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|
/* -*- 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::addCssStyle(const SvgDocument& rDocument, const OUString& aConcatenated)
{
const SvgStyleAttributes* pNew = rDocument.findGlobalCssStyleAttributes(aConcatenated);
if(pNew)
{
// add CssStyle if found
maCssStyleVector.push_back(pNew);
}
}
namespace {
std::vector< OUString > parseClass(const SvgNode& rNode)
{
std::vector< OUString > aParts;
// check for 'class' references (a list of entries is allowed)
if(rNode.getClass())
{
const OUString& rClassList = *rNode.getClass();
const sal_Int32 nLen(rClassList.getLength());
if(nLen)
{
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(o3tl::trim(aToken));
aToken.setLength(0);
if(aPart.getLength())
{
aParts.push_back(aPart);
}
if(nInitPos == nPos)
{
OSL_ENSURE(false, "Could not interpret on current position (!)");
nPos++;
}
}
}
}
return aParts;
}
} //namespace
void SvgNode::fillCssStyleVectorUsingHierarchyAndSelectors(
const SvgNode& rCurrent,
std::u16string_view aConcatenated)
{
const SvgDocument& rDocument = getDocument();
if(!rDocument.hasGlobalCssStyleAttributes())
return;
const SvgNode* pParent = rCurrent.getParent();
OUString sCurrentType(SVGTokenToStr(rCurrent.getType()));
// check for ID (highest priority)
if(rCurrent.getId())
{
const OUString& rId = *rCurrent.getId();
if(rId.getLength())
{
const OUString aNewConcatenated("#" + rId + aConcatenated);
addCssStyle(rDocument, aNewConcatenated);
if(!sCurrentType.isEmpty())
addCssStyle(rDocument, sCurrentType + aNewConcatenated);
if(pParent)
{
// check for combined selectors at parent first so that higher specificity will be in front
fillCssStyleVectorUsingHierarchyAndSelectors(*pParent, aNewConcatenated);
}
}
}
std::vector <OUString> aClasses = parseClass(rCurrent);
for(const auto &aClass : aClasses)
{
const OUString aNewConcatenated("." + aClass + aConcatenated);
addCssStyle(rDocument, aNewConcatenated);
if(!sCurrentType.isEmpty())
addCssStyle(rDocument, sCurrentType + aNewConcatenated);
if(pParent)
{
// check for combined selectors at parent first so that higher specificity will be in front
fillCssStyleVectorUsingHierarchyAndSelectors(*pParent, aNewConcatenated);
}
}
if(!sCurrentType.isEmpty())
{
const OUString aNewConcatenated(sCurrentType + aConcatenated);
addCssStyle(rDocument, aNewConcatenated);
}
OUString sType(SVGTokenToStr(getType()));
// check for class-dependent references to CssStyles
if(sType.isEmpty())
return;
if(pParent)
{
// check for combined selectors at parent first so that higher specificity will be in front
fillCssStyleVectorUsingHierarchyAndSelectors(*pParent, sType);
}
}
void SvgNode::fillCssStyleVectorUsingParent(const SvgNode& rCurrent)
{
const SvgDocument& rDocument = getDocument();
if(!rDocument.hasGlobalCssStyleAttributes())
return;
const SvgNode* pParent = rCurrent.getParent();
if (!pParent)
return;
OUString sParentId;
if (pParent->getId().has_value())
{
sParentId = pParent->getId().value();
}
std::vector <OUString> aParentClasses = parseClass(*pParent);
OUString sParentType(SVGTokenToStr(pParent->getType()));
if(rCurrent.getId())
{
const OUString& rId = *rCurrent.getId();
if(!rId.isEmpty())
{
if (!sParentId.isEmpty())
{
const OUString aConcatenated("#" + sParentId + ">#" + rId);
addCssStyle(rDocument, aConcatenated);
}
for(const auto &aParentClass : aParentClasses)
{
const OUString aConcatenated("." + aParentClass + ">#" + rId);
addCssStyle(rDocument, aConcatenated);
}
if (!sParentType.isEmpty())
{
const OUString aConcatenated(sParentType + ">#" + rId);
addCssStyle(rDocument, aConcatenated);
}
}
}
std::vector <OUString> aClasses = parseClass(rCurrent);
for(const auto &aClass : aClasses)
{
if (!sParentId.isEmpty())
{
const OUString aConcatenated("#" + sParentId + ">." + aClass);
addCssStyle(rDocument, aConcatenated);
}
for(const auto &aParentClass : aParentClasses)
{
const OUString aConcatenated("." + aParentClass + ">." + aClass);
addCssStyle(rDocument, aConcatenated);
}
if (!sParentType.isEmpty())
{
const OUString aConcatenated(sParentType + ">." + aClass);
addCssStyle(rDocument, aConcatenated);
}
}
OUString sCurrentType(SVGTokenToStr(getType()));
if(!sCurrentType.isEmpty())
{
if (!sParentId.isEmpty())
{
const OUString aConcatenated("#" + sParentId + ">" + sCurrentType);
addCssStyle(rDocument, aConcatenated);
}
for(const auto &aParentClass : aParentClasses)
{
const OUString aConcatenated("." + aParentClass + ">" + sCurrentType);
addCssStyle(rDocument, aConcatenated);
}
if (!sParentType.isEmpty())
{
const OUString aConcatenated(sParentType + ">" + sCurrentType);
addCssStyle(rDocument, aConcatenated);
}
}
}
void SvgNode::fillCssStyleVector(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());
}
// tdf#156038 check for child combinator
fillCssStyleVectorUsingParent(*this);
// check the hierarchy for concatenated patterns of Selectors
fillCssStyleVectorUsingHierarchyAndSelectors(*this, std::u16string_view());
// 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 SvgStyleAttributes& rOriginal) const
{
if(!mbCssStyleVectorBuilt)
{
// build needed CssStyleVector for local node
const_cast< SvgNode* >(this)->fillCssStyleVector(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)
{
if (pParent)
{
// tdf#150124 ignore when parent is unknown
if (pParent->getType() != SVGToken::Unknown)
pParent->maChildren.emplace_back(this);
else
mrDocument.addOrphanNode(this);
}
}
SvgNode::~SvgNode()
{
}
void SvgNode::readLocalCssStyle(std::u16string_view 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(aSVGToken, xAttribs->getValueByIndex(a));
}
}
Display getDisplayFromContent(std::u16string_view aContent)
{
if(!aContent.empty())
{
if(o3tl::equalsIgnoreAsciiCase(o3tl::trim(aContent), u"inline"))
{
return Display::Inline;
}
else if(o3tl::equalsIgnoreAsciiCase(o3tl::trim(aContent), u"none"))
{
return Display::None;
}
else if(o3tl::equalsIgnoreAsciiCase(o3tl::trim(aContent), u"inherit"))
{
return Display::Inherit;
}
else if(o3tl::equalsIgnoreAsciiCase(o3tl::trim(aContent), u"block"))
{
return Display::Block;
}
else if(o3tl::equalsIgnoreAsciiCase(o3tl::trim(aContent), u"list-item"))
{
return Display::ListItem;
}
else if(o3tl::equalsIgnoreAsciiCase(o3tl::trim(aContent), u"run-in"))
{
return Display::RunIn;
}
else if(o3tl::equalsIgnoreAsciiCase(o3tl::trim(aContent), u"compact"))
{
return Display::Compact;
}
else if(o3tl::equalsIgnoreAsciiCase(o3tl::trim(aContent), u"marker"))
{
return Display::Marker;
}
else if(o3tl::equalsIgnoreAsciiCase(o3tl::trim(aContent), u"table"))
{
return Display::Table;
}
else if(o3tl::equalsIgnoreAsciiCase(o3tl::trim(aContent), u"inline-table"))
{
return Display::InlineTable;
}
else if(o3tl::equalsIgnoreAsciiCase(o3tl::trim(aContent), u"table-row-group"))
{
return Display::TableRowGroup;
}
else if(o3tl::equalsIgnoreAsciiCase(o3tl::trim(aContent), u"table-header-group"))
{
return Display::TableHeaderGroup;
}
else if(o3tl::equalsIgnoreAsciiCase(o3tl::trim(aContent), u"table-footer-group"))
{
return Display::TableFooterGroup;
}
else if(o3tl::equalsIgnoreAsciiCase(o3tl::trim(aContent), u"table-row"))
{
return Display::TableRow;
}
else if(o3tl::equalsIgnoreAsciiCase(o3tl::trim(aContent), u"table-column-group"))
{
return Display::TableColumnGroup;
}
else if(o3tl::equalsIgnoreAsciiCase(o3tl::trim(aContent), u"table-column"))
{
return Display::TableColumn;
}
else if(o3tl::equalsIgnoreAsciiCase(o3tl::trim(aContent), u"table-cell"))
{
return Display::TableCell;
}
else if(o3tl::equalsIgnoreAsciiCase(o3tl::trim(aContent), u"table-caption"))
{
return Display::TableCaption;
}
}
// return the default
return Display::Inline;
}
void SvgNode::parseAttribute(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(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
drawinglayer::primitive2d::Primitive2DReference(
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::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
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