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Diffstat (limited to 'sw/source/core/text/widorp.cxx')
| -rw-r--r-- | sw/source/core/text/widorp.cxx | 673 |
1 files changed, 673 insertions, 0 deletions
diff --git a/sw/source/core/text/widorp.cxx b/sw/source/core/text/widorp.cxx new file mode 100644 index 0000000000..11e4193d7b --- /dev/null +++ b/sw/source/core/text/widorp.cxx @@ -0,0 +1,673 @@ +/* -*- 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 <layfrm.hxx> +#include <ftnboss.hxx> +#include <ndtxt.hxx> +#include <paratr.hxx> +#include <editeng/orphitem.hxx> +#include <editeng/widwitem.hxx> +#include <editeng/keepitem.hxx> +#include <editeng/spltitem.hxx> +#include <frmatr.hxx> +#include <txtftn.hxx> +#include <fmtftn.hxx> +#include <rowfrm.hxx> + +#include "widorp.hxx" +#include <txtfrm.hxx> +#include "itrtxt.hxx" +#include <sectfrm.hxx> +#include <ftnfrm.hxx> +#include <pagefrm.hxx> +#include <IDocumentSettingAccess.hxx> +#include <sortedobjs.hxx> +#include <anchoredobject.hxx> +#include <flyfrm.hxx> + +#undef WIDOWTWIPS + +namespace +{ + +// A Follow on the same page as its master is nasty. +bool IsNastyFollow( const SwTextFrame *pFrame ) +{ + OSL_ENSURE( !pFrame->IsFollow() || !pFrame->GetPrev() || + static_cast<const SwTextFrame*>(pFrame->GetPrev())->GetFollow() == pFrame, + "IsNastyFollow: What is going on here?" ); + return pFrame->IsFollow() && pFrame->GetPrev(); +} + +} + +SwTextFrameBreak::SwTextFrameBreak( SwTextFrame *pNewFrame, const SwTwips nRst ) + : m_nRstHeight(nRst), m_pFrame(pNewFrame) +{ + SwSwapIfSwapped swap(m_pFrame); + SwRectFnSet aRectFnSet(m_pFrame); + m_nOrigin = aRectFnSet.GetPrtTop(*m_pFrame); + m_bKeep = !m_pFrame->IsMoveable() || IsNastyFollow( m_pFrame ); + if( !m_bKeep && m_pFrame->IsInSct() ) + { + const SwSectionFrame* const pSct = m_pFrame->FindSctFrame(); + m_bKeep = pSct->Lower()->IsColumnFrame() && !pSct->MoveAllowed( m_pFrame ); + } + m_bKeep = m_bKeep || !m_pFrame->GetTextNodeForParaProps()->GetSwAttrSet().GetSplit().GetValue() || + m_pFrame->GetTextNodeForParaProps()->GetSwAttrSet().GetKeep().GetValue(); + m_bBreak = false; + + if( !m_nRstHeight && !m_pFrame->IsFollow() && m_pFrame->IsInFootnote() && m_pFrame->HasPara() ) + { + m_nRstHeight = m_pFrame->GetFootnoteFrameHeight(); + m_nRstHeight += aRectFnSet.GetHeight(m_pFrame->getFramePrintArea()) - + aRectFnSet.GetHeight(m_pFrame->getFrameArea()); + if( m_nRstHeight < 0 ) + m_nRstHeight = 0; + } +} + +/** + * BP 18.6.93: Widows. + * In contrast to the first implementation the Widows are not calculated + * in advance but detected when formatting the split Follow. + * In Master the Widows-calculation is dropped completely + * (nWidows is manipulated). If the Follow detects that the + * Widows rule applies it sends a Prepare to its predecessor. + * A special problem is when the Widow rule applies but in Master + * there are some lines available. + * + * BP(22.07.92): Calculation of Widows and Orphans. + * The method returns true if one of the rules matches. + * + * One difficulty with Widows and different formats between + * Master- and Follow-Frame: + * Example: If the first column is 3cm and the second is 4cm and + * Widows is set to 3, the decision if the Widows rule matches can not + * be done until the Follow is formatted. Unfortunately this is crucial + * to decide if the whole paragraph goes to the next page or not. + */ +bool SwTextFrameBreak::IsInside( SwTextMargin const &rLine ) const +{ + bool bFit = false; + + SwSwapIfSwapped swap(m_pFrame); + SwRectFnSet aRectFnSet(m_pFrame); + // nOrigin is an absolute value, rLine refers to the swapped situation. + + SwTwips nTmpY; + if ( m_pFrame->IsVertical() ) + nTmpY = m_pFrame->SwitchHorizontalToVertical( rLine.Y() + rLine.GetLineHeight() ); + else + nTmpY = rLine.Y() + rLine.GetLineHeight(); + + SwTwips nLineHeight = aRectFnSet.YDiff( nTmpY , m_nOrigin ); + + // Calculate extra space for bottom border. + nLineHeight += aRectFnSet.GetBottomMargin(*m_pFrame); + + if( m_nRstHeight ) + bFit = m_nRstHeight >= nLineHeight; + else + { + // The Frame has a height to fit on the page. + SwTwips nHeight = + aRectFnSet.YDiff( aRectFnSet.GetPrtBottom(*m_pFrame->GetUpper()), m_nOrigin ); + SwTwips nDiff = nHeight - nLineHeight; + + // Hide whitespace may require not to insert a new page. + SwPageFrame* pPageFrame = m_pFrame->FindPageFrame(); + if (!pPageFrame->CheckPageHeightValidForHideWhitespace(nDiff)) + nDiff = 0; + + // If everything is inside the existing frame the result is true; + bFit = nDiff >= 0; + + // If it didn't fit, try to add the space of footnotes that are anchored + // in frames below (in next-chain of) this one as they will need to move + // forward anyway if this frame is split. + // - except if in tables (need to check if row is splittable? + // also, multiple columns looks difficult) + if (!bFit && !m_pFrame->IsInTab()) + { + if (SwFootnoteBossFrame const*const pBoss = m_pFrame->FindFootnoteBossFrame()) + { + if (SwFootnoteContFrame const*const pCont = pBoss->FindFootnoteCont()) + { + SwContentFrame const* pContent(m_pFrame); + while (pContent->HasFollow()) + { + pContent = pContent->GetFollow(); + } + // start with first text frame that isn't a follow + // (ignoring Keep attribute for now, MakeAll should handle it?) + pContent = pContent->GetNextContentFrame(); + ::std::set<SwContentFrame const*> nextFrames; + while (pBoss->IsAnLower(pContent)) + { + nextFrames.insert(pContent); + pContent = pContent->GetNextContentFrame(); + } + SwTwips nNextFootnotes(0); + for (SwFootnoteFrame const* pFootnote = static_cast<SwFootnoteFrame const*>(pCont->Lower()); + pFootnote != nullptr; + pFootnote = static_cast<SwFootnoteFrame const*>(pFootnote->GetNext())) + { + SwContentFrame const*const pAnchor = pFootnote->GetRef(); + if (nextFrames.find(pAnchor) != nextFrames.end()) + { + nNextFootnotes += aRectFnSet.GetHeight(pFootnote->getFrameArea()); + } + } + bFit = 0 <= nDiff + nNextFootnotes; + SAL_INFO_IF(bFit, "sw.core", "no text frame break because ignoring " + << nNextFootnotes << " footnote height"); + } + } + } + if (!bFit && rLine.MaybeHasHints() && m_pFrame->GetFollow() + // tdf#153319 RemoveFootnote only works if this frame doesn't + && !rLine.GetNext() // contain the footnote portion + // if using same footnote container as the follow, pointless to try? + && m_pFrame->FindFootnoteBossFrame() != m_pFrame->GetFollow()->FindFootnoteBossFrame()) + { + // possibly a footnote that is anchored beyond the end of this + // (the last) line is in the way, try to remove it and check again + m_pFrame->RemoveFootnote(rLine.GetEnd()); + nHeight = aRectFnSet.YDiff( aRectFnSet.GetPrtBottom(*m_pFrame->GetUpper()), m_nOrigin ); + bFit = nHeight >= nLineHeight; + } + if ( !bFit ) + { + if ( rLine.GetNext() && + m_pFrame->IsInTab() && !m_pFrame->GetFollow() && !m_pFrame->GetIndNext() ) + { + // add additional space taken as lower space as last content in a table + // for all text lines except the last one. + nHeight += m_pFrame->CalcAddLowerSpaceAsLastInTableCell(); + bFit = nHeight >= nLineHeight; + } + } + if( !bFit ) + { + // The LineHeight exceeds the current Frame height. + // Call a test Grow to detect if the Frame could + // grow the requested area. + nHeight += m_pFrame->GrowTst( LONG_MAX ); + + // The Grow() returns the height by which the Upper of the TextFrame + // would let the TextFrame grow. + // The TextFrame itself can grow as much as it wants. + bFit = nHeight >= nLineHeight; + } + } + + return bFit; +} + +bool SwTextFrameBreak::IsBreakNow( SwTextMargin &rLine ) +{ + SwSwapIfSwapped swap(m_pFrame); + + // bKeep is stronger than IsBreakNow() + // Is there enough space ? + if( m_bKeep || IsInside( rLine ) ) + m_bBreak = false; + else + { + /* This class assumes that the SwTextMargin is processed from Top to + * Bottom. Because of performance reasons we stop splitting in the + * following cases: + * If only one line does not fit. + * Special case: with DummyPortions there is LineNr == 1, though we + * want to split. + */ + // Include DropLines + + bool bFirstLine = 1 == rLine.GetLineNr() && !rLine.GetPrev(); + m_bBreak = true; + + if (bFirstLine && m_pFrame->IsEmptyWithSplitFly()) + { + // Not really the first line, visually we may have a previous line (including the fly + // frame) already. + bFirstLine = false; + } + + if( ( bFirstLine && m_pFrame->GetIndPrev() ) + || ( rLine.GetLineNr() <= rLine.GetDropLines() ) ) + { + m_bKeep = true; + m_bBreak = false; + } + else if(bFirstLine && m_pFrame->IsInFootnote() && !m_pFrame->FindFootnoteFrame()->GetPrev()) + { + SwLayoutFrame* pTmp = m_pFrame->FindFootnoteBossFrame()->FindBodyCont(); + if( !pTmp || !pTmp->Lower() ) + m_bBreak = false; + } + } + + return m_bBreak; +} + +void SwTextFrameBreak::SetRstHeight( const SwTextMargin &rLine ) +{ + // Consider bottom margin + SwRectFnSet aRectFnSet(m_pFrame); + + m_nRstHeight = aRectFnSet.GetBottomMargin(*m_pFrame); + + if ( aRectFnSet.IsVert() ) + { + if ( m_pFrame->IsVertLR() ) + m_nRstHeight = aRectFnSet.YDiff( m_pFrame->SwitchHorizontalToVertical( rLine.Y() ) , m_nOrigin ); + else + m_nRstHeight += m_nOrigin - m_pFrame->SwitchHorizontalToVertical( rLine.Y() ); + } + else + m_nRstHeight += rLine.Y() - m_nOrigin; +} + +WidowsAndOrphans::WidowsAndOrphans( SwTextFrame *pNewFrame, const SwTwips nRst, + bool bChkKeep ) + : SwTextFrameBreak( pNewFrame, nRst ), m_nWidLines( 0 ), m_nOrphLines( 0 ) +{ + SwSwapIfSwapped swap(m_pFrame); + + if( m_bKeep ) + { + // If paragraph should not be split but is larger than + // the page, then bKeep is overruled. + if( bChkKeep && !m_pFrame->GetPrev() && !m_pFrame->IsInFootnote() && + m_pFrame->IsMoveable() && + ( !m_pFrame->IsInSct() || m_pFrame->FindSctFrame()->MoveAllowed(m_pFrame) ) ) + m_bKeep = false; + // Even if Keep is set, Orphans has to be respected. + // e.g. if there are chained frames where a Follow in the last frame + // receives a Keep, because it is not (forward) movable - + // nevertheless the paragraph can request lines from the Master + // because of the Orphan rule. + if( m_pFrame->IsFollow() ) + m_nWidLines = m_pFrame->GetTextNodeForParaProps()->GetSwAttrSet().GetWidows().GetValue(); + } + else + { + const SwAttrSet& rSet = m_pFrame->GetTextNodeForParaProps()->GetSwAttrSet(); + const SvxOrphansItem &rOrph = rSet.GetOrphans(); + if ( rOrph.GetValue() > 1 ) + m_nOrphLines = rOrph.GetValue(); + if ( m_pFrame->IsFollow() ) + m_nWidLines = rSet.GetWidows().GetValue(); + + } + + if ( !(m_bKeep || m_nWidLines || m_nOrphLines) ) + return; + + bool bResetFlags = false; + + bool bWordTableCell = false; + if (m_pFrame->IsInFly()) + { + // Enable widow / orphan control in Word-style table cells in split rows, at least inside + // flys. + const SwDoc& rDoc = m_pFrame->GetTextNodeForParaProps()->GetDoc(); + const IDocumentSettingAccess& rIDSA = rDoc.getIDocumentSettingAccess(); + bWordTableCell = rIDSA.get(DocumentSettingId::TABLE_ROW_KEEP); + } + + if ( m_pFrame->IsInTab() && !bWordTableCell ) + { + // For compatibility reasons, we disable Keep/Widows/Orphans + // inside splittable row frames: + if ( m_pFrame->GetNextCellLeaf() || m_pFrame->IsInFollowFlowRow() ) + { + const SwFrame* pTmpFrame = m_pFrame->GetUpper(); + while ( !pTmpFrame->IsRowFrame() ) + pTmpFrame = pTmpFrame->GetUpper(); + if ( static_cast<const SwRowFrame*>(pTmpFrame)->IsRowSplitAllowed() ) + bResetFlags = true; + } + } + + if( m_pFrame->IsInFootnote() && !m_pFrame->GetIndPrev() ) + { + // Inside of footnotes there are good reasons to turn off the Keep attribute + // as well as Widows/Orphans. + SwFootnoteFrame *pFootnote = m_pFrame->FindFootnoteFrame(); + const bool bFt = !pFootnote->GetAttr()->GetFootnote().IsEndNote(); + if( !pFootnote->GetPrev() && + pFootnote->FindFootnoteBossFrame( bFt ) != pFootnote->GetRef()->FindFootnoteBossFrame( bFt ) + && ( !m_pFrame->IsInSct() || m_pFrame->FindSctFrame()->MoveAllowed(m_pFrame) ) ) + { + bResetFlags = true; + } + } + + if ( bResetFlags ) + { + m_bKeep = false; + m_nOrphLines = 0; + m_nWidLines = 0; + } +} + +/** + * The Find*-Methods do not only search, but adjust the SwTextMargin to the + * line where the paragraph should have a break and truncate the paragraph there. + * FindBreak() + */ +bool WidowsAndOrphans::FindBreak( SwTextFrame *pFrame, SwTextMargin &rLine, + bool bHasToFit ) +{ + // i#16128 - Why member <pFrame> _*and*_ parameter <pFrame>?? + // Thus, assertion on situation, that these are different to figure out why. + OSL_ENSURE( m_pFrame == pFrame, "<WidowsAndOrphans::FindBreak> - pFrame != pFrame" ); + + SwSwapIfSwapped swap(m_pFrame); + + bool bRet = true; + sal_uInt16 nOldOrphans = m_nOrphLines; + if( bHasToFit ) + m_nOrphLines = 0; + rLine.Bottom(); + + if( !IsBreakNowWidAndOrp( rLine ) ) + bRet = false; + if( !FindWidows( pFrame, rLine ) ) + { + bool bBack = false; + + while( IsBreakNowWidAndOrp( rLine ) ) + { + if( rLine.PrevLine() ) + bBack = true; + else + break; + } + // Usually Orphans are not taken into account for HasToFit. + // But if Dummy-Lines are concerned and the Orphans rule is violated + // we make an exception: We leave behind one Dummyline and take + // the whole text to the next page/column. + if( rLine.GetLineNr() <= nOldOrphans && + rLine.GetInfo().GetParaPortion()->IsDummy() && + ( ( bHasToFit && bRet ) || IsBreakNow( rLine ) ) ) + rLine.Top(); + + rLine.TruncLines( true ); + bRet = bBack; + } + m_nOrphLines = nOldOrphans; + + return bRet; +} + +/** + * FindWidows positions the SwTextMargin of the Master to the line where to + * break by examining and formatting the Follow. + * Returns true if the Widows-rule matches, that means that the + * paragraph should not be split (keep) ! + */ +bool WidowsAndOrphans::FindWidows( SwTextFrame *pFrame, SwTextMargin &rLine ) +{ + OSL_ENSURE( ! pFrame->IsVertical() || ! pFrame->IsSwapped(), + "WidowsAndOrphans::FindWidows with swapped frame" ); + + if( !m_nWidLines || !pFrame->IsFollow() ) + return false; + + rLine.Bottom(); + + // We can still cut something off + SwTextFrame *pMaster = pFrame->FindMaster(); + OSL_ENSURE(pMaster, "+WidowsAndOrphans::FindWidows: Widows in a master?"); + if( !pMaster ) + return false; + + // If the first line of the Follow does not fit, the master + // probably is full of Dummies. In this case a PrepareHint::Widows would be fatal. + if( pMaster->GetOffset() == pFrame->GetOffset() ) + return false; + + // Remaining height of the master + SwRectFnSet aRectFnSet(pFrame); + + const SwTwips nDocPrtTop = aRectFnSet.GetPrtTop(*pFrame); + SwTwips nOldHeight; + SwTwips nTmpY = rLine.Y() + rLine.GetLineHeight(); + + if ( aRectFnSet.IsVert() ) + { + nTmpY = pFrame->SwitchHorizontalToVertical( nTmpY ); + nOldHeight = -aRectFnSet.GetHeight(pFrame->getFramePrintArea()); + } + else + nOldHeight = aRectFnSet.GetHeight(pFrame->getFramePrintArea()); + + const SwTwips nChg = aRectFnSet.YDiff( nTmpY, nDocPrtTop + nOldHeight ); + + // below the Widows-threshold... + if( rLine.GetLineNr() >= m_nWidLines ) + { + // Follow to Master I + // If the Follow *grows*, there is the chance for the Master to + // receive lines, that it was forced to hand over to the Follow lately: + // Prepare(Need); check that below nChg! + // (0W, 2O, 2M, 2F) + 1F = 3M, 2F + if( rLine.GetLineNr() > m_nWidLines && pFrame->IsJustWidow() ) + { + // If the Master is locked, it has probably just donated a line + // to us, we don't return that just because we turned it into + // multiple lines (e.g. via frames). + if( !pMaster->IsLocked() && pMaster->GetUpper() ) + { + const SwTwips nTmpRstHeight = aRectFnSet.BottomDist( pMaster->getFrameArea(), + aRectFnSet.GetPrtBottom(*pMaster->GetUpper()) ); + if ( nTmpRstHeight >= + rLine.GetInfo().GetParaPortion()->Height() ) + { + pMaster->Prepare( PrepareHint::AdjustSizeWithoutFormatting ); + pMaster->InvalidateSize_(); + pMaster->InvalidatePage(); + } + } + + pFrame->SetJustWidow( false ); + } + return false; + } + + // Follow to Master II + // If the Follow *shrinks*, maybe the Master can absorb the whole Orphan. + // (0W, 2O, 2M, 1F) - 1F = 3M, 0F -> PrepareHint::AdjustSizeWithoutFormatting + // (0W, 2O, 3M, 2F) - 1F = 2M, 2F -> PrepareHint::Widows + + if( 0 > nChg && !pMaster->IsLocked() && pMaster->GetUpper() ) + { + SwTwips nTmpRstHeight = aRectFnSet.BottomDist( pMaster->getFrameArea(), + aRectFnSet.GetPrtBottom(*pMaster->GetUpper()) ); + if( nTmpRstHeight >= rLine.GetInfo().GetParaPortion()->Height() ) + { + pMaster->Prepare( PrepareHint::AdjustSizeWithoutFormatting ); + pMaster->InvalidateSize_(); + pMaster->InvalidatePage(); + pFrame->SetJustWidow( false ); + return false; + } + } + + // Master to Follow + // If the Follow contains fewer lines than Widows after formatting, + // we still can move over some lines from the Master. If this triggers + // the Orphans rule of the Master, the Master frame must be Grow()n + // in its CalcPreps(), such that it won't fit onto its page anymore. + // But if the Master Frame can still lose a few lines, we need to + // do a Shrink() in the CalcPreps(); the Follow with the Widows then + // moves onto the page of the Master, but remains unsplit, so that + // it (finally) moves onto the next page. So much for the theory! + // + // We only request one line at a time for now, because a Master's line + // could result in multiple lines for us. + // Therefore, the CalcFollow() remains in control until the Follow got all + // necessary lines. + sal_Int32 nNeed = 1; // was: nWidLines - rLine.GetLineNr(); + + // Special case: Master cannot give lines to follow + // i#91421 + if ( !pMaster->GetIndPrev() ) + { + pMaster->ChgThisLines(); + sal_Int32 nLines = pMaster->GetThisLines(); + if(nLines == 0 && pMaster->HasPara()) + { + const SwParaPortion *pMasterPara = pMaster->GetPara(); + if(pMasterPara && pMasterPara->GetNext()) + nLines = 2; + } + if( nLines <= nNeed ) + return false; + + if (pFrame->IsInTab()) + { + const SwFrame* pRow = pFrame; + while (pRow && !pRow->IsRowFrame()) + { + pRow = pRow->GetUpper(); + } + + if (pRow && pRow->HasFixSize()) + { + // This is a follow frame and our side is fixed. + const SwAttrSet& rSet = pFrame->GetTextNodeForParaProps()->GetSwAttrSet(); + const SvxOrphansItem& rOrph = rSet.GetOrphans(); + if (nLines <= static_cast<sal_Int32>(rOrph.GetValue())) + { + // If the master gives us a line as part of widow control, then its orphan + // control will move everything to the follow, which is worse than having no + // widow / orphan control at all. Don't send a Widows prepare hint, in this + // case. + return true; + } + } + } + } + + pMaster->Prepare( PrepareHint::Widows, static_cast<void*>(&nNeed) ); + return true; +} + +namespace sw { + +auto FindNonFlyPortion(SwLineLayout const& rLine) -> bool +{ + for (SwLinePortion const* pPortion = rLine.GetFirstPortion(); + pPortion; pPortion = pPortion->GetNextPortion()) + { + switch (pPortion->GetWhichPor()) + { + case PortionType::Fly: + case PortionType::Glue: + case PortionType::Margin: + break; + default: + { + return true; + } + } + } + return false; +}; + +} // namespace sw + +bool WidowsAndOrphans::WouldFit( SwTextMargin &rLine, SwTwips &rMaxHeight, bool bTst, bool bMoveBwd ) +{ + // Here it does not matter, if pFrame is swapped or not. + // IsInside() takes care of itself + + // We expect that rLine is set to the last line + OSL_ENSURE( !rLine.GetNext(), "WouldFit: aLine::Bottom missed!" ); + sal_Int32 nLineCnt = rLine.GetLineNr(); + + // First satisfy the Orphans-rule and the wish for initials ... + const sal_uInt16 nMinLines = std::max( GetOrphansLines(), rLine.GetDropLines() ); + if ( nLineCnt < nMinLines ) + return false; + + rLine.Top(); + SwTwips nLineSum = rLine.GetLineHeight(); + + // tdf#146500 for MoveBwd(), want at least 1 line with non-fly + bool hasNonFly(!bMoveBwd); + if (!hasNonFly) + { + hasNonFly = ::sw::FindNonFlyPortion(*rLine.GetCurr()); + } + while (nMinLines > rLine.GetLineNr() || !hasNonFly) + { + if( !rLine.NextLine() ) + { + if (nMinLines > rLine.GetLineNr()) + return false; + else + break; + } + nLineSum += rLine.GetLineHeight(); + if (!hasNonFly) + { + hasNonFly = ::sw::FindNonFlyPortion(*rLine.GetCurr()); + } + } + + // We do not fit + if( !IsInside( rLine ) ) + return false; + + // Check the Widows-rule + if( !m_nWidLines && !m_pFrame->IsFollow() ) + { + // Usually we only have to check for Widows if we are a Follow. + // On WouldFit the rule has to be checked for the Master too, + // because we are just in the middle of calculating the break. + // In Ctor of WidowsAndOrphans the nWidLines are only calced for + // Follows from the AttrSet - so we catch up now: + const SwAttrSet& rSet = m_pFrame->GetTextNodeForParaProps()->GetSwAttrSet(); + m_nWidLines = rSet.GetWidows().GetValue(); + } + + // After Orphans/Initials, do enough lines remain for Widows? + // If we are currently doing a test formatting, we may not + // consider the widows rule for two reasons: + // 1. The columns may have different widths. + // Widow lines would have wrong width. + // 2. Test formatting is only done up to the given space. + // we do not have any lines for widows at all. + if( bTst || nLineCnt - nMinLines >= m_nWidLines ) + { + if( rMaxHeight >= nLineSum ) + { + rMaxHeight -= nLineSum; + return true; + } + } + return false; +} + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |