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Diffstat (limited to 'sw/source/core/text/txtcache.cxx')
| -rw-r--r-- | sw/source/core/text/txtcache.cxx | 193 |
1 files changed, 193 insertions, 0 deletions
diff --git a/sw/source/core/text/txtcache.cxx b/sw/source/core/text/txtcache.cxx new file mode 100644 index 0000000000..188fa7bec6 --- /dev/null +++ b/sw/source/core/text/txtcache.cxx @@ -0,0 +1,193 @@ +/* -*- 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 "txtcache.hxx" +#include <txtfrm.hxx> +#include "porlay.hxx" + +#include <sfx2/viewsh.hxx> +#include <osl/diagnose.h> +#include <view.hxx> + +SwTextLine::SwTextLine( SwTextFrame const *pFrame, std::unique_ptr<SwParaPortion> pNew ) : + SwCacheObj( static_cast<void const *>(pFrame) ), + m_pLine( std::move(pNew) ) +{ +} + +SwTextLine::~SwTextLine() +{ +} + +void SwTextLine::UpdateCachePos() +{ + // note: SwTextFrame lives longer than its SwTextLine, see ~SwTextFrame + assert(m_pOwner); + const_cast<SwTextFrame *>(static_cast<SwTextFrame const *>(m_pOwner))->SetCacheIdx(GetCachePos()); +} + +SwCacheObj *SwTextLineAccess::NewObj() +{ + return new SwTextLine( static_cast<SwTextFrame const *>(m_pOwner) ); +} + +SwParaPortion *SwTextLineAccess::GetPara() +{ + SwTextLine *pRet; + if ( m_pObj ) + pRet = static_cast<SwTextLine*>(m_pObj); + else + { + pRet = static_cast<SwTextLine*>(Get(false)); + const_cast<SwTextFrame *>(static_cast<SwTextFrame const *>(m_pOwner))->SetCacheIdx( pRet->GetCachePos() ); + } + if ( !pRet->GetPara() ) + pRet->SetPara( new SwParaPortion, true/*bDelete*/ ); + return pRet->GetPara(); +} + +SwTextLineAccess::SwTextLineAccess( const SwTextFrame *pOwn ) : + SwCacheAccess( *SwTextFrame::GetTextCache(), pOwn, pOwn->GetCacheIdx() ) +{ +} + +bool SwTextLineAccess::IsAvailable() const +{ + return m_pObj && static_cast<SwTextLine*>(m_pObj)->GetPara(); +} + +bool SwTextFrame::HasPara_() const +{ + SwTextLine *pTextLine = static_cast<SwTextLine*>(SwTextFrame::GetTextCache()-> + Get( this, GetCacheIdx(), false )); + if ( pTextLine ) + { + if ( pTextLine->GetPara() ) + return true; + } + else + const_cast<SwTextFrame*>(this)->mnCacheIndex = USHRT_MAX; + + return false; +} + +SwParaPortion *SwTextFrame::GetPara() +{ + if ( GetCacheIdx() != USHRT_MAX ) + { + SwTextLine *pLine = static_cast<SwTextLine*>(SwTextFrame::GetTextCache()-> + Get( this, GetCacheIdx(), false )); + if ( pLine ) + return pLine->GetPara(); + else + mnCacheIndex = USHRT_MAX; + } + return nullptr; +} + +void SwTextFrame::ClearPara() +{ + OSL_ENSURE( !IsLocked(), "+SwTextFrame::ClearPara: this is locked." ); + if ( !IsLocked() && GetCacheIdx() != USHRT_MAX ) + { + SwTextLine *pTextLine = static_cast<SwTextLine*>(SwTextFrame::GetTextCache()-> + Get( this, GetCacheIdx(), false )); + if ( pTextLine ) + { + pTextLine->SetPara( nullptr, true/*bDelete*/ ); + } + else + mnCacheIndex = USHRT_MAX; + } +} + +void SwTextFrame::RemoveFromCache() +{ + if (GetCacheIdx() != USHRT_MAX) + { + s_pTextCache->Delete(this, GetCacheIdx()); + SetCacheIdx(USHRT_MAX); + } +} + +void SwTextFrame::SetPara( SwParaPortion *pNew, bool bDelete ) +{ + if ( GetCacheIdx() != USHRT_MAX ) + { + // Only change the information, the CacheObj stays there + SwTextLine *pTextLine = static_cast<SwTextLine*>(SwTextFrame::GetTextCache()-> + Get( this, GetCacheIdx(), false )); + if ( pTextLine ) + { + pTextLine->SetPara( pNew, bDelete ); + } + else + { + OSL_ENSURE( !pNew, "+SetPara: Losing SwParaPortion" ); + mnCacheIndex = USHRT_MAX; + } + } + else if ( pNew ) + { // Insert a new one + SwTextLine *pTextLine = new SwTextLine( this, std::unique_ptr<SwParaPortion>(pNew) ); + if (SwTextFrame::GetTextCache()->Insert(pTextLine, false)) + mnCacheIndex = pTextLine->GetCachePos(); + else + { + OSL_FAIL( "+SetPara: InsertCache failed." ); + } + } +} + +/** Prevent the SwParaPortions of the *visible* paragraphs from being deleted; + they would just be recreated on the next paint. + + Heuristic: 100 per view are visible + + If the cache is too small, enlarge it to ensure there are sufficient free + entries for the layout so it doesn't have to throw away a node's + SwParaPortion when it starts formatting the next node. +*/ +SwSaveSetLRUOfst::SwSaveSetLRUOfst() +{ + sal_uInt16 nVisibleShells(0); + for (auto pView = SfxViewShell::GetFirst(true, checkSfxViewShell<SwView>); + pView != nullptr; + pView = SfxViewShell::GetNext(*pView, true, checkSfxViewShell<SwView>)) + { + // Apparently we are not interested here what document pView is for, but only in the + // total number of shells in the process? + ++nVisibleShells; + } + + sal_uInt16 const nPreserved(100 * nVisibleShells); + SwCache & rCache(*SwTextFrame::GetTextCache()); + if (rCache.GetCurMax() < nPreserved + 250) + { + rCache.IncreaseMax(nPreserved + 250 - rCache.GetCurMax()); + } + rCache.SetLRUOfst(nPreserved); +} + +SwSaveSetLRUOfst::~SwSaveSetLRUOfst() +{ + SwTextFrame::GetTextCache()->ResetLRUOfst(); +} + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |