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Diffstat (limited to 'sw/source/core/text/txthyph.cxx')
| -rw-r--r-- | sw/source/core/text/txthyph.cxx | 582 |
1 files changed, 582 insertions, 0 deletions
diff --git a/sw/source/core/text/txthyph.cxx b/sw/source/core/text/txthyph.cxx new file mode 100644 index 0000000000..e9f6a9d0e6 --- /dev/null +++ b/sw/source/core/text/txthyph.cxx @@ -0,0 +1,582 @@ +/* -*- 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 <breakit.hxx> +#include <editeng/unolingu.hxx> +#include <com/sun/star/i18n/WordType.hpp> +#include <com/sun/star/i18n/XBreakIterator.hpp> +#include <viewopt.hxx> +#include <viewsh.hxx> +#include <SwPortionHandler.hxx> +#include "porhyph.hxx" +#include "inftxt.hxx" +#include "itrform2.hxx" +#include "guess.hxx" +#include <rootfrm.hxx> + +using namespace ::com::sun::star; +using namespace ::com::sun::star::uno; +using namespace ::com::sun::star::beans; +using namespace ::com::sun::star::linguistic2; +using namespace ::com::sun::star::i18n; + +Reference< XHyphenatedWord > SwTextFormatInfo::HyphWord( + const OUString &rText, const sal_Int32 nMinTrail ) +{ + if( rText.getLength() < 4 || m_pFnt->IsSymbol(m_pVsh) ) + return nullptr; + Reference< XHyphenator > xHyph = ::GetHyphenator(); + Reference< XHyphenatedWord > xHyphWord; + + if( xHyph.is() ) + xHyphWord = xHyph->hyphenate( rText, + g_pBreakIt->GetLocale( m_pFnt->GetLanguage() ), + rText.getLength() - nMinTrail, GetHyphValues() ); + return xHyphWord; + +} + +/** + * We format a row for interactive hyphenation + */ +bool SwTextFrame::Hyphenate(SwInterHyphInfoTextFrame & rHyphInf) +{ + vcl::RenderContext* pRenderContext = getRootFrame()->GetCurrShell()->GetOut(); + OSL_ENSURE( ! IsVertical() || ! IsSwapped(),"swapped frame at SwTextFrame::Hyphenate" ); + + assert(g_pBreakIt && g_pBreakIt->GetBreakIter().is()); + + // We lock it, to start with + OSL_ENSURE( !IsLocked(), "SwTextFrame::Hyphenate: this is locked" ); + + // The frame::Frame must have a valid SSize! + Calc(pRenderContext); + GetFormatted(); + + bool bRet = false; + if( !IsEmpty() ) + { + // We always need to enable hyphenation + // Don't be afraid: the SwTextIter saves the old row in the hyphenate + TextFrameLockGuard aLock( this ); + + if ( IsVertical() ) + SwapWidthAndHeight(); + + SwTextFormatInfo aInf( getRootFrame()->GetCurrShell()->GetOut(), this, true ); // true for interactive hyph! + SwTextFormatter aLine( this, &aInf ); + aLine.CharToLine( rHyphInf.m_nStart ); + + // If we're within the first word of a row, it could've been hyphenated + // in the row earlier. + // That's why we go one row back. + if( aLine.Prev() ) + { + SwLinePortion *pPor = aLine.GetCurr()->GetFirstPortion(); + while( pPor->GetNextPortion() ) + pPor = pPor->GetNextPortion(); + if( pPor->GetWhichPor() == PortionType::SoftHyphen || + pPor->GetWhichPor() == PortionType::SoftHyphenStr ) + aLine.Next(); + } + + const TextFrameIndex nEnd = rHyphInf.m_nEnd; + while( !bRet && aLine.GetStart() < nEnd ) + { + bRet = aLine.Hyphenate( rHyphInf ); + if( !aLine.Next() ) + break; + } + + if ( IsVertical() ) + SwapWidthAndHeight(); + } + return bRet; +} + +/** + * We format a row for interactive hyphenation + * We can assume that we've already formatted. + * We just reformat the row, the hyphenator will be prepared like + * the UI expects it to be. + * TODO: We can of course optimize this a lot. + */ +void SetParaPortion( SwTextInfo *pInf, SwParaPortion *pRoot ) +{ + OSL_ENSURE( pRoot, "SetParaPortion: no root anymore" ); + pInf->m_pPara = pRoot; +} + +bool SwTextFormatter::Hyphenate(SwInterHyphInfoTextFrame & rHyphInf) +{ + SwTextFormatInfo &rInf = GetInfo(); + + // We never need to hyphenate anything in the last row + // Except for, if it contains a FlyPortion or if it's the + // last row of the Master + if( !GetNext() && !rInf.GetTextFly().IsOn() && !m_pFrame->GetFollow() ) + return false; + + TextFrameIndex nWrdStart = m_nStart; + + // We need to retain the old row + // E.g.: The attribute for hyphenation was not set, but + // it's always set in SwTextFrame::Hyphenate, because we want + // to set breakpoints. + SwLineLayout *pOldCurr = m_pCurr; + + InitCntHyph(); + + // 5298: IsParaLine() (ex.IsFirstLine) calls GetParaPortion(). + // We have to create the same conditions: in the first line + // we format SwParaPortions... + if( pOldCurr->IsParaPortion() ) + { + SwParaPortion *pPara = new SwParaPortion(); + SetParaPortion( &rInf, pPara ); + m_pCurr = pPara; + OSL_ENSURE( IsParaLine(), "SwTextFormatter::Hyphenate: not the first" ); + } + else + m_pCurr = new SwLineLayout(); + + nWrdStart = FormatLine( nWrdStart ); + + // You always should keep in mind that for example there are fields + // which can be hyphenated + if( m_pCurr->PrtWidth() && m_pCurr->GetLen() ) + { + // We must be prepared that there are FlyFrames in the line, + // at which line breaking is possible. So we search for the first + // HyphPortion in the specified range. + + SwLinePortion *pPos = m_pCurr->GetNextPortion(); + const TextFrameIndex nPamStart = rHyphInf.m_nStart; + nWrdStart = m_nStart; + const TextFrameIndex nEnd = rHyphInf.m_nEnd; + while( pPos ) + { + // Either we are above or we are running into a HyphPortion + // at the end of line or before a Fly. + if( nWrdStart >= nEnd ) + { + nWrdStart = TextFrameIndex(0); + break; + } + + if( nWrdStart >= nPamStart && pPos->InHyphGrp() + && ( !pPos->IsSoftHyphPortion() + || static_cast<SwSoftHyphPortion*>(pPos)->IsExpand() ) ) + { + nWrdStart = nWrdStart + pPos->GetLen(); + break; + } + + nWrdStart = nWrdStart + pPos->GetLen(); + pPos = pPos->GetNextPortion(); + } + // When pPos is null, no hyphen position was found. + if( !pPos ) + nWrdStart = TextFrameIndex(0); + } + else + // In case the whole line is zero-length, that's the same situation as + // above when the portion iteration ends without explicitly breaking + // from the loop. + nWrdStart = TextFrameIndex(0); + + // the old LineLayout is set again ... + delete m_pCurr; + m_pCurr = pOldCurr; + + if( pOldCurr->IsParaPortion() ) + { + SetParaPortion( &rInf, static_cast<SwParaPortion*>(pOldCurr) ); + OSL_ENSURE( IsParaLine(), "SwTextFormatter::Hyphenate: even not the first" ); + } + + if (nWrdStart == TextFrameIndex(0)) + return false; + + // nWrdStart contains the position in string that should be hyphenated + rHyphInf.m_nWordStart = nWrdStart; + + TextFrameIndex nLen(0); + const TextFrameIndex nEnd = nWrdStart; + + // we search forwards + Reference< XHyphenatedWord > xHyphWord; + + Boundary const aBound = g_pBreakIt->GetBreakIter()->getWordBoundary( + rInf.GetText(), sal_Int32(nWrdStart), + g_pBreakIt->GetLocale( rInf.GetFont()->GetLanguage() ), WordType::DICTIONARY_WORD, true ); + nWrdStart = TextFrameIndex(aBound.startPos); + nLen = TextFrameIndex(aBound.endPos) - nWrdStart; + if (nLen == TextFrameIndex(0)) + return false; + + OUString const aSelText(rInf.GetText().copy(sal_Int32(nWrdStart), sal_Int32(nLen))); + const sal_Int32 nMinTrail = (nWrdStart + nLen > nEnd) + ? sal_Int32(nWrdStart + nLen - nEnd) - 1 + : 0; + + //!! rHyphInf.SetHyphWord( ... ) must done here + xHyphWord = rInf.HyphWord( aSelText, nMinTrail ); + if ( xHyphWord.is() ) + { + rHyphInf.SetHyphWord( xHyphWord ); + rHyphInf.m_nWordStart = nWrdStart; + rHyphInf.m_nWordLen = nLen; + return true; + } + + return false; +} + +bool SwTextPortion::CreateHyphen( SwTextFormatInfo &rInf, SwTextGuess const &rGuess ) +{ + const Reference< XHyphenatedWord >& xHyphWord = rGuess.HyphWord(); + + OSL_ENSURE( !mpNextPortion, "SwTextPortion::CreateHyphen(): another portion, another planet..." ); + OSL_ENSURE( xHyphWord.is(), "SwTextPortion::CreateHyphen(): You are lucky! The code is robust here." ); + + if( rInf.IsHyphForbud() || + mpNextPortion || // robust + !xHyphWord.is() || // more robust + // multi-line fields can't be hyphenated interactively + ( rInf.IsInterHyph() && InFieldGrp() ) ) + return false; + + std::unique_ptr<SwHyphPortion> pHyphPor; + TextFrameIndex nPorEnd; + SwTextSizeInfo aInf( rInf ); + + // first case: hyphenated word has alternative spelling + if ( xHyphWord->isAlternativeSpelling() ) + { + SvxAlternativeSpelling aAltSpell = SvxGetAltSpelling( xHyphWord ); + OSL_ENSURE( aAltSpell.bIsAltSpelling, "no alternative spelling" ); + + OUString aAltText = aAltSpell.aReplacement; + nPorEnd = TextFrameIndex(aAltSpell.nChangedPos) + rGuess.BreakStart() - rGuess.FieldDiff(); + sal_Int32 nTmpLen = 0; + + // soft hyphen at alternative spelling position? + if( rInf.GetText()[sal_Int32(rInf.GetSoftHyphPos())] == CHAR_SOFTHYPHEN ) + { + pHyphPor.reset(new SwSoftHyphStrPortion( aAltText )); + nTmpLen = 1; + } + else { + pHyphPor.reset(new SwHyphStrPortion( aAltText )); + } + + // length of pHyphPor is adjusted + pHyphPor->SetLen( TextFrameIndex(aAltText.getLength() + 1) ); + static_cast<SwPosSize&>(*pHyphPor) = pHyphPor->GetTextSize( rInf ); + pHyphPor->SetLen( TextFrameIndex(aAltSpell.nChangedLength + nTmpLen) ); + } + else + { + // second case: no alternative spelling + pHyphPor.reset(new SwHyphPortion); + pHyphPor->SetLen(TextFrameIndex(1)); + + static const void* nLastFontCacheId = nullptr; + static sal_uInt16 aMiniCacheH = 0, aMiniCacheW = 0; + const void* nTmpFontCacheId; + sal_uInt16 nFntIdx; + rInf.GetFont()->GetFontCacheId( nTmpFontCacheId, nFntIdx, rInf.GetFont()->GetActual() ); + if( !nLastFontCacheId || nLastFontCacheId != nTmpFontCacheId ) { + nLastFontCacheId = nTmpFontCacheId; + static_cast<SwPosSize&>(*pHyphPor) = pHyphPor->GetTextSize( rInf ); + aMiniCacheH = pHyphPor->Height(); + aMiniCacheW = pHyphPor->Width(); + } else { + pHyphPor->Height( aMiniCacheH ); + pHyphPor->Width( aMiniCacheW ); + } + pHyphPor->SetLen(TextFrameIndex(0)); + + // values required for this + nPorEnd = TextFrameIndex(xHyphWord->getHyphenPos() + 1) + + rGuess.BreakStart() - rGuess.FieldDiff(); + } + + // portion end must be in front of us + // we do not put hyphens at start of line + if ( nPorEnd > rInf.GetIdx() || + ( nPorEnd == rInf.GetIdx() && rInf.GetLineStart() != rInf.GetIdx() ) ) + { + aInf.SetLen( nPorEnd - rInf.GetIdx() ); + pHyphPor->SetAscent( GetAscent() ); + SetLen( aInf.GetLen() ); + CalcTextSize( aInf ); + + Insert( pHyphPor.release() ); + + short nKern = rInf.GetFont()->CheckKerning(); + if( nKern ) + new SwKernPortion( *this, nKern ); + + return true; + } + + // last exit for the lost + pHyphPor.reset(); + BreakCut( rInf, rGuess ); + return false; +} + +bool SwHyphPortion::GetExpText( const SwTextSizeInfo &/*rInf*/, OUString &rText ) const +{ + rText = "-"; + return true; +} + +void SwHyphPortion::HandlePortion( SwPortionHandler& rPH ) const +{ + rPH.Special( GetLen(), OUString('-'), GetWhichPor() ); +} + +void SwHyphPortion::dumpAsXml(xmlTextWriterPtr pWriter, const OUString& rText, + TextFrameIndex& nOffset) const +{ + (void)xmlTextWriterStartElement(pWriter, BAD_CAST("SwHyphPortion")); + dumpAsXmlAttributes(pWriter, rText, nOffset); + nOffset += GetLen(); + + (void)xmlTextWriterEndElement(pWriter); +} + +bool SwHyphPortion::Format( SwTextFormatInfo &rInf ) +{ + const SwLinePortion *pLast = rInf.GetLast(); + Height( pLast->Height() ); + SetAscent( pLast->GetAscent() ); + OUString aText; + + if( !GetExpText( rInf, aText ) ) + return false; + + PrtWidth( rInf.GetTextSize( aText ).Width() ); + const bool bFull = rInf.Width() <= rInf.X() + PrtWidth(); + if( bFull && !rInf.IsUnderflow() ) { + Truncate(); + rInf.SetUnderflow( this ); + } + + return bFull; +} + +bool SwHyphStrPortion::GetExpText( const SwTextSizeInfo &, OUString &rText ) const +{ + rText = m_aExpand; + return true; +} + +void SwHyphStrPortion::HandlePortion( SwPortionHandler& rPH ) const +{ + rPH.Special( GetLen(), m_aExpand, GetWhichPor() ); +} + +SwLinePortion *SwSoftHyphPortion::Compress() { return this; } + +SwSoftHyphPortion::SwSoftHyphPortion() : + m_bExpand(false), m_nViewWidth(0) +{ + SetLen(TextFrameIndex(1)); + SetWhichPor( PortionType::SoftHyphen ); +} + +sal_uInt16 SwSoftHyphPortion::GetViewWidth( const SwTextSizeInfo &rInf ) const +{ + // Although we're in the const, nViewWidth should be calculated at + // the last possible moment + if( !Width() && rInf.OnWin() && rInf.GetOpt().IsSoftHyph() && !IsExpand() ) + { + if( !m_nViewWidth ) + const_cast<SwSoftHyphPortion*>(this)->m_nViewWidth + = rInf.GetTextSize(OUString('-')).Width(); + } + else + const_cast<SwSoftHyphPortion*>(this)->m_nViewWidth = 0; + return m_nViewWidth; +} + +/** + * Cases: + * + * 1) SoftHyph is in the line, ViewOpt off + * -> invisible, neighbors unchanged + * 2) SoftHyph is in the line, ViewOpt on + * -> visible, neighbors unchanged + * 3) SoftHyph is at the end of the line, ViewOpt on or off + * -> always visible, neighbors unchanged + */ +void SwSoftHyphPortion::Paint( const SwTextPaintInfo &rInf ) const +{ + if( Width() ) + { + rInf.DrawViewOpt( *this, PortionType::SoftHyphen ); + SwExpandPortion::Paint( rInf ); + } +} + +/** + * We get the final width from the FormatEOL() + * + * During the underflow-phase we determine, whether or not + * there's an alternative spelling at all ... + * + * Case 1: "Au-to" + * 1) {Au}{-}{to}, {to} does not fit anymore => underflow + * 2) {-} calls hyphenate => no alternative + * 3) FormatEOL() and bFull = true + * + * Case 2: "Zuc-ker" + * 1) {Zuc}{-}{ker}, {ker} does not fit anymore => underflow + * 2) {-} calls hyphenate => alternative! + * 3) Underflow() and bFull = true + * 4) {Zuc} calls hyphenate => {Zuk}{-}{ker} + */ +bool SwSoftHyphPortion::Format( SwTextFormatInfo &rInf ) +{ + bool bFull = true; + + // special case for old German spelling + if( rInf.IsUnderflow() ) + { + if( rInf.GetSoftHyphPos() ) + return true; + + const bool bHyph = rInf.ChgHyph( true ); + if( rInf.IsHyphenate() ) + { + rInf.SetSoftHyphPos( rInf.GetIdx() ); + Width(0); + // if the soft hyphened word has an alternative spelling + // when hyphenated (old German spelling), the soft hyphen + // portion has to trigger an underflow + SwTextGuess aGuess; + bFull = rInf.IsInterHyph() || + !aGuess.AlternativeSpelling(rInf, rInf.GetIdx() - TextFrameIndex(1)); + } + rInf.ChgHyph( bHyph ); + + if( bFull && !rInf.IsHyphForbud() ) + { + rInf.SetSoftHyphPos(TextFrameIndex(0)); + FormatEOL( rInf ); + if ( rInf.GetFly() ) + rInf.GetRoot()->SetMidHyph( true ); + else + rInf.GetRoot()->SetEndHyph( true ); + } + else + { + rInf.SetSoftHyphPos( rInf.GetIdx() ); + Truncate(); + rInf.SetUnderflow( this ); + } + return true; + } + + rInf.SetSoftHyphPos(TextFrameIndex(0)); + SetExpand( true ); + bFull = SwHyphPortion::Format( rInf ); + SetExpand( false ); + if( !bFull ) + { + // By default, we do not have a width, but we do have a height + Width(0); + } + return bFull; +} + +/** + * Format End of Line + */ +void SwSoftHyphPortion::FormatEOL( SwTextFormatInfo &rInf ) +{ + if( IsExpand() ) + return; + + SetExpand( true ); + if( rInf.GetLast() == this ) + rInf.SetLast( FindPrevPortion( rInf.GetRoot() ) ); + + // We need to reset the old values + const SwTwips nOldX = rInf.X(); + TextFrameIndex const nOldIdx = rInf.GetIdx(); + rInf.X( rInf.X() - PrtWidth() ); + rInf.SetIdx( rInf.GetIdx() - GetLen() ); + const bool bFull = SwHyphPortion::Format( rInf ); + + // Shady business: We're allowed to get wider, but a Fly is also + // being processed, which needs a correct X position + if( bFull || !rInf.GetFly() ) + rInf.X( nOldX ); + else + rInf.X( nOldX + Width() ); + rInf.SetIdx( nOldIdx ); +} + +/** + * We're expanding: + * - if the special characters should be visible + * - if we're at the end of the line + * - if we're before a (real/emulated) line break + */ +bool SwSoftHyphPortion::GetExpText( const SwTextSizeInfo &rInf, OUString &rText ) const +{ + if( IsExpand() || ( rInf.OnWin() && rInf.GetOpt().IsSoftHyph() ) || + ( GetNextPortion() && ( GetNextPortion()->InFixGrp() || + GetNextPortion()->IsDropPortion() || GetNextPortion()->IsLayPortion() || + GetNextPortion()->IsParaPortion() || GetNextPortion()->IsBreakPortion() ) ) ) + { + return SwHyphPortion::GetExpText( rInf, rText ); + } + return false; +} + +void SwSoftHyphPortion::HandlePortion( SwPortionHandler& rPH ) const +{ + const PortionType nWhich = ! Width() ? + PortionType::SoftHyphenComp : + GetWhichPor(); + rPH.Special( GetLen(), OUString('-'), nWhich ); +} + +void SwSoftHyphStrPortion::Paint( const SwTextPaintInfo &rInf ) const +{ + // Bug or feature?: + // {Zu}{k-}{ker}, {k-} will be gray instead of {-} + rInf.DrawViewOpt( *this, PortionType::SoftHyphen ); + SwHyphStrPortion::Paint( rInf ); +} + +SwSoftHyphStrPortion::SwSoftHyphStrPortion( std::u16string_view rStr ) + : SwHyphStrPortion( rStr ) +{ + SetLen(TextFrameIndex(1)); + SetWhichPor( PortionType::SoftHyphenStr ); +} + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |