Merge remote-tracking branch 'origin/5.8' into 5.9

Conflicts:
	src/platformsupport/fontdatabases/freetype/qfontengine_ft.cpp
	src/platformsupport/fontdatabases/freetype/qfreetypefontdatabase.cpp
	src/plugins/platformthemes/gtk3/qgtk3dialoghelpers.cpp
	src/widgets/widgets/qtabbar.cpp

Change-Id: Iaa9daee5f7a6490d56257a3824730a35751ceb05

6 files changed, 8 insertions, 4 deletions

diff --git a/src/widgets/widgets/qabstractspinbox.cpp b/src/widgets/widgets/qabstractspinbox.cpp
index 7ee53587e6..501d9560d9 100644
--- a/src/widgets/widgets/qabstractspinbox.cpp
+++ b/src/widgets/widgets/qabstractspinbox.cpp
@@ -980,6 +980,7 @@ void QAbstractSpinBox::keyPressEvent(QKeyEvent *event)
     case Qt::Key_PageDown:
         steps *= 10;
         isPgUpOrDown = true;
+        Q_FALLTHROUGH();
     case Qt::Key_Up:
     case Qt::Key_Down: {
 #ifdef QT_KEYPAD_NAVIGATION
@@ -2115,6 +2116,7 @@ int QAbstractSpinBoxPrivate::variantCompare(const QVariant &arg1, const QVariant
     case QVariant::Invalid:
         if (arg2.type() == QVariant::Invalid)
             return 0;
+        Q_FALLTHROUGH();
     default:
         Q_ASSERT_X(0, "QAbstractSpinBoxPrivate::variantCompare",
                    qPrintable(QString::fromLatin1("Internal error 3 (%1 %2)").
diff --git a/src/widgets/widgets/qdatetimeedit.cpp b/src/widgets/widgets/qdatetimeedit.cpp
index cebfb9316a..0eaa110bee 100644
--- a/src/widgets/widgets/qdatetimeedit.cpp
+++ b/src/widgets/widgets/qdatetimeedit.cpp
@@ -1113,6 +1113,7 @@ void QDateTimeEdit::keyPressEvent(QKeyEvent *event)
                        && !(event->modifiers() & ~(Qt::ShiftModifier|Qt::KeypadModifier));
             break;
         }
+        Q_FALLTHROUGH();
     case Qt::Key_Left:
     case Qt::Key_Right:
         if (event->key() == Qt::Key_Left || event->key() == Qt::Key_Right) {
diff --git a/src/widgets/widgets/qeffects.cpp b/src/widgets/widgets/qeffects.cpp
index ecd85c2ca7..736f2599fe 100644
--- a/src/widgets/widgets/qeffects.cpp
+++ b/src/widgets/widgets/qeffects.cpp
@@ -196,6 +196,7 @@ bool QAlphaWidget::eventFilter(QObject *o, QEvent *e)
     case QEvent::Close:
        if (o != widget)
            break;
+       Q_FALLTHROUGH();
     case QEvent::MouseButtonPress:
     case QEvent::MouseButtonDblClick:
         showWidget = false;
diff --git a/src/widgets/widgets/qtabbar.cpp b/src/widgets/widgets/qtabbar.cpp
index eeece1a42a..d2bd7285ca 100644
--- a/src/widgets/widgets/qtabbar.cpp
+++ b/src/widgets/widgets/qtabbar.cpp
@@ -176,11 +176,10 @@ void QTabBarPrivate::initBasicStyleOption(QStyleOptionTab *option, int tabIndex)
 
     if (tab.textColor.isValid())
         option->palette.setColor(q->foregroundRole(), tab.textColor);
-#ifdef Q_OS_MACOS
-    else if (isCurrent && !documentMode && q->isActiveWindow()) {
+    else if (q->style()->inherits("QMacStyle")
+             && isCurrent && !documentMode && q->isActiveWindow()) {
         option->palette.setColor(QPalette::WindowText, Qt::white);
     }
-#endif
     option->icon = tab.icon;
     option->iconSize = q->iconSize();  // Will get the default value then.
 
diff --git a/src/widgets/widgets/qtoolbar.cpp b/src/widgets/widgets/qtoolbar.cpp
index 2a0912df0a..48fa88b7a0 100644
--- a/src/widgets/widgets/qtoolbar.cpp
+++ b/src/widgets/widgets/qtoolbar.cpp
@@ -1143,7 +1143,7 @@ bool QToolBar::event(QEvent *event)
     case QEvent::Hide:
         if (!isHidden())
             break;
-        // fallthrough intended
+        Q_FALLTHROUGH();
     case QEvent::Show:
         d->toggleViewAction->setChecked(event->type() == QEvent::Show);
 #ifdef Q_OS_OSX
diff --git a/src/widgets/widgets/qwidgetlinecontrol.cpp b/src/widgets/widgets/qwidgetlinecontrol.cpp
index a862274a3d..363e7157ac 100644
--- a/src/widgets/widgets/qwidgetlinecontrol.cpp
+++ b/src/widgets/widgets/qwidgetlinecontrol.cpp
@@ -1030,6 +1030,7 @@ void QWidgetLineControl::parseInputMask(const QString &maskFields)
                 break;
             case '\\':
                 escape = true;
+                Q_FALLTHROUGH();
             default:
                 s = true;
                 break;