qvalidator.cpp

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#include <qdebug.h>

#include "qvalidator.h"
#ifndef QT_NO_VALIDATOR
#include "private/qobject_p.h"
#include "private/qlocale_p.h"

#include <limits.h>
#include <math.h>

QT_BEGIN_NAMESPACE

class QValidatorPrivate : public QObjectPrivate{
    Q_DECLARE_PUBLIC(QValidator)
public:
    QValidatorPrivate() : QObjectPrivate()
    {
    }

    QLocale locale;
};


QValidator::QValidator(QObject * parent)
    : QObject(*new QValidatorPrivate, parent)
{
}

#ifdef QT3_SUPPORT

QValidator::QValidator(QObject * parent, const char *name)
    : QObject(*new QValidatorPrivate, parent)
{
    setObjectName(QString::fromAscii(name));
}
#endif

QValidator::~QValidator()
{
}

QLocale QValidator::locale() const
{
    Q_D(const QValidator);
    return d->locale;
}

void QValidator::setLocale(const QLocale &locale)
{
    Q_D(QValidator);
    d->locale = locale;
}

void QValidator::fixup(QString &) const
{
}


QIntValidator::QIntValidator(QObject * parent)
    : QValidator(parent)
{
    b = INT_MIN;
    t = INT_MAX;
}


QIntValidator::QIntValidator(int minimum, int maximum,
                              QObject * parent)
    : QValidator(parent)
{
    b = minimum;
    t = maximum;
}


#ifdef QT3_SUPPORT

QIntValidator::QIntValidator(QObject * parent, const char *name)
    : QValidator(parent)
{
    setObjectName(QString::fromAscii(name));
    b = INT_MIN;
    t = INT_MAX;
}


QIntValidator::QIntValidator(int minimum, int maximum,
                              QObject * parent, const char* name)
    : QValidator(parent)
{
    setObjectName(QString::fromAscii(name));
    b = minimum;
    t = maximum;
}
#endif

QIntValidator::~QIntValidator()
{
    // nothing
}


static int numDigits(qlonglong n)
{
    if (n == 0)
        return 1;
    return (int)log10(double(n)) + 1;
}

static qlonglong pow10(int exp)
{
    qlonglong result = 1;
    for (int i = 0; i < exp; ++i)
        result *= 10;
    return result;
}

QValidator::State QIntValidator::validate(QString & input, int&) const
{
    QByteArray buff;
    if (!locale().d()->validateChars(input, QLocalePrivate::IntegerMode, &buff)) {
        QLocale cl(QLocale::C);
        if (!cl.d()->validateChars(input, QLocalePrivate::IntegerMode, &buff))
            return Invalid;
    }

    if (buff.isEmpty())
        return Intermediate;

    if (b >= 0 && buff.startsWith('-'))
        return Invalid;

    if (t < 0 && buff.startsWith('+'))
        return Invalid;

    if (buff.size() == 1 && (buff.at(0) == '+' || buff.at(0) == '-'))
        return Intermediate;

    bool ok, overflow;
    qlonglong entered = QLocalePrivate::bytearrayToLongLong(buff.constData(), 10, &ok, &overflow);
    if (overflow || !ok)
        return Invalid;

    if (entered >= b && entered <= t) {
        locale().toInt(input, &ok, 10);
        return ok ? Acceptable : Intermediate;
    }

    if (entered >= 0) {
        // the -entered < b condition is necessary to allow people to type
        // the minus last (e.g. for right-to-left languages)
        return (entered > t && -entered < b) ? Invalid : Intermediate;
    } else {
        return (entered < b) ? Invalid : Intermediate;
    }
}

void QIntValidator::fixup(QString &input) const
{
    QByteArray buff;
    if (!locale().d()->validateChars(input, QLocalePrivate::IntegerMode, &buff)) {
        QLocale cl(QLocale::C);
        if (!cl.d()->validateChars(input, QLocalePrivate::IntegerMode, &buff))
            return;
    }
    bool ok, overflow;
    qlonglong entered = QLocalePrivate::bytearrayToLongLong(buff.constData(), 10, &ok, &overflow);
    if (ok && !overflow)
        input = locale().toString(entered);
}

void QIntValidator::setRange(int bottom, int top)
{
    b = bottom;
    t = top;
}


void QIntValidator::setBottom(int bottom)
{
    setRange(bottom, top());
}

void QIntValidator::setTop(int top)
{
    setRange(bottom(), top);
}


#ifndef QT_NO_REGEXP

QValidator::QValidator(QObjectPrivate &d, QObject *parent)
        : QObject(d, parent)
{
}

QValidator::QValidator(QValidatorPrivate &d, QObject *parent)
        : QObject(d, parent)
{
}

class QDoubleValidatorPrivate : public QValidatorPrivate
{
    Q_DECLARE_PUBLIC(QDoubleValidator)
public:
    QDoubleValidatorPrivate()
        : QValidatorPrivate()
        , notation(QDoubleValidator::ScientificNotation)
    {
    }

    QDoubleValidator::Notation notation;

    QValidator::State validateWithLocale(QString & input, QLocalePrivate::NumberMode numMode, const QLocale &locale) const;
};


QDoubleValidator::QDoubleValidator(QObject * parent)
    : QValidator(*new QDoubleValidatorPrivate , parent)
{
    b = -HUGE_VAL;
    t = HUGE_VAL;
    dec = 1000;
}


QDoubleValidator::QDoubleValidator(double bottom, double top, int decimals,
                                    QObject * parent)
    : QValidator(*new QDoubleValidatorPrivate , parent)
{
    b = bottom;
    t = top;
    dec = decimals;
}

#ifdef QT3_SUPPORT

QDoubleValidator::QDoubleValidator(QObject * parent, const char *name)
    : QValidator(*new QDoubleValidatorPrivate , parent)
{
    setObjectName(QString::fromAscii(name));
    b = -HUGE_VAL;
    t = HUGE_VAL;
    dec = 1000;
}


QDoubleValidator::QDoubleValidator(double bottom, double top, int decimals,
                                    QObject * parent, const char* name)
    : QValidator(*new QDoubleValidatorPrivate, parent)
{
    setObjectName(QString::fromAscii(name));
    b = bottom;
    t = top;
    dec = decimals;
}
#endif

QDoubleValidator::~QDoubleValidator()
{
}


#ifndef LLONG_MAX
#   define LLONG_MAX Q_INT64_C(0x7fffffffffffffff)
#endif

QValidator::State QDoubleValidator::validate(QString & input, int &) const
{
    Q_D(const QDoubleValidator);

    QLocalePrivate::NumberMode numMode = QLocalePrivate::DoubleStandardMode;
    switch (d->notation) {
        case StandardNotation:
            numMode = QLocalePrivate::DoubleStandardMode;
            break;
        case ScientificNotation:
            numMode = QLocalePrivate::DoubleScientificMode;
            break;
    }

    State currentLocaleValidation = d->validateWithLocale(input, numMode, locale());
    if (currentLocaleValidation == Acceptable || locale().language() == QLocale::C)
        return currentLocaleValidation;
    State cLocaleValidation = d->validateWithLocale(input, numMode, QLocale(QLocale::C));
    return qMax(currentLocaleValidation, cLocaleValidation);
}

QValidator::State QDoubleValidatorPrivate::validateWithLocale(QString &input, QLocalePrivate::NumberMode numMode, const QLocale &locale) const
{
    Q_Q(const QDoubleValidator);
    QByteArray buff;
    if (!locale.d()->validateChars(input, numMode, &buff, q->dec))
        return QValidator::Invalid;

    if (buff.isEmpty())
        return QValidator::Intermediate;

    if (q->b >= 0 && buff.startsWith('-'))
        return QValidator::Invalid;

    if (q->t < 0 && buff.startsWith('+'))
        return QValidator::Invalid;

    bool ok, overflow;
    double i = QLocalePrivate::bytearrayToDouble(buff.constData(), &ok, &overflow);
    if (overflow)
        return QValidator::Invalid;
    if (!ok)
        return QValidator::Intermediate;

    if (i >= q->b && i <= q->t)
        return QValidator::Acceptable;

    if (notation == QDoubleValidator::StandardNotation) {
        double max = qMax(qAbs(q->b), qAbs(q->t));
        if (max < LLONG_MAX) {
            qlonglong n = pow10(numDigits(qlonglong(max))) - 1;
            if (qAbs(i) > n)
                return QValidator::Invalid;
        }
    }

    return QValidator::Intermediate;
}


void QDoubleValidator::setRange(double minimum, double maximum, int decimals)
{
    b = minimum;
    t = maximum;
    dec = decimals;
}

void QDoubleValidator::setBottom(double bottom)
{
    setRange(bottom, top(), decimals());
}


void QDoubleValidator::setTop(double top)
{
    setRange(bottom(), top, decimals());
}

void QDoubleValidator::setDecimals(int decimals)
{
    setRange(bottom(), top(), decimals);
}

void QDoubleValidator::setNotation(Notation newNotation)
{
    Q_D(QDoubleValidator);
    d->notation = newNotation;
}

QDoubleValidator::Notation QDoubleValidator::notation() const
{
    Q_D(const QDoubleValidator);
    return d->notation;
}

QRegExpValidator::QRegExpValidator(QObject *parent)
    : QValidator(parent), r(QString::fromLatin1(".*"))
{
}

QRegExpValidator::QRegExpValidator(const QRegExp& rx, QObject *parent)
    : QValidator(parent), r(rx)
{
}

#ifdef QT3_SUPPORT

QRegExpValidator::QRegExpValidator(QObject *parent, const char *name)
    : QValidator(parent), r(QString::fromLatin1(".*"))
{
        setObjectName(QString::fromAscii(name));
}

QRegExpValidator::QRegExpValidator(const QRegExp& rx, QObject *parent,
                                    const char *name)
    : QValidator(parent), r(rx)
{
        setObjectName(QString::fromAscii(name));
}
#endif

QRegExpValidator::~QRegExpValidator()
{
}

QValidator::State QRegExpValidator::validate(QString &input, int& pos) const
{
    if (r.exactMatch(input)) {
        return Acceptable;
    } else {
        if (const_cast<QRegExp &>(r).matchedLength() == input.size()) {
            return Intermediate;
        } else {
            pos = input.size();
            return Invalid;
        }
    }
}

void QRegExpValidator::setRegExp(const QRegExp& rx)
{
    r = rx;
}

#endif

QT_END_NAMESPACE

#endif // QT_NO_VALIDATOR