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39
40#include "qcocoawindowmanager.h"
41#include "qcocoawindow.h"
42
43#include <QtCore/private/qcore_mac_p.h>
44
45#include <QtGui/qguiapplication.h>
46#include <QtGui/qwindow.h>
47
48QT_BEGIN_NAMESPACE
49
50QCocoaWindowManager *QCocoaWindowManager::instance()
51{
52    static auto *instance = new QCocoaWindowManager;
53    return instance;
54}
55
56QCocoaWindowManager::QCocoaWindowManager()
57{
58    if (NSApp) {
59        initialize();
60    } else {
61        static auto applicationDidFinishLaunching(QMacNotificationObserver(nil,
62            NSApplicationDidFinishLaunchingNotification, [this] { initialize(); }));
63    }
64}
65
66void QCocoaWindowManager::initialize()
67{
68    Q_ASSERT(NSApp);
69
70    // Whenever the modalWindow property of NSApplication changes we have a new
71    // modal session running. Observing the app modal window instead of our own
72    // event dispatcher sessions allows us to track session started by native
73    // APIs as well. We need to check the initial state as well, in case there
74    // is already a modal session running.
75    static auto modalSessionObserver(QMacKeyValueObserver(
76        NSApp, @"modalWindow", [this] { modalSessionChanged(); },
77        NSKeyValueObservingOptionInitial | NSKeyValueObservingOptionNew));
78}
79
80void QCocoaWindowManager::modalSessionChanged()
81{
82    // Make sure that no window is overlapping the modal window. This can
83    // happen for e.g. splash screens, which have the NSPopUpMenuWindowLevel.
84    for (auto *window : QGuiApplication::topLevelWindows()) {
85        auto *platformWindow = static_cast<QCocoaWindow*>(window->handle());
86        if (!platformWindow)
87            continue;
88
89        auto naturalWindowLevel = platformWindow->windowLevel(window->flags());
90        if (naturalWindowLevel > NSModalPanelWindowLevel) {
91            NSWindow *nativeWindow = platformWindow->nativeWindow();
92            if (NSApp.modalWindow) {
93                // Lower window to that of the modal windows, but no less
94                nativeWindow.level = NSModalPanelWindowLevel;
95                if ([nativeWindow isVisible])
96                    [nativeWindow orderBack:nil];
97            } else {
98                // Restore window's natural window level, whatever that was
99                nativeWindow.level = naturalWindowLevel;
100            }
101        }
102    }
103
104    // Our worksWhenModal implementation is declarative and will normally be picked
105    // up by AppKit when needed, but to make sure AppKit also reflects the state
106    // in the window tag, so that the window can be ordered front by clicking it,
107    // we need to explicitly call setWorksWhenModal.
108    for (id window in NSApp.windows) {
109        if ([window isKindOfClass:[QNSPanel class]]) {
110            auto *panel = static_cast<QNSPanel *>(window);
111            // Call setter to tell AppKit that our state has changed
112            [panel setWorksWhenModal:panel.worksWhenModal];
113        }
114    }
115}
116
117static void initializeWindowManager() { Q_UNUSED(QCocoaWindowManager::instance()); }
118Q_CONSTRUCTOR_FUNCTION(initializeWindowManager)
119
120QT_END_NAMESPACE
121
122