office-gobmx/i18npool/source/breakiterator/breakiterator_ctl.cxx

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 * Copyright 2008 by Sun Microsystems, Inc.
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 * $RCSfile: breakiterator_ctl.cxx,v $
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// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_i18npool.hxx"

#include <com/sun/star/i18n/CharacterIteratorMode.hpp>
#include <breakiterator_ctl.hxx>

#include <string.h> // for memset

using namespace ::com::sun::star::uno;
using namespace ::com::sun::star::lang;
using namespace ::rtl;

namespace com { namespace sun { namespace star { namespace i18n {

/**
 * Constructor.
 */
BreakIterator_CTL::BreakIterator_CTL()
{
    cBreakIterator = "com.sun.star.i18n.BreakIterator_CTL";
    // to improve performance, alloc big enough memory in construct.
    cellIndexSize = 512;
    nextCellIndex = (sal_Int32*) calloc(cellIndexSize, sizeof(sal_Int32));
    previousCellIndex = (sal_Int32*) calloc(cellIndexSize, sizeof(sal_Int32));
    memset(nextCellIndex, 0, cellIndexSize * sizeof(sal_Int32));
}

/**
 * Deconstructor.
 */
BreakIterator_CTL::~BreakIterator_CTL()
{
    free(nextCellIndex);
    free(previousCellIndex);
}

sal_Int32 SAL_CALL BreakIterator_CTL::previousCharacters( const OUString& Text,
    sal_Int32 nStartPos, const lang::Locale& rLocale,
    sal_Int16 nCharacterIteratorMode, sal_Int32 nCount, sal_Int32& nDone )
    throw(RuntimeException)
{
    if (nCharacterIteratorMode == CharacterIteratorMode::SKIPCELL ) {
        nDone = 0;
        if (nStartPos > 0) {    // for others to skip cell.
        makeIndex(Text, nStartPos);

        if (nextCellIndex[nStartPos-1] == 0) // not a CTL character
            return BreakIterator_Unicode::previousCharacters(Text, nStartPos, rLocale,
                nCharacterIteratorMode, nCount, nDone);
        else while (nCount > 0 && nextCellIndex[nStartPos - 1] > 0) {
            nCount--; nDone++;
            nStartPos = previousCellIndex[nStartPos - 1];
        }
        } else
        nStartPos = 0;
    } else { // for BS to delete one char.
        nDone = (nStartPos > nCount) ? nCount : nStartPos;
        nStartPos -= nDone;
    }

    return nStartPos;
}

sal_Int32 SAL_CALL BreakIterator_CTL::nextCharacters(const OUString& Text,
    sal_Int32 nStartPos, const lang::Locale& rLocale,
    sal_Int16 nCharacterIteratorMode, sal_Int32 nCount, sal_Int32& nDone)
    throw(RuntimeException)
{
    sal_Int32 len = Text.getLength();
    if (nCharacterIteratorMode == CharacterIteratorMode::SKIPCELL ) {
        nDone = 0;
        if (nStartPos < len) {
        makeIndex(Text, nStartPos);

        if (nextCellIndex[nStartPos] == 0) // not a CTL character
            return BreakIterator_Unicode::nextCharacters(Text, nStartPos, rLocale,
                nCharacterIteratorMode, nCount, nDone);
        else while (nCount > 0 && nextCellIndex[nStartPos] > 0) {
            nCount--; nDone++;
            nStartPos = nextCellIndex[nStartPos];
        }
        } else
        nStartPos = len;
    } else {
        nDone = (len - nStartPos > nCount) ? nCount : len - nStartPos;
        nStartPos += nDone;
    }

    return nStartPos;
}

// This method should be overwritten by derived language specific class.
void SAL_CALL BreakIterator_CTL::makeIndex(const OUString& /*text*/, sal_Int32 /*pos*/)
    throw(RuntimeException)
{
    throw RuntimeException();
}

// Make sure line is broken on cell boundary if we implement cell iterator.
LineBreakResults SAL_CALL BreakIterator_CTL::getLineBreak(
    const OUString& Text, sal_Int32 nStartPos,
    const lang::Locale& rLocale, sal_Int32 nMinBreakPos,
    const LineBreakHyphenationOptions& hOptions,
    const LineBreakUserOptions& bOptions ) throw(RuntimeException)
{
    LineBreakResults lbr = BreakIterator_Unicode::getLineBreak(Text, nStartPos,
                    rLocale, nMinBreakPos, hOptions, bOptions );
    if (lbr.breakIndex < Text.getLength()) {
        makeIndex(Text, lbr.breakIndex);
        lbr.breakIndex = previousCellIndex[ lbr.breakIndex ];
    }
    return lbr;
}

} } } }