Add QCocoaWindowFunctions and add a function to find the clip offset

Change-Id: I0f9cd1f923867f6f24b3bc54e442a16b5d2a11e4
Reviewed-by: Tim Blechmann <tim@klingt.org>
Reviewed-by: Morten Johan Sørvig <morten.sorvig@theqtcompany.com>

4 files changed, 117 insertions, 0 deletions

diff --git a/src/platformheaders/cocoafunctions/cocoafunctions.pri b/src/platformheaders/cocoafunctions/cocoafunctions.pri
new file mode 100644
index 0000000000..3987523f9a
--- /dev/null
+++ b/src/platformheaders/cocoafunctions/cocoafunctions.pri
@@ -0,0 +1 @@
+HEADERS += $$PWD/qcocoawindowfunctions.h
diff --git a/src/platformheaders/cocoafunctions/qcocoawindowfunctions.h b/src/platformheaders/cocoafunctions/qcocoawindowfunctions.h
new file mode 100644
index 0000000000..997f440e65
--- /dev/null
+++ b/src/platformheaders/cocoafunctions/qcocoawindowfunctions.h
@@ -0,0 +1,57 @@
+/****************************************************************************
+**
+** Copyright (C) 2015 The Qt Company Ltd.
+** Contact: http://www.qt.io/licensing/
+**
+** This file is part of the plugins of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL21$
+** 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 http://www.qt.io/terms-conditions. For further
+** information use the contact form at http://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 2.1 or version 3 as published by the Free
+** Software Foundation and appearing in the file LICENSE.LGPLv21 and
+** LICENSE.LGPLv3 included in the packaging of this file. Please review the
+** following information to ensure the GNU Lesser General Public License
+** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
+** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** As a special exception, The Qt Company gives you certain additional
+** rights. These rights are described in The Qt Company LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QXCBWINDOWFUNCTIONS_H
+#define QXCBWINDOWFUNCTIONS_H
+
+#include <QtPlatformHeaders/QPlatformHeaderHelper>
+
+QT_BEGIN_NAMESPACE
+
+class QWindow;
+
+class QCocoaWindowFunctions {
+public:
+    typedef QPoint (*BottomLeftClippedByNSWindowOffset)(QWindow *window);
+    static const QByteArray bottomLeftClippedByNSWindowOffsetIdentifier() { return QByteArrayLiteral("CocoaBottomLeftClippedByNSWindowOffset"); }
+
+    static QPoint bottomLeftClippedByNSWindowOffset(QWindow *window)
+    {
+        return QPlatformHeaderHelper::callPlatformFunction<QPoint, BottomLeftClippedByNSWindowOffset>(bottomLeftClippedByNSWindowOffsetIdentifier(),window);
+    }
+};
+
+
+QT_END_NAMESPACE
+
+#endif // QXCBWINDOWFUNCTIONS_H
diff --git a/src/platformheaders/cocoafunctions/qcocoawindowfunctions.qdoc b/src/platformheaders/cocoafunctions/qcocoawindowfunctions.qdoc
new file mode 100644
index 0000000000..e95f92edb5
--- /dev/null
+++ b/src/platformheaders/cocoafunctions/qcocoawindowfunctions.qdoc
@@ -0,0 +1,58 @@
+/****************************************************************************
+**
+** Copyright (C) 2015 The Qt Company Ltd.
+** Contact: http://www.qt.io/licensing/
+**
+** This file is part of the documentation of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:FDL$
+** 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 http://www.qt.io/terms-conditions. For further
+** information use the contact form at http://www.qt.io/contact-us.
+**
+** GNU Free Documentation License Usage
+** Alternatively, this file may be used under the terms of the GNU Free
+** Documentation License version 1.3 as published by the Free Software
+** Foundation and appearing in the file included in the packaging of
+** this file. Please review the following information to ensure
+** the GNU Free Documentation License version 1.3 requirements
+** will be met: http://www.gnu.org/copyleft/fdl.html.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+/*!
+    \class QCocoaWindowFunctions
+    \inmodule QtPlatformHeaders
+
+    \brief The QCocoaWindowFunctions class is an inline class containing
+    miscellaneous functionality for NSWindow and NSView window specific functionality.
+
+    \note There is no binary compatibility guarantee for this class,
+    meaning that an application using it is only guaranteed to work with the Qt
+    version it was developed against.
+*/
+
+/*!
+    \typedef QCocoaWindowFunctions::BottomLeftClippedByNSWindowOffset
+
+    This is the typedef for the function returned by QGuiApplication::platformFunction when passed clippedByNSWindowIdentifier.
+*/
+
+/*!
+    \fn QByteArray QCocoaWindowFunctions::bottomLeftClippedByNSWindowOffsetIdentifier()
+
+    This function returnes the bytearray that can be used to query
+    QGuiApplication::platformFunction to retrieve the BottomLeftClippedByNSWindowOffset function.
+*/
+
+/*!
+    \fn QPoint QCocoaWindowFunctions::bottomLeftClippedByNSWindowOffset(QWindow *window)
+
+    This is a convenience function that can be used directly instead of resolving the function pointer.
+    \a window will be relayed to the function retrieved by QGuiApplication
+*/
diff --git a/src/platformheaders/platformheaders.pro b/src/platformheaders/platformheaders.pro
index 6b6294d34c..1ced4f1c95 100644
--- a/src/platformheaders/platformheaders.pro
+++ b/src/platformheaders/platformheaders.pro
@@ -8,6 +8,7 @@ include(xcbfunctions/xcbfunctions.pri)
 include(eglfsfunctions/eglfsfunctions.pri)
 include(windowsfunctions/windowsfunctions.pri)
 include(helper/helper.pri)
+include(cocoafunctions/cocoafunctions.pri)
 
 QMAKE_DOCS = $$PWD/doc/qtplatformheaders.qdocconf