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#include "qicon.h"

#include "qicon_p.h"

#include "qiconengine.h"

#include "qiconengineplugin.h"

#include "private/qfactoryloader_p.h"

#include "private/qiconloader_p.h"

#include "qapplication.h"

#include "qstyleoption.h"

#include "qpainter.h"

#include "qfileinfo.h"

#include "qstyle.h"

#include "qpixmapcache.h"

#include "qvariant.h"

#include "qcache.h"

#include "qdebug.h"

#include "private/qguiplatformplugin_p.h"

#ifdef Q_WS_MAC

#include <private/qt_mac_p.h>

#include <private/qt_cocoa_helpers_mac_p.h>

#endif

#ifdef Q_WS_X11

#include "private/qt_x11_p.h"

#include "private/qkde_p.h"

#endif

#ifndef QT_NO_ICON

QT_BEGIN_NAMESPACE

/*!

    \enum QIcon::Mode

    This enum type describes the mode for which a pixmap is intended

    to be used. The currently defined modes are:

    \value Normal

         Display the pixmap when the user is

        not interacting with the icon, but the

        functionality represented by the icon is available.

    \value Disabled

         Display the pixmap when the

        functionality represented by the icon is not available.

    \value Active

         Display the pixmap when the

        functionality represented by the icon is available and

        the user is interacting with the icon, for example, moving the

        mouse over it or clicking it.

   \value Selected

        Display the pixmap when the item represented by the icon is

        selected.

*/

/*!

  \enum QIcon::State

  This enum describes the state for which a pixmap is intended to be

  used. The \e state can be:

  \value Off  Display the pixmap when the widget is in an "off" state

  \value On  Display the pixmap when the widget is in an "on" state

*/

static QBasicAtomicInt serialNumCounter = Q_BASIC_ATOMIC_INITIALIZER(1);

static void qt_cleanup_icon_cache();

typedef QCache<QString, QIcon> IconCache;

Q_GLOBAL_STATIC_WITH_INITIALIZER(IconCache, qtIconCache, qAddPostRoutine(qt_cleanup_icon_cache))

static void qt_cleanup_icon_cache()

{

    qtIconCache()->clear();

}

QIconPrivate::QIconPrivate()

    : engine(0), ref(1),

    serialNum(serialNumCounter.fetchAndAddRelaxed(1)),

    detach_no(0),

    engine_version(2),

    v1RefCount(0)

{

}

QPixmapIconEngine::QPixmapIconEngine()

{

}

QPixmapIconEngine::QPixmapIconEngine(const QPixmapIconEngine &other)

    : QIconEngineV2(other), pixmaps(other.pixmaps)

{

}

QPixmapIconEngine::~QPixmapIconEngine()

{

}

void QPixmapIconEngine::paint(QPainter *painter, const QRect &rect, QIcon::Mode mode, QIcon::State state)

{

    QSize pixmapSize = rect.size();

#if defined(Q_WS_MAC)

    pixmapSize *= qt_mac_get_scalefactor();

#endif

    painter->drawPixmap(rect, pixmap(pixmapSize, mode, state));

}

static inline int area(const QSize &s) { return s.width() * s.height(); }

// returns the smallest of the two that is still larger than or equal to size.

static QPixmapIconEngineEntry *bestSizeMatch( const QSize &size, QPixmapIconEngineEntry *pa, QPixmapIconEngineEntry *pb)

{

    int s = area(size);

    if (pa->size == QSize() && pa->pixmap.isNull()) {

        pa->pixmap = QPixmap(pa->fileName);

        pa->size = pa->pixmap.size();

    }

    int a = area(pa->size);

    if (pb->size == QSize() && pb->pixmap.isNull()) {

        pb->pixmap = QPixmap(pb->fileName);

        pb->size = pb->pixmap.size();

    }

    int b = area(pb->size);

    int res = a;

    if (qMin(a,b) >= s)

        res = qMin(a,b);

    else

        res = qMax(a,b);

    if (res == a)

        return pa;

    return pb;

}

QPixmapIconEngineEntry *QPixmapIconEngine::tryMatch(const QSize &size, QIcon::Mode mode, QIcon::State state)

{

    QPixmapIconEngineEntry *pe = 0;

    for (int i = 0; i < pixmaps.count(); ++i)

        if (pixmaps.at(i).mode == mode && pixmaps.at(i).state == state) {

            if (pe)

                pe = bestSizeMatch(size, &pixmaps[i], pe);

            else

                pe = &pixmaps[i];

        }

    return pe;

}

QPixmapIconEngineEntry *QPixmapIconEngine::bestMatch(const QSize &size, QIcon::Mode mode, QIcon::State state, bool sizeOnly)

{

    QPixmapIconEngineEntry *pe = tryMatch(size, mode, state);

    while (!pe){

        QIcon::State oppositeState = (state == QIcon::On) ? QIcon::Off : QIcon::On;

        if (mode == QIcon::Disabled || mode == QIcon::Selected) {

            QIcon::Mode oppositeMode = (mode == QIcon::Disabled) ? QIcon::Selected : QIcon::Disabled;

            if ((pe = tryMatch(size, QIcon::Normal, state)))

                break;

            if ((pe = tryMatch(size, QIcon::Active, state)))

                break;

            if ((pe = tryMatch(size, mode, oppositeState)))

                break;

            if ((pe = tryMatch(size, QIcon::Normal, oppositeState)))

                break;

            if ((pe = tryMatch(size, QIcon::Active, oppositeState)))

                break;

            if ((pe = tryMatch(size, oppositeMode, state)))

                break;

            if ((pe = tryMatch(size, oppositeMode, oppositeState)))

                break;

        } else {

            QIcon::Mode oppositeMode = (mode == QIcon::Normal) ? QIcon::Active : QIcon::Normal;

            if ((pe = tryMatch(size, oppositeMode, state)))

                break;

            if ((pe = tryMatch(size, mode, oppositeState)))

                break;

            if ((pe = tryMatch(size, oppositeMode, oppositeState)))

                break;

            if ((pe = tryMatch(size, QIcon::Disabled, state)))

                break;

            if ((pe = tryMatch(size, QIcon::Selected, state)))

                break;

            if ((pe = tryMatch(size, QIcon::Disabled, oppositeState)))

                break;

            if ((pe = tryMatch(size, QIcon::Selected, oppositeState)))

                break;

        }

        if (!pe)

            return pe;

    }

    if (sizeOnly ? (pe->size.isNull() || !pe->size.isValid()) : pe->pixmap.isNull()) {

        pe->pixmap = QPixmap(pe->fileName);

        if (!pe->pixmap.isNull())

            pe->size = pe->pixmap.size();

    }

    return pe;

}

QPixmap QPixmapIconEngine::pixmap(const QSize &size, QIcon::Mode mode, QIcon::State state)

{

    QPixmap pm;

    QPixmapIconEngineEntry *pe = bestMatch(size, mode, state, false);

    if (pe)

        pm = pe->pixmap;

    if (pm.isNull()) {

        int idx = pixmaps.count();

        while (--idx >= 0) {

            if (pe == &pixmaps[idx]) {

                pixmaps.remove(idx);

                break;

            }

        }

        if (pixmaps.isEmpty())

            return pm;

        else

            return pixmap(size, mode, state);

    }

    QSize actualSize = pm.size();

    if (!actualSize.isNull() && (actualSize.width() > size.width() || actualSize.height() > size.height()))

        actualSize.scale(size, Qt::KeepAspectRatio);

    QString key = QLatin1String("$qt_icon_")

                  + QString::number(pm.cacheKey())

                  + QString::number(pe->mode)

                  + QString::number(QApplication::palette().cacheKey())

                  + QLatin1Char('_')

                  + QString::number(actualSize.width())

                  + QLatin1Char('_')

                  + QString::number(actualSize.height())

                  + QLatin1Char('_');

    if (mode == QIcon::Active) {

        if (QPixmapCache::find(key + QString::number(mode), pm))

            return pm; // horray

        if (QPixmapCache::find(key + QString::number(QIcon::Normal), pm)) {

            QStyleOption opt(0);

            opt.palette = QApplication::palette();

            QPixmap active = QApplication::style()->generatedIconPixmap(QIcon::Active, pm, &opt);

            if (pm.cacheKey() == active.cacheKey())

                return pm;

        }

    }

    if (!QPixmapCache::find(key + QString::number(mode), pm)) {

        if (pm.size() != actualSize)

            pm = pm.scaled(actualSize, Qt::IgnoreAspectRatio, Qt::SmoothTransformation);

        if (pe->mode != mode && mode != QIcon::Normal) {

            QStyleOption opt(0);

            opt.palette = QApplication::palette();

            QPixmap generated = QApplication::style()->generatedIconPixmap(mode, pm, &opt);

            if (!generated.isNull())

                pm = generated;

        }

        QPixmapCache::insert(key + QString::number(mode), pm);

    }

    return pm;

}

QSize QPixmapIconEngine::actualSize(const QSize &size, QIcon::Mode mode, QIcon::State state)

{

    QSize actualSize;

    if (QPixmapIconEngineEntry *pe = bestMatch(size, mode, state, true))

        actualSize = pe->size;

    if (actualSize.isNull())

        return actualSize;

    if (!actualSize.isNull() && (actualSize.width() > size.width() || actualSize.height() > size.height()))

        actualSize.scale(size, Qt::KeepAspectRatio);

    return actualSize;

}

void QPixmapIconEngine::addPixmap(const QPixmap &pixmap, QIcon::Mode mode, QIcon::State state)

{

    if (!pixmap.isNull()) {

        QPixmapIconEngineEntry *pe = tryMatch(pixmap.size(), mode, state);

        if(pe && pe->size == pixmap.size()) {

            pe->pixmap = pixmap;

            pe->fileName.clear();

        } else {

            pixmaps += QPixmapIconEngineEntry(pixmap, mode, state);

        }

    }

}

void QPixmapIconEngine::addFile(const QString &fileName, const QSize &_size, QIcon::Mode mode, QIcon::State state)

{

    if (!fileName.isEmpty()) {

        QSize size = _size;

        QPixmap pixmap;

        QString abs = fileName;

        if (fileName.at(0) != QLatin1Char(':'))

            abs = QFileInfo(fileName).absoluteFilePath();

        for (int i = 0; i < pixmaps.count(); ++i) {

            if (pixmaps.at(i).mode == mode && pixmaps.at(i).state == state) {

                QPixmapIconEngineEntry *pe = &pixmaps[i];

                if(size == QSize()) {

                    pixmap = QPixmap(abs);

                    size = pixmap.size();

                }

                if (pe->size == QSize() && pe->pixmap.isNull()) {

                    pe->pixmap = QPixmap(pe->fileName);

                    pe->size = pe->pixmap.size();

                }

                if(pe->size == size) {

                    pe->pixmap = pixmap;

                    pe->fileName = abs;

                    return;

                }

            }

        }

        QPixmapIconEngineEntry e(abs, size, mode, state);

        e.pixmap = pixmap;

        pixmaps += e;

    }

}

QString QPixmapIconEngine::key() const

{

    return QLatin1String("QPixmapIconEngine");

}

QIconEngineV2 *QPixmapIconEngine::clone() const

{

    return new QPixmapIconEngine(*this);

}

bool QPixmapIconEngine::read(QDataStream &in)

{

    int num_entries;

    QPixmap pm;

    QString fileName;

    QSize sz;

    uint mode;

    uint state;

    in >> num_entries;

    for (int i=0; i < num_entries; ++i) {

        if (in.atEnd()) {

            pixmaps.clear();

            return false;

        }

        in >> pm;

        in >> fileName;

        in >> sz;

        in >> mode;

        in >> state;

        if (pm.isNull()) {

            addFile(fileName, sz, QIcon::Mode(mode), QIcon::State(state));

        } else {

            QPixmapIconEngineEntry pe(fileName, sz, QIcon::Mode(mode), QIcon::State(state));

            pe.pixmap = pm;

            pixmaps += pe;

        }

    }

    return true;

}

bool QPixmapIconEngine::write(QDataStream &out) const

{

    int num_entries = pixmaps.size();

    out << num_entries;

    for (int i=0; i < num_entries; ++i) {

        if (pixmaps.at(i).pixmap.isNull())

            out << QPixmap(pixmaps.at(i).fileName);

        else

            out << pixmaps.at(i).pixmap;

        out << pixmaps.at(i).fileName;

        out << pixmaps.at(i).size;

        out << (uint) pixmaps.at(i).mode;

        out << (uint) pixmaps.at(i).state;

    }

    return true;

}

void QPixmapIconEngine::virtual_hook(int id, void *data)

{

    switch (id) {

    case QIconEngineV2::AvailableSizesHook: {

        QIconEngineV2::AvailableSizesArgument &arg =

            *reinterpret_cast<QIconEngineV2::AvailableSizesArgument*>(data);

        arg.sizes.clear();

        for (int i = 0; i < pixmaps.size(); ++i) {

            QPixmapIconEngineEntry &pe = pixmaps[i];

            if (pe.size == QSize() && pe.pixmap.isNull()) {

                pe.pixmap = QPixmap(pe.fileName);

                pe.size = pe.pixmap.size();

            }

            if (pe.mode == arg.mode && pe.state == arg.state && !pe.size.isEmpty())

                arg.sizes.push_back(pe.size);

        }

        break;

    }

    default:

        QIconEngineV2::virtual_hook(id, data);

    }

}

#if !defined (QT_NO_LIBRARY) && !defined(QT_NO_SETTINGS)

Q_GLOBAL_STATIC_WITH_ARGS(QFactoryLoader, loader,

    (QIconEngineFactoryInterface_iid, QLatin1String("/iconengines"), Qt::CaseInsensitive))

Q_GLOBAL_STATIC_WITH_ARGS(QFactoryLoader, loaderV2,

    (QIconEngineFactoryInterfaceV2_iid, QLatin1String("/iconengines"), Qt::CaseInsensitive))

#endif

/*!

  \class QIcon

  \brief The QIcon class provides scalable icons in different modes

  and states.

  \ingroup painting

  \ingroup shared

  A QIcon can generate smaller, larger, active, and disabled pixmaps

  from the set of pixmaps it is given. Such pixmaps are used by Qt

  widgets to show an icon representing a particular action.

  The simplest use of QIcon is to create one from a QPixmap file or

  resource, and then use it, allowing Qt to work out all the required

  icon styles and sizes. For example:

  \snippet doc/src/snippets/code/src_gui_image_qicon.cpp 0

  To undo a QIcon, simply set a null icon in its place:

  \snippet doc/src/snippets/code/src_gui_image_qicon.cpp 1

  Use the QImageReader::supportedImageFormats() and

  QImageWriter::supportedImageFormats() functions to retrieve a

  complete list of the supported file formats.

  When you retrieve a pixmap using pixmap(QSize, Mode, State), and no

  pixmap for this given size, mode and state has been added with

  addFile() or addPixmap(), then QIcon will generate one on the

  fly. This pixmap generation happens in a QIconEngineV2. The default

  engine scales pixmaps down if required, but never up, and it uses

  the current style to calculate a disabled appearance. By using

  custom icon engines, you can customize every aspect of generated

  icons. With QIconEnginePluginV2 it is possible to register different

  icon engines for different file suffixes, making it possible for

  third parties to provide additional icon engines to those included

  with Qt.

  \note Since Qt 4.2, an icon engine that supports SVG is included.

  \section1 Making Classes that Use QIcon

  If you write your own widgets that have an option to set a small

  pixmap, consider allowing a QIcon to be set for that pixmap.  The

  Qt class QToolButton is an example of such a widget.

  Provide a method to set a QIcon, and when you draw the icon, choose

  whichever pixmap is appropriate for the current state of your widget.

  For example:

  \snippet doc/src/snippets/code/src_gui_image_qicon.cpp 2

  You might also make use of the \c Active mode, perhaps making your

  widget \c Active when the mouse is over the widget (see \l

  QWidget::enterEvent()), while the mouse is pressed pending the

  release that will activate the function, or when it is the currently

  selected item. If the widget can be toggled, the "On" mode might be

  used to draw a different icon.

  \img icon.png QIcon

  \sa {fowler}{GUI Design Handbook: Iconic Label}, {Icons Example}

*/

/*!

  Constructs a null icon.

*/

QIcon::QIcon()

    : d(0)

{

}

/*!

  Constructs an icon from a \a pixmap.

 */

QIcon::QIcon(const QPixmap &pixmap)

    :d(0)

{

    addPixmap(pixmap);

}

/*!

  Constructs a copy of \a other. This is very fast.

*/

QIcon::QIcon(const QIcon &other)

    :d(other.d)

{

    if (d)

        d->ref.ref();

}

/*!

    Constructs an icon from the file with the given \a fileName. The

    file will be loaded on demand.

    If \a fileName contains a relative path (e.g. the filename only)

    the relevant file must be found relative to the runtime working

    directory.

    The file name can be either refer to an actual file on disk or to

    one of the application's embedded resources.  See the

    \l{resources.html}{Resource System} overview for details on how to

    embed images and other resource files in the application's

    executable.

    Use the QImageReader::supportedImageFormats() and

    QImageWriter::supportedImageFormats() functions to retrieve a

    complete list of the supported file formats.

*/

QIcon::QIcon(const QString &fileName)

    : d(0)

{

    addFile(fileName);

}

/*!

    Creates an icon with a specific icon \a engine. The icon takes

    ownership of the engine.

*/

QIcon::QIcon(QIconEngine *engine)

    :d(new QIconPrivate)

{

    d->engine_version = 1;

    d->engine = engine;

    d->v1RefCount = new QAtomicInt(1);

}

/*!

    Creates an icon with a specific icon \a engine. The icon takes

    ownership of the engine.

*/

QIcon::QIcon(QIconEngineV2 *engine)

    :d(new QIconPrivate)

{

    d->engine_version = 2;

    d->engine = engine;

}

/*!

    Destroys the icon.

*/

QIcon::~QIcon()

{

    if (d && !d->ref.deref())

        delete d;

}

/*!

    Assigns the \a other icon to this icon and returns a reference to

    this icon.

*/

QIcon &QIcon::operator=(const QIcon &other)

{

    if (other.d)

        other.d->ref.ref();

    if (d && !d->ref.deref())

        delete d;

    d = other.d;

    return *this;

}

/*!

   Returns the icon as a QVariant.

*/

QIcon::operator QVariant() const

{

    return QVariant(QVariant::Icon, this);

}

/*! \obsolete

    Returns a number that identifies the contents of this

    QIcon object. Distinct QIcon objects can have

    the same serial number if they refer to the same contents

    (but they don't have to). Also, the serial number of

    a QIcon object may change during its lifetime.

    Use cacheKey() instead.

    A null icon always has a serial number of 0.

    Serial numbers are mostly useful in conjunction with caching.

    \sa QPixmap::serialNumber()

*/

int QIcon::serialNumber() const

{

    return d ? d->serialNum : 0;

}

/*!

    Returns a number that identifies the contents of this QIcon

    object. Distinct QIcon objects can have the same key if

    they refer to the same contents.

    \since 4.3

    The cacheKey() will change when the icon is altered via

    addPixmap() or addFile().

    Cache keys are mostly useful in conjunction with caching.

    \sa QPixmap::cacheKey()

*/

qint64 QIcon::cacheKey() const

{

    if (!d)

        return 0;

    return (((qint64) d->serialNum) << 32) | ((qint64) (d->detach_no));

}

/*!

  Returns a pixmap with the requested \a size, \a mode, and \a

  state, generating one if necessary. The pixmap might be smaller than

  requested, but never larger.

  \sa actualSize(), paint()

*/

QPixmap QIcon::pixmap(const QSize &size, Mode mode, State state) const

{

    if (!d)

        return QPixmap();

    return d->engine->pixmap(size, mode, state);

}

/*!

    \fn QPixmap QIcon::pixmap(int w, int h, Mode mode = Normal, State state = Off) const

    \overload

    Returns a pixmap of size QSize(\a w, \a h). The pixmap might be smaller than

    requested, but never larger.

*/

/*!

    \fn QPixmap QIcon::pixmap(int extent, Mode mode = Normal, State state = Off) const

    \overload

    Returns a pixmap of size QSize(\a extent, \a extent). The pixmap might be smaller

    than requested, but never larger.

*/

/*!  Returns the actual size of the icon for the requested \a size, \a

  mode, and \a state. The result might be smaller than requested, but

  never larger.

  \sa pixmap(), paint()

*/

QSize QIcon::actualSize(const QSize &size, Mode mode, State state) const

{

    if (!d)

        return QSize();

    return d->engine->actualSize(size, mode, state);

}

/*!

    Uses the \a painter to paint the icon with specified \a alignment,

    required \a mode, and \a state into the rectangle \a rect.

    \sa actualSize(), pixmap()

*/

void QIcon::paint(QPainter *painter, const QRect &rect, Qt::Alignment alignment, Mode mode, State state) const

{

    if (!d || !painter)

        return;

    QRect alignedRect = QStyle::alignedRect(painter->layoutDirection(), alignment, d->engine->actualSize(rect.size(), mode, state), rect);

    d->engine->paint(painter, alignedRect, mode, state);

}

/*!

    \fn void QIcon::paint(QPainter *painter, int x, int y, int w, int h, Qt::Alignment alignment,

                          Mode mode, State state) const

    \overload

    Paints the icon into the rectangle QRect(\a x, \a y, \a w, \a h).

*/

/*!

    Returns true if the icon is empty; otherwise returns false.

    An icon is empty if it has neither a pixmap nor a filename.

    Note: Even a non-null icon might not be able to create valid

    pixmaps, eg. if the file does not exist or cannot be read.

*/

bool QIcon::isNull() const

{

    return !d;

}

/*!\internal

 */

bool QIcon::isDetached() const

{

    return !d || d->ref == 1;

}

/*! \internal

 */

void QIcon::detach()

{

    if (d) {

        if (d->ref != 1) {

            QIconPrivate *x = new QIconPrivate;

            if (d->engine_version > 1) {

                QIconEngineV2 *engine = static_cast<QIconEngineV2 *>(d->engine);

                x->engine = engine->clone();

            } else {

                x->engine = d->engine;

                x->v1RefCount = d->v1RefCount;

                x->v1RefCount->ref();

            }

            x->engine_version = d->engine_version;

            if (!d->ref.deref())

                delete d;

            d = x;

        }

        ++d->detach_no;

    }

}

/*!

    Adds \a pixmap to the icon, as a specialization for \a mode and

    \a state.

    Custom icon engines are free to ignore additionally added

    pixmaps.

    \sa addFile()

*/

void QIcon::addPixmap(const QPixmap &pixmap, Mode mode, State state)

{

    if (pixmap.isNull())

        return;

    if (!d) {

        d = new QIconPrivate;

        d->engine = new QPixmapIconEngine;

    } else {

        detach();

    }

    d->engine->addPixmap(pixmap, mode, state);

}

/*!  Adds an image from the file with the given \a fileName to the

     icon, as a specialization for \a size, \a mode and \a state. The

     file will be loaded on demand. Note: custom icon engines are free

     to ignore additionally added pixmaps.

     If \a fileName contains a relative path (e.g. the filename only)

     the relevant file must be found relative to the runtime working

     directory.

    The file name can be either refer to an actual file on disk or to

    one of the application's embedded resources. See the

    \l{resources.html}{Resource System} overview for details on how to

    embed images and other resource files in the application's

    executable.

    Use the QImageReader::supportedImageFormats() and

    QImageWriter::supportedImageFormats() functions to retrieve a

    complete list of the supported file formats.

    Note: When you add a non-empty filename to a QIcon, the icon becomes

    non-null, even if the file doesn't exist or points to a corrupt file.

    \sa addPixmap()

 */

void QIcon::addFile(const QString &fileName, const QSize &size, Mode mode, State state)

{

    if (fileName.isEmpty())

        return;

    if (!d) {

#if !defined (QT_NO_LIBRARY) && !defined(QT_NO_SETTINGS)

        QFileInfo info(fileName);

        QString suffix = info.suffix();

        if (!suffix.isEmpty()) {

            // first try version 2 engines..

            if (QIconEngineFactoryInterfaceV2 *factory = qobject_cast<QIconEngineFactoryInterfaceV2*>(loaderV2()->instance(suffix))) {

                if (QIconEngine *engine = factory->create(fileName)) {

                    d = new QIconPrivate;

                    d->engine = engine;

                }

            }

            // ..then fall back and try to load version 1 engines

            if (!d) {

                if (QIconEngineFactoryInterface *factory = qobject_cast<QIconEngineFactoryInterface*>(loader()->instance(suffix))) {

                    if (QIconEngine *engine = factory->create(fileName)) {

                        d = new QIconPrivate;

                        d->engine = engine;

                        d->engine_version = 1;

                        d->v1RefCount = new QAtomicInt(1);

                    }

                }

            }

        }

#endif

        // ...then fall back to the default engine

        if (!d) {

            d = new QIconPrivate;

            d->engine = new QPixmapIconEngine;

        }

    } else {

        detach();

    }

    d->engine->addFile(fileName, size, mode, state);

}

/*!

    \since 4.5

    Returns a list of available icon sizes for the specified \a mode and

    \a state.

*/

QList<QSize> QIcon::availableSizes(Mode mode, State state) const

{

    if (!d || !d->engine || d->engine_version < 2)

        return QList<QSize>();

    QIconEngineV2 *engine = static_cast<QIconEngineV2*>(d->engine);

    return engine->availableSizes(mode, state);

}

/*!

    \since 4.6

    Sets the search paths for icon themes to \a paths.

    \sa themeSearchPaths(), fromTheme(), setThemeName()

*/

void QIcon::setThemeSearchPaths(const QStringList &paths)

{

    QIconLoader::instance()->setThemeSearchPath(paths);

}

/*!

  \since 4.6

  Returns the search paths for icon themes.

  The default value will depend on the platform:

  On X11, the search path will use the XDG_DATA_DIRS environment

  variable if available.

  By default all platforms will have the resource directory

  \c{:\icons} as a fallback. You can use "rcc -project" to generate a

  resource file from your icon theme.

  \sa setThemeSearchPaths(), fromTheme(), setThemeName()

*/

QStringList QIcon::themeSearchPaths()

{

    return QIconLoader::instance()->themeSearchPaths();

}

/*!

    \since 4.6

    Sets the current icon theme to \a name.

    The \a name should correspond to a directory name in the

    themeSearchPath() containing an index.theme

    file describing it's contents.

    \sa themeSearchPaths(), themeName()

*/

void QIcon::setThemeName(const QString &name)

{

    QIconLoader::instance()->setThemeName(name);

}

/*!

    \since 4.6

    Returns the name of the current icon theme.

    On X11, the current icon theme depends on your desktop

    settings. On other platforms it is not set by default.

    \sa setThemeName(), themeSearchPaths(), fromTheme(),

    hasThemeIcon()

*/

QString QIcon::themeName()

{

    return QIconLoader::instance()->themeName();

}

/*!

    \since 4.6

    Returns the QIcon corresponding to \a name in the current

    icon theme. If no such icon is found in the current theme

    \a fallback is return instead.

    The lastest version of the freedesktop icon specification and naming

    spesification can be obtained here:

    http://standards.freedesktop.org/icon-theme-spec/icon-theme-spec-latest.html

    http://standards.freedesktop.org/icon-naming-spec/icon-naming-spec-latest.html

    To fetch an icon from the current icon theme:

    \snippet doc/src/snippets/code/src_gui_image_qicon.cpp 3

    Or if you want to provide a guaranteed fallback for platforms that

    do not support theme icons, you can use the second argument:

    \snippet doc/src/snippets/code/src_gui_image_qicon.cpp 4

    \note By default, only X11 will support themed icons. In order to

    use themed icons on Mac and Windows, you will have to bundle a

    compliant theme in one of your themeSearchPaths() and set the

    appropriate themeName().

    \sa themeName(), setThemeName(), themeSearchPaths()

*/

QIcon QIcon::fromTheme(const QString &name, const QIcon &fallback)

{

    QIcon icon;

    if (qtIconCache()->contains(name)) {

        icon = *qtIconCache()->object(name);

    } else {

        QIcon *cachedIcon  = new QIcon(new QIconLoaderEngine(name));

        qtIconCache()->insert(name, cachedIcon);

        icon = *cachedIcon;

    }

    // Note the qapp check is to allow lazy loading of static icons

    // Supporting fallbacks will not work for this case.

    if (qApp && icon.availableSizes().isEmpty())

        return fallback;

    return icon;

}

/*!

    \since 4.6

    Returns true if there is an icon available for \a name in the

    current icon theme, otherwise returns false.

    \sa themeSearchPaths(), fromTheme(), setThemeName()

*/

bool QIcon::hasThemeIcon(const QString &name)

{

    QIcon icon = fromTheme(name);

    return !icon.isNull();

}

/*****************************************************************************

  QIcon stream functions

 *****************************************************************************/

#if !defined(QT_NO_DATASTREAM)

/*!

    \fn QDataStream &operator<<(QDataStream &stream, const QIcon &icon)

    \relates QIcon

    \since 4.2

    Writes the given \a icon to the given \a stream as a PNG

    image. If the icon contains more than one image, all images will

    be written to the stream. Note that writing the stream to a file

    will not produce a valid image file.

*/

QDataStream &operator<<(QDataStream &s, const QIcon &icon)

{

    if (s.version() >= QDataStream::Qt_4_3) {

        if (icon.isNull()) {

            s << QString();

        } else {

            if (icon.d->engine_version > 1) {

                QIconEngineV2 *engine = static_cast<QIconEngineV2 *>(icon.d->engine);

                s << engine->key();

                engine->write(s);

            } else {

                // not really supported

                qWarning("QIcon: Cannot stream QIconEngine. Use QIconEngineV2 instead.");

            }

        }

    } else if (s.version() == QDataStream::Qt_4_2) {

        if (icon.isNull()) {

            s << 0;

        } else {

            QPixmapIconEngine *engine = static_cast<QPixmapIconEngine *>(icon.d->engine);

            int num_entries = engine->pixmaps.size();

            s << num_entries;

            for (int i=0; i < num_entries; ++i) {

                s << engine->pixmaps.at(i).pixmap;

                s << engine->pixmaps.at(i).fileName;

                s << engine->pixmaps.at(i).size;

                s << (uint) engine->pixmaps.at(i).mode;

                s << (uint) engine->pixmaps.at(i).state;

            }

        }

    } else {

        s << QPixmap(icon.pixmap(22,22));

    }

    return s;

}

/*!

    \fn QDataStream &operator>>(QDataStream &stream, QIcon &icon)

    \relates QIcon

    \since 4.2

    Reads an image, or a set of images, from the given \a stream into

    the given \a icon.

*/

QDataStream &operator>>(QDataStream &s, QIcon &icon)

{

    if (s.version() >= QDataStream::Qt_4_3) {

        icon = QIcon();

        QString key;

        s >> key;

        if (key == QLatin1String("QPixmapIconEngine")) {

            icon.d = new QIconPrivate;

            QIconEngineV2 *engine = new QPixmapIconEngine;

            icon.d->engine = engine;

            engine->read(s);

        } else if (key == QLatin1String("QIconLoaderEngine")) {

            icon.d = new QIconPrivate;

            QIconEngineV2 *engine = new QIconLoaderEngine();

            icon.d->engine = engine;

            engine->read(s);

#if !defined (QT_NO_LIBRARY) && !defined(QT_NO_SETTINGS)

        } else if (QIconEngineFactoryInterfaceV2 *factory = qobject_cast<QIconEngineFactoryInterfaceV2*>(loaderV2()->instance(key))) {

            if (QIconEngineV2 *engine= factory->create()) {

                icon.d = new QIconPrivate;

                icon.d->engine = engine;

                engine->read(s);

            }

#endif

        }

    } else if (s.version() == QDataStream::Qt_4_2) {

        icon = QIcon();

        int num_entries;

        QPixmap pm;

        QString fileName;

        QSize sz;

        uint mode;

        uint state;

        s >> num_entries;

        for (int i=0; i < num_entries; ++i) {

            s >> pm;

            s >> fileName;

            s >> sz;

            s >> mode;

            s >> state;

            if (pm.isNull())

                icon.addFile(fileName, sz, QIcon::Mode(mode), QIcon::State(state));

            else

                icon.addPixmap(pm, QIcon::Mode(mode), QIcon::State(state));

        }

    } else {

        QPixmap pm;

        s >> pm;

        icon.addPixmap(pm);

    }

    return s;

}

#endif //QT_NO_DATASTREAM

#ifdef QT3_SUPPORT

static int widths[2] = { 22, 32 };

static int heights[2] = { 22, 32 };

static QSize pixmapSizeHelper(QIcon::Size which)

{

    int i = 0;

    if (which == QIcon::Large)

        i = 1;

    return QSize(widths[i], heights[i]);

}

/*!

    \enum QIcon::Size

    \compat

    \value Small  Use QStyle::pixelMetric(QStyle::PM_SmallIconSize) instead.

    \value Large  Use QStyle::pixelMetric(QStyle::PM_LargeIconSize) instead.

    \value Automatic  N/A.

*/

/*!

    Use pixmap(QSize(...), \a mode, \a state), where the first

    argument is an appropriate QSize instead of a \l Size value.

    \sa pixmapSize()

*/

QPixmap QIcon::pixmap(Size size, Mode mode, State state) const

{ return pixmap(pixmapSizeHelper(size), mode, state); }

/*!

    Use pixmap(QSize(...), mode, \a state), where the first argument

    is an appropriate QSize instead of a \l Size value, and the

    second argument is QIcon::Normal or QIcon::Disabled, depending on

    the value of \a enabled.

    \sa pixmapSize()

*/

QPixmap QIcon::pixmap(Size size, bool enabled, State state) const

{ return pixmap(pixmapSizeHelper(size), enabled ? Normal : Disabled, state); }

/*!

    Use one of the other pixmap() overloads.

*/

QPixmap QIcon::pixmap() const

{ return pixmap(pixmapSizeHelper(Small), Normal, Off); }

/*!

    The pixmap() function now takes a QSize instead of a QIcon::Size,

    so there is no need for this function in new code.

*/

void QIcon::setPixmapSize(Size which, const QSize &size)

{

    int i = 0;

    if (which == Large)

        i = 1;

    widths[i] = size.width();

    heights[i] = size.height();

}

/*!

    Use QStyle::pixelMetric() with QStyle::PM_SmallIconSize or

    QStyle::PM_LargeIconSize as the first argument, depending on \a

    which.

*/

QSize QIcon::pixmapSize(Size which)

{

    return pixmapSizeHelper(which);

}

/*!

    \fn void QIcon::reset(const QPixmap &pixmap, Size size)

    Use the constructor that takes a QPixmap and operator=().

*/

/*!

    \fn void QIcon::setPixmap(const QPixmap &pixmap, Size size, Mode mode, State state)

    Use addPixmap(\a pixmap, \a mode, \a state) instead. The \a size

    parameter is ignored.

*/

/*!

    \fn void QIcon::setPixmap(const QString &fileName, Size size, Mode mode, State state)

    Use addFile(\a fileName, \a mode, \a state) instead. The \a size

    parameter is ignored.

*/

#endif // QT3_SUPPORT

/*!

    \fn DataPtr &QIcon::data_ptr()

    \internal

*/

/*!

    \typedef QIcon::DataPtr

    \internal

*/

QT_END_NAMESPACE

#endif //QT_NO_ICON