/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtCore module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/

#ifndef QCOREAPPLICATION_H
#define QCOREAPPLICATION_H

#include <QtCore/qglobal.h>
#include <QtCore/qstring.h>
#ifndef QT_NO_QOBJECT
#include <QtCore/qobject.h>
#include <QtCore/qcoreevent.h>
#include <QtCore/qeventloop.h>
#else
#include <QtCore/qscopedpointer.h>
#endif

#ifndef QT_NO_QOBJECT
#if defined(Q_OS_WIN) && !defined(tagMSG)
typedef struct tagMSG MSG;
#endif
#endif

QT_BEGIN_NAMESPACE


class QCoreApplicationPrivate;
class QTextCodec;
class QTranslator;
class QPostEventList;
class QStringList;
class QAbstractEventDispatcher;
class QAbstractNativeEventFilter;

#define qApp QCoreApplication::instance()

class Q_CORE_EXPORT QCoreApplication
#ifndef QT_NO_QOBJECT
    : public QObject
#endif
{
#ifndef QT_NO_QOBJECT
    Q_OBJECT
    Q_PROPERTY(QString applicationName READ applicationName WRITE setApplicationName NOTIFY applicationNameChanged)
    Q_PROPERTY(QString applicationVersion READ applicationVersion WRITE setApplicationVersion NOTIFY applicationVersionChanged)
    Q_PROPERTY(QString organizationName READ organizationName WRITE setOrganizationName NOTIFY organizationNameChanged)
    Q_PROPERTY(QString organizationDomain READ organizationDomain WRITE setOrganizationDomain NOTIFY organizationDomainChanged)
    Q_PROPERTY(bool quitLockEnabled READ isQuitLockEnabled WRITE setQuitLockEnabled)
#endif

    Q_DECLARE_PRIVATE(QCoreApplication)
public:
    enum { ApplicationFlags = QT_VERSION
    };

    QCoreApplication(int &argc, char **argv
#ifndef Q_QDOC
                     , int = ApplicationFlags
#endif
            );

    ~QCoreApplication();

    static QStringList arguments();

    static void setAttribute(Qt::ApplicationAttribute attribute, bool on = true);
    static bool testAttribute(Qt::ApplicationAttribute attribute);

    static void setOrganizationDomain(const QString &orgDomain);
    static QString organizationDomain();
    static void setOrganizationName(const QString &orgName);
    static QString organizationName();
    static void setApplicationName(const QString &application);
    static QString applicationName();
    static void setApplicationVersion(const QString &version);
    static QString applicationVersion();

    static void setSetuidAllowed(bool allow);
    static bool isSetuidAllowed();

    static QCoreApplication *instance() { return self; }

#ifndef QT_NO_QOBJECT
    static int exec();
    static void processEvents(QEventLoop::ProcessEventsFlags flags = QEventLoop::AllEvents);
    static void processEvents(QEventLoop::ProcessEventsFlags flags, int maxtime);
    static void exit(int retcode=0);

    static bool sendEvent(QObject *receiver, QEvent *event);
    static void postEvent(QObject *receiver, QEvent *event, int priority = Qt::NormalEventPriority);
    static void sendPostedEvents(QObject *receiver = Q_NULLPTR, int event_type = 0);
    static void removePostedEvents(QObject *receiver, int eventType = 0);
#if QT_DEPRECATED_SINCE(5, 3)
    QT_DEPRECATED static bool hasPendingEvents();
#endif
    static QAbstractEventDispatcher *eventDispatcher();
    static void setEventDispatcher(QAbstractEventDispatcher *eventDispatcher);

    virtual bool notify(QObject *, QEvent *);

    static bool startingUp();
    static bool closingDown();
#endif

    static QString applicationDirPath();
    static QString applicationFilePath();
    static qint64 applicationPid() Q_DECL_CONST_FUNCTION;

#if QT_CONFIG(library)
    static void setLibraryPaths(const QStringList &);
    static QStringList libraryPaths();
    static void addLibraryPath(const QString &);
    static void removeLibraryPath(const QString &);
#endif // QT_CONFIG(library)

#ifndef QT_NO_TRANSLATION
    static bool installTranslator(QTranslator * messageFile);
    static bool removeTranslator(QTranslator * messageFile);
#endif

    static QString translate(const char * context,
                             const char * key,
                             const char * disambiguation = Q_NULLPTR,
                             int n = -1);
#if QT_DEPRECATED_SINCE(5, 0)
    enum Encoding { UnicodeUTF8, Latin1, DefaultCodec = UnicodeUTF8, CodecForTr = UnicodeUTF8 };
    QT_DEPRECATED static inline QString translate(const char * context, const char * key,
                             const char * disambiguation, Encoding, int n = -1)
        { return translate(context, key, disambiguation, n); }
#endif

#ifndef QT_NO_QOBJECT
#  if QT_DEPRECATED_SINCE(5, 9)
    QT_DEPRECATED static void flush();
#  endif

    void installNativeEventFilter(QAbstractNativeEventFilter *filterObj);
    void removeNativeEventFilter(QAbstractNativeEventFilter *filterObj);

    static bool isQuitLockEnabled();
    static void setQuitLockEnabled(bool enabled);

public Q_SLOTS:
    static void quit();

Q_SIGNALS:
    void aboutToQuit(QPrivateSignal);

    void organizationNameChanged();
    void organizationDomainChanged();
    void applicationNameChanged();
    void applicationVersionChanged();

protected:
    bool event(QEvent *) Q_DECL_OVERRIDE;

    virtual bool compressEvent(QEvent *, QObject *receiver, QPostEventList *);
#endif // QT_NO_QOBJECT

protected:
    QCoreApplication(QCoreApplicationPrivate &p);

#ifdef QT_NO_QOBJECT
    QScopedPointer<QCoreApplicationPrivate> d_ptr;
#endif

private:
#ifndef QT_NO_QOBJECT
    static bool sendSpontaneousEvent(QObject *receiver, QEvent *event);
#  if QT_DEPRECATED_SINCE(5,6)
    QT_DEPRECATED bool notifyInternal(QObject *receiver, QEvent *event); // ### Qt6 BIC: remove me
#  endif
    static bool notifyInternal2(QObject *receiver, QEvent *);
    static bool forwardEvent(QObject *receiver, QEvent *event, QEvent *originatingEvent = nullptr);
#endif

    static QCoreApplication *self;

    Q_DISABLE_COPY(QCoreApplication)

    friend class QApplication;
    friend class QApplicationPrivate;
    friend class QGuiApplication;
    friend class QGuiApplicationPrivate;
    friend class QWidget;
    friend class QWidgetWindow;
    friend class QWidgetPrivate;
#ifndef QT_NO_QOBJECT
    friend class QEventDispatcherUNIXPrivate;
    friend class QCocoaEventDispatcherPrivate;
    friend bool qt_sendSpontaneousEvent(QObject*, QEvent*);
#endif
    friend Q_CORE_EXPORT QString qAppName();
    friend class QClassFactory;
};

#ifndef QT_NO_QOBJECT
inline bool QCoreApplication::sendEvent(QObject *receiver, QEvent *event)
{  if (event) event->spont = false; return notifyInternal2(receiver, event); }

inline bool QCoreApplication::sendSpontaneousEvent(QObject *receiver, QEvent *event)
{ if (event) event->spont = true; return notifyInternal2(receiver, event); }
#endif

#ifdef QT_NO_DEPRECATED
#  define QT_DECLARE_DEPRECATED_TR_FUNCTIONS(context)
#else
#  define QT_DECLARE_DEPRECATED_TR_FUNCTIONS(context) \
    QT_DEPRECATED static inline QString trUtf8(const char *sourceText, const char *disambiguation = Q_NULLPTR, int n = -1) \
        { return QCoreApplication::translate(#context, sourceText, disambiguation, n); }
#endif

#define Q_DECLARE_TR_FUNCTIONS(context) \
public: \
    static inline QString tr(const char *sourceText, const char *disambiguation = Q_NULLPTR, int n = -1) \
        { return QCoreApplication::translate(#context, sourceText, disambiguation, n); } \
    QT_DECLARE_DEPRECATED_TR_FUNCTIONS(context) \
private:

typedef void (*QtStartUpFunction)();
typedef void (*QtCleanUpFunction)();

Q_CORE_EXPORT void qAddPreRoutine(QtStartUpFunction);
Q_CORE_EXPORT void qAddPostRoutine(QtCleanUpFunction);
Q_CORE_EXPORT void qRemovePostRoutine(QtCleanUpFunction);
Q_CORE_EXPORT QString qAppName();                // get application name

#define Q_COREAPP_STARTUP_FUNCTION(AFUNC) \
    static void AFUNC ## _ctor_function() {  \
        qAddPreRoutine(AFUNC);        \
    }                                 \
    Q_CONSTRUCTOR_FUNCTION(AFUNC ## _ctor_function)

#ifndef QT_NO_QOBJECT
#if defined(Q_OS_WIN) && !defined(QT_NO_DEBUG_STREAM)
Q_CORE_EXPORT QString decodeMSG(const MSG &);
Q_CORE_EXPORT QDebug operator<<(QDebug, const MSG &);
#endif
#endif

QT_END_NAMESPACE

#endif // QCOREAPPLICATION_H
