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

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#ifndef QEVENTDISPATCHER_MAC_P_H
#define QEVENTDISPATCHER_MAC_P_H

//
//  W A R N I N G
//  -------------
//
// This file is not part of the Qt API.  It exists purely as an
// implementation detail.  This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//

#include <QtGui/qwindowdefs.h>
#include <QtCore/qhash.h>
#include <QtCore/qstack.h>
#include "private/qabstracteventdispatcher_p.h"
#include "private/qt_mac_p.h"

QT_BEGIN_NAMESPACE

#ifdef QT_MAC_USE_COCOA
typedef struct _NSModalSession *NSModalSession;
typedef struct _QCocoaModalSessionInfo {
    QPointer<QWidget> widget;
    NSModalSession session;
    void *nswindow;
} QCocoaModalSessionInfo;
#endif

class QEventDispatcherMacPrivate;

class QEventDispatcherMac : public QAbstractEventDispatcher
{
    Q_OBJECT
    Q_DECLARE_PRIVATE(QEventDispatcherMac)

public:
    explicit QEventDispatcherMac(QObject *parent = 0);
    ~QEventDispatcherMac();

    bool processEvents(QEventLoop::ProcessEventsFlags flags);
    bool hasPendingEvents();

    void registerSocketNotifier(QSocketNotifier *notifier);
    void unregisterSocketNotifier(QSocketNotifier *notifier);

    void registerTimer(int timerId, int interval, QObject *object);
    bool unregisterTimer(int timerId);
    bool unregisterTimers(QObject *object);
    QList<TimerInfo> registeredTimers(QObject *object) const;

    void wakeUp();
    void flush();
    void interrupt();

private:
    friend void qt_mac_select_timer_callbk(__EventLoopTimer*, void*);
    friend class QApplicationPrivate;
};

struct MacTimerInfo {
    int id;
    int interval;
    QObject *obj;
    bool pending;
    CFRunLoopTimerRef runLoopTimer;
    bool operator==(const MacTimerInfo &other)
    {
        return (id == other.id);
    }
};
typedef QHash<int, MacTimerInfo *> MacTimerHash;

struct MacSocketInfo {
    MacSocketInfo() : socket(0), runloop(0), readNotifier(0), writeNotifier(0) {}
    CFSocketRef socket;
    CFRunLoopSourceRef runloop;
    QObject *readNotifier;
    QObject *writeNotifier;
};
typedef QHash<int, MacSocketInfo *> MacSocketHash;

class QEventDispatcherMacPrivate : public QAbstractEventDispatcherPrivate
{
    Q_DECLARE_PUBLIC(QEventDispatcherMac)

public:
    QEventDispatcherMacPrivate();

    static MacTimerHash macTimerHash;
    // Set 'blockSendPostedEvents' to true if you _really_ need
    // to make sure that qt events are not posted while calling
    // low-level cocoa functions (like beginModalForWindow). And
    // use a QBoolBlocker to be safe:
    static bool blockSendPostedEvents;
#ifdef QT_MAC_USE_COCOA
    // The following variables help organizing modal sessions:
    static QStack<QCocoaModalSessionInfo> cocoaModalSessionStack;
    static bool currentExecIsNSAppRun;
    static bool nsAppRunCalledByQt;
    static bool cleanupModalSessionsNeeded;
    static NSModalSession currentModalSessionCached;
    static NSModalSession currentModalSession();
    static void updateChildrenWorksWhenModal();
    static void temporarilyStopAllModalSessions();
    static void beginModalSession(QWidget *widget);
    static void endModalSession(QWidget *widget);
    static void cancelWaitForMoreEvents();
    static void cleanupModalSessions();
    static void ensureNSAppInitialized();
#endif

    MacSocketHash macSockets;
    QList<void *> queuedUserInputEvents; // List of EventRef in Carbon, and NSEvent * in Cocoa
    CFRunLoopSourceRef postedEventsSource;
    CFRunLoopObserverRef waitingObserver;
    CFRunLoopObserverRef firstTimeObserver;
    QAtomicInt serialNumber;
    int lastSerial;
    static bool interrupt;
private:
    static Boolean postedEventSourceEqualCallback(const void *info1, const void *info2);
    static void postedEventsSourcePerformCallback(void *info);
    static void activateTimer(CFRunLoopTimerRef, void *info);
    static void waitingObserverCallback(CFRunLoopObserverRef observer,
                                        CFRunLoopActivity activity, void *info);
    static void firstLoopEntry(CFRunLoopObserverRef ref, CFRunLoopActivity activity, void *info);
};

#ifdef QT_MAC_USE_COCOA
class QtMacInterruptDispatcherHelp : public QObject
{
    static QtMacInterruptDispatcherHelp *instance;
    bool cancelled;

    QtMacInterruptDispatcherHelp();
    ~QtMacInterruptDispatcherHelp();

    public:
    static void interruptLater();
    static void cancelInterruptLater();
};
#endif

QT_END_NAMESPACE

#endif // QEVENTDISPATCHER_MAC_P_H
