Utils: Move reuse.h out of sight

It caused a deprecation warning in each user. The warning itself
is not gone but appears less often now.

Change-Id: I03a995897635a182fa254fa574ccbfbfc7515f1a
Reviewed-by: Christian Kandeler <christian.kandeler@qt.io>

src/libs/utils/tooltip/tips.cpp

@@ -25,8 +25,8 @@
 
 #include "tips.h"
 #include "tooltip.h"
-#include "reuse.h"
 
+#include <utils/hostosinfo.h>
 #include <utils/qtcassert.h>
 
 #include <QRect>
@@ -43,6 +43,12 @@
 #include <QPaintEvent>
 #include <QVBoxLayout>
 
+#include <QPoint>
+#include <QRect>
+#include <QWidget>
+#include <QApplication>
+#include <QDesktopWidget>
+
 #include <memory>
 
 namespace Utils {
@@ -287,5 +293,21 @@ bool WidgetTip::equals(int typeId, const QVariant &other, const QVariant &otherC
             && other.value<QWidget *>() == m_widget;
 }
 
+
+int screenNumber(const QPoint &pos, QWidget *w)
+{
+    if (QApplication::desktop()->isVirtualDesktop())
+        return QApplication::desktop()->screenNumber(pos);
+    else
+        return QApplication::desktop()->screenNumber(w);
+}
+
+QRect screenGeometry(const QPoint &pos, QWidget *w)
+{
+    if (HostOsInfo::isMacHost())
+        return QApplication::desktop()->availableGeometry(screenNumber(pos, w));
+    return QApplication::desktop()->screenGeometry(screenNumber(pos, w));
+}
+
 } // namespace Internal
 } // namespace Utils