759 lines
28 KiB
C++
759 lines
28 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 <svgdocument.hxx>
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#include <svgnode.hxx>
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#include <svgstyleattributes.hxx>
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#include <drawinglayer/primitive2d/objectinfoprimitive2d.hxx>
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#include <o3tl/string_view.hxx>
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#include <osl/diagnose.h>
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#include <tools/urlobj.hxx>
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namespace svgio::svgreader
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{
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/// #i125258#
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bool SvgNode::supportsParentStyle() const
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{
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return true;
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}
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const SvgStyleAttributes* SvgNode::getSvgStyleAttributes() const
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{
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return nullptr;
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}
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void SvgNode::addCssStyle(const SvgDocument& rDocument, const OUString& aConcatenated)
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{
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const SvgStyleAttributes* pNew = rDocument.findGlobalCssStyleAttributes(aConcatenated);
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if(pNew)
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{
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// add CssStyle if found
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maCssStyleVector.push_back(pNew);
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}
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}
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namespace {
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std::vector< OUString > parseClass(const SvgNode& rNode)
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{
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std::vector< OUString > aParts;
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// check for 'class' references (a list of entries is allowed)
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if(rNode.getClass())
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{
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const OUString& rClassList = *rNode.getClass();
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const sal_Int32 nLen(rClassList.getLength());
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if(nLen)
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{
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sal_Int32 nPos(0);
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OUStringBuffer aToken;
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while(nPos < nLen)
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{
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const sal_Int32 nInitPos(nPos);
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copyToLimiter(rClassList, u' ', nPos, aToken, nLen);
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skip_char(rClassList, u' ', nPos, nLen);
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const OUString aPart(o3tl::trim(aToken));
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aToken.setLength(0);
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if(aPart.getLength())
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{
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aParts.push_back(aPart);
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}
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if(nInitPos == nPos)
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{
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OSL_ENSURE(false, "Could not interpret on current position (!)");
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nPos++;
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}
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}
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}
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}
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return aParts;
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}
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} //namespace
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void SvgNode::fillCssStyleVectorUsingHierarchyAndSelectors(
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const SvgNode& rCurrent,
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std::u16string_view aConcatenated)
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{
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const SvgDocument& rDocument = getDocument();
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if(!rDocument.hasGlobalCssStyleAttributes())
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return;
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const SvgNode* pParent = rCurrent.getParent();
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OUString sCurrentType(SVGTokenToStr(rCurrent.getType()));
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// check for ID (highest priority)
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if(rCurrent.getId())
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{
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const OUString& rId = *rCurrent.getId();
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if(rId.getLength())
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{
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const OUString aNewConcatenated("#" + rId + aConcatenated);
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addCssStyle(rDocument, aNewConcatenated);
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if(!sCurrentType.isEmpty())
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addCssStyle(rDocument, sCurrentType + aNewConcatenated);
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if(pParent)
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{
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// check for combined selectors at parent first so that higher specificity will be in front
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fillCssStyleVectorUsingHierarchyAndSelectors(*pParent, aNewConcatenated);
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}
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}
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}
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std::vector <OUString> aClasses = parseClass(rCurrent);
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for(const auto &aClass : aClasses)
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{
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const OUString aNewConcatenated("." + aClass + aConcatenated);
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addCssStyle(rDocument, aNewConcatenated);
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if(!sCurrentType.isEmpty())
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addCssStyle(rDocument, sCurrentType + aNewConcatenated);
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if(pParent)
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{
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// check for combined selectors at parent first so that higher specificity will be in front
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fillCssStyleVectorUsingHierarchyAndSelectors(*pParent, aNewConcatenated);
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}
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}
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if(!sCurrentType.isEmpty())
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{
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const OUString aNewConcatenated(sCurrentType + aConcatenated);
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addCssStyle(rDocument, aNewConcatenated);
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}
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OUString sType(SVGTokenToStr(getType()));
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// check for class-dependent references to CssStyles
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if(sType.isEmpty())
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return;
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if(pParent)
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{
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// check for combined selectors at parent first so that higher specificity will be in front
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fillCssStyleVectorUsingHierarchyAndSelectors(*pParent, sType);
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}
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}
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void SvgNode::fillCssStyleVectorUsingParent(const SvgNode& rCurrent)
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{
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const SvgDocument& rDocument = getDocument();
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if(!rDocument.hasGlobalCssStyleAttributes())
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return;
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const SvgNode* pParent = rCurrent.getParent();
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if (!pParent)
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return;
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OUString sParentId;
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if (pParent->getId().has_value())
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{
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sParentId = pParent->getId().value();
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}
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std::vector <OUString> aParentClasses = parseClass(*pParent);
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OUString sParentType(SVGTokenToStr(pParent->getType()));
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if(rCurrent.getId())
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{
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const OUString& rId = *rCurrent.getId();
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if(!rId.isEmpty())
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{
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if (!sParentId.isEmpty())
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{
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const OUString aConcatenated("#" + sParentId + ">#" + rId);
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addCssStyle(rDocument, aConcatenated);
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}
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for(const auto &aParentClass : aParentClasses)
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{
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const OUString aConcatenated("." + aParentClass + ">#" + rId);
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addCssStyle(rDocument, aConcatenated);
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}
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if (!sParentType.isEmpty())
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{
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const OUString aConcatenated(sParentType + ">#" + rId);
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addCssStyle(rDocument, aConcatenated);
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}
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}
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}
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std::vector <OUString> aClasses = parseClass(rCurrent);
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for(const auto &aClass : aClasses)
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{
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if (!sParentId.isEmpty())
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{
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const OUString aConcatenated("#" + sParentId + ">." + aClass);
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addCssStyle(rDocument, aConcatenated);
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}
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for(const auto &aParentClass : aParentClasses)
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{
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const OUString aConcatenated("." + aParentClass + ">." + aClass);
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addCssStyle(rDocument, aConcatenated);
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}
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if (!sParentType.isEmpty())
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{
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const OUString aConcatenated(sParentType + ">." + aClass);
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addCssStyle(rDocument, aConcatenated);
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}
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}
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OUString sCurrentType(SVGTokenToStr(getType()));
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if(!sCurrentType.isEmpty())
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{
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if (!sParentId.isEmpty())
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{
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const OUString aConcatenated("#" + sParentId + ">" + sCurrentType);
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addCssStyle(rDocument, aConcatenated);
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}
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for(const auto &aParentClass : aParentClasses)
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{
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const OUString aConcatenated("." + aParentClass + ">" + sCurrentType);
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addCssStyle(rDocument, aConcatenated);
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}
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if (!sParentType.isEmpty())
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{
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const OUString aConcatenated(sParentType + ">" + sCurrentType);
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addCssStyle(rDocument, aConcatenated);
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}
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}
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}
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void SvgNode::fillCssStyleVector(const SvgStyleAttributes& rOriginal)
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{
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OSL_ENSURE(!mbCssStyleVectorBuilt, "OOps, fillCssStyleVector called double ?!?");
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mbCssStyleVectorBuilt = true;
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// #i125293# If we have CssStyles we need to build a linked list of SvgStyleAttributes
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// which represent this for the current object. There are various methods to
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// specify CssStyles which need to be taken into account in a given order:
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// - local CssStyle (independent from global CssStyles at SvgDocument)
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// - 'id' CssStyle
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// - 'class' CssStyle(s)
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// - type-dependent elements (e..g. 'rect' for all rect elements)
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// - Css selector '*'
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// - local attributes (rOriginal)
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// - inherited attributes (up the hierarchy)
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// The first four will be collected in maCssStyleVector for the current element
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// (once, this will not change) and be linked in the needed order using the
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// get/setCssStyle at the SvgStyleAttributes which will be used preferred in
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// member evaluation over the existing parent hierarchy
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// check for local CssStyle with highest priority
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if(mpLocalCssStyle)
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{
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// if we have one, use as first entry
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maCssStyleVector.push_back(mpLocalCssStyle.get());
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}
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// tdf#156038 check for child combinator
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fillCssStyleVectorUsingParent(*this);
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// check the hierarchy for concatenated patterns of Selectors
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fillCssStyleVectorUsingHierarchyAndSelectors(*this, std::u16string_view());
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// tdf#99115, Add css selector '*' style only if the element is on top of the hierarchy
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// meaning its parent is <svg>
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const SvgNode* pParent = this->getParent();
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if(pParent && pParent->getType() == SVGToken::Svg)
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{
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// #i125329# find Css selector '*', add as last element if found
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const SvgStyleAttributes* pNew = getDocument().findGlobalCssStyleAttributes(u"*"_ustr);
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if(pNew)
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{
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// add CssStyle for selector '*' if found
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maCssStyleVector.push_back(pNew);
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}
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}
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//local attributes
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maCssStyleVector.push_back(&rOriginal);
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}
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const SvgStyleAttributes* SvgNode::checkForCssStyle(const SvgStyleAttributes& rOriginal) const
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{
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if(!mbCssStyleVectorBuilt)
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{
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// build needed CssStyleVector for local node
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const_cast< SvgNode* >(this)->fillCssStyleVector(rOriginal);
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}
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if(maCssStyleVector.empty())
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{
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// return given original if no CssStyles found
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return &rOriginal;
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}
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else
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{
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// #i125293# rOriginal will be the last element in the linked list; use no CssStyleParent
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// there (reset it) to ensure that the parent hierarchy will be used when it's base
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// is referenced. This new chaining inserts the CssStyles before the original style,
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// this makes the whole process much safer since the original style when used will
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// be not different to the situation without CssStyles; thus loops which may be caused
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// by trying to use the parent hierarchy of the owner of the style will be avoided
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// already in this mechanism. It's still good to keep the supportsParentStyle
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// from #i125258# in place, though.
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// This chain building using pointers will be done every time when checkForCssStyle
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// is used (not the search, only the chaining). This is needed since the CssStyles
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// themselves will be potentially used multiple times. It is not expensive since it's
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// only changing some pointers.
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// The alternative would be to create the style hierarchy for every element (or even
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// for the element containing the hierarchy) in a vector of pointers and to use that.
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// Resetting the CssStyleParent on rOriginal is probably not needed
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// but simply safer to do.
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// loop over the existing CssStyles and link them. There is a first one, take
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// as current
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SvgStyleAttributes* pCurrent = const_cast< SvgStyleAttributes* >(maCssStyleVector[0]);
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for(size_t a(1); a < maCssStyleVector.size(); a++)
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{
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SvgStyleAttributes* pNext = const_cast< SvgStyleAttributes* >(maCssStyleVector[a]);
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pCurrent->setCssStyle(pNext);
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pCurrent = pNext;
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}
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// return 1st CssStyle as style chain start element (only for the
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// local element, still no hierarchy used here)
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return maCssStyleVector[0];
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}
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}
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SvgNode::SvgNode(
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SVGToken aType,
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SvgDocument& rDocument,
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SvgNode* pParent)
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: maType(aType),
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mrDocument(rDocument),
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mpParent(pParent),
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mpAlternativeParent(nullptr),
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maXmlSpace(XmlSpace::NotSet),
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maDisplay(maType == SVGToken::Unknown ? Display::None : Display::Inline), // tdf#150124: do not display unknown nodes
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mbDecomposing(false),
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mbCssStyleVectorBuilt(false)
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{
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if (pParent)
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{
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pParent->maChildren.emplace_back(this);
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}
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}
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SvgNode::~SvgNode()
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{
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}
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void SvgNode::readLocalCssStyle(std::u16string_view aContent)
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{
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if(!mpLocalCssStyle)
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{
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// create LocalCssStyle if needed but not yet added
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mpLocalCssStyle.reset(new SvgStyleAttributes(*this));
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}
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else
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{
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// 2nd fill would be an error
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OSL_ENSURE(false, "Svg node has two local CssStyles, this may lead to problems (!)");
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}
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if(mpLocalCssStyle)
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{
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// parse and set values to it
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mpLocalCssStyle->readCssStyle(aContent);
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}
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else
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{
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OSL_ENSURE(false, "Could not get/create a local CssStyle for a node (!)");
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}
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}
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void SvgNode::parseAttributes(const css::uno::Reference< css::xml::sax::XAttributeList >& xAttribs)
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{
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// no longer need to pre-sort moving 'style' entries to the back so that
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// values get overwritten - that was the previous, not complete solution for
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// handling the priorities between svg and Css properties
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const sal_uInt32 nAttributes(xAttribs->getLength());
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for(sal_uInt32 a(0); a < nAttributes; a++)
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{
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const OUString aTokenName(xAttribs->getNameByIndex(a));
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const SVGToken aSVGToken(StrToSVGToken(aTokenName, false));
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parseAttribute(aSVGToken, xAttribs->getValueByIndex(a));
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}
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}
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Display getDisplayFromContent(std::u16string_view aContent)
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{
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if(!aContent.empty())
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{
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if(o3tl::equalsIgnoreAsciiCase(o3tl::trim(aContent), u"inline"))
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{
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return Display::Inline;
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}
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else if(o3tl::equalsIgnoreAsciiCase(o3tl::trim(aContent), u"none"))
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{
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return Display::None;
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}
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else if(o3tl::equalsIgnoreAsciiCase(o3tl::trim(aContent), u"inherit"))
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{
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return Display::Inherit;
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}
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else if(o3tl::equalsIgnoreAsciiCase(o3tl::trim(aContent), u"block"))
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{
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return Display::Block;
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}
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else if(o3tl::equalsIgnoreAsciiCase(o3tl::trim(aContent), u"list-item"))
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{
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return Display::ListItem;
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}
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else if(o3tl::equalsIgnoreAsciiCase(o3tl::trim(aContent), u"run-in"))
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{
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return Display::RunIn;
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}
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else if(o3tl::equalsIgnoreAsciiCase(o3tl::trim(aContent), u"compact"))
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{
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return Display::Compact;
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}
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else if(o3tl::equalsIgnoreAsciiCase(o3tl::trim(aContent), u"marker"))
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{
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return Display::Marker;
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}
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else if(o3tl::equalsIgnoreAsciiCase(o3tl::trim(aContent), u"table"))
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{
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return Display::Table;
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}
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else if(o3tl::equalsIgnoreAsciiCase(o3tl::trim(aContent), u"inline-table"))
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{
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return Display::InlineTable;
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}
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else if(o3tl::equalsIgnoreAsciiCase(o3tl::trim(aContent), u"table-row-group"))
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{
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return Display::TableRowGroup;
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}
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else if(o3tl::equalsIgnoreAsciiCase(o3tl::trim(aContent), u"table-header-group"))
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{
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return Display::TableHeaderGroup;
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}
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else if(o3tl::equalsIgnoreAsciiCase(o3tl::trim(aContent), u"table-footer-group"))
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{
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return Display::TableFooterGroup;
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}
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else if(o3tl::equalsIgnoreAsciiCase(o3tl::trim(aContent), u"table-row"))
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{
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return Display::TableRow;
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}
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else if(o3tl::equalsIgnoreAsciiCase(o3tl::trim(aContent), u"table-column-group"))
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{
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return Display::TableColumnGroup;
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}
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else if(o3tl::equalsIgnoreAsciiCase(o3tl::trim(aContent), u"table-column"))
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{
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return Display::TableColumn;
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}
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else if(o3tl::equalsIgnoreAsciiCase(o3tl::trim(aContent), u"table-cell"))
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{
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return Display::TableCell;
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}
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else if(o3tl::equalsIgnoreAsciiCase(o3tl::trim(aContent), u"table-caption"))
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{
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return Display::TableCaption;
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}
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}
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// return the default
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return Display::Inline;
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}
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void SvgNode::parseAttribute(SVGToken aSVGToken, const OUString& aContent)
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{
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switch(aSVGToken)
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{
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case SVGToken::Id:
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{
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if(!aContent.isEmpty())
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{
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setId(aContent);
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}
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break;
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}
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case SVGToken::Class:
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{
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if(!aContent.isEmpty())
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{
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|
setClass(aContent);
|
|
}
|
|
break;
|
|
}
|
|
case SVGToken::SystemLanguage:
|
|
{
|
|
SvgStringVector aSvgStringVector;
|
|
|
|
if (readSvgStringVector(aContent, aSvgStringVector, ','))
|
|
maSystemLanguage = std::move(aSvgStringVector);
|
|
break;
|
|
}
|
|
case SVGToken::XmlSpace:
|
|
{
|
|
if(!aContent.isEmpty())
|
|
{
|
|
if(o3tl::equalsIgnoreAsciiCase(o3tl::trim(aContent), u"default"))
|
|
{
|
|
setXmlSpace(XmlSpace::Default);
|
|
}
|
|
else if(o3tl::equalsIgnoreAsciiCase(o3tl::trim(aContent), u"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);
|
|
}
|
|
}
|
|
|
|
rTarget = drawinglayer::primitive2d::Primitive2DContainer {
|
|
// pack in ObjectInfoPrimitive2D group
|
|
new drawinglayer::primitive2d::ObjectInfoPrimitive2D(
|
|
std::move(rTarget),
|
|
aObjectName,
|
|
rTitle,
|
|
rDesc)
|
|
};
|
|
}
|
|
}
|
|
}
|
|
mbDecomposing = false;
|
|
}
|
|
|
|
basegfx::B2DRange SvgNode::getCurrentViewPort() const
|
|
{
|
|
if(getParent())
|
|
{
|
|
return getParent()->getCurrentViewPort();
|
|
}
|
|
else
|
|
{
|
|
return basegfx::B2DRange(); // return empty B2DRange
|
|
}
|
|
}
|
|
|
|
double SvgNode::getCurrentFontSize() const
|
|
{
|
|
if(getSvgStyleAttributes())
|
|
return getSvgStyleAttributes()->getFontSizeNumber().solve(*this, NumberType::xcoordinate);
|
|
|
|
if(getParent())
|
|
return getParent()->getCurrentFontSize();
|
|
|
|
return 0.0;
|
|
}
|
|
|
|
double SvgNode::getCurrentXHeight() const
|
|
{
|
|
// https://drafts.csswg.org/css-values-4/#ex
|
|
// for XHeight, use 0.5em fallback currently
|
|
// FIXME: use "x-height of the first available font"
|
|
return getCurrentFontSize() * 0.5;
|
|
}
|
|
|
|
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: */
|