b66db1c73f
bUndersized was used uninitialized in derived SwFlowFrm, as valgrinding sw/qa/unoapi revealed.
252 lines
9.5 KiB
C++
252 lines
9.5 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*************************************************************************
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*
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* Copyright 2000, 2010 Oracle and/or its affiliates.
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*
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* OpenOffice.org - a multi-platform office productivity suite
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*
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* This file is part of OpenOffice.org.
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*
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* OpenOffice.org is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License version 3
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* only, as published by the Free Software Foundation.
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*
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* OpenOffice.org is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License version 3 for more details
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* (a copy is included in the LICENSE file that accompanied this code).
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*
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* You should have received a copy of the GNU Lesser General Public License
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* version 3 along with OpenOffice.org. If not, see
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* <http://www.openoffice.org/license.html>
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* for a copy of the LGPLv3 License.
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*
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************************************************************************/
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#ifndef _FLOWFRM_HXX
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#define _FLOWFRM_HXX
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//Der FlowFrm gibt die Funktionalitaet fuer alle Frms vor, die fliessen und
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//die sich aufspalten koennen (wie CntntFrm oder TabFrm).
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//Teile der Funktionalitaet sind im FlowFrm implementiert, andere Teile werden
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//von den spezifischen Frms implementiert.
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//Der FlowFrm ist kein eigenstaender Frm, es kann also auch niemals eine
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//eigenstaendige Instanz vom FlowFrm existieren.
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//Der FlowFrm ist nicht einmal ein echter Frm. Die naheliegende Implementierung
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//waere ein FlowFrm der virtual vom SwFrm abgeleitet ist und direkt auf den
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//eigenen Instanzdaten arbeitet. Abgeleitete Klassen muessten sich
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//vom FlowFrm und (ueber mehrere Basisklassen weil der Klassenbaum sich direkt
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//vom SwFrm zu SwCntntFrm und zum SwLayoutFrm spaltet) virtual vom SwFrm
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//ableiten.
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//Leider entstehen dadurch - neben Problemen mit Compilern und Debuggern -
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//erhebliche zusaetzliche Kosten, die wir uns heutzutage IMHO nicht erlauben
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//koennen.
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//Ich greife deshalb auf eine andere Technik zurueck: Der FlowFrm hat eine
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//Referenz auf den SwFrm - der er genau betrachtet selbst ist - und ist mit
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//diesem befreundet. So kann der FlowFrm anstelle des this-Pointer mit der
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//Referenz auf den SwFrm arbeiten.
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class SwPageFrm;
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class SwRect;
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class SwBorderAttrs;
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class SwDoc;
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class SwNodeIndex;
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// #i44049#
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class SwObjectFormatterTxtFrm;
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void MakeFrms( SwDoc *, const SwNodeIndex &, const SwNodeIndex & );
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class SwFlowFrm
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{
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//PrepareMake darf Locken/Unlocken (Robustheit)
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friend inline void PrepareLock ( SwFlowFrm * );
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friend inline void PrepareUnlock( SwFlowFrm * );
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friend inline void TableSplitRecalcLock( SwFlowFrm * );
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friend inline void TableSplitRecalcUnlock( SwFlowFrm * );
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// #i44049#
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friend class SwObjectFormatterTxtFrm;
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//TblSel darf das Follow-Bit zuruecksetzen.
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friend inline void UnsetFollow( SwFlowFrm *pFlow );
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friend void MakeFrms( SwDoc *, const SwNodeIndex &, const SwNodeIndex & );
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friend class SwNode2LayImpl;
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SwFrm &rThis;
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//Hilfsfunktionen fuer MoveSubTree()
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static SwLayoutFrm *CutTree( SwFrm* );
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static sal_Bool PasteTree( SwFrm *, SwLayoutFrm *, SwFrm *, SwFrm* );
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//Wird fuer das Zusammenspiel von _GetPrevxxx und MoveBwd gebraucht, damit
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//mehrere Blaetter gleichzeitig uebersprungen werden koennen.
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//Wird auch vom MoveBwd des TabFrm ausgewertet!
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static sal_Bool bMoveBwdJump;
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/** helper method to determine previous frame for calculation of the
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upper space
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#i11860#
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@param _pProposedPrevFrm
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optional input parameter - pointer to frame, which should be used
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instead of the direct previous frame.
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*/
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const SwFrm* _GetPrevFrmForUpperSpaceCalc( const SwFrm* _pProposedPrevFrm = 0L ) const;
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/** method to detemine the upper space amount, which is considered for
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the previous frame
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#i11860#
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*/
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SwTwips _GetUpperSpaceAmountConsideredForPrevFrm() const;
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/** method to detemine the upper space amount, which is considered for
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the page grid
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#i11860#
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*/
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SwTwips _GetUpperSpaceAmountConsideredForPageGrid(
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const SwTwips _nUpperSpaceWithoutGrid ) const;
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protected:
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SwFlowFrm *pFollow;
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SwFlowFrm *pPrecede;
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sal_Bool bIsFollow :1; //Ist's ein Follow
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sal_Bool bLockJoin :1; //Join (und damit deleten) verboten wenn sal_True!
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sal_Bool bUndersized:1; // wir sind kleiner als gewuenscht
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sal_Bool bFlyLock :1; // Stop positioning of at-character flyframes
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//Prueft ob Vorwaertsfluss noch Sinn macht Endloswanderschaften (unterbinden)
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inline sal_Bool IsFwdMoveAllowed();
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// #i44049# - method <CalcCntnt(..)> has to check this property.
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friend void CalcCntnt( SwLayoutFrm *pLay, bool bNoColl, bool bNoCalcFollow );
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sal_Bool IsKeepFwdMoveAllowed(); //Wie oben, Move fuer Keep.
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//Prueft ob ein Obj das Umlauf wuenscht ueberlappt.
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//eine Null bedeutet, kein Objekt ueberlappt,
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// 1 heisst, Objekte, die am FlowFrm selbst verankert sind, ueberlappen
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// 2 heisst, Objekte, die woanders verankert sind, ueberlappen
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// 3 heistt, beiderlei verankerte Objekte ueberlappen
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sal_uInt8 BwdMoveNecessary( const SwPageFrm *pPage, const SwRect &rRect );
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void LockJoin() { bLockJoin = sal_True; }
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void UnlockJoin() { bLockJoin = sal_False; }
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sal_Bool CheckMoveFwd( sal_Bool &rbMakePage, sal_Bool bKeep, sal_Bool bMovedBwd );
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sal_Bool MoveFwd( sal_Bool bMakePage, sal_Bool bPageBreak, sal_Bool bMoveAlways = sal_False );
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virtual sal_Bool ShouldBwdMoved( SwLayoutFrm *pNewUpper, sal_Bool bHead, sal_Bool &rReformat )=0;
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sal_Bool MoveBwd( sal_Bool &rbReformat );
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public:
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SwFlowFrm( SwFrm &rFrm );
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const SwFrm *GetFrm() const { return &rThis; }
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SwFrm *GetFrm() { return &rThis; }
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static sal_Bool IsMoveBwdJump() { return bMoveBwdJump; }
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static void SetMoveBwdJump( sal_Bool bNew ){ bMoveBwdJump = bNew; }
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inline void SetUndersized( const sal_Bool bNew ) { bUndersized = bNew; }
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inline sal_Bool IsUndersized() const { return bUndersized; }
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sal_Bool IsPrevObjMove() const;
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//Die Kette mit minimalen Operationen und Benachrichtigungen unter den
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//neuen Parent Moven.
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void MoveSubTree( SwLayoutFrm* pParent, SwFrm* pSibling = 0 );
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sal_Bool HasFollow() const { return pFollow ? sal_True : sal_False; }
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sal_Bool IsFollow() const { return bIsFollow; }
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inline void _SetIsFollow( sal_Bool bSet ) { bIsFollow = bSet; }
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const SwFlowFrm *GetFollow() const { return pFollow; }
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SwFlowFrm *GetFollow() { return pFollow; }
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sal_Bool IsAnFollow( const SwFlowFrm *pFlow ) const;
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inline void SetFollow( SwFlowFrm *pNew );
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const SwFlowFrm *GetPrecede() const { return pPrecede; }
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SwFlowFrm *GetPrecede() { return pPrecede; }
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sal_Bool IsJoinLocked() const { return bLockJoin; }
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sal_Bool IsAnyJoinLocked() const { return bLockJoin || HasLockedFollow(); }
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sal_Bool IsPageBreak( sal_Bool bAct ) const;
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sal_Bool IsColBreak( sal_Bool bAct ) const;
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//Ist ein Keep zu beruecksichtigen (Breaks!)
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sal_Bool IsKeep( const SwAttrSet& rAttrs, bool bBreakCheck = false ) const;
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sal_Bool HasLockedFollow() const;
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sal_Bool HasParaSpaceAtPages( sal_Bool bSct ) const;
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/** method to determine the upper space hold by the frame
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#i11860# - add 3rd parameter <_bConsiderGrid> to get
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the upper space with and without considering the page grid
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(default value: <sal_True>)
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*/
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SwTwips CalcUpperSpace( const SwBorderAttrs *pAttrs = NULL,
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const SwFrm* pPr = NULL,
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const bool _bConsiderGrid = true ) const;
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/** method to determine the upper space amount, which is considered for
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the previous frame and the page grid, if option 'Use former object
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positioning' is OFF
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#i11860#
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*/
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SwTwips GetUpperSpaceAmountConsideredForPrevFrmAndPageGrid() const;
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/** calculation of lower space
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*/
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SwTwips CalcLowerSpace( const SwBorderAttrs* _pAttrs = 0L ) const;
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/** calculation of the additional space to be considered, if flow frame
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is the last inside a table cell
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#i26250
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@param _pAttrs
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optional input parameter - border attributes of the flow frame.
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Used for optimization, if caller has already determined the border
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attributes.
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@return SwTwips
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*/
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SwTwips CalcAddLowerSpaceAsLastInTableCell(
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const SwBorderAttrs* _pAttrs = 0L ) const;
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void CheckKeep();
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void SetFlyLock( sal_Bool bNew ){ bFlyLock = bNew; }
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sal_Bool IsFlyLock() const { return bFlyLock; }
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//casten einen Frm auf einen FlowFrm - wenns denn einer ist, sonst 0
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//Diese Methoden muessen fuer neue Ableitungen geaendert werden!
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static SwFlowFrm *CastFlowFrm( SwFrm *pFrm );
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static const SwFlowFrm *CastFlowFrm( const SwFrm *pFrm );
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};
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inline sal_Bool SwFlowFrm::IsFwdMoveAllowed()
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{
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return rThis.GetIndPrev() != 0;
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}
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inline void SwFlowFrm::SetFollow( SwFlowFrm *pNew )
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{
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pFollow = pNew;
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if ( pFollow != NULL )
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pFollow->pPrecede = this;
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}
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#endif
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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