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qurlinfo.cpp

/****************************************************************************
**
** Copyright (C) 1992-2007 Trolltech ASA. All rights reserved.
**
** This file is part of the QtNetwork module of the Qt Toolkit.
**
** This file may be used under the terms of the GNU General Public
** License version 2.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of
** this file.  Please review the following information to ensure GNU
** General Public Licensing requirements will be met:
** http://www.trolltech.com/products/qt/opensource.html
**
** If you are unsure which license is appropriate for your use, please
** review the following information:
** http://www.trolltech.com/products/qt/licensing.html or contact the
** sales department at sales@trolltech.com.
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
****************************************************************************/

#include "qurlinfo.h"

#ifndef QT_NO_URLINFO

#include "qurl.h"
#include "qdir.h"
#include <limits.h>

class QUrlInfoPrivate
{
public:
    QUrlInfoPrivate() :
        permissions(0),
        size(0),
        isDir(false),
        isFile(true),
        isSymLink(false),
        isWritable(true),
        isReadable(true),
        isExecutable(false)
    {}

    QString name;
    int permissions;
    QString owner;
    QString group;
    qint64 size;

    QDateTime lastModified;
    QDateTime lastRead;
    bool isDir;
    bool isFile;
    bool isSymLink;
    bool isWritable;
    bool isReadable;
    bool isExecutable;
};


/*!
    \class QUrlInfo
    \brief The QUrlInfo class stores information about URLs.

    \ingroup io
    \ingroup misc

    The information about a URL that can be retrieved includes name(),
    permissions(), owner(), group(), size(), lastModified(),
    lastRead(), isDir(), isFile(), isSymLink(), isWritable(),
    isReadable() and isExecutable().

    You can create your own QUrlInfo objects passing in all the
    relevant information in the constructor, and you can modify a
    QUrlInfo; for each getter mentioned above there is an equivalent
    setter. Note that setting values does not affect the underlying
    resource that the QUrlInfo provides information about; for example
    if you call setWritable(true) on a read-only resource the only
    thing changed is the QUrlInfo object, not the resource.

    \sa QUrl, {FTP Example}
*/

/*!
    \enum QUrlInfo::PermissionSpec

    This enum is used by the permissions() function to report the
    permissions of a file.

    \value ReadOwner The file is readable by the owner of the file.
    \value WriteOwner The file is writable by the owner of the file.
    \value ExeOwner The file is executable by the owner of the file.
    \value ReadGroup The file is readable by the group.
    \value WriteGroup The file is writable by the group.
    \value ExeGroup The file is executable by the group.
    \value ReadOther The file is readable by anyone.
    \value WriteOther The file is writable by anyone.
    \value ExeOther The file is executable by anyone.
*/

/*!
    Constructs an invalid QUrlInfo object with default values.

    \sa isValid()
*/

00109 QUrlInfo::QUrlInfo()
{
    d = 0;
}

/*!
    Copy constructor, copies \a ui to this URL info object.
*/

00118 QUrlInfo::QUrlInfo(const QUrlInfo &ui)
{
    if (ui.d) {
        d = new QUrlInfoPrivate;
        *d = *ui.d;
    } else {
        d = 0;
    }
}

/*!
    Constructs a QUrlInfo object by specifying all the URL's
    information.

    The information that is passed is the \a name, file \a
    permissions, \a owner and \a group and the file's \a size. Also
    passed is the \a lastModified date/time and the \a lastRead
    date/time. Flags are also passed, specifically, \a isDir, \a
    isFile, \a isSymLink, \a isWritable, \a isReadable and \a
    isExecutable.
*/

00140 QUrlInfo::QUrlInfo(const QString &name, int permissions, const QString &owner,
                    const QString &group, qint64 size, const QDateTime &lastModified,
                    const QDateTime &lastRead, bool isDir, bool isFile, bool isSymLink,
                    bool isWritable, bool isReadable, bool isExecutable)
{
    d = new QUrlInfoPrivate;
    d->name = name;
    d->permissions = permissions;
    d->owner = owner;
    d->group = group;
    d->size = size;
    d->lastModified = lastModified;
    d->lastRead = lastRead;
    d->isDir = isDir;
    d->isFile = isFile;
    d->isSymLink = isSymLink;
    d->isWritable = isWritable;
    d->isReadable = isReadable;
    d->isExecutable = isExecutable;
}


/*!
    Constructs a QUrlInfo object by specifying all the URL's
    information.

    The information that is passed is the \a url, file \a
    permissions, \a owner and \a group and the file's \a size. Also
    passed is the \a lastModified date/time and the \a lastRead
    date/time. Flags are also passed, specifically, \a isDir, \a
    isFile, \a isSymLink, \a isWritable, \a isReadable and \a
    isExecutable.
*/

00174 QUrlInfo::QUrlInfo(const QUrl &url, int permissions, const QString &owner,
                    const QString &group, qint64 size, const QDateTime &lastModified,
                    const QDateTime &lastRead, bool isDir, bool isFile, bool isSymLink,
                    bool isWritable, bool isReadable, bool isExecutable)
{
    d = new QUrlInfoPrivate;
    d->name = QFileInfo(url.path()).fileName();
    d->permissions = permissions;
    d->owner = owner;
    d->group = group;
    d->size = size;
    d->lastModified = lastModified;
    d->lastRead = lastRead;
    d->isDir = isDir;
    d->isFile = isFile;
    d->isSymLink = isSymLink;
    d->isWritable = isWritable;
    d->isReadable = isReadable;
    d->isExecutable = isExecutable;
}


/*!
    Sets the name of the URL to \a name. The name is the full text,
    for example, "http://doc.trolltech.com/qurlinfo.html".

    If you call this function for an invalid URL info, this function
    turns it into a valid one.

    \sa isValid()
*/

00206 void QUrlInfo::setName(const QString &name)
{
    if (!d)
        d = new QUrlInfoPrivate;
    d->name = name;
}


/*!
    If \a b is true then the URL is set to be a directory; if \a b is
    false then the URL is set not to be a directory (which normally
    means it is a file). (Note that a URL can refer to both a file and
    a directory even though most file systems do not support this.)

    If you call this function for an invalid URL info, this function
    turns it into a valid one.

    \sa isValid()
*/

00226 void QUrlInfo::setDir(bool b)
{
    if (!d)
        d = new QUrlInfoPrivate;
    d->isDir = b;
}


/*!
    If \a b is true then the URL is set to be a file; if \b is false
    then the URL is set not to be a file (which normally means it is a
    directory). (Note that a URL can refer to both a file and a
    directory even though most file systems do not support this.)

    If you call this function for an invalid URL info, this function
    turns it into a valid one.

    \sa isValid()
*/

00246 void QUrlInfo::setFile(bool b)
{
    if (!d)
        d = new QUrlInfoPrivate;
    d->isFile = b;
}


/*!
    Specifies that the URL refers to a symbolic link if \a b is true
    and that it does not if \a b is false.

    If you call this function for an invalid URL info, this function
    turns it into a valid one.

    \sa isValid()
*/

00264 void QUrlInfo::setSymLink(bool b)
{
    if (!d)
        d = new QUrlInfoPrivate;
    d->isSymLink = b;
}


/*!
    Specifies that the URL is writable if \a b is true and not
    writable if \a b is false.

    If you call this function for an invalid URL info, this function
    turns it into a valid one.

    \sa isValid()
*/

00282 void QUrlInfo::setWritable(bool b)
{
    if (!d)
        d = new QUrlInfoPrivate;
    d->isWritable = b;
}


/*!
    Specifies that the URL is readable if \a b is true and not
    readable if \a b is false.

    If you call this function for an invalid URL info, this function
    turns it into a valid one.

    \sa isValid()
*/

00300 void QUrlInfo::setReadable(bool b)
{
    if (!d)
        d = new QUrlInfoPrivate;
    d->isReadable = b;
}

/*!
    Specifies that the owner of the URL is called \a s.

    If you call this function for an invalid URL info, this function
    turns it into a valid one.

    \sa isValid()
*/

00316 void QUrlInfo::setOwner(const QString &s)
{
    if (!d)
        d = new QUrlInfoPrivate;
    d->owner = s;
}

/*!
    Specifies that the owning group of the URL is called \a s.

    If you call this function for an invalid URL info, this function
    turns it into a valid one.

    \sa isValid()
*/

00332 void QUrlInfo::setGroup(const QString &s)
{
    if (!d)
        d = new QUrlInfoPrivate;
    d->group = s;
}

/*!
    Specifies the \a size of the URL.

    If you call this function for an invalid URL info, this function
    turns it into a valid one.

    \sa isValid()
*/

00348 void QUrlInfo::setSize(qint64 size)
{
    if (!d)
        d = new QUrlInfoPrivate;
    d->size = size;
}

/*!
    Specifies that the URL has access permissions \a p.

    If you call this function for an invalid URL info, this function
    turns it into a valid one.

    \sa isValid()
*/

00364 void QUrlInfo::setPermissions(int p)
{
    if (!d)
        d = new QUrlInfoPrivate;
    d->permissions = p;
}

/*!
    Specifies that the object the URL refers to was last modified at
    \a dt.

    If you call this function for an invalid URL info, this function
    turns it into a valid one.

    \sa isValid()
*/

00381 void QUrlInfo::setLastModified(const QDateTime &dt)
{
    if (!d)
        d = new QUrlInfoPrivate;
    d->lastModified = dt;
}

/*!
    Destroys the URL info object.
*/

00392 QUrlInfo::~QUrlInfo()
{
    delete d;
}

/*!
    Assigns the values of \a ui to this QUrlInfo object.
*/

00401 QUrlInfo &QUrlInfo::operator=(const QUrlInfo &ui)
{
    if (ui.d) {
        if (!d)
            d= new QUrlInfoPrivate;
        *d = *ui.d;
    } else {
        delete d;
        d = 0;
    }
    return *this;
}

/*!
    Returns the file name of the URL.

    \sa isValid()
*/

00420 QString QUrlInfo::name() const
{
    if (!d)
        return QString();
    return d->name;
}

/*!
    Returns the permissions of the URL. You can use the \c PermissionSpec flags
    to test for certain permissions.

    \sa isValid()
*/

00434 int QUrlInfo::permissions() const
{
    if (!d)
        return 0;
    return d->permissions;
}

/*!
    Returns the owner of the URL.

    \sa isValid()
*/

00447 QString QUrlInfo::owner() const
{
    if (!d)
        return QString();
    return d->owner;
}

/*!
    Returns the group of the URL.

    \sa isValid()
*/

00460 QString QUrlInfo::group() const
{
    if (!d)
        return QString();
    return d->group;
}

/*!
    Returns the size of the URL.

    \sa isValid()
*/

00473 qint64 QUrlInfo::size() const
{
    if (!d)
        return 0;
    return d->size;
}

/*!
    Returns the last modification date of the URL.

    \sa isValid()
*/

00486 QDateTime QUrlInfo::lastModified() const
{
    if (!d)
        return QDateTime();
    return d->lastModified;
}

/*!
    Returns the date when the URL was last read.

    \sa isValid()
*/

00499 QDateTime QUrlInfo::lastRead() const
{
    if (!d)
        return QDateTime();
    return d->lastRead;
}

/*!
    Returns true if the URL is a directory; otherwise returns false.

    \sa isValid()
*/

00512 bool QUrlInfo::isDir() const
{
    if (!d)
        return false;
    return d->isDir;
}

/*!
    Returns true if the URL is a file; otherwise returns false.

    \sa isValid()
*/

00525 bool QUrlInfo::isFile() const
{
    if (!d)
        return false;
    return d->isFile;
}

/*!
    Returns true if the URL is a symbolic link; otherwise returns false.

    \sa isValid()
*/

00538 bool QUrlInfo::isSymLink() const
{
    if (!d)
        return false;
    return d->isSymLink;
}

/*!
    Returns true if the URL is writable; otherwise returns false.

    \sa isValid()
*/

00551 bool QUrlInfo::isWritable() const
{
    if (!d)
        return false;
    return d->isWritable;
}

/*!
    Returns true if the URL is readable; otherwise returns false.

    \sa isValid()
*/

00564 bool QUrlInfo::isReadable() const
{
    if (!d)
        return false;
    return d->isReadable;
}

/*!
    Returns true if the URL is executable; otherwise returns false.

    \sa isValid()
*/

00577 bool QUrlInfo::isExecutable() const
{
    if (!d)
        return false;
    return d->isExecutable;
}

/*!
    Returns true if \a i1 is greater than \a i2; otherwise returns
    false. The objects are compared by the value, which is specified
    by \a sortBy. This must be one of QDir::Name, QDir::Time or
    QDir::Size.
*/

00591 bool QUrlInfo::greaterThan(const QUrlInfo &i1, const QUrlInfo &i2,
                            int sortBy)
{
    switch (sortBy) {
    case QDir::Name:
        return i1.name() > i2.name();
    case QDir::Time:
        return i1.lastModified() > i2.lastModified();
    case QDir::Size:
        return i1.size() > i2.size();
    default:
        return false;
    }
}

/*!
    Returns true if \a i1 is less than \a i2; otherwise returns false.
    The objects are compared by the value, which is specified by \a
    sortBy. This must be one of QDir::Name, QDir::Time or QDir::Size.
*/

00612 bool QUrlInfo::lessThan(const QUrlInfo &i1, const QUrlInfo &i2,
                         int sortBy)
{
    return !greaterThan(i1, i2, sortBy);
}

/*!
    Returns true if \a i1 equals to \a i2; otherwise returns false.
    The objects are compared by the value, which is specified by \a
    sortBy. This must be one of QDir::Name, QDir::Time or QDir::Size.
*/

00624 bool QUrlInfo::equal(const QUrlInfo &i1, const QUrlInfo &i2,
                      int sortBy)
{
    switch (sortBy) {
    case QDir::Name:
        return i1.name() == i2.name();
    case QDir::Time:
        return i1.lastModified() == i2.lastModified();
    case QDir::Size:
        return i1.size() == i2.size();
    default:
        return false;
    }
}

/*!
    Returns true if this QUrlInfo is equal to \a other; otherwise
    returns false.

    \sa lessThan(), equal()
*/

00646 bool QUrlInfo::operator==(const QUrlInfo &other) const
{
    if (!d)
        return other.d == 0;
    if (!other.d)
        return false;

    return (d->name == other.d->name &&
            d->permissions == other.d->permissions &&
            d->owner == other.d->owner &&
            d->group == other.d->group &&
            d->size == other.d->size &&
            d->lastModified == other.d->lastModified &&
            d->lastRead == other.d->lastRead &&
            d->isDir == other.d->isDir &&
            d->isFile == other.d->isFile &&
            d->isSymLink == other.d->isSymLink &&
            d->isWritable == other.d->isWritable &&
            d->isReadable == other.d->isReadable &&
            d->isExecutable == other.d->isExecutable);
}

/*!
    \fn bool QUrlInfo::operator!=(const QUrlInfo &other) const
    \since 4.2

    Returns true if this QUrlInfo is not equal to \a other; otherwise
    returns false.

    \sa lessThan(), equal()
*/

/*!
    Returns true if the URL info is valid; otherwise returns false.
    Valid means that the QUrlInfo contains real information.

    You should always check if the URL info is valid before relying on
    the values.
*/
00685 bool QUrlInfo::isValid() const
{
    return d != 0;
}

#endif // QT_NO_URLINFO

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