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#include "macfullscreen.h"

#include <AppKit/NSView.h>
#include <AppKit/NSWindow.h>
#include <Foundation/NSNotification.h>

#include <QSysInfo>
#include <qglobal.h>

enum {
    Qtc_NSWindowCollectionBehaviorFullScreenPrimary = (1 << 7)
};

static NSString *Qtc_NSWindowDidEnterFullScreenNotification = @"NSWindowDidEnterFullScreenNotification";
static NSString *Qtc_NSWindowDidExitFullScreenNotification = @"NSWindowDidExitFullScreenNotification";

@interface WindowObserver : NSObject {
    Core::Internal::MainWindow *window;
}

- (id)initWithMainWindow:(Core::Internal::MainWindow *)w;

- (void)notifyDidEnterFullScreen:(NSNotification *)notification;
- (void)notifyDidExitFullScreen:(NSNotification *)notification;

@end

@implementation WindowObserver

- (id)initWithMainWindow:(Core::Internal::MainWindow *)w
{
    if ((self = [self init])) {
        window = w;
    }
    return self;
}

- (void)notifyDidEnterFullScreen:(NSNotification *)notification
{
    Q_UNUSED(notification)
    window->setIsFullScreen(true);
}

- (void)notifyDidExitFullScreen:(NSNotification* )notification
{
    Q_UNUSED(notification)
    window->setIsFullScreen(false);
}

@end

static WindowObserver *observer = nil;

using namespace Core::Internal;

bool MacFullScreen::supportsFullScreen()
{
    return QSysInfo::MacintoshVersion >= QSysInfo::MV_LION;
}

void MacFullScreen::addFullScreen(MainWindow *window)
{
    if (supportsFullScreen()) {
        NSView *nsview = (NSView *) window->winId();
        NSWindow *nswindow = [nsview window];
        [nswindow setCollectionBehavior:Qtc_NSWindowCollectionBehaviorFullScreenPrimary];

        if (observer == nil)
            observer = [[WindowObserver alloc] initWithMainWindow:window];
        NSNotificationCenter *nc = [NSNotificationCenter defaultCenter];
        [nc addObserver:observer selector:@selector(notifyDidEnterFullScreen:)
            name:Qtc_NSWindowDidEnterFullScreenNotification object:nswindow];
        [nc addObserver:observer selector:@selector(notifyDidExitFullScreen:)
            name:Qtc_NSWindowDidExitFullScreenNotification object:nswindow];
    }
}

void MacFullScreen::toggleFullScreen(MainWindow *window)
{
    if (supportsFullScreen()) {
        NSView *nsview = (NSView *) window->winId();
        NSWindow *nswindow = [nsview window];
        [nswindow performSelector:@selector(toggleFullScreen:) withObject: nil];
    }
}