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| -rw-r--r-- | svl/source/items/itemset.cxx | 1583 |
1 files changed, 1583 insertions, 0 deletions
diff --git a/svl/source/items/itemset.cxx b/svl/source/items/itemset.cxx new file mode 100644 index 000000000..982cbc837 --- /dev/null +++ b/svl/source/items/itemset.cxx @@ -0,0 +1,1583 @@ +/* -*- 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 <string.h> + +#include <algorithm> +#include <cassert> +#include <cstddef> + +#include <libxml/xmlwriter.h> + +#include <sal/log.hxx> +#include <svl/itemset.hxx> +#include <svl/itempool.hxx> +#include <svl/itemiter.hxx> +#include <svl/setitem.hxx> +#include <svl/whiter.hxx> + +#include <items_helper.hxx> + +/** + * Ctor for a SfxItemSet with exactly the Which Ranges, which are known to + * the supplied SfxItemPool. + * + * For Sfx programmers: an SfxItemSet constructed in this way cannot + * contain any Items with SlotIds as Which values. + * + * Don't create ItemSets with full range before FreezeIdRanges()! + */ +SfxItemSet::SfxItemSet(SfxItemPool& rPool) + : SfxItemSet(rPool, rPool.GetFrozenIdRanges()) +{ +} + +SfxItemSet::SfxItemSet( SfxItemPool& rPool, SfxAllItemSetFlag ) + : m_pPool(&rPool) + , m_pParent(nullptr) + , m_ppItems(nullptr) + , m_nCount(0) + , m_bItemsFixed(false) +{ +} + +/** special constructor for SfxItemSetFixed */ +SfxItemSet::SfxItemSet( SfxItemPool& rPool, WhichRangesContainer&& ranges, SfxPoolItem const ** ppItems ) + : m_pPool(&rPool) + , m_pParent(nullptr) + , m_ppItems(ppItems) + , m_pWhichRanges(std::move(ranges)) + , m_nCount(0) + , m_bItemsFixed(true) +{ + assert(ppItems); + assert(m_pWhichRanges.size() > 0); + assert(svl::detail::validRanges2(m_pWhichRanges)); +} + +SfxItemSet::SfxItemSet( + SfxItemPool & pool, + const WhichRangesContainer& wids, + std::size_t items): + m_pPool(&pool), m_pParent(nullptr), + m_ppItems(new SfxPoolItem const *[items]{}), + m_pWhichRanges(wids), + m_nCount(0), + m_bItemsFixed(false) +{ + assert(wids.size() != 0); + assert(svl::detail::validRanges2(m_pWhichRanges)); +} + +SfxItemSet::SfxItemSet(SfxItemPool& pool, const WhichRangesContainer& wids) + : SfxItemSet(pool, wids, svl::detail::CountRanges(wids)) +{ +} + +SfxItemSet::SfxItemSet(SfxItemPool& pool, WhichRangesContainer&& wids) + : SfxItemSet(pool, wids, svl::detail::CountRanges(wids)) +{ +} + +SfxItemSet::SfxItemSet( const SfxItemSet& rASet ) + : m_pPool( rASet.m_pPool ) + , m_pParent( rASet.m_pParent ) + , m_pWhichRanges( rASet.m_pWhichRanges ) + , m_nCount( rASet.m_nCount ) + , m_bItemsFixed(false) +{ + if (rASet.m_pWhichRanges.empty()) + { + m_ppItems = nullptr; + return; + } + + auto nCnt = svl::detail::CountRanges(m_pWhichRanges); + m_ppItems = new const SfxPoolItem* [nCnt] {}; + + // Copy attributes + SfxPoolItem const** ppDst = m_ppItems; + SfxPoolItem const** ppSrc = rASet.m_ppItems; + for( sal_uInt16 n = nCnt; n; --n, ++ppDst, ++ppSrc ) + if ( nullptr == *ppSrc || // Current Default? + IsInvalidItem(*ppSrc) || // DontCare? + IsStaticDefaultItem(*ppSrc) ) // Defaults that are not to be pooled? + // Just copy the pointer + *ppDst = *ppSrc; + else if (m_pPool->IsItemPoolable( **ppSrc )) + { + // Just copy the pointer and increase RefCount + *ppDst = *ppSrc; + (*ppDst)->AddRef(); + } + else if ( !(*ppSrc)->Which() ) + *ppDst = (*ppSrc)->Clone(); + else + // !IsPoolable() => assign via Pool + *ppDst = &m_pPool->Put( **ppSrc ); + + assert(svl::detail::validRanges2(m_pWhichRanges)); +} + +SfxItemSet::SfxItemSet(SfxItemSet&& rASet) noexcept + : m_pPool( rASet.m_pPool ) + , m_pParent( rASet.m_pParent ) + , m_ppItems( rASet.m_ppItems ) + , m_pWhichRanges( std::move(rASet.m_pWhichRanges) ) + , m_nCount( rASet.m_nCount ) + , m_bItemsFixed(false) +{ + if (rASet.m_bItemsFixed) + { + // have to make a copy + int noItems = svl::detail::CountRanges(m_pWhichRanges); + m_ppItems = new const SfxPoolItem* [noItems]; + std::copy(rASet.m_ppItems, rASet.m_ppItems + noItems, m_ppItems); + } + else + // taking over ownership + rASet.m_ppItems = nullptr; + rASet.m_pPool = nullptr; + rASet.m_pParent = nullptr; + rASet.m_nCount = 0; + assert(svl::detail::validRanges2(m_pWhichRanges)); +} + +SfxItemSet::~SfxItemSet() +{ + if (!m_pWhichRanges.empty()) // might be nullptr if we have been moved-from + { + sal_uInt16 nCount = TotalCount(); + if( Count() ) + { + SfxPoolItem const** ppFnd = m_ppItems; + for( sal_uInt16 nCnt = nCount; nCnt; --nCnt, ++ppFnd ) + if( *ppFnd && !IsInvalidItem(*ppFnd) ) + { + if( !(*ppFnd)->Which() ) + delete *ppFnd; + else { + // Still multiple references present, so just alter the RefCount + if ( 1 < (*ppFnd)->GetRefCount() && !IsDefaultItem(*ppFnd) ) + (*ppFnd)->ReleaseRef(); + else + if ( !IsDefaultItem(*ppFnd) ) + // Delete from Pool + m_pPool->Remove( **ppFnd ); + } + } + } + } + + if (!m_bItemsFixed) + delete[] m_ppItems; + m_pWhichRanges.reset(); // for invariant-testing +} + +/** + * Delete single Items or all Items (nWhich == 0) + */ +sal_uInt16 SfxItemSet::ClearItem( sal_uInt16 nWhich ) +{ + if( !Count() ) + return 0; + if( nWhich ) + return ClearSingleItemImpl(nWhich, std::nullopt); + else + return ClearAllItemsImpl(); +} + +sal_uInt16 SfxItemSet::ClearSingleItemImpl( sal_uInt16 nWhich, std::optional<sal_uInt16> oItemOffsetHint ) +{ + sal_uInt16 nDel = 0; + SfxPoolItem const** pFoundOne = nullptr; + + if (oItemOffsetHint) + { + pFoundOne = m_ppItems + *oItemOffsetHint; + assert(!*pFoundOne || IsInvalidItem(*pFoundOne) || (*pFoundOne)->IsVoidItem() || (*pFoundOne)->Which() == nWhich); + } + else + { + SfxPoolItem const** ppFnd = m_ppItems; + for (const WhichPair& rPair : m_pWhichRanges) + { + // Within this range? + if( rPair.first <= nWhich && nWhich <= rPair.second ) + { + // Actually set? + ppFnd += nWhich - rPair.first; + pFoundOne = ppFnd; + + // found => break + break; + } + ppFnd += rPair.second - rPair.first + 1; + } + } + if (pFoundOne && *pFoundOne) + { + // Due to the assertions in the sub calls, we need to do the following + --m_nCount; + const SfxPoolItem *pItemToClear = *pFoundOne; + *pFoundOne = nullptr; + + if ( !IsInvalidItem(pItemToClear) ) + { + if (SfxItemPool::IsWhich(nWhich)) + { + const SfxPoolItem& rNew = m_pParent + ? m_pParent->Get( nWhich ) + : m_pPool->GetDefaultItem( nWhich ); + + Changed( *pItemToClear, rNew ); + } + if ( pItemToClear->Which() ) + m_pPool->Remove( *pItemToClear ); + } + ++nDel; + } + return nDel; +} + + +sal_uInt16 SfxItemSet::ClearAllItemsImpl() +{ + sal_uInt16 nDel = m_nCount; + SfxPoolItem const** ppFnd = m_ppItems; + + for (const WhichPair& rPair : m_pWhichRanges) + { + for( sal_uInt16 nWhich = rPair.first; nWhich <= rPair.second; ++nWhich, ++ppFnd ) + { + if( !*ppFnd ) + continue; + + // Due to the assertions in the sub calls, we need to do this + --m_nCount; + const SfxPoolItem *pItemToClear = *ppFnd; + *ppFnd = nullptr; + + if ( IsInvalidItem(pItemToClear) ) + continue; + + if (SfxItemPool::IsWhich(nWhich)) + { + const SfxPoolItem& rNew = m_pParent + ? m_pParent->Get( nWhich ) + : m_pPool->GetDefaultItem( nWhich ); + + Changed( *pItemToClear, rNew ); + } + + // #i32448# + // Take care of disabled items, too. + if (!pItemToClear->m_nWhich) + { + // item is disabled, delete it + delete pItemToClear; + } + else + { + // remove item from pool + m_pPool->Remove( *pItemToClear ); + } + } + } + return nDel; +} + +void SfxItemSet::ClearInvalidItems() +{ + SfxPoolItem const** ppFnd = m_ppItems; + for (const WhichPair& rPair : m_pWhichRanges) + { + for( sal_uInt16 nWhich = rPair.first; nWhich <= rPair.second; ++nWhich, ++ppFnd ) + if( IsInvalidItem(*ppFnd) ) + { + *ppFnd = nullptr; + --m_nCount; + } + } +} + +void SfxItemSet::InvalidateAllItems() +{ + assert( !m_nCount && "There are still Items set" ); + m_nCount = TotalCount(); + memset(static_cast<void*>(m_ppItems), -1, m_nCount * sizeof(SfxPoolItem*)); +} + +SfxItemState SfxItemSet::GetItemState( sal_uInt16 nWhich, + bool bSrchInParent, + const SfxPoolItem **ppItem ) const +{ + return GetItemStateImpl(nWhich, bSrchInParent, ppItem, std::nullopt); +} + +SfxItemState SfxItemSet::GetItemStateImpl( sal_uInt16 nWhich, + bool bSrchInParent, + const SfxPoolItem **ppItem, + std::optional<sal_uInt16> oItemsOffsetHint) const +{ + // Find the range in which the Which is located + const SfxItemSet* pCurrentSet = this; + SfxItemState eRet = SfxItemState::UNKNOWN; + do + { + SfxPoolItem const** pFoundOne = nullptr; + if (oItemsOffsetHint) + { + pFoundOne = pCurrentSet->m_ppItems + *oItemsOffsetHint; + assert(!*pFoundOne || IsInvalidItem(*pFoundOne) || (*pFoundOne)->IsVoidItem() || (*pFoundOne)->Which() == nWhich); + oItemsOffsetHint.reset(); // in case we need to search parent + } + else + { + SfxPoolItem const** ppFnd = pCurrentSet->m_ppItems; + for (const WhichPair& rPair : pCurrentSet->m_pWhichRanges) + { + if ( rPair.first <= nWhich && nWhich <= rPair.second ) + { + // Within this range + pFoundOne = ppFnd + nWhich - rPair.first; + break; + } + ppFnd += rPair.second - rPair.first + 1; + } + } + + if (pFoundOne) + { + if ( !*pFoundOne ) + { + eRet = SfxItemState::DEFAULT; + if( !bSrchInParent ) + return eRet; // Not present + // Keep searching in the parents! + } + else + { + if ( IsInvalidItem(*pFoundOne) ) + // Different ones are present + return SfxItemState::DONTCARE; + + if ( (*pFoundOne)->IsVoidItem() ) + return SfxItemState::DISABLED; + + if (ppItem) + { + *ppItem = *pFoundOne; + } + return SfxItemState::SET; + } + } + if (!bSrchInParent) + break; + pCurrentSet = pCurrentSet->m_pParent; + } while (nullptr != pCurrentSet); + return eRet; +} + +bool SfxItemSet::HasItem(sal_uInt16 nWhich, const SfxPoolItem** ppItem) const +{ + bool bRet = SfxItemState::SET == GetItemState(nWhich, true, ppItem); + if (!bRet && ppItem) + *ppItem = nullptr; + return bRet; +} + +const SfxPoolItem* SfxItemSet::PutImpl( const SfxPoolItem& rItem, sal_uInt16 nWhich, bool bPassingOwnership ) +{ + if ( !nWhich ) + { + assert(!bPassingOwnership); + return nullptr; //FIXME: Only because of Outliner bug + } + + SfxPoolItem const** ppFnd = m_ppItems; + for (const WhichPair& rPair : m_pWhichRanges) + { + if( rPair.first <= nWhich && nWhich <= rPair.second ) + { + // Within this range + ppFnd += nWhich - rPair.first; + if( *ppFnd ) // Already one present + { + // Same Item already present? + if ( *ppFnd == &rItem ) + { + assert(!bPassingOwnership); + return nullptr; + } + + // Will 'dontcare' or 'disabled' be overwritten with some real value? + if ( rItem.Which() && ( IsInvalidItem(*ppFnd) || !(*ppFnd)->Which() ) ) + { + auto const old = *ppFnd; + *ppFnd = &m_pPool->PutImpl( rItem, nWhich, bPassingOwnership ); + if (!IsInvalidItem(old)) { + assert(old->Which() == 0); + delete old; + } + return *ppFnd; + } + + // Turns into disabled? + if( !rItem.Which() ) + { + if (IsInvalidItem(*ppFnd) || (*ppFnd)->Which() != 0) { + *ppFnd = rItem.Clone(m_pPool); + } + if (bPassingOwnership) + delete &rItem; + return nullptr; + } + else + { + // Same value already present? + if ( rItem == **ppFnd ) + { + if (bPassingOwnership) + delete &rItem; + return nullptr; + } + + // Add the new one, remove the old one + const SfxPoolItem& rNew = m_pPool->PutImpl( rItem, nWhich, bPassingOwnership ); + const SfxPoolItem* pOld = *ppFnd; + *ppFnd = &rNew; + if (SfxItemPool::IsWhich(nWhich)) + Changed( *pOld, rNew ); + m_pPool->Remove( *pOld ); + } + } + else + { + ++m_nCount; + if( !rItem.Which() ) + { + *ppFnd = rItem.Clone(m_pPool); + if (bPassingOwnership) + delete &rItem; + } + else + { + const SfxPoolItem& rNew = m_pPool->PutImpl( rItem, nWhich, bPassingOwnership ); + *ppFnd = &rNew; + if (SfxItemPool::IsWhich(nWhich)) + { + const SfxPoolItem& rOld = m_pParent + ? m_pParent->Get( nWhich ) + : m_pPool->GetDefaultItem( nWhich ); + Changed( rOld, rNew ); + } + } + } + SAL_WARN_IF(!bPassingOwnership && m_pPool->IsItemPoolable(nWhich) && + dynamic_cast<const SfxSetItem*>( &rItem ) == nullptr && + **ppFnd != rItem, + "svl.items", "putted Item unequal, with ID/pos " << nWhich ); + return *ppFnd; + } + ppFnd += rPair.second - rPair.first + 1; + } + if (bPassingOwnership) + delete &rItem; + return nullptr; +} + +bool SfxItemSet::Put( const SfxItemSet& rSet, bool bInvalidAsDefault ) +{ + bool bRet = false; + if( rSet.Count() ) + { + SfxPoolItem const** ppFnd = rSet.m_ppItems; + for (const WhichPair& rPair : rSet.m_pWhichRanges) + { + for ( sal_uInt16 nWhich = rPair.first; nWhich <= rPair.second; ++nWhich, ++ppFnd ) + if( *ppFnd ) + { + if ( IsInvalidItem( *ppFnd ) ) + { + if ( bInvalidAsDefault ) + bRet |= 0 != ClearItem( nWhich ); + // FIXME: Caused a SEGFAULT on non Windows-platforms: + // bRet |= 0 != Put( rSet.GetPool()->GetDefaultItem(nWhich), nWhich ); + else + InvalidateItem( nWhich ); + } + else + bRet |= nullptr != Put( **ppFnd, nWhich ); + } + } + } + return bRet; +} + +/** + * This method takes the Items from the 'rSet' and adds to '*this'. + * Which ranges in '*this' that are non-existent in 'rSet' will not + * be altered. The Which range of '*this' is also not changed. + * + * Items set in 'rSet' are also set in '*this'. + * Default (0 pointer) and Invalid (-1 pointer) Items are processed + * according to their parameter 'eDontCareAs' and 'eDefaultAs': + * + * SfxItemState::SET: Hard set to the default of the Pool + * SfxItemState::DEFAULT: Deleted (0 pointer) + * SfxItemState::DONTCARE: Invalid (-1 pointer) + * + * NB: All other values for 'eDontCareAs' and 'eDefaultAs' are invalid + */ +void SfxItemSet::PutExtended +( + const SfxItemSet& rSet, // Source of the Items to be put + SfxItemState eDontCareAs, // What will happen to the DontCare Items + SfxItemState eDefaultAs // What will happen to the Default Items +) +{ + // don't "optimize" with "if( rSet.Count()" because of dont-care + defaults + SfxPoolItem const** ppFnd = rSet.m_ppItems; + for (const WhichPair& rPair : rSet.m_pWhichRanges) + { + for ( sal_uInt16 nWhich = rPair.first; nWhich <= rPair.second; ++nWhich, ++ppFnd ) + if( *ppFnd ) + { + if ( IsInvalidItem( *ppFnd ) ) + { + // Item is DontCare: + switch ( eDontCareAs ) + { + case SfxItemState::SET: + Put( rSet.GetPool()->GetDefaultItem(nWhich), nWhich ); + break; + + case SfxItemState::DEFAULT: + ClearItem( nWhich ); + break; + + case SfxItemState::DONTCARE: + InvalidateItem( nWhich ); + break; + + default: + assert(!"invalid Argument for eDontCareAs"); + } + } + else + // Item is set: + Put( **ppFnd, nWhich ); + } + else + { + // Item is default: + switch ( eDefaultAs ) + { + case SfxItemState::SET: + Put( rSet.GetPool()->GetDefaultItem(nWhich), nWhich ); + break; + + case SfxItemState::DEFAULT: + ClearItem( nWhich ); + break; + + case SfxItemState::DONTCARE: + InvalidateItem( nWhich ); + break; + + default: + assert(!"invalid Argument for eDefaultAs"); + } + } + } +} + +/** + * Expands the ranges of settable items by 'nFrom' to 'nTo'. Keeps state of + * items which are new ranges too. + */ +void SfxItemSet::MergeRange( sal_uInt16 nFrom, sal_uInt16 nTo ) +{ + // special case: exactly one sal_uInt16 which is already included? + if (nFrom == nTo) + if (SfxItemState eItemState = GetItemState(nFrom, false); + eItemState == SfxItemState::DEFAULT || eItemState == SfxItemState::SET) + return; + + auto pNewRanges = m_pWhichRanges.MergeRange(nFrom, nTo); + RecreateRanges_Impl(pNewRanges); + m_pWhichRanges = std::move(pNewRanges); +} + +/** + * Modifies the ranges of settable items. Keeps state of items which + * are new ranges too. + */ +void SfxItemSet::SetRanges( const WhichRangesContainer& pNewRanges ) +{ + // Identical Ranges? + if (m_pWhichRanges == pNewRanges) + return; + assert(svl::detail::validRanges2(pNewRanges)); + RecreateRanges_Impl(pNewRanges); + m_pWhichRanges = pNewRanges; +} + +void SfxItemSet::SetRanges( WhichRangesContainer&& pNewRanges ) +{ + // Identical Ranges? + if (m_pWhichRanges == pNewRanges) + return; + assert(svl::detail::validRanges2(pNewRanges)); + RecreateRanges_Impl(pNewRanges); + m_pWhichRanges = std::move(pNewRanges); +} + +void SfxItemSet::RecreateRanges_Impl(const WhichRangesContainer& pNewRanges) +{ + // create new item-array (by iterating through all new ranges) + const auto nSize = svl::detail::CountRanges(pNewRanges); + SfxPoolItem const** aNewItems = new const SfxPoolItem* [ nSize ]; + sal_uInt16 nNewCount = 0; + if (m_nCount == 0) + memset( aNewItems, 0, nSize * sizeof( SfxPoolItem* ) ); + else + { + sal_uInt16 n = 0; + for ( auto const & pRange : pNewRanges ) + { + // iterate through all ids in the range + for ( sal_uInt16 nWID = pRange.first; nWID <= pRange.second; ++nWID, ++n ) + { + // direct move of pointer (not via pool) + SfxItemState eState = GetItemState( nWID, false, aNewItems+n ); + if ( SfxItemState::SET == eState ) + { + // increment new item count and possibly increment ref count + ++nNewCount; + aNewItems[n]->AddRef(); + } + else if ( SfxItemState::DISABLED == eState ) + { + // put "disabled" item + ++nNewCount; + aNewItems[n] = new SfxVoidItem(0); + } + else if ( SfxItemState::DONTCARE == eState ) + { + ++nNewCount; + aNewItems[n] = INVALID_POOL_ITEM; + } + else + { + // default + aNewItems[n] = nullptr; + } + } + } + // free old items + sal_uInt16 nOldTotalCount = TotalCount(); + for ( sal_uInt16 nItem = 0; nItem < nOldTotalCount; ++nItem ) + { + const SfxPoolItem *pItem = m_ppItems[nItem]; + if ( pItem && !IsInvalidItem(pItem) && pItem->Which() ) + m_pPool->Remove(*pItem); + } + } + + // replace old items-array and ranges + if (m_bItemsFixed) + m_bItemsFixed = false; + else + delete[] m_ppItems; + m_ppItems = aNewItems; + m_nCount = nNewCount; +} + +/** + * The SfxItemSet takes over exactly those SfxPoolItems that are + * set in rSet and are in their own Which range. All others are removed. + * The SfxItemPool is retained, such that SfxPoolItems that have been + * taken over, are moved from the rSet's SfxItemPool to the SfxItemPool + * of *this. + * + * SfxPoolItems in rSet, for which holds 'IsInvalidItem() == true' are + * taken over as invalid items. + * + * @return bool true + * SfxPoolItems have been taken over + * + * false + * No SfxPoolItems have been taken over, because + * e.g. the Which ranges of SfxItemSets are not intersecting + * or the intersection does not contain SfxPoolItems that are + * set in rSet + */ +bool SfxItemSet::Set +( + const SfxItemSet& rSet, /* The SfxItemSet, whose SfxPoolItems are + to been taken over */ + + bool bDeep /* true (default) + + The SfxPoolItems from the parents that may + be present in rSet, are also taken over into + this SfxPoolItemSet + + false + The SfxPoolItems from the parents of + rSet are not taken into account */ +) +{ + bool bRet = false; + if (m_nCount) + ClearItem(); + if ( bDeep ) + { + SfxWhichIter aIter1(*this); + SfxWhichIter aIter2(rSet); + sal_uInt16 nWhich1 = aIter1.FirstWhich(); + sal_uInt16 nWhich2 = aIter2.FirstWhich(); + for (;;) + { + if (!nWhich1 || !nWhich2) + break; + if (nWhich1 > nWhich2) + { + nWhich2 = aIter2.NextWhich(); + continue; + } + if (nWhich1 < nWhich2) + { + nWhich1 = aIter1.NextWhich(); + continue; + } + const SfxPoolItem* pItem; + if( SfxItemState::SET == aIter2.GetItemState( true, &pItem ) ) + bRet |= nullptr != Put( *pItem, pItem->Which() ); + nWhich1 = aIter1.NextWhich(); + nWhich2 = aIter2.NextWhich(); + } + } + else + bRet = Put(rSet, false); + + return bRet; +} + +const SfxPoolItem* SfxItemSet::GetItem(sal_uInt16 nId, bool bSearchInParent) const +{ + // Convert to WhichId + sal_uInt16 nWhich = GetPool()->GetWhich(nId); + + // Is the Item set or 'bDeep == true' available? + const SfxPoolItem *pItem = nullptr; + SfxItemState eState = GetItemState(nWhich, bSearchInParent, &pItem); + if (bSearchInParent && SfxItemState::DEFAULT == eState && SfxItemPool::IsWhich(nWhich)) + { + pItem = &m_pPool->GetDefaultItem(nWhich); + } + + return pItem; +} + +const SfxPoolItem& SfxItemSet::Get( sal_uInt16 nWhich, bool bSrchInParent) const +{ + // Search the Range in which the Which is located in: + const SfxItemSet* pCurrentSet = this; + do + { + if( pCurrentSet->Count() ) + { + SfxPoolItem const** ppFnd = pCurrentSet->m_ppItems; + for (auto const & pPtr : pCurrentSet->m_pWhichRanges) + { + if( pPtr.first <= nWhich && nWhich <= pPtr.second ) + { + // In this Range + ppFnd += nWhich - pPtr.first; + if( *ppFnd ) + { + if( IsInvalidItem(*ppFnd) ) { + //FIXME: The following code is duplicated further down + assert(m_pPool); + //!((SfxAllItemSet *)this)->aDefault.SetWhich(nWhich); + //!return aDefault; + return m_pPool->GetDefaultItem( nWhich ); + } +#ifdef DBG_UTIL + const SfxPoolItem *pItem = *ppFnd; + if ( pItem->IsVoidItem() || !pItem->Which() ) + SAL_INFO("svl.items", "SFX_WARNING: Getting disabled Item"); +#endif + return **ppFnd; + } + break; // Continue with Parent + } + ppFnd += pPtr.second - pPtr.first + 1; + } + } +//TODO: Search until end of Range: What are we supposed to do now? To the Parent or Default?? +// if( !*pPtr ) // Until the end of the search Range? +// break; + if (!bSrchInParent) + break; + pCurrentSet = pCurrentSet->m_pParent; + } while (nullptr != pCurrentSet); + + // Get the Default from the Pool and return + assert(m_pPool); + return m_pPool->GetDefaultItem( nWhich ); +} + +/** + * Notification callback + */ +void SfxItemSet::Changed( const SfxPoolItem&, const SfxPoolItem& ) +{ +} + +sal_uInt16 SfxItemSet::TotalCount() const +{ + return svl::detail::CountRanges(m_pWhichRanges); +} + +/** + * Only retain the Items that are also present in rSet + * (nevermind their value). + */ +void SfxItemSet::Intersect( const SfxItemSet& rSet ) +{ + assert(m_pPool && "Not implemented without Pool"); + if( !Count() ) // None set? + return; + + // Delete all Items not contained in rSet + if( !rSet.Count() ) + { + ClearItem(); // Delete everything + return; + } + + // If the Ranges are identical, we can easily process it + if( m_pWhichRanges == rSet.m_pWhichRanges ) + { + sal_uInt16 nSize = TotalCount(); + SfxPoolItem const** ppFnd1 = m_ppItems; + SfxPoolItem const** ppFnd2 = rSet.m_ppItems; + + for( ; nSize; --nSize, ++ppFnd1, ++ppFnd2 ) + if( *ppFnd1 && !*ppFnd2 ) + { + // Delete from Pool + if( !IsInvalidItem( *ppFnd1 ) ) + { + sal_uInt16 nWhich = (*ppFnd1)->Which(); + if (SfxItemPool::IsWhich(nWhich)) + { + const SfxPoolItem& rNew = m_pParent + ? m_pParent->Get( nWhich ) + : m_pPool->GetDefaultItem( nWhich ); + + Changed( **ppFnd1, rNew ); + } + m_pPool->Remove( **ppFnd1 ); + } + *ppFnd1 = nullptr; + --m_nCount; + } + } + else + { + SfxWhichIter aIter( *this ); + sal_uInt16 nWhich = aIter.FirstWhich(); + while ( nWhich ) + { + if( SfxItemState::UNKNOWN == rSet.GetItemState( nWhich, false ) ) + aIter.ClearItem(); // Delete + nWhich = aIter.NextWhich(); + } + } +} + +void SfxItemSet::Differentiate( const SfxItemSet& rSet ) +{ + if( !Count() || !rSet.Count() )// None set? + return; + + // If the Ranges are identical, we can easily process it + if( m_pWhichRanges == rSet.m_pWhichRanges ) + { + sal_uInt16 nSize = TotalCount(); + SfxPoolItem const** ppFnd1 = m_ppItems; + SfxPoolItem const** ppFnd2 = rSet.m_ppItems; + + for( ; nSize; --nSize, ++ppFnd1, ++ppFnd2 ) + if( *ppFnd1 && *ppFnd2 ) + { + // Delete from Pool + if( !IsInvalidItem( *ppFnd1 ) ) + { + sal_uInt16 nWhich = (*ppFnd1)->Which(); + if (SfxItemPool::IsWhich(nWhich)) + { + const SfxPoolItem& rNew = m_pParent + ? m_pParent->Get( nWhich ) + : m_pPool->GetDefaultItem( nWhich ); + + Changed( **ppFnd1, rNew ); + } + m_pPool->Remove( **ppFnd1 ); + } + *ppFnd1 = nullptr; + --m_nCount; + } + } + else + { + SfxWhichIter aIter( *this ); + sal_uInt16 nWhich = aIter.FirstWhich(); + while ( nWhich ) + { + if( SfxItemState::SET == rSet.GetItemState( nWhich, false ) ) + aIter.ClearItem(); // Delete + nWhich = aIter.NextWhich(); + } + } +} + +/** + * Decision table for MergeValue(s) + * + * Principles: + * 1. If the Which value in the 1st set is "unknown", there's never any action + * 2. If the Which value in the 2nd set is "unknown", it's made the "default" + * 3. For comparisons the values of the "default" Items are take into account + * + * 1st Item 2nd Item Values bIgnoreDefs Remove Assign Add + * + * set set == sal_False - - - + * default set == sal_False - - - + * dontcare set == sal_False - - - + * unknown set == sal_False - - - + * set default == sal_False - - - + * default default == sal_False - - - + * dontcare default == sal_False - - - + * unknown default == sal_False - - - + * set dontcare == sal_False 1st Item -1 - + * default dontcare == sal_False - -1 - + * dontcare dontcare == sal_False - - - + * unknown dontcare == sal_False - - - + * set unknown == sal_False 1st Item -1 - + * default unknown == sal_False - - - + * dontcare unknown == sal_False - - - + * unknown unknown == sal_False - - - + * + * set set != sal_False 1st Item -1 - + * default set != sal_False - -1 - + * dontcare set != sal_False - - - + * unknown set != sal_False - - - + * set default != sal_False 1st Item -1 - + * default default != sal_False - - - + * dontcare default != sal_False - - - + * unknown default != sal_False - - - + * set dontcare != sal_False 1st Item -1 - + * default dontcare != sal_False - -1 - + * dontcare dontcare != sal_False - - - + * unknown dontcare != sal_False - - - + * set unknown != sal_False 1st Item -1 - + * default unknown != sal_False - - - + * dontcare unknown != sal_False - - - + * unknown unknown != sal_False - - - + * + * set set == sal_True - - - + * default set == sal_True - 2nd Item 2nd Item + * dontcare set == sal_True - - - + * unknown set == sal_True - - - + * set default == sal_True - - - + * default default == sal_True - - - + * dontcare default == sal_True - - - + * unknown default == sal_True - - - + * set dontcare == sal_True - - - + * default dontcare == sal_True - -1 - + * dontcare dontcare == sal_True - - - + * unknown dontcare == sal_True - - - + * set unknown == sal_True - - - + * default unknown == sal_True - - - + * dontcare unknown == sal_True - - - + * unknown unknown == sal_True - - - + * + * set set != sal_True 1st Item -1 - + * default set != sal_True - 2nd Item 2nd Item + * dontcare set != sal_True - - - + * unknown set != sal_True - - - + * set default != sal_True - - - + * default default != sal_True - - - + * dontcare default != sal_True - - - + * unknown default != sal_True - - - + * set dontcare != sal_True 1st Item -1 - + * default dontcare != sal_True - -1 - + * dontcare dontcare != sal_True - - - + * unknown dontcare != sal_True - - - + * set unknown != sal_True - - - + * default unknown != sal_True - - - + * dontcare unknown != sal_True - - - + * unknown unknown != sal_True - - - + */ +static void MergeItem_Impl( SfxItemPool *_pPool, sal_uInt16 &rCount, + const SfxPoolItem **ppFnd1, const SfxPoolItem *pFnd2, + bool bIgnoreDefaults ) +{ + assert(ppFnd1 != nullptr && "Merging to 0-Item"); + + // 1st Item is Default? + if ( !*ppFnd1 ) + { + if ( IsInvalidItem(pFnd2) ) + // Decision table: default, dontcare, doesn't matter, doesn't matter + *ppFnd1 = INVALID_POOL_ITEM; + + else if ( pFnd2 && !bIgnoreDefaults && + _pPool->GetDefaultItem(pFnd2->Which()) != *pFnd2 ) + // Decision table: default, set, !=, sal_False + *ppFnd1 = INVALID_POOL_ITEM; + + else if ( pFnd2 && bIgnoreDefaults ) + // Decision table: default, set, doesn't matter, sal_True + *ppFnd1 = &_pPool->Put( *pFnd2 ); + + if ( *ppFnd1 ) + ++rCount; + } + + // 1st Item set? + else if ( !IsInvalidItem(*ppFnd1) ) + { + if ( !pFnd2 ) + { + // 2nd Item is Default + if ( !bIgnoreDefaults && + **ppFnd1 != _pPool->GetDefaultItem((*ppFnd1)->Which()) ) + { + // Decision table: set, default, !=, sal_False + _pPool->Remove( **ppFnd1 ); + *ppFnd1 = INVALID_POOL_ITEM; + } + } + else if ( IsInvalidItem(pFnd2) ) + { + // 2nd Item is dontcare + if ( !bIgnoreDefaults || + **ppFnd1 != _pPool->GetDefaultItem( (*ppFnd1)->Which()) ) + { + // Decision table: set, dontcare, doesn't matter, sal_False + // or: set, dontcare, !=, sal_True + _pPool->Remove( **ppFnd1 ); + *ppFnd1 = INVALID_POOL_ITEM; + } + } + else + { + // 2nd Item is set + if ( **ppFnd1 != *pFnd2 ) + { + // Decision table: set, set, !=, doesn't matter + _pPool->Remove( **ppFnd1 ); + *ppFnd1 = INVALID_POOL_ITEM; + } + } + } +} + +void SfxItemSet::MergeValues( const SfxItemSet& rSet ) +{ + // WARNING! When making changes/fixing bugs, always update the table above!! + assert( GetPool() == rSet.GetPool() && "MergeValues with different Pools" ); + + // If the Ranges match, they are easier to process! + if( m_pWhichRanges == rSet.m_pWhichRanges ) + { + sal_uInt16 nSize = TotalCount(); + SfxPoolItem const** ppFnd1 = m_ppItems; + SfxPoolItem const** ppFnd2 = rSet.m_ppItems; + + for( ; nSize; --nSize, ++ppFnd1, ++ppFnd2 ) + MergeItem_Impl(m_pPool, m_nCount, ppFnd1, *ppFnd2, false/*bIgnoreDefaults*/); + } + else + { + SfxWhichIter aIter( rSet ); + sal_uInt16 nWhich; + while( 0 != ( nWhich = aIter.NextWhich() ) ) + { + const SfxPoolItem* pItem = nullptr; + (void)aIter.GetItemState( true, &pItem ); + if( !pItem ) + { + // Not set, so default + MergeValue( rSet.GetPool()->GetDefaultItem( nWhich ) ); + } + else if( IsInvalidItem( pItem ) ) + // don't care + InvalidateItem( nWhich ); + else + MergeValue( *pItem ); + } + } +} + +void SfxItemSet::MergeValue( const SfxPoolItem& rAttr, bool bIgnoreDefaults ) +{ + SfxPoolItem const** ppFnd = m_ppItems; + const sal_uInt16 nWhich = rAttr.Which(); + for( auto const & pPtr : m_pWhichRanges ) + { + // In this Range?? + if( pPtr.first <= nWhich && nWhich <= pPtr.second ) + { + ppFnd += nWhich - pPtr.first; + MergeItem_Impl(m_pPool, m_nCount, ppFnd, &rAttr, bIgnoreDefaults); + break; + } + ppFnd += pPtr.second - pPtr.first + 1; + } +} + +void SfxItemSet::InvalidateItem( sal_uInt16 nWhich ) +{ + SfxPoolItem const** ppFnd = m_ppItems; + for( auto const & pPtr : m_pWhichRanges ) + { + if( pPtr.first <= nWhich && nWhich <= pPtr.second ) + { + // In this Range? + ppFnd += nWhich - pPtr.first; + + if( *ppFnd ) // Set for me + { + if( !IsInvalidItem(*ppFnd) ) + { + m_pPool->Remove( **ppFnd ); + *ppFnd = INVALID_POOL_ITEM; + } + } + else + { + *ppFnd = INVALID_POOL_ITEM; + ++m_nCount; + } + break; + } + ppFnd += pPtr.second - pPtr.first + 1; + } +} + +sal_uInt16 SfxItemSet::GetWhichByPos( sal_uInt16 nPos ) const +{ + sal_uInt16 n = 0; + for( auto const & pPtr : m_pWhichRanges ) + { + n = ( pPtr.second - pPtr.first ) + 1; + if( nPos < n ) + return pPtr.first + nPos; + nPos = nPos - n; + } + assert(false); + return 0; +} + +bool SfxItemSet::operator==(const SfxItemSet &rCmp) const +{ + return Equals( rCmp, true); +} + +bool SfxItemSet::Equals(const SfxItemSet &rCmp, bool bComparePool) const +{ + // Values we can get quickly need to be the same + const bool bDifferentPools = (m_pPool != rCmp.m_pPool); + if ( (bComparePool && m_pParent != rCmp.m_pParent) || + (bComparePool && bDifferentPools) || + Count() != rCmp.Count() ) + return false; + + // If we reach here and bDifferentPools==true that means bComparePool==false. + + // Counting Ranges takes longer; they also need to be the same, however + sal_uInt16 nCount1 = TotalCount(); + sal_uInt16 nCount2 = rCmp.TotalCount(); + if ( nCount1 != nCount2 ) + return false; + + // Are the Ranges themselves unequal? + for (sal_Int32 i = 0; i < m_pWhichRanges.size(); ++i) + { + if (m_pWhichRanges[i] != rCmp.m_pWhichRanges[i]) + { + // We must use the slow method then + SfxWhichIter aIter( *this ); + for ( sal_uInt16 nWh = aIter.FirstWhich(); + nWh; + nWh = aIter.NextWhich() ) + { + // If the pointer of the poolable Items are unequal, the Items must match + const SfxPoolItem *pItem1 = nullptr, *pItem2 = nullptr; + if ( GetItemState( nWh, false, &pItem1 ) != + rCmp.GetItemState( nWh, false, &pItem2 ) || + ( pItem1 != pItem2 && + ( !pItem1 || IsInvalidItem(pItem1) || + (m_pPool->IsItemPoolable(*pItem1) && + *pItem1 != *pItem2 ) ) ) ) + return false; + } + + return true; + } + } + + // Are all pointers the same? + if (0 == memcmp( m_ppItems, rCmp.m_ppItems, nCount1 * sizeof(m_ppItems[0]) )) + return true; + + // We need to compare each one separately then + const SfxPoolItem **ppItem1 = m_ppItems; + const SfxPoolItem **ppItem2 = rCmp.m_ppItems; + for ( sal_uInt16 nPos = 0; nPos < nCount1; ++nPos ) + { + // If the pointers of the poolable Items are not the same, the Items + // must match + if ( *ppItem1 != *ppItem2 && + ( ( !*ppItem1 || !*ppItem2 ) || + ( IsInvalidItem(*ppItem1) || IsInvalidItem(*ppItem2) ) || + (!bDifferentPools && m_pPool->IsItemPoolable(**ppItem1)) || + **ppItem1 != **ppItem2 ) ) + return false; + + ++ppItem1; + ++ppItem2; + } + + return true; +} + +std::unique_ptr<SfxItemSet> SfxItemSet::Clone(bool bItems, SfxItemPool *pToPool ) const +{ + if (pToPool && pToPool != m_pPool) + { + std::unique_ptr<SfxItemSet> pNewSet(new SfxItemSet(*pToPool, m_pWhichRanges)); + if ( bItems ) + { + SfxWhichIter aIter(*pNewSet); + sal_uInt16 nWhich = aIter.FirstWhich(); + while ( nWhich ) + { + const SfxPoolItem* pItem; + if ( SfxItemState::SET == GetItemState( nWhich, false, &pItem ) ) + pNewSet->Put( *pItem, pItem->Which() ); + nWhich = aIter.NextWhich(); + } + } + return pNewSet; + } + else + return std::unique_ptr<SfxItemSet>(bItems + ? new SfxItemSet(*this) + : new SfxItemSet(*m_pPool, m_pWhichRanges)); +} + +SfxItemSet SfxItemSet::CloneAsValue(bool bItems, SfxItemPool *pToPool ) const +{ + // if you are trying to clone, then the thing you are cloning is polymorphic, which means + // it cannot be cloned as a value + assert((typeid(*this) == typeid(SfxItemSet)) && "cannot call this on a subclass of SfxItemSet"); + + if (pToPool && pToPool != m_pPool) + { + SfxItemSet aNewSet(*pToPool, m_pWhichRanges); + if ( bItems ) + { + SfxWhichIter aIter(aNewSet); + sal_uInt16 nWhich = aIter.FirstWhich(); + while ( nWhich ) + { + const SfxPoolItem* pItem; + if ( SfxItemState::SET == GetItemState( nWhich, false, &pItem ) ) + aNewSet.Put( *pItem, pItem->Which() ); + nWhich = aIter.NextWhich(); + } + } + return aNewSet; + } + else + return bItems + ? *this + : SfxItemSet(*m_pPool, m_pWhichRanges); +} + +void SfxItemSet::PutDirect(const SfxPoolItem &rItem) +{ + SfxPoolItem const** ppFnd = m_ppItems; + const sal_uInt16 nWhich = rItem.Which(); +#ifdef DBG_UTIL + IsPoolDefaultItem(&rItem) || m_pPool->CheckItemInPool(&rItem); + // Only cause assertion in the callees +#endif + for( auto const & pPtr : m_pWhichRanges) + { + if( pPtr.first <= nWhich && nWhich <= pPtr.second ) + { + // In this Range? + ppFnd += nWhich - pPtr.first; + const SfxPoolItem* pOld = *ppFnd; + if( pOld ) // One already present + { + if( rItem == **ppFnd ) + return; // Already present! + m_pPool->Remove( *pOld ); + } + else + ++m_nCount; + + // Add the new one + if( IsPoolDefaultItem(&rItem) ) + *ppFnd = &m_pPool->Put( rItem ); + else + { + *ppFnd = &rItem; + if( !IsStaticDefaultItem( &rItem ) ) + rItem.AddRef(); + } + + return; + } + ppFnd += pPtr.second - pPtr.first + 1; + } +} + +void SfxItemSet::dumpAsXml(xmlTextWriterPtr pWriter) const +{ + (void)xmlTextWriterStartElement(pWriter, BAD_CAST("SfxItemSet")); + SfxItemIter aIter(*this); + for (const SfxPoolItem* pItem = aIter.GetCurItem(); pItem; pItem = aIter.NextItem()) + { + if (IsInvalidItem(pItem)) + { + (void)xmlTextWriterStartElement(pWriter, BAD_CAST("invalid")); + (void)xmlTextWriterEndElement(pWriter); + } + else + { + pItem->dumpAsXml(pWriter); + } + } + (void)xmlTextWriterEndElement(pWriter); +} + + +// ----------------------------------------------- class SfxAllItemSet + +SfxAllItemSet::SfxAllItemSet( SfxItemPool &rPool ) +: SfxItemSet(rPool, SfxAllItemSetFlag::Flag) +{ +} + +SfxAllItemSet::SfxAllItemSet(const SfxItemSet &rCopy) +: SfxItemSet(rCopy) +{ +} + +/** + * Explicitly define this ctor to avoid auto-generation by the compiler. + * The compiler does not take the ctor with the 'const SfxItemSet&'! + */ +SfxAllItemSet::SfxAllItemSet(const SfxAllItemSet &rCopy) +: SfxItemSet(rCopy) +{ +} + +/** + * Putting with automatic extension of the WhichId with the ID of the Item. + */ +const SfxPoolItem* SfxAllItemSet::PutImpl( const SfxPoolItem& rItem, sal_uInt16 nWhich, bool bPassingOwnership ) +{ + MergeRange(nWhich, nWhich); + return SfxItemSet::PutImpl(rItem, nWhich, bPassingOwnership); +} + +/** + * Disable Item + * Using a VoidItem with Which value 0 + */ +void SfxItemSet::DisableItem(sal_uInt16 nWhich) +{ + Put( SfxVoidItem(0), nWhich ); +} + +std::unique_ptr<SfxItemSet> SfxAllItemSet::Clone(bool bItems, SfxItemPool *pToPool ) const +{ + if (pToPool && pToPool != m_pPool) + { + std::unique_ptr<SfxAllItemSet> pNewSet(new SfxAllItemSet( *pToPool )); + if ( bItems ) + pNewSet->Set( *this ); + return pNewSet; + } + else + return std::unique_ptr<SfxItemSet>(bItems ? new SfxAllItemSet(*this) : new SfxAllItemSet(*m_pPool)); +} + + +WhichRangesContainer::WhichRangesContainer( const WhichPair* wids, sal_Int32 nSize ) +{ + auto p = new WhichPair[nSize]; + for (int i=0; i<nSize; ++i) + p[i] = wids[i]; + m_pairs = p; + m_size = nSize; + m_bOwnRanges = true; +} + +WhichRangesContainer::WhichRangesContainer(sal_uInt16 nWhichStart, sal_uInt16 nWhichEnd) + : m_size(1), m_bOwnRanges(true) +{ + auto p = new WhichPair[1]; + p[0] = { nWhichStart, nWhichEnd }; + m_pairs = p; +} + +WhichRangesContainer::WhichRangesContainer(WhichRangesContainer && other) +{ + std::swap(m_pairs, other.m_pairs); + std::swap(m_size, other.m_size); + std::swap(m_bOwnRanges, other.m_bOwnRanges); +} + +WhichRangesContainer& WhichRangesContainer::operator=(WhichRangesContainer && other) +{ + std::swap(m_pairs, other.m_pairs); + std::swap(m_size, other.m_size); + std::swap(m_bOwnRanges, other.m_bOwnRanges); + return *this; +} + +WhichRangesContainer& WhichRangesContainer::operator=(WhichRangesContainer const & other) +{ + reset(); + m_size = other.m_size; + m_bOwnRanges = other.m_bOwnRanges; + if (m_bOwnRanges) + { + auto p = new WhichPair[m_size]; + for (int i=0; i<m_size; ++i) + p[i] = other.m_pairs[i]; + m_pairs = p; + } + else + m_pairs = other.m_pairs; + return *this; +} + +WhichRangesContainer::~WhichRangesContainer() +{ + reset(); +} + +bool WhichRangesContainer::operator==(WhichRangesContainer const & other) const +{ + if (m_size != other.m_size) + return false; + if (m_pairs == other.m_pairs) + return true; + return std::equal(m_pairs, m_pairs + m_size, other.m_pairs, other.m_pairs + m_size); +} + + +void WhichRangesContainer::reset() +{ + if (m_bOwnRanges) + { + delete [] m_pairs; + m_bOwnRanges = false; + } + m_pairs = nullptr; + m_size = 0; +} + +// Adds a range to which ranges, keeping the ranges in valid state (sorted, non-overlapping) +WhichRangesContainer WhichRangesContainer::MergeRange(sal_uInt16 nFrom, + sal_uInt16 nTo) const +{ + assert(svl::detail::validRange(nFrom, nTo)); + + if (empty()) + return WhichRangesContainer(nFrom, nTo); + + // create vector of ranges (sal_uInt16 pairs of lower and upper bound) + const size_t nOldCount = size(); + // Allocate one item more than we already have. + // In the worst case scenario we waste a little bit + // of memory, but we avoid another allocation, which is more important. + std::unique_ptr<WhichPair[]> aRangesTable(new WhichPair[nOldCount+1]); + int aRangesTableSize = 0; + bool bAdded = false; + for (const auto& rPair : *this) + { + if (!bAdded && rPair.first >= nFrom) + { // insert new range, keep ranges sorted + aRangesTable[aRangesTableSize++] = { nFrom, nTo }; + bAdded = true; + } + // insert current range + aRangesTable[aRangesTableSize++] = rPair; + } + if (!bAdded) + aRangesTable[aRangesTableSize++] = { nFrom, nTo }; + + // true if ranges overlap or adjoin, false if ranges are separate + auto needMerge = [](WhichPair lhs, WhichPair rhs) { + return (lhs.first - 1) <= rhs.second && (rhs.first - 1) <= lhs.second; + }; + + auto it = aRangesTable.get(); + auto endIt = aRangesTable.get() + aRangesTableSize; + // we have at least one range at this point + for (;;) + { + auto itNext = std::next(it); + if (itNext == endIt) + break; + // check if neighbouring ranges overlap or adjoin + if (needMerge(*it, *itNext)) + { + // lower bounds are sorted, implies: it->first = min(it[0].first, it[1].first) + it->second = std::max(it->second, itNext->second); + // remove next element + std::move(std::next(itNext), endIt, itNext); + --aRangesTableSize; + endIt = aRangesTable.get() + aRangesTableSize; + } + else + ++it; + } + + return WhichRangesContainer(std::move(aRangesTable), aRangesTableSize); +} + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |