testlib: start sharing common helper functions

... by moving them in QTestPrivate namespace (qtesthelpers_p.h). This
header file is a convenient staging area for helper APIs, eventually
some could be moved to public QTest API.

This header file utilizes the same pattern as other qtestlib header
files - wrapping functions with QT_${LIBNAME}_LIB to automatically
enable certain APIs based on what is in the projects dependencies,
e.g. QT += widgets.

Change-Id: Ic0266429939c1f3788912ad8b84fc6e0d5edd68b
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>

1 files changed, 112 insertions, 0 deletions

diff --git a/src/testlib/qtesthelpers_p.h b/src/testlib/qtesthelpers_p.h
new file mode 100644
index 0000000000..0e39f7aea2
--- /dev/null
+++ b/src/testlib/qtesthelpers_p.h
@@ -0,0 +1,112 @@
+/****************************************************************************
+**
+** Copyright (C) 2017 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the QtTest module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or (at your option) the GNU General
+** Public license version 3 or any later version approved by the KDE Free
+** Qt Foundation. The licenses are as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-2.0.html and
+** https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QTESTHELPERS_P_H
+#define QTESTHELPERS_P_H
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#include <QtCore/QFile>
+#include <QtCore/QString>
+#include <QtCore/QChar>
+#include <QtCore/QPoint>
+
+#ifdef QT_GUI_LIB
+#include <QtGui/QGuiApplication>
+#include <QtGui/QScreen>
+#endif
+
+#ifdef QT_WIDGETS_LIB
+#include <QtWidgets/QWidget>
+#endif
+
+QT_BEGIN_NAMESPACE
+
+namespace QTestPrivate {
+
+static inline bool canHandleUnicodeFileNames()
+{
+#if defined(Q_OS_WIN)
+    return true;
+#else
+    // Check for UTF-8 by converting the Euro symbol (see tst_utf8)
+    return QFile::encodeName(QString(QChar(0x20AC))) == QByteArrayLiteral("\342\202\254");
+#endif
+}
+
+#ifdef QT_WIDGETS_LIB
+static inline void centerOnScreen(QWidget *w, const QSize &size)
+{
+    const QPoint offset = QPoint(size.width() / 2, size.height() / 2);
+    w->move(QGuiApplication::primaryScreen()->availableGeometry().center() - offset);
+}
+
+static inline void centerOnScreen(QWidget *w)
+{
+    centerOnScreen(w, w->geometry().size());
+}
+
+/*! \internal
+
+    Make a widget frameless to prevent size constraints of title bars from interfering (Windows).
+*/
+static inline void setFrameless(QWidget *w)
+{
+    Qt::WindowFlags flags = w->windowFlags();
+    flags |= Qt::FramelessWindowHint;
+    flags &= ~(Qt::WindowTitleHint | Qt::WindowSystemMenuHint
+             | Qt::WindowMinMaxButtonsHint | Qt::WindowCloseButtonHint);
+    w->setWindowFlags(flags);
+}
+#endif // QT_WIDGETS_LIB
+
+} // namespace QTestPrivate
+
+QT_END_NAMESPACE
+
+#endif // QTESTHELPERS_P_H