summaryrefslogtreecommitdiffstats
path: root/src/plugins/platforms/cocoa/qcocoawindow.mm
blob: ef94b49736d5bd96ef61f20a3238007623eb87ac (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only

#include <AppKit/AppKit.h>
#include <QuartzCore/QuartzCore.h>

#include "qcocoawindow.h"
#include "qcocoaintegration.h"
#include "qcocoascreen.h"
#include "qnswindowdelegate.h"
#include "qcocoaeventdispatcher.h"
#ifndef QT_NO_OPENGL
#include "qcocoaglcontext.h"
#endif
#include "qcocoahelpers.h"
#include "qcocoanativeinterface.h"
#include "qnsview.h"
#include "qnswindow.h"
#include <QtCore/qfileinfo.h>
#include <QtCore/private/qcore_mac_p.h>
#include <qwindow.h>
#include <private/qwindow_p.h>
#include <qpa/qwindowsysteminterface.h>
#include <qpa/qplatformscreen.h>
#include <QtGui/private/qcoregraphics_p.h>
#include <QtGui/private/qhighdpiscaling_p.h>

#include <QDebug>

#include <vector>

QT_BEGIN_NAMESPACE

enum {
    defaultWindowWidth = 160,
    defaultWindowHeight = 160
};

Q_LOGGING_CATEGORY(lcCocoaNotifications, "qt.qpa.cocoa.notifications");

static void qRegisterNotificationCallbacks()
{
    static const QLatin1StringView notificationHandlerPrefix(Q_NOTIFICATION_PREFIX);

    NSNotificationCenter *center = [NSNotificationCenter defaultCenter];

    const QMetaObject *metaObject = QMetaType(qRegisterMetaType<QCocoaWindow*>()).metaObject();
    Q_ASSERT(metaObject);

    for (int i = 0; i < metaObject->methodCount(); ++i) {
        QMetaMethod method = metaObject->method(i);
        const QString methodTag = QString::fromLatin1(method.tag());
        if (!methodTag.startsWith(notificationHandlerPrefix))
            continue;

        const QString notificationName = methodTag.mid(notificationHandlerPrefix.size());
        [center addObserverForName:notificationName.toNSString() object:nil queue:nil
            usingBlock:^(NSNotification *notification) {

            QVarLengthArray<QCocoaWindow *, 32> cocoaWindows;
            if ([notification.object isKindOfClass:[NSWindow class]]) {
                NSWindow *nsWindow = notification.object;
                for (const QWindow *window : QGuiApplication::allWindows()) {
                    if (QCocoaWindow *cocoaWindow = static_cast<QCocoaWindow *>(window->handle()))
                        if (cocoaWindow->nativeWindow() == nsWindow)
                            cocoaWindows += cocoaWindow;
                }
            } else if ([notification.object isKindOfClass:[NSView class]]) {
                if (QNSView *qnsView = qnsview_cast(notification.object))
                    cocoaWindows += qnsView.platformWindow;
            } else {
                qCWarning(lcCocoaNotifications) << "Unhandled notification"
                    << notification.name << "for" << notification.object;
                return;
            }

            if (lcCocoaNotifications().isDebugEnabled() && !cocoaWindows.isEmpty()) {
                QVector<QCocoaWindow *> debugWindows;
                for (QCocoaWindow *cocoaWindow : cocoaWindows)
                    debugWindows += cocoaWindow;
                qCDebug(lcCocoaNotifications) << "Forwarding" << qPrintable(notificationName) <<
                    "to" << debugWindows;
            }

            // FIXME: Could be a foreign window, look up by iterating top level QWindows

            for (QCocoaWindow *cocoaWindow : cocoaWindows) {
                if (!method.invoke(cocoaWindow, Qt::DirectConnection)) {
                    qCWarning(lcQpaWindow) << "Failed to invoke NSNotification callback for"
                        << notification.name << "on" << cocoaWindow;
                }
            }
        }];
    }
}
Q_CONSTRUCTOR_FUNCTION(qRegisterNotificationCallbacks)

const int QCocoaWindow::NoAlertRequest = -1;
QPointer<QCocoaWindow> QCocoaWindow::s_windowUnderMouse;

QCocoaWindow::QCocoaWindow(QWindow *win, WId nativeHandle)
    : QPlatformWindow(win)
    , m_view(nil)
    , m_nsWindow(nil)
    , m_lastReportedWindowState(Qt::WindowNoState)
    , m_windowModality(Qt::NonModal)
    , m_initialized(false)
    , m_inSetVisible(false)
    , m_inSetGeometry(false)
    , m_inSetStyleMask(false)
    , m_menubar(nullptr)
    , m_frameStrutEventsEnabled(false)
    , m_registerTouchCount(0)
    , m_resizableTransientParent(false)
    , m_alertRequest(NoAlertRequest)
    , m_drawContentBorderGradient(false)
    , m_topContentBorderThickness(0)
    , m_bottomContentBorderThickness(0)
{
    qCDebug(lcQpaWindow) << "QCocoaWindow::QCocoaWindow" << window();

    if (nativeHandle) {
        m_view = reinterpret_cast<NSView *>(nativeHandle);
        [m_view retain];
    }
}

void QCocoaWindow::initialize()
{
    qCDebug(lcQpaWindow) << "QCocoaWindow::initialize" << window();

    QMacAutoReleasePool pool;

    if (!m_view)
        m_view = [[QNSView alloc] initWithCocoaWindow:this];

    // Compute the initial geometry based on the geometry set on the
    // QWindow. This geometry has already been reflected to the
    // QPlatformWindow in the constructor, so to ensure that the
    // resulting setGeometry call does not think the geometry has
    // already been applied, we reset the QPlatformWindow's view
    // of the geometry first.
    auto initialGeometry = QPlatformWindow::initialGeometry(window(),
        windowGeometry(), defaultWindowWidth, defaultWindowHeight);
    QPlatformWindow::d_ptr->rect = QRect();
    setGeometry(initialGeometry);

    recreateWindowIfNeeded();

    m_initialized = true;
}

const NSNotificationName QCocoaWindowWillReleaseQNSViewNotification = @"QCocoaWindowWillReleaseQNSViewNotification";

QCocoaWindow::~QCocoaWindow()
{
    qCDebug(lcQpaWindow) << "QCocoaWindow::~QCocoaWindow" << window();

    QMacAutoReleasePool pool;
    [m_nsWindow makeFirstResponder:nil];
    [m_nsWindow setContentView:nil];
    if ([m_view superview])
        [m_view removeFromSuperview];

    // Make sure to disconnect observer in all case if view is valid
    // to avoid notifications received when deleting when using Qt::AA_NativeWindows attribute
    if (!isForeignWindow())
        [[NSNotificationCenter defaultCenter] removeObserver:m_view];

#if QT_CONFIG(vulkan)
    if (QCocoaIntegration *cocoaIntegration = QCocoaIntegration::instance()) {
        auto vulcanInstance = cocoaIntegration->getCocoaVulkanInstance();
        if (vulcanInstance)
            vulcanInstance->destroySurface(m_vulkanSurface);
    }
#endif

    // Must send notification before calling release, as doing it from
    // [QNSView dealloc] would mean that any weak references to the view
    // would already return nil.
    [NSNotificationCenter.defaultCenter
        postNotificationName:QCocoaWindowWillReleaseQNSViewNotification
        object:m_view];

    [m_view release];
    [m_nsWindow close];
    [m_nsWindow release];
}

QSurfaceFormat QCocoaWindow::format() const
{
    return window()->requestedFormat();
}

void QCocoaWindow::setGeometry(const QRect &rectIn)
{
    qCDebug(lcQpaWindow) << "QCocoaWindow::setGeometry" << window() << rectIn;

    QBoolBlocker inSetGeometry(m_inSetGeometry, true);

    QRect rect = rectIn;
    // This means it is a call from QWindow::setFramePosition() and
    // the coordinates include the frame (size is still the contents rectangle).
    if (qt_window_private(const_cast<QWindow *>(window()))->positionPolicy
            == QWindowPrivate::WindowFrameInclusive) {
        const QMargins margins = frameMargins();
        rect.moveTopLeft(rect.topLeft() + QPoint(margins.left(), margins.top()));
    }
    if (geometry() == rect)
        return;

    setCocoaGeometry(rect);
}

bool QCocoaWindow::isForeignWindow() const
{
    return ![m_view isKindOfClass:[QNSView class]];
}

QRect QCocoaWindow::geometry() const
{
    // QWindows that are embedded in a NSView hierarchy may be considered
    // top-level from Qt's point of view but are not from Cocoa's point
    // of view. Embedded QWindows get global (screen) geometry.
    if (isEmbedded()) {
        NSPoint windowPoint = [m_view convertPoint:NSMakePoint(0, 0) toView:nil];
        NSRect screenRect = [[m_view window] convertRectToScreen:NSMakeRect(windowPoint.x, windowPoint.y, 1, 1)];
        NSPoint screenPoint = screenRect.origin;
        QPoint position = QCocoaScreen::mapFromNative(screenPoint).toPoint();
        QSize size = QRectF::fromCGRect(NSRectToCGRect([m_view bounds])).toRect().size();
        return QRect(position, size);
    }

    return QPlatformWindow::geometry();
}

/*!
    \brief the geometry of the window as it will appear when shown as
    a normal (not maximized or full screen) top-level window.

    For child windows this property always holds an empty rectangle.

    \sa QWidget::normalGeometry()
*/
QRect QCocoaWindow::normalGeometry() const
{
    if (!isContentView())
        return QRect();

    // We only persist the normal the geometry when going into
    // fullscreen and maximized states. For all other cases we
    // can just report the geometry as is.

    if (!(windowState() & (Qt::WindowFullScreen | Qt::WindowMaximized)))
        return geometry();

    return m_normalGeometry;
}

void QCocoaWindow::updateNormalGeometry()
{
    if (!isContentView())
        return;

    if (windowState() != Qt::WindowNoState)
        return;

    m_normalGeometry = geometry();
}

void QCocoaWindow::setCocoaGeometry(const QRect &rect)
{
    qCDebug(lcQpaWindow) << "QCocoaWindow::setCocoaGeometry" << window() << rect;
    QMacAutoReleasePool pool;

    QPlatformWindow::setGeometry(rect);

    if (isEmbedded()) {
        if (!isForeignWindow()) {
            [m_view setFrame:NSMakeRect(0, 0, rect.width(), rect.height())];
        }
        return;
    }

    if (isContentView()) {
        NSRect bounds = QCocoaScreen::mapToNative(rect);
        [m_view.window setFrame:[m_view.window frameRectForContentRect:bounds] display:YES animate:NO];
    } else {
        [m_view setFrame:NSMakeRect(rect.x(), rect.y(), rect.width(), rect.height())];
    }

    // will call QPlatformWindow::setGeometry(rect) during resize confirmation (see qnsview.mm)
}

bool QCocoaWindow::startSystemMove()
{
    switch (NSApp.currentEvent.type) {
    case NSEventTypeLeftMouseDown:
    case NSEventTypeRightMouseDown:
    case NSEventTypeOtherMouseDown:
    case NSEventTypeMouseMoved:
    case NSEventTypeLeftMouseDragged:
    case NSEventTypeRightMouseDragged:
    case NSEventTypeOtherMouseDragged:
        // The documentation only describes starting a system move
        // based on mouse down events, but move events also work.
        [m_view.window performWindowDragWithEvent:NSApp.currentEvent];
        return true;
    default:
        return false;
    }
}

void QCocoaWindow::setVisible(bool visible)
{
    qCDebug(lcQpaWindow) << "QCocoaWindow::setVisible" << window() << visible;

    QScopedValueRollback<bool> rollback(m_inSetVisible, true);

    QMacAutoReleasePool pool;
    QCocoaWindow *parentCocoaWindow = nullptr;
    if (window()->transientParent())
        parentCocoaWindow = static_cast<QCocoaWindow *>(window()->transientParent()->handle());

    auto eventDispatcher = [] {
        return static_cast<QCocoaEventDispatcherPrivate *>(QObjectPrivate::get(qApp->eventDispatcher()));
    };

    if (visible) {
        // We need to recreate if the modality has changed as the style mask will need updating
        recreateWindowIfNeeded();

        // We didn't send geometry changes during creation, as that would have confused
        // Qt, which expects a show-event to be sent before any resize events. But now
        // that the window is made visible, we know that the show-event has been sent
        // so we can send the geometry change. FIXME: Get rid of this workaround.
        handleGeometryChange();

        if (parentCocoaWindow) {
            // The parent window might have moved while this window was hidden,
            // update the window geometry if there is a parent.
            setGeometry(windowGeometry());

            if (window()->type() == Qt::Popup) {
                // QTBUG-30266: a window should not be resizable while a transient popup is open
                // Since this isn't a native popup, the window manager doesn't close the popup when you click outside
                NSWindow *nativeParentWindow = parentCocoaWindow->nativeWindow();
                NSUInteger parentStyleMask = nativeParentWindow.styleMask;
                if ((m_resizableTransientParent = (parentStyleMask & NSWindowStyleMaskResizable))
                    && !(nativeParentWindow.styleMask & NSWindowStyleMaskFullScreen))
                    nativeParentWindow.styleMask &= ~NSWindowStyleMaskResizable;
            }

        }

        if (isContentView()) {
            QWindowSystemInterface::flushWindowSystemEvents(QEventLoop::ExcludeUserInputEvents);

            // setWindowState might have been called while the window was hidden and
            // will not change the NSWindow state in that case. Sync up here:
            applyWindowState(window()->windowStates());

            if (window()->windowState() != Qt::WindowMinimized) {
                if (parentCocoaWindow && (window()->modality() == Qt::WindowModal || window()->type() == Qt::Sheet)) {
                    // Show the window as a sheet
                    NSWindow *nativeParentWindow = parentCocoaWindow->nativeWindow();
                    if (!nativeParentWindow.attachedSheet)
                        [nativeParentWindow beginSheet:m_view.window completionHandler:nil];
                    else
                        [nativeParentWindow beginCriticalSheet:m_view.window completionHandler:nil];
                } else if (window()->modality() == Qt::ApplicationModal) {
                    // Show the window as application modal
                    eventDispatcher()->beginModalSession(window());
                } else if (m_view.window.canBecomeKeyWindow) {
                    bool shouldBecomeKeyNow = !NSApp.modalWindow
                                              || m_view.window.worksWhenModal
                                              || !NSApp.modalWindow.visible;

                    // Panels with becomesKeyOnlyIfNeeded set should not activate until a view
                    // with needsPanelToBecomeKey, for example a line edit, is clicked.
                    if ([m_view.window isKindOfClass:[NSPanel class]])
                        shouldBecomeKeyNow &= !(static_cast<NSPanel*>(m_view.window).becomesKeyOnlyIfNeeded);

                    if (shouldBecomeKeyNow)
                        [m_view.window makeKeyAndOrderFront:nil];
                    else
                        [m_view.window orderFront:nil];
                } else {
                    [m_view.window orderFront:nil];
                }
            }
        }

        // In some cases, e.g. QDockWidget, the content view is hidden before moving to its own
        // Cocoa window, and then shown again. Therefore, we test for the view being hidden even
        // if it's attached to an NSWindow.
        if ([m_view isHidden])
            [m_view setHidden:NO];

    } else {
        // Window not visible, hide it
        if (isContentView()) {
            if (eventDispatcher()->hasModalSession()) {
                eventDispatcher()->endModalSession(window());
            } else {
                if ([m_view.window isSheet]) {
                    Q_ASSERT_X(parentCocoaWindow, "QCocoaWindow", "Window modal dialog has no transient parent.");
                    [parentCocoaWindow->nativeWindow() endSheet:m_view.window];
                }
            }

            // Note: We do not guard the order out by checking NSWindow.visible, as AppKit will
            // in some cases, such as when hiding the application, order out and make a window
            // invisible, but keep it in a list of "hidden windows", that it then restores again
            // when the application is unhidden. We need to call orderOut explicitly, to bring
            // the window out of this "hidden list".
            [m_view.window orderOut:nil];

            if (m_view.window == [NSApp keyWindow] && !eventDispatcher()->hasModalSession()) {
                // Probably because we call runModalSession: outside [NSApp run] in QCocoaEventDispatcher
                // (e.g., when show()-ing a modal QDialog instead of exec()-ing it), it can happen that
                // the current NSWindow is still key after being ordered out. Then, after checking we
                // don't have any other modal session left, it's safe to make the main window key again.
                NSWindow *mainWindow = [NSApp mainWindow];
                if (mainWindow && [mainWindow canBecomeKeyWindow])
                    [mainWindow makeKeyWindow];
            }
        } else {
            [m_view setHidden:YES];
        }

        if (parentCocoaWindow && window()->type() == Qt::Popup) {
            NSWindow *nativeParentWindow = parentCocoaWindow->nativeWindow();
            if (m_resizableTransientParent
                && !(nativeParentWindow.styleMask & NSWindowStyleMaskFullScreen))
                // A window should not be resizable while a transient popup is open
                nativeParentWindow.styleMask |= NSWindowStyleMaskResizable;
        }
    }
}

NSInteger QCocoaWindow::windowLevel(Qt::WindowFlags flags)
{
    Qt::WindowType type = static_cast<Qt::WindowType>(int(flags & Qt::WindowType_Mask));

    NSInteger windowLevel = NSNormalWindowLevel;

    if (type == Qt::Tool)
        windowLevel = NSFloatingWindowLevel;
    else if ((type & Qt::Popup) == Qt::Popup)
        windowLevel = NSPopUpMenuWindowLevel;

    // StayOnTop window should appear above Tool windows.
    if (flags & Qt::WindowStaysOnTopHint)
        windowLevel = NSModalPanelWindowLevel;
    // Tooltips should appear above StayOnTop windows.
    if (type == Qt::ToolTip)
        windowLevel = NSScreenSaverWindowLevel;

    auto *transientParent = window()->transientParent();
    if (transientParent && transientParent->handle()) {
        // We try to keep windows in at least the same window level as
        // their transient parent. Unfortunately this only works when the
        // window is created. If the window level changes after that, as
        // a result of a call to setWindowFlags, or by changing the level
        // of the native window, we will not pick this up, and the window
        // will be left behind (or in a different window level than) its
        // parent. We could KVO-observe the window level of our transient
        // parent, but that requires us to know when the parent goes away
        // so that we can unregister the observation before the parent is
        // dealloced, something we can't do for generic NSWindows. Another
        // way would be to override [NSWindow setLevel:] and notify child
        // windows about the change, but that doesn't work for foreign
        // windows, which can still be transient parents via fromWinId().
        // One area where this problem is apparent is when AppKit tweaks
        // the window level of modal windows during application activation
        // and deactivation. Since we don't pick up on these window level
        // changes in a generic way, we need to add logic explicitly to
        // re-evaluate the window level after AppKit has done its tweaks.

        auto *transientCocoaWindow = static_cast<QCocoaWindow *>(transientParent->handle());
        auto *nsWindow = transientCocoaWindow->nativeWindow();

        // We only upgrade the window level for "special" windows, to work
        // around Qt Designer parenting the designer windows to the widget
        // palette window (QTBUG-31779). This should be fixed in designer.
        if (type != Qt::Window)
            windowLevel = qMax(windowLevel, nsWindow.level);
    }

    return windowLevel;
}

NSUInteger QCocoaWindow::windowStyleMask(Qt::WindowFlags flags)
{
    const Qt::WindowType type = static_cast<Qt::WindowType>(int(flags & Qt::WindowType_Mask));

    // Determine initial style mask based on whether the window should
    // have a frame and title or not. The NSWindowStyleMaskBorderless
    // and NSWindowStyleMaskTitled styles are mutually exclusive, with
    // values of 0 and 1 correspondingly.
    NSUInteger styleMask = [&]{
        // Honor explicit requests for borderless windows
        if (flags & Qt::FramelessWindowHint)
            return NSWindowStyleMaskBorderless;

        // Popup windows should always be borderless
        if (windowIsPopupType(type))
            return NSWindowStyleMaskBorderless;

        if (flags & Qt::CustomizeWindowHint) {
            // CustomizeWindowHint turns off the default window title hints,
            // so the choice is then up to the user via Qt::WindowTitleHint.
            return flags & Qt::WindowTitleHint
                ? NSWindowStyleMaskTitled
                : NSWindowStyleMaskBorderless;
        } else {
            // Otherwise, default to using titled windows
            return NSWindowStyleMaskTitled;
        }
    }();

    // We determine which buttons to show in updateTitleBarButtons,
    // so we can enable all the relevant style masks here to ensure
    // that behaviors that don't involve the title bar buttons are
    // working (for example minimizing frameless windows, or resizing
    // windows that don't have zoom or fullscreen titlebar buttons).
    styleMask |= NSWindowStyleMaskClosable
               | NSWindowStyleMaskResizable
               | NSWindowStyleMaskMiniaturizable;

    if (type == Qt::Tool)
        styleMask |= NSWindowStyleMaskUtilityWindow;

    // FIXME: Remove use of deprecated style mask
    if (m_drawContentBorderGradient)
        styleMask |= NSWindowStyleMaskTexturedBackground;

    // Don't wipe existing states
    if (m_view.window.styleMask & NSWindowStyleMaskFullScreen)
        styleMask |= NSWindowStyleMaskFullScreen;
    if (m_view.window.styleMask & NSWindowStyleMaskFullSizeContentView)
        styleMask |= NSWindowStyleMaskFullSizeContentView;

    return styleMask;
}

bool QCocoaWindow::isFixedSize() const
{
    return windowMinimumSize().isValid() && windowMaximumSize().isValid()
        && windowMinimumSize() == windowMaximumSize();
}

void QCocoaWindow::updateTitleBarButtons(Qt::WindowFlags windowFlags)
{
    if (!isContentView())
        return;

    NSWindow *window = m_view.window;

    static constexpr std::pair<NSWindowButton, Qt::WindowFlags> buttons[] = {
        { NSWindowCloseButton, Qt::WindowCloseButtonHint },
        { NSWindowMiniaturizeButton, Qt::WindowMinimizeButtonHint},
        { NSWindowZoomButton, Qt::WindowMaximizeButtonHint | Qt::WindowFullscreenButtonHint }
    };

    bool hideButtons = true;
    for (const auto &[button, buttonHint] : buttons) {
        bool enabled = true;
        if (windowFlags & Qt::CustomizeWindowHint)
            enabled = windowFlags & buttonHint;

        if (button == NSWindowZoomButton && isFixedSize())
            enabled = false;

        [window standardWindowButton:button].enabled = enabled;
        hideButtons &= !enabled;
    }

    // Hide buttons in case we disabled all of them
    for (const auto &[button, buttonHint] : buttons)
        [window standardWindowButton:button].hidden = hideButtons;
}

void QCocoaWindow::setWindowFlags(Qt::WindowFlags flags)
{
    // Updating the window flags may affect the window's theme frame, which
    // in the process retains and then autoreleases the NSWindow. To make
    // sure this doesn't leave lingering releases when there is no pool in
    // place (e.g. during main(), before exec), we add one locally here.
    QMacAutoReleasePool pool;

    if (!isContentView())
        return;

    // While setting style mask we can have handleGeometryChange calls on a content
    // view with null geometry, reporting an invalid coordinates as a result.
    m_inSetStyleMask = true;
    m_view.window.styleMask = windowStyleMask(flags);
    m_inSetStyleMask = false;

    Qt::WindowType type = static_cast<Qt::WindowType>(int(flags & Qt::WindowType_Mask));
    if ((type & Qt::Popup) != Qt::Popup && (type & Qt::Dialog) != Qt::Dialog) {
        NSWindowCollectionBehavior behavior = m_view.window.collectionBehavior;
        const bool enableFullScreen = m_view.window.qt_fullScreen
                                    || !(flags & Qt::CustomizeWindowHint)
                                    || (flags & Qt::WindowFullscreenButtonHint);
        if (enableFullScreen) {
            behavior |= NSWindowCollectionBehaviorFullScreenPrimary;
            behavior &= ~NSWindowCollectionBehaviorFullScreenAuxiliary;
        } else {
            behavior |= NSWindowCollectionBehaviorFullScreenAuxiliary;
            behavior &= ~NSWindowCollectionBehaviorFullScreenPrimary;
        }
        m_view.window.collectionBehavior = behavior;
    }

    // Set styleMask and collectionBehavior before applying window level, as
    // the window level change will trigger verification of the two properties.
    m_view.window.level = this->windowLevel(flags);

    m_view.window.hasShadow = !(flags & Qt::NoDropShadowWindowHint);

    if (!(flags & Qt::FramelessWindowHint))
        setWindowTitle(window()->title());

    updateTitleBarButtons(flags);

    // Make window ignore mouse events if WindowTransparentForInput is set.
    // Note that ignoresMouseEvents has a special initial state where events
    // are ignored (passed through) based on window transparency, and that
    // setting the property to false does not return us to that state. Instead,
    // this makes the window capture all mouse events. Take care to only
    // set the property if needed. FIXME: recreate window if needed or find
    // some other way to implement WindowTransparentForInput.
    bool ignoreMouse = flags & Qt::WindowTransparentForInput;
    if (m_view.window.ignoresMouseEvents != ignoreMouse)
        m_view.window.ignoresMouseEvents = ignoreMouse;
}

// ----------------------- Window state -----------------------

/*!
    Changes the state of the NSWindow, going in/out of minimize/zoomed/fullscreen

    When this is called from QWindow::setWindowState(), the QWindow state has not been
    updated yet, so window()->windowState() will reflect the previous state that was
    reported to QtGui.
*/
void QCocoaWindow::setWindowState(Qt::WindowStates state)
{
    if (window()->isVisible())
        applyWindowState(state); // Window state set for hidden windows take effect when show() is called
}

void QCocoaWindow::applyWindowState(Qt::WindowStates requestedState)
{
    if (!isContentView())
        return;

    const Qt::WindowState currentState = windowState();
    const Qt::WindowState newState = QWindowPrivate::effectiveState(requestedState);

    if (newState == currentState)
        return;

    qCDebug(lcQpaWindow) << "Applying" << newState << "to" << window() << "in" << currentState;

    const NSSize contentSize = m_view.frame.size;
    if (contentSize.width <= 0 || contentSize.height <= 0) {
        // If content view width or height is 0 then the window animations will crash so
        // do nothing. We report the current state back to reflect the failed operation.
        qWarning("invalid window content view size, check your window geometry");
        handleWindowStateChanged(HandleUnconditionally);
        return;
    }

    const NSWindow *nsWindow = m_view.window;

    if (nsWindow.styleMask & NSWindowStyleMaskUtilityWindow
        && newState & (Qt::WindowMinimized | Qt::WindowFullScreen)) {
        qWarning() << window()->type() << "windows cannot be made" << newState;
        handleWindowStateChanged(HandleUnconditionally);
        return;
    }

    const id sender = nsWindow;

    // First we need to exit states that can't transition directly to other states
    switch (currentState) {
    case Qt::WindowMinimized:
        [nsWindow deminiaturize:sender];
        Q_ASSERT_X(windowState() != Qt::WindowMinimized, "QCocoaWindow",
            "[NSWindow deminiaturize:] is synchronous");
        break;
    case Qt::WindowFullScreen: {
        toggleFullScreen();
        // Exiting fullscreen is not synchronous, so we need to wait for the
        // NSWindowDidExitFullScreenNotification before continuing to apply
        // the new state.
        return;
    }
    default:;
    }

    // Then we apply the new state if needed
    if (newState == windowState())
        return;

    switch (newState) {
    case Qt::WindowFullScreen:
        toggleFullScreen();
        break;
    case Qt::WindowMaximized:
        toggleMaximized();
        break;
    case Qt::WindowMinimized:
        [nsWindow miniaturize:sender];
        break;
    case Qt::WindowNoState:
        if (windowState() == Qt::WindowMaximized)
            toggleMaximized();
        break;
    default:
        Q_UNREACHABLE();
    }
}

Qt::WindowState QCocoaWindow::windowState() const
{
    // FIXME: Support compound states (Qt::WindowStates)

    NSWindow *window = m_view.window;
    if (window.miniaturized)
        return Qt::WindowMinimized;
    if (window.qt_fullScreen)
        return Qt::WindowFullScreen;
    if ((window.zoomed && !isTransitioningToFullScreen())
        || (m_lastReportedWindowState == Qt::WindowMaximized && isTransitioningToFullScreen()))
        return Qt::WindowMaximized;

    // Note: We do not report Qt::WindowActive, even if isActive()
    // is true, as QtGui does not expect this window state to be set.

    return Qt::WindowNoState;
}

void QCocoaWindow::toggleMaximized()
{
    const NSWindow *window = m_view.window;

    // The NSWindow needs to be resizable, otherwise the window will
    // not be possible to zoom back to non-zoomed state.
    const bool wasResizable = window.styleMask & NSWindowStyleMaskResizable;
    window.styleMask |= NSWindowStyleMaskResizable;

    const id sender = window;
    [window zoom:sender];

    if (!wasResizable)
        window.styleMask &= ~NSWindowStyleMaskResizable;
}

void QCocoaWindow::windowWillZoom()
{
    updateNormalGeometry();
}

void QCocoaWindow::toggleFullScreen()
{
    const NSWindow *window = m_view.window;

    // The window needs to have the correct collection behavior for the
    // toggleFullScreen call to have an effect. The collection behavior
    // will be reset in windowDidEnterFullScreen/windowDidLeaveFullScreen.
    window.collectionBehavior |= NSWindowCollectionBehaviorFullScreenPrimary;

    const id sender = window;
    [window toggleFullScreen:sender];
}

void QCocoaWindow::windowWillEnterFullScreen()
{
    if (!isContentView())
        return;

    updateNormalGeometry();

    // The NSWindow needs to be resizable, otherwise we'll end up with
    // the normal window geometry, centered in the middle of the screen
    // on a black background. The styleMask will be reset below.
    m_view.window.styleMask |= NSWindowStyleMaskResizable;
}

bool QCocoaWindow::isTransitioningToFullScreen() const
{
    NSWindow *window = m_view.window;
    return window.styleMask & NSWindowStyleMaskFullScreen && !window.qt_fullScreen;
}

void QCocoaWindow::windowDidEnterFullScreen()
{
    if (!isContentView())
        return;

    Q_ASSERT_X(m_view.window.qt_fullScreen, "QCocoaWindow",
        "FullScreen category processes window notifications first");

    // Reset to original styleMask
    setWindowFlags(window()->flags());

    handleWindowStateChanged();
}

void QCocoaWindow::windowWillExitFullScreen()
{
    if (!isContentView())
        return;

    // The NSWindow needs to be resizable, otherwise we'll end up with
    // a weird zoom animation. The styleMask will be reset below.
    m_view.window.styleMask |= NSWindowStyleMaskResizable;
}

void QCocoaWindow::windowDidExitFullScreen()
{
    if (!isContentView())
        return;

    Q_ASSERT_X(!m_view.window.qt_fullScreen, "QCocoaWindow",
        "FullScreen category processes window notifications first");

    // Reset to original styleMask
    setWindowFlags(window()->flags());

    Qt::WindowState requestedState = window()->windowState();

    // Deliver update of QWindow state
    handleWindowStateChanged();

    if (requestedState != windowState() && requestedState != Qt::WindowFullScreen) {
        // We were only going out of full screen as an intermediate step before
        // progressing into the final step, so re-sync the desired state.
       applyWindowState(requestedState);
    }
}

void QCocoaWindow::windowDidMiniaturize()
{
    if (!isContentView())
        return;

    handleWindowStateChanged();
}

void QCocoaWindow::windowDidDeminiaturize()
{
    if (!isContentView())
        return;

    handleWindowStateChanged();
}

void QCocoaWindow::handleWindowStateChanged(HandleFlags flags)
{
    Qt::WindowState currentState = windowState();
    if (!(flags & HandleUnconditionally) && currentState == m_lastReportedWindowState)
        return;

    qCDebug(lcQpaWindow) << "QCocoaWindow::handleWindowStateChanged" <<
        m_lastReportedWindowState << "-->" << currentState;

    QWindowSystemInterface::handleWindowStateChanged<QWindowSystemInterface::SynchronousDelivery>(
        window(), currentState, m_lastReportedWindowState);
    m_lastReportedWindowState = currentState;
}

// ------------------------------------------------------------

void QCocoaWindow::setWindowTitle(const QString &title)
{
    if (!isContentView())
        return;

    QMacAutoReleasePool pool;
    m_view.window.title = title.toNSString();

    if (title.isEmpty() && !window()->filePath().isEmpty()) {
        // Clearing the title should restore the default filename
        setWindowFilePath(window()->filePath());
    }
}

void QCocoaWindow::setWindowFilePath(const QString &filePath)
{
    if (!isContentView())
        return;

    QMacAutoReleasePool pool;

    if (window()->title().isNull())
        [m_view.window setTitleWithRepresentedFilename:filePath.toNSString()];
    else
        m_view.window.representedFilename = filePath.toNSString();

    // Changing the file path may affect icon visibility
    setWindowIcon(window()->icon());
}

void QCocoaWindow::setWindowIcon(const QIcon &icon)
{
    if (!isContentView())
        return;

    NSButton *iconButton = [m_view.window standardWindowButton:NSWindowDocumentIconButton];
    if (!iconButton) {
        // Window icons are only supported on macOS in combination with a document filePath
        return;
    }

    QMacAutoReleasePool pool;

    if (icon.isNull()) {
        iconButton.image = [NSWorkspace.sharedWorkspace iconForFile:m_view.window.representedFilename];
    } else {
        // Fall back to a size that looks good on the highest resolution screen available
        auto fallbackSize = iconButton.frame.size.height * qGuiApp->devicePixelRatio();
        iconButton.image = [NSImage imageFromQIcon:icon withSize:fallbackSize];
    }
}

void QCocoaWindow::setAlertState(bool enabled)
{
    if (m_alertRequest == NoAlertRequest && enabled) {
        m_alertRequest = [NSApp requestUserAttention:NSCriticalRequest];
    } else if (m_alertRequest != NoAlertRequest && !enabled) {
        [NSApp cancelUserAttentionRequest:m_alertRequest];
        m_alertRequest = NoAlertRequest;
    }
}

bool QCocoaWindow::isAlertState() const
{
    return m_alertRequest != NoAlertRequest;
}

void QCocoaWindow::raise()
{
    qCDebug(lcQpaWindow) << "QCocoaWindow::raise" << window();

    // ### handle spaces (see Qt 4 raise_sys in qwidget_mac.mm)
    if (isContentView()) {
        if (m_view.window.visible) {
            {
                // Clean up auto-released temp objects from orderFront immediately.
                // Failure to do so has been observed to cause leaks also beyond any outer
                // autorelease pool (for example around a complete QWindow
                // construct-show-raise-hide-delete cycle), counter to expected autoreleasepool
                // behavior.
                QMacAutoReleasePool pool;
                [m_view.window orderFront:m_view.window];
            }
            static bool raiseProcess = qt_mac_resolveOption(true, "QT_MAC_SET_RAISE_PROCESS");
            if (raiseProcess)
                [NSApp activateIgnoringOtherApps:YES];
        }
    } else {
        [m_view.superview addSubview:m_view positioned:NSWindowAbove relativeTo:nil];
    }
}

void QCocoaWindow::lower()
{
    qCDebug(lcQpaWindow) << "QCocoaWindow::lower" << window();

    if (isContentView()) {
        if (m_view.window.visible)
            [m_view.window orderBack:m_view.window];
    } else {
        [m_view.superview addSubview:m_view positioned:NSWindowBelow relativeTo:nil];
    }
}

bool QCocoaWindow::isExposed() const
{
    return !m_exposedRect.isEmpty();
}

bool QCocoaWindow::isEmbedded() const
{
    // Child QWindows are not embedded
    if (window()->parent())
        return false;

    // Top-level QWindows with non-Qt NSWindows are embedded
    if (m_view.window)
        return !([m_view.window isKindOfClass:[QNSWindow class]] ||
                 [m_view.window isKindOfClass:[QNSPanel class]]);

    // The window has no QWindow parent but also no NSWindow,
    // conservatively reuturn false.
    return false;
}

bool QCocoaWindow::isOpaque() const
{
    // OpenGL surfaces can be ordered either above(default) or below the NSWindow.
    // When ordering below the window must be tranclucent.
    static GLint openglSourfaceOrder = qt_mac_resolveOption(1, "QT_MAC_OPENGL_SURFACE_ORDER");

    bool translucent = window()->format().alphaBufferSize() > 0
                        || window()->opacity() < 1
                        || !window()->mask().isEmpty()
                        || (surface()->supportsOpenGL() && openglSourfaceOrder == -1);
    return !translucent;
}

void QCocoaWindow::propagateSizeHints()
{
    QMacAutoReleasePool pool;
    if (!isContentView())
        return;

    qCDebug(lcQpaWindow) << "QCocoaWindow::propagateSizeHints" << window()
                              << "min:" << windowMinimumSize() << "max:" << windowMaximumSize()
                              << "increment:" << windowSizeIncrement()
                              << "base:" << windowBaseSize();

    const NSWindow *window = m_view.window;

    // Set the minimum content size.
    QSize minimumSize = windowMinimumSize();
    if (!minimumSize.isValid()) // minimumSize is (-1, -1) when not set. Make that (0, 0) for Cocoa.
        minimumSize = QSize(0, 0);
    window.contentMinSize = NSSizeFromCGSize(minimumSize.toCGSize());

    // Set the maximum content size.
    window.contentMaxSize = NSSizeFromCGSize(windowMaximumSize().toCGSize());

    // The window may end up with a fixed size; in this case the zoom button should be disabled.
    updateTitleBarButtons(this->window()->flags());

    // sizeIncrement is observed to take values of (-1, -1) and (0, 0) for windows that should be
    // resizable and that have no specific size increment set. Cocoa expects (1.0, 1.0) in this case.
    QSize sizeIncrement = windowSizeIncrement();
    if (sizeIncrement.isEmpty())
        sizeIncrement = QSize(1, 1);
    window.resizeIncrements = NSSizeFromCGSize(sizeIncrement.toCGSize());

    QRect rect = geometry();
    QSize baseSize = windowBaseSize();
    if (!baseSize.isNull() && baseSize.isValid())
        [window setFrame:NSMakeRect(rect.x(), rect.y(), baseSize.width(), baseSize.height()) display:YES];
}

void QCocoaWindow::setOpacity(qreal level)
{
    qCDebug(lcQpaWindow) << "QCocoaWindow::setOpacity" << level;
    if (!isContentView())
        return;

    m_view.window.alphaValue = level;
}

void QCocoaWindow::setMask(const QRegion &region)
{
    qCDebug(lcQpaWindow) << "QCocoaWindow::setMask" << window() << region;

    if (!region.isEmpty()) {
        QCFType<CGMutablePathRef> maskPath = CGPathCreateMutable();
        for (const QRect &r : region)
            CGPathAddRect(maskPath, nullptr, r.toCGRect());
        CAShapeLayer *maskLayer = [CAShapeLayer layer];
        maskLayer.path = maskPath;
        m_view.layer.mask = maskLayer;
    } else {
        m_view.layer.mask = nil;
    }
}

bool QCocoaWindow::setKeyboardGrabEnabled(bool grab)
{
    qCDebug(lcQpaWindow) << "QCocoaWindow::setKeyboardGrabEnabled" << window() << grab;
    if (!isContentView())
        return false;

    if (grab && ![m_view.window isKeyWindow])
        [m_view.window makeKeyWindow];

    return true;
}

bool QCocoaWindow::setMouseGrabEnabled(bool grab)
{
    qCDebug(lcQpaWindow) << "QCocoaWindow::setMouseGrabEnabled" << window() << grab;
    if (!isContentView())
        return false;

    if (grab && ![m_view.window isKeyWindow])
        [m_view.window makeKeyWindow];

    return true;
}

WId QCocoaWindow::winId() const
{
    return WId(m_view);
}

void QCocoaWindow::setParent(const QPlatformWindow *parentWindow)
{
    qCDebug(lcQpaWindow) << "QCocoaWindow::setParent" << window() << (parentWindow ? parentWindow->window() : 0);

    // Recreate in case we need to get rid of a NSWindow, or create one
    recreateWindowIfNeeded();

    setCocoaGeometry(geometry());
}

NSView *QCocoaWindow::view() const
{
    return m_view;
}

NSWindow *QCocoaWindow::nativeWindow() const
{
    return m_view.window;
}

void QCocoaWindow::setEmbeddedInForeignView()
{
    // Release any previously created NSWindow.
    [m_nsWindow closeAndRelease];
    m_nsWindow = 0;
}

// ----------------------- NSView notifications -----------------------

void QCocoaWindow::viewDidChangeFrame()
{
    // Note: When the view is the content view, it would seem redundant
    // to deliver geometry changes both from windowDidResize and this
    // callback, but in some cases such as when macOS native tabbed
    // windows are enabled we may end up with the wrong geometry in
    // the initial windowDidResize callback when a new tab is created.
    handleGeometryChange();
}

/*!
    Callback for NSViewGlobalFrameDidChangeNotification.

    Posted whenever an NSView object that has attached surfaces (that is,
    NSOpenGLContext objects) moves to a different screen, or other cases
    where the NSOpenGLContext object needs to be updated.
*/
void QCocoaWindow::viewDidChangeGlobalFrame()
{
    [m_view setNeedsDisplay:YES];
}

// ----------------------- NSWindow notifications -----------------------

// Note: The following notifications are delivered to every QCocoaWindow
// that is a child of the NSWindow that triggered the notification. Each
// callback should make sure to filter out notifications if they do not
// apply to that QCocoaWindow, e.g. if the window is not a content view.

void QCocoaWindow::windowDidMove()
{
    if (!isContentView())
        return;

    handleGeometryChange();

    // Moving a window might bring it out of maximized state
    handleWindowStateChanged();
}

void QCocoaWindow::windowDidResize()
{
    if (!isContentView())
        return;

    handleGeometryChange();

    if (!m_view.inLiveResize)
        handleWindowStateChanged();
}

void QCocoaWindow::windowDidEndLiveResize()
{
    if (!isContentView())
        return;

    handleWindowStateChanged();
}

void QCocoaWindow::windowDidBecomeKey()
{
    if (!isContentView())
        return;

    if (isForeignWindow())
        return;

    QNSView *firstResponderView = qt_objc_cast<QNSView *>(m_view.window.firstResponder);
    if (!firstResponderView)
        return;

    const QCocoaWindow *focusCocoaWindow = firstResponderView.platformWindow;
    if (focusCocoaWindow->windowIsPopupType())
        return;

    // See also [QNSView becomeFirstResponder]
    QWindowSystemInterface::handleWindowActivated<QWindowSystemInterface::SynchronousDelivery>(
                focusCocoaWindow->window(), Qt::ActiveWindowFocusReason);
}

void QCocoaWindow::windowDidResignKey()
{
    if (!isContentView())
        return;

    if (isForeignWindow())
        return;

    // Make sure popups are closed before we deliver activation changes, which are
    // otherwise ignored by QApplication.
    QGuiApplicationPrivate::instance()->closeAllPopups();

    // The current key window will be non-nil if another window became key. If that
    // window is a Qt window, we delay the window activation event until the didBecomeKey
    // notification is delivered to the active window, to ensure an atomic update.
    NSWindow *newKeyWindow = [NSApp keyWindow];
    if (newKeyWindow && newKeyWindow != m_view.window
        && [newKeyWindow conformsToProtocol:@protocol(QNSWindowProtocol)]) {
        return;
    }

    // Lost key window, go ahead and set the active window to zero
    if (!windowIsPopupType()) {
        QWindowSystemInterface::handleWindowActivated<QWindowSystemInterface::SynchronousDelivery>(
            nullptr, Qt::ActiveWindowFocusReason);
    }
}

void QCocoaWindow::windowDidOrderOnScreen()
{
    // The current mouse window needs to get a leave event when a popup window opens.
    // For modal dialogs, QGuiApplicationPrivate::showModalWindow takes care of this.
    if (QWindowPrivate::get(window())->isPopup()) {
        QWindowSystemInterface::handleLeaveEvent<QWindowSystemInterface::SynchronousDelivery>
            (QGuiApplicationPrivate::currentMouseWindow);
    }

    [m_view setNeedsDisplay:YES];
}

void QCocoaWindow::windowDidOrderOffScreen()
{
    handleExposeEvent(QRegion());
    // We are closing a window, so the window that is now under the mouse
    // might need to get an Enter event if it isn't already the mouse window.
    if (window()->type() & Qt::Window) {
        const QPointF screenPoint = QCocoaScreen::mapFromNative([NSEvent mouseLocation]);
        if (QWindow *windowUnderMouse = QGuiApplication::topLevelAt(screenPoint.toPoint())) {
            if (windowUnderMouse != QGuiApplicationPrivate::instance()->currentMouseWindow) {
                const auto windowPoint = windowUnderMouse->mapFromGlobal(screenPoint);
                // asynchronous delivery on purpose
                QWindowSystemInterface::handleEnterEvent<QWindowSystemInterface::AsynchronousDelivery>
                    (windowUnderMouse, windowPoint, screenPoint);
            }
        }
    }
}

void QCocoaWindow::windowDidChangeOcclusionState()
{
    bool visible = m_view.window.occlusionState & NSWindowOcclusionStateVisible;
    qCDebug(lcQpaWindow) << "QCocoaWindow::windowDidChangeOcclusionState" << window() << "is now" << (visible ? "visible" : "occluded");
    if (visible)
        [m_view setNeedsDisplay:YES];
    else
        handleExposeEvent(QRegion());
}

void QCocoaWindow::windowDidChangeScreen()
{
    if (!window())
        return;

    // Note: When a window is resized to 0x0 Cocoa will report the window's screen as nil
    NSScreen *nsScreen = m_view.window.screen;

    qCDebug(lcQpaWindow) << window() << "did change" << nsScreen;
    QCocoaScreen::updateScreens();

    auto *previousScreen = static_cast<QCocoaScreen*>(screen());
    auto *currentScreen = QCocoaScreen::get(nsScreen);

    qCDebug(lcQpaWindow) << "Screen changed for" << window() << "from" << previousScreen << "to" << currentScreen;

    // Note: The previous screen may be the same as the current screen, either because
    // a) the screen was just reconfigured, which still results in AppKit sending an
    // NSWindowDidChangeScreenNotification, b) because the previous screen was removed,
    // and we ended up calling QWindow::setScreen to move the window, which doesn't
    // actually move the window to the new screen, or c) because we've delivered the
    // screen change to the top level window, which will make all the child windows
    // of that window report the new screen when requested via QWindow::screen().
    // We still need to deliver the screen change in all these cases, as the
    // device-pixel ratio may have changed, and needs to be delivered to all
    // windows, both top level and child windows.

    QWindowSystemInterface::handleWindowScreenChanged<QWindowSystemInterface::SynchronousDelivery>(
        window(), currentScreen ? currentScreen->screen() : nullptr);

    if (currentScreen && hasPendingUpdateRequest()) {
        // Restart display-link on new screen. We need to do this unconditionally,
        // since we can't rely on the previousScreen reflecting whether or not the
        // window actually moved from one screen to another, or just stayed on the
        // same screen.
        currentScreen->requestUpdate();
    }
}

// ----------------------- NSWindowDelegate callbacks -----------------------

bool QCocoaWindow::windowShouldClose()
{
    qCDebug(lcQpaWindow) << "QCocoaWindow::windowShouldClose" << window();

    // This callback should technically only determine if the window
    // should (be allowed to) close, but since our QPA API to determine
    // that also involves actually closing the window we do both at the
    // same time, instead of doing the latter in windowWillClose.

    // If the window is closed, we will release and deallocate the NSWindow.
    // But frames higher up in the stack might still expect the window to
    // be alive, since the windowShouldClose: callback is technically only
    // supposed to answer YES or NO. To ensure the window is still alive
    // we put an autorelease in the closest pool (typically the runloop).
    [[m_view.window retain] autorelease];

    return QWindowSystemInterface::handleCloseEvent<QWindowSystemInterface::SynchronousDelivery>(window());
}

// ----------------------------- QPA forwarding -----------------------------

void QCocoaWindow::handleGeometryChange()
{
    // Prevent geometry change during initialization, as that will result
    // in a resize event, and Qt expects those to come after the show event.
    // FIXME: Remove once we've clarified the Qt behavior for this.
    if (!m_initialized)
        return;

    // It can happen that the current NSWindow is nil (if we are changing styleMask
    // from/to borderless, and the content view is being re-parented), which results
    // in invalid coordinates.
    if (m_inSetStyleMask && !m_view.window)
        return;

    QRect newGeometry;
    if (isContentView() && !isEmbedded()) {
        // Content views are positioned at (0, 0) in the window, so we resolve via the window
        CGRect contentRect = [m_view.window contentRectForFrameRect:m_view.window.frame];

        // The result above is in native screen coordinates, so remap to the Qt coordinate system
        newGeometry = QCocoaScreen::mapFromNative(contentRect).toRect();
    } else {
        // QNSView has isFlipped set, so no need to remap the geometry
        newGeometry = QRectF::fromCGRect(m_view.frame).toRect();
    }

    qCDebug(lcQpaWindow) << "QCocoaWindow::handleGeometryChange" << window()
                               << "current" << geometry() << "new" << newGeometry;

    QWindowSystemInterface::handleGeometryChange(window(), newGeometry);

    // Guard against processing window system events during QWindow::setGeometry
    // calls, which Qt and Qt applications do not expect.
    if (!m_inSetGeometry)
        QWindowSystemInterface::flushWindowSystemEvents(QEventLoop::ExcludeUserInputEvents | QEventLoop::ExcludeSocketNotifiers);
}

void QCocoaWindow::handleExposeEvent(const QRegion &region)
{
    // Ideally we'd implement isExposed() in terms of these properties,
    // plus the occlusionState of the NSWindow, and let the expose event
    // pull the exposed state out when needed. However, when the window
    // is first shown we receive a drawRect call where the occlusionState
    // of the window is still hidden, but we still want to prepare the
    // window for display by issuing an expose event to Qt. To work around
    // this we don't use the occlusionState directly, but instead base
    // the exposed state on the region we get in, which in the case of
    // a window being obscured is an empty region, and in the case of
    // a drawRect call is a non-null region, even if occlusionState
    // is still hidden. This ensures the window is prepared for display.
    if (m_view.window.visible && m_view.window.screen
            && !geometry().size().isEmpty() && !region.isEmpty()
            && !m_view.hiddenOrHasHiddenAncestor) {
        m_exposedRect = region.boundingRect();
    } else {
        m_exposedRect = QRect();
    }

    qCDebug(lcQpaDrawing) << "QCocoaWindow::handleExposeEvent" << window() << region << "isExposed" << isExposed();
    QWindowSystemInterface::handleExposeEvent<QWindowSystemInterface::SynchronousDelivery>(window(), region);
}

// --------------------------------------------------------------------------

bool QCocoaWindow::windowIsPopupType(Qt::WindowType type) const
{
    if (type == Qt::Widget)
        type = window()->type();
    if (type == Qt::Tool)
        return false; // Qt::Tool has the Popup bit set but isn't, at least on Mac.

    return ((type & Qt::Popup) == Qt::Popup);
}

/*!
    Checks if the window is the content view of its immediate NSWindow.

    Being the content view of a NSWindow means the QWindow is
    the highest accessible NSView object in the window's view
    hierarchy.

    This is the case if the QWindow is a top level window.
*/
bool QCocoaWindow::isContentView() const
{
    return m_view.window.contentView == m_view;
}

/*!
    Recreates (or removes) the NSWindow for this QWindow, if needed.

    A QWindow may need a corresponding NSWindow/NSPanel, depending on
    whether or not it's a top level or not, window flags, etc.
*/
void QCocoaWindow::recreateWindowIfNeeded()
{
    QMacAutoReleasePool pool;

    QPlatformWindow *parentWindow = QPlatformWindow::parent();

    const bool isEmbeddedView = isEmbedded();
    RecreationReasons recreateReason = RecreationNotNeeded;

    QCocoaWindow *oldParentCocoaWindow = nullptr;
    if (QNSView *qnsView = qnsview_cast(m_view.superview))
        oldParentCocoaWindow = qnsView.platformWindow;

    if (parentWindow != oldParentCocoaWindow)
         recreateReason |= ParentChanged;

    if (!m_view.window)
        recreateReason |= MissingWindow;

    // If the modality has changed the style mask will need updating
    if (m_windowModality != window()->modality())
        recreateReason |= WindowModalityChanged;

    Qt::WindowType type = window()->type();

    const bool shouldBeContentView = !parentWindow
        && !((type & Qt::SubWindow) == Qt::SubWindow)
        && !isEmbeddedView;
    if (isContentView() != shouldBeContentView)
        recreateReason |= ContentViewChanged;

    const bool isPanel = isContentView() && [m_view.window isKindOfClass:[QNSPanel class]];
    const bool shouldBePanel = shouldBeContentView &&
        ((type & Qt::Popup) == Qt::Popup || (type & Qt::Dialog) == Qt::Dialog);

    if (isPanel != shouldBePanel)
         recreateReason |= PanelChanged;

    qCDebug(lcQpaWindow) << "QCocoaWindow::recreateWindowIfNeeded" << window() << recreateReason;

    if (recreateReason == RecreationNotNeeded)
        return;

    QCocoaWindow *parentCocoaWindow = static_cast<QCocoaWindow *>(parentWindow);

    // Remove current window (if any)
    if ((isContentView() && !shouldBeContentView) || (recreateReason & PanelChanged)) {
        if (m_nsWindow) {
            qCDebug(lcQpaWindow) << "Getting rid of existing window" << m_nsWindow;
            [m_nsWindow closeAndRelease];
            if (isContentView() && !isEmbeddedView) {
                // We explicitly disassociate m_view from the window's contentView,
                // as AppKit does not automatically do this in response to removing
                // the view from the NSThemeFrame subview list, so we might end up
                // with a NSWindow contentView pointing to a deallocated NSView.
                m_view.window.contentView = nil;
            }
            m_nsWindow = nil;
        }
    }

    if (shouldBeContentView && !m_nsWindow) {
        // Move view to new NSWindow if needed
        if (auto *newWindow = createNSWindow(shouldBePanel)) {
            qCDebug(lcQpaWindow) << "Ensuring that" << m_view << "is content view for" << newWindow;
            [m_view setPostsFrameChangedNotifications:NO];
            [newWindow setContentView:m_view];
            [m_view setPostsFrameChangedNotifications:YES];

            m_nsWindow = newWindow;
            Q_ASSERT(m_view.window == m_nsWindow);
        }
    }

    if (isEmbeddedView) {
        // An embedded window doesn't have its own NSWindow.
    } else if (!parentWindow) {
        // QPlatformWindow subclasses must sync up with QWindow on creation:
        propagateSizeHints();
        setWindowFlags(window()->flags());
        setWindowTitle(window()->title());
        setWindowFilePath(window()->filePath()); // Also sets window icon
        setWindowState(window()->windowState());
    } else {
        // Child windows have no NSWindow, re-parent to superview instead
        [parentCocoaWindow->m_view addSubview:m_view];
        [m_view setHidden:!window()->isVisible()];
    }

    const qreal opacity = qt_window_private(window())->opacity;
    if (!qFuzzyCompare(opacity, qreal(1.0)))
        setOpacity(opacity);

    setMask(QHighDpi::toNativeLocalRegion(window()->mask(), window()));

    // top-level QWindows may have an attached NSToolBar, call
    // update function which will attach to the NSWindow.
    if (!parentWindow && !isEmbeddedView)
        updateNSToolbar();
}

void QCocoaWindow::requestUpdate()
{
    qCDebug(lcQpaDrawing) << "QCocoaWindow::requestUpdate" << window()
        << "using" << (updatesWithDisplayLink() ? "display-link" : "timer");

    if (updatesWithDisplayLink()) {
        static_cast<QCocoaScreen *>(screen())->requestUpdate();
    } else {
        // Fall back to the un-throttled timer-based callback
        QPlatformWindow::requestUpdate();
    }
}

bool QCocoaWindow::updatesWithDisplayLink() const
{
    // Update via CVDisplayLink if Vsync is enabled
    return format().swapInterval() != 0;
}

void QCocoaWindow::deliverUpdateRequest()
{
    qCDebug(lcQpaDrawing) << "Delivering update request to" << window();
    QPlatformWindow::deliverUpdateRequest();
}

void QCocoaWindow::requestActivateWindow()
{
    QMacAutoReleasePool pool;
    [m_view.window makeFirstResponder:m_view];
    [m_view.window makeKeyWindow];
}

QCocoaNSWindow *QCocoaWindow::createNSWindow(bool shouldBePanel)
{
    QMacAutoReleasePool pool;

    Qt::WindowType type = window()->type();
    Qt::WindowFlags flags = window()->flags();

    QRect rect = geometry();

    QScreen *targetScreen = nullptr;
    for (QScreen *screen : QGuiApplication::screens()) {
        if (screen->geometry().contains(rect.topLeft())) {
            targetScreen = screen;
            break;
        }
    }

    NSWindowStyleMask styleMask = windowStyleMask(flags);

    if (!targetScreen) {
        qCWarning(lcQpaWindow) << "Window position" << rect << "outside any known screen, using primary screen";
        targetScreen = QGuiApplication::primaryScreen();
        // Unless the window is created as borderless AppKit won't find a position and
        // screen that's close to the requested invalid position, and will always place
        // the window on the primary screen.
        styleMask = NSWindowStyleMaskBorderless;
    }

    rect.translate(-targetScreen->geometry().topLeft());
    auto *targetCocoaScreen = static_cast<QCocoaScreen *>(targetScreen->handle());
    NSRect contentRect = QCocoaScreen::mapToNative(rect, targetCocoaScreen);

    if (targetScreen->primaryOrientation() == Qt::PortraitOrientation) {
        // The macOS window manager has a bug, where if a screen is rotated, it will not allow
        // a window to be created within the area of the screen that has a Y coordinate (I quadrant)
        // higher than the height of the screen in its non-rotated state (including a magic padding
        // of 24 points), unless the window is created with the NSWindowStyleMaskBorderless style mask.
        if (styleMask && (contentRect.origin.y + 24 > targetScreen->geometry().width())) {
            qCDebug(lcQpaWindow) << "Window positioned on portrait screen."
                << "Adjusting style mask during creation";
            styleMask = NSWindowStyleMaskBorderless;
        }
    }

    // Create NSWindow
    Class windowClass = shouldBePanel ? [QNSPanel class] : [QNSWindow class];
    QCocoaNSWindow *nsWindow = [[windowClass alloc] initWithContentRect:contentRect
        // Mask will be updated in setWindowFlags if not the final mask
        styleMask:styleMask
        // Deferring window creation breaks OpenGL (the GL context is
        // set up before the window is shown and needs a proper window)
        backing:NSBackingStoreBuffered defer:NO
        screen:targetCocoaScreen->nativeScreen()
        platformWindow:this];

    // The resulting screen can be different from the screen requested if
    // for example the application has been assigned to a specific display.
    auto resultingScreen = QCocoaScreen::get(nsWindow.screen);

    // But may not always be resolved at this point, in which case we fall back
    // to the target screen. The real screen will be delivered as a screen change
    // when resolved as part of ordering the window on screen.
    if (!resultingScreen)
        resultingScreen = targetCocoaScreen;

    if (resultingScreen->screen() != window()->screen()) {
        QWindowSystemInterface::handleWindowScreenChanged<
            QWindowSystemInterface::SynchronousDelivery>(window(), resultingScreen->screen());
    }

    static QSharedPointer<QNSWindowDelegate> sharedDelegate([[QNSWindowDelegate alloc] init],
        [](QNSWindowDelegate *delegate) { [delegate release]; });
    nsWindow.delegate = sharedDelegate.get();

    // Prevent Cocoa from releasing the window on close. Qt
    // handles the close event asynchronously and we want to
    // make sure that NSWindow stays valid until the
    // QCocoaWindow is deleted by Qt.
    [nsWindow setReleasedWhenClosed:NO];

    if (alwaysShowToolWindow()) {
        static dispatch_once_t onceToken;
        dispatch_once(&onceToken, ^{
            NSNotificationCenter *center = [NSNotificationCenter defaultCenter];
            [center addObserver:[QNSWindow class] selector:@selector(applicationActivationChanged:)
                name:NSApplicationWillResignActiveNotification object:nil];
            [center addObserver:[QNSWindow class] selector:@selector(applicationActivationChanged:)
                name:NSApplicationWillBecomeActiveNotification object:nil];
        });
    }

    nsWindow.restorable = NO;
    nsWindow.level = windowLevel(flags);
    nsWindow.tabbingMode = NSWindowTabbingModeDisallowed;

    if (shouldBePanel) {
        // Qt::Tool windows hide on app deactivation, unless Qt::WA_MacAlwaysShowToolWindow is set
        nsWindow.hidesOnDeactivate = ((type & Qt::Tool) == Qt::Tool) && !alwaysShowToolWindow();

        // Make popup windows show on the same desktop as the parent full-screen window
        nsWindow.collectionBehavior = NSWindowCollectionBehaviorFullScreenAuxiliary;

        if ((type & Qt::Popup) == Qt::Popup) {
            nsWindow.hasShadow = YES;
            nsWindow.animationBehavior = NSWindowAnimationBehaviorUtilityWindow;
        }
    }

    // Persist modality so we can detect changes later on
    m_windowModality = QPlatformWindow::window()->modality();

    applyContentBorderThickness(nsWindow);

    if (QColorSpace colorSpace = format().colorSpace(); colorSpace.isValid()) {
        NSData *iccData = colorSpace.iccProfile().toNSData();
        nsWindow.colorSpace = [[[NSColorSpace alloc] initWithICCProfileData:iccData] autorelease];
        qCDebug(lcQpaDrawing) << "Set" << this << "color space to" << nsWindow.colorSpace;
    }

    return nsWindow;
}

bool QCocoaWindow::alwaysShowToolWindow() const
{
    return qt_mac_resolveOption(false, window(), "_q_macAlwaysShowToolWindow", "");
}

bool QCocoaWindow::setWindowModified(bool modified)
{
    if (!isContentView())
        return false;

    m_view.window.documentEdited = modified;
    return true;
}

void QCocoaWindow::setMenubar(QCocoaMenuBar *mb)
{
    m_menubar = mb;
}

QCocoaMenuBar *QCocoaWindow::menubar() const
{
    return m_menubar;
}

void QCocoaWindow::setWindowCursor(NSCursor *cursor)
{
    // Setting a cursor in a foreign view is not supported
    if (isForeignWindow())
        return;

    QNSView *view = qnsview_cast(m_view);
    if (cursor == view.cursor)
        return;

    view.cursor = cursor;

    [m_view.window invalidateCursorRectsForView:m_view];

    // There's a bug in AppKit where calling invalidateCursorRectsForView when
    // there's an override cursor active (for example when hovering over the
    // window frame), will not result in a cursorUpdate: callback. To work around
    // this we synthesize a cursor update event and call the callback ourselves,
    // if we detect that the mouse is currently over the view.
    auto locationInWindow = m_view.window.mouseLocationOutsideOfEventStream;
    auto locationInSuperview = [m_view.superview convertPoint:locationInWindow fromView:nil];
    if ([m_view hitTest:locationInSuperview] == m_view) {
        [m_view cursorUpdate:[NSEvent enterExitEventWithType:NSEventTypeCursorUpdate
            location:locationInWindow modifierFlags:0 timestamp:0
            windowNumber:m_view.window.windowNumber context:nil
            eventNumber:0 trackingNumber:0 userData:0]];
    }
}

void QCocoaWindow::registerTouch(bool enable)
{
    m_registerTouchCount += enable ? 1 : -1;
    if (enable && m_registerTouchCount == 1)
        m_view.allowedTouchTypes |= NSTouchTypeMaskIndirect;
    else if (m_registerTouchCount == 0)
        m_view.allowedTouchTypes &= ~NSTouchTypeMaskIndirect;
}

void QCocoaWindow::setContentBorderThickness(int topThickness, int bottomThickness)
{
    m_topContentBorderThickness = topThickness;
    m_bottomContentBorderThickness = bottomThickness;
    bool enable = (topThickness > 0 || bottomThickness > 0);
    m_drawContentBorderGradient = enable;

    applyContentBorderThickness();
}

void QCocoaWindow::registerContentBorderArea(quintptr identifier, int upper, int lower)
{
    m_contentBorderAreas.insert(identifier, BorderRange(identifier, upper, lower));
    applyContentBorderThickness();
}

void QCocoaWindow::setContentBorderAreaEnabled(quintptr identifier, bool enable)
{
    m_enabledContentBorderAreas.insert(identifier, enable);
    applyContentBorderThickness();
}

void QCocoaWindow::setContentBorderEnabled(bool enable)
{
    m_drawContentBorderGradient = enable;
    applyContentBorderThickness();
}

void QCocoaWindow::applyContentBorderThickness(NSWindow *window)
{
    if (!window && isContentView())
        window = m_view.window;

    if (!window)
        return;

    if (!m_drawContentBorderGradient) {
        window.styleMask = window.styleMask & ~NSWindowStyleMaskTexturedBackground;
        [window.contentView.superview setNeedsDisplay:YES];
        window.titlebarAppearsTransparent = NO;
        return;
    }

    // Find consecutive registered border areas, starting from the top.
    std::vector<BorderRange> ranges(m_contentBorderAreas.cbegin(), m_contentBorderAreas.cend());
    std::sort(ranges.begin(), ranges.end());
    int effectiveTopContentBorderThickness = m_topContentBorderThickness;
    for (BorderRange range : ranges) {
        // Skip disiabled ranges (typically hidden tool bars)
        if (!m_enabledContentBorderAreas.value(range.identifier, false))
            continue;

        // Is this sub-range adjacent to or overlapping the
        // existing total border area range? If so merge
        // it into the total range,
        if (range.upper <= (effectiveTopContentBorderThickness + 1))
            effectiveTopContentBorderThickness = qMax(effectiveTopContentBorderThickness, range.lower);
        else
            break;
    }

    int effectiveBottomContentBorderThickness = m_bottomContentBorderThickness;

    [window setStyleMask:[window styleMask] | NSWindowStyleMaskTexturedBackground];
    window.titlebarAppearsTransparent = YES;

    // Setting titlebarAppearsTransparent to YES means that the border thickness has to account
    // for the title bar height as well, otherwise sheets will not be presented at the correct
    // position, which should be (title bar height + top content border size).
    const NSRect frameRect = window.frame;
    const NSRect contentRect = [window contentRectForFrameRect:frameRect];
    const CGFloat titlebarHeight = frameRect.size.height - contentRect.size.height;
    effectiveTopContentBorderThickness += titlebarHeight;

    [window setContentBorderThickness:effectiveTopContentBorderThickness forEdge:NSMaxYEdge];
    [window setAutorecalculatesContentBorderThickness:NO forEdge:NSMaxYEdge];

    [window setContentBorderThickness:effectiveBottomContentBorderThickness forEdge:NSMinYEdge];
    [window setAutorecalculatesContentBorderThickness:NO forEdge:NSMinYEdge];

    [[[window contentView] superview] setNeedsDisplay:YES];
}

void QCocoaWindow::updateNSToolbar()
{
    if (!isContentView())
        return;

    NSToolbar *toolbar = QCocoaIntegration::instance()->toolbar(window());
    const NSWindow *window = m_view.window;

    if (window.toolbar == toolbar)
       return;

    window.toolbar = toolbar;
    window.showsToolbarButton = YES;
}

bool QCocoaWindow::testContentBorderAreaPosition(int position) const
{
    if (!m_drawContentBorderGradient || !isContentView())
        return false;

    // Determine if the given y position (relative to the content area) is inside the
    // unified toolbar area. Note that the value returned by contentBorderThicknessForEdge
    // includes the title bar height; subtract it.
    const int contentBorderThickness = [m_view.window contentBorderThicknessForEdge:NSMaxYEdge];
    const NSRect frameRect = m_view.window.frame;
    const NSRect contentRect = [m_view.window contentRectForFrameRect:frameRect];
    const CGFloat titlebarHeight = frameRect.size.height - contentRect.size.height;
    return 0 <= position && position < (contentBorderThickness - titlebarHeight);
}

qreal QCocoaWindow::devicePixelRatio() const
{
    // The documented way to observe the relationship between device-independent
    // and device pixels is to use one for the convertToBacking functions. Other
    // methods such as [NSWindow backingScaleFacor] might not give the correct
    // result, for example if setWantsBestResolutionOpenGLSurface is not set or
    // or ignored by the OpenGL driver.
    NSSize backingSize = [m_view convertSizeToBacking:NSMakeSize(1.0, 1.0)];
    return backingSize.height;
}

QWindow *QCocoaWindow::childWindowAt(QPoint windowPoint)
{
    QWindow *targetWindow = window();
    for (QObject *child : targetWindow->children())
        if (QWindow *childWindow = qobject_cast<QWindow *>(child))
            if (QPlatformWindow *handle = childWindow->handle())
                if (handle->isExposed() && childWindow->geometry().contains(windowPoint))
                    targetWindow = static_cast<QCocoaWindow*>(handle)->childWindowAt(windowPoint - childWindow->position());

    return targetWindow;
}

bool QCocoaWindow::shouldRefuseKeyWindowAndFirstResponder()
{
    // This function speaks up if there's any reason
    // to refuse key window or first responder state.

    if (window()->flags() & (Qt::WindowDoesNotAcceptFocus | Qt::WindowTransparentForInput))
        return true;

    if (m_inSetVisible) {
        QVariant showWithoutActivating = window()->property("_q_showWithoutActivating");
        if (showWithoutActivating.isValid() && showWithoutActivating.toBool())
            return true;
    }

    return false;
}

QPoint QCocoaWindow::bottomLeftClippedByNSWindowOffset() const
{
    if (!m_view)
        return QPoint();
    const NSPoint origin = [m_view isFlipped] ? NSMakePoint(0, [m_view frame].size.height)
                                                     : NSMakePoint(0,                                 0);
    const NSRect visibleRect = [m_view visibleRect];

    return QPoint(visibleRect.origin.x, -visibleRect.origin.y + (origin.y - visibleRect.size.height));
}

QMargins QCocoaWindow::frameMargins() const
{
    if (!isContentView())
        return QMargins();

    NSRect frameW = m_view.window.frame;
    NSRect frameC = [m_view.window contentRectForFrameRect:frameW];

    return QMargins(frameW.origin.x - frameC.origin.x,
        (frameW.origin.y + frameW.size.height) - (frameC.origin.y + frameC.size.height),
        (frameW.origin.x + frameW.size.width) - (frameC.origin.x + frameC.size.width),
        frameC.origin.y - frameW.origin.y);
}

void QCocoaWindow::setFrameStrutEventsEnabled(bool enabled)
{
    m_frameStrutEventsEnabled = enabled;
}

#ifndef QT_NO_DEBUG_STREAM
QDebug operator<<(QDebug debug, const QCocoaWindow *window)
{
    QDebugStateSaver saver(debug);
    debug.nospace();
    debug << "QCocoaWindow(" << (const void *)window;
    if (window)
        debug << ", window=" << window->window();
    debug << ')';
    return debug;
}
#endif // !QT_NO_DEBUG_STREAM

QT_END_NAMESPACE

#include "moc_qcocoawindow.cpp"