source: trunk/src/kernel/qurlinfo.cpp@ 94

/****************************************************************************
** $Id: qurlinfo.cpp 2 2005-11-16 15:49:26Z dmik $
**
** Implementation of QUrlInfo class
**
** Created : 950429
**
** Copyright (C) 1992-2002 Trolltech AS.  All rights reserved.
**
** This file is part of the kernel module of the Qt GUI Toolkit.
**
** This file may be distributed under the terms of the Q Public License
** as defined by Trolltech AS of Norway and appearing in the file
** LICENSE.QPL included in the packaging of this file.
**
** This file may be distributed and/or modified under the terms of the
** GNU General Public License version 2 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.
**
** Licensees holding valid Qt Enterprise Edition or Qt Professional Edition
** licenses may use this file in accordance with the Qt Commercial License
** Agreement provided with the Software.
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
** See http://www.trolltech.com/pricing.html or email sales@trolltech.com for
**   information about Qt Commercial License Agreements.
** See http://www.trolltech.com/qpl/ for QPL licensing information.
** See http://www.trolltech.com/gpl/ for GPL licensing information.
**
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** not clear to you.
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**********************************************************************/

#include "qurlinfo.h"

#ifndef QT_NO_NETWORKPROTOCOL

#include "qurloperator.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;
#if defined(QT_LARGEFILE_SUPPORT)
    QIODevice::Offset size;
#else
    uint size;
#endif
    QDateTime lastModified;
    QDateTime lastRead;
    bool isDir;
    bool isFile;
    bool isSymLink;
    bool isWritable;
    bool isReadable;
    bool isExecutable;
};


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

    \ingroup io
    \ingroup misc

    This class is just a container for storing information about URLs,
    which is why all information must be passed in the constructor.

    Unless you're reimplementing a network protocol you're unlikely to
    create QUrlInfo objects yourself, but you may receive QUrlInfo
    objects from functions, e.g. QUrlOperator::info().

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

/*!
    \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()
*/

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

/*!
    Constructs a QUrlInfo object with information about the file \a
    file in the \a path. It tries to find the information about the \a
    file in the QUrlOperator \a path.

    If the information is not found, this constructor creates an
    invalid QUrlInfo, i.e. isValid() returns FALSE. You should always
    check if the URL info is valid before relying on the return values
    of any getter functions.

    If \a file is empty, it defaults to the QUrlOperator \a path, i.e.
    to the directory.

    \sa isValid() QUrlOperator::info()
*/

QUrlInfo::QUrlInfo( const QUrlOperator &path, const QString &file )
{
    QString file_ = file;
    if ( file_.isEmpty() )
        file_ = ".";

    QUrlInfo inf = path.info( file_ );
    if ( inf.d ) {
        d = new QUrlInfoPrivate;
        *d = *inf.d;
    } else {
        d = 0;
    }
}

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

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.
*/

#if defined(QT_ABI_QT4)
QUrlInfo::QUrlInfo( const QString &name, int permissions, const QString &owner,
                    const QString &group, QIODevice::Offset size, const QDateTime &lastModified,
                    const QDateTime &lastRead, bool isDir, bool isFile, bool isSymLink,
                    bool isWritable, bool isReadable, bool isExecutable )
#else
QUrlInfo::QUrlInfo( const QString &name, int permissions, const QString &owner,
                    const QString &group, uint size, const QDateTime &lastModified,
                    const QDateTime &lastRead, bool isDir, bool isFile, bool isSymLink,
                    bool isWritable, bool isReadable, bool isExecutable )
#endif
{
    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.
*/

#if defined(QT_ABI_QT4)
QUrlInfo::QUrlInfo( const QUrl &url, int permissions, const QString &owner,
                    const QString &group, QIODevice::Offset size, const QDateTime &lastModified,
                    const QDateTime &lastRead, bool isDir, bool isFile, bool isSymLink,
                    bool isWritable, bool isReadable, bool isExecutable )
#else
QUrlInfo::QUrlInfo( const QUrl &url, int permissions, const QString &owner,
                    const QString &group, uint size, const QDateTime &lastModified,
                    const QDateTime &lastRead, bool isDir, bool isFile, bool isSymLink,
                    bool isWritable, bool isReadable, bool isExecutable )
#endif
{
    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()
*/

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 \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()
*/

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()
*/

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()
*/

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()
*/

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()
*/

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()
*/

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()
*/

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()
*/

#if defined(QT_ABI_QT4)
void QUrlInfo::setSize( QIODevice::Offset size )
#else
void QUrlInfo::setSize( uint size )
#endif
{
    if ( !d )
        d = new QUrlInfoPrivate;
    d->size = size;
}


// ### reggie - what's the permission type? As in Unix?

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

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

    \sa isValid()
*/

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()
*/

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

/*!
    Destroys the URL info object.

    The QUrlOperator object to which this URL referred (if any) is not
    affected.
*/

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

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

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()
*/

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

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

    \sa isValid()
*/

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

/*!
    Returns the owner of the URL.

    \sa isValid()
*/

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

/*!
    Returns the group of the URL.

    \sa isValid()
*/

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

/*!
    Returns the size of the URL.

    \sa isValid()
*/

#if defined(QT_ABI_QT4)
QIODevice::Offset QUrlInfo::size() const
#else
uint QUrlInfo::size() const
#endif
{
    if ( !d )
        return 0;
#if defined(QT_LARGEFILE_SUPPORT) && !defined(QT_ABI_QT4)
    return d->size > UINT_MAX ? UINT_MAX : (uint)d->size;
#else
    return d->size;
#endif
}

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

    \sa isValid()
*/

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

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

    \sa isValid()
*/

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

/*!
    Returns TRUE if the URL is a directory; otherwise returns FALSE.

    \sa isValid()
*/

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

/*!
    Returns TRUE if the URL is a file; otherwise returns FALSE.

    \sa isValid()
*/

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()
*/

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

/*!
    Returns TRUE if the URL is writable; otherwise returns FALSE.

    \sa isValid()
*/

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

/*!
    Returns TRUE if the URL is readable; otherwise returns FALSE.

    \sa isValid()
*/

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

/*!
    Returns TRUE if the URL is executable; otherwise returns FALSE.

    \sa isValid()
*/

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.
*/

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.
*/

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.
*/

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;
    }
}

/*!
    Compares this QUrlInfo with \a i and returns TRUE if they are
    equal; otherwise returns FALSE.
*/

bool QUrlInfo::operator==( const QUrlInfo &i ) const
{
    if ( !d )
        return i.d == 0;
    if ( !i.d )
        return FALSE;

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

/*!
    Returns TRUE if the URL info is valid; otherwise returns FALSE.
    Valid means that the QUrlInfo contains real information. For
    example, a call to QUrlOperator::info() might return a an invalid
    QUrlInfo, if no information about the requested entry is
    available.

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

#endif // QT_NO_NETWORKPROTOCOL