itrform2.hxx

Go to the documentation of this file.

/* -*- 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 .
 */
#ifndef INCLUDED_SW_SOURCE_CORE_TEXT_ITRFORM2_HXX
#define INCLUDED_SW_SOURCE_CORE_TEXT_ITRFORM2_HXX
#include "itrpaint.hxx"

class SwFlyCntPortion;
class SwDropPortion;
class SwFormatDrop;
class SwTextAttr;
class SwNumberPortion;
class SwErgoSumPortion;
class SwExpandPortion;
class SwMultiPortion;
class SwFootnotePortion;

class SwTextFormatter : public SwTextPainter
{
    const SwFormatDrop *m_pDropFormat;
    SwMultiPortion* m_pMulti; // during formatting a multi-portion
    sal_uInt8 m_nContentEndHyph;  // Counts consecutive hyphens at the line end
    sal_uInt8 m_nContentMidHyph;  // Counts consecutive hyphens before flies
    TextFrameIndex m_nLeftScanIdx; // for increasing performance during
    TextFrameIndex m_nRightScanIdx; // scanning for portion ends
    bool m_bOnceMore : 1; // Another round?
    bool m_bFlyInContentBase : 1; // Base reference that sets a character-bound frame
    bool m_bTruncLines : 1; // Flag for extending the repaint rect, if needed
    bool m_bUnclipped : 1; // Flag whether repaint is larger than the fixed line height
    std::unique_ptr<sw::MergedAttrIterByEnd> m_pByEndIter; // HACK for TryNewNoLengthPortion
    SwLinePortion* m_pFirstOfBorderMerge; // The first text portion of a joined border (during portion building)

    SwLinePortion *NewPortion( SwTextFormatInfo &rInf );
    SwTextPortion  *NewTextPortion( SwTextFormatInfo &rInf );
    SwLinePortion *NewExtraPortion( SwTextFormatInfo &rInf );
    SwTabPortion *NewTabPortion( SwTextFormatInfo &rInf, bool bAuto ) const;
    SwNumberPortion *NewNumberPortion( SwTextFormatInfo &rInf ) const;
    SwDropPortion *NewDropPortion( SwTextFormatInfo &rInf );
    SwNumberPortion *NewFootnoteNumPortion( SwTextFormatInfo const &rInf ) const;
    SwErgoSumPortion *NewErgoSumPortion( SwTextFormatInfo const &rInf ) const;
    SwExpandPortion *NewFieldPortion( SwTextFormatInfo &rInf,
                                    const SwTextAttr *pHt ) const;
    SwFootnotePortion *NewFootnotePortion( SwTextFormatInfo &rInf, SwTextAttr *pHt );

    SwFlyCntPortion *NewFlyCntPortion( SwTextFormatInfo &rInf,
                                       SwTextAttr *pHt ) const;
    SwLinePortion *WhichFirstPortion( SwTextFormatInfo &rInf );
    SwTextPortion *WhichTextPor( SwTextFormatInfo &rInf ) const;
    SwExpandPortion * TryNewNoLengthPortion( SwTextFormatInfo const & rInfo );

    // The center piece of formatting
    void BuildPortions( SwTextFormatInfo &rInf );

    bool BuildMultiPortion( SwTextFormatInfo &rInf, SwMultiPortion& rMulti );

    void CalcFlyWidth( SwTextFormatInfo &rInf );

    // Is overloaded by SwTextFormatter because of UpdatePos
    void CalcAdjustLine( SwLineLayout *pCurr );

    // considers line spacing attributes
    void CalcRealHeight( bool bNewLine = false );

    // Transfers the data to rInf
    void FeedInf( SwTextFormatInfo &rInf ) const;

    // Treats underflow situations
    SwLinePortion *Underflow( SwTextFormatInfo &rInf );

    // Calculates the ascent and the height from the fontmetric
    void CalcAscent( SwTextFormatInfo &rInf, SwLinePortion *pPor );

    // determines, if an optimized repaint rectangle is allowed
    bool AllowRepaintOpt() const;

    // Is called by FormatLine
    void FormatReset( SwTextFormatInfo &rInf );

    void UpdatePos(SwLineLayout *pCurr, Point aStart, TextFrameIndex nStartIdx,
            bool bAlways = false ) const;

    void AlignFlyInCntBase( tools::Long nBaseLine ) const;

    bool ChkFlyUnderflow( SwTextFormatInfo &rInf ) const;

    // Insert portion
    void InsertPortion( SwTextFormatInfo &rInf, SwLinePortion *pPor );

    // Guess height for the DropPortion
    void GuessDropHeight( const sal_uInt16 nLines );

public:
    // Calculate the height for the DropPortion
    void CalcDropHeight( const sal_uInt16 nLines );

    // Calculates the paragraphs bottom, takes anchored objects within it into
    // account which have a wrap setting of "wrap at 1st paragraph"
    SwTwips CalcBottomLine() const;

    // Takes character-bound objects into account when calculating the
    // repaint rect in lines with fixed line height
    void CalcUnclipped( SwTwips& rTop, SwTwips& rBottom );

    // Amongst others for DropCaps
    bool CalcOnceMore();

    void CtorInitTextFormatter( SwTextFrame *pFrame, SwTextFormatInfo *pInf );
    SwTextFormatter(SwTextFrame *pTextFrame, SwTextFormatInfo *pTextFormatInf)
        : SwTextPainter(pTextFrame->GetTextNodeFirst())
        , m_bUnclipped(false)
    {
        CtorInitTextFormatter( pTextFrame, pTextFormatInf );
    }
    virtual ~SwTextFormatter() override;

    TextFrameIndex FormatLine(TextFrameIndex nStart);

    void RecalcRealHeight();

    // We format a line for interactive hyphenation
    bool Hyphenate(SwInterHyphInfoTextFrame & rInf);

    // A special method for QuoVadis texts:
    // nErgo is the page number of the ErgoSum Footnote
    // At 0 it's still unclear
    TextFrameIndex FormatQuoVadis(TextFrameIndex nStart);

    // The emergency break: Cancel formatting, discard line
    bool IsStop() const { return GetInfo().IsStop(); }

    // The counterpart: Continue formatting at all costs
    bool IsNewLine() const { return GetInfo().IsNewLine(); }

    // FormatQuick(); Refresh formatting information
    bool IsQuick() const { return GetInfo().IsQuick(); }

    // Create a SwLineLayout if needed, which avoids Footnote/Fly to oscillate
    void MakeDummyLine();

    // SwTextIter functionality
    void Insert( SwLineLayout *pLine );

    // The remaining height to the page border
    sal_uInt16 GetFrameRstHeight() const;

    // How wide would you be without any bounds (Flys etc.)?
    SwTwips CalcFitToContent_( );

    SwLinePortion* MakeRestPortion(const SwLineLayout* pLine, TextFrameIndex nPos);

    const SwFormatDrop *GetDropFormat() const { return m_pDropFormat; }
    void ClearDropFormat() { m_pDropFormat = nullptr; }

    SwMultiPortion *GetMulti() const { return m_pMulti; }

    bool IsOnceMore() const { return m_bOnceMore; }
    void SetOnceMore( bool bNew ) { m_bOnceMore = bNew; }

    bool HasTruncLines() const { return m_bTruncLines; }
    void SetTruncLines( bool bNew ) { m_bTruncLines = bNew; }

    bool IsUnclipped() const { return m_bUnclipped; }
    void SetUnclipped( bool bNew ) { m_bUnclipped = bNew; }

    bool IsFlyInCntBase() const { return m_bFlyInContentBase; }
    void SetFlyInCntBase( bool bNew = true ) { m_bFlyInContentBase = bNew; }

    SwTextFormatInfo &GetInfo()
        { return static_cast<SwTextFormatInfo&>(SwTextIter::GetInfo()); }
    const SwTextFormatInfo &GetInfo() const
        { return static_cast<const SwTextFormatInfo&>(SwTextIter::GetInfo()); }

    void InitCntHyph() { CntHyphens( m_nContentEndHyph, m_nContentMidHyph ); }
    const sal_uInt8 &CntEndHyph() const { return m_nContentEndHyph; }
    const sal_uInt8 &CntMidHyph() const { return m_nContentMidHyph; }
    sal_uInt8 &CntEndHyph() { return m_nContentEndHyph; }
    sal_uInt8 &CntMidHyph() { return m_nContentMidHyph; }

    static void MergeCharacterBorder( SwDropPortion const & rPortion );

    void MergeCharacterBorder( SwLinePortion& rPortion, SwLinePortion const *pPrev, SwTextFormatInfo& rInf );
};

#endif

/* vim:set shiftwidth=4 softtabstop=4 expandtab: */