8a499b4364
Change-Id: I423fa6a4f4fea5a27ec69f65dac952eff42d3d99 Reviewed-on: https://gerrit.libreoffice.org/c/core/+/123418 Tested-by: Jenkins Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>
117 lines
3.9 KiB
C++
117 lines
3.9 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* This file incorporates work covered by the following license notice:
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.apache.org/licenses/LICENSE-2.0 .
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*/
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#include <helper/ocomponentenumeration.hxx>
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#include <vcl/svapp.hxx>
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#include <sal/log.hxx>
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namespace framework{
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using namespace ::com::sun::star::container;
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using namespace ::com::sun::star::lang;
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using namespace ::com::sun::star::uno;
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using namespace ::cppu;
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using namespace ::osl;
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// constructor
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OComponentEnumeration::OComponentEnumeration( std::vector< css::uno::Reference< XComponent > >&& seqComponents )
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: m_nPosition ( 0 ) // 0 is the first position for a valid list and the right value for an invalid list to!
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, m_seqComponents ( std::move(seqComponents) )
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{}
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// destructor
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OComponentEnumeration::~OComponentEnumeration()
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{
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// Reset instance, free memory...
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impl_resetObject();
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}
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// XEventListener
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void SAL_CALL OComponentEnumeration::disposing( const EventObject& aEvent )
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{
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SolarMutexGuard g;
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// Safe impossible cases
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// This method is not specified for all incoming parameters.
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SAL_WARN_IF( !aEvent.Source.is(), "fwk", "OComponentEnumeration::disposing(): Invalid parameter detected!" );
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// Reset instance to defaults, release references and free memory.
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impl_resetObject();
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}
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// XEnumeration
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sal_Bool SAL_CALL OComponentEnumeration::hasMoreElements()
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{
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SolarMutexGuard g;
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// First position in a valid list is 0.
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// => The last one is getLength() - 1!
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// m_nPosition's current value is the position for the next element, which will be return, if user call "nextElement()"
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// => We have more elements if current position less than the length of the list!
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return ( m_nPosition < static_cast<sal_uInt32>(m_seqComponents.size()) );
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}
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// XEnumeration
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Any SAL_CALL OComponentEnumeration::nextElement()
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{
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SolarMutexGuard g;
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// If we have no elements or end of enumeration is arrived ...
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if ( !hasMoreElements() )
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{
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// .. throw an exception!
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throw NoSuchElementException();
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}
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// Else; Get next element from list ...
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Any aComponent;
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aComponent <<= m_seqComponents[m_nPosition];
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// ... and step to next element!
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++m_nPosition;
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// Return listitem.
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return aComponent;
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}
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// protected method
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void OComponentEnumeration::impl_resetObject()
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{
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// Attention:
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// Write this for multiple calls - NOT AT THE SAME TIME - but for more than one call again)!
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// It exist two ways to call this method. From destructor and from disposing().
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// I can't say, which one is the first. Normally the disposing-call - but other way...
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// Delete list of components.
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m_seqComponents.clear();
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// Reset position in list.
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// The list has no elements anymore. m_nPosition is normally the current position in list for nextElement!
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// But a position of 0 in a list of 0 items is an invalid state. This constellation can't work in future.
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// End of enumeration is arrived!
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// (see hasMoreElements() for more details...)
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m_nPosition = 0;
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}
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} // namespace framework
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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