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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*************************************************************************
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* Copyright 2000, 2010 Oracle and/or its affiliates.
*
* OpenOffice.org - a multi-platform office productivity suite
*
* This file is part of OpenOffice.org.
*
* OpenOffice.org is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version 3
* only, as published by the Free Software Foundation.
*
* OpenOffice.org is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License version 3 for more details
* (a copy is included in the LICENSE file that accompanied this code).
*
* You should have received a copy of the GNU Lesser General Public License
* version 3 along with OpenOffice.org. If not, see
* <http://www.openoffice.org/license.html>
* for a copy of the LGPLv3 License.
*
************************************************************************/
#include <com/sun/star/uno/XInterface.hpp>
#include <com/sun/star/container/XIndexAccess.hpp>
#include <com/sun/star/container/XChild.hpp>
#include <comphelper/container.hxx>
#include <osl/diagnose.h>
//.........................................................................
namespace comphelper
{
//.........................................................................
//==============================================================================
IndexAccessIterator::IndexAccessIterator(::com::sun::star::uno::Reference< ::com::sun::star::uno::XInterface> xStartingPoint)
:m_xStartingPoint(xStartingPoint)
,m_xCurrentObject(NULL)
{
OSL_ENSURE(m_xStartingPoint.is(), "IndexAccessIterator::IndexAccessIterator : no starting point !");
}
IndexAccessIterator::~IndexAccessIterator() {}
//------------------------------------------------------------------------------
::com::sun::star::uno::Reference< ::com::sun::star::uno::XInterface> IndexAccessIterator::Next()
{
sal_Bool bCheckingStartingPoint = !m_xCurrentObject.is();
// ist die aktuelle Node der Anfangspunkt ?
sal_Bool bAlreadyCheckedCurrent = m_xCurrentObject.is();
// habe ich die aktuelle Node schon mal mittels ShouldHandleElement testen ?
if (!m_xCurrentObject.is())
m_xCurrentObject = m_xStartingPoint;
::com::sun::star::uno::Reference< ::com::sun::star::uno::XInterface> xSearchLoop( m_xCurrentObject);
sal_Bool bHasMoreToSearch = sal_True;
sal_Bool bFoundSomething = sal_False;
while (!bFoundSomething && bHasMoreToSearch)
{
// pre-order-traversierung
if (!bAlreadyCheckedCurrent && ShouldHandleElement(xSearchLoop))
{
m_xCurrentObject = xSearchLoop;
bFoundSomething = sal_True;
}
else
{
// zuerst absteigen, wenn moeglich
::com::sun::star::uno::Reference< ::com::sun::star::container::XIndexAccess> xContainerAccess(xSearchLoop, ::com::sun::star::uno::UNO_QUERY);
if (xContainerAccess.is() && xContainerAccess->getCount() && ShouldStepInto(xContainerAccess))
{ // zum ersten Child
::com::sun::star::uno::Any aElement(xContainerAccess->getByIndex(0));
xSearchLoop = *(::com::sun::star::uno::Reference< ::com::sun::star::uno::XInterface>*)aElement.getValue();
bCheckingStartingPoint = sal_False;
m_arrChildIndizies.push_back((sal_Int32)0);
}
else
{
// dann nach oben und nach rechts, wenn moeglich
while (m_arrChildIndizies.size() > 0)
{ // (mein Stack ist nich leer, also kann ich noch nach oben gehen)
::com::sun::star::uno::Reference< ::com::sun::star::container::XChild> xChild(xSearchLoop, ::com::sun::star::uno::UNO_QUERY);
OSL_ENSURE(xChild.is(), "IndexAccessIterator::Next : a content has no approriate interface !");
::com::sun::star::uno::Reference< ::com::sun::star::uno::XInterface> xParent( xChild->getParent());
xContainerAccess = ::com::sun::star::uno::Reference< ::com::sun::star::container::XIndexAccess>(xParent, ::com::sun::star::uno::UNO_QUERY);
OSL_ENSURE(xContainerAccess.is(), "IndexAccessIterator::Next : a content has an invalid parent !");
// den Index, den SearchLoop in diesem Parent hatte, von meinem 'Stack'
sal_Int32 nOldSearchChildIndex = m_arrChildIndizies[m_arrChildIndizies.size() - 1];
m_arrChildIndizies.pop_back();
if (nOldSearchChildIndex < xContainerAccess->getCount() - 1)
{ // auf dieser Ebene geht es noch nach rechts
++nOldSearchChildIndex;
// also das naechste Child
::com::sun::star::uno::Any aElement(xContainerAccess->getByIndex(nOldSearchChildIndex));
xSearchLoop = *(::com::sun::star::uno::Reference< ::com::sun::star::uno::XInterface>*) aElement.getValue();
bCheckingStartingPoint = sal_False;
// und dessen Position auf den 'Stack'
m_arrChildIndizies.push_back((sal_Int32)nOldSearchChildIndex);
break;
}
// hierher komme ich, wenn es auf der aktuellen Ebene nicht nach rechts geht, dann mache ich eine darueber weiter
xSearchLoop = xParent;
bCheckingStartingPoint = sal_False;
}
if ((m_arrChildIndizies.size() == 0) && !bCheckingStartingPoint)
{ // das ist genau dann der Fall, wenn ich keinen rechten Nachbarn fuer irgendeinen der direkten Vorfahren des
// urspruenglichen xSearchLoop gefunden habe
bHasMoreToSearch = sal_False;
}
}
if (bHasMoreToSearch)
{ // ich habe in xSearchLoop jetzt ein Interface eines 'Knotens' meines 'Baumes', den ich noch abtesten kann
if (ShouldHandleElement(xSearchLoop))
{
m_xCurrentObject = xSearchLoop;
bFoundSomething = sal_True;
}
else
if (bCheckingStartingPoint)
// ich bin noch am Anfang, konnte nicht absteigen, und habe an diesem Anfang nix gefunden -> nix mehr zu tun
bHasMoreToSearch = sal_False;
bAlreadyCheckedCurrent = sal_True;
}
}
}
if (!bFoundSomething)
{
OSL_ENSURE(m_arrChildIndizies.size() == 0, "IndexAccessIterator::Next : items left on stack ! how this ?");
Invalidate();
}
return m_xCurrentObject;
}
//.........................................................................
} // namespace comphelper
//.........................................................................
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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