qtextformat.cpp

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#include "qtextformat.h"
#include "qtextformat_p.h"

#include <qvariant.h>
#include <qdatastream.h>
#include <qdebug.h>
#include <qmap.h>
#include <qhash.h>

QT_BEGIN_NAMESPACE

QTextLength::operator QVariant() const
{
    return QVariant(QVariant::TextLength, this);
}

#ifndef QT_NO_DATASTREAM
QDataStream &operator<<(QDataStream &stream, const QTextLength &length)
{
    return stream << qint32(length.lengthType) << double(length.fixedValueOrPercentage);
}

QDataStream &operator>>(QDataStream &stream, QTextLength &length)
{
    qint32 type;
    double fixedValueOrPercentage;
    stream >> type >> fixedValueOrPercentage;
    length.fixedValueOrPercentage = fixedValueOrPercentage;
    length.lengthType = QTextLength::Type(type);
    return stream;
}
#endif // QT_NO_DATASTREAM

class QTextFormatPrivate : public QSharedData
{
public:
    QTextFormatPrivate() : hashDirty(true), fontDirty(true), hashValue(0) {}

    struct Property
    {
        inline Property(qint32 k, const QVariant &v) : key(k), value(v) {}
        inline Property() {}

        qint32 key;
        QVariant value;

        inline bool operator==(const Property &other) const
        { return key == other.key && value == other.value; }
        inline bool operator!=(const Property &other) const
        { return key != other.key || value != other.value; }
    };

    inline uint hash() const
    {
        if (!hashDirty)
            return hashValue;
        return recalcHash();
    }

    inline bool operator==(const QTextFormatPrivate &rhs) const {
        if (hash() != rhs.hash())
            return false;

        return props == rhs.props;
    }

    inline void insertProperty(qint32 key, const QVariant &value)
    {
        hashDirty = true;
        if (key >= QTextFormat::FirstFontProperty && key <= QTextFormat::LastFontProperty)
            fontDirty = true;
        for (int i = 0; i < props.count(); ++i)
            if (props.at(i).key == key) {
                props[i].value = value;
                return;
            }
        props.append(Property(key, value));
    }

    inline void clearProperty(qint32 key)
    {
        for (int i = 0; i < props.count(); ++i)
            if (props.at(i).key == key) {
                hashDirty = true;
                if (key >= QTextFormat::FirstFontProperty && key <= QTextFormat::LastFontProperty)
                    fontDirty = true;
                props.remove(i);
                return;
            }
    }

    inline int propertyIndex(qint32 key) const
    {
        for (int i = 0; i < props.count(); ++i)
            if (props.at(i).key == key)
                return i;
        return -1;
    }

    inline QVariant property(qint32 key) const
    {
        const int idx = propertyIndex(key);
        if (idx < 0)
            return QVariant();
        return props.at(idx).value;
    }

    inline bool hasProperty(qint32 key) const
    { return propertyIndex(key) != -1; }

    void resolveFont(const QFont &defaultFont);

    inline const QFont &font() const {
        if (fontDirty)
            recalcFont();
        return fnt;
    }

    QVector<Property> props;
private:

    uint recalcHash() const;
    void recalcFont() const;

    mutable bool hashDirty;
    mutable bool fontDirty;
    mutable uint hashValue;
    mutable QFont fnt;

    friend QDataStream &operator<<(QDataStream &, const QTextFormat &);
    friend QDataStream &operator>>(QDataStream &, QTextFormat &);
};

// this is only safe because sizeof(int) == sizeof(float)
static inline uint hash(float d)
{
#ifdef Q_CC_GNU
    // this is a GCC extension and isn't guaranteed to work in other compilers
    // the reinterpret_cast below generates a strict-aliasing warning with GCC
    union { float f; uint u; } cvt;
    cvt.f = d;
    return cvt.u;
#else
    return reinterpret_cast<uint&>(d);
#endif
}

static inline uint hash(const QColor &color)
{
    return (color.isValid()) ? color.rgba() : 0x234109;
}

static inline uint hash(const QPen &pen)
{
    return hash(pen.color()) + hash(pen.widthF());
}

static inline uint hash(const QBrush &brush)
{
    return hash(brush.color()) + (brush.style() << 3);
}

static inline uint variantHash(const QVariant &variant)
{
    // simple and fast hash functions to differentiate between type and value
    switch (variant.userType()) { // sorted by occurrence frequency
    case QVariant::String: return qHash(variant.toString());
    case QVariant::Double: return hash(variant.toDouble());
    case QVariant::Int: return 0x811890 + variant.toInt();
    case QVariant::Brush:
        return 0x01010101 + hash(qvariant_cast<QBrush>(variant));
    case QVariant::Bool: return 0x371818 + variant.toBool();
    case QVariant::Pen: return 0x02020202 + hash(qvariant_cast<QPen>(variant));
    case QVariant::List:
        return 0x8377 + qvariant_cast<QVariantList>(variant).count();
    case QVariant::Color: return hash(qvariant_cast<QColor>(variant));
      case QVariant::TextLength:
        return 0x377 + hash(qvariant_cast<QTextLength>(variant).rawValue());
    case QMetaType::Float: return hash(variant.toFloat());
    case QVariant::Invalid: return 0;
    default: break;
    }
    return qHash(variant.typeName());
}

static inline int getHash(const QTextFormatPrivate *d, int format)
{
    return (d ? d->hash() : 0) + format;
}

uint QTextFormatPrivate::recalcHash() const
{
    hashValue = 0;
    for (QVector<Property>::ConstIterator it = props.constBegin(); it != props.constEnd(); ++it)
        hashValue += (it->key << 16) + variantHash(it->value);

    hashDirty = false;

    return hashValue;
}

void QTextFormatPrivate::resolveFont(const QFont &defaultFont)
{
    recalcFont();
    const uint oldMask = fnt.resolve();
    fnt = fnt.resolve(defaultFont);

    if (hasProperty(QTextFormat::FontSizeAdjustment)) {
        const qreal scaleFactors[7] = {qreal(0.7), qreal(0.8), qreal(1.0), qreal(1.2), qreal(1.5), qreal(2), qreal(2.4)};

        const int htmlFontSize = qBound(0, property(QTextFormat::FontSizeAdjustment).toInt() + 3 - 1, 6);


        if (defaultFont.pointSize() <= 0) {
            qreal pixelSize = scaleFactors[htmlFontSize] * defaultFont.pixelSize();
            fnt.setPixelSize(qRound(pixelSize));
        } else {
            qreal pointSize = scaleFactors[htmlFontSize] * defaultFont.pointSizeF();
            fnt.setPointSizeF(pointSize);
        }
    }

    fnt.resolve(oldMask);
}

void QTextFormatPrivate::recalcFont() const
{
    // update cached font as well
    QFont f;

    for (int i = 0; i < props.count(); ++i) {
        switch (props.at(i).key) {
            case QTextFormat::FontFamily:
                f.setFamily(props.at(i).value.toString());
                break;
            case QTextFormat::FontPointSize:
                f.setPointSizeF(props.at(i).value.toReal());
                break;
            case  QTextFormat::FontPixelSize:
                f.setPixelSize(props.at(i).value.toInt());
                break;
            case QTextFormat::FontWeight: {
                int weight = props.at(i).value.toInt();
                if (weight == 0) weight = QFont::Normal;
                f.setWeight(weight);
                break; }
            case QTextFormat::FontItalic:
                f.setItalic(props.at(i).value.toBool());
                break;
            case QTextFormat::FontUnderline:
                if (! hasProperty(QTextFormat::TextUnderlineStyle)) // don't use the old one if the new one is there.
                    f.setUnderline(props.at(i).value.toBool());
                break;
            case QTextFormat::TextUnderlineStyle:
                f.setUnderline(static_cast<QTextCharFormat::UnderlineStyle>(props.at(i).value.toInt()) == QTextCharFormat::SingleUnderline);
                break;
            case QTextFormat::FontOverline:
                f.setOverline(props.at(i).value.toBool());
                break;
            case QTextFormat::FontStrikeOut:
                f.setStrikeOut(props.at(i).value.toBool());
                break;
            case QTextFormat::FontLetterSpacing:
                f.setLetterSpacing(QFont::PercentageSpacing, props.at(i).value.toReal());
                break;
            case QTextFormat::FontWordSpacing:
                f.setWordSpacing(props.at(i).value.toReal());
                break;
            case QTextFormat::FontCapitalization:
                f.setCapitalization(static_cast<QFont::Capitalization> (props.at(i).value.toInt()));
                break;
            case QTextFormat::FontFixedPitch: {
                const bool value = props.at(i).value.toBool();
                if (f.fixedPitch() != value)
                    f.setFixedPitch(value);
                break; }
            case QTextFormat::FontStyleHint:
                f.setStyleHint(static_cast<QFont::StyleHint>(props.at(i).value.toInt()), f.styleStrategy());
                break;
            case QTextFormat::FontHintingPreference:
                f.setHintingPreference(static_cast<QFont::HintingPreference>(props.at(i).value.toInt()));
                break;
            case QTextFormat::FontStyleStrategy:
                f.setStyleStrategy(static_cast<QFont::StyleStrategy>(props.at(i).value.toInt()));
                break;
            case QTextFormat::FontKerning:
                f.setKerning(props.at(i).value.toBool());
                break;
            default:
                break;
            }
    }
    fnt = f;
    fontDirty = false;
}

#ifndef QT_NO_DATASTREAM
Q_GUI_EXPORT QDataStream &operator<<(QDataStream &stream, const QTextFormat &fmt)
{
    stream << fmt.format_type << fmt.properties();
    return stream;
}

Q_GUI_EXPORT QDataStream &operator>>(QDataStream &stream, QTextFormat &fmt)
{
    QMap<qint32, QVariant> properties;
    stream >> fmt.format_type >> properties;

    // QTextFormat's default constructor doesn't allocate the private structure, so
    // we have to do this, in case fmt is a default constructed value.
    if(!fmt.d)
        fmt.d = new QTextFormatPrivate();

    for (QMap<qint32, QVariant>::ConstIterator it = properties.constBegin();
         it != properties.constEnd(); ++it)
        fmt.d->insertProperty(it.key(), it.value());

    return stream;
}
#endif // QT_NO_DATASTREAM

QTextFormat::QTextFormat()
    : format_type(InvalidFormat)
{
}

QTextFormat::QTextFormat(int type)
    : format_type(type)
{
}


QTextFormat::QTextFormat(const QTextFormat &rhs)
    : d(rhs.d), format_type(rhs.format_type)
{
}

QTextFormat &QTextFormat::operator=(const QTextFormat &rhs)
{
    d = rhs.d;
    format_type = rhs.format_type;
    return *this;
}

QTextFormat::~QTextFormat()
{
}


QTextFormat::operator QVariant() const
{
    return QVariant(QVariant::TextFormat, this);
}

void QTextFormat::merge(const QTextFormat &other)
{
    if (format_type != other.format_type)
        return;

    if (!d) {
        d = other.d;
        return;
    }

    if (!other.d)
        return;

    QTextFormatPrivate *d = this->d;

    const QVector<QTextFormatPrivate::Property> &otherProps = other.d->props;
    d->props.reserve(d->props.size() + otherProps.size());
    for (int i = 0; i < otherProps.count(); ++i) {
        const QTextFormatPrivate::Property &p = otherProps.at(i);
        d->insertProperty(p.key, p.value);
    }
}

int QTextFormat::type() const
{
    return format_type;
}

QTextBlockFormat QTextFormat::toBlockFormat() const
{
    return QTextBlockFormat(*this);
}

QTextCharFormat QTextFormat::toCharFormat() const
{
    return QTextCharFormat(*this);
}

QTextListFormat QTextFormat::toListFormat() const
{
    return QTextListFormat(*this);
}

QTextTableFormat QTextFormat::toTableFormat() const
{
    return QTextTableFormat(*this);
}

QTextFrameFormat QTextFormat::toFrameFormat() const
{
    return QTextFrameFormat(*this);
}

QTextImageFormat QTextFormat::toImageFormat() const
{
    return QTextImageFormat(*this);
}

QTextTableCellFormat QTextFormat::toTableCellFormat() const
{
    return QTextTableCellFormat(*this);
}

bool QTextFormat::boolProperty(int propertyId) const
{
    if (!d)
        return false;
    const QVariant prop = d->property(propertyId);
    if (prop.userType() != QVariant::Bool)
        return false;
    return prop.toBool();
}

int QTextFormat::intProperty(int propertyId) const
{
    // required, since the default layout direction has to be LayoutDirectionAuto, which is not integer 0
    int def = (propertyId == QTextFormat::LayoutDirection) ? int(Qt::LayoutDirectionAuto) : 0;

    if (!d)
        return def;
    const QVariant prop = d->property(propertyId);
    if (prop.userType() != QVariant::Int)
        return def;
    return prop.toInt();
}

qreal QTextFormat::doubleProperty(int propertyId) const
{
    if (!d)
        return 0.;
    const QVariant prop = d->property(propertyId);
    if (prop.userType() != QVariant::Double && prop.userType() != QMetaType::Float)
        return 0.;
    return qvariant_cast<qreal>(prop);
}

QString QTextFormat::stringProperty(int propertyId) const
{
    if (!d)
        return QString();
    const QVariant prop = d->property(propertyId);
    if (prop.userType() != QVariant::String)
        return QString();
    return prop.toString();
}

QColor QTextFormat::colorProperty(int propertyId) const
{
    if (!d)
        return QColor();
    const QVariant prop = d->property(propertyId);
    if (prop.userType() != QVariant::Color)
        return QColor();
    return qvariant_cast<QColor>(prop);
}

QPen QTextFormat::penProperty(int propertyId) const
{
    if (!d)
        return QPen(Qt::NoPen);
    const QVariant prop = d->property(propertyId);
    if (prop.userType() != QVariant::Pen)
        return QPen(Qt::NoPen);
    return qvariant_cast<QPen>(prop);
}

QBrush QTextFormat::brushProperty(int propertyId) const
{
    if (!d)
        return QBrush(Qt::NoBrush);
    const QVariant prop = d->property(propertyId);
    if (prop.userType() != QVariant::Brush)
        return QBrush(Qt::NoBrush);
    return qvariant_cast<QBrush>(prop);
}

QTextLength QTextFormat::lengthProperty(int propertyId) const
{
    if (!d)
        return QTextLength();
    return qvariant_cast<QTextLength>(d->property(propertyId));
}

QVector<QTextLength> QTextFormat::lengthVectorProperty(int propertyId) const
{
    QVector<QTextLength> vector;
    if (!d)
        return vector;
    const QVariant prop = d->property(propertyId);
    if (prop.userType() != QVariant::List)
        return vector;

    QList<QVariant> propertyList = prop.toList();
    for (int i=0; i<propertyList.size(); ++i) {
        QVariant var = propertyList.at(i);
        if (var.userType() == QVariant::TextLength)
            vector.append(qvariant_cast<QTextLength>(var));
    }

    return vector;
}

QVariant QTextFormat::property(int propertyId) const
{
    return d ? d->property(propertyId) : QVariant();
}

void QTextFormat::setProperty(int propertyId, const QVariant &value)
{
    if (!d)
        d = new QTextFormatPrivate;
    if (!value.isValid())
        clearProperty(propertyId);
    else
        d->insertProperty(propertyId, value);
}

void QTextFormat::setProperty(int propertyId, const QVector<QTextLength> &value)
{
    if (!d)
        d = new QTextFormatPrivate;
    QVariantList list;
    for (int i=0; i<value.size(); ++i)
        list << value.at(i);
    d->insertProperty(propertyId, list);
}

void QTextFormat::clearProperty(int propertyId)
{
    if (!d)
        return;
    d->clearProperty(propertyId);
}


int QTextFormat::objectIndex() const
{
    if (!d)
        return -1;
    const QVariant prop = d->property(ObjectIndex);
    if (prop.userType() != QVariant::Int) // ####
        return -1;
    return prop.toInt();
}

void QTextFormat::setObjectIndex(int o)
{
    if (o == -1) {
        if (d)
            d->clearProperty(ObjectIndex);
    } else {
        if (!d)
            d = new QTextFormatPrivate;
        // ### type
        d->insertProperty(ObjectIndex, o);
    }
}

bool QTextFormat::hasProperty(int propertyId) const
{
    return d ? d->hasProperty(propertyId) : false;
}

/*
    Returns the property type for the given \a propertyId.

    \sa hasProperty() allPropertyIds() Property
*/

QMap<int, QVariant> QTextFormat::properties() const
{
    QMap<int, QVariant> map;
    if (d) {
        for (int i = 0; i < d->props.count(); ++i)
            map.insert(d->props.at(i).key, d->props.at(i).value);
    }
    return map;
}

int QTextFormat::propertyCount() const
{
    return d ? d->props.count() : 0;
}

bool QTextFormat::operator==(const QTextFormat &rhs) const
{
    if (format_type != rhs.format_type)
        return false;

    if (d == rhs.d)
        return true;

    if (d && d->props.isEmpty() && !rhs.d)
        return true;

    if (!d && rhs.d && rhs.d->props.isEmpty())
        return true;

    if (!d || !rhs.d)
        return false;

    return *d == *rhs.d;
}

QTextCharFormat::QTextCharFormat() : QTextFormat(CharFormat) {}

QTextCharFormat::QTextCharFormat(const QTextFormat &fmt)
 : QTextFormat(fmt)
{
}

bool QTextCharFormat::fontUnderline() const
{
    if (hasProperty(TextUnderlineStyle))
        return underlineStyle() == SingleUnderline;
    return boolProperty(FontUnderline);
}

void QTextCharFormat::setUnderlineStyle(UnderlineStyle style)
{
    setProperty(TextUnderlineStyle, style);
    // for compatibility
    setProperty(FontUnderline, style == SingleUnderline);
}

QString QTextCharFormat::anchorName() const
{
    QVariant prop = property(AnchorName);
    if (prop.userType() == QVariant::StringList)
        return prop.toStringList().value(0);
    else if (prop.userType() != QVariant::String)
        return QString();
    return prop.toString();
}

QStringList QTextCharFormat::anchorNames() const
{
    QVariant prop = property(AnchorName);
    if (prop.userType() == QVariant::StringList)
        return prop.toStringList();
    else if (prop.userType() != QVariant::String)
        return QStringList();
    return QStringList(prop.toString());
}


void QTextCharFormat::setFont(const QFont &font)
{
    setFontFamily(font.family());

    const qreal pointSize = font.pointSizeF();
    if (pointSize > 0) {
        setFontPointSize(pointSize);
    } else {
        const int pixelSize = font.pixelSize();
        if (pixelSize > 0)
            setProperty(QTextFormat::FontPixelSize, pixelSize);
    }

    setFontWeight(font.weight());
    setFontItalic(font.italic());
    setUnderlineStyle(font.underline() ? SingleUnderline : NoUnderline);
    setFontOverline(font.overline());
    setFontStrikeOut(font.strikeOut());
    setFontFixedPitch(font.fixedPitch());
    setFontCapitalization(font.capitalization());
    setFontWordSpacing(font.wordSpacing());
    if (font.letterSpacingType() == QFont::PercentageSpacing)
        setFontLetterSpacing(font.letterSpacing());
    setFontStyleHint(font.styleHint());
    setFontStyleStrategy(font.styleStrategy());
    setFontKerning(font.kerning());
}

QFont QTextCharFormat::font() const
{
    return d ? d->font() : QFont();
}

QTextBlockFormat::QTextBlockFormat() : QTextFormat(BlockFormat) {}

QTextBlockFormat::QTextBlockFormat(const QTextFormat &fmt)
 : QTextFormat(fmt)
{
}

void QTextBlockFormat::setTabPositions(const QList<QTextOption::Tab> &tabs)
{
    QList<QVariant> list;
    QList<QTextOption::Tab>::ConstIterator iter = tabs.constBegin();
    while (iter != tabs.constEnd()) {
        QVariant v;
        v.setValue<QTextOption::Tab>(*iter);
        list.append(v);
        ++iter;
    }
    setProperty(TabPositions, list);
}

QList<QTextOption::Tab> QTextBlockFormat::tabPositions() const
{
    QVariant variant = property(TabPositions);
    if(variant.isNull())
        return QList<QTextOption::Tab>();
    QList<QTextOption::Tab> answer;
    QList<QVariant> variantsList = qvariant_cast<QList<QVariant> >(variant);
    QList<QVariant>::Iterator iter = variantsList.begin();
    while(iter != variantsList.end()) {
        answer.append( qvariant_cast<QTextOption::Tab>(*iter));
        ++iter;
    }
    return answer;
}

QTextListFormat::QTextListFormat()
    : QTextFormat(ListFormat)
{
    setIndent(1);
}

QTextListFormat::QTextListFormat(const QTextFormat &fmt)
 : QTextFormat(fmt)
{
}

QTextFrameFormat::QTextFrameFormat() : QTextFormat(FrameFormat)
{
    setBorderStyle(BorderStyle_Outset);
    setBorderBrush(Qt::darkGray);
}

QTextFrameFormat::QTextFrameFormat(const QTextFormat &fmt)
 : QTextFormat(fmt)
{
}

void QTextFrameFormat::setMargin(qreal amargin)
{
    setProperty(FrameMargin, amargin);
    setProperty(FrameTopMargin, amargin);
    setProperty(FrameBottomMargin, amargin);
    setProperty(FrameLeftMargin, amargin);
    setProperty(FrameRightMargin, amargin);
}


qreal QTextFrameFormat::topMargin() const
{
    if (!hasProperty(FrameTopMargin))
        return margin();
    return doubleProperty(FrameTopMargin);
}

qreal QTextFrameFormat::bottomMargin() const
{
    if (!hasProperty(FrameBottomMargin))
        return margin();
    return doubleProperty(FrameBottomMargin);
}

qreal QTextFrameFormat::leftMargin() const
{
    if (!hasProperty(FrameLeftMargin))
        return margin();
    return doubleProperty(FrameLeftMargin);
}

qreal QTextFrameFormat::rightMargin() const
{
    if (!hasProperty(FrameRightMargin))
        return margin();
    return doubleProperty(FrameRightMargin);
}

QTextTableFormat::QTextTableFormat()
 : QTextFrameFormat()
{
    setObjectType(TableObject);
    setCellSpacing(2);
    setBorder(1);
}

QTextTableFormat::QTextTableFormat(const QTextFormat &fmt)
 : QTextFrameFormat(fmt)
{
}

QTextImageFormat::QTextImageFormat() : QTextCharFormat() { setObjectType(ImageObject); }

QTextImageFormat::QTextImageFormat(const QTextFormat &fmt)
 : QTextCharFormat(fmt)
{
}

// ### Qt5 qreal replace with a QTextLength
// ### Qt5 qreal replace with a QTextLength
QTextTableCellFormat::QTextTableCellFormat()
    : QTextCharFormat()
{
    setObjectType(TableCellObject);
}

QTextTableCellFormat::QTextTableCellFormat(const QTextFormat &fmt)
    : QTextCharFormat(fmt)
{
}

// ------------------------------------------------------


QTextFormatCollection::QTextFormatCollection(const QTextFormatCollection &rhs)
{
    formats = rhs.formats;
    objFormats = rhs.objFormats;
}

QTextFormatCollection &QTextFormatCollection::operator=(const QTextFormatCollection &rhs)
{
    formats = rhs.formats;
    objFormats = rhs.objFormats;
    return *this;
}

QTextFormatCollection::~QTextFormatCollection()
{
}

int QTextFormatCollection::indexForFormat(const QTextFormat &format)
{
    uint hash = getHash(format.d, format.format_type);
    QMultiHash<uint, int>::const_iterator i = hashes.find(hash);
    while (i != hashes.end() && i.key() == hash) {
        if (formats.value(i.value()) == format) {
            return i.value();
        }
        ++i;
    }

    int idx = formats.size();
    formats.append(format);

    QT_TRY{
        QTextFormat &f = formats.last();
        if (!f.d)
            f.d = new QTextFormatPrivate;
        f.d->resolveFont(defaultFnt);

        if (!hashes.contains(hash, idx))
            hashes.insert(hash, idx);

    } QT_CATCH(...) {
        formats.pop_back();
        QT_RETHROW;
    }
    return idx;
}

bool QTextFormatCollection::hasFormatCached(const QTextFormat &format) const
{
    uint hash = getHash(format.d, format.format_type);
    QMultiHash<uint, int>::const_iterator i = hashes.find(hash);
    while (i != hashes.end() && i.key() == hash) {
        if (formats.value(i.value()) == format) {
            return true;
        }
        ++i;
    }
    return false;
}

QTextFormat QTextFormatCollection::objectFormat(int objectIndex) const
{
    if (objectIndex == -1)
        return QTextFormat();
    return format(objFormats.at(objectIndex));
}

void QTextFormatCollection::setObjectFormat(int objectIndex, const QTextFormat &f)
{
    const int formatIndex = indexForFormat(f);
    objFormats[objectIndex] = formatIndex;
}

int QTextFormatCollection::objectFormatIndex(int objectIndex) const
{
    if (objectIndex == -1)
        return -1;
    return objFormats.at(objectIndex);
}

void QTextFormatCollection::setObjectFormatIndex(int objectIndex, int formatIndex)
{
    objFormats[objectIndex] = formatIndex;
}

int QTextFormatCollection::createObjectIndex(const QTextFormat &f)
{
    const int objectIndex = objFormats.size();
    objFormats.append(indexForFormat(f));
    return objectIndex;
}

QTextFormat QTextFormatCollection::format(int idx) const
{
    if (idx < 0 || idx >= formats.count())
        return QTextFormat();

    return formats.at(idx);
}

void QTextFormatCollection::setDefaultFont(const QFont &f)
{
    defaultFnt = f;
    for (int i = 0; i < formats.count(); ++i)
        if (formats[i].d)
            formats[i].d->resolveFont(defaultFnt);
}

QT_END_NAMESPACE