starmath/source/unofilter.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.
   4  *
   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
  10 #include <unotools/mediadescriptor.hxx>
  11 #include <unotools/ucbstreamhelper.hxx>
  12 #include <sot/storage.hxx>
  13 #include <cppuhelper/supportsservice.hxx>
  14
  15 #include <document.hxx>
  16 #include "mathtype.hxx"
  17 #include <unomodel.hxx>
  18 #include <comphelper/diagnose_ex.hxx>
  19
  20 using namespace ::com::sun::star;
  21
  22 namespace
  23 {
  24 /// Invokes the MathType importer via UNO.
  25 class MathTypeFilter
  26     : public cppu::WeakImplHelper<document::XFilter, document::XImporter, lang::XServiceInfo>
  27 {
  28     uno::Reference<lang::XComponent> m_xDstDoc;
  29
  30 public:
  31     MathTypeFilter();
  32
  33     // XFilter
  34     sal_Bool SAL_CALL filter(const uno::Sequence<beans::PropertyValue>& rDescriptor) override;
  35     void SAL_CALL cancel() override;
  36
  37     // XImporter
  38     void SAL_CALL setTargetDocument(const uno::Reference<lang::XComponent>& xDoc) override;
  39
  40     // XServiceInfo
  41     OUString SAL_CALL getImplementationName() override;
  42     sal_Bool SAL_CALL supportsService(const OUString& rServiceName) override;
  43     uno::Sequence<OUString> SAL_CALL getSupportedServiceNames() override;
  44 };
  45 }
  46
  47 MathTypeFilter::MathTypeFilter() = default;
  48
  49 sal_Bool MathTypeFilter::filter(const uno::Sequence<beans::PropertyValue>& rDescriptor)
  50 {
  51     bool bSuccess = false;
  52     try
  53     {
  54         utl::MediaDescriptor aMediaDesc(rDescriptor);
  55         aMediaDesc.addInputStream();
  56         uno::Reference<io::XInputStream> xInputStream;
  57         aMediaDesc[utl::MediaDescriptor::PROP_INPUTSTREAM] >>= xInputStream;
  58         std::unique_ptr<SvStream> pStream(utl::UcbStreamHelper::CreateStream(xInputStream));
  59         if (pStream)
  60         {
  61             if (SotStorage::IsStorageFile(pStream.get()))
  62             {
  63                 rtl::Reference<SotStorage> aStorage(new SotStorage(pStream.get(), false));
  64                 // Is this a MathType Storage?
  65                 if (aStorage->IsStream(u"Equation Native"_ustr))
  66                 {
  67                     if (auto pModel = dynamic_cast<SmModel*>(m_xDstDoc.get()))
  68                     {
  69                         auto pDocShell = static_cast<SmDocShell*>(pModel->GetObjectShell());
  70                         OUStringBuffer aText(pDocShell->GetText());
  71                         MathType aEquation(aText);
  72                         bSuccess = aEquation.Parse(aStorage.get());
  73                         if (bSuccess)
  74                         {
  75                             pDocShell->SetText(aText.makeStringAndClear());
  76                             pDocShell->Parse();
  77                         }
  78                     }
  79                 }
  80             }
  81         }
  82     }
  83     catch (const uno::Exception&)
  84     {
  85         DBG_UNHANDLED_EXCEPTION("starmath");
  86     }
  87     return bSuccess;
  88 }
  89
  90 void MathTypeFilter::cancel() {}
  91
  92 void MathTypeFilter::setTargetDocument(const uno::Reference<lang::XComponent>& xDoc)
  93 {
  94     m_xDstDoc = xDoc;
  95 }
  96
  97 OUString MathTypeFilter::getImplementationName()
  98 {
  99     return u"com.sun.star.comp.Math.MathTypeFilter"_ustr;
 100 }
 101
 102 sal_Bool MathTypeFilter::supportsService(const OUString& rServiceName)
 103 {
 104     return cppu::supportsService(this, rServiceName);
 105 }
 106
 107 uno::Sequence<OUString> MathTypeFilter::getSupportedServiceNames()
 108 {
 109     return { u"com.sun.star.document.ImportFilter"_ustr };
 110 }
 111
 112 extern "C" SAL_DLLPUBLIC_EXPORT uno::XInterface*
 113 com_sun_star_comp_Math_MathTypeFilter_get_implementation(uno::XComponentContext* /*pCtx*/,
 114                                                          uno::Sequence<uno::Any> const& /*rSeq*/)
 115 {
 116     return cppu::acquire(new MathTypeFilter);
 117 }
 118
 119 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */