source: trunk/src/gui/text/qtextdocumentfragment.cpp@ 698

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#include "qtextdocumentfragment.h"
#include "qtextdocumentfragment_p.h"
#include "qtextcursor_p.h"
#include "qtextlist.h"
#include "private/qunicodetables_p.h"

#include <qdebug.h>
#include <qtextcodec.h>
#include <qbytearray.h>
#include <qdatastream.h>
#include <qdatetime.h>

QT_BEGIN_NAMESPACE

QTextCopyHelper::QTextCopyHelper(const QTextCursor &_source, const QTextCursor &_destination, bool forceCharFormat, const QTextCharFormat &fmt)
#if defined(Q_CC_DIAB) // compiler bug
    : formatCollection(*_destination.d->priv->formatCollection()), originalText((const QString)_source.d->priv->buffer())
#else
    : formatCollection(*_destination.d->priv->formatCollection()), originalText(_source.d->priv->buffer())
#endif
{
    src = _source.d->priv;
    dst = _destination.d->priv;
    insertPos = _destination.position();
    this->forceCharFormat = forceCharFormat;
    primaryCharFormatIndex = convertFormatIndex(fmt);
    cursor = _source;
}

int QTextCopyHelper::convertFormatIndex(const QTextFormat &oldFormat, int objectIndexToSet)
{
    QTextFormat fmt = oldFormat;
    if (objectIndexToSet != -1) {
        fmt.setObjectIndex(objectIndexToSet);
    } else if (fmt.objectIndex() != -1) {
        int newObjectIndex = objectIndexMap.value(fmt.objectIndex(), -1);
        if (newObjectIndex == -1) {
            QTextFormat objFormat = src->formatCollection()->objectFormat(fmt.objectIndex());
            Q_ASSERT(objFormat.objectIndex() == -1);
            newObjectIndex = formatCollection.createObjectIndex(objFormat);
            objectIndexMap.insert(fmt.objectIndex(), newObjectIndex);
        }
        fmt.setObjectIndex(newObjectIndex);
    }
    int idx = formatCollection.indexForFormat(fmt);
    Q_ASSERT(formatCollection.format(idx).type() == oldFormat.type());
    return idx;
}

int QTextCopyHelper::appendFragment(int pos, int endPos, int objectIndex)
{
    QTextDocumentPrivate::FragmentIterator fragIt = src->find(pos);
    const QTextFragmentData * const frag = fragIt.value();

    Q_ASSERT(objectIndex == -1
             || (frag->size_array[0] == 1 && src->formatCollection()->format(frag->format).objectIndex() != -1));

    int charFormatIndex;
    if (forceCharFormat)
       charFormatIndex = primaryCharFormatIndex;
    else
       charFormatIndex = convertFormatIndex(frag->format, objectIndex);

    const int inFragmentOffset = qMax(0, pos - fragIt.position());
    int charsToCopy = qMin(int(frag->size_array[0] - inFragmentOffset), endPos - pos);

    QTextBlock nextBlock = src->blocksFind(pos + 1);

    int blockIdx = -2;
    if (nextBlock.position() == pos + 1) {
        blockIdx = convertFormatIndex(nextBlock.blockFormat());
    } else if (pos == 0 && insertPos == 0) {
        dst->setBlockFormat(dst->blocksBegin(), dst->blocksBegin(), convertFormat(src->blocksBegin().blockFormat()).toBlockFormat());
        dst->setCharFormat(-1, 1, convertFormat(src->blocksBegin().charFormat()).toCharFormat());
    }

    QString txtToInsert(originalText.constData() + frag->stringPosition + inFragmentOffset, charsToCopy);
    if (txtToInsert.length() == 1
        && (txtToInsert.at(0) == QChar::ParagraphSeparator
            || txtToInsert.at(0) == QTextBeginningOfFrame
            || txtToInsert.at(0) == QTextEndOfFrame
           )
       ) {
        dst->insertBlock(txtToInsert.at(0), insertPos, blockIdx, charFormatIndex);
        ++insertPos;
    } else {
        if (nextBlock.textList()) {
            QTextBlock dstBlock = dst->blocksFind(insertPos);
            if (!dstBlock.textList()) {
                // insert a new text block with the block and char format from the
                // source block to make sure that the following text fragments
                // end up in a list as they should
                int listBlockFormatIndex = convertFormatIndex(nextBlock.blockFormat());
                int listCharFormatIndex = convertFormatIndex(nextBlock.charFormat());
                dst->insertBlock(insertPos, listBlockFormatIndex, listCharFormatIndex);
                ++insertPos;
            }
        }
        dst->insert(insertPos, txtToInsert, charFormatIndex);
        const int userState = nextBlock.userState();
        if (userState != -1)
            dst->blocksFind(insertPos).setUserState(userState);
        insertPos += txtToInsert.length();
    }

    return charsToCopy;