Adding upstream version 4:7.4.7.upstream/4%7.4.7upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 607 insertions, 0 deletions

diff --git a/svgio/source/svgreader/svgdocumenthandler.cxx b/svgio/source/svgreader/svgdocumenthandler.cxx
new file mode 100644
index 000000000..dc2dd6fa7
--- /dev/null
+++ b/svgio/source/svgreader/svgdocumenthandler.cxx
@@ -0,0 +1,607 @@
+/* -*- 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 <svgdocumenthandler.hxx>
+#include <svgtoken.hxx>
+#include <svgsvgnode.hxx>
+#include <svggnode.hxx>
+#include <svganode.hxx>
+#include <svgnode.hxx>
+#include <svgpathnode.hxx>
+#include <svgrectnode.hxx>
+#include <svggradientnode.hxx>
+#include <svggradientstopnode.hxx>
+#include <svgsymbolnode.hxx>
+#include <svgusenode.hxx>
+#include <svgcirclenode.hxx>
+#include <svgellipsenode.hxx>
+#include <svglinenode.hxx>
+#include <svgpolynode.hxx>
+#include <svgtextnode.hxx>
+#include <svgcharacternode.hxx>
+#include <svgtspannode.hxx>
+#include <svgtrefnode.hxx>
+#include <svgtextpathnode.hxx>
+#include <svgstylenode.hxx>
+#include <svgimagenode.hxx>
+#include <svgclippathnode.hxx>
+#include <svgmasknode.hxx>
+#include <svgmarkernode.hxx>
+#include <svgpatternnode.hxx>
+#include <svgtitledescnode.hxx>
+#include <sal/log.hxx>
+#include <osl/diagnose.h>
+
+using namespace com::sun::star;
+
+namespace svgio::svgreader
+{
+
+namespace
+{
+    void whiteSpaceHandling(svgio::svgreader::SvgNode const * pNode)
+    {
+        if(pNode)
+        {
+            const auto& rChilds = pNode->getChildren();
+            const sal_uInt32 nCount(rChilds.size());
+
+            for(sal_uInt32 a(0); a < nCount; a++)
+            {
+                svgio::svgreader::SvgNode* pCandidate = rChilds[a].get();
+
+                if(pCandidate)
+                {
+                    switch(pCandidate->getType())
+                    {
+                        case SVGToken::Character:
+                        {
+                            // clean whitespace in text span
+                            svgio::svgreader::SvgCharacterNode* pCharNode = static_cast< svgio::svgreader::SvgCharacterNode* >(pCandidate);
+                            pCharNode->whiteSpaceHandling();
+                            break;
+                        }
+                        case SVGToken::Tspan:
+                        case SVGToken::TextPath:
+                        case SVGToken::Tref:
+                        {
+                            // recursively clean whitespaces in subhierarchy
+                            whiteSpaceHandling(pCandidate);
+                            break;
+                        }
+                        default:
+                        {
+                            OSL_ENSURE(false, "Unexpected token inside SVGTokenText (!)");
+                            break;
+                        }
+                    }
+                }
+            }
+        }
+    }
+
+} // end anonymous namespace
+
+        SvgDocHdl::SvgDocHdl(const OUString& aAbsolutePath)
+        :   maDocument(aAbsolutePath),
+            mpTarget(nullptr),
+            bSkip(false)
+        {
+        }
+
+        SvgDocHdl::~SvgDocHdl()
+        {
+            if (mpTarget)
+            {
+                OSL_ENSURE(false, "SvgDocHdl destructed with active target (!)");
+
+                while (mpTarget->getParent())
+                    mpTarget = const_cast< SvgNode* >(mpTarget->getParent());
+
+                const SvgNodeVector& rOwnedTopLevels = maDocument.getSvgNodeVector();
+                if (std::none_of(rOwnedTopLevels.begin(), rOwnedTopLevels.end(),
+                                [&](std::unique_ptr<SvgNode> const & p) { return p.get() == mpTarget; }))
+                    delete mpTarget;
+            }
+            OSL_ENSURE(maCssContents.empty(), "SvgDocHdl destructed with active css style stack entry (!)");
+        }
+
+        void SvgDocHdl::startDocument(  )
+        {
+            OSL_ENSURE(!mpTarget, "Already a target at document start (!)");
+            OSL_ENSURE(maCssContents.empty(), "SvgDocHdl startDocument with active css style stack entry (!)");
+        }
+
+        void SvgDocHdl::endDocument(  )
+        {
+            OSL_ENSURE(!mpTarget, "Still a target at document end (!)");
+            OSL_ENSURE(maCssContents.empty(), "SvgDocHdl endDocument with active css style stack entry (!)");
+        }
+
+        void SvgDocHdl::startElement( const OUString& aName, const uno::Reference< xml::sax::XAttributeList >& xAttribs )
+        {
+            if (bSkip)
+                return;
+            if(aName.isEmpty())
+                return;
+
+            const SVGToken aSVGToken(StrToSVGToken(aName, false));
+
+            switch (aSVGToken)
+            {
+                /// structural elements
+                case SVGToken::Symbol:
+                {
+                    /// new basic node for Symbol. Content gets scanned, but
+                    /// will not be decomposed (see SvgNode::decomposeSvgNode and bReferenced)
+                    mpTarget = new SvgSymbolNode(maDocument, mpTarget);
+                    mpTarget->parseAttributes(xAttribs);
+                    break;
+                }
+                case SVGToken::Defs:
+                case SVGToken::G:
+                {
+                    /// new node for Defs/G
+                    mpTarget = new SvgGNode(aSVGToken, maDocument, mpTarget);
+                    mpTarget->parseAttributes(xAttribs);
+                    break;
+                }
+                case SVGToken::Svg:
+                {
+                    /// new node for Svg
+                    mpTarget = new SvgSvgNode(maDocument, mpTarget);
+                    mpTarget->parseAttributes(xAttribs);
+                    break;
+                }
+                case SVGToken::Use:
+                {
+                    /// new node for Use
+                    mpTarget = new SvgUseNode(maDocument, mpTarget);
+                    mpTarget->parseAttributes(xAttribs);
+                    break;
+                }
+                case SVGToken::A:
+                {
+                    /// new node for A
+                    mpTarget = new SvgANode(maDocument, mpTarget);
+                    mpTarget->parseAttributes(xAttribs);
+                    break;
+                }
+
+                /// shape elements
+                case SVGToken::Circle:
+                {
+                    /// new node for Circle
+                    mpTarget = new SvgCircleNode(maDocument, mpTarget);
+                    mpTarget->parseAttributes(xAttribs);
+                    break;
+                }
+                case SVGToken::Ellipse:
+                {
+                    /// new node for Ellipse
+                    mpTarget = new SvgEllipseNode(maDocument, mpTarget);
+                    mpTarget->parseAttributes(xAttribs);
+                    break;
+                }
+                case SVGToken::Line:
+                {
+                    /// new node for Line
+                    mpTarget = new SvgLineNode(maDocument, mpTarget);
+                    mpTarget->parseAttributes(xAttribs);
+                    break;
+                }
+                case SVGToken::Path:
+                {
+                    /// new node for Path
+                    mpTarget = new SvgPathNode(maDocument, mpTarget);
+                    mpTarget->parseAttributes(xAttribs);
+                    break;
+                }
+                case SVGToken::Polygon:
+                {
+                    /// new node for Polygon
+                    mpTarget = new SvgPolyNode(maDocument, mpTarget, false);
+                    mpTarget->parseAttributes(xAttribs);
+                    break;
+                }
+                case SVGToken::Polyline:
+                {
+                    /// new node for Polyline
+                    mpTarget = new SvgPolyNode(maDocument, mpTarget, true);
+                    mpTarget->parseAttributes(xAttribs);
+                    break;
+                }
+                case SVGToken::Rect:
+                {
+                    /// new node for Rect
+                    mpTarget = new SvgRectNode(maDocument, mpTarget);
+                    mpTarget->parseAttributes(xAttribs);
+                    break;
+                }
+                case SVGToken::Image:
+                {
+                    /// new node for Image
+                    mpTarget = new SvgImageNode(maDocument, mpTarget);
+                    mpTarget->parseAttributes(xAttribs);
+                    break;
+                }
+
+                /// title and description
+                case SVGToken::Title:
+                case SVGToken::Desc:
+                {
+                    /// new node for Title and/or Desc
+                    mpTarget = new SvgTitleDescNode(aSVGToken, maDocument, mpTarget);
+                    break;
+                }
+
+                /// gradients
+                case SVGToken::LinearGradient:
+                case SVGToken::RadialGradient:
+                {
+                    mpTarget = new SvgGradientNode(aSVGToken, maDocument, mpTarget);
+                    mpTarget->parseAttributes(xAttribs);
+                    break;
+                }
+
+                /// gradient stops
+                case SVGToken::Stop:
+                {
+                    mpTarget = new SvgGradientStopNode(maDocument, mpTarget);
+                    mpTarget->parseAttributes(xAttribs);
+                    break;
+                }
+
+                /// text
+                case SVGToken::Text:
+                {
+                    mpTarget = new SvgTextNode(maDocument, mpTarget);
+                    mpTarget->parseAttributes(xAttribs);
+                    break;
+                }
+                case SVGToken::Tspan:
+                {
+                    mpTarget = new SvgTspanNode(maDocument, mpTarget);
+                    mpTarget->parseAttributes(xAttribs);
+                    break;
+                }
+                case SVGToken::Tref:
+                {
+                    mpTarget = new SvgTrefNode(maDocument, mpTarget);
+                    mpTarget->parseAttributes(xAttribs);
+                    break;
+                }
+                case SVGToken::TextPath:
+                {
+                    mpTarget = new SvgTextPathNode(maDocument, mpTarget);
+                    mpTarget->parseAttributes(xAttribs);
+                    break;
+                }
+
+                /// styles (as stylesheets)
+                case SVGToken::Style:
+                {
+                    SvgStyleNode* pNew = new SvgStyleNode(maDocument, mpTarget);
+                    mpTarget = pNew;
+                    const sal_uInt32 nAttributes(xAttribs->getLength());
+
+                    if(0 == nAttributes)
+                    {
+                        // #i125326# no attributes, thus also no type="text/css". This is allowed to be missing,
+                        // thus do mark this style as CssStyle. This is required to read the contained
+                        // text (which defines the css style)
+                        pNew->setTextCss(true);
+                    }
+                    else
+                    {
+                        // #i125326# there are attributes, read them. This will set isTextCss to true if
+                        // a type="text/css" is contained as exact match, else not
+                        mpTarget->parseAttributes(xAttribs);
+                    }
+
+                    if(pNew->isTextCss())
+                    {
+                        // if it is a Css style, allow reading text between the start and end tag (see
+                        // SvgDocHdl::characters for details)
+                        maCssContents.emplace_back();
+                    }
+                    break;
+                }
+
+                /// structural elements clip-path and mask. Content gets scanned, but
+                /// will not be decomposed (see SvgNode::decomposeSvgNode and bReferenced)
+                case SVGToken::ClipPathNode:
+                {
+                    /// new node for ClipPath
+                    mpTarget = new SvgClipPathNode(maDocument, mpTarget);
+                    mpTarget->parseAttributes(xAttribs);
+                    break;
+                }
+                case SVGToken::Mask:
+                {
+                    /// new node for Mask
+                    mpTarget = new SvgMaskNode(maDocument, mpTarget);
+                    mpTarget->parseAttributes(xAttribs);
+                    break;
+                }
+
+                /// structural element marker
+                case SVGToken::Marker:
+                {
+                    /// new node for marker
+                    mpTarget = new SvgMarkerNode(maDocument, mpTarget);
+                    mpTarget->parseAttributes(xAttribs);
+                    break;
+                }
+
+                /// structural element pattern
+                case SVGToken::Pattern:
+                {
+                    /// new node for pattern
+                    mpTarget = new SvgPatternNode(maDocument, mpTarget);
+                    mpTarget->parseAttributes(xAttribs);
+                    break;
+                }
+
+                // ignore FlowRoot and child nodes
+                case SVGToken::FlowRoot:
+                {
+                    bSkip = true;
+                    break;
+                }
+
+                default:
+                {
+                    /// invalid token, ignore
+                    SAL_INFO( "svgio", "Unknown Base SvgToken <" + aName + "> (!)" );
+                    break;
+                }
+            }
+        }
+
+        void SvgDocHdl::endElement( const OUString& aName )
+        {
+            if(aName.isEmpty())
+                return;
+
+            const SVGToken aSVGToken(StrToSVGToken(aName, false));
+            SvgNode* pWhitespaceCheck(SVGToken::Text == aSVGToken ? mpTarget : nullptr);
+            SvgStyleNode* pCssStyle(SVGToken::Style == aSVGToken ? static_cast< SvgStyleNode* >(mpTarget) : nullptr);
+            SvgTitleDescNode* pSvgTitleDescNode(SVGToken::Title == aSVGToken || SVGToken::Desc == aSVGToken ? static_cast< SvgTitleDescNode* >(mpTarget) : nullptr);
+
+            // if we are in skipping mode and we reach the flowRoot end tag: stop skipping mode
+            if(bSkip && aSVGToken == SVGToken::FlowRoot)
+                bSkip = false;
+            // we are in skipping mode: do nothing until we found the flowRoot end tag
+            else if(bSkip)
+                return;
+
+            switch (aSVGToken)
+            {
+                /// valid tokens for which a new one was created
+
+                /// structural elements
+                case SVGToken::Defs:
+                case SVGToken::G:
+                case SVGToken::Svg:
+                case SVGToken::Symbol:
+                case SVGToken::Use:
+                case SVGToken::A:
+
+                /// shape elements
+                case SVGToken::Circle:
+                case SVGToken::Ellipse:
+                case SVGToken::Line:
+                case SVGToken::Path:
+                case SVGToken::Polygon:
+                case SVGToken::Polyline:
+                case SVGToken::Rect:
+                case SVGToken::Image:
+
+                /// title and description
+                case SVGToken::Title:
+                case SVGToken::Desc:
+
+                /// gradients
+                case SVGToken::LinearGradient:
+                case SVGToken::RadialGradient:
+
+                /// gradient stops
+                case SVGToken::Stop:
+
+                /// text
+                case SVGToken::Text:
+                case SVGToken::Tspan:
+                case SVGToken::TextPath:
+                case SVGToken::Tref:
+
+                /// styles (as stylesheets)
+                case SVGToken::Style:
+
+                /// structural elements clip-path and mask
+                case SVGToken::ClipPathNode:
+                case SVGToken::Mask:
+
+                /// structural element marker
+                case SVGToken::Marker:
+
+                /// structural element pattern
+                case SVGToken::Pattern:
+
+                /// content handling after parsing
+                {
+                    if(mpTarget)
+                    {
+                        if(!mpTarget->getParent())
+                        {
+                            // last element closing, save this tree
+                            maDocument.appendNode(std::unique_ptr<SvgNode>(mpTarget));
+                        }
+
+                        mpTarget = const_cast< SvgNode* >(mpTarget->getParent());
+                    }
+                    else
+                    {
+                        OSL_ENSURE(false, "Closing token, but no context (!)");
+                    }
+                    break;
+                }
+                default:
+                {
+                    /// invalid token, ignore
+                }
+            }
+
+            if(pSvgTitleDescNode && mpTarget)
+            {
+                const OUString& aText(pSvgTitleDescNode->getText());
+
+                if(!aText.isEmpty())
+                {
+                    if(SVGToken::Title == aSVGToken)
+                    {
+                        mpTarget->parseAttribute(getStrTitle(), aSVGToken, aText);
+                    }
+                    else // if(SVGTokenDesc == aSVGToken)
+                    {
+                        mpTarget->parseAttribute(getStrDesc(), aSVGToken, aText);
+                    }
+                }
+            }
+
+            if(pCssStyle && pCssStyle->isTextCss())
+            {
+                // css style parsing
+                if(!maCssContents.empty())
+                {
+                    // need to interpret css styles and remember them as StyleSheets
+                    // #125325# Caution! the Css content may contain block comments
+                    // (see http://www.w3.org/wiki/CSS_basics#CSS_comments). These need
+                    // to be removed first
+                    const OUString aCommentFreeSource(removeBlockComments(*(maCssContents.end() - 1)));
+
+                    if(aCommentFreeSource.getLength())
+                    {
+                        pCssStyle->addCssStyleSheet(aCommentFreeSource);
+                    }
+
+                    maCssContents.pop_back();
+                }
+                else
+                {
+                    OSL_ENSURE(false, "Closing CssStyle, but no collector string on stack (!)");
+                }
+            }
+
+            if(pWhitespaceCheck)
+            {
+                // cleanup read strings
+                whiteSpaceHandling(pWhitespaceCheck);
+            }
+        }
+
+        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: */