oox/source/mathml/import.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 "oox/mathml/import.hxx"
  11
  12 #include <oox/mathml/importutils.hxx>
  13 #include <oox/core/contexthandler.hxx>
  14 #include <oox/token/namespaces.hxx>
  15 #include <oox/token/tokens.hxx>
  16
  17 #include <drawingml/textparagraph.hxx>
  18
  19
  20 using namespace ::com::sun::star;
  21
  22 namespace oox
  23 {
  24
  25 FormulaImportBase::FormulaImportBase()
  26 {
  27 }
  28
  29 namespace formulaimport {
  30
  31 class LazyMathBufferingContext : public core::ContextHandler
  32 {
  33 private:
  34     XmlStreamBuilder & m_rBuilder;
  35     long m_Counter;
  36
  37 public:
  38     LazyMathBufferingContext(core::ContextHandler const& rParent,
  39             drawingml::TextParagraph & rPara);
  40
  41     // com.sun.star.xml.sax.XFastContextHandler interface ---------------------
  42
  43     virtual void SAL_CALL startFastElement(::sal_Int32 Element, const uno::Reference<xml::sax::XFastAttributeList>& xAttribs) throw (xml::sax::SAXException, uno::RuntimeException, std::exception) override;
  44     virtual void SAL_CALL endFastElement(::sal_Int32 Element) throw (xml::sax::SAXException, uno::RuntimeException, std::exception) override;
  45     virtual uno::Reference< xml::sax::XFastContextHandler> SAL_CALL createFastChildContext(::sal_Int32 Element, const uno::Reference<xml::sax::XFastAttributeList >& xAttribs) throw (xml::sax::SAXException, uno::RuntimeException, std::exception) override;
  46     virtual void SAL_CALL characters(const OUString& rChars) throw (xml::sax::SAXException, uno::RuntimeException, std::exception) override;
  47
  48 };
  49
  50 LazyMathBufferingContext::LazyMathBufferingContext(
  51         core::ContextHandler const& rParent, drawingml::TextParagraph & rPara)
  52     : core::ContextHandler(rParent)
  53     , m_rBuilder(rPara.GetMathXml())
  54     , m_Counter(0)
  55 {
  56 }
  57
  58 void SAL_CALL LazyMathBufferingContext::startFastElement(
  59         sal_Int32 const nElement,
  60         uno::Reference<xml::sax::XFastAttributeList> const& xAttrs)
  61     throw (xml::sax::SAXException, uno::RuntimeException, std::exception)
  62 {
  63     if (0 < m_Counter) // ignore a14:m
  64     {   // ignore outer oMathPara
  65         if (1 != m_Counter || OOX_TOKEN(officeMath, oMathPara) != nElement)
  66         {
  67             m_rBuilder.appendOpeningTag(nElement, xAttrs);
  68         }
  69     }
  70     ++m_Counter;
  71 }
  72
  73 void SAL_CALL LazyMathBufferingContext::endFastElement(sal_Int32 const nElement)
  74     throw (xml::sax::SAXException, uno::RuntimeException, std::exception)
  75 {
  76     --m_Counter;
  77     if (0 < m_Counter) // ignore a14:m
  78     {   // ignore outer oMathPara
  79         if (1 != m_Counter || OOX_TOKEN(officeMath, oMathPara) != nElement)
  80         {
  81             m_rBuilder.appendClosingTag(nElement);
  82         }
  83     }
  84 }
  85
  86 uno::Reference<xml::sax::XFastContextHandler> SAL_CALL
  87 LazyMathBufferingContext::createFastChildContext(sal_Int32 const,
  88         uno::Reference<xml::sax::XFastAttributeList> const&)
  89     throw (xml::sax::SAXException, uno::RuntimeException, std::exception)
  90 {
  91     return this;
  92 }
  93
  94 void SAL_CALL LazyMathBufferingContext::characters(OUString const& rChars)
  95     throw (xml::sax::SAXException, uno::RuntimeException, std::exception)
  96 {
  97     if (0 < m_Counter) // ignore a14:m
  98     {
  99         m_rBuilder.appendCharacters(rChars);
 100     }
 101 }
 102
 103 } // namespace formulaimport
 104
 105 core::ContextHandlerRef CreateLazyMathBufferingContext(
 106         core::ContextHandler const& rParent, drawingml::TextParagraph & rPara)
 107 {
 108     return new formulaimport::LazyMathBufferingContext(rParent, rPara);
 109 }
 110
 111 } // namespace oox
 112
 113 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */