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 <cppuhelper/implbase2.hxx>
  26 #include <cppuhelper/supportsservice.hxx>
  27 #include <comphelper/sequence.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 <tools/diagnose_ex.h>
  33 #include <rtl/ref.hxx>
  34
  35 #include <svgvisitor.hxx>
  36
  37 using namespace ::com::sun::star;
  38
  39 namespace svgio::svgreader
  40 {
  41         namespace {
  42
  43         class XSvgParser : public ::cppu::WeakAggImplHelper2< graphic::XSvgParser, lang::XServiceInfo >
  44         {
  45         private:
  46             std::shared_ptr<SvgDrawVisitor> mpVisitor;
  47
  48             uno::Reference< uno::XComponentContext > context_;
  49             bool parseSvgXML(uno::Reference<io::XInputStream> const & xSVGStream,
  50                              uno::Reference<xml::sax::XDocumentHandler> const & xSvgDocHdl);
  51         public:
  52             explicit XSvgParser(
  53                 uno::Reference< uno::XComponentContext > const & context);
  54             XSvgParser(const XSvgParser&) = delete;
  55             XSvgParser& operator=(const XSvgParser&) = delete;
  56
  57             // XSvgParser
  58             virtual uno::Sequence< uno::Reference< ::graphic::XPrimitive2D > > SAL_CALL getDecomposition(
  59                 const uno::Reference< ::io::XInputStream >& xSVGStream,
  60                 const OUString& aAbsolutePath) override;
  61
  62             virtual uno::Any SAL_CALL getDrawCommands(
  63                 uno::Reference<io::XInputStream> const & xSvgStream,
  64                 const OUString& aAbsolutePath) override;
  65
  66             // XServiceInfo
  67             virtual OUString SAL_CALL getImplementationName() override;
  68             virtual sal_Bool SAL_CALL supportsService(const OUString&) override;
  69             virtual uno::Sequence< OUString > SAL_CALL getSupportedServiceNames() override;
  70         };
  71
  72         }
  73
  74         XSvgParser::XSvgParser(
  75             uno::Reference< uno::XComponentContext > const & context):
  76             context_(context)
  77         {
  78         }
  79
  80         bool XSvgParser::parseSvgXML(uno::Reference<io::XInputStream> const & xSVGStream, uno::Reference<xml::sax::XDocumentHandler> const & xSvgDocHdl)
  81         {
  82             try
  83             {
  84                 // prepare ParserInputSource
  85                 xml::sax::InputSource myInputSource;
  86                 myInputSource.aInputStream = xSVGStream;
  87
  88                 // get parser
  89                 uno::Reference< xml::sax::XParser > xParser(
  90                     xml::sax::Parser::create(context_));
  91                 // fdo#60471 need to enable internal entities because
  92                 // certain ... popular proprietary products write SVG files
  93                 // that use entities to define XML namespaces.
  94                 uno::Reference<lang::XInitialization> const xInit(xParser,
  95                         uno::UNO_QUERY_THROW);
  96                 uno::Sequence<uno::Any> args(1);
  97                 args[0] <<= OUString("DoSmeplease");
  98                 xInit->initialize(args);
  99
 100                 // connect parser and filter
 101                 xParser->setDocumentHandler(xSvgDocHdl);
 102
 103                 // finally, parse the stream to a hierarchy of
 104                 // SVGGraphicPrimitive2D which will be embedded to the
 105                 // primitive sequence. Their decompositions will in the
 106                 // end create local low-level primitives, thus SVG will
 107                 // be processable from all our processors
 108                 xParser->parseStream(myInputSource);
 109             }
 110             catch(const uno::Exception&)
 111             {
 112                 TOOLS_INFO_EXCEPTION( "svg", "Parse error");
 113                 return false;
 114             }
 115
 116             return true;
 117         }
 118
 119         uno::Sequence< uno::Reference< ::graphic::XPrimitive2D > > XSvgParser::getDecomposition(
 120             const uno::Reference< ::io::XInputStream >& xSVGStream,
 121             const OUString& aAbsolutePath )
 122         {
 123             drawinglayer::primitive2d::Primitive2DContainer aRetval;
 124
 125             if(xSVGStream.is())
 126             {
 127                 // local document handler
 128                 rtl::Reference<SvgDocHdl> pSvgDocHdl = new SvgDocHdl(aAbsolutePath);
 129                 parseSvgXML(xSVGStream, pSvgDocHdl);
 130
 131                 // decompose to primitives
 132                 for(std::unique_ptr<SvgNode> const & pCandidate : pSvgDocHdl->getSvgDocument().getSvgNodeVector())
 133                 {
 134                     if (Display::None != pCandidate->getDisplay())
 135                     {
 136                         pCandidate->decomposeSvgNode(aRetval, false);
 137                     }
 138                 }
 139             }
 140             else
 141             {
 142                 OSL_ENSURE(false, "Invalid stream (!)");
 143             }
 144
 145             return comphelper::containerToSequence(aRetval);
 146         }
 147
 148         uno::Any SAL_CALL XSvgParser::getDrawCommands(
 149                 uno::Reference<io::XInputStream> const & xSvgStream,
 150                 const OUString& aAbsolutePath)
 151         {
 152             uno::Any aAnyResult;
 153
 154             if (!xSvgStream.is())
 155                 return aAnyResult;
 156
 157             rtl::Reference<SvgDocHdl> pSvgDocHdl = new SvgDocHdl(aAbsolutePath);
 158             parseSvgXML(xSvgStream, pSvgDocHdl);
 159
 160             // decompose to primitives
 161             for (std::unique_ptr<SvgNode> const & pCandidate : pSvgDocHdl->getSvgDocument().getSvgNodeVector())
 162             {
 163                 if (Display::None != pCandidate->getDisplay())
 164                 {
 165                     mpVisitor = std::make_shared<SvgDrawVisitor>();
 166                     pCandidate->accept(*mpVisitor);
 167                     std::shared_ptr<gfx::DrawRoot> pDrawRoot(mpVisitor->getDrawRoot());
 168                     sal_uInt64 nPointer = reinterpret_cast<sal_uInt64>(pDrawRoot.get());
 169                     aAnyResult <<= sal_uInt64(nPointer);
 170                 }
 171             }
 172
 173             return aAnyResult;
 174         }
 175
 176         OUString SAL_CALL XSvgParser::getImplementationName()
 177         {
 178             return "svgio::svgreader::XSvgParser";
 179         }
 180
 181         sal_Bool SAL_CALL XSvgParser::supportsService(const OUString& rServiceName)
 182         {
 183             return cppu::supportsService(this, rServiceName);
 184         }
 185
 186         uno::Sequence< OUString > SAL_CALL XSvgParser::getSupportedServiceNames()
 187         {
 188             return { "com.sun.star.graphic.SvgTools" };
 189         }
 190
 191 } // end of namespace svgio::svgreader
 192
 193 extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface*
 194 svgio_XSvgParser_get_implementation(
 195     css::uno::XComponentContext* context, css::uno::Sequence<css::uno::Any> const&)
 196 {
 197     return cppu::acquire(new svgio::svgreader::XSvgParser(context));
 198 }
 199
 200 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */