macOS: Replace deprecated CGDisplayIOServicePort function

There's no replacement function from Apple's side, so we have to iterate
the available displays and pick the right one based on the vendor, product
and serial number.

Change-Id: I437bee06bc6826c3214a701cd2c65f6109eeb3e7
Reviewed-by: Morten Johan Sørvig <morten.sorvig@qt.io>

3 files changed, 61 insertions, 6 deletions

diff --git a/src/plugins/platforms/cocoa/qcocoahelpers.h b/src/plugins/platforms/cocoa/qcocoahelpers.h
index 7810733255..bc0cd547cf 100644
--- a/src/plugins/platforms/cocoa/qcocoahelpers.h
+++ b/src/plugins/platforms/cocoa/qcocoahelpers.h
@@ -193,6 +193,19 @@ QT_NAMESPACE_ALIAS_OBJC_CLASS(QNSPanelContentsWrapper);
 
 // -------------------------------------------------------------------------
 
+// QAppleRefCounted expects the retain function to return the object
+io_object_t q_IOObjectRetain(io_object_t obj);
+// QAppleRefCounted expects the release function to return void
+void q_IOObjectRelease(io_object_t obj);
+
+template <typename T>
+class QIOType : public QAppleRefCounted<T, io_object_t, q_IOObjectRetain, q_IOObjectRelease>
+{
+    using QAppleRefCounted<T, io_object_t, q_IOObjectRetain, q_IOObjectRelease>::QAppleRefCounted;
+};
+
+// -------------------------------------------------------------------------
+
 // Depending on the ABI of the platform, we may need to use objc_msgSendSuper_stret:
 // - http://www.sealiesoftware.com/blog/archive/2008/10/30/objc_explain_objc_msgSend_stret.html
 // - https://lists.apple.com/archives/cocoa-dev/2008/Feb/msg02338.html
diff --git a/src/plugins/platforms/cocoa/qcocoahelpers.mm b/src/plugins/platforms/cocoa/qcocoahelpers.mm
index 9f9618177d..67d42a2544 100644
--- a/src/plugins/platforms/cocoa/qcocoahelpers.mm
+++ b/src/plugins/platforms/cocoa/qcocoahelpers.mm
@@ -408,4 +408,19 @@ QT_END_NAMESPACE
     [super layout];
 }
 
+// -------------------------------------------------------------------------
+
+io_object_t q_IOObjectRetain(io_object_t obj)
+{
+    kern_return_t ret = IOObjectRetain(obj);
+    Q_ASSERT(!ret);
+    return obj;
+}
+
+void q_IOObjectRelease(io_object_t obj)
+{
+    kern_return_t ret = IOObjectRelease(obj);
+    Q_ASSERT(!ret);
+}
+
 @end
diff --git a/src/plugins/platforms/cocoa/qcocoascreen.mm b/src/plugins/platforms/cocoa/qcocoascreen.mm
index 13e5220b6a..4bd26458a4 100644
--- a/src/plugins/platforms/cocoa/qcocoascreen.mm
+++ b/src/plugins/platforms/cocoa/qcocoascreen.mm
@@ -103,6 +103,38 @@ QRectF QCocoaScreen::flipCoordinate(const QRectF &rect) const
     return QRectF(flipCoordinate(rect.topLeft() + QPoint(0, rect.height())), rect.size());
 }
 
+static QString displayName(CGDirectDisplayID displayID)
+{
+    QIOType<io_iterator_t> iterator;
+    if (IOServiceGetMatchingServices(kIOMasterPortDefault,
+        IOServiceMatching("IODisplayConnect"), &iterator))
+        return QString();
+
+    QIOType<io_service_t> display;
+    while ((display = IOIteratorNext(iterator)) != 0)
+    {
+        NSDictionary *info = [(__bridge NSDictionary*)IODisplayCreateInfoDictionary(
+            display, kIODisplayOnlyPreferredName) autorelease];
+
+        if ([[info objectForKey:@kDisplayVendorID] longValue] != CGDisplayVendorNumber(displayID))
+            continue;
+
+        if ([[info objectForKey:@kDisplayProductID] longValue] != CGDisplayModelNumber(displayID))
+            continue;
+
+        if ([[info objectForKey:@kDisplaySerialNumber] longValue] != CGDisplaySerialNumber(displayID))
+            continue;
+
+        NSDictionary *localizedNames = [info objectForKey:@kDisplayProductName];
+        if (![localizedNames count])
+            break; // Correct screen, but no name in dictionary
+
+        return QString::fromNSString([localizedNames objectForKey:[[localizedNames allKeys] objectAtIndex:0]]);
+    }
+
+    return QString();
+}
+
 void QCocoaScreen::updateGeometry()
 {
     NSScreen *nsScreen = nativeScreen();
@@ -139,12 +171,7 @@ void QCocoaScreen::updateGeometry()
     if (refresh > 0)
         m_refreshRate = refresh;
 
-    // Get m_name (brand/model of the monitor)
-    NSDictionary *deviceInfo = (NSDictionary *)IODisplayCreateInfoDictionary(CGDisplayIOServicePort(dpy), kIODisplayOnlyPreferredName);
-    NSDictionary *localizedNames = [deviceInfo objectForKey:[NSString stringWithUTF8String:kDisplayProductName]];
-    if ([localizedNames count] > 0)
-        m_name = QString::fromUtf8([[localizedNames objectForKey:[[localizedNames allKeys] objectAtIndex:0]] UTF8String]);
-    [deviceInfo release];
+    m_name = displayName(dpy);
 
     QWindowSystemInterface::handleScreenGeometryChange(screen(), geometry(), availableGeometry());
     QWindowSystemInterface::handleScreenLogicalDotsPerInchChange(screen(), m_logicalDpi.first, m_logicalDpi.second);