svgio/source/svguno/xsvgparser.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
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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 <com/sun/star/xml/sax/XParser.hpp>
  28 #include <com/sun/star/xml/sax/Parser.hpp>
  29 #include <com/sun/star/xml/sax/InputSource.hpp>
  30 #include <svgdocumenthandler.hxx>
  31 #include <comphelper/diagnose_ex.hxx>
  32 #include <rtl/ref.hxx>
  33
  34 #include <svgvisitor.hxx>
  35 #include <utility>
  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 > 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 > context):
  76             context_(std::move(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{ uno::Any(OUString("DoSmeplease")) };
  97                 xInit->initialize(args);
  98
  99                 // connect parser and filter
 100                 xParser->setDocumentHandler(xSvgDocHdl);
 101
 102                 // finally, parse the stream to a hierarchy of
 103                 // SVGGraphicPrimitive2D which will be embedded to the
 104                 // primitive sequence. Their decompositions will in the
 105                 // end create local low-level primitives, thus SVG will
 106                 // be processable from all our processors
 107                 xParser->parseStream(myInputSource);
 108             }
 109             catch(const uno::Exception&)
 110             {
 111                 TOOLS_INFO_EXCEPTION( "svg", "Parse error");
 112                 return false;
 113             }
 114
 115             return true;
 116         }
 117
 118         uno::Sequence< uno::Reference< ::graphic::XPrimitive2D > > XSvgParser::getDecomposition(
 119             const uno::Reference< ::io::XInputStream >& xSVGStream,
 120             const OUString& aAbsolutePath )
 121         {
 122             drawinglayer::primitive2d::Primitive2DContainer aRetval;
 123
 124             if(xSVGStream.is())
 125             {
 126                 // local document handler
 127                 rtl::Reference<SvgDocHdl> pSvgDocHdl = new SvgDocHdl(aAbsolutePath);
 128                 parseSvgXML(xSVGStream, pSvgDocHdl);
 129
 130                 // decompose to primitives
 131                 for(std::unique_ptr<SvgNode> const & pCandidate : pSvgDocHdl->getSvgDocument().getSvgNodeVector())
 132                 {
 133                     if (Display::None != pCandidate->getDisplay())
 134                     {
 135                         pCandidate->decomposeSvgNode(aRetval, false);
 136                     }
 137                 }
 138             }
 139             else
 140             {
 141                 OSL_ENSURE(false, "Invalid stream (!)");
 142             }
 143
 144             return aRetval.toSequence();
 145         }
 146
 147         uno::Any SAL_CALL XSvgParser::getDrawCommands(
 148                 uno::Reference<io::XInputStream> const & xSvgStream,
 149                 const OUString& aAbsolutePath)
 150         {
 151             uno::Any aAnyResult;
 152
 153             if (!xSvgStream.is())
 154                 return aAnyResult;
 155
 156             rtl::Reference<SvgDocHdl> pSvgDocHdl = new SvgDocHdl(aAbsolutePath);
 157             parseSvgXML(xSvgStream, pSvgDocHdl);
 158
 159             // decompose to primitives
 160             for (std::unique_ptr<SvgNode> const & pCandidate : pSvgDocHdl->getSvgDocument().getSvgNodeVector())
 161             {
 162                 if (Display::None != pCandidate->getDisplay())
 163                 {
 164                     mpVisitor = std::make_shared<SvgDrawVisitor>();
 165                     pCandidate->accept(*mpVisitor);
 166                     std::shared_ptr<gfx::DrawRoot> pDrawRoot(mpVisitor->getDrawRoot());
 167                     sal_uInt64 nPointer = reinterpret_cast<sal_uInt64>(pDrawRoot.get());
 168                     aAnyResult <<= sal_uInt64(nPointer);
 169                 }
 170             }
 171
 172             return aAnyResult;
 173         }
 174
 175         OUString SAL_CALL XSvgParser::getImplementationName()
 176         {
 177             return "svgio::svgreader::XSvgParser";
 178         }
 179
 180         sal_Bool SAL_CALL XSvgParser::supportsService(const OUString& rServiceName)
 181         {
 182             return cppu::supportsService(this, rServiceName);
 183         }
 184
 185         uno::Sequence< OUString > SAL_CALL XSvgParser::getSupportedServiceNames()
 186         {
 187             return { "com.sun.star.graphic.SvgTools" };
 188         }
 189
 190 } // end of namespace svgio::svgreader
 191
 192 extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface*
 193 svgio_XSvgParser_get_implementation(
 194     css::uno::XComponentContext* context, css::uno::Sequence<css::uno::Any> const&)
 195 {
 196     return cppu::acquire(new svgio::svgreader::XSvgParser(context));
 197 }
 198
 199 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */