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-rw-r--r--comphelper/source/container/enumhelper.cxx280
1 files changed, 280 insertions, 0 deletions
diff --git a/comphelper/source/container/enumhelper.cxx b/comphelper/source/container/enumhelper.cxx
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+/* -*- 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/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed
+ * with this work for additional information regarding copyright
+ * ownership. The ASF licenses this file to you under the Apache
+ * License, Version 2.0 (the "License"); you may not use this file
+ * except in compliance with the License. You may obtain a copy of
+ * the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <comphelper/enumhelper.hxx>
+#include <com/sun/star/lang/XComponent.hpp>
+#include <com/sun/star/container/XIndexAccess.hpp>
+#include <com/sun/star/container/XNameAccess.hpp>
+#include <utility>
+
+namespace comphelper
+{
+
+OEnumerationByName::OEnumerationByName(css::uno::Reference<css::container::XNameAccess> _xAccess)
+ :m_aNames(_xAccess->getElementNames())
+ ,m_xAccess(_xAccess)
+ ,m_nPos(0)
+ ,m_bListening(false)
+{
+ impl_startDisposeListening();
+}
+
+
+OEnumerationByName::OEnumerationByName(const css::uno::Reference<css::container::XNameAccess> _xAccess,
+ std::vector<OUString> _aNames )
+ :m_aNames(std::move(_aNames))
+ ,m_xAccess(std::move(_xAccess))
+ ,m_nPos(0)
+ ,m_bListening(false)
+{
+ impl_startDisposeListening();
+}
+
+OEnumerationByName::~OEnumerationByName()
+{
+ std::lock_guard aLock(m_aLock);
+
+ impl_stopDisposeListening();
+}
+
+
+sal_Bool SAL_CALL OEnumerationByName::hasMoreElements( )
+{
+ std::lock_guard aLock(m_aLock);
+
+ if (m_xAccess.is() && getLength() > m_nPos)
+ return true;
+
+ if (m_xAccess.is())
+ {
+ impl_stopDisposeListening();
+ m_xAccess.clear();
+ }
+
+ return false;
+}
+
+
+css::uno::Any SAL_CALL OEnumerationByName::nextElement( )
+{
+ std::lock_guard aLock(m_aLock);
+
+ css::uno::Any aRes;
+ if (m_xAccess.is() && m_nPos < getLength())
+ aRes = m_xAccess->getByName(getElement(m_nPos++));
+
+ if (m_xAccess.is() && m_nPos >= getLength())
+ {
+ impl_stopDisposeListening();
+ m_xAccess.clear();
+ }
+
+ if (!aRes.hasValue()) //There are no more elements
+ throw css::container::NoSuchElementException();
+
+ return aRes;
+}
+
+void SAL_CALL OEnumerationByName::disposing(const css::lang::EventObject& aEvent)
+{
+ std::lock_guard aLock(m_aLock);
+
+ if (aEvent.Source == m_xAccess)
+ m_xAccess.clear();
+}
+
+
+void OEnumerationByName::impl_startDisposeListening()
+{
+ if (m_bListening)
+ return;
+
+ osl_atomic_increment(&m_refCount);
+ css::uno::Reference< css::lang::XComponent > xDisposable(m_xAccess, css::uno::UNO_QUERY);
+ if (xDisposable.is())
+ {
+ xDisposable->addEventListener(this);
+ m_bListening = true;
+ }
+ osl_atomic_decrement(&m_refCount);
+}
+
+
+void OEnumerationByName::impl_stopDisposeListening()
+{
+ if (!m_bListening)
+ return;
+
+ osl_atomic_increment(&m_refCount);
+ css::uno::Reference< css::lang::XComponent > xDisposable(m_xAccess, css::uno::UNO_QUERY);
+ if (xDisposable.is())
+ {
+ xDisposable->removeEventListener(this);
+ m_bListening = false;
+ }
+ osl_atomic_decrement(&m_refCount);
+}
+
+sal_Int32 OEnumerationByName::getLength() const
+{
+ if (m_aNames.index() == 0)
+ return std::get<css::uno::Sequence<OUString>>(m_aNames).getLength();
+ else
+ return std::get<std::vector<OUString>>(m_aNames).size();
+}
+
+const OUString& OEnumerationByName::getElement(sal_Int32 nIndex) const
+{
+ if (m_aNames.index() == 0)
+ return std::get<css::uno::Sequence<OUString>>(m_aNames).getConstArray()[nIndex];
+ else
+ return std::get<std::vector<OUString>>(m_aNames)[nIndex];
+}
+
+
+OEnumerationByIndex::OEnumerationByIndex(css::uno::Reference< css::container::XIndexAccess > _xAccess)
+ :m_xAccess(std::move(_xAccess))
+ ,m_nPos(0)
+ ,m_bListening(false)
+{
+ impl_startDisposeListening();
+}
+
+
+OEnumerationByIndex::~OEnumerationByIndex()
+{
+ std::lock_guard aLock(m_aLock);
+
+ impl_stopDisposeListening();
+}
+
+
+sal_Bool SAL_CALL OEnumerationByIndex::hasMoreElements( )
+{
+ std::lock_guard aLock(m_aLock);
+
+ if (m_xAccess.is() && m_xAccess->getCount() > m_nPos)
+ return true;
+
+ if (m_xAccess.is())
+ {
+ impl_stopDisposeListening();
+ m_xAccess.clear();
+ }
+
+ return false;
+}
+
+
+css::uno::Any SAL_CALL OEnumerationByIndex::nextElement( )
+{
+ std::lock_guard aLock(m_aLock);
+
+ css::uno::Any aRes;
+ if (m_xAccess.is() && m_nPos < m_xAccess->getCount())
+ aRes = m_xAccess->getByIndex(m_nPos++);
+
+ if (m_xAccess.is() && m_nPos >= m_xAccess->getCount())
+ {
+ impl_stopDisposeListening();
+ m_xAccess.clear();
+ }
+
+ if (!aRes.hasValue())
+ throw css::container::NoSuchElementException();
+ return aRes;
+}
+
+
+void SAL_CALL OEnumerationByIndex::disposing(const css::lang::EventObject& aEvent)
+{
+ std::lock_guard aLock(m_aLock);
+
+ if (aEvent.Source == m_xAccess)
+ m_xAccess.clear();
+}
+
+
+void OEnumerationByIndex::impl_startDisposeListening()
+{
+ if (m_bListening)
+ return;
+
+ osl_atomic_increment(&m_refCount);
+ css::uno::Reference< css::lang::XComponent > xDisposable(m_xAccess, css::uno::UNO_QUERY);
+ if (xDisposable.is())
+ {
+ xDisposable->addEventListener(this);
+ m_bListening = true;
+ }
+ osl_atomic_decrement(&m_refCount);
+}
+
+
+void OEnumerationByIndex::impl_stopDisposeListening()
+{
+ if (!m_bListening)
+ return;
+
+ osl_atomic_increment(&m_refCount);
+ css::uno::Reference< css::lang::XComponent > xDisposable(m_xAccess, css::uno::UNO_QUERY);
+ if (xDisposable.is())
+ {
+ xDisposable->removeEventListener(this);
+ m_bListening = false;
+ }
+ osl_atomic_decrement(&m_refCount);
+}
+
+OAnyEnumeration::OAnyEnumeration(const css::uno::Sequence< css::uno::Any >& lItems)
+ :m_nPos(0)
+ ,m_lItems(lItems)
+{
+}
+
+
+OAnyEnumeration::~OAnyEnumeration()
+{
+}
+
+
+sal_Bool SAL_CALL OAnyEnumeration::hasMoreElements( )
+{
+ std::lock_guard aLock(m_aLock);
+
+ return (m_lItems.getLength() > m_nPos);
+}
+
+
+css::uno::Any SAL_CALL OAnyEnumeration::nextElement( )
+{
+ if ( ! hasMoreElements())
+ throw css::container::NoSuchElementException();
+
+ std::lock_guard aLock(m_aLock);
+ sal_Int32 nPos = m_nPos;
+ ++m_nPos;
+ return m_lItems[nPos];
+}
+
+
+} // namespace comphelper
+
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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