svgio/source/svguno/xsvgparser.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
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   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #include <sal/config.h>
  21
  22 #include <com/sun/star/graphic/XSvgParser.hpp>
  23 #include <com/sun/star/lang/XServiceInfo.hpp>
  24 #include <com/sun/star/lang/XInitialization.hpp>
  25 #include <comphelper/processfactory.hxx>
  26 #include <cppuhelper/implbase.hxx>
  27 #include <cppuhelper/supportsservice.hxx>
  28 #include <com/sun/star/xml/sax/XParser.hpp>
  29 #include <com/sun/star/xml/sax/Parser.hpp>
  30 #include <com/sun/star/xml/sax/InputSource.hpp>
  31 #include <svgdocumenthandler.hxx>
  32 #include <comphelper/diagnose_ex.hxx>
  33 #include <rtl/ref.hxx>
  34 #include <tools/stream.hxx>
  35 #include <unotools/streamwrap.hxx>
  36
  37 #include <svgvisitor.hxx>
  38 #include <utility>
  39
  40 using namespace ::com::sun::star;
  41
  42 namespace svgio::svgreader
  43 {
  44         namespace {
  45
  46         class XSvgParser : public ::cppu::WeakImplHelper< graphic::XSvgParser, lang::XServiceInfo >
  47         {
  48         private:
  49             std::shared_ptr<SvgDrawVisitor> mpVisitor;
  50
  51             uno::Reference< uno::XComponentContext > context_;
  52             bool parseSvgXML(uno::Reference<io::XInputStream> const & xSVGStream,
  53                              uno::Reference<xml::sax::XDocumentHandler> const & xSvgDocHdl);
  54         public:
  55             explicit XSvgParser(
  56                 uno::Reference< uno::XComponentContext > context);
  57             XSvgParser(const XSvgParser&) = delete;
  58             XSvgParser& operator=(const XSvgParser&) = delete;
  59
  60             // XSvgParser
  61             virtual uno::Sequence< uno::Reference< ::graphic::XPrimitive2D > > SAL_CALL getDecomposition(
  62                 const uno::Reference< ::io::XInputStream >& xSVGStream,
  63                 const OUString& aAbsolutePath) override;
  64
  65             virtual uno::Any SAL_CALL getDrawCommands(
  66                 uno::Reference<io::XInputStream> const & xSvgStream,
  67                 const OUString& aAbsolutePath) override;
  68
  69             // XServiceInfo
  70             virtual OUString SAL_CALL getImplementationName() override;
  71             virtual sal_Bool SAL_CALL supportsService(const OUString&) override;
  72             virtual uno::Sequence< OUString > SAL_CALL getSupportedServiceNames() override;
  73         };
  74
  75         }
  76
  77         XSvgParser::XSvgParser(
  78             uno::Reference< uno::XComponentContext > context):
  79             context_(std::move(context))
  80         {
  81         }
  82
  83         bool XSvgParser::parseSvgXML(uno::Reference<io::XInputStream> const & xSVGStream, uno::Reference<xml::sax::XDocumentHandler> const & xSvgDocHdl)
  84         {
  85             try
  86             {
  87                 // prepare ParserInputSource
  88                 xml::sax::InputSource myInputSource;
  89                 myInputSource.aInputStream = xSVGStream;
  90
  91                 // get parser
  92                 uno::Reference< xml::sax::XParser > xParser(
  93                     xml::sax::Parser::create(context_));
  94                 // fdo#60471 need to enable internal entities because
  95                 // certain ... popular proprietary products write SVG files
  96                 // that use entities to define XML namespaces.
  97                 uno::Reference<lang::XInitialization> const xInit(xParser,
  98                         uno::UNO_QUERY_THROW);
  99                 uno::Sequence<uno::Any> args{ uno::Any(OUString("DoSmeplease")) };
 100                 xInit->initialize(args);
 101
 102                 // connect parser and filter
 103                 xParser->setDocumentHandler(xSvgDocHdl);
 104
 105                 // finally, parse the stream to a hierarchy of
 106                 // SVGGraphicPrimitive2D which will be embedded to the
 107                 // primitive sequence. Their decompositions will in the
 108                 // end create local low-level primitives, thus SVG will
 109                 // be processable from all our processors
 110                 xParser->parseStream(myInputSource);
 111             }
 112             catch(const uno::Exception&)
 113             {
 114                 TOOLS_INFO_EXCEPTION( "svg", "Parse error");
 115                 return false;
 116             }
 117
 118             return true;
 119         }
 120
 121         uno::Sequence< uno::Reference< ::graphic::XPrimitive2D > > XSvgParser::getDecomposition(
 122             const uno::Reference< ::io::XInputStream >& xSVGStream,
 123             const OUString& aAbsolutePath )
 124         {
 125             drawinglayer::primitive2d::Primitive2DContainer aRetval;
 126
 127             if(xSVGStream.is())
 128             {
 129                 // local document handler
 130                 rtl::Reference<SvgDocHdl> pSvgDocHdl = new SvgDocHdl(aAbsolutePath);
 131                 parseSvgXML(xSVGStream, pSvgDocHdl);
 132
 133                 // decompose to primitives
 134                 for(std::unique_ptr<SvgNode> const & pCandidate : pSvgDocHdl->getSvgDocument().getSvgNodeVector())
 135                 {
 136                     if (Display::None != pCandidate->getDisplay())
 137                     {
 138                         pCandidate->decomposeSvgNode(aRetval, false);
 139                     }
 140                 }
 141             }
 142             else
 143             {
 144                 OSL_ENSURE(false, "Invalid stream (!)");
 145             }
 146
 147             return aRetval.toSequence();
 148         }
 149
 150         uno::Any SAL_CALL XSvgParser::getDrawCommands(
 151                 uno::Reference<io::XInputStream> const & xSvgStream,
 152                 const OUString& aAbsolutePath)
 153         {
 154             uno::Any aAnyResult;
 155
 156             if (!xSvgStream.is())
 157                 return aAnyResult;
 158
 159             rtl::Reference<SvgDocHdl> pSvgDocHdl = new SvgDocHdl(aAbsolutePath);
 160             parseSvgXML(xSvgStream, pSvgDocHdl);
 161
 162             // decompose to primitives
 163             for (std::unique_ptr<SvgNode> const & pCandidate : pSvgDocHdl->getSvgDocument().getSvgNodeVector())
 164             {
 165                 if (Display::None != pCandidate->getDisplay())
 166                 {
 167                     mpVisitor = std::make_shared<SvgDrawVisitor>();
 168                     pCandidate->accept(*mpVisitor);
 169                     std::shared_ptr<gfx::DrawRoot> pDrawRoot(mpVisitor->getDrawRoot());
 170                     sal_uInt64 nPointer = reinterpret_cast<sal_uInt64>(pDrawRoot.get());
 171                     aAnyResult <<= sal_uInt64(nPointer);
 172                 }
 173             }
 174
 175             return aAnyResult;
 176         }
 177
 178         OUString SAL_CALL XSvgParser::getImplementationName()
 179         {
 180             return "svgio::svgreader::XSvgParser";
 181         }
 182
 183         sal_Bool SAL_CALL XSvgParser::supportsService(const OUString& rServiceName)
 184         {
 185             return cppu::supportsService(this, rServiceName);
 186         }
 187
 188         uno::Sequence< OUString > SAL_CALL XSvgParser::getSupportedServiceNames()
 189         {
 190             return { "com.sun.star.graphic.SvgTools" };
 191         }
 192
 193 } // end of namespace svgio::svgreader
 194
 195 extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface*
 196 svgio_XSvgParser_get_implementation(
 197     css::uno::XComponentContext* context, css::uno::Sequence<css::uno::Any> const&)
 198 {
 199     return cppu::acquire(new svgio::svgreader::XSvgParser(context));
 200 }
 201
 202 extern "C" bool TestImportSVG(SvStream& rStream)
 203 {
 204     css::uno::Reference<css::io::XInputStream> xStream(new utl::OInputStreamWrapper(rStream));
 205     rtl::Reference<svgio::svgreader::XSvgParser> xSvgParser(new svgio::svgreader::XSvgParser(comphelper::getProcessComponentContext()));
 206     return xSvgParser->getDecomposition(xStream, OUString()).getLength() != 0;
 207 }
 208
 209 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */