1 files changed, 114 insertions, 0 deletions
diff --git a/oox/source/mathml/imexport.cxx b/oox/source/mathml/imexport.cxx
new file mode 100644
index 0000000000..2b5990679b
--- /dev/null
+++ b/oox/source/mathml/imexport.cxx
@@ -0,0 +1,114 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+#include <oox/mathml/imexport.hxx>
+
+#include <oox/mathml/importutils.hxx>
+#include <oox/core/contexthandler.hxx>
+#include <oox/token/namespaces.hxx>
+
+#include <drawingml/textparagraph.hxx>
+
+
+using namespace ::com::sun::star;
+
+namespace oox
+{
+
+FormulaImExportBase::FormulaImExportBase()
+{
+}
+
+namespace formulaimport {
+
+namespace {
+
+class LazyMathBufferingContext : public core::ContextHandler
+{
+private:
+    XmlStreamBuilder & m_rBuilder;
+    std::vector<sal_Int32> m_OpenElements;
+
+public:
+    LazyMathBufferingContext(core::ContextHandler const& rParent,
+            drawingml::TextParagraph & rPara);
+
+    // com.sun.star.xml.sax.XFastContextHandler interface ---------------------
+
+    virtual void SAL_CALL startFastElement(::sal_Int32 Element, const uno::Reference<xml::sax::XFastAttributeList>& xAttribs) override;
+    virtual void SAL_CALL endFastElement(::sal_Int32 Element) override;
+    virtual uno::Reference< xml::sax::XFastContextHandler> SAL_CALL createFastChildContext(::sal_Int32 Element, const uno::Reference<xml::sax::XFastAttributeList >& xAttribs) override;
+    virtual void SAL_CALL characters(const OUString& rChars) override;
+
+};
+
+}
+
+LazyMathBufferingContext::LazyMathBufferingContext(
+        core::ContextHandler const& rParent, drawingml::TextParagraph & rPara)
+    : core::ContextHandler(rParent)
+    , m_rBuilder(rPara.GetMathXml())
+{
+}
+
+void SAL_CALL LazyMathBufferingContext::startFastElement(
+        sal_Int32 const nElement,
+        uno::Reference<xml::sax::XFastAttributeList> const& xAttrs)
+{
+    if (0 < m_OpenElements.size()) // ignore a14:m
+    {   // ignore outer oMathPara
+        if (1 != m_OpenElements.size() || OOX_TOKEN(officeMath, oMathPara) != nElement)
+        {
+            m_rBuilder.appendOpeningTag(nElement, xAttrs);
+        }
+    }
+    m_OpenElements.push_back(nElement);
+}
+
+void SAL_CALL LazyMathBufferingContext::endFastElement(sal_Int32 const nElement)
+{
+    m_OpenElements.pop_back();
+    if (0 < m_OpenElements.size()) // ignore a14:m
+    {   // ignore outer oMathPara
+        if (1 != m_OpenElements.size() || OOX_TOKEN(officeMath, oMathPara) != nElement)
+        {
+            m_rBuilder.appendClosingTag(nElement);
+        }
+    }
+}
+
+uno::Reference<xml::sax::XFastContextHandler> SAL_CALL
+LazyMathBufferingContext::createFastChildContext(sal_Int32 const,
+        uno::Reference<xml::sax::XFastAttributeList> const&)
+{
+    return this;
+}
+
+void SAL_CALL LazyMathBufferingContext::characters(OUString const& rChars)
+{
+    if (0 < m_OpenElements.size()) // ignore a14:m
+    {
+        if (m_OpenElements.back() == OOX_TOKEN(officeMath, t))
+        {
+            m_rBuilder.appendCharacters(rChars);
+        }
+    }
+}
+
+} // namespace oox::formulaimport
+
+rtl::Reference<core::ContextHandler> CreateLazyMathBufferingContext(
+        core::ContextHandler const& rParent, drawingml::TextParagraph & rPara)
+{
+    return new formulaimport::LazyMathBufferingContext(rParent, rPara);
+}
+
+} // namespace oox
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */