty(), "SvgDocHdl destructed with active css style stack entry (!)");
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}
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void SvgDocHdl::startDocument( )
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{
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OSL_ENSURE(!mpTarget, "Already a target at document start (!)");
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OSL_ENSURE(maCssContents.empty(), "SvgDocHdl startDocument with active css style stack entry (!)");
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}
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void SvgDocHdl::endDocument( )
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{
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OSL_ENSURE(!mpTarget, "Still a target at document end (!)");
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OSL_ENSURE(maCssContents.empty(), "SvgDocHdl endDocument with active css style stack entry (!)");
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}
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void SvgDocHdl::startElement( const OUString& aName, const uno::Reference< xml::sax::XAttributeList >& xAttribs )
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{
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if (bSkip)
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return;
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if(aName.isEmpty())
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return;
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const SVGToken aSVGToken(StrToSVGToken(aName, false));
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switch (aSVGToken)
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{
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/// structural elements
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case SVGToken::Symbol:
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{
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/// new basic node for Symbol. Content gets scanned, but
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/// will not be decomposed (see SvgNode::decomposeSvgNode and bReferenced)
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mpTarget = new SvgSymbolNode(maDocument, mpTarget);
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mpTarget->parseAttributes(xAttribs);
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break;
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}
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case SVGToken::Defs:
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case SVGToken::G:
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{
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/// new node for Defs/G
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mpTarget = new SvgGNode(aSVGToken, maDocument, mpTarget);
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mpTarget->parseAttributes(xAttribs);
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break;
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}
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case SVGToken::Svg:
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{
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/// new node for Svg
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mpTarget = new SvgSvgNode(maDocument, mpTarget);
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mpTarget->parseAttributes(xAttribs);
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break;
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}
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case SVGToken::Use:
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{
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/// new node for Use
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mpTarget = new SvgUseNode(maDocument, mpTarget);
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mpTarget->parseAttributes(xAttribs);
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break;
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}
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case SVGToken::A:
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{
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/// new node for A
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mpTarget = new SvgANode(maDocument, mpTarget);
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mpTarget->parseAttributes(xAttribs);
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break;
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}
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/// shape elements
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case SVGToken::Circle:
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{
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/// new node for Circle
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mpTarget = new SvgCircleNode(maDocument, mpTarget);
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mpTarget->parseAttributes(xAttribs);
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break;
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}
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case SVGToken::Ellipse:
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{
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/// new node for Ellipse
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mpTarget = new SvgEllipseNode(maDocument, mpTarget);
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mpTarget->parseAttributes(xAttribs);
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break;
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}
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case SVGToken::Line:
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{
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/// new node for Line
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mpTarget = new SvgLineNode(maDocument, mpTarget);
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mpTarget->parseAttributes(xAttribs);
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break;
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}
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case SVGToken::Path:
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{
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/// new node for Path
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mpTarget = new SvgPathNode(maDocument, mpTarget);
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mpTarget->parseAttributes(xAttribs);
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break;
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}
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case SVGToken::Polygon:
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{
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/// new node for Polygon
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mpTarget = new SvgPolyNode(maDocument, mpTarget, false);
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mpTarget->parseAttributes(xAttribs);
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break;
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}
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case SVGToken::Polyline:
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{
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/// new node for Polyline
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mpTarget = new SvgPolyNode(maDocument, mpTarget, true);
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mpTarget->parseAttributes(xAttribs);
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break;
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}
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case SVGToken::Rect:
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{
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/// new node for Rect
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mpTarget = new SvgRectNode(maDocument, mpTarget);
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mpTarget->parseAttributes(xAttribs);
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break;
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}
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case SVGToken::Image:
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{
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/// new node for Image
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mpTarget = new SvgImageNode(maDocument, mpTarget);
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mpTarget->parseAttributes(xAttribs);
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break;
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}
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/// title and description
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case SVGToken::Title:
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case SVGToken::Desc:
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{
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/// new node for Title and/or Desc
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mpTarget = new SvgTitleDescNode(aSVGToken, maDocument, mpTarget);
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break;
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}
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/// gradients
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case SVGToken::LinearGradient:
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case SVGToken::RadialGradient:
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{
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mpTarget = new SvgGradientNode(aSVGToken, maDocument, mpTarget);
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mpTarget->parseAttributes(xAttribs);
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break;
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}
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/// gradient stops
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case SVGToken::Stop:
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{
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mpTarget = new SvgGradientStopNode(maDocument, mpTarget);
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mpTarget->parseAttributes(xAttribs);
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break;
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}
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/// text
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case SVGToken::Text:
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{
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mpTarget = new SvgTextNode(maDocument, mpTarget);
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mpTarget->parseAttributes(xAttribs);
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break;
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}
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case SVGToken::Tspan:
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{
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mpTarget = new SvgTspanNode(maDocument, mpTarget);
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mpTarget->parseAttributes(xAttribs);
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break;
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}
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case SVGToken::Tref:
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{
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mpTarget = new SvgTrefNode(maDocument, mpTarget);
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mpTarget->parseAttributes(xAttribs);
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break;
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}
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case SVGToken::TextPath:
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{
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mpTarget = new SvgTextPathNode(maDocument, mpTarget);
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mpTarget->parseAttributes(xAttribs);
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break;
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}
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/// styles (as stylesheets)
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case SVGToken::Style:
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{
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SvgStyleNode* pNew = new SvgStyleNode(maDocument, mpTarget);
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mpTarget = pNew;
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const sal_uInt32 nAttributes(xAttribs->getLength());
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if(0 == nAttributes)
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{
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// #i125326# no attributes, thus also no type="text/css". This is allowed to be missing,
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// thus do mark this style as CssStyle. This is required to read the contained
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// text (which defines the css style)
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pNew->setTextCss(true);
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}
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else
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{
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// #i125326# there are attributes, read them. This will set isTextCss to true if
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// a type="text/css" is contained as exact match, else not
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mpTarget->parseAttributes(xAttribs);
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}
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if(pNew->isTextCss())
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{
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// if it is a Css style, allow reading text between the start and end tag (see
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// SvgDocHdl::characters for details)
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maCssContents.emplace_back();
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}
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break;
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}
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/// structural elements clip-path and mask. Content gets scanned, but
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/// will not be decomposed (see SvgNode::decomposeSvgNode and bReferenced)
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case SVGToken::ClipPathNode:
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{
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/// new node for ClipPath
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mpTarget = new SvgClipPathNode(maDocument, mpTarget);
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mpTarget->parseAttributes(xAttribs);
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break;
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}
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case SVGToken::Mask:
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{
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/// new node for Mask
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mpTarget = new SvgMaskNode(maDocument, mpTarget);
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mpTarget->parseAttributes(xAttribs);
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break;
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}
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/// structural element marker
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case SVGToken::Marker:
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{
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/// new node for marker
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mpTarget = new SvgMarkerNode(maDocument, mpTarget);
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mpTarget->parseAttributes(xAttribs);
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break;
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}
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/// structural element pattern
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case SVGToken::Pattern:
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{
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/// new node for pattern
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mpTarget = new SvgPatternNode(maDocument, mpTarget);
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mpTarget->parseAttributes(xAttribs);
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break;
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}
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// ignore FlowRoot and child nodes
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case SVGToken::FlowRoot:
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{
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bSkip = true;
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break;
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}
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default:
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{
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/// invalid token, ignore
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SAL_INFO( "svgio", "Unknown Base SvgToken <" + aName + "> (!)" );
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break;
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}
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}
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}
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void SvgDocHdl::endElement( const OUString& aName )
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{
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if(aName.isEmpty())
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return;
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const SVGToken aSVGToken(StrToSVGToken(aName, false));
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SvgNode* pWhitespaceCheck(SVGToken::Text == aSVGToken ? mpTarget : nullptr);
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SvgStyleNode* pCssStyle(SVGToken::Style == aSVGToken ? static_cast< SvgStyleNode* >(mpTarget) : nullptr);
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SvgTitleDescNode* pSvgTitleDescNode(SVGToken::Title == aSVGToken || SVGToken::Desc == aSVGToken ? static_cast< SvgTitleDescNode* >(mpTarget) : nullptr);
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// if we are in skipping mode and we reach the flowRoot end tag: stop skipping mode
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if(bSkip && aSVGToken == SVGToken::FlowRoot)
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bSkip = false;
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// we are in skipping mode: do nothing until we found the flowRoot end tag
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else if(bSkip)
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return;
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switch (aSVGToken)
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{
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/// valid tokens for which a new one was created
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/// structural elements
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case SVGToken::Defs:
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case SVGToken::G:
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case SVGToken::Svg:
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case SVGToken::Symbol:
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case SVGToken::Use:
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case SVGToken::A:
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/// shape elements
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case SVGToken::Circle:
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case SVGToken::Ellipse:
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case SVGToken::Line:
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case SVGToken::Path:
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case SVGToken::Polygon:
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case SVGToken::Polyline:
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case SVGToken::Rect:
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case SVGToken::Image:
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/// title and description
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case SVGToken::Title:
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case SVGToken::Desc:
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/// gradients
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case SVGToken::LinearGradient:
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case SVGToken::RadialGradient:
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/// gradient stops
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case SVGToken::Stop:
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/// text
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case SVGToken::Text:
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case SVGToken::Tspan:
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case SVGToken::TextPath:
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case SVGToken::Tref:
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/// styles (as stylesheets)
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case SVGToken::Style:
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/// structural elements clip-path and mask
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case SVGToken::ClipPathNode:
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case SVGToken::Mask:
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/// structural element marker
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case SVGToken::Marker:
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/// structural element pattern
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case SVGToken::Pattern:
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/// content handling after parsing
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{
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if(mpTarget)
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{
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if(!mpTarget->getParent())
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{
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// last element closing, save this tree
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maDocument.appendNode(std::unique_ptr<SvgNode>(mpTarget));
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}
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mpTarget = const_cast< SvgNode* >(mpTarget->getParent());
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}
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else
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{
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OSL_ENSURE(false, "Closing token, but no context (!)");
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}
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break;
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}
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default:
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{
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/// invalid token, ignore
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}
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}
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if(pSvgTitleDescNode && mpTarget)
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{
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const OUString& aText(pSvgTitleDescNode->getText());
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if(!aText.isEmpty())
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{
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if(SVGToken::Title == aSVGToken)
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{
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mpTarget->parseAttribute(getStrTitle(), aSVGToken, aText);
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}
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else // if(SVGTokenDesc == aSVGToken)
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{
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mpTarget->parseAttribute(getStrDesc(), aSVGToken, aText);
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}
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}
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}
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if(pCssStyle && pCssStyle->isTextCss())
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{
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// css style parsing
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if(!maCssContents.empty())
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{
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// need to interpret css styles and remember them as StyleSheets
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// #125325# Caution! the Css content may contain block comments
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// (see http://www.w3.org/wiki/CSS_basics#CSS_comments). These need
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// to be removed first
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const OUString aCommentFreeSource(removeBlockComments(*(maCssContents.end() - 1)));
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if(aCommentFreeSource.getLength())
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{
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pCssStyle->addCssStyleSheet(aCommentFreeSource);
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}
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maCssContents.pop_back();
|
|
}
|
|
else
|
|
{
|
|
OSL_ENSURE(false, "Closing CssStyle, but no collector string on stack (!)");
|
|
}
|
|
}
|
|
|
|
if(pWhitespaceCheck)
|
|
{
|
|
// cleanup read strings
|
|
whiteSpaceHandling(pWhitespaceCheck, nullptr);
|
|
}
|
|
}
|
|
|
|
void SvgDocHdl::characters( const OUString& aChars )
|
|
{
|
|
const sal_uInt32 nLength(aChars.getLength());
|
|
|
|
if(!(mpTarget && nLength))
|
|
return;
|
|
|
|
switch(mpTarget->getType())
|
|
{
|
|
case SVGToken::Text:
|
|
case SVGToken::Tspan:
|
|
case SVGToken::TextPath:
|
|
{
|
|
const auto& rChilds = mpTarget->getChildren();
|
|
SvgCharacterNode* pTarget = nullptr;
|
|
|
|
if(!rChilds.empty())
|
|
{
|
|
pTarget = dynamic_cast< SvgCharacterNode* >(rChilds[rChilds.size() - 1].get());
|
|
}
|
|
|
|
if(pTarget)
|
|
{
|
|
// concatenate to current character span
|
|
pTarget->concatenate(aChars);
|
|
}
|
|
else
|
|
{
|
|
// add character span as simplified tspan (no arguments)
|
|
// as direct child of SvgTextNode/SvgTspanNode/SvgTextPathNode
|
|
new SvgCharacterNode(maDocument, mpTarget, aChars);
|
|
}
|
|
break;
|
|
}
|
|
case SVGToken::Style:
|
|
{
|
|
SvgStyleNode& rSvgStyleNode = static_cast< SvgStyleNode& >(*mpTarget);
|
|
|
|
if(rSvgStyleNode.isTextCss())
|
|
{
|
|
// collect characters for css style
|
|
if(!maCssContents.empty())
|
|
{
|
|
const OUString aTrimmedChars(aChars.trim());
|
|
|
|
if(!aTrimmedChars.isEmpty())
|
|
{
|
|
std::vector< OUString >::iterator aString(maCssContents.end() - 1);
|
|
(*aString) += aTrimmedChars;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
OSL_ENSURE(false, "Closing CssStyle, but no collector string on stack (!)");
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
case SVGToken::Title:
|
|
case SVGToken::Desc:
|
|
{
|
|
SvgTitleDescNode& rSvgTitleDescNode = static_cast< SvgTitleDescNode& >(*mpTarget);
|
|
|
|
// add text directly to SvgTitleDescNode
|
|
rSvgTitleDescNode.concatenate(aChars);
|
|
break;
|
|
}
|
|
default:
|
|
{
|
|
// characters not used by a known node
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
void SvgDocHdl::ignorableWhitespace(const OUString& /*aWhitespaces*/)
|
|
{
|
|
}
|
|
|
|
void SvgDocHdl::processingInstruction(const OUString& /*aTarget*/, const OUString& /*aData*/)
|
|
{
|
|
}
|
|
|
|
void SvgDocHdl::setDocumentLocator(const uno::Reference< xml::sax::XLocator >& /*xLocator*/)
|
|
{
|
|
}
|
|
} // end of namespace svgio
|
|
|
|
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
|