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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 <algorithm>
#include <comphelper/numberedcollection.hxx>
#include <com/sun/star/frame/UntitledNumbersConst.hpp>
#include <com/sun/star/lang/IllegalArgumentException.hpp>
namespace comphelper{
constexpr OUStringLiteral ERRMSG_INVALID_COMPONENT_PARAM = u"NULL as component reference not allowed.";
NumberedCollection::NumberedCollection()
{
}
NumberedCollection::~NumberedCollection()
{
}
void NumberedCollection::setOwner(const css::uno::Reference< css::uno::XInterface >& xOwner)
{
// SYNCHRONIZED ->
std::scoped_lock aLock(m_aMutex);
m_xOwner = xOwner;
// <- SYNCHRONIZED
}
void NumberedCollection::setUntitledPrefix(const OUString& sPrefix)
{
// SYNCHRONIZED ->
std::scoped_lock aLock(m_aMutex);
m_sUntitledPrefix = sPrefix;
// <- SYNCHRONIZED
}
::sal_Int32 SAL_CALL NumberedCollection::leaseNumber(const css::uno::Reference< css::uno::XInterface >& xComponent)
{
// SYNCHRONIZED ->
std::scoped_lock aLock(m_aMutex);
if ( ! xComponent.is ())
throw css::lang::IllegalArgumentException(ERRMSG_INVALID_COMPONENT_PARAM, m_xOwner.get(), 1);
sal_IntPtr pComponent = reinterpret_cast<sal_IntPtr>( xComponent.get() );
TNumberedItemHash::const_iterator pIt = m_lComponents.find (pComponent);
// a) component already exists - return its number directly
if (pIt != m_lComponents.end())
return pIt->second.nNumber;
// b) component must be added new to this container
// b1) collection is full - no further components possible
// -> return INVALID_NUMBER
::sal_Int32 nFreeNumber = impl_searchFreeNumber();
if (nFreeNumber == css::frame::UntitledNumbersConst::INVALID_NUMBER)
return css::frame::UntitledNumbersConst::INVALID_NUMBER;
// b2) add component to collection and return its number
TNumberedItem aItem;
aItem.xItem = css::uno::WeakReference< css::uno::XInterface >(xComponent);
aItem.nNumber = nFreeNumber;
m_lComponents[pComponent] = aItem;
return nFreeNumber;
// <- SYNCHRONIZED
}
void SAL_CALL NumberedCollection::releaseNumber(::sal_Int32 nNumber)
{
// SYNCHRONIZED ->
std::scoped_lock aLock(m_aMutex);
if (nNumber == css::frame::UntitledNumbersConst::INVALID_NUMBER)
throw css::lang::IllegalArgumentException ("Special value INVALID_NUMBER not allowed as input parameter.", m_xOwner.get(), 1);
TDeadItemList lDeadItems;
TNumberedItemHash::iterator pComponent;
for ( pComponent = m_lComponents.begin ();
pComponent != m_lComponents.end ();
++pComponent )
{
const TNumberedItem& rItem = pComponent->second;
const css::uno::Reference< css::uno::XInterface > xItem = rItem.xItem.get();
if ( ! xItem.is ())
{
lDeadItems.push_back(pComponent->first);
continue;
}
if (rItem.nNumber == nNumber)
{
m_lComponents.erase (pComponent);
break;
}
}
impl_cleanUpDeadItems(m_lComponents, lDeadItems);
// <- SYNCHRONIZED
}
void SAL_CALL NumberedCollection::releaseNumberForComponent(const css::uno::Reference< css::uno::XInterface >& xComponent)
{
// SYNCHRONIZED ->
std::scoped_lock aLock(m_aMutex);
if ( ! xComponent.is ())
throw css::lang::IllegalArgumentException(ERRMSG_INVALID_COMPONENT_PARAM, m_xOwner.get(), 1);
sal_IntPtr pComponent = reinterpret_cast<sal_IntPtr>( xComponent.get() );
TNumberedItemHash::iterator pIt = m_lComponents.find (pComponent);
// a) component exists and will be removed
if (pIt != m_lComponents.end())
m_lComponents.erase(pIt);
// else
// b) component does not exists - nothing todo here (ignore request!)
// <- SYNCHRONIZED
}
OUString SAL_CALL NumberedCollection::getUntitledPrefix()
{
// SYNCHRONIZED ->
std::scoped_lock aLock(m_aMutex);
return m_sUntitledPrefix;
// <- SYNCHRONIZED
}
/** create an ordered list of all possible numbers ...
e.g. {1,2,3,...,N} Max size of these list will be
current size of component list + 1 .
"+1" ... because in case all numbers in range 1..n
are in use we need a new number n+1 :-)
Every item which is already used as unique number
will be removed. At the end a list of e.g. {3,6,...,M}
exists where the first item represent the lowest free
number (in this example 3).
*/
::sal_Int32 NumberedCollection::impl_searchFreeNumber ()
{
// create bitset, where each position represents one possible number.
std::vector<bool> aUsedNumbers((m_lComponents.size() * 2) + 1, false);
for (const auto& rPair : m_lComponents)
{
// numbers start at 1
sal_Int32 pos = rPair.second.nNumber - 1;
if (pos >= static_cast<sal_Int32>(aUsedNumbers.size()))
aUsedNumbers.resize(pos * 2, false); // should be rare
aUsedNumbers[pos] = true;
}
// a) non free numbers ... return INVALID_NUMBER
auto it = std::find(aUsedNumbers.begin(), aUsedNumbers.end(), false);
if (it == aUsedNumbers.end())
return css::frame::UntitledNumbersConst::INVALID_NUMBER;
// b) return first free number
return it - aUsedNumbers.begin() + 1;
}
void NumberedCollection::impl_cleanUpDeadItems ( TNumberedItemHash& lItems ,
const TDeadItemList& lDeadItems)
{
for (const sal_IntPtr& rDeadItem : lDeadItems)
{
lItems.erase(rDeadItem);
}
}
} // namespace comphelper
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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