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diff --git a/src/lib/barrier/IScreen.h b/src/lib/barrier/IScreen.h
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+++ b/src/lib/barrier/IScreen.h
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+/*
+ * barrier -- mouse and keyboard sharing utility
+ * Copyright (C) 2012-2016 Symless Ltd.
+ * Copyright (C) 2003 Chris Schoeneman
+ * 
+ * This package is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * found in the file LICENSE that should have accompanied this file.
+ * 
+ * This package is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include "barrier/clipboard_types.h"
+#include "base/Event.h"
+#include "base/EventTypes.h"
+#include "common/IInterface.h"
+
+class IClipboard;
+
+//! Screen interface
+/*!
+This interface defines the methods common to all screens.
+*/
+class IScreen : public IInterface {
+public:
+    struct ClipboardInfo {
+    public:
+        ClipboardID        m_id;
+        UInt32            m_sequenceNumber;
+    };
+
+    //! @name accessors
+    //@{
+
+    //! Get event target
+    /*!
+    Returns the target used for events created by this object.
+    */
+    virtual void*        getEventTarget() const = 0;
+
+    //! Get clipboard
+    /*!
+    Save the contents of the clipboard indicated by \c id and return
+    true iff successful.
+    */
+    virtual bool        getClipboard(ClipboardID id, IClipboard*) const = 0;
+
+    //! Get screen shape
+    /*!
+    Return the position of the upper-left corner of the screen in \c x and
+    \c y and the size of the screen in \c width and \c height.
+    */
+    virtual void        getShape(SInt32& x, SInt32& y,
+                            SInt32& width, SInt32& height) const = 0;
+
+    //! Get cursor position
+    /*!
+    Return the current position of the cursor in \c x and \c y.
+    */
+    virtual void        getCursorPos(SInt32& x, SInt32& y) const = 0;
+    
+    //@}
+};